Release 4.11 net/bridge/br_fdb.c

/*
 *      Forwarding database
 *      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/kernel.h>
#include <linux/init.h>
#include <linux/rculist.h>
#include <linux/spinlock.h>
#include <linux/times.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/jhash.h>
#include <linux/random.h>
#include <linux/slab.h>
#include <linux/atomic.h>
#include <asm/unaligned.h>
#include <linux/if_vlan.h>
#include <net/switchdev.h>
#include "br_private.h"


static struct kmem_cache *br_fdb_cache __read_mostly;
static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
		      const unsigned char *addr, u16 vid);
static void fdb_notify(struct net_bridge *br,
		       const struct net_bridge_fdb_entry *, int);


static u32 fdb_salt __read_mostly;



int __init br_fdb_init(void)
{
	br_fdb_cache = kmem_cache_create("bridge_fdb_cache",
					 sizeof(struct net_bridge_fdb_entry),
					 0,
					 SLAB_HWCACHE_ALIGN, NULL);
	if (!br_fdb_cache)
		return -ENOMEM;

	get_random_bytes(&fdb_salt, sizeof(fdb_salt));
	return 0;
}

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13
26.00%
1
33.33%
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50
100.00%
3
100.00%



void br_fdb_fini(void)
{
	kmem_cache_destroy(br_fdb_cache);
}


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/* if topology_changing then use forward_delay (default 15 sec)
 * otherwise keep longer (default 5 minutes)
 */


static inline unsigned long hold_time(const struct net_bridge *br)
{
	return br->topology_change ? br->forward_delay : br->ageing_time;
}

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Stephen Hemminger
9
33.33%
2
66.67%
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27
100.00%
3
100.00%



static inline int has_expired(const struct net_bridge *br,
				  const struct net_bridge_fdb_entry *fdb)
{
	return !fdb->is_static && !fdb->added_by_external_learn &&
		time_before_eq(fdb->updated + hold_time(br), jiffies);
}

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30
68.18%
1
20.00%
Stephen Hemminger
9
20.45%
3
60.00%
Roopa Prabhu
5
11.36%
1
20.00%
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44
100.00%
5
100.00%



static inline int br_mac_hash(const unsigned char *mac, __u16 vid)
{
	/* use 1 byte of OUI and 3 bytes of NIC */
	u32 key = get_unaligned((u32 *)(mac + 2));
	return jhash_2words(key, vid, fdb_salt) & (BR_HASH_SIZE - 1);
}

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Stephen Hemminger
23
46.94%
3
60.00%
Linus Torvalds (pre-git)
19
38.78%
1
20.00%
Vlad Yasevich
7
14.29%
1
20.00%
Total
49
100.00%
5
100.00%



static void fdb_rcu_free(struct rcu_head *head)
{
	struct net_bridge_fdb_entry *ent
		= container_of(head, struct net_bridge_fdb_entry, rcu);
	kmem_cache_free(br_fdb_cache, ent);
}

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33
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1
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static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head,
						 const unsigned char *addr,
						 __u16 vid)
{
	struct net_bridge_fdb_entry *f;

	WARN_ON_ONCE(!rcu_read_lock_held());

	hlist_for_each_entry_rcu(f, head, hlist)
		if (ether_addr_equal(f->addr.addr, addr) && f->vlan_id == vid)
			break;

	return f;
}

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65
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2
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/* requires bridge hash_lock */


static struct net_bridge_fdb_entry *br_fdb_find(struct net_bridge *br,
						const unsigned char *addr,
						__u16 vid)
{
	struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)];
	struct net_bridge_fdb_entry *fdb;

	lockdep_assert_held_once(&br->hash_lock);

	rcu_read_lock();
	fdb = fdb_find_rcu(head, addr, vid);
	rcu_read_unlock();

	return fdb;
}

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69
94.52%
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66.67%
Américo Wang
4
5.48%
1
33.33%
Total
73
100.00%
3
100.00%



struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
					     const unsigned char *addr,
					     __u16 vid)
{
	struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)];

	return fdb_find_rcu(head, addr, vid);
}

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Nikolay Aleksandrov
49
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49
100.00%
1
100.00%

