Release 4.8 net/bridge/br.c
/*
* 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>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/llc.h>
#include <net/llc.h>
#include <net/stp.h>
#include <net/switchdev.h>
#include "br_private.h"
/*
* Handle changes in state of network devices enslaved to a bridge.
*
* Note: don't care about up/down if bridge itself is down, because
* port state is checked when bridge is brought up.
*/
static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct net_bridge_port *p;
struct net_bridge *br;
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;
}
/* not a port of a bridge */
p = br_port_get_rtnl(dev);
if (!p)
return NOTIFY_DONE;
br = p->br;
switch (event) {
case NETDEV_CHANGEMTU:
dev_set_mtu(br->dev, br_min_mtu(br));
break;
case NETDEV_CHANGEADDR:
spin_lock_bh(&br->lock);
br_fdb_changeaddr(p, dev->dev_addr);
changed_addr = br_stp_recalculate_bridge_id(br);
spin_unlock_bh(&br->lock);
if (changed_addr)
call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev);
break;
case NETDEV_CHANGE:
br_port_carrier_check(p);
break;
case NETDEV_FEAT_CHANGE:
netdev_update_features(br->dev);
break;
case NETDEV_DOWN:
spin_lock_bh(&br->lock);
if (br->dev->flags & IFF_UP)
br_stp_disable_port(p);
spin_unlock_bh(&br->lock);
break;
case NETDEV_UP:
if (netif_running(br->dev) && netif_oper_up(dev)) {
spin_lock_bh(&br->lock);
br_stp_enable_port(p);
spin_unlock_bh(&br->lock);
}
break;
case NETDEV_UNREGISTER:
br_del_if(br, dev);
break;
case NETDEV_CHANGENAME:
err = br_sysfs_renameif(p);
if (err)
return notifier_from_errno(err);
break;
case NETDEV_PRE_TYPE_CHANGE:
/* Forbid underlaying device to change its type. */
return NOTIFY_BAD;
case NETDEV_RESEND_IGMP:
/* Propagate to master device */
call_netdevice_notifiers(event, br->dev);
break;
}
/* 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);
return NOTIFY_DONE;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| americo wang | americo wang | 341 | 100.00% | 1 | 100.00% |
| Total | 341 | 100.00% | 1 | 100.00% |
static struct notifier_block br_device_notifier = {
.notifier_call = br_device_event
};
/* called with RTNL */
static int br_switchdev_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
struct net_bridge_port *p;
struct net_bridge *br;
struct switchdev_notifier_fdb_info *fdb_info;
int err = NOTIFY_DONE;
p = br_port_get_rtnl(dev);
if (!p)
goto out;
br = p->br;
switch (event) {
case SWITCHDEV_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 SWITCHDEV_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:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jiri pirko | jiri pirko | 153 | 100.00% | 2 | 100.00% |
| Total | 153 | 100.00% | 2 | 100.00% |
static struct notifier_block br_switchdev_notifier = {
.notifier_call = br_switchdev_event,
};
static void __net_exit br_net_exit(struct net *net)
{
struct net_device *dev;
LIST_HEAD(list);
rtnl_lock();
for_each_netdev(net, dev)
if (dev->priv_flags & IFF_EBRIDGE)
br_dev_delete(dev, &list);
unregister_netdevice_many(&list);
rtnl_unlock();
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| americo wang | americo wang | 56 | 100.00% | 1 | 100.00% |
| Total | 56 | 100.00% | 1 | 100.00% |
static struct pernet_operations br_net_ops = {
.exit = br_net_exit,
};
static const struct stp_proto br_stp_proto = {
.rcv = br_stp_rcv,
};
static int __init br_init(void)
{
int err;
BUILD_BUG_ON(sizeof(struct br_input_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
err = stp_proto_register(&br_stp_proto);
if (err < 0) {
pr_err("bridge: can't register sap for STP\n");
return err;
}
err = br_fdb_init();
if (err)
goto err_out;
err = register_pernet_subsys(&br_net_ops);
if (err)
goto err_out1;
err = br_nf_core_init();
if (err)
goto err_out2;
err = register_netdevice_notifier(&br_device_notifier);
if (err)
goto err_out3;
err = register_switchdev_notifier(&br_switchdev_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)
br_fdb_test_addr_hook = br_fdb_test_addr;
#endif
