v4.19.13 snapshot.
diff --git a/drivers/scsi/fcoe/Makefile b/drivers/scsi/fcoe/Makefile
new file mode 100644
index 0000000..aed0f5d
--- /dev/null
+++ b/drivers/scsi/fcoe/Makefile
@@ -0,0 +1,4 @@
+obj-$(CONFIG_FCOE) += fcoe.o
+obj-$(CONFIG_LIBFCOE) += libfcoe.o
+
+libfcoe-objs := fcoe_ctlr.o fcoe_transport.o fcoe_sysfs.o
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
new file mode 100644
index 0000000..f46b312
--- /dev/null
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -0,0 +1,2851 @@
+/*
+ * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/crc32.h>
+#include <linux/slab.h>
+#include <linux/cpu.h>
+#include <linux/fs.h>
+#include <linux/sysfs.h>
+#include <linux/ctype.h>
+#include <linux/workqueue.h>
+#include <net/dcbnl.h>
+#include <net/dcbevent.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsicam.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_fc.h>
+#include <net/rtnetlink.h>
+
+#include <scsi/fc/fc_encaps.h>
+#include <scsi/fc/fc_fip.h>
+#include <scsi/fc/fc_fcoe.h>
+
+#include <scsi/libfc.h>
+#include <scsi/fc_frame.h>
+#include <scsi/libfcoe.h>
+
+#include "fcoe.h"
+
+MODULE_AUTHOR("Open-FCoE.org");
+MODULE_DESCRIPTION("FCoE");
+MODULE_LICENSE("GPL v2");
+
+/* Performance tuning parameters for fcoe */
+static unsigned int fcoe_ddp_min = 4096;
+module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
+ "Direct Data Placement (DDP).");
+
+unsigned int fcoe_debug_logging;
+module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
+
+static unsigned int fcoe_e_d_tov = 2 * 1000;
+module_param_named(e_d_tov, fcoe_e_d_tov, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(e_d_tov, "E_D_TOV in ms, default 2000");
+
+static unsigned int fcoe_r_a_tov = 2 * 2 * 1000;
+module_param_named(r_a_tov, fcoe_r_a_tov, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(r_a_tov, "R_A_TOV in ms, default 4000");
+
+static DEFINE_MUTEX(fcoe_config_mutex);
+
+static struct workqueue_struct *fcoe_wq;
+
+/* fcoe host list */
+/* must only by accessed under the RTNL mutex */
+static LIST_HEAD(fcoe_hostlist);
+static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
+
+/* Function Prototypes */
+static int fcoe_reset(struct Scsi_Host *);
+static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
+static int fcoe_rcv(struct sk_buff *, struct net_device *,
+ struct packet_type *, struct net_device *);
+static void fcoe_percpu_clean(struct fc_lport *);
+static int fcoe_link_ok(struct fc_lport *);
+
+static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
+static int fcoe_hostlist_add(const struct fc_lport *);
+static void fcoe_hostlist_del(const struct fc_lport *);
+
+static int fcoe_device_notification(struct notifier_block *, ulong, void *);
+static void fcoe_dev_setup(void);
+static void fcoe_dev_cleanup(void);
+static struct fcoe_interface
+*fcoe_hostlist_lookup_port(const struct net_device *);
+
+static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
+ struct packet_type *, struct net_device *);
+static int fcoe_fip_vlan_recv(struct sk_buff *, struct net_device *,
+ struct packet_type *, struct net_device *);
+
+static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
+static void fcoe_update_src_mac(struct fc_lport *, u8 *);
+static u8 *fcoe_get_src_mac(struct fc_lport *);
+static void fcoe_destroy_work(struct work_struct *);
+
+static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
+ unsigned int);
+static int fcoe_ddp_done(struct fc_lport *, u16);
+static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
+ unsigned int);
+static int fcoe_dcb_app_notification(struct notifier_block *notifier,
+ ulong event, void *ptr);
+
+static bool fcoe_match(struct net_device *netdev);
+static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode);
+static int fcoe_destroy(struct net_device *netdev);
+static int fcoe_enable(struct net_device *netdev);
+static int fcoe_disable(struct net_device *netdev);
+
+/* fcoe_syfs control interface handlers */
+static int fcoe_ctlr_alloc(struct net_device *netdev);
+static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev);
+static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev);
+
+static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
+ u32 did, struct fc_frame *,
+ unsigned int op,
+ void (*resp)(struct fc_seq *,
+ struct fc_frame *,
+ void *),
+ void *, u32 timeout);
+static void fcoe_recv_frame(struct sk_buff *skb);
+
+/* notification function for packets from net device */
+static struct notifier_block fcoe_notifier = {
+ .notifier_call = fcoe_device_notification,
+};
+
+/* notification function for DCB events */
+static struct notifier_block dcb_notifier = {
+ .notifier_call = fcoe_dcb_app_notification,
+};
+
+static struct scsi_transport_template *fcoe_nport_scsi_transport;
+static struct scsi_transport_template *fcoe_vport_scsi_transport;
+
+static int fcoe_vport_destroy(struct fc_vport *);
+static int fcoe_vport_create(struct fc_vport *, bool disabled);
+static int fcoe_vport_disable(struct fc_vport *, bool disable);
+static void fcoe_set_vport_symbolic_name(struct fc_vport *);
+static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);
+static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *);
+static void fcoe_vport_remove(struct fc_lport *);
+
+static struct fcoe_sysfs_function_template fcoe_sysfs_templ = {
+ .set_fcoe_ctlr_mode = fcoe_ctlr_mode,
+ .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled,
+ .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb,
+ .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb,
+ .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb,
+ .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb,
+ .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb,
+ .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb,
+
+ .get_fcoe_fcf_selected = fcoe_fcf_get_selected,
+ .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id,
+};
+
+static struct libfc_function_template fcoe_libfc_fcn_templ = {
+ .frame_send = fcoe_xmit,
+ .ddp_setup = fcoe_ddp_setup,
+ .ddp_done = fcoe_ddp_done,
+ .ddp_target = fcoe_ddp_target,
+ .elsct_send = fcoe_elsct_send,
+ .get_lesb = fcoe_get_lesb,
+ .lport_set_port_id = fcoe_set_port_id,
+};
+
+static struct fc_function_template fcoe_nport_fc_functions = {
+ .show_host_node_name = 1,
+ .show_host_port_name = 1,
+ .show_host_supported_classes = 1,
+ .show_host_supported_fc4s = 1,
+ .show_host_active_fc4s = 1,
+ .show_host_maxframe_size = 1,
+ .show_host_serial_number = 1,
+ .show_host_manufacturer = 1,
+ .show_host_model = 1,
+ .show_host_model_description = 1,
+ .show_host_hardware_version = 1,
+ .show_host_driver_version = 1,
+ .show_host_firmware_version = 1,
+ .show_host_optionrom_version = 1,
+
+ .show_host_port_id = 1,
+ .show_host_supported_speeds = 1,
+ .get_host_speed = fc_get_host_speed,
+ .show_host_speed = 1,
+ .show_host_port_type = 1,
+ .get_host_port_state = fc_get_host_port_state,
+ .show_host_port_state = 1,
+ .show_host_symbolic_name = 1,
+
+ .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
+ .show_rport_maxframe_size = 1,
+ .show_rport_supported_classes = 1,
+
+ .show_host_fabric_name = 1,
+ .show_starget_node_name = 1,
+ .show_starget_port_name = 1,
+ .show_starget_port_id = 1,
+ .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
+ .show_rport_dev_loss_tmo = 1,
+ .get_fc_host_stats = fc_get_host_stats,
+ .issue_fc_host_lip = fcoe_reset,
+
+ .terminate_rport_io = fc_rport_terminate_io,
+
+ .vport_create = fcoe_vport_create,
+ .vport_delete = fcoe_vport_destroy,
+ .vport_disable = fcoe_vport_disable,
+ .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
+
+ .bsg_request = fc_lport_bsg_request,
+};
+
+static struct fc_function_template fcoe_vport_fc_functions = {
+ .show_host_node_name = 1,
+ .show_host_port_name = 1,
+ .show_host_supported_classes = 1,
+ .show_host_supported_fc4s = 1,
+ .show_host_active_fc4s = 1,
+ .show_host_maxframe_size = 1,
+ .show_host_serial_number = 1,
+ .show_host_manufacturer = 1,
+ .show_host_model = 1,
+ .show_host_model_description = 1,
+ .show_host_hardware_version = 1,
+ .show_host_driver_version = 1,
+ .show_host_firmware_version = 1,
+ .show_host_optionrom_version = 1,
+
+ .show_host_port_id = 1,
+ .show_host_supported_speeds = 1,
+ .get_host_speed = fc_get_host_speed,
+ .show_host_speed = 1,
+ .show_host_port_type = 1,
+ .get_host_port_state = fc_get_host_port_state,
+ .show_host_port_state = 1,
+ .show_host_symbolic_name = 1,
+
+ .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
+ .show_rport_maxframe_size = 1,
+ .show_rport_supported_classes = 1,
+
+ .show_host_fabric_name = 1,
+ .show_starget_node_name = 1,
+ .show_starget_port_name = 1,
+ .show_starget_port_id = 1,
+ .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
+ .show_rport_dev_loss_tmo = 1,
+ .get_fc_host_stats = fc_get_host_stats,
+ .issue_fc_host_lip = fcoe_reset,
+
+ .terminate_rport_io = fc_rport_terminate_io,
+
+ .bsg_request = fc_lport_bsg_request,
+};
+
+static struct scsi_host_template fcoe_shost_template = {
+ .module = THIS_MODULE,
+ .name = "FCoE Driver",
+ .proc_name = FCOE_NAME,
+ .queuecommand = fc_queuecommand,
+ .eh_timed_out = fc_eh_timed_out,
+ .eh_abort_handler = fc_eh_abort,
+ .eh_device_reset_handler = fc_eh_device_reset,
+ .eh_host_reset_handler = fc_eh_host_reset,
+ .slave_alloc = fc_slave_alloc,
+ .change_queue_depth = scsi_change_queue_depth,
+ .this_id = -1,
+ .cmd_per_lun = 3,
+ .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
+ .use_clustering = ENABLE_CLUSTERING,
+ .sg_tablesize = SG_ALL,
+ .max_sectors = 0xffff,
+ .track_queue_depth = 1,
+};
+
+/**
+ * fcoe_interface_setup() - Setup a FCoE interface
+ * @fcoe: The new FCoE interface
+ * @netdev: The net device that the fcoe interface is on
+ *
+ * Returns : 0 for success
+ * Locking: must be called with the RTNL mutex held
+ */
+static int fcoe_interface_setup(struct fcoe_interface *fcoe,
+ struct net_device *netdev)
+{
+ struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
+ struct netdev_hw_addr *ha;
+ struct net_device *real_dev;
+ u8 flogi_maddr[ETH_ALEN];
+ const struct net_device_ops *ops;
+
+ fcoe->netdev = netdev;
+
+ /* Let LLD initialize for FCoE */
+ ops = netdev->netdev_ops;
+ if (ops->ndo_fcoe_enable) {
+ if (ops->ndo_fcoe_enable(netdev))
+ FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
+ " specific feature for LLD.\n");
+ }
+
+ /* Do not support for bonding device */
+ if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
+ FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
+ return -EOPNOTSUPP;
+ }
+
+ /* look for SAN MAC address, if multiple SAN MACs exist, only
+ * use the first one for SPMA */
+ real_dev = is_vlan_dev(netdev) ? vlan_dev_real_dev(netdev) : netdev;
+ fcoe->realdev = real_dev;
+ rcu_read_lock();
+ for_each_dev_addr(real_dev, ha) {
+ if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
+ (is_valid_ether_addr(ha->addr))) {
+ memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
+ fip->spma = 1;
+ break;
+ }
+ }
+ rcu_read_unlock();
+
+ /* setup Source Mac Address */
+ if (!fip->spma)
+ memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
+
+ /*
+ * Add FCoE MAC address as second unicast MAC address
+ * or enter promiscuous mode if not capable of listening
+ * for multiple unicast MACs.
+ */
+ memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
+ dev_uc_add(netdev, flogi_maddr);
+ if (fip->spma)
+ dev_uc_add(netdev, fip->ctl_src_addr);
+ if (fip->mode == FIP_MODE_VN2VN) {
+ dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
+ dev_mc_add(netdev, FIP_ALL_P2P_MACS);
+ } else
+ dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
+
+ /*
+ * setup the receive function from ethernet driver
+ * on the ethertype for the given device
+ */
+ fcoe->fcoe_packet_type.func = fcoe_rcv;
+ fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE);
+ fcoe->fcoe_packet_type.dev = netdev;
+ dev_add_pack(&fcoe->fcoe_packet_type);
+
+ fcoe->fip_packet_type.func = fcoe_fip_recv;
+ fcoe->fip_packet_type.type = htons(ETH_P_FIP);
+ fcoe->fip_packet_type.dev = netdev;
+ dev_add_pack(&fcoe->fip_packet_type);
+
+ if (netdev != real_dev) {
+ fcoe->fip_vlan_packet_type.func = fcoe_fip_vlan_recv;
+ fcoe->fip_vlan_packet_type.type = htons(ETH_P_FIP);
+ fcoe->fip_vlan_packet_type.dev = real_dev;
+ dev_add_pack(&fcoe->fip_vlan_packet_type);
+ }
+ return 0;
+}
+
+/**
+ * fcoe_interface_create() - Create a FCoE interface on a net device
+ * @netdev: The net device to create the FCoE interface on
+ * @fip_mode: The mode to use for FIP
+ *
+ * Returns: pointer to a struct fcoe_interface or NULL on error
+ */
+static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
+ enum fip_state fip_mode)
+{
+ struct fcoe_ctlr_device *ctlr_dev;
+ struct fcoe_ctlr *ctlr;
+ struct fcoe_interface *fcoe;
+ int size;
+ int err;
+
+ if (!try_module_get(THIS_MODULE)) {
+ FCOE_NETDEV_DBG(netdev,
+ "Could not get a reference to the module\n");
+ fcoe = ERR_PTR(-EBUSY);
+ goto out;
+ }
+
+ size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface);
+ ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ,
+ size);
+ if (!ctlr_dev) {
+ FCOE_DBG("Failed to add fcoe_ctlr_device\n");
+ fcoe = ERR_PTR(-ENOMEM);
+ goto out_putmod;
+ }
+
+ ctlr = fcoe_ctlr_device_priv(ctlr_dev);
+ ctlr->cdev = ctlr_dev;
+ fcoe = fcoe_ctlr_priv(ctlr);
+
+ dev_hold(netdev);
+
+ /*
+ * Initialize FIP.
+ */
+ fcoe_ctlr_init(ctlr, fip_mode);
+ ctlr->send = fcoe_fip_send;
+ ctlr->update_mac = fcoe_update_src_mac;
+ ctlr->get_src_addr = fcoe_get_src_mac;
+
+ err = fcoe_interface_setup(fcoe, netdev);
+ if (err) {
+ fcoe_ctlr_destroy(ctlr);
+ fcoe_ctlr_device_delete(ctlr_dev);
+ dev_put(netdev);
+ fcoe = ERR_PTR(err);
+ goto out_putmod;
+ }
+
+ goto out;
+
+out_putmod:
+ module_put(THIS_MODULE);
+out:
+ return fcoe;
+}
+
+/**
+ * fcoe_interface_remove() - remove FCoE interface from netdev
+ * @fcoe: The FCoE interface to be cleaned up
+ *
+ * Caller must be holding the RTNL mutex
+ */
+static void fcoe_interface_remove(struct fcoe_interface *fcoe)
+{
+ struct net_device *netdev = fcoe->netdev;
+ struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
+ u8 flogi_maddr[ETH_ALEN];
+ const struct net_device_ops *ops;
+
+ /*
+ * Don't listen for Ethernet packets anymore.
+ * synchronize_net() ensures that the packet handlers are not running
+ * on another CPU. dev_remove_pack() would do that, this calls the
+ * unsyncronized version __dev_remove_pack() to avoid multiple delays.
+ */
+ __dev_remove_pack(&fcoe->fcoe_packet_type);
+ __dev_remove_pack(&fcoe->fip_packet_type);
+ if (netdev != fcoe->realdev)
+ __dev_remove_pack(&fcoe->fip_vlan_packet_type);
+ synchronize_net();
+
+ /* Delete secondary MAC addresses */
+ memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
+ dev_uc_del(netdev, flogi_maddr);
+ if (fip->spma)
+ dev_uc_del(netdev, fip->ctl_src_addr);
+ if (fip->mode == FIP_MODE_VN2VN) {
+ dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
+ dev_mc_del(netdev, FIP_ALL_P2P_MACS);
+ } else
+ dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
+
+ /* Tell the LLD we are done w/ FCoE */
+ ops = netdev->netdev_ops;
+ if (ops->ndo_fcoe_disable) {
+ if (ops->ndo_fcoe_disable(netdev))
+ FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
+ " specific feature for LLD.\n");
+ }
+ fcoe->removed = 1;
+}
+
+
+/**
+ * fcoe_interface_cleanup() - Clean up a FCoE interface
+ * @fcoe: The FCoE interface to be cleaned up
+ */
+static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
+{
+ struct net_device *netdev = fcoe->netdev;
+ struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
+
+ /* Release the self-reference taken during fcoe_interface_create() */
+ /* tear-down the FCoE controller */
+ fcoe_ctlr_destroy(fip);
+ scsi_host_put(fip->lp->host);
+ dev_put(netdev);
+ module_put(THIS_MODULE);
+}
+
+/**
+ * fcoe_fip_recv() - Handler for received FIP frames
+ * @skb: The receive skb
+ * @netdev: The associated net device
+ * @ptype: The packet_type structure which was used to register this handler
+ * @orig_dev: The original net_device the skb was received on.
+ * (in case dev is a bond)
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
+ struct packet_type *ptype,
+ struct net_device *orig_dev)
+{
+ struct fcoe_interface *fcoe;
+ struct fcoe_ctlr *ctlr;
+
+ fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
+ ctlr = fcoe_to_ctlr(fcoe);
+ fcoe_ctlr_recv(ctlr, skb);
+ return 0;
+}
+
+/**
+ * fcoe_fip_vlan_recv() - Handler for received FIP VLAN discovery frames
+ * @skb: The receive skb
+ * @netdev: The associated net device
+ * @ptype: The packet_type structure which was used to register this handler
+ * @orig_dev: The original net_device the skb was received on.
+ * (in case dev is a bond)
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_fip_vlan_recv(struct sk_buff *skb, struct net_device *netdev,
+ struct packet_type *ptype,
+ struct net_device *orig_dev)
+{
+ struct fcoe_interface *fcoe;
+ struct fcoe_ctlr *ctlr;
+
+ fcoe = container_of(ptype, struct fcoe_interface, fip_vlan_packet_type);
+ ctlr = fcoe_to_ctlr(fcoe);
+ fcoe_ctlr_recv(ctlr, skb);
+ return 0;
+}
+
+/**
+ * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
+ * @port: The FCoE port
+ * @skb: The FIP/FCoE packet to be sent
+ */
+static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
+{
+ if (port->fcoe_pending_queue.qlen)
+ fcoe_check_wait_queue(port->lport, skb);
+ else if (fcoe_start_io(skb))
+ fcoe_check_wait_queue(port->lport, skb);
+}
+
+/**
+ * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
+ * @fip: The FCoE controller
+ * @skb: The FIP packet to be sent
+ */
+static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
+{
+ struct fcoe_interface *fcoe = fcoe_from_ctlr(fip);
+ struct fip_frame {
+ struct ethhdr eth;
+ struct fip_header fip;
+ } __packed *frame;
+
+ /*
+ * Use default VLAN for FIP VLAN discovery protocol
+ */
+ frame = (struct fip_frame *)skb->data;
+ if (ntohs(frame->eth.h_proto) == ETH_P_FIP &&
+ ntohs(frame->fip.fip_op) == FIP_OP_VLAN &&
+ fcoe->realdev != fcoe->netdev)
+ skb->dev = fcoe->realdev;
+ else
+ skb->dev = fcoe->netdev;
+ fcoe_port_send(lport_priv(fip->lp), skb);
+}
+
+/**
+ * fcoe_update_src_mac() - Update the Ethernet MAC filters
+ * @lport: The local port to update the source MAC on
+ * @addr: Unicast MAC address to add
+ *
+ * Remove any previously-set unicast MAC filter.
+ * Add secondary FCoE MAC address filter for our OUI.
+ */
+static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
+{
+ struct fcoe_port *port = lport_priv(lport);
+ struct fcoe_interface *fcoe = port->priv;
+
+ if (!is_zero_ether_addr(port->data_src_addr))
+ dev_uc_del(fcoe->netdev, port->data_src_addr);
+ if (!is_zero_ether_addr(addr))
+ dev_uc_add(fcoe->netdev, addr);
+ memcpy(port->data_src_addr, addr, ETH_ALEN);
+}
+
+/**
+ * fcoe_get_src_mac() - return the Ethernet source address for an lport
+ * @lport: libfc lport
+ */
+static u8 *fcoe_get_src_mac(struct fc_lport *lport)
+{
+ struct fcoe_port *port = lport_priv(lport);
+
+ return port->data_src_addr;
+}
+
+/**
+ * fcoe_lport_config() - Set up a local port
+ * @lport: The local port to be setup
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_lport_config(struct fc_lport *lport)
+{
+ lport->link_up = 0;
+ lport->qfull = 0;
+ lport->max_retry_count = 3;
+ lport->max_rport_retry_count = 3;
+ lport->e_d_tov = fcoe_e_d_tov;
+ lport->r_a_tov = fcoe_r_a_tov;
+ lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
+ FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
+ lport->does_npiv = 1;
+
+ fc_lport_init_stats(lport);
+
+ /* lport fc_lport related configuration */
+ fc_lport_config(lport);
+
+ /* offload related configuration */
+ lport->crc_offload = 0;
+ lport->seq_offload = 0;
+ lport->lro_enabled = 0;
+ lport->lro_xid = 0;
+ lport->lso_max = 0;
+
+ return 0;
+}
+
+/**
+ * fcoe_netdev_features_change - Updates the lport's offload flags based
+ * on the LLD netdev's FCoE feature flags
+ */
+static void fcoe_netdev_features_change(struct fc_lport *lport,
+ struct net_device *netdev)
+{
+ mutex_lock(&lport->lp_mutex);
+
+ if (netdev->features & NETIF_F_SG)
+ lport->sg_supp = 1;
+ else
+ lport->sg_supp = 0;
+
+ if (netdev->features & NETIF_F_FCOE_CRC) {
+ lport->crc_offload = 1;
+ FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
+ } else {
+ lport->crc_offload = 0;
+ }
+
+ if (netdev->features & NETIF_F_FSO) {
+ lport->seq_offload = 1;
+ lport->lso_max = netdev->gso_max_size;
+ FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
+ lport->lso_max);
+ } else {
+ lport->seq_offload = 0;
+ lport->lso_max = 0;
+ }
+
+ if (netdev->fcoe_ddp_xid) {
+ lport->lro_enabled = 1;
+ lport->lro_xid = netdev->fcoe_ddp_xid;
+ FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
+ lport->lro_xid);
+ } else {
+ lport->lro_enabled = 0;
+ lport->lro_xid = 0;
+ }
+
+ mutex_unlock(&lport->lp_mutex);
+}
+
+/**
+ * fcoe_netdev_config() - Set up net devive for SW FCoE
+ * @lport: The local port that is associated with the net device
+ * @netdev: The associated net device
+ *
+ * Must be called after fcoe_lport_config() as it will use local port mutex
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
+{
+ u32 mfs;
+ u64 wwnn, wwpn;
+ struct fcoe_interface *fcoe;
+ struct fcoe_ctlr *ctlr;
+ struct fcoe_port *port;
+
+ /* Setup lport private data to point to fcoe softc */
+ port = lport_priv(lport);
+ fcoe = port->priv;
+ ctlr = fcoe_to_ctlr(fcoe);
+
+ /* Figure out the VLAN ID, if any */
+ if (is_vlan_dev(netdev))
+ lport->vlan = vlan_dev_vlan_id(netdev);
+ else
+ lport->vlan = 0;
+
+ /*
+ * Determine max frame size based on underlying device and optional
+ * user-configured limit. If the MFS is too low, fcoe_link_ok()
+ * will return 0, so do this first.
+ */
+ mfs = netdev->mtu;
+ if (netdev->features & NETIF_F_FCOE_MTU) {
+ mfs = FCOE_MTU;
+ FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
+ }
+ mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
+ if (fc_set_mfs(lport, mfs))
+ return -EINVAL;
+
+ /* offload features support */
+ fcoe_netdev_features_change(lport, netdev);
+
+ skb_queue_head_init(&port->fcoe_pending_queue);
+ port->fcoe_pending_queue_active = 0;
+ timer_setup(&port->timer, fcoe_queue_timer, 0);
+
+ fcoe_link_speed_update(lport);
+
+ if (!lport->vport) {
+ if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
+ wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0);
+ fc_set_wwnn(lport, wwnn);
+ if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
+ wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
+ 2, 0);
+ fc_set_wwpn(lport, wwpn);
+ }
+
+ return 0;
+}
+
+/**
+ * fcoe_shost_config() - Set up the SCSI host associated with a local port
+ * @lport: The local port
+ * @dev: The device associated with the SCSI host
+ *
+ * Must be called after fcoe_lport_config() and fcoe_netdev_config()
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
+{
+ int rc = 0;
+
+ /* lport scsi host config */
+ lport->host->max_lun = FCOE_MAX_LUN;
+ lport->host->max_id = FCOE_MAX_FCP_TARGET;
+ lport->host->max_channel = 0;
+ lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
+
+ if (lport->vport)
+ lport->host->transportt = fcoe_vport_scsi_transport;
+ else
+ lport->host->transportt = fcoe_nport_scsi_transport;
+
+ /* add the new host to the SCSI-ml */
+ rc = scsi_add_host(lport->host, dev);
+ if (rc) {
+ FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
+ "error on scsi_add_host\n");
+ return rc;
+ }
+
+ if (!lport->vport)
+ fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
+
+ snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
+ "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
+ fcoe_netdev(lport)->name);
+
+ return 0;
+}
+
+
+/**
+ * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE
+ * @lport: The local port that is associated with the net device
+ * @netdev: The associated net device
+ *
+ * Must be called after fcoe_shost_config() as it will use local port mutex
+ *
+ */
+static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)
+{
+ struct fcoe_interface *fcoe;
+ struct fcoe_port *port;
+ struct net_device *realdev;
+ int rc;
+
+ port = lport_priv(lport);
+ fcoe = port->priv;
+ realdev = fcoe->realdev;
+
+ /* No FDMI state m/c for NPIV ports */
+ if (lport->vport)
+ return;
+
+ if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {
+ struct netdev_fcoe_hbainfo *fdmi;
+ fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL);
+ if (!fdmi)
+ return;
+
+ rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,
+ fdmi);
+ if (rc) {
+ printk(KERN_INFO "fcoe: Failed to retrieve FDMI "
+ "information from netdev.\n");
+ return;
+ }
+
+ snprintf(fc_host_serial_number(lport->host),
+ FC_SERIAL_NUMBER_SIZE,
+ "%s",
+ fdmi->serial_number);
+ snprintf(fc_host_manufacturer(lport->host),
+ FC_SERIAL_NUMBER_SIZE,
+ "%s",
+ fdmi->manufacturer);
+ snprintf(fc_host_model(lport->host),
+ FC_SYMBOLIC_NAME_SIZE,
+ "%s",
+ fdmi->model);
+ snprintf(fc_host_model_description(lport->host),
+ FC_SYMBOLIC_NAME_SIZE,
+ "%s",
+ fdmi->model_description);
+ snprintf(fc_host_hardware_version(lport->host),
+ FC_VERSION_STRING_SIZE,
+ "%s",
+ fdmi->hardware_version);
+ snprintf(fc_host_driver_version(lport->host),
+ FC_VERSION_STRING_SIZE,
+ "%s",
+ fdmi->driver_version);
+ snprintf(fc_host_optionrom_version(lport->host),
+ FC_VERSION_STRING_SIZE,
+ "%s",
+ fdmi->optionrom_version);
+ snprintf(fc_host_firmware_version(lport->host),
+ FC_VERSION_STRING_SIZE,
+ "%s",
+ fdmi->firmware_version);
+
+ /* Enable FDMI lport states */
+ lport->fdmi_enabled = 1;
+ kfree(fdmi);
+ } else {
+ lport->fdmi_enabled = 0;
+ printk(KERN_INFO "fcoe: No FDMI support.\n");
+ }
+}
+
+/**
+ * fcoe_oem_match() - The match routine for the offloaded exchange manager
+ * @fp: The I/O frame
+ *
+ * This routine will be associated with an exchange manager (EM). When
+ * the libfc exchange handling code is looking for an EM to use it will
+ * call this routine and pass it the frame that it wishes to send. This
+ * routine will return True if the associated EM is to be used and False
+ * if the echange code should continue looking for an EM.
+ *
+ * The offload EM that this routine is associated with will handle any
+ * packets that are for SCSI read requests.
+ *
+ * This has been enhanced to work when FCoE stack is operating in target
+ * mode.
+ *
+ * Returns: True for read types I/O, otherwise returns false.
+ */
+static bool fcoe_oem_match(struct fc_frame *fp)
+{
+ struct fc_frame_header *fh = fc_frame_header_get(fp);
+ struct fcp_cmnd *fcp;
+
+ if (fc_fcp_is_read(fr_fsp(fp)) &&
+ (fr_fsp(fp)->data_len > fcoe_ddp_min))
+ return true;
+ else if ((fr_fsp(fp) == NULL) &&
+ (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&
+ (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
+ fcp = fc_frame_payload_get(fp, sizeof(*fcp));
+ if ((fcp->fc_flags & FCP_CFL_WRDATA) &&
+ (ntohl(fcp->fc_dl) > fcoe_ddp_min))
+ return true;
+ }
+ return false;
+}
+
+/**
+ * fcoe_em_config() - Allocate and configure an exchange manager
+ * @lport: The local port that the new EM will be associated with
+ *
+ * Returns: 0 on success
+ */
+static inline int fcoe_em_config(struct fc_lport *lport)
+{
+ struct fcoe_port *port = lport_priv(lport);
+ struct fcoe_interface *fcoe = port->priv;
+ struct fcoe_interface *oldfcoe = NULL;
+ struct net_device *old_real_dev, *cur_real_dev;
+ u16 min_xid = FCOE_MIN_XID;
+ u16 max_xid = FCOE_MAX_XID;
+
+ /*
+ * Check if need to allocate an em instance for
+ * offload exchange ids to be shared across all VN_PORTs/lport.
+ */
+ if (!lport->lro_enabled || !lport->lro_xid ||
+ (lport->lro_xid >= max_xid)) {
+ lport->lro_xid = 0;
+ goto skip_oem;
+ }
+
+ /*
+ * Reuse existing offload em instance in case
+ * it is already allocated on real eth device
+ */
+ if (is_vlan_dev(fcoe->netdev))
+ cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
+ else
+ cur_real_dev = fcoe->netdev;
+
+ list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
+ if (is_vlan_dev(oldfcoe->netdev))
+ old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
+ else
+ old_real_dev = oldfcoe->netdev;
+
+ if (cur_real_dev == old_real_dev) {
+ fcoe->oem = oldfcoe->oem;
+ break;
+ }
+ }
+
+ if (fcoe->oem) {
+ if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
+ printk(KERN_ERR "fcoe_em_config: failed to add "
+ "offload em:%p on interface:%s\n",
+ fcoe->oem, fcoe->netdev->name);
+ return -ENOMEM;
+ }
+ } else {
+ fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
+ FCOE_MIN_XID, lport->lro_xid,
+ fcoe_oem_match);
+ if (!fcoe->oem) {
+ printk(KERN_ERR "fcoe_em_config: failed to allocate "
+ "em for offload exches on interface:%s\n",
+ fcoe->netdev->name);
+ return -ENOMEM;
+ }
+ }
+
+ /*
+ * Exclude offload EM xid range from next EM xid range.
+ */
+ min_xid += lport->lro_xid + 1;
+
+skip_oem:
+ if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
+ printk(KERN_ERR "fcoe_em_config: failed to "
+ "allocate em on interface %s\n", fcoe->netdev->name);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+/**
+ * fcoe_if_destroy() - Tear down a SW FCoE instance
+ * @lport: The local port to be destroyed
+ *
+ * Locking: Must be called with the RTNL mutex held.
+ *
+ */
+static void fcoe_if_destroy(struct fc_lport *lport)
+{
+ struct fcoe_port *port = lport_priv(lport);
+ struct fcoe_interface *fcoe = port->priv;
+ struct net_device *netdev = fcoe->netdev;
+
+ FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
+
+ /* Logout of the fabric */
+ fc_fabric_logoff(lport);
+
+ /* Cleanup the fc_lport */
+ fc_lport_destroy(lport);
+
+ /* Stop the transmit retry timer */
+ del_timer_sync(&port->timer);
+
+ /* Free existing transmit skbs */
+ fcoe_clean_pending_queue(lport);
+
+ if (!is_zero_ether_addr(port->data_src_addr))
+ dev_uc_del(netdev, port->data_src_addr);
+ if (lport->vport)
+ synchronize_net();
+ else
+ fcoe_interface_remove(fcoe);
+
+ /* Free queued packets for the per-CPU receive threads */
+ fcoe_percpu_clean(lport);
+
+ /* Detach from the scsi-ml */
+ fc_remove_host(lport->host);
+ scsi_remove_host(lport->host);
+
+ /* Destroy lport scsi_priv */
+ fc_fcp_destroy(lport);
+
+ /* There are no more rports or I/O, free the EM */
+ fc_exch_mgr_free(lport);
+
+ /* Free memory used by statistical counters */
+ fc_lport_free_stats(lport);
+
+ /*
+ * Release the Scsi_Host for vport but hold on to
+ * master lport until it fcoe interface fully cleaned-up.
+ */
+ if (lport->vport)
+ scsi_host_put(lport->host);
+}
+
+/**
+ * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
+ * @lport: The local port to setup DDP for
+ * @xid: The exchange ID for this DDP transfer
+ * @sgl: The scatterlist describing this transfer
+ * @sgc: The number of sg items
+ *
+ * Returns: 0 if the DDP context was not configured
+ */
+static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
+ struct scatterlist *sgl, unsigned int sgc)
+{
+ struct net_device *netdev = fcoe_netdev(lport);
+
+ if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
+ return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
+ xid, sgl,
+ sgc);
+
+ return 0;
+}
+
+/**
+ * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
+ * @lport: The local port to setup DDP for
+ * @xid: The exchange ID for this DDP transfer
+ * @sgl: The scatterlist describing this transfer
+ * @sgc: The number of sg items
+ *
+ * Returns: 0 if the DDP context was not configured
+ */
+static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
+ struct scatterlist *sgl, unsigned int sgc)
+{
+ struct net_device *netdev = fcoe_netdev(lport);
+
+ if (netdev->netdev_ops->ndo_fcoe_ddp_target)
+ return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
+ sgl, sgc);
+
+ return 0;
+}
+
+
+/**
+ * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
+ * @lport: The local port to complete DDP on
+ * @xid: The exchange ID for this DDP transfer
+ *
+ * Returns: the length of data that have been completed by DDP
+ */
+static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
+{
+ struct net_device *netdev = fcoe_netdev(lport);
+
+ if (netdev->netdev_ops->ndo_fcoe_ddp_done)
+ return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
+ return 0;
+}
+
+/**
+ * fcoe_if_create() - Create a FCoE instance on an interface
+ * @fcoe: The FCoE interface to create a local port on
+ * @parent: The device pointer to be the parent in sysfs for the SCSI host
+ * @npiv: Indicates if the port is a vport or not
+ *
+ * Creates a fc_lport instance and a Scsi_Host instance and configure them.
