Release 4.11 net/core/neighbour.c

Directory: net/core
/*
 *      Generic address resolution entity
 *
 *      Authors:
 *      Pedro Roque             <roque@di.fc.ul.pt>
 *      Alexey Kuznetsov        <kuznet@ms2.inr.ac.ru>
 *
 *      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.
 *
 *      Fixes:
 *      Vitaly E. Lavrov        releasing NULL neighbor in neigh_add.
 *      Harald Welte            Add neighbour cache statistics like rtstat
 */


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/slab.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/socket.h>
#include <linux/netdevice.h>
#include <linux/proc_fs.h>
#ifdef CONFIG_SYSCTL
#include <linux/sysctl.h>
#endif
#include <linux/times.h>
#include <net/net_namespace.h>
#include <net/neighbour.h>
#include <net/dst.h>
#include <net/sock.h>
#include <net/netevent.h>
#include <net/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/random.h>
#include <linux/string.h>
#include <linux/log2.h>
#include <linux/inetdevice.h>
#include <net/addrconf.h>


#define DEBUG

#define NEIGH_DEBUG 1

#define neigh_dbg(level, fmt, ...)		\
do {                                            \
        if (level <= NEIGH_DEBUG)               \
                pr_debug(fmt, ##__VA_ARGS__);   \
} while (0)


#define PNEIGH_HASHMASK		0xF

static void neigh_timer_handler(unsigned long arg);
static void __neigh_notify(struct neighbour *n, int type, int flags);
static void neigh_update_notify(struct neighbour *neigh);
static int pneigh_ifdown(struct neigh_table *tbl, struct net_device *dev);

#ifdef CONFIG_PROC_FS

static const struct file_operations neigh_stat_seq_fops;
#endif

/*
   Neighbour hash table buckets are protected with rwlock tbl->lock.

   - All the scans/updates to hash buckets MUST be made under this lock.
   - NOTHING clever should be made under this lock: no callbacks
     to protocol backends, no attempts to send something to network.
     It will result in deadlocks, if backend/driver wants to use neighbour
     cache.
   - If the entry requires some non-trivial actions, increase
     its reference count and release table lock.

   Neighbour entries are protected:
   - with reference count.
   - with rwlock neigh->lock

   Reference count prevents destruction.

   neigh->lock mainly serializes ll address data and its validity state.
   However, the same lock is used to protect another entry fields:
    - timer
    - resolution queue

   Again, nothing clever shall be made under neigh->lock,
   the most complicated procedure, which we allow is dev->hard_header.
   It is supposed, that dev->hard_header is simplistic and does
   not make callbacks to neighbour tables.
 */



static int neigh_blackhole(struct neighbour *neigh, struct sk_buff *skb)
{
	kfree_skb(skb);
	return -ENETDOWN;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 20 80.00% 2 66.67%
David S. Miller 5 20.00% 1 33.33%
Total 25 100.00% 3 100.00%



static void neigh_cleanup_and_release(struct neighbour *neigh)
{
	if (neigh->parms->neigh_cleanup)
		neigh->parms->neigh_cleanup(neigh);

	__neigh_notify(neigh, RTM_DELNEIGH, 0);
	call_netevent_notifiers(NETEVENT_NEIGH_UPDATE, neigh);
	neigh_release(neigh);
}

Contributors
Person Tokens Prop Commits CommitProp
Thomas Graf 42 85.71% 2 66.67%
Ido Schimmel 7 14.29% 1 33.33%
Total 49 100.00% 3 100.00%

/*
 * It is random distribution in the interval (1/2)*base...(3/2)*base.
 * It corresponds to default IPv6 settings and is not overridable,
 * because it is really reasonable choice.
 */



unsigned long neigh_rand_reach_time(unsigned long base)
{
	return base ? (prandom_u32() % base) + (base >> 1) : 0;
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 22 78.57% 1 33.33%
Hideaki Yoshifuji / 吉藤英明 5 17.86% 1 33.33%
Aruna-Hewapathirane 1 3.57% 1 33.33%
Total 28 100.00% 3 100.00%


EXPORT_SYMBOL(neigh_rand_reach_time);




static int neigh_forced_gc(struct neigh_table *tbl)
{
	int shrunk = 0;
	int i;
	struct neigh_hash_table *nht;

