v4.19.13 snapshot.
diff --git a/drivers/net/bonding/Makefile b/drivers/net/bonding/Makefile
new file mode 100644
index 0000000..6f4e808
--- /dev/null
+++ b/drivers/net/bonding/Makefile
@@ -0,0 +1,11 @@
+#
+# Makefile for the Ethernet Bonding driver
+#
+
+obj-$(CONFIG_BONDING) += bonding.o
+
+bonding-objs := bond_main.o bond_3ad.o bond_alb.o bond_sysfs.o bond_sysfs_slave.o bond_debugfs.o bond_netlink.o bond_options.o
+
+proc-$(CONFIG_PROC_FS) += bond_procfs.o
+bonding-objs += $(proc-y)
+
diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
new file mode 100644
index 0000000..93dfcef
--- /dev/null
+++ b/drivers/net/bonding/bond_3ad.c
@@ -0,0 +1,2680 @@
+/*
+ * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ */
+
+#include <linux/skbuff.h>
+#include <linux/if_ether.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+#include <linux/ethtool.h>
+#include <linux/etherdevice.h>
+#include <linux/if_bonding.h>
+#include <linux/pkt_sched.h>
+#include <net/net_namespace.h>
+#include <net/bonding.h>
+#include <net/bond_3ad.h>
+
+/* General definitions */
+#define AD_SHORT_TIMEOUT 1
+#define AD_LONG_TIMEOUT 0
+#define AD_STANDBY 0x2
+#define AD_MAX_TX_IN_SECOND 3
+#define AD_COLLECTOR_MAX_DELAY 0
+
+/* Timer definitions (43.4.4 in the 802.3ad standard) */
+#define AD_FAST_PERIODIC_TIME 1
+#define AD_SLOW_PERIODIC_TIME 30
+#define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
+#define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
+#define AD_CHURN_DETECTION_TIME 60
+#define AD_AGGREGATE_WAIT_TIME 2
+
+/* Port state definitions (43.4.2.2 in the 802.3ad standard) */
+#define AD_STATE_LACP_ACTIVITY 0x1
+#define AD_STATE_LACP_TIMEOUT 0x2
+#define AD_STATE_AGGREGATION 0x4
+#define AD_STATE_SYNCHRONIZATION 0x8
+#define AD_STATE_COLLECTING 0x10
+#define AD_STATE_DISTRIBUTING 0x20
+#define AD_STATE_DEFAULTED 0x40
+#define AD_STATE_EXPIRED 0x80
+
+/* Port Variables definitions used by the State Machines (43.4.7 in the
+ * 802.3ad standard)
+ */
+#define AD_PORT_BEGIN 0x1
+#define AD_PORT_LACP_ENABLED 0x2
+#define AD_PORT_ACTOR_CHURN 0x4
+#define AD_PORT_PARTNER_CHURN 0x8
+#define AD_PORT_READY 0x10
+#define AD_PORT_READY_N 0x20
+#define AD_PORT_MATCHED 0x40
+#define AD_PORT_STANDBY 0x80
+#define AD_PORT_SELECTED 0x100
+#define AD_PORT_MOVED 0x200
+#define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN)
+
+/* Port Key definitions
+ * key is determined according to the link speed, duplex and
+ * user key (which is yet not supported)
+ * --------------------------------------------------------------
+ * Port key | User key (10 bits) | Speed (5 bits) | Duplex|
+ * --------------------------------------------------------------
+ * |15 6|5 1|0
+ */
+#define AD_DUPLEX_KEY_MASKS 0x1
+#define AD_SPEED_KEY_MASKS 0x3E
+#define AD_USER_KEY_MASKS 0xFFC0
+
+enum ad_link_speed_type {
+ AD_LINK_SPEED_1MBPS = 1,
+ AD_LINK_SPEED_10MBPS,
+ AD_LINK_SPEED_100MBPS,
+ AD_LINK_SPEED_1000MBPS,
+ AD_LINK_SPEED_2500MBPS,
+ AD_LINK_SPEED_5000MBPS,
+ AD_LINK_SPEED_10000MBPS,
+ AD_LINK_SPEED_14000MBPS,
+ AD_LINK_SPEED_20000MBPS,
+ AD_LINK_SPEED_25000MBPS,
+ AD_LINK_SPEED_40000MBPS,
+ AD_LINK_SPEED_50000MBPS,
+ AD_LINK_SPEED_56000MBPS,
+ AD_LINK_SPEED_100000MBPS,
+};
+
+/* compare MAC addresses */
+#define MAC_ADDRESS_EQUAL(A, B) \
+ ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
+
+static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = {
+ 0, 0, 0, 0, 0, 0
+};
+static u16 ad_ticks_per_sec;
+static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
+
+static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned =
+ MULTICAST_LACPDU_ADDR;
+
+/* ================= main 802.3ad protocol functions ================== */
+static int ad_lacpdu_send(struct port *port);
+static int ad_marker_send(struct port *port, struct bond_marker *marker);
+static void ad_mux_machine(struct port *port, bool *update_slave_arr);
+static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
+static void ad_tx_machine(struct port *port);
+static void ad_periodic_machine(struct port *port);
+static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
+static void ad_agg_selection_logic(struct aggregator *aggregator,
+ bool *update_slave_arr);
+static void ad_clear_agg(struct aggregator *aggregator);
+static void ad_initialize_agg(struct aggregator *aggregator);
+static void ad_initialize_port(struct port *port, int lacp_fast);
+static void ad_enable_collecting_distributing(struct port *port,
+ bool *update_slave_arr);
+static void ad_disable_collecting_distributing(struct port *port,
+ bool *update_slave_arr);
+static void ad_marker_info_received(struct bond_marker *marker_info,
+ struct port *port);
+static void ad_marker_response_received(struct bond_marker *marker,
+ struct port *port);
+static void ad_update_actor_keys(struct port *port, bool reset);
+
+
+/* ================= api to bonding and kernel code ================== */
+
+/**
+ * __get_bond_by_port - get the port's bonding struct
+ * @port: the port we're looking at
+ *
+ * Return @port's bonding struct, or %NULL if it can't be found.
+ */
+static inline struct bonding *__get_bond_by_port(struct port *port)
+{
+ if (port->slave == NULL)
+ return NULL;
+
+ return bond_get_bond_by_slave(port->slave);
+}
+
+/**
+ * __get_first_agg - get the first aggregator in the bond
+ * @bond: the bond we're looking at
+ *
+ * Return the aggregator of the first slave in @bond, or %NULL if it can't be
+ * found.
+ * The caller must hold RCU or RTNL lock.
+ */
+static inline struct aggregator *__get_first_agg(struct port *port)
+{
+ struct bonding *bond = __get_bond_by_port(port);
+ struct slave *first_slave;
+ struct aggregator *agg;
+
+ /* If there's no bond for this port, or bond has no slaves */
+ if (bond == NULL)
+ return NULL;
+
+ rcu_read_lock();
+ first_slave = bond_first_slave_rcu(bond);
+ agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
+ rcu_read_unlock();
+
+ return agg;
+}
+
+/**
+ * __agg_has_partner - see if we have a partner
+ * @agg: the agregator we're looking at
+ *
+ * Return nonzero if aggregator has a partner (denoted by a non-zero ether
+ * address for the partner). Return 0 if not.
+ */
+static inline int __agg_has_partner(struct aggregator *agg)
+{
+ return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
+}
+
+/**
+ * __disable_port - disable the port's slave
+ * @port: the port we're looking at
+ */
+static inline void __disable_port(struct port *port)
+{
+ bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
+}
+
+/**
+ * __enable_port - enable the port's slave, if it's up
+ * @port: the port we're looking at
+ */
+static inline void __enable_port(struct port *port)
+{
+ struct slave *slave = port->slave;
+
+ if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
+ bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
+}
+
+/**
+ * __port_is_enabled - check if the port's slave is in active state
+ * @port: the port we're looking at
+ */
+static inline int __port_is_enabled(struct port *port)
+{
+ return bond_is_active_slave(port->slave);
+}
+
+/**
+ * __get_agg_selection_mode - get the aggregator selection mode
+ * @port: the port we're looking at
+ *
+ * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
+ */
+static inline u32 __get_agg_selection_mode(struct port *port)
+{
+ struct bonding *bond = __get_bond_by_port(port);
+
+ if (bond == NULL)
+ return BOND_AD_STABLE;
+
+ return bond->params.ad_select;
+}
+
+/**
+ * __check_agg_selection_timer - check if the selection timer has expired
+ * @port: the port we're looking at
+ */
+static inline int __check_agg_selection_timer(struct port *port)
+{
+ struct bonding *bond = __get_bond_by_port(port);
+
+ if (bond == NULL)
+ return 0;
+
+ return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
+}
+
+/**
+ * __get_link_speed - get a port's speed
+ * @port: the port we're looking at
+ *
+ * Return @port's speed in 802.3ad enum format. i.e. one of:
+ * 0,
+ * %AD_LINK_SPEED_10MBPS,
+ * %AD_LINK_SPEED_100MBPS,
+ * %AD_LINK_SPEED_1000MBPS,
+ * %AD_LINK_SPEED_2500MBPS,
+ * %AD_LINK_SPEED_5000MBPS,
+ * %AD_LINK_SPEED_10000MBPS
+ * %AD_LINK_SPEED_14000MBPS,
+ * %AD_LINK_SPEED_20000MBPS
+ * %AD_LINK_SPEED_25000MBPS
+ * %AD_LINK_SPEED_40000MBPS
+ * %AD_LINK_SPEED_50000MBPS
+ * %AD_LINK_SPEED_56000MBPS
+ * %AD_LINK_SPEED_100000MBPS
+ */
+static u16 __get_link_speed(struct port *port)
+{
+ struct slave *slave = port->slave;
+ u16 speed;
+
+ /* this if covers only a special case: when the configuration starts
+ * with link down, it sets the speed to 0.
+ * This is done in spite of the fact that the e100 driver reports 0
+ * to be compatible with MVT in the future.
+ */
+ if (slave->link != BOND_LINK_UP)
+ speed = 0;
+ else {
+ switch (slave->speed) {
+ case SPEED_10:
+ speed = AD_LINK_SPEED_10MBPS;
+ break;
+
+ case SPEED_100:
+ speed = AD_LINK_SPEED_100MBPS;
+ break;
+
+ case SPEED_1000:
+ speed = AD_LINK_SPEED_1000MBPS;
+ break;
+
+ case SPEED_2500:
+ speed = AD_LINK_SPEED_2500MBPS;
+ break;
+
+ case SPEED_5000:
+ speed = AD_LINK_SPEED_5000MBPS;
+ break;
+
+ case SPEED_10000:
+ speed = AD_LINK_SPEED_10000MBPS;
+ break;
+
+ case SPEED_14000:
+ speed = AD_LINK_SPEED_14000MBPS;
+ break;
+
+ case SPEED_20000:
+ speed = AD_LINK_SPEED_20000MBPS;
+ break;
+
+ case SPEED_25000:
+ speed = AD_LINK_SPEED_25000MBPS;
+ break;
+
+ case SPEED_40000:
+ speed = AD_LINK_SPEED_40000MBPS;
+ break;
+
+ case SPEED_50000:
+ speed = AD_LINK_SPEED_50000MBPS;
+ break;
+
+ case SPEED_56000:
+ speed = AD_LINK_SPEED_56000MBPS;
+ break;
+
+ case SPEED_100000:
+ speed = AD_LINK_SPEED_100000MBPS;
+ break;
+
+ default:
+ /* unknown speed value from ethtool. shouldn't happen */
+ if (slave->speed != SPEED_UNKNOWN)
+ pr_warn_once("%s: unknown ethtool speed (%d) for port %d (set it to 0)\n",
+ slave->bond->dev->name,
+ slave->speed,
+ port->actor_port_number);
+ speed = 0;
+ break;
+ }
+ }
+
+ netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n",
+ port->actor_port_number, speed);
+ return speed;
+}
+
+/**
+ * __get_duplex - get a port's duplex
+ * @port: the port we're looking at
+ *
+ * Return @port's duplex in 802.3ad bitmask format. i.e.:
+ * 0x01 if in full duplex
+ * 0x00 otherwise
+ */
+static u8 __get_duplex(struct port *port)
+{
+ struct slave *slave = port->slave;
+ u8 retval = 0x0;
+
+ /* handling a special case: when the configuration starts with
+ * link down, it sets the duplex to 0.
+ */
+ if (slave->link == BOND_LINK_UP) {
+ switch (slave->duplex) {
+ case DUPLEX_FULL:
+ retval = 0x1;
+ netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n",
+ port->actor_port_number);
+ break;
+ case DUPLEX_HALF:
+ default:
+ retval = 0x0;
+ netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n",
+ port->actor_port_number);
+ break;
+ }
+ }
+ return retval;
+}
+
+static void __ad_actor_update_port(struct port *port)
+{
+ const struct bonding *bond = bond_get_bond_by_slave(port->slave);
+
+ port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
+ port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority;
+}
+
+/* Conversions */
+
+/**
+ * __ad_timer_to_ticks - convert a given timer type to AD module ticks
+ * @timer_type: which timer to operate
+ * @par: timer parameter. see below
+ *
+ * If @timer_type is %current_while_timer, @par indicates long/short timer.
+ * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
+ * %SLOW_PERIODIC_TIME.
+ */
+static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
+{
+ u16 retval = 0; /* to silence the compiler */
+
+ switch (timer_type) {
+ case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
+ if (par)
+ retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
+ else
+ retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
+ break;
+ case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
+ retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
+ break;
+ case AD_PERIODIC_TIMER: /* for periodic machine */
+ retval = (par*ad_ticks_per_sec); /* long timeout */
+ break;
+ case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
+ retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
+ break;
+ case AD_WAIT_WHILE_TIMER: /* for selection machine */
+ retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
+ break;
+ }
+
+ return retval;
+}
+
+
+/* ================= ad_rx_machine helper functions ================== */
+
+/**
+ * __choose_matched - update a port's matched variable from a received lacpdu
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * Update the value of the matched variable, using parameter values from a
+ * newly received lacpdu. Parameter values for the partner carried in the
+ * received PDU are compared with the corresponding operational parameter
+ * values for the actor. Matched is set to TRUE if all of these parameters
+ * match and the PDU parameter partner_state.aggregation has the same value as
+ * actor_oper_port_state.aggregation and lacp will actively maintain the link
+ * in the aggregation. Matched is also set to TRUE if the value of
+ * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
+ * an individual link and lacp will actively maintain the link. Otherwise,
+ * matched is set to FALSE. LACP is considered to be actively maintaining the
+ * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
+ * the actor's actor_oper_port_state.lacp_activity and the PDU's
+ * partner_state.lacp_activity variables are TRUE.
+ *
+ * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
+ * used here to implement the language from 802.3ad 43.4.9 that requires
+ * recordPDU to "match" the LACPDU parameters to the stored values.
+ */
+static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
+{
+ /* check if all parameters are alike
+ * or this is individual link(aggregation == FALSE)
+ * then update the state machine Matched variable.
+ */
+ if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
+ (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
+ MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
+ (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
+ (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
+ ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
+ ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
+ ) {
+ port->sm_vars |= AD_PORT_MATCHED;
+ } else {
+ port->sm_vars &= ~AD_PORT_MATCHED;
+ }
+}
+
+/**
+ * __record_pdu - record parameters from a received lacpdu
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * Record the parameter values for the Actor carried in a received lacpdu as
+ * the current partner operational parameter values and sets
+ * actor_oper_port_state.defaulted to FALSE.
+ */
+static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
+{
+ if (lacpdu && port) {
+ struct port_params *partner = &port->partner_oper;
+
+ __choose_matched(lacpdu, port);
+ /* record the new parameter values for the partner
+ * operational
+ */
+ partner->port_number = ntohs(lacpdu->actor_port);
+ partner->port_priority = ntohs(lacpdu->actor_port_priority);
+ partner->system = lacpdu->actor_system;
+ partner->system_priority = ntohs(lacpdu->actor_system_priority);
+ partner->key = ntohs(lacpdu->actor_key);
+ partner->port_state = lacpdu->actor_state;
+
+ /* set actor_oper_port_state.defaulted to FALSE */
+ port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
+
+ /* set the partner sync. to on if the partner is sync,
+ * and the port is matched
+ */
+ if ((port->sm_vars & AD_PORT_MATCHED) &&
+ (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
+ partner->port_state |= AD_STATE_SYNCHRONIZATION;
+ pr_debug("%s partner sync=1\n", port->slave->dev->name);
+ } else {
+ partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
+ pr_debug("%s partner sync=0\n", port->slave->dev->name);
+ }
+ }
+}
+
+/**
+ * __record_default - record default parameters
+ * @port: the port we're looking at
+ *
+ * This function records the default parameter values for the partner carried
+ * in the Partner Admin parameters as the current partner operational parameter
+ * values and sets actor_oper_port_state.defaulted to TRUE.
+ */
+static void __record_default(struct port *port)
+{
+ if (port) {
+ /* record the partner admin parameters */
+ memcpy(&port->partner_oper, &port->partner_admin,
+ sizeof(struct port_params));
+
+ /* set actor_oper_port_state.defaulted to true */
+ port->actor_oper_port_state |= AD_STATE_DEFAULTED;
+ }
+}
+
+/**
+ * __update_selected - update a port's Selected variable from a received lacpdu
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * Update the value of the selected variable, using parameter values from a
+ * newly received lacpdu. The parameter values for the Actor carried in the
+ * received PDU are compared with the corresponding operational parameter
+ * values for the ports partner. If one or more of the comparisons shows that
+ * the value(s) received in the PDU differ from the current operational values,
+ * then selected is set to FALSE and actor_oper_port_state.synchronization is
+ * set to out_of_sync. Otherwise, selected remains unchanged.
+ */
+static void __update_selected(struct lacpdu *lacpdu, struct port *port)
+{
+ if (lacpdu && port) {
+ const struct port_params *partner = &port->partner_oper;
+
+ /* check if any parameter is different then
+ * update the state machine selected variable.
+ */
+ if (ntohs(lacpdu->actor_port) != partner->port_number ||
+ ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
+ !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
+ ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
+ ntohs(lacpdu->actor_key) != partner->key ||
+ (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
+ port->sm_vars &= ~AD_PORT_SELECTED;
+ }
+ }
+}
+
+/**
+ * __update_default_selected - update a port's Selected variable from Partner
+ * @port: the port we're looking at
+ *
+ * This function updates the value of the selected variable, using the partner
+ * administrative parameter values. The administrative values are compared with
+ * the corresponding operational parameter values for the partner. If one or
+ * more of the comparisons shows that the administrative value(s) differ from
+ * the current operational values, then Selected is set to FALSE and
+ * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
+ * Selected remains unchanged.
+ */
+static void __update_default_selected(struct port *port)
+{
+ if (port) {
+ const struct port_params *admin = &port->partner_admin;
+ const struct port_params *oper = &port->partner_oper;
+
+ /* check if any parameter is different then
+ * update the state machine selected variable.
+ */
+ if (admin->port_number != oper->port_number ||
+ admin->port_priority != oper->port_priority ||
+ !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
+ admin->system_priority != oper->system_priority ||
+ admin->key != oper->key ||
+ (admin->port_state & AD_STATE_AGGREGATION)
+ != (oper->port_state & AD_STATE_AGGREGATION)) {
+ port->sm_vars &= ~AD_PORT_SELECTED;
+ }
+ }
+}
+
+/**
+ * __update_ntt - update a port's ntt variable from a received lacpdu
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * Updates the value of the ntt variable, using parameter values from a newly
+ * received lacpdu. The parameter values for the partner carried in the
+ * received PDU are compared with the corresponding operational parameter
+ * values for the Actor. If one or more of the comparisons shows that the
+ * value(s) received in the PDU differ from the current operational values,
+ * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
+ */
+static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
+{
+ /* validate lacpdu and port */
+ if (lacpdu && port) {
+ /* check if any parameter is different then
+ * update the port->ntt.
+ */
+ if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
+ (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
+ !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
+ (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
+ (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
+ ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
+ ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
+ ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
+ ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
+ ) {
+ port->ntt = true;
+ }
+ }
+}
+
+/**
+ * __agg_ports_are_ready - check if all ports in an aggregator are ready
+ * @aggregator: the aggregator we're looking at
+ *
+ */
+static int __agg_ports_are_ready(struct aggregator *aggregator)
+{
+ struct port *port;
+ int retval = 1;
+
+ if (aggregator) {
+ /* scan all ports in this aggregator to verfy if they are
+ * all ready.
+ */
+ for (port = aggregator->lag_ports;
+ port;
+ port = port->next_port_in_aggregator) {
+ if (!(port->sm_vars & AD_PORT_READY_N)) {
+ retval = 0;
+ break;
+ }
+ }
+ }
+
+ return retval;
+}
+
+/**
+ * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
+ * @aggregator: the aggregator we're looking at
+ * @val: Should the ports' ready bit be set on or off
+ *
+ */
+static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
+{
+ struct port *port;
+
+ for (port = aggregator->lag_ports; port;
+ port = port->next_port_in_aggregator) {
+ if (val)
+ port->sm_vars |= AD_PORT_READY;
+ else
+ port->sm_vars &= ~AD_PORT_READY;
+ }
+}
+
+static int __agg_active_ports(struct aggregator *agg)
+{
+ struct port *port;
+ int active = 0;
+
+ for (port = agg->lag_ports; port;
+ port = port->next_port_in_aggregator) {
+ if (port->is_enabled)
+ active++;
+ }
+
+ return active;
+}
+
+/**
+ * __get_agg_bandwidth - get the total bandwidth of an aggregator
+ * @aggregator: the aggregator we're looking at
+ *
+ */
+static u32 __get_agg_bandwidth(struct aggregator *aggregator)
+{
+ int nports = __agg_active_ports(aggregator);
+ u32 bandwidth = 0;
+
+ if (nports) {
+ switch (__get_link_speed(aggregator->lag_ports)) {
+ case AD_LINK_SPEED_1MBPS:
+ bandwidth = nports;
+ break;
+ case AD_LINK_SPEED_10MBPS:
+ bandwidth = nports * 10;
+ break;
+ case AD_LINK_SPEED_100MBPS:
+ bandwidth = nports * 100;
+ break;
+ case AD_LINK_SPEED_1000MBPS:
+ bandwidth = nports * 1000;
+ break;
+ case AD_LINK_SPEED_2500MBPS:
+ bandwidth = nports * 2500;
+ break;
+ case AD_LINK_SPEED_5000MBPS:
+ bandwidth = nports * 5000;
+ break;
+ case AD_LINK_SPEED_10000MBPS:
+ bandwidth = nports * 10000;
+ break;
+ case AD_LINK_SPEED_14000MBPS:
+ bandwidth = nports * 14000;
+ break;
+ case AD_LINK_SPEED_20000MBPS:
+ bandwidth = nports * 20000;
+ break;
+ case AD_LINK_SPEED_25000MBPS:
+ bandwidth = nports * 25000;
+ break;
+ case AD_LINK_SPEED_40000MBPS:
+ bandwidth = nports * 40000;
+ break;
+ case AD_LINK_SPEED_50000MBPS:
+ bandwidth = nports * 50000;
+ break;
+ case AD_LINK_SPEED_56000MBPS:
+ bandwidth = nports * 56000;
+ break;
+ case AD_LINK_SPEED_100000MBPS:
+ bandwidth = nports * 100000;
+ break;
+ default:
+ bandwidth = 0; /* to silence the compiler */
+ }
+ }
+ return bandwidth;
+}
+
+/**
+ * __get_active_agg - get the current active aggregator
+ * @aggregator: the aggregator we're looking at
+ *
+ * Caller must hold RCU lock.
+ */
+static struct aggregator *__get_active_agg(struct aggregator *aggregator)
+{
+ struct bonding *bond = aggregator->slave->bond;
+ struct list_head *iter;
+ struct slave *slave;
+
+ bond_for_each_slave_rcu(bond, slave, iter)
+ if (SLAVE_AD_INFO(slave)->aggregator.is_active)
+ return &(SLAVE_AD_INFO(slave)->aggregator);
+
+ return NULL;
+}
+
+/**
+ * __update_lacpdu_from_port - update a port's lacpdu fields
+ * @port: the port we're looking at
+ */
+static inline void __update_lacpdu_from_port(struct port *port)
+{
+ struct lacpdu *lacpdu = &port->lacpdu;
+ const struct port_params *partner = &port->partner_oper;
+
+ /* update current actual Actor parameters
+ * lacpdu->subtype initialized
+ * lacpdu->version_number initialized
+ * lacpdu->tlv_type_actor_info initialized
+ * lacpdu->actor_information_length initialized
+ */
+
+ lacpdu->actor_system_priority = htons(port->actor_system_priority);
+ lacpdu->actor_system = port->actor_system;
+ lacpdu->actor_key = htons(port->actor_oper_port_key);
+ lacpdu->actor_port_priority = htons(port->actor_port_priority);
+ lacpdu->actor_port = htons(port->actor_port_number);
+ lacpdu->actor_state = port->actor_oper_port_state;
+ pr_debug("update lacpdu: %s, actor port state %x\n",
+ port->slave->dev->name, port->actor_oper_port_state);
+
+ /* lacpdu->reserved_3_1 initialized
+ * lacpdu->tlv_type_partner_info initialized
+ * lacpdu->partner_information_length initialized
+ */
+
+ lacpdu->partner_system_priority = htons(partner->system_priority);
+ lacpdu->partner_system = partner->system;
+ lacpdu->partner_key = htons(partner->key);
+ lacpdu->partner_port_priority = htons(partner->port_priority);
+ lacpdu->partner_port = htons(partner->port_number);
+ lacpdu->partner_state = partner->port_state;
+
+ /* lacpdu->reserved_3_2 initialized
+ * lacpdu->tlv_type_collector_info initialized
+ * lacpdu->collector_information_length initialized
+ * collector_max_delay initialized
+ * reserved_12[12] initialized
+ * tlv_type_terminator initialized
+ * terminator_length initialized
+ * reserved_50[50] initialized
+ */
+}
+
+/* ================= main 802.3ad protocol code ========================= */
+
+/**
+ * ad_lacpdu_send - send out a lacpdu packet on a given port
+ * @port: the port we're looking at
+ *
+ * Returns: 0 on success
+ * < 0 on error
+ */
+static int ad_lacpdu_send(struct port *port)
+{
+ struct slave *slave = port->slave;
+ struct sk_buff *skb;
+ struct lacpdu_header *lacpdu_header;
+ int length = sizeof(struct lacpdu_header);
+
+ skb = dev_alloc_skb(length);
+ if (!skb)
+ return -ENOMEM;
+
+ skb->dev = slave->dev;
+ skb_reset_mac_header(skb);
+ skb->network_header = skb->mac_header + ETH_HLEN;
+ skb->protocol = PKT_TYPE_LACPDU;
+ skb->priority = TC_PRIO_CONTROL;
+
+ lacpdu_header = skb_put(skb, length);
+
+ ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
+ /* Note: source address is set to be the member's PERMANENT address,
+ * because we use it to identify loopback lacpdus in receive.
+ */
+ ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
+ lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
+
+ lacpdu_header->lacpdu = port->lacpdu;
+
+ dev_queue_xmit(skb);
+
+ return 0;
+}
+
+/**
+ * ad_marker_send - send marker information/response on a given port
+ * @port: the port we're looking at
+ * @marker: marker data to send
+ *
+ * Returns: 0 on success
+ * < 0 on error
+ */
+static int ad_marker_send(struct port *port, struct bond_marker *marker)
+{
+ struct slave *slave = port->slave;
+ struct sk_buff *skb;
+ struct bond_marker_header *marker_header;
+ int length = sizeof(struct bond_marker_header);
+
+ skb = dev_alloc_skb(length + 16);
+ if (!skb)
+ return -ENOMEM;
+
+ skb_reserve(skb, 16);
+
+ skb->dev = slave->dev;
+ skb_reset_mac_header(skb);
+ skb->network_header = skb->mac_header + ETH_HLEN;
+ skb->protocol = PKT_TYPE_LACPDU;
+
+ marker_header = skb_put(skb, length);
+
+ ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
+ /* Note: source address is set to be the member's PERMANENT address,
+ * because we use it to identify loopback MARKERs in receive.
+ */
+ ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
+ marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
+
+ marker_header->marker = *marker;
+
+ dev_queue_xmit(skb);
+
+ return 0;
+}
+
+/**
+ * ad_mux_machine - handle a port's mux state machine
+ * @port: the port we're looking at
+ * @update_slave_arr: Does slave array need update?
+ */
+static void ad_mux_machine(struct port *port, bool *update_slave_arr)
+{
+ mux_states_t last_state;
+
+ /* keep current State Machine state to compare later if it was
+ * changed
+ */
+ last_state = port->sm_mux_state;
+
+ if (port->sm_vars & AD_PORT_BEGIN) {
+ port->sm_mux_state = AD_MUX_DETACHED;
+ } else {
+ switch (port->sm_mux_state) {
+ case AD_MUX_DETACHED:
+ if ((port->sm_vars & AD_PORT_SELECTED)
+ || (port->sm_vars & AD_PORT_STANDBY))
+ /* if SELECTED or STANDBY */
+ port->sm_mux_state = AD_MUX_WAITING;
+ break;
+ case AD_MUX_WAITING:
+ /* if SELECTED == FALSE return to DETACH state */
+ if (!(port->sm_vars & AD_PORT_SELECTED)) {
+ port->sm_vars &= ~AD_PORT_READY_N;
+ /* in order to withhold the Selection Logic to
+ * check all ports READY_N value every callback
+ * cycle to update ready variable, we check
+ * READY_N and update READY here
+ */
+ __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
+ port->sm_mux_state = AD_MUX_DETACHED;
+ break;
+ }
+
+ /* check if the wait_while_timer expired */
+ if (port->sm_mux_timer_counter
+ && !(--port->sm_mux_timer_counter))
+ port->sm_vars |= AD_PORT_READY_N;
+
+ /* in order to withhold the selection logic to check
+ * all ports READY_N value every callback cycle to
+ * update ready variable, we check READY_N and update
+ * READY here
+ */
+ __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
+
+ /* if the wait_while_timer expired, and the port is
+ * in READY state, move to ATTACHED state
+ */
+ if ((port->sm_vars & AD_PORT_READY)
+ && !port->sm_mux_timer_counter)
+ port->sm_mux_state = AD_MUX_ATTACHED;
+ break;
+ case AD_MUX_ATTACHED:
+ /* check also if agg_select_timer expired (so the
+ * edable port will take place only after this timer)
+ */
+ if ((port->sm_vars & AD_PORT_SELECTED) &&
+ (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) &&
+ !__check_agg_selection_timer(port)) {
+ if (port->aggregator->is_active)
+ port->sm_mux_state =
+ AD_MUX_COLLECTING_DISTRIBUTING;
+ } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
+ (port->sm_vars & AD_PORT_STANDBY)) {
+ /* if UNSELECTED or STANDBY */
+ port->sm_vars &= ~AD_PORT_READY_N;
+ /* in order to withhold the selection logic to
+ * check all ports READY_N value every callback
+ * cycle to update ready variable, we check
+ * READY_N and update READY here
+ */
+ __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
+ port->sm_mux_state = AD_MUX_DETACHED;
+ } else if (port->aggregator->is_active) {
+ port->actor_oper_port_state |=
+ AD_STATE_SYNCHRONIZATION;
+ }
+ break;
+ case AD_MUX_COLLECTING_DISTRIBUTING:
+ if (!(port->sm_vars & AD_PORT_SELECTED) ||
+ (port->sm_vars & AD_PORT_STANDBY) ||
+ !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) ||
+ !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) {
+ port->sm_mux_state = AD_MUX_ATTACHED;
+ } else {
+ /* if port state hasn't changed make
+ * sure that a collecting distributing
+ * port in an active aggregator is enabled
+ */
+ if (port->aggregator &&
+ port->aggregator->is_active &&
+ !__port_is_enabled(port)) {
+
+ __enable_port(port);
+ }
+ }
+ break;
+ default:
+ break;
+ }
+ }
+
+ /* check if the state machine was changed */
+ if (port->sm_mux_state != last_state) {
+ pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
+ port->actor_port_number,
+ port->slave->dev->name,
+ last_state,
+ port->sm_mux_state);
+ switch (port->sm_mux_state) {
+ case AD_MUX_DETACHED:
+ port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
+ ad_disable_collecting_distributing(port,
+ update_slave_arr);
+ port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
+ port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
+ port->ntt = true;
+ break;
+ case AD_MUX_WAITING:
+ port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
+ break;
+ case AD_MUX_ATTACHED:
+ if (port->aggregator->is_active)
+ port->actor_oper_port_state |=
+ AD_STATE_SYNCHRONIZATION;
+ else
+ port->actor_oper_port_state &=
+ ~AD_STATE_SYNCHRONIZATION;
+ port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
+ port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
+ ad_disable_collecting_distributing(port,
+ update_slave_arr);
+ port->ntt = true;
+ break;
+ case AD_MUX_COLLECTING_DISTRIBUTING:
+ port->actor_oper_port_state |= AD_STATE_COLLECTING;
+ port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
+ port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
+ ad_enable_collecting_distributing(port,
+ update_slave_arr);
+ port->ntt = true;
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+/**
+ * ad_rx_machine - handle a port's rx State Machine
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * If lacpdu arrived, stop previous timer (if exists) and set the next state as
+ * CURRENT. If timer expired set the state machine in the proper state.
+ * In other cases, this function checks if we need to switch to other state.
+ */
+static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
+{
+ rx_states_t last_state;
+
+ /* keep current State Machine state to compare later if it was
+ * changed
+ */
+ last_state = port->sm_rx_state;
+
+ /* check if state machine should change state */
+
+ /* first, check if port was reinitialized */
+ if (port->sm_vars & AD_PORT_BEGIN) {
+ port->sm_rx_state = AD_RX_INITIALIZE;
+ port->sm_vars |= AD_PORT_CHURNED;
+ /* check if port is not enabled */
+ } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled)
+ port->sm_rx_state = AD_RX_PORT_DISABLED;
+ /* check if new lacpdu arrived */
+ else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
+ (port->sm_rx_state == AD_RX_DEFAULTED) ||
+ (port->sm_rx_state == AD_RX_CURRENT))) {
+ if (port->sm_rx_state != AD_RX_CURRENT)
+ port->sm_vars |= AD_PORT_CHURNED;
+ port->sm_rx_timer_counter = 0;
+ port->sm_rx_state = AD_RX_CURRENT;
+ } else {
+ /* if timer is on, and if it is expired */
+ if (port->sm_rx_timer_counter &&
+ !(--port->sm_rx_timer_counter)) {
+ switch (port->sm_rx_state) {
+ case AD_RX_EXPIRED:
+ port->sm_rx_state = AD_RX_DEFAULTED;
+ break;
+ case AD_RX_CURRENT:
+ port->sm_rx_state = AD_RX_EXPIRED;
+ break;
+ default:
+ break;
+ }
+ } else {
+ /* if no lacpdu arrived and no timer is on */
+ switch (port->sm_rx_state) {
+ case AD_RX_PORT_DISABLED:
+ if (port->is_enabled &&
+ (port->sm_vars & AD_PORT_LACP_ENABLED))
+ port->sm_rx_state = AD_RX_EXPIRED;
+ else if (port->is_enabled
+ && ((port->sm_vars
+ & AD_PORT_LACP_ENABLED) == 0))
+ port->sm_rx_state = AD_RX_LACP_DISABLED;
+ break;
+ default:
+ break;
+
+ }
+ }
+ }
+
+ /* check if the State machine was changed or new lacpdu arrived */
+ if ((port->sm_rx_state != last_state) || (lacpdu)) {
+ pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
+ port->actor_port_number,
+ port->slave->dev->name,
+ last_state,
+ port->sm_rx_state);
+ switch (port->sm_rx_state) {
+ case AD_RX_INITIALIZE:
+ if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
+ port->sm_vars &= ~AD_PORT_LACP_ENABLED;
+ else
+ port->sm_vars |= AD_PORT_LACP_ENABLED;
+ port->sm_vars &= ~AD_PORT_SELECTED;
+ __record_default(port);
+ port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
+ port->sm_rx_state = AD_RX_PORT_DISABLED;
+
+ /* Fall Through */
+ case AD_RX_PORT_DISABLED:
+ port->sm_vars &= ~AD_PORT_MATCHED;
+ break;
+ case AD_RX_LACP_DISABLED:
+ port->sm_vars &= ~AD_PORT_SELECTED;
+ __record_default(port);
+ port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
+ port->sm_vars |= AD_PORT_MATCHED;
+ port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
+ break;
+ case AD_RX_EXPIRED:
+ /* Reset of the Synchronization flag (Standard 43.4.12)
+ * This reset cause to disable this port in the
+ * COLLECTING_DISTRIBUTING state of the mux machine in
+ * case of EXPIRED even if LINK_DOWN didn't arrive for
+ * the port.
+ */
+ port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
+ port->sm_vars &= ~AD_PORT_MATCHED;
+ port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT;
+ port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
+ port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
+ port->actor_oper_port_state |= AD_STATE_EXPIRED;
+ port->sm_vars |= AD_PORT_CHURNED;
+ break;
+ case AD_RX_DEFAULTED:
+ __update_default_selected(port);
+ __record_default(port);
+ port->sm_vars |= AD_PORT_MATCHED;
+ port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
+ break;
+ case AD_RX_CURRENT:
+ /* detect loopback situation */
+ if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
+ &(port->actor_system))) {
+ netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n"
+ "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
+ port->slave->dev->name);
+ return;
+ }
+ __update_selected(lacpdu, port);
+ __update_ntt(lacpdu, port);
+ __record_pdu(lacpdu, port);
+ port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
+ port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+/**
+ * ad_churn_machine - handle port churn's state machine
+ * @port: the port we're looking at
+ *
+ */
+static void ad_churn_machine(struct port *port)
+{
+ if (port->sm_vars & AD_PORT_CHURNED) {
+ port->sm_vars &= ~AD_PORT_CHURNED;
+ port->sm_churn_actor_state = AD_CHURN_MONITOR;
+ port->sm_churn_partner_state = AD_CHURN_MONITOR;
+ port->sm_churn_actor_timer_counter =
+ __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0);
+ port->sm_churn_partner_timer_counter =
+ __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0);
+ return;
+ }
+ if (port->sm_churn_actor_timer_counter &&
+ !(--port->sm_churn_actor_timer_counter) &&
+ port->sm_churn_actor_state == AD_CHURN_MONITOR) {
+ if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) {
+ port->sm_churn_actor_state = AD_NO_CHURN;
+ } else {
+ port->churn_actor_count++;
+ port->sm_churn_actor_state = AD_CHURN;
+ }
+ }
+ if (port->sm_churn_partner_timer_counter &&
+ !(--port->sm_churn_partner_timer_counter) &&
+ port->sm_churn_partner_state == AD_CHURN_MONITOR) {
+ if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) {
+ port->sm_churn_partner_state = AD_NO_CHURN;
+ } else {
+ port->churn_partner_count++;
+ port->sm_churn_partner_state = AD_CHURN;
+ }
+ }
+}
+
+/**
+ * ad_tx_machine - handle a port's tx state machine
+ * @port: the port we're looking at
+ */
+static void ad_tx_machine(struct port *port)
+{
+ /* check if tx timer expired, to verify that we do not send more than
+ * 3 packets per second
+ */
+ if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
+ /* check if there is something to send */
+ if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
+ __update_lacpdu_from_port(port);
+
+ if (ad_lacpdu_send(port) >= 0) {
+ pr_debug("Sent LACPDU on port %d\n",
+ port->actor_port_number);
+
+ /* mark ntt as false, so it will not be sent
+ * again until demanded
+ */
+ port->ntt = false;
+ }
+ }
+ /* restart tx timer(to verify that we will not exceed
+ * AD_MAX_TX_IN_SECOND
+ */
+ port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
+ }
+}
+
+/**
+ * ad_periodic_machine - handle a port's periodic state machine
+ * @port: the port we're looking at
+ *
+ * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
+ */
+static void ad_periodic_machine(struct port *port)
+{
+ periodic_states_t last_state;
+
+ /* keep current state machine state to compare later if it was changed */
+ last_state = port->sm_periodic_state;
+
+ /* check if port was reinitialized */
+ if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
+ (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
+ ) {
+ port->sm_periodic_state = AD_NO_PERIODIC;
+ }
+ /* check if state machine should change state */
+ else if (port->sm_periodic_timer_counter) {
+ /* check if periodic state machine expired */
+ if (!(--port->sm_periodic_timer_counter)) {
+ /* if expired then do tx */
+ port->sm_periodic_state = AD_PERIODIC_TX;
+ } else {
+ /* If not expired, check if there is some new timeout
+ * parameter from the partner state
+ */
+ switch (port->sm_periodic_state) {
+ case AD_FAST_PERIODIC:
+ if (!(port->partner_oper.port_state
+ & AD_STATE_LACP_TIMEOUT))
+ port->sm_periodic_state = AD_SLOW_PERIODIC;
+ break;
+ case AD_SLOW_PERIODIC:
+ if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
+ port->sm_periodic_timer_counter = 0;
+ port->sm_periodic_state = AD_PERIODIC_TX;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ } else {
+ switch (port->sm_periodic_state) {
+ case AD_NO_PERIODIC:
+ port->sm_periodic_state = AD_FAST_PERIODIC;
+ break;
+ case AD_PERIODIC_TX:
+ if (!(port->partner_oper.port_state &
+ AD_STATE_LACP_TIMEOUT))
+ port->sm_periodic_state = AD_SLOW_PERIODIC;
+ else
+ port->sm_periodic_state = AD_FAST_PERIODIC;
+ break;
+ default:
+ break;
+ }
+ }
+
+ /* check if the state machine was changed */
+ if (port->sm_periodic_state != last_state) {
+ pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
+ port->actor_port_number, last_state,
+ port->sm_periodic_state);
+ switch (port->sm_periodic_state) {
+ case AD_NO_PERIODIC:
+ port->sm_periodic_timer_counter = 0;
+ break;
+ case AD_FAST_PERIODIC:
+ /* decrement 1 tick we lost in the PERIODIC_TX cycle */
+ port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
+ break;
+ case AD_SLOW_PERIODIC:
+ /* decrement 1 tick we lost in the PERIODIC_TX cycle */
+ port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
+ break;
+ case AD_PERIODIC_TX:
+ port->ntt = true;
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+/**
+ * ad_port_selection_logic - select aggregation groups
+ * @port: the port we're looking at
+ * @update_slave_arr: Does slave array need update?
+ *
+ * Select aggregation groups, and assign each port for it's aggregetor. The
+ * selection logic is called in the inititalization (after all the handshkes),
+ * and after every lacpdu receive (if selected is off).
+ */
+static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
+{
+ struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
+ struct port *last_port = NULL, *curr_port;
+ struct list_head *iter;
+ struct bonding *bond;
+ struct slave *slave;
+ int found = 0;
+
+ /* if the port is already Selected, do nothing */
+ if (port->sm_vars & AD_PORT_SELECTED)
+ return;
+
+ bond = __get_bond_by_port(port);
+
+ /* if the port is connected to other aggregator, detach it */
+ if (port->aggregator) {
+ /* detach the port from its former aggregator */
+ temp_aggregator = port->aggregator;
+ for (curr_port = temp_aggregator->lag_ports; curr_port;
+ last_port = curr_port,
+ curr_port = curr_port->next_port_in_aggregator) {
+ if (curr_port == port) {
+ temp_aggregator->num_of_ports--;
+ /* if it is the first port attached to the
+ * aggregator
+ */
+ if (!last_port) {
+ temp_aggregator->lag_ports =
+ port->next_port_in_aggregator;
+ } else {
+ /* not the first port attached to the
+ * aggregator
+ */
+ last_port->next_port_in_aggregator =
+ port->next_port_in_aggregator;
+ }
+
+ /* clear the port's relations to this
+ * aggregator
+ */
+ port->aggregator = NULL;
+ port->next_port_in_aggregator = NULL;
+ port->actor_port_aggregator_identifier = 0;
+
+ netdev_dbg(bond->dev, "Port %d left LAG %d\n",
+ port->actor_port_number,
+ temp_aggregator->aggregator_identifier);
+ /* if the aggregator is empty, clear its
+ * parameters, and set it ready to be attached
+ */
+ if (!temp_aggregator->lag_ports)
+ ad_clear_agg(temp_aggregator);
+ break;
+ }
+ }
+ if (!curr_port) {
+ /* meaning: the port was related to an aggregator
+ * but was not on the aggregator port list
+ */
+ net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
+ port->slave->bond->dev->name,
+ port->actor_port_number,
+ port->slave->dev->name,
+ port->aggregator->aggregator_identifier);
+ }
+ }
+ /* search on all aggregators for a suitable aggregator for this port */
+ bond_for_each_slave(bond, slave, iter) {
+ aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
+
+ /* keep a free aggregator for later use(if needed) */
+ if (!aggregator->lag_ports) {
+ if (!free_aggregator)
+ free_aggregator = aggregator;
+ continue;
+ }
+ /* check if current aggregator suits us */
+ if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
+ MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
+ (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
+ (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
+ ) &&
+ ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
+ !aggregator->is_individual) /* but is not individual OR */
+ )
+ ) {
+ /* attach to the founded aggregator */
+ port->aggregator = aggregator;
+ port->actor_port_aggregator_identifier =
+ port->aggregator->aggregator_identifier;
+ port->next_port_in_aggregator = aggregator->lag_ports;
+ port->aggregator->num_of_ports++;
+ aggregator->lag_ports = port;
+ netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n",
+ port->actor_port_number,
+ port->aggregator->aggregator_identifier);
+
+ /* mark this port as selected */
+ port->sm_vars |= AD_PORT_SELECTED;
+ found = 1;
+ break;
+ }
+ }
+
+ /* the port couldn't find an aggregator - attach it to a new
+ * aggregator
+ */
+ if (!found) {
+ if (free_aggregator) {
+ /* assign port a new aggregator */
+ port->aggregator = free_aggregator;
+ port->actor_port_aggregator_identifier =
+ port->aggregator->aggregator_identifier;
+
+ /* update the new aggregator's parameters
+ * if port was responsed from the end-user
+ */
+ if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
+ /* if port is full duplex */
+ port->aggregator->is_individual = false;
+ else
+ port->aggregator->is_individual = true;
+
+ port->aggregator->actor_admin_aggregator_key =
+ port->actor_admin_port_key;
+ port->aggregator->actor_oper_aggregator_key =
+ port->actor_oper_port_key;
+ port->aggregator->partner_system =
+ port->partner_oper.system;
+ port->aggregator->partner_system_priority =
+ port->partner_oper.system_priority;
+ port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
+ port->aggregator->receive_state = 1;
+ port->aggregator->transmit_state = 1;
+ port->aggregator->lag_ports = port;
+ port->aggregator->num_of_ports++;
+
+ /* mark this port as selected */
+ port->sm_vars |= AD_PORT_SELECTED;
+
+ netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n",
+ port->actor_port_number,
+ port->aggregator->aggregator_identifier);
+ } else {
+ netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n",
+ port->actor_port_number, port->slave->dev->name);
+ }
+ }
+ /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
+ * in all aggregator's ports, else set ready=FALSE in all
+ * aggregator's ports
+ */
+ __set_agg_ports_ready(port->aggregator,
+ __agg_ports_are_ready(port->aggregator));
+
+ aggregator = __get_first_agg(port);
+ ad_agg_selection_logic(aggregator, update_slave_arr);
+
+ if (!port->aggregator->is_active)
+ port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
+}
+
+/* Decide if "agg" is a better choice for the new active aggregator that
+ * the current best, according to the ad_select policy.
+ */
+static struct aggregator *ad_agg_selection_test(struct aggregator *best,
+ struct aggregator *curr)
+{
+ /* 0. If no best, select current.
+ *
+ * 1. If the current agg is not individual, and the best is
+ * individual, select current.
+ *
+ * 2. If current agg is individual and the best is not, keep best.
+ *
+ * 3. Therefore, current and best are both individual or both not
+ * individual, so:
+ *
+ * 3a. If current agg partner replied, and best agg partner did not,
+ * select current.
+ *
+ * 3b. If current agg partner did not reply and best agg partner
+ * did reply, keep best.
+ *
+ * 4. Therefore, current and best both have partner replies or
+ * both do not, so perform selection policy:
+ *
+ * BOND_AD_COUNT: Select by count of ports. If count is equal,
+ * select by bandwidth.
+ *
+ * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
+ */
+ if (!best)
+ return curr;
+
+ if (!curr->is_individual && best->is_individual)
+ return curr;
+
+ if (curr->is_individual && !best->is_individual)
+ return best;
+
+ if (__agg_has_partner(curr) && !__agg_has_partner(best))
+ return curr;
+
+ if (!__agg_has_partner(curr) && __agg_has_partner(best))
+ return best;
+
+ switch (__get_agg_selection_mode(curr->lag_ports)) {
+ case BOND_AD_COUNT:
+ if (__agg_active_ports(curr) > __agg_active_ports(best))
+ return curr;
+
+ if (__agg_active_ports(curr) < __agg_active_ports(best))
+ return best;
+
+ /*FALLTHROUGH*/
+ case BOND_AD_STABLE:
+ case BOND_AD_BANDWIDTH:
+ if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
+ return curr;
+
+ break;
+
+ default:
+ net_warn_ratelimited("%s: Impossible agg select mode %d\n",
+ curr->slave->bond->dev->name,
+ __get_agg_selection_mode(curr->lag_ports));
+ break;
+ }
+
+ return best;
+}
+
+static int agg_device_up(const struct aggregator *agg)
+{
+ struct port *port = agg->lag_ports;
+
+ if (!port)
+ return 0;
+
+ for (port = agg->lag_ports; port;
+ port = port->next_port_in_aggregator) {
+ if (netif_running(port->slave->dev) &&
+ netif_carrier_ok(port->slave->dev))
+ return 1;
+ }
+
+ return 0;
+}
+
+/**
+ * ad_agg_selection_logic - select an aggregation group for a team
+ * @aggregator: the aggregator we're looking at
+ * @update_slave_arr: Does slave array need update?
+ *
+ * It is assumed that only one aggregator may be selected for a team.
+ *
+ * The logic of this function is to select the aggregator according to
+ * the ad_select policy:
+ *
+ * BOND_AD_STABLE: select the aggregator with the most ports attached to
+ * it, and to reselect the active aggregator only if the previous
+ * aggregator has no more ports related to it.
+ *
+ * BOND_AD_BANDWIDTH: select the aggregator with the highest total
+ * bandwidth, and reselect whenever a link state change takes place or the
+ * set of slaves in the bond changes.
+ *
+ * BOND_AD_COUNT: select the aggregator with largest number of ports
+ * (slaves), and reselect whenever a link state change takes place or the
+ * set of slaves in the bond changes.
+ *
+ * FIXME: this function MUST be called with the first agg in the bond, or
+ * __get_active_agg() won't work correctly. This function should be better
+ * called with the bond itself, and retrieve the first agg from it.
+ */
+static void ad_agg_selection_logic(struct aggregator *agg,
+ bool *update_slave_arr)
+{
+ struct aggregator *best, *active, *origin;
+ struct bonding *bond = agg->slave->bond;
+ struct list_head *iter;
+ struct slave *slave;
+ struct port *port;
+
+ rcu_read_lock();
+ origin = agg;
+ active = __get_active_agg(agg);
+ best = (active && agg_device_up(active)) ? active : NULL;
+
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ agg = &(SLAVE_AD_INFO(slave)->aggregator);
+
+ agg->is_active = 0;
+
+ if (__agg_active_ports(agg) && agg_device_up(agg))
+ best = ad_agg_selection_test(best, agg);
+ }
+
+ if (best &&
+ __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
+ /* For the STABLE policy, don't replace the old active
+ * aggregator if it's still active (it has an answering
+ * partner) or if both the best and active don't have an
+ * answering partner.