+ *
+ * Returns: The allocated fc_lport or an error pointer
+ */
+static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
+ struct device *parent, int npiv)
+{
+ struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
+ struct net_device *netdev = fcoe->netdev;
+ struct fc_lport *lport, *n_port;
+ struct fcoe_port *port;
+ struct Scsi_Host *shost;
+ int rc;
+ /*
+ * parent is only a vport if npiv is 1,
+ * but we'll only use vport in that case so go ahead and set it
+ */
+ struct fc_vport *vport = dev_to_vport(parent);
+
+ FCOE_NETDEV_DBG(netdev, "Create Interface\n");
+
+ if (!npiv)
+ lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
+ else
+ lport = libfc_vport_create(vport, sizeof(*port));
+
+ if (!lport) {
+ FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
+ rc = -ENOMEM;
+ goto out;
+ }
+ port = lport_priv(lport);
+ port->lport = lport;
+ port->priv = fcoe;
+ port->get_netdev = fcoe_netdev;
+ port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
+ port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
+ INIT_WORK(&port->destroy_work, fcoe_destroy_work);
+
+ /*
+ * Need to add the lport to the hostlist
+ * so we catch NETDEV_CHANGE events.
+ */
+ fcoe_hostlist_add(lport);
+
+ /* configure a fc_lport including the exchange manager */
+ rc = fcoe_lport_config(lport);
+ if (rc) {
+ FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
+ "interface\n");
+ goto out_host_put;
+ }
+
+ if (npiv) {
+ FCOE_NETDEV_DBG(netdev, "Setting vport names, "
+ "%16.16llx %16.16llx\n",
+ vport->node_name, vport->port_name);
+ fc_set_wwnn(lport, vport->node_name);
+ fc_set_wwpn(lport, vport->port_name);
+ }
+
+ /* configure lport network properties */
+ rc = fcoe_netdev_config(lport, netdev);
+ if (rc) {
+ FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
+ "interface\n");
+ goto out_lp_destroy;
+ }
+
+ /* configure lport scsi host properties */
+ rc = fcoe_shost_config(lport, parent);
+ if (rc) {
+ FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
+ "interface\n");
+ goto out_lp_destroy;
+ }
+
+ /* Initialize the library */
+ rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1);
+ if (rc) {
+ FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
+ "interface\n");
+ goto out_lp_destroy;
+ }
+
+ /* Initialized FDMI information */
+ fcoe_fdmi_info(lport, netdev);
+
+ /*
+ * fcoe_em_alloc() and fcoe_hostlist_add() both
+ * need to be atomic with respect to other changes to the
+ * hostlist since fcoe_em_alloc() looks for an existing EM
+ * instance on host list updated by fcoe_hostlist_add().
+ *
+ * This is currently handled through the fcoe_config_mutex
+ * begin held.
+ */
+ if (!npiv)
+ /* lport exch manager allocation */
+ rc = fcoe_em_config(lport);
+ else {
+ shost = vport_to_shost(vport);
+ n_port = shost_priv(shost);
+ rc = fc_exch_mgr_list_clone(n_port, lport);
+ }
+
+ if (rc) {
+ FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
+ goto out_lp_destroy;
+ }
+
+ return lport;
+
+out_lp_destroy:
+ fc_exch_mgr_free(lport);
+out_host_put:
+ fcoe_hostlist_del(lport);
+ scsi_host_put(lport->host);
+out:
+ return ERR_PTR(rc);
+}
+
+/**
+ * fcoe_if_init() - Initialization routine for fcoe.ko
+ *
+ * Attaches the SW FCoE transport to the FC transport
+ *
+ * Returns: 0 on success
+ */
+static int __init fcoe_if_init(void)
+{
+ /* attach to scsi transport */
+ fcoe_nport_scsi_transport =
+ fc_attach_transport(&fcoe_nport_fc_functions);
+ fcoe_vport_scsi_transport =
+ fc_attach_transport(&fcoe_vport_fc_functions);
+
+ if (!fcoe_nport_scsi_transport) {
+ printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/**
+ * fcoe_if_exit() - Tear down fcoe.ko
+ *
+ * Detaches the SW FCoE transport from the FC transport
+ *
+ * Returns: 0 on success
+ */
+static int __exit fcoe_if_exit(void)
+{
+ fc_release_transport(fcoe_nport_scsi_transport);
+ fc_release_transport(fcoe_vport_scsi_transport);
+ fcoe_nport_scsi_transport = NULL;
+ fcoe_vport_scsi_transport = NULL;
+ return 0;
+}
+
+static void fcoe_thread_cleanup_local(unsigned int cpu)
+{
+ struct page *crc_eof;
+ struct fcoe_percpu_s *p;
+
+ p = per_cpu_ptr(&fcoe_percpu, cpu);
+ spin_lock_bh(&p->fcoe_rx_list.lock);
+ crc_eof = p->crc_eof_page;
+ p->crc_eof_page = NULL;
+ p->crc_eof_offset = 0;
+ spin_unlock_bh(&p->fcoe_rx_list.lock);
+
+ if (crc_eof)
+ put_page(crc_eof);
+ flush_work(&p->work);
+}
+
+/**
+ * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
+ * command.
+ *
+ * This routine selects next CPU based on cpumask to distribute
+ * incoming requests in round robin.
+ *
+ * Returns: int CPU number
+ */
+static inline unsigned int fcoe_select_cpu(void)
+{
+ static unsigned int selected_cpu;
+
+ selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
+ if (selected_cpu >= nr_cpu_ids)
+ selected_cpu = cpumask_first(cpu_online_mask);
+
+ return selected_cpu;
+}
+
+/**
+ * fcoe_rcv() - Receive packets from a net device
+ * @skb: The received packet
+ * @netdev: The net device that the packet was received on
+ * @ptype: The packet type context
+ * @olddev: The last device net device
+ *
+ * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
+ * FC frame and passes the frame to libfc.
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
+ struct packet_type *ptype, struct net_device *olddev)
+{
+ struct fc_lport *lport;
+ struct fcoe_rcv_info *fr;
+ struct fcoe_ctlr *ctlr;
+ struct fcoe_interface *fcoe;
+ struct fc_frame_header *fh;
+ struct fcoe_percpu_s *fps;
+ struct ethhdr *eh;
+ unsigned int cpu;
+
+ fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
+ ctlr = fcoe_to_ctlr(fcoe);
+ lport = ctlr->lp;
+ if (unlikely(!lport)) {
+ FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n");
+ goto err2;
+ }
+ if (!lport->link_up)
+ goto err2;
+
+ FCOE_NETDEV_DBG(netdev,
+ "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
+ skb->len, skb->data_len, skb->head, skb->data,
+ skb_tail_pointer(skb), skb_end_pointer(skb),
+ skb->csum, skb->dev ? skb->dev->name : "<NULL>");
+
+
+ skb = skb_share_check(skb, GFP_ATOMIC);
+
+ if (skb == NULL)
+ return NET_RX_DROP;
+
+ eh = eth_hdr(skb);
+
+ if (is_fip_mode(ctlr) &&
+ !ether_addr_equal(eh->h_source, ctlr->dest_addr)) {
+ FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
+ eh->h_source);
+ goto err;
+ }
+
+ /*
+ * Check for minimum frame length, and make sure required FCoE
+ * and FC headers are pulled into the linear data area.
+ */
+ if (unlikely((skb->len < FCOE_MIN_FRAME) ||
+ !pskb_may_pull(skb, FCOE_HEADER_LEN)))
+ goto err;
+
+ skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
+ fh = (struct fc_frame_header *) skb_transport_header(skb);
+
+ if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
+ FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
+ eh->h_dest);
+ goto err;
+ }
+
+ fr = fcoe_dev_from_skb(skb);
+ fr->fr_dev = lport;
+
+ /*
+ * In case the incoming frame's exchange is originated from
+ * the initiator, then received frame's exchange id is ANDed
+ * with fc_cpu_mask bits to get the same cpu on which exchange
+ * was originated, otherwise select cpu using rx exchange id
+ * or fcoe_select_cpu().
+ */
+ if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
+ cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
+ else {
+ if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
+ cpu = fcoe_select_cpu();
+ else
+ cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
+ }
+
+ if (cpu >= nr_cpu_ids)
+ goto err;
+
+ fps = &per_cpu(fcoe_percpu, cpu);
+ spin_lock(&fps->fcoe_rx_list.lock);
+ /*
+ * We now have a valid CPU that we're targeting for
+ * this skb. We also have this receive thread locked,
+ * so we're free to queue skbs into it's queue.
+ */
+
+ /*
+ * Note: We used to have a set of conditions under which we would
+ * call fcoe_recv_frame directly, rather than queuing to the rx list
+ * as it could save a few cycles, but doing so is prohibited, as
+ * fcoe_recv_frame has several paths that may sleep, which is forbidden
+ * in softirq context.
+ */
+ __skb_queue_tail(&fps->fcoe_rx_list, skb);
+ schedule_work_on(cpu, &fps->work);
+ spin_unlock(&fps->fcoe_rx_list.lock);
+
+ return NET_RX_SUCCESS;
+err:
+ per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++;
+ put_cpu();
+err2:
+ kfree_skb(skb);
+ return NET_RX_DROP;
+}
+
+/**
+ * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
+ * @skb: The packet to be transmitted
+ * @tlen: The total length of the trailer
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
+{
+ struct fcoe_percpu_s *fps;
+ int rc;
+
+ fps = &get_cpu_var(fcoe_percpu);
+ rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
+ put_cpu_var(fcoe_percpu);
+
+ return rc;
+}
+
+/**
+ * fcoe_xmit() - Transmit a FCoE frame
+ * @lport: The local port that the frame is to be transmitted for
+ * @fp: The frame to be transmitted
+ *
+ * Return: 0 for success
+ */
+static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
+{
+ int wlen;
+ u32 crc;
+ struct ethhdr *eh;
+ struct fcoe_crc_eof *cp;
+ struct sk_buff *skb;
+ struct fc_stats *stats;
+ struct fc_frame_header *fh;
+ unsigned int hlen; /* header length implies the version */
+ unsigned int tlen; /* trailer length */
+ unsigned int elen; /* eth header, may include vlan */
+ struct fcoe_port *port = lport_priv(lport);
+ struct fcoe_interface *fcoe = port->priv;
+ struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
+ u8 sof, eof;
+ struct fcoe_hdr *hp;
+
+ WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
+
+ fh = fc_frame_header_get(fp);
+ skb = fp_skb(fp);
+ wlen = skb->len / FCOE_WORD_TO_BYTE;
+
+ if (!lport->link_up) {
+ kfree_skb(skb);
+ return 0;
+ }
+
+ if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
+ fcoe_ctlr_els_send(ctlr, lport, skb))
+ return 0;
+
+ sof = fr_sof(fp);
+ eof = fr_eof(fp);
+
+ elen = sizeof(struct ethhdr);
+ hlen = sizeof(struct fcoe_hdr);
+ tlen = sizeof(struct fcoe_crc_eof);
+ wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
+
+ /* crc offload */
+ if (likely(lport->crc_offload)) {
+ skb->ip_summed = CHECKSUM_PARTIAL;
+ skb->csum_start = skb_headroom(skb);
+ skb->csum_offset = skb->len;
+ crc = 0;
+ } else {
+ skb->ip_summed = CHECKSUM_NONE;
+ crc = fcoe_fc_crc(fp);
+ }
+
+ /* copy port crc and eof to the skb buff */
+ if (skb_is_nonlinear(skb)) {
+ skb_frag_t *frag;
+ if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
+ kfree_skb(skb);
+ return -ENOMEM;
+ }
+ frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
+ cp = kmap_atomic(skb_frag_page(frag))
+ + frag->page_offset;
+ } else {
+ cp = skb_put(skb, tlen);
+ }
+
+ memset(cp, 0, sizeof(*cp));
+ cp->fcoe_eof = eof;
+ cp->fcoe_crc32 = cpu_to_le32(~crc);
+
+ if (skb_is_nonlinear(skb)) {
+ kunmap_atomic(cp);
+ cp = NULL;
+ }
+
+ /* adjust skb network/transport offsets to match mac/fcoe/port */
+ skb_push(skb, elen + hlen);
+ skb_reset_mac_header(skb);
+ skb_reset_network_header(skb);
+ skb->mac_len = elen;
+ skb->protocol = htons(ETH_P_FCOE);
+ skb->priority = fcoe->priority;
+
+ if (is_vlan_dev(fcoe->netdev) &&
+ fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) {
+ /* must set skb->dev before calling vlan_put_tag */
+ skb->dev = fcoe->realdev;
+ __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
+ vlan_dev_vlan_id(fcoe->netdev));
+ } else
+ skb->dev = fcoe->netdev;
+
+ /* fill up mac and fcoe headers */
+ eh = eth_hdr(skb);
+ eh->h_proto = htons(ETH_P_FCOE);
+ memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);
+ if (ctlr->map_dest)
+ memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
+
+ if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))
+ memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);
+ else
+ memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
+
+ hp = (struct fcoe_hdr *)(eh + 1);
+ memset(hp, 0, sizeof(*hp));
+ if (FC_FCOE_VER)
+ FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
+ hp->fcoe_sof = sof;
+
+ /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
+ if (lport->seq_offload && fr_max_payload(fp)) {
+ skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
+ skb_shinfo(skb)->gso_size = fr_max_payload(fp);
+ } else {
+ skb_shinfo(skb)->gso_type = 0;
+ skb_shinfo(skb)->gso_size = 0;
+ }
+ /* update tx stats: regardless if LLD fails */
+ stats = per_cpu_ptr(lport->stats, get_cpu());
+ stats->TxFrames++;
+ stats->TxWords += wlen;
+ put_cpu();
+
+ /* send down to lld */
+ fr_dev(fp) = lport;
+ fcoe_port_send(port, skb);
+ return 0;
+}
+
+/**
+ * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
+ * @lport: The local port the frame was received on
+ * @fp: The received frame
+ *
+ * Return: 0 on passing filtering checks
+ */
+static inline int fcoe_filter_frames(struct fc_lport *lport,
+ struct fc_frame *fp)
+{
+ struct fcoe_ctlr *ctlr;
+ struct fcoe_interface *fcoe;
+ struct fc_frame_header *fh;
+ struct sk_buff *skb = (struct sk_buff *)fp;
+ struct fc_stats *stats;
+
+ /*
+ * We only check CRC if no offload is available and if it is
+ * it's solicited data, in which case, the FCP layer would
+ * check it during the copy.
+ */
+ if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
+ fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
+ else
+ fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
+
+ fh = (struct fc_frame_header *) skb_transport_header(skb);
+ fh = fc_frame_header_get(fp);
+ if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
+ return 0;
+
+ fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
+ ctlr = fcoe_to_ctlr(fcoe);
+ if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
+ ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
+ FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
+ return -EINVAL;
+ }
+
+ if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
+ le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
+ fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
+ return 0;
+ }
+
+ stats = per_cpu_ptr(lport->stats, get_cpu());
+ stats->InvalidCRCCount++;
+ if (stats->InvalidCRCCount < 5)
+ printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
+ put_cpu();
+ return -EINVAL;
+}
+
+/**
+ * fcoe_recv_frame() - process a single received frame
+ * @skb: frame to process
+ */
+static void fcoe_recv_frame(struct sk_buff *skb)
+{
+ u32 fr_len;
+ struct fc_lport *lport;
+ struct fcoe_rcv_info *fr;
+ struct fc_stats *stats;
+ struct fcoe_crc_eof crc_eof;
+ struct fc_frame *fp;
+ struct fcoe_port *port;
+ struct fcoe_hdr *hp;
+
+ fr = fcoe_dev_from_skb(skb);
+ lport = fr->fr_dev;
+ if (unlikely(!lport)) {
+ FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n");
+ kfree_skb(skb);
+ return;
+ }
+
+ FCOE_NETDEV_DBG(skb->dev,
+ "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
+ skb->len, skb->data_len,
+ skb->head, skb->data, skb_tail_pointer(skb),
+ skb_end_pointer(skb), skb->csum,
+ skb->dev ? skb->dev->name : "<NULL>");
+
+ port = lport_priv(lport);
+ skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */
+
+ /*
+ * Frame length checks and setting up the header pointers
+ * was done in fcoe_rcv already.
+ */
+ hp = (struct fcoe_hdr *) skb_network_header(skb);
+
+ stats = per_cpu_ptr(lport->stats, get_cpu());
+ if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
+ if (stats->ErrorFrames < 5)
+ printk(KERN_WARNING "fcoe: FCoE version "
+ "mismatch: The frame has "
+ "version %x, but the "
+ "initiator supports version "
+ "%x\n", FC_FCOE_DECAPS_VER(hp),
+ FC_FCOE_VER);
+ goto drop;
+ }
+
+ skb_pull(skb, sizeof(struct fcoe_hdr));
+ fr_len = skb->len - sizeof(struct fcoe_crc_eof);
+
+ stats->RxFrames++;
+ stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
+
+ fp = (struct fc_frame *)skb;
+ fc_frame_init(fp);
+ fr_dev(fp) = lport;
+ fr_sof(fp) = hp->fcoe_sof;
+
+ /* Copy out the CRC and EOF trailer for access */
+ if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
+ goto drop;
+ fr_eof(fp) = crc_eof.fcoe_eof;
+ fr_crc(fp) = crc_eof.fcoe_crc32;
+ if (pskb_trim(skb, fr_len))
+ goto drop;
+
+ if (!fcoe_filter_frames(lport, fp)) {
+ put_cpu();
+ fc_exch_recv(lport, fp);
+ return;
+ }
+drop:
+ stats->ErrorFrames++;
+ put_cpu();
+ kfree_skb(skb);
+}
+
+/**
+ * fcoe_receive_work() - The per-CPU worker
+ * @work: The work struct
+ *
+ */
+static void fcoe_receive_work(struct work_struct *work)
+{
+ struct fcoe_percpu_s *p;
+ struct sk_buff *skb;
+ struct sk_buff_head tmp;
+
+ p = container_of(work, struct fcoe_percpu_s, work);
+ skb_queue_head_init(&tmp);
+
+ spin_lock_bh(&p->fcoe_rx_list.lock);
+ skb_queue_splice_init(&p->fcoe_rx_list, &tmp);
+ spin_unlock_bh(&p->fcoe_rx_list.lock);
+
+ if (!skb_queue_len(&tmp))
+ return;
+
+ while ((skb = __skb_dequeue(&tmp)))
+ fcoe_recv_frame(skb);
+}
+
+/**
+ * fcoe_dev_setup() - Setup the link change notification interface
+ */
+static void fcoe_dev_setup(void)
+{
+ register_dcbevent_notifier(&dcb_notifier);
+ register_netdevice_notifier(&fcoe_notifier);
+}
+
+/**
+ * fcoe_dev_cleanup() - Cleanup the link change notification interface
+ */
+static void fcoe_dev_cleanup(void)
+{
+ unregister_dcbevent_notifier(&dcb_notifier);
+ unregister_netdevice_notifier(&fcoe_notifier);
+}
+
+static struct fcoe_interface *
+fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)
+{
+ struct fcoe_interface *fcoe;
+ struct net_device *real_dev;
+
+ list_for_each_entry(fcoe, &fcoe_hostlist, list) {
+ if (is_vlan_dev(fcoe->netdev))
+ real_dev = vlan_dev_real_dev(fcoe->netdev);
+ else
+ real_dev = fcoe->netdev;
+
+ if (netdev == real_dev)
+ return fcoe;
+ }
+ return NULL;
+}
+
+static int fcoe_dcb_app_notification(struct notifier_block *notifier,
+ ulong event, void *ptr)
+{
+ struct dcb_app_type *entry = ptr;
+ struct fcoe_ctlr *ctlr;
+ struct fcoe_interface *fcoe;
+ struct net_device *netdev;
+ int prio;
+
+ if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)
+ return NOTIFY_OK;
+
+ netdev = dev_get_by_index(&init_net, entry->ifindex);
+ if (!netdev)
+ return NOTIFY_OK;
+
+ fcoe = fcoe_hostlist_lookup_realdev_port(netdev);
+ dev_put(netdev);
+ if (!fcoe)
+ return NOTIFY_OK;
+
+ ctlr = fcoe_to_ctlr(fcoe);
+
+ if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
+ prio = ffs(entry->app.priority) - 1;
+ else
+ prio = entry->app.priority;
+
+ if (prio < 0)
+ return NOTIFY_OK;
+
+ if (entry->app.protocol == ETH_P_FIP ||
+ entry->app.protocol == ETH_P_FCOE)
+ ctlr->priority = prio;
+
+ if (entry->app.protocol == ETH_P_FCOE)
+ fcoe->priority = prio;
+
+ return NOTIFY_OK;
+}
+
+/**
+ * fcoe_device_notification() - Handler for net device events
+ * @notifier: The context of the notification
+ * @event: The type of event
+ * @ptr: The net device that the event was on
+ *
+ * This function is called by the Ethernet driver in case of link change event.
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_device_notification(struct notifier_block *notifier,
+ ulong event, void *ptr)
+{
+ struct fcoe_ctlr_device *cdev;
+ struct fc_lport *lport = NULL;
+ struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
+ struct fcoe_ctlr *ctlr;
+ struct fcoe_interface *fcoe;
+ struct fcoe_port *port;
+ struct fc_stats *stats;
+ u32 link_possible = 1;
+ u32 mfs;
+ int rc = NOTIFY_OK;
+
+ list_for_each_entry(fcoe, &fcoe_hostlist, list) {
+ if (fcoe->netdev == netdev) {
+ ctlr = fcoe_to_ctlr(fcoe);
+ lport = ctlr->lp;
+ break;
+ }
+ }
+ if (!lport) {
+ rc = NOTIFY_DONE;
+ goto out;
+ }
+
+ switch (event) {
+ case NETDEV_DOWN:
+ case NETDEV_GOING_DOWN:
+ link_possible = 0;
+ break;
+ case NETDEV_UP:
+ case NETDEV_CHANGE:
+ break;
+ case NETDEV_CHANGEMTU:
+ if (netdev->features & NETIF_F_FCOE_MTU)
+ break;
+ mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
+ sizeof(struct fcoe_crc_eof));
+ if (mfs >= FC_MIN_MAX_FRAME)
+ fc_set_mfs(lport, mfs);
+ break;
+ case NETDEV_REGISTER:
+ break;
+ case NETDEV_UNREGISTER:
+ list_del(&fcoe->list);
+ port = lport_priv(ctlr->lp);
+ fcoe_vport_remove(lport);
+ mutex_lock(&fcoe_config_mutex);
+ fcoe_if_destroy(lport);
+ if (!fcoe->removed)
+ fcoe_interface_remove(fcoe);
+ fcoe_interface_cleanup(fcoe);
+ mutex_unlock(&fcoe_config_mutex);
+ fcoe_ctlr_device_delete(fcoe_ctlr_to_ctlr_dev(ctlr));
+ goto out;
+ break;
+ case NETDEV_FEAT_CHANGE:
+ fcoe_netdev_features_change(lport, netdev);
+ break;
+ default:
+ FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
+ "from netdev netlink\n", event);
+ }
+
+ fcoe_link_speed_update(lport);
+
+ cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
+
+ if (link_possible && !fcoe_link_ok(lport)) {
+ switch (cdev->enabled) {
+ case FCOE_CTLR_DISABLED:
+ pr_info("Link up while interface is disabled.\n");
+ break;
+ case FCOE_CTLR_ENABLED:
+ case FCOE_CTLR_UNUSED:
+ fcoe_ctlr_link_up(ctlr);
+ };
+ } else if (fcoe_ctlr_link_down(ctlr)) {
+ switch (cdev->enabled) {
+ case FCOE_CTLR_DISABLED:
+ pr_info("Link down while interface is disabled.\n");
+ break;
+ case FCOE_CTLR_ENABLED:
+ case FCOE_CTLR_UNUSED:
+ stats = per_cpu_ptr(lport->stats, get_cpu());
+ stats->LinkFailureCount++;
+ put_cpu();
+ fcoe_clean_pending_queue(lport);
+ };
+ }
+out:
+ return rc;
+}
+
+/**
+ * fcoe_disable() - Disables a FCoE interface
+ * @netdev : The net_device object the Ethernet interface to create on
+ *
+ * Called from fcoe transport.
+ *
+ * Returns: 0 for success
+ *
+ * Deprecated: use fcoe_ctlr_enabled()
+ */
+static int fcoe_disable(struct net_device *netdev)
+{
+ struct fcoe_ctlr *ctlr;
+ struct fcoe_interface *fcoe;
+ int rc = 0;
+
+ mutex_lock(&fcoe_config_mutex);
+
+ rtnl_lock();
+ fcoe = fcoe_hostlist_lookup_port(netdev);
+ rtnl_unlock();
+
+ if (fcoe) {
+ ctlr = fcoe_to_ctlr(fcoe);
+ fcoe_ctlr_link_down(ctlr);
+ fcoe_clean_pending_queue(ctlr->lp);
+ } else
+ rc = -ENODEV;
+
+ mutex_unlock(&fcoe_config_mutex);
+ return rc;
+}
+
+/**
+ * fcoe_enable() - Enables a FCoE interface
+ * @netdev : The net_device object the Ethernet interface to create on
+ *
+ * Called from fcoe transport.
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_enable(struct net_device *netdev)
+{
+ struct fcoe_ctlr *ctlr;
+ struct fcoe_interface *fcoe;
+ int rc = 0;
+
+ mutex_lock(&fcoe_config_mutex);
+ rtnl_lock();
+ fcoe = fcoe_hostlist_lookup_port(netdev);
+ rtnl_unlock();
+
+ if (!fcoe) {
+ rc = -ENODEV;
+ goto out;
+ }
+
+ ctlr = fcoe_to_ctlr(fcoe);
+
+ if (!fcoe_link_ok(ctlr->lp))
+ fcoe_ctlr_link_up(ctlr);
+
+out:
+ mutex_unlock(&fcoe_config_mutex);
+ return rc;
+}
+
+/**
+ * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller
+ * @cdev: The FCoE Controller that is being enabled or disabled
+ *
+ * fcoe_sysfs will ensure that the state of 'enabled' has
+ * changed, so no checking is necessary here. This routine simply
+ * calls fcoe_enable or fcoe_disable, both of which are deprecated.
+ * When those routines are removed the functionality can be merged
+ * here.
+ */
+static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev)
+{
+ struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);
+ struct fc_lport *lport = ctlr->lp;
+ struct net_device *netdev = fcoe_netdev(lport);
+
+ switch (cdev->enabled) {
+ case FCOE_CTLR_ENABLED:
+ return fcoe_enable(netdev);
+ case FCOE_CTLR_DISABLED:
+ return fcoe_disable(netdev);
+ case FCOE_CTLR_UNUSED:
+ default:
+ return -ENOTSUPP;
+ };
+}
+
+/**
+ * fcoe_ctlr_mode() - Switch FIP mode
+ * @cdev: The FCoE Controller that is being modified
+ *
+ * When the FIP mode has been changed we need to update
+ * the multicast addresses to ensure we get the correct
+ * frames.
+ */
+static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev)
+{
+ struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
+ struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
+
+ if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN &&
+ ctlr->mode != FIP_MODE_VN2VN) {
+ dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS);
+ dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS);
+ dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS);
+ } else if (ctlr->mode != FIP_MODE_FABRIC) {
+ dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS);
+ dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS);
+ dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS);
+ }
+ fcoe_ctlr_set_fip_mode(ctlr_dev);
+}
+
+/**
+ * fcoe_destroy() - Destroy a FCoE interface
+ * @netdev : The net_device object the Ethernet interface to create on
+ *
+ * Called from fcoe transport
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_destroy(struct net_device *netdev)
+{
+ struct fcoe_ctlr *ctlr;
+ struct fcoe_interface *fcoe;
+ struct fc_lport *lport;
+ struct fcoe_port *port;
+ int rc = 0;
+
+ mutex_lock(&fcoe_config_mutex);
+ rtnl_lock();
+ fcoe = fcoe_hostlist_lookup_port(netdev);
+ if (!fcoe) {
+ rc = -ENODEV;
+ goto out_nodev;
+ }
+ ctlr = fcoe_to_ctlr(fcoe);
+ lport = ctlr->lp;
+ port = lport_priv(lport);
+ list_del(&fcoe->list);
+ queue_work(fcoe_wq, &port->destroy_work);
+out_nodev:
+ rtnl_unlock();
+ mutex_unlock(&fcoe_config_mutex);
+ return rc;
+}
+
+/**
+ * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
+ * @work: Handle to the FCoE port to be destroyed
+ */
+static void fcoe_destroy_work(struct work_struct *work)
+{
+ struct fcoe_ctlr_device *cdev;
+ struct fcoe_ctlr *ctlr;
+ struct fcoe_port *port;
+ struct fcoe_interface *fcoe;
+
+ port = container_of(work, struct fcoe_port, destroy_work);
+
+ fcoe_vport_remove(port->lport);
+
+ mutex_lock(&fcoe_config_mutex);
+
+ fcoe = port->priv;
+ ctlr = fcoe_to_ctlr(fcoe);
+ cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
+
+ rtnl_lock();
+ fcoe_if_destroy(port->lport);
+ if (!fcoe->removed)
+ fcoe_interface_remove(fcoe);
+ rtnl_unlock();
+ fcoe_interface_cleanup(fcoe);
+
+ mutex_unlock(&fcoe_config_mutex);
+
+ fcoe_ctlr_device_delete(cdev);
+}
+
+/**
+ * fcoe_match() - Check if the FCoE is supported on the given netdevice
+ * @netdev : The net_device object the Ethernet interface to create on
+ *
+ * Called from fcoe transport.
+ *
+ * Returns: always returns true as this is the default FCoE transport,
+ * i.e., support all netdevs.
+ */
+static bool fcoe_match(struct net_device *netdev)
+{
+ return true;
+}
+
+/**
+ * fcoe_dcb_create() - Initialize DCB attributes and hooks
+ * @netdev: The net_device object of the L2 link that should be queried
+ * @port: The fcoe_port to bind FCoE APP priority with
+ * @
+ */
+static void fcoe_dcb_create(struct fcoe_interface *fcoe)
+{
+ int ctlr_prio = TC_PRIO_BESTEFFORT;
+ int fcoe_prio = TC_PRIO_INTERACTIVE;
+ struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
+#ifdef CONFIG_DCB
+ int dcbx;
+ u8 fup, up;
+ struct net_device *netdev = fcoe->realdev;
+ struct dcb_app app = {
+ .priority = 0,
+ .protocol = ETH_P_FCOE
+ };
+
+ /* setup DCB priority attributes. */
+ if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {
+ dcbx = netdev->dcbnl_ops->getdcbx(netdev);
+
+ if (dcbx & DCB_CAP_DCBX_VER_IEEE) {
+ app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
+ up = dcb_ieee_getapp_mask(netdev, &app);
+ app.protocol = ETH_P_FIP;
+ fup = dcb_ieee_getapp_mask(netdev, &app);
+ } else {
+ app.selector = DCB_APP_IDTYPE_ETHTYPE;
+ up = dcb_getapp(netdev, &app);
+ app.protocol = ETH_P_FIP;
+ fup = dcb_getapp(netdev, &app);
+ }
+
+ fcoe_prio = ffs(up) ? ffs(up) - 1 : 0;
+ ctlr_prio = ffs(fup) ? ffs(fup) - 1 : fcoe_prio;
+ }
+#endif
+ fcoe->priority = fcoe_prio;
+ ctlr->priority = ctlr_prio;
+}
+
+enum fcoe_create_link_state {
+ FCOE_CREATE_LINK_DOWN,
+ FCOE_CREATE_LINK_UP,
+};
+
+/**
+ * _fcoe_create() - (internal) Create a fcoe interface
+ * @netdev : The net_device object the Ethernet interface to create on
+ * @fip_mode: The FIP mode for this creation
+ * @link_state: The ctlr link state on creation
+ *
+ * Called from either the libfcoe 'create' module parameter
+ * via fcoe_create or from fcoe_syfs's ctlr_create file.
+ *
+ * libfcoe's 'create' module parameter is deprecated so some
+ * consolidation of code can be done when that interface is
+ * removed.
+ */
+static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode,
+ enum fcoe_create_link_state link_state)
+{
+ int rc = 0;
+ struct fcoe_ctlr_device *ctlr_dev;
+ struct fcoe_ctlr *ctlr;
+ struct fcoe_interface *fcoe;
+ struct fc_lport *lport;
+
+ mutex_lock(&fcoe_config_mutex);
+ rtnl_lock();
+
+ /* look for existing lport */
+ if (fcoe_hostlist_lookup(netdev)) {
+ rc = -EEXIST;
+ goto out_nodev;
+ }
+
+ fcoe = fcoe_interface_create(netdev, fip_mode);
+ if (IS_ERR(fcoe)) {
+ rc = PTR_ERR(fcoe);
+ goto out_nodev;
+ }
+
+ ctlr = fcoe_to_ctlr(fcoe);
+ ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr);
+ lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0);
+ if (IS_ERR(lport)) {
+ printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
+ netdev->name);
+ rc = -EIO;
+ if (!fcoe->removed)
+ fcoe_interface_remove(fcoe);
+ rtnl_unlock();
+ fcoe_interface_cleanup(fcoe);
+ mutex_unlock(&fcoe_config_mutex);
+ fcoe_ctlr_device_delete(ctlr_dev);
+ return rc;
+ }
+
+ /* Make this the "master" N_Port */
+ ctlr->lp = lport;
+
+ /* setup DCB priority attributes. */
+ fcoe_dcb_create(fcoe);
+
+ /* start FIP Discovery and FLOGI */
+ lport->boot_time = jiffies;
+ fc_fabric_login(lport);
+
+ /*
+ * If the fcoe_ctlr_device is to be set to DISABLED
+ * it must be done after the lport is added to the
+ * hostlist, but before the rtnl_lock is released.
+ * This is because the rtnl_lock protects the
+ * hostlist that fcoe_device_notification uses. If
+ * the FCoE Controller is intended to be created
+ * DISABLED then 'enabled' needs to be considered
+ * handling link events. 'enabled' must be set
+ * before the lport can be found in the hostlist
+ * when a link up event is received.
+ */
+ if (link_state == FCOE_CREATE_LINK_UP)
+ ctlr_dev->enabled = FCOE_CTLR_ENABLED;
+ else
+ ctlr_dev->enabled = FCOE_CTLR_DISABLED;
+
+ if (link_state == FCOE_CREATE_LINK_UP &&
+ !fcoe_link_ok(lport)) {
+ rtnl_unlock();
+ fcoe_ctlr_link_up(ctlr);
+ mutex_unlock(&fcoe_config_mutex);
+ return rc;
+ }
+
+out_nodev:
+ rtnl_unlock();
+ mutex_unlock(&fcoe_config_mutex);
+
+ return rc;
+}
+
+/**
+ * fcoe_create() - Create a fcoe interface
+ * @netdev : The net_device object the Ethernet interface to create on
+ * @fip_mode: The FIP mode for this creation
+ *
+ * Called from fcoe transport
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode)
+{
+ return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP);
+}
+
+/**
+ * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs
+ * @netdev: The net_device to be used by the allocated FCoE Controller
+ *
+ * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr
+ * in a link_down state. The allows the user an opportunity to configure
+ * the FCoE Controller from sysfs before enabling the FCoE Controller.