	NEIGH_CACHE_STAT_INC(tbl, forced_gc_runs);

	write_lock_bh(&tbl->lock);
	nht = rcu_dereference_protected(tbl->nht,
					lockdep_is_held(&tbl->lock));
	for (i = 0; i < (1 << nht->hash_shift); i++) {
		struct neighbour *n;
		struct neighbour __rcu **np;

		np = &nht->hash_buckets[i];
		while ((n = rcu_dereference_protected(*np,
					lockdep_is_held(&tbl->lock))) != NULL) {
			/* Neighbour record may be discarded if:
                         * - nobody refers to it.
                         * - it is not permanent
                         */
			write_lock(&n->lock);
			if (atomic_read(&n->refcnt) == 1 &&
			    !(n->nud_state & NUD_PERMANENT)) {
				rcu_assign_pointer(*np,
					rcu_dereference_protected(n->next,
						  lockdep_is_held(&tbl->lock)));
				n->dead = 1;
				shrunk	= 1;
				write_unlock(&n->lock);
				neigh_cleanup_and_release(n);
				continue;
			}
			write_unlock(&n->lock);
			np = &n->next;
		}
	}

	tbl->last_flush = jiffies;

	write_unlock_bh(&tbl->lock);

	return shrunk;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 147 63.36% 4 33.33%
Eric Dumazet 54 23.28% 2 16.67%
David S. Miller 30 12.93% 5 41.67%
Thomas Graf 1 0.43% 1 8.33%
Total 232 100.00% 12 100.00%



static void neigh_add_timer(struct neighbour *n, unsigned long when)
{
	neigh_hold(n);
	if (unlikely(mod_timer(&n->timer, when))) {
		printk("NEIGH: BUG, double timer add, state is %x\n",
		       n->nud_state);
		dump_stack();
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Pavel Emelyanov 49 100.00% 1 100.00%
Total 49 100.00% 1 100.00%



static int neigh_del_timer(struct neighbour *n)
{
	if ((n->nud_state & NUD_IN_TIMER) &&
	    del_timer(&n->timer)) {
		neigh_release(n);
		return 1;
	}
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 39 92.86% 1 50.00%
Arnaldo Carvalho de Melo 3 7.14% 1 50.00%
Total 42 100.00% 2 100.00%



static void pneigh_queue_purge(struct sk_buff_head *list)
{
	struct sk_buff *skb;

	while ((skb = skb_dequeue(list)) != NULL) {
		dev_put(skb->dev);
		kfree_skb(skb);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 43 100.00% 1 100.00%
Total 43 100.00% 1 100.00%



static void neigh_flush_dev(struct neigh_table *tbl, struct net_device *dev)
{
	int i;
	struct neigh_hash_table *nht;

	nht = rcu_dereference_protected(tbl->nht,
					lockdep_is_held(&tbl->lock));

	for (i = 0; i < (1 << nht->hash_shift); i++) {
		struct neighbour *n;
		struct neighbour __rcu **np = &nht->hash_buckets[i];

		while ((n = rcu_dereference_protected(*np,
					lockdep_is_held(&tbl->lock))) != NULL) {
			if (dev && n->dev != dev) {
				np = &n->next;
				continue;
			}
			rcu_assign_pointer(*np,
				   rcu_dereference_protected(n->next,
						lockdep_is_held(&tbl->lock)));
			write_lock(&n->lock);
			neigh_del_timer(n);
			n->dead = 1;

			if (atomic_read(&n->refcnt) != 1) {
				/* The most unpleasant situation.
                                   We must destroy neighbour entry,
                                   but someone still uses it.

                                   The destroy will be delayed until
                                   the last user releases us, but
                                   we must kill timers etc. and move
                                   it to safe state.
                                 */
				__skb_queue_purge(&n->arp_queue);
				n->arp_queue_len_bytes = 0;
				n->output = neigh_blackhole;
				if (n->nud_state & NUD_VALID)
					n->nud_state = NUD_NOARP;
				else
					n->nud_state = NUD_NONE;
				neigh_dbg(2, "neigh %p is stray\n", n);
			}
			write_unlock(&n->lock);
			neigh_cleanup_and_release(n);
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 165 67.62% 6 35.29%
Eric Dumazet 61 25.00% 4 23.53%
David S. Miller 7 2.87% 2 11.76%
Joe Perches 4 1.64% 1 5.88%
Herbert Xu 3 1.23% 1 5.88%
Arnaldo Carvalho de Melo 2 0.82% 1 5.88%
Tommi Virtanen 1 0.41% 1 5.88%
Thomas Graf 1 0.41% 1 5.88%
Total 244 100.00% 17 100.00%



void neigh_changeaddr(struct neigh_table *tbl, struct net_device *dev)
{
	write_lock_bh(&tbl->lock);
	neigh_flush_dev(tbl, dev);
	write_unlock_bh(&tbl->lock);
}
Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 38 100.00% 1 100.00%
Total 38 100.00% 1 100.00%


EXPORT_SYMBOL(neigh_changeaddr);



int neigh_ifdown(struct neigh_table *tbl, struct net_device *dev)
{
	write_lock_bh(&tbl->lock);
	neigh_flush_dev(tbl, dev);
	pneigh_ifdown(tbl, dev);
	write_unlock_bh(&tbl->lock);

	del_timer_sync(&tbl->proxy_timer);
	pneigh_queue_purge(&tbl->proxy_queue);
	return 0;
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 35 54.69% 6 85.71%
Herbert Xu 29 45.31% 1 14.29%
Total 64 100.00% 7 100.00%