/* When a static FDB entry is added, the mac address from the entry is
 * added to the bridge private HW address list and all required ports
 * are then updated with the new information.
 * Called under RTNL.
 */


static void fdb_add_hw_addr(struct net_bridge *br, const unsigned char *addr)
{
	int err;
	struct net_bridge_port *p;

	ASSERT_RTNL();

	list_for_each_entry(p, &br->port_list, list) {
		if (!br_promisc_port(p)) {
			err = dev_uc_add(p->dev, addr);
			if (err)
				goto undo;
		}
	}

	return;
undo:
	list_for_each_entry_continue_reverse(p, &br->port_list, list) {
		if (!br_promisc_port(p))
			dev_uc_del(p->dev, addr);
	}
}

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Vlad Yasevich
91
94.79%
1
33.33%
Li RongQing
4
4.17%
1
33.33%
Jiri Pirko
1
1.04%
1
33.33%
Total
96
100.00%
3
100.00%

/* When a static FDB entry is deleted, the HW address from that entry is
 * also removed from the bridge private HW address list and updates all
 * the ports with needed information.
 * Called under RTNL.
 */


static void fdb_del_hw_addr(struct net_bridge *br, const unsigned char *addr)
{
	struct net_bridge_port *p;

	ASSERT_RTNL();

	list_for_each_entry(p, &br->port_list, list) {
		if (!br_promisc_port(p))
			dev_uc_del(p->dev, addr);
	}
}

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51
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50.00%
Jiri Pirko
1
1.92%
1
50.00%
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52
100.00%
2
100.00%



static void fdb_del_external_learn(struct net_bridge_fdb_entry *f)
{
	struct switchdev_obj_port_fdb fdb = {
		.obj = {
			.orig_dev = f->dst->dev,
			.id = SWITCHDEV_OBJ_ID_PORT_FDB,
			.flags = SWITCHDEV_F_DEFER,
                },
		.vid = f->vlan_id,
        };

	ether_addr_copy(fdb.addr, f->addr.addr);
	switchdev_port_obj_del(f->dst->dev, &fdb.obj);
}

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Scott Feldman
33
44.00%
1
12.50%
Jiri Pirko
31
41.33%
5
62.50%
Ido Schimmel
9
12.00%
1
12.50%
Vivien Didelot
2
2.67%
1
12.50%
Total
75
100.00%
8
100.00%



static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f)
{
	if (f->is_static)
		fdb_del_hw_addr(br, f->addr.addr);

	if (f->added_by_external_learn)
		fdb_del_external_learn(f);

	hlist_del_init_rcu(&f->hlist);
	fdb_notify(br, f, RTM_DELNEIGH);
	call_rcu(&f->rcu, fdb_rcu_free);
}

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Stephen Hemminger
36
50.70%
2
28.57%
Vlad Yasevich
16
22.54%
1
14.29%
Scott Feldman
11
15.49%
1
14.29%
Michał Mirosław
6
8.45%
1
14.29%
Jiri Pirko
1
1.41%
1
14.29%
Nikolay Aleksandrov
1
1.41%
1
14.29%
Total
71
100.00%
7
100.00%

/* Delete a local entry if no other port had the same address. */


static void fdb_delete_local(struct net_bridge *br,
			     const struct net_bridge_port *p,
			     struct net_bridge_fdb_entry *f)
{
	const unsigned char *addr = f->addr.addr;
	struct net_bridge_vlan_group *vg;
	const struct net_bridge_vlan *v;
	struct net_bridge_port *op;
	u16 vid = f->vlan_id;

