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Diffstat (limited to 'net/bridge/br.c')
-rw-r--r--net/bridge/br.c303
1 files changed, 270 insertions, 33 deletions
diff --git a/net/bridge/br.c b/net/bridge/br.c
index 1407d1ba7577..c37e52e2f29a 100644
--- a/net/bridge/br.c
+++ b/net/bridge/br.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Generic parts
* Linux ethernet bridge
*
* Authors:
* Lennert Buytenhek <buytenh@gnu.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*/
#include <linux/module.h>
@@ -31,16 +27,40 @@
*/
static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
{
+ struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
+ struct netdev_notifier_pre_changeaddr_info *prechaddr_info;
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct net_bridge_port *p;
struct net_bridge *br;
+ bool notified = false;
bool changed_addr;
int err;
- /* register of bridge completed, add sysfs entries */
- if ((dev->priv_flags & IFF_EBRIDGE) && event == NETDEV_REGISTER) {
- br_sysfs_addbr(dev);
- return NOTIFY_DONE;
+ if (netif_is_bridge_master(dev)) {
+ struct net_bridge *br = netdev_priv(dev);
+
+ if (event == NETDEV_REGISTER)
+ br_fdb_change_mac_address(br, dev->dev_addr);
+
+ err = br_vlan_bridge_event(dev, event, ptr);
+ if (err)
+ return notifier_from_errno(err);
+
+ if (event == NETDEV_REGISTER) {
+ /* register of bridge completed, add sysfs entries */
+ err = br_sysfs_addbr(dev);
+ if (err)
+ return notifier_from_errno(err);
+
+ return NOTIFY_DONE;
+ }
+ }
+
+ if (is_vlan_dev(dev)) {
+ struct net_device *real_dev = vlan_dev_real_dev(dev);
+
+ if (netif_is_bridge_master(real_dev))
+ br_vlan_vlan_upper_event(real_dev, dev, event);
}
/* not a port of a bridge */
@@ -52,7 +72,18 @@ static int br_device_event(struct notifier_block *unused, unsigned long event, v
switch (event) {
case NETDEV_CHANGEMTU:
- dev_set_mtu(br->dev, br_min_mtu(br));
+ br_mtu_auto_adjust(br);
+ break;
+
+ case NETDEV_PRE_CHANGEADDR:
+ if (br->dev->addr_assign_type == NET_ADDR_SET)
+ break;
+ prechaddr_info = ptr;
+ err = netif_pre_changeaddr_notify(br->dev,
+ prechaddr_info->dev_addr,
+ extack);
+ if (err)
+ return notifier_from_errno(err);
break;
case NETDEV_CHANGEADDR:
@@ -67,7 +98,7 @@ static int br_device_event(struct notifier_block *unused, unsigned long event, v
break;
case NETDEV_CHANGE:
- br_port_carrier_check(p);
+ br_port_carrier_check(p, &notified);
break;
case NETDEV_FEAT_CHANGE:
@@ -76,8 +107,10 @@ static int br_device_event(struct notifier_block *unused, unsigned long event, v
case NETDEV_DOWN:
spin_lock_bh(&br->lock);
- if (br->dev->flags & IFF_UP)
+ if (br->dev->flags & IFF_UP) {
br_stp_disable_port(p);
+ notified = true;
+ }
spin_unlock_bh(&br->lock);
break;
@@ -85,6 +118,7 @@ static int br_device_event(struct notifier_block *unused, unsigned long event, v
if (netif_running(br->dev) && netif_oper_up(dev)) {
spin_lock_bh(&br->lock);
br_stp_enable_port(p);
+ notified = true;