EXPORT_SYMBOL(neigh_ifdown);



static struct neighbour *neigh_alloc(struct neigh_table *tbl, struct net_device *dev)
{
	struct neighbour *n = NULL;
	unsigned long now = jiffies;
	int entries;

	entries = atomic_inc_return(&tbl->entries) - 1;
	if (entries >= tbl->gc_thresh3 ||
	    (entries >= tbl->gc_thresh2 &&
	     time_after(now, tbl->last_flush + 5 * HZ))) {
		if (!neigh_forced_gc(tbl) &&
		    entries >= tbl->gc_thresh3) {
			net_info_ratelimited("%s: neighbor table overflow!\n",
					     tbl->id);
			NEIGH_CACHE_STAT_INC(tbl, table_fulls);
			goto out_entries;
		}
	}

	n = kzalloc(tbl->entry_size + dev->neigh_priv_len, GFP_ATOMIC);
	if (!n)
		goto out_entries;

	__skb_queue_head_init(&n->arp_queue);
	rwlock_init(&n->lock);
	seqlock_init(&n->ha_lock);
	n->updated	  = n->used = now;
	n->nud_state	  = NUD_NONE;
	n->output	  = neigh_blackhole;
	seqlock_init(&n->hh.hh_lock);
	n->parms	  = neigh_parms_clone(&tbl->parms);
	setup_timer(&n->timer, neigh_timer_handler, (unsigned long)n);

	NEIGH_CACHE_STAT_INC(tbl, allocs);
	n->tbl		  = tbl;
	atomic_set(&n->refcnt, 1);
	n->dead		  = 1;
out:
	return n;

out_entries:
	atomic_dec(&tbl->entries);
	goto out;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 151 56.77% 5 27.78%
Herbert Xu 36 13.53% 2 11.11%
David S. Miller 29 10.90% 4 22.22%
Rick Jones 18 6.77% 1 5.56%
Arnaldo Carvalho de Melo 10 3.76% 1 5.56%
Eric Dumazet 9 3.38% 2 11.11%
Hideaki Yoshifuji / 吉藤英明 5 1.88% 1 5.56%
Andrew Morton 4 1.50% 1 5.56%
Pavel Emelyanov 4 1.50% 1 5.56%
Total 266 100.00% 18 100.00%



static void neigh_get_hash_rnd(u32 *x)
{
	get_random_bytes(x, sizeof(*x));
	*x |= 1;
}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 26 100.00% 1 100.00%
Total 26 100.00% 1 100.00%



static struct neigh_hash_table *neigh_hash_alloc(unsigned int shift)
{
	size_t size = (1 << shift) * sizeof(struct neighbour *);
	struct neigh_hash_table *ret;
	struct neighbour __rcu **buckets;
	int i;

	ret = kmalloc(sizeof(*ret), GFP_ATOMIC);
	if (!ret)
		return NULL;
	if (size <= PAGE_SIZE)
		buckets = kzalloc(size, GFP_ATOMIC);
	else
		buckets = (struct neighbour __rcu **)
			  __get_free_pages(GFP_ATOMIC | __GFP_ZERO,
					   get_order(size));
	if (!buckets) {
		kfree(ret);
		return NULL;
	}
	ret->hash_buckets = buckets;
	ret->hash_shift = shift;
	for (i = 0; i < NEIGH_NUM_HASH_RND; i++)
		neigh_get_hash_rnd(&ret->hash_rnd[i]);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 88 56.77% 4 57.14%
Eric Dumazet 64 41.29% 2 28.57%
Andrew Morton 3 1.94% 1 14.29%
Total 155 100.00% 7 100.00%



static void neigh_hash_free_rcu(struct rcu_head *head)
{
	struct neigh_hash_table *nht = container_of(head,
						    struct neigh_hash_table,
						    rcu);
	size_t size = (1 << nht->hash_shift) * sizeof(struct neighbour *);
	struct neighbour __rcu **buckets = nht->hash_buckets;

	if (size <= PAGE_SIZE)
		kfree(buckets);
	else
		free_pages((unsigned long)buckets, get_order(size));
	kfree(nht);
}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 45 52.33% 2 50.00%
Eric Dumazet 41 47.67% 2 50.00%
Total 86 100.00% 4 100.00%



static struct neigh_hash_table *neigh_hash_grow(struct neigh_table *tbl,
						unsigned long new_shift)
{
	unsigned int i, hash;
	struct neigh_hash_table *new_nht, *old_nht;

