v4.19.13 snapshot.
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c
new file mode 100644
index 0000000..645c160
--- /dev/null
+++ b/net/tipc/bearer.c
@@ -0,0 +1,1206 @@
+/*
+ * net/tipc/bearer.c: TIPC bearer code
+ *
+ * Copyright (c) 1996-2006, 2013-2016, Ericsson AB
+ * Copyright (c) 2004-2006, 2010-2013, Wind River Systems
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the names of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <net/sock.h>
+#include "core.h"
+#include "bearer.h"
+#include "link.h"
+#include "discover.h"
+#include "monitor.h"
+#include "bcast.h"
+#include "netlink.h"
+#include "udp_media.h"
+
+#define MAX_ADDR_STR 60
+
+static struct tipc_media * const media_info_array[] = {
+ ð_media_info,
+#ifdef CONFIG_TIPC_MEDIA_IB
+ &ib_media_info,
+#endif
+#ifdef CONFIG_TIPC_MEDIA_UDP
+ &udp_media_info,
+#endif
+ NULL
+};
+
+static struct tipc_bearer *bearer_get(struct net *net, int bearer_id)
+{
+ struct tipc_net *tn = tipc_net(net);
+
+ return rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
+}
+
+static void bearer_disable(struct net *net, struct tipc_bearer *b);
+static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *pt, struct net_device *orig_dev);
+
+/**
+ * tipc_media_find - locates specified media object by name
+ */
+struct tipc_media *tipc_media_find(const char *name)
+{
+ u32 i;
+
+ for (i = 0; media_info_array[i] != NULL; i++) {
+ if (!strcmp(media_info_array[i]->name, name))
+ break;
+ }
+ return media_info_array[i];
+}
+
+/**
+ * media_find_id - locates specified media object by type identifier
+ */
+static struct tipc_media *media_find_id(u8 type)
+{
+ u32 i;
+
+ for (i = 0; media_info_array[i] != NULL; i++) {
+ if (media_info_array[i]->type_id == type)
+ break;
+ }
+ return media_info_array[i];
+}
+
+/**
+ * tipc_media_addr_printf - record media address in print buffer
+ */
+void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
+{
+ char addr_str[MAX_ADDR_STR];
+ struct tipc_media *m;
+ int ret;
+
+ m = media_find_id(a->media_id);
+
+ if (m && !m->addr2str(a, addr_str, sizeof(addr_str)))
+ ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str);
+ else {
+ u32 i;
+
+ ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id);
+ for (i = 0; i < sizeof(a->value); i++)
+ ret += scnprintf(buf - ret, len + ret,
+ "-%02x", a->value[i]);
+ }
+}
+
+/**
+ * bearer_name_validate - validate & (optionally) deconstruct bearer name
+ * @name: ptr to bearer name string
+ * @name_parts: ptr to area for bearer name components (or NULL if not needed)
+ *
+ * Returns 1 if bearer name is valid, otherwise 0.
+ */
+static int bearer_name_validate(const char *name,
+ struct tipc_bearer_names *name_parts)
+{
+ char name_copy[TIPC_MAX_BEARER_NAME];
+ char *media_name;
+ char *if_name;
+ u32 media_len;
+ u32 if_len;
+
+ /* copy bearer name & ensure length is OK */
+ name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
+ /* need above in case non-Posix strncpy() doesn't pad with nulls */
+ strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
+ if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
+ return 0;
+
+ /* ensure all component parts of bearer name are present */
+ media_name = name_copy;
+ if_name = strchr(media_name, ':');
+ if (if_name == NULL)
+ return 0;
+ *(if_name++) = 0;
+ media_len = if_name - media_name;
+ if_len = strlen(if_name) + 1;
+
+ /* validate component parts of bearer name */
+ if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
+ (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
+ return 0;
+
+ /* return bearer name components, if necessary */
+ if (name_parts) {
+ strcpy(name_parts->media_name, media_name);
+ strcpy(name_parts->if_name, if_name);
+ }
+ return 1;
+}
+
+/**
+ * tipc_bearer_find - locates bearer object with matching bearer name
+ */
+struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
+{
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
+ struct tipc_bearer *b;
+ u32 i;
+
+ for (i = 0; i < MAX_BEARERS; i++) {
+ b = rtnl_dereference(tn->bearer_list[i]);
+ if (b && (!strcmp(b->name, name)))
+ return b;
+ }
+ return NULL;
+}
+
+/* tipc_bearer_get_name - get the bearer name from its id.