+ *
+ * Creating in with this routine starts the FCoE Controller in Fabric
+ * mode. The user can change to VN2VN or another mode before enabling.
+ */
+static int fcoe_ctlr_alloc(struct net_device *netdev)
+{
+ return _fcoe_create(netdev, FIP_MODE_FABRIC,
+ FCOE_CREATE_LINK_DOWN);
+}
+
+/**
+ * fcoe_link_ok() - Check if the link is OK for a local port
+ * @lport: The local port to check link on
+ *
+ * Returns: 0 if link is UP and OK, -1 if not
+ *
+ */
+static int fcoe_link_ok(struct fc_lport *lport)
+{
+ struct net_device *netdev = fcoe_netdev(lport);
+
+ if (netif_oper_up(netdev))
+ return 0;
+ return -1;
+}
+
+/**
+ * fcoe_percpu_clean() - Clear all pending skbs for an local port
+ * @lport: The local port whose skbs are to be cleared
+ *
+ * Must be called with fcoe_create_mutex held to single-thread completion.
+ *
+ * This flushes the pending skbs by flush the work item for each CPU. The work
+ * item on each possible CPU is flushed because we may have used the per-CPU
+ * struct of an offline CPU.
+ */
+static void fcoe_percpu_clean(struct fc_lport *lport)
+{
+ struct fcoe_percpu_s *pp;
+ unsigned int cpu;
+
+ for_each_possible_cpu(cpu) {
+ pp = &per_cpu(fcoe_percpu, cpu);
+
+ flush_work(&pp->work);
+ }
+}
+
+/**
+ * fcoe_reset() - Reset a local port
+ * @shost: The SCSI host associated with the local port to be reset
+ *
+ * Returns: Always 0 (return value required by FC transport template)
+ */
+static int fcoe_reset(struct Scsi_Host *shost)
+{
+ struct fc_lport *lport = shost_priv(shost);
+ struct fcoe_port *port = lport_priv(lport);
+ struct fcoe_interface *fcoe = port->priv;
+ struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
+ struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
+
+ fcoe_ctlr_link_down(ctlr);
+ fcoe_clean_pending_queue(ctlr->lp);
+
+ if (cdev->enabled != FCOE_CTLR_DISABLED &&
+ !fcoe_link_ok(ctlr->lp))
+ fcoe_ctlr_link_up(ctlr);
+ return 0;
+}
+
+/**
+ * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
+ * @netdev: The net device used as a key
+ *
+ * Locking: Must be called with the RNL mutex held.
+ *
+ * Returns: NULL or the FCoE interface
+ */
+static struct fcoe_interface *
+fcoe_hostlist_lookup_port(const struct net_device *netdev)
+{
+ struct fcoe_interface *fcoe;
+
+ list_for_each_entry(fcoe, &fcoe_hostlist, list) {
+ if (fcoe->netdev == netdev)
+ return fcoe;
+ }
+ return NULL;
+}
+
+/**
+ * fcoe_hostlist_lookup() - Find the local port associated with a
+ * given net device
+ * @netdev: The netdevice used as a key
+ *
+ * Locking: Must be called with the RTNL mutex held
+ *
+ * Returns: NULL or the local port
+ */
+static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
+{
+ struct fcoe_ctlr *ctlr;
+ struct fcoe_interface *fcoe;
+
+ fcoe = fcoe_hostlist_lookup_port(netdev);
+ ctlr = fcoe_to_ctlr(fcoe);
+ return (fcoe) ? ctlr->lp : NULL;
+}
+
+/**
+ * fcoe_hostlist_add() - Add the FCoE interface identified by a local
+ * port to the hostlist
+ * @lport: The local port that identifies the FCoE interface to be added
+ *
+ * Locking: must be called with the RTNL mutex held
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_hostlist_add(const struct fc_lport *lport)
+{
+ struct fcoe_interface *fcoe;
+ struct fcoe_port *port;
+
+ fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
+ if (!fcoe) {
+ port = lport_priv(lport);
+ fcoe = port->priv;
+ list_add_tail(&fcoe->list, &fcoe_hostlist);
+ }
+ return 0;
+}
+
+/**
+ * fcoe_hostlist_del() - Remove the FCoE interface identified by a local
+ * port to the hostlist
+ * @lport: The local port that identifies the FCoE interface to be added
+ *
+ * Locking: must be called with the RTNL mutex held
+ *
+ */
+static void fcoe_hostlist_del(const struct fc_lport *lport)
+{
+ struct fcoe_interface *fcoe;
+ struct fcoe_port *port;
+
+ port = lport_priv(lport);
+ fcoe = port->priv;
+ list_del(&fcoe->list);
+ return;
+}
+
+static struct fcoe_transport fcoe_sw_transport = {
+ .name = {FCOE_TRANSPORT_DEFAULT},
+ .attached = false,
+ .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
+ .match = fcoe_match,
+ .alloc = fcoe_ctlr_alloc,
+ .create = fcoe_create,
+ .destroy = fcoe_destroy,
+ .enable = fcoe_enable,
+ .disable = fcoe_disable,
+};
+
+/**
+ * fcoe_init() - Initialize fcoe.ko
+ *
+ * Returns: 0 on success, or a negative value on failure
+ */
+static int __init fcoe_init(void)
+{
+ struct fcoe_percpu_s *p;
+ unsigned int cpu;
+ int rc = 0;
+
+ fcoe_wq = alloc_workqueue("fcoe", 0, 0);
+ if (!fcoe_wq)
+ return -ENOMEM;
+
+ /* register as a fcoe transport */
+ rc = fcoe_transport_attach(&fcoe_sw_transport);
+ if (rc) {
+ printk(KERN_ERR "failed to register an fcoe transport, check "
+ "if libfcoe is loaded\n");
+ goto out_destroy;
+ }
+
+ mutex_lock(&fcoe_config_mutex);
+
+ for_each_possible_cpu(cpu) {
+ p = per_cpu_ptr(&fcoe_percpu, cpu);
+ INIT_WORK(&p->work, fcoe_receive_work);
+ skb_queue_head_init(&p->fcoe_rx_list);
+ }
+
+ /* Setup link change notification */
+ fcoe_dev_setup();
+
+ rc = fcoe_if_init();
+ if (rc)
+ goto out_free;
+
+ mutex_unlock(&fcoe_config_mutex);
+ return 0;
+
+out_free:
+ mutex_unlock(&fcoe_config_mutex);
+out_destroy:
+ destroy_workqueue(fcoe_wq);
+ return rc;
+}
+module_init(fcoe_init);
+
+/**
+ * fcoe_exit() - Clean up fcoe.ko
+ *
+ * Returns: 0 on success or a negative value on failure
+ */
+static void __exit fcoe_exit(void)
+{
+ struct fcoe_interface *fcoe, *tmp;
+ struct fcoe_ctlr *ctlr;
+ struct fcoe_port *port;
+ unsigned int cpu;
+
+ mutex_lock(&fcoe_config_mutex);
+
+ fcoe_dev_cleanup();
+
+ /* releases the associated fcoe hosts */
+ rtnl_lock();
+ list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
+ ctlr = fcoe_to_ctlr(fcoe);
+ port = lport_priv(ctlr->lp);
+ fcoe_hostlist_del(port->lport);
+ queue_work(fcoe_wq, &port->destroy_work);
+ }
+ rtnl_unlock();
+
+ for_each_possible_cpu(cpu)
+ fcoe_thread_cleanup_local(cpu);
+
+ mutex_unlock(&fcoe_config_mutex);
+
+ /*
+ * destroy_work's may be chained but destroy_workqueue()
+ * can take care of them. Just kill the fcoe_wq.
+ */
+ destroy_workqueue(fcoe_wq);
+
+ /*
+ * Detaching from the scsi transport must happen after all
+ * destroys are done on the fcoe_wq. destroy_workqueue will
+ * enusre the fcoe_wq is flushed.
+ */
+ fcoe_if_exit();
+
+ /* detach from fcoe transport */
+ fcoe_transport_detach(&fcoe_sw_transport);
+}
+module_exit(fcoe_exit);
+
+/**
+ * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
+ * @seq: active sequence in the FLOGI or FDISC exchange
+ * @fp: response frame, or error encoded in a pointer (timeout)
+ * @arg: pointer to the fcoe_ctlr structure
+ *
+ * This handles MAC address management for FCoE, then passes control on to
+ * the libfc FLOGI response handler.
+ */
+static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
+{
+ struct fcoe_ctlr *fip = arg;
+ struct fc_exch *exch = fc_seq_exch(seq);
+ struct fc_lport *lport = exch->lp;
+ u8 *mac;
+
+ if (IS_ERR(fp))
+ goto done;
+
+ mac = fr_cb(fp)->granted_mac;
+ /* pre-FIP */
+ if (is_zero_ether_addr(mac))
+ fcoe_ctlr_recv_flogi(fip, lport, fp);
+ if (!is_zero_ether_addr(mac))
+ fcoe_update_src_mac(lport, mac);
+done:
+ fc_lport_flogi_resp(seq, fp, lport);
+}
+
+/**
+ * fcoe_logo_resp() - FCoE specific LOGO response handler
+ * @seq: active sequence in the LOGO exchange
+ * @fp: response frame, or error encoded in a pointer (timeout)
+ * @arg: pointer to the fcoe_ctlr structure
+ *
+ * This handles MAC address management for FCoE, then passes control on to
+ * the libfc LOGO response handler.
+ */
+static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
+{
+ struct fc_lport *lport = arg;
+ static u8 zero_mac[ETH_ALEN] = { 0 };
+
+ if (!IS_ERR(fp))
+ fcoe_update_src_mac(lport, zero_mac);
+ fc_lport_logo_resp(seq, fp, lport);
+}
+
+/**
+ * fcoe_elsct_send - FCoE specific ELS handler
+ *
+ * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
+ * using FCoE specific response handlers and passing the FIP controller as
+ * the argument (the lport is still available from the exchange).
+ *
+ * Most of the work here is just handed off to the libfc routine.
+ */
+static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
+ struct fc_frame *fp, unsigned int op,
+ void (*resp)(struct fc_seq *,
+ struct fc_frame *,
+ void *),
+ void *arg, u32 timeout)
+{
+ struct fcoe_port *port = lport_priv(lport);
+ struct fcoe_interface *fcoe = port->priv;
+ struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
+ struct fc_frame_header *fh = fc_frame_header_get(fp);
+
+ switch (op) {
+ case ELS_FLOGI:
+ case ELS_FDISC:
+ if (lport->point_to_multipoint)
+ break;
+ return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
+ fip, timeout);
+ case ELS_LOGO:
+ /* only hook onto fabric logouts, not port logouts */
+ if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
+ break;
+ return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
+ lport, timeout);
+ }
+ return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
+}
+
+/**
+ * fcoe_vport_create() - create an fc_host/scsi_host for a vport
+ * @vport: fc_vport object to create a new fc_host for
+ * @disabled: start the new fc_host in a disabled state by default?
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
+{
+ struct Scsi_Host *shost = vport_to_shost(vport);
+ struct fc_lport *n_port = shost_priv(shost);
+ struct fcoe_port *port = lport_priv(n_port);
+ struct fcoe_interface *fcoe = port->priv;
+ struct net_device *netdev = fcoe->netdev;
+ struct fc_lport *vn_port;
+ int rc;
+ char buf[32];
+
+ rc = fcoe_validate_vport_create(vport);
+ if (rc) {
+ fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
+ printk(KERN_ERR "fcoe: Failed to create vport, "
+ "WWPN (0x%s) already exists\n",
+ buf);
+ return rc;
+ }
+
+ mutex_lock(&fcoe_config_mutex);
+ rtnl_lock();
+ vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
+ rtnl_unlock();
+ mutex_unlock(&fcoe_config_mutex);
+
+ if (IS_ERR(vn_port)) {
+ printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
+ netdev->name);
+ return -EIO;
+ }
+
+ if (disabled) {
+ fc_vport_set_state(vport, FC_VPORT_DISABLED);
+ } else {
+ vn_port->boot_time = jiffies;
+ fc_fabric_login(vn_port);
+ fc_vport_setlink(vn_port);
+ }
+ return 0;
+}
+
+/**
+ * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
+ * @vport: fc_vport object that is being destroyed
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_vport_destroy(struct fc_vport *vport)
+{
+ struct Scsi_Host *shost = vport_to_shost(vport);
+ struct fc_lport *n_port = shost_priv(shost);
+ struct fc_lport *vn_port = vport->dd_data;
+
+ mutex_lock(&n_port->lp_mutex);
+ list_del(&vn_port->list);
+ mutex_unlock(&n_port->lp_mutex);
+
+ mutex_lock(&fcoe_config_mutex);
+ rtnl_lock();
+ fcoe_if_destroy(vn_port);
+ rtnl_unlock();
+ mutex_unlock(&fcoe_config_mutex);
+
+ return 0;
+}
+
+/**
+ * fcoe_vport_remove() - remove attached vports
+ * @lport: lport for which the vports should be removed
+ */
+static void fcoe_vport_remove(struct fc_lport *lport)
+{
+ struct Scsi_Host *shost;
+ struct fc_host_attrs *fc_host;
+ unsigned long flags;
+ struct fc_vport *vport;
+ struct fc_vport *next_vport;
+
+ shost = lport->host;
+ fc_host = shost_to_fc_host(shost);
+
+ /* Loop through all the vports and mark them for deletion */
+ spin_lock_irqsave(shost->host_lock, flags);
+ list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
+ if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
+ continue;
+ } else {
+ vport->flags |= FC_VPORT_DELETING;
+ queue_work(fc_host_work_q(shost),
+ &vport->vport_delete_work);
+ }
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ flush_workqueue(fc_host_work_q(shost));
+}
+
+/**
+ * fcoe_vport_disable() - change vport state
+ * @vport: vport to bring online/offline
+ * @disable: should the vport be disabled?
+ */
+static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
+{
+ struct fc_lport *lport = vport->dd_data;
+
+ if (disable) {
+ fc_vport_set_state(vport, FC_VPORT_DISABLED);
+ fc_fabric_logoff(lport);
+ } else {
+ lport->boot_time = jiffies;
+ fc_fabric_login(lport);
+ fc_vport_setlink(lport);
+ }
+
+ return 0;
+}
+
+/**
+ * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
+ * @vport: fc_vport with a new symbolic name string
+ *
+ * After generating a new symbolic name string, a new RSPN_ID request is
+ * sent to the name server. There is no response handler, so if it fails
+ * for some reason it will not be retried.
+ */
+static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
+{
+ struct fc_lport *lport = vport->dd_data;
+ struct fc_frame *fp;
+ size_t len;
+
+ snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
+ "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
+ fcoe_netdev(lport)->name, vport->symbolic_name);
+
+ if (lport->state != LPORT_ST_READY)
+ return;
+
+ len = strnlen(fc_host_symbolic_name(lport->host), 255);
+ fp = fc_frame_alloc(lport,
+ sizeof(struct fc_ct_hdr) +
+ sizeof(struct fc_ns_rspn) + len);
+ if (!fp)
+ return;
+ lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
+ NULL, NULL, 3 * lport->r_a_tov);
+}
+
+static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev)
+{
+ struct fcoe_ctlr_device *ctlr_dev =
+ fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
+ struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
+ struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
+
+ fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev);
+}
+
+/**
+ * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
+ * @lport: the local port
+ * @port_id: the port ID
+ * @fp: the received frame, if any, that caused the port_id to be set.
+ *
+ * This routine handles the case where we received a FLOGI and are
+ * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
+ * so it can set the non-mapped mode and gateway address.
+ *
+ * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
+ */
+static void fcoe_set_port_id(struct fc_lport *lport,
+ u32 port_id, struct fc_frame *fp)
+{
+ struct fcoe_port *port = lport_priv(lport);
+ struct fcoe_interface *fcoe = port->priv;
+ struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
+
+ if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
+ fcoe_ctlr_recv_flogi(ctlr, lport, fp);
+}
diff --git a/drivers/scsi/fcoe/fcoe.h b/drivers/scsi/fcoe/fcoe.h
new file mode 100644
index 0000000..6aa4820
--- /dev/null
+++ b/drivers/scsi/fcoe/fcoe.h
@@ -0,0 +1,105 @@
+/*
+ * Copyright(c) 2009 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+#ifndef _FCOE_H_
+#define _FCOE_H_
+
+#include <linux/skbuff.h>
+#include <linux/kthread.h>
+
+#define FCOE_MAX_QUEUE_DEPTH 256
+#define FCOE_MIN_QUEUE_DEPTH 32
+
+#define FCOE_WORD_TO_BYTE 4
+
+#define FCOE_VERSION "0.1"
+#define FCOE_NAME "fcoe"
+#define FCOE_VENDOR "Open-FCoE.org"
+
+#define FCOE_MAX_LUN 0xFFFF
+#define FCOE_MAX_FCP_TARGET 256
+
+#define FCOE_MAX_OUTSTANDING_COMMANDS 1024
+
+#define FCOE_MIN_XID 0x0000 /* the min xid supported by fcoe_sw */
+#define FCOE_MAX_XID 0x0FFF /* the max xid supported by fcoe_sw */
+
+extern unsigned int fcoe_debug_logging;
+
+#define FCOE_LOGGING 0x01 /* General logging, not categorized */
+#define FCOE_NETDEV_LOGGING 0x02 /* Netdevice logging */
+
+#define FCOE_CHECK_LOGGING(LEVEL, CMD) \
+do { \
+ if (unlikely(fcoe_debug_logging & LEVEL)) \
+ do { \
+ CMD; \
+ } while (0); \
+} while (0)
+
+#define FCOE_DBG(fmt, args...) \
+ FCOE_CHECK_LOGGING(FCOE_LOGGING, \
+ pr_info("fcoe: " fmt, ##args);)
+
+#define FCOE_NETDEV_DBG(netdev, fmt, args...) \
+ FCOE_CHECK_LOGGING(FCOE_NETDEV_LOGGING, \
+ pr_info("fcoe: %s: " fmt, \
+ netdev->name, ##args);)
+
+/**
+ * struct fcoe_interface - A FCoE interface
+ * @list: Handle for a list of FCoE interfaces
+ * @netdev: The associated net device
+ * @fcoe_packet_type: FCoE packet type
+ * @fip_packet_type: FIP packet type
+ * @oem: The offload exchange manager for all local port
+ * instances associated with this port
+ * @removed: Indicates fcoe interface removed from net device
+ * @priority: Priority for the FCoE packet (DCB)
+ * This structure is 1:1 with a net device.
+ */
+struct fcoe_interface {
+ struct list_head list;
+ struct net_device *netdev;
+ struct net_device *realdev;
+ struct packet_type fcoe_packet_type;
+ struct packet_type fip_packet_type;
+ struct packet_type fip_vlan_packet_type;
+ struct fc_exch_mgr *oem;
+ u8 removed;
+ u8 priority;
+};
+
+#define fcoe_to_ctlr(x) \
+ (struct fcoe_ctlr *)(((struct fcoe_ctlr *)(x)) - 1)
+
+#define fcoe_from_ctlr(x) \
+ ((struct fcoe_interface *)((x) + 1))
+
+/**
+ * fcoe_netdev() - Return the net device associated with a local port
+ * @lport: The local port to get the net device from
+ */
+static inline struct net_device *fcoe_netdev(const struct fc_lport *lport)
+{
+ return ((struct fcoe_interface *)
+ ((struct fcoe_port *)lport_priv(lport))->priv)->netdev;
+}
+
+#endif /* _FCOE_H_ */
diff --git a/drivers/scsi/fcoe/fcoe_ctlr.c b/drivers/scsi/fcoe/fcoe_ctlr.c
new file mode 100644
index 0000000..54da316
--- /dev/null
+++ b/drivers/scsi/fcoe/fcoe_ctlr.c
@@ -0,0 +1,3279 @@
+/*
+ * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved.
+ * Copyright (c) 2009 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/timer.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/errno.h>
+#include <linux/bitops.h>
+#include <linux/slab.h>
+#include <net/rtnetlink.h>
+
+#include <scsi/fc/fc_els.h>
+#include <scsi/fc/fc_fs.h>
+#include <scsi/fc/fc_fip.h>
+#include <scsi/fc/fc_encaps.h>
+#include <scsi/fc/fc_fcoe.h>
+#include <scsi/fc/fc_fcp.h>
+
+#include <scsi/libfc.h>
+#include <scsi/libfcoe.h>
+
+#include "libfcoe.h"
+
+#define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */
+#define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */
+
+static void fcoe_ctlr_timeout(struct timer_list *);
+static void fcoe_ctlr_timer_work(struct work_struct *);
+static void fcoe_ctlr_recv_work(struct work_struct *);
+static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *);
+
+static void fcoe_ctlr_vn_start(struct fcoe_ctlr *);
+static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *, struct sk_buff *);
+static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *);
+static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *, u32, u8 *);
+
+static int fcoe_ctlr_vlan_recv(struct fcoe_ctlr *, struct sk_buff *);
+
+static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS;
+static u8 fcoe_all_enode[ETH_ALEN] = FIP_ALL_ENODE_MACS;
+static u8 fcoe_all_vn2vn[ETH_ALEN] = FIP_ALL_VN2VN_MACS;
+static u8 fcoe_all_p2p[ETH_ALEN] = FIP_ALL_P2P_MACS;
+
+static const char * const fcoe_ctlr_states[] = {
+ [FIP_ST_DISABLED] = "DISABLED",
+ [FIP_ST_LINK_WAIT] = "LINK_WAIT",
+ [FIP_ST_AUTO] = "AUTO",
+ [FIP_ST_NON_FIP] = "NON_FIP",
+ [FIP_ST_ENABLED] = "ENABLED",
+ [FIP_ST_VNMP_START] = "VNMP_START",
+ [FIP_ST_VNMP_PROBE1] = "VNMP_PROBE1",
+ [FIP_ST_VNMP_PROBE2] = "VNMP_PROBE2",
+ [FIP_ST_VNMP_CLAIM] = "VNMP_CLAIM",
+ [FIP_ST_VNMP_UP] = "VNMP_UP",
+};
+
+static const char *fcoe_ctlr_state(enum fip_state state)
+{
+ const char *cp = "unknown";
+
+ if (state < ARRAY_SIZE(fcoe_ctlr_states))
+ cp = fcoe_ctlr_states[state];
+ if (!cp)
+ cp = "unknown";
+ return cp;
+}
+
+/**
+ * fcoe_ctlr_set_state() - Set and do debug printing for the new FIP state.
+ * @fip: The FCoE controller
+ * @state: The new state
+ */
+static void fcoe_ctlr_set_state(struct fcoe_ctlr *fip, enum fip_state state)
+{
+ if (state == fip->state)
+ return;
+ if (fip->lp)
+ LIBFCOE_FIP_DBG(fip, "state %s -> %s\n",
+ fcoe_ctlr_state(fip->state), fcoe_ctlr_state(state));
+ fip->state = state;
+}
+
+/**
+ * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid
+ * @fcf: The FCF to check
+ *
+ * Return non-zero if FCF fcoe_size has been validated.
+ */
+static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf)
+{
+ return (fcf->flags & FIP_FL_SOL) != 0;
+}
+
+/**
+ * fcoe_ctlr_fcf_usable() - Check if a FCF is usable
+ * @fcf: The FCF to check
+ *
+ * Return non-zero if the FCF is usable.
+ */
+static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf)
+{
+ u16 flags = FIP_FL_SOL | FIP_FL_AVAIL;
+
+ return (fcf->flags & flags) == flags;
+}
+
+/**
+ * fcoe_ctlr_map_dest() - Set flag and OUI for mapping destination addresses
+ * @fip: The FCoE controller
+ */
+static void fcoe_ctlr_map_dest(struct fcoe_ctlr *fip)
+{
+ if (fip->mode == FIP_MODE_VN2VN)
+ hton24(fip->dest_addr, FIP_VN_FC_MAP);
+ else
+ hton24(fip->dest_addr, FIP_DEF_FC_MAP);
+ hton24(fip->dest_addr + 3, 0);
+ fip->map_dest = 1;
+}
+
+/**
+ * fcoe_ctlr_init() - Initialize the FCoE Controller instance
+ * @fip: The FCoE controller to initialize
+ */
+void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_state mode)
+{
+ fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT);
+ fip->mode = mode;
+ fip->fip_resp = false;
+ INIT_LIST_HEAD(&fip->fcfs);
+ mutex_init(&fip->ctlr_mutex);
+ spin_lock_init(&fip->ctlr_lock);
+ fip->flogi_oxid = FC_XID_UNKNOWN;
+ timer_setup(&fip->timer, fcoe_ctlr_timeout, 0);
+ INIT_WORK(&fip->timer_work, fcoe_ctlr_timer_work);
+ INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work);
+ skb_queue_head_init(&fip->fip_recv_list);
+}
+EXPORT_SYMBOL(fcoe_ctlr_init);
+
+/**
+ * fcoe_sysfs_fcf_add() - Add a fcoe_fcf{,_device} to a fcoe_ctlr{,_device}
+ * @new: The newly discovered FCF
+ *
+ * Called with fip->ctlr_mutex held
+ */
+static int fcoe_sysfs_fcf_add(struct fcoe_fcf *new)
+{
+ struct fcoe_ctlr *fip = new->fip;
+ struct fcoe_ctlr_device *ctlr_dev;
+ struct fcoe_fcf_device *temp, *fcf_dev;
+ int rc = -ENOMEM;
+
+ LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n",
+ new->fabric_name, new->fcf_mac);
+
+ temp = kzalloc(sizeof(*temp), GFP_KERNEL);
+ if (!temp)
+ goto out;
+
+ temp->fabric_name = new->fabric_name;
+ temp->switch_name = new->switch_name;
+ temp->fc_map = new->fc_map;
+ temp->vfid = new->vfid;
+ memcpy(temp->mac, new->fcf_mac, ETH_ALEN);
+ temp->priority = new->pri;
+ temp->fka_period = new->fka_period;
+ temp->selected = 0; /* default to unselected */
+
+ /*
+ * If ctlr_dev doesn't exist then it means we're a libfcoe user
+ * who doesn't use fcoe_syfs and didn't allocate a fcoe_ctlr_device.
+ * fnic would be an example of a driver with this behavior. In this
+ * case we want to add the fcoe_fcf to the fcoe_ctlr list, but we
+ * don't want to make sysfs changes.
+ */
+
+ ctlr_dev = fcoe_ctlr_to_ctlr_dev(fip);
+ if (ctlr_dev) {
+ mutex_lock(&ctlr_dev->lock);
+ fcf_dev = fcoe_fcf_device_add(ctlr_dev, temp);
+ if (unlikely(!fcf_dev)) {
+ rc = -ENOMEM;
+ mutex_unlock(&ctlr_dev->lock);
+ goto out;
+ }
+
+ /*
+ * The fcoe_sysfs layer can return a CONNECTED fcf that
+ * has a priv (fcf was never deleted) or a CONNECTED fcf
+ * that doesn't have a priv (fcf was deleted). However,
+ * libfcoe will always delete FCFs before trying to add
+ * them. This is ensured because both recv_adv and
+ * age_fcfs are protected by the the fcoe_ctlr's mutex.
+ * This means that we should never get a FCF with a
+ * non-NULL priv pointer.
+ */
+ BUG_ON(fcf_dev->priv);
+
+ fcf_dev->priv = new;
+ new->fcf_dev = fcf_dev;
+ mutex_unlock(&ctlr_dev->lock);
+ }
+
+ list_add(&new->list, &fip->fcfs);
+ fip->fcf_count++;
+ rc = 0;
+
+out:
+ kfree(temp);
+ return rc;
+}
+
+/**
+ * fcoe_sysfs_fcf_del() - Remove a fcoe_fcf{,_device} to a fcoe_ctlr{,_device}
+ * @new: The FCF to be removed
+ *
+ * Called with fip->ctlr_mutex held
+ */
+static void fcoe_sysfs_fcf_del(struct fcoe_fcf *new)
+{
+ struct fcoe_ctlr *fip = new->fip;
+ struct fcoe_ctlr_device *cdev;
+ struct fcoe_fcf_device *fcf_dev;
+
+ list_del(&new->list);
+ fip->fcf_count--;
+
+ /*
+ * If ctlr_dev doesn't exist then it means we're a libfcoe user
+ * who doesn't use fcoe_syfs and didn't allocate a fcoe_ctlr_device
+ * or a fcoe_fcf_device.
+ *
+ * fnic would be an example of a driver with this behavior. In this
+ * case we want to remove the fcoe_fcf from the fcoe_ctlr list (above),
+ * but we don't want to make sysfs changes.
+ */
+ cdev = fcoe_ctlr_to_ctlr_dev(fip);
+ if (cdev) {
+ mutex_lock(&cdev->lock);
+ fcf_dev = fcoe_fcf_to_fcf_dev(new);
+ WARN_ON(!fcf_dev);
+ new->fcf_dev = NULL;
+ fcoe_fcf_device_delete(fcf_dev);
+ kfree(new);
+ mutex_unlock(&cdev->lock);
+ }
+}
+
+/**
+ * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller
+ * @fip: The FCoE controller whose FCFs are to be reset
+ *
+ * Called with &fcoe_ctlr lock held.
+ */
+static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip)
+{
+ struct fcoe_fcf *fcf;
+ struct fcoe_fcf *next;
+
+ fip->sel_fcf = NULL;
+ list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
+ fcoe_sysfs_fcf_del(fcf);
+ }
+ WARN_ON(fip->fcf_count);
+
+ fip->sel_time = 0;
+}
+
+/**
+ * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller
+ * @fip: The FCoE controller to tear down
+ *
+ * This is called by FCoE drivers before freeing the &fcoe_ctlr.
+ *
+ * The receive handler will have been deleted before this to guarantee
+ * that no more recv_work will be scheduled.
+ *
+ * The timer routine will simply return once we set FIP_ST_DISABLED.
+ * This guarantees that no further timeouts or work will be scheduled.
+ */
+void fcoe_ctlr_destroy(struct fcoe_ctlr *fip)
+{
+ cancel_work_sync(&fip->recv_work);
+ skb_queue_purge(&fip->fip_recv_list);
+
+ mutex_lock(&fip->ctlr_mutex);
+ fcoe_ctlr_set_state(fip, FIP_ST_DISABLED);
+ fcoe_ctlr_reset_fcfs(fip);
+ mutex_unlock(&fip->ctlr_mutex);
+ del_timer_sync(&fip->timer);
+ cancel_work_sync(&fip->timer_work);
+}
+EXPORT_SYMBOL(fcoe_ctlr_destroy);
+
+/**
+ * fcoe_ctlr_announce() - announce new FCF selection
+ * @fip: The FCoE controller
+ *
+ * Also sets the destination MAC for FCoE and control packets
+ *
+ * Called with neither ctlr_mutex nor ctlr_lock held.
+ */
+static void fcoe_ctlr_announce(struct fcoe_ctlr *fip)
+{
+ struct fcoe_fcf *sel;
+ struct fcoe_fcf *fcf;
+
+ mutex_lock(&fip->ctlr_mutex);
+ spin_lock_bh(&fip->ctlr_lock);
+
+ kfree_skb(fip->flogi_req);
+ fip->flogi_req = NULL;
+ list_for_each_entry(fcf, &fip->fcfs, list)
+ fcf->flogi_sent = 0;
+
+ spin_unlock_bh(&fip->ctlr_lock);
+ sel = fip->sel_fcf;
+
+ if (sel && ether_addr_equal(sel->fcf_mac, fip->dest_addr))
+ goto unlock;
+ if (!is_zero_ether_addr(fip->dest_addr)) {
+ printk(KERN_NOTICE "libfcoe: host%d: "
+ "FIP Fibre-Channel Forwarder MAC %pM deselected\n",
+ fip->lp->host->host_no, fip->dest_addr);
+ memset(fip->dest_addr, 0, ETH_ALEN);
+ }
+ if (sel) {
+ printk(KERN_INFO "libfcoe: host%d: FIP selected "
+ "Fibre-Channel Forwarder MAC %pM\n",
+ fip->lp->host->host_no, sel->fcf_mac);
+ memcpy(fip->dest_addr, sel->fcoe_mac, ETH_ALEN);
+ fip->map_dest = 0;
+ }
+unlock:
+ mutex_unlock(&fip->ctlr_mutex);
+}
+
+/**
+ * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port
+ * @fip: The FCoE controller to get the maximum FCoE size from
+ *
+ * Returns the maximum packet size including the FCoE header and trailer,
+ * but not including any Ethernet or VLAN headers.
+ */
+static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip)
+{
+ /*
+ * Determine the max FCoE frame size allowed, including
+ * FCoE header and trailer.
+ * Note: lp->mfs is currently the payload size, not the frame size.
+ */
+ return fip->lp->mfs + sizeof(struct fc_frame_header) +
+ sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof);
+}
+
+/**
+ * fcoe_ctlr_solicit() - Send a FIP solicitation
+ * @fip: The FCoE controller to send the solicitation on
+ * @fcf: The destination FCF (if NULL, a multicast solicitation is sent)
+ */
+static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf)
+{
+ struct sk_buff *skb;
+ struct fip_sol {
+ struct ethhdr eth;
+ struct fip_header fip;
+ struct {
+ struct fip_mac_desc mac;
+ struct fip_wwn_desc wwnn;
+ struct fip_size_desc size;
+ } __packed desc;
+ } __packed * sol;
+ u32 fcoe_size;
+
+ skb = dev_alloc_skb(sizeof(*sol));
+ if (!skb)
+ return;
+
+ sol = (struct fip_sol *)skb->data;
+
+ memset(sol, 0, sizeof(*sol));
+ memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN);
+ memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
+ sol->eth.h_proto = htons(ETH_P_FIP);
+
+ sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
+ sol->fip.fip_op = htons(FIP_OP_DISC);
+ sol->fip.fip_subcode = FIP_SC_SOL;
+ sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW);
+ sol->fip.fip_flags = htons(FIP_FL_FPMA);
+ if (fip->spma)
+ sol->fip.fip_flags |= htons(FIP_FL_SPMA);
+
+ sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
+ sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW;
+ memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
+
+ sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
+ sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW;
+ put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn);
+
+ fcoe_size = fcoe_ctlr_fcoe_size(fip);
+ sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE;
+ sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW;
+ sol->desc.size.fd_size = htons(fcoe_size);
+
+ skb_put(skb, sizeof(*sol));
+ skb->protocol = htons(ETH_P_FIP);
+ skb->priority = fip->priority;
+ skb_reset_mac_header(skb);
+ skb_reset_network_header(skb);
+ fip->send(fip, skb);
+
+ if (!fcf)
+ fip->sol_time = jiffies;
+}
+
+/**
+ * fcoe_ctlr_link_up() - Start FCoE controller
+ * @fip: The FCoE controller to start
+ *
+ * Called from the LLD when the network link is ready.