+ */
+ if (active && active->lag_ports &&
+ __agg_active_ports(active) &&
+ (__agg_has_partner(active) ||
+ (!__agg_has_partner(active) &&
+ !__agg_has_partner(best)))) {
+ if (!(!active->actor_oper_aggregator_key &&
+ best->actor_oper_aggregator_key)) {
+ best = NULL;
+ active->is_active = 1;
+ }
+ }
+ }
+
+ if (best && (best == active)) {
+ best = NULL;
+ active->is_active = 1;
+ }
+
+ /* if there is new best aggregator, activate it */
+ if (best) {
+ netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
+ best->aggregator_identifier, best->num_of_ports,
+ best->actor_oper_aggregator_key,
+ best->partner_oper_aggregator_key,
+ best->is_individual, best->is_active);
+ netdev_dbg(bond->dev, "best ports %p slave %p %s\n",
+ best->lag_ports, best->slave,
+ best->slave ? best->slave->dev->name : "NULL");
+
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ agg = &(SLAVE_AD_INFO(slave)->aggregator);
+
+ netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
+ agg->aggregator_identifier, agg->num_of_ports,
+ agg->actor_oper_aggregator_key,
+ agg->partner_oper_aggregator_key,
+ agg->is_individual, agg->is_active);
+ }
+
+ /* check if any partner replys */
+ if (best->is_individual) {
+ net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
+ best->slave ?
+ best->slave->bond->dev->name : "NULL");
+ }
+
+ best->is_active = 1;
+ netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n",
+ best->aggregator_identifier);
+ netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
+ best->aggregator_identifier, best->num_of_ports,
+ best->actor_oper_aggregator_key,
+ best->partner_oper_aggregator_key,
+ best->is_individual, best->is_active);
+
+ /* disable the ports that were related to the former
+ * active_aggregator
+ */
+ if (active) {
+ for (port = active->lag_ports; port;
+ port = port->next_port_in_aggregator) {
+ __disable_port(port);
+ }
+ }
+ /* Slave array needs update. */
+ *update_slave_arr = true;
+ }
+
+ /* if the selected aggregator is of join individuals
+ * (partner_system is NULL), enable their ports
+ */
+ active = __get_active_agg(origin);
+
+ if (active) {
+ if (!__agg_has_partner(active)) {
+ for (port = active->lag_ports; port;
+ port = port->next_port_in_aggregator) {
+ __enable_port(port);
+ }
+ }
+ }
+
+ rcu_read_unlock();
+
+ bond_3ad_set_carrier(bond);
+}
+
+/**
+ * ad_clear_agg - clear a given aggregator's parameters
+ * @aggregator: the aggregator we're looking at
+ */
+static void ad_clear_agg(struct aggregator *aggregator)
+{
+ if (aggregator) {
+ aggregator->is_individual = false;
+ aggregator->actor_admin_aggregator_key = 0;
+ aggregator->actor_oper_aggregator_key = 0;
+ eth_zero_addr(aggregator->partner_system.mac_addr_value);
+ aggregator->partner_system_priority = 0;
+ aggregator->partner_oper_aggregator_key = 0;
+ aggregator->receive_state = 0;
+ aggregator->transmit_state = 0;
+ aggregator->lag_ports = NULL;
+ aggregator->is_active = 0;
+ aggregator->num_of_ports = 0;
+ pr_debug("LAG %d was cleared\n",
+ aggregator->aggregator_identifier);
+ }
+}
+
+/**
+ * ad_initialize_agg - initialize a given aggregator's parameters
+ * @aggregator: the aggregator we're looking at
+ */
+static void ad_initialize_agg(struct aggregator *aggregator)
+{
+ if (aggregator) {
+ ad_clear_agg(aggregator);
+
+ eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value);
+ aggregator->aggregator_identifier = 0;
+ aggregator->slave = NULL;
+ }
+}
+
+/**
+ * ad_initialize_port - initialize a given port's parameters
+ * @aggregator: the aggregator we're looking at
+ * @lacp_fast: boolean. whether fast periodic should be used
+ */
+static void ad_initialize_port(struct port *port, int lacp_fast)
+{
+ static const struct port_params tmpl = {
+ .system_priority = 0xffff,
+ .key = 1,
+ .port_number = 1,
+ .port_priority = 0xff,
+ .port_state = 1,
+ };
+ static const struct lacpdu lacpdu = {
+ .subtype = 0x01,
+ .version_number = 0x01,
+ .tlv_type_actor_info = 0x01,
+ .actor_information_length = 0x14,
+ .tlv_type_partner_info = 0x02,
+ .partner_information_length = 0x14,
+ .tlv_type_collector_info = 0x03,
+ .collector_information_length = 0x10,
+ .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
+ };
+
+ if (port) {
+ port->actor_port_priority = 0xff;
+ port->actor_port_aggregator_identifier = 0;
+ port->ntt = false;
+ port->actor_admin_port_state = AD_STATE_AGGREGATION |
+ AD_STATE_LACP_ACTIVITY;
+ port->actor_oper_port_state = AD_STATE_AGGREGATION |
+ AD_STATE_LACP_ACTIVITY;
+
+ if (lacp_fast)
+ port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
+
+ memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
+ memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
+
+ port->is_enabled = true;
+ /* private parameters */
+ port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;
+ port->sm_rx_state = 0;
+ port->sm_rx_timer_counter = 0;
+ port->sm_periodic_state = 0;
+ port->sm_periodic_timer_counter = 0;
+ port->sm_mux_state = 0;
+ port->sm_mux_timer_counter = 0;
+ port->sm_tx_state = 0;
+ port->aggregator = NULL;
+ port->next_port_in_aggregator = NULL;
+ port->transaction_id = 0;
+
+ port->sm_churn_actor_timer_counter = 0;
+ port->sm_churn_actor_state = 0;
+ port->churn_actor_count = 0;
+ port->sm_churn_partner_timer_counter = 0;
+ port->sm_churn_partner_state = 0;
+ port->churn_partner_count = 0;
+
+ memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
+ }
+}
+
+/**
+ * ad_enable_collecting_distributing - enable a port's transmit/receive
+ * @port: the port we're looking at
+ * @update_slave_arr: Does slave array need update?
+ *
+ * Enable @port if it's in an active aggregator
+ */
+static void ad_enable_collecting_distributing(struct port *port,
+ bool *update_slave_arr)
+{
+ if (port->aggregator->is_active) {
+ pr_debug("Enabling port %d(LAG %d)\n",
+ port->actor_port_number,
+ port->aggregator->aggregator_identifier);
+ __enable_port(port);
+ /* Slave array needs update */
+ *update_slave_arr = true;
+ }
+}
+
+/**
+ * ad_disable_collecting_distributing - disable a port's transmit/receive
+ * @port: the port we're looking at
+ * @update_slave_arr: Does slave array need update?
+ */
+static void ad_disable_collecting_distributing(struct port *port,
+ bool *update_slave_arr)
+{
+ if (port->aggregator &&
+ !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
+ &(null_mac_addr))) {
+ pr_debug("Disabling port %d(LAG %d)\n",
+ port->actor_port_number,
+ port->aggregator->aggregator_identifier);
+ __disable_port(port);
+ /* Slave array needs an update */
+ *update_slave_arr = true;
+ }
+}
+
+/**
+ * ad_marker_info_received - handle receive of a Marker information frame
+ * @marker_info: Marker info received
+ * @port: the port we're looking at
+ */
+static void ad_marker_info_received(struct bond_marker *marker_info,
+ struct port *port)
+{
+ struct bond_marker marker;
+
+ /* copy the received marker data to the response marker */
+ memcpy(&marker, marker_info, sizeof(struct bond_marker));
+ /* change the marker subtype to marker response */
+ marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
+
+ /* send the marker response */
+ if (ad_marker_send(port, &marker) >= 0) {
+ pr_debug("Sent Marker Response on port %d\n",
+ port->actor_port_number);
+ }
+}
+
+/**
+ * ad_marker_response_received - handle receive of a marker response frame
+ * @marker: marker PDU received
+ * @port: the port we're looking at
+ *
+ * This function does nothing since we decided not to implement send and handle
+ * response for marker PDU's, in this stage, but only to respond to marker
+ * information.
+ */
+static void ad_marker_response_received(struct bond_marker *marker,
+ struct port *port)
+{
+ /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
+}
+
+/* ========= AD exported functions to the main bonding code ========= */
+
+/* Check aggregators status in team every T seconds */
+#define AD_AGGREGATOR_SELECTION_TIMER 8
+
+/**
+ * bond_3ad_initiate_agg_selection - initate aggregator selection
+ * @bond: bonding struct
+ *
+ * Set the aggregation selection timer, to initiate an agg selection in
+ * the very near future. Called during first initialization, and during
+ * any down to up transitions of the bond.
+ */
+void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
+{
+ BOND_AD_INFO(bond).agg_select_timer = timeout;
+}
+
+/**
+ * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
+ * @bond: bonding struct to work on
+ * @tick_resolution: tick duration (millisecond resolution)
+ *
+ * Can be called only after the mac address of the bond is set.
+ */
+void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
+{
+ /* check that the bond is not initialized yet */
+ if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
+ bond->dev->dev_addr)) {
+
+ BOND_AD_INFO(bond).aggregator_identifier = 0;
+
+ BOND_AD_INFO(bond).system.sys_priority =
+ bond->params.ad_actor_sys_prio;
+ if (is_zero_ether_addr(bond->params.ad_actor_system))
+ BOND_AD_INFO(bond).system.sys_mac_addr =
+ *((struct mac_addr *)bond->dev->dev_addr);
+ else
+ BOND_AD_INFO(bond).system.sys_mac_addr =
+ *((struct mac_addr *)bond->params.ad_actor_system);
+
+ /* initialize how many times this module is called in one
+ * second (should be about every 100ms)
+ */
+ ad_ticks_per_sec = tick_resolution;
+
+ bond_3ad_initiate_agg_selection(bond,
+ AD_AGGREGATOR_SELECTION_TIMER *
+ ad_ticks_per_sec);
+ }
+}
+
+/**
+ * bond_3ad_bind_slave - initialize a slave's port
+ * @slave: slave struct to work on
+ *
+ * Returns: 0 on success
+ * < 0 on error
+ */
+void bond_3ad_bind_slave(struct slave *slave)
+{
+ struct bonding *bond = bond_get_bond_by_slave(slave);
+ struct port *port;
+ struct aggregator *aggregator;
+
+ /* check that the slave has not been initialized yet. */
+ if (SLAVE_AD_INFO(slave)->port.slave != slave) {
+
+ /* port initialization */
+ port = &(SLAVE_AD_INFO(slave)->port);
+
+ ad_initialize_port(port, bond->params.lacp_fast);
+
+ port->slave = slave;
+ port->actor_port_number = SLAVE_AD_INFO(slave)->id;
+ /* key is determined according to the link speed, duplex and
+ * user key
+ */
+ port->actor_admin_port_key = bond->params.ad_user_port_key << 6;
+ ad_update_actor_keys(port, false);
+ /* actor system is the bond's system */
+ __ad_actor_update_port(port);
+ /* tx timer(to verify that no more than MAX_TX_IN_SECOND
+ * lacpdu's are sent in one second)
+ */
+ port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
+
+ __disable_port(port);
+
+ /* aggregator initialization */
+ aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
+
+ ad_initialize_agg(aggregator);
+
+ aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
+ aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
+ aggregator->slave = slave;
+ aggregator->is_active = 0;
+ aggregator->num_of_ports = 0;
+ }
+}
+
+/**
+ * bond_3ad_unbind_slave - deinitialize a slave's port
+ * @slave: slave struct to work on
+ *
+ * Search for the aggregator that is related to this port, remove the
+ * aggregator and assign another aggregator for other port related to it
+ * (if any), and remove the port.
+ */
+void bond_3ad_unbind_slave(struct slave *slave)
+{
+ struct port *port, *prev_port, *temp_port;
+ struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
+ int select_new_active_agg = 0;
+ struct bonding *bond = slave->bond;
+ struct slave *slave_iter;
+ struct list_head *iter;
+ bool dummy_slave_update; /* Ignore this value as caller updates array */
+
+ /* Sync against bond_3ad_state_machine_handler() */
+ spin_lock_bh(&bond->mode_lock);
+ aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
+ port = &(SLAVE_AD_INFO(slave)->port);
+
+ /* if slave is null, the whole port is not initialized */
+ if (!port->slave) {
+ netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n",
+ slave->dev->name);
+ goto out;
+ }
+
+ netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n",
+ aggregator->aggregator_identifier);
+
+ /* Tell the partner that this port is not suitable for aggregation */
+ port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
+ port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
+ port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
+ port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
+ __update_lacpdu_from_port(port);
+ ad_lacpdu_send(port);
+
+ /* check if this aggregator is occupied */
+ if (aggregator->lag_ports) {
+ /* check if there are other ports related to this aggregator
+ * except the port related to this slave(thats ensure us that
+ * there is a reason to search for new aggregator, and that we
+ * will find one
+ */
+ if ((aggregator->lag_ports != port) ||
+ (aggregator->lag_ports->next_port_in_aggregator)) {
+ /* find new aggregator for the related port(s) */
+ bond_for_each_slave(bond, slave_iter, iter) {
+ new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
+ /* if the new aggregator is empty, or it is
+ * connected to our port only
+ */
+ if (!new_aggregator->lag_ports ||
+ ((new_aggregator->lag_ports == port) &&
+ !new_aggregator->lag_ports->next_port_in_aggregator))
+ break;
+ }
+ if (!slave_iter)
+ new_aggregator = NULL;
+
+ /* if new aggregator found, copy the aggregator's
+ * parameters and connect the related lag_ports to the
+ * new aggregator
+ */
+ if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
+ netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
+ aggregator->aggregator_identifier,
+ new_aggregator->aggregator_identifier);
+
+ if ((new_aggregator->lag_ports == port) &&
+ new_aggregator->is_active) {
+ netdev_info(bond->dev, "Removing an active aggregator\n");
+ select_new_active_agg = 1;
+ }
+
+ new_aggregator->is_individual = aggregator->is_individual;
+ new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
+ new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
+ new_aggregator->partner_system = aggregator->partner_system;
+ new_aggregator->partner_system_priority = aggregator->partner_system_priority;
+ new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
+ new_aggregator->receive_state = aggregator->receive_state;
+ new_aggregator->transmit_state = aggregator->transmit_state;
+ new_aggregator->lag_ports = aggregator->lag_ports;
+ new_aggregator->is_active = aggregator->is_active;
+ new_aggregator->num_of_ports = aggregator->num_of_ports;
+
+ /* update the information that is written on
+ * the ports about the aggregator
+ */
+ for (temp_port = aggregator->lag_ports; temp_port;
+ temp_port = temp_port->next_port_in_aggregator) {
+ temp_port->aggregator = new_aggregator;
+ temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
+ }
+
+ ad_clear_agg(aggregator);
+
+ if (select_new_active_agg)
+ ad_agg_selection_logic(__get_first_agg(port),
+ &dummy_slave_update);
+ } else {
+ netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
+ }
+ } else {
+ /* in case that the only port related to this
+ * aggregator is the one we want to remove
+ */
+ select_new_active_agg = aggregator->is_active;
+ ad_clear_agg(aggregator);
+ if (select_new_active_agg) {
+ netdev_info(bond->dev, "Removing an active aggregator\n");
+ /* select new active aggregator */
+ temp_aggregator = __get_first_agg(port);
+ if (temp_aggregator)
+ ad_agg_selection_logic(temp_aggregator,
+ &dummy_slave_update);
+ }
+ }
+ }
+
+ netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number);
+
+ /* find the aggregator that this port is connected to */
+ bond_for_each_slave(bond, slave_iter, iter) {
+ temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
+ prev_port = NULL;
+ /* search the port in the aggregator's related ports */
+ for (temp_port = temp_aggregator->lag_ports; temp_port;
+ prev_port = temp_port,
+ temp_port = temp_port->next_port_in_aggregator) {
+ if (temp_port == port) {
+ /* the aggregator found - detach the port from
+ * this aggregator
+ */
+ if (prev_port)
+ prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
+ else
+ temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
+ temp_aggregator->num_of_ports--;
+ if (__agg_active_ports(temp_aggregator) == 0) {
+ select_new_active_agg = temp_aggregator->is_active;
+ ad_clear_agg(temp_aggregator);
+ if (select_new_active_agg) {
+ netdev_info(bond->dev, "Removing an active aggregator\n");
+ /* select new active aggregator */
+ ad_agg_selection_logic(__get_first_agg(port),
+ &dummy_slave_update);
+ }
+ }
+ break;
+ }
+ }
+ }
+ port->slave = NULL;
+
+out:
+ spin_unlock_bh(&bond->mode_lock);
+}
+
+/**
+ * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports
+ * @bond: bonding struct to work on
+ *
+ * If an ad_actor setting gets changed we need to update the individual port
+ * settings so the bond device will use the new values when it gets upped.
+ */
+void bond_3ad_update_ad_actor_settings(struct bonding *bond)
+{
+ struct list_head *iter;
+ struct slave *slave;
+
+ ASSERT_RTNL();
+
+ BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio;
+ if (is_zero_ether_addr(bond->params.ad_actor_system))
+ BOND_AD_INFO(bond).system.sys_mac_addr =
+ *((struct mac_addr *)bond->dev->dev_addr);
+ else
+ BOND_AD_INFO(bond).system.sys_mac_addr =
+ *((struct mac_addr *)bond->params.ad_actor_system);
+
+ spin_lock_bh(&bond->mode_lock);
+ bond_for_each_slave(bond, slave, iter) {
+ struct port *port = &(SLAVE_AD_INFO(slave))->port;
+
+ __ad_actor_update_port(port);
+ port->ntt = true;
+ }
+ spin_unlock_bh(&bond->mode_lock);
+}
+
+/**
+ * bond_3ad_state_machine_handler - handle state machines timeout
+ * @bond: bonding struct to work on
+ *
+ * The state machine handling concept in this module is to check every tick
+ * which state machine should operate any function. The execution order is
+ * round robin, so when we have an interaction between state machines, the
+ * reply of one to each other might be delayed until next tick.
+ *
+ * This function also complete the initialization when the agg_select_timer
+ * times out, and it selects an aggregator for the ports that are yet not
+ * related to any aggregator, and selects the active aggregator for a bond.
+ */
+void bond_3ad_state_machine_handler(struct work_struct *work)
+{
+ struct bonding *bond = container_of(work, struct bonding,
+ ad_work.work);
+ struct aggregator *aggregator;
+ struct list_head *iter;
+ struct slave *slave;
+ struct port *port;
+ bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
+ bool update_slave_arr = false;
+
+ /* Lock to protect data accessed by all (e.g., port->sm_vars) and
+ * against running with bond_3ad_unbind_slave. ad_rx_machine may run
+ * concurrently due to incoming LACPDU as well.
+ */
+ spin_lock_bh(&bond->mode_lock);
+ rcu_read_lock();
+
+ /* check if there are any slaves */
+ if (!bond_has_slaves(bond))
+ goto re_arm;
+
+ /* check if agg_select_timer timer after initialize is timed out */
+ if (BOND_AD_INFO(bond).agg_select_timer &&
+ !(--BOND_AD_INFO(bond).agg_select_timer)) {
+ slave = bond_first_slave_rcu(bond);
+ port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
+
+ /* select the active aggregator for the bond */
+ if (port) {
+ if (!port->slave) {
+ net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
+ bond->dev->name);
+ goto re_arm;
+ }
+
+ aggregator = __get_first_agg(port);
+ ad_agg_selection_logic(aggregator, &update_slave_arr);
+ }
+ bond_3ad_set_carrier(bond);
+ }
+
+ /* for each port run the state machines */
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ port = &(SLAVE_AD_INFO(slave)->port);
+ if (!port->slave) {
+ net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
+ bond->dev->name);
+ goto re_arm;
+ }
+
+ ad_rx_machine(NULL, port);
+ ad_periodic_machine(port);
+ ad_port_selection_logic(port, &update_slave_arr);
+ ad_mux_machine(port, &update_slave_arr);
+ ad_tx_machine(port);
+ ad_churn_machine(port);
+
+ /* turn off the BEGIN bit, since we already handled it */
+ if (port->sm_vars & AD_PORT_BEGIN)
+ port->sm_vars &= ~AD_PORT_BEGIN;
+ }
+
+re_arm:
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ if (slave->should_notify) {
+ should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
+ break;
+ }
+ }
+ rcu_read_unlock();
+ spin_unlock_bh(&bond->mode_lock);
+
+ if (update_slave_arr)
+ bond_slave_arr_work_rearm(bond, 0);
+
+ if (should_notify_rtnl && rtnl_trylock()) {
+ bond_slave_state_notify(bond);
+ rtnl_unlock();
+ }
+ queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
+}
+
+/**
+ * bond_3ad_rx_indication - handle a received frame
+ * @lacpdu: received lacpdu
+ * @slave: slave struct to work on
+ * @length: length of the data received
+ *
+ * It is assumed that frames that were sent on this NIC don't returned as new
+ * received frames (loopback). Since only the payload is given to this
+ * function, it check for loopback.
+ */
+static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
+ u16 length)
+{
+ struct port *port;
+ int ret = RX_HANDLER_ANOTHER;
+
+ if (length >= sizeof(struct lacpdu)) {
+
+ port = &(SLAVE_AD_INFO(slave)->port);
+
+ if (!port->slave) {
+ net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
+ slave->dev->name, slave->bond->dev->name);
+ return ret;
+ }
+
+ switch (lacpdu->subtype) {
+ case AD_TYPE_LACPDU:
+ ret = RX_HANDLER_CONSUMED;
+ netdev_dbg(slave->bond->dev,
+ "Received LACPDU on port %d slave %s\n",
+ port->actor_port_number,
+ slave->dev->name);
+ /* Protect against concurrent state machines */
+ spin_lock(&slave->bond->mode_lock);
+ ad_rx_machine(lacpdu, port);
+ spin_unlock(&slave->bond->mode_lock);
+ break;
+
+ case AD_TYPE_MARKER:
+ ret = RX_HANDLER_CONSUMED;
+ /* No need to convert fields to Little Endian since we
+ * don't use the marker's fields.
+ */
+
+ switch (((struct bond_marker *)lacpdu)->tlv_type) {
+ case AD_MARKER_INFORMATION_SUBTYPE:
+ netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n",
+ port->actor_port_number);
+ ad_marker_info_received((struct bond_marker *)lacpdu, port);
+ break;
+
+ case AD_MARKER_RESPONSE_SUBTYPE:
+ netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n",
+ port->actor_port_number);
+ ad_marker_response_received((struct bond_marker *)lacpdu, port);
+ break;
+
+ default:
+ netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n",
+ port->actor_port_number);
+ }
+ }
+ }
+ return ret;
+}
+
+/**
+ * ad_update_actor_keys - Update the oper / admin keys for a port based on
+ * its current speed and duplex settings.
+ *
+ * @port: the port we'are looking at
+ * @reset: Boolean to just reset the speed and the duplex part of the key
+ *
+ * The logic to change the oper / admin keys is:
+ * (a) A full duplex port can participate in LACP with partner.
+ * (b) When the speed is changed, LACP need to be reinitiated.
+ */
+static void ad_update_actor_keys(struct port *port, bool reset)
+{
+ u8 duplex = 0;
+ u16 ospeed = 0, speed = 0;
+ u16 old_oper_key = port->actor_oper_port_key;
+
+ port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);
+ if (!reset) {
+ speed = __get_link_speed(port);
+ ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;
+ duplex = __get_duplex(port);
+ port->actor_admin_port_key |= (speed << 1) | duplex;
+ }
+ port->actor_oper_port_key = port->actor_admin_port_key;
+
+ if (old_oper_key != port->actor_oper_port_key) {
+ /* Only 'duplex' port participates in LACP */
+ if (duplex)
+ port->sm_vars |= AD_PORT_LACP_ENABLED;
+ else
+ port->sm_vars &= ~AD_PORT_LACP_ENABLED;
+
+ if (!reset) {
+ if (!speed) {
+ netdev_err(port->slave->dev,
+ "speed changed to 0 for port %s",
+ port->slave->dev->name);
+ } else if (duplex && ospeed != speed) {
+ /* Speed change restarts LACP state-machine */
+ port->sm_vars |= AD_PORT_BEGIN;
+ }
+ }
+ }
+}
+
+/**
+ * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
+ * change indication
+ *
+ * @slave: slave struct to work on
+ *
+ * Handle reselection of aggregator (if needed) for this port.
+ */
+void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)
+{
+ struct port *port;
+
+ port = &(SLAVE_AD_INFO(slave)->port);
+
+ /* if slave is null, the whole port is not initialized */
+ if (!port->slave) {
+ netdev_warn(slave->bond->dev,
+ "speed/duplex changed for uninitialized port %s\n",
+ slave->dev->name);
+ return;
+ }
+
+ spin_lock_bh(&slave->bond->mode_lock);
+ ad_update_actor_keys(port, false);
+ spin_unlock_bh(&slave->bond->mode_lock);
+ netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/duplex\n",
+ port->actor_port_number, slave->dev->name);
+}
+
+/**
+ * bond_3ad_handle_link_change - handle a slave's link status change indication
+ * @slave: slave struct to work on
+ * @status: whether the link is now up or down
+ *
+ * Handle reselection of aggregator (if needed) for this port.
+ */
+void bond_3ad_handle_link_change(struct slave *slave, char link)
+{
+ struct aggregator *agg;
+ struct port *port;
+ bool dummy;
+
+ port = &(SLAVE_AD_INFO(slave)->port);
+
+ /* if slave is null, the whole port is not initialized */
+ if (!port->slave) {
+ netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n",
+ slave->dev->name);
+ return;
+ }
+
+ spin_lock_bh(&slave->bond->mode_lock);
+ /* on link down we are zeroing duplex and speed since
+ * some of the adaptors(ce1000.lan) report full duplex/speed
+ * instead of N/A(duplex) / 0(speed).
+ *
+ * on link up we are forcing recheck on the duplex and speed since
+ * some of he adaptors(ce1000.lan) report.
+ */
+ if (link == BOND_LINK_UP) {
+ port->is_enabled = true;
+ ad_update_actor_keys(port, false);
+ } else {
+ /* link has failed */
+ port->is_enabled = false;
+ ad_update_actor_keys(port, true);
+ }
+ agg = __get_first_agg(port);
+ ad_agg_selection_logic(agg, &dummy);
+
+ spin_unlock_bh(&slave->bond->mode_lock);
+
+ netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n",
+ port->actor_port_number,
+ link == BOND_LINK_UP ? "UP" : "DOWN");
+
+ /* RTNL is held and mode_lock is released so it's safe
+ * to update slave_array here.
+ */
+ bond_update_slave_arr(slave->bond, NULL);
+}
+
+/**
+ * bond_3ad_set_carrier - set link state for bonding master
+ * @bond - bonding structure
+ *
+ * if we have an active aggregator, we're up, if not, we're down.
+ * Presumes that we cannot have an active aggregator if there are
+ * no slaves with link up.
+ *
+ * This behavior complies with IEEE 802.3 section 43.3.9.
+ *
+ * Called by bond_set_carrier(). Return zero if carrier state does not
+ * change, nonzero if it does.
+ */
+int bond_3ad_set_carrier(struct bonding *bond)
+{
+ struct aggregator *active;
+ struct slave *first_slave;
+ int ret = 1;
+
+ rcu_read_lock();
+ first_slave = bond_first_slave_rcu(bond);
+ if (!first_slave) {
+ ret = 0;
+ goto out;
+ }
+ active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
+ if (active) {
+ /* are enough slaves available to consider link up? */
+ if (__agg_active_ports(active) < bond->params.min_links) {
+ if (netif_carrier_ok(bond->dev)) {
+ netif_carrier_off(bond->dev);
+ goto out;
+ }
+ } else if (!netif_carrier_ok(bond->dev)) {
+ netif_carrier_on(bond->dev);
+ goto out;
+ }
+ } else if (netif_carrier_ok(bond->dev)) {
+ netif_carrier_off(bond->dev);
+ }
+out:
+ rcu_read_unlock();
+ return ret;
+}
+
+/**
+ * __bond_3ad_get_active_agg_info - get information of the active aggregator
+ * @bond: bonding struct to work on
+ * @ad_info: ad_info struct to fill with the bond's info
+ *
+ * Returns: 0 on success
+ * < 0 on error
+ */
+int __bond_3ad_get_active_agg_info(struct bonding *bond,
+ struct ad_info *ad_info)
+{
+ struct aggregator *aggregator = NULL;
+ struct list_head *iter;
+ struct slave *slave;
+ struct port *port;
+
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ port = &(SLAVE_AD_INFO(slave)->port);
+ if (port->aggregator && port->aggregator->is_active) {
+ aggregator = port->aggregator;
+ break;
+ }
+ }
+
+ if (!aggregator)
+ return -1;
+
+ ad_info->aggregator_id = aggregator->aggregator_identifier;
+ ad_info->ports = __agg_active_ports(aggregator);
+ ad_info->actor_key = aggregator->actor_oper_aggregator_key;
+ ad_info->partner_key = aggregator->partner_oper_aggregator_key;
+ ether_addr_copy(ad_info->partner_system,
+ aggregator->partner_system.mac_addr_value);
+ return 0;
+}
+
+int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
+{
+ int ret;
+
+ rcu_read_lock();
+ ret = __bond_3ad_get_active_agg_info(bond, ad_info);
+ rcu_read_unlock();
+
+ return ret;
+}
+
+int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
+ struct slave *slave)
+{
+ struct lacpdu *lacpdu, _lacpdu;
+
+ if (skb->protocol != PKT_TYPE_LACPDU)
+ return RX_HANDLER_ANOTHER;
+
+ if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
+ return RX_HANDLER_ANOTHER;
+
+ lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
+ if (!lacpdu)
+ return RX_HANDLER_ANOTHER;
+
+ return bond_3ad_rx_indication(lacpdu, slave, skb->len);
+}
+
+/**
+ * bond_3ad_update_lacp_rate - change the lacp rate
+ * @bond - bonding struct
+ *
+ * When modify lacp_rate parameter via sysfs,
+ * update actor_oper_port_state of each port.
+ *
+ * Hold bond->mode_lock,
+ * so we can modify port->actor_oper_port_state,
+ * no matter bond is up or down.
+ */
+void bond_3ad_update_lacp_rate(struct bonding *bond)
+{
+ struct port *port = NULL;
+ struct list_head *iter;
+ struct slave *slave;
+ int lacp_fast;
+
+ lacp_fast = bond->params.lacp_fast;
+ spin_lock_bh(&bond->mode_lock);
+ bond_for_each_slave(bond, slave, iter) {
+ port = &(SLAVE_AD_INFO(slave)->port);
+ if (lacp_fast)
+ port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
+ else
+ port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
+ }
+ spin_unlock_bh(&bond->mode_lock);
+}
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
new file mode 100644
index 0000000..e82108c
--- /dev/null
+++ b/drivers/net/bonding/bond_alb.c
@@ -0,0 +1,1806 @@
+/*
+ * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ */
+
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/pkt_sched.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/if_arp.h>
+#include <linux/if_ether.h>
+#include <linux/if_bonding.h>
+#include <linux/if_vlan.h>
+#include <linux/in.h>
+#include <net/ipx.h>
+#include <net/arp.h>
+#include <net/ipv6.h>
+#include <asm/byteorder.h>
+#include <net/bonding.h>
+#include <net/bond_alb.h>
+
+static const u8 mac_v6_allmcast[ETH_ALEN + 2] __long_aligned = {
+ 0x33, 0x33, 0x00, 0x00, 0x00, 0x01
+};
+static const int alb_delta_in_ticks = HZ / ALB_TIMER_TICKS_PER_SEC;
+
+#pragma pack(1)
+struct learning_pkt {
+ u8 mac_dst[ETH_ALEN];
+ u8 mac_src[ETH_ALEN];
+ __be16 type;
+ u8 padding[ETH_ZLEN - ETH_HLEN];
+};
+
+struct arp_pkt {
+ __be16 hw_addr_space;
+ __be16 prot_addr_space;
+ u8 hw_addr_len;
+ u8 prot_addr_len;
+ __be16 op_code;
+ u8 mac_src[ETH_ALEN]; /* sender hardware address */
+ __be32 ip_src; /* sender IP address */
+ u8 mac_dst[ETH_ALEN]; /* target hardware address */
+ __be32 ip_dst; /* target IP address */
+};
+#pragma pack()
+
+static inline struct arp_pkt *arp_pkt(const struct sk_buff *skb)
+{
+ return (struct arp_pkt *)skb_network_header(skb);
+}
+
+/* Forward declaration */
+static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[],
+ bool strict_match);
+static void rlb_purge_src_ip(struct bonding *bond, struct arp_pkt *arp);
+static void rlb_src_unlink(struct bonding *bond, u32 index);
+static void rlb_src_link(struct bonding *bond, u32 ip_src_hash,
+ u32 ip_dst_hash);
+
+static inline u8 _simple_hash(const u8 *hash_start, int hash_size)
+{
+ int i;
+ u8 hash = 0;
+
+ for (i = 0; i < hash_size; i++)
+ hash ^= hash_start[i];
+
+ return hash;
+}
+
+/*********************** tlb specific functions ***************************/
+
+static inline void tlb_init_table_entry(struct tlb_client_info *entry, int save_load)
+{
+ if (save_load) {
+ entry->load_history = 1 + entry->tx_bytes /
+ BOND_TLB_REBALANCE_INTERVAL;
+ entry->tx_bytes = 0;
+ }
+
+ entry->tx_slave = NULL;
+ entry->next = TLB_NULL_INDEX;
+ entry->prev = TLB_NULL_INDEX;
+}
+
+static inline void tlb_init_slave(struct slave *slave)
+{
+ SLAVE_TLB_INFO(slave).load = 0;
+ SLAVE_TLB_INFO(slave).head = TLB_NULL_INDEX;
+}
+
+static void __tlb_clear_slave(struct bonding *bond, struct slave *slave,
+ int save_load)
+{
+ struct tlb_client_info *tx_hash_table;
+ u32 index;
+
+ /* clear slave from tx_hashtbl */
+ tx_hash_table = BOND_ALB_INFO(bond).tx_hashtbl;
+
+ /* skip this if we've already freed the tx hash table */
+ if (tx_hash_table) {
+ index = SLAVE_TLB_INFO(slave).head;
+ while (index != TLB_NULL_INDEX) {
+ u32 next_index = tx_hash_table[index].next;
+ tlb_init_table_entry(&tx_hash_table[index], save_load);
+ index = next_index;
+ }
+ }
+
+ tlb_init_slave(slave);
+}
+
+static void tlb_clear_slave(struct bonding *bond, struct slave *slave,
+ int save_load)
+{
+ spin_lock_bh(&bond->mode_lock);
+ __tlb_clear_slave(bond, slave, save_load);
+ spin_unlock_bh(&bond->mode_lock);
+}
+
+/* Must be called before starting the monitor timer */
+static int tlb_initialize(struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ int size = TLB_HASH_TABLE_SIZE * sizeof(struct tlb_client_info);
+ struct tlb_client_info *new_hashtbl;
+ int i;
+
+ new_hashtbl = kzalloc(size, GFP_KERNEL);
+ if (!new_hashtbl)
+ return -ENOMEM;
+
+ spin_lock_bh(&bond->mode_lock);
+
+ bond_info->tx_hashtbl = new_hashtbl;
+
+ for (i = 0; i < TLB_HASH_TABLE_SIZE; i++)
+ tlb_init_table_entry(&bond_info->tx_hashtbl[i], 0);
+
+ spin_unlock_bh(&bond->mode_lock);
+
+ return 0;
+}
+
+/* Must be called only after all slaves have been released */
+static void tlb_deinitialize(struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+
+ spin_lock_bh(&bond->mode_lock);
+
+ kfree(bond_info->tx_hashtbl);
+ bond_info->tx_hashtbl = NULL;
+
+ spin_unlock_bh(&bond->mode_lock);
+}
+
+static long long compute_gap(struct slave *slave)
+{
+ return (s64) (slave->speed << 20) - /* Convert to Megabit per sec */
+ (s64) (SLAVE_TLB_INFO(slave).load << 3); /* Bytes to bits */
+}
+
+static struct slave *tlb_get_least_loaded_slave(struct bonding *bond)
+{
+ struct slave *slave, *least_loaded;
+ struct list_head *iter;
+ long long max_gap;
+
+ least_loaded = NULL;
+ max_gap = LLONG_MIN;
+
+ /* Find the slave with the largest gap */
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ if (bond_slave_can_tx(slave)) {
+ long long gap = compute_gap(slave);
+
+ if (max_gap < gap) {
+ least_loaded = slave;
+ max_gap = gap;
+ }
+ }
+ }
+
+ return least_loaded;
+}
+
+static struct slave *__tlb_choose_channel(struct bonding *bond, u32 hash_index,
+ u32 skb_len)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct tlb_client_info *hash_table;
+ struct slave *assigned_slave;
+
+ hash_table = bond_info->tx_hashtbl;
+ assigned_slave = hash_table[hash_index].tx_slave;
+ if (!assigned_slave) {
+ assigned_slave = tlb_get_least_loaded_slave(bond);
+
+ if (assigned_slave) {
+ struct tlb_slave_info *slave_info =
+ &(SLAVE_TLB_INFO(assigned_slave));
+ u32 next_index = slave_info->head;
+
+ hash_table[hash_index].tx_slave = assigned_slave;
+ hash_table[hash_index].next = next_index;
+ hash_table[hash_index].prev = TLB_NULL_INDEX;
+
+ if (next_index != TLB_NULL_INDEX)
+ hash_table[next_index].prev = hash_index;
+
+ slave_info->head = hash_index;
+ slave_info->load +=
+ hash_table[hash_index].load_history;
+ }
+ }
+
+ if (assigned_slave)
+ hash_table[hash_index].tx_bytes += skb_len;
+
+ return assigned_slave;
+}
+
+static struct slave *tlb_choose_channel(struct bonding *bond, u32 hash_index,
+ u32 skb_len)
+{
+ struct slave *tx_slave;
+
+ /* We don't need to disable softirq here, becase
+ * tlb_choose_channel() is only called by bond_alb_xmit()
+ * which already has softirq disabled.
+ */
+ spin_lock(&bond->mode_lock);
+ tx_slave = __tlb_choose_channel(bond, hash_index, skb_len);
+ spin_unlock(&bond->mode_lock);
+
+ return tx_slave;
+}
+
+/*********************** rlb specific functions ***************************/
+
+/* when an ARP REPLY is received from a client update its info
+ * in the rx_hashtbl
+ */
+static void rlb_update_entry_from_arp(struct bonding *bond, struct arp_pkt *arp)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct rlb_client_info *client_info;
+ u32 hash_index;
+
+ spin_lock_bh(&bond->mode_lock);
+
+ hash_index = _simple_hash((u8 *)&(arp->ip_src), sizeof(arp->ip_src));
+ client_info = &(bond_info->rx_hashtbl[hash_index]);
+
+ if ((client_info->assigned) &&
+ (client_info->ip_src == arp->ip_dst) &&
+ (client_info->ip_dst == arp->ip_src) &&
+ (!ether_addr_equal_64bits(client_info->mac_dst, arp->mac_src))) {
+ /* update the clients MAC address */
+ ether_addr_copy(client_info->mac_dst, arp->mac_src);
+ client_info->ntt = 1;
+ bond_info->rx_ntt = 1;
+ }
+
+ spin_unlock_bh(&bond->mode_lock);
+}
+
+static int rlb_arp_recv(const struct sk_buff *skb, struct bonding *bond,
+ struct slave *slave)
+{
+ struct arp_pkt *arp, _arp;
+
+ if (skb->protocol != cpu_to_be16(ETH_P_ARP))
+ goto out;
+
+ arp = skb_header_pointer(skb, 0, sizeof(_arp), &_arp);
+ if (!arp)
+ goto out;
+
+ /* We received an ARP from arp->ip_src.
+ * We might have used this IP address previously (on the bonding host
+ * itself or on a system that is bridged together with the bond).
+ * However, if arp->mac_src is different than what is stored in
+ * rx_hashtbl, some other host is now using the IP and we must prevent
+ * sending out client updates with this IP address and the old MAC
+ * address.
+ * Clean up all hash table entries that have this address as ip_src but
+ * have a different mac_src.
+ */
+ rlb_purge_src_ip(bond, arp);
+
+ if (arp->op_code == htons(ARPOP_REPLY)) {
+ /* update rx hash table for this ARP */
+ rlb_update_entry_from_arp(bond, arp);
+ netdev_dbg(bond->dev, "Server received an ARP Reply from client\n");
+ }
+out:
+ return RX_HANDLER_ANOTHER;
+}
+
+/* Caller must hold rcu_read_lock() */
+static struct slave *__rlb_next_rx_slave(struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct slave *before = NULL, *rx_slave = NULL, *slave;
+ struct list_head *iter;
+ bool found = false;
+
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ if (!bond_slave_can_tx(slave))
+ continue;
+ if (!found) {
+ if (!before || before->speed < slave->speed)
+ before = slave;
+ } else {
+ if (!rx_slave || rx_slave->speed < slave->speed)
+ rx_slave = slave;
+ }
+ if (slave == bond_info->rx_slave)
+ found = true;
+ }
+ /* we didn't find anything after the current or we have something
+ * better before and up to the current slave
+ */
+ if (!rx_slave || (before && rx_slave->speed < before->speed))
+ rx_slave = before;
+
+ if (rx_slave)
+ bond_info->rx_slave = rx_slave;
+
+ return rx_slave;
+}
+
+/* Caller must hold RTNL, rcu_read_lock is obtained only to silence checkers */
+static struct slave *rlb_next_rx_slave(struct bonding *bond)
+{
+ struct slave *rx_slave;
+
+ ASSERT_RTNL();
+
+ rcu_read_lock();
+ rx_slave = __rlb_next_rx_slave(bond);
+ rcu_read_unlock();
+
+ return rx_slave;
+}
+
+/* teach the switch the mac of a disabled slave
+ * on the primary for fault tolerance
+ *
+ * Caller must hold RTNL
+ */
+static void rlb_teach_disabled_mac_on_primary(struct bonding *bond, u8 addr[])
+{
+ struct slave *curr_active = rtnl_dereference(bond->curr_active_slave);
+
+ if (!curr_active)
+ return;
+
+ if (!bond->alb_info.primary_is_promisc) {
+ if (!dev_set_promiscuity(curr_active->dev, 1))
+ bond->alb_info.primary_is_promisc = 1;
+ else
+ bond->alb_info.primary_is_promisc = 0;
+ }
+
+ bond->alb_info.rlb_promisc_timeout_counter = 0;
+
+ alb_send_learning_packets(curr_active, addr, true);
+}
+
+/* slave being removed should not be active at this point
+ *
+ * Caller must hold rtnl.
+ */
+static void rlb_clear_slave(struct bonding *bond, struct slave *slave)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct rlb_client_info *rx_hash_table;
+ u32 index, next_index;
+
+ /* clear slave from rx_hashtbl */
+ spin_lock_bh(&bond->mode_lock);
+
+ rx_hash_table = bond_info->rx_hashtbl;
+ index = bond_info->rx_hashtbl_used_head;
+ for (; index != RLB_NULL_INDEX; index = next_index) {
+ next_index = rx_hash_table[index].used_next;
+ if (rx_hash_table[index].slave == slave) {
+ struct slave *assigned_slave = rlb_next_rx_slave(bond);
+
+ if (assigned_slave) {
+ rx_hash_table[index].slave = assigned_slave;
+ if (is_valid_ether_addr(rx_hash_table[index].mac_dst)) {
+ bond_info->rx_hashtbl[index].ntt = 1;
+ bond_info->rx_ntt = 1;
+ /* A slave has been removed from the
+ * table because it is either disabled
+ * or being released. We must retry the
+ * update to avoid clients from not
+ * being updated & disconnecting when
+ * there is stress
+ */
+ bond_info->rlb_update_retry_counter =
+ RLB_UPDATE_RETRY;
+ }
+ } else { /* there is no active slave */
+ rx_hash_table[index].slave = NULL;
+ }
+ }
+ }
+
+ spin_unlock_bh(&bond->mode_lock);
+
+ if (slave != rtnl_dereference(bond->curr_active_slave))
+ rlb_teach_disabled_mac_on_primary(bond, slave->dev->dev_addr);
+}
+
+static void rlb_update_client(struct rlb_client_info *client_info)
+{
+ int i;
+
+ if (!client_info->slave || !is_valid_ether_addr(client_info->mac_dst))
+ return;
+
+ for (i = 0; i < RLB_ARP_BURST_SIZE; i++) {
+ struct sk_buff *skb;
+
+ skb = arp_create(ARPOP_REPLY, ETH_P_ARP,
+ client_info->ip_dst,
+ client_info->slave->dev,
+ client_info->ip_src,
+ client_info->mac_dst,
+ client_info->slave->dev->dev_addr,
+ client_info->mac_dst);
+ if (!skb) {
+ netdev_err(client_info->slave->bond->dev,
+ "failed to create an ARP packet\n");
+ continue;
+ }
+
+ skb->dev = client_info->slave->dev;
+
+ if (client_info->vlan_id) {
+ __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
+ client_info->vlan_id);
+ }
+
+ arp_xmit(skb);
+ }
+}
+
+/* sends ARP REPLIES that update the clients that need updating */
+static void rlb_update_rx_clients(struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct rlb_client_info *client_info;
+ u32 hash_index;
+
+ spin_lock_bh(&bond->mode_lock);
+
+ hash_index = bond_info->rx_hashtbl_used_head;
+ for (; hash_index != RLB_NULL_INDEX;
+ hash_index = client_info->used_next) {
+ client_info = &(bond_info->rx_hashtbl[hash_index]);
+ if (client_info->ntt) {
+ rlb_update_client(client_info);
+ if (bond_info->rlb_update_retry_counter == 0)
+ client_info->ntt = 0;
+ }
+ }
+
+ /* do not update the entries again until this counter is zero so that
+ * not to confuse the clients.
+ */
+ bond_info->rlb_update_delay_counter = RLB_UPDATE_DELAY;
+
+ spin_unlock_bh(&bond->mode_lock);
+}
+
+/* The slave was assigned a new mac address - update the clients */
+static void rlb_req_update_slave_clients(struct bonding *bond, struct slave *slave)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct rlb_client_info *client_info;
+ int ntt = 0;
+ u32 hash_index;
+
+ spin_lock_bh(&bond->mode_lock);
+
+ hash_index = bond_info->rx_hashtbl_used_head;
+ for (; hash_index != RLB_NULL_INDEX;
+ hash_index = client_info->used_next) {
+ client_info = &(bond_info->rx_hashtbl[hash_index]);
+
+ if ((client_info->slave == slave) &&
+ is_valid_ether_addr(client_info->mac_dst)) {
+ client_info->ntt = 1;
+ ntt = 1;
+ }
+ }
+
+ /* update the team's flag only after the whole iteration */
+ if (ntt) {
+ bond_info->rx_ntt = 1;
+ /* fasten the change */
+ bond_info->rlb_update_retry_counter = RLB_UPDATE_RETRY;
+ }
+
+ spin_unlock_bh(&bond->mode_lock);
+}
+
+/* mark all clients using src_ip to be updated */
+static void rlb_req_update_subnet_clients(struct bonding *bond, __be32 src_ip)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct rlb_client_info *client_info;
+ u32 hash_index;
+
+ spin_lock(&bond->mode_lock);
+
+ hash_index = bond_info->rx_hashtbl_used_head;
+ for (; hash_index != RLB_NULL_INDEX;
+ hash_index = client_info->used_next) {
+ client_info = &(bond_info->rx_hashtbl[hash_index]);
+
+ if (!client_info->slave) {
+ netdev_err(bond->dev, "found a client with no channel in the client's hash table\n");
+ continue;
+ }
+ /* update all clients using this src_ip, that are not assigned
+ * to the team's address (curr_active_slave) and have a known
+ * unicast mac address.
+ */
+ if ((client_info->ip_src == src_ip) &&
+ !ether_addr_equal_64bits(client_info->slave->dev->dev_addr,
+ bond->dev->dev_addr) &&
+ is_valid_ether_addr(client_info->mac_dst)) {
+ client_info->ntt = 1;
+ bond_info->rx_ntt = 1;
+ }
+ }
+
+ spin_unlock(&bond->mode_lock);
+}
+
+static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct arp_pkt *arp = arp_pkt(skb);
+ struct slave *assigned_slave, *curr_active_slave;
+ struct rlb_client_info *client_info;
+ u32 hash_index = 0;
+
+ spin_lock(&bond->mode_lock);
+
+ curr_active_slave = rcu_dereference(bond->curr_active_slave);
+
+ hash_index = _simple_hash((u8 *)&arp->ip_dst, sizeof(arp->ip_dst));
+ client_info = &(bond_info->rx_hashtbl[hash_index]);
+
+ if (client_info->assigned) {
+ if ((client_info->ip_src == arp->ip_src) &&
+ (client_info->ip_dst == arp->ip_dst)) {
+ /* the entry is already assigned to this client */
+ if (!is_broadcast_ether_addr(arp->mac_dst)) {
+ /* update mac address from arp */
+ ether_addr_copy(client_info->mac_dst, arp->mac_dst);
+ }
+ ether_addr_copy(client_info->mac_src, arp->mac_src);
+
+ assigned_slave = client_info->slave;
+ if (assigned_slave) {
+ spin_unlock(&bond->mode_lock);
+ return assigned_slave;
+ }
+ } else {
+ /* the entry is already assigned to some other client,
+ * move the old client to primary (curr_active_slave) so
+ * that the new client can be assigned to this entry.
+ */
+ if (curr_active_slave &&
+ client_info->slave != curr_active_slave) {
+ client_info->slave = curr_active_slave;
+ rlb_update_client(client_info);
+ }
+ }
+ }
+ /* assign a new slave */
+ assigned_slave = __rlb_next_rx_slave(bond);
+
+ if (assigned_slave) {
+ if (!(client_info->assigned &&
+ client_info->ip_src == arp->ip_src)) {
+ /* ip_src is going to be updated,
+ * fix the src hash list
+ */
+ u32 hash_src = _simple_hash((u8 *)&arp->ip_src,
+ sizeof(arp->ip_src));
+ rlb_src_unlink(bond, hash_index);
+ rlb_src_link(bond, hash_src, hash_index);
+ }
+
+ client_info->ip_src = arp->ip_src;
+ client_info->ip_dst = arp->ip_dst;
+ /* arp->mac_dst is broadcast for arp reqeusts.
+ * will be updated with clients actual unicast mac address
+ * upon receiving an arp reply.
+ */
+ ether_addr_copy(client_info->mac_dst, arp->mac_dst);
+ ether_addr_copy(client_info->mac_src, arp->mac_src);
+ client_info->slave = assigned_slave;
+
+ if (is_valid_ether_addr(client_info->mac_dst)) {
+ client_info->ntt = 1;
+ bond->alb_info.rx_ntt = 1;
+ } else {
+ client_info->ntt = 0;
+ }
+
+ if (vlan_get_tag(skb, &client_info->vlan_id))
+ client_info->vlan_id = 0;
+
+ if (!client_info->assigned) {
+ u32 prev_tbl_head = bond_info->rx_hashtbl_used_head;
+ bond_info->rx_hashtbl_used_head = hash_index;
+ client_info->used_next = prev_tbl_head;
+ if (prev_tbl_head != RLB_NULL_INDEX) {
+ bond_info->rx_hashtbl[prev_tbl_head].used_prev =
+ hash_index;
+ }
+ client_info->assigned = 1;
+ }
+ }
+
+ spin_unlock(&bond->mode_lock);
+
+ return assigned_slave;
+}
+
+/* chooses (and returns) transmit channel for arp reply
+ * does not choose channel for other arp types since they are
+ * sent on the curr_active_slave
+ */
+static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond)
+{
+ struct arp_pkt *arp = arp_pkt(skb);
+ struct slave *tx_slave = NULL;
+
+ /* Don't modify or load balance ARPs that do not originate locally
+ * (e.g.,arrive via a bridge).