+ * @net: network namespace
+ * @name: a pointer to the buffer where the name will be stored.
+ * @bearer_id: the id to get the name from.
+ */
+int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id)
+{
+ struct tipc_net *tn = tipc_net(net);
+ struct tipc_bearer *b;
+
+ if (bearer_id >= MAX_BEARERS)
+ return -EINVAL;
+
+ b = rtnl_dereference(tn->bearer_list[bearer_id]);
+ if (!b)
+ return -EINVAL;
+
+ strcpy(name, b->name);
+ return 0;
+}
+
+void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
+{
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
+ struct tipc_bearer *b;
+
+ rcu_read_lock();
+ b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
+ if (b)
+ tipc_disc_add_dest(b->disc);
+ rcu_read_unlock();
+}
+
+void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
+{
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
+ struct tipc_bearer *b;
+
+ rcu_read_lock();
+ b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
+ if (b)
+ tipc_disc_remove_dest(b->disc);
+ rcu_read_unlock();
+}
+
+/**
+ * tipc_enable_bearer - enable bearer with the given name
+ */
+static int tipc_enable_bearer(struct net *net, const char *name,
+ u32 disc_domain, u32 prio,
+ struct nlattr *attr[])
+{
+ struct tipc_net *tn = tipc_net(net);
+ struct tipc_bearer_names b_names;
+ int with_this_prio = 1;
+ struct tipc_bearer *b;
+ struct tipc_media *m;
+ struct sk_buff *skb;
+ int bearer_id = 0;
+ int res = -EINVAL;
+ char *errstr = "";
+
+ if (!bearer_name_validate(name, &b_names)) {
+ errstr = "illegal name";
+ goto rejected;
+ }
+
+ if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) {
+ errstr = "illegal priority";
+ goto rejected;
+ }
+
+ m = tipc_media_find(b_names.media_name);
+ if (!m) {
+ errstr = "media not registered";
+ goto rejected;
+ }
+
+ if (prio == TIPC_MEDIA_LINK_PRI)
+ prio = m->priority;
+
+ /* Check new bearer vs existing ones and find free bearer id if any */
+ while (bearer_id < MAX_BEARERS) {
+ b = rtnl_dereference(tn->bearer_list[bearer_id]);
+ if (!b)
+ break;
+ if (!strcmp(name, b->name)) {
+ errstr = "already enabled";
+ goto rejected;
+ }
+ bearer_id++;
+ if (b->priority != prio)
+ continue;
+ if (++with_this_prio <= 2)
+ continue;
+ pr_warn("Bearer <%s>: already 2 bearers with priority %u\n",
+ name, prio);
+ if (prio == TIPC_MIN_LINK_PRI) {
+ errstr = "cannot adjust to lower";
+ goto rejected;
+ }
+ pr_warn("Bearer <%s>: trying with adjusted priority\n", name);
+ prio--;
+ bearer_id = 0;
+ with_this_prio = 1;
+ }
+
+ if (bearer_id >= MAX_BEARERS) {
+ errstr = "max 3 bearers permitted";
+ goto rejected;
+ }
+
+ b = kzalloc(sizeof(*b), GFP_ATOMIC);
+ if (!b)
+ return -ENOMEM;
+
+ strcpy(b->name, name);
+ b->media = m;
+ res = m->enable_media(net, b, attr);
+ if (res) {
+ kfree(b);
+ errstr = "failed to enable media";
+ goto rejected;
+ }
+
+ b->identity = bearer_id;
+ b->tolerance = m->tolerance;
+ b->window = m->window;
+ b->domain = disc_domain;
+ b->net_plane = bearer_id + 'A';
+ b->priority = prio;
+ test_and_set_bit_lock(0, &b->up);
+
+ res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
+ if (res) {
+ bearer_disable(net, b);
+ kfree(b);
+ errstr = "failed to create discoverer";
+ goto rejected;
+ }
+
+ rcu_assign_pointer(tn->bearer_list[bearer_id], b);