+ */
+void fcoe_ctlr_link_up(struct fcoe_ctlr *fip)
+{
+ mutex_lock(&fip->ctlr_mutex);
+ if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) {
+ mutex_unlock(&fip->ctlr_mutex);
+ fc_linkup(fip->lp);
+ } else if (fip->state == FIP_ST_LINK_WAIT) {
+ fcoe_ctlr_set_state(fip, fip->mode);
+ switch (fip->mode) {
+ default:
+ LIBFCOE_FIP_DBG(fip, "invalid mode %d\n", fip->mode);
+ /* fall-through */
+ case FIP_MODE_AUTO:
+ LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n");
+ /* fall-through */
+ case FIP_MODE_FABRIC:
+ case FIP_MODE_NON_FIP:
+ mutex_unlock(&fip->ctlr_mutex);
+ fc_linkup(fip->lp);
+ fcoe_ctlr_solicit(fip, NULL);
+ break;
+ case FIP_MODE_VN2VN:
+ fcoe_ctlr_vn_start(fip);
+ mutex_unlock(&fip->ctlr_mutex);
+ fc_linkup(fip->lp);
+ break;
+ }
+ } else
+ mutex_unlock(&fip->ctlr_mutex);
+}
+EXPORT_SYMBOL(fcoe_ctlr_link_up);
+
+/**
+ * fcoe_ctlr_reset() - Reset a FCoE controller
+ * @fip: The FCoE controller to reset
+ */
+static void fcoe_ctlr_reset(struct fcoe_ctlr *fip)
+{
+ fcoe_ctlr_reset_fcfs(fip);
+ del_timer(&fip->timer);
+ fip->ctlr_ka_time = 0;
+ fip->port_ka_time = 0;
+ fip->sol_time = 0;
+ fip->flogi_oxid = FC_XID_UNKNOWN;
+ fcoe_ctlr_map_dest(fip);
+}
+
+/**
+ * fcoe_ctlr_link_down() - Stop a FCoE controller
+ * @fip: The FCoE controller to be stopped
+ *
+ * Returns non-zero if the link was up and now isn't.
+ *
+ * Called from the LLD when the network link is not ready.
+ * There may be multiple calls while the link is down.
+ */
+int fcoe_ctlr_link_down(struct fcoe_ctlr *fip)
+{
+ int link_dropped;
+
+ LIBFCOE_FIP_DBG(fip, "link down.\n");
+ mutex_lock(&fip->ctlr_mutex);
+ fcoe_ctlr_reset(fip);
+ link_dropped = fip->state != FIP_ST_LINK_WAIT;
+ fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT);
+ mutex_unlock(&fip->ctlr_mutex);
+
+ if (link_dropped)
+ fc_linkdown(fip->lp);
+ return link_dropped;
+}
+EXPORT_SYMBOL(fcoe_ctlr_link_down);
+
+/**
+ * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF
+ * @fip: The FCoE controller to send the FKA on
+ * @lport: libfc fc_lport to send from
+ * @ports: 0 for controller keep-alive, 1 for port keep-alive
+ * @sa: The source MAC address
+ *
+ * A controller keep-alive is sent every fka_period (typically 8 seconds).
+ * The source MAC is the native MAC address.
+ *
+ * A port keep-alive is sent every 90 seconds while logged in.
+ * The source MAC is the assigned mapped source address.
+ * The destination is the FCF's F-port.
+ */
+static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip,
+ struct fc_lport *lport,
+ int ports, u8 *sa)
+{
+ struct sk_buff *skb;
+ struct fip_kal {
+ struct ethhdr eth;
+ struct fip_header fip;
+ struct fip_mac_desc mac;
+ } __packed * kal;
+ struct fip_vn_desc *vn;
+ u32 len;
+ struct fc_lport *lp;
+ struct fcoe_fcf *fcf;
+
+ fcf = fip->sel_fcf;
+ lp = fip->lp;
+ if (!fcf || (ports && !lp->port_id))
+ return;
+
+ len = sizeof(*kal) + ports * sizeof(*vn);
+ skb = dev_alloc_skb(len);
+ if (!skb)
+ return;
+
+ kal = (struct fip_kal *)skb->data;
+ memset(kal, 0, len);
+ memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN);
+ memcpy(kal->eth.h_source, sa, ETH_ALEN);
+ kal->eth.h_proto = htons(ETH_P_FIP);
+
+ kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
+ kal->fip.fip_op = htons(FIP_OP_CTRL);
+ kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE;
+ kal->fip.fip_dl_len = htons((sizeof(kal->mac) +
+ ports * sizeof(*vn)) / FIP_BPW);
+ kal->fip.fip_flags = htons(FIP_FL_FPMA);
+ if (fip->spma)
+ kal->fip.fip_flags |= htons(FIP_FL_SPMA);
+
+ kal->mac.fd_desc.fip_dtype = FIP_DT_MAC;
+ kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW;
+ memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
+ if (ports) {
+ vn = (struct fip_vn_desc *)(kal + 1);
+ vn->fd_desc.fip_dtype = FIP_DT_VN_ID;
+ vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW;
+ memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN);
+ hton24(vn->fd_fc_id, lport->port_id);
+ put_unaligned_be64(lport->wwpn, &vn->fd_wwpn);
+ }
+ skb_put(skb, len);
+ skb->protocol = htons(ETH_P_FIP);
+ skb->priority = fip->priority;
+ skb_reset_mac_header(skb);
+ skb_reset_network_header(skb);
+ fip->send(fip, skb);
+}
+
+/**
+ * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it
+ * @fip: The FCoE controller for the ELS frame
+ * @dtype: The FIP descriptor type for the frame
+ * @skb: The FCoE ELS frame including FC header but no FCoE headers
+ * @d_id: The destination port ID.
+ *
+ * Returns non-zero error code on failure.
+ *
+ * The caller must check that the length is a multiple of 4.
+ *
+ * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes).
+ * Headroom includes the FIP encapsulation description, FIP header, and
+ * Ethernet header. The tailroom is for the FIP MAC descriptor.
+ */
+static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport,
+ u8 dtype, struct sk_buff *skb, u32 d_id)
+{
+ struct fip_encaps_head {
+ struct ethhdr eth;
+ struct fip_header fip;
+ struct fip_encaps encaps;
+ } __packed * cap;
+ struct fc_frame_header *fh;
+ struct fip_mac_desc *mac;
+ struct fcoe_fcf *fcf;
+ size_t dlen;
+ u16 fip_flags;
+ u8 op;
+
+ fh = (struct fc_frame_header *)skb->data;
+ op = *(u8 *)(fh + 1);
+ dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */
+ cap = skb_push(skb, sizeof(*cap));
+ memset(cap, 0, sizeof(*cap));
+
+ if (lport->point_to_multipoint) {
+ if (fcoe_ctlr_vn_lookup(fip, d_id, cap->eth.h_dest))
+ return -ENODEV;
+ fip_flags = 0;
+ } else {
+ fcf = fip->sel_fcf;
+ if (!fcf)
+ return -ENODEV;
+ fip_flags = fcf->flags;
+ fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA :
+ FIP_FL_FPMA;
+ if (!fip_flags)
+ return -ENODEV;
+ memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN);
+ }
+ memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
+ cap->eth.h_proto = htons(ETH_P_FIP);
+
+ cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
+ cap->fip.fip_op = htons(FIP_OP_LS);
+ if (op == ELS_LS_ACC || op == ELS_LS_RJT)
+ cap->fip.fip_subcode = FIP_SC_REP;
+ else
+ cap->fip.fip_subcode = FIP_SC_REQ;
+ cap->fip.fip_flags = htons(fip_flags);
+
+ cap->encaps.fd_desc.fip_dtype = dtype;
+ cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW;
+
+ if (op != ELS_LS_RJT) {
+ dlen += sizeof(*mac);
+ mac = skb_put_zero(skb, sizeof(*mac));
+ mac->fd_desc.fip_dtype = FIP_DT_MAC;
+ mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW;
+ if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) {
+ memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN);
+ } else if (fip->mode == FIP_MODE_VN2VN) {
+ hton24(mac->fd_mac, FIP_VN_FC_MAP);
+ hton24(mac->fd_mac + 3, fip->port_id);
+ } else if (fip_flags & FIP_FL_SPMA) {
+ LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with SPMA\n");
+ memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN);
+ } else {
+ LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with FPMA\n");
+ /* FPMA only FLOGI. Must leave the MAC desc zeroed. */
+ }
+ }
+ cap->fip.fip_dl_len = htons(dlen / FIP_BPW);
+
+ skb->protocol = htons(ETH_P_FIP);
+ skb->priority = fip->priority;
+ skb_reset_mac_header(skb);
+ skb_reset_network_header(skb);
+ return 0;
+}
+
+/**
+ * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate.
+ * @fip: FCoE controller.
+ * @lport: libfc fc_lport to send from
+ * @skb: FCoE ELS frame including FC header but no FCoE headers.
+ *
+ * Returns a non-zero error code if the frame should not be sent.
+ * Returns zero if the caller should send the frame with FCoE encapsulation.
+ *
+ * The caller must check that the length is a multiple of 4.
+ * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes).
+ * The the skb must also be an fc_frame.
+ *
+ * This is called from the lower-level driver with spinlocks held,
+ * so we must not take a mutex here.
+ */
+int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport,
+ struct sk_buff *skb)
+{
+ struct fc_frame *fp;
+ struct fc_frame_header *fh;
+ u16 old_xid;
+ u8 op;
+ u8 mac[ETH_ALEN];
+
+ fp = container_of(skb, struct fc_frame, skb);
+ fh = (struct fc_frame_header *)skb->data;
+ op = *(u8 *)(fh + 1);
+
+ if (op == ELS_FLOGI && fip->mode != FIP_MODE_VN2VN) {
+ old_xid = fip->flogi_oxid;
+ fip->flogi_oxid = ntohs(fh->fh_ox_id);
+ if (fip->state == FIP_ST_AUTO) {
+ if (old_xid == FC_XID_UNKNOWN)
+ fip->flogi_count = 0;
+ fip->flogi_count++;
+ if (fip->flogi_count < 3)
+ goto drop;
+ fcoe_ctlr_map_dest(fip);
+ return 0;
+ }
+ if (fip->state == FIP_ST_NON_FIP)
+ fcoe_ctlr_map_dest(fip);
+ }
+
+ if (fip->state == FIP_ST_NON_FIP)
+ return 0;
+ if (!fip->sel_fcf && fip->mode != FIP_MODE_VN2VN)
+ goto drop;
+ switch (op) {
+ case ELS_FLOGI:
+ op = FIP_DT_FLOGI;
+ if (fip->mode == FIP_MODE_VN2VN)
+ break;
+ spin_lock_bh(&fip->ctlr_lock);
+ kfree_skb(fip->flogi_req);
+ fip->flogi_req = skb;
+ fip->flogi_req_send = 1;
+ spin_unlock_bh(&fip->ctlr_lock);
+ schedule_work(&fip->timer_work);
+ return -EINPROGRESS;
+ case ELS_FDISC:
+ if (ntoh24(fh->fh_s_id))
+ return 0;
+ op = FIP_DT_FDISC;
+ break;
+ case ELS_LOGO:
+ if (fip->mode == FIP_MODE_VN2VN) {
+ if (fip->state != FIP_ST_VNMP_UP)
+ goto drop;
+ if (ntoh24(fh->fh_d_id) == FC_FID_FLOGI)
+ goto drop;
+ } else {
+ if (fip->state != FIP_ST_ENABLED)
+ return 0;
+ if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
+ return 0;
+ }
+ op = FIP_DT_LOGO;
+ break;
+ case ELS_LS_ACC:
+ /*
+ * If non-FIP, we may have gotten an SID by accepting an FLOGI
+ * from a point-to-point connection. Switch to using
+ * the source mac based on the SID. The destination
+ * MAC in this case would have been set by receiving the
+ * FLOGI.
+ */
+ if (fip->state == FIP_ST_NON_FIP) {
+ if (fip->flogi_oxid == FC_XID_UNKNOWN)
+ return 0;
+ fip->flogi_oxid = FC_XID_UNKNOWN;
+ fc_fcoe_set_mac(mac, fh->fh_d_id);
+ fip->update_mac(lport, mac);
+ }
+ /* fall through */
+ case ELS_LS_RJT:
+ op = fr_encaps(fp);
+ if (op)
+ break;
+ return 0;
+ default:
+ if (fip->state != FIP_ST_ENABLED &&
+ fip->state != FIP_ST_VNMP_UP)
+ goto drop;
+ return 0;
+ }
+ LIBFCOE_FIP_DBG(fip, "els_send op %u d_id %x\n",
+ op, ntoh24(fh->fh_d_id));
+ if (fcoe_ctlr_encaps(fip, lport, op, skb, ntoh24(fh->fh_d_id)))
+ goto drop;
+ fip->send(fip, skb);
+ return -EINPROGRESS;
+drop:
+ LIBFCOE_FIP_DBG(fip, "drop els_send op %u d_id %x\n",
+ op, ntoh24(fh->fh_d_id));
+ kfree_skb(skb);
+ return -EINVAL;
+}
+EXPORT_SYMBOL(fcoe_ctlr_els_send);
+
+/**
+ * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller
+ * @fip: The FCoE controller to free FCFs on
+ *
+ * Called with lock held and preemption disabled.
+ *
+ * An FCF is considered old if we have missed two advertisements.
+ * That is, there have been no valid advertisement from it for 2.5
+ * times its keep-alive period.
+ *
+ * In addition, determine the time when an FCF selection can occur.
+ *
+ * Also, increment the MissDiscAdvCount when no advertisement is received
+ * for the corresponding FCF for 1.5 * FKA_ADV_PERIOD (FC-BB-5 LESB).
+ *
+ * Returns the time in jiffies for the next call.
+ */
+static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
+{
+ struct fcoe_fcf *fcf;
+ struct fcoe_fcf *next;
+ unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD);
+ unsigned long deadline;
+ unsigned long sel_time = 0;
+ struct list_head del_list;
+ struct fc_stats *stats;
+
+ INIT_LIST_HEAD(&del_list);
+
+ stats = per_cpu_ptr(fip->lp->stats, get_cpu());
+
+ list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
+ deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2;
+ if (fip->sel_fcf == fcf) {
+ if (time_after(jiffies, deadline)) {
+ stats->MissDiscAdvCount++;
+ printk(KERN_INFO "libfcoe: host%d: "
+ "Missing Discovery Advertisement "
+ "for fab %16.16llx count %lld\n",
+ fip->lp->host->host_no, fcf->fabric_name,
+ stats->MissDiscAdvCount);
+ } else if (time_after(next_timer, deadline))
+ next_timer = deadline;
+ }
+
+ deadline += fcf->fka_period;
+ if (time_after_eq(jiffies, deadline)) {
+ if (fip->sel_fcf == fcf)
+ fip->sel_fcf = NULL;
+ /*
+ * Move to delete list so we can call
+ * fcoe_sysfs_fcf_del (which can sleep)
+ * after the put_cpu().
+ */
+ list_del(&fcf->list);
+ list_add(&fcf->list, &del_list);
+ stats->VLinkFailureCount++;
+ } else {
+ if (time_after(next_timer, deadline))
+ next_timer = deadline;
+ if (fcoe_ctlr_mtu_valid(fcf) &&
+ (!sel_time || time_before(sel_time, fcf->time)))
+ sel_time = fcf->time;
+ }
+ }
+ put_cpu();
+
+ list_for_each_entry_safe(fcf, next, &del_list, list) {
+ /* Removes fcf from current list */
+ fcoe_sysfs_fcf_del(fcf);
+ }
+
+ if (sel_time && !fip->sel_fcf && !fip->sel_time) {
+ sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY);
+ fip->sel_time = sel_time;
+ }
+
+ return next_timer;
+}
+
+/**
+ * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry
+ * @fip: The FCoE controller receiving the advertisement
+ * @skb: The received FIP advertisement frame
+ * @fcf: The resulting FCF entry
+ *
+ * Returns zero on a valid parsed advertisement,
+ * otherwise returns non zero value.
+ */
+static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip,
+ struct sk_buff *skb, struct fcoe_fcf *fcf)
+{
+ struct fip_header *fiph;
+ struct fip_desc *desc = NULL;
+ struct fip_wwn_desc *wwn;
+ struct fip_fab_desc *fab;
+ struct fip_fka_desc *fka;
+ unsigned long t;
+ size_t rlen;
+ size_t dlen;
+ u32 desc_mask;
+
+ memset(fcf, 0, sizeof(*fcf));
+ fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA);
+
+ fiph = (struct fip_header *)skb->data;
+ fcf->flags = ntohs(fiph->fip_flags);
+
+ /*
+ * mask of required descriptors. validating each one clears its bit.
+ */
+ desc_mask = BIT(FIP_DT_PRI) | BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
+ BIT(FIP_DT_FAB) | BIT(FIP_DT_FKA);
+
+ rlen = ntohs(fiph->fip_dl_len) * 4;
+ if (rlen + sizeof(*fiph) > skb->len)
+ return -EINVAL;
+
+ desc = (struct fip_desc *)(fiph + 1);
+ while (rlen > 0) {
+ dlen = desc->fip_dlen * FIP_BPW;
+ if (dlen < sizeof(*desc) || dlen > rlen)
+ return -EINVAL;
+ /* Drop Adv if there are duplicate critical descriptors */
+ if ((desc->fip_dtype < 32) &&
+ !(desc_mask & 1U << desc->fip_dtype)) {
+ LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
+ "Descriptors in FIP adv\n");
+ return -EINVAL;
+ }
+ switch (desc->fip_dtype) {
+ case FIP_DT_PRI:
+ if (dlen != sizeof(struct fip_pri_desc))
+ goto len_err;
+ fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri;
+ desc_mask &= ~BIT(FIP_DT_PRI);
+ break;
+ case FIP_DT_MAC:
+ if (dlen != sizeof(struct fip_mac_desc))
+ goto len_err;
+ memcpy(fcf->fcf_mac,
+ ((struct fip_mac_desc *)desc)->fd_mac,
+ ETH_ALEN);
+ memcpy(fcf->fcoe_mac, fcf->fcf_mac, ETH_ALEN);
+ if (!is_valid_ether_addr(fcf->fcf_mac)) {
+ LIBFCOE_FIP_DBG(fip,
+ "Invalid MAC addr %pM in FIP adv\n",
+ fcf->fcf_mac);
+ return -EINVAL;
+ }
+ desc_mask &= ~BIT(FIP_DT_MAC);
+ break;
+ case FIP_DT_NAME:
+ if (dlen != sizeof(struct fip_wwn_desc))
+ goto len_err;
+ wwn = (struct fip_wwn_desc *)desc;
+ fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn);
+ desc_mask &= ~BIT(FIP_DT_NAME);
+ break;
+ case FIP_DT_FAB:
+ if (dlen != sizeof(struct fip_fab_desc))
+ goto len_err;
+ fab = (struct fip_fab_desc *)desc;
+ fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn);
+ fcf->vfid = ntohs(fab->fd_vfid);
+ fcf->fc_map = ntoh24(fab->fd_map);
+ desc_mask &= ~BIT(FIP_DT_FAB);
+ break;
+ case FIP_DT_FKA:
+ if (dlen != sizeof(struct fip_fka_desc))
+ goto len_err;
+ fka = (struct fip_fka_desc *)desc;
+ if (fka->fd_flags & FIP_FKA_ADV_D)
+ fcf->fd_flags = 1;
+ t = ntohl(fka->fd_fka_period);
+ if (t >= FCOE_CTLR_MIN_FKA)
+ fcf->fka_period = msecs_to_jiffies(t);
+ desc_mask &= ~BIT(FIP_DT_FKA);
+ break;
+ case FIP_DT_MAP_OUI:
+ case FIP_DT_FCOE_SIZE:
+ case FIP_DT_FLOGI:
+ case FIP_DT_FDISC:
+ case FIP_DT_LOGO:
+ case FIP_DT_ELP:
+ default:
+ LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
+ "in FIP adv\n", desc->fip_dtype);
+ /* standard says ignore unknown descriptors >= 128 */
+ if (desc->fip_dtype < FIP_DT_NON_CRITICAL)
+ return -EINVAL;
+ break;
+ }
+ desc = (struct fip_desc *)((char *)desc + dlen);
+ rlen -= dlen;
+ }
+ if (!fcf->fc_map || (fcf->fc_map & 0x10000))
+ return -EINVAL;
+ if (!fcf->switch_name)
+ return -EINVAL;
+ if (desc_mask) {
+ LIBFCOE_FIP_DBG(fip, "adv missing descriptors mask %x\n",
+ desc_mask);
+ return -EINVAL;
+ }
+ return 0;
+
+len_err:
+ LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
+ desc->fip_dtype, dlen);
+ return -EINVAL;
+}
+
+/**
+ * fcoe_ctlr_recv_adv() - Handle an incoming advertisement
+ * @fip: The FCoE controller receiving the advertisement
+ * @skb: The received FIP packet
+ */
+static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb)
+{
+ struct fcoe_fcf *fcf;
+ struct fcoe_fcf new;
+ unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV);
+ int first = 0;
+ int mtu_valid;
+ int found = 0;
+ int rc = 0;
+
+ if (fcoe_ctlr_parse_adv(fip, skb, &new))
+ return;
+
+ mutex_lock(&fip->ctlr_mutex);
+ first = list_empty(&fip->fcfs);
+ list_for_each_entry(fcf, &fip->fcfs, list) {
+ if (fcf->switch_name == new.switch_name &&
+ fcf->fabric_name == new.fabric_name &&
+ fcf->fc_map == new.fc_map &&
+ ether_addr_equal(fcf->fcf_mac, new.fcf_mac)) {
+ found = 1;
+ break;
+ }
+ }
+ if (!found) {
+ if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT)
+ goto out;
+
+ fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC);
+ if (!fcf)
+ goto out;
+
+ memcpy(fcf, &new, sizeof(new));
+ fcf->fip = fip;
+ rc = fcoe_sysfs_fcf_add(fcf);
+ if (rc) {
+ printk(KERN_ERR "Failed to allocate sysfs instance "
+ "for FCF, fab %16.16llx mac %pM\n",
+ new.fabric_name, new.fcf_mac);
+ kfree(fcf);
+ goto out;
+ }
+ } else {
+ /*
+ * Update the FCF's keep-alive descriptor flags.
+ * Other flag changes from new advertisements are
+ * ignored after a solicited advertisement is
+ * received and the FCF is selectable (usable).
+ */
+ fcf->fd_flags = new.fd_flags;
+ if (!fcoe_ctlr_fcf_usable(fcf))
+ fcf->flags = new.flags;
+
+ if (fcf == fip->sel_fcf && !fcf->fd_flags) {
+ fip->ctlr_ka_time -= fcf->fka_period;
+ fip->ctlr_ka_time += new.fka_period;
+ if (time_before(fip->ctlr_ka_time, fip->timer.expires))
+ mod_timer(&fip->timer, fip->ctlr_ka_time);
+ }
+ fcf->fka_period = new.fka_period;
+ memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN);
+ }
+
+ mtu_valid = fcoe_ctlr_mtu_valid(fcf);
+ fcf->time = jiffies;
+ if (!found)
+ LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n",
+ fcf->fabric_name, fcf->fcf_mac);
+
+ /*
+ * If this advertisement is not solicited and our max receive size
+ * hasn't been verified, send a solicited advertisement.
+ */
+ if (!mtu_valid)
+ fcoe_ctlr_solicit(fip, fcf);
+
+ /*
+ * If its been a while since we did a solicit, and this is
+ * the first advertisement we've received, do a multicast
+ * solicitation to gather as many advertisements as we can
+ * before selection occurs.
+ */
+ if (first && time_after(jiffies, fip->sol_time + sol_tov))
+ fcoe_ctlr_solicit(fip, NULL);
+
+ /*
+ * Put this FCF at the head of the list for priority among equals.
+ * This helps in the case of an NPV switch which insists we use
+ * the FCF that answers multicast solicitations, not the others that
+ * are sending periodic multicast advertisements.
+ */
+ if (mtu_valid)
+ list_move(&fcf->list, &fip->fcfs);
+
+ /*
+ * If this is the first validated FCF, note the time and
+ * set a timer to trigger selection.
+ */
+ if (mtu_valid && !fip->sel_fcf && !fip->sel_time &&
+ fcoe_ctlr_fcf_usable(fcf)) {
+ fip->sel_time = jiffies +
+ msecs_to_jiffies(FCOE_CTLR_START_DELAY);
+ if (!timer_pending(&fip->timer) ||
+ time_before(fip->sel_time, fip->timer.expires))
+ mod_timer(&fip->timer, fip->sel_time);
+ }
+
+out:
+ mutex_unlock(&fip->ctlr_mutex);
+}
+
+/**
+ * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame
+ * @fip: The FCoE controller which received the packet
+ * @skb: The received FIP packet
+ */
+static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
+{
+ struct fc_lport *lport = fip->lp;
+ struct fip_header *fiph;
+ struct fc_frame *fp = (struct fc_frame *)skb;
+ struct fc_frame_header *fh = NULL;
+ struct fip_desc *desc;
+ struct fip_encaps *els;
+ struct fcoe_fcf *sel;
+ struct fc_stats *stats;
+ enum fip_desc_type els_dtype = 0;
+ u8 els_op;
+ u8 sub;
+ u8 granted_mac[ETH_ALEN] = { 0 };
+ size_t els_len = 0;
+ size_t rlen;
+ size_t dlen;
+ u32 desc_mask = 0;
+ u32 desc_cnt = 0;
+
+ fiph = (struct fip_header *)skb->data;
+ sub = fiph->fip_subcode;
+ if (sub != FIP_SC_REQ && sub != FIP_SC_REP)
+ goto drop;
+
+ rlen = ntohs(fiph->fip_dl_len) * 4;
+ if (rlen + sizeof(*fiph) > skb->len)
+ goto drop;
+
+ desc = (struct fip_desc *)(fiph + 1);
+ while (rlen > 0) {
+ desc_cnt++;
+ dlen = desc->fip_dlen * FIP_BPW;
+ if (dlen < sizeof(*desc) || dlen > rlen)
+ goto drop;
+ /* Drop ELS if there are duplicate critical descriptors */
+ if (desc->fip_dtype < 32) {
+ if ((desc->fip_dtype != FIP_DT_MAC) &&
+ (desc_mask & 1U << desc->fip_dtype)) {
+ LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
+ "Descriptors in FIP ELS\n");
+ goto drop;
+ }
+ desc_mask |= (1 << desc->fip_dtype);
+ }
+ switch (desc->fip_dtype) {
+ case FIP_DT_MAC:
+ sel = fip->sel_fcf;
+ if (desc_cnt == 1) {
+ LIBFCOE_FIP_DBG(fip, "FIP descriptors "
+ "received out of order\n");
+ goto drop;
+ }
+ /*
+ * Some switch implementations send two MAC descriptors,
+ * with first MAC(granted_mac) being the FPMA, and the
+ * second one(fcoe_mac) is used as destination address
+ * for sending/receiving FCoE packets. FIP traffic is
+ * sent using fip_mac. For regular switches, both
+ * fip_mac and fcoe_mac would be the same.
+ */
+ if (desc_cnt == 2)
+ memcpy(granted_mac,
+ ((struct fip_mac_desc *)desc)->fd_mac,
+ ETH_ALEN);
+
+ if (dlen != sizeof(struct fip_mac_desc))
+ goto len_err;
+
+ if ((desc_cnt == 3) && (sel))
+ memcpy(sel->fcoe_mac,
+ ((struct fip_mac_desc *)desc)->fd_mac,
+ ETH_ALEN);
+ break;
+ case FIP_DT_FLOGI:
+ case FIP_DT_FDISC:
+ case FIP_DT_LOGO:
+ case FIP_DT_ELP:
+ if (desc_cnt != 1) {
+ LIBFCOE_FIP_DBG(fip, "FIP descriptors "
+ "received out of order\n");
+ goto drop;
+ }
+ if (fh)
+ goto drop;
+ if (dlen < sizeof(*els) + sizeof(*fh) + 1)
+ goto len_err;
+ els_len = dlen - sizeof(*els);
+ els = (struct fip_encaps *)desc;
+ fh = (struct fc_frame_header *)(els + 1);
+ els_dtype = desc->fip_dtype;
+ break;
+ default:
+ LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
+ "in FIP adv\n", desc->fip_dtype);
+ /* standard says ignore unknown descriptors >= 128 */
+ if (desc->fip_dtype < FIP_DT_NON_CRITICAL)
+ goto drop;
+ if (desc_cnt <= 2) {
+ LIBFCOE_FIP_DBG(fip, "FIP descriptors "
+ "received out of order\n");
+ goto drop;
+ }
+ break;
+ }
+ desc = (struct fip_desc *)((char *)desc + dlen);
+ rlen -= dlen;
+ }
+
+ if (!fh)
+ goto drop;
+ els_op = *(u8 *)(fh + 1);
+
+ if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) &&
+ sub == FIP_SC_REP && fip->mode != FIP_MODE_VN2VN) {
+ if (els_op == ELS_LS_ACC) {
+ if (!is_valid_ether_addr(granted_mac)) {
+ LIBFCOE_FIP_DBG(fip,
+ "Invalid MAC address %pM in FIP ELS\n",
+ granted_mac);
+ goto drop;
+ }
+ memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN);
+
+ if (fip->flogi_oxid == ntohs(fh->fh_ox_id)) {
+ fip->flogi_oxid = FC_XID_UNKNOWN;
+ if (els_dtype == FIP_DT_FLOGI)
+ fcoe_ctlr_announce(fip);
+ }
+ } else if (els_dtype == FIP_DT_FLOGI &&
+ !fcoe_ctlr_flogi_retry(fip))
+ goto drop; /* retrying FLOGI so drop reject */
+ }
+
+ if ((desc_cnt == 0) || ((els_op != ELS_LS_RJT) &&
+ (!(1U << FIP_DT_MAC & desc_mask)))) {
+ LIBFCOE_FIP_DBG(fip, "Missing critical descriptors "
+ "in FIP ELS\n");
+ goto drop;
+ }
+
+ /*
+ * Convert skb into an fc_frame containing only the ELS.
+ */
+ skb_pull(skb, (u8 *)fh - skb->data);
+ skb_trim(skb, els_len);
+ fp = (struct fc_frame *)skb;
+ fc_frame_init(fp);
+ fr_sof(fp) = FC_SOF_I3;
+ fr_eof(fp) = FC_EOF_T;
+ fr_dev(fp) = lport;
+ fr_encaps(fp) = els_dtype;
+
+ stats = per_cpu_ptr(lport->stats, get_cpu());
+ stats->RxFrames++;
+ stats->RxWords += skb->len / FIP_BPW;
+ put_cpu();
+
+ fc_exch_recv(lport, fp);
+ return;
+
+len_err:
+ LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
+ desc->fip_dtype, dlen);
+drop:
+ kfree_skb(skb);
+}
+
+/**
+ * fcoe_ctlr_recv_els() - Handle an incoming link reset frame
+ * @fip: The FCoE controller that received the frame
+ * @fh: The received FIP header
+ *
+ * There may be multiple VN_Port descriptors.
+ * The overall length has already been checked.
+ */
+static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
+ struct sk_buff *skb)
+{
+ struct fip_desc *desc;
+ struct fip_mac_desc *mp;
+ struct fip_wwn_desc *wp;
+ struct fip_vn_desc *vp;
+ size_t rlen;
+ size_t dlen;
+ struct fcoe_fcf *fcf = fip->sel_fcf;
+ struct fc_lport *lport = fip->lp;
+ struct fc_lport *vn_port = NULL;
+ u32 desc_mask;
+ int num_vlink_desc;
+ int reset_phys_port = 0;
+ struct fip_vn_desc **vlink_desc_arr = NULL;
+ struct fip_header *fh = (struct fip_header *)skb->data;
+ struct ethhdr *eh = eth_hdr(skb);
+
+ LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n");
+
+ if (!fcf) {
+ /*
+ * We are yet to select best FCF, but we got CVL in the
+ * meantime. reset the ctlr and let it rediscover the FCF
+ */
+ LIBFCOE_FIP_DBG(fip, "Resetting fcoe_ctlr as FCF has not been "
+ "selected yet\n");
+ mutex_lock(&fip->ctlr_mutex);
+ fcoe_ctlr_reset(fip);
+ mutex_unlock(&fip->ctlr_mutex);
+ return;
+ }
+
+ /*
+ * If we've selected an FCF check that the CVL is from there to avoid
+ * processing CVLs from an unexpected source. If it is from an
+ * unexpected source drop it on the floor.
+ */
+ if (!ether_addr_equal(eh->h_source, fcf->fcf_mac)) {
+ LIBFCOE_FIP_DBG(fip, "Dropping CVL due to source address "
+ "mismatch with FCF src=%pM\n", eh->h_source);
+ return;
+ }
+
+ /*
+ * If we haven't logged into the fabric but receive a CVL we should
+ * reset everything and go back to solicitation.
+ */
+ if (!lport->port_id) {
+ LIBFCOE_FIP_DBG(fip, "lport not logged in, resoliciting\n");
+ mutex_lock(&fip->ctlr_mutex);
+ fcoe_ctlr_reset(fip);
+ mutex_unlock(&fip->ctlr_mutex);
+ fc_lport_reset(fip->lp);
+ fcoe_ctlr_solicit(fip, NULL);
+ return;
+ }
+
+ /*
+ * mask of required descriptors. Validating each one clears its bit.
+ */
+ desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME);
+
+ rlen = ntohs(fh->fip_dl_len) * FIP_BPW;
+ desc = (struct fip_desc *)(fh + 1);
+
+ /*
+ * Actually need to subtract 'sizeof(*mp) - sizeof(*wp)' from 'rlen'
+ * before determining max Vx_Port descriptor but a buggy FCF could have
+ * omitted either or both MAC Address and Name Identifier descriptors
+ */
+ num_vlink_desc = rlen / sizeof(*vp);
+ if (num_vlink_desc)
+ vlink_desc_arr = kmalloc_array(num_vlink_desc, sizeof(vp),
+ GFP_ATOMIC);
+ if (!vlink_desc_arr)
+ return;
+ num_vlink_desc = 0;
+
+ while (rlen >= sizeof(*desc)) {
+ dlen = desc->fip_dlen * FIP_BPW;
+ if (dlen > rlen)
+ goto err;
+ /* Drop CVL if there are duplicate critical descriptors */
+ if ((desc->fip_dtype < 32) &&
+ (desc->fip_dtype != FIP_DT_VN_ID) &&
+ !(desc_mask & 1U << desc->fip_dtype)) {
+ LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
+ "Descriptors in FIP CVL\n");
+ goto err;
+ }
+ switch (desc->fip_dtype) {
+ case FIP_DT_MAC:
+ mp = (struct fip_mac_desc *)desc;
+ if (dlen < sizeof(*mp))
+ goto err;
+ if (!ether_addr_equal(mp->fd_mac, fcf->fcf_mac))
+ goto err;
+ desc_mask &= ~BIT(FIP_DT_MAC);
+ break;
+ case FIP_DT_NAME:
+ wp = (struct fip_wwn_desc *)desc;
+ if (dlen < sizeof(*wp))
+ goto err;
+ if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name)
+ goto err;
+ desc_mask &= ~BIT(FIP_DT_NAME);
+ break;
+ case FIP_DT_VN_ID:
+ vp = (struct fip_vn_desc *)desc;
+ if (dlen < sizeof(*vp))
+ goto err;
+ vlink_desc_arr[num_vlink_desc++] = vp;
+ vn_port = fc_vport_id_lookup(lport,
+ ntoh24(vp->fd_fc_id));
+ if (vn_port && (vn_port == lport)) {
+ mutex_lock(&fip->ctlr_mutex);
+ per_cpu_ptr(lport->stats,
+ get_cpu())->VLinkFailureCount++;
+ put_cpu();
+ fcoe_ctlr_reset(fip);
+ mutex_unlock(&fip->ctlr_mutex);
+ }
+ break;
+ default:
+ /* standard says ignore unknown descriptors >= 128 */
+ if (desc->fip_dtype < FIP_DT_NON_CRITICAL)
+ goto err;
+ break;
+ }
+ desc = (struct fip_desc *)((char *)desc + dlen);
+ rlen -= dlen;
+ }
+
+ /*
+ * reset only if all required descriptors were present and valid.