	NEIGH_CACHE_STAT_INC(tbl, hash_grows);

	old_nht = rcu_dereference_protected(tbl->nht,
					    lockdep_is_held(&tbl->lock));
	new_nht = neigh_hash_alloc(new_shift);
	if (!new_nht)
		return old_nht;

	for (i = 0; i < (1 << old_nht->hash_shift); i++) {
		struct neighbour *n, *next;

		for (n = rcu_dereference_protected(old_nht->hash_buckets[i],
						   lockdep_is_held(&tbl->lock));
		     n != NULL;
		     n = next) {
			hash = tbl->hash(n->primary_key, n->dev,
					 new_nht->hash_rnd);

			hash >>= (32 - new_nht->hash_shift);
			next = rcu_dereference_protected(n->next,
						lockdep_is_held(&tbl->lock));

			rcu_assign_pointer(n->next,
					   rcu_dereference_protected(
						new_nht->hash_buckets[hash],
						lockdep_is_held(&tbl->lock)));
			rcu_assign_pointer(new_nht->hash_buckets[hash], n);
		}
	}

	rcu_assign_pointer(tbl->nht, new_nht);
	call_rcu(&old_nht->rcu, neigh_hash_free_rcu);
	return new_nht;
}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 124 52.54% 4 66.67%
Eric Dumazet 112 47.46% 2 33.33%
Total 236 100.00% 6 100.00%



struct neighbour *neigh_lookup(struct neigh_table *tbl, const void *pkey,
			       struct net_device *dev)
{
	struct neighbour *n;

	NEIGH_CACHE_STAT_INC(tbl, lookups);

	rcu_read_lock_bh();
	n = __neigh_lookup_noref(tbl, pkey, dev);
	if (n) {
		if (!atomic_inc_not_zero(&n->refcnt))
			n = NULL;
		NEIGH_CACHE_STAT_INC(tbl, hits);
	}

	rcu_read_unlock_bh();
	return n;
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 42 51.22% 4 44.44%
Eric Dumazet 20 24.39% 2 22.22%
David S. Miller 14 17.07% 1 11.11%
Eric W. Biedermann 3 3.66% 1 11.11%
Pavel Emelyanov 3 3.66% 1 11.11%
Total 82 100.00% 9 100.00%


EXPORT_SYMBOL(neigh_lookup);



struct neighbour *neigh_lookup_nodev(struct neigh_table *tbl, struct net *net,
				     const void *pkey)
{
	struct neighbour *n;
	int key_len = tbl->key_len;
	u32 hash_val;
	struct neigh_hash_table *nht;

	NEIGH_CACHE_STAT_INC(tbl, lookups);

	rcu_read_lock_bh();
	nht = rcu_dereference_bh(tbl->nht);
	hash_val = tbl->hash(pkey, NULL, nht->hash_rnd) >> (32 - nht->hash_shift);

	for (n = rcu_dereference_bh(nht->hash_buckets[hash_val]);
	     n != NULL;
	     n = rcu_dereference_bh(n->next)) {
		if (!memcmp(n->primary_key, pkey, key_len) &&
		    net_eq(dev_net(n->dev), net)) {
			if (!atomic_inc_not_zero(&n->refcnt))
				n = NULL;
			NEIGH_CACHE_STAT_INC(tbl, hits);
			break;
		}
	}

	rcu_read_unlock_bh();
	return n;
}
Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 101 59.41% 3 33.33%
Eric Dumazet 43 25.29% 2 22.22%
Eric W. Biedermann 9 5.29% 1 11.11%
Pavel Emelyanov 9 5.29% 1 11.11%
Hideaki Yoshifuji / 吉藤英明 8 4.71% 2 22.22%
Total 170 100.00% 9 100.00%


EXPORT_SYMBOL(neigh_lookup_nodev);



struct neighbour *__neigh_create(struct neigh_table *tbl, const void *pkey,
				 struct net_device *dev, bool want_ref)
{
	u32 hash_val;
	int key_len = tbl->key_len;
	int error;
	struct neighbour *n1, *rc, *n = neigh_alloc(tbl, dev);
	struct neigh_hash_table *nht;

	if (!n) {
		rc = ERR_PTR(-ENOBUFS);
		goto out;
	}

	memcpy(n->primary_key, pkey, key_len);
	n->dev = dev;
	dev_hold(dev);

	/* Protocol specific setup. */
	if (tbl->constructor &&	(error = tbl->constructor(n)) < 0) {
		rc = ERR_PTR(error);
		goto out_neigh_release;
	}

	if (dev->netdev_ops->ndo_neigh_construct) {
		error = dev->netdev_ops->ndo_neigh_construct(dev, n);
		if (error < 0) {
			rc = ERR_PTR(error);
			goto out_neigh_release;
		}
	}