+ if (skb)
+ tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
+
+ if (tipc_mon_create(net, bearer_id)) {
+ bearer_disable(net, b);
+ return -ENOMEM;
+ }
+
+ pr_info("Enabled bearer <%s>, priority %u\n", name, prio);
+
+ return res;
+rejected:
+ pr_warn("Enabling of bearer <%s> rejected, %s\n", name, errstr);
+ return res;
+}
+
+/**
+ * tipc_reset_bearer - Reset all links established over this bearer
+ */
+static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
+{
+ pr_info("Resetting bearer <%s>\n", b->name);
+ tipc_node_delete_links(net, b->identity);
+ tipc_disc_reset(net, b);
+ return 0;
+}
+
+/**
+ * bearer_disable
+ *
+ * Note: This routine assumes caller holds RTNL lock.
+ */
+static void bearer_disable(struct net *net, struct tipc_bearer *b)
+{
+ struct tipc_net *tn = tipc_net(net);
+ int bearer_id = b->identity;
+
+ pr_info("Disabling bearer <%s>\n", b->name);
+ clear_bit_unlock(0, &b->up);
+ tipc_node_delete_links(net, bearer_id);
+ b->media->disable_media(b);
+ RCU_INIT_POINTER(b->media_ptr, NULL);
+ if (b->disc)
+ tipc_disc_delete(b->disc);
+ RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
+ kfree_rcu(b, rcu);
+ tipc_mon_delete(net, bearer_id);
+}
+
+int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
+ struct nlattr *attr[])
+{
+ char *dev_name = strchr((const char *)b->name, ':') + 1;
+ int hwaddr_len = b->media->hwaddr_len;
+ u8 node_id[NODE_ID_LEN] = {0,};
+ struct net_device *dev;
+
+ /* Find device with specified name */
+ dev = dev_get_by_name(net, dev_name);
+ if (!dev)
+ return -ENODEV;
+ if (tipc_mtu_bad(dev, 0)) {
+ dev_put(dev);
+ return -EINVAL;
+ }
+
+ /* Autoconfigure own node identity if needed */
+ if (!tipc_own_id(net) && hwaddr_len <= NODE_ID_LEN) {
+ memcpy(node_id, dev->dev_addr, hwaddr_len);
+ tipc_net_init(net, node_id, 0);
+ }
+ if (!tipc_own_id(net)) {
+ dev_put(dev);
+ pr_warn("Failed to obtain node identity\n");
+ return -EINVAL;
+ }
+
+ /* Associate TIPC bearer with L2 bearer */
+ rcu_assign_pointer(b->media_ptr, dev);
+ b->pt.dev = dev;
+ b->pt.type = htons(ETH_P_TIPC);
+ b->pt.func = tipc_l2_rcv_msg;
+ dev_add_pack(&b->pt);
+ memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
+ memcpy(b->bcast_addr.value, dev->broadcast, hwaddr_len);
+ b->bcast_addr.media_id = b->media->type_id;
+ b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT;
+ b->mtu = dev->mtu;
+ b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
+ rcu_assign_pointer(dev->tipc_ptr, b);
+ return 0;
+}
+
+/* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
+ *
+ * Mark L2 bearer as inactive so that incoming buffers are thrown away
+ */
+void tipc_disable_l2_media(struct tipc_bearer *b)
+{
+ struct net_device *dev;
+
+ dev = (struct net_device *)rtnl_dereference(b->media_ptr);
+ dev_remove_pack(&b->pt);
+ RCU_INIT_POINTER(dev->tipc_ptr, NULL);
+ synchronize_net();
+ dev_put(dev);
+}
+
+/**
+ * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
+ * @skb: the packet to be sent
+ * @b: the bearer through which the packet is to be sent
+ * @dest: peer destination address
+ */
+int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
+ struct tipc_bearer *b, struct tipc_media_addr *dest)
+{
+ struct net_device *dev;