	/* Maybe another port has same hw addr? */
	list_for_each_entry(op, &br->port_list, list) {
		vg = nbp_vlan_group(op);
		if (op != p && ether_addr_equal(op->dev->dev_addr, addr) &&
		    (!vid || br_vlan_find(vg, vid))) {
			f->dst = op;
			f->added_by_user = 0;
			return;
		}
	}

	vg = br_vlan_group(br);
	v = br_vlan_find(vg, vid);
	/* Maybe bridge device has same hw addr? */
	if (p && ether_addr_equal(br->dev->dev_addr, addr) &&
	    (!vid || (v && br_vlan_should_use(v)))) {
		f->dst = NULL;
		f->added_by_user = 0;
		return;
	}

	fdb_delete(br, f);
}

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140
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47
25.13%
1
33.33%
Total
187
100.00%
3
100.00%



void br_fdb_find_delete_local(struct net_bridge *br,
			      const struct net_bridge_port *p,
			      const unsigned char *addr, u16 vid)
{
	struct net_bridge_fdb_entry *f;

	spin_lock_bh(&br->hash_lock);
	f = br_fdb_find(br, addr, vid);
	if (f && f->is_local && !f->added_by_user && f->dst == p)
		fdb_delete_local(br, p, f);
	spin_unlock_bh(&br->hash_lock);
}

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2
2.35%
1
50.00%
Total
85
100.00%
2
100.00%



void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr)
{
	struct net_bridge_vlan_group *vg;
	struct net_bridge *br = p->br;
	struct net_bridge_vlan *v;
	int i;

	spin_lock_bh(&br->hash_lock);

	vg = nbp_vlan_group(p);
	/* Search all chains since old address/hash is unknown */
	for (i = 0; i < BR_HASH_SIZE; i++) {
		struct hlist_node *h;
		hlist_for_each(h, &br->hash[i]) {
			struct net_bridge_fdb_entry *f;

			f = hlist_entry(h, struct net_bridge_fdb_entry, hlist);
			if (f->dst == p && f->is_local && !f->added_by_user) {
				/* delete old one */
				fdb_delete_local(br, p, f);

				/* if this port has no vlan information
                                 * configured, we can safely be done at
                                 * this point.
                                 */
				if (!vg || !vg->num_vlans)
					goto insert;
			}
		}
	}

insert:
	/* insert new address,  may fail if invalid address or dup. */
	fdb_insert(br, p, newaddr, 0);

	if (!vg || !vg->num_vlans)
		goto done;

	/* Now add entries for every VLAN configured on the port.
         * This function runs under RTNL so the bitmap will not change
         * from under us.
         */
	list_for_each_entry(v, &vg->vlan_list, vlist)
		fdb_insert(br, p, newaddr, v->vid);

done:
	spin_unlock_bh(&br->hash_lock);
}

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71
35.32%
1
8.33%
Stephen Hemminger
48
23.88%
6
50.00%
Toshiaki Makita
38
18.91%
3
25.00%
Nikolay Aleksandrov
34
16.92%
1
8.33%
Vlad Yasevich
10
4.98%
1
8.33%
Total
201
100.00%
12
100.00%



void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr)
{
	struct net_bridge_vlan_group *vg;
	struct net_bridge_fdb_entry *f;
	struct net_bridge_vlan *v;

	spin_lock_bh(&br->hash_lock);

	/* If old entry was unassociated with any port, then delete it. */
	f = br_fdb_find(br, br->dev->dev_addr, 0);
	if (f && f->is_local && !f->dst && !f->added_by_user)
		fdb_delete_local(br, NULL, f);

	fdb_insert(br, NULL, newaddr, 0);
	vg = br_vlan_group(br);
	if (!vg || !vg->num_vlans)
		goto out;
	/* Now remove and add entries for every VLAN configured on the
         * bridge.  This function runs under RTNL so the bitmap will not
         * change from under us.
         */
	list_for_each_entry(v, &vg->vlan_list, vlist) {
		if (!br_vlan_should_use(v))
			continue;
		f = br_fdb_find(br, br->dev->dev_addr, v->vid);
		if (f && f->is_local && !f->dst && !f->added_by_user)
			fdb_delete_local(br, NULL, f);
		fdb_insert(br, NULL, newaddr, v->vid);
	}
out:
	spin_unlock_bh(&br->hash_lock);
}