	/* Device specific setup. */
	if (n->parms->neigh_setup &&
	    (error = n->parms->neigh_setup(n)) < 0) {
		rc = ERR_PTR(error);
		goto out_neigh_release;
	}

	n->confirmed = jiffies - (NEIGH_VAR(n->parms, BASE_REACHABLE_TIME) << 1);

	write_lock_bh(&tbl->lock);
	nht = rcu_dereference_protected(tbl->nht,
					lockdep_is_held(&tbl->lock));

	if (atomic_read(&tbl->entries) > (1 << nht->hash_shift))
		nht = neigh_hash_grow(tbl, nht->hash_shift + 1);

	hash_val = tbl->hash(pkey, dev, nht->hash_rnd) >> (32 - nht->hash_shift);

	if (n->parms->dead) {
		rc = ERR_PTR(-EINVAL);
		goto out_tbl_unlock;
	}

	for (n1 = rcu_dereference_protected(nht->hash_buckets[hash_val],
					    lockdep_is_held(&tbl->lock));
	     n1 != NULL;
	     n1 = rcu_dereference_protected(n1->next,
			lockdep_is_held(&tbl->lock))) {
		if (dev == n1->dev && !memcmp(n1->primary_key, pkey, key_len)) {
			if (want_ref)
				neigh_hold(n1);
			rc = n1;
			goto out_tbl_unlock;
		}
	}

	n->dead = 0;
	if (want_ref)
		neigh_hold(n);
	rcu_assign_pointer(n->next,
			   rcu_dereference_protected(nht->hash_buckets[hash_val],
						     lockdep_is_held(&tbl->lock)));
	rcu_assign_pointer(nht->hash_buckets[hash_val], n);
	write_unlock_bh(&tbl->lock);
	neigh_dbg(2, "neigh %p is created\n", n);
	rc = n;
out:
	return rc;
out_tbl_unlock:
	write_unlock_bh(&tbl->lock);
out_neigh_release:
	neigh_release(n);
	goto out;
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 200 39.22% 6 27.27%
David S. Miller 108 21.18% 7 31.82%
Eric Dumazet 87 17.06% 2 9.09%
Herbert Xu 55 10.78% 3 13.64%
Arnaldo Carvalho de Melo 49 9.61% 1 4.55%
Jiri Pirko 7 1.37% 2 9.09%
Joe Perches 4 0.78% 1 4.55%
Total 510 100.00% 22 100.00%


EXPORT_SYMBOL(__neigh_create);



static u32 pneigh_hash(const void *pkey, int key_len)
{
	u32 hash_val = *(u32 *)(pkey + key_len - 4);
	hash_val ^= (hash_val >> 16);
	hash_val ^= hash_val >> 8;
	hash_val ^= hash_val >> 4;
	hash_val &= PNEIGH_HASHMASK;
	return hash_val;
}

Contributors
Person Tokens Prop Commits CommitProp
Pavel Emelyanov 49 85.96% 1 50.00%
Hideaki Yoshifuji / 吉藤英明 8 14.04% 1 50.00%
Total 57 100.00% 2 100.00%



static struct pneigh_entry *__pneigh_lookup_1(struct pneigh_entry *n,
					      struct net *net,
					      const void *pkey,
					      int key_len,
					      struct net_device *dev)
{
	while (n) {
		if (!memcmp(n->key, pkey, key_len) &&
		    net_eq(pneigh_net(n), net) &&
		    (n->dev == dev || !n->dev))
			return n;
		n = n->next;
	}
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 47 54.65% 1 33.33%
Pavel Emelyanov 36 41.86% 1 33.33%
David S. Miller 3 3.49% 1 33.33%
Total 86 100.00% 3 100.00%



struct pneigh_entry *__pneigh_lookup(struct neigh_table *tbl,
		struct net *net, const void *pkey, struct net_device *dev)
{
	int key_len = tbl->key_len;
	u32 hash_val = pneigh_hash(pkey, key_len);

	return __pneigh_lookup_1(tbl->phash_buckets[hash_val],
				 net, pkey, key_len, dev);
}
Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 62 98.41% 1 50.00%
Pavel Emelyanov 1 1.59% 1 50.00%
Total 63 100.00% 2 100.00%


EXPORT_SYMBOL_GPL(__pneigh_lookup);



struct pneigh_entry * pneigh_lookup(struct neigh_table *tbl,
				    struct net *net, const void *pkey,
				    struct net_device *dev, int creat)
{
	struct pneigh_entry *n;
	int key_len = tbl->key_len;
	u32 hash_val = pneigh_hash(pkey, key_len);

	read_lock_bh(&tbl->lock);
	n = __pneigh_lookup_1(tbl->phash_buckets[hash_val],
			      net, pkey, key_len, dev);
	read_unlock_bh(&tbl->lock);

	if (n || !creat)
		goto out;

	ASSERT_RTNL();

	n = kmalloc(sizeof(*n) + key_len, GFP_KERNEL);
	if (!n)
		goto out;

	write_pnet(&n->net, net);
	memcpy(n->key, pkey, key_len);
	n->dev = dev;
	if (dev)
		dev_hold(dev);

	if (tbl->pconstructor && tbl->pconstructor(n)) {
		if (dev)
			dev_put(dev);
		kfree(n);
		n = NULL;
		goto out;
	}

	write_lock_bh(&tbl->lock);
	n->next = tbl->phash_buckets[hash_val];
	tbl->phash_buckets[hash_val] = n;
	write_unlock_bh(&tbl->lock);
out:
	return n;
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 172 72.57% 4 36.36%
Hideaki Yoshifuji / 吉藤英明 29 12.24% 3 27.27%
Arnaldo Carvalho de Melo 18 7.59% 1 9.09%
Eric W. Biedermann 11 4.64% 1 9.09%
Eric Dumazet 4 1.69% 1 9.09%
Pavel Emelyanov 3 1.27% 1 9.09%
Total 237 100.00% 11 100.00%