+ int delta;
+
+ dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
+ if (!dev)
+ return 0;
+
+ delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
+ if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) {
+ kfree_skb(skb);
+ return 0;
+ }
+ skb_reset_network_header(skb);
+ skb->dev = dev;
+ skb->protocol = htons(ETH_P_TIPC);
+ dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
+ dev->dev_addr, skb->len);
+ dev_queue_xmit(skb);
+ return 0;
+}
+
+bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id)
+{
+ bool supp = false;
+ struct tipc_bearer *b;
+
+ rcu_read_lock();
+ b = bearer_get(net, bearer_id);
+ if (b)
+ supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT);
+ rcu_read_unlock();
+ return supp;
+}
+
+int tipc_bearer_mtu(struct net *net, u32 bearer_id)
+{
+ int mtu = 0;
+ struct tipc_bearer *b;
+
+ rcu_read_lock();
+ b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
+ if (b)
+ mtu = b->mtu;
+ rcu_read_unlock();
+ return mtu;
+}
+
+/* tipc_bearer_xmit_skb - sends buffer to destination over bearer
+ */
+void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
+ struct sk_buff *skb,
+ struct tipc_media_addr *dest)
+{
+ struct tipc_msg *hdr = buf_msg(skb);
+ struct tipc_bearer *b;
+
+ rcu_read_lock();
+ b = bearer_get(net, bearer_id);
+ if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr))))
+ b->media->send_msg(net, skb, b, dest);
+ else
+ kfree_skb(skb);
+ rcu_read_unlock();
+}
+
+/* tipc_bearer_xmit() -send buffer to destination over bearer
+ */
+void tipc_bearer_xmit(struct net *net, u32 bearer_id,
+ struct sk_buff_head *xmitq,
+ struct tipc_media_addr *dst)
+{
+ struct tipc_bearer *b;
+ struct sk_buff *skb, *tmp;
+
+ if (skb_queue_empty(xmitq))
+ return;
+
+ rcu_read_lock();
+ b = bearer_get(net, bearer_id);
+ if (unlikely(!b))
+ __skb_queue_purge(xmitq);
+ skb_queue_walk_safe(xmitq, skb, tmp) {
+ __skb_dequeue(xmitq);
+ if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb))))
+ b->media->send_msg(net, skb, b, dst);
+ else
+ kfree_skb(skb);
+ }
+ rcu_read_unlock();
+}
+
+/* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
+ */
+void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
+ struct sk_buff_head *xmitq)
+{
+ struct tipc_net *tn = tipc_net(net);
+ int net_id = tn->net_id;
+ struct tipc_bearer *b;
+ struct sk_buff *skb, *tmp;
+ struct tipc_msg *hdr;
+
+ rcu_read_lock();
+ b = bearer_get(net, bearer_id);
+ if (unlikely(!b || !test_bit(0, &b->up)))
+ __skb_queue_purge(xmitq);
+ skb_queue_walk_safe(xmitq, skb, tmp) {
+ hdr = buf_msg(skb);
+ msg_set_non_seq(hdr, 1);
+ msg_set_mc_netid(hdr, net_id);
+ __skb_dequeue(xmitq);
+ b->media->send_msg(net, skb, b, &b->bcast_addr);
+ }
+ rcu_read_unlock();
+}
+
+/**
+ * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
+ * @buf: the received packet
+ * @dev: the net device that the packet was received on
+ * @pt: the packet_type structure which was used to register this handler
+ * @orig_dev: the original receive net device in case the device is a bond
+ *
+ * Accept only packets explicitly sent to this node, or broadcast packets;
+ * ignores packets sent using interface multicast, and traffic sent to other
+ * nodes (which can happen if interface is running in promiscuous mode).