spin_unlock_bh(&br->lock);
}
break;
@@ -100,7 +134,7 @@ static int br_device_event(struct notifier_block *unused, unsigned long event, v
break;
case NETDEV_PRE_TYPE_CHANGE:
- /* Forbid underlaying device to change its type. */
+ /* Forbid underlying device to change its type. */
return NOTIFY_BAD;
case NETDEV_RESEND_IGMP:
@@ -109,10 +143,13 @@ static int br_device_event(struct notifier_block *unused, unsigned long event, v
break;
}
+ if (event != NETDEV_UNREGISTER)
+ br_vlan_port_event(p, event);
+
/* Events that may cause spanning tree to refresh */
- if (event == NETDEV_CHANGEADDR || event == NETDEV_UP ||
- event == NETDEV_CHANGE || event == NETDEV_DOWN)
- br_ifinfo_notify(RTM_NEWLINK, p);
+ if (!notified && (event == NETDEV_CHANGEADDR || event == NETDEV_UP ||
+ event == NETDEV_CHANGE || event == NETDEV_DOWN))
+ br_ifinfo_notify(RTM_NEWLINK, NULL, p);
return NOTIFY_DONE;
}
@@ -141,25 +178,31 @@ static int br_switchdev_event(struct notifier_block *unused,
case SWITCHDEV_FDB_ADD_TO_BRIDGE:
fdb_info = ptr;
err = br_fdb_external_learn_add(br, p, fdb_info->addr,
- fdb_info->vid);
+ fdb_info->vid,
+ fdb_info->locked, false);
if (err) {
err = notifier_from_errno(err);
break;
}
br_fdb_offloaded_set(br, p, fdb_info->addr,
- fdb_info->vid);
+ fdb_info->vid, fdb_info->offloaded);
break;
case SWITCHDEV_FDB_DEL_TO_BRIDGE:
fdb_info = ptr;
err = br_fdb_external_learn_del(br, p, fdb_info->addr,
- fdb_info->vid);
+ fdb_info->vid, false);
if (err)
err = notifier_from_errno(err);
break;
case SWITCHDEV_FDB_OFFLOADED:
fdb_info = ptr;
br_fdb_offloaded_set(br, p, fdb_info->addr,
- fdb_info->vid);
+ fdb_info->vid, fdb_info->offloaded);
+ break;
+ case SWITCHDEV_FDB_FLUSH_TO_BRIDGE:
+ fdb_info = ptr;
+ /* Don't delete static entries */
+ br_fdb_delete_by_port(br, p, fdb_info->vid, 0);
break;
}
@@ -171,23 +214,208 @@ static struct notifier_block br_switchdev_notifier = {
.notifier_call = br_switchdev_event,
};
-static void __net_exit br_net_exit(struct net *net)
+/* called under rtnl_mutex */
+static int br_switchdev_blocking_event(struct notifier_block *nb,
+ unsigned long event, void *ptr)
{
- struct net_device *dev;
- LIST_HEAD(list);
+ struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
+ struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
+ struct switchdev_notifier_brport_info *brport_info;
+ const struct switchdev_brport *b;
+ struct net_bridge_port *p;
+ int err = NOTIFY_DONE;
- rtnl_lock();
- for_each_netdev(net, dev)
- if (dev->priv_flags & IFF_EBRIDGE)
- br_dev_delete(dev, &list);
+ p = br_port_get_rtnl(dev);
+ if (!p)
+ goto out;
+
+ switch (event) {
+ case SWITCHDEV_BRPORT_OFFLOADED:
+ brport_info = ptr;
+ b = &brport_info->brport;
+
+ err = br_switchdev_port_offload(p, b->dev, b->ctx,
+ b->atomic_nb, b->blocking_nb,
+ b->tx_fwd_offload, extack);
+ err = notifier_from_errno(err);
+ break;
+ case SWITCHDEV_BRPORT_UNOFFLOADED:
+ brport_info = ptr;
+ b = &brport_info->brport;