+ */
+ if (!bond_slave_has_mac_rx(bond, arp->mac_src))
+ return NULL;
+
+ if (arp->op_code == htons(ARPOP_REPLY)) {
+ /* the arp must be sent on the selected rx channel */
+ tx_slave = rlb_choose_channel(skb, bond);
+ if (tx_slave)
+ bond_hw_addr_copy(arp->mac_src, tx_slave->dev->dev_addr,
+ tx_slave->dev->addr_len);
+ netdev_dbg(bond->dev, "Server sent ARP Reply packet\n");
+ } else if (arp->op_code == htons(ARPOP_REQUEST)) {
+ /* Create an entry in the rx_hashtbl for this client as a
+ * place holder.
+ * When the arp reply is received the entry will be updated
+ * with the correct unicast address of the client.
+ */
+ rlb_choose_channel(skb, bond);
+
+ /* The ARP reply packets must be delayed so that
+ * they can cancel out the influence of the ARP request.
+ */
+ bond->alb_info.rlb_update_delay_counter = RLB_UPDATE_DELAY;
+
+ /* arp requests are broadcast and are sent on the primary
+ * the arp request will collapse all clients on the subnet to
+ * the primary slave. We must register these clients to be
+ * updated with their assigned mac.
+ */
+ rlb_req_update_subnet_clients(bond, arp->ip_src);
+ netdev_dbg(bond->dev, "Server sent ARP Request packet\n");
+ }
+
+ return tx_slave;
+}
+
+static void rlb_rebalance(struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct slave *assigned_slave;
+ struct rlb_client_info *client_info;
+ int ntt;
+ u32 hash_index;
+
+ spin_lock_bh(&bond->mode_lock);
+
+ ntt = 0;
+ hash_index = bond_info->rx_hashtbl_used_head;
+ for (; hash_index != RLB_NULL_INDEX;
+ hash_index = client_info->used_next) {
+ client_info = &(bond_info->rx_hashtbl[hash_index]);
+ assigned_slave = __rlb_next_rx_slave(bond);
+ if (assigned_slave && (client_info->slave != assigned_slave)) {
+ client_info->slave = assigned_slave;
+ if (!is_zero_ether_addr(client_info->mac_dst)) {
+ client_info->ntt = 1;
+ ntt = 1;
+ }
+ }
+ }
+
+ /* update the team's flag only after the whole iteration */
+ if (ntt)
+ bond_info->rx_ntt = 1;
+ spin_unlock_bh(&bond->mode_lock);
+}
+
+/* Caller must hold mode_lock */
+static void rlb_init_table_entry_dst(struct rlb_client_info *entry)
+{
+ entry->used_next = RLB_NULL_INDEX;
+ entry->used_prev = RLB_NULL_INDEX;
+ entry->assigned = 0;
+ entry->slave = NULL;
+ entry->vlan_id = 0;
+}
+static void rlb_init_table_entry_src(struct rlb_client_info *entry)
+{
+ entry->src_first = RLB_NULL_INDEX;
+ entry->src_prev = RLB_NULL_INDEX;
+ entry->src_next = RLB_NULL_INDEX;
+}
+
+static void rlb_init_table_entry(struct rlb_client_info *entry)
+{
+ memset(entry, 0, sizeof(struct rlb_client_info));
+ rlb_init_table_entry_dst(entry);
+ rlb_init_table_entry_src(entry);
+}
+
+static void rlb_delete_table_entry_dst(struct bonding *bond, u32 index)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ u32 next_index = bond_info->rx_hashtbl[index].used_next;
+ u32 prev_index = bond_info->rx_hashtbl[index].used_prev;
+
+ if (index == bond_info->rx_hashtbl_used_head)
+ bond_info->rx_hashtbl_used_head = next_index;
+ if (prev_index != RLB_NULL_INDEX)
+ bond_info->rx_hashtbl[prev_index].used_next = next_index;
+ if (next_index != RLB_NULL_INDEX)
+ bond_info->rx_hashtbl[next_index].used_prev = prev_index;
+}
+
+/* unlink a rlb hash table entry from the src list */
+static void rlb_src_unlink(struct bonding *bond, u32 index)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ u32 next_index = bond_info->rx_hashtbl[index].src_next;
+ u32 prev_index = bond_info->rx_hashtbl[index].src_prev;
+
+ bond_info->rx_hashtbl[index].src_next = RLB_NULL_INDEX;
+ bond_info->rx_hashtbl[index].src_prev = RLB_NULL_INDEX;
+
+ if (next_index != RLB_NULL_INDEX)
+ bond_info->rx_hashtbl[next_index].src_prev = prev_index;
+
+ if (prev_index == RLB_NULL_INDEX)
+ return;
+
+ /* is prev_index pointing to the head of this list? */
+ if (bond_info->rx_hashtbl[prev_index].src_first == index)
+ bond_info->rx_hashtbl[prev_index].src_first = next_index;
+ else
+ bond_info->rx_hashtbl[prev_index].src_next = next_index;
+
+}
+
+static void rlb_delete_table_entry(struct bonding *bond, u32 index)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct rlb_client_info *entry = &(bond_info->rx_hashtbl[index]);
+
+ rlb_delete_table_entry_dst(bond, index);
+ rlb_init_table_entry_dst(entry);
+
+ rlb_src_unlink(bond, index);
+}
+
+/* add the rx_hashtbl[ip_dst_hash] entry to the list
+ * of entries with identical ip_src_hash
+ */
+static void rlb_src_link(struct bonding *bond, u32 ip_src_hash, u32 ip_dst_hash)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ u32 next;
+
+ bond_info->rx_hashtbl[ip_dst_hash].src_prev = ip_src_hash;
+ next = bond_info->rx_hashtbl[ip_src_hash].src_first;
+ bond_info->rx_hashtbl[ip_dst_hash].src_next = next;
+ if (next != RLB_NULL_INDEX)
+ bond_info->rx_hashtbl[next].src_prev = ip_dst_hash;
+ bond_info->rx_hashtbl[ip_src_hash].src_first = ip_dst_hash;
+}
+
+/* deletes all rx_hashtbl entries with arp->ip_src if their mac_src does
+ * not match arp->mac_src
+ */
+static void rlb_purge_src_ip(struct bonding *bond, struct arp_pkt *arp)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ u32 ip_src_hash = _simple_hash((u8 *)&(arp->ip_src), sizeof(arp->ip_src));
+ u32 index;
+
+ spin_lock_bh(&bond->mode_lock);
+
+ index = bond_info->rx_hashtbl[ip_src_hash].src_first;
+ while (index != RLB_NULL_INDEX) {
+ struct rlb_client_info *entry = &(bond_info->rx_hashtbl[index]);
+ u32 next_index = entry->src_next;
+ if (entry->ip_src == arp->ip_src &&
+ !ether_addr_equal_64bits(arp->mac_src, entry->mac_src))
+ rlb_delete_table_entry(bond, index);
+ index = next_index;
+ }
+ spin_unlock_bh(&bond->mode_lock);
+}
+
+static int rlb_initialize(struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct rlb_client_info *new_hashtbl;
+ int size = RLB_HASH_TABLE_SIZE * sizeof(struct rlb_client_info);
+ int i;
+
+ new_hashtbl = kmalloc(size, GFP_KERNEL);
+ if (!new_hashtbl)
+ return -1;
+
+ spin_lock_bh(&bond->mode_lock);
+
+ bond_info->rx_hashtbl = new_hashtbl;
+
+ bond_info->rx_hashtbl_used_head = RLB_NULL_INDEX;
+
+ for (i = 0; i < RLB_HASH_TABLE_SIZE; i++)
+ rlb_init_table_entry(bond_info->rx_hashtbl + i);
+
+ spin_unlock_bh(&bond->mode_lock);
+
+ /* register to receive ARPs */
+ bond->recv_probe = rlb_arp_recv;
+
+ return 0;
+}
+
+static void rlb_deinitialize(struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+
+ spin_lock_bh(&bond->mode_lock);
+
+ kfree(bond_info->rx_hashtbl);
+ bond_info->rx_hashtbl = NULL;
+ bond_info->rx_hashtbl_used_head = RLB_NULL_INDEX;
+
+ spin_unlock_bh(&bond->mode_lock);
+}
+
+static void rlb_clear_vlan(struct bonding *bond, unsigned short vlan_id)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ u32 curr_index;
+
+ spin_lock_bh(&bond->mode_lock);
+
+ curr_index = bond_info->rx_hashtbl_used_head;
+ while (curr_index != RLB_NULL_INDEX) {
+ struct rlb_client_info *curr = &(bond_info->rx_hashtbl[curr_index]);
+ u32 next_index = bond_info->rx_hashtbl[curr_index].used_next;
+
+ if (curr->vlan_id == vlan_id)
+ rlb_delete_table_entry(bond, curr_index);
+
+ curr_index = next_index;
+ }
+
+ spin_unlock_bh(&bond->mode_lock);
+}
+
+/*********************** tlb/rlb shared functions *********************/
+
+static void alb_send_lp_vid(struct slave *slave, u8 mac_addr[],
+ __be16 vlan_proto, u16 vid)
+{
+ struct learning_pkt pkt;
+ struct sk_buff *skb;
+ int size = sizeof(struct learning_pkt);
+
+ memset(&pkt, 0, size);
+ ether_addr_copy(pkt.mac_dst, mac_addr);
+ ether_addr_copy(pkt.mac_src, mac_addr);
+ pkt.type = cpu_to_be16(ETH_P_LOOPBACK);
+
+ skb = dev_alloc_skb(size);
+ if (!skb)
+ return;
+
+ skb_put_data(skb, &pkt, size);
+
+ skb_reset_mac_header(skb);
+ skb->network_header = skb->mac_header + ETH_HLEN;
+ skb->protocol = pkt.type;
+ skb->priority = TC_PRIO_CONTROL;
+ skb->dev = slave->dev;
+
+ netdev_dbg(slave->bond->dev,
+ "Send learning packet: dev %s mac %pM vlan %d\n",
+ slave->dev->name, mac_addr, vid);
+
+ if (vid)
+ __vlan_hwaccel_put_tag(skb, vlan_proto, vid);
+
+ dev_queue_xmit(skb);
+}
+
+struct alb_walk_data {
+ struct bonding *bond;
+ struct slave *slave;
+ u8 *mac_addr;
+ bool strict_match;
+};
+
+static int alb_upper_dev_walk(struct net_device *upper, void *_data)
+{
+ struct alb_walk_data *data = _data;
+ bool strict_match = data->strict_match;
+ struct bonding *bond = data->bond;
+ struct slave *slave = data->slave;
+ u8 *mac_addr = data->mac_addr;
+ struct bond_vlan_tag *tags;
+
+ if (is_vlan_dev(upper) &&
+ bond->nest_level == vlan_get_encap_level(upper) - 1) {
+ if (upper->addr_assign_type == NET_ADDR_STOLEN) {
+ alb_send_lp_vid(slave, mac_addr,
+ vlan_dev_vlan_proto(upper),
+ vlan_dev_vlan_id(upper));
+ } else {
+ alb_send_lp_vid(slave, upper->dev_addr,
+ vlan_dev_vlan_proto(upper),
+ vlan_dev_vlan_id(upper));
+ }
+ }
+
+ /* If this is a macvlan device, then only send updates
+ * when strict_match is turned off.
+ */
+ if (netif_is_macvlan(upper) && !strict_match) {
+ tags = bond_verify_device_path(bond->dev, upper, 0);
+ if (IS_ERR_OR_NULL(tags))
+ BUG();
+ alb_send_lp_vid(slave, upper->dev_addr,
+ tags[0].vlan_proto, tags[0].vlan_id);
+ kfree(tags);
+ }
+
+ return 0;
+}
+
+static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[],
+ bool strict_match)
+{
+ struct bonding *bond = bond_get_bond_by_slave(slave);
+ struct alb_walk_data data = {
+ .strict_match = strict_match,
+ .mac_addr = mac_addr,
+ .slave = slave,
+ .bond = bond,
+ };
+
+ /* send untagged */
+ alb_send_lp_vid(slave, mac_addr, 0, 0);
+
+ /* loop through all devices and see if we need to send a packet
+ * for that device.
+ */
+ rcu_read_lock();
+ netdev_walk_all_upper_dev_rcu(bond->dev, alb_upper_dev_walk, &data);
+ rcu_read_unlock();
+}
+
+static int alb_set_slave_mac_addr(struct slave *slave, u8 addr[],
+ unsigned int len)
+{
+ struct net_device *dev = slave->dev;
+ struct sockaddr_storage ss;
+
+ if (BOND_MODE(slave->bond) == BOND_MODE_TLB) {
+ memcpy(dev->dev_addr, addr, len);
+ return 0;
+ }
+
+ /* for rlb each slave must have a unique hw mac addresses so that
+ * each slave will receive packets destined to a different mac
+ */
+ memcpy(ss.__data, addr, len);
+ ss.ss_family = dev->type;
+ if (dev_set_mac_address(dev, (struct sockaddr *)&ss)) {
+ netdev_err(slave->bond->dev, "dev_set_mac_address of dev %s failed! ALB mode requires that the base driver support setting the hw address also when the network device's interface is open\n",
+ dev->name);
+ return -EOPNOTSUPP;
+ }
+ return 0;
+}
+
+/* Swap MAC addresses between two slaves.
+ *
+ * Called with RTNL held, and no other locks.
+ */
+static void alb_swap_mac_addr(struct slave *slave1, struct slave *slave2)
+{
+ u8 tmp_mac_addr[MAX_ADDR_LEN];
+
+ bond_hw_addr_copy(tmp_mac_addr, slave1->dev->dev_addr,
+ slave1->dev->addr_len);
+ alb_set_slave_mac_addr(slave1, slave2->dev->dev_addr,
+ slave2->dev->addr_len);
+ alb_set_slave_mac_addr(slave2, tmp_mac_addr,
+ slave1->dev->addr_len);
+
+}
+
+/* Send learning packets after MAC address swap.
+ *
+ * Called with RTNL and no other locks
+ */
+static void alb_fasten_mac_swap(struct bonding *bond, struct slave *slave1,
+ struct slave *slave2)
+{
+ int slaves_state_differ = (bond_slave_can_tx(slave1) != bond_slave_can_tx(slave2));
+ struct slave *disabled_slave = NULL;
+
+ ASSERT_RTNL();
+
+ /* fasten the change in the switch */
+ if (bond_slave_can_tx(slave1)) {
+ alb_send_learning_packets(slave1, slave1->dev->dev_addr, false);
+ if (bond->alb_info.rlb_enabled) {
+ /* inform the clients that the mac address
+ * has changed
+ */
+ rlb_req_update_slave_clients(bond, slave1);
+ }
+ } else {
+ disabled_slave = slave1;
+ }
+
+ if (bond_slave_can_tx(slave2)) {
+ alb_send_learning_packets(slave2, slave2->dev->dev_addr, false);
+ if (bond->alb_info.rlb_enabled) {
+ /* inform the clients that the mac address
+ * has changed
+ */
+ rlb_req_update_slave_clients(bond, slave2);
+ }
+ } else {
+ disabled_slave = slave2;
+ }
+
+ if (bond->alb_info.rlb_enabled && slaves_state_differ) {
+ /* A disabled slave was assigned an active mac addr */
+ rlb_teach_disabled_mac_on_primary(bond,
+ disabled_slave->dev->dev_addr);
+ }
+}
+
+/**
+ * alb_change_hw_addr_on_detach
+ * @bond: bonding we're working on
+ * @slave: the slave that was just detached
+ *
+ * We assume that @slave was already detached from the slave list.
+ *
+ * If @slave's permanent hw address is different both from its current
+ * address and from @bond's address, then somewhere in the bond there's
+ * a slave that has @slave's permanet address as its current address.
+ * We'll make sure that that slave no longer uses @slave's permanent address.
+ *
+ * Caller must hold RTNL and no other locks
+ */
+static void alb_change_hw_addr_on_detach(struct bonding *bond, struct slave *slave)
+{
+ int perm_curr_diff;
+ int perm_bond_diff;
+ struct slave *found_slave;
+
+ perm_curr_diff = !ether_addr_equal_64bits(slave->perm_hwaddr,
+ slave->dev->dev_addr);
+ perm_bond_diff = !ether_addr_equal_64bits(slave->perm_hwaddr,
+ bond->dev->dev_addr);
+
+ if (perm_curr_diff && perm_bond_diff) {
+ found_slave = bond_slave_has_mac(bond, slave->perm_hwaddr);
+
+ if (found_slave) {
+ alb_swap_mac_addr(slave, found_slave);
+ alb_fasten_mac_swap(bond, slave, found_slave);
+ }
+ }
+}
+
+/**
+ * alb_handle_addr_collision_on_attach
+ * @bond: bonding we're working on
+ * @slave: the slave that was just attached
+ *
+ * checks uniqueness of slave's mac address and handles the case the
+ * new slave uses the bonds mac address.
+ *
+ * If the permanent hw address of @slave is @bond's hw address, we need to
+ * find a different hw address to give @slave, that isn't in use by any other
+ * slave in the bond. This address must be, of course, one of the permanent
+ * addresses of the other slaves.
+ *
+ * We go over the slave list, and for each slave there we compare its
+ * permanent hw address with the current address of all the other slaves.
+ * If no match was found, then we've found a slave with a permanent address
+ * that isn't used by any other slave in the bond, so we can assign it to
+ * @slave.
+ *
+ * assumption: this function is called before @slave is attached to the
+ * bond slave list.
+ */
+static int alb_handle_addr_collision_on_attach(struct bonding *bond, struct slave *slave)
+{
+ struct slave *has_bond_addr = rcu_access_pointer(bond->curr_active_slave);
+ struct slave *tmp_slave1, *free_mac_slave = NULL;
+ struct list_head *iter;
+
+ if (!bond_has_slaves(bond)) {
+ /* this is the first slave */
+ return 0;
+ }
+
+ /* if slave's mac address differs from bond's mac address
+ * check uniqueness of slave's mac address against the other
+ * slaves in the bond.
+ */
+ if (!ether_addr_equal_64bits(slave->perm_hwaddr, bond->dev->dev_addr)) {
+ if (!bond_slave_has_mac(bond, slave->dev->dev_addr))
+ return 0;
+
+ /* Try setting slave mac to bond address and fall-through
+ * to code handling that situation below...
+ */
+ alb_set_slave_mac_addr(slave, bond->dev->dev_addr,
+ bond->dev->addr_len);
+ }
+
+ /* The slave's address is equal to the address of the bond.
+ * Search for a spare address in the bond for this slave.
+ */
+ bond_for_each_slave(bond, tmp_slave1, iter) {
+ if (!bond_slave_has_mac(bond, tmp_slave1->perm_hwaddr)) {
+ /* no slave has tmp_slave1's perm addr
+ * as its curr addr
+ */
+ free_mac_slave = tmp_slave1;
+ break;
+ }
+
+ if (!has_bond_addr) {
+ if (ether_addr_equal_64bits(tmp_slave1->dev->dev_addr,
+ bond->dev->dev_addr)) {
+
+ has_bond_addr = tmp_slave1;
+ }
+ }
+ }
+
+ if (free_mac_slave) {
+ alb_set_slave_mac_addr(slave, free_mac_slave->perm_hwaddr,
+ free_mac_slave->dev->addr_len);
+
+ netdev_warn(bond->dev, "the hw address of slave %s is in use by the bond; giving it the hw address of %s\n",
+ slave->dev->name, free_mac_slave->dev->name);
+
+ } else if (has_bond_addr) {
+ netdev_err(bond->dev, "the hw address of slave %s is in use by the bond; couldn't find a slave with a free hw address to give it (this should not have happened)\n",
+ slave->dev->name);
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+/**
+ * alb_set_mac_address
+ * @bond:
+ * @addr:
+ *
+ * In TLB mode all slaves are configured to the bond's hw address, but set
+ * their dev_addr field to different addresses (based on their permanent hw
+ * addresses).
+ *
+ * For each slave, this function sets the interface to the new address and then
+ * changes its dev_addr field to its previous value.
+ *
+ * Unwinding assumes bond's mac address has not yet changed.
+ */
+static int alb_set_mac_address(struct bonding *bond, void *addr)
+{
+ struct slave *slave, *rollback_slave;
+ struct list_head *iter;
+ struct sockaddr_storage ss;
+ char tmp_addr[MAX_ADDR_LEN];
+ int res;
+
+ if (bond->alb_info.rlb_enabled)
+ return 0;
+
+ bond_for_each_slave(bond, slave, iter) {
+ /* save net_device's current hw address */
+ bond_hw_addr_copy(tmp_addr, slave->dev->dev_addr,
+ slave->dev->addr_len);
+
+ res = dev_set_mac_address(slave->dev, addr);
+
+ /* restore net_device's hw address */
+ bond_hw_addr_copy(slave->dev->dev_addr, tmp_addr,
+ slave->dev->addr_len);
+
+ if (res)
+ goto unwind;
+ }
+
+ return 0;
+
+unwind:
+ memcpy(ss.__data, bond->dev->dev_addr, bond->dev->addr_len);
+ ss.ss_family = bond->dev->type;
+
+ /* unwind from head to the slave that failed */
+ bond_for_each_slave(bond, rollback_slave, iter) {
+ if (rollback_slave == slave)
+ break;
+ bond_hw_addr_copy(tmp_addr, rollback_slave->dev->dev_addr,
+ rollback_slave->dev->addr_len);
+ dev_set_mac_address(rollback_slave->dev,
+ (struct sockaddr *)&ss);
+ bond_hw_addr_copy(rollback_slave->dev->dev_addr, tmp_addr,
+ rollback_slave->dev->addr_len);
+ }
+
+ return res;
+}
+
+/************************ exported alb funcions ************************/
+
+int bond_alb_initialize(struct bonding *bond, int rlb_enabled)
+{
+ int res;
+
+ res = tlb_initialize(bond);
+ if (res)
+ return res;
+
+ if (rlb_enabled) {
+ bond->alb_info.rlb_enabled = 1;
+ res = rlb_initialize(bond);
+ if (res) {
+ tlb_deinitialize(bond);
+ return res;
+ }
+ } else {
+ bond->alb_info.rlb_enabled = 0;
+ }
+
+ return 0;
+}
+
+void bond_alb_deinitialize(struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+
+ tlb_deinitialize(bond);
+
+ if (bond_info->rlb_enabled)
+ rlb_deinitialize(bond);
+}
+
+static netdev_tx_t bond_do_alb_xmit(struct sk_buff *skb, struct bonding *bond,
+ struct slave *tx_slave)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct ethhdr *eth_data = eth_hdr(skb);
+
+ if (!tx_slave) {
+ /* unbalanced or unassigned, send through primary */
+ tx_slave = rcu_dereference(bond->curr_active_slave);
+ if (bond->params.tlb_dynamic_lb)
+ bond_info->unbalanced_load += skb->len;
+ }
+
+ if (tx_slave && bond_slave_can_tx(tx_slave)) {
+ if (tx_slave != rcu_access_pointer(bond->curr_active_slave)) {
+ ether_addr_copy(eth_data->h_source,
+ tx_slave->dev->dev_addr);
+ }
+
+ bond_dev_queue_xmit(bond, skb, tx_slave->dev);
+ goto out;
+ }
+
+ if (tx_slave && bond->params.tlb_dynamic_lb) {
+ spin_lock(&bond->mode_lock);
+ __tlb_clear_slave(bond, tx_slave, 0);
+ spin_unlock(&bond->mode_lock);
+ }
+
+ /* no suitable interface, frame not sent */
+ bond_tx_drop(bond->dev, skb);
+out:
+ return NETDEV_TX_OK;
+}
+
+netdev_tx_t bond_tlb_xmit(struct sk_buff *skb, struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct ethhdr *eth_data;
+ struct slave *tx_slave = NULL;
+ u32 hash_index;
+
+ skb_reset_mac_header(skb);
+ eth_data = eth_hdr(skb);
+
+ /* Do not TX balance any multicast or broadcast */
+ if (!is_multicast_ether_addr(eth_data->h_dest)) {
+ switch (skb->protocol) {
+ case htons(ETH_P_IP):
+ case htons(ETH_P_IPX):
+ /* In case of IPX, it will falback to L2 hash */
+ case htons(ETH_P_IPV6):
+ hash_index = bond_xmit_hash(bond, skb);
+ if (bond->params.tlb_dynamic_lb) {
+ tx_slave = tlb_choose_channel(bond,
+ hash_index & 0xFF,
+ skb->len);
+ } else {
+ struct bond_up_slave *slaves;
+ unsigned int count;
+
+ slaves = rcu_dereference(bond->slave_arr);
+ count = slaves ? READ_ONCE(slaves->count) : 0;
+ if (likely(count))
+ tx_slave = slaves->arr[hash_index %
+ count];
+ }
+ break;
+ }
+ }
+ return bond_do_alb_xmit(skb, bond, tx_slave);
+}
+
+netdev_tx_t bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct ethhdr *eth_data;
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct slave *tx_slave = NULL;
+ static const __be32 ip_bcast = htonl(0xffffffff);
+ int hash_size = 0;
+ bool do_tx_balance = true;
+ u32 hash_index = 0;
+ const u8 *hash_start = NULL;
+ struct ipv6hdr *ip6hdr;
+
+ skb_reset_mac_header(skb);
+ eth_data = eth_hdr(skb);
+
+ switch (ntohs(skb->protocol)) {
+ case ETH_P_IP: {
+ const struct iphdr *iph = ip_hdr(skb);
+
+ if (is_broadcast_ether_addr(eth_data->h_dest) ||
+ iph->daddr == ip_bcast ||
+ iph->protocol == IPPROTO_IGMP) {
+ do_tx_balance = false;
+ break;
+ }
+ hash_start = (char *)&(iph->daddr);
+ hash_size = sizeof(iph->daddr);
+ }
+ break;
+ case ETH_P_IPV6:
+ /* IPv6 doesn't really use broadcast mac address, but leave
+ * that here just in case.
+ */
+ if (is_broadcast_ether_addr(eth_data->h_dest)) {
+ do_tx_balance = false;
+ break;
+ }
+
+ /* IPv6 uses all-nodes multicast as an equivalent to
+ * broadcasts in IPv4.
+ */
+ if (ether_addr_equal_64bits(eth_data->h_dest, mac_v6_allmcast)) {
+ do_tx_balance = false;
+ break;
+ }
+
+ /* Additianally, DAD probes should not be tx-balanced as that
+ * will lead to false positives for duplicate addresses and
+ * prevent address configuration from working.
+ */
+ ip6hdr = ipv6_hdr(skb);
+ if (ipv6_addr_any(&ip6hdr->saddr)) {
+ do_tx_balance = false;
+ break;
+ }
+
+ hash_start = (char *)&(ipv6_hdr(skb)->daddr);
+ hash_size = sizeof(ipv6_hdr(skb)->daddr);
+ break;
+ case ETH_P_IPX:
+ if (ipx_hdr(skb)->ipx_checksum != IPX_NO_CHECKSUM) {
+ /* something is wrong with this packet */
+ do_tx_balance = false;
+ break;
+ }
+
+ if (ipx_hdr(skb)->ipx_type != IPX_TYPE_NCP) {
+ /* The only protocol worth balancing in
+ * this family since it has an "ARP" like
+ * mechanism
+ */
+ do_tx_balance = false;
+ break;
+ }
+
+ hash_start = (char *)eth_data->h_dest;
+ hash_size = ETH_ALEN;
+ break;
+ case ETH_P_ARP:
+ do_tx_balance = false;
+ if (bond_info->rlb_enabled)
+ tx_slave = rlb_arp_xmit(skb, bond);
+ break;
+ default:
+ do_tx_balance = false;
+ break;
+ }
+
+ if (do_tx_balance) {
+ if (bond->params.tlb_dynamic_lb) {
+ hash_index = _simple_hash(hash_start, hash_size);
+ tx_slave = tlb_choose_channel(bond, hash_index, skb->len);
+ } else {
+ /*
+ * do_tx_balance means we are free to select the tx_slave
+ * So we do exactly what tlb would do for hash selection
+ */
+
+ struct bond_up_slave *slaves;
+ unsigned int count;
+
+ slaves = rcu_dereference(bond->slave_arr);
+ count = slaves ? READ_ONCE(slaves->count) : 0;
+ if (likely(count))
+ tx_slave = slaves->arr[bond_xmit_hash(bond, skb) %
+ count];
+ }
+ }
+
+ return bond_do_alb_xmit(skb, bond, tx_slave);
+}
+
+void bond_alb_monitor(struct work_struct *work)
+{
+ struct bonding *bond = container_of(work, struct bonding,
+ alb_work.work);
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct list_head *iter;
+ struct slave *slave;
+
+ if (!bond_has_slaves(bond)) {
+ bond_info->tx_rebalance_counter = 0;
+ bond_info->lp_counter = 0;
+ goto re_arm;
+ }
+
+ rcu_read_lock();
+
+ bond_info->tx_rebalance_counter++;
+ bond_info->lp_counter++;
+
+ /* send learning packets */
+ if (bond_info->lp_counter >= BOND_ALB_LP_TICKS(bond)) {
+ bool strict_match;
+
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ /* If updating current_active, use all currently
+ * user mac addreses (!strict_match). Otherwise, only
+ * use mac of the slave device.
+ * In RLB mode, we always use strict matches.
+ */
+ strict_match = (slave != rcu_access_pointer(bond->curr_active_slave) ||
+ bond_info->rlb_enabled);
+ alb_send_learning_packets(slave, slave->dev->dev_addr,
+ strict_match);
+ }
+ bond_info->lp_counter = 0;
+ }
+
+ /* rebalance tx traffic */
+ if (bond_info->tx_rebalance_counter >= BOND_TLB_REBALANCE_TICKS) {
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ tlb_clear_slave(bond, slave, 1);
+ if (slave == rcu_access_pointer(bond->curr_active_slave)) {
+ SLAVE_TLB_INFO(slave).load =
+ bond_info->unbalanced_load /
+ BOND_TLB_REBALANCE_INTERVAL;
+ bond_info->unbalanced_load = 0;
+ }
+ }
+ bond_info->tx_rebalance_counter = 0;
+ }
+
+ if (bond_info->rlb_enabled) {
+ if (bond_info->primary_is_promisc &&
+ (++bond_info->rlb_promisc_timeout_counter >= RLB_PROMISC_TIMEOUT)) {
+
+ /* dev_set_promiscuity requires rtnl and
+ * nothing else. Avoid race with bond_close.
+ */
+ rcu_read_unlock();
+ if (!rtnl_trylock())
+ goto re_arm;
+
+ bond_info->rlb_promisc_timeout_counter = 0;
+
+ /* If the primary was set to promiscuous mode
+ * because a slave was disabled then
+ * it can now leave promiscuous mode.
+ */
+ dev_set_promiscuity(rtnl_dereference(bond->curr_active_slave)->dev,
+ -1);
+ bond_info->primary_is_promisc = 0;
+
+ rtnl_unlock();
+ rcu_read_lock();
+ }
+
+ if (bond_info->rlb_rebalance) {
+ bond_info->rlb_rebalance = 0;
+ rlb_rebalance(bond);
+ }
+
+ /* check if clients need updating */
+ if (bond_info->rx_ntt) {
+ if (bond_info->rlb_update_delay_counter) {
+ --bond_info->rlb_update_delay_counter;
+ } else {
+ rlb_update_rx_clients(bond);
+ if (bond_info->rlb_update_retry_counter)
+ --bond_info->rlb_update_retry_counter;
+ else
+ bond_info->rx_ntt = 0;
+ }
+ }
+ }
+ rcu_read_unlock();
+re_arm:
+ queue_delayed_work(bond->wq, &bond->alb_work, alb_delta_in_ticks);
+}
+
+/* assumption: called before the slave is attached to the bond
+ * and not locked by the bond lock
+ */
+int bond_alb_init_slave(struct bonding *bond, struct slave *slave)
+{
+ int res;
+
+ res = alb_set_slave_mac_addr(slave, slave->perm_hwaddr,
+ slave->dev->addr_len);
+ if (res)
+ return res;
+
+ res = alb_handle_addr_collision_on_attach(bond, slave);
+ if (res)
+ return res;
+
+ tlb_init_slave(slave);
+
+ /* order a rebalance ASAP */
+ bond->alb_info.tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS;
+
+ if (bond->alb_info.rlb_enabled)
+ bond->alb_info.rlb_rebalance = 1;
+
+ return 0;
+}
+
+/* Remove slave from tlb and rlb hash tables, and fix up MAC addresses
+ * if necessary.
+ *
+ * Caller must hold RTNL and no other locks
+ */
+void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave)
+{
+ if (bond_has_slaves(bond))
+ alb_change_hw_addr_on_detach(bond, slave);
+
+ tlb_clear_slave(bond, slave, 0);
+
+ if (bond->alb_info.rlb_enabled) {
+ bond->alb_info.rx_slave = NULL;
+ rlb_clear_slave(bond, slave);
+ }
+
+}
+
+void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+
+ if (link == BOND_LINK_DOWN) {
+ tlb_clear_slave(bond, slave, 0);
+ if (bond->alb_info.rlb_enabled)
+ rlb_clear_slave(bond, slave);
+ } else if (link == BOND_LINK_UP) {
+ /* order a rebalance ASAP */
+ bond_info->tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS;
+ if (bond->alb_info.rlb_enabled) {
+ bond->alb_info.rlb_rebalance = 1;
+ /* If the updelay module parameter is smaller than the
+ * forwarding delay of the switch the rebalance will
+ * not work because the rebalance arp replies will
+ * not be forwarded to the clients..
+ */
+ }
+ }
+
+ if (bond_is_nondyn_tlb(bond)) {
+ if (bond_update_slave_arr(bond, NULL))
+ pr_err("Failed to build slave-array for TLB mode.\n");
+ }
+}
+
+/**
+ * bond_alb_handle_active_change - assign new curr_active_slave
+ * @bond: our bonding struct
+ * @new_slave: new slave to assign
+ *
+ * Set the bond->curr_active_slave to @new_slave and handle
+ * mac address swapping and promiscuity changes as needed.
+ *
+ * Caller must hold RTNL
+ */
+void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave)
+{
+ struct slave *swap_slave;
+ struct slave *curr_active;
+
+ curr_active = rtnl_dereference(bond->curr_active_slave);
+ if (curr_active == new_slave)
+ return;
+
+ if (curr_active && bond->alb_info.primary_is_promisc) {
+ dev_set_promiscuity(curr_active->dev, -1);
+ bond->alb_info.primary_is_promisc = 0;
+ bond->alb_info.rlb_promisc_timeout_counter = 0;
+ }
+
+ swap_slave = curr_active;
+ rcu_assign_pointer(bond->curr_active_slave, new_slave);
+
+ if (!new_slave || !bond_has_slaves(bond))
+ return;
+
+ /* set the new curr_active_slave to the bonds mac address
+ * i.e. swap mac addresses of old curr_active_slave and new curr_active_slave
+ */
+ if (!swap_slave)
+ swap_slave = bond_slave_has_mac(bond, bond->dev->dev_addr);
+
+ /* Arrange for swap_slave and new_slave to temporarily be
+ * ignored so we can mess with their MAC addresses without
+ * fear of interference from transmit activity.
+ */
+ if (swap_slave)
+ tlb_clear_slave(bond, swap_slave, 1);
+ tlb_clear_slave(bond, new_slave, 1);
+
+ /* in TLB mode, the slave might flip down/up with the old dev_addr,
+ * and thus filter bond->dev_addr's packets, so force bond's mac
+ */
+ if (BOND_MODE(bond) == BOND_MODE_TLB) {
+ struct sockaddr_storage ss;
+ u8 tmp_addr[MAX_ADDR_LEN];
+
+ bond_hw_addr_copy(tmp_addr, new_slave->dev->dev_addr,
+ new_slave->dev->addr_len);
+
+ bond_hw_addr_copy(ss.__data, bond->dev->dev_addr,
+ bond->dev->addr_len);
+ ss.ss_family = bond->dev->type;
+ /* we don't care if it can't change its mac, best effort */
+ dev_set_mac_address(new_slave->dev, (struct sockaddr *)&ss);
+
+ bond_hw_addr_copy(new_slave->dev->dev_addr, tmp_addr,
+ new_slave->dev->addr_len);
+ }
+
+ /* curr_active_slave must be set before calling alb_swap_mac_addr */
+ if (swap_slave) {
+ /* swap mac address */
+ alb_swap_mac_addr(swap_slave, new_slave);
+ alb_fasten_mac_swap(bond, swap_slave, new_slave);
+ } else {
+ /* set the new_slave to the bond mac address */
+ alb_set_slave_mac_addr(new_slave, bond->dev->dev_addr,
+ bond->dev->addr_len);
+ alb_send_learning_packets(new_slave, bond->dev->dev_addr,
+ false);
+ }
+}
+
+/* Called with RTNL */
+int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct sockaddr_storage *ss = addr;
+ struct slave *curr_active;
+ struct slave *swap_slave;
+ int res;
+
+ if (!is_valid_ether_addr(ss->__data))
+ return -EADDRNOTAVAIL;
+
+ res = alb_set_mac_address(bond, addr);
+ if (res)
+ return res;
+
+ bond_hw_addr_copy(bond_dev->dev_addr, ss->__data, bond_dev->addr_len);
+
+ /* If there is no curr_active_slave there is nothing else to do.
+ * Otherwise we'll need to pass the new address to it and handle
+ * duplications.
+ */
+ curr_active = rtnl_dereference(bond->curr_active_slave);
+ if (!curr_active)
+ return 0;
+
+ swap_slave = bond_slave_has_mac(bond, bond_dev->dev_addr);
+
+ if (swap_slave) {
+ alb_swap_mac_addr(swap_slave, curr_active);
+ alb_fasten_mac_swap(bond, swap_slave, curr_active);
+ } else {
+ alb_set_slave_mac_addr(curr_active, bond_dev->dev_addr,
+ bond_dev->addr_len);
+
+ alb_send_learning_packets(curr_active,
+ bond_dev->dev_addr, false);
+ if (bond->alb_info.rlb_enabled) {
+ /* inform clients mac address has changed */
+ rlb_req_update_slave_clients(bond, curr_active);
+ }
+ }
+
+ return 0;
+}
+
+void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id)
+{
+ if (bond->alb_info.rlb_enabled)
+ rlb_clear_vlan(bond, vlan_id);
+}
+
diff --git a/drivers/net/bonding/bond_debugfs.c b/drivers/net/bonding/bond_debugfs.c
new file mode 100644
index 0000000..3868e1a
--- /dev/null
+++ b/drivers/net/bonding/bond_debugfs.c
@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+
+#include <net/bonding.h>
+#include <net/bond_alb.h>
+
+#if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_NET_NS)
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+static struct dentry *bonding_debug_root;
+
+/* Show RLB hash table */
+static int bond_debug_rlb_hash_show(struct seq_file *m, void *v)
+{
+ struct bonding *bond = m->private;
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct rlb_client_info *client_info;
+ u32 hash_index;
+
+ if (BOND_MODE(bond) != BOND_MODE_ALB)
+ return 0;
+
+ seq_printf(m, "SourceIP DestinationIP "
+ "Destination MAC DEV\n");
+
+ spin_lock_bh(&bond->mode_lock);
+
+ hash_index = bond_info->rx_hashtbl_used_head;
+ for (; hash_index != RLB_NULL_INDEX;
+ hash_index = client_info->used_next) {
+ client_info = &(bond_info->rx_hashtbl[hash_index]);
+ seq_printf(m, "%-15pI4 %-15pI4 %-17pM %s\n",
+ &client_info->ip_src,
+ &client_info->ip_dst,
+ &client_info->mac_dst,
+ client_info->slave->dev->name);
+ }
+
+ spin_unlock_bh(&bond->mode_lock);
+
+ return 0;
+}
+
+static int bond_debug_rlb_hash_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, bond_debug_rlb_hash_show, inode->i_private);
+}
+
+static const struct file_operations bond_debug_rlb_hash_fops = {
+ .owner = THIS_MODULE,
+ .open = bond_debug_rlb_hash_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+void bond_debug_register(struct bonding *bond)
+{
+ if (!bonding_debug_root)
+ return;
+
+ bond->debug_dir =
+ debugfs_create_dir(bond->dev->name, bonding_debug_root);
+
+ if (!bond->debug_dir) {
+ netdev_warn(bond->dev, "failed to register to debugfs\n");
+ return;
+ }
+
+ debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
+ bond, &bond_debug_rlb_hash_fops);
+}
+
+void bond_debug_unregister(struct bonding *bond)
+{
+ if (!bonding_debug_root)
+ return;
+
+ debugfs_remove_recursive(bond->debug_dir);
+}
+
+void bond_debug_reregister(struct bonding *bond)
+{
+ struct dentry *d;
+
+ if (!bonding_debug_root)
+ return;
+
+ d = debugfs_rename(bonding_debug_root, bond->debug_dir,
+ bonding_debug_root, bond->dev->name);
+ if (d) {
+ bond->debug_dir = d;
+ } else {
+ netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n");
+ bond_debug_unregister(bond);
+ }
+}
+
+void bond_create_debugfs(void)
+{
+ bonding_debug_root = debugfs_create_dir("bonding", NULL);
+
+ if (!bonding_debug_root) {
+ pr_warn("Warning: Cannot create bonding directory in debugfs\n");
+ }
+}
+
+void bond_destroy_debugfs(void)
+{
+ debugfs_remove_recursive(bonding_debug_root);
+ bonding_debug_root = NULL;
+}
+
+
+#else /* !CONFIG_DEBUG_FS */
+
+void bond_debug_register(struct bonding *bond)
+{
+}
+
+void bond_debug_unregister(struct bonding *bond)
+{
+}
+
+void bond_debug_reregister(struct bonding *bond)
+{
+}
+
+void bond_create_debugfs(void)
+{
+}
+
+void bond_destroy_debugfs(void)
+{
+}
+
+#endif /* CONFIG_DEBUG_FS */
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
new file mode 100644
index 0000000..3c59756
--- /dev/null
+++ b/drivers/net/bonding/bond_main.c
@@ -0,0 +1,4905 @@
+/*
+ * originally based on the dummy device.
+ *
+ * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
+ * Licensed under the GPL. Based on dummy.c, and eql.c devices.
+ *
+ * bonding.c: an Ethernet Bonding driver
+ *
+ * This is useful to talk to a Cisco EtherChannel compatible equipment:
+ * Cisco 5500
+ * Sun Trunking (Solaris)
+ * Alteon AceDirector Trunks
+ * Linux Bonding
+ * and probably many L2 switches ...
+ *
+ * How it works:
+ * ifconfig bond0 ipaddress netmask up
+ * will setup a network device, with an ip address. No mac address
+ * will be assigned at this time. The hw mac address will come from
+ * the first slave bonded to the channel. All slaves will then use
+ * this hw mac address.
+ *
+ * ifconfig bond0 down
+ * will release all slaves, marking them as down.
+ *
+ * ifenslave bond0 eth0
+ * will attach eth0 to bond0 as a slave. eth0 hw mac address will either
+ * a: be used as initial mac address
+ * b: if a hw mac address already is there, eth0's hw mac address
+ * will then be set from bond0.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <net/ip.h>
+#include <linux/ip.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/socket.h>
+#include <linux/ctype.h>
+#include <linux/inet.h>
+#include <linux/bitops.h>
+#include <linux/io.h>
+#include <asm/dma.h>
+#include <linux/uaccess.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
+#include <linux/igmp.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <linux/rtnetlink.h>
+#include <linux/smp.h>
+#include <linux/if_ether.h>
+#include <net/arp.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/if_vlan.h>
+#include <linux/if_bonding.h>
+#include <linux/jiffies.h>
+#include <linux/preempt.h>
+#include <net/route.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+#include <net/pkt_sched.h>
+#include <linux/rculist.h>
+#include <net/flow_dissector.h>
+#include <net/switchdev.h>
+#include <net/bonding.h>
+#include <net/bond_3ad.h>
+#include <net/bond_alb.h>
+
+#include "bonding_priv.h"
+
+/*---------------------------- Module parameters ----------------------------*/
+
+/* monitor all links that often (in milliseconds). <=0 disables monitoring */
+
+static int max_bonds = BOND_DEFAULT_MAX_BONDS;
+static int tx_queues = BOND_DEFAULT_TX_QUEUES;
+static int num_peer_notif = 1;
+static int miimon;
+static int updelay;
+static int downdelay;
+static int use_carrier = 1;
+static char *mode;
+static char *primary;
+static char *primary_reselect;
+static char *lacp_rate;
+static int min_links;
+static char *ad_select;
+static char *xmit_hash_policy;
+static int arp_interval;
+static char *arp_ip_target[BOND_MAX_ARP_TARGETS];
+static char *arp_validate;
+static char *arp_all_targets;
+static char *fail_over_mac;
+static int all_slaves_active;
+static struct bond_params bonding_defaults;
+static int resend_igmp = BOND_DEFAULT_RESEND_IGMP;
+static int packets_per_slave = 1;
+static int lp_interval = BOND_ALB_DEFAULT_LP_INTERVAL;
+
+module_param(max_bonds, int, 0);
+MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
+module_param(tx_queues, int, 0);
+MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)");
+module_param_named(num_grat_arp, num_peer_notif, int, 0644);
+MODULE_PARM_DESC(num_grat_arp, "Number of peer notifications to send on "
+ "failover event (alias of num_unsol_na)");
+module_param_named(num_unsol_na, num_peer_notif, int, 0644);
+MODULE_PARM_DESC(num_unsol_na, "Number of peer notifications to send on "
+ "failover event (alias of num_grat_arp)");
+module_param(miimon, int, 0);
+MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
+module_param(updelay, int, 0);
+MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
+module_param(downdelay, int, 0);
+MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
+ "in milliseconds");
+module_param(use_carrier, int, 0);
+MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
+ "0 for off, 1 for on (default)");
+module_param(mode, charp, 0);
+MODULE_PARM_DESC(mode, "Mode of operation; 0 for balance-rr, "
+ "1 for active-backup, 2 for balance-xor, "
+ "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
+ "6 for balance-alb");
+module_param(primary, charp, 0);
+MODULE_PARM_DESC(primary, "Primary network device to use");
+module_param(primary_reselect, charp, 0);
+MODULE_PARM_DESC(primary_reselect, "Reselect primary slave "
+ "once it comes up; "
+ "0 for always (default), "
+ "1 for only if speed of primary is "
+ "better, "
+ "2 for only on active slave "
+ "failure");
+module_param(lacp_rate, charp, 0);
+MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner; "
+ "0 for slow, 1 for fast");
+module_param(ad_select, charp, 0);
+MODULE_PARM_DESC(ad_select, "802.3ad aggregation selection logic; "
+ "0 for stable (default), 1 for bandwidth, "
+ "2 for count");
+module_param(min_links, int, 0);
+MODULE_PARM_DESC(min_links, "Minimum number of available links before turning on carrier");
+
+module_param(xmit_hash_policy, charp, 0);
+MODULE_PARM_DESC(xmit_hash_policy, "balance-alb, balance-tlb, balance-xor, 802.3ad hashing method; "
+ "0 for layer 2 (default), 1 for layer 3+4, "
+ "2 for layer 2+3, 3 for encap layer 2+3, "
+ "4 for encap layer 3+4");
+module_param(arp_interval, int, 0);
+MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
+module_param_array(arp_ip_target, charp, NULL, 0);
+MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
+module_param(arp_validate, charp, 0);
+MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes; "
+ "0 for none (default), 1 for active, "
+ "2 for backup, 3 for all");
+module_param(arp_all_targets, charp, 0);
+MODULE_PARM_DESC(arp_all_targets, "fail on any/all arp targets timeout; 0 for any (default), 1 for all");
+module_param(fail_over_mac, charp, 0);
+MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to "
+ "the same MAC; 0 for none (default), "
+ "1 for active, 2 for follow");
+module_param(all_slaves_active, int, 0);
+MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface "
+ "by setting active flag for all slaves; "
+ "0 for never (default), 1 for always.");
+module_param(resend_igmp, int, 0);
+MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on "
+ "link failure");
+module_param(packets_per_slave, int, 0);
+MODULE_PARM_DESC(packets_per_slave, "Packets to send per slave in balance-rr "
+ "mode; 0 for a random slave, 1 packet per "
+ "slave (default), >1 packets per slave.");
+module_param(lp_interval, uint, 0);
+MODULE_PARM_DESC(lp_interval, "The number of seconds between instances where "
+ "the bonding driver sends learning packets to "
+ "each slaves peer switch. The default is 1.");
+
+/*----------------------------- Global variables ----------------------------*/
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+atomic_t netpoll_block_tx = ATOMIC_INIT(0);
+#endif
+
+unsigned int bond_net_id __read_mostly;
+
+/*-------------------------- Forward declarations ---------------------------*/
+
+static int bond_init(struct net_device *bond_dev);
+static void bond_uninit(struct net_device *bond_dev);
+static void bond_get_stats(struct net_device *bond_dev,
+ struct rtnl_link_stats64 *stats);
+static void bond_slave_arr_handler(struct work_struct *work);
+static bool bond_time_in_interval(struct bonding *bond, unsigned long last_act,
+ int mod);
+static void bond_netdev_notify_work(struct work_struct *work);
+
+/*---------------------------- General routines -----------------------------*/
+
+const char *bond_mode_name(int mode)
+{
+ static const char *names[] = {
+ [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)",
+ [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)",
+ [BOND_MODE_XOR] = "load balancing (xor)",
+ [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)",
+ [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation",
+ [BOND_MODE_TLB] = "transmit load balancing",
+ [BOND_MODE_ALB] = "adaptive load balancing",
+ };
+
+ if (mode < BOND_MODE_ROUNDROBIN || mode > BOND_MODE_ALB)
+ return "unknown";
+
+ return names[mode];
+}
+
+/*---------------------------------- VLAN -----------------------------------*/
+
+/**
+ * bond_dev_queue_xmit - Prepare skb for xmit.
+ *
+ * @bond: bond device that got this skb for tx.
+ * @skb: hw accel VLAN tagged skb to transmit
+ * @slave_dev: slave that is supposed to xmit this skbuff
+ */
+void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
+ struct net_device *slave_dev)
+{
+ skb->dev = slave_dev;
+
+ BUILD_BUG_ON(sizeof(skb->queue_mapping) !=
+ sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping));
+ skb_set_queue_mapping(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping);
+
+ if (unlikely(netpoll_tx_running(bond->dev)))
+ bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb);
+ else
+ dev_queue_xmit(skb);
+}
+
+/* In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid,
+ * We don't protect the slave list iteration with a lock because:
+ * a. This operation is performed in IOCTL context,
+ * b. The operation is protected by the RTNL semaphore in the 8021q code,
+ * c. Holding a lock with BH disabled while directly calling a base driver
+ * entry point is generally a BAD idea.
+ *
+ * The design of synchronization/protection for this operation in the 8021q
+ * module is good for one or more VLAN devices over a single physical device
+ * and cannot be extended for a teaming solution like bonding, so there is a
+ * potential race condition here where a net device from the vlan group might
+ * be referenced (either by a base driver or the 8021q code) while it is being
+ * removed from the system. However, it turns out we're not making matters
+ * worse, and if it works for regular VLAN usage it will work here too.