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Vlad Yasevich
66
33.17%
2
22.22%
Stephen Hemminger
61
30.65%
1
11.11%
Toshiaki Makita
46
23.12%
4
44.44%
Nikolay Aleksandrov
26
13.07%
2
22.22%
Total
199
100.00%
9
100.00%



void br_fdb_cleanup(struct work_struct *work)
{
	struct net_bridge *br = container_of(work, struct net_bridge,
					     gc_work.work);
	unsigned long delay = hold_time(br);
	unsigned long work_delay = delay;
	unsigned long now = jiffies;
	int i;

	for (i = 0; i < BR_HASH_SIZE; i++) {
		struct net_bridge_fdb_entry *f;
		struct hlist_node *n;

		if (!br->hash[i].first)
			continue;

		spin_lock_bh(&br->hash_lock);
		hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) {
			unsigned long this_timer;

			if (f->is_static)
				continue;
			if (f->added_by_external_learn)
				continue;
			this_timer = f->updated + delay;
			if (time_after(this_timer, now))
				work_delay = min(work_delay, this_timer - now);
			else
				fdb_delete(br, f);
		}
		spin_unlock_bh(&br->hash_lock);
		cond_resched();
	}

	/* Cleanup minimum 10 milliseconds apart */
	work_delay = max_t(unsigned long, work_delay, msecs_to_jiffies(10));
	mod_delayed_work(system_long_wq, &br->gc_work, work_delay);
}

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Nikolay Aleksandrov
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9.09%
Stephen Hemminger
55
27.50%
5
45.45%
Linus Torvalds (pre-git)
36
18.00%
1
9.09%
Baruch Even
19
9.50%
1
9.09%
Siva Mannem
7
3.50%
1
9.09%
Fabio Checconi
3
1.50%
1
9.09%
Andrew Morton
2
1.00%
1
9.09%
Total
200
100.00%
11
100.00%

/* Completely flush all dynamic entries in forwarding database.*/


void br_fdb_flush(struct net_bridge *br)
{
	int i;

	spin_lock_bh(&br->hash_lock);
	for (i = 0; i < BR_HASH_SIZE; i++) {
		struct net_bridge_fdb_entry *f;
		struct hlist_node *n;
		hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) {
			if (!f->is_static)
				fdb_delete(br, f);
		}
	}
	spin_unlock_bh(&br->hash_lock);
}

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80
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2
100.00%

/* Flush all entries referring to a specific port.
 * if do_all is set also flush static entries
 * if vid is set delete all entries that match the vlan_id
 */


void br_fdb_delete_by_port(struct net_bridge *br,
			   const struct net_bridge_port *p,
			   u16 vid,
			   int do_all)
{
	int i;

	spin_lock_bh(&br->hash_lock);
	for (i = 0; i < BR_HASH_SIZE; i++) {
		struct hlist_node *h, *g;

		hlist_for_each_safe(h, g, &br->hash[i]) {
			struct net_bridge_fdb_entry *f
				= hlist_entry(h, struct net_bridge_fdb_entry, hlist);
			if (f->dst != p)
				continue;

			if (!do_all)
				if (f->is_static || (vid && f->vlan_id != vid))
					continue;

			if (f->is_local)
				fdb_delete_local(br, p, f);
			else
				fdb_delete(br, f);
		}
	}
	spin_unlock_bh(&br->hash_lock);
}

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Linus Torvalds (pre-git)
67
46.85%
1
12.50%
Stephen Hemminger
56
39.16%
5
62.50%
Nikolay Aleksandrov
17
11.89%
1
12.50%
Toshiaki Makita
3
2.10%
1
12.50%
Total
143
100.00%
8
100.00%