EXPORT_SYMBOL(pneigh_lookup);




int pneigh_delete(struct neigh_table *tbl, struct net *net, const void *pkey,
		  struct net_device *dev)
{
	struct pneigh_entry *n, **np;
	int key_len = tbl->key_len;
	u32 hash_val = pneigh_hash(pkey, key_len);

	write_lock_bh(&tbl->lock);
	for (np = &tbl->phash_buckets[hash_val]; (n = *np) != NULL;
	     np = &n->next) {
		if (!memcmp(n->key, pkey, key_len) && n->dev == dev &&
		    net_eq(pneigh_net(n), net)) {
			*np = n->next;
			write_unlock_bh(&tbl->lock);
			if (tbl->pdestructor)
				tbl->pdestructor(n);
			if (n->dev)
				dev_put(n->dev);
			kfree(n);
			return 0;
		}
	}
	write_unlock_bh(&tbl->lock);
	return -ENOENT;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 130 71.43% 4 36.36%
Hideaki Yoshifuji / 吉藤英明 24 13.19% 4 36.36%
David S. Miller 16 8.79% 1 9.09%
Eric W. Biedermann 8 4.40% 1 9.09%
Arnaldo Carvalho de Melo 4 2.20% 1 9.09%
Total 182 100.00% 11 100.00%



static int pneigh_ifdown(struct neigh_table *tbl, struct net_device *dev)
{
	struct pneigh_entry *n, **np;
	u32 h;

	for (h = 0; h <= PNEIGH_HASHMASK; h++) {
		np = &tbl->phash_buckets[h];
		while ((n = *np) != NULL) {
			if (!dev || n->dev == dev) {
				*np = n->next;
				if (tbl->pdestructor)
					tbl->pdestructor(n);
				if (n->dev)
					dev_put(n->dev);
				kfree(n);
				continue;
			}
			np = &n->next;
		}
	}
	return -ENOENT;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 113 87.60% 3 60.00%
Hideaki Yoshifuji / 吉藤英明 13 10.08% 1 20.00%
Arnaldo Carvalho de Melo 3 2.33% 1 20.00%
Total 129 100.00% 5 100.00%

static void neigh_parms_destroy(struct neigh_parms *parms);



static inline void neigh_parms_put(struct neigh_parms *parms)
{
	if (atomic_dec_and_test(&parms->refcnt))
		neigh_parms_destroy(parms);
}

Contributors
Person Tokens Prop Commits CommitProp
Denis V. Lunev 27 100.00% 1 100.00%
Total 27 100.00% 1 100.00%

/*
 *      neighbour must already be out of the table;
 *
 */


void neigh_destroy(struct neighbour *neigh)
{
	struct net_device *dev = neigh->dev;

	NEIGH_CACHE_STAT_INC(neigh->tbl, destroys);

	if (!neigh->dead) {
		pr_warn("Destroying alive neighbour %p\n", neigh);
		dump_stack();
		return;
	}

	if (neigh_del_timer(neigh))
		pr_warn("Impossible event\n");

	write_lock_bh(&neigh->lock);
	__skb_queue_purge(&neigh->arp_queue);
	write_unlock_bh(&neigh->lock);
	neigh->arp_queue_len_bytes = 0;

	if (dev->netdev_ops->ndo_neigh_destroy)
		dev->netdev_ops->ndo_neigh_destroy(dev, neigh);

	dev_put(dev);
	neigh_parms_put(neigh->parms);

	neigh_dbg(2, "neigh %p is destroyed\n", neigh);

	atomic_dec(&neigh->tbl->entries);
	kfree_rcu(neigh, rcu);
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 61 41.50% 2 13.33%
David S. Miller 43 29.25% 6 40.00%
Eric Dumazet 23 15.65% 2 13.33%
Herbert Xu 11 7.48% 2 13.33%
Joe Perches 7 4.76% 2 13.33%
Jiri Pirko 2 1.36% 1 6.67%
Total 147 100.00% 15 100.00%


EXPORT_SYMBOL(neigh_destroy);

/* Neighbour state is suspicious;
   disable fast path.

   Called with write_locked neigh.
 */


static void neigh_suspect(struct neighbour *neigh)
{
	neigh_dbg(2, "neigh %p is suspected\n", neigh);

	neigh->output = neigh->ops->output;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 26 86.67% 1 50.00%
Joe Perches 4 13.33% 1 50.00%
Total 30 100.00% 2 100.00%

/* Neighbour state is OK;
   enable fast path.