pr_info("bridge: automatic filtering via arp/ip/ip6tables has been "
"deprecated. Update your scripts to load br_netfilter if you "
"need this.\n");
return 0;
err_out5:
unregister_switchdev_notifier(&br_switchdev_notifier);
err_out4:
unregister_netdevice_notifier(&br_device_notifier);
err_out3:
br_nf_core_fini();
err_out2:
unregister_pernet_subsys(&br_net_ops);
err_out1:
br_fdb_fini();
err_out:
stp_proto_unregister(&br_stp_proto);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stephen hemminger | stephen hemminger | 61 | 29.61% | 6 | 26.09% |
| alexey dobriyan | alexey dobriyan | 27 | 13.11% | 1 | 4.35% |
| jiri pirko | jiri pirko | 24 | 11.65% | 2 | 8.70% |
| florian westphal | florian westphal | 17 | 8.25% | 1 | 4.35% |
| pre-git | pre-git | 16 | 7.77% | 5 | 21.74% |
| thomas graf | thomas graf | 15 | 7.28% | 1 | 4.35% |
| patrick mchardy | patrick mchardy | 11 | 5.34% | 1 | 4.35% |
| michal miroslaw | michal miroslaw | 9 | 4.37% | 1 | 4.35% |
| pablo neira ayuso | pablo neira ayuso | 9 | 4.37% | 1 | 4.35% |
| akinobu mita | akinobu mita | 8 | 3.88% | 1 | 4.35% |
| pavel emelianov | pavel emelianov | 6 | 2.91% | 1 | 4.35% |
| bart de schuymer | bart de schuymer | 2 | 0.97% | 1 | 4.35% |
| igor maravic | igor maravic | 1 | 0.49% | 1 | 4.35% |
| Total | 206 | 100.00% | 23 | 100.00% |
static void __exit br_deinit(void)
{
stp_proto_unregister(&br_stp_proto);
br_netlink_fini();
unregister_switchdev_notifier(&br_switchdev_notifier);
unregister_netdevice_notifier(&br_device_notifier);
brioctl_set(NULL);
unregister_pernet_subsys(&br_net_ops);
rcu_barrier(); /* Wait for completion of call_rcu()'s */
br_nf_core_fini();
#if IS_ENABLED(CONFIG_ATM_LANE)
br_fdb_test_addr_hook = NULL;
#endif
br_fdb_fini();
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 19 | 30.16% | 5 | 25.00% |
| stephen hemminger | stephen hemminger | 13 | 20.63% | 5 | 25.00% |
| michal miroslaw | michal miroslaw | 8 | 12.70% | 1 | 5.00% |
| jiri pirko | jiri pirko | 6 | 9.52% | 2 | 10.00% |
| alexey dobriyan | alexey dobriyan | 5 | 7.94% | 1 | 5.00% |
| lennert buytenhek | lennert buytenhek | 3 | 4.76% | 1 | 5.00% |
| patrick mchardy | patrick mchardy | 3 | 4.76% | 1 | 5.00% |
| bodo stroesser | bodo stroesser | 2 | 3.17% | 1 | 5.00% |
| jesper dangaard brouer | jesper dangaard brouer | 2 | 3.17% | 1 | 5.00% |
| igor maravic | igor maravic | 1 | 1.59% | 1 | 5.00% |
| pablo neira ayuso | pablo neira ayuso | 1 | 1.59% | 1 | 5.00% |
| Total | 63 | 100.00% | 20 | 100.00% |
module_init(br_init)
module_exit(br_deinit)
MODULE_LICENSE("GPL");
MODULE_VERSION(BR_VERSION);
MODULE_ALIAS_RTNL_LINK("bridge");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| americo wang | americo wang | 419 | 45.35% | 2 | 5.56% |
| jiri pirko | jiri pirko | 198 | 21.43% | 2 | 5.56% |
| stephen hemminger | stephen hemminger | 93 | 10.06% | 9 | 25.00% |
| pre-git | pre-git | 61 | 6.60% | 7 | 19.44% |
| alexey dobriyan | alexey dobriyan | 40 | 4.33% | 1 | 2.78% |
| patrick mchardy | patrick mchardy | 22 | 2.38% | 1 | 2.78% |
| florian westphal | florian westphal | 17 | 1.84% | 1 | 2.78% |
| michal miroslaw | michal miroslaw | 17 | 1.84% | 1 | 2.78% |
| thomas graf | thomas graf | 15 | 1.62% | 1 | 2.78% |
| pablo neira ayuso | pablo neira ayuso | 10 | 1.08% | 1 | 2.78% |
| akinobu mita | akinobu mita | 8 | 0.87% | 1 | 2.78% |
| pavel emelianov | pavel emelianov | 6 | 0.65% | 1 | 2.78% |
| linus torvalds | linus torvalds | 5 | 0.54% | 1 | 2.78% |
| lennert buytenhek | lennert buytenhek | 3 | 0.32% | 1 | 2.78% |
| bodo stroesser | bodo stroesser | 2 | 0.22% | 1 | 2.78% |
| igor maravic | igor maravic | 2 | 0.22% | 1 | 2.78% |
| jesper dangaard brouer | jesper dangaard brouer | 2 | 0.22% | 1 | 2.78% |
| bart de schuymer | bart de schuymer | 2 | 0.22% | 1 | 2.78% |
| adrian bunk | adrian bunk | 1 | 0.11% | 1 | 2.78% |
| ido schimmel | ido schimmel | 1 | 0.11% | 1 | 2.78% |
| Total | 924 | 100.00% | 36 | 100.00% |
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