+*/
+
+/**
+ * bond_vlan_rx_add_vid - Propagates adding an id to slaves
+ * @bond_dev: bonding net device that got called
+ * @vid: vlan id being added
+ */
+static int bond_vlan_rx_add_vid(struct net_device *bond_dev,
+ __be16 proto, u16 vid)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave, *rollback_slave;
+ struct list_head *iter;
+ int res;
+
+ bond_for_each_slave(bond, slave, iter) {
+ res = vlan_vid_add(slave->dev, proto, vid);
+ if (res)
+ goto unwind;
+ }
+
+ return 0;
+
+unwind:
+ /* unwind to the slave that failed */
+ bond_for_each_slave(bond, rollback_slave, iter) {
+ if (rollback_slave == slave)
+ break;
+
+ vlan_vid_del(rollback_slave->dev, proto, vid);
+ }
+
+ return res;
+}
+
+/**
+ * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
+ * @bond_dev: bonding net device that got called
+ * @vid: vlan id being removed
+ */
+static int bond_vlan_rx_kill_vid(struct net_device *bond_dev,
+ __be16 proto, u16 vid)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct list_head *iter;
+ struct slave *slave;
+
+ bond_for_each_slave(bond, slave, iter)
+ vlan_vid_del(slave->dev, proto, vid);
+
+ if (bond_is_lb(bond))
+ bond_alb_clear_vlan(bond, vid);
+
+ return 0;
+}
+
+/*------------------------------- Link status -------------------------------*/
+
+/* Set the carrier state for the master according to the state of its
+ * slaves. If any slaves are up, the master is up. In 802.3ad mode,
+ * do special 802.3ad magic.
+ *
+ * Returns zero if carrier state does not change, nonzero if it does.
+ */
+int bond_set_carrier(struct bonding *bond)
+{
+ struct list_head *iter;
+ struct slave *slave;
+
+ if (!bond_has_slaves(bond))
+ goto down;
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD)
+ return bond_3ad_set_carrier(bond);
+
+ bond_for_each_slave(bond, slave, iter) {
+ if (slave->link == BOND_LINK_UP) {
+ if (!netif_carrier_ok(bond->dev)) {
+ netif_carrier_on(bond->dev);
+ return 1;
+ }
+ return 0;
+ }
+ }
+
+down:
+ if (netif_carrier_ok(bond->dev)) {
+ netif_carrier_off(bond->dev);
+ return 1;
+ }
+ return 0;
+}
+
+/* Get link speed and duplex from the slave's base driver
+ * using ethtool. If for some reason the call fails or the
+ * values are invalid, set speed and duplex to -1,
+ * and return. Return 1 if speed or duplex settings are
+ * UNKNOWN; 0 otherwise.
+ */
+static int bond_update_speed_duplex(struct slave *slave)
+{
+ struct net_device *slave_dev = slave->dev;
+ struct ethtool_link_ksettings ecmd;
+ int res;
+
+ slave->speed = SPEED_UNKNOWN;
+ slave->duplex = DUPLEX_UNKNOWN;
+
+ res = __ethtool_get_link_ksettings(slave_dev, &ecmd);
+ if (res < 0)
+ return 1;
+ if (ecmd.base.speed == 0 || ecmd.base.speed == ((__u32)-1))
+ return 1;
+ switch (ecmd.base.duplex) {
+ case DUPLEX_FULL:
+ case DUPLEX_HALF:
+ break;
+ default:
+ return 1;
+ }
+
+ slave->speed = ecmd.base.speed;
+ slave->duplex = ecmd.base.duplex;
+
+ return 0;
+}
+
+const char *bond_slave_link_status(s8 link)
+{
+ switch (link) {
+ case BOND_LINK_UP:
+ return "up";
+ case BOND_LINK_FAIL:
+ return "going down";
+ case BOND_LINK_DOWN:
+ return "down";
+ case BOND_LINK_BACK:
+ return "going back";
+ default:
+ return "unknown";
+ }
+}
+
+/* if <dev> supports MII link status reporting, check its link status.
+ *
+ * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
+ * depending upon the setting of the use_carrier parameter.
+ *
+ * Return either BMSR_LSTATUS, meaning that the link is up (or we
+ * can't tell and just pretend it is), or 0, meaning that the link is
+ * down.
+ *
+ * If reporting is non-zero, instead of faking link up, return -1 if
+ * both ETHTOOL and MII ioctls fail (meaning the device does not
+ * support them). If use_carrier is set, return whatever it says.
+ * It'd be nice if there was a good way to tell if a driver supports
+ * netif_carrier, but there really isn't.
+ */
+static int bond_check_dev_link(struct bonding *bond,
+ struct net_device *slave_dev, int reporting)
+{
+ const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
+ int (*ioctl)(struct net_device *, struct ifreq *, int);
+ struct ifreq ifr;
+ struct mii_ioctl_data *mii;
+
+ if (!reporting && !netif_running(slave_dev))
+ return 0;
+
+ if (bond->params.use_carrier)
+ return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
+
+ /* Try to get link status using Ethtool first. */
+ if (slave_dev->ethtool_ops->get_link)
+ return slave_dev->ethtool_ops->get_link(slave_dev) ?
+ BMSR_LSTATUS : 0;
+
+ /* Ethtool can't be used, fallback to MII ioctls. */
+ ioctl = slave_ops->ndo_do_ioctl;
+ if (ioctl) {
+ /* TODO: set pointer to correct ioctl on a per team member
+ * bases to make this more efficient. that is, once
+ * we determine the correct ioctl, we will always
+ * call it and not the others for that team
+ * member.
+ */
+
+ /* We cannot assume that SIOCGMIIPHY will also read a
+ * register; not all network drivers (e.g., e100)
+ * support that.
+ */
+
+ /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
+ strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
+ mii = if_mii(&ifr);
+ if (ioctl(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
+ mii->reg_num = MII_BMSR;
+ if (ioctl(slave_dev, &ifr, SIOCGMIIREG) == 0)
+ return mii->val_out & BMSR_LSTATUS;
+ }
+ }
+
+ /* If reporting, report that either there's no dev->do_ioctl,
+ * or both SIOCGMIIREG and get_link failed (meaning that we
+ * cannot report link status). If not reporting, pretend
+ * we're ok.
+ */
+ return reporting ? -1 : BMSR_LSTATUS;
+}
+
+/*----------------------------- Multicast list ------------------------------*/
+
+/* Push the promiscuity flag down to appropriate slaves */
+static int bond_set_promiscuity(struct bonding *bond, int inc)
+{
+ struct list_head *iter;
+ int err = 0;
+
+ if (bond_uses_primary(bond)) {
+ struct slave *curr_active = rtnl_dereference(bond->curr_active_slave);
+
+ if (curr_active)
+ err = dev_set_promiscuity(curr_active->dev, inc);
+ } else {
+ struct slave *slave;
+
+ bond_for_each_slave(bond, slave, iter) {
+ err = dev_set_promiscuity(slave->dev, inc);
+ if (err)
+ return err;
+ }
+ }
+ return err;
+}
+
+/* Push the allmulti flag down to all slaves */
+static int bond_set_allmulti(struct bonding *bond, int inc)
+{
+ struct list_head *iter;
+ int err = 0;
+
+ if (bond_uses_primary(bond)) {
+ struct slave *curr_active = rtnl_dereference(bond->curr_active_slave);
+
+ if (curr_active)
+ err = dev_set_allmulti(curr_active->dev, inc);
+ } else {
+ struct slave *slave;
+
+ bond_for_each_slave(bond, slave, iter) {
+ err = dev_set_allmulti(slave->dev, inc);
+ if (err)
+ return err;
+ }
+ }
+ return err;
+}
+
+/* Retrieve the list of registered multicast addresses for the bonding
+ * device and retransmit an IGMP JOIN request to the current active
+ * slave.
+ */
+static void bond_resend_igmp_join_requests_delayed(struct work_struct *work)
+{
+ struct bonding *bond = container_of(work, struct bonding,
+ mcast_work.work);
+
+ if (!rtnl_trylock()) {
+ queue_delayed_work(bond->wq, &bond->mcast_work, 1);
+ return;
+ }
+ call_netdevice_notifiers(NETDEV_RESEND_IGMP, bond->dev);
+
+ if (bond->igmp_retrans > 1) {
+ bond->igmp_retrans--;
+ queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5);
+ }
+ rtnl_unlock();
+}
+
+/* Flush bond's hardware addresses from slave */
+static void bond_hw_addr_flush(struct net_device *bond_dev,
+ struct net_device *slave_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+
+ dev_uc_unsync(slave_dev, bond_dev);
+ dev_mc_unsync(slave_dev, bond_dev);
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+ /* del lacpdu mc addr from mc list */
+ u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
+
+ dev_mc_del(slave_dev, lacpdu_multicast);
+ }
+}
+
+/*--------------------------- Active slave change ---------------------------*/
+
+/* Update the hardware address list and promisc/allmulti for the new and
+ * old active slaves (if any). Modes that are not using primary keep all
+ * slaves up date at all times; only the modes that use primary need to call
+ * this function to swap these settings during a failover.
+ */
+static void bond_hw_addr_swap(struct bonding *bond, struct slave *new_active,
+ struct slave *old_active)
+{
+ if (old_active) {
+ if (bond->dev->flags & IFF_PROMISC)
+ dev_set_promiscuity(old_active->dev, -1);
+
+ if (bond->dev->flags & IFF_ALLMULTI)
+ dev_set_allmulti(old_active->dev, -1);
+
+ bond_hw_addr_flush(bond->dev, old_active->dev);
+ }
+
+ if (new_active) {
+ /* FIXME: Signal errors upstream. */
+ if (bond->dev->flags & IFF_PROMISC)
+ dev_set_promiscuity(new_active->dev, 1);
+
+ if (bond->dev->flags & IFF_ALLMULTI)
+ dev_set_allmulti(new_active->dev, 1);
+
+ netif_addr_lock_bh(bond->dev);
+ dev_uc_sync(new_active->dev, bond->dev);
+ dev_mc_sync(new_active->dev, bond->dev);
+ netif_addr_unlock_bh(bond->dev);
+ }
+}
+
+/**
+ * bond_set_dev_addr - clone slave's address to bond
+ * @bond_dev: bond net device
+ * @slave_dev: slave net device
+ *
+ * Should be called with RTNL held.
+ */
+static void bond_set_dev_addr(struct net_device *bond_dev,
+ struct net_device *slave_dev)
+{
+ netdev_dbg(bond_dev, "bond_dev=%p slave_dev=%p slave_dev->name=%s slave_dev->addr_len=%d\n",
+ bond_dev, slave_dev, slave_dev->name, slave_dev->addr_len);
+ memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
+ bond_dev->addr_assign_type = NET_ADDR_STOLEN;
+ call_netdevice_notifiers(NETDEV_CHANGEADDR, bond_dev);
+}
+
+static struct slave *bond_get_old_active(struct bonding *bond,
+ struct slave *new_active)
+{
+ struct slave *slave;
+ struct list_head *iter;
+
+ bond_for_each_slave(bond, slave, iter) {
+ if (slave == new_active)
+ continue;
+
+ if (ether_addr_equal(bond->dev->dev_addr, slave->dev->dev_addr))
+ return slave;
+ }
+
+ return NULL;
+}
+
+/* bond_do_fail_over_mac
+ *
+ * Perform special MAC address swapping for fail_over_mac settings
+ *
+ * Called with RTNL
+ */
+static void bond_do_fail_over_mac(struct bonding *bond,
+ struct slave *new_active,
+ struct slave *old_active)
+{
+ u8 tmp_mac[MAX_ADDR_LEN];
+ struct sockaddr_storage ss;
+ int rv;
+
+ switch (bond->params.fail_over_mac) {
+ case BOND_FOM_ACTIVE:
+ if (new_active)
+ bond_set_dev_addr(bond->dev, new_active->dev);
+ break;
+ case BOND_FOM_FOLLOW:
+ /* if new_active && old_active, swap them
+ * if just old_active, do nothing (going to no active slave)
+ * if just new_active, set new_active to bond's MAC
+ */
+ if (!new_active)
+ return;
+
+ if (!old_active)
+ old_active = bond_get_old_active(bond, new_active);
+
+ if (old_active) {
+ bond_hw_addr_copy(tmp_mac, new_active->dev->dev_addr,
+ new_active->dev->addr_len);
+ bond_hw_addr_copy(ss.__data,
+ old_active->dev->dev_addr,
+ old_active->dev->addr_len);
+ ss.ss_family = new_active->dev->type;
+ } else {
+ bond_hw_addr_copy(ss.__data, bond->dev->dev_addr,
+ bond->dev->addr_len);
+ ss.ss_family = bond->dev->type;
+ }
+
+ rv = dev_set_mac_address(new_active->dev,
+ (struct sockaddr *)&ss);
+ if (rv) {
+ netdev_err(bond->dev, "Error %d setting MAC of slave %s\n",
+ -rv, new_active->dev->name);
+ goto out;
+ }
+
+ if (!old_active)
+ goto out;
+
+ bond_hw_addr_copy(ss.__data, tmp_mac,
+ new_active->dev->addr_len);
+ ss.ss_family = old_active->dev->type;
+
+ rv = dev_set_mac_address(old_active->dev,
+ (struct sockaddr *)&ss);
+ if (rv)
+ netdev_err(bond->dev, "Error %d setting MAC of slave %s\n",
+ -rv, new_active->dev->name);
+out:
+ break;
+ default:
+ netdev_err(bond->dev, "bond_do_fail_over_mac impossible: bad policy %d\n",
+ bond->params.fail_over_mac);
+ break;
+ }
+
+}
+
+static struct slave *bond_choose_primary_or_current(struct bonding *bond)
+{
+ struct slave *prim = rtnl_dereference(bond->primary_slave);
+ struct slave *curr = rtnl_dereference(bond->curr_active_slave);
+
+ if (!prim || prim->link != BOND_LINK_UP) {
+ if (!curr || curr->link != BOND_LINK_UP)
+ return NULL;
+ return curr;
+ }
+
+ if (bond->force_primary) {
+ bond->force_primary = false;
+ return prim;
+ }
+
+ if (!curr || curr->link != BOND_LINK_UP)
+ return prim;
+
+ /* At this point, prim and curr are both up */
+ switch (bond->params.primary_reselect) {
+ case BOND_PRI_RESELECT_ALWAYS:
+ return prim;
+ case BOND_PRI_RESELECT_BETTER:
+ if (prim->speed < curr->speed)
+ return curr;
+ if (prim->speed == curr->speed && prim->duplex <= curr->duplex)
+ return curr;
+ return prim;
+ case BOND_PRI_RESELECT_FAILURE:
+ return curr;
+ default:
+ netdev_err(bond->dev, "impossible primary_reselect %d\n",
+ bond->params.primary_reselect);
+ return curr;
+ }
+}
+
+/**
+ * bond_find_best_slave - select the best available slave to be the active one
+ * @bond: our bonding struct
+ */
+static struct slave *bond_find_best_slave(struct bonding *bond)
+{
+ struct slave *slave, *bestslave = NULL;
+ struct list_head *iter;
+ int mintime = bond->params.updelay;
+
+ slave = bond_choose_primary_or_current(bond);
+ if (slave)
+ return slave;
+
+ bond_for_each_slave(bond, slave, iter) {
+ if (slave->link == BOND_LINK_UP)
+ return slave;
+ if (slave->link == BOND_LINK_BACK && bond_slave_is_up(slave) &&
+ slave->delay < mintime) {
+ mintime = slave->delay;
+ bestslave = slave;
+ }
+ }
+
+ return bestslave;
+}
+
+static bool bond_should_notify_peers(struct bonding *bond)
+{
+ struct slave *slave;
+
+ rcu_read_lock();
+ slave = rcu_dereference(bond->curr_active_slave);
+ rcu_read_unlock();
+
+ netdev_dbg(bond->dev, "bond_should_notify_peers: slave %s\n",
+ slave ? slave->dev->name : "NULL");
+
+ if (!slave || !bond->send_peer_notif ||
+ !netif_carrier_ok(bond->dev) ||
+ test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
+ return false;
+
+ return true;
+}
+
+/**
+ * change_active_interface - change the active slave into the specified one
+ * @bond: our bonding struct
+ * @new: the new slave to make the active one
+ *
+ * Set the new slave to the bond's settings and unset them on the old
+ * curr_active_slave.
+ * Setting include flags, mc-list, promiscuity, allmulti, etc.
+ *
+ * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
+ * because it is apparently the best available slave we have, even though its
+ * updelay hasn't timed out yet.
+ *
+ * Caller must hold RTNL.
+ */
+void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
+{
+ struct slave *old_active;
+
+ ASSERT_RTNL();
+
+ old_active = rtnl_dereference(bond->curr_active_slave);
+
+ if (old_active == new_active)
+ return;
+
+ if (new_active) {
+ new_active->last_link_up = jiffies;
+
+ if (new_active->link == BOND_LINK_BACK) {
+ if (bond_uses_primary(bond)) {
+ netdev_info(bond->dev, "making interface %s the new active one %d ms earlier\n",
+ new_active->dev->name,
+ (bond->params.updelay - new_active->delay) * bond->params.miimon);
+ }
+
+ new_active->delay = 0;
+ bond_set_slave_link_state(new_active, BOND_LINK_UP,
+ BOND_SLAVE_NOTIFY_NOW);
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD)
+ bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
+
+ if (bond_is_lb(bond))
+ bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
+ } else {
+ if (bond_uses_primary(bond)) {
+ netdev_info(bond->dev, "making interface %s the new active one\n",
+ new_active->dev->name);
+ }
+ }
+ }
+
+ if (bond_uses_primary(bond))
+ bond_hw_addr_swap(bond, new_active, old_active);
+
+ if (bond_is_lb(bond)) {
+ bond_alb_handle_active_change(bond, new_active);
+ if (old_active)
+ bond_set_slave_inactive_flags(old_active,
+ BOND_SLAVE_NOTIFY_NOW);
+ if (new_active)
+ bond_set_slave_active_flags(new_active,
+ BOND_SLAVE_NOTIFY_NOW);
+ } else {
+ rcu_assign_pointer(bond->curr_active_slave, new_active);
+ }
+
+ if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) {
+ if (old_active)
+ bond_set_slave_inactive_flags(old_active,
+ BOND_SLAVE_NOTIFY_NOW);
+
+ if (new_active) {
+ bool should_notify_peers = false;
+
+ bond_set_slave_active_flags(new_active,
+ BOND_SLAVE_NOTIFY_NOW);
+
+ if (bond->params.fail_over_mac)
+ bond_do_fail_over_mac(bond, new_active,
+ old_active);
+
+ if (netif_running(bond->dev)) {
+ bond->send_peer_notif =
+ bond->params.num_peer_notif;
+ should_notify_peers =
+ bond_should_notify_peers(bond);
+ }
+
+ call_netdevice_notifiers(NETDEV_BONDING_FAILOVER, bond->dev);
+ if (should_notify_peers)
+ call_netdevice_notifiers(NETDEV_NOTIFY_PEERS,
+ bond->dev);
+ }
+ }
+
+ /* resend IGMP joins since active slave has changed or
+ * all were sent on curr_active_slave.
+ * resend only if bond is brought up with the affected
+ * bonding modes and the retransmission is enabled
+ */
+ if (netif_running(bond->dev) && (bond->params.resend_igmp > 0) &&
+ ((bond_uses_primary(bond) && new_active) ||
+ BOND_MODE(bond) == BOND_MODE_ROUNDROBIN)) {
+ bond->igmp_retrans = bond->params.resend_igmp;
+ queue_delayed_work(bond->wq, &bond->mcast_work, 1);
+ }
+}
+
+/**
+ * bond_select_active_slave - select a new active slave, if needed
+ * @bond: our bonding struct
+ *
+ * This functions should be called when one of the following occurs:
+ * - The old curr_active_slave has been released or lost its link.
+ * - The primary_slave has got its link back.
+ * - A slave has got its link back and there's no old curr_active_slave.
+ *
+ * Caller must hold RTNL.
+ */
+void bond_select_active_slave(struct bonding *bond)
+{
+ struct slave *best_slave;
+ int rv;
+
+ ASSERT_RTNL();
+
+ best_slave = bond_find_best_slave(bond);
+ if (best_slave != rtnl_dereference(bond->curr_active_slave)) {
+ bond_change_active_slave(bond, best_slave);
+ rv = bond_set_carrier(bond);
+ if (!rv)
+ return;
+
+ if (netif_carrier_ok(bond->dev))
+ netdev_info(bond->dev, "first active interface up!\n");
+ else
+ netdev_info(bond->dev, "now running without any active interface!\n");
+ }
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static inline int slave_enable_netpoll(struct slave *slave)
+{
+ struct netpoll *np;
+ int err = 0;
+
+ np = kzalloc(sizeof(*np), GFP_KERNEL);
+ err = -ENOMEM;
+ if (!np)
+ goto out;
+
+ err = __netpoll_setup(np, slave->dev);
+ if (err) {
+ kfree(np);
+ goto out;
+ }
+ slave->np = np;
+out:
+ return err;
+}
+static inline void slave_disable_netpoll(struct slave *slave)
+{
+ struct netpoll *np = slave->np;
+
+ if (!np)
+ return;
+
+ slave->np = NULL;
+ __netpoll_free_async(np);
+}
+
+static void bond_poll_controller(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave = NULL;
+ struct list_head *iter;
+ struct ad_info ad_info;
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD)
+ if (bond_3ad_get_active_agg_info(bond, &ad_info))
+ return;
+
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ if (!bond_slave_is_up(slave))
+ continue;
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+ struct aggregator *agg =
+ SLAVE_AD_INFO(slave)->port.aggregator;
+
+ if (agg &&
+ agg->aggregator_identifier != ad_info.aggregator_id)
+ continue;
+ }
+
+ netpoll_poll_dev(slave->dev);
+ }
+}
+
+static void bond_netpoll_cleanup(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct list_head *iter;
+ struct slave *slave;
+
+ bond_for_each_slave(bond, slave, iter)
+ if (bond_slave_is_up(slave))
+ slave_disable_netpoll(slave);
+}
+
+static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni)
+{
+ struct bonding *bond = netdev_priv(dev);
+ struct list_head *iter;
+ struct slave *slave;
+ int err = 0;
+
+ bond_for_each_slave(bond, slave, iter) {
+ err = slave_enable_netpoll(slave);
+ if (err) {
+ bond_netpoll_cleanup(dev);
+ break;
+ }
+ }
+ return err;
+}
+#else
+static inline int slave_enable_netpoll(struct slave *slave)
+{
+ return 0;
+}
+static inline void slave_disable_netpoll(struct slave *slave)
+{
+}
+static void bond_netpoll_cleanup(struct net_device *bond_dev)
+{
+}
+#endif
+
+/*---------------------------------- IOCTL ----------------------------------*/
+
+static netdev_features_t bond_fix_features(struct net_device *dev,
+ netdev_features_t features)
+{
+ struct bonding *bond = netdev_priv(dev);
+ struct list_head *iter;
+ netdev_features_t mask;
+ struct slave *slave;
+
+ mask = features;
+
+ features &= ~NETIF_F_ONE_FOR_ALL;
+ features |= NETIF_F_ALL_FOR_ALL;
+
+ bond_for_each_slave(bond, slave, iter) {
+ features = netdev_increment_features(features,
+ slave->dev->features,
+ mask);
+ }
+ features = netdev_add_tso_features(features, mask);
+
+ return features;
+}
+
+#define BOND_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
+ NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
+ NETIF_F_HIGHDMA | NETIF_F_LRO)
+
+#define BOND_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
+ NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
+
+static void bond_compute_features(struct bonding *bond)
+{
+ unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
+ IFF_XMIT_DST_RELEASE_PERM;
+ netdev_features_t vlan_features = BOND_VLAN_FEATURES;
+ netdev_features_t enc_features = BOND_ENC_FEATURES;
+ struct net_device *bond_dev = bond->dev;
+ struct list_head *iter;
+ struct slave *slave;
+ unsigned short max_hard_header_len = ETH_HLEN;
+ unsigned int gso_max_size = GSO_MAX_SIZE;
+ u16 gso_max_segs = GSO_MAX_SEGS;
+
+ if (!bond_has_slaves(bond))
+ goto done;
+ vlan_features &= NETIF_F_ALL_FOR_ALL;
+
+ bond_for_each_slave(bond, slave, iter) {
+ vlan_features = netdev_increment_features(vlan_features,
+ slave->dev->vlan_features, BOND_VLAN_FEATURES);
+
+ enc_features = netdev_increment_features(enc_features,
+ slave->dev->hw_enc_features,
+ BOND_ENC_FEATURES);
+ dst_release_flag &= slave->dev->priv_flags;
+ if (slave->dev->hard_header_len > max_hard_header_len)
+ max_hard_header_len = slave->dev->hard_header_len;
+
+ gso_max_size = min(gso_max_size, slave->dev->gso_max_size);
+ gso_max_segs = min(gso_max_segs, slave->dev->gso_max_segs);
+ }
+ bond_dev->hard_header_len = max_hard_header_len;
+
+done:
+ bond_dev->vlan_features = vlan_features;
+ bond_dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
+ NETIF_F_GSO_UDP_L4;
+ bond_dev->gso_max_segs = gso_max_segs;
+ netif_set_gso_max_size(bond_dev, gso_max_size);
+
+ bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
+ if ((bond_dev->priv_flags & IFF_XMIT_DST_RELEASE_PERM) &&
+ dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
+ bond_dev->priv_flags |= IFF_XMIT_DST_RELEASE;
+
+ netdev_change_features(bond_dev);
+}
+
+static void bond_setup_by_slave(struct net_device *bond_dev,
+ struct net_device *slave_dev)
+{
+ bond_dev->header_ops = slave_dev->header_ops;
+
+ bond_dev->type = slave_dev->type;
+ bond_dev->hard_header_len = slave_dev->hard_header_len;
+ bond_dev->addr_len = slave_dev->addr_len;
+
+ memcpy(bond_dev->broadcast, slave_dev->broadcast,
+ slave_dev->addr_len);
+}
+
+/* On bonding slaves other than the currently active slave, suppress
+ * duplicates except for alb non-mcast/bcast.
+ */
+static bool bond_should_deliver_exact_match(struct sk_buff *skb,
+ struct slave *slave,
+ struct bonding *bond)
+{
+ if (bond_is_slave_inactive(slave)) {
+ if (BOND_MODE(bond) == BOND_MODE_ALB &&
+ skb->pkt_type != PACKET_BROADCAST &&
+ skb->pkt_type != PACKET_MULTICAST)
+ return false;
+ return true;
+ }
+ return false;
+}
+
+static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb)
+{
+ struct sk_buff *skb = *pskb;
+ struct slave *slave;
+ struct bonding *bond;
+ int (*recv_probe)(const struct sk_buff *, struct bonding *,
+ struct slave *);
+ int ret = RX_HANDLER_ANOTHER;
+
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (unlikely(!skb))
+ return RX_HANDLER_CONSUMED;
+
+ *pskb = skb;
+
+ slave = bond_slave_get_rcu(skb->dev);
+ bond = slave->bond;
+
+ recv_probe = READ_ONCE(bond->recv_probe);
+ if (recv_probe) {
+ ret = recv_probe(skb, bond, slave);
+ if (ret == RX_HANDLER_CONSUMED) {
+ consume_skb(skb);
+ return ret;
+ }
+ }
+
+ /* Link-local multicast packets should be passed to the
+ * stack on the link they arrive as well as pass them to the
+ * bond-master device. These packets are mostly usable when
+ * stack receives it with the link on which they arrive
+ * (e.g. LLDP) they also must be available on master. Some of
+ * the use cases include (but are not limited to): LLDP agents
+ * that must be able to operate both on enslaved interfaces as
+ * well as on bonds themselves; linux bridges that must be able
+ * to process/pass BPDUs from attached bonds when any kind of
+ * STP version is enabled on the network.
+ */
+ if (is_link_local_ether_addr(eth_hdr(skb)->h_dest)) {
+ struct sk_buff *nskb = skb_clone(skb, GFP_ATOMIC);
+
+ if (nskb) {
+ nskb->dev = bond->dev;
+ nskb->queue_mapping = 0;
+ netif_rx(nskb);
+ }
+ return RX_HANDLER_PASS;
+ }
+ if (bond_should_deliver_exact_match(skb, slave, bond))
+ return RX_HANDLER_EXACT;
+
+ skb->dev = bond->dev;
+
+ if (BOND_MODE(bond) == BOND_MODE_ALB &&
+ bond->dev->priv_flags & IFF_BRIDGE_PORT &&
+ skb->pkt_type == PACKET_HOST) {
+
+ if (unlikely(skb_cow_head(skb,
+ skb->data - skb_mac_header(skb)))) {
+ kfree_skb(skb);
+ return RX_HANDLER_CONSUMED;
+ }
+ bond_hw_addr_copy(eth_hdr(skb)->h_dest, bond->dev->dev_addr,
+ bond->dev->addr_len);
+ }
+
+ return ret;
+}
+
+static enum netdev_lag_tx_type bond_lag_tx_type(struct bonding *bond)
+{
+ switch (BOND_MODE(bond)) {
+ case BOND_MODE_ROUNDROBIN:
+ return NETDEV_LAG_TX_TYPE_ROUNDROBIN;
+ case BOND_MODE_ACTIVEBACKUP:
+ return NETDEV_LAG_TX_TYPE_ACTIVEBACKUP;
+ case BOND_MODE_BROADCAST:
+ return NETDEV_LAG_TX_TYPE_BROADCAST;
+ case BOND_MODE_XOR:
+ case BOND_MODE_8023AD:
+ return NETDEV_LAG_TX_TYPE_HASH;
+ default:
+ return NETDEV_LAG_TX_TYPE_UNKNOWN;
+ }
+}
+
+static enum netdev_lag_hash bond_lag_hash_type(struct bonding *bond,
+ enum netdev_lag_tx_type type)
+{
+ if (type != NETDEV_LAG_TX_TYPE_HASH)
+ return NETDEV_LAG_HASH_NONE;
+
+ switch (bond->params.xmit_policy) {
+ case BOND_XMIT_POLICY_LAYER2:
+ return NETDEV_LAG_HASH_L2;
+ case BOND_XMIT_POLICY_LAYER34:
+ return NETDEV_LAG_HASH_L34;
+ case BOND_XMIT_POLICY_LAYER23:
+ return NETDEV_LAG_HASH_L23;
+ case BOND_XMIT_POLICY_ENCAP23:
+ return NETDEV_LAG_HASH_E23;
+ case BOND_XMIT_POLICY_ENCAP34:
+ return NETDEV_LAG_HASH_E34;
+ default:
+ return NETDEV_LAG_HASH_UNKNOWN;
+ }
+}
+
+static int bond_master_upper_dev_link(struct bonding *bond, struct slave *slave,
+ struct netlink_ext_ack *extack)
+{
+ struct netdev_lag_upper_info lag_upper_info;
+ enum netdev_lag_tx_type type;
+
+ type = bond_lag_tx_type(bond);
+ lag_upper_info.tx_type = type;
+ lag_upper_info.hash_type = bond_lag_hash_type(bond, type);
+
+ return netdev_master_upper_dev_link(slave->dev, bond->dev, slave,
+ &lag_upper_info, extack);
+}
+
+static void bond_upper_dev_unlink(struct bonding *bond, struct slave *slave)
+{
+ netdev_upper_dev_unlink(slave->dev, bond->dev);
+ slave->dev->flags &= ~IFF_SLAVE;
+}
+
+static struct slave *bond_alloc_slave(struct bonding *bond)
+{
+ struct slave *slave = NULL;
+
+ slave = kzalloc(sizeof(*slave), GFP_KERNEL);
+ if (!slave)
+ return NULL;
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+ SLAVE_AD_INFO(slave) = kzalloc(sizeof(struct ad_slave_info),
+ GFP_KERNEL);
+ if (!SLAVE_AD_INFO(slave)) {
+ kfree(slave);
+ return NULL;
+ }
+ }
+ INIT_DELAYED_WORK(&slave->notify_work, bond_netdev_notify_work);
+
+ return slave;
+}
+
+static void bond_free_slave(struct slave *slave)
+{
+ struct bonding *bond = bond_get_bond_by_slave(slave);
+
+ cancel_delayed_work_sync(&slave->notify_work);
+ if (BOND_MODE(bond) == BOND_MODE_8023AD)
+ kfree(SLAVE_AD_INFO(slave));
+
+ kfree(slave);
+}
+
+static void bond_fill_ifbond(struct bonding *bond, struct ifbond *info)
+{
+ info->bond_mode = BOND_MODE(bond);
+ info->miimon = bond->params.miimon;
+ info->num_slaves = bond->slave_cnt;
+}
+
+static void bond_fill_ifslave(struct slave *slave, struct ifslave *info)
+{
+ strcpy(info->slave_name, slave->dev->name);
+ info->link = slave->link;
+ info->state = bond_slave_state(slave);
+ info->link_failure_count = slave->link_failure_count;
+}
+
+static void bond_netdev_notify_work(struct work_struct *_work)
+{
+ struct slave *slave = container_of(_work, struct slave,
+ notify_work.work);
+
+ if (rtnl_trylock()) {
+ struct netdev_bonding_info binfo;
+
+ bond_fill_ifslave(slave, &binfo.slave);
+ bond_fill_ifbond(slave->bond, &binfo.master);
+ netdev_bonding_info_change(slave->dev, &binfo);
+ rtnl_unlock();
+ } else {
+ queue_delayed_work(slave->bond->wq, &slave->notify_work, 1);
+ }
+}
+
+void bond_queue_slave_event(struct slave *slave)
+{
+ queue_delayed_work(slave->bond->wq, &slave->notify_work, 0);
+}
+
+void bond_lower_state_changed(struct slave *slave)
+{
+ struct netdev_lag_lower_state_info info;
+
+ info.link_up = slave->link == BOND_LINK_UP ||
+ slave->link == BOND_LINK_FAIL;
+ info.tx_enabled = bond_is_active_slave(slave);
+ netdev_lower_state_changed(slave->dev, &info);
+}
+
+/* enslave device <slave> to bond device <master> */
+int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
+ struct netlink_ext_ack *extack)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
+ struct slave *new_slave = NULL, *prev_slave;
+ struct sockaddr_storage ss;
+ int link_reporting;
+ int res = 0, i;
+
+ if (!bond->params.use_carrier &&
+ slave_dev->ethtool_ops->get_link == NULL &&
+ slave_ops->ndo_do_ioctl == NULL) {
+ netdev_warn(bond_dev, "no link monitoring support for %s\n",
+ slave_dev->name);
+ }
+
+ /* already in-use? */
+ if (netdev_is_rx_handler_busy(slave_dev)) {
+ NL_SET_ERR_MSG(extack, "Device is in use and cannot be enslaved");
+ netdev_err(bond_dev,
+ "Error: Device is in use and cannot be enslaved\n");
+ return -EBUSY;
+ }
+
+ if (bond_dev == slave_dev) {
+ NL_SET_ERR_MSG(extack, "Cannot enslave bond to itself.");
+ netdev_err(bond_dev, "cannot enslave bond to itself.\n");
+ return -EPERM;
+ }
+
+ /* vlan challenged mutual exclusion */
+ /* no need to lock since we're protected by rtnl_lock */
+ if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
+ netdev_dbg(bond_dev, "%s is NETIF_F_VLAN_CHALLENGED\n",
+ slave_dev->name);
+ if (vlan_uses_dev(bond_dev)) {
+ NL_SET_ERR_MSG(extack, "Can not enslave VLAN challenged device to VLAN enabled bond");
+ netdev_err(bond_dev, "Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
+ slave_dev->name, bond_dev->name);
+ return -EPERM;
+ } else {
+ netdev_warn(bond_dev, "enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
+ slave_dev->name, slave_dev->name,
+ bond_dev->name);
+ }
+ } else {
+ netdev_dbg(bond_dev, "%s is !NETIF_F_VLAN_CHALLENGED\n",
+ slave_dev->name);
+ }
+
+ /* Old ifenslave binaries are no longer supported. These can
+ * be identified with moderate accuracy by the state of the slave:
+ * the current ifenslave will set the interface down prior to
+ * enslaving it; the old ifenslave will not.
+ */
+ if (slave_dev->flags & IFF_UP) {
+ NL_SET_ERR_MSG(extack, "Device can not be enslaved while up");
+ netdev_err(bond_dev, "%s is up - this may be due to an out of date ifenslave\n",
+ slave_dev->name);
+ return -EPERM;
+ }
+
+ /* set bonding device ether type by slave - bonding netdevices are
+ * created with ether_setup, so when the slave type is not ARPHRD_ETHER
+ * there is a need to override some of the type dependent attribs/funcs.
+ *
+ * bond ether type mutual exclusion - don't allow slaves of dissimilar
+ * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
+ */
+ if (!bond_has_slaves(bond)) {
+ if (bond_dev->type != slave_dev->type) {
+ netdev_dbg(bond_dev, "change device type from %d to %d\n",
+ bond_dev->type, slave_dev->type);
+
+ res = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE,
+ bond_dev);
+ res = notifier_to_errno(res);
+ if (res) {
+ netdev_err(bond_dev, "refused to change device type\n");
+ return -EBUSY;
+ }
+
+ /* Flush unicast and multicast addresses */
+ dev_uc_flush(bond_dev);
+ dev_mc_flush(bond_dev);
+
+ if (slave_dev->type != ARPHRD_ETHER)
+ bond_setup_by_slave(bond_dev, slave_dev);
+ else {
+ ether_setup(bond_dev);
+ bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING;
+ }
+
+ call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE,
+ bond_dev);
+ }
+ } else if (bond_dev->type != slave_dev->type) {
+ NL_SET_ERR_MSG(extack, "Device type is different from other slaves");
+ netdev_err(bond_dev, "%s ether type (%d) is different from other slaves (%d), can not enslave it\n",
+ slave_dev->name, slave_dev->type, bond_dev->type);
+ return -EINVAL;
+ }
+
+ if (slave_dev->type == ARPHRD_INFINIBAND &&
+ BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
+ NL_SET_ERR_MSG(extack, "Only active-backup mode is supported for infiniband slaves");
+ netdev_warn(bond_dev, "Type (%d) supports only active-backup mode\n",
+ slave_dev->type);
+ res = -EOPNOTSUPP;
+ goto err_undo_flags;
+ }
+
+ if (!slave_ops->ndo_set_mac_address ||
+ slave_dev->type == ARPHRD_INFINIBAND) {
+ netdev_warn(bond_dev, "The slave device specified does not support setting the MAC address\n");
+ if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
+ bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
+ if (!bond_has_slaves(bond)) {
+ bond->params.fail_over_mac = BOND_FOM_ACTIVE;
+ netdev_warn(bond_dev, "Setting fail_over_mac to active for active-backup mode\n");
+ } else {
+ NL_SET_ERR_MSG(extack, "Slave device does not support setting the MAC address, but fail_over_mac is not set to active");
+ netdev_err(bond_dev, "The slave device specified does not support setting the MAC address, but fail_over_mac is not set to active\n");
+ res = -EOPNOTSUPP;
+ goto err_undo_flags;
+ }
+ }
+ }
+
+ call_netdevice_notifiers(NETDEV_JOIN, slave_dev);
+
+ /* If this is the first slave, then we need to set the master's hardware
+ * address to be the same as the slave's.
+ */
+ if (!bond_has_slaves(bond) &&
+ bond->dev->addr_assign_type == NET_ADDR_RANDOM)
+ bond_set_dev_addr(bond->dev, slave_dev);
+
+ new_slave = bond_alloc_slave(bond);
+ if (!new_slave) {
+ res = -ENOMEM;
+ goto err_undo_flags;
+ }
+
+ new_slave->bond = bond;
+ new_slave->dev = slave_dev;
+ /* Set the new_slave's queue_id to be zero. Queue ID mapping
+ * is set via sysfs or module option if desired.
+ */
+ new_slave->queue_id = 0;
+
+ /* Save slave's original mtu and then set it to match the bond */
+ new_slave->original_mtu = slave_dev->mtu;
+ res = dev_set_mtu(slave_dev, bond->dev->mtu);
+ if (res) {
+ netdev_dbg(bond_dev, "Error %d calling dev_set_mtu\n", res);
+ goto err_free;
+ }
+
+ /* Save slave's original ("permanent") mac address for modes
+ * that need it, and for restoring it upon release, and then
+ * set it to the master's address
+ */
+ bond_hw_addr_copy(new_slave->perm_hwaddr, slave_dev->dev_addr,
+ slave_dev->addr_len);
+
+ if (!bond->params.fail_over_mac ||
+ BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
+ /* Set slave to master's mac address. The application already
+ * set the master's mac address to that of the first slave
+ */
+ memcpy(ss.__data, bond_dev->dev_addr, bond_dev->addr_len);
+ ss.ss_family = slave_dev->type;
+ res = dev_set_mac_address(slave_dev, (struct sockaddr *)&ss);
+ if (res) {
+ netdev_dbg(bond_dev, "Error %d calling set_mac_address\n", res);
+ goto err_restore_mtu;
+ }
+ }
+
+ /* set slave flag before open to prevent IPv6 addrconf */
+ slave_dev->flags |= IFF_SLAVE;
+
+ /* open the slave since the application closed it */
+ res = dev_open(slave_dev);
+ if (res) {
+ netdev_dbg(bond_dev, "Opening slave %s failed\n", slave_dev->name);
+ goto err_restore_mac;
+ }
+
+ slave_dev->priv_flags |= IFF_BONDING;
+ /* initialize slave stats */
+ dev_get_stats(new_slave->dev, &new_slave->slave_stats);
+
+ if (bond_is_lb(bond)) {
+ /* bond_alb_init_slave() must be called before all other stages since
+ * it might fail and we do not want to have to undo everything
+ */
+ res = bond_alb_init_slave(bond, new_slave);
+ if (res)
+ goto err_close;
+ }
+
+ res = vlan_vids_add_by_dev(slave_dev, bond_dev);
+ if (res) {
+ netdev_err(bond_dev, "Couldn't add bond vlan ids to %s\n",
+ slave_dev->name);
+ goto err_close;
+ }
+
+ prev_slave = bond_last_slave(bond);
+
+ new_slave->delay = 0;
+ new_slave->link_failure_count = 0;
+
+ if (bond_update_speed_duplex(new_slave) &&
+ bond_needs_speed_duplex(bond))
+ new_slave->link = BOND_LINK_DOWN;
+
+ new_slave->last_rx = jiffies -
+ (msecs_to_jiffies(bond->params.arp_interval) + 1);
+ for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
+ new_slave->target_last_arp_rx[i] = new_slave->last_rx;
+
+ if (bond->params.miimon && !bond->params.use_carrier) {
+ link_reporting = bond_check_dev_link(bond, slave_dev, 1);
+
+ if ((link_reporting == -1) && !bond->params.arp_interval) {
+ /* miimon is set but a bonded network driver
+ * does not support ETHTOOL/MII and
+ * arp_interval is not set. Note: if
+ * use_carrier is enabled, we will never go
+ * here (because netif_carrier is always
+ * supported); thus, we don't need to change
+ * the messages for netif_carrier.
+ */
+ netdev_warn(bond_dev, "MII and ETHTOOL support not available for interface %s, and arp_interval/arp_ip_target module parameters not specified, thus bonding will not detect link failures! see bonding.txt for details\n",
+ slave_dev->name);
+ } else if (link_reporting == -1) {
+ /* unable get link status using mii/ethtool */
+ netdev_warn(bond_dev, "can't get link status from interface %s; the network driver associated with this interface does not support MII or ETHTOOL link status reporting, thus miimon has no effect on this interface\n",
+ slave_dev->name);
+ }
+ }
+
+ /* check for initial state */
+ new_slave->link = BOND_LINK_NOCHANGE;
+ if (bond->params.miimon) {
+ if (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS) {
+ if (bond->params.updelay) {
+ bond_set_slave_link_state(new_slave,
+ BOND_LINK_BACK,
+ BOND_SLAVE_NOTIFY_NOW);
+ new_slave->delay = bond->params.updelay;
+ } else {
+ bond_set_slave_link_state(new_slave,
+ BOND_LINK_UP,
+ BOND_SLAVE_NOTIFY_NOW);
+ }
+ } else {
+ bond_set_slave_link_state(new_slave, BOND_LINK_DOWN,
+ BOND_SLAVE_NOTIFY_NOW);
+ }
+ } else if (bond->params.arp_interval) {
+ bond_set_slave_link_state(new_slave,
+ (netif_carrier_ok(slave_dev) ?
+ BOND_LINK_UP : BOND_LINK_DOWN),
+ BOND_SLAVE_NOTIFY_NOW);
+ } else {
+ bond_set_slave_link_state(new_slave, BOND_LINK_UP,
+ BOND_SLAVE_NOTIFY_NOW);
+ }
+
+ if (new_slave->link != BOND_LINK_DOWN)
+ new_slave->last_link_up = jiffies;
+ netdev_dbg(bond_dev, "Initial state of slave_dev is BOND_LINK_%s\n",
+ new_slave->link == BOND_LINK_DOWN ? "DOWN" :
+ (new_slave->link == BOND_LINK_UP ? "UP" : "BACK"));
+
+ if (bond_uses_primary(bond) && bond->params.primary[0]) {
+ /* if there is a primary slave, remember it */
+ if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
+ rcu_assign_pointer(bond->primary_slave, new_slave);
+ bond->force_primary = true;
+ }
+ }
+
+ switch (BOND_MODE(bond)) {
+ case BOND_MODE_ACTIVEBACKUP:
+ bond_set_slave_inactive_flags(new_slave,
+ BOND_SLAVE_NOTIFY_NOW);
+ break;
+ case BOND_MODE_8023AD:
+ /* in 802.3ad mode, the internal mechanism
+ * will activate the slaves in the selected
+ * aggregator
+ */
+ bond_set_slave_inactive_flags(new_slave, BOND_SLAVE_NOTIFY_NOW);
+ /* if this is the first slave */
+ if (!prev_slave) {
+ SLAVE_AD_INFO(new_slave)->id = 1;
+ /* Initialize AD with the number of times that the AD timer is called in 1 second
+ * can be called only after the mac address of the bond is set
+ */
+ bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL);
+ } else {
+ SLAVE_AD_INFO(new_slave)->id =
+ SLAVE_AD_INFO(prev_slave)->id + 1;
+ }
+
+ bond_3ad_bind_slave(new_slave);
+ break;
+ case BOND_MODE_TLB:
+ case BOND_MODE_ALB:
+ bond_set_active_slave(new_slave);
+ bond_set_slave_inactive_flags(new_slave, BOND_SLAVE_NOTIFY_NOW);
+ break;
+ default:
+ netdev_dbg(bond_dev, "This slave is always active in trunk mode\n");
+
+ /* always active in trunk mode */
+ bond_set_active_slave(new_slave);
+
+ /* In trunking mode there is little meaning to curr_active_slave
+ * anyway (it holds no special properties of the bond device),
+ * so we can change it without calling change_active_interface()
+ */
+ if (!rcu_access_pointer(bond->curr_active_slave) &&
+ new_slave->link == BOND_LINK_UP)
+ rcu_assign_pointer(bond->curr_active_slave, new_slave);
+
+ break;
+ } /* switch(bond_mode) */
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ if (bond->dev->npinfo) {
+ if (slave_enable_netpoll(new_slave)) {
+ netdev_info(bond_dev, "master_dev is using netpoll, but new slave device does not support netpoll\n");
+ res = -EBUSY;
+ goto err_detach;
+ }
+ }
+#endif
+
+ if (!(bond_dev->features & NETIF_F_LRO))
+ dev_disable_lro(slave_dev);
+
+ res = netdev_rx_handler_register(slave_dev, bond_handle_frame,
+ new_slave);
+ if (res) {
+ netdev_dbg(bond_dev, "Error %d calling netdev_rx_handler_register\n", res);
+ goto err_detach;
+ }
+
+ res = bond_master_upper_dev_link(bond, new_slave, extack);
+ if (res) {
+ netdev_dbg(bond_dev, "Error %d calling bond_master_upper_dev_link\n", res);
+ goto err_unregister;
+ }
+
+ res = bond_sysfs_slave_add(new_slave);
+ if (res) {
+ netdev_dbg(bond_dev, "Error %d calling bond_sysfs_slave_add\n", res);
+ goto err_upper_unlink;
+ }
+
+ bond->nest_level = dev_get_nest_level(bond_dev) + 1;
+
+ /* If the mode uses primary, then the following is handled by
+ * bond_change_active_slave().
+ */
+ if (!bond_uses_primary(bond)) {
+ /* set promiscuity level to new slave */
+ if (bond_dev->flags & IFF_PROMISC) {
+ res = dev_set_promiscuity(slave_dev, 1);
+ if (res)
+ goto err_sysfs_del;
+ }
+
+ /* set allmulti level to new slave */
+ if (bond_dev->flags & IFF_ALLMULTI) {
+ res = dev_set_allmulti(slave_dev, 1);
+ if (res) {
+ if (bond_dev->flags & IFF_PROMISC)
+ dev_set_promiscuity(slave_dev, -1);
+ goto err_sysfs_del;
+ }
+ }
+
+ netif_addr_lock_bh(bond_dev);
+ dev_mc_sync_multiple(slave_dev, bond_dev);
+ dev_uc_sync_multiple(slave_dev, bond_dev);
+ netif_addr_unlock_bh(bond_dev);
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+ /* add lacpdu mc addr to mc list */
+ u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
+
+ dev_mc_add(slave_dev, lacpdu_multicast);
+ }
+ }
+
+ bond->slave_cnt++;
+ bond_compute_features(bond);
+ bond_set_carrier(bond);
+
+ if (bond_uses_primary(bond)) {
+ block_netpoll_tx();
+ bond_select_active_slave(bond);
+ unblock_netpoll_tx();
+ }
+
+ if (bond_mode_can_use_xmit_hash(bond))
+ bond_update_slave_arr(bond, NULL);
+
+
+ netdev_info(bond_dev, "Enslaving %s as %s interface with %s link\n",
+ slave_dev->name,
+ bond_is_active_slave(new_slave) ? "an active" : "a backup",
+ new_slave->link != BOND_LINK_DOWN ? "an up" : "a down");
+
+ /* enslave is successful */
+ bond_queue_slave_event(new_slave);
+ return 0;
+
+/* Undo stages on error */
+err_sysfs_del:
+ bond_sysfs_slave_del(new_slave);
+
+err_upper_unlink:
+ bond_upper_dev_unlink(bond, new_slave);
+
+err_unregister:
+ netdev_rx_handler_unregister(slave_dev);
+
+err_detach:
+ vlan_vids_del_by_dev(slave_dev, bond_dev);
+ if (rcu_access_pointer(bond->primary_slave) == new_slave)
+ RCU_INIT_POINTER(bond->primary_slave, NULL);
+ if (rcu_access_pointer(bond->curr_active_slave) == new_slave) {
+ block_netpoll_tx();
+ bond_change_active_slave(bond, NULL);
+ bond_select_active_slave(bond);
+ unblock_netpoll_tx();
+ }
+ /* either primary_slave or curr_active_slave might've changed */
+ synchronize_rcu();
+ slave_disable_netpoll(new_slave);
+
+err_close:
+ slave_dev->priv_flags &= ~IFF_BONDING;
+ dev_close(slave_dev);
+
+err_restore_mac:
+ slave_dev->flags &= ~IFF_SLAVE;
+ if (!bond->params.fail_over_mac ||
+ BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
+ /* XXX TODO - fom follow mode needs to change master's
+ * MAC if this slave's MAC is in use by the bond, or at
+ * least print a warning.