   Called with write_locked neigh.
 */


static void neigh_connect(struct neighbour *neigh)
{
	neigh_dbg(2, "neigh %p is connected\n", neigh);

	neigh->output = neigh->ops->connected_output;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 26 86.67% 1 50.00%
Joe Perches 4 13.33% 1 50.00%
Total 30 100.00% 2 100.00%



static void neigh_periodic_work(struct work_struct *work)
{
	struct neigh_table *tbl = container_of(work, struct neigh_table, gc_work.work);
	struct neighbour *n;
	struct neighbour __rcu **np;
	unsigned int i;
	struct neigh_hash_table *nht;

	NEIGH_CACHE_STAT_INC(tbl, periodic_gc_runs);

	write_lock_bh(&tbl->lock);
	nht = rcu_dereference_protected(tbl->nht,
					lockdep_is_held(&tbl->lock));

	/*
         *      periodically recompute ReachableTime from random function
         */

	if (time_after(jiffies, tbl->last_rand + 300 * HZ)) {
		struct neigh_parms *p;
		tbl->last_rand = jiffies;
		list_for_each_entry(p, &tbl->parms_list, list)
			p->reachable_time =
				neigh_rand_reach_time(NEIGH_VAR(p, BASE_REACHABLE_TIME));
	}

	if (atomic_read(&tbl->entries) < tbl->gc_thresh1)
		goto out;

	for (i = 0 ; i < (1 << nht->hash_shift); i++) {
		np = &nht->hash_buckets[i];

		while ((n = rcu_dereference_protected(*np,
				lockdep_is_held(&tbl->lock))) != NULL) {
			unsigned int state;

			write_lock(&n->lock);

			state = n->nud_state;
			if (state & (NUD_PERMANENT | NUD_IN_TIMER)) {
				write_unlock(&n->lock);
				goto next_elt;
			}

			if (time_before(n->used, n->confirmed))
				n->used = n->confirmed;

			if (atomic_read(&n->refcnt) == 1 &&
			    (state == NUD_FAILED ||
			     time_after(jiffies, n->used + NEIGH_VAR(n->parms, GC_STALETIME)))) {
				*np = n->next;
				n->dead = 1;
				write_unlock(&n->lock);
				neigh_cleanup_and_release(n);
				continue;
			}
			write_unlock(&n->lock);

next_elt:
			np = &n->next;
		}
		/*
                 * It's fine to release lock here, even if hash table
                 * grows while we are preempted.
                 */
		write_unlock_bh(&tbl->lock);
		cond_resched();
		write_lock_bh(&tbl->lock);
		nht = rcu_dereference_protected(tbl->nht,
						lockdep_is_held(&tbl->lock));
	}
out:
	/* Cycle through all hash buckets every BASE_REACHABLE_TIME/2 ticks.
         * ARP entry timeouts range from 1/2 BASE_REACHABLE_TIME to 3/2
         * BASE_REACHABLE_TIME.
         */
	queue_delayed_work(system_power_efficient_wq, &tbl->gc_work,
			      NEIGH_VAR(&tbl->parms, BASE_REACHABLE_TIME) >> 1);
	write_unlock_bh(&tbl->lock);
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 217 51.91% 5 23.81%
Eric Dumazet 91 21.77% 3 14.29%
David S. Miller 26 6.22% 3 14.29%
Duan Jiong 17 4.07% 1 4.76%
Jiri Pirko 17 4.07% 1 4.76%
Michel Machado 17 4.07% 1 4.76%
Hideaki Yoshifuji / 吉藤英明 14 3.35% 2 9.52%
Nicolas Dichtel 8 1.91% 1 4.76%
Arjan van de Ven 6 1.44% 1 4.76%
Viresh Kumar 3 0.72% 1 4.76%
Thomas Graf 1 0.24% 1 4.76%
Alan Cox 1 0.24% 1 4.76%
Total 418 100.00% 21 100.00%



static __inline__ int neigh_max_probes(struct neighbour *n)
{
	struct neigh_parms *p = n->parms;
	return NEIGH_VAR(p, UCAST_PROBES) + NEIGH_VAR(p, APP_PROBES) +
	       (n->nud_state & NUD_PROBE ? NEIGH_VAR(p, MCAST_REPROBES) :
	        NEIGH_VAR(p, MCAST_PROBES));
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 26 44.83% 1 25.00%
Jiri Pirko 15 25.86% 1 25.00%
Hideaki Yoshifuji/吉藤英明 11 18.97% 1 25.00%
Timo Teräs 6 10.34% 1 25.00%
Total 58 100.00% 4 100.00%


static void neigh_invalidate(struct neighbour *neigh)
	__releases(neigh->lock)
	__acquires(neigh->lock)
{
	struct sk_buff *skb;

	NEIGH_CACHE_STAT_INC(neigh->tbl, res_failed);
	neigh_dbg(2, "neigh %p is failed\n", neigh);
	neigh->updated = jiffies;

	/* It is very thin place. report_unreachable is very complicated
           routine. Particularly, it can hit the same neighbour entry!