+ */
+static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *pt, struct net_device *orig_dev)
+{
+ struct tipc_bearer *b;
+
+ rcu_read_lock();
+ b = rcu_dereference_rtnl(dev->tipc_ptr) ?:
+ rcu_dereference_rtnl(orig_dev->tipc_ptr);
+ if (likely(b && test_bit(0, &b->up) &&
+ (skb->pkt_type <= PACKET_MULTICAST))) {
+ skb->next = NULL;
+ tipc_rcv(dev_net(b->pt.dev), skb, b);
+ rcu_read_unlock();
+ return NET_RX_SUCCESS;
+ }
+ rcu_read_unlock();
+ kfree_skb(skb);
+ return NET_RX_DROP;
+}
+
+/**
+ * tipc_l2_device_event - handle device events from network device
+ * @nb: the context of the notification
+ * @evt: 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.
+ */
+static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
+ void *ptr)
+{
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+ struct net *net = dev_net(dev);
+ struct tipc_bearer *b;
+
+ b = rtnl_dereference(dev->tipc_ptr);
+ if (!b)
+ return NOTIFY_DONE;
+
+ switch (evt) {
+ case NETDEV_CHANGE:
+ if (netif_carrier_ok(dev) && netif_oper_up(dev)) {
+ test_and_set_bit_lock(0, &b->up);
+ break;
+ }
+ /* fall through */
+ case NETDEV_GOING_DOWN:
+ clear_bit_unlock(0, &b->up);
+ tipc_reset_bearer(net, b);
+ break;
+ case NETDEV_UP:
+ test_and_set_bit_lock(0, &b->up);
+ break;
+ case NETDEV_CHANGEMTU:
+ if (tipc_mtu_bad(dev, 0)) {
+ bearer_disable(net, b);
+ break;
+ }
+ b->mtu = dev->mtu;
+ tipc_reset_bearer(net, b);
+ break;
+ case NETDEV_CHANGEADDR:
+ b->media->raw2addr(b, &b->addr,
+ (char *)dev->dev_addr);
+ tipc_reset_bearer(net, b);
+ break;
+ case NETDEV_UNREGISTER:
+ case NETDEV_CHANGENAME:
+ bearer_disable(net, b);
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block notifier = {
+ .notifier_call = tipc_l2_device_event,
+ .priority = 0,
+};
+
+int tipc_bearer_setup(void)
+{
+ return register_netdevice_notifier(¬ifier);
+}
+
+void tipc_bearer_cleanup(void)
+{
+ unregister_netdevice_notifier(¬ifier);
+}
+
+void tipc_bearer_stop(struct net *net)
+{
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
+ struct tipc_bearer *b;
+ u32 i;
+
+ for (i = 0; i < MAX_BEARERS; i++) {
+ b = rtnl_dereference(tn->bearer_list[i]);
+ if (b) {
+ bearer_disable(net, b);
+ tn->bearer_list[i] = NULL;
+ }
+ }
+}
+
+/* Caller should hold rtnl_lock to protect the bearer */
+static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
+ struct tipc_bearer *bearer, int nlflags)
+{
+ void *hdr;
+ struct nlattr *attrs;
+ struct nlattr *prop;
+
+ hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
+ nlflags, TIPC_NL_BEARER_GET);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
+ if (!attrs)
+ goto msg_full;
+
+ if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
+ goto attr_msg_full;
+
+ prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
+ if (!prop)
+ goto prop_msg_full;
+ if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
+ goto prop_msg_full;
+ if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
+ goto prop_msg_full;
+ if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
+ goto prop_msg_full;
+ if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP)
+ if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, bearer->mtu))
+ goto prop_msg_full;
+
+ nla_nest_end(msg->skb, prop);
+
+#ifdef CONFIG_TIPC_MEDIA_UDP
+ if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) {
+ if (tipc_udp_nl_add_bearer_data(msg, bearer))
+ goto attr_msg_full;
+ }
+#endif
+
+ nla_nest_end(msg->skb, attrs);
+ genlmsg_end(msg->skb, hdr);
+
+ return 0;
+
+prop_msg_full:
+ nla_nest_cancel(msg->skb, prop);