+ */
+ bond_hw_addr_copy(ss.__data, new_slave->perm_hwaddr,
+ new_slave->dev->addr_len);
+ ss.ss_family = slave_dev->type;
+ dev_set_mac_address(slave_dev, (struct sockaddr *)&ss);
+ }
+
+err_restore_mtu:
+ dev_set_mtu(slave_dev, new_slave->original_mtu);
+
+err_free:
+ bond_free_slave(new_slave);
+
+err_undo_flags:
+ /* Enslave of first slave has failed and we need to fix master's mac */
+ if (!bond_has_slaves(bond)) {
+ if (ether_addr_equal_64bits(bond_dev->dev_addr,
+ slave_dev->dev_addr))
+ eth_hw_addr_random(bond_dev);
+ if (bond_dev->type != ARPHRD_ETHER) {
+ dev_close(bond_dev);
+ ether_setup(bond_dev);
+ bond_dev->flags |= IFF_MASTER;
+ bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING;
+ }
+ }
+
+ return res;
+}
+
+/* Try to release the slave device <slave> from the bond device <master>
+ * It is legal to access curr_active_slave without a lock because all the function
+ * is RTNL-locked. If "all" is true it means that the function is being called
+ * while destroying a bond interface and all slaves are being released.
+ *
+ * The rules for slave state should be:
+ * for Active/Backup:
+ * Active stays on all backups go down
+ * for Bonded connections:
+ * The first up interface should be left on and all others downed.
+ */
+static int __bond_release_one(struct net_device *bond_dev,
+ struct net_device *slave_dev,
+ bool all, bool unregister)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave, *oldcurrent;
+ struct sockaddr_storage ss;
+ int old_flags = bond_dev->flags;
+ netdev_features_t old_features = bond_dev->features;
+
+ /* slave is not a slave or master is not master of this slave */
+ if (!(slave_dev->flags & IFF_SLAVE) ||
+ !netdev_has_upper_dev(slave_dev, bond_dev)) {
+ netdev_dbg(bond_dev, "cannot release %s\n",
+ slave_dev->name);
+ return -EINVAL;
+ }
+
+ block_netpoll_tx();
+
+ slave = bond_get_slave_by_dev(bond, slave_dev);
+ if (!slave) {
+ /* not a slave of this bond */
+ netdev_info(bond_dev, "%s not enslaved\n",
+ slave_dev->name);
+ unblock_netpoll_tx();
+ return -EINVAL;
+ }
+
+ bond_set_slave_inactive_flags(slave, BOND_SLAVE_NOTIFY_NOW);
+
+ bond_sysfs_slave_del(slave);
+
+ /* recompute stats just before removing the slave */
+ bond_get_stats(bond->dev, &bond->bond_stats);
+
+ bond_upper_dev_unlink(bond, slave);
+ /* unregister rx_handler early so bond_handle_frame wouldn't be called
+ * for this slave anymore.
+ */
+ netdev_rx_handler_unregister(slave_dev);
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD)
+ bond_3ad_unbind_slave(slave);
+
+ if (bond_mode_can_use_xmit_hash(bond))
+ bond_update_slave_arr(bond, slave);
+
+ netdev_info(bond_dev, "Releasing %s interface %s\n",
+ bond_is_active_slave(slave) ? "active" : "backup",
+ slave_dev->name);
+
+ oldcurrent = rcu_access_pointer(bond->curr_active_slave);
+
+ RCU_INIT_POINTER(bond->current_arp_slave, NULL);
+
+ if (!all && (!bond->params.fail_over_mac ||
+ BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP)) {
+ if (ether_addr_equal_64bits(bond_dev->dev_addr, slave->perm_hwaddr) &&
+ bond_has_slaves(bond))
+ netdev_warn(bond_dev, "the permanent HWaddr of %s - %pM - is still in use by %s - set the HWaddr of %s to a different address to avoid conflicts\n",
+ slave_dev->name, slave->perm_hwaddr,
+ bond_dev->name, slave_dev->name);
+ }
+
+ if (rtnl_dereference(bond->primary_slave) == slave)
+ RCU_INIT_POINTER(bond->primary_slave, NULL);
+
+ if (oldcurrent == slave)
+ bond_change_active_slave(bond, NULL);
+
+ if (bond_is_lb(bond)) {
+ /* Must be called only after the slave has been
+ * detached from the list and the curr_active_slave
+ * has been cleared (if our_slave == old_current),
+ * but before a new active slave is selected.
+ */
+ bond_alb_deinit_slave(bond, slave);
+ }
+
+ if (all) {
+ RCU_INIT_POINTER(bond->curr_active_slave, NULL);
+ } else if (oldcurrent == slave) {
+ /* Note that we hold RTNL over this sequence, so there
+ * is no concern that another slave add/remove event
+ * will interfere.
+ */
+ bond_select_active_slave(bond);
+ }
+
+ if (!bond_has_slaves(bond)) {
+ bond_set_carrier(bond);
+ eth_hw_addr_random(bond_dev);
+ }
+
+ unblock_netpoll_tx();
+ synchronize_rcu();
+ bond->slave_cnt--;
+
+ if (!bond_has_slaves(bond)) {
+ call_netdevice_notifiers(NETDEV_CHANGEADDR, bond->dev);
+ call_netdevice_notifiers(NETDEV_RELEASE, bond->dev);
+ }
+
+ bond_compute_features(bond);
+ if (!(bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
+ (old_features & NETIF_F_VLAN_CHALLENGED))
+ netdev_info(bond_dev, "last VLAN challenged slave %s left bond %s - VLAN blocking is removed\n",
+ slave_dev->name, bond_dev->name);
+
+ vlan_vids_del_by_dev(slave_dev, bond_dev);
+
+ /* If the mode uses primary, then this case was handled above by
+ * bond_change_active_slave(..., NULL)
+ */
+ if (!bond_uses_primary(bond)) {
+ /* unset promiscuity level from slave
+ * NOTE: The NETDEV_CHANGEADDR call above may change the value
+ * of the IFF_PROMISC flag in the bond_dev, but we need the
+ * value of that flag before that change, as that was the value
+ * when this slave was attached, so we cache at the start of the
+ * function and use it here. Same goes for ALLMULTI below
+ */
+ if (old_flags & IFF_PROMISC)
+ dev_set_promiscuity(slave_dev, -1);
+
+ /* unset allmulti level from slave */
+ if (old_flags & IFF_ALLMULTI)
+ dev_set_allmulti(slave_dev, -1);
+
+ bond_hw_addr_flush(bond_dev, slave_dev);
+ }
+
+ slave_disable_netpoll(slave);
+
+ /* close slave before restoring its mac address */
+ dev_close(slave_dev);
+
+ if (bond->params.fail_over_mac != BOND_FOM_ACTIVE ||
+ BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
+ /* restore original ("permanent") mac address */
+ bond_hw_addr_copy(ss.__data, slave->perm_hwaddr,
+ slave->dev->addr_len);
+ ss.ss_family = slave_dev->type;
+ dev_set_mac_address(slave_dev, (struct sockaddr *)&ss);
+ }
+
+ if (unregister)
+ __dev_set_mtu(slave_dev, slave->original_mtu);
+ else
+ dev_set_mtu(slave_dev, slave->original_mtu);
+
+ slave_dev->priv_flags &= ~IFF_BONDING;
+
+ bond_free_slave(slave);
+
+ return 0;
+}
+
+/* A wrapper used because of ndo_del_link */
+int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
+{
+ return __bond_release_one(bond_dev, slave_dev, false, false);
+}
+
+/* First release a slave and then destroy the bond if no more slaves are left.
+ * Must be under rtnl_lock when this function is called.
+ */
+static int bond_release_and_destroy(struct net_device *bond_dev,
+ struct net_device *slave_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ int ret;
+
+ ret = __bond_release_one(bond_dev, slave_dev, false, true);
+ if (ret == 0 && !bond_has_slaves(bond)) {
+ bond_dev->priv_flags |= IFF_DISABLE_NETPOLL;
+ netdev_info(bond_dev, "Destroying bond %s\n",
+ bond_dev->name);
+ bond_remove_proc_entry(bond);
+ unregister_netdevice(bond_dev);
+ }
+ return ret;
+}
+
+static void bond_info_query(struct net_device *bond_dev, struct ifbond *info)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ bond_fill_ifbond(bond, info);
+}
+
+static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct list_head *iter;
+ int i = 0, res = -ENODEV;
+ struct slave *slave;
+
+ bond_for_each_slave(bond, slave, iter) {
+ if (i++ == (int)info->slave_id) {
+ res = 0;
+ bond_fill_ifslave(slave, info);
+ break;
+ }
+ }
+
+ return res;
+}
+
+/*-------------------------------- Monitoring -------------------------------*/
+
+/* called with rcu_read_lock() */
+static int bond_miimon_inspect(struct bonding *bond)
+{
+ int link_state, commit = 0;
+ struct list_head *iter;
+ struct slave *slave;
+ bool ignore_updelay;
+
+ ignore_updelay = !rcu_dereference(bond->curr_active_slave);
+
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ slave->new_link = BOND_LINK_NOCHANGE;
+ slave->link_new_state = slave->link;
+
+ link_state = bond_check_dev_link(bond, slave->dev, 0);
+
+ switch (slave->link) {
+ case BOND_LINK_UP:
+ if (link_state)
+ continue;
+
+ bond_propose_link_state(slave, BOND_LINK_FAIL);
+ commit++;
+ slave->delay = bond->params.downdelay;
+ if (slave->delay) {
+ netdev_info(bond->dev, "link status down for %sinterface %s, disabling it in %d ms\n",
+ (BOND_MODE(bond) ==
+ BOND_MODE_ACTIVEBACKUP) ?
+ (bond_is_active_slave(slave) ?
+ "active " : "backup ") : "",
+ slave->dev->name,
+ bond->params.downdelay * bond->params.miimon);
+ }
+ /*FALLTHRU*/
+ case BOND_LINK_FAIL:
+ if (link_state) {
+ /* recovered before downdelay expired */
+ bond_propose_link_state(slave, BOND_LINK_UP);
+ slave->last_link_up = jiffies;
+ netdev_info(bond->dev, "link status up again after %d ms for interface %s\n",
+ (bond->params.downdelay - slave->delay) *
+ bond->params.miimon,
+ slave->dev->name);
+ commit++;
+ continue;
+ }
+
+ if (slave->delay <= 0) {
+ slave->new_link = BOND_LINK_DOWN;
+ commit++;
+ continue;
+ }
+
+ slave->delay--;
+ break;
+
+ case BOND_LINK_DOWN:
+ if (!link_state)
+ continue;
+
+ bond_propose_link_state(slave, BOND_LINK_BACK);
+ commit++;
+ slave->delay = bond->params.updelay;
+
+ if (slave->delay) {
+ netdev_info(bond->dev, "link status up for interface %s, enabling it in %d ms\n",
+ slave->dev->name,
+ ignore_updelay ? 0 :
+ bond->params.updelay *
+ bond->params.miimon);
+ }
+ /*FALLTHRU*/
+ case BOND_LINK_BACK:
+ if (!link_state) {
+ bond_propose_link_state(slave, BOND_LINK_DOWN);
+ netdev_info(bond->dev, "link status down again after %d ms for interface %s\n",
+ (bond->params.updelay - slave->delay) *
+ bond->params.miimon,
+ slave->dev->name);
+ commit++;
+ continue;
+ }
+
+ if (ignore_updelay)
+ slave->delay = 0;
+
+ if (slave->delay <= 0) {
+ slave->new_link = BOND_LINK_UP;
+ commit++;
+ ignore_updelay = false;
+ continue;
+ }
+
+ slave->delay--;
+ break;
+ }
+ }
+
+ return commit;
+}
+
+static void bond_miimon_link_change(struct bonding *bond,
+ struct slave *slave,
+ char link)
+{
+ switch (BOND_MODE(bond)) {
+ case BOND_MODE_8023AD:
+ bond_3ad_handle_link_change(slave, link);
+ break;
+ case BOND_MODE_TLB:
+ case BOND_MODE_ALB:
+ bond_alb_handle_link_change(bond, slave, link);
+ break;
+ case BOND_MODE_XOR:
+ bond_update_slave_arr(bond, NULL);
+ break;
+ }
+}
+
+static void bond_miimon_commit(struct bonding *bond)
+{
+ struct list_head *iter;
+ struct slave *slave, *primary;
+
+ bond_for_each_slave(bond, slave, iter) {
+ switch (slave->new_link) {
+ case BOND_LINK_NOCHANGE:
+ continue;
+
+ case BOND_LINK_UP:
+ if (bond_update_speed_duplex(slave) &&
+ bond_needs_speed_duplex(bond)) {
+ slave->link = BOND_LINK_DOWN;
+ if (net_ratelimit())
+ netdev_warn(bond->dev,
+ "failed to get link speed/duplex for %s\n",
+ slave->dev->name);
+ continue;
+ }
+ bond_set_slave_link_state(slave, BOND_LINK_UP,
+ BOND_SLAVE_NOTIFY_NOW);
+ slave->last_link_up = jiffies;
+
+ primary = rtnl_dereference(bond->primary_slave);
+ if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+ /* prevent it from being the active one */
+ bond_set_backup_slave(slave);
+ } else if (BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
+ /* make it immediately active */
+ bond_set_active_slave(slave);
+ } else if (slave != primary) {
+ /* prevent it from being the active one */
+ bond_set_backup_slave(slave);
+ }
+
+ netdev_info(bond->dev, "link status definitely up for interface %s, %u Mbps %s duplex\n",
+ slave->dev->name,
+ slave->speed == SPEED_UNKNOWN ? 0 : slave->speed,
+ slave->duplex ? "full" : "half");
+
+ bond_miimon_link_change(bond, slave, BOND_LINK_UP);
+
+ if (!bond->curr_active_slave || slave == primary)
+ goto do_failover;
+
+ continue;
+
+ case BOND_LINK_DOWN:
+ if (slave->link_failure_count < UINT_MAX)
+ slave->link_failure_count++;
+
+ bond_set_slave_link_state(slave, BOND_LINK_DOWN,
+ BOND_SLAVE_NOTIFY_NOW);
+
+ if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
+ BOND_MODE(bond) == BOND_MODE_8023AD)
+ bond_set_slave_inactive_flags(slave,
+ BOND_SLAVE_NOTIFY_NOW);
+
+ netdev_info(bond->dev, "link status definitely down for interface %s, disabling it\n",
+ slave->dev->name);
+
+ bond_miimon_link_change(bond, slave, BOND_LINK_DOWN);
+
+ if (slave == rcu_access_pointer(bond->curr_active_slave))
+ goto do_failover;
+
+ continue;
+
+ default:
+ netdev_err(bond->dev, "invalid new link %d on slave %s\n",
+ slave->new_link, slave->dev->name);
+ slave->new_link = BOND_LINK_NOCHANGE;
+
+ continue;
+ }
+
+do_failover:
+ block_netpoll_tx();
+ bond_select_active_slave(bond);
+ unblock_netpoll_tx();
+ }
+
+ bond_set_carrier(bond);
+}
+
+/* bond_mii_monitor
+ *
+ * Really a wrapper that splits the mii monitor into two phases: an
+ * inspection, then (if inspection indicates something needs to be done)
+ * an acquisition of appropriate locks followed by a commit phase to
+ * implement whatever link state changes are indicated.
+ */
+static void bond_mii_monitor(struct work_struct *work)
+{
+ struct bonding *bond = container_of(work, struct bonding,
+ mii_work.work);
+ bool should_notify_peers = false;
+ unsigned long delay;
+ struct slave *slave;
+ struct list_head *iter;
+
+ delay = msecs_to_jiffies(bond->params.miimon);
+
+ if (!bond_has_slaves(bond))
+ goto re_arm;
+
+ rcu_read_lock();
+
+ should_notify_peers = bond_should_notify_peers(bond);
+
+ if (bond_miimon_inspect(bond)) {
+ rcu_read_unlock();
+
+ /* Race avoidance with bond_close cancel of workqueue */
+ if (!rtnl_trylock()) {
+ delay = 1;
+ should_notify_peers = false;
+ goto re_arm;
+ }
+
+ bond_for_each_slave(bond, slave, iter) {
+ bond_commit_link_state(slave, BOND_SLAVE_NOTIFY_LATER);
+ }
+ bond_miimon_commit(bond);
+
+ rtnl_unlock(); /* might sleep, hold no other locks */
+ } else
+ rcu_read_unlock();
+
+re_arm:
+ if (bond->params.miimon)
+ queue_delayed_work(bond->wq, &bond->mii_work, delay);
+
+ if (should_notify_peers) {
+ if (!rtnl_trylock())
+ return;
+ call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, bond->dev);
+ rtnl_unlock();
+ }
+}
+
+static int bond_upper_dev_walk(struct net_device *upper, void *data)
+{
+ __be32 ip = *((__be32 *)data);
+
+ return ip == bond_confirm_addr(upper, 0, ip);
+}
+
+static bool bond_has_this_ip(struct bonding *bond, __be32 ip)
+{
+ bool ret = false;
+
+ if (ip == bond_confirm_addr(bond->dev, 0, ip))
+ return true;
+
+ rcu_read_lock();
+ if (netdev_walk_all_upper_dev_rcu(bond->dev, bond_upper_dev_walk, &ip))
+ ret = true;
+ rcu_read_unlock();
+
+ return ret;
+}
+
+/* We go to the (large) trouble of VLAN tagging ARP frames because
+ * switches in VLAN mode (especially if ports are configured as
+ * "native" to a VLAN) might not pass non-tagged frames.
+ */
+static void bond_arp_send(struct net_device *slave_dev, int arp_op,
+ __be32 dest_ip, __be32 src_ip,
+ struct bond_vlan_tag *tags)
+{
+ struct sk_buff *skb;
+ struct bond_vlan_tag *outer_tag = tags;
+
+ netdev_dbg(slave_dev, "arp %d on slave %s: dst %pI4 src %pI4\n",
+ arp_op, slave_dev->name, &dest_ip, &src_ip);
+
+ skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
+ NULL, slave_dev->dev_addr, NULL);
+
+ if (!skb) {
+ net_err_ratelimited("ARP packet allocation failed\n");
+ return;
+ }
+
+ if (!tags || tags->vlan_proto == VLAN_N_VID)
+ goto xmit;
+
+ tags++;
+
+ /* Go through all the tags backwards and add them to the packet */
+ while (tags->vlan_proto != VLAN_N_VID) {
+ if (!tags->vlan_id) {
+ tags++;
+ continue;
+ }
+
+ netdev_dbg(slave_dev, "inner tag: proto %X vid %X\n",
+ ntohs(outer_tag->vlan_proto), tags->vlan_id);
+ skb = vlan_insert_tag_set_proto(skb, tags->vlan_proto,
+ tags->vlan_id);
+ if (!skb) {
+ net_err_ratelimited("failed to insert inner VLAN tag\n");
+ return;
+ }
+
+ tags++;
+ }
+ /* Set the outer tag */
+ if (outer_tag->vlan_id) {
+ netdev_dbg(slave_dev, "outer tag: proto %X vid %X\n",
+ ntohs(outer_tag->vlan_proto), outer_tag->vlan_id);
+ __vlan_hwaccel_put_tag(skb, outer_tag->vlan_proto,
+ outer_tag->vlan_id);
+ }
+
+xmit:
+ arp_xmit(skb);
+}
+
+/* Validate the device path between the @start_dev and the @end_dev.
+ * The path is valid if the @end_dev is reachable through device
+ * stacking.
+ * When the path is validated, collect any vlan information in the
+ * path.
+ */
+struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
+ struct net_device *end_dev,
+ int level)
+{
+ struct bond_vlan_tag *tags;
+ struct net_device *upper;
+ struct list_head *iter;
+
+ if (start_dev == end_dev) {
+ tags = kcalloc(level + 1, sizeof(*tags), GFP_ATOMIC);
+ if (!tags)
+ return ERR_PTR(-ENOMEM);
+ tags[level].vlan_proto = VLAN_N_VID;
+ return tags;
+ }
+
+ netdev_for_each_upper_dev_rcu(start_dev, upper, iter) {
+ tags = bond_verify_device_path(upper, end_dev, level + 1);
+ if (IS_ERR_OR_NULL(tags)) {
+ if (IS_ERR(tags))
+ return tags;
+ continue;
+ }
+ if (is_vlan_dev(upper)) {
+ tags[level].vlan_proto = vlan_dev_vlan_proto(upper);
+ tags[level].vlan_id = vlan_dev_vlan_id(upper);
+ }
+
+ return tags;
+ }
+
+ return NULL;
+}
+
+static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
+{
+ struct rtable *rt;
+ struct bond_vlan_tag *tags;
+ __be32 *targets = bond->params.arp_targets, addr;
+ int i;
+
+ for (i = 0; i < BOND_MAX_ARP_TARGETS && targets[i]; i++) {
+ netdev_dbg(bond->dev, "basa: target %pI4\n", &targets[i]);
+ tags = NULL;
+
+ /* Find out through which dev should the packet go */
+ rt = ip_route_output(dev_net(bond->dev), targets[i], 0,
+ RTO_ONLINK, 0);
+ if (IS_ERR(rt)) {
+ /* there's no route to target - try to send arp
+ * probe to generate any traffic (arp_validate=0)
+ */
+ if (bond->params.arp_validate)
+ net_warn_ratelimited("%s: no route to arp_ip_target %pI4 and arp_validate is set\n",
+ bond->dev->name,
+ &targets[i]);
+ bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
+ 0, tags);
+ continue;
+ }
+
+ /* bond device itself */
+ if (rt->dst.dev == bond->dev)
+ goto found;
+
+ rcu_read_lock();
+ tags = bond_verify_device_path(bond->dev, rt->dst.dev, 0);
+ rcu_read_unlock();
+
+ if (!IS_ERR_OR_NULL(tags))
+ goto found;
+
+ /* Not our device - skip */
+ netdev_dbg(bond->dev, "no path to arp_ip_target %pI4 via rt.dev %s\n",
+ &targets[i], rt->dst.dev ? rt->dst.dev->name : "NULL");
+
+ ip_rt_put(rt);
+ continue;
+
+found:
+ addr = bond_confirm_addr(rt->dst.dev, targets[i], 0);
+ ip_rt_put(rt);
+ bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
+ addr, tags);
+ kfree(tags);
+ }
+}
+
+static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
+{
+ int i;
+
+ if (!sip || !bond_has_this_ip(bond, tip)) {
+ netdev_dbg(bond->dev, "bva: sip %pI4 tip %pI4 not found\n",
+ &sip, &tip);
+ return;
+ }
+
+ i = bond_get_targets_ip(bond->params.arp_targets, sip);
+ if (i == -1) {
+ netdev_dbg(bond->dev, "bva: sip %pI4 not found in targets\n",
+ &sip);
+ return;
+ }
+ slave->last_rx = jiffies;
+ slave->target_last_arp_rx[i] = jiffies;
+}
+
+int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond,
+ struct slave *slave)
+{
+ struct arphdr *arp = (struct arphdr *)skb->data;
+ struct slave *curr_active_slave, *curr_arp_slave;
+ unsigned char *arp_ptr;
+ __be32 sip, tip;
+ int is_arp = skb->protocol == __cpu_to_be16(ETH_P_ARP);
+ unsigned int alen;
+
+ if (!slave_do_arp_validate(bond, slave)) {
+ if ((slave_do_arp_validate_only(bond) && is_arp) ||
+ !slave_do_arp_validate_only(bond))
+ slave->last_rx = jiffies;
+ return RX_HANDLER_ANOTHER;
+ } else if (!is_arp) {
+ return RX_HANDLER_ANOTHER;
+ }
+
+ alen = arp_hdr_len(bond->dev);
+
+ netdev_dbg(bond->dev, "bond_arp_rcv: skb->dev %s\n",
+ skb->dev->name);
+
+ if (alen > skb_headlen(skb)) {
+ arp = kmalloc(alen, GFP_ATOMIC);
+ if (!arp)
+ goto out_unlock;
+ if (skb_copy_bits(skb, 0, arp, alen) < 0)
+ goto out_unlock;
+ }
+
+ if (arp->ar_hln != bond->dev->addr_len ||
+ skb->pkt_type == PACKET_OTHERHOST ||
+ skb->pkt_type == PACKET_LOOPBACK ||
+ arp->ar_hrd != htons(ARPHRD_ETHER) ||
+ arp->ar_pro != htons(ETH_P_IP) ||
+ arp->ar_pln != 4)
+ goto out_unlock;
+
+ arp_ptr = (unsigned char *)(arp + 1);
+ arp_ptr += bond->dev->addr_len;
+ memcpy(&sip, arp_ptr, 4);
+ arp_ptr += 4 + bond->dev->addr_len;
+ memcpy(&tip, arp_ptr, 4);
+
+ netdev_dbg(bond->dev, "bond_arp_rcv: %s/%d av %d sv %d sip %pI4 tip %pI4\n",
+ slave->dev->name, bond_slave_state(slave),
+ bond->params.arp_validate, slave_do_arp_validate(bond, slave),
+ &sip, &tip);
+
+ curr_active_slave = rcu_dereference(bond->curr_active_slave);
+ curr_arp_slave = rcu_dereference(bond->current_arp_slave);
+
+ /* We 'trust' the received ARP enough to validate it if:
+ *
+ * (a) the slave receiving the ARP is active (which includes the
+ * current ARP slave, if any), or
+ *
+ * (b) the receiving slave isn't active, but there is a currently
+ * active slave and it received valid arp reply(s) after it became
+ * the currently active slave, or
+ *
+ * (c) there is an ARP slave that sent an ARP during the prior ARP
+ * interval, and we receive an ARP reply on any slave. We accept
+ * these because switch FDB update delays may deliver the ARP
+ * reply to a slave other than the sender of the ARP request.
+ *
+ * Note: for (b), backup slaves are receiving the broadcast ARP
+ * request, not a reply. This request passes from the sending
+ * slave through the L2 switch(es) to the receiving slave. Since
+ * this is checking the request, sip/tip are swapped for
+ * validation.
+ *
+ * This is done to avoid endless looping when we can't reach the
+ * arp_ip_target and fool ourselves with our own arp requests.
+ */
+ if (bond_is_active_slave(slave))
+ bond_validate_arp(bond, slave, sip, tip);
+ else if (curr_active_slave &&
+ time_after(slave_last_rx(bond, curr_active_slave),
+ curr_active_slave->last_link_up))
+ bond_validate_arp(bond, slave, tip, sip);
+ else if (curr_arp_slave && (arp->ar_op == htons(ARPOP_REPLY)) &&
+ bond_time_in_interval(bond,
+ dev_trans_start(curr_arp_slave->dev), 1))
+ bond_validate_arp(bond, slave, sip, tip);
+
+out_unlock:
+ if (arp != (struct arphdr *)skb->data)
+ kfree(arp);
+ return RX_HANDLER_ANOTHER;
+}
+
+/* function to verify if we're in the arp_interval timeslice, returns true if
+ * (last_act - arp_interval) <= jiffies <= (last_act + mod * arp_interval +
+ * arp_interval/2) . the arp_interval/2 is needed for really fast networks.
+ */
+static bool bond_time_in_interval(struct bonding *bond, unsigned long last_act,
+ int mod)
+{
+ int delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
+
+ return time_in_range(jiffies,
+ last_act - delta_in_ticks,
+ last_act + mod * delta_in_ticks + delta_in_ticks/2);
+}
+
+/* This function is called regularly to monitor each slave's link
+ * ensuring that traffic is being sent and received when arp monitoring
+ * is used in load-balancing mode. if the adapter has been dormant, then an
+ * arp is transmitted to generate traffic. see activebackup_arp_monitor for
+ * arp monitoring in active backup mode.
+ */
+static void bond_loadbalance_arp_mon(struct bonding *bond)
+{
+ struct slave *slave, *oldcurrent;
+ struct list_head *iter;
+ int do_failover = 0, slave_state_changed = 0;
+
+ if (!bond_has_slaves(bond))
+ goto re_arm;
+
+ rcu_read_lock();
+
+ oldcurrent = rcu_dereference(bond->curr_active_slave);
+ /* see if any of the previous devices are up now (i.e. they have
+ * xmt and rcv traffic). the curr_active_slave does not come into
+ * the picture unless it is null. also, slave->last_link_up is not
+ * needed here because we send an arp on each slave and give a slave
+ * as long as it needs to get the tx/rx within the delta.
+ * TODO: what about up/down delay in arp mode? it wasn't here before
+ * so it can wait
+ */
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ unsigned long trans_start = dev_trans_start(slave->dev);
+
+ slave->new_link = BOND_LINK_NOCHANGE;
+
+ if (slave->link != BOND_LINK_UP) {
+ if (bond_time_in_interval(bond, trans_start, 1) &&
+ bond_time_in_interval(bond, slave->last_rx, 1)) {
+
+ slave->new_link = BOND_LINK_UP;
+ slave_state_changed = 1;
+
+ /* primary_slave has no meaning in round-robin
+ * mode. the window of a slave being up and
+ * curr_active_slave being null after enslaving
+ * is closed.
+ */
+ if (!oldcurrent) {
+ netdev_info(bond->dev, "link status definitely up for interface %s\n",
+ slave->dev->name);
+ do_failover = 1;
+ } else {
+ netdev_info(bond->dev, "interface %s is now up\n",
+ slave->dev->name);
+ }
+ }
+ } else {
+ /* slave->link == BOND_LINK_UP */
+
+ /* not all switches will respond to an arp request
+ * when the source ip is 0, so don't take the link down
+ * if we don't know our ip yet
+ */
+ if (!bond_time_in_interval(bond, trans_start, 2) ||
+ !bond_time_in_interval(bond, slave->last_rx, 2)) {
+
+ slave->new_link = BOND_LINK_DOWN;
+ slave_state_changed = 1;
+
+ if (slave->link_failure_count < UINT_MAX)
+ slave->link_failure_count++;
+
+ netdev_info(bond->dev, "interface %s is now down\n",
+ slave->dev->name);
+
+ if (slave == oldcurrent)
+ do_failover = 1;
+ }
+ }
+
+ /* note: if switch is in round-robin mode, all links
+ * must tx arp to ensure all links rx an arp - otherwise
+ * links may oscillate or not come up at all; if switch is
+ * in something like xor mode, there is nothing we can
+ * do - all replies will be rx'ed on same link causing slaves
+ * to be unstable during low/no traffic periods
+ */
+ if (bond_slave_is_up(slave))
+ bond_arp_send_all(bond, slave);
+ }
+
+ rcu_read_unlock();
+
+ if (do_failover || slave_state_changed) {
+ if (!rtnl_trylock())
+ goto re_arm;
+
+ bond_for_each_slave(bond, slave, iter) {
+ if (slave->new_link != BOND_LINK_NOCHANGE)
+ slave->link = slave->new_link;
+ }
+
+ if (slave_state_changed) {
+ bond_slave_state_change(bond);
+ if (BOND_MODE(bond) == BOND_MODE_XOR)
+ bond_update_slave_arr(bond, NULL);
+ }
+ if (do_failover) {
+ block_netpoll_tx();
+ bond_select_active_slave(bond);
+ unblock_netpoll_tx();
+ }
+ rtnl_unlock();
+ }
+
+re_arm:
+ if (bond->params.arp_interval)
+ queue_delayed_work(bond->wq, &bond->arp_work,
+ msecs_to_jiffies(bond->params.arp_interval));
+}
+
+/* Called to inspect slaves for active-backup mode ARP monitor link state
+ * changes. Sets new_link in slaves to specify what action should take
+ * place for the slave. Returns 0 if no changes are found, >0 if changes
+ * to link states must be committed.
+ *
+ * Called with rcu_read_lock held.
+ */
+static int bond_ab_arp_inspect(struct bonding *bond)
+{
+ unsigned long trans_start, last_rx;
+ struct list_head *iter;
+ struct slave *slave;
+ int commit = 0;
+
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ slave->new_link = BOND_LINK_NOCHANGE;
+ last_rx = slave_last_rx(bond, slave);
+
+ if (slave->link != BOND_LINK_UP) {
+ if (bond_time_in_interval(bond, last_rx, 1)) {
+ slave->new_link = BOND_LINK_UP;
+ commit++;
+ }
+ continue;
+ }
+
+ /* Give slaves 2*delta after being enslaved or made
+ * active. This avoids bouncing, as the last receive
+ * times need a full ARP monitor cycle to be updated.
+ */
+ if (bond_time_in_interval(bond, slave->last_link_up, 2))
+ continue;
+
+ /* Backup slave is down if:
+ * - No current_arp_slave AND
+ * - more than 3*delta since last receive AND
+ * - the bond has an IP address
+ *
+ * Note: a non-null current_arp_slave indicates
+ * the curr_active_slave went down and we are
+ * searching for a new one; under this condition
+ * we only take the curr_active_slave down - this
+ * gives each slave a chance to tx/rx traffic
+ * before being taken out
+ */
+ if (!bond_is_active_slave(slave) &&
+ !rcu_access_pointer(bond->current_arp_slave) &&
+ !bond_time_in_interval(bond, last_rx, 3)) {
+ slave->new_link = BOND_LINK_DOWN;
+ commit++;
+ }
+
+ /* Active slave is down if:
+ * - more than 2*delta since transmitting OR
+ * - (more than 2*delta since receive AND
+ * the bond has an IP address)
+ */
+ trans_start = dev_trans_start(slave->dev);
+ if (bond_is_active_slave(slave) &&
+ (!bond_time_in_interval(bond, trans_start, 2) ||
+ !bond_time_in_interval(bond, last_rx, 2))) {
+ slave->new_link = BOND_LINK_DOWN;
+ commit++;
+ }
+ }
+
+ return commit;
+}
+
+/* Called to commit link state changes noted by inspection step of
+ * active-backup mode ARP monitor.
+ *
+ * Called with RTNL hold.
+ */
+static void bond_ab_arp_commit(struct bonding *bond)
+{
+ unsigned long trans_start;
+ struct list_head *iter;
+ struct slave *slave;
+
+ bond_for_each_slave(bond, slave, iter) {
+ switch (slave->new_link) {
+ case BOND_LINK_NOCHANGE:
+ continue;
+
+ case BOND_LINK_UP:
+ trans_start = dev_trans_start(slave->dev);
+ if (rtnl_dereference(bond->curr_active_slave) != slave ||
+ (!rtnl_dereference(bond->curr_active_slave) &&
+ bond_time_in_interval(bond, trans_start, 1))) {
+ struct slave *current_arp_slave;
+
+ current_arp_slave = rtnl_dereference(bond->current_arp_slave);
+ bond_set_slave_link_state(slave, BOND_LINK_UP,
+ BOND_SLAVE_NOTIFY_NOW);
+ if (current_arp_slave) {
+ bond_set_slave_inactive_flags(
+ current_arp_slave,
+ BOND_SLAVE_NOTIFY_NOW);
+ RCU_INIT_POINTER(bond->current_arp_slave, NULL);
+ }
+
+ netdev_info(bond->dev, "link status definitely up for interface %s\n",
+ slave->dev->name);
+
+ if (!rtnl_dereference(bond->curr_active_slave) ||
+ slave == rtnl_dereference(bond->primary_slave))
+ goto do_failover;
+
+ }
+
+ continue;
+
+ case BOND_LINK_DOWN:
+ if (slave->link_failure_count < UINT_MAX)
+ slave->link_failure_count++;
+
+ bond_set_slave_link_state(slave, BOND_LINK_DOWN,
+ BOND_SLAVE_NOTIFY_NOW);
+ bond_set_slave_inactive_flags(slave,
+ BOND_SLAVE_NOTIFY_NOW);
+
+ netdev_info(bond->dev, "link status definitely down for interface %s, disabling it\n",
+ slave->dev->name);
+
+ if (slave == rtnl_dereference(bond->curr_active_slave)) {
+ RCU_INIT_POINTER(bond->current_arp_slave, NULL);
+ goto do_failover;
+ }
+
+ continue;
+
+ default:
+ netdev_err(bond->dev, "impossible: new_link %d on slave %s\n",
+ slave->new_link, slave->dev->name);
+ continue;
+ }
+
+do_failover:
+ block_netpoll_tx();
+ bond_select_active_slave(bond);
+ unblock_netpoll_tx();
+ }
+
+ bond_set_carrier(bond);
+}
+
+/* Send ARP probes for active-backup mode ARP monitor.
+ *
+ * Called with rcu_read_lock held.
+ */
+static bool bond_ab_arp_probe(struct bonding *bond)
+{
+ struct slave *slave, *before = NULL, *new_slave = NULL,
+ *curr_arp_slave = rcu_dereference(bond->current_arp_slave),
+ *curr_active_slave = rcu_dereference(bond->curr_active_slave);
+ struct list_head *iter;
+ bool found = false;
+ bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
+
+ if (curr_arp_slave && curr_active_slave)
+ netdev_info(bond->dev, "PROBE: c_arp %s && cas %s BAD\n",
+ curr_arp_slave->dev->name,
+ curr_active_slave->dev->name);
+
+ if (curr_active_slave) {
+ bond_arp_send_all(bond, curr_active_slave);
+ return should_notify_rtnl;
+ }
+
+ /* if we don't have a curr_active_slave, search for the next available
+ * backup slave from the current_arp_slave and make it the candidate
+ * for becoming the curr_active_slave
+ */
+
+ if (!curr_arp_slave) {
+ curr_arp_slave = bond_first_slave_rcu(bond);
+ if (!curr_arp_slave)
+ return should_notify_rtnl;
+ }
+
+ bond_set_slave_inactive_flags(curr_arp_slave, BOND_SLAVE_NOTIFY_LATER);
+
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ if (!found && !before && bond_slave_is_up(slave))
+ before = slave;
+
+ if (found && !new_slave && bond_slave_is_up(slave))
+ new_slave = slave;
+ /* if the link state is up at this point, we
+ * mark it down - this can happen if we have
+ * simultaneous link failures and
+ * reselect_active_interface doesn't make this
+ * one the current slave so it is still marked
+ * up when it is actually down
+ */
+ if (!bond_slave_is_up(slave) && slave->link == BOND_LINK_UP) {
+ bond_set_slave_link_state(slave, BOND_LINK_DOWN,
+ BOND_SLAVE_NOTIFY_LATER);
+ if (slave->link_failure_count < UINT_MAX)
+ slave->link_failure_count++;
+
+ bond_set_slave_inactive_flags(slave,
+ BOND_SLAVE_NOTIFY_LATER);
+
+ netdev_info(bond->dev, "backup interface %s is now down\n",
+ slave->dev->name);
+ }
+ if (slave == curr_arp_slave)
+ found = true;
+ }
+
+ if (!new_slave && before)
+ new_slave = before;
+
+ if (!new_slave)
+ goto check_state;
+
+ bond_set_slave_link_state(new_slave, BOND_LINK_BACK,
+ BOND_SLAVE_NOTIFY_LATER);
+ bond_set_slave_active_flags(new_slave, BOND_SLAVE_NOTIFY_LATER);
+ bond_arp_send_all(bond, new_slave);
+ new_slave->last_link_up = jiffies;
+ rcu_assign_pointer(bond->current_arp_slave, new_slave);
+
+check_state:
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ if (slave->should_notify || slave->should_notify_link) {
+ should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
+ break;
+ }
+ }
+ return should_notify_rtnl;
+}
+
+static void bond_activebackup_arp_mon(struct bonding *bond)
+{
+ bool should_notify_peers = false;
+ bool should_notify_rtnl = false;
+ int delta_in_ticks;
+
+ delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
+
+ if (!bond_has_slaves(bond))
+ goto re_arm;
+
+ rcu_read_lock();
+
+ should_notify_peers = bond_should_notify_peers(bond);
+
+ if (bond_ab_arp_inspect(bond)) {
+ rcu_read_unlock();
+
+ /* Race avoidance with bond_close flush of workqueue */
+ if (!rtnl_trylock()) {
+ delta_in_ticks = 1;
+ should_notify_peers = false;
+ goto re_arm;
+ }
+
+ bond_ab_arp_commit(bond);
+
+ rtnl_unlock();
+ rcu_read_lock();
+ }
+
+ should_notify_rtnl = bond_ab_arp_probe(bond);
+ rcu_read_unlock();
+
+re_arm:
+ if (bond->params.arp_interval)
+ queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
+
+ if (should_notify_peers || should_notify_rtnl) {
+ if (!rtnl_trylock())
+ return;
+
+ if (should_notify_peers)
+ call_netdevice_notifiers(NETDEV_NOTIFY_PEERS,
+ bond->dev);
+ if (should_notify_rtnl) {
+ bond_slave_state_notify(bond);
+ bond_slave_link_notify(bond);
+ }
+
+ rtnl_unlock();
+ }
+}
+
+static void bond_arp_monitor(struct work_struct *work)
+{
+ struct bonding *bond = container_of(work, struct bonding,
+ arp_work.work);
+
+ if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
+ bond_activebackup_arp_mon(bond);
+ else
+ bond_loadbalance_arp_mon(bond);
+}
+
+/*-------------------------- netdev event handling --------------------------*/
+
+/* Change device name */
+static int bond_event_changename(struct bonding *bond)
+{
+ bond_remove_proc_entry(bond);
+ bond_create_proc_entry(bond);
+
+ bond_debug_reregister(bond);
+
+ return NOTIFY_DONE;
+}
+
+static int bond_master_netdev_event(unsigned long event,
+ struct net_device *bond_dev)
+{
+ struct bonding *event_bond = netdev_priv(bond_dev);
+
+ switch (event) {
+ case NETDEV_CHANGENAME:
+ return bond_event_changename(event_bond);
+ case NETDEV_UNREGISTER:
+ bond_remove_proc_entry(event_bond);
+ break;
+ case NETDEV_REGISTER:
+ bond_create_proc_entry(event_bond);
+ break;
+ case NETDEV_NOTIFY_PEERS:
+ if (event_bond->send_peer_notif)
+ event_bond->send_peer_notif--;
+ break;
+ default:
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static int bond_slave_netdev_event(unsigned long event,
+ struct net_device *slave_dev)
+{
+ struct slave *slave = bond_slave_get_rtnl(slave_dev), *primary;
+ struct bonding *bond;
+ struct net_device *bond_dev;
+
+ /* A netdev event can be generated while enslaving a device
+ * before netdev_rx_handler_register is called in which case
+ * slave will be NULL
+ */
+ if (!slave)
+ return NOTIFY_DONE;
+ bond_dev = slave->bond->dev;
+ bond = slave->bond;
+ primary = rtnl_dereference(bond->primary_slave);
+
+ switch (event) {
+ case NETDEV_UNREGISTER:
+ if (bond_dev->type != ARPHRD_ETHER)
+ bond_release_and_destroy(bond_dev, slave_dev);
+ else
+ __bond_release_one(bond_dev, slave_dev, false, true);
+ break;
+ case NETDEV_UP:
+ case NETDEV_CHANGE:
+ /* For 802.3ad mode only:
+ * Getting invalid Speed/Duplex values here will put slave
+ * in weird state. So mark it as link-fail for the time
+ * being and let link-monitoring (miimon) set it right when
+ * correct speeds/duplex are available.
+ */
+ if (bond_update_speed_duplex(slave) &&
+ BOND_MODE(bond) == BOND_MODE_8023AD)
+ slave->link = BOND_LINK_FAIL;
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD)
+ bond_3ad_adapter_speed_duplex_changed(slave);
+ /* Fallthrough */
+ case NETDEV_DOWN:
+ /* Refresh slave-array if applicable!
+ * If the setup does not use miimon or arpmon (mode-specific!),
+ * then these events will not cause the slave-array to be
+ * refreshed. This will cause xmit to use a slave that is not
+ * usable. Avoid such situation by refeshing the array at these
+ * events. If these (miimon/arpmon) parameters are configured
+ * then array gets refreshed twice and that should be fine!
+ */
+ if (bond_mode_can_use_xmit_hash(bond))
+ bond_update_slave_arr(bond, NULL);
+ break;
+ case NETDEV_CHANGEMTU:
+ /* TODO: Should slaves be allowed to
+ * independently alter their MTU? For
+ * an active-backup bond, slaves need
+ * not be the same type of device, so
+ * MTUs may vary. For other modes,
+ * slaves arguably should have the
+ * same MTUs. To do this, we'd need to
+ * take over the slave's change_mtu
+ * function for the duration of their
+ * servitude.
+ */
+ break;
+ case NETDEV_CHANGENAME:
+ /* we don't care if we don't have primary set */
+ if (!bond_uses_primary(bond) ||
+ !bond->params.primary[0])
+ break;
+
+ if (slave == primary) {
+ /* slave's name changed - he's no longer primary */
+ RCU_INIT_POINTER(bond->primary_slave, NULL);
+ } else if (!strcmp(slave_dev->name, bond->params.primary)) {
+ /* we have a new primary slave */
+ rcu_assign_pointer(bond->primary_slave, slave);
+ } else { /* we didn't change primary - exit */
+ break;
+ }
+
+ netdev_info(bond->dev, "Primary slave changed to %s, reselecting active slave\n",
+ primary ? slave_dev->name : "none");
+
+ block_netpoll_tx();
+ bond_select_active_slave(bond);
+ unblock_netpoll_tx();
+ break;
+ case NETDEV_FEAT_CHANGE:
+ bond_compute_features(bond);
+ break;
+ case NETDEV_RESEND_IGMP:
+ /* Propagate to master device */
+ call_netdevice_notifiers(event, slave->bond->dev);
+ break;
+ default:
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+/* bond_netdev_event: handle netdev notifier chain events.
+ *
+ * This function receives events for the netdev chain. The caller (an
+ * ioctl handler calling blocking_notifier_call_chain) holds the necessary
+ * locks for us to safely manipulate the slave devices (RTNL lock,
+ * dev_probe_lock).
+ */
+static int bond_netdev_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct net_device *event_dev = netdev_notifier_info_to_dev(ptr);
+
+ netdev_dbg(event_dev, "event: %lx\n", event);
+
+ if (!(event_dev->priv_flags & IFF_BONDING))
+ return NOTIFY_DONE;
+
+ if (event_dev->flags & IFF_MASTER) {
+ netdev_dbg(event_dev, "IFF_MASTER\n");
+ return bond_master_netdev_event(event, event_dev);
+ }
+
+ if (event_dev->flags & IFF_SLAVE) {
+ netdev_dbg(event_dev, "IFF_SLAVE\n");
+ return bond_slave_netdev_event(event, event_dev);
+ }
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block bond_netdev_notifier = {
+ .notifier_call = bond_netdev_event,
+};
+
+/*---------------------------- Hashing Policies -----------------------------*/
+
+/* L2 hash helper */
+static inline u32 bond_eth_hash(struct sk_buff *skb)
+{
+ struct ethhdr *ep, hdr_tmp;
+
+ ep = skb_header_pointer(skb, 0, sizeof(hdr_tmp), &hdr_tmp);
+ if (ep)
+ return ep->h_dest[5] ^ ep->h_source[5] ^ ep->h_proto;
+ return 0;
+}
+
+/* Extract the appropriate headers based on bond's xmit policy */
+static bool bond_flow_dissect(struct bonding *bond, struct sk_buff *skb,
+ struct flow_keys *fk)
+{
+ const struct ipv6hdr *iph6;
+ const struct iphdr *iph;
+ int noff, proto = -1;
+
+ if (bond->params.xmit_policy > BOND_XMIT_POLICY_LAYER23)
+ return skb_flow_dissect_flow_keys(skb, fk, 0);
+
+ fk->ports.ports = 0;
+ noff = skb_network_offset(skb);
+ if (skb->protocol == htons(ETH_P_IP)) {
+ if (unlikely(!pskb_may_pull(skb, noff + sizeof(*iph))))
+ return false;
+ iph = ip_hdr(skb);
+ iph_to_flow_copy_v4addrs(fk, iph);
+ noff += iph->ihl << 2;
+ if (!ip_is_fragment(iph))
+ proto = iph->protocol;
+ } else if (skb->protocol == htons(ETH_P_IPV6)) {
+ if (unlikely(!pskb_may_pull(skb, noff + sizeof(*iph6))))
+ return false;
+ iph6 = ipv6_hdr(skb);
+ iph_to_flow_copy_v6addrs(fk, iph6);
+ noff += sizeof(*iph6);
+ proto = iph6->nexthdr;
+ } else {
+ return false;
+ }
+ if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34 && proto >= 0)
+ fk->ports.ports = skb_flow_get_ports(skb, noff, proto);
+
+ return true;
+}
+
+/**
+ * bond_xmit_hash - generate a hash value based on the xmit policy
+ * @bond: bonding device
+ * @skb: buffer to use for headers
+ *
+ * This function will extract the necessary headers from the skb buffer and use
+ * them to generate a hash based on the xmit_policy set in the bonding device
+ */
+u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb)
+{
+ struct flow_keys flow;
+ u32 hash;
+
+ if (bond->params.xmit_policy == BOND_XMIT_POLICY_ENCAP34 &&
+ skb->l4_hash)
+ return skb->hash;
+
+ if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER2 ||
+ !bond_flow_dissect(bond, skb, &flow))
+ return bond_eth_hash(skb);
+
+ if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER23 ||
+ bond->params.xmit_policy == BOND_XMIT_POLICY_ENCAP23)
+ hash = bond_eth_hash(skb);
+ else
+ hash = (__force u32)flow.ports.ports;
+ hash ^= (__force u32)flow_get_u32_dst(&flow) ^
+ (__force u32)flow_get_u32_src(&flow);
+ hash ^= (hash >> 16);
+ hash ^= (hash >> 8);
+
+ return hash >> 1;
+}
+
+/*-------------------------- Device entry points ----------------------------*/
+
+void bond_work_init_all(struct bonding *bond)
+{
+ INIT_DELAYED_WORK(&bond->mcast_work,
+ bond_resend_igmp_join_requests_delayed);
+ INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
+ INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
+ INIT_DELAYED_WORK(&bond->arp_work, bond_arp_monitor);
+ INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
+ INIT_DELAYED_WORK(&bond->slave_arr_work, bond_slave_arr_handler);
+}
+
+static void bond_work_cancel_all(struct bonding *bond)
+{
+ cancel_delayed_work_sync(&bond->mii_work);
+ cancel_delayed_work_sync(&bond->arp_work);
+ cancel_delayed_work_sync(&bond->alb_work);
+ cancel_delayed_work_sync(&bond->ad_work);
+ cancel_delayed_work_sync(&bond->mcast_work);
+ cancel_delayed_work_sync(&bond->slave_arr_work);
+}
+
+static int bond_open(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct list_head *iter;
+ struct slave *slave;
+
+ /* reset slave->backup and slave->inactive */
+ if (bond_has_slaves(bond)) {
+ bond_for_each_slave(bond, slave, iter) {
+ if (bond_uses_primary(bond) &&
+ slave != rcu_access_pointer(bond->curr_active_slave)) {
+ bond_set_slave_inactive_flags(slave,
+ BOND_SLAVE_NOTIFY_NOW);
+ } else if (BOND_MODE(bond) != BOND_MODE_8023AD) {
+ bond_set_slave_active_flags(slave,
+ BOND_SLAVE_NOTIFY_NOW);
+ }
+ }
+ }
+
+ if (bond_is_lb(bond)) {
+ /* bond_alb_initialize must be called before the timer
+ * is started.
+ */
+ if (bond_alb_initialize(bond, (BOND_MODE(bond) == BOND_MODE_ALB)))
+ return -ENOMEM;
+ if (bond->params.tlb_dynamic_lb || BOND_MODE(bond) == BOND_MODE_ALB)
+ queue_delayed_work(bond->wq, &bond->alb_work, 0);
+ }
+
+ if (bond->params.miimon) /* link check interval, in milliseconds. */
+ queue_delayed_work(bond->wq, &bond->mii_work, 0);
+
+ if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
+ queue_delayed_work(bond->wq, &bond->arp_work, 0);
+ bond->recv_probe = bond_arp_rcv;
+ }
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+ queue_delayed_work(bond->wq, &bond->ad_work, 0);
+ /* register to receive LACPDUs */
+ bond->recv_probe = bond_3ad_lacpdu_recv;
+ bond_3ad_initiate_agg_selection(bond, 1);
+ }
+
+ if (bond_mode_can_use_xmit_hash(bond))
+ bond_update_slave_arr(bond, NULL);
+
+ return 0;
+}
+
+static int bond_close(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+
+ bond_work_cancel_all(bond);
+ bond->send_peer_notif = 0;
+ if (bond_is_lb(bond))
+ bond_alb_deinitialize(bond);
+ bond->recv_probe = NULL;
+
+ return 0;
+}
+
+/* fold stats, assuming all rtnl_link_stats64 fields are u64, but
+ * that some drivers can provide 32bit values only.