+ */
+ if (desc_mask)
+ LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n",
+ desc_mask);
+ else if (!num_vlink_desc) {
+ LIBFCOE_FIP_DBG(fip, "CVL: no Vx_Port descriptor found\n");
+ /*
+ * No Vx_Port description. Clear all NPIV ports,
+ * followed by physical port
+ */
+ mutex_lock(&fip->ctlr_mutex);
+ per_cpu_ptr(lport->stats, get_cpu())->VLinkFailureCount++;
+ put_cpu();
+ fcoe_ctlr_reset(fip);
+ mutex_unlock(&fip->ctlr_mutex);
+
+ mutex_lock(&lport->lp_mutex);
+ list_for_each_entry(vn_port, &lport->vports, list)
+ fc_lport_reset(vn_port);
+ mutex_unlock(&lport->lp_mutex);
+
+ fc_lport_reset(fip->lp);
+ fcoe_ctlr_solicit(fip, NULL);
+ } else {
+ int i;
+
+ LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n");
+ for (i = 0; i < num_vlink_desc; i++) {
+ vp = vlink_desc_arr[i];
+ vn_port = fc_vport_id_lookup(lport,
+ ntoh24(vp->fd_fc_id));
+ if (!vn_port)
+ continue;
+
+ /*
+ * 'port_id' is already validated, check MAC address and
+ * wwpn
+ */
+ if (!ether_addr_equal(fip->get_src_addr(vn_port),
+ vp->fd_mac) ||
+ get_unaligned_be64(&vp->fd_wwpn) !=
+ vn_port->wwpn)
+ continue;
+
+ if (vn_port == lport)
+ /*
+ * Physical port, defer processing till all
+ * listed NPIV ports are cleared
+ */
+ reset_phys_port = 1;
+ else /* NPIV port */
+ fc_lport_reset(vn_port);
+ }
+
+ if (reset_phys_port) {
+ fc_lport_reset(fip->lp);
+ fcoe_ctlr_solicit(fip, NULL);
+ }
+ }
+
+err:
+ kfree(vlink_desc_arr);
+}
+
+/**
+ * fcoe_ctlr_recv() - Receive a FIP packet
+ * @fip: The FCoE controller that received the packet
+ * @skb: The received FIP packet
+ *
+ * This may be called from either NET_RX_SOFTIRQ or IRQ.
+ */
+void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
+{
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (!skb)
+ return;
+ skb_queue_tail(&fip->fip_recv_list, skb);
+ schedule_work(&fip->recv_work);
+}
+EXPORT_SYMBOL(fcoe_ctlr_recv);
+
+/**
+ * fcoe_ctlr_recv_handler() - Receive a FIP frame
+ * @fip: The FCoE controller that received the frame
+ * @skb: The received FIP frame
+ *
+ * Returns non-zero if the frame is dropped.
+ */
+static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb)
+{
+ struct fip_header *fiph;
+ struct ethhdr *eh;
+ enum fip_state state;
+ bool fip_vlan_resp = false;
+ u16 op;
+ u8 sub;
+
+ if (skb_linearize(skb))
+ goto drop;
+ if (skb->len < sizeof(*fiph))
+ goto drop;
+ eh = eth_hdr(skb);
+ if (fip->mode == FIP_MODE_VN2VN) {
+ if (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) &&
+ !ether_addr_equal(eh->h_dest, fcoe_all_vn2vn) &&
+ !ether_addr_equal(eh->h_dest, fcoe_all_p2p))
+ goto drop;
+ } else if (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) &&
+ !ether_addr_equal(eh->h_dest, fcoe_all_enode))
+ goto drop;
+ fiph = (struct fip_header *)skb->data;
+ op = ntohs(fiph->fip_op);
+ sub = fiph->fip_subcode;
+
+ if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
+ goto drop;
+ if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
+ goto drop;
+
+ mutex_lock(&fip->ctlr_mutex);
+ state = fip->state;
+ if (state == FIP_ST_AUTO) {
+ fip->map_dest = 0;
+ fcoe_ctlr_set_state(fip, FIP_ST_ENABLED);
+ state = FIP_ST_ENABLED;
+ LIBFCOE_FIP_DBG(fip, "Using FIP mode\n");
+ }
+ fip_vlan_resp = fip->fip_resp;
+ mutex_unlock(&fip->ctlr_mutex);
+
+ if (fip->mode == FIP_MODE_VN2VN && op == FIP_OP_VN2VN)
+ return fcoe_ctlr_vn_recv(fip, skb);
+
+ if (fip_vlan_resp && op == FIP_OP_VLAN) {
+ LIBFCOE_FIP_DBG(fip, "fip vlan discovery\n");
+ return fcoe_ctlr_vlan_recv(fip, skb);
+ }
+
+ if (state != FIP_ST_ENABLED && state != FIP_ST_VNMP_UP &&
+ state != FIP_ST_VNMP_CLAIM)
+ goto drop;
+
+ if (op == FIP_OP_LS) {
+ fcoe_ctlr_recv_els(fip, skb); /* consumes skb */
+ return 0;
+ }
+
+ if (state != FIP_ST_ENABLED)
+ goto drop;
+
+ if (op == FIP_OP_DISC && sub == FIP_SC_ADV)
+ fcoe_ctlr_recv_adv(fip, skb);
+ else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK)
+ fcoe_ctlr_recv_clr_vlink(fip, skb);
+ kfree_skb(skb);
+ return 0;
+drop:
+ kfree_skb(skb);
+ return -1;
+}
+
+/**
+ * fcoe_ctlr_select() - Select the best FCF (if possible)
+ * @fip: The FCoE controller
+ *
+ * Returns the selected FCF, or NULL if none are usable.
+ *
+ * If there are conflicting advertisements, no FCF can be chosen.
+ *
+ * If there is already a selected FCF, this will choose a better one or
+ * an equivalent one that hasn't already been sent a FLOGI.
+ *
+ * Called with lock held.
+ */
+static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip)
+{
+ struct fcoe_fcf *fcf;
+ struct fcoe_fcf *best = fip->sel_fcf;
+
+ list_for_each_entry(fcf, &fip->fcfs, list) {
+ LIBFCOE_FIP_DBG(fip, "consider FCF fab %16.16llx "
+ "VFID %d mac %pM map %x val %d "
+ "sent %u pri %u\n",
+ fcf->fabric_name, fcf->vfid, fcf->fcf_mac,
+ fcf->fc_map, fcoe_ctlr_mtu_valid(fcf),
+ fcf->flogi_sent, fcf->pri);
+ if (!fcoe_ctlr_fcf_usable(fcf)) {
+ LIBFCOE_FIP_DBG(fip, "FCF for fab %16.16llx "
+ "map %x %svalid %savailable\n",
+ fcf->fabric_name, fcf->fc_map,
+ (fcf->flags & FIP_FL_SOL) ? "" : "in",
+ (fcf->flags & FIP_FL_AVAIL) ?
+ "" : "un");
+ continue;
+ }
+ if (!best || fcf->pri < best->pri || best->flogi_sent)
+ best = fcf;
+ if (fcf->fabric_name != best->fabric_name ||
+ fcf->vfid != best->vfid ||
+ fcf->fc_map != best->fc_map) {
+ LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, "
+ "or FC-MAP\n");
+ return NULL;
+ }
+ }
+ fip->sel_fcf = best;
+ if (best) {
+ LIBFCOE_FIP_DBG(fip, "using FCF mac %pM\n", best->fcf_mac);
+ fip->port_ka_time = jiffies +
+ msecs_to_jiffies(FIP_VN_KA_PERIOD);
+ fip->ctlr_ka_time = jiffies + best->fka_period;
+ if (time_before(fip->ctlr_ka_time, fip->timer.expires))
+ mod_timer(&fip->timer, fip->ctlr_ka_time);
+ }
+ return best;
+}
+
+/**
+ * fcoe_ctlr_flogi_send_locked() - send FIP-encapsulated FLOGI to current FCF
+ * @fip: The FCoE controller
+ *
+ * Returns non-zero error if it could not be sent.
+ *
+ * Called with ctlr_mutex and ctlr_lock held.
+ * Caller must verify that fip->sel_fcf is not NULL.
+ */
+static int fcoe_ctlr_flogi_send_locked(struct fcoe_ctlr *fip)
+{
+ struct sk_buff *skb;
+ struct sk_buff *skb_orig;
+ struct fc_frame_header *fh;
+ int error;
+
+ skb_orig = fip->flogi_req;
+ if (!skb_orig)
+ return -EINVAL;
+
+ /*
+ * Clone and send the FLOGI request. If clone fails, use original.
+ */
+ skb = skb_clone(skb_orig, GFP_ATOMIC);
+ if (!skb) {
+ skb = skb_orig;
+ fip->flogi_req = NULL;
+ }
+ fh = (struct fc_frame_header *)skb->data;
+ error = fcoe_ctlr_encaps(fip, fip->lp, FIP_DT_FLOGI, skb,
+ ntoh24(fh->fh_d_id));
+ if (error) {
+ kfree_skb(skb);
+ return error;
+ }
+ fip->send(fip, skb);
+ fip->sel_fcf->flogi_sent = 1;
+ return 0;
+}
+
+/**
+ * fcoe_ctlr_flogi_retry() - resend FLOGI request to a new FCF if possible
+ * @fip: The FCoE controller
+ *
+ * Returns non-zero error code if there's no FLOGI request to retry or
+ * no alternate FCF available.
+ */
+static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *fip)
+{
+ struct fcoe_fcf *fcf;
+ int error;
+
+ mutex_lock(&fip->ctlr_mutex);
+ spin_lock_bh(&fip->ctlr_lock);
+ LIBFCOE_FIP_DBG(fip, "re-sending FLOGI - reselect\n");
+ fcf = fcoe_ctlr_select(fip);
+ if (!fcf || fcf->flogi_sent) {
+ kfree_skb(fip->flogi_req);
+ fip->flogi_req = NULL;
+ error = -ENOENT;
+ } else {
+ fcoe_ctlr_solicit(fip, NULL);
+ error = fcoe_ctlr_flogi_send_locked(fip);
+ }
+ spin_unlock_bh(&fip->ctlr_lock);
+ mutex_unlock(&fip->ctlr_mutex);
+ return error;
+}
+
+
+/**
+ * fcoe_ctlr_flogi_send() - Handle sending of FIP FLOGI.
+ * @fip: The FCoE controller that timed out
+ *
+ * Done here because fcoe_ctlr_els_send() can't get mutex.
+ *
+ * Called with ctlr_mutex held. The caller must not hold ctlr_lock.
+ */
+static void fcoe_ctlr_flogi_send(struct fcoe_ctlr *fip)
+{
+ struct fcoe_fcf *fcf;
+
+ spin_lock_bh(&fip->ctlr_lock);
+ fcf = fip->sel_fcf;
+ if (!fcf || !fip->flogi_req_send)
+ goto unlock;
+
+ LIBFCOE_FIP_DBG(fip, "sending FLOGI\n");
+
+ /*
+ * If this FLOGI is being sent due to a timeout retry
+ * to the same FCF as before, select a different FCF if possible.
+ */
+ if (fcf->flogi_sent) {
+ LIBFCOE_FIP_DBG(fip, "sending FLOGI - reselect\n");
+ fcf = fcoe_ctlr_select(fip);
+ if (!fcf || fcf->flogi_sent) {
+ LIBFCOE_FIP_DBG(fip, "sending FLOGI - clearing\n");
+ list_for_each_entry(fcf, &fip->fcfs, list)
+ fcf->flogi_sent = 0;
+ fcf = fcoe_ctlr_select(fip);
+ }
+ }
+ if (fcf) {
+ fcoe_ctlr_flogi_send_locked(fip);
+ fip->flogi_req_send = 0;
+ } else /* XXX */
+ LIBFCOE_FIP_DBG(fip, "No FCF selected - defer send\n");
+unlock:
+ spin_unlock_bh(&fip->ctlr_lock);
+}
+
+/**
+ * fcoe_ctlr_timeout() - FIP timeout handler
+ * @arg: The FCoE controller that timed out
+ */
+static void fcoe_ctlr_timeout(struct timer_list *t)
+{
+ struct fcoe_ctlr *fip = from_timer(fip, t, timer);
+
+ schedule_work(&fip->timer_work);
+}
+
+/**
+ * fcoe_ctlr_timer_work() - Worker thread function for timer work
+ * @work: Handle to a FCoE controller
+ *
+ * Ages FCFs. Triggers FCF selection if possible.
+ * Sends keep-alives and resets.
+ */
+static void fcoe_ctlr_timer_work(struct work_struct *work)
+{
+ struct fcoe_ctlr *fip;
+ struct fc_lport *vport;
+ u8 *mac;
+ u8 reset = 0;
+ u8 send_ctlr_ka = 0;
+ u8 send_port_ka = 0;
+ struct fcoe_fcf *sel;
+ struct fcoe_fcf *fcf;
+ unsigned long next_timer;
+
+ fip = container_of(work, struct fcoe_ctlr, timer_work);
+ if (fip->mode == FIP_MODE_VN2VN)
+ return fcoe_ctlr_vn_timeout(fip);
+ mutex_lock(&fip->ctlr_mutex);
+ if (fip->state == FIP_ST_DISABLED) {
+ mutex_unlock(&fip->ctlr_mutex);
+ return;
+ }
+
+ fcf = fip->sel_fcf;
+ next_timer = fcoe_ctlr_age_fcfs(fip);
+
+ sel = fip->sel_fcf;
+ if (!sel && fip->sel_time) {
+ if (time_after_eq(jiffies, fip->sel_time)) {
+ sel = fcoe_ctlr_select(fip);
+ fip->sel_time = 0;
+ } else if (time_after(next_timer, fip->sel_time))
+ next_timer = fip->sel_time;
+ }
+
+ if (sel && fip->flogi_req_send)
+ fcoe_ctlr_flogi_send(fip);
+ else if (!sel && fcf)
+ reset = 1;
+
+ if (sel && !sel->fd_flags) {
+ if (time_after_eq(jiffies, fip->ctlr_ka_time)) {
+ fip->ctlr_ka_time = jiffies + sel->fka_period;
+ send_ctlr_ka = 1;
+ }
+ if (time_after(next_timer, fip->ctlr_ka_time))
+ next_timer = fip->ctlr_ka_time;
+
+ if (time_after_eq(jiffies, fip->port_ka_time)) {
+ fip->port_ka_time = jiffies +
+ msecs_to_jiffies(FIP_VN_KA_PERIOD);
+ send_port_ka = 1;
+ }
+ if (time_after(next_timer, fip->port_ka_time))
+ next_timer = fip->port_ka_time;
+ }
+ if (!list_empty(&fip->fcfs))
+ mod_timer(&fip->timer, next_timer);
+ mutex_unlock(&fip->ctlr_mutex);
+
+ if (reset) {
+ fc_lport_reset(fip->lp);
+ /* restart things with a solicitation */
+ fcoe_ctlr_solicit(fip, NULL);
+ }
+
+ if (send_ctlr_ka)
+ fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr);
+
+ if (send_port_ka) {
+ mutex_lock(&fip->lp->lp_mutex);
+ mac = fip->get_src_addr(fip->lp);
+ fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac);
+ list_for_each_entry(vport, &fip->lp->vports, list) {
+ mac = fip->get_src_addr(vport);
+ fcoe_ctlr_send_keep_alive(fip, vport, 1, mac);
+ }
+ mutex_unlock(&fip->lp->lp_mutex);
+ }
+}
+
+/**
+ * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames
+ * @recv_work: Handle to a FCoE controller
+ */
+static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
+{
+ struct fcoe_ctlr *fip;
+ struct sk_buff *skb;
+
+ fip = container_of(recv_work, struct fcoe_ctlr, recv_work);
+ while ((skb = skb_dequeue(&fip->fip_recv_list)))
+ fcoe_ctlr_recv_handler(fip, skb);
+}
+
+/**
+ * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response
+ * @fip: The FCoE controller
+ * @fp: The FC frame to snoop
+ *
+ * Snoop potential response to FLOGI or even incoming FLOGI.
+ *
+ * The caller has checked that we are waiting for login as indicated
+ * by fip->flogi_oxid != FC_XID_UNKNOWN.
+ *
+ * The caller is responsible for freeing the frame.
+ * Fill in the granted_mac address.
+ *
+ * Return non-zero if the frame should not be delivered to libfc.
+ */
+int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport,
+ struct fc_frame *fp)
+{
+ struct fc_frame_header *fh;
+ u8 op;
+ u8 *sa;
+
+ sa = eth_hdr(&fp->skb)->h_source;
+ fh = fc_frame_header_get(fp);
+ if (fh->fh_type != FC_TYPE_ELS)
+ return 0;
+
+ op = fc_frame_payload_op(fp);
+ if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP &&
+ fip->flogi_oxid == ntohs(fh->fh_ox_id)) {
+
+ mutex_lock(&fip->ctlr_mutex);
+ if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) {
+ mutex_unlock(&fip->ctlr_mutex);
+ return -EINVAL;
+ }
+ fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
+ LIBFCOE_FIP_DBG(fip,
+ "received FLOGI LS_ACC using non-FIP mode\n");
+
+ /*
+ * FLOGI accepted.
+ * If the src mac addr is FC_OUI-based, then we mark the
+ * address_mode flag to use FC_OUI-based Ethernet DA.
+ * Otherwise we use the FCoE gateway addr
+ */
+ if (ether_addr_equal(sa, (u8[6])FC_FCOE_FLOGI_MAC)) {
+ fcoe_ctlr_map_dest(fip);
+ } else {
+ memcpy(fip->dest_addr, sa, ETH_ALEN);
+ fip->map_dest = 0;
+ }
+ fip->flogi_oxid = FC_XID_UNKNOWN;
+ mutex_unlock(&fip->ctlr_mutex);
+ fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id);
+ } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) {
+ /*
+ * Save source MAC for point-to-point responses.
+ */
+ mutex_lock(&fip->ctlr_mutex);
+ if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) {
+ memcpy(fip->dest_addr, sa, ETH_ALEN);
+ fip->map_dest = 0;
+ if (fip->state == FIP_ST_AUTO)
+ LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. "
+ "Setting non-FIP mode\n");
+ fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
+ }
+ mutex_unlock(&fip->ctlr_mutex);
+ }
+ return 0;
+}
+EXPORT_SYMBOL(fcoe_ctlr_recv_flogi);
+
+/**
+ * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN
+ * @mac: The MAC address to convert
+ * @scheme: The scheme to use when converting
+ * @port: The port indicator for converting
+ *
+ * Returns: u64 fc world wide name
+ */
+u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
+ unsigned int scheme, unsigned int port)
+{
+ u64 wwn;
+ u64 host_mac;
+
+ /* The MAC is in NO, so flip only the low 48 bits */
+ host_mac = ((u64) mac[0] << 40) |
+ ((u64) mac[1] << 32) |
+ ((u64) mac[2] << 24) |
+ ((u64) mac[3] << 16) |
+ ((u64) mac[4] << 8) |
+ (u64) mac[5];
+
+ WARN_ON(host_mac >= (1ULL << 48));
+ wwn = host_mac | ((u64) scheme << 60);
+ switch (scheme) {
+ case 1:
+ WARN_ON(port != 0);
+ break;
+ case 2:
+ WARN_ON(port >= 0xfff);
+ wwn |= (u64) port << 48;
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
+
+ return wwn;
+}
+EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac);
+
+/**
+ * fcoe_ctlr_rport() - return the fcoe_rport for a given fc_rport_priv
+ * @rdata: libfc remote port
+ */
+static inline struct fcoe_rport *fcoe_ctlr_rport(struct fc_rport_priv *rdata)
+{
+ return (struct fcoe_rport *)(rdata + 1);
+}
+
+/**
+ * fcoe_ctlr_vn_send() - Send a FIP VN2VN Probe Request or Reply.
+ * @fip: The FCoE controller
+ * @sub: sub-opcode for probe request, reply, or advertisement.
+ * @dest: The destination Ethernet MAC address
+ * @min_len: minimum size of the Ethernet payload to be sent
+ */
+static void fcoe_ctlr_vn_send(struct fcoe_ctlr *fip,
+ enum fip_vn2vn_subcode sub,
+ const u8 *dest, size_t min_len)
+{
+ struct sk_buff *skb;
+ struct fip_vn2vn_probe_frame {
+ struct ethhdr eth;
+ struct fip_header fip;
+ struct fip_mac_desc mac;
+ struct fip_wwn_desc wwnn;
+ struct fip_vn_desc vn;
+ } __packed * frame;
+ struct fip_fc4_feat *ff;
+ struct fip_size_desc *size;
+ u32 fcp_feat;
+ size_t len;
+ size_t dlen;
+
+ len = sizeof(*frame);
+ dlen = 0;
+ if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
+ dlen = sizeof(struct fip_fc4_feat) +
+ sizeof(struct fip_size_desc);
+ len += dlen;
+ }
+ dlen += sizeof(frame->mac) + sizeof(frame->wwnn) + sizeof(frame->vn);
+ len = max(len, min_len + sizeof(struct ethhdr));
+
+ skb = dev_alloc_skb(len);
+ if (!skb)
+ return;
+
+ frame = (struct fip_vn2vn_probe_frame *)skb->data;
+ memset(frame, 0, len);
+ memcpy(frame->eth.h_dest, dest, ETH_ALEN);
+
+ if (sub == FIP_SC_VN_BEACON) {
+ hton24(frame->eth.h_source, FIP_VN_FC_MAP);
+ hton24(frame->eth.h_source + 3, fip->port_id);
+ } else {
+ memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
+ }
+ frame->eth.h_proto = htons(ETH_P_FIP);
+
+ frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
+ frame->fip.fip_op = htons(FIP_OP_VN2VN);
+ frame->fip.fip_subcode = sub;
+ frame->fip.fip_dl_len = htons(dlen / FIP_BPW);
+
+ frame->mac.fd_desc.fip_dtype = FIP_DT_MAC;
+ frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW;
+ memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
+
+ frame->wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
+ frame->wwnn.fd_desc.fip_dlen = sizeof(frame->wwnn) / FIP_BPW;
+ put_unaligned_be64(fip->lp->wwnn, &frame->wwnn.fd_wwn);
+
+ frame->vn.fd_desc.fip_dtype = FIP_DT_VN_ID;
+ frame->vn.fd_desc.fip_dlen = sizeof(frame->vn) / FIP_BPW;
+ hton24(frame->vn.fd_mac, FIP_VN_FC_MAP);
+ hton24(frame->vn.fd_mac + 3, fip->port_id);
+ hton24(frame->vn.fd_fc_id, fip->port_id);
+ put_unaligned_be64(fip->lp->wwpn, &frame->vn.fd_wwpn);
+
+ /*
+ * For claims, add FC-4 features.
+ * TBD: Add interface to get fc-4 types and features from libfc.
+ */
+ if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
+ ff = (struct fip_fc4_feat *)(frame + 1);
+ ff->fd_desc.fip_dtype = FIP_DT_FC4F;
+ ff->fd_desc.fip_dlen = sizeof(*ff) / FIP_BPW;
+ ff->fd_fts = fip->lp->fcts;
+
+ fcp_feat = 0;
+ if (fip->lp->service_params & FCP_SPPF_INIT_FCN)
+ fcp_feat |= FCP_FEAT_INIT;
+ if (fip->lp->service_params & FCP_SPPF_TARG_FCN)
+ fcp_feat |= FCP_FEAT_TARG;
+ fcp_feat <<= (FC_TYPE_FCP * 4) % 32;
+ ff->fd_ff.fd_feat[FC_TYPE_FCP * 4 / 32] = htonl(fcp_feat);
+
+ size = (struct fip_size_desc *)(ff + 1);
+ size->fd_desc.fip_dtype = FIP_DT_FCOE_SIZE;
+ size->fd_desc.fip_dlen = sizeof(*size) / FIP_BPW;
+ size->fd_size = htons(fcoe_ctlr_fcoe_size(fip));
+ }
+
+ skb_put(skb, len);
+ skb->protocol = htons(ETH_P_FIP);
+ skb->priority = fip->priority;
+ skb_reset_mac_header(skb);
+ skb_reset_network_header(skb);
+
+ fip->send(fip, skb);
+}
+
+/**
+ * fcoe_ctlr_vn_rport_callback - Event handler for rport events.
+ * @lport: The lport which is receiving the event
+ * @rdata: remote port private data
+ * @event: The event that occurred
+ *
+ * Locking Note: The rport lock must not be held when calling this function.
+ */
+static void fcoe_ctlr_vn_rport_callback(struct fc_lport *lport,
+ struct fc_rport_priv *rdata,
+ enum fc_rport_event event)
+{
+ struct fcoe_ctlr *fip = lport->disc.priv;
+ struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
+
+ LIBFCOE_FIP_DBG(fip, "vn_rport_callback %x event %d\n",
+ rdata->ids.port_id, event);
+
+ mutex_lock(&fip->ctlr_mutex);
+ switch (event) {
+ case RPORT_EV_READY:
+ frport->login_count = 0;
+ break;
+ case RPORT_EV_LOGO:
+ case RPORT_EV_FAILED:
+ case RPORT_EV_STOP:
+ frport->login_count++;
+ if (frport->login_count > FCOE_CTLR_VN2VN_LOGIN_LIMIT) {
+ LIBFCOE_FIP_DBG(fip,
+ "rport FLOGI limited port_id %6.6x\n",
+ rdata->ids.port_id);
+ fc_rport_logoff(rdata);
+ }
+ break;
+ default:
+ break;
+ }
+ mutex_unlock(&fip->ctlr_mutex);
+}
+
+static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = {
+ .event_callback = fcoe_ctlr_vn_rport_callback,
+};
+
+/**
+ * fcoe_ctlr_disc_stop_locked() - stop discovery in VN2VN mode
+ * @fip: The FCoE controller
+ *
+ * Called with ctlr_mutex held.
+ */
+static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport)
+{
+ struct fc_rport_priv *rdata;
+
+ mutex_lock(&lport->disc.disc_mutex);
+ list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) {
+ if (kref_get_unless_zero(&rdata->kref)) {
+ fc_rport_logoff(rdata);
+ kref_put(&rdata->kref, fc_rport_destroy);
+ }
+ }
+ lport->disc.disc_callback = NULL;
+ mutex_unlock(&lport->disc.disc_mutex);
+}
+
+/**
+ * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode
+ * @fip: The FCoE controller
+ *
+ * Called through the local port template for discovery.
+ * Called without the ctlr_mutex held.
+ */
+static void fcoe_ctlr_disc_stop(struct fc_lport *lport)
+{
+ struct fcoe_ctlr *fip = lport->disc.priv;
+
+ mutex_lock(&fip->ctlr_mutex);
+ fcoe_ctlr_disc_stop_locked(lport);
+ mutex_unlock(&fip->ctlr_mutex);
+}
+
+/**
+ * fcoe_ctlr_disc_stop_final() - stop discovery for shutdown in VN2VN mode
+ * @fip: The FCoE controller
+ *
+ * Called through the local port template for discovery.
+ * Called without the ctlr_mutex held.
+ */
+static void fcoe_ctlr_disc_stop_final(struct fc_lport *lport)
+{
+ fcoe_ctlr_disc_stop(lport);
+ fc_rport_flush_queue();
+ synchronize_rcu();
+}
+
+/**
+ * fcoe_ctlr_vn_restart() - VN2VN probe restart with new port_id
+ * @fip: The FCoE controller
+ *
+ * Called with fcoe_ctlr lock held.
+ */
+static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip)
+{
+ unsigned long wait;
+ u32 port_id;
+
+ fcoe_ctlr_disc_stop_locked(fip->lp);
+
+ /*
+ * Get proposed port ID.
+ * If this is the first try after link up, use any previous port_id.
+ * If there was none, use the low bits of the port_name.
+ * On subsequent tries, get the next random one.
+ * Don't use reserved IDs, use another non-zero value, just as random.
+ */
+ port_id = fip->port_id;
+ if (fip->probe_tries)
+ port_id = prandom_u32_state(&fip->rnd_state) & 0xffff;
+ else if (!port_id)
+ port_id = fip->lp->wwpn & 0xffff;
+ if (!port_id || port_id == 0xffff)
+ port_id = 1;
+ fip->port_id = port_id;
+
+ if (fip->probe_tries < FIP_VN_RLIM_COUNT) {
+ fip->probe_tries++;
+ wait = prandom_u32() % FIP_VN_PROBE_WAIT;
+ } else
+ wait = FIP_VN_RLIM_INT;
+ mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait));
+ fcoe_ctlr_set_state(fip, FIP_ST_VNMP_START);
+}
+
+/**
+ * fcoe_ctlr_vn_start() - Start in VN2VN mode
+ * @fip: The FCoE controller
+ *
+ * Called with fcoe_ctlr lock held.
+ */
+static void fcoe_ctlr_vn_start(struct fcoe_ctlr *fip)
+{
+ fip->probe_tries = 0;
+ prandom_seed_state(&fip->rnd_state, fip->lp->wwpn);
+ fcoe_ctlr_vn_restart(fip);
+}
+
+/**
+ * fcoe_ctlr_vn_parse - parse probe request or response
+ * @fip: The FCoE controller
+ * @skb: incoming packet
+ * @rdata: buffer for resulting parsed VN entry plus fcoe_rport
+ *
+ * Returns non-zero error number on error.
+ * Does not consume the packet.
+ */
+static int fcoe_ctlr_vn_parse(struct fcoe_ctlr *fip,
+ struct sk_buff *skb,
+ struct fc_rport_priv *rdata)
+{
+ struct fip_header *fiph;
+ struct fip_desc *desc = NULL;
+ struct fip_mac_desc *macd = NULL;
+ struct fip_wwn_desc *wwn = NULL;
+ struct fip_vn_desc *vn = NULL;
+ struct fip_size_desc *size = NULL;
+ struct fcoe_rport *frport;
+ size_t rlen;
+ size_t dlen;
+ u32 desc_mask = 0;
+ u32 dtype;
+ u8 sub;
+
+ memset(rdata, 0, sizeof(*rdata) + sizeof(*frport));
+ frport = fcoe_ctlr_rport(rdata);
+
+ fiph = (struct fip_header *)skb->data;
+ frport->flags = ntohs(fiph->fip_flags);
+
+ sub = fiph->fip_subcode;
+ switch (sub) {
+ case FIP_SC_VN_PROBE_REQ:
+ case FIP_SC_VN_PROBE_REP:
+ case FIP_SC_VN_BEACON:
+ desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
+ BIT(FIP_DT_VN_ID);
+ break;
+ case FIP_SC_VN_CLAIM_NOTIFY:
+ case FIP_SC_VN_CLAIM_REP:
+ desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
+ BIT(FIP_DT_VN_ID) | BIT(FIP_DT_FC4F) |
+ BIT(FIP_DT_FCOE_SIZE);
+ break;
+ default:
+ LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub);
+ return -EINVAL;
+ }
+
+ rlen = ntohs(fiph->fip_dl_len) * 4;
+ if (rlen + sizeof(*fiph) > skb->len)
+ return -EINVAL;
+
+ desc = (struct fip_desc *)(fiph + 1);
+ while (rlen > 0) {
+ dlen = desc->fip_dlen * FIP_BPW;
+ if (dlen < sizeof(*desc) || dlen > rlen)
+ return -EINVAL;
+
+ dtype = desc->fip_dtype;
+ if (dtype < 32) {
+ if (!(desc_mask & BIT(dtype))) {
+ LIBFCOE_FIP_DBG(fip,
+ "unexpected or duplicated desc "
+ "desc type %u in "
+ "FIP VN2VN subtype %u\n",
+ dtype, sub);
+ return -EINVAL;
+ }
+ desc_mask &= ~BIT(dtype);
+ }
+
+ switch (dtype) {
+ case FIP_DT_MAC:
+ if (dlen != sizeof(struct fip_mac_desc))
+ goto len_err;
+ macd = (struct fip_mac_desc *)desc;
+ if (!is_valid_ether_addr(macd->fd_mac)) {
+ LIBFCOE_FIP_DBG(fip,
+ "Invalid MAC addr %pM in FIP VN2VN\n",
+ macd->fd_mac);
+ return -EINVAL;
+ }
+ memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN);
+ break;
+ case FIP_DT_NAME:
+ if (dlen != sizeof(struct fip_wwn_desc))
+ goto len_err;
+ wwn = (struct fip_wwn_desc *)desc;
+ rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn);
+ break;
+ case FIP_DT_VN_ID:
+ if (dlen != sizeof(struct fip_vn_desc))
+ goto len_err;
+ vn = (struct fip_vn_desc *)desc;
+ memcpy(frport->vn_mac, vn->fd_mac, ETH_ALEN);
+ rdata->ids.port_id = ntoh24(vn->fd_fc_id);
+ rdata->ids.port_name = get_unaligned_be64(&vn->fd_wwpn);
+ break;
+ case FIP_DT_FC4F:
+ if (dlen != sizeof(struct fip_fc4_feat))
+ goto len_err;
+ break;
+ case FIP_DT_FCOE_SIZE:
+ if (dlen != sizeof(struct fip_size_desc))
+ goto len_err;
+ size = (struct fip_size_desc *)desc;
+ frport->fcoe_len = ntohs(size->fd_size);
+ break;
+ default:
+ LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
+ "in FIP probe\n", dtype);
+ /* standard says ignore unknown descriptors >= 128 */
+ if (dtype < FIP_DT_NON_CRITICAL)
+ return -EINVAL;
+ break;
+ }
+ desc = (struct fip_desc *)((char *)desc + dlen);
+ rlen -= dlen;
+ }
+ return 0;
+
+len_err:
+ LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
+ dtype, dlen);
+ return -EINVAL;
+}
+
+/**
+ * fcoe_ctlr_vn_send_claim() - send multicast FIP VN2VN Claim Notification.
+ * @fip: The FCoE controller
+ *
+ * Called with ctlr_mutex held.
+ */
+static void fcoe_ctlr_vn_send_claim(struct fcoe_ctlr *fip)
+{
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_NOTIFY, fcoe_all_vn2vn, 0);
+ fip->sol_time = jiffies;
+}
+
+/**
+ * fcoe_ctlr_vn_probe_req() - handle incoming VN2VN probe request.
+ * @fip: The FCoE controller
+ * @rdata: parsed remote port with frport from the probe request
+ *
+ * Called with ctlr_mutex held.
+ */
+static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip,
+ struct fc_rport_priv *rdata)
+{
+ struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
+
+ if (rdata->ids.port_id != fip->port_id)
+ return;
+
+ switch (fip->state) {
+ case FIP_ST_VNMP_CLAIM:
+ case FIP_ST_VNMP_UP:
+ LIBFCOE_FIP_DBG(fip, "vn_probe_req: send reply, state %x\n",
+ fip->state);
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
+ frport->enode_mac, 0);
+ break;
+ case FIP_ST_VNMP_PROBE1:
+ case FIP_ST_VNMP_PROBE2:
+ /*
+ * Decide whether to reply to the Probe.
+ * Our selected address is never a "recorded" one, so
+ * only reply if our WWPN is greater and the
+ * Probe's REC bit is not set.
+ * If we don't reply, we will change our address.
+ */
+ if (fip->lp->wwpn > rdata->ids.port_name &&
+ !(frport->flags & FIP_FL_REC_OR_P2P)) {
+ LIBFCOE_FIP_DBG(fip, "vn_probe_req: "
+ "port_id collision\n");
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
+ frport->enode_mac, 0);
+ break;
+ }
+ /* fall through */
+ case FIP_ST_VNMP_START:
+ LIBFCOE_FIP_DBG(fip, "vn_probe_req: "
+ "restart VN2VN negotiation\n");
+ fcoe_ctlr_vn_restart(fip);
+ break;
+ default:
+ LIBFCOE_FIP_DBG(fip, "vn_probe_req: ignore state %x\n",
+ fip->state);
+ break;
+ }
+}
+
+/**
+ * fcoe_ctlr_vn_probe_reply() - handle incoming VN2VN probe reply.