+
+ br_switchdev_port_unoffload(p, b->ctx, b->atomic_nb,
+ b->blocking_nb);
+ break;
+ case SWITCHDEV_BRPORT_REPLAY:
+ brport_info = ptr;
+ b = &brport_info->brport;
- unregister_netdevice_many(&list);
- rtnl_unlock();
+ err = br_switchdev_port_replay(p, b->dev, b->ctx, b->atomic_nb,
+ b->blocking_nb, extack);
+ err = notifier_from_errno(err);
+ break;
+ }
+out:
+ return err;
+}
+
+static struct notifier_block br_switchdev_blocking_notifier = {
+ .notifier_call = br_switchdev_blocking_event,
+};
+
+static int
+br_toggle_fdb_local_vlan_0(struct net_bridge *br, bool on,
+ struct netlink_ext_ack *extack)
+{
+ int err;
+
+ if (br_opt_get(br, BROPT_FDB_LOCAL_VLAN_0) == on)
+ return 0;
+
+ err = br_fdb_toggle_local_vlan_0(br, on, extack);
+ if (err)
+ return err;
+
+ br_opt_toggle(br, BROPT_FDB_LOCAL_VLAN_0, on);
+ return 0;
+}
+
+/* br_boolopt_toggle - change user-controlled boolean option
+ *
+ * @br: bridge device
+ * @opt: id of the option to change
+ * @on: new option value
+ * @extack: extack for error messages
+ *
+ * Changes the value of the respective boolean option to @on taking care of
+ * any internal option value mapping and configuration.
+ */
+int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
+ struct netlink_ext_ack *extack)
+{
+ int err = 0;
+
+ switch (opt) {
+ case BR_BOOLOPT_NO_LL_LEARN:
+ br_opt_toggle(br, BROPT_NO_LL_LEARN, on);
+ break;
+ case BR_BOOLOPT_MCAST_VLAN_SNOOPING:
+ err = br_multicast_toggle_vlan_snooping(br, on, extack);
+ break;
+ case BR_BOOLOPT_MST_ENABLE:
+ err = br_mst_set_enabled(br, on, extack);
+ break;
+ case BR_BOOLOPT_MDB_OFFLOAD_FAIL_NOTIFICATION:
+ br_opt_toggle(br, BROPT_MDB_OFFLOAD_FAIL_NOTIFICATION, on);
+ break;
+ case BR_BOOLOPT_FDB_LOCAL_VLAN_0:
+ err = br_toggle_fdb_local_vlan_0(br, on, extack);
+ break;
+ default:
+ /* shouldn't be called with unsupported options */
+ WARN_ON(1);
+ break;
+ }
+
+ return err;
+}
+
+int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt)
+{
+ switch (opt) {
+ case BR_BOOLOPT_NO_LL_LEARN:
+ return br_opt_get(br, BROPT_NO_LL_LEARN);
+ case BR_BOOLOPT_MCAST_VLAN_SNOOPING:
+ return br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED);
+ case BR_BOOLOPT_MST_ENABLE:
+ return br_opt_get(br, BROPT_MST_ENABLED);
+ case BR_BOOLOPT_MDB_OFFLOAD_FAIL_NOTIFICATION:
+ return br_opt_get(br, BROPT_MDB_OFFLOAD_FAIL_NOTIFICATION);
+ case BR_BOOLOPT_FDB_LOCAL_VLAN_0:
+ return br_opt_get(br, BROPT_FDB_LOCAL_VLAN_0);
+ default:
+ /* shouldn't be called with unsupported options */
+ WARN_ON(1);
+ break;
+ }
+
+ return 0;
+}
+
+int br_boolopt_multi_toggle(struct net_bridge *br,
+ struct br_boolopt_multi *bm,
+ struct netlink_ext_ack *extack)
+{
+ unsigned long bitmap = bm->optmask;
+ int err = 0;
+ int opt_id;
+
+ opt_id = find_next_bit(&bitmap, BITS_PER_LONG, BR_BOOLOPT_MAX);
+ if (opt_id != BITS_PER_LONG) {
+ NL_SET_ERR_MSG_FMT_MOD(extack, "Unknown boolean option %d",
+ opt_id);