+ */
+static void bond_fold_stats(struct rtnl_link_stats64 *_res,
+ const struct rtnl_link_stats64 *_new,
+ const struct rtnl_link_stats64 *_old)
+{
+ const u64 *new = (const u64 *)_new;
+ const u64 *old = (const u64 *)_old;
+ u64 *res = (u64 *)_res;
+ int i;
+
+ for (i = 0; i < sizeof(*_res) / sizeof(u64); i++) {
+ u64 nv = new[i];
+ u64 ov = old[i];
+ s64 delta = nv - ov;
+
+ /* detects if this particular field is 32bit only */
+ if (((nv | ov) >> 32) == 0)
+ delta = (s64)(s32)((u32)nv - (u32)ov);
+
+ /* filter anomalies, some drivers reset their stats
+ * at down/up events.
+ */
+ if (delta > 0)
+ res[i] += delta;
+ }
+}
+
+static int bond_get_nest_level(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+
+ return bond->nest_level;
+}
+
+static void bond_get_stats(struct net_device *bond_dev,
+ struct rtnl_link_stats64 *stats)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct rtnl_link_stats64 temp;
+ struct list_head *iter;
+ struct slave *slave;
+
+ spin_lock_nested(&bond->stats_lock, bond_get_nest_level(bond_dev));
+ memcpy(stats, &bond->bond_stats, sizeof(*stats));
+
+ rcu_read_lock();
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ const struct rtnl_link_stats64 *new =
+ dev_get_stats(slave->dev, &temp);
+
+ bond_fold_stats(stats, new, &slave->slave_stats);
+
+ /* save off the slave stats for the next run */
+ memcpy(&slave->slave_stats, new, sizeof(*new));
+ }
+ rcu_read_unlock();
+
+ memcpy(&bond->bond_stats, stats, sizeof(*stats));
+ spin_unlock(&bond->stats_lock);
+}
+
+static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct net_device *slave_dev = NULL;
+ struct ifbond k_binfo;
+ struct ifbond __user *u_binfo = NULL;
+ struct ifslave k_sinfo;
+ struct ifslave __user *u_sinfo = NULL;
+ struct mii_ioctl_data *mii = NULL;
+ struct bond_opt_value newval;
+ struct net *net;
+ int res = 0;
+
+ netdev_dbg(bond_dev, "bond_ioctl: cmd=%d\n", cmd);
+
+ switch (cmd) {
+ case SIOCGMIIPHY:
+ mii = if_mii(ifr);
+ if (!mii)
+ return -EINVAL;
+
+ mii->phy_id = 0;
+ /* Fall Through */
+ case SIOCGMIIREG:
+ /* We do this again just in case we were called by SIOCGMIIREG
+ * instead of SIOCGMIIPHY.
+ */
+ mii = if_mii(ifr);
+ if (!mii)
+ return -EINVAL;
+
+ if (mii->reg_num == 1) {
+ mii->val_out = 0;
+ if (netif_carrier_ok(bond->dev))
+ mii->val_out = BMSR_LSTATUS;
+ }
+
+ return 0;
+ case BOND_INFO_QUERY_OLD:
+ case SIOCBONDINFOQUERY:
+ u_binfo = (struct ifbond __user *)ifr->ifr_data;
+
+ if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond)))
+ return -EFAULT;
+
+ bond_info_query(bond_dev, &k_binfo);
+ if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond)))
+ return -EFAULT;
+
+ return 0;
+ case BOND_SLAVE_INFO_QUERY_OLD:
+ case SIOCBONDSLAVEINFOQUERY:
+ u_sinfo = (struct ifslave __user *)ifr->ifr_data;
+
+ if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave)))
+ return -EFAULT;
+
+ res = bond_slave_info_query(bond_dev, &k_sinfo);
+ if (res == 0 &&
+ copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave)))
+ return -EFAULT;
+
+ return res;
+ default:
+ break;
+ }
+
+ net = dev_net(bond_dev);
+
+ if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
+ return -EPERM;
+
+ slave_dev = __dev_get_by_name(net, ifr->ifr_slave);
+
+ netdev_dbg(bond_dev, "slave_dev=%p:\n", slave_dev);
+
+ if (!slave_dev)
+ return -ENODEV;
+
+ netdev_dbg(bond_dev, "slave_dev->name=%s:\n", slave_dev->name);
+ switch (cmd) {
+ case BOND_ENSLAVE_OLD:
+ case SIOCBONDENSLAVE:
+ res = bond_enslave(bond_dev, slave_dev, NULL);
+ break;
+ case BOND_RELEASE_OLD:
+ case SIOCBONDRELEASE:
+ res = bond_release(bond_dev, slave_dev);
+ break;
+ case BOND_SETHWADDR_OLD:
+ case SIOCBONDSETHWADDR:
+ bond_set_dev_addr(bond_dev, slave_dev);
+ res = 0;
+ break;
+ case BOND_CHANGE_ACTIVE_OLD:
+ case SIOCBONDCHANGEACTIVE:
+ bond_opt_initstr(&newval, slave_dev->name);
+ res = __bond_opt_set_notify(bond, BOND_OPT_ACTIVE_SLAVE,
+ &newval);
+ break;
+ default:
+ res = -EOPNOTSUPP;
+ }
+
+ return res;
+}
+
+static void bond_change_rx_flags(struct net_device *bond_dev, int change)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+
+ if (change & IFF_PROMISC)
+ bond_set_promiscuity(bond,
+ bond_dev->flags & IFF_PROMISC ? 1 : -1);
+
+ if (change & IFF_ALLMULTI)
+ bond_set_allmulti(bond,
+ bond_dev->flags & IFF_ALLMULTI ? 1 : -1);
+}
+
+static void bond_set_rx_mode(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct list_head *iter;
+ struct slave *slave;
+
+ rcu_read_lock();
+ if (bond_uses_primary(bond)) {
+ slave = rcu_dereference(bond->curr_active_slave);
+ if (slave) {
+ dev_uc_sync(slave->dev, bond_dev);
+ dev_mc_sync(slave->dev, bond_dev);
+ }
+ } else {
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ dev_uc_sync_multiple(slave->dev, bond_dev);
+ dev_mc_sync_multiple(slave->dev, bond_dev);
+ }
+ }
+ rcu_read_unlock();
+}
+
+static int bond_neigh_init(struct neighbour *n)
+{
+ struct bonding *bond = netdev_priv(n->dev);
+ const struct net_device_ops *slave_ops;
+ struct neigh_parms parms;
+ struct slave *slave;
+ int ret;
+
+ slave = bond_first_slave(bond);
+ if (!slave)
+ return 0;
+ slave_ops = slave->dev->netdev_ops;
+ if (!slave_ops->ndo_neigh_setup)
+ return 0;
+
+ parms.neigh_setup = NULL;
+ parms.neigh_cleanup = NULL;
+ ret = slave_ops->ndo_neigh_setup(slave->dev, &parms);
+ if (ret)
+ return ret;
+
+ /* Assign slave's neigh_cleanup to neighbour in case cleanup is called
+ * after the last slave has been detached. Assumes that all slaves
+ * utilize the same neigh_cleanup (true at this writing as only user
+ * is ipoib).
+ */
+ n->parms->neigh_cleanup = parms.neigh_cleanup;
+
+ if (!parms.neigh_setup)
+ return 0;
+
+ return parms.neigh_setup(n);
+}
+
+/* The bonding ndo_neigh_setup is called at init time beofre any
+ * slave exists. So we must declare proxy setup function which will
+ * be used at run time to resolve the actual slave neigh param setup.
+ *
+ * It's also called by master devices (such as vlans) to setup their
+ * underlying devices. In that case - do nothing, we're already set up from
+ * our init.
+ */
+static int bond_neigh_setup(struct net_device *dev,
+ struct neigh_parms *parms)
+{
+ /* modify only our neigh_parms */
+ if (parms->dev == dev)
+ parms->neigh_setup = bond_neigh_init;
+
+ return 0;
+}
+
+/* Change the MTU of all of a master's slaves to match the master */
+static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave, *rollback_slave;
+ struct list_head *iter;
+ int res = 0;
+
+ netdev_dbg(bond_dev, "bond=%p, new_mtu=%d\n", bond, new_mtu);
+
+ bond_for_each_slave(bond, slave, iter) {
+ netdev_dbg(bond_dev, "s %p c_m %p\n",
+ slave, slave->dev->netdev_ops->ndo_change_mtu);
+
+ res = dev_set_mtu(slave->dev, new_mtu);
+
+ if (res) {
+ /* If we failed to set the slave's mtu to the new value
+ * we must abort the operation even in ACTIVE_BACKUP
+ * mode, because if we allow the backup slaves to have
+ * different mtu values than the active slave we'll
+ * need to change their mtu when doing a failover. That
+ * means changing their mtu from timer context, which
+ * is probably not a good idea.
+ */
+ netdev_dbg(bond_dev, "err %d %s\n", res,
+ slave->dev->name);
+ goto unwind;
+ }
+ }
+
+ bond_dev->mtu = new_mtu;
+
+ return 0;
+
+unwind:
+ /* unwind from head to the slave that failed */
+ bond_for_each_slave(bond, rollback_slave, iter) {
+ int tmp_res;
+
+ if (rollback_slave == slave)
+ break;
+
+ tmp_res = dev_set_mtu(rollback_slave->dev, bond_dev->mtu);
+ if (tmp_res) {
+ netdev_dbg(bond_dev, "unwind err %d dev %s\n",
+ tmp_res, rollback_slave->dev->name);
+ }
+ }
+
+ return res;
+}
+
+/* Change HW address
+ *
+ * Note that many devices must be down to change the HW address, and
+ * downing the master releases all slaves. We can make bonds full of
+ * bonding devices to test this, however.
+ */
+static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave, *rollback_slave;
+ struct sockaddr_storage *ss = addr, tmp_ss;
+ struct list_head *iter;
+ int res = 0;
+
+ if (BOND_MODE(bond) == BOND_MODE_ALB)
+ return bond_alb_set_mac_address(bond_dev, addr);
+
+
+ netdev_dbg(bond_dev, "bond=%p\n", bond);
+
+ /* If fail_over_mac is enabled, do nothing and return success.
+ * Returning an error causes ifenslave to fail.
+ */
+ if (bond->params.fail_over_mac &&
+ BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
+ return 0;
+
+ if (!is_valid_ether_addr(ss->__data))
+ return -EADDRNOTAVAIL;
+
+ bond_for_each_slave(bond, slave, iter) {
+ netdev_dbg(bond_dev, "slave %p %s\n", slave, slave->dev->name);
+ res = dev_set_mac_address(slave->dev, addr);
+ if (res) {
+ /* TODO: consider downing the slave
+ * and retry ?
+ * User should expect communications
+ * breakage anyway until ARP finish
+ * updating, so...
+ */
+ netdev_dbg(bond_dev, "err %d %s\n", res, slave->dev->name);
+ goto unwind;
+ }
+ }
+
+ /* success */
+ memcpy(bond_dev->dev_addr, ss->__data, bond_dev->addr_len);
+ return 0;
+
+unwind:
+ memcpy(tmp_ss.__data, bond_dev->dev_addr, bond_dev->addr_len);
+ tmp_ss.ss_family = bond_dev->type;
+
+ /* unwind from head to the slave that failed */
+ bond_for_each_slave(bond, rollback_slave, iter) {
+ int tmp_res;
+
+ if (rollback_slave == slave)
+ break;
+
+ tmp_res = dev_set_mac_address(rollback_slave->dev,
+ (struct sockaddr *)&tmp_ss);
+ if (tmp_res) {
+ netdev_dbg(bond_dev, "unwind err %d dev %s\n",
+ tmp_res, rollback_slave->dev->name);
+ }
+ }
+
+ return res;
+}
+
+/**
+ * bond_xmit_slave_id - transmit skb through slave with slave_id
+ * @bond: bonding device that is transmitting
+ * @skb: buffer to transmit
+ * @slave_id: slave id up to slave_cnt-1 through which to transmit
+ *
+ * This function tries to transmit through slave with slave_id but in case
+ * it fails, it tries to find the first available slave for transmission.
+ * The skb is consumed in all cases, thus the function is void.
+ */
+static void bond_xmit_slave_id(struct bonding *bond, struct sk_buff *skb, int slave_id)
+{
+ struct list_head *iter;
+ struct slave *slave;
+ int i = slave_id;
+
+ /* Here we start from the slave with slave_id */
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ if (--i < 0) {
+ if (bond_slave_can_tx(slave)) {
+ bond_dev_queue_xmit(bond, skb, slave->dev);
+ return;
+ }
+ }
+ }
+
+ /* Here we start from the first slave up to slave_id */
+ i = slave_id;
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ if (--i < 0)
+ break;
+ if (bond_slave_can_tx(slave)) {
+ bond_dev_queue_xmit(bond, skb, slave->dev);
+ return;
+ }
+ }
+ /* no slave that can tx has been found */
+ bond_tx_drop(bond->dev, skb);
+}
+
+/**
+ * bond_rr_gen_slave_id - generate slave id based on packets_per_slave
+ * @bond: bonding device to use
+ *
+ * Based on the value of the bonding device's packets_per_slave parameter
+ * this function generates a slave id, which is usually used as the next
+ * slave to transmit through.
+ */
+static u32 bond_rr_gen_slave_id(struct bonding *bond)
+{
+ u32 slave_id;
+ struct reciprocal_value reciprocal_packets_per_slave;
+ int packets_per_slave = bond->params.packets_per_slave;
+
+ switch (packets_per_slave) {
+ case 0:
+ slave_id = prandom_u32();
+ break;
+ case 1:
+ slave_id = bond->rr_tx_counter;
+ break;
+ default:
+ reciprocal_packets_per_slave =
+ bond->params.reciprocal_packets_per_slave;
+ slave_id = reciprocal_divide(bond->rr_tx_counter,
+ reciprocal_packets_per_slave);
+ break;
+ }
+ bond->rr_tx_counter++;
+
+ return slave_id;
+}
+
+static netdev_tx_t bond_xmit_roundrobin(struct sk_buff *skb,
+ struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct iphdr *iph = ip_hdr(skb);
+ struct slave *slave;
+ u32 slave_id;
+
+ /* Start with the curr_active_slave that joined the bond as the
+ * default for sending IGMP traffic. For failover purposes one
+ * needs to maintain some consistency for the interface that will
+ * send the join/membership reports. The curr_active_slave found
+ * will send all of this type of traffic.
+ */
+ if (iph->protocol == IPPROTO_IGMP && skb->protocol == htons(ETH_P_IP)) {
+ slave = rcu_dereference(bond->curr_active_slave);
+ if (slave)
+ bond_dev_queue_xmit(bond, skb, slave->dev);
+ else
+ bond_xmit_slave_id(bond, skb, 0);
+ } else {
+ int slave_cnt = READ_ONCE(bond->slave_cnt);
+
+ if (likely(slave_cnt)) {
+ slave_id = bond_rr_gen_slave_id(bond);
+ bond_xmit_slave_id(bond, skb, slave_id % slave_cnt);
+ } else {
+ bond_tx_drop(bond_dev, skb);
+ }
+ }
+
+ return NETDEV_TX_OK;
+}
+
+/* In active-backup mode, we know that bond->curr_active_slave is always valid if
+ * the bond has a usable interface.
+ */
+static netdev_tx_t bond_xmit_activebackup(struct sk_buff *skb,
+ struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave;
+
+ slave = rcu_dereference(bond->curr_active_slave);
+ if (slave)
+ bond_dev_queue_xmit(bond, skb, slave->dev);
+ else
+ bond_tx_drop(bond_dev, skb);
+
+ return NETDEV_TX_OK;
+}
+
+/* Use this to update slave_array when (a) it's not appropriate to update
+ * slave_array right away (note that update_slave_array() may sleep)
+ * and / or (b) RTNL is not held.
+ */
+void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay)
+{
+ queue_delayed_work(bond->wq, &bond->slave_arr_work, delay);
+}
+
+/* Slave array work handler. Holds only RTNL */
+static void bond_slave_arr_handler(struct work_struct *work)
+{
+ struct bonding *bond = container_of(work, struct bonding,
+ slave_arr_work.work);
+ int ret;
+
+ if (!rtnl_trylock())
+ goto err;
+
+ ret = bond_update_slave_arr(bond, NULL);
+ rtnl_unlock();
+ if (ret) {
+ pr_warn_ratelimited("Failed to update slave array from WT\n");
+ goto err;
+ }
+ return;
+
+err:
+ bond_slave_arr_work_rearm(bond, 1);
+}
+
+/* Build the usable slaves array in control path for modes that use xmit-hash
+ * to determine the slave interface -
+ * (a) BOND_MODE_8023AD
+ * (b) BOND_MODE_XOR
+ * (c) (BOND_MODE_TLB || BOND_MODE_ALB) && tlb_dynamic_lb == 0
+ *
+ * The caller is expected to hold RTNL only and NO other lock!
+ */
+int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)
+{
+ struct slave *slave;
+ struct list_head *iter;
+ struct bond_up_slave *new_arr, *old_arr;
+ int agg_id = 0;
+ int ret = 0;
+
+#ifdef CONFIG_LOCKDEP
+ WARN_ON(lockdep_is_held(&bond->mode_lock));
+#endif
+
+ new_arr = kzalloc(offsetof(struct bond_up_slave, arr[bond->slave_cnt]),
+ GFP_KERNEL);
+ if (!new_arr) {
+ ret = -ENOMEM;
+ pr_err("Failed to build slave-array.\n");
+ goto out;
+ }
+ if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+ struct ad_info ad_info;
+
+ if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
+ pr_debug("bond_3ad_get_active_agg_info failed\n");
+ kfree_rcu(new_arr, rcu);
+ /* No active aggragator means it's not safe to use
+ * the previous array.
+ */
+ old_arr = rtnl_dereference(bond->slave_arr);
+ if (old_arr) {
+ RCU_INIT_POINTER(bond->slave_arr, NULL);
+ kfree_rcu(old_arr, rcu);
+ }
+ goto out;
+ }
+ agg_id = ad_info.aggregator_id;
+ }
+ bond_for_each_slave(bond, slave, iter) {
+ if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+ struct aggregator *agg;
+
+ agg = SLAVE_AD_INFO(slave)->port.aggregator;
+ if (!agg || agg->aggregator_identifier != agg_id)
+ continue;
+ }
+ if (!bond_slave_can_tx(slave))
+ continue;
+ if (skipslave == slave)
+ continue;
+
+ netdev_dbg(bond->dev,
+ "Adding slave dev %s to tx hash array[%d]\n",
+ slave->dev->name, new_arr->count);
+
+ new_arr->arr[new_arr->count++] = slave;
+ }
+
+ old_arr = rtnl_dereference(bond->slave_arr);
+ rcu_assign_pointer(bond->slave_arr, new_arr);
+ if (old_arr)
+ kfree_rcu(old_arr, rcu);
+out:
+ if (ret != 0 && skipslave) {
+ int idx;
+
+ /* Rare situation where caller has asked to skip a specific
+ * slave but allocation failed (most likely!). BTW this is
+ * only possible when the call is initiated from
+ * __bond_release_one(). In this situation; overwrite the
+ * skipslave entry in the array with the last entry from the
+ * array to avoid a situation where the xmit path may choose
+ * this to-be-skipped slave to send a packet out.
+ */
+ old_arr = rtnl_dereference(bond->slave_arr);
+ for (idx = 0; idx < old_arr->count; idx++) {
+ if (skipslave == old_arr->arr[idx]) {
+ old_arr->arr[idx] =
+ old_arr->arr[old_arr->count-1];
+ old_arr->count--;
+ break;
+ }
+ }
+ }
+ return ret;
+}
+
+/* Use this Xmit function for 3AD as well as XOR modes. The current
+ * usable slave array is formed in the control path. The xmit function
+ * just calculates hash and sends the packet out.
+ */
+static netdev_tx_t bond_3ad_xor_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct bonding *bond = netdev_priv(dev);
+ struct slave *slave;
+ struct bond_up_slave *slaves;
+ unsigned int count;
+
+ slaves = rcu_dereference(bond->slave_arr);
+ count = slaves ? READ_ONCE(slaves->count) : 0;
+ if (likely(count)) {
+ slave = slaves->arr[bond_xmit_hash(bond, skb) % count];
+ bond_dev_queue_xmit(bond, skb, slave->dev);
+ } else {
+ bond_tx_drop(dev, skb);
+ }
+
+ return NETDEV_TX_OK;
+}
+
+/* in broadcast mode, we send everything to all usable interfaces. */
+static netdev_tx_t bond_xmit_broadcast(struct sk_buff *skb,
+ struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave = NULL;
+ struct list_head *iter;
+
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ if (bond_is_last_slave(bond, slave))
+ break;
+ if (bond_slave_is_up(slave) && slave->link == BOND_LINK_UP) {
+ struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
+
+ if (!skb2) {
+ net_err_ratelimited("%s: Error: %s: skb_clone() failed\n",
+ bond_dev->name, __func__);
+ continue;
+ }
+ bond_dev_queue_xmit(bond, skb2, slave->dev);
+ }
+ }
+ if (slave && bond_slave_is_up(slave) && slave->link == BOND_LINK_UP)
+ bond_dev_queue_xmit(bond, skb, slave->dev);
+ else
+ bond_tx_drop(bond_dev, skb);
+
+ return NETDEV_TX_OK;
+}
+
+/*------------------------- Device initialization ---------------------------*/
+
+/* Lookup the slave that corresponds to a qid */
+static inline int bond_slave_override(struct bonding *bond,
+ struct sk_buff *skb)
+{
+ struct slave *slave = NULL;
+ struct list_head *iter;
+
+ if (!skb_rx_queue_recorded(skb))
+ return 1;
+
+ /* Find out if any slaves have the same mapping as this skb. */
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ if (slave->queue_id == skb_get_queue_mapping(skb)) {
+ if (bond_slave_is_up(slave) &&
+ slave->link == BOND_LINK_UP) {
+ bond_dev_queue_xmit(bond, skb, slave->dev);
+ return 0;
+ }
+ /* If the slave isn't UP, use default transmit policy. */
+ break;
+ }
+ }
+
+ return 1;
+}
+
+
+static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb,
+ struct net_device *sb_dev,
+ select_queue_fallback_t fallback)
+{
+ /* This helper function exists to help dev_pick_tx get the correct
+ * destination queue. Using a helper function skips a call to
+ * skb_tx_hash and will put the skbs in the queue we expect on their
+ * way down to the bonding driver.
+ */
+ u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
+
+ /* Save the original txq to restore before passing to the driver */
+ qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb_get_queue_mapping(skb);
+
+ if (unlikely(txq >= dev->real_num_tx_queues)) {
+ do {
+ txq -= dev->real_num_tx_queues;
+ } while (txq >= dev->real_num_tx_queues);
+ }
+ return txq;
+}
+
+static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct bonding *bond = netdev_priv(dev);
+
+ if (bond_should_override_tx_queue(bond) &&
+ !bond_slave_override(bond, skb))
+ return NETDEV_TX_OK;
+
+ switch (BOND_MODE(bond)) {
+ case BOND_MODE_ROUNDROBIN:
+ return bond_xmit_roundrobin(skb, dev);
+ case BOND_MODE_ACTIVEBACKUP:
+ return bond_xmit_activebackup(skb, dev);
+ case BOND_MODE_8023AD:
+ case BOND_MODE_XOR:
+ return bond_3ad_xor_xmit(skb, dev);
+ case BOND_MODE_BROADCAST:
+ return bond_xmit_broadcast(skb, dev);
+ case BOND_MODE_ALB:
+ return bond_alb_xmit(skb, dev);
+ case BOND_MODE_TLB:
+ return bond_tlb_xmit(skb, dev);
+ default:
+ /* Should never happen, mode already checked */
+ netdev_err(dev, "Unknown bonding mode %d\n", BOND_MODE(bond));
+ WARN_ON_ONCE(1);
+ bond_tx_drop(dev, skb);
+ return NETDEV_TX_OK;
+ }
+}
+
+static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct bonding *bond = netdev_priv(dev);
+ netdev_tx_t ret = NETDEV_TX_OK;
+
+ /* If we risk deadlock from transmitting this in the
+ * netpoll path, tell netpoll to queue the frame for later tx
+ */
+ if (unlikely(is_netpoll_tx_blocked(dev)))
+ return NETDEV_TX_BUSY;
+
+ rcu_read_lock();
+ if (bond_has_slaves(bond))
+ ret = __bond_start_xmit(skb, dev);
+ else
+ bond_tx_drop(dev, skb);
+ rcu_read_unlock();
+
+ return ret;
+}
+
+static int bond_ethtool_get_link_ksettings(struct net_device *bond_dev,
+ struct ethtool_link_ksettings *cmd)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ unsigned long speed = 0;
+ struct list_head *iter;
+ struct slave *slave;
+
+ cmd->base.duplex = DUPLEX_UNKNOWN;
+ cmd->base.port = PORT_OTHER;
+
+ /* Since bond_slave_can_tx returns false for all inactive or down slaves, we
+ * do not need to check mode. Though link speed might not represent
+ * the true receive or transmit bandwidth (not all modes are symmetric)
+ * this is an accurate maximum.
+ */
+ bond_for_each_slave(bond, slave, iter) {
+ if (bond_slave_can_tx(slave)) {
+ if (slave->speed != SPEED_UNKNOWN)
+ speed += slave->speed;
+ if (cmd->base.duplex == DUPLEX_UNKNOWN &&
+ slave->duplex != DUPLEX_UNKNOWN)
+ cmd->base.duplex = slave->duplex;
+ }
+ }
+ cmd->base.speed = speed ? : SPEED_UNKNOWN;
+
+ return 0;
+}
+
+static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
+ struct ethtool_drvinfo *drvinfo)
+{
+ strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
+ strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
+ snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), "%d",
+ BOND_ABI_VERSION);
+}
+
+static const struct ethtool_ops bond_ethtool_ops = {
+ .get_drvinfo = bond_ethtool_get_drvinfo,
+ .get_link = ethtool_op_get_link,
+ .get_link_ksettings = bond_ethtool_get_link_ksettings,
+};
+
+static const struct net_device_ops bond_netdev_ops = {
+ .ndo_init = bond_init,
+ .ndo_uninit = bond_uninit,
+ .ndo_open = bond_open,
+ .ndo_stop = bond_close,
+ .ndo_start_xmit = bond_start_xmit,
+ .ndo_select_queue = bond_select_queue,
+ .ndo_get_stats64 = bond_get_stats,
+ .ndo_do_ioctl = bond_do_ioctl,
+ .ndo_change_rx_flags = bond_change_rx_flags,
+ .ndo_set_rx_mode = bond_set_rx_mode,
+ .ndo_change_mtu = bond_change_mtu,
+ .ndo_set_mac_address = bond_set_mac_address,
+ .ndo_neigh_setup = bond_neigh_setup,
+ .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid,
+ .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid,
+ .ndo_get_lock_subclass = bond_get_nest_level,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_netpoll_setup = bond_netpoll_setup,
+ .ndo_netpoll_cleanup = bond_netpoll_cleanup,
+ .ndo_poll_controller = bond_poll_controller,
+#endif
+ .ndo_add_slave = bond_enslave,
+ .ndo_del_slave = bond_release,
+ .ndo_fix_features = bond_fix_features,
+ .ndo_features_check = passthru_features_check,
+};
+
+static const struct device_type bond_type = {
+ .name = "bond",
+};
+
+static void bond_destructor(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ if (bond->wq)
+ destroy_workqueue(bond->wq);
+}
+
+void bond_setup(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+
+ spin_lock_init(&bond->mode_lock);
+ spin_lock_init(&bond->stats_lock);
+ bond->params = bonding_defaults;
+
+ /* Initialize pointers */
+ bond->dev = bond_dev;
+
+ /* Initialize the device entry points */
+ ether_setup(bond_dev);
+ bond_dev->max_mtu = ETH_MAX_MTU;
+ bond_dev->netdev_ops = &bond_netdev_ops;
+ bond_dev->ethtool_ops = &bond_ethtool_ops;
+
+ bond_dev->needs_free_netdev = true;
+ bond_dev->priv_destructor = bond_destructor;
+
+ SET_NETDEV_DEVTYPE(bond_dev, &bond_type);
+
+ /* Initialize the device options */
+ bond_dev->flags |= IFF_MASTER;
+ bond_dev->priv_flags |= IFF_BONDING | IFF_UNICAST_FLT | IFF_NO_QUEUE;
+ bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
+
+ /* don't acquire bond device's netif_tx_lock when transmitting */
+ bond_dev->features |= NETIF_F_LLTX;
+
+ /* By default, we declare the bond to be fully
+ * VLAN hardware accelerated capable. Special
+ * care is taken in the various xmit functions
+ * when there are slaves that are not hw accel
+ * capable
+ */
+
+ /* Don't allow bond devices to change network namespaces. */
+ bond_dev->features |= NETIF_F_NETNS_LOCAL;
+
+ bond_dev->hw_features = BOND_VLAN_FEATURES |
+ NETIF_F_HW_VLAN_CTAG_TX |
+ NETIF_F_HW_VLAN_CTAG_RX |
+ NETIF_F_HW_VLAN_CTAG_FILTER;
+
+ bond_dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
+ bond_dev->features |= bond_dev->hw_features;
+}
+
+/* Destroy a bonding device.
+ * Must be under rtnl_lock when this function is called.
+ */
+static void bond_uninit(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct list_head *iter;
+ struct slave *slave;
+ struct bond_up_slave *arr;
+
+ bond_netpoll_cleanup(bond_dev);
+
+ /* Release the bonded slaves */
+ bond_for_each_slave(bond, slave, iter)
+ __bond_release_one(bond_dev, slave->dev, true, true);
+ netdev_info(bond_dev, "Released all slaves\n");
+
+ arr = rtnl_dereference(bond->slave_arr);
+ if (arr) {
+ RCU_INIT_POINTER(bond->slave_arr, NULL);
+ kfree_rcu(arr, rcu);
+ }
+
+ list_del(&bond->bond_list);
+
+ bond_debug_unregister(bond);
+}
+
+/*------------------------- Module initialization ---------------------------*/
+
+static int bond_check_params(struct bond_params *params)
+{
+ int arp_validate_value, fail_over_mac_value, primary_reselect_value, i;
+ struct bond_opt_value newval;
+ const struct bond_opt_value *valptr;
+ int arp_all_targets_value = 0;
+ u16 ad_actor_sys_prio = 0;
+ u16 ad_user_port_key = 0;
+ __be32 arp_target[BOND_MAX_ARP_TARGETS] = { 0 };
+ int arp_ip_count;
+ int bond_mode = BOND_MODE_ROUNDROBIN;
+ int xmit_hashtype = BOND_XMIT_POLICY_LAYER2;
+ int lacp_fast = 0;
+ int tlb_dynamic_lb;
+
+ /* Convert string parameters. */
+ if (mode) {
+ bond_opt_initstr(&newval, mode);
+ valptr = bond_opt_parse(bond_opt_get(BOND_OPT_MODE), &newval);
+ if (!valptr) {
+ pr_err("Error: Invalid bonding mode \"%s\"\n", mode);
+ return -EINVAL;
+ }
+ bond_mode = valptr->value;
+ }
+
+ if (xmit_hash_policy) {
+ if (bond_mode == BOND_MODE_ROUNDROBIN ||
+ bond_mode == BOND_MODE_ACTIVEBACKUP ||
+ bond_mode == BOND_MODE_BROADCAST) {
+ pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
+ bond_mode_name(bond_mode));
+ } else {
+ bond_opt_initstr(&newval, xmit_hash_policy);
+ valptr = bond_opt_parse(bond_opt_get(BOND_OPT_XMIT_HASH),
+ &newval);
+ if (!valptr) {
+ pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
+ xmit_hash_policy);
+ return -EINVAL;
+ }
+ xmit_hashtype = valptr->value;
+ }
+ }
+
+ if (lacp_rate) {
+ if (bond_mode != BOND_MODE_8023AD) {
+ pr_info("lacp_rate param is irrelevant in mode %s\n",
+ bond_mode_name(bond_mode));
+ } else {
+ bond_opt_initstr(&newval, lacp_rate);
+ valptr = bond_opt_parse(bond_opt_get(BOND_OPT_LACP_RATE),
+ &newval);
+ if (!valptr) {
+ pr_err("Error: Invalid lacp rate \"%s\"\n",
+ lacp_rate);
+ return -EINVAL;
+ }
+ lacp_fast = valptr->value;
+ }
+ }
+
+ if (ad_select) {
+ bond_opt_initstr(&newval, ad_select);
+ valptr = bond_opt_parse(bond_opt_get(BOND_OPT_AD_SELECT),
+ &newval);
+ if (!valptr) {
+ pr_err("Error: Invalid ad_select \"%s\"\n", ad_select);
+ return -EINVAL;
+ }
+ params->ad_select = valptr->value;
+ if (bond_mode != BOND_MODE_8023AD)
+ pr_warn("ad_select param only affects 802.3ad mode\n");
+ } else {
+ params->ad_select = BOND_AD_STABLE;
+ }
+
+ if (max_bonds < 0) {
+ pr_warn("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
+ max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
+ max_bonds = BOND_DEFAULT_MAX_BONDS;
+ }
+
+ if (miimon < 0) {
+ pr_warn("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to 0\n",
+ miimon, INT_MAX);
+ miimon = 0;
+ }
+
+ if (updelay < 0) {
+ pr_warn("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
+ updelay, INT_MAX);
+ updelay = 0;
+ }
+
+ if (downdelay < 0) {
+ pr_warn("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
+ downdelay, INT_MAX);
+ downdelay = 0;
+ }
+
+ if ((use_carrier != 0) && (use_carrier != 1)) {
+ pr_warn("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
+ use_carrier);
+ use_carrier = 1;
+ }
+
+ if (num_peer_notif < 0 || num_peer_notif > 255) {
+ pr_warn("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
+ num_peer_notif);
+ num_peer_notif = 1;
+ }
+
+ /* reset values for 802.3ad/TLB/ALB */
+ if (!bond_mode_uses_arp(bond_mode)) {
+ if (!miimon) {
+ pr_warn("Warning: miimon must be specified, otherwise bonding will not detect link failure, speed and duplex which are essential for 802.3ad operation\n");
+ pr_warn("Forcing miimon to 100msec\n");
+ miimon = BOND_DEFAULT_MIIMON;
+ }
+ }
+
+ if (tx_queues < 1 || tx_queues > 255) {
+ pr_warn("Warning: tx_queues (%d) should be between 1 and 255, resetting to %d\n",
+ tx_queues, BOND_DEFAULT_TX_QUEUES);
+ tx_queues = BOND_DEFAULT_TX_QUEUES;
+ }
+
+ if ((all_slaves_active != 0) && (all_slaves_active != 1)) {
+ pr_warn("Warning: all_slaves_active module parameter (%d), not of valid value (0/1), so it was set to 0\n",
+ all_slaves_active);
+ all_slaves_active = 0;
+ }
+
+ if (resend_igmp < 0 || resend_igmp > 255) {
+ pr_warn("Warning: resend_igmp (%d) should be between 0 and 255, resetting to %d\n",
+ resend_igmp, BOND_DEFAULT_RESEND_IGMP);
+ resend_igmp = BOND_DEFAULT_RESEND_IGMP;
+ }
+
+ bond_opt_initval(&newval, packets_per_slave);
+ if (!bond_opt_parse(bond_opt_get(BOND_OPT_PACKETS_PER_SLAVE), &newval)) {
+ pr_warn("Warning: packets_per_slave (%d) should be between 0 and %u resetting to 1\n",
+ packets_per_slave, USHRT_MAX);
+ packets_per_slave = 1;
+ }
+
+ if (bond_mode == BOND_MODE_ALB) {
+ pr_notice("In ALB mode you might experience client disconnections upon reconnection of a link if the bonding module updelay parameter (%d msec) is incompatible with the forwarding delay time of the switch\n",
+ updelay);
+ }
+
+ if (!miimon) {
+ if (updelay || downdelay) {
+ /* just warn the user the up/down delay will have
+ * no effect since miimon is zero...
+ */
+ pr_warn("Warning: miimon module parameter not set and updelay (%d) or downdelay (%d) module parameter is set; updelay and downdelay have no effect unless miimon is set\n",
+ updelay, downdelay);
+ }
+ } else {
+ /* don't allow arp monitoring */
+ if (arp_interval) {
+ pr_warn("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
+ miimon, arp_interval);
+ arp_interval = 0;
+ }
+
+ if ((updelay % miimon) != 0) {
+ pr_warn("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
+ updelay, miimon, (updelay / miimon) * miimon);
+ }
+
+ updelay /= miimon;
+
+ if ((downdelay % miimon) != 0) {
+ pr_warn("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
+ downdelay, miimon,
+ (downdelay / miimon) * miimon);
+ }
+
+ downdelay /= miimon;
+ }
+
+ if (arp_interval < 0) {
+ pr_warn("Warning: arp_interval module parameter (%d), not in range 0-%d, so it was reset to 0\n",
+ arp_interval, INT_MAX);
+ arp_interval = 0;
+ }
+
+ for (arp_ip_count = 0, i = 0;
+ (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[i]; i++) {
+ __be32 ip;
+
+ /* not a complete check, but good enough to catch mistakes */
+ if (!in4_pton(arp_ip_target[i], -1, (u8 *)&ip, -1, NULL) ||
+ !bond_is_ip_target_ok(ip)) {
+ pr_warn("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
+ arp_ip_target[i]);
+ arp_interval = 0;
+ } else {
+ if (bond_get_targets_ip(arp_target, ip) == -1)
+ arp_target[arp_ip_count++] = ip;
+ else
+ pr_warn("Warning: duplicate address %pI4 in arp_ip_target, skipping\n",
+ &ip);
+ }
+ }
+
+ if (arp_interval && !arp_ip_count) {
+ /* don't allow arping if no arp_ip_target given... */
+ pr_warn("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
+ arp_interval);
+ arp_interval = 0;
+ }
+
+ if (arp_validate) {
+ if (!arp_interval) {
+ pr_err("arp_validate requires arp_interval\n");
+ return -EINVAL;
+ }
+
+ bond_opt_initstr(&newval, arp_validate);
+ valptr = bond_opt_parse(bond_opt_get(BOND_OPT_ARP_VALIDATE),
+ &newval);
+ if (!valptr) {
+ pr_err("Error: invalid arp_validate \"%s\"\n",
+ arp_validate);
+ return -EINVAL;
+ }
+ arp_validate_value = valptr->value;
+ } else {
+ arp_validate_value = 0;
+ }
+
+ if (arp_all_targets) {
+ bond_opt_initstr(&newval, arp_all_targets);
+ valptr = bond_opt_parse(bond_opt_get(BOND_OPT_ARP_ALL_TARGETS),
+ &newval);
+ if (!valptr) {
+ pr_err("Error: invalid arp_all_targets_value \"%s\"\n",
+ arp_all_targets);
+ arp_all_targets_value = 0;
+ } else {
+ arp_all_targets_value = valptr->value;
+ }
+ }
+
+ if (miimon) {
+ pr_info("MII link monitoring set to %d ms\n", miimon);
+ } else if (arp_interval) {
+ valptr = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
+ arp_validate_value);
+ pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
+ arp_interval, valptr->string, arp_ip_count);
+
+ for (i = 0; i < arp_ip_count; i++)
+ pr_cont(" %s", arp_ip_target[i]);
+
+ pr_cont("\n");
+
+ } else if (max_bonds) {
+ /* miimon and arp_interval not set, we need one so things
+ * work as expected, see bonding.txt for details
+ */
+ pr_debug("Warning: either miimon or arp_interval and arp_ip_target module parameters must be specified, otherwise bonding will not detect link failures! see bonding.txt for details\n");
+ }
+
+ if (primary && !bond_mode_uses_primary(bond_mode)) {
+ /* currently, using a primary only makes sense
+ * in active backup, TLB or ALB modes
+ */
+ pr_warn("Warning: %s primary device specified but has no effect in %s mode\n",
+ primary, bond_mode_name(bond_mode));
+ primary = NULL;
+ }
+
+ if (primary && primary_reselect) {
+ bond_opt_initstr(&newval, primary_reselect);
+ valptr = bond_opt_parse(bond_opt_get(BOND_OPT_PRIMARY_RESELECT),
+ &newval);
+ if (!valptr) {
+ pr_err("Error: Invalid primary_reselect \"%s\"\n",
+ primary_reselect);
+ return -EINVAL;
+ }
+ primary_reselect_value = valptr->value;
+ } else {
+ primary_reselect_value = BOND_PRI_RESELECT_ALWAYS;
+ }
+
+ if (fail_over_mac) {
+ bond_opt_initstr(&newval, fail_over_mac);
+ valptr = bond_opt_parse(bond_opt_get(BOND_OPT_FAIL_OVER_MAC),
+ &newval);
+ if (!valptr) {
+ pr_err("Error: invalid fail_over_mac \"%s\"\n",
+ fail_over_mac);
+ return -EINVAL;
+ }
+ fail_over_mac_value = valptr->value;
+ if (bond_mode != BOND_MODE_ACTIVEBACKUP)
+ pr_warn("Warning: fail_over_mac only affects active-backup mode\n");
+ } else {
+ fail_over_mac_value = BOND_FOM_NONE;
+ }
+
+ bond_opt_initstr(&newval, "default");
+ valptr = bond_opt_parse(
+ bond_opt_get(BOND_OPT_AD_ACTOR_SYS_PRIO),
+ &newval);
+ if (!valptr) {
+ pr_err("Error: No ad_actor_sys_prio default value");
+ return -EINVAL;
+ }
+ ad_actor_sys_prio = valptr->value;
+
+ valptr = bond_opt_parse(bond_opt_get(BOND_OPT_AD_USER_PORT_KEY),
+ &newval);
+ if (!valptr) {
+ pr_err("Error: No ad_user_port_key default value");
+ return -EINVAL;
+ }
+ ad_user_port_key = valptr->value;
+
+ bond_opt_initstr(&newval, "default");
+ valptr = bond_opt_parse(bond_opt_get(BOND_OPT_TLB_DYNAMIC_LB), &newval);
+ if (!valptr) {
+ pr_err("Error: No tlb_dynamic_lb default value");
+ return -EINVAL;
+ }
+ tlb_dynamic_lb = valptr->value;
+
+ if (lp_interval == 0) {
+ pr_warn("Warning: ip_interval must be between 1 and %d, so it was reset to %d\n",
+ INT_MAX, BOND_ALB_DEFAULT_LP_INTERVAL);
+ lp_interval = BOND_ALB_DEFAULT_LP_INTERVAL;
+ }
+
+ /* fill params struct with the proper values */
+ params->mode = bond_mode;
+ params->xmit_policy = xmit_hashtype;
+ params->miimon = miimon;
+ params->num_peer_notif = num_peer_notif;
+ params->arp_interval = arp_interval;
+ params->arp_validate = arp_validate_value;
+ params->arp_all_targets = arp_all_targets_value;
+ params->updelay = updelay;
+ params->downdelay = downdelay;
+ params->use_carrier = use_carrier;
+ params->lacp_fast = lacp_fast;
+ params->primary[0] = 0;
+ params->primary_reselect = primary_reselect_value;
+ params->fail_over_mac = fail_over_mac_value;
+ params->tx_queues = tx_queues;
+ params->all_slaves_active = all_slaves_active;
+ params->resend_igmp = resend_igmp;
+ params->min_links = min_links;
+ params->lp_interval = lp_interval;
+ params->packets_per_slave = packets_per_slave;
+ params->tlb_dynamic_lb = tlb_dynamic_lb;
+ params->ad_actor_sys_prio = ad_actor_sys_prio;
+ eth_zero_addr(params->ad_actor_system);
+ params->ad_user_port_key = ad_user_port_key;
+ if (packets_per_slave > 0) {
+ params->reciprocal_packets_per_slave =
+ reciprocal_value(packets_per_slave);
+ } else {
+ /* reciprocal_packets_per_slave is unused if
+ * packets_per_slave is 0 or 1, just initialize it
+ */
+ params->reciprocal_packets_per_slave =
+ (struct reciprocal_value) { 0 };
+ }
+
+ if (primary) {
+ strncpy(params->primary, primary, IFNAMSIZ);
+ params->primary[IFNAMSIZ - 1] = 0;
+ }
+
+ memcpy(params->arp_targets, arp_target, sizeof(arp_target));
+
+ return 0;
+}
+
+/* Called from registration process */
+static int bond_init(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
+
+ netdev_dbg(bond_dev, "Begin bond_init\n");
+
+ bond->wq = alloc_ordered_workqueue(bond_dev->name, WQ_MEM_RECLAIM);
+ if (!bond->wq)
+ return -ENOMEM;
+
+ bond->nest_level = SINGLE_DEPTH_NESTING;
+ netdev_lockdep_set_classes(bond_dev);
+
+ list_add_tail(&bond->bond_list, &bn->dev_list);
+
+ bond_prepare_sysfs_group(bond);
+
+ bond_debug_register(bond);
+
+ /* Ensure valid dev_addr */
+ if (is_zero_ether_addr(bond_dev->dev_addr) &&
+ bond_dev->addr_assign_type == NET_ADDR_PERM)
+ eth_hw_addr_random(bond_dev);
+
+ return 0;
+}
+
+unsigned int bond_get_num_tx_queues(void)
+{
+ return tx_queues;
+}
+
+/* Create a new bond based on the specified name and bonding parameters.
+ * If name is NULL, obtain a suitable "bond%d" name for us.
+ * Caller must NOT hold rtnl_lock; we need to release it here before we
+ * set up our sysfs entries.
+ */
+int bond_create(struct net *net, const char *name)
+{
+ struct net_device *bond_dev;
+ struct bonding *bond;
+ struct alb_bond_info *bond_info;
+ int res;
+
+ rtnl_lock();
+
+ bond_dev = alloc_netdev_mq(sizeof(struct bonding),
+ name ? name : "bond%d", NET_NAME_UNKNOWN,
+ bond_setup, tx_queues);
+ if (!bond_dev) {
+ pr_err("%s: eek! can't alloc netdev!\n", name);
+ rtnl_unlock();
+ return -ENOMEM;
+ }
+
+ /*
+ * Initialize rx_hashtbl_used_head to RLB_NULL_INDEX.
+ * It is set to 0 by default which is wrong.