+attr_msg_full:
+ nla_nest_cancel(msg->skb, attrs);
+msg_full:
+ genlmsg_cancel(msg->skb, hdr);
+
+ return -EMSGSIZE;
+}
+
+int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ int err;
+ int i = cb->args[0];
+ struct tipc_bearer *bearer;
+ struct tipc_nl_msg msg;
+ struct net *net = sock_net(skb->sk);
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
+
+ if (i == MAX_BEARERS)
+ return 0;
+
+ msg.skb = skb;
+ msg.portid = NETLINK_CB(cb->skb).portid;
+ msg.seq = cb->nlh->nlmsg_seq;
+
+ rtnl_lock();
+ for (i = 0; i < MAX_BEARERS; i++) {
+ bearer = rtnl_dereference(tn->bearer_list[i]);
+ if (!bearer)
+ continue;
+
+ err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
+ if (err)
+ break;
+ }
+ rtnl_unlock();
+
+ cb->args[0] = i;
+ return skb->len;
+}
+
+int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
+{
+ int err;
+ char *name;
+ struct sk_buff *rep;
+ struct tipc_bearer *bearer;
+ struct tipc_nl_msg msg;
+ struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
+ struct net *net = genl_info_net(info);
+
+ if (!info->attrs[TIPC_NLA_BEARER])
+ return -EINVAL;
+
+ err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
+ info->attrs[TIPC_NLA_BEARER],
+ tipc_nl_bearer_policy, info->extack);
+ if (err)
+ return err;
+
+ if (!attrs[TIPC_NLA_BEARER_NAME])
+ return -EINVAL;
+ name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
+
+ rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!rep)
+ return -ENOMEM;
+
+ msg.skb = rep;
+ msg.portid = info->snd_portid;
+ msg.seq = info->snd_seq;
+
+ rtnl_lock();
+ bearer = tipc_bearer_find(net, name);
+ if (!bearer) {
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ err = __tipc_nl_add_bearer(&msg, bearer, 0);
+ if (err)
+ goto err_out;
+ rtnl_unlock();
+
+ return genlmsg_reply(rep, info);
+err_out:
+ rtnl_unlock();
+ nlmsg_free(rep);
+
+ return err;
+}
+
+int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
+{
+ int err;
+ char *name;
+ struct tipc_bearer *bearer;
+ struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
+ struct net *net = sock_net(skb->sk);
+
+ if (!info->attrs[TIPC_NLA_BEARER])
+ return -EINVAL;
+
+ err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
+ info->attrs[TIPC_NLA_BEARER],
+ tipc_nl_bearer_policy, info->extack);
+ if (err)
+ return err;
+
+ if (!attrs[TIPC_NLA_BEARER_NAME])
+ return -EINVAL;
+
+ name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
+
+ bearer = tipc_bearer_find(net, name);
+ if (!bearer)
+ return -EINVAL;
+
+ bearer_disable(net, bearer);
+
+ return 0;
+}
+
+int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
+{
+ int err;
+
+ rtnl_lock();
+ err = __tipc_nl_bearer_disable(skb, info);
+ rtnl_unlock();
+
+ return err;
+}
+
+int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
+{
+ int err;
+ char *bearer;
+ struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
+ struct net *net = sock_net(skb->sk);
+ u32 domain = 0;
+ u32 prio;
+
+ prio = TIPC_MEDIA_LINK_PRI;
+
+ if (!info->attrs[TIPC_NLA_BEARER])
+ return -EINVAL;
+
+ err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
+ info->attrs[TIPC_NLA_BEARER],
+ tipc_nl_bearer_policy, info->extack);
+ if (err)
+ return err;
+
+ if (!attrs[TIPC_NLA_BEARER_NAME])
+ return -EINVAL;
+
+ bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
+
+ if (attrs[TIPC_NLA_BEARER_DOMAIN])
+ domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
+
+ if (attrs[TIPC_NLA_BEARER_PROP]) {
+ struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
+
+ err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