+ return -EINVAL;
+ }
+
+ for_each_set_bit(opt_id, &bitmap, BR_BOOLOPT_MAX) {
+ bool on = !!(bm->optval & BIT(opt_id));
+
+ err = br_boolopt_toggle(br, opt_id, on, extack);
+ if (err) {
+ br_debug(br, "boolopt multi-toggle error: option: %d current: %d new: %d error: %d\n",
+ opt_id, br_boolopt_get(br, opt_id), on, err);
+ break;
+ }
+ }
+
+ return err;
+}
+
+void br_boolopt_multi_get(const struct net_bridge *br,
+ struct br_boolopt_multi *bm)
+{
+ u32 optval = 0;
+ int opt_id;
+
+ for (opt_id = 0; opt_id < BR_BOOLOPT_MAX; opt_id++)
+ optval |= (br_boolopt_get(br, opt_id) << opt_id);
+
+ bm->optval = optval;
+ bm->optmask = GENMASK((BR_BOOLOPT_MAX - 1), 0);
+}
+
+/* private bridge options, controlled by the kernel */
+void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on)
+{
+ bool cur = !!br_opt_get(br, opt);
+
+ br_debug(br, "toggle option: %d state: %d -> %d\n",
+ opt, cur, on);
+
+ if (cur == on)
+ return;
+
+ if (on)
+ set_bit(opt, &br->options);
+ else
+ clear_bit(opt, &br->options);
+}
+
+static void __net_exit br_net_exit_rtnl(struct net *net,
+ struct list_head *dev_to_kill)
+{
+ struct net_device *dev;
+
+ ASSERT_RTNL_NET(net);
+
+ for_each_netdev(net, dev)
+ if (netif_is_bridge_master(dev))
+ br_dev_delete(dev, dev_to_kill);
}
static struct pernet_operations br_net_ops = {
- .exit = br_net_exit,
+ .exit_rtnl = br_net_exit_rtnl,
};
static const struct stp_proto br_stp_proto = {
@@ -198,7 +426,7 @@ static int __init br_init(void)
{
int err;
- BUILD_BUG_ON(sizeof(struct br_input_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
+ BUILD_BUG_ON(sizeof(struct br_input_skb_cb) > sizeof_field(struct sk_buff, cb));
err = stp_proto_register(&br_stp_proto);
if (err < 0) {
@@ -226,11 +454,15 @@ static int __init br_init(void)
if (err)
goto err_out4;
- err = br_netlink_init();
+ err = register_switchdev_blocking_notifier(&br_switchdev_blocking_notifier);
if (err)
goto err_out5;
- brioctl_set(br_ioctl_deviceless_stub);
+ err = br_netlink_init();
+ if (err)
+ goto err_out6;
+
+ brioctl_set(br_ioctl_stub);
#if IS_ENABLED(CONFIG_ATM_LANE)
br_fdb_test_addr_hook = br_fdb_test_addr;
@@ -244,6 +476,8 @@ static int __init br_init(void)
return 0;
+err_out6:
+ unregister_switchdev_blocking_notifier(&br_switchdev_blocking_notifier);
err_out5:
unregister_switchdev_notifier(&br_switchdev_notifier);
err_out4:
@@ -263,6 +497,7 @@ static void __exit br_deinit(void)
{
stp_proto_unregister(&br_stp_proto);
br_netlink_fini();
+ unregister_switchdev_blocking_notifier(&br_switchdev_blocking_notifier);
unregister_switchdev_notifier(&br_switchdev_notifier);
unregister_netdevice_notifier(&br_device_notifier);
brioctl_set(NULL);
@@ -282,3 +517,5 @@ module_exit(br_deinit)
MODULE_LICENSE("GPL");
MODULE_VERSION(BR_VERSION);
MODULE_ALIAS_RTNL_LINK("bridge");
+MODULE_DESCRIPTION("Ethernet bridge driver");
+MODULE_IMPORT_NS("NETDEV_INTERNAL");
generated by cgit (git 2.34.1) at 2025-12-25 12:58:44 +0000