+ */
+ bond = netdev_priv(bond_dev);
+ bond_info = &(BOND_ALB_INFO(bond));
+ bond_info->rx_hashtbl_used_head = RLB_NULL_INDEX;
+
+ dev_net_set(bond_dev, net);
+ bond_dev->rtnl_link_ops = &bond_link_ops;
+
+ res = register_netdevice(bond_dev);
+
+ netif_carrier_off(bond_dev);
+
+ bond_work_init_all(bond);
+
+ rtnl_unlock();
+ if (res < 0)
+ free_netdev(bond_dev);
+ return res;
+}
+
+static int __net_init bond_net_init(struct net *net)
+{
+ struct bond_net *bn = net_generic(net, bond_net_id);
+
+ bn->net = net;
+ INIT_LIST_HEAD(&bn->dev_list);
+
+ bond_create_proc_dir(bn);
+ bond_create_sysfs(bn);
+
+ return 0;
+}
+
+static void __net_exit bond_net_exit(struct net *net)
+{
+ struct bond_net *bn = net_generic(net, bond_net_id);
+ struct bonding *bond, *tmp_bond;
+ LIST_HEAD(list);
+
+ bond_destroy_sysfs(bn);
+
+ /* Kill off any bonds created after unregistering bond rtnl ops */
+ rtnl_lock();
+ list_for_each_entry_safe(bond, tmp_bond, &bn->dev_list, bond_list)
+ unregister_netdevice_queue(bond->dev, &list);
+ unregister_netdevice_many(&list);
+ rtnl_unlock();
+
+ bond_destroy_proc_dir(bn);
+}
+
+static struct pernet_operations bond_net_ops = {
+ .init = bond_net_init,
+ .exit = bond_net_exit,
+ .id = &bond_net_id,
+ .size = sizeof(struct bond_net),
+};
+
+static int __init bonding_init(void)
+{
+ int i;
+ int res;
+
+ pr_info("%s", bond_version);
+
+ res = bond_check_params(&bonding_defaults);
+ if (res)
+ goto out;
+
+ res = register_pernet_subsys(&bond_net_ops);
+ if (res)
+ goto out;
+
+ res = bond_netlink_init();
+ if (res)
+ goto err_link;
+
+ bond_create_debugfs();
+
+ for (i = 0; i < max_bonds; i++) {
+ res = bond_create(&init_net, NULL);
+ if (res)
+ goto err;
+ }
+
+ register_netdevice_notifier(&bond_netdev_notifier);
+out:
+ return res;
+err:
+ bond_destroy_debugfs();
+ bond_netlink_fini();
+err_link:
+ unregister_pernet_subsys(&bond_net_ops);
+ goto out;
+
+}
+
+static void __exit bonding_exit(void)
+{
+ unregister_netdevice_notifier(&bond_netdev_notifier);
+
+ bond_destroy_debugfs();
+
+ bond_netlink_fini();
+ unregister_pernet_subsys(&bond_net_ops);
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ /* Make sure we don't have an imbalance on our netpoll blocking */
+ WARN_ON(atomic_read(&netpoll_block_tx));
+#endif
+}
+
+module_init(bonding_init);
+module_exit(bonding_exit);
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
+MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
diff --git a/drivers/net/bonding/bond_netlink.c b/drivers/net/bonding/bond_netlink.c
new file mode 100644
index 0000000..6b9ad86
--- /dev/null
+++ b/drivers/net/bonding/bond_netlink.c
@@ -0,0 +1,709 @@
+/*
+ * drivers/net/bond/bond_netlink.c - Netlink interface for bonding
+ * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
+ * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/if_link.h>
+#include <linux/if_ether.h>
+#include <net/netlink.h>
+#include <net/rtnetlink.h>
+#include <net/bonding.h>
+
+static size_t bond_get_slave_size(const struct net_device *bond_dev,
+ const struct net_device *slave_dev)
+{
+ return nla_total_size(sizeof(u8)) + /* IFLA_BOND_SLAVE_STATE */
+ nla_total_size(sizeof(u8)) + /* IFLA_BOND_SLAVE_MII_STATUS */
+ nla_total_size(sizeof(u32)) + /* IFLA_BOND_SLAVE_LINK_FAILURE_COUNT */
+ nla_total_size(MAX_ADDR_LEN) + /* IFLA_BOND_SLAVE_PERM_HWADDR */
+ nla_total_size(sizeof(u16)) + /* IFLA_BOND_SLAVE_QUEUE_ID */
+ nla_total_size(sizeof(u16)) + /* IFLA_BOND_SLAVE_AD_AGGREGATOR_ID */
+ nla_total_size(sizeof(u8)) + /* IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE */
+ nla_total_size(sizeof(u16)) + /* IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE */
+ 0;
+}
+
+static int bond_fill_slave_info(struct sk_buff *skb,
+ const struct net_device *bond_dev,
+ const struct net_device *slave_dev)
+{
+ struct slave *slave = bond_slave_get_rtnl(slave_dev);
+
+ if (nla_put_u8(skb, IFLA_BOND_SLAVE_STATE, bond_slave_state(slave)))
+ goto nla_put_failure;
+
+ if (nla_put_u8(skb, IFLA_BOND_SLAVE_MII_STATUS, slave->link))
+ goto nla_put_failure;
+
+ if (nla_put_u32(skb, IFLA_BOND_SLAVE_LINK_FAILURE_COUNT,
+ slave->link_failure_count))
+ goto nla_put_failure;
+
+ if (nla_put(skb, IFLA_BOND_SLAVE_PERM_HWADDR,
+ slave_dev->addr_len, slave->perm_hwaddr))
+ goto nla_put_failure;
+
+ if (nla_put_u16(skb, IFLA_BOND_SLAVE_QUEUE_ID, slave->queue_id))
+ goto nla_put_failure;
+
+ if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
+ const struct aggregator *agg;
+ const struct port *ad_port;
+
+ ad_port = &SLAVE_AD_INFO(slave)->port;
+ agg = SLAVE_AD_INFO(slave)->port.aggregator;
+ if (agg) {
+ if (nla_put_u16(skb, IFLA_BOND_SLAVE_AD_AGGREGATOR_ID,
+ agg->aggregator_identifier))
+ goto nla_put_failure;
+ if (nla_put_u8(skb,
+ IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE,
+ ad_port->actor_oper_port_state))
+ goto nla_put_failure;
+ if (nla_put_u16(skb,
+ IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE,
+ ad_port->partner_oper.port_state))
+ goto nla_put_failure;
+ }
+ }
+
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = {
+ [IFLA_BOND_MODE] = { .type = NLA_U8 },
+ [IFLA_BOND_ACTIVE_SLAVE] = { .type = NLA_U32 },
+ [IFLA_BOND_MIIMON] = { .type = NLA_U32 },
+ [IFLA_BOND_UPDELAY] = { .type = NLA_U32 },
+ [IFLA_BOND_DOWNDELAY] = { .type = NLA_U32 },
+ [IFLA_BOND_USE_CARRIER] = { .type = NLA_U8 },
+ [IFLA_BOND_ARP_INTERVAL] = { .type = NLA_U32 },
+ [IFLA_BOND_ARP_IP_TARGET] = { .type = NLA_NESTED },
+ [IFLA_BOND_ARP_VALIDATE] = { .type = NLA_U32 },
+ [IFLA_BOND_ARP_ALL_TARGETS] = { .type = NLA_U32 },
+ [IFLA_BOND_PRIMARY] = { .type = NLA_U32 },
+ [IFLA_BOND_PRIMARY_RESELECT] = { .type = NLA_U8 },
+ [IFLA_BOND_FAIL_OVER_MAC] = { .type = NLA_U8 },
+ [IFLA_BOND_XMIT_HASH_POLICY] = { .type = NLA_U8 },
+ [IFLA_BOND_RESEND_IGMP] = { .type = NLA_U32 },
+ [IFLA_BOND_NUM_PEER_NOTIF] = { .type = NLA_U8 },
+ [IFLA_BOND_ALL_SLAVES_ACTIVE] = { .type = NLA_U8 },
+ [IFLA_BOND_MIN_LINKS] = { .type = NLA_U32 },
+ [IFLA_BOND_LP_INTERVAL] = { .type = NLA_U32 },
+ [IFLA_BOND_PACKETS_PER_SLAVE] = { .type = NLA_U32 },
+ [IFLA_BOND_AD_LACP_RATE] = { .type = NLA_U8 },
+ [IFLA_BOND_AD_SELECT] = { .type = NLA_U8 },
+ [IFLA_BOND_AD_INFO] = { .type = NLA_NESTED },
+ [IFLA_BOND_AD_ACTOR_SYS_PRIO] = { .type = NLA_U16 },
+ [IFLA_BOND_AD_USER_PORT_KEY] = { .type = NLA_U16 },
+ [IFLA_BOND_AD_ACTOR_SYSTEM] = { .type = NLA_BINARY,
+ .len = ETH_ALEN },
+ [IFLA_BOND_TLB_DYNAMIC_LB] = { .type = NLA_U8 },
+};
+
+static const struct nla_policy bond_slave_policy[IFLA_BOND_SLAVE_MAX + 1] = {
+ [IFLA_BOND_SLAVE_QUEUE_ID] = { .type = NLA_U16 },
+};
+
+static int bond_validate(struct nlattr *tb[], struct nlattr *data[],
+ struct netlink_ext_ack *extack)
+{
+ if (tb[IFLA_ADDRESS]) {
+ if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
+ return -EINVAL;
+ if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
+ return -EADDRNOTAVAIL;
+ }
+ return 0;
+}
+
+static int bond_slave_changelink(struct net_device *bond_dev,
+ struct net_device *slave_dev,
+ struct nlattr *tb[], struct nlattr *data[],
+ struct netlink_ext_ack *extack)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct bond_opt_value newval;
+ int err;
+
+ if (!data)
+ return 0;
+
+ if (data[IFLA_BOND_SLAVE_QUEUE_ID]) {
+ u16 queue_id = nla_get_u16(data[IFLA_BOND_SLAVE_QUEUE_ID]);
+ char queue_id_str[IFNAMSIZ + 7];
+
+ /* queue_id option setting expects slave_name:queue_id */
+ snprintf(queue_id_str, sizeof(queue_id_str), "%s:%u\n",
+ slave_dev->name, queue_id);
+ bond_opt_initstr(&newval, queue_id_str);
+ err = __bond_opt_set(bond, BOND_OPT_QUEUE_ID, &newval);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int bond_changelink(struct net_device *bond_dev, struct nlattr *tb[],
+ struct nlattr *data[],
+ struct netlink_ext_ack *extack)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct bond_opt_value newval;
+ int miimon = 0;
+ int err;
+
+ if (!data)
+ return 0;
+
+ if (data[IFLA_BOND_MODE]) {
+ int mode = nla_get_u8(data[IFLA_BOND_MODE]);
+
+ bond_opt_initval(&newval, mode);
+ err = __bond_opt_set(bond, BOND_OPT_MODE, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_ACTIVE_SLAVE]) {
+ int ifindex = nla_get_u32(data[IFLA_BOND_ACTIVE_SLAVE]);
+ struct net_device *slave_dev;
+ char *active_slave = "";
+
+ if (ifindex != 0) {
+ slave_dev = __dev_get_by_index(dev_net(bond_dev),
+ ifindex);
+ if (!slave_dev)
+ return -ENODEV;
+ active_slave = slave_dev->name;
+ }
+ bond_opt_initstr(&newval, active_slave);
+ err = __bond_opt_set(bond, BOND_OPT_ACTIVE_SLAVE, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_MIIMON]) {
+ miimon = nla_get_u32(data[IFLA_BOND_MIIMON]);
+
+ bond_opt_initval(&newval, miimon);
+ err = __bond_opt_set(bond, BOND_OPT_MIIMON, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_UPDELAY]) {
+ int updelay = nla_get_u32(data[IFLA_BOND_UPDELAY]);
+
+ bond_opt_initval(&newval, updelay);
+ err = __bond_opt_set(bond, BOND_OPT_UPDELAY, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_DOWNDELAY]) {
+ int downdelay = nla_get_u32(data[IFLA_BOND_DOWNDELAY]);
+
+ bond_opt_initval(&newval, downdelay);
+ err = __bond_opt_set(bond, BOND_OPT_DOWNDELAY, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_USE_CARRIER]) {
+ int use_carrier = nla_get_u8(data[IFLA_BOND_USE_CARRIER]);
+
+ bond_opt_initval(&newval, use_carrier);
+ err = __bond_opt_set(bond, BOND_OPT_USE_CARRIER, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_ARP_INTERVAL]) {
+ int arp_interval = nla_get_u32(data[IFLA_BOND_ARP_INTERVAL]);
+
+ if (arp_interval && miimon) {
+ netdev_err(bond->dev, "ARP monitoring cannot be used with MII monitoring\n");
+ return -EINVAL;
+ }
+
+ bond_opt_initval(&newval, arp_interval);
+ err = __bond_opt_set(bond, BOND_OPT_ARP_INTERVAL, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_ARP_IP_TARGET]) {
+ struct nlattr *attr;
+ int i = 0, rem;
+
+ bond_option_arp_ip_targets_clear(bond);
+ nla_for_each_nested(attr, data[IFLA_BOND_ARP_IP_TARGET], rem) {
+ __be32 target;
+
+ if (nla_len(attr) < sizeof(target))
+ return -EINVAL;
+
+ target = nla_get_be32(attr);
+
+ bond_opt_initval(&newval, (__force u64)target);
+ err = __bond_opt_set(bond, BOND_OPT_ARP_TARGETS,
+ &newval);
+ if (err)
+ break;
+ i++;
+ }
+ if (i == 0 && bond->params.arp_interval)
+ netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_ARP_VALIDATE]) {
+ int arp_validate = nla_get_u32(data[IFLA_BOND_ARP_VALIDATE]);
+
+ if (arp_validate && miimon) {
+ netdev_err(bond->dev, "ARP validating cannot be used with MII monitoring\n");
+ return -EINVAL;
+ }
+
+ bond_opt_initval(&newval, arp_validate);
+ err = __bond_opt_set(bond, BOND_OPT_ARP_VALIDATE, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_ARP_ALL_TARGETS]) {
+ int arp_all_targets =
+ nla_get_u32(data[IFLA_BOND_ARP_ALL_TARGETS]);
+
+ bond_opt_initval(&newval, arp_all_targets);
+ err = __bond_opt_set(bond, BOND_OPT_ARP_ALL_TARGETS, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_PRIMARY]) {
+ int ifindex = nla_get_u32(data[IFLA_BOND_PRIMARY]);
+ struct net_device *dev;
+ char *primary = "";
+
+ dev = __dev_get_by_index(dev_net(bond_dev), ifindex);
+ if (dev)
+ primary = dev->name;
+
+ bond_opt_initstr(&newval, primary);
+ err = __bond_opt_set(bond, BOND_OPT_PRIMARY, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_PRIMARY_RESELECT]) {
+ int primary_reselect =
+ nla_get_u8(data[IFLA_BOND_PRIMARY_RESELECT]);
+
+ bond_opt_initval(&newval, primary_reselect);
+ err = __bond_opt_set(bond, BOND_OPT_PRIMARY_RESELECT, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_FAIL_OVER_MAC]) {
+ int fail_over_mac =
+ nla_get_u8(data[IFLA_BOND_FAIL_OVER_MAC]);
+
+ bond_opt_initval(&newval, fail_over_mac);
+ err = __bond_opt_set(bond, BOND_OPT_FAIL_OVER_MAC, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_XMIT_HASH_POLICY]) {
+ int xmit_hash_policy =
+ nla_get_u8(data[IFLA_BOND_XMIT_HASH_POLICY]);
+
+ bond_opt_initval(&newval, xmit_hash_policy);
+ err = __bond_opt_set(bond, BOND_OPT_XMIT_HASH, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_RESEND_IGMP]) {
+ int resend_igmp =
+ nla_get_u32(data[IFLA_BOND_RESEND_IGMP]);
+
+ bond_opt_initval(&newval, resend_igmp);
+ err = __bond_opt_set(bond, BOND_OPT_RESEND_IGMP, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_NUM_PEER_NOTIF]) {
+ int num_peer_notif =
+ nla_get_u8(data[IFLA_BOND_NUM_PEER_NOTIF]);
+
+ bond_opt_initval(&newval, num_peer_notif);
+ err = __bond_opt_set(bond, BOND_OPT_NUM_PEER_NOTIF, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_ALL_SLAVES_ACTIVE]) {
+ int all_slaves_active =
+ nla_get_u8(data[IFLA_BOND_ALL_SLAVES_ACTIVE]);
+
+ bond_opt_initval(&newval, all_slaves_active);
+ err = __bond_opt_set(bond, BOND_OPT_ALL_SLAVES_ACTIVE, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_MIN_LINKS]) {
+ int min_links =
+ nla_get_u32(data[IFLA_BOND_MIN_LINKS]);
+
+ bond_opt_initval(&newval, min_links);
+ err = __bond_opt_set(bond, BOND_OPT_MINLINKS, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_LP_INTERVAL]) {
+ int lp_interval =
+ nla_get_u32(data[IFLA_BOND_LP_INTERVAL]);
+
+ bond_opt_initval(&newval, lp_interval);
+ err = __bond_opt_set(bond, BOND_OPT_LP_INTERVAL, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_PACKETS_PER_SLAVE]) {
+ int packets_per_slave =
+ nla_get_u32(data[IFLA_BOND_PACKETS_PER_SLAVE]);
+
+ bond_opt_initval(&newval, packets_per_slave);
+ err = __bond_opt_set(bond, BOND_OPT_PACKETS_PER_SLAVE, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_AD_LACP_RATE]) {
+ int lacp_rate =
+ nla_get_u8(data[IFLA_BOND_AD_LACP_RATE]);
+
+ bond_opt_initval(&newval, lacp_rate);
+ err = __bond_opt_set(bond, BOND_OPT_LACP_RATE, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_AD_SELECT]) {
+ int ad_select =
+ nla_get_u8(data[IFLA_BOND_AD_SELECT]);
+
+ bond_opt_initval(&newval, ad_select);
+ err = __bond_opt_set(bond, BOND_OPT_AD_SELECT, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_AD_ACTOR_SYS_PRIO]) {
+ int actor_sys_prio =
+ nla_get_u16(data[IFLA_BOND_AD_ACTOR_SYS_PRIO]);
+
+ bond_opt_initval(&newval, actor_sys_prio);
+ err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYS_PRIO, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_AD_USER_PORT_KEY]) {
+ int port_key =
+ nla_get_u16(data[IFLA_BOND_AD_USER_PORT_KEY]);
+
+ bond_opt_initval(&newval, port_key);
+ err = __bond_opt_set(bond, BOND_OPT_AD_USER_PORT_KEY, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_AD_ACTOR_SYSTEM]) {
+ if (nla_len(data[IFLA_BOND_AD_ACTOR_SYSTEM]) != ETH_ALEN)
+ return -EINVAL;
+
+ bond_opt_initval(&newval,
+ nla_get_u64(data[IFLA_BOND_AD_ACTOR_SYSTEM]));
+ err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYSTEM, &newval);
+ if (err)
+ return err;
+ }
+ if (data[IFLA_BOND_TLB_DYNAMIC_LB]) {
+ int dynamic_lb = nla_get_u8(data[IFLA_BOND_TLB_DYNAMIC_LB]);
+
+ bond_opt_initval(&newval, dynamic_lb);
+ err = __bond_opt_set(bond, BOND_OPT_TLB_DYNAMIC_LB, &newval);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int bond_newlink(struct net *src_net, struct net_device *bond_dev,
+ struct nlattr *tb[], struct nlattr *data[],
+ struct netlink_ext_ack *extack)
+{
+ int err;
+
+ err = bond_changelink(bond_dev, tb, data, extack);
+ if (err < 0)
+ return err;
+
+ err = register_netdevice(bond_dev);
+
+ netif_carrier_off(bond_dev);
+ if (!err) {
+ struct bonding *bond = netdev_priv(bond_dev);
+
+ bond_work_init_all(bond);
+ }
+
+ return err;
+}
+
+static size_t bond_get_size(const struct net_device *bond_dev)
+{
+ return nla_total_size(sizeof(u8)) + /* IFLA_BOND_MODE */
+ nla_total_size(sizeof(u32)) + /* IFLA_BOND_ACTIVE_SLAVE */
+ nla_total_size(sizeof(u32)) + /* IFLA_BOND_MIIMON */
+ nla_total_size(sizeof(u32)) + /* IFLA_BOND_UPDELAY */
+ nla_total_size(sizeof(u32)) + /* IFLA_BOND_DOWNDELAY */
+ nla_total_size(sizeof(u8)) + /* IFLA_BOND_USE_CARRIER */
+ nla_total_size(sizeof(u32)) + /* IFLA_BOND_ARP_INTERVAL */
+ /* IFLA_BOND_ARP_IP_TARGET */
+ nla_total_size(sizeof(struct nlattr)) +
+ nla_total_size(sizeof(u32)) * BOND_MAX_ARP_TARGETS +
+ nla_total_size(sizeof(u32)) + /* IFLA_BOND_ARP_VALIDATE */
+ nla_total_size(sizeof(u32)) + /* IFLA_BOND_ARP_ALL_TARGETS */
+ nla_total_size(sizeof(u32)) + /* IFLA_BOND_PRIMARY */
+ nla_total_size(sizeof(u8)) + /* IFLA_BOND_PRIMARY_RESELECT */
+ nla_total_size(sizeof(u8)) + /* IFLA_BOND_FAIL_OVER_MAC */
+ nla_total_size(sizeof(u8)) + /* IFLA_BOND_XMIT_HASH_POLICY */
+ nla_total_size(sizeof(u32)) + /* IFLA_BOND_RESEND_IGMP */
+ nla_total_size(sizeof(u8)) + /* IFLA_BOND_NUM_PEER_NOTIF */
+ nla_total_size(sizeof(u8)) + /* IFLA_BOND_ALL_SLAVES_ACTIVE */
+ nla_total_size(sizeof(u32)) + /* IFLA_BOND_MIN_LINKS */
+ nla_total_size(sizeof(u32)) + /* IFLA_BOND_LP_INTERVAL */
+ nla_total_size(sizeof(u32)) + /* IFLA_BOND_PACKETS_PER_SLAVE */
+ nla_total_size(sizeof(u8)) + /* IFLA_BOND_AD_LACP_RATE */
+ nla_total_size(sizeof(u8)) + /* IFLA_BOND_AD_SELECT */
+ nla_total_size(sizeof(struct nlattr)) + /* IFLA_BOND_AD_INFO */
+ nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_AGGREGATOR */
+ nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_NUM_PORTS */
+ nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_ACTOR_KEY */
+ nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_PARTNER_KEY*/
+ nla_total_size(ETH_ALEN) + /* IFLA_BOND_AD_INFO_PARTNER_MAC*/
+ nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_ACTOR_SYS_PRIO */
+ nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_USER_PORT_KEY */
+ nla_total_size(ETH_ALEN) + /* IFLA_BOND_AD_ACTOR_SYSTEM */
+ nla_total_size(sizeof(u8)) + /* IFLA_BOND_TLB_DYNAMIC_LB */
+ 0;
+}
+
+static int bond_option_active_slave_get_ifindex(struct bonding *bond)
+{
+ const struct net_device *slave;
+ int ifindex;
+
+ rcu_read_lock();
+ slave = bond_option_active_slave_get_rcu(bond);
+ ifindex = slave ? slave->ifindex : 0;
+ rcu_read_unlock();
+ return ifindex;
+}
+
+static int bond_fill_info(struct sk_buff *skb,
+ const struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ unsigned int packets_per_slave;
+ int ifindex, i, targets_added;
+ struct nlattr *targets;
+ struct slave *primary;
+
+ if (nla_put_u8(skb, IFLA_BOND_MODE, BOND_MODE(bond)))
+ goto nla_put_failure;
+
+ ifindex = bond_option_active_slave_get_ifindex(bond);
+ if (ifindex && nla_put_u32(skb, IFLA_BOND_ACTIVE_SLAVE, ifindex))
+ goto nla_put_failure;
+
+ if (nla_put_u32(skb, IFLA_BOND_MIIMON, bond->params.miimon))
+ goto nla_put_failure;
+
+ if (nla_put_u32(skb, IFLA_BOND_UPDELAY,
+ bond->params.updelay * bond->params.miimon))
+ goto nla_put_failure;
+
+ if (nla_put_u32(skb, IFLA_BOND_DOWNDELAY,
+ bond->params.downdelay * bond->params.miimon))
+ goto nla_put_failure;
+
+ if (nla_put_u8(skb, IFLA_BOND_USE_CARRIER, bond->params.use_carrier))
+ goto nla_put_failure;
+
+ if (nla_put_u32(skb, IFLA_BOND_ARP_INTERVAL, bond->params.arp_interval))
+ goto nla_put_failure;
+
+ targets = nla_nest_start(skb, IFLA_BOND_ARP_IP_TARGET);
+ if (!targets)
+ goto nla_put_failure;
+
+ targets_added = 0;
+ for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
+ if (bond->params.arp_targets[i]) {
+ if (nla_put_be32(skb, i, bond->params.arp_targets[i]))
+ goto nla_put_failure;
+ targets_added = 1;
+ }
+ }
+
+ if (targets_added)
+ nla_nest_end(skb, targets);
+ else
+ nla_nest_cancel(skb, targets);
+
+ if (nla_put_u32(skb, IFLA_BOND_ARP_VALIDATE, bond->params.arp_validate))
+ goto nla_put_failure;
+
+ if (nla_put_u32(skb, IFLA_BOND_ARP_ALL_TARGETS,
+ bond->params.arp_all_targets))
+ goto nla_put_failure;
+
+ primary = rtnl_dereference(bond->primary_slave);
+ if (primary &&
+ nla_put_u32(skb, IFLA_BOND_PRIMARY, primary->dev->ifindex))
+ goto nla_put_failure;
+
+ if (nla_put_u8(skb, IFLA_BOND_PRIMARY_RESELECT,
+ bond->params.primary_reselect))
+ goto nla_put_failure;
+
+ if (nla_put_u8(skb, IFLA_BOND_FAIL_OVER_MAC,
+ bond->params.fail_over_mac))
+ goto nla_put_failure;
+
+ if (nla_put_u8(skb, IFLA_BOND_XMIT_HASH_POLICY,
+ bond->params.xmit_policy))
+ goto nla_put_failure;
+
+ if (nla_put_u32(skb, IFLA_BOND_RESEND_IGMP,
+ bond->params.resend_igmp))
+ goto nla_put_failure;
+
+ if (nla_put_u8(skb, IFLA_BOND_NUM_PEER_NOTIF,
+ bond->params.num_peer_notif))
+ goto nla_put_failure;
+
+ if (nla_put_u8(skb, IFLA_BOND_ALL_SLAVES_ACTIVE,
+ bond->params.all_slaves_active))
+ goto nla_put_failure;
+
+ if (nla_put_u32(skb, IFLA_BOND_MIN_LINKS,
+ bond->params.min_links))
+ goto nla_put_failure;
+
+ if (nla_put_u32(skb, IFLA_BOND_LP_INTERVAL,
+ bond->params.lp_interval))
+ goto nla_put_failure;
+
+ packets_per_slave = bond->params.packets_per_slave;
+ if (nla_put_u32(skb, IFLA_BOND_PACKETS_PER_SLAVE,
+ packets_per_slave))
+ goto nla_put_failure;
+
+ if (nla_put_u8(skb, IFLA_BOND_AD_LACP_RATE,
+ bond->params.lacp_fast))
+ goto nla_put_failure;
+
+ if (nla_put_u8(skb, IFLA_BOND_AD_SELECT,
+ bond->params.ad_select))
+ goto nla_put_failure;
+
+ if (nla_put_u8(skb, IFLA_BOND_TLB_DYNAMIC_LB,
+ bond->params.tlb_dynamic_lb))
+ goto nla_put_failure;
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+ struct ad_info info;
+
+ if (capable(CAP_NET_ADMIN)) {
+ if (nla_put_u16(skb, IFLA_BOND_AD_ACTOR_SYS_PRIO,
+ bond->params.ad_actor_sys_prio))
+ goto nla_put_failure;
+
+ if (nla_put_u16(skb, IFLA_BOND_AD_USER_PORT_KEY,
+ bond->params.ad_user_port_key))
+ goto nla_put_failure;
+
+ if (nla_put(skb, IFLA_BOND_AD_ACTOR_SYSTEM,
+ ETH_ALEN, &bond->params.ad_actor_system))
+ goto nla_put_failure;
+ }
+ if (!bond_3ad_get_active_agg_info(bond, &info)) {
+ struct nlattr *nest;
+
+ nest = nla_nest_start(skb, IFLA_BOND_AD_INFO);
+ if (!nest)
+ goto nla_put_failure;
+
+ if (nla_put_u16(skb, IFLA_BOND_AD_INFO_AGGREGATOR,
+ info.aggregator_id))
+ goto nla_put_failure;
+ if (nla_put_u16(skb, IFLA_BOND_AD_INFO_NUM_PORTS,
+ info.ports))
+ goto nla_put_failure;
+ if (nla_put_u16(skb, IFLA_BOND_AD_INFO_ACTOR_KEY,
+ info.actor_key))
+ goto nla_put_failure;
+ if (nla_put_u16(skb, IFLA_BOND_AD_INFO_PARTNER_KEY,
+ info.partner_key))
+ goto nla_put_failure;
+ if (nla_put(skb, IFLA_BOND_AD_INFO_PARTNER_MAC,
+ sizeof(info.partner_system),
+ &info.partner_system))
+ goto nla_put_failure;
+
+ nla_nest_end(skb, nest);
+ }
+ }
+
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+struct rtnl_link_ops bond_link_ops __read_mostly = {
+ .kind = "bond",
+ .priv_size = sizeof(struct bonding),
+ .setup = bond_setup,
+ .maxtype = IFLA_BOND_MAX,
+ .policy = bond_policy,
+ .validate = bond_validate,
+ .newlink = bond_newlink,
+ .changelink = bond_changelink,
+ .get_size = bond_get_size,
+ .fill_info = bond_fill_info,
+ .get_num_tx_queues = bond_get_num_tx_queues,
+ .get_num_rx_queues = bond_get_num_tx_queues, /* Use the same number
+ as for TX queues */
+ .slave_maxtype = IFLA_BOND_SLAVE_MAX,
+ .slave_policy = bond_slave_policy,
+ .slave_changelink = bond_slave_changelink,
+ .get_slave_size = bond_get_slave_size,
+ .fill_slave_info = bond_fill_slave_info,
+};
+
+int __init bond_netlink_init(void)
+{
+ return rtnl_link_register(&bond_link_ops);
+}
+
+void bond_netlink_fini(void)
+{
+ rtnl_link_unregister(&bond_link_ops);
+}
+
+MODULE_ALIAS_RTNL_LINK("bond");
diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c
new file mode 100644
index 0000000..4d5d01c
--- /dev/null
+++ b/drivers/net/bonding/bond_options.c
@@ -0,0 +1,1471 @@
+/*
+ * drivers/net/bond/bond_options.c - bonding options
+ * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
+ * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/errno.h>
+#include <linux/if.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+#include <linux/rcupdate.h>
+#include <linux/ctype.h>
+#include <linux/inet.h>
+#include <linux/sched/signal.h>
+
+#include <net/bonding.h>
+
+static int bond_option_active_slave_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_miimon_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_updelay_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_downdelay_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_use_carrier_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_arp_interval_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
+static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
+static int bond_option_arp_ip_targets_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_arp_validate_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_arp_all_targets_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_primary_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_primary_reselect_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_fail_over_mac_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_xmit_hash_policy_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_resend_igmp_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_num_peer_notif_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_all_slaves_active_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_min_links_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_lp_interval_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_pps_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_lacp_rate_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_ad_select_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_queue_id_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_mode_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_slaves_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_ad_actor_system_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+static int bond_option_ad_user_port_key_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
+
+
+static const struct bond_opt_value bond_mode_tbl[] = {
+ { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
+ { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
+ { "balance-xor", BOND_MODE_XOR, 0},
+ { "broadcast", BOND_MODE_BROADCAST, 0},
+ { "802.3ad", BOND_MODE_8023AD, 0},
+ { "balance-tlb", BOND_MODE_TLB, 0},
+ { "balance-alb", BOND_MODE_ALB, 0},
+ { NULL, -1, 0},
+};
+
+static const struct bond_opt_value bond_pps_tbl[] = {
+ { "default", 1, BOND_VALFLAG_DEFAULT},
+ { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
+ { NULL, -1, 0},
+};
+
+static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
+ { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
+ { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
+ { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
+ { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
+ { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
+ { NULL, -1, 0},
+};
+
+static const struct bond_opt_value bond_arp_validate_tbl[] = {
+ { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
+ { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
+ { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
+ { "all", BOND_ARP_VALIDATE_ALL, 0},
+ { "filter", BOND_ARP_FILTER, 0},
+ { "filter_active", BOND_ARP_FILTER_ACTIVE, 0},
+ { "filter_backup", BOND_ARP_FILTER_BACKUP, 0},
+ { NULL, -1, 0},
+};
+
+static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
+ { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
+ { "all", BOND_ARP_TARGETS_ALL, 0},
+ { NULL, -1, 0},
+};
+
+static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
+ { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
+ { "active", BOND_FOM_ACTIVE, 0},
+ { "follow", BOND_FOM_FOLLOW, 0},
+ { NULL, -1, 0},
+};
+
+static const struct bond_opt_value bond_intmax_tbl[] = {
+ { "off", 0, BOND_VALFLAG_DEFAULT},
+ { "maxval", INT_MAX, BOND_VALFLAG_MAX},
+ { NULL, -1, 0}
+};
+
+static const struct bond_opt_value bond_lacp_rate_tbl[] = {
+ { "slow", AD_LACP_SLOW, 0},
+ { "fast", AD_LACP_FAST, 0},
+ { NULL, -1, 0},
+};
+
+static const struct bond_opt_value bond_ad_select_tbl[] = {
+ { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
+ { "bandwidth", BOND_AD_BANDWIDTH, 0},
+ { "count", BOND_AD_COUNT, 0},
+ { NULL, -1, 0},
+};
+
+static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
+ { "off", 0, 0},
+ { "maxval", 255, BOND_VALFLAG_MAX},
+ { "default", 1, BOND_VALFLAG_DEFAULT},
+ { NULL, -1, 0}
+};
+
+static const struct bond_opt_value bond_primary_reselect_tbl[] = {
+ { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
+ { "better", BOND_PRI_RESELECT_BETTER, 0},
+ { "failure", BOND_PRI_RESELECT_FAILURE, 0},
+ { NULL, -1},
+};
+
+static const struct bond_opt_value bond_use_carrier_tbl[] = {
+ { "off", 0, 0},
+ { "on", 1, BOND_VALFLAG_DEFAULT},
+ { NULL, -1, 0}
+};
+
+static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
+ { "off", 0, BOND_VALFLAG_DEFAULT},
+ { "on", 1, 0},
+ { NULL, -1, 0}
+};
+
+static const struct bond_opt_value bond_resend_igmp_tbl[] = {
+ { "off", 0, 0},
+ { "maxval", 255, BOND_VALFLAG_MAX},
+ { "default", 1, BOND_VALFLAG_DEFAULT},
+ { NULL, -1, 0}
+};
+
+static const struct bond_opt_value bond_lp_interval_tbl[] = {
+ { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
+ { "maxval", INT_MAX, BOND_VALFLAG_MAX},
+ { NULL, -1, 0},
+};
+
+static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
+ { "off", 0, 0},
+ { "on", 1, BOND_VALFLAG_DEFAULT},
+ { NULL, -1, 0}
+};
+
+static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
+ { "minval", 1, BOND_VALFLAG_MIN},
+ { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
+ { NULL, -1, 0},
+};
+
+static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
+ { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
+ { "maxval", 1023, BOND_VALFLAG_MAX},
+ { NULL, -1, 0},
+};
+
+static const struct bond_option bond_opts[BOND_OPT_LAST] = {
+ [BOND_OPT_MODE] = {
+ .id = BOND_OPT_MODE,
+ .name = "mode",
+ .desc = "bond device mode",
+ .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
+ .values = bond_mode_tbl,
+ .set = bond_option_mode_set
+ },
+ [BOND_OPT_PACKETS_PER_SLAVE] = {
+ .id = BOND_OPT_PACKETS_PER_SLAVE,
+ .name = "packets_per_slave",
+ .desc = "Packets to send per slave in RR mode",
+ .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
+ .values = bond_pps_tbl,
+ .set = bond_option_pps_set
+ },
+ [BOND_OPT_XMIT_HASH] = {
+ .id = BOND_OPT_XMIT_HASH,
+ .name = "xmit_hash_policy",
+ .desc = "balance-xor, 802.3ad, and tlb hashing method",
+ .values = bond_xmit_hashtype_tbl,
+ .set = bond_option_xmit_hash_policy_set
+ },
+ [BOND_OPT_ARP_VALIDATE] = {
+ .id = BOND_OPT_ARP_VALIDATE,
+ .name = "arp_validate",
+ .desc = "validate src/dst of ARP probes",
+ .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
+ BIT(BOND_MODE_ALB),
+ .values = bond_arp_validate_tbl,
+ .set = bond_option_arp_validate_set
+ },
+ [BOND_OPT_ARP_ALL_TARGETS] = {
+ .id = BOND_OPT_ARP_ALL_TARGETS,
+ .name = "arp_all_targets",
+ .desc = "fail on any/all arp targets timeout",
+ .values = bond_arp_all_targets_tbl,
+ .set = bond_option_arp_all_targets_set
+ },
+ [BOND_OPT_FAIL_OVER_MAC] = {
+ .id = BOND_OPT_FAIL_OVER_MAC,
+ .name = "fail_over_mac",
+ .desc = "For active-backup, do not set all slaves to the same MAC",
+ .flags = BOND_OPTFLAG_NOSLAVES,
+ .values = bond_fail_over_mac_tbl,
+ .set = bond_option_fail_over_mac_set
+ },
+ [BOND_OPT_ARP_INTERVAL] = {
+ .id = BOND_OPT_ARP_INTERVAL,
+ .name = "arp_interval",
+ .desc = "arp interval in milliseconds",
+ .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
+ BIT(BOND_MODE_ALB),
+ .values = bond_intmax_tbl,
+ .set = bond_option_arp_interval_set
+ },
+ [BOND_OPT_ARP_TARGETS] = {
+ .id = BOND_OPT_ARP_TARGETS,
+ .name = "arp_ip_target",
+ .desc = "arp targets in n.n.n.n form",
+ .flags = BOND_OPTFLAG_RAWVAL,
+ .set = bond_option_arp_ip_targets_set
+ },
+ [BOND_OPT_DOWNDELAY] = {
+ .id = BOND_OPT_DOWNDELAY,
+ .name = "downdelay",
+ .desc = "Delay before considering link down, in milliseconds",
+ .values = bond_intmax_tbl,
+ .set = bond_option_downdelay_set
+ },
+ [BOND_OPT_UPDELAY] = {
+ .id = BOND_OPT_UPDELAY,
+ .name = "updelay",
+ .desc = "Delay before considering link up, in milliseconds",
+ .values = bond_intmax_tbl,
+ .set = bond_option_updelay_set
+ },
+ [BOND_OPT_LACP_RATE] = {
+ .id = BOND_OPT_LACP_RATE,
+ .name = "lacp_rate",
+ .desc = "LACPDU tx rate to request from 802.3ad partner",
+ .flags = BOND_OPTFLAG_IFDOWN,
+ .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
+ .values = bond_lacp_rate_tbl,
+ .set = bond_option_lacp_rate_set
+ },
+ [BOND_OPT_MINLINKS] = {
+ .id = BOND_OPT_MINLINKS,
+ .name = "min_links",
+ .desc = "Minimum number of available links before turning on carrier",
+ .values = bond_intmax_tbl,
+ .set = bond_option_min_links_set
+ },
+ [BOND_OPT_AD_SELECT] = {
+ .id = BOND_OPT_AD_SELECT,
+ .name = "ad_select",
+ .desc = "803.ad aggregation selection logic",
+ .flags = BOND_OPTFLAG_IFDOWN,
+ .values = bond_ad_select_tbl,
+ .set = bond_option_ad_select_set
+ },
+ [BOND_OPT_NUM_PEER_NOTIF] = {
+ .id = BOND_OPT_NUM_PEER_NOTIF,
+ .name = "num_unsol_na",
+ .desc = "Number of peer notifications to send on failover event",
+ .values = bond_num_peer_notif_tbl,
+ .set = bond_option_num_peer_notif_set
+ },
+ [BOND_OPT_MIIMON] = {
+ .id = BOND_OPT_MIIMON,
+ .name = "miimon",
+ .desc = "Link check interval in milliseconds",
+ .values = bond_intmax_tbl,
+ .set = bond_option_miimon_set
+ },
+ [BOND_OPT_PRIMARY] = {
+ .id = BOND_OPT_PRIMARY,
+ .name = "primary",
+ .desc = "Primary network device to use",
+ .flags = BOND_OPTFLAG_RAWVAL,
+ .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
+ BIT(BOND_MODE_TLB) |
+ BIT(BOND_MODE_ALB)),
+ .set = bond_option_primary_set
+ },
+ [BOND_OPT_PRIMARY_RESELECT] = {
+ .id = BOND_OPT_PRIMARY_RESELECT,
+ .name = "primary_reselect",
+ .desc = "Reselect primary slave once it comes up",
+ .values = bond_primary_reselect_tbl,
+ .set = bond_option_primary_reselect_set
+ },
+ [BOND_OPT_USE_CARRIER] = {
+ .id = BOND_OPT_USE_CARRIER,
+ .name = "use_carrier",
+ .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
+ .values = bond_use_carrier_tbl,
+ .set = bond_option_use_carrier_set
+ },
+ [BOND_OPT_ACTIVE_SLAVE] = {
+ .id = BOND_OPT_ACTIVE_SLAVE,
+ .name = "active_slave",
+ .desc = "Currently active slave",
+ .flags = BOND_OPTFLAG_RAWVAL,
+ .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
+ BIT(BOND_MODE_TLB) |
+ BIT(BOND_MODE_ALB)),
+ .set = bond_option_active_slave_set
+ },
+ [BOND_OPT_QUEUE_ID] = {
+ .id = BOND_OPT_QUEUE_ID,
+ .name = "queue_id",
+ .desc = "Set queue id of a slave",
+ .flags = BOND_OPTFLAG_RAWVAL,
+ .set = bond_option_queue_id_set
+ },
+ [BOND_OPT_ALL_SLAVES_ACTIVE] = {
+ .id = BOND_OPT_ALL_SLAVES_ACTIVE,
+ .name = "all_slaves_active",
+ .desc = "Keep all frames received on an interface by setting active flag for all slaves",
+ .values = bond_all_slaves_active_tbl,
+ .set = bond_option_all_slaves_active_set
+ },
+ [BOND_OPT_RESEND_IGMP] = {
+ .id = BOND_OPT_RESEND_IGMP,
+ .name = "resend_igmp",
+ .desc = "Number of IGMP membership reports to send on link failure",
+ .values = bond_resend_igmp_tbl,
+ .set = bond_option_resend_igmp_set
+ },
+ [BOND_OPT_LP_INTERVAL] = {
+ .id = BOND_OPT_LP_INTERVAL,
+ .name = "lp_interval",
+ .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
+ .values = bond_lp_interval_tbl,
+ .set = bond_option_lp_interval_set
+ },
+ [BOND_OPT_SLAVES] = {
+ .id = BOND_OPT_SLAVES,
+ .name = "slaves",
+ .desc = "Slave membership management",
+ .flags = BOND_OPTFLAG_RAWVAL,
+ .set = bond_option_slaves_set
+ },
+ [BOND_OPT_TLB_DYNAMIC_LB] = {
+ .id = BOND_OPT_TLB_DYNAMIC_LB,
+ .name = "tlb_dynamic_lb",
+ .desc = "Enable dynamic flow shuffling",
+ .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
+ .values = bond_tlb_dynamic_lb_tbl,
+ .flags = BOND_OPTFLAG_IFDOWN,
+ .set = bond_option_tlb_dynamic_lb_set,
+ },
+ [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
+ .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
+ .name = "ad_actor_sys_prio",
+ .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
+ .values = bond_ad_actor_sys_prio_tbl,
+ .set = bond_option_ad_actor_sys_prio_set,
+ },
+ [BOND_OPT_AD_ACTOR_SYSTEM] = {
+ .id = BOND_OPT_AD_ACTOR_SYSTEM,
+ .name = "ad_actor_system",
+ .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
+ .flags = BOND_OPTFLAG_RAWVAL,
+ .set = bond_option_ad_actor_system_set,
+ },
+ [BOND_OPT_AD_USER_PORT_KEY] = {
+ .id = BOND_OPT_AD_USER_PORT_KEY,
+ .name = "ad_user_port_key",
+ .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
+ .flags = BOND_OPTFLAG_IFDOWN,
+ .values = bond_ad_user_port_key_tbl,
+ .set = bond_option_ad_user_port_key_set,
+ },
+ [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
+ .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
+ .name = "num_grat_arp",
+ .desc = "Number of peer notifications to send on failover event",
+ .values = bond_num_peer_notif_tbl,
+ .set = bond_option_num_peer_notif_set
+ }
+};
+
+/* Searches for an option by name */
+const struct bond_option *bond_opt_get_by_name(const char *name)
+{
+ const struct bond_option *opt;
+ int option;
+
+ for (option = 0; option < BOND_OPT_LAST; option++) {
+ opt = bond_opt_get(option);
+ if (opt && !strcmp(opt->name, name))
+ return opt;
+ }
+
+ return NULL;
+}
+
+/* Searches for a value in opt's values[] table */
+const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
+{
+ const struct bond_option *opt;
+ int i;
+
+ opt = bond_opt_get(option);
+ if (WARN_ON(!opt))
+ return NULL;
+ for (i = 0; opt->values && opt->values[i].string; i++)
+ if (opt->values[i].value == val)
+ return &opt->values[i];
+
+ return NULL;
+}
+
+/* Searches for a value in opt's values[] table which matches the flagmask */
+static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
+ u32 flagmask)
+{
+ int i;
+
+ for (i = 0; opt->values && opt->values[i].string; i++)
+ if (opt->values[i].flags & flagmask)
+ return &opt->values[i];
+
+ return NULL;
+}
+
+/* If maxval is missing then there's no range to check. In case minval is
+ * missing then it's considered to be 0.
+ */
+static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
+{
+ const struct bond_opt_value *minval, *maxval;
+
+ minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
+ maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
+ if (!maxval || (minval && val < minval->value) || val > maxval->value)
+ return false;
+
+ return true;
+}
+
+/**
+ * bond_opt_parse - parse option value
+ * @opt: the option to parse against
+ * @val: value to parse
+ *
+ * This function tries to extract the value from @val and check if it's
+ * a possible match for the option and returns NULL if a match isn't found,
+ * or the struct_opt_value that matched. It also strips the new line from
+ * @val->string if it's present.
+ */
+const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
+ struct bond_opt_value *val)
+{
+ char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
+ const struct bond_opt_value *tbl;
+ const struct bond_opt_value *ret = NULL;
+ bool checkval;
+ int i, rv;
+
+ /* No parsing if the option wants a raw val */
+ if (opt->flags & BOND_OPTFLAG_RAWVAL)
+ return val;
+
+ tbl = opt->values;
+ if (!tbl)
+ goto out;
+
+ /* ULLONG_MAX is used to bypass string processing */
+ checkval = val->value != ULLONG_MAX;
+ if (!checkval) {
+ if (!val->string)
+ goto out;
+ p = strchr(val->string, '\n');
+ if (p)
+ *p = '\0';
+ for (p = val->string; *p; p++)
+ if (!(isdigit(*p) || isspace(*p)))
+ break;
+ /* The following code extracts the string to match or the value
+ * and sets checkval appropriately
+ */
+ if (*p) {
+ rv = sscanf(val->string, "%32s", valstr);
+ } else {
+ rv = sscanf(val->string, "%llu", &val->value);
+ checkval = true;
+ }
+ if (!rv)
+ goto out;
+ }
+
+ for (i = 0; tbl[i].string; i++) {
+ /* Check for exact match */
+ if (checkval) {
+ if (val->value == tbl[i].value)
+ ret = &tbl[i];
+ } else {
+ if (!strcmp(valstr, "default") &&
+ (tbl[i].flags & BOND_VALFLAG_DEFAULT))
+ ret = &tbl[i];
+
+ if (!strcmp(valstr, tbl[i].string))
+ ret = &tbl[i];
+ }
+ /* Found an exact match */
+ if (ret)
+ goto out;
+ }
+ /* Possible range match */
+ if (checkval && bond_opt_check_range(opt, val->value))
+ ret = val;
+out:
+ return ret;
+}
+
+/* Check opt's dependencies against bond mode and currently set options */
+static int bond_opt_check_deps(struct bonding *bond,
+ const struct bond_option *opt)
+{
+ struct bond_params *params = &bond->params;
+
+ if (test_bit(params->mode, &opt->unsuppmodes))
+ return -EACCES;
+ if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
+ return -ENOTEMPTY;
+ if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
+ return -EBUSY;
+
+ return 0;
+}
+
+static void bond_opt_dep_print(struct bonding *bond,
+ const struct bond_option *opt)
+{
+ const struct bond_opt_value *modeval;
+ struct bond_params *params;
+
+ params = &bond->params;
+ modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
+ if (test_bit(params->mode, &opt->unsuppmodes))
+ netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
+ opt->name, modeval->string, modeval->value);
+}
+
+static void bond_opt_error_interpret(struct bonding *bond,
+ const struct bond_option *opt,
+ int error, const struct bond_opt_value *val)
+{
+ const struct bond_opt_value *minval, *maxval;
+ char *p;
+
+ switch (error) {
+ case -EINVAL:
+ if (val) {
+ if (val->string) {
+ /* sometimes RAWVAL opts may have new lines */
+ p = strchr(val->string, '\n');
+ if (p)
+ *p = '\0';
+ netdev_err(bond->dev, "option %s: invalid value (%s)\n",
+ opt->name, val->string);
+ } else {
+ netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
+ opt->name, val->value);
+ }
+ }
+ minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
+ maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
+ if (!maxval)
+ break;
+ netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
+ opt->name, minval ? minval->value : 0, maxval->value);
+ break;
+ case -EACCES:
+ bond_opt_dep_print(bond, opt);
+ break;
+ case -ENOTEMPTY:
+ netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
+ opt->name);
+ break;
+ case -EBUSY:
+ netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
+ opt->name);
+ break;
+ default:
+ break;
+ }
+}
+
+/**
+ * __bond_opt_set - set a bonding option
+ * @bond: target bond device
+ * @option: option to set
+ * @val: value to set it to
+ *
+ * This function is used to change the bond's option value, it can be
+ * used for both enabling/changing an option and for disabling it. RTNL lock
+ * must be obtained before calling this function.
+ */
+int __bond_opt_set(struct bonding *bond,
+ unsigned int option, struct bond_opt_value *val)
+{
+ const struct bond_opt_value *retval = NULL;
+ const struct bond_option *opt;
+ int ret = -ENOENT;
+
+ ASSERT_RTNL();
+
+ opt = bond_opt_get(option);
+ if (WARN_ON(!val) || WARN_ON(!opt))
+ goto out;
+ ret = bond_opt_check_deps(bond, opt);
+ if (ret)
+ goto out;
+ retval = bond_opt_parse(opt, val);
+ if (!retval) {
+ ret = -EINVAL;
+ goto out;
+ }
+ ret = opt->set(bond, retval);
+out:
+ if (ret)
+ bond_opt_error_interpret(bond, opt, ret, val);
+
+ return ret;
+}
+/**
+ * __bond_opt_set_notify - set a bonding option
+ * @bond: target bond device
+ * @option: option to set
+ * @val: value to set it to
+ *
+ * This function is used to change the bond's option value and trigger
+ * a notification to user sapce. It can be used for both enabling/changing
+ * an option and for disabling it. RTNL lock must be obtained before calling
+ * this function.
+ */
+int __bond_opt_set_notify(struct bonding *bond,
+ unsigned int option, struct bond_opt_value *val)
+{
+ int ret = -ENOENT;
+
+ ASSERT_RTNL();
+
+ ret = __bond_opt_set(bond, option, val);
+
+ if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
+ call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
+
+ return ret;
+}
+
+/**
+ * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
+ * @bond: target bond device
+ * @option: option to set
+ * @buf: value to set it to
+ *
+ * This function tries to acquire RTNL without blocking and if successful
+ * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
+ */
+int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
+{
+ struct bond_opt_value optval;
+ int ret;
+
+ if (!rtnl_trylock())
+ return restart_syscall();
+ bond_opt_initstr(&optval, buf);
+ ret = __bond_opt_set_notify(bond, option, &optval);
+ rtnl_unlock();
+
+ return ret;
+}
+
+/**
+ * bond_opt_get - get a pointer to an option
+ * @option: option for which to return a pointer
+ *
+ * This function checks if option is valid and if so returns a pointer
+ * to its entry in the bond_opts[] option array.
+ */
+const struct bond_option *bond_opt_get(unsigned int option)
+{
+ if (!BOND_OPT_VALID(option))
+ return NULL;
+
+ return &bond_opts[option];
+}
+
+static int bond_option_mode_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ if (!bond_mode_uses_arp(newval->value)) {
+ if (bond->params.arp_interval) {
+ netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
+ newval->string);
+ /* disable arp monitoring */
+ bond->params.arp_interval = 0;
+ }
+
+ if (!bond->params.miimon) {
+ /* set miimon to default value */
+ bond->params.miimon = BOND_DEFAULT_MIIMON;
+ netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
+ bond->params.miimon);
+ }
+ }
+
+ if (newval->value == BOND_MODE_ALB)
+ bond->params.tlb_dynamic_lb = 1;
+
+ /* don't cache arp_validate between modes */
+ bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
+ bond->params.mode = newval->value;
+
+ return 0;
+}
+
+static int bond_option_active_slave_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ char ifname[IFNAMSIZ] = { 0, };
+ struct net_device *slave_dev;
+ int ret = 0;
+
+ sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
+ if (!strlen(ifname) || newval->string[0] == '\n') {
+ slave_dev = NULL;
+ } else {
+ slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
+ if (!slave_dev)
+ return -ENODEV;
+ }
+
+ if (slave_dev) {
+ if (!netif_is_bond_slave(slave_dev)) {
+ netdev_err(bond->dev, "Device %s is not bonding slave\n",
+ slave_dev->name);
+ return -EINVAL;
+ }
+
+ if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
+ netdev_err(bond->dev, "Device %s is not our slave\n",
+ slave_dev->name);
+ return -EINVAL;
+ }
+ }
+
+ block_netpoll_tx();
+ /* check to see if we are clearing active */
+ if (!slave_dev) {
+ netdev_dbg(bond->dev, "Clearing current active slave\n");
+ RCU_INIT_POINTER(bond->curr_active_slave, NULL);
+ bond_select_active_slave(bond);
+ } else {
+ struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
+ struct slave *new_active = bond_slave_get_rtnl(slave_dev);
+
+ BUG_ON(!new_active);
+
+ if (new_active == old_active) {
+ /* do nothing */
+ netdev_dbg(bond->dev, "%s is already the current active slave\n",
+ new_active->dev->name);
+ } else {
+ if (old_active && (new_active->link == BOND_LINK_UP) &&
+ bond_slave_is_up(new_active)) {
+ netdev_dbg(bond->dev, "Setting %s as active slave\n",
+ new_active->dev->name);
+ bond_change_active_slave(bond, new_active);
+ } else {
+ netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
+ new_active->dev->name,
+ new_active->dev->name);
+ ret = -EINVAL;
+ }
+ }
+ }
+ unblock_netpoll_tx();
+
+ return ret;
+}
+
+/* There are two tricky bits here. First, if MII monitoring is activated, then
+ * we must disable ARP monitoring. Second, if the timer isn't running, we must
+ * start it.
+ */
+static int bond_option_miimon_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
+ newval->value);
+ bond->params.miimon = newval->value;
+ if (bond->params.updelay)
+ netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
+ bond->params.updelay * bond->params.miimon);
+ if (bond->params.downdelay)
+ netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
+ bond->params.downdelay * bond->params.miimon);
+ if (newval->value && bond->params.arp_interval) {
+ netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
+ bond->params.arp_interval = 0;
+ if (bond->params.arp_validate)
+ bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
+ }
+ if (bond->dev->flags & IFF_UP) {
+ /* If the interface is up, we may need to fire off
+ * the MII timer. If the interface is down, the
+ * timer will get fired off when the open function
+ * is called.
+ */
+ if (!newval->value) {
+ cancel_delayed_work_sync(&bond->mii_work);
+ } else {
+ cancel_delayed_work_sync(&bond->arp_work);
+ queue_delayed_work(bond->wq, &bond->mii_work, 0);
+ }
+ }
+
+ return 0;
+}
+
+/* Set up and down delays. These must be multiples of the
+ * MII monitoring value, and are stored internally as the multiplier.
+ * Thus, we must translate to MS for the real world.