+ props);
+ if (err)
+ return err;
+
+ if (props[TIPC_NLA_PROP_PRIO])
+ prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
+ }
+
+ return tipc_enable_bearer(net, bearer, domain, prio, attrs);
+}
+
+int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
+{
+ int err;
+
+ rtnl_lock();
+ err = __tipc_nl_bearer_enable(skb, info);
+ rtnl_unlock();
+
+ return err;
+}
+
+int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info)
+{
+ int err;
+ char *name;
+ struct tipc_bearer *b;
+ struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
+ struct net *net = sock_net(skb->sk);
+
+ if (!info->attrs[TIPC_NLA_BEARER])
+ return -EINVAL;
+
+ err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
+ info->attrs[TIPC_NLA_BEARER],
+ tipc_nl_bearer_policy, info->extack);
+ if (err)
+ return err;
+
+ if (!attrs[TIPC_NLA_BEARER_NAME])
+ return -EINVAL;
+ name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
+
+ rtnl_lock();
+ b = tipc_bearer_find(net, name);
+ if (!b) {
+ rtnl_unlock();
+ return -EINVAL;
+ }
+
+#ifdef CONFIG_TIPC_MEDIA_UDP
+ if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) {
+ err = tipc_udp_nl_bearer_add(b,
+ attrs[TIPC_NLA_BEARER_UDP_OPTS]);
+ if (err) {
+ rtnl_unlock();
+ return err;
+ }
+ }
+#endif
+ rtnl_unlock();
+
+ return 0;
+}
+
+int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
+{
+ struct tipc_bearer *b;
+ struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
+ struct net *net = sock_net(skb->sk);
+ char *name;
+ int err;
+
+ if (!info->attrs[TIPC_NLA_BEARER])
+ return -EINVAL;
+
+ err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
+ info->attrs[TIPC_NLA_BEARER],
+ tipc_nl_bearer_policy, info->extack);
+ if (err)
+ return err;
+
+ if (!attrs[TIPC_NLA_BEARER_NAME])
+ return -EINVAL;
+ name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
+
+ b = tipc_bearer_find(net, name);
+ if (!b)
+ return -EINVAL;
+
+ if (attrs[TIPC_NLA_BEARER_PROP]) {
+ struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
+
+ err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
+ props);
+ if (err)
+ return err;
+
+ if (props[TIPC_NLA_PROP_TOL]) {
+ b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
+ tipc_node_apply_property(net, b, TIPC_NLA_PROP_TOL);
+ }
+ if (props[TIPC_NLA_PROP_PRIO])
+ b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
+ if (props[TIPC_NLA_PROP_WIN])
+ b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
+ if (props[TIPC_NLA_PROP_MTU]) {
+ if (b->media->type_id != TIPC_MEDIA_TYPE_UDP)
+ return -EINVAL;
+#ifdef CONFIG_TIPC_MEDIA_UDP
+ if (tipc_udp_mtu_bad(nla_get_u32
+ (props[TIPC_NLA_PROP_MTU])))
+ return -EINVAL;
+ b->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
+ tipc_node_apply_property(net, b, TIPC_NLA_PROP_MTU);
+#endif
+ }
+ }
+
+ return 0;
+}
+
+int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
+{
+ int err;
+
+ rtnl_lock();
+ err = __tipc_nl_bearer_set(skb, info);
+ rtnl_unlock();
+
+ return err;
+}
+
+static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
+ struct tipc_media *media, int nlflags)
+{
+ void *hdr;
+ struct nlattr *attrs;
+ struct nlattr *prop;
+
+ hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
+ nlflags, TIPC_NL_MEDIA_GET);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
+ if (!attrs)
+ goto msg_full;
+
+ if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
+ goto attr_msg_full;
+
+ prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
+ if (!prop)
+ goto prop_msg_full;
+ if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
+ goto prop_msg_full;