#if IS_ENABLED(CONFIG_ATM_LANE)
/* Interface used by ATM LANE hook to test
 * if an addr is on some other bridge port */


int br_fdb_test_addr(struct net_device *dev, unsigned char *addr)
{
	struct net_bridge_fdb_entry *fdb;
	struct net_bridge_port *port;
	int ret;

	rcu_read_lock();
	port = br_port_get_rcu(dev);
	if (!port)
		ret = 0;
	else {
		fdb = br_fdb_find_rcu(port->br, addr, 0);
		ret = fdb && fdb->dst && fdb->dst->dev != dev &&
			fdb->dst->state == BR_STATE_FORWARDING;
	}
	rcu_read_unlock();

	return ret;
}
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49
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3
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Michał Mirosław
26
27.96%
1
11.11%
Linus Torvalds (pre-git)
11
11.83%
1
11.11%
Vlad Yasevich
2
2.15%
1
11.11%
Patrick McHardy
2
2.15%
1
11.11%
Jiri Pirko
2
2.15%
1
11.11%
Nikolay Aleksandrov
1
1.08%
1
11.11%
Total
93
100.00%
9
100.00%

#endif /* CONFIG_ATM_LANE */

/*
 * Fill buffer with forwarding table records in
 * the API format.
 */


int br_fdb_fillbuf(struct net_bridge *br, void *buf,
		   unsigned long maxnum, unsigned long skip)
{
	struct __fdb_entry *fe = buf;
	int i, num = 0;
	struct net_bridge_fdb_entry *f;

	memset(buf, 0, maxnum*sizeof(struct __fdb_entry));

	rcu_read_lock();
	for (i = 0; i < BR_HASH_SIZE; i++) {
		hlist_for_each_entry_rcu(f, &br->hash[i], hlist) {
			if (num >= maxnum)
				goto out;

			if (has_expired(br, f))
				continue;

			/* ignore pseudo entry for local MAC address */
			if (!f->dst)
				continue;

			if (skip) {
				--skip;
				continue;
			}

			/* convert from internal format to API */
			memcpy(fe->mac_addr, f->addr.addr, ETH_ALEN);

			/* due to ABI compat need to split into hi/lo */
			fe->port_no = f->dst->port_no;
			fe->port_hi = f->dst->port_no >> 8;

			fe->is_local = f->is_local;
			if (!f->is_static)
				fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated);
			++fe;
			++num;
		}
	}

 out:
	rcu_read_unlock();

	return num;
}

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Stephen Hemminger
119
58.62%
7
70.00%
Linus Torvalds (pre-git)
83
40.89%
2
20.00%
Eric Dumazet
1
0.49%
1
10.00%
Total
203
100.00%
10
100.00%



static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head,
					       struct net_bridge_port *source,
					       const unsigned char *addr,
					       __u16 vid,
					       unsigned char is_local,
					       unsigned char is_static)
{
	struct net_bridge_fdb_entry *fdb;

	fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC);
	if (fdb) {
		memcpy(fdb->addr.addr, addr, ETH_ALEN);
		fdb->dst = source;
		fdb->vlan_id = vid;
		fdb->is_local = is_local;
		fdb->is_static = is_static;
		fdb->added_by_user = 0;
		fdb->added_by_external_learn = 0;
		fdb->updated = fdb->used = jiffies;
		hlist_add_head_rcu(&fdb->hlist, head);
	}
	return fdb;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
46
36.22%
1
10.00%
Stephen Hemminger
40
31.50%
4
40.00%
Pavel Emelyanov
10
7.87%
1
10.00%
Roopa Prabhu
10
7.87%
1
10.00%
Vlad Yasevich
9
7.09%
1
10.00%
Scott Feldman
6
4.72%
1
10.00%
Toshiaki Makita
6
4.72%
1
10.00%
Total
127
100.00%
10
100.00%



static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
		  const unsigned char *addr, u16 vid)
{
	struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)];
	struct net_bridge_fdb_entry *fdb;

	if (!is_valid_ether_addr(addr))
		return -EINVAL;

	fdb = br_fdb_find(br, addr, vid);
	if (fdb) {
		/* it is okay to have multiple ports with same
                 * address, just use the first one.
                 */
		if (fdb->is_local)
			return 0;
		br_warn(br, "adding interface %s with same address as a received packet (addr:%pM, vlan:%u)\n",
		       source ? source->dev->name : br->dev->name, addr, vid);
		fdb_delete(br, fdb);
	}