+ * @fip: The FCoE controller
+ * @rdata: parsed remote port with frport from the probe request
+ *
+ * Called with ctlr_mutex held.
+ */
+static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip,
+ struct fc_rport_priv *rdata)
+{
+ if (rdata->ids.port_id != fip->port_id)
+ return;
+ switch (fip->state) {
+ case FIP_ST_VNMP_START:
+ case FIP_ST_VNMP_PROBE1:
+ case FIP_ST_VNMP_PROBE2:
+ case FIP_ST_VNMP_CLAIM:
+ LIBFCOE_FIP_DBG(fip, "vn_probe_reply: restart state %x\n",
+ fip->state);
+ fcoe_ctlr_vn_restart(fip);
+ break;
+ case FIP_ST_VNMP_UP:
+ LIBFCOE_FIP_DBG(fip, "vn_probe_reply: send claim notify\n");
+ fcoe_ctlr_vn_send_claim(fip);
+ break;
+ default:
+ break;
+ }
+}
+
+/**
+ * fcoe_ctlr_vn_add() - Add a VN2VN entry to the list, based on a claim reply.
+ * @fip: The FCoE controller
+ * @new: newly-parsed remote port with frport as a template for new rdata
+ *
+ * Called with ctlr_mutex held.
+ */
+static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fc_rport_priv *new)
+{
+ struct fc_lport *lport = fip->lp;
+ struct fc_rport_priv *rdata;
+ struct fc_rport_identifiers *ids;
+ struct fcoe_rport *frport;
+ u32 port_id;
+
+ port_id = new->ids.port_id;
+ if (port_id == fip->port_id)
+ return;
+
+ mutex_lock(&lport->disc.disc_mutex);
+ rdata = fc_rport_create(lport, port_id);
+ if (!rdata) {
+ mutex_unlock(&lport->disc.disc_mutex);
+ return;
+ }
+ mutex_lock(&rdata->rp_mutex);
+ mutex_unlock(&lport->disc.disc_mutex);
+
+ rdata->ops = &fcoe_ctlr_vn_rport_ops;
+ rdata->disc_id = lport->disc.disc_id;
+
+ ids = &rdata->ids;
+ if ((ids->port_name != -1 && ids->port_name != new->ids.port_name) ||
+ (ids->node_name != -1 && ids->node_name != new->ids.node_name)) {
+ mutex_unlock(&rdata->rp_mutex);
+ LIBFCOE_FIP_DBG(fip, "vn_add rport logoff %6.6x\n", port_id);
+ fc_rport_logoff(rdata);
+ mutex_lock(&rdata->rp_mutex);
+ }
+ ids->port_name = new->ids.port_name;
+ ids->node_name = new->ids.node_name;
+ mutex_unlock(&rdata->rp_mutex);
+
+ frport = fcoe_ctlr_rport(rdata);
+ LIBFCOE_FIP_DBG(fip, "vn_add rport %6.6x %s state %d\n",
+ port_id, frport->fcoe_len ? "old" : "new",
+ rdata->rp_state);
+ *frport = *fcoe_ctlr_rport(new);
+ frport->time = 0;
+}
+
+/**
+ * fcoe_ctlr_vn_lookup() - Find VN remote port's MAC address
+ * @fip: The FCoE controller
+ * @port_id: The port_id of the remote VN_node
+ * @mac: buffer which will hold the VN_NODE destination MAC address, if found.
+ *
+ * Returns non-zero error if no remote port found.
+ */
+static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *fip, u32 port_id, u8 *mac)
+{
+ struct fc_lport *lport = fip->lp;
+ struct fc_rport_priv *rdata;
+ struct fcoe_rport *frport;
+ int ret = -1;
+
+ rdata = fc_rport_lookup(lport, port_id);
+ if (rdata) {
+ frport = fcoe_ctlr_rport(rdata);
+ memcpy(mac, frport->enode_mac, ETH_ALEN);
+ ret = 0;
+ kref_put(&rdata->kref, fc_rport_destroy);
+ }
+ return ret;
+}
+
+/**
+ * fcoe_ctlr_vn_claim_notify() - handle received FIP VN2VN Claim Notification
+ * @fip: The FCoE controller
+ * @new: newly-parsed remote port with frport as a template for new rdata
+ *
+ * Called with ctlr_mutex held.
+ */
+static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip,
+ struct fc_rport_priv *new)
+{
+ struct fcoe_rport *frport = fcoe_ctlr_rport(new);
+
+ if (frport->flags & FIP_FL_REC_OR_P2P) {
+ LIBFCOE_FIP_DBG(fip, "send probe req for P2P/REC\n");
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
+ return;
+ }
+ switch (fip->state) {
+ case FIP_ST_VNMP_START:
+ case FIP_ST_VNMP_PROBE1:
+ case FIP_ST_VNMP_PROBE2:
+ if (new->ids.port_id == fip->port_id) {
+ LIBFCOE_FIP_DBG(fip, "vn_claim_notify: "
+ "restart, state %d\n",
+ fip->state);
+ fcoe_ctlr_vn_restart(fip);
+ }
+ break;
+ case FIP_ST_VNMP_CLAIM:
+ case FIP_ST_VNMP_UP:
+ if (new->ids.port_id == fip->port_id) {
+ if (new->ids.port_name > fip->lp->wwpn) {
+ LIBFCOE_FIP_DBG(fip, "vn_claim_notify: "
+ "restart, port_id collision\n");
+ fcoe_ctlr_vn_restart(fip);
+ break;
+ }
+ LIBFCOE_FIP_DBG(fip, "vn_claim_notify: "
+ "send claim notify\n");
+ fcoe_ctlr_vn_send_claim(fip);
+ break;
+ }
+ LIBFCOE_FIP_DBG(fip, "vn_claim_notify: send reply to %x\n",
+ new->ids.port_id);
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_REP, frport->enode_mac,
+ min((u32)frport->fcoe_len,
+ fcoe_ctlr_fcoe_size(fip)));
+ fcoe_ctlr_vn_add(fip, new);
+ break;
+ default:
+ LIBFCOE_FIP_DBG(fip, "vn_claim_notify: "
+ "ignoring claim from %x\n", new->ids.port_id);
+ break;
+ }
+}
+
+/**
+ * fcoe_ctlr_vn_claim_resp() - handle received Claim Response
+ * @fip: The FCoE controller that received the frame
+ * @new: newly-parsed remote port with frport from the Claim Response
+ *
+ * Called with ctlr_mutex held.
+ */
+static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip,
+ struct fc_rport_priv *new)
+{
+ LIBFCOE_FIP_DBG(fip, "claim resp from from rport %x - state %s\n",
+ new->ids.port_id, fcoe_ctlr_state(fip->state));
+ if (fip->state == FIP_ST_VNMP_UP || fip->state == FIP_ST_VNMP_CLAIM)
+ fcoe_ctlr_vn_add(fip, new);
+}
+
+/**
+ * fcoe_ctlr_vn_beacon() - handle received beacon.
+ * @fip: The FCoE controller that received the frame
+ * @new: newly-parsed remote port with frport from the Beacon
+ *
+ * Called with ctlr_mutex held.
+ */
+static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip,
+ struct fc_rport_priv *new)
+{
+ struct fc_lport *lport = fip->lp;
+ struct fc_rport_priv *rdata;
+ struct fcoe_rport *frport;
+
+ frport = fcoe_ctlr_rport(new);
+ if (frport->flags & FIP_FL_REC_OR_P2P) {
+ LIBFCOE_FIP_DBG(fip, "p2p beacon while in vn2vn mode\n");
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
+ return;
+ }
+ rdata = fc_rport_lookup(lport, new->ids.port_id);
+ if (rdata) {
+ if (rdata->ids.node_name == new->ids.node_name &&
+ rdata->ids.port_name == new->ids.port_name) {
+ frport = fcoe_ctlr_rport(rdata);
+ LIBFCOE_FIP_DBG(fip, "beacon from rport %x\n",
+ rdata->ids.port_id);
+ if (!frport->time && fip->state == FIP_ST_VNMP_UP) {
+ LIBFCOE_FIP_DBG(fip, "beacon expired "
+ "for rport %x\n",
+ rdata->ids.port_id);
+ fc_rport_login(rdata);
+ }
+ frport->time = jiffies;
+ }
+ kref_put(&rdata->kref, fc_rport_destroy);
+ return;
+ }
+ if (fip->state != FIP_ST_VNMP_UP)
+ return;
+
+ /*
+ * Beacon from a new neighbor.
+ * Send a claim notify if one hasn't been sent recently.
+ * Don't add the neighbor yet.
+ */
+ LIBFCOE_FIP_DBG(fip, "beacon from new rport %x. sending claim notify\n",
+ new->ids.port_id);
+ if (time_after(jiffies,
+ fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT)))
+ fcoe_ctlr_vn_send_claim(fip);
+}
+
+/**
+ * fcoe_ctlr_vn_age() - Check for VN_ports without recent beacons
+ * @fip: The FCoE controller
+ *
+ * Called with ctlr_mutex held.
+ * Called only in state FIP_ST_VNMP_UP.
+ * Returns the soonest time for next age-out or a time far in the future.
+ */
+static unsigned long fcoe_ctlr_vn_age(struct fcoe_ctlr *fip)
+{
+ struct fc_lport *lport = fip->lp;
+ struct fc_rport_priv *rdata;
+ struct fcoe_rport *frport;
+ unsigned long next_time;
+ unsigned long deadline;
+
+ next_time = jiffies + msecs_to_jiffies(FIP_VN_BEACON_INT * 10);
+ mutex_lock(&lport->disc.disc_mutex);
+ list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) {
+ if (!kref_get_unless_zero(&rdata->kref))
+ continue;
+ frport = fcoe_ctlr_rport(rdata);
+ if (!frport->time) {
+ kref_put(&rdata->kref, fc_rport_destroy);
+ continue;
+ }
+ deadline = frport->time +
+ msecs_to_jiffies(FIP_VN_BEACON_INT * 25 / 10);
+ if (time_after_eq(jiffies, deadline)) {
+ frport->time = 0;
+ LIBFCOE_FIP_DBG(fip,
+ "port %16.16llx fc_id %6.6x beacon expired\n",
+ rdata->ids.port_name, rdata->ids.port_id);
+ fc_rport_logoff(rdata);
+ } else if (time_before(deadline, next_time))
+ next_time = deadline;
+ kref_put(&rdata->kref, fc_rport_destroy);
+ }
+ mutex_unlock(&lport->disc.disc_mutex);
+ return next_time;
+}
+
+/**
+ * fcoe_ctlr_vn_recv() - Receive a FIP frame
+ * @fip: The FCoE controller that received the frame
+ * @skb: The received FIP frame
+ *
+ * Returns non-zero if the frame is dropped.
+ * Always consumes the frame.
+ */
+static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
+{
+ struct fip_header *fiph;
+ enum fip_vn2vn_subcode sub;
+ struct {
+ struct fc_rport_priv rdata;
+ struct fcoe_rport frport;
+ } buf;
+ int rc, vlan_id = 0;
+
+ fiph = (struct fip_header *)skb->data;
+ sub = fiph->fip_subcode;
+
+ if (fip->lp->vlan)
+ vlan_id = skb_vlan_tag_get_id(skb);
+
+ if (vlan_id && vlan_id != fip->lp->vlan) {
+ LIBFCOE_FIP_DBG(fip, "vn_recv drop frame sub %x vlan %d\n",
+ sub, vlan_id);
+ rc = -EAGAIN;
+ goto drop;
+ }
+
+ rc = fcoe_ctlr_vn_parse(fip, skb, &buf.rdata);
+ if (rc) {
+ LIBFCOE_FIP_DBG(fip, "vn_recv vn_parse error %d\n", rc);
+ goto drop;
+ }
+
+ mutex_lock(&fip->ctlr_mutex);
+ switch (sub) {
+ case FIP_SC_VN_PROBE_REQ:
+ fcoe_ctlr_vn_probe_req(fip, &buf.rdata);
+ break;
+ case FIP_SC_VN_PROBE_REP:
+ fcoe_ctlr_vn_probe_reply(fip, &buf.rdata);
+ break;
+ case FIP_SC_VN_CLAIM_NOTIFY:
+ fcoe_ctlr_vn_claim_notify(fip, &buf.rdata);
+ break;
+ case FIP_SC_VN_CLAIM_REP:
+ fcoe_ctlr_vn_claim_resp(fip, &buf.rdata);
+ break;
+ case FIP_SC_VN_BEACON:
+ fcoe_ctlr_vn_beacon(fip, &buf.rdata);
+ break;
+ default:
+ LIBFCOE_FIP_DBG(fip, "vn_recv unknown subcode %d\n", sub);
+ rc = -1;
+ break;
+ }
+ mutex_unlock(&fip->ctlr_mutex);
+drop:
+ kfree_skb(skb);
+ return rc;
+}
+
+/**
+ * fcoe_ctlr_vlan_parse - parse vlan discovery request or response
+ * @fip: The FCoE controller
+ * @skb: incoming packet
+ * @rdata: buffer for resulting parsed VLAN entry plus fcoe_rport
+ *
+ * Returns non-zero error number on error.
+ * Does not consume the packet.
+ */
+static int fcoe_ctlr_vlan_parse(struct fcoe_ctlr *fip,
+ struct sk_buff *skb,
+ struct fc_rport_priv *rdata)
+{
+ struct fip_header *fiph;
+ struct fip_desc *desc = NULL;
+ struct fip_mac_desc *macd = NULL;
+ struct fip_wwn_desc *wwn = NULL;
+ struct fcoe_rport *frport;
+ size_t rlen;
+ size_t dlen;
+ u32 desc_mask = 0;
+ u32 dtype;
+ u8 sub;
+
+ memset(rdata, 0, sizeof(*rdata) + sizeof(*frport));
+ frport = fcoe_ctlr_rport(rdata);
+
+ fiph = (struct fip_header *)skb->data;
+ frport->flags = ntohs(fiph->fip_flags);
+
+ sub = fiph->fip_subcode;
+ switch (sub) {
+ case FIP_SC_VL_REQ:
+ desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME);
+ break;
+ default:
+ LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub);
+ return -EINVAL;
+ }
+
+ rlen = ntohs(fiph->fip_dl_len) * 4;
+ if (rlen + sizeof(*fiph) > skb->len)
+ return -EINVAL;
+
+ desc = (struct fip_desc *)(fiph + 1);
+ while (rlen > 0) {
+ dlen = desc->fip_dlen * FIP_BPW;
+ if (dlen < sizeof(*desc) || dlen > rlen)
+ return -EINVAL;
+
+ dtype = desc->fip_dtype;
+ if (dtype < 32) {
+ if (!(desc_mask & BIT(dtype))) {
+ LIBFCOE_FIP_DBG(fip,
+ "unexpected or duplicated desc "
+ "desc type %u in "
+ "FIP VN2VN subtype %u\n",
+ dtype, sub);
+ return -EINVAL;
+ }
+ desc_mask &= ~BIT(dtype);
+ }
+
+ switch (dtype) {
+ case FIP_DT_MAC:
+ if (dlen != sizeof(struct fip_mac_desc))
+ goto len_err;
+ macd = (struct fip_mac_desc *)desc;
+ if (!is_valid_ether_addr(macd->fd_mac)) {
+ LIBFCOE_FIP_DBG(fip,
+ "Invalid MAC addr %pM in FIP VN2VN\n",
+ macd->fd_mac);
+ return -EINVAL;
+ }
+ memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN);
+ break;
+ case FIP_DT_NAME:
+ if (dlen != sizeof(struct fip_wwn_desc))
+ goto len_err;
+ wwn = (struct fip_wwn_desc *)desc;
+ rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn);
+ break;
+ default:
+ LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
+ "in FIP probe\n", dtype);
+ /* standard says ignore unknown descriptors >= 128 */
+ if (dtype < FIP_DT_NON_CRITICAL)
+ return -EINVAL;
+ break;
+ }
+ desc = (struct fip_desc *)((char *)desc + dlen);
+ rlen -= dlen;
+ }
+ return 0;
+
+len_err:
+ LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
+ dtype, dlen);
+ return -EINVAL;
+}
+
+/**
+ * fcoe_ctlr_vlan_send() - Send a FIP VLAN Notification
+ * @fip: The FCoE controller
+ * @sub: sub-opcode for vlan notification or vn2vn vlan notification
+ * @dest: The destination Ethernet MAC address
+ * @min_len: minimum size of the Ethernet payload to be sent
+ */
+static void fcoe_ctlr_vlan_send(struct fcoe_ctlr *fip,
+ enum fip_vlan_subcode sub,
+ const u8 *dest)
+{
+ struct sk_buff *skb;
+ struct fip_vlan_notify_frame {
+ struct ethhdr eth;
+ struct fip_header fip;
+ struct fip_mac_desc mac;
+ struct fip_vlan_desc vlan;
+ } __packed * frame;
+ size_t len;
+ size_t dlen;
+
+ len = sizeof(*frame);
+ dlen = sizeof(frame->mac) + sizeof(frame->vlan);
+ len = max(len, sizeof(struct ethhdr));
+
+ skb = dev_alloc_skb(len);
+ if (!skb)
+ return;
+
+ LIBFCOE_FIP_DBG(fip, "fip %s vlan notification, vlan %d\n",
+ fip->mode == FIP_MODE_VN2VN ? "vn2vn" : "fcf",
+ fip->lp->vlan);
+
+ frame = (struct fip_vlan_notify_frame *)skb->data;
+ memset(frame, 0, len);
+ memcpy(frame->eth.h_dest, dest, ETH_ALEN);
+
+ memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
+ frame->eth.h_proto = htons(ETH_P_FIP);
+
+ frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
+ frame->fip.fip_op = htons(FIP_OP_VLAN);
+ frame->fip.fip_subcode = sub;
+ frame->fip.fip_dl_len = htons(dlen / FIP_BPW);
+
+ frame->mac.fd_desc.fip_dtype = FIP_DT_MAC;
+ frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW;
+ memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
+
+ frame->vlan.fd_desc.fip_dtype = FIP_DT_VLAN;
+ frame->vlan.fd_desc.fip_dlen = sizeof(frame->vlan) / FIP_BPW;
+ put_unaligned_be16(fip->lp->vlan, &frame->vlan.fd_vlan);
+
+ skb_put(skb, len);
+ skb->protocol = htons(ETH_P_FIP);
+ skb->priority = fip->priority;
+ skb_reset_mac_header(skb);
+ skb_reset_network_header(skb);
+
+ fip->send(fip, skb);
+}
+
+/**
+ * fcoe_ctlr_vlan_disk_reply() - send FIP VLAN Discovery Notification.
+ * @fip: The FCoE controller
+ *
+ * Called with ctlr_mutex held.
+ */
+static void fcoe_ctlr_vlan_disc_reply(struct fcoe_ctlr *fip,
+ struct fc_rport_priv *rdata)
+{
+ struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
+ enum fip_vlan_subcode sub = FIP_SC_VL_NOTE;
+
+ if (fip->mode == FIP_MODE_VN2VN)
+ sub = FIP_SC_VL_VN2VN_NOTE;
+
+ fcoe_ctlr_vlan_send(fip, sub, frport->enode_mac);
+}
+
+/**
+ * fcoe_ctlr_vlan_recv - vlan request receive handler for VN2VN mode.
+ * @lport: The local port
+ * @fp: The received frame
+ *
+ */
+static int fcoe_ctlr_vlan_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
+{
+ struct fip_header *fiph;
+ enum fip_vlan_subcode sub;
+ struct {
+ struct fc_rport_priv rdata;
+ struct fcoe_rport frport;
+ } buf;
+ int rc;
+
+ fiph = (struct fip_header *)skb->data;
+ sub = fiph->fip_subcode;
+ rc = fcoe_ctlr_vlan_parse(fip, skb, &buf.rdata);
+ if (rc) {
+ LIBFCOE_FIP_DBG(fip, "vlan_recv vlan_parse error %d\n", rc);
+ goto drop;
+ }
+ mutex_lock(&fip->ctlr_mutex);
+ if (sub == FIP_SC_VL_REQ)
+ fcoe_ctlr_vlan_disc_reply(fip, &buf.rdata);
+ mutex_unlock(&fip->ctlr_mutex);
+
+drop:
+ kfree_skb(skb);
+ return rc;
+}
+
+/**
+ * fcoe_ctlr_disc_recv - discovery receive handler for VN2VN mode.
+ * @lport: The local port
+ * @fp: The received frame
+ *
+ * This should never be called since we don't see RSCNs or other
+ * fabric-generated ELSes.
+ */
+static void fcoe_ctlr_disc_recv(struct fc_lport *lport, struct fc_frame *fp)
+{
+ struct fc_seq_els_data rjt_data;
+
+ rjt_data.reason = ELS_RJT_UNSUP;
+ rjt_data.explan = ELS_EXPL_NONE;
+ fc_seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data);
+ fc_frame_free(fp);
+}
+
+/**
+ * fcoe_ctlr_disc_recv - start discovery for VN2VN mode.
+ * @fip: The FCoE controller
+ *
+ * This sets a flag indicating that remote ports should be created
+ * and started for the peers we discover. We use the disc_callback
+ * pointer as that flag. Peers already discovered are created here.
+ *
+ * The lport lock is held during this call. The callback must be done
+ * later, without holding either the lport or discovery locks.
+ * The fcoe_ctlr lock may also be held during this call.
+ */
+static void fcoe_ctlr_disc_start(void (*callback)(struct fc_lport *,
+ enum fc_disc_event),
+ struct fc_lport *lport)
+{
+ struct fc_disc *disc = &lport->disc;
+ struct fcoe_ctlr *fip = disc->priv;
+
+ mutex_lock(&disc->disc_mutex);
+ disc->disc_callback = callback;
+ disc->disc_id = (disc->disc_id + 2) | 1;
+ disc->pending = 1;
+ schedule_work(&fip->timer_work);
+ mutex_unlock(&disc->disc_mutex);
+}
+
+/**
+ * fcoe_ctlr_vn_disc() - report FIP VN_port discovery results after claim state.
+ * @fip: The FCoE controller
+ *
+ * Starts the FLOGI and PLOGI login process to each discovered rport for which
+ * we've received at least one beacon.
+ * Performs the discovery complete callback.
+ */
+static void fcoe_ctlr_vn_disc(struct fcoe_ctlr *fip)
+{
+ struct fc_lport *lport = fip->lp;
+ struct fc_disc *disc = &lport->disc;
+ struct fc_rport_priv *rdata;
+ struct fcoe_rport *frport;
+ void (*callback)(struct fc_lport *, enum fc_disc_event);
+
+ mutex_lock(&disc->disc_mutex);
+ callback = disc->pending ? disc->disc_callback : NULL;
+ disc->pending = 0;
+ list_for_each_entry_rcu(rdata, &disc->rports, peers) {
+ if (!kref_get_unless_zero(&rdata->kref))
+ continue;
+ frport = fcoe_ctlr_rport(rdata);
+ if (frport->time)
+ fc_rport_login(rdata);
+ kref_put(&rdata->kref, fc_rport_destroy);
+ }
+ mutex_unlock(&disc->disc_mutex);
+ if (callback)
+ callback(lport, DISC_EV_SUCCESS);
+}
+
+/**
+ * fcoe_ctlr_vn_timeout - timer work function for VN2VN mode.
+ * @fip: The FCoE controller
+ */
+static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip)
+{
+ unsigned long next_time;
+ u8 mac[ETH_ALEN];
+ u32 new_port_id = 0;
+
+ mutex_lock(&fip->ctlr_mutex);
+ switch (fip->state) {
+ case FIP_ST_VNMP_START:
+ fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE1);
+ LIBFCOE_FIP_DBG(fip, "vn_timeout: send 1st probe request\n");
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
+ next_time = jiffies + msecs_to_jiffies(FIP_VN_PROBE_WAIT);
+ break;
+ case FIP_ST_VNMP_PROBE1:
+ fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE2);
+ LIBFCOE_FIP_DBG(fip, "vn_timeout: send 2nd probe request\n");
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
+ next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
+ break;
+ case FIP_ST_VNMP_PROBE2:
+ fcoe_ctlr_set_state(fip, FIP_ST_VNMP_CLAIM);
+ new_port_id = fip->port_id;
+ hton24(mac, FIP_VN_FC_MAP);
+ hton24(mac + 3, new_port_id);
+ fcoe_ctlr_map_dest(fip);
+ fip->update_mac(fip->lp, mac);
+ LIBFCOE_FIP_DBG(fip, "vn_timeout: send claim notify\n");
+ fcoe_ctlr_vn_send_claim(fip);
+ next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
+ break;
+ case FIP_ST_VNMP_CLAIM:
+ /*
+ * This may be invoked either by starting discovery so don't
+ * go to the next state unless it's been long enough.
+ */
+ next_time = fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT);
+ if (time_after_eq(jiffies, next_time)) {
+ fcoe_ctlr_set_state(fip, FIP_ST_VNMP_UP);
+ LIBFCOE_FIP_DBG(fip, "vn_timeout: send vn2vn beacon\n");
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
+ fcoe_all_vn2vn, 0);
+ next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
+ fip->port_ka_time = next_time;
+ }
+ fcoe_ctlr_vn_disc(fip);
+ break;
+ case FIP_ST_VNMP_UP:
+ next_time = fcoe_ctlr_vn_age(fip);
+ if (time_after_eq(jiffies, fip->port_ka_time)) {
+ LIBFCOE_FIP_DBG(fip, "vn_timeout: send vn2vn beacon\n");
+ fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
+ fcoe_all_vn2vn, 0);
+ fip->port_ka_time = jiffies +
+ msecs_to_jiffies(FIP_VN_BEACON_INT +
+ (prandom_u32() % FIP_VN_BEACON_FUZZ));
+ }
+ if (time_before(fip->port_ka_time, next_time))
+ next_time = fip->port_ka_time;
+ break;
+ case FIP_ST_LINK_WAIT:
+ goto unlock;
+ default:
+ WARN(1, "unexpected state %d\n", fip->state);
+ goto unlock;
+ }
+ mod_timer(&fip->timer, next_time);
+unlock:
+ mutex_unlock(&fip->ctlr_mutex);
+
+ /* If port ID is new, notify local port after dropping ctlr_mutex */
+ if (new_port_id)
+ fc_lport_set_local_id(fip->lp, new_port_id);
+}
+
+/**
+ * fcoe_ctlr_mode_set() - Set or reset the ctlr's mode
+ * @lport: The local port to be (re)configured
+ * @fip: The FCoE controller whose mode is changing
+ * @fip_mode: The new fip mode
+ *
+ * Note that the we shouldn't be changing the libfc discovery settings
+ * (fc_disc_config) while an lport is going through the libfc state
+ * machine. The mode can only be changed when a fcoe_ctlr device is
+ * disabled, so that should ensure that this routine is only called
+ * when nothing is happening.
+ */
+static void fcoe_ctlr_mode_set(struct fc_lport *lport, struct fcoe_ctlr *fip,
+ enum fip_mode fip_mode)
+{
+ void *priv;
+
+ WARN_ON(lport->state != LPORT_ST_RESET &&
+ lport->state != LPORT_ST_DISABLED);
+
+ if (fip_mode == FIP_MODE_VN2VN) {
+ lport->rport_priv_size = sizeof(struct fcoe_rport);
+ lport->point_to_multipoint = 1;
+ lport->tt.disc_recv_req = fcoe_ctlr_disc_recv;
+ lport->tt.disc_start = fcoe_ctlr_disc_start;
+ lport->tt.disc_stop = fcoe_ctlr_disc_stop;
+ lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final;
+ priv = fip;
+ } else {
+ lport->rport_priv_size = 0;
+ lport->point_to_multipoint = 0;
+ lport->tt.disc_recv_req = NULL;
+ lport->tt.disc_start = NULL;
+ lport->tt.disc_stop = NULL;
+ lport->tt.disc_stop_final = NULL;
+ priv = lport;
+ }
+
+ fc_disc_config(lport, priv);
+}
+
+/**
+ * fcoe_libfc_config() - Sets up libfc related properties for local port
+ * @lport: The local port to configure libfc for
+ * @fip: The FCoE controller in use by the local port
+ * @tt: The libfc function template
+ * @init_fcp: If non-zero, the FCP portion of libfc should be initialized
+ *
+ * Returns : 0 for success
+ */
+int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip,
+ const struct libfc_function_template *tt, int init_fcp)
+{
+ /* Set the function pointers set by the LLDD */
+ memcpy(&lport->tt, tt, sizeof(*tt));
+ if (init_fcp && fc_fcp_init(lport))
+ return -ENOMEM;
+ fc_exch_init(lport);
+ fc_elsct_init(lport);
+ fc_lport_init(lport);
+ fc_disc_init(lport);
+ fcoe_ctlr_mode_set(lport, fip, fip->mode);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fcoe_libfc_config);
+
+void fcoe_fcf_get_selected(struct fcoe_fcf_device *fcf_dev)
+{
+ struct fcoe_ctlr_device *ctlr_dev = fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
+ struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr_dev);
+ struct fcoe_fcf *fcf;
+
+ mutex_lock(&fip->ctlr_mutex);
+ mutex_lock(&ctlr_dev->lock);
+
+ fcf = fcoe_fcf_device_priv(fcf_dev);
+ if (fcf)
+ fcf_dev->selected = (fcf == fip->sel_fcf) ? 1 : 0;
+ else
+ fcf_dev->selected = 0;
+
+ mutex_unlock(&ctlr_dev->lock);
+ mutex_unlock(&fip->ctlr_mutex);
+}
+EXPORT_SYMBOL(fcoe_fcf_get_selected);
+
+void fcoe_ctlr_set_fip_mode(struct fcoe_ctlr_device *ctlr_dev)
+{
+ struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
+ struct fc_lport *lport = ctlr->lp;
+
+ mutex_lock(&ctlr->ctlr_mutex);
+ switch (ctlr_dev->mode) {
+ case FIP_CONN_TYPE_VN2VN:
+ ctlr->mode = FIP_MODE_VN2VN;
+ break;
+ case FIP_CONN_TYPE_FABRIC:
+ default:
+ ctlr->mode = FIP_MODE_FABRIC;
+ break;
+ }
+
+ mutex_unlock(&ctlr->ctlr_mutex);
+
+ fcoe_ctlr_mode_set(lport, ctlr, ctlr->mode);
+}
+EXPORT_SYMBOL(fcoe_ctlr_set_fip_mode);
diff --git a/drivers/scsi/fcoe/fcoe_sysfs.c b/drivers/scsi/fcoe/fcoe_sysfs.c
new file mode 100644
index 0000000..5c8310b
--- /dev/null
+++ b/drivers/scsi/fcoe/fcoe_sysfs.c
@@ -0,0 +1,1072 @@
+/*
+ * Copyright(c) 2011 - 2012 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/etherdevice.h>
+#include <linux/ctype.h>
+
+#include <scsi/fcoe_sysfs.h>
+#include <scsi/libfcoe.h>
+
+/*
+ * OK to include local libfcoe.h for debug_logging, but cannot include
+ * <scsi/libfcoe.h> otherwise non-netdev based fcoe solutions would have
+ * have to include more than fcoe_sysfs.h.
+ */
+#include "libfcoe.h"
+
+static atomic_t ctlr_num;
+static atomic_t fcf_num;
+
+/*
+ * fcoe_fcf_dev_loss_tmo: the default number of seconds that fcoe sysfs
+ * should insulate the loss of a fcf.
+ */
+static unsigned int fcoe_fcf_dev_loss_tmo = 1800; /* seconds */
+
+module_param_named(fcf_dev_loss_tmo, fcoe_fcf_dev_loss_tmo,
+ uint, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(fcf_dev_loss_tmo,
+ "Maximum number of seconds that libfcoe should"
+ " insulate the loss of a fcf. Once this value is"
+ " exceeded, the fcf is removed.");
+
+/*
+ * These are used by the fcoe_*_show_function routines, they
+ * are intentionally placed in the .c file as they're not intended
+ * for use throughout the code.