+ if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
+ goto prop_msg_full;
+ if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
+ goto prop_msg_full;
+ if (media->type_id == TIPC_MEDIA_TYPE_UDP)
+ if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, media->mtu))
+ goto prop_msg_full;
+
+ nla_nest_end(msg->skb, prop);
+ nla_nest_end(msg->skb, attrs);
+ genlmsg_end(msg->skb, hdr);
+
+ return 0;
+
+prop_msg_full:
+ nla_nest_cancel(msg->skb, prop);
+attr_msg_full:
+ nla_nest_cancel(msg->skb, attrs);
+msg_full:
+ genlmsg_cancel(msg->skb, hdr);
+
+ return -EMSGSIZE;
+}
+
+int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ int err;
+ int i = cb->args[0];
+ struct tipc_nl_msg msg;
+
+ if (i == MAX_MEDIA)
+ return 0;
+
+ msg.skb = skb;
+ msg.portid = NETLINK_CB(cb->skb).portid;
+ msg.seq = cb->nlh->nlmsg_seq;
+
+ rtnl_lock();
+ for (; media_info_array[i] != NULL; i++) {
+ err = __tipc_nl_add_media(&msg, media_info_array[i],
+ NLM_F_MULTI);
+ if (err)
+ break;
+ }
+ rtnl_unlock();
+
+ cb->args[0] = i;
+ return skb->len;
+}
+
+int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
+{
+ int err;
+ char *name;
+ struct tipc_nl_msg msg;
+ struct tipc_media *media;
+ struct sk_buff *rep;
+ struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
+
+ if (!info->attrs[TIPC_NLA_MEDIA])
+ return -EINVAL;
+
+ err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
+ info->attrs[TIPC_NLA_MEDIA],
+ tipc_nl_media_policy, info->extack);
+ if (err)
+ return err;
+
+ if (!attrs[TIPC_NLA_MEDIA_NAME])
+ return -EINVAL;
+ name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
+
+ rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!rep)
+ return -ENOMEM;
+
+ msg.skb = rep;
+ msg.portid = info->snd_portid;
+ msg.seq = info->snd_seq;
+
+ rtnl_lock();
+ media = tipc_media_find(name);
+ if (!media) {
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ err = __tipc_nl_add_media(&msg, media, 0);
+ if (err)
+ goto err_out;
+ rtnl_unlock();
+
+ return genlmsg_reply(rep, info);
+err_out:
+ rtnl_unlock();
+ nlmsg_free(rep);
+
+ return err;
+}
+
+int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
+{
+ int err;
+ char *name;
+ struct tipc_media *m;
+ struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
+
+ if (!info->attrs[TIPC_NLA_MEDIA])
+ return -EINVAL;
+
+ err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
+ info->attrs[TIPC_NLA_MEDIA],
+ tipc_nl_media_policy, info->extack);
+
+ if (!attrs[TIPC_NLA_MEDIA_NAME])
+ return -EINVAL;
+ name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
+
+ m = tipc_media_find(name);
+ if (!m)
+ return -EINVAL;
+
+ if (attrs[TIPC_NLA_MEDIA_PROP]) {
+ struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
+
+ err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
+ props);
+ if (err)
+ return err;
+
+ if (props[TIPC_NLA_PROP_TOL])
+ m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
+ if (props[TIPC_NLA_PROP_PRIO])
+ m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
+ if (props[TIPC_NLA_PROP_WIN])
+ m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
+ if (props[TIPC_NLA_PROP_MTU]) {
+ if (m->type_id != TIPC_MEDIA_TYPE_UDP)
+ return -EINVAL;
+#ifdef CONFIG_TIPC_MEDIA_UDP
+ if (tipc_udp_mtu_bad(nla_get_u32
+ (props[TIPC_NLA_PROP_MTU])))
+ return -EINVAL;
+ m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
+#endif
+ }
+ }
+
+ return 0;
+}
+
+int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
+{
+ int err;
+
+ rtnl_lock();
+ err = __tipc_nl_media_set(skb, info);
+ rtnl_unlock();
+
+ return err;
+}