	fdb = fdb_create(head, source, addr, vid, 1, 1);
	if (!fdb)
		return -ENOMEM;

	fdb_add_hw_addr(br, addr);
	fdb_notify(br, fdb, RTM_NEWNEIGH);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Stephen Hemminger
128
78.05%
6
40.00%
Vlad Yasevich
15
9.15%
3
20.00%
Roopa Prabhu
9
5.49%
2
13.33%
Hong Zhi Guo
8
4.88%
1
6.67%
Nikolay Aleksandrov
2
1.22%
1
6.67%
Hideaki Yoshifuji / 吉藤英明
1
0.61%
1
6.67%
Jiri Pirko
1
0.61%
1
6.67%
Total
164
100.00%
15
100.00%

/* Add entry for local address of interface */


int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
		  const unsigned char *addr, u16 vid)
{
	int ret;

	spin_lock_bh(&br->hash_lock);
	ret = fdb_insert(br, source, addr, vid);
	spin_unlock_bh(&br->hash_lock);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Stephen Hemminger
46
77.97%
3
60.00%
Linus Torvalds (pre-git)
8
13.56%
1
20.00%
Vlad Yasevich
5
8.47%
1
20.00%
Total
59
100.00%
5
100.00%



void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
		   const unsigned char *addr, u16 vid, bool added_by_user)
{
	struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)];
	struct net_bridge_fdb_entry *fdb;
	bool fdb_modified = false;

	/* some users want to always flood. */
	if (hold_time(br) == 0)
		return;

	/* ignore packets unless we are using this port */
	if (!(source->state == BR_STATE_LEARNING ||
	      source->state == BR_STATE_FORWARDING))
		return;

	fdb = fdb_find_rcu(head, addr, vid);
	if (likely(fdb)) {
		/* attempt to update an entry for a local interface */
		if (unlikely(fdb->is_local)) {
			if (net_ratelimit())
				br_warn(br, "received packet on %s with own address as source address (addr:%pM, vlan:%u)\n",
					source->dev->name, addr, vid);
		} else {
			unsigned long now = jiffies;

			/* fastpath: update of existing entry */
			if (unlikely(source != fdb->dst)) {
				fdb->dst = source;
				fdb_modified = true;
			}
			if (now != fdb->updated)
				fdb->updated = now;
			if (unlikely(added_by_user))
				fdb->added_by_user = 1;
			if (unlikely(fdb_modified))
				fdb_notify(br, fdb, RTM_NEWNEIGH);
		}
	} else {
		spin_lock(&br->hash_lock);
		if (likely(!fdb_find_rcu(head, addr, vid))) {
			fdb = fdb_create(head, source, addr, vid, 0, 0);
			if (fdb) {
				if (unlikely(added_by_user))
					fdb->added_by_user = 1;
				fdb_notify(br, fdb, RTM_NEWNEIGH);
			}
		}
		/* else  we lose race and someone else inserts
                 * it first, don't bother updating
                 */
		spin_unlock(&br->hash_lock);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Stephen Hemminger
200
67.34%
11
61.11%
Jon Maxwell
38
12.79%
1
5.56%
Toshiaki Makita
31
10.44%
1
5.56%
Vlad Yasevich
11
3.70%
1
5.56%
Roopa Prabhu
9
3.03%
2
11.11%
Nikolay Aleksandrov
8
2.69%
2
11.11%
Total
297
100.00%
18
100.00%



static int fdb_to_nud(const struct net_bridge *br,
		      const struct net_bridge_fdb_entry *fdb)
{
	if (fdb->is_local)
		return NUD_PERMANENT;
	else if (fdb->is_static)
		return NUD_NOARP;
	else if (has_expired(br, fdb))
		return NUD_STALE;
	else
		return NUD_REACHABLE;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Stephen Hemminger
48
88.89%
1
50.00%
Roopa Prabhu
6
11.11%
1
50.00%
Total
54
100.00%
2
100.00%



static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br,
			 const struct net_bridge_fdb_entry