+ */
+#define fcoe_ctlr_id(x) \
+ ((x)->id)
+#define fcoe_ctlr_work_q_name(x) \
+ ((x)->work_q_name)
+#define fcoe_ctlr_work_q(x) \
+ ((x)->work_q)
+#define fcoe_ctlr_devloss_work_q_name(x) \
+ ((x)->devloss_work_q_name)
+#define fcoe_ctlr_devloss_work_q(x) \
+ ((x)->devloss_work_q)
+#define fcoe_ctlr_mode(x) \
+ ((x)->mode)
+#define fcoe_ctlr_fcf_dev_loss_tmo(x) \
+ ((x)->fcf_dev_loss_tmo)
+#define fcoe_ctlr_link_fail(x) \
+ ((x)->lesb.lesb_link_fail)
+#define fcoe_ctlr_vlink_fail(x) \
+ ((x)->lesb.lesb_vlink_fail)
+#define fcoe_ctlr_miss_fka(x) \
+ ((x)->lesb.lesb_miss_fka)
+#define fcoe_ctlr_symb_err(x) \
+ ((x)->lesb.lesb_symb_err)
+#define fcoe_ctlr_err_block(x) \
+ ((x)->lesb.lesb_err_block)
+#define fcoe_ctlr_fcs_error(x) \
+ ((x)->lesb.lesb_fcs_error)
+#define fcoe_ctlr_enabled(x) \
+ ((x)->enabled)
+#define fcoe_fcf_state(x) \
+ ((x)->state)
+#define fcoe_fcf_fabric_name(x) \
+ ((x)->fabric_name)
+#define fcoe_fcf_switch_name(x) \
+ ((x)->switch_name)
+#define fcoe_fcf_fc_map(x) \
+ ((x)->fc_map)
+#define fcoe_fcf_vfid(x) \
+ ((x)->vfid)
+#define fcoe_fcf_mac(x) \
+ ((x)->mac)
+#define fcoe_fcf_priority(x) \
+ ((x)->priority)
+#define fcoe_fcf_fka_period(x) \
+ ((x)->fka_period)
+#define fcoe_fcf_dev_loss_tmo(x) \
+ ((x)->dev_loss_tmo)
+#define fcoe_fcf_selected(x) \
+ ((x)->selected)
+#define fcoe_fcf_vlan_id(x) \
+ ((x)->vlan_id)
+
+/*
+ * dev_loss_tmo attribute
+ */
+static int fcoe_str_to_dev_loss(const char *buf, unsigned long *val)
+{
+ int ret;
+
+ ret = kstrtoul(buf, 0, val);
+ if (ret)
+ return -EINVAL;
+ /*
+ * Check for overflow; dev_loss_tmo is u32
+ */
+ if (*val > UINT_MAX)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int fcoe_fcf_set_dev_loss_tmo(struct fcoe_fcf_device *fcf,
+ unsigned long val)
+{
+ if ((fcf->state == FCOE_FCF_STATE_UNKNOWN) ||
+ (fcf->state == FCOE_FCF_STATE_DISCONNECTED) ||
+ (fcf->state == FCOE_FCF_STATE_DELETED))
+ return -EBUSY;
+ /*
+ * Check for overflow; dev_loss_tmo is u32
+ */
+ if (val > UINT_MAX)
+ return -EINVAL;
+
+ fcoe_fcf_dev_loss_tmo(fcf) = val;
+ return 0;
+}
+
+#define FCOE_DEVICE_ATTR(_prefix, _name, _mode, _show, _store) \
+struct device_attribute device_attr_fcoe_##_prefix##_##_name = \
+ __ATTR(_name, _mode, _show, _store)
+
+#define fcoe_ctlr_show_function(field, format_string, sz, cast) \
+static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \
+ if (ctlr->f->get_fcoe_ctlr_##field) \
+ ctlr->f->get_fcoe_ctlr_##field(ctlr); \
+ return snprintf(buf, sz, format_string, \
+ cast fcoe_ctlr_##field(ctlr)); \
+}
+
+#define fcoe_fcf_show_function(field, format_string, sz, cast) \
+static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \
+ struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf); \
+ if (ctlr->f->get_fcoe_fcf_##field) \
+ ctlr->f->get_fcoe_fcf_##field(fcf); \
+ return snprintf(buf, sz, format_string, \
+ cast fcoe_fcf_##field(fcf)); \
+}
+
+#define fcoe_ctlr_private_show_function(field, format_string, sz, cast) \
+static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \
+ return snprintf(buf, sz, format_string, cast fcoe_ctlr_##field(ctlr)); \
+}
+
+#define fcoe_fcf_private_show_function(field, format_string, sz, cast) \
+static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \
+ return snprintf(buf, sz, format_string, cast fcoe_fcf_##field(fcf)); \
+}
+
+#define fcoe_ctlr_private_rd_attr(field, format_string, sz) \
+ fcoe_ctlr_private_show_function(field, format_string, sz, ) \
+ static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
+ show_fcoe_ctlr_device_##field, NULL)
+
+#define fcoe_ctlr_rd_attr(field, format_string, sz) \
+ fcoe_ctlr_show_function(field, format_string, sz, ) \
+ static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
+ show_fcoe_ctlr_device_##field, NULL)
+
+#define fcoe_fcf_rd_attr(field, format_string, sz) \
+ fcoe_fcf_show_function(field, format_string, sz, ) \
+ static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
+ show_fcoe_fcf_device_##field, NULL)
+
+#define fcoe_fcf_private_rd_attr(field, format_string, sz) \
+ fcoe_fcf_private_show_function(field, format_string, sz, ) \
+ static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
+ show_fcoe_fcf_device_##field, NULL)
+
+#define fcoe_ctlr_private_rd_attr_cast(field, format_string, sz, cast) \
+ fcoe_ctlr_private_show_function(field, format_string, sz, (cast)) \
+ static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
+ show_fcoe_ctlr_device_##field, NULL)
+
+#define fcoe_fcf_private_rd_attr_cast(field, format_string, sz, cast) \
+ fcoe_fcf_private_show_function(field, format_string, sz, (cast)) \
+ static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
+ show_fcoe_fcf_device_##field, NULL)
+
+#define fcoe_enum_name_search(title, table_type, table) \
+static const char *get_fcoe_##title##_name(enum table_type table_key) \
+{ \
+ if (table_key < 0 || table_key >= ARRAY_SIZE(table)) \
+ return NULL; \
+ return table[table_key]; \
+}
+
+static char *fip_conn_type_names[] = {
+ [ FIP_CONN_TYPE_UNKNOWN ] = "Unknown",
+ [ FIP_CONN_TYPE_FABRIC ] = "Fabric",
+ [ FIP_CONN_TYPE_VN2VN ] = "VN2VN",
+};
+fcoe_enum_name_search(ctlr_mode, fip_conn_type, fip_conn_type_names)
+
+static enum fip_conn_type fcoe_parse_mode(const char *buf)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(fip_conn_type_names); i++) {
+ if (strcasecmp(buf, fip_conn_type_names[i]) == 0)
+ return i;
+ }
+
+ return FIP_CONN_TYPE_UNKNOWN;
+}
+
+static char *fcf_state_names[] = {
+ [ FCOE_FCF_STATE_UNKNOWN ] = "Unknown",
+ [ FCOE_FCF_STATE_DISCONNECTED ] = "Disconnected",
+ [ FCOE_FCF_STATE_CONNECTED ] = "Connected",
+};
+fcoe_enum_name_search(fcf_state, fcf_state, fcf_state_names)
+#define FCOE_FCF_STATE_MAX_NAMELEN 50
+
+static ssize_t show_fcf_state(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
+ const char *name;
+ name = get_fcoe_fcf_state_name(fcf->state);
+ if (!name)
+ return -EINVAL;
+ return snprintf(buf, FCOE_FCF_STATE_MAX_NAMELEN, "%s\n", name);
+}
+static FCOE_DEVICE_ATTR(fcf, state, S_IRUGO, show_fcf_state, NULL);
+
+#define FCOE_MAX_MODENAME_LEN 20
+static ssize_t show_ctlr_mode(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
+ const char *name;
+
+ name = get_fcoe_ctlr_mode_name(ctlr->mode);
+ if (!name)
+ return -EINVAL;
+ return snprintf(buf, FCOE_MAX_MODENAME_LEN,
+ "%s\n", name);
+}
+
+static ssize_t store_ctlr_mode(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
+ char mode[FCOE_MAX_MODENAME_LEN + 1];
+
+ if (count > FCOE_MAX_MODENAME_LEN)
+ return -EINVAL;
+
+ strncpy(mode, buf, count);
+
+ if (mode[count - 1] == '\n')
+ mode[count - 1] = '\0';
+ else
+ mode[count] = '\0';
+
+ switch (ctlr->enabled) {
+ case FCOE_CTLR_ENABLED:
+ LIBFCOE_SYSFS_DBG(ctlr, "Cannot change mode when enabled.\n");
+ return -EBUSY;
+ case FCOE_CTLR_DISABLED:
+ if (!ctlr->f->set_fcoe_ctlr_mode) {
+ LIBFCOE_SYSFS_DBG(ctlr,
+ "Mode change not supported by LLD.\n");
+ return -ENOTSUPP;
+ }
+
+ ctlr->mode = fcoe_parse_mode(mode);
+ if (ctlr->mode == FIP_CONN_TYPE_UNKNOWN) {
+ LIBFCOE_SYSFS_DBG(ctlr, "Unknown mode %s provided.\n",
+ buf);
+ return -EINVAL;
+ }
+
+ ctlr->f->set_fcoe_ctlr_mode(ctlr);
+ LIBFCOE_SYSFS_DBG(ctlr, "Mode changed to %s.\n", buf);
+
+ return count;
+ case FCOE_CTLR_UNUSED:
+ default:
+ LIBFCOE_SYSFS_DBG(ctlr, "Mode change not supported.\n");
+ return -ENOTSUPP;
+ };
+}
+
+static FCOE_DEVICE_ATTR(ctlr, mode, S_IRUGO | S_IWUSR,
+ show_ctlr_mode, store_ctlr_mode);
+
+static ssize_t store_ctlr_enabled(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
+ bool enabled;
+ int rc;
+
+ if (*buf == '1')
+ enabled = true;
+ else if (*buf == '0')
+ enabled = false;
+ else
+ return -EINVAL;
+
+ switch (ctlr->enabled) {
+ case FCOE_CTLR_ENABLED:
+ if (enabled)
+ return count;
+ ctlr->enabled = FCOE_CTLR_DISABLED;
+ break;
+ case FCOE_CTLR_DISABLED:
+ if (!enabled)
+ return count;
+ ctlr->enabled = FCOE_CTLR_ENABLED;
+ break;
+ case FCOE_CTLR_UNUSED:
+ return -ENOTSUPP;
+ };
+
+ rc = ctlr->f->set_fcoe_ctlr_enabled(ctlr);
+ if (rc)
+ return rc;
+
+ return count;
+}
+
+static char *ctlr_enabled_state_names[] = {
+ [ FCOE_CTLR_ENABLED ] = "1",
+ [ FCOE_CTLR_DISABLED ] = "0",
+};
+fcoe_enum_name_search(ctlr_enabled_state, ctlr_enabled_state,
+ ctlr_enabled_state_names)
+#define FCOE_CTLR_ENABLED_MAX_NAMELEN 50
+
+static ssize_t show_ctlr_enabled_state(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
+ const char *name;
+
+ name = get_fcoe_ctlr_enabled_state_name(ctlr->enabled);
+ if (!name)
+ return -EINVAL;
+ return snprintf(buf, FCOE_CTLR_ENABLED_MAX_NAMELEN,
+ "%s\n", name);
+}
+
+static FCOE_DEVICE_ATTR(ctlr, enabled, S_IRUGO | S_IWUSR,
+ show_ctlr_enabled_state,
+ store_ctlr_enabled);
+
+static ssize_t store_ctlr_fip_resp(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
+ struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr);
+
+ mutex_lock(&fip->ctlr_mutex);
+ if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
+ if (buf[0] == '1') {
+ fip->fip_resp = 1;
+ mutex_unlock(&fip->ctlr_mutex);
+ return count;
+ }
+ if (buf[0] == '0') {
+ fip->fip_resp = 0;
+ mutex_unlock(&fip->ctlr_mutex);
+ return count;
+ }
+ }
+ mutex_unlock(&fip->ctlr_mutex);
+ return -EINVAL;
+}
+
+static ssize_t show_ctlr_fip_resp(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
+ struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr);
+
+ return sprintf(buf, "%d\n", fip->fip_resp ? 1 : 0);
+}
+
+static FCOE_DEVICE_ATTR(ctlr, fip_vlan_responder, S_IRUGO | S_IWUSR,
+ show_ctlr_fip_resp,
+ store_ctlr_fip_resp);
+
+static ssize_t
+fcoe_ctlr_var_store(u32 *var, const char *buf, size_t count)
+{
+ int err;
+ unsigned long v;
+
+ err = kstrtoul(buf, 10, &v);
+ if (err || v > UINT_MAX)
+ return -EINVAL;
+
+ *var = v;
+
+ return count;
+}
+
+static ssize_t store_ctlr_r_a_tov(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
+ struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
+
+ if (ctlr_dev->enabled == FCOE_CTLR_ENABLED)
+ return -EBUSY;
+ if (ctlr_dev->enabled == FCOE_CTLR_DISABLED)
+ return fcoe_ctlr_var_store(&ctlr->lp->r_a_tov, buf, count);
+ return -ENOTSUPP;
+}
+
+static ssize_t show_ctlr_r_a_tov(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
+ struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
+
+ return sprintf(buf, "%d\n", ctlr->lp->r_a_tov);
+}
+
+static FCOE_DEVICE_ATTR(ctlr, r_a_tov, S_IRUGO | S_IWUSR,
+ show_ctlr_r_a_tov, store_ctlr_r_a_tov);
+
+static ssize_t store_ctlr_e_d_tov(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
+ struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
+
+ if (ctlr_dev->enabled == FCOE_CTLR_ENABLED)
+ return -EBUSY;
+ if (ctlr_dev->enabled == FCOE_CTLR_DISABLED)
+ return fcoe_ctlr_var_store(&ctlr->lp->e_d_tov, buf, count);
+ return -ENOTSUPP;
+}
+
+static ssize_t show_ctlr_e_d_tov(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
+ struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
+
+ return sprintf(buf, "%d\n", ctlr->lp->e_d_tov);
+}
+
+static FCOE_DEVICE_ATTR(ctlr, e_d_tov, S_IRUGO | S_IWUSR,
+ show_ctlr_e_d_tov, store_ctlr_e_d_tov);
+
+static ssize_t
+store_private_fcoe_ctlr_fcf_dev_loss_tmo(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
+ struct fcoe_fcf_device *fcf;
+ unsigned long val;
+ int rc;
+
+ rc = fcoe_str_to_dev_loss(buf, &val);
+ if (rc)
+ return rc;
+
+ fcoe_ctlr_fcf_dev_loss_tmo(ctlr) = val;
+ mutex_lock(&ctlr->lock);
+ list_for_each_entry(fcf, &ctlr->fcfs, peers)
+ fcoe_fcf_set_dev_loss_tmo(fcf, val);
+ mutex_unlock(&ctlr->lock);
+ return count;
+}
+fcoe_ctlr_private_show_function(fcf_dev_loss_tmo, "%d\n", 20, );
+static FCOE_DEVICE_ATTR(ctlr, fcf_dev_loss_tmo, S_IRUGO | S_IWUSR,
+ show_fcoe_ctlr_device_fcf_dev_loss_tmo,
+ store_private_fcoe_ctlr_fcf_dev_loss_tmo);
+
+/* Link Error Status Block (LESB) */
+fcoe_ctlr_rd_attr(link_fail, "%u\n", 20);
+fcoe_ctlr_rd_attr(vlink_fail, "%u\n", 20);
+fcoe_ctlr_rd_attr(miss_fka, "%u\n", 20);
+fcoe_ctlr_rd_attr(symb_err, "%u\n", 20);
+fcoe_ctlr_rd_attr(err_block, "%u\n", 20);
+fcoe_ctlr_rd_attr(fcs_error, "%u\n", 20);
+
+fcoe_fcf_private_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
+fcoe_fcf_private_rd_attr_cast(switch_name, "0x%llx\n", 20, unsigned long long);
+fcoe_fcf_private_rd_attr(priority, "%u\n", 20);
+fcoe_fcf_private_rd_attr(fc_map, "0x%x\n", 20);
+fcoe_fcf_private_rd_attr(vfid, "%u\n", 20);
+fcoe_fcf_private_rd_attr(mac, "%pM\n", 20);
+fcoe_fcf_private_rd_attr(fka_period, "%u\n", 20);
+fcoe_fcf_rd_attr(selected, "%u\n", 20);
+fcoe_fcf_rd_attr(vlan_id, "%u\n", 20);
+
+fcoe_fcf_private_show_function(dev_loss_tmo, "%d\n", 20, )
+static ssize_t
+store_fcoe_fcf_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
+ unsigned long val;
+ int rc;
+
+ rc = fcoe_str_to_dev_loss(buf, &val);
+ if (rc)
+ return rc;
+
+ rc = fcoe_fcf_set_dev_loss_tmo(fcf, val);
+ if (rc)
+ return rc;
+ return count;
+}
+static FCOE_DEVICE_ATTR(fcf, dev_loss_tmo, S_IRUGO | S_IWUSR,
+ show_fcoe_fcf_device_dev_loss_tmo,
+ store_fcoe_fcf_dev_loss_tmo);
+
+static struct attribute *fcoe_ctlr_lesb_attrs[] = {
+ &device_attr_fcoe_ctlr_link_fail.attr,
+ &device_attr_fcoe_ctlr_vlink_fail.attr,
+ &device_attr_fcoe_ctlr_miss_fka.attr,
+ &device_attr_fcoe_ctlr_symb_err.attr,
+ &device_attr_fcoe_ctlr_err_block.attr,
+ &device_attr_fcoe_ctlr_fcs_error.attr,
+ NULL,
+};
+
+static struct attribute_group fcoe_ctlr_lesb_attr_group = {
+ .name = "lesb",
+ .attrs = fcoe_ctlr_lesb_attrs,
+};
+
+static struct attribute *fcoe_ctlr_attrs[] = {
+ &device_attr_fcoe_ctlr_fip_vlan_responder.attr,
+ &device_attr_fcoe_ctlr_fcf_dev_loss_tmo.attr,
+ &device_attr_fcoe_ctlr_r_a_tov.attr,
+ &device_attr_fcoe_ctlr_e_d_tov.attr,
+ &device_attr_fcoe_ctlr_enabled.attr,
+ &device_attr_fcoe_ctlr_mode.attr,
+ NULL,
+};
+
+static struct attribute_group fcoe_ctlr_attr_group = {
+ .attrs = fcoe_ctlr_attrs,
+};
+
+static const struct attribute_group *fcoe_ctlr_attr_groups[] = {
+ &fcoe_ctlr_attr_group,
+ &fcoe_ctlr_lesb_attr_group,
+ NULL,
+};
+
+static struct attribute *fcoe_fcf_attrs[] = {
+ &device_attr_fcoe_fcf_fabric_name.attr,
+ &device_attr_fcoe_fcf_switch_name.attr,
+ &device_attr_fcoe_fcf_dev_loss_tmo.attr,
+ &device_attr_fcoe_fcf_fc_map.attr,
+ &device_attr_fcoe_fcf_vfid.attr,
+ &device_attr_fcoe_fcf_mac.attr,
+ &device_attr_fcoe_fcf_priority.attr,
+ &device_attr_fcoe_fcf_fka_period.attr,
+ &device_attr_fcoe_fcf_state.attr,
+ &device_attr_fcoe_fcf_selected.attr,
+ &device_attr_fcoe_fcf_vlan_id.attr,
+ NULL
+};
+
+static struct attribute_group fcoe_fcf_attr_group = {
+ .attrs = fcoe_fcf_attrs,
+};
+
+static const struct attribute_group *fcoe_fcf_attr_groups[] = {
+ &fcoe_fcf_attr_group,
+ NULL,
+};
+
+static struct bus_type fcoe_bus_type;
+
+static int fcoe_bus_match(struct device *dev,
+ struct device_driver *drv)
+{
+ if (dev->bus == &fcoe_bus_type)
+ return 1;
+ return 0;
+}
+
+/**
+ * fcoe_ctlr_device_release() - Release the FIP ctlr memory
+ * @dev: Pointer to the FIP ctlr's embedded device
+ *
+ * Called when the last FIP ctlr reference is released.
+ */
+static void fcoe_ctlr_device_release(struct device *dev)
+{
+ struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
+ kfree(ctlr);
+}
+
+/**
+ * fcoe_fcf_device_release() - Release the FIP fcf memory
+ * @dev: Pointer to the fcf's embedded device
+ *
+ * Called when the last FIP fcf reference is released.
+ */
+static void fcoe_fcf_device_release(struct device *dev)
+{
+ struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
+ kfree(fcf);
+}
+
+static const struct device_type fcoe_ctlr_device_type = {
+ .name = "fcoe_ctlr",
+ .groups = fcoe_ctlr_attr_groups,
+ .release = fcoe_ctlr_device_release,
+};
+
+static const struct device_type fcoe_fcf_device_type = {
+ .name = "fcoe_fcf",
+ .groups = fcoe_fcf_attr_groups,
+ .release = fcoe_fcf_device_release,
+};
+
+static BUS_ATTR(ctlr_create, S_IWUSR, NULL, fcoe_ctlr_create_store);
+static BUS_ATTR(ctlr_destroy, S_IWUSR, NULL, fcoe_ctlr_destroy_store);
+
+static struct attribute *fcoe_bus_attrs[] = {
+ &bus_attr_ctlr_create.attr,
+ &bus_attr_ctlr_destroy.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(fcoe_bus);
+
+static struct bus_type fcoe_bus_type = {
+ .name = "fcoe",
+ .match = &fcoe_bus_match,
+ .bus_groups = fcoe_bus_groups,
+};
+
+/**
+ * fcoe_ctlr_device_flush_work() - Flush a FIP ctlr's workqueue
+ * @ctlr: Pointer to the FIP ctlr whose workqueue is to be flushed
+ */
+static void fcoe_ctlr_device_flush_work(struct fcoe_ctlr_device *ctlr)
+{
+ if (!fcoe_ctlr_work_q(ctlr)) {
+ printk(KERN_ERR
+ "ERROR: FIP Ctlr '%d' attempted to flush work, "
+ "when no workqueue created.\n", ctlr->id);
+ dump_stack();
+ return;
+ }
+
+ flush_workqueue(fcoe_ctlr_work_q(ctlr));
+}
+
+/**
+ * fcoe_ctlr_device_queue_work() - Schedule work for a FIP ctlr's workqueue
+ * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
+ * @work: Work to queue for execution
+ *
+ * Return value:
+ * 1 on success / 0 already queued / < 0 for error
+ */
+static int fcoe_ctlr_device_queue_work(struct fcoe_ctlr_device *ctlr,
+ struct work_struct *work)
+{
+ if (unlikely(!fcoe_ctlr_work_q(ctlr))) {
+ printk(KERN_ERR
+ "ERROR: FIP Ctlr '%d' attempted to queue work, "
+ "when no workqueue created.\n", ctlr->id);
+ dump_stack();
+
+ return -EINVAL;
+ }
+
+ return queue_work(fcoe_ctlr_work_q(ctlr), work);
+}
+
+/**
+ * fcoe_ctlr_device_flush_devloss() - Flush a FIP ctlr's devloss workqueue
+ * @ctlr: Pointer to FIP ctlr whose workqueue is to be flushed
+ */
+static void fcoe_ctlr_device_flush_devloss(struct fcoe_ctlr_device *ctlr)
+{
+ if (!fcoe_ctlr_devloss_work_q(ctlr)) {
+ printk(KERN_ERR
+ "ERROR: FIP Ctlr '%d' attempted to flush work, "
+ "when no workqueue created.\n", ctlr->id);
+ dump_stack();
+ return;
+ }
+
+ flush_workqueue(fcoe_ctlr_devloss_work_q(ctlr));
+}
+
+/**
+ * fcoe_ctlr_device_queue_devloss_work() - Schedule work for a FIP ctlr's devloss workqueue
+ * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
+ * @work: Work to queue for execution
+ * @delay: jiffies to delay the work queuing
+ *
+ * Return value:
+ * 1 on success / 0 already queued / < 0 for error
+ */
+static int fcoe_ctlr_device_queue_devloss_work(struct fcoe_ctlr_device *ctlr,
+ struct delayed_work *work,
+ unsigned long delay)
+{
+ if (unlikely(!fcoe_ctlr_devloss_work_q(ctlr))) {
+ printk(KERN_ERR
+ "ERROR: FIP Ctlr '%d' attempted to queue work, "
+ "when no workqueue created.\n", ctlr->id);
+ dump_stack();
+
+ return -EINVAL;
+ }
+
+ return queue_delayed_work(fcoe_ctlr_devloss_work_q(ctlr), work, delay);
+}
+
+static int fcoe_fcf_device_match(struct fcoe_fcf_device *new,
+ struct fcoe_fcf_device *old)
+{
+ if (new->switch_name == old->switch_name &&
+ new->fabric_name == old->fabric_name &&
+ new->fc_map == old->fc_map &&
+ ether_addr_equal(new->mac, old->mac))
+ return 1;
+ return 0;
+}
+
+/**
+ * fcoe_ctlr_device_add() - Add a FIP ctlr to sysfs
+ * @parent: The parent device to which the fcoe_ctlr instance
+ * should be attached
+ * @f: The LLD's FCoE sysfs function template pointer
+ * @priv_size: Size to be allocated with the fcoe_ctlr_device for the LLD
+ *
+ * This routine allocates a FIP ctlr object with some additional memory
+ * for the LLD. The FIP ctlr is initialized, added to sysfs and then
+ * attributes are added to it.
+ */
+struct fcoe_ctlr_device *fcoe_ctlr_device_add(struct device *parent,
+ struct fcoe_sysfs_function_template *f,
+ int priv_size)
+{
+ struct fcoe_ctlr_device *ctlr;
+ int error = 0;
+
+ ctlr = kzalloc(sizeof(struct fcoe_ctlr_device) + priv_size,
+ GFP_KERNEL);
+ if (!ctlr)
+ goto out;
+
+ ctlr->id = atomic_inc_return(&ctlr_num) - 1;
+ ctlr->f = f;
+ ctlr->mode = FIP_CONN_TYPE_FABRIC;
+ INIT_LIST_HEAD(&ctlr->fcfs);
+ mutex_init(&ctlr->lock);
+ ctlr->dev.parent = parent;
+ ctlr->dev.bus = &fcoe_bus_type;
+ ctlr->dev.type = &fcoe_ctlr_device_type;
+
+ ctlr->fcf_dev_loss_tmo = fcoe_fcf_dev_loss_tmo;
+
+ snprintf(ctlr->work_q_name, sizeof(ctlr->work_q_name),
+ "ctlr_wq_%d", ctlr->id);
+ ctlr->work_q = create_singlethread_workqueue(
+ ctlr->work_q_name);
+ if (!ctlr->work_q)
+ goto out_del;
+
+ snprintf(ctlr->devloss_work_q_name,
+ sizeof(ctlr->devloss_work_q_name),
+ "ctlr_dl_wq_%d", ctlr->id);
+ ctlr->devloss_work_q = create_singlethread_workqueue(
+ ctlr->devloss_work_q_name);
+ if (!ctlr->devloss_work_q)
+ goto out_del_q;
+
+ dev_set_name(&ctlr->dev, "ctlr_%d", ctlr->id);
+ error = device_register(&ctlr->dev);
+ if (error)
+ goto out_del_q2;
+
+ return ctlr;
+
+out_del_q2:
+ destroy_workqueue(ctlr->devloss_work_q);
+ ctlr->devloss_work_q = NULL;
+out_del_q:
+ destroy_workqueue(ctlr->work_q);
+ ctlr->work_q = NULL;
+out_del:
+ kfree(ctlr);
+out:
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(fcoe_ctlr_device_add);
+
+/**
+ * fcoe_ctlr_device_delete() - Delete a FIP ctlr and its subtree from sysfs
+ * @ctlr: A pointer to the ctlr to be deleted
+ *
+ * Deletes a FIP ctlr and any fcfs attached
+ * to it. Deleting fcfs will cause their childen
+ * to be deleted as well.
+ *
+ * The ctlr is detached from sysfs and it's resources
+ * are freed (work q), but the memory is not freed
+ * until its last reference is released.
+ *
+ * This routine expects no locks to be held before
+ * calling.
+ *
+ * TODO: Currently there are no callbacks to clean up LLD data
+ * for a fcoe_fcf_device. LLDs must keep this in mind as they need
+ * to clean up each of their LLD data for all fcoe_fcf_device before
+ * calling fcoe_ctlr_device_delete.
+ */
+void fcoe_ctlr_device_delete(struct fcoe_ctlr_device *ctlr)
+{
+ struct fcoe_fcf_device *fcf, *next;
+ /* Remove any attached fcfs */
+ mutex_lock(&ctlr->lock);
+ list_for_each_entry_safe(fcf, next,
+ &ctlr->fcfs, peers) {
+ list_del(&fcf->peers);
+ fcf->state = FCOE_FCF_STATE_DELETED;
+ fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work);
+ }
+ mutex_unlock(&ctlr->lock);
+
+ fcoe_ctlr_device_flush_work(ctlr);
+
+ destroy_workqueue(ctlr->devloss_work_q);
+ ctlr->devloss_work_q = NULL;
+ destroy_workqueue(ctlr->work_q);
+ ctlr->work_q = NULL;
+
+ device_unregister(&ctlr->dev);
+}
+EXPORT_SYMBOL_GPL(fcoe_ctlr_device_delete);
+
+/**
+ * fcoe_fcf_device_final_delete() - Final delete routine
+ * @work: The FIP fcf's embedded work struct
+ *
+ * It is expected that the fcf has been removed from
+ * the FIP ctlr's list before calling this routine.
+ */
+static void fcoe_fcf_device_final_delete(struct work_struct *work)
+{
+ struct fcoe_fcf_device *fcf =
+ container_of(work, struct fcoe_fcf_device, delete_work);
+ struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
+
+ /*
+ * Cancel any outstanding timers. These should really exist
+ * only when rmmod'ing the LLDD and we're asking for
+ * immediate termination of the rports
+ */
+ if (!cancel_delayed_work(&fcf->dev_loss_work))
+ fcoe_ctlr_device_flush_devloss(ctlr);
+
+ device_unregister(&fcf->dev);
+}
+
+/**
+ * fip_timeout_deleted_fcf() - Delete a fcf when the devloss timer fires
+ * @work: The FIP fcf's embedded work struct
+ *
+ * Removes the fcf from the FIP ctlr's list of fcfs and
+ * queues the final deletion.
+ */
+static void fip_timeout_deleted_fcf(struct work_struct *work)
+{
+ struct fcoe_fcf_device *fcf =
+ container_of(work, struct fcoe_fcf_device, dev_loss_work.work);
+ struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
+
+ mutex_lock(&ctlr->lock);
+
+ /*
+ * If the fcf is deleted or reconnected before the timer
+ * fires the devloss queue will be flushed, but the state will
+ * either be CONNECTED or DELETED. If that is the case we
+ * cancel deleting the fcf.
+ */
+ if (fcf->state != FCOE_FCF_STATE_DISCONNECTED)
+ goto out;
+
+ dev_printk(KERN_ERR, &fcf->dev,
+ "FIP fcf connection time out: removing fcf\n");
+
+ list_del(&fcf->peers);
+ fcf->state = FCOE_FCF_STATE_DELETED;
+ fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work);
+
+out:
+ mutex_unlock(&ctlr->lock);
+}
+
+/**
+ * fcoe_fcf_device_delete() - Delete a FIP fcf
+ * @fcf: Pointer to the fcf which is to be deleted
+ *
+ * Queues the FIP fcf on the devloss workqueue
+ *
+ * Expects the ctlr_attrs mutex to be held for fcf
+ * state change.
+ */
+void fcoe_fcf_device_delete(struct fcoe_fcf_device *fcf)
+{
+ struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
+ int timeout = fcf->dev_loss_tmo;
+
+ if (fcf->state != FCOE_FCF_STATE_CONNECTED)
+ return;
+
+ fcf->state = FCOE_FCF_STATE_DISCONNECTED;
+
+ /*
+ * FCF will only be re-connected by the LLD calling
+ * fcoe_fcf_device_add, and it should be setting up
+ * priv then.
+ */
+ fcf->priv = NULL;
+
+ fcoe_ctlr_device_queue_devloss_work(ctlr, &fcf->dev_loss_work,
+ timeout * HZ);
+}
+EXPORT_SYMBOL_GPL(fcoe_fcf_device_delete);
+
+/**
+ * fcoe_fcf_device_add() - Add a FCoE sysfs fcoe_fcf_device to the system
+ * @ctlr: The fcoe_ctlr_device that will be the fcoe_fcf_device parent
+ * @new_fcf: A temporary FCF used for lookups on the current list of fcfs
+ *
+ * Expects to be called with the ctlr->lock held
+ */
+struct fcoe_fcf_device *fcoe_fcf_device_add(struct fcoe_ctlr_device *ctlr,
+ struct fcoe_fcf_device *new_fcf)
+{
+ struct fcoe_fcf_device *fcf;
+ int error = 0;
+
+ list_for_each_entry(fcf, &ctlr->fcfs, peers) {
+ if (fcoe_fcf_device_match(new_fcf, fcf)) {
+ if (fcf->state == FCOE_FCF_STATE_CONNECTED)
+ return fcf;
+
+ fcf->state = FCOE_FCF_STATE_CONNECTED;
+
+ if (!cancel_delayed_work(&fcf->dev_loss_work))
+ fcoe_ctlr_device_flush_devloss(ctlr);
+
+ return fcf;
+ }
+ }
+
+ fcf = kzalloc(sizeof(struct fcoe_fcf_device), GFP_ATOMIC);
+ if (unlikely(!fcf))
+ goto out;
+
+ INIT_WORK(&fcf->delete_work, fcoe_fcf_device_final_delete);
+ INIT_DELAYED_WORK(&fcf->dev_loss_work, fip_timeout_deleted_fcf);
+
+ fcf->dev.parent = &ctlr->dev;
+ fcf->dev.bus = &fcoe_bus_type;
+ fcf->dev.type = &fcoe_fcf_device_type;
+ fcf->id = atomic_inc_return(&fcf_num) - 1;
+ fcf->state = FCOE_FCF_STATE_UNKNOWN;
+
+ fcf->dev_loss_tmo = ctlr->fcf_dev_loss_tmo;
+
+ dev_set_name(&fcf->dev, "fcf_%d", fcf->id);
+
+ fcf->fabric_name = new_fcf->fabric_name;
+ fcf->switch_name = new_fcf->switch_name;
+ fcf->fc_map = new_fcf->fc_map;
+ fcf->vfid = new_fcf->vfid;
+ memcpy(fcf->mac, new_fcf->mac, ETH_ALEN);
+ fcf->priority = new_fcf->priority;
+ fcf->fka_period = new_fcf->fka_period;
+ fcf->selected = new_fcf->selected;
+
+ error = device_register(&fcf->dev);
+ if (error)
+ goto out_del;
+
+ fcf->state = FCOE_FCF_STATE_CONNECTED;
+ list_add_tail(&fcf->peers, &ctlr->fcfs);
+
+ return fcf;
+
+out_del:
+ kfree(fcf);
+out:
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(fcoe_fcf_device_add);
+
+int __init fcoe_sysfs_setup(void)
+{
+ int error;
+
+ atomic_set(&ctlr_num, 0);
+ atomic_set(&fcf_num, 0);
+
+ error = bus_register(&fcoe_bus_type);
+ if (error)
+ return error;
+
+ return 0;
+}
+
+void __exit fcoe_sysfs_teardown(void)
+{
+ bus_unregister(&fcoe_bus_type);
+}
diff --git a/drivers/scsi/fcoe/fcoe_transport.c b/drivers/scsi/fcoe/fcoe_transport.c
new file mode 100644
index 0000000..f4909cd
--- /dev/null
+++ b/drivers/scsi/fcoe/fcoe_transport.c
@@ -0,0 +1,1069 @@
+/*
+ * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/errno.h>
+#include <linux/crc32.h>
+#include <scsi/libfcoe.h>
+
+#include "libfcoe.h"
+
+MODULE_AUTHOR("Open-FCoE.org");
+MODULE_DESCRIPTION("FIP discovery protocol and FCoE transport for FCoE HBAs");
+MODULE_LICENSE("GPL v2");
+
+static int fcoe_transport_create(const char *, const struct kernel_param *);
+static int fcoe_transport_destroy(const char *, const struct kernel_param *);
+static int fcoe_transport_show(char *buffer, const struct kernel_param *kp);
+static struct fcoe_transport *fcoe_transport_lookup(struct net_device *device);
+static struct fcoe_transport *fcoe_netdev_map_lookup(struct net_device *device);
+static int fcoe_transport_enable(const char *, const struct kernel_param *);
+static int fcoe_transport_disable(const char *, const struct kernel_param *);
+static int libfcoe_device_notification(struct notifier_block *notifier,
+ ulong event, void *ptr);
+
+static LIST_HEAD(fcoe_transports);
+static DEFINE_MUTEX(ft_mutex);
+static LIST_HEAD(fcoe_netdevs);
+static DEFINE_MUTEX(fn_mutex);
+
+unsigned int libfcoe_debug_logging;
+module_param_named(debug_logging, libfcoe_debug_logging, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
+
+module_param_call(show, NULL, fcoe_transport_show, NULL, S_IRUSR);
+__MODULE_PARM_TYPE(show, "string");
+MODULE_PARM_DESC(show, " Show attached FCoE transports");
+
+module_param_call(create, fcoe_transport_create, NULL,
+ (void *)FIP_MODE_FABRIC, S_IWUSR);
+__MODULE_PARM_TYPE(create, "string");
+MODULE_PARM_DESC(create, " Creates fcoe instance on an ethernet interface");
+
+module_param_call(create_vn2vn, fcoe_transport_create, NULL,
+ (void *)FIP_MODE_VN2VN, S_IWUSR);
+__MODULE_PARM_TYPE(create_vn2vn, "string");
+MODULE_PARM_DESC(create_vn2vn, " Creates a VN_node to VN_node FCoE instance "
+ "on an Ethernet interface");
+
+module_param_call(destroy, fcoe_transport_destroy, NULL, NULL, S_IWUSR);
+__MODULE_PARM_TYPE(destroy, "string");
+MODULE_PARM_DESC(destroy, " Destroys fcoe instance on an ethernet interface");
+
+module_param_call(enable, fcoe_transport_enable, NULL, NULL, S_IWUSR);
+__MODULE_PARM_TYPE(enable, "string");
+MODULE_PARM_DESC(enable, " Enables fcoe on an ethernet interface.");
+
+module_param_call(disable, fcoe_transport_disable, NULL, NULL, S_IWUSR);
+__MODULE_PARM_TYPE(disable, "string");
+MODULE_PARM_DESC(disable, " Disables fcoe on an ethernet interface.");
+
+/* notification function for packets from net device */
+static struct notifier_block libfcoe_notifier = {
+ .notifier_call = libfcoe_device_notification,
+};
+
+static const struct {
+ u32 fc_port_speed;
+#define SPEED_2000 2000
+#define SPEED_4000 4000
+#define SPEED_8000 8000
+#define SPEED_16000 16000
+#define SPEED_32000 32000
+ u32 eth_port_speed;
+} fcoe_port_speed_mapping[] = {
+ { FC_PORTSPEED_1GBIT, SPEED_1000 },
+ { FC_PORTSPEED_2GBIT, SPEED_2000 },
+ { FC_PORTSPEED_4GBIT, SPEED_4000 },
+ { FC_PORTSPEED_8GBIT, SPEED_8000 },
+ { FC_PORTSPEED_10GBIT, SPEED_10000 },
+ { FC_PORTSPEED_16GBIT, SPEED_16000 },
+ { FC_PORTSPEED_20GBIT, SPEED_20000 },
+ { FC_PORTSPEED_25GBIT, SPEED_25000 },
+ { FC_PORTSPEED_32GBIT, SPEED_32000 },
+ { FC_PORTSPEED_40GBIT, SPEED_40000 },
+ { FC_PORTSPEED_50GBIT, SPEED_50000 },
+ { FC_PORTSPEED_100GBIT, SPEED_100000 },
+};
+
+static inline u32 eth2fc_speed(u32 eth_port_speed)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(fcoe_port_speed_mapping); i++) {
+ if (fcoe_port_speed_mapping[i].eth_port_speed == eth_port_speed)
+ return fcoe_port_speed_mapping[i].fc_port_speed;
+ }
+
+ return FC_PORTSPEED_UNKNOWN;
+}
+
+/**
+ * fcoe_link_speed_update() - Update the supported and actual link speeds
+ * @lport: The local port to update speeds for
+ *
+ * Returns: 0 if the ethtool query was successful
+ * -1 if the ethtool query failed
+ */
+int fcoe_link_speed_update(struct fc_lport *lport)
+{
+ struct net_device *netdev = fcoe_get_netdev(lport);
+ struct ethtool_link_ksettings ecmd;
+
+ if (!__ethtool_get_link_ksettings(netdev, &ecmd)) {
+ lport->link_supported_speeds &= ~(FC_PORTSPEED_1GBIT |
+ FC_PORTSPEED_10GBIT |
+ FC_PORTSPEED_20GBIT |
+ FC_PORTSPEED_40GBIT);
+
+ if (ecmd.link_modes.supported[0] & (
+ SUPPORTED_1000baseT_Half |
+ SUPPORTED_1000baseT_Full |
+ SUPPORTED_1000baseKX_Full))
+ lport->link_supported_speeds |= FC_PORTSPEED_1GBIT;
+
+ if (ecmd.link_modes.supported[0] & (
+ SUPPORTED_10000baseT_Full |
+ SUPPORTED_10000baseKX4_Full |
+ SUPPORTED_10000baseKR_Full |
+ SUPPORTED_10000baseR_FEC))
+ lport->link_supported_speeds |= FC_PORTSPEED_10GBIT;
+
+ if (ecmd.link_modes.supported[0] & (
+ SUPPORTED_20000baseMLD2_Full |
+ SUPPORTED_20000baseKR2_Full))
+ lport->link_supported_speeds |= FC_PORTSPEED_20GBIT;
+
+ if (ecmd.link_modes.supported[0] & (
+ SUPPORTED_40000baseKR4_Full |
+ SUPPORTED_40000baseCR4_Full |
+ SUPPORTED_40000baseSR4_Full |
+ SUPPORTED_40000baseLR4_Full))
+ lport->link_supported_speeds |= FC_PORTSPEED_40GBIT;
+
+ lport->link_speed = eth2fc_speed(ecmd.base.speed);
+ return 0;
+ }
+ return -1;
+}
+EXPORT_SYMBOL_GPL(fcoe_link_speed_update);
+
+/**
+ * __fcoe_get_lesb() - Get the Link Error Status Block (LESB) for a given lport
+ * @lport: The local port to update speeds for
+ * @fc_lesb: Pointer to the LESB to be filled up
+ * @netdev: Pointer to the netdev that is associated with the lport
+ *
+ * Note, the Link Error Status Block (LESB) for FCoE is defined in FC-BB-6
+ * Clause 7.11 in v1.04.
