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net: replace br_fdb_external_learn_* calls with switchdev notifier events

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This patch benefits from newly introduced switchdev notifier and uses it
to propagate fdb learn events from rocker driver to bridge. That avoids
direct function calls and possible use by other listeners (ovs).

Suggested-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko
2015-01-15 23:49:37 +01:00
committed by David S. Miller
parent 03bf0c2812
commit 3aeb66176f
6 changed files with 78 additions and 55 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
net/bridge/br.c
View File

@@ -19,6 +19,7 @@
#include <linux/llc.h>
#include <net/llc.h>
#include <net/stp.h>
#include <net/switchdev.h>
#include "br_private.h"
@@ -120,6 +121,48 @@ static struct notifier_block br_device_notifier = {
.notifier_call = br_device_event
};
static int br_netdev_switch_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_switch_notifier_info_to_dev(ptr);
struct net_bridge_port *p;
struct net_bridge *br;
struct netdev_switch_notifier_fdb_info *fdb_info;
int err = NOTIFY_DONE;
rtnl_lock();
p = br_port_get_rtnl(dev);
if (!p)
goto out;
br = p->br;
switch (event) {
case NETDEV_SWITCH_FDB_ADD:
fdb_info = ptr;
err = br_fdb_external_learn_add(br, p, fdb_info->addr,
fdb_info->vid);
if (err)
err = notifier_from_errno(err);
break;
case NETDEV_SWITCH_FDB_DEL:
fdb_info = ptr;
err = br_fdb_external_learn_del(br, p, fdb_info->addr,
fdb_info->vid);
if (err)
err = notifier_from_errno(err);
break;
}
out:
rtnl_unlock();
return err;
}
static struct notifier_block br_netdev_switch_notifier = {
.notifier_call = br_netdev_switch_event,
};
static void __net_exit br_net_exit(struct net *net)
{
struct net_device *dev;
@@ -169,10 +212,14 @@ static int __init br_init(void)
if (err)
goto err_out3;
err = br_netlink_init();
err = register_netdev_switch_notifier(&br_netdev_switch_notifier);
if (err)
goto err_out4;
err = br_netlink_init();
if (err)
goto err_out5;
brioctl_set(br_ioctl_deviceless_stub);
#if IS_ENABLED(CONFIG_ATM_LANE)
@@ -185,6 +232,8 @@ static int __init br_init(void)
return 0;
err_out5:
unregister_netdev_switch_notifier(&br_netdev_switch_notifier);
err_out4:
unregister_netdevice_notifier(&br_device_notifier);
err_out3:
@@ -202,6 +251,7 @@ static void __exit br_deinit(void)
{
stp_proto_unregister(&br_stp_proto);
br_netlink_fini();
unregister_netdev_switch_notifier(&br_netdev_switch_notifier);
unregister_netdevice_notifier(&br_device_notifier);
brioctl_set(NULL);
unregister_pernet_subsys(&br_net_ops);

38
net/bridge/br_fdb.c
View File

@@ -990,26 +990,14 @@ void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p)
}
}
int br_fdb_external_learn_add(struct net_device *dev,
int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
const unsigned char *addr, u16 vid)
{
struct net_bridge_port *p;
struct net_bridge *br;
struct hlist_head *head;
struct net_bridge_fdb_entry *fdb;
int err = 0;
rtnl_lock();
p = br_port_get_rtnl(dev);
if (!p) {
pr_info("bridge: %s not a bridge port\n", dev->name);
err = -EINVAL;
goto err_rtnl_unlock;
}
br = p->br;
ASSERT_RTNL();
spin_lock_bh(&br->hash_lock);
head = &br->hash[br_mac_hash(addr, vid)];
@@ -1034,33 +1022,18 @@ int br_fdb_external_learn_add(struct net_device *dev,
err_unlock:
spin_unlock_bh(&br->hash_lock);
err_rtnl_unlock:
rtnl_unlock();
return err;
}
EXPORT_SYMBOL(br_fdb_external_learn_add);
int br_fdb_external_learn_del(struct net_device *dev,
int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
const unsigned char *addr, u16 vid)
{
struct net_bridge_port *p;
struct net_bridge *br;
struct hlist_head *head;
struct net_bridge_fdb_entry *fdb;
int err = 0;
rtnl_lock();
p = br_port_get_rtnl(dev);
if (!p) {
pr_info("bridge: %s not a bridge port\n", dev->name);
err = -EINVAL;
goto err_rtnl_unlock;
}
br = p->br;
ASSERT_RTNL();
spin_lock_bh(&br->hash_lock);
head = &br->hash[br_mac_hash(addr, vid)];
@@ -1071,9 +1044,6 @@ int br_fdb_external_learn_del(struct net_device *dev,
err = -ENOENT;
spin_unlock_bh(&br->hash_lock);
err_rtnl_unlock:
rtnl_unlock();
return err;
}
EXPORT_SYMBOL(br_fdb_external_learn_del);

4
net/bridge/br_private.h
View File

@@ -402,6 +402,10 @@ int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
struct net_device *dev, struct net_device *fdev, int idx);
int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
const unsigned char *addr, u16 vid);
int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
const unsigned char *addr, u16 vid);
/* br_forward.c */
void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);