+ */
+static int bond_option_updelay_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ int value = newval->value;
+
+ if (!bond->params.miimon) {
+ netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
+ return -EPERM;
+ }
+ if ((value % bond->params.miimon) != 0) {
+ netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
+ value, bond->params.miimon,
+ (value / bond->params.miimon) *
+ bond->params.miimon);
+ }
+ bond->params.updelay = value / bond->params.miimon;
+ netdev_dbg(bond->dev, "Setting up delay to %d\n",
+ bond->params.updelay * bond->params.miimon);
+
+ return 0;
+}
+
+static int bond_option_downdelay_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ int value = newval->value;
+
+ if (!bond->params.miimon) {
+ netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
+ return -EPERM;
+ }
+ if ((value % bond->params.miimon) != 0) {
+ netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
+ value, bond->params.miimon,
+ (value / bond->params.miimon) *
+ bond->params.miimon);
+ }
+ bond->params.downdelay = value / bond->params.miimon;
+ netdev_dbg(bond->dev, "Setting down delay to %d\n",
+ bond->params.downdelay * bond->params.miimon);
+
+ return 0;
+}
+
+static int bond_option_use_carrier_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
+ newval->value);
+ bond->params.use_carrier = newval->value;
+
+ return 0;
+}
+
+/* There are two tricky bits here. First, if ARP monitoring is activated, then
+ * we must disable MII monitoring. Second, if the ARP timer isn't running,
+ * we must start it.
+ */
+static int bond_option_arp_interval_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
+ newval->value);
+ bond->params.arp_interval = newval->value;
+ if (newval->value) {
+ if (bond->params.miimon) {
+ netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
+ bond->params.miimon = 0;
+ }
+ if (!bond->params.arp_targets[0])
+ netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
+ }
+ if (bond->dev->flags & IFF_UP) {
+ /* If the interface is up, we may need to fire off
+ * the ARP timer. If the interface is down, the
+ * timer will get fired off when the open function
+ * is called.
+ */
+ if (!newval->value) {
+ if (bond->params.arp_validate)
+ bond->recv_probe = NULL;
+ cancel_delayed_work_sync(&bond->arp_work);
+ } else {
+ /* arp_validate can be set only in active-backup mode */
+ bond->recv_probe = bond_arp_rcv;
+ cancel_delayed_work_sync(&bond->mii_work);
+ queue_delayed_work(bond->wq, &bond->arp_work, 0);
+ }
+ }
+
+ return 0;
+}
+
+static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
+ __be32 target,
+ unsigned long last_rx)
+{
+ __be32 *targets = bond->params.arp_targets;
+ struct list_head *iter;
+ struct slave *slave;
+
+ if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
+ bond_for_each_slave(bond, slave, iter)
+ slave->target_last_arp_rx[slot] = last_rx;
+ targets[slot] = target;
+ }
+}
+
+static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
+{
+ __be32 *targets = bond->params.arp_targets;
+ int ind;
+
+ if (!bond_is_ip_target_ok(target)) {
+ netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
+ &target);
+ return -EINVAL;
+ }
+
+ if (bond_get_targets_ip(targets, target) != -1) { /* dup */
+ netdev_err(bond->dev, "ARP target %pI4 is already present\n",
+ &target);
+ return -EINVAL;
+ }
+
+ ind = bond_get_targets_ip(targets, 0); /* first free slot */
+ if (ind == -1) {
+ netdev_err(bond->dev, "ARP target table is full!\n");
+ return -EINVAL;
+ }
+
+ netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
+
+ _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
+
+ return 0;
+}
+
+static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
+{
+ return _bond_option_arp_ip_target_add(bond, target);
+}
+
+static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
+{
+ __be32 *targets = bond->params.arp_targets;
+ struct list_head *iter;
+ struct slave *slave;
+ unsigned long *targets_rx;
+ int ind, i;
+
+ if (!bond_is_ip_target_ok(target)) {
+ netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
+ &target);
+ return -EINVAL;
+ }
+
+ ind = bond_get_targets_ip(targets, target);
+ if (ind == -1) {
+ netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
+ &target);
+ return -EINVAL;
+ }
+
+ if (ind == 0 && !targets[1] && bond->params.arp_interval)
+ netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
+
+ netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
+
+ bond_for_each_slave(bond, slave, iter) {
+ targets_rx = slave->target_last_arp_rx;
+ for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
+ targets_rx[i] = targets_rx[i+1];
+ targets_rx[i] = 0;
+ }
+ for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
+ targets[i] = targets[i+1];
+ targets[i] = 0;
+
+ return 0;
+}
+
+void bond_option_arp_ip_targets_clear(struct bonding *bond)
+{
+ int i;
+
+ for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
+ _bond_options_arp_ip_target_set(bond, i, 0, 0);
+}
+
+static int bond_option_arp_ip_targets_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ int ret = -EPERM;
+ __be32 target;
+
+ if (newval->string) {
+ if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
+ netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
+ &target);
+ return ret;
+ }
+ if (newval->string[0] == '+')
+ ret = bond_option_arp_ip_target_add(bond, target);
+ else if (newval->string[0] == '-')
+ ret = bond_option_arp_ip_target_rem(bond, target);
+ else
+ netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
+ } else {
+ target = newval->value;
+ ret = bond_option_arp_ip_target_add(bond, target);
+ }
+
+ return ret;
+}
+
+static int bond_option_arp_validate_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
+ newval->string, newval->value);
+
+ if (bond->dev->flags & IFF_UP) {
+ if (!newval->value)
+ bond->recv_probe = NULL;
+ else if (bond->params.arp_interval)
+ bond->recv_probe = bond_arp_rcv;
+ }
+ bond->params.arp_validate = newval->value;
+
+ return 0;
+}
+
+static int bond_option_arp_all_targets_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
+ newval->string, newval->value);
+ bond->params.arp_all_targets = newval->value;
+
+ return 0;
+}
+
+static int bond_option_primary_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ char *p, *primary = newval->string;
+ struct list_head *iter;
+ struct slave *slave;
+
+ block_netpoll_tx();
+
+ p = strchr(primary, '\n');
+ if (p)
+ *p = '\0';
+ /* check to see if we are clearing primary */
+ if (!strlen(primary)) {
+ netdev_dbg(bond->dev, "Setting primary slave to None\n");
+ RCU_INIT_POINTER(bond->primary_slave, NULL);
+ memset(bond->params.primary, 0, sizeof(bond->params.primary));
+ bond_select_active_slave(bond);
+ goto out;
+ }
+
+ bond_for_each_slave(bond, slave, iter) {
+ if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
+ netdev_dbg(bond->dev, "Setting %s as primary slave\n",
+ slave->dev->name);
+ rcu_assign_pointer(bond->primary_slave, slave);
+ strcpy(bond->params.primary, slave->dev->name);
+ bond->force_primary = true;
+ bond_select_active_slave(bond);
+ goto out;
+ }
+ }
+
+ if (rtnl_dereference(bond->primary_slave)) {
+ netdev_dbg(bond->dev, "Setting primary slave to None\n");
+ RCU_INIT_POINTER(bond->primary_slave, NULL);
+ bond_select_active_slave(bond);
+ }
+ strncpy(bond->params.primary, primary, IFNAMSIZ);
+ bond->params.primary[IFNAMSIZ - 1] = 0;
+
+ netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
+ primary, bond->dev->name);
+
+out:
+ unblock_netpoll_tx();
+
+ return 0;
+}
+
+static int bond_option_primary_reselect_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
+ newval->string, newval->value);
+ bond->params.primary_reselect = newval->value;
+
+ block_netpoll_tx();
+ bond_select_active_slave(bond);
+ unblock_netpoll_tx();
+
+ return 0;
+}
+
+static int bond_option_fail_over_mac_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
+ newval->string, newval->value);
+ bond->params.fail_over_mac = newval->value;
+
+ return 0;
+}
+
+static int bond_option_xmit_hash_policy_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
+ newval->string, newval->value);
+ bond->params.xmit_policy = newval->value;
+
+ return 0;
+}
+
+static int bond_option_resend_igmp_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
+ newval->value);
+ bond->params.resend_igmp = newval->value;
+
+ return 0;
+}
+
+static int bond_option_num_peer_notif_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ bond->params.num_peer_notif = newval->value;
+
+ return 0;
+}
+
+static int bond_option_all_slaves_active_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ struct list_head *iter;
+ struct slave *slave;
+
+ if (newval->value == bond->params.all_slaves_active)
+ return 0;
+ bond->params.all_slaves_active = newval->value;
+ bond_for_each_slave(bond, slave, iter) {
+ if (!bond_is_active_slave(slave)) {
+ if (newval->value)
+ slave->inactive = 0;
+ else
+ slave->inactive = 1;
+ }
+ }
+
+ return 0;
+}
+
+static int bond_option_min_links_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ netdev_dbg(bond->dev, "Setting min links value to %llu\n",
+ newval->value);
+ bond->params.min_links = newval->value;
+ bond_set_carrier(bond);
+
+ return 0;
+}
+
+static int bond_option_lp_interval_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ bond->params.lp_interval = newval->value;
+
+ return 0;
+}
+
+static int bond_option_pps_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
+ newval->value);
+ bond->params.packets_per_slave = newval->value;
+ if (newval->value > 0) {
+ bond->params.reciprocal_packets_per_slave =
+ reciprocal_value(newval->value);
+ } else {
+ /* reciprocal_packets_per_slave is unused if
+ * packets_per_slave is 0 or 1, just initialize it
+ */
+ bond->params.reciprocal_packets_per_slave =
+ (struct reciprocal_value) { 0 };
+ }
+
+ return 0;
+}
+
+static int bond_option_lacp_rate_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
+ newval->string, newval->value);
+ bond->params.lacp_fast = newval->value;
+ bond_3ad_update_lacp_rate(bond);
+
+ return 0;
+}
+
+static int bond_option_ad_select_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
+ newval->string, newval->value);
+ bond->params.ad_select = newval->value;
+
+ return 0;
+}
+
+static int bond_option_queue_id_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ struct slave *slave, *update_slave;
+ struct net_device *sdev;
+ struct list_head *iter;
+ char *delim;
+ int ret = 0;
+ u16 qid;
+
+ /* delim will point to queue id if successful */
+ delim = strchr(newval->string, ':');
+ if (!delim)
+ goto err_no_cmd;
+
+ /* Terminate string that points to device name and bump it
+ * up one, so we can read the queue id there.
+ */
+ *delim = '\0';
+ if (sscanf(++delim, "%hd\n", &qid) != 1)
+ goto err_no_cmd;
+
+ /* Check buffer length, valid ifname and queue id */
+ if (!dev_valid_name(newval->string) ||
+ qid > bond->dev->real_num_tx_queues)
+ goto err_no_cmd;
+
+ /* Get the pointer to that interface if it exists */
+ sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
+ if (!sdev)
+ goto err_no_cmd;
+
+ /* Search for thes slave and check for duplicate qids */
+ update_slave = NULL;
+ bond_for_each_slave(bond, slave, iter) {
+ if (sdev == slave->dev)
+ /* We don't need to check the matching
+ * slave for dups, since we're overwriting it
+ */
+ update_slave = slave;
+ else if (qid && qid == slave->queue_id) {
+ goto err_no_cmd;
+ }
+ }
+
+ if (!update_slave)
+ goto err_no_cmd;
+
+ /* Actually set the qids for the slave */
+ update_slave->queue_id = qid;
+
+out:
+ return ret;
+
+err_no_cmd:
+ netdev_dbg(bond->dev, "invalid input for queue_id set\n");
+ ret = -EPERM;
+ goto out;
+
+}
+
+static int bond_option_slaves_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ char command[IFNAMSIZ + 1] = { 0, };
+ struct net_device *dev;
+ char *ifname;
+ int ret;
+
+ sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
+ ifname = command + 1;
+ if ((strlen(command) <= 1) ||
+ !dev_valid_name(ifname))
+ goto err_no_cmd;
+
+ dev = __dev_get_by_name(dev_net(bond->dev), ifname);
+ if (!dev) {
+ netdev_dbg(bond->dev, "interface %s does not exist!\n",
+ ifname);
+ ret = -ENODEV;
+ goto out;
+ }
+
+ switch (command[0]) {
+ case '+':
+ netdev_dbg(bond->dev, "Adding slave %s\n", dev->name);
+ ret = bond_enslave(bond->dev, dev, NULL);
+ break;
+
+ case '-':
+ netdev_dbg(bond->dev, "Removing slave %s\n", dev->name);
+ ret = bond_release(bond->dev, dev);
+ break;
+
+ default:
+ goto err_no_cmd;
+ }
+
+out:
+ return ret;
+
+err_no_cmd:
+ netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
+ ret = -EPERM;
+ goto out;
+}
+
+static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
+ newval->string, newval->value);
+ bond->params.tlb_dynamic_lb = newval->value;
+
+ return 0;
+}
+
+static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
+ newval->value);
+
+ bond->params.ad_actor_sys_prio = newval->value;
+ bond_3ad_update_ad_actor_settings(bond);
+
+ return 0;
+}
+
+static int bond_option_ad_actor_system_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ u8 macaddr[ETH_ALEN];
+ u8 *mac;
+
+ if (newval->string) {
+ if (!mac_pton(newval->string, macaddr))
+ goto err;
+ mac = macaddr;
+ } else {
+ mac = (u8 *)&newval->value;
+ }
+
+ if (!is_valid_ether_addr(mac))
+ goto err;
+
+ netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
+ ether_addr_copy(bond->params.ad_actor_system, mac);
+ bond_3ad_update_ad_actor_settings(bond);
+
+ return 0;
+
+err:
+ netdev_err(bond->dev, "Invalid MAC address.\n");
+ return -EINVAL;
+}
+
+static int bond_option_ad_user_port_key_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
+ newval->value);
+
+ bond->params.ad_user_port_key = newval->value;
+ return 0;
+}
diff --git a/drivers/net/bonding/bond_procfs.c b/drivers/net/bonding/bond_procfs.c
new file mode 100644
index 0000000..9f7d83e
--- /dev/null
+++ b/drivers/net/bonding/bond_procfs.c
@@ -0,0 +1,310 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/proc_fs.h>
+#include <linux/export.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+#include <net/bonding.h>
+
+#include "bonding_priv.h"
+
+static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(RCU)
+{
+ struct bonding *bond = PDE_DATA(file_inode(seq->file));
+ struct list_head *iter;
+ struct slave *slave;
+ loff_t off = 0;
+
+ rcu_read_lock();
+
+ if (*pos == 0)
+ return SEQ_START_TOKEN;
+
+ bond_for_each_slave_rcu(bond, slave, iter)
+ if (++off == *pos)
+ return slave;
+
+ return NULL;
+}
+
+static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct bonding *bond = PDE_DATA(file_inode(seq->file));
+ struct list_head *iter;
+ struct slave *slave;
+ bool found = false;
+
+ ++*pos;
+ if (v == SEQ_START_TOKEN)
+ return bond_first_slave_rcu(bond);
+
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ if (found)
+ return slave;
+ if (slave == v)
+ found = true;
+ }
+
+ return NULL;
+}
+
+static void bond_info_seq_stop(struct seq_file *seq, void *v)
+ __releases(RCU)
+{
+ rcu_read_unlock();
+}
+
+static void bond_info_show_master(struct seq_file *seq)
+{
+ struct bonding *bond = PDE_DATA(file_inode(seq->file));
+ const struct bond_opt_value *optval;
+ struct slave *curr, *primary;
+ int i;
+
+ curr = rcu_dereference(bond->curr_active_slave);
+
+ seq_printf(seq, "Bonding Mode: %s",
+ bond_mode_name(BOND_MODE(bond)));
+
+ if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
+ bond->params.fail_over_mac) {
+ optval = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
+ bond->params.fail_over_mac);
+ seq_printf(seq, " (fail_over_mac %s)", optval->string);
+ }
+
+ seq_printf(seq, "\n");
+
+ if (bond_mode_uses_xmit_hash(bond)) {
+ optval = bond_opt_get_val(BOND_OPT_XMIT_HASH,
+ bond->params.xmit_policy);
+ seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
+ optval->string, bond->params.xmit_policy);
+ }
+
+ if (bond_uses_primary(bond)) {
+ primary = rcu_dereference(bond->primary_slave);
+ seq_printf(seq, "Primary Slave: %s",
+ primary ? primary->dev->name : "None");
+ if (primary) {
+ optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
+ bond->params.primary_reselect);
+ seq_printf(seq, " (primary_reselect %s)",
+ optval->string);
+ }
+
+ seq_printf(seq, "\nCurrently Active Slave: %s\n",
+ (curr) ? curr->dev->name : "None");
+ }
+
+ seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
+ "up" : "down");
+ seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
+ seq_printf(seq, "Up Delay (ms): %d\n",
+ bond->params.updelay * bond->params.miimon);
+ seq_printf(seq, "Down Delay (ms): %d\n",
+ bond->params.downdelay * bond->params.miimon);
+
+
+ /* ARP information */
+ if (bond->params.arp_interval > 0) {
+ int printed = 0;
+ seq_printf(seq, "ARP Polling Interval (ms): %d\n",
+ bond->params.arp_interval);
+
+ seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
+
+ for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
+ if (!bond->params.arp_targets[i])
+ break;
+ if (printed)
+ seq_printf(seq, ",");
+ seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
+ printed = 1;
+ }
+ seq_printf(seq, "\n");
+ }
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+ struct ad_info ad_info;
+
+ seq_puts(seq, "\n802.3ad info\n");
+ seq_printf(seq, "LACP rate: %s\n",
+ (bond->params.lacp_fast) ? "fast" : "slow");
+ seq_printf(seq, "Min links: %d\n", bond->params.min_links);
+ optval = bond_opt_get_val(BOND_OPT_AD_SELECT,
+ bond->params.ad_select);
+ seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
+ optval->string);
+ if (capable(CAP_NET_ADMIN)) {
+ seq_printf(seq, "System priority: %d\n",
+ BOND_AD_INFO(bond).system.sys_priority);
+ seq_printf(seq, "System MAC address: %pM\n",
+ &BOND_AD_INFO(bond).system.sys_mac_addr);
+
+ if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
+ seq_printf(seq,
+ "bond %s has no active aggregator\n",
+ bond->dev->name);
+ } else {
+ seq_printf(seq, "Active Aggregator Info:\n");
+
+ seq_printf(seq, "\tAggregator ID: %d\n",
+ ad_info.aggregator_id);
+ seq_printf(seq, "\tNumber of ports: %d\n",
+ ad_info.ports);
+ seq_printf(seq, "\tActor Key: %d\n",
+ ad_info.actor_key);
+ seq_printf(seq, "\tPartner Key: %d\n",
+ ad_info.partner_key);
+ seq_printf(seq, "\tPartner Mac Address: %pM\n",
+ ad_info.partner_system);
+ }
+ }
+ }
+}
+
+static void bond_info_show_slave(struct seq_file *seq,
+ const struct slave *slave)
+{
+ struct bonding *bond = PDE_DATA(file_inode(seq->file));
+
+ seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
+ seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link));
+ if (slave->speed == SPEED_UNKNOWN)
+ seq_printf(seq, "Speed: %s\n", "Unknown");
+ else
+ seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
+
+ if (slave->duplex == DUPLEX_UNKNOWN)
+ seq_printf(seq, "Duplex: %s\n", "Unknown");
+ else
+ seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
+
+ seq_printf(seq, "Link Failure Count: %u\n",
+ slave->link_failure_count);
+
+ seq_printf(seq, "Permanent HW addr: %*phC\n",
+ slave->dev->addr_len, slave->perm_hwaddr);
+ seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+ const struct port *port = &SLAVE_AD_INFO(slave)->port;
+ const struct aggregator *agg = port->aggregator;
+
+ if (agg) {
+ seq_printf(seq, "Aggregator ID: %d\n",
+ agg->aggregator_identifier);
+ seq_printf(seq, "Actor Churn State: %s\n",
+ bond_3ad_churn_desc(port->sm_churn_actor_state));
+ seq_printf(seq, "Partner Churn State: %s\n",
+ bond_3ad_churn_desc(port->sm_churn_partner_state));
+ seq_printf(seq, "Actor Churned Count: %d\n",
+ port->churn_actor_count);
+ seq_printf(seq, "Partner Churned Count: %d\n",
+ port->churn_partner_count);
+
+ if (capable(CAP_NET_ADMIN)) {
+ seq_puts(seq, "details actor lacp pdu:\n");
+ seq_printf(seq, " system priority: %d\n",
+ port->actor_system_priority);
+ seq_printf(seq, " system mac address: %pM\n",
+ &port->actor_system);
+ seq_printf(seq, " port key: %d\n",
+ port->actor_oper_port_key);
+ seq_printf(seq, " port priority: %d\n",
+ port->actor_port_priority);
+ seq_printf(seq, " port number: %d\n",
+ port->actor_port_number);
+ seq_printf(seq, " port state: %d\n",
+ port->actor_oper_port_state);
+
+ seq_puts(seq, "details partner lacp pdu:\n");
+ seq_printf(seq, " system priority: %d\n",
+ port->partner_oper.system_priority);
+ seq_printf(seq, " system mac address: %pM\n",
+ &port->partner_oper.system);
+ seq_printf(seq, " oper key: %d\n",
+ port->partner_oper.key);
+ seq_printf(seq, " port priority: %d\n",
+ port->partner_oper.port_priority);
+ seq_printf(seq, " port number: %d\n",
+ port->partner_oper.port_number);
+ seq_printf(seq, " port state: %d\n",
+ port->partner_oper.port_state);
+ }
+ } else {
+ seq_puts(seq, "Aggregator ID: N/A\n");
+ }
+ }
+}
+
+static int bond_info_seq_show(struct seq_file *seq, void *v)
+{
+ if (v == SEQ_START_TOKEN) {
+ seq_printf(seq, "%s\n", bond_version);
+ bond_info_show_master(seq);
+ } else
+ bond_info_show_slave(seq, v);
+
+ return 0;
+}
+
+static const struct seq_operations bond_info_seq_ops = {
+ .start = bond_info_seq_start,
+ .next = bond_info_seq_next,
+ .stop = bond_info_seq_stop,
+ .show = bond_info_seq_show,
+};
+
+void bond_create_proc_entry(struct bonding *bond)
+{
+ struct net_device *bond_dev = bond->dev;
+ struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
+
+ if (bn->proc_dir) {
+ bond->proc_entry = proc_create_seq_data(bond_dev->name, 0444,
+ bn->proc_dir, &bond_info_seq_ops, bond);
+ if (bond->proc_entry == NULL)
+ netdev_warn(bond_dev, "Cannot create /proc/net/%s/%s\n",
+ DRV_NAME, bond_dev->name);
+ else
+ memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
+ }
+}
+
+void bond_remove_proc_entry(struct bonding *bond)
+{
+ struct net_device *bond_dev = bond->dev;
+ struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
+
+ if (bn->proc_dir && bond->proc_entry) {
+ remove_proc_entry(bond->proc_file_name, bn->proc_dir);
+ memset(bond->proc_file_name, 0, IFNAMSIZ);
+ bond->proc_entry = NULL;
+ }
+}
+
+/* Create the bonding directory under /proc/net, if doesn't exist yet.
+ * Caller must hold rtnl_lock.
+ */
+void __net_init bond_create_proc_dir(struct bond_net *bn)
+{
+ if (!bn->proc_dir) {
+ bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
+ if (!bn->proc_dir)
+ pr_warn("Warning: Cannot create /proc/net/%s\n",
+ DRV_NAME);
+ }
+}
+
+/* Destroy the bonding directory under /proc/net, if empty.
+ * Caller must hold rtnl_lock.
+ */
+void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
+{
+ if (bn->proc_dir) {
+ remove_proc_entry(DRV_NAME, bn->net->proc_net);
+ bn->proc_dir = NULL;
+ }
+}
diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
new file mode 100644
index 0000000..3584725
--- /dev/null
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -0,0 +1,819 @@
+/*
+ * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/sched/signal.h>
+#include <linux/fs.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
+#include <linux/in.h>
+#include <linux/sysfs.h>
+#include <linux/ctype.h>
+#include <linux/inet.h>
+#include <linux/rtnetlink.h>
+#include <linux/etherdevice.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+#include <linux/nsproxy.h>
+
+#include <net/bonding.h>
+
+#define to_bond(cd) ((struct bonding *)(netdev_priv(to_net_dev(cd))))
+
+/* "show" function for the bond_masters attribute.
+ * The class parameter is ignored.
+ */
+static ssize_t bonding_show_bonds(struct class *cls,
+ struct class_attribute *attr,
+ char *buf)
+{
+ struct bond_net *bn =
+ container_of(attr, struct bond_net, class_attr_bonding_masters);
+ int res = 0;
+ struct bonding *bond;
+
+ rtnl_lock();
+
+ list_for_each_entry(bond, &bn->dev_list, bond_list) {
+ if (res > (PAGE_SIZE - IFNAMSIZ)) {
+ /* not enough space for another interface name */
+ if ((PAGE_SIZE - res) > 10)
+ res = PAGE_SIZE - 10;
+ res += sprintf(buf + res, "++more++ ");
+ break;
+ }
+ res += sprintf(buf + res, "%s ", bond->dev->name);
+ }
+ if (res)
+ buf[res-1] = '\n'; /* eat the leftover space */
+
+ rtnl_unlock();
+ return res;
+}
+
+static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
+{
+ struct bonding *bond;
+
+ list_for_each_entry(bond, &bn->dev_list, bond_list) {
+ if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
+ return bond->dev;
+ }
+ return NULL;
+}
+
+/* "store" function for the bond_masters attribute. This is what
+ * creates and deletes entire bonds.
+ *
+ * The class parameter is ignored.
+ */
+static ssize_t bonding_store_bonds(struct class *cls,
+ struct class_attribute *attr,
+ const char *buffer, size_t count)
+{
+ struct bond_net *bn =
+ container_of(attr, struct bond_net, class_attr_bonding_masters);
+ char command[IFNAMSIZ + 1] = {0, };
+ char *ifname;
+ int rv, res = count;
+
+ sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
+ ifname = command + 1;
+ if ((strlen(command) <= 1) ||
+ !dev_valid_name(ifname))
+ goto err_no_cmd;
+
+ if (command[0] == '+') {
+ pr_info("%s is being created...\n", ifname);
+ rv = bond_create(bn->net, ifname);
+ if (rv) {
+ if (rv == -EEXIST)
+ pr_info("%s already exists\n", ifname);
+ else
+ pr_info("%s creation failed\n", ifname);
+ res = rv;
+ }
+ } else if (command[0] == '-') {
+ struct net_device *bond_dev;
+
+ rtnl_lock();
+ bond_dev = bond_get_by_name(bn, ifname);
+ if (bond_dev) {
+ pr_info("%s is being deleted...\n", ifname);
+ unregister_netdevice(bond_dev);
+ } else {
+ pr_err("unable to delete non-existent %s\n", ifname);
+ res = -ENODEV;
+ }
+ rtnl_unlock();
+ } else
+ goto err_no_cmd;
+
+ /* Always return either count or an error. If you return 0, you'll
+ * get called forever, which is bad.
+ */
+ return res;
+
+err_no_cmd:
+ pr_err("no command found in bonding_masters - use +ifname or -ifname\n");
+ return -EPERM;
+}
+
+/* class attribute for bond_masters file. This ends up in /sys/class/net */
+static const struct class_attribute class_attr_bonding_masters = {
+ .attr = {
+ .name = "bonding_masters",
+ .mode = 0644,
+ },
+ .show = bonding_show_bonds,
+ .store = bonding_store_bonds,
+};
+
+/* Generic "store" method for bonding sysfs option setting */
+static ssize_t bonding_sysfs_store_option(struct device *d,
+ struct device_attribute *attr,
+ const char *buffer, size_t count)
+{
+ struct bonding *bond = to_bond(d);
+ const struct bond_option *opt;
+ char *buffer_clone;
+ int ret;
+
+ opt = bond_opt_get_by_name(attr->attr.name);
+ if (WARN_ON(!opt))
+ return -ENOENT;
+ buffer_clone = kstrndup(buffer, count, GFP_KERNEL);
+ if (!buffer_clone)
+ return -ENOMEM;
+ ret = bond_opt_tryset_rtnl(bond, opt->id, buffer_clone);
+ if (!ret)
+ ret = count;
+ kfree(buffer_clone);
+
+ return ret;
+}
+
+/* Show the slaves in the current bond. */
+static ssize_t bonding_show_slaves(struct device *d,
+ struct device_attribute *attr, char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ struct list_head *iter;
+ struct slave *slave;
+ int res = 0;
+
+ if (!rtnl_trylock())
+ return restart_syscall();
+
+ bond_for_each_slave(bond, slave, iter) {
+ if (res > (PAGE_SIZE - IFNAMSIZ)) {
+ /* not enough space for another interface name */
+ if ((PAGE_SIZE - res) > 10)
+ res = PAGE_SIZE - 10;
+ res += sprintf(buf + res, "++more++ ");
+ break;
+ }
+ res += sprintf(buf + res, "%s ", slave->dev->name);
+ }
+
+ rtnl_unlock();
+
+ if (res)
+ buf[res-1] = '\n'; /* eat the leftover space */
+
+ return res;
+}
+static DEVICE_ATTR(slaves, 0644, bonding_show_slaves,
+ bonding_sysfs_store_option);
+
+/* Show the bonding mode. */
+static ssize_t bonding_show_mode(struct device *d,
+ struct device_attribute *attr, char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ const struct bond_opt_value *val;
+
+ val = bond_opt_get_val(BOND_OPT_MODE, BOND_MODE(bond));
+
+ return sprintf(buf, "%s %d\n", val->string, BOND_MODE(bond));
+}
+static DEVICE_ATTR(mode, 0644, bonding_show_mode, bonding_sysfs_store_option);
+
+/* Show the bonding transmit hash method. */
+static ssize_t bonding_show_xmit_hash(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ const struct bond_opt_value *val;
+
+ val = bond_opt_get_val(BOND_OPT_XMIT_HASH, bond->params.xmit_policy);
+
+ return sprintf(buf, "%s %d\n", val->string, bond->params.xmit_policy);
+}
+static DEVICE_ATTR(xmit_hash_policy, 0644,
+ bonding_show_xmit_hash, bonding_sysfs_store_option);
+
+/* Show arp_validate. */
+static ssize_t bonding_show_arp_validate(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ const struct bond_opt_value *val;
+
+ val = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
+ bond->params.arp_validate);
+
+ return sprintf(buf, "%s %d\n", val->string, bond->params.arp_validate);
+}
+static DEVICE_ATTR(arp_validate, 0644, bonding_show_arp_validate,
+ bonding_sysfs_store_option);
+
+/* Show arp_all_targets. */
+static ssize_t bonding_show_arp_all_targets(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ const struct bond_opt_value *val;
+
+ val = bond_opt_get_val(BOND_OPT_ARP_ALL_TARGETS,
+ bond->params.arp_all_targets);
+ return sprintf(buf, "%s %d\n",
+ val->string, bond->params.arp_all_targets);
+}
+static DEVICE_ATTR(arp_all_targets, 0644,
+ bonding_show_arp_all_targets, bonding_sysfs_store_option);
+
+/* Show fail_over_mac. */
+static ssize_t bonding_show_fail_over_mac(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ const struct bond_opt_value *val;
+
+ val = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
+ bond->params.fail_over_mac);
+
+ return sprintf(buf, "%s %d\n", val->string, bond->params.fail_over_mac);
+}
+static DEVICE_ATTR(fail_over_mac, 0644,
+ bonding_show_fail_over_mac, bonding_sysfs_store_option);
+
+/* Show the arp timer interval. */
+static ssize_t bonding_show_arp_interval(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%d\n", bond->params.arp_interval);
+}
+static DEVICE_ATTR(arp_interval, 0644,
+ bonding_show_arp_interval, bonding_sysfs_store_option);
+
+/* Show the arp targets. */
+static ssize_t bonding_show_arp_targets(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ int i, res = 0;
+
+ for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
+ if (bond->params.arp_targets[i])
+ res += sprintf(buf + res, "%pI4 ",
+ &bond->params.arp_targets[i]);
+ }
+ if (res)
+ buf[res-1] = '\n'; /* eat the leftover space */
+
+ return res;
+}
+static DEVICE_ATTR(arp_ip_target, 0644,
+ bonding_show_arp_targets, bonding_sysfs_store_option);
+
+/* Show the up and down delays. */
+static ssize_t bonding_show_downdelay(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
+}
+static DEVICE_ATTR(downdelay, 0644,
+ bonding_show_downdelay, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_updelay(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
+
+}
+static DEVICE_ATTR(updelay, 0644,
+ bonding_show_updelay, bonding_sysfs_store_option);
+
+/* Show the LACP interval. */
+static ssize_t bonding_show_lacp(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ const struct bond_opt_value *val;
+
+ val = bond_opt_get_val(BOND_OPT_LACP_RATE, bond->params.lacp_fast);
+
+ return sprintf(buf, "%s %d\n", val->string, bond->params.lacp_fast);
+}
+static DEVICE_ATTR(lacp_rate, 0644,
+ bonding_show_lacp, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_min_links(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%u\n", bond->params.min_links);
+}
+static DEVICE_ATTR(min_links, 0644,
+ bonding_show_min_links, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_ad_select(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ const struct bond_opt_value *val;
+
+ val = bond_opt_get_val(BOND_OPT_AD_SELECT, bond->params.ad_select);
+
+ return sprintf(buf, "%s %d\n", val->string, bond->params.ad_select);
+}
+static DEVICE_ATTR(ad_select, 0644,
+ bonding_show_ad_select, bonding_sysfs_store_option);
+
+/* Show the number of peer notifications to send after a failover event. */
+static ssize_t bonding_show_num_peer_notif(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ return sprintf(buf, "%d\n", bond->params.num_peer_notif);
+}
+static DEVICE_ATTR(num_grat_arp, 0644,
+ bonding_show_num_peer_notif, bonding_sysfs_store_option);
+static DEVICE_ATTR(num_unsol_na, 0644,
+ bonding_show_num_peer_notif, bonding_sysfs_store_option);
+
+/* Show the MII monitor interval. */
+static ssize_t bonding_show_miimon(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%d\n", bond->params.miimon);
+}
+static DEVICE_ATTR(miimon, 0644,
+ bonding_show_miimon, bonding_sysfs_store_option);
+
+/* Show the primary slave. */
+static ssize_t bonding_show_primary(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ struct slave *primary;
+ int count = 0;
+
+ rcu_read_lock();
+ primary = rcu_dereference(bond->primary_slave);
+ if (primary)
+ count = sprintf(buf, "%s\n", primary->dev->name);
+ rcu_read_unlock();
+
+ return count;
+}
+static DEVICE_ATTR(primary, 0644,
+ bonding_show_primary, bonding_sysfs_store_option);
+
+/* Show the primary_reselect flag. */
+static ssize_t bonding_show_primary_reselect(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ const struct bond_opt_value *val;
+
+ val = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
+ bond->params.primary_reselect);
+
+ return sprintf(buf, "%s %d\n",
+ val->string, bond->params.primary_reselect);
+}
+static DEVICE_ATTR(primary_reselect, 0644,
+ bonding_show_primary_reselect, bonding_sysfs_store_option);
+
+/* Show the use_carrier flag. */
+static ssize_t bonding_show_carrier(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%d\n", bond->params.use_carrier);
+}
+static DEVICE_ATTR(use_carrier, 0644,
+ bonding_show_carrier, bonding_sysfs_store_option);
+
+
+/* Show currently active_slave. */
+static ssize_t bonding_show_active_slave(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ struct net_device *slave_dev;
+ int count = 0;
+
+ rcu_read_lock();
+ slave_dev = bond_option_active_slave_get_rcu(bond);
+ if (slave_dev)
+ count = sprintf(buf, "%s\n", slave_dev->name);
+ rcu_read_unlock();
+
+ return count;
+}
+static DEVICE_ATTR(active_slave, 0644,
+ bonding_show_active_slave, bonding_sysfs_store_option);
+
+/* Show link status of the bond interface. */
+static ssize_t bonding_show_mii_status(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ bool active = netif_carrier_ok(bond->dev);
+
+ return sprintf(buf, "%s\n", active ? "up" : "down");
+}
+static DEVICE_ATTR(mii_status, 0444, bonding_show_mii_status, NULL);
+
+/* Show current 802.3ad aggregator ID. */
+static ssize_t bonding_show_ad_aggregator(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int count = 0;
+ struct bonding *bond = to_bond(d);
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+ struct ad_info ad_info;
+ count = sprintf(buf, "%d\n",
+ bond_3ad_get_active_agg_info(bond, &ad_info)
+ ? 0 : ad_info.aggregator_id);
+ }
+
+ return count;
+}
+static DEVICE_ATTR(ad_aggregator, 0444, bonding_show_ad_aggregator, NULL);
+
+
+/* Show number of active 802.3ad ports. */
+static ssize_t bonding_show_ad_num_ports(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int count = 0;
+ struct bonding *bond = to_bond(d);
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD) {
+ struct ad_info ad_info;
+ count = sprintf(buf, "%d\n",
+ bond_3ad_get_active_agg_info(bond, &ad_info)
+ ? 0 : ad_info.ports);
+ }
+
+ return count;
+}
+static DEVICE_ATTR(ad_num_ports, 0444, bonding_show_ad_num_ports, NULL);
+
+
+/* Show current 802.3ad actor key. */
+static ssize_t bonding_show_ad_actor_key(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int count = 0;
+ struct bonding *bond = to_bond(d);
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
+ struct ad_info ad_info;
+ count = sprintf(buf, "%d\n",
+ bond_3ad_get_active_agg_info(bond, &ad_info)
+ ? 0 : ad_info.actor_key);
+ }
+
+ return count;
+}
+static DEVICE_ATTR(ad_actor_key, 0444, bonding_show_ad_actor_key, NULL);
+
+
+/* Show current 802.3ad partner key. */
+static ssize_t bonding_show_ad_partner_key(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int count = 0;
+ struct bonding *bond = to_bond(d);
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
+ struct ad_info ad_info;
+ count = sprintf(buf, "%d\n",
+ bond_3ad_get_active_agg_info(bond, &ad_info)
+ ? 0 : ad_info.partner_key);
+ }
+
+ return count;
+}
+static DEVICE_ATTR(ad_partner_key, 0444, bonding_show_ad_partner_key, NULL);
+
+
+/* Show current 802.3ad partner mac. */
+static ssize_t bonding_show_ad_partner_mac(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int count = 0;
+ struct bonding *bond = to_bond(d);
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
+ struct ad_info ad_info;
+ if (!bond_3ad_get_active_agg_info(bond, &ad_info))
+ count = sprintf(buf, "%pM\n", ad_info.partner_system);
+ }
+
+ return count;
+}
+static DEVICE_ATTR(ad_partner_mac, 0444, bonding_show_ad_partner_mac, NULL);
+
+/* Show the queue_ids of the slaves in the current bond. */
+static ssize_t bonding_show_queue_id(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ struct list_head *iter;
+ struct slave *slave;
+ int res = 0;
+
+ if (!rtnl_trylock())
+ return restart_syscall();
+
+ bond_for_each_slave(bond, slave, iter) {
+ if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
+ /* not enough space for another interface_name:queue_id pair */
+ if ((PAGE_SIZE - res) > 10)
+ res = PAGE_SIZE - 10;
+ res += sprintf(buf + res, "++more++ ");
+ break;
+ }
+ res += sprintf(buf + res, "%s:%d ",
+ slave->dev->name, slave->queue_id);
+ }
+ if (res)
+ buf[res-1] = '\n'; /* eat the leftover space */
+
+ rtnl_unlock();
+
+ return res;
+}
+static DEVICE_ATTR(queue_id, 0644, bonding_show_queue_id,
+ bonding_sysfs_store_option);
+
+
+/* Show the all_slaves_active flag. */
+static ssize_t bonding_show_slaves_active(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%d\n", bond->params.all_slaves_active);
+}
+static DEVICE_ATTR(all_slaves_active, 0644,
+ bonding_show_slaves_active, bonding_sysfs_store_option);
+
+/* Show the number of IGMP membership reports to send on link failure */
+static ssize_t bonding_show_resend_igmp(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%d\n", bond->params.resend_igmp);
+}
+static DEVICE_ATTR(resend_igmp, 0644,
+ bonding_show_resend_igmp, bonding_sysfs_store_option);
+
+
+static ssize_t bonding_show_lp_interval(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%d\n", bond->params.lp_interval);
+}
+static DEVICE_ATTR(lp_interval, 0644,
+ bonding_show_lp_interval, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_tlb_dynamic_lb(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ return sprintf(buf, "%d\n", bond->params.tlb_dynamic_lb);
+}
+static DEVICE_ATTR(tlb_dynamic_lb, 0644,
+ bonding_show_tlb_dynamic_lb, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_packets_per_slave(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ unsigned int packets_per_slave = bond->params.packets_per_slave;
+
+ return sprintf(buf, "%u\n", packets_per_slave);
+}
+static DEVICE_ATTR(packets_per_slave, 0644,
+ bonding_show_packets_per_slave, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_ad_actor_sys_prio(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
+ return sprintf(buf, "%hu\n", bond->params.ad_actor_sys_prio);
+
+ return 0;
+}
+static DEVICE_ATTR(ad_actor_sys_prio, 0644,
+ bonding_show_ad_actor_sys_prio, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_ad_actor_system(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
+ return sprintf(buf, "%pM\n", bond->params.ad_actor_system);
+
+ return 0;
+}
+
+static DEVICE_ATTR(ad_actor_system, 0644,
+ bonding_show_ad_actor_system, bonding_sysfs_store_option);
+
+static ssize_t bonding_show_ad_user_port_key(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
+ return sprintf(buf, "%hu\n", bond->params.ad_user_port_key);
+
+ return 0;
+}
+static DEVICE_ATTR(ad_user_port_key, 0644,
+ bonding_show_ad_user_port_key, bonding_sysfs_store_option);
+
+static struct attribute *per_bond_attrs[] = {
+ &dev_attr_slaves.attr,
+ &dev_attr_mode.attr,
+ &dev_attr_fail_over_mac.attr,
+ &dev_attr_arp_validate.attr,
+ &dev_attr_arp_all_targets.attr,
+ &dev_attr_arp_interval.attr,
+ &dev_attr_arp_ip_target.attr,
+ &dev_attr_downdelay.attr,
+ &dev_attr_updelay.attr,
+ &dev_attr_lacp_rate.attr,
+ &dev_attr_ad_select.attr,
+ &dev_attr_xmit_hash_policy.attr,
+ &dev_attr_num_grat_arp.attr,
+ &dev_attr_num_unsol_na.attr,
+ &dev_attr_miimon.attr,
+ &dev_attr_primary.attr,
+ &dev_attr_primary_reselect.attr,
+ &dev_attr_use_carrier.attr,
+ &dev_attr_active_slave.attr,
+ &dev_attr_mii_status.attr,
+ &dev_attr_ad_aggregator.attr,
+ &dev_attr_ad_num_ports.attr,
+ &dev_attr_ad_actor_key.attr,
+ &dev_attr_ad_partner_key.attr,
+ &dev_attr_ad_partner_mac.attr,
+ &dev_attr_queue_id.attr,
+ &dev_attr_all_slaves_active.attr,
+ &dev_attr_resend_igmp.attr,
+ &dev_attr_min_links.attr,
+ &dev_attr_lp_interval.attr,
+ &dev_attr_packets_per_slave.attr,
+ &dev_attr_tlb_dynamic_lb.attr,
+ &dev_attr_ad_actor_sys_prio.attr,
+ &dev_attr_ad_actor_system.attr,
+ &dev_attr_ad_user_port_key.attr,
+ NULL,
+};
+
+static const struct attribute_group bonding_group = {
+ .name = "bonding",
+ .attrs = per_bond_attrs,
+};
+
+/* Initialize sysfs. This sets up the bonding_masters file in
+ * /sys/class/net.
+ */
+int bond_create_sysfs(struct bond_net *bn)
+{
+ int ret;
+
+ bn->class_attr_bonding_masters = class_attr_bonding_masters;
+ sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
+
+ ret = netdev_class_create_file_ns(&bn->class_attr_bonding_masters,
+ bn->net);
+ /* Permit multiple loads of the module by ignoring failures to
+ * create the bonding_masters sysfs file. Bonding devices
+ * created by second or subsequent loads of the module will
+ * not be listed in, or controllable by, bonding_masters, but
+ * will have the usual "bonding" sysfs directory.
+ *
+ * This is done to preserve backwards compatibility for
+ * initscripts/sysconfig, which load bonding multiple times to
+ * configure multiple bonding devices.
+ */
+ if (ret == -EEXIST) {
+ /* Is someone being kinky and naming a device bonding_master? */
+ if (__dev_get_by_name(bn->net,
+ class_attr_bonding_masters.attr.name))
+ pr_err("network device named %s already exists in sysfs\n",
+ class_attr_bonding_masters.attr.name);
+ ret = 0;
+ }
+
+ return ret;
+
+}
+
+/* Remove /sys/class/net/bonding_masters. */
+void bond_destroy_sysfs(struct bond_net *bn)
+{
+ netdev_class_remove_file_ns(&bn->class_attr_bonding_masters, bn->net);
+}
+
+/* Initialize sysfs for each bond. This sets up and registers
+ * the 'bondctl' directory for each individual bond under /sys/class/net.
+ */
+void bond_prepare_sysfs_group(struct bonding *bond)
+{
+ bond->dev->sysfs_groups[0] = &bonding_group;
+}
+
diff --git a/drivers/net/bonding/bond_sysfs_slave.c b/drivers/net/bonding/bond_sysfs_slave.c
new file mode 100644
index 0000000..2f120b2
--- /dev/null
+++ b/drivers/net/bonding/bond_sysfs_slave.c
@@ -0,0 +1,176 @@
+/* Sysfs attributes of bond slaves
+ *
+ * Copyright (c) 2014 Scott Feldman <sfeldma@cumulusnetworks.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/capability.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+
+#include <net/bonding.h>
+
+struct slave_attribute {
+ struct attribute attr;
+ ssize_t (*show)(struct slave *, char *);
+};
+
+#define SLAVE_ATTR(_name, _mode, _show) \
+const struct slave_attribute slave_attr_##_name = { \
+ .attr = {.name = __stringify(_name), \
+ .mode = _mode }, \
+ .show = _show, \
+};
+#define SLAVE_ATTR_RO(_name) \
+ SLAVE_ATTR(_name, 0444, _name##_show)
+
+static ssize_t state_show(struct slave *slave, char *buf)
+{
+ switch (bond_slave_state(slave)) {
+ case BOND_STATE_ACTIVE:
+ return sprintf(buf, "active\n");
+ case BOND_STATE_BACKUP:
+ return sprintf(buf, "backup\n");
+ default:
+ return sprintf(buf, "UNKNOWN\n");
+ }
+}
+static SLAVE_ATTR_RO(state);
+
+static ssize_t mii_status_show(struct slave *slave, char *buf)
+{
+ return sprintf(buf, "%s\n", bond_slave_link_status(slave->link));
+}
+static SLAVE_ATTR_RO(mii_status);
+
+static ssize_t link_failure_count_show(struct slave *slave, char *buf)
+{
+ return sprintf(buf, "%d\n", slave->link_failure_count);
+}
+static SLAVE_ATTR_RO(link_failure_count);
+
+static ssize_t perm_hwaddr_show(struct slave *slave, char *buf)
+{
+ return sprintf(buf, "%pM\n", slave->perm_hwaddr);
+}
+static SLAVE_ATTR_RO(perm_hwaddr);
+
+static ssize_t queue_id_show(struct slave *slave, char *buf)
+{
+ return sprintf(buf, "%d\n", slave->queue_id);
+}
+static SLAVE_ATTR_RO(queue_id);
+
+static ssize_t ad_aggregator_id_show(struct slave *slave, char *buf)
+{
+ const struct aggregator *agg;
+
+ if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
+ agg = SLAVE_AD_INFO(slave)->port.aggregator;
+ if (agg)
+ return sprintf(buf, "%d\n",
+ agg->aggregator_identifier);
+ }
+
+ return sprintf(buf, "N/A\n");
+}
+static SLAVE_ATTR_RO(ad_aggregator_id);
+
+static ssize_t ad_actor_oper_port_state_show(struct slave *slave, char *buf)
+{
+ const struct port *ad_port;
+
+ if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
+ ad_port = &SLAVE_AD_INFO(slave)->port;
+ if (ad_port->aggregator)
+ return sprintf(buf, "%u\n",
+ ad_port->actor_oper_port_state);
+ }
+
+ return sprintf(buf, "N/A\n");
+}
+static SLAVE_ATTR_RO(ad_actor_oper_port_state);
+
+static ssize_t ad_partner_oper_port_state_show(struct slave *slave, char *buf)
+{
+ const struct port *ad_port;
+
+ if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
+ ad_port = &SLAVE_AD_INFO(slave)->port;
+ if (ad_port->aggregator)
+ return sprintf(buf, "%u\n",
+ ad_port->partner_oper.port_state);
+ }
+
+ return sprintf(buf, "N/A\n");
+}
+static SLAVE_ATTR_RO(ad_partner_oper_port_state);
+
+static const struct slave_attribute *slave_attrs[] = {
+ &slave_attr_state,
+ &slave_attr_mii_status,
+ &slave_attr_link_failure_count,
+ &slave_attr_perm_hwaddr,
+ &slave_attr_queue_id,
+ &slave_attr_ad_aggregator_id,
+ &slave_attr_ad_actor_oper_port_state,
+ &slave_attr_ad_partner_oper_port_state,
+ NULL
+};
+
+#define to_slave_attr(_at) container_of(_at, struct slave_attribute, attr)
+#define to_slave(obj) container_of(obj, struct slave, kobj)
+
+static ssize_t slave_show(struct kobject *kobj,
+ struct attribute *attr, char *buf)
+{
+ struct slave_attribute *slave_attr = to_slave_attr(attr);
+ struct slave *slave = to_slave(kobj);
+
+ return slave_attr->show(slave, buf);
+}
+
+static const struct sysfs_ops slave_sysfs_ops = {
+ .show = slave_show,
+};
+
+static struct kobj_type slave_ktype = {
+#ifdef CONFIG_SYSFS
+ .sysfs_ops = &slave_sysfs_ops,
+#endif
+};
+
+int bond_sysfs_slave_add(struct slave *slave)
+{
+ const struct slave_attribute **a;
+ int err;
+
+ err = kobject_init_and_add(&slave->kobj, &slave_ktype,
+ &(slave->dev->dev.kobj), "bonding_slave");
+ if (err)
+ return err;
+
+ for (a = slave_attrs; *a; ++a) {
+ err = sysfs_create_file(&slave->kobj, &((*a)->attr));
+ if (err) {
+ kobject_put(&slave->kobj);
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+void bond_sysfs_slave_del(struct slave *slave)
+{
+ const struct slave_attribute **a;
+
+ for (a = slave_attrs; *a; ++a)
+ sysfs_remove_file(&slave->kobj, &((*a)->attr));
+
+ kobject_put(&slave->kobj);
+}
diff --git a/drivers/net/bonding/bonding_priv.h b/drivers/net/bonding/bonding_priv.h
new file mode 100644
index 0000000..5a4d81a
--- /dev/null
+++ b/drivers/net/bonding/bonding_priv.h
@@ -0,0 +1,25 @@
+/*
+ * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
+ *
+ * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
+ * NCM: Network and Communications Management, Inc.
+ *
+ * BUT, I'm the one who modified it for ethernet, so:
+ * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU Public License, incorporated herein by reference.
+ *
+ */
+
+#ifndef _BONDING_PRIV_H
+#define _BONDING_PRIV_H
+
+#define DRV_VERSION "3.7.1"
+#define DRV_RELDATE "April 27, 2011"
+#define DRV_NAME "bonding"
+#define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
+
+#define bond_version DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"
+
+#endif