+ */
+void __fcoe_get_lesb(struct fc_lport *lport,
+ struct fc_els_lesb *fc_lesb,
+ struct net_device *netdev)
+{
+ unsigned int cpu;
+ u32 lfc, vlfc, mdac;
+ struct fc_stats *stats;
+ struct fcoe_fc_els_lesb *lesb;
+ struct rtnl_link_stats64 temp;
+
+ lfc = 0;
+ vlfc = 0;
+ mdac = 0;
+ lesb = (struct fcoe_fc_els_lesb *)fc_lesb;
+ memset(lesb, 0, sizeof(*lesb));
+ for_each_possible_cpu(cpu) {
+ stats = per_cpu_ptr(lport->stats, cpu);
+ lfc += stats->LinkFailureCount;
+ vlfc += stats->VLinkFailureCount;
+ mdac += stats->MissDiscAdvCount;
+ }
+ lesb->lesb_link_fail = htonl(lfc);
+ lesb->lesb_vlink_fail = htonl(vlfc);
+ lesb->lesb_miss_fka = htonl(mdac);
+ lesb->lesb_fcs_error =
+ htonl(dev_get_stats(netdev, &temp)->rx_crc_errors);
+}
+EXPORT_SYMBOL_GPL(__fcoe_get_lesb);
+
+/**
+ * fcoe_get_lesb() - Fill the FCoE Link Error Status Block
+ * @lport: the local port
+ * @fc_lesb: the link error status block
+ */
+void fcoe_get_lesb(struct fc_lport *lport,
+ struct fc_els_lesb *fc_lesb)
+{
+ struct net_device *netdev = fcoe_get_netdev(lport);
+
+ __fcoe_get_lesb(lport, fc_lesb, netdev);
+}
+EXPORT_SYMBOL_GPL(fcoe_get_lesb);
+
+/**
+ * fcoe_ctlr_get_lesb() - Get the Link Error Status Block (LESB) for a given
+ * fcoe controller device
+ * @ctlr_dev: The given fcoe controller device
+ *
+ */
+void fcoe_ctlr_get_lesb(struct fcoe_ctlr_device *ctlr_dev)
+{
+ struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr_dev);
+ struct net_device *netdev = fcoe_get_netdev(fip->lp);
+ struct fc_els_lesb *fc_lesb;
+
+ fc_lesb = (struct fc_els_lesb *)(&ctlr_dev->lesb);
+ __fcoe_get_lesb(fip->lp, fc_lesb, netdev);
+}
+EXPORT_SYMBOL_GPL(fcoe_ctlr_get_lesb);
+
+void fcoe_wwn_to_str(u64 wwn, char *buf, int len)
+{
+ u8 wwpn[8];
+
+ u64_to_wwn(wwn, wwpn);
+ snprintf(buf, len, "%02x%02x%02x%02x%02x%02x%02x%02x",
+ wwpn[0], wwpn[1], wwpn[2], wwpn[3],
+ wwpn[4], wwpn[5], wwpn[6], wwpn[7]);
+}
+EXPORT_SYMBOL_GPL(fcoe_wwn_to_str);
+
+/**
+ * fcoe_validate_vport_create() - Validate a vport before creating it
+ * @vport: NPIV port to be created
+ *
+ * This routine is meant to add validation for a vport before creating it
+ * via fcoe_vport_create().
+ * Current validations are:
+ * - WWPN supplied is unique for given lport
+ */
+int fcoe_validate_vport_create(struct fc_vport *vport)
+{
+ struct Scsi_Host *shost = vport_to_shost(vport);
+ struct fc_lport *n_port = shost_priv(shost);
+ struct fc_lport *vn_port;
+ int rc = 0;
+ char buf[32];
+
+ mutex_lock(&n_port->lp_mutex);
+
+ fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
+ /* Check if the wwpn is not same as that of the lport */
+ if (!memcmp(&n_port->wwpn, &vport->port_name, sizeof(u64))) {
+ LIBFCOE_TRANSPORT_DBG("vport WWPN 0x%s is same as that of the "
+ "base port WWPN\n", buf);
+ rc = -EINVAL;
+ goto out;
+ }
+
+ /* Check if there is any existing vport with same wwpn */
+ list_for_each_entry(vn_port, &n_port->vports, list) {
+ if (!memcmp(&vn_port->wwpn, &vport->port_name, sizeof(u64))) {
+ LIBFCOE_TRANSPORT_DBG("vport with given WWPN 0x%s "
+ "already exists\n", buf);
+ rc = -EINVAL;
+ break;
+ }
+ }
+out:
+ mutex_unlock(&n_port->lp_mutex);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(fcoe_validate_vport_create);
+
+/**
+ * fcoe_get_wwn() - Get the world wide name from LLD if it supports it
+ * @netdev: the associated net device
+ * @wwn: the output WWN
+ * @type: the type of WWN (WWPN or WWNN)
+ *
+ * Returns: 0 for success
+ */
+int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
+{
+ const struct net_device_ops *ops = netdev->netdev_ops;
+
+ if (ops->ndo_fcoe_get_wwn)
+ return ops->ndo_fcoe_get_wwn(netdev, wwn, type);
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(fcoe_get_wwn);
+
+/**
+ * fcoe_fc_crc() - Calculates the CRC for a given frame
+ * @fp: The frame to be checksumed
+ *
+ * This uses crc32() routine to calculate the CRC for a frame
+ *
+ * Return: The 32 bit CRC value
+ */
+u32 fcoe_fc_crc(struct fc_frame *fp)
+{
+ struct sk_buff *skb = fp_skb(fp);
+ struct skb_frag_struct *frag;
+ unsigned char *data;
+ unsigned long off, len, clen;
+ u32 crc;
+ unsigned i;
+
+ crc = crc32(~0, skb->data, skb_headlen(skb));
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ frag = &skb_shinfo(skb)->frags[i];
+ off = frag->page_offset;
+ len = skb_frag_size(frag);
+ while (len > 0) {
+ clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK));
+ data = kmap_atomic(
+ skb_frag_page(frag) + (off >> PAGE_SHIFT));
+ crc = crc32(crc, data + (off & ~PAGE_MASK), clen);
+ kunmap_atomic(data);
+ off += clen;
+ len -= clen;
+ }
+ }
+ return crc;
+}
+EXPORT_SYMBOL_GPL(fcoe_fc_crc);
+
+/**
+ * fcoe_start_io() - Start FCoE I/O
+ * @skb: The packet to be transmitted
+ *
+ * This routine is called from the net device to start transmitting
+ * FCoE packets.
+ *
+ * Returns: 0 for success
+ */
+int fcoe_start_io(struct sk_buff *skb)
+{
+ struct sk_buff *nskb;
+ int rc;
+
+ nskb = skb_clone(skb, GFP_ATOMIC);
+ if (!nskb)
+ return -ENOMEM;
+ rc = dev_queue_xmit(nskb);
+ if (rc != 0)
+ return rc;
+ kfree_skb(skb);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fcoe_start_io);
+
+
+/**
+ * fcoe_clean_pending_queue() - Dequeue a skb and free it
+ * @lport: The local port to dequeue a skb on
+ */
+void fcoe_clean_pending_queue(struct fc_lport *lport)
+{
+ struct fcoe_port *port = lport_priv(lport);
+ struct sk_buff *skb;
+
+ spin_lock_bh(&port->fcoe_pending_queue.lock);
+ while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) {
+ spin_unlock_bh(&port->fcoe_pending_queue.lock);
+ kfree_skb(skb);
+ spin_lock_bh(&port->fcoe_pending_queue.lock);
+ }
+ spin_unlock_bh(&port->fcoe_pending_queue.lock);
+}
+EXPORT_SYMBOL_GPL(fcoe_clean_pending_queue);
+
+/**
+ * fcoe_check_wait_queue() - Attempt to clear the transmit backlog
+ * @lport: The local port whose backlog is to be cleared
+ *
+ * This empties the wait_queue, dequeues the head of the wait_queue queue
+ * and calls fcoe_start_io() for each packet. If all skb have been
+ * transmitted it returns the qlen. If an error occurs it restores
+ * wait_queue (to try again later) and returns -1.
+ *
+ * The wait_queue is used when the skb transmit fails. The failed skb
+ * will go in the wait_queue which will be emptied by the timer function or
+ * by the next skb transmit.
+ */
+void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb)
+{
+ struct fcoe_port *port = lport_priv(lport);
+ int rc;
+
+ spin_lock_bh(&port->fcoe_pending_queue.lock);
+
+ if (skb)
+ __skb_queue_tail(&port->fcoe_pending_queue, skb);
+
+ if (port->fcoe_pending_queue_active)
+ goto out;
+ port->fcoe_pending_queue_active = 1;
+
+ while (port->fcoe_pending_queue.qlen) {
+ /* keep qlen > 0 until fcoe_start_io succeeds */
+ port->fcoe_pending_queue.qlen++;
+ skb = __skb_dequeue(&port->fcoe_pending_queue);
+
+ spin_unlock_bh(&port->fcoe_pending_queue.lock);
+ rc = fcoe_start_io(skb);
+ spin_lock_bh(&port->fcoe_pending_queue.lock);
+
+ if (rc) {
+ __skb_queue_head(&port->fcoe_pending_queue, skb);
+ /* undo temporary increment above */
+ port->fcoe_pending_queue.qlen--;
+ break;
+ }
+ /* undo temporary increment above */
+ port->fcoe_pending_queue.qlen--;
+ }
+
+ if (port->fcoe_pending_queue.qlen < port->min_queue_depth)
+ lport->qfull = 0;
+ if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer))
+ mod_timer(&port->timer, jiffies + 2);
+ port->fcoe_pending_queue_active = 0;
+out:
+ if (port->fcoe_pending_queue.qlen > port->max_queue_depth)
+ lport->qfull = 1;
+ spin_unlock_bh(&port->fcoe_pending_queue.lock);
+}
+EXPORT_SYMBOL_GPL(fcoe_check_wait_queue);
+
+/**
+ * fcoe_queue_timer() - The fcoe queue timer
+ * @lport: The local port
+ *
+ * Calls fcoe_check_wait_queue on timeout
+ */
+void fcoe_queue_timer(struct timer_list *t)
+{
+ struct fcoe_port *port = from_timer(port, t, timer);
+
+ fcoe_check_wait_queue(port->lport, NULL);
+}
+EXPORT_SYMBOL_GPL(fcoe_queue_timer);
+
+/**
+ * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC
+ * @skb: The packet to be transmitted
+ * @tlen: The total length of the trailer
+ * @fps: The fcoe context
+ *
+ * This routine allocates a page for frame trailers. The page is re-used if
+ * there is enough room left on it for the current trailer. If there isn't
+ * enough buffer left a new page is allocated for the trailer. Reference to
+ * the page from this function as well as the skbs using the page fragments
+ * ensure that the page is freed at the appropriate time.
+ *
+ * Returns: 0 for success
+ */
+int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen,
+ struct fcoe_percpu_s *fps)
+{
+ struct page *page;
+
+ page = fps->crc_eof_page;
+ if (!page) {
+ page = alloc_page(GFP_ATOMIC);
+ if (!page)
+ return -ENOMEM;
+
+ fps->crc_eof_page = page;
+ fps->crc_eof_offset = 0;
+ }
+
+ get_page(page);
+ skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page,
+ fps->crc_eof_offset, tlen);
+ skb->len += tlen;
+ skb->data_len += tlen;
+ skb->truesize += tlen;
+ fps->crc_eof_offset += sizeof(struct fcoe_crc_eof);
+
+ if (fps->crc_eof_offset >= PAGE_SIZE) {
+ fps->crc_eof_page = NULL;
+ fps->crc_eof_offset = 0;
+ put_page(page);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fcoe_get_paged_crc_eof);
+
+/**
+ * fcoe_transport_lookup - find an fcoe transport that matches a netdev
+ * @netdev: The netdev to look for from all attached transports
+ *
+ * Returns : ptr to the fcoe transport that supports this netdev or NULL
+ * if not found.
+ *
+ * The ft_mutex should be held when this is called
+ */
+static struct fcoe_transport *fcoe_transport_lookup(struct net_device *netdev)
+{
+ struct fcoe_transport *ft = NULL;
+
+ list_for_each_entry(ft, &fcoe_transports, list)
+ if (ft->match && ft->match(netdev))
+ return ft;
+ return NULL;
+}
+
+/**
+ * fcoe_transport_attach - Attaches an FCoE transport
+ * @ft: The fcoe transport to be attached
+ *
+ * Returns : 0 for success
+ */
+int fcoe_transport_attach(struct fcoe_transport *ft)
+{
+ int rc = 0;
+
+ mutex_lock(&ft_mutex);
+ if (ft->attached) {
+ LIBFCOE_TRANSPORT_DBG("transport %s already attached\n",
+ ft->name);
+ rc = -EEXIST;
+ goto out_attach;
+ }
+
+ /* Add default transport to the tail */
+ if (strcmp(ft->name, FCOE_TRANSPORT_DEFAULT))
+ list_add(&ft->list, &fcoe_transports);
+ else
+ list_add_tail(&ft->list, &fcoe_transports);
+
+ ft->attached = true;
+ LIBFCOE_TRANSPORT_DBG("attaching transport %s\n", ft->name);
+
+out_attach:
+ mutex_unlock(&ft_mutex);
+ return rc;
+}
+EXPORT_SYMBOL(fcoe_transport_attach);
+
+/**
+ * fcoe_transport_detach - Detaches an FCoE transport
+ * @ft: The fcoe transport to be attached
+ *
+ * Returns : 0 for success
+ */
+int fcoe_transport_detach(struct fcoe_transport *ft)
+{
+ int rc = 0;
+ struct fcoe_netdev_mapping *nm = NULL, *tmp;
+
+ mutex_lock(&ft_mutex);
+ if (!ft->attached) {
+ LIBFCOE_TRANSPORT_DBG("transport %s already detached\n",
+ ft->name);
+ rc = -ENODEV;
+ goto out_attach;
+ }
+
+ /* remove netdev mapping for this transport as it is going away */
+ mutex_lock(&fn_mutex);
+ list_for_each_entry_safe(nm, tmp, &fcoe_netdevs, list) {
+ if (nm->ft == ft) {
+ LIBFCOE_TRANSPORT_DBG("transport %s going away, "
+ "remove its netdev mapping for %s\n",
+ ft->name, nm->netdev->name);
+ list_del(&nm->list);
+ kfree(nm);
+ }
+ }
+ mutex_unlock(&fn_mutex);
+
+ list_del(&ft->list);
+ ft->attached = false;
+ LIBFCOE_TRANSPORT_DBG("detaching transport %s\n", ft->name);
+
+out_attach:
+ mutex_unlock(&ft_mutex);
+ return rc;
+
+}
+EXPORT_SYMBOL(fcoe_transport_detach);
+
+static int fcoe_transport_show(char *buffer, const struct kernel_param *kp)
+{
+ int i, j;
+ struct fcoe_transport *ft = NULL;
+
+ i = j = sprintf(buffer, "Attached FCoE transports:");
+ mutex_lock(&ft_mutex);
+ list_for_each_entry(ft, &fcoe_transports, list) {
+ if (i >= PAGE_SIZE - IFNAMSIZ)
+ break;
+ i += snprintf(&buffer[i], IFNAMSIZ, "%s ", ft->name);
+ }
+ mutex_unlock(&ft_mutex);
+ if (i == j)
+ i += snprintf(&buffer[i], IFNAMSIZ, "none");
+ return i;
+}
+
+static int __init fcoe_transport_init(void)
+{
+ register_netdevice_notifier(&libfcoe_notifier);
+ return 0;
+}
+
+static int fcoe_transport_exit(void)
+{
+ struct fcoe_transport *ft;
+
+ unregister_netdevice_notifier(&libfcoe_notifier);
+ mutex_lock(&ft_mutex);
+ list_for_each_entry(ft, &fcoe_transports, list)
+ printk(KERN_ERR "FCoE transport %s is still attached!\n",
+ ft->name);
+ mutex_unlock(&ft_mutex);
+ return 0;
+}
+
+
+static int fcoe_add_netdev_mapping(struct net_device *netdev,
+ struct fcoe_transport *ft)
+{
+ struct fcoe_netdev_mapping *nm;
+
+ nm = kmalloc(sizeof(*nm), GFP_KERNEL);
+ if (!nm) {
+ printk(KERN_ERR "Unable to allocate netdev_mapping");
+ return -ENOMEM;
+ }
+
+ nm->netdev = netdev;
+ nm->ft = ft;
+
+ mutex_lock(&fn_mutex);
+ list_add(&nm->list, &fcoe_netdevs);
+ mutex_unlock(&fn_mutex);
+ return 0;
+}
+
+
+static void fcoe_del_netdev_mapping(struct net_device *netdev)
+{
+ struct fcoe_netdev_mapping *nm = NULL, *tmp;
+
+ mutex_lock(&fn_mutex);
+ list_for_each_entry_safe(nm, tmp, &fcoe_netdevs, list) {
+ if (nm->netdev == netdev) {
+ list_del(&nm->list);
+ kfree(nm);
+ mutex_unlock(&fn_mutex);
+ return;
+ }
+ }
+ mutex_unlock(&fn_mutex);
+}
+
+
+/**
+ * fcoe_netdev_map_lookup - find the fcoe transport that matches the netdev on which
+ * it was created
+ *
+ * Returns : ptr to the fcoe transport that supports this netdev or NULL
+ * if not found.
+ *
+ * The ft_mutex should be held when this is called
+ */
+static struct fcoe_transport *fcoe_netdev_map_lookup(struct net_device *netdev)
+{
+ struct fcoe_transport *ft = NULL;
+ struct fcoe_netdev_mapping *nm;
+
+ mutex_lock(&fn_mutex);
+ list_for_each_entry(nm, &fcoe_netdevs, list) {
+ if (netdev == nm->netdev) {
+ ft = nm->ft;
+ mutex_unlock(&fn_mutex);
+ return ft;
+ }
+ }
+
+ mutex_unlock(&fn_mutex);
+ return NULL;
+}
+
+/**
+ * fcoe_if_to_netdev() - Parse a name buffer to get a net device
+ * @buffer: The name of the net device
+ *
+ * Returns: NULL or a ptr to net_device
+ */
+static struct net_device *fcoe_if_to_netdev(const char *buffer)
+{
+ char *cp;
+ char ifname[IFNAMSIZ + 2];
+
+ if (buffer) {
+ strlcpy(ifname, buffer, IFNAMSIZ);
+ cp = ifname + strlen(ifname);
+ while (--cp >= ifname && *cp == '\n')
+ *cp = '\0';
+ return dev_get_by_name(&init_net, ifname);
+ }
+ return NULL;
+}
+
+/**
+ * libfcoe_device_notification() - Handler for net device events
+ * @notifier: The context of the notification
+ * @event: The type of event
+ * @ptr: The net device that the event was on
+ *
+ * This function is called by the Ethernet driver in case of link change event.
+ *
+ * Returns: 0 for success
+ */
+static int libfcoe_device_notification(struct notifier_block *notifier,
+ ulong event, void *ptr)
+{
+ struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
+
+ switch (event) {
+ case NETDEV_UNREGISTER:
+ LIBFCOE_TRANSPORT_DBG("NETDEV_UNREGISTER %s\n",
+ netdev->name);
+ fcoe_del_netdev_mapping(netdev);
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+ssize_t fcoe_ctlr_create_store(struct bus_type *bus,
+ const char *buf, size_t count)
+{
+ struct net_device *netdev = NULL;
+ struct fcoe_transport *ft = NULL;
+ int rc = 0;
+ int err;
+
+ mutex_lock(&ft_mutex);
+
+ netdev = fcoe_if_to_netdev(buf);
+ if (!netdev) {
+ LIBFCOE_TRANSPORT_DBG("Invalid device %s.\n", buf);
+ rc = -ENODEV;
+ goto out_nodev;
+ }
+
+ ft = fcoe_netdev_map_lookup(netdev);
+ if (ft) {
+ LIBFCOE_TRANSPORT_DBG("transport %s already has existing "
+ "FCoE instance on %s.\n",
+ ft->name, netdev->name);
+ rc = -EEXIST;
+ goto out_putdev;
+ }
+
+ ft = fcoe_transport_lookup(netdev);
+ if (!ft) {
+ LIBFCOE_TRANSPORT_DBG("no FCoE transport found for %s.\n",
+ netdev->name);
+ rc = -ENODEV;
+ goto out_putdev;
+ }
+
+ /* pass to transport create */
+ err = ft->alloc ? ft->alloc(netdev) : -ENODEV;
+ if (err) {
+ fcoe_del_netdev_mapping(netdev);
+ rc = -ENOMEM;
+ goto out_putdev;
+ }
+
+ err = fcoe_add_netdev_mapping(netdev, ft);
+ if (err) {
+ LIBFCOE_TRANSPORT_DBG("failed to add new netdev mapping "
+ "for FCoE transport %s for %s.\n",
+ ft->name, netdev->name);
+ rc = -ENODEV;
+ goto out_putdev;
+ }
+
+ LIBFCOE_TRANSPORT_DBG("transport %s succeeded to create fcoe on %s.\n",
+ ft->name, netdev->name);
+
+out_putdev:
+ dev_put(netdev);
+out_nodev:
+ mutex_unlock(&ft_mutex);
+ if (rc)
+ return rc;
+ return count;
+}
+
+ssize_t fcoe_ctlr_destroy_store(struct bus_type *bus,
+ const char *buf, size_t count)
+{
+ int rc = -ENODEV;
+ struct net_device *netdev = NULL;
+ struct fcoe_transport *ft = NULL;
+
+ mutex_lock(&ft_mutex);
+
+ netdev = fcoe_if_to_netdev(buf);
+ if (!netdev) {
+ LIBFCOE_TRANSPORT_DBG("invalid device %s.\n", buf);
+ goto out_nodev;
+ }
+
+ ft = fcoe_netdev_map_lookup(netdev);
+ if (!ft) {
+ LIBFCOE_TRANSPORT_DBG("no FCoE transport found for %s.\n",
+ netdev->name);
+ goto out_putdev;
+ }
+
+ /* pass to transport destroy */
+ rc = ft->destroy(netdev);
+ if (rc)
+ goto out_putdev;
+
+ fcoe_del_netdev_mapping(netdev);
+ LIBFCOE_TRANSPORT_DBG("transport %s %s to destroy fcoe on %s.\n",
+ ft->name, (rc) ? "failed" : "succeeded",
+ netdev->name);
+ rc = count; /* required for successful return */
+out_putdev:
+ dev_put(netdev);
+out_nodev:
+ mutex_unlock(&ft_mutex);
+ return rc;
+}
+EXPORT_SYMBOL(fcoe_ctlr_destroy_store);
+
+/**
+ * fcoe_transport_create() - Create a fcoe interface
+ * @buffer: The name of the Ethernet interface to create on
+ * @kp: The associated kernel param
+ *
+ * Called from sysfs. This holds the ft_mutex while calling the
+ * registered fcoe transport's create function.
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_transport_create(const char *buffer,
+ const struct kernel_param *kp)
+{
+ int rc = -ENODEV;
+ struct net_device *netdev = NULL;
+ struct fcoe_transport *ft = NULL;
+ enum fip_state fip_mode = (enum fip_state)(long)kp->arg;
+
+ mutex_lock(&ft_mutex);
+
+ netdev = fcoe_if_to_netdev(buffer);
+ if (!netdev) {
+ LIBFCOE_TRANSPORT_DBG("Invalid device %s.\n", buffer);
+ goto out_nodev;
+ }
+
+ ft = fcoe_netdev_map_lookup(netdev);
+ if (ft) {
+ LIBFCOE_TRANSPORT_DBG("transport %s already has existing "
+ "FCoE instance on %s.\n",
+ ft->name, netdev->name);
+ rc = -EEXIST;
+ goto out_putdev;
+ }
+
+ ft = fcoe_transport_lookup(netdev);
+ if (!ft) {
+ LIBFCOE_TRANSPORT_DBG("no FCoE transport found for %s.\n",
+ netdev->name);
+ goto out_putdev;
+ }
+
+ rc = fcoe_add_netdev_mapping(netdev, ft);
+ if (rc) {
+ LIBFCOE_TRANSPORT_DBG("failed to add new netdev mapping "
+ "for FCoE transport %s for %s.\n",
+ ft->name, netdev->name);
+ goto out_putdev;
+ }
+
+ /* pass to transport create */
+ rc = ft->create ? ft->create(netdev, fip_mode) : -ENODEV;
+ if (rc)
+ fcoe_del_netdev_mapping(netdev);
+
+ LIBFCOE_TRANSPORT_DBG("transport %s %s to create fcoe on %s.\n",
+ ft->name, (rc) ? "failed" : "succeeded",
+ netdev->name);
+
+out_putdev:
+ dev_put(netdev);
+out_nodev:
+ mutex_unlock(&ft_mutex);
+ return rc;
+}
+
+/**
+ * fcoe_transport_destroy() - Destroy a FCoE interface
+ * @buffer: The name of the Ethernet interface to be destroyed
+ * @kp: The associated kernel parameter
+ *
+ * Called from sysfs. This holds the ft_mutex while calling the
+ * registered fcoe transport's destroy function.
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_transport_destroy(const char *buffer,
+ const struct kernel_param *kp)
+{
+ int rc = -ENODEV;
+ struct net_device *netdev = NULL;
+ struct fcoe_transport *ft = NULL;
+
+ mutex_lock(&ft_mutex);
+
+ netdev = fcoe_if_to_netdev(buffer);
+ if (!netdev) {
+ LIBFCOE_TRANSPORT_DBG("invalid device %s.\n", buffer);
+ goto out_nodev;
+ }
+
+ ft = fcoe_netdev_map_lookup(netdev);
+ if (!ft) {
+ LIBFCOE_TRANSPORT_DBG("no FCoE transport found for %s.\n",
+ netdev->name);
+ goto out_putdev;
+ }
+
+ /* pass to transport destroy */
+ rc = ft->destroy ? ft->destroy(netdev) : -ENODEV;
+ fcoe_del_netdev_mapping(netdev);
+ LIBFCOE_TRANSPORT_DBG("transport %s %s to destroy fcoe on %s.\n",
+ ft->name, (rc) ? "failed" : "succeeded",
+ netdev->name);
+
+out_putdev:
+ dev_put(netdev);
+out_nodev:
+ mutex_unlock(&ft_mutex);
+ return rc;
+}
+
+/**
+ * fcoe_transport_disable() - Disables a FCoE interface
+ * @buffer: The name of the Ethernet interface to be disabled
+ * @kp: The associated kernel parameter
+ *
+ * Called from sysfs.
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_transport_disable(const char *buffer,
+ const struct kernel_param *kp)
+{
+ int rc = -ENODEV;
+ struct net_device *netdev = NULL;
+ struct fcoe_transport *ft = NULL;
+
+ mutex_lock(&ft_mutex);
+
+ netdev = fcoe_if_to_netdev(buffer);
+ if (!netdev)
+ goto out_nodev;
+
+ ft = fcoe_netdev_map_lookup(netdev);
+ if (!ft)
+ goto out_putdev;
+
+ rc = ft->disable ? ft->disable(netdev) : -ENODEV;
+
+out_putdev:
+ dev_put(netdev);
+out_nodev:
+ mutex_unlock(&ft_mutex);
+ return rc;
+}
+
+/**
+ * fcoe_transport_enable() - Enables a FCoE interface
+ * @buffer: The name of the Ethernet interface to be enabled
+ * @kp: The associated kernel parameter
+ *
+ * Called from sysfs.
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_transport_enable(const char *buffer,
+ const struct kernel_param *kp)
+{
+ int rc = -ENODEV;
+ struct net_device *netdev = NULL;
+ struct fcoe_transport *ft = NULL;
+
+ mutex_lock(&ft_mutex);
+
+ netdev = fcoe_if_to_netdev(buffer);
+ if (!netdev)
+ goto out_nodev;
+
+ ft = fcoe_netdev_map_lookup(netdev);
+ if (!ft)
+ goto out_putdev;
+
+ rc = ft->enable ? ft->enable(netdev) : -ENODEV;
+
+out_putdev:
+ dev_put(netdev);
+out_nodev:
+ mutex_unlock(&ft_mutex);
+ return rc;
+}
+
+/**
+ * libfcoe_init() - Initialization routine for libfcoe.ko
+ */
+static int __init libfcoe_init(void)
+{
+ int rc = 0;
+
+ rc = fcoe_transport_init();
+ if (rc)
+ return rc;
+
+ rc = fcoe_sysfs_setup();
+ if (rc)
+ fcoe_transport_exit();
+
+ return rc;
+}
+module_init(libfcoe_init);
+
+/**
+ * libfcoe_exit() - Tear down libfcoe.ko
+ */
+static void __exit libfcoe_exit(void)
+{
+ fcoe_sysfs_teardown();
+ fcoe_transport_exit();
+}
+module_exit(libfcoe_exit);
diff --git a/drivers/scsi/fcoe/libfcoe.h b/drivers/scsi/fcoe/libfcoe.h
new file mode 100644
index 0000000..b8bdfab
--- /dev/null
+++ b/drivers/scsi/fcoe/libfcoe.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _FCOE_LIBFCOE_H_
+#define _FCOE_LIBFCOE_H_
+
+extern unsigned int libfcoe_debug_logging;
+#define LIBFCOE_LOGGING 0x01 /* General logging, not categorized */
+#define LIBFCOE_FIP_LOGGING 0x02 /* FIP logging */
+#define LIBFCOE_TRANSPORT_LOGGING 0x04 /* FCoE transport logging */
+#define LIBFCOE_SYSFS_LOGGING 0x08 /* fcoe_sysfs logging */
+
+#define LIBFCOE_CHECK_LOGGING(LEVEL, CMD) \
+do { \
+ if (unlikely(libfcoe_debug_logging & LEVEL)) \
+ do { \
+ CMD; \
+ } while (0); \
+} while (0)
+
+#define LIBFCOE_DBG(fmt, args...) \
+ LIBFCOE_CHECK_LOGGING(LIBFCOE_LOGGING, \
+ pr_info("libfcoe: " fmt, ##args);)
+
+#define LIBFCOE_FIP_DBG(fip, fmt, args...) \
+ LIBFCOE_CHECK_LOGGING(LIBFCOE_FIP_LOGGING, \
+ pr_info("host%d: fip: " fmt, \
+ (fip)->lp->host->host_no, ##args);)
+
+#define LIBFCOE_TRANSPORT_DBG(fmt, args...) \
+ LIBFCOE_CHECK_LOGGING(LIBFCOE_TRANSPORT_LOGGING, \
+ pr_info("%s: " fmt, __func__, ##args);)
+
+#define LIBFCOE_SYSFS_DBG(cdev, fmt, args...) \
+ LIBFCOE_CHECK_LOGGING(LIBFCOE_SYSFS_LOGGING, \
+ pr_info("ctlr_%d: " fmt, cdev->id, ##args);)
+
+#endif /* _FCOE_LIBFCOE_H_ */