           So that, we try to be accurate and avoid dead loop. --ANK
         */
	while (neigh->nud_state == NUD_FAILED &&
	       (skb = __skb_dequeue(&neigh->arp_queue)) != NULL) {
		write_unlock(&neigh->lock);
		neigh->ops->error_report(neigh, skb);
		write_lock(&neigh->lock);
	}
	__skb_queue_purge(&neigh->arp_queue);
	neigh->arp_queue_len_bytes = 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Timo Teräs 95 80.51% 1 20.00%
Eric Dumazet 19 16.10% 3 60.00%
Joe Perches 4 3.39% 1 20.00%
Total 118 100.00% 5 100.00%


static void neigh_probe(struct neighbour *neigh)
	__releases(neigh->lock)
{
	struct sk_buff *skb = skb_peek_tail(&neigh->arp_queue);
	/* keep skb alive even if arp_queue overflows */
	if (skb)
		skb = skb_clone(skb, GFP_ATOMIC);
	write_unlock(&neigh->lock);
	if (neigh->ops->solicit)
		neigh->ops->solicit(neigh, skb);
	atomic_inc(&neigh->probes);
	kfree_skb(skb);
}

Contributors
Person Tokens Prop Commits CommitProp
Eric Dumazet 82 97.62% 2 50.00%
Hannes Frederic Sowa 1 1.19% 1 25.00%
Junwei (Martin) Zhang 1 1.19% 1 25.00%
Total 84 100.00% 4 100.00%

/* Called when a timer expires for a neighbour entry. */



static void neigh_timer_handler(unsigned long arg)
{
	unsigned long now, next;
	struct neighbour *neigh = (struct neighbour *)arg;
	unsigned int state;
	int notify = 0;

	write_lock(&neigh->lock);

	state = neigh->nud_state;
	now = jiffies;
	next = now + HZ;

	if (!(state & NUD_IN_TIMER))
		goto out;

	if (state & NUD_REACHABLE) {
		if (time_before_eq(now,
				   neigh->confirmed + neigh->parms->reachable_time)) {
			neigh_dbg(2, "neigh %p is still alive\n", neigh);
			next = neigh->confirmed + neigh->parms->reachable_time;
		} else if (time_before_eq(now,
					  neigh->used +
					  NEIGH_VAR(neigh->parms, DELAY_PROBE_TIME))) {
			neigh_dbg(2, "neigh %p is delayed\n", neigh);
			neigh->nud_state = NUD_DELAY;
			neigh->updated = jiffies;
			neigh_suspect(neigh);
			next = now + NEIGH_VAR(neigh->parms, DELAY_PROBE_TIME);
		} else {
			neigh_dbg(2, "neigh %p is suspected\n", neigh);
			neigh->nud_state = NUD_STALE;
			neigh->updated = jiffies;
			neigh_suspect(neigh);
			notify = 1;
		}
	} else if (state & NUD_DELAY) {
		if (time_before_eq(now,
				   neigh->confirmed +
				   NEIGH_VAR(neigh->parms, DELAY_PROBE_TIME))) {
			neigh_dbg(2, "neigh %p is now reachable\n", neigh);
			neigh->nud_state = NUD_REACHABLE;
			neigh->updated = jiffies;
			neigh_connect(neigh);
			notify = 1;
			next = neigh->confirmed + neigh->parms->reachable_time;
		} else {
			neigh_dbg(2, "neigh %p is probed\n", neigh);
			neigh->nud_state = NUD_PROBE;
			neigh->updated = jiffies;
			atomic_set(&neigh->probes, 0);
			notify = 1;
			next = now + NEIGH_VAR(neigh->parms, RETRANS_TIME);
		}
	} else {
		/* NUD_PROBE|NUD_INCOMPLETE */
		next = now + NEIGH_VAR(neigh->parms, RETRANS_TIME);
	}

	if ((neigh->nud_state & (NUD_INCOMPLETE | NUD_PROBE)) &&
	    atomic_read(&neigh->probes) >= neigh_max_probes(neigh)) {
		neigh->nud_state = NUD_FAILED;
		notify = 1;
		neigh_invalidate(neigh);
		goto out;
	}

	if (neigh->nud_state & NUD_IN_TIMER) {
		if (time_before(next, jiffies + HZ/2))
			next = jiffies + HZ/2;
		if (!mod_timer(&neigh->timer, next))
			neigh_hold(neigh);
	}
	if (neigh->nud_state & (NUD_INCOMPLETE | NUD_PROBE)) {
		neigh_probe(neigh);
	} else {
out:
		write_unlock(&neigh->lock);
	}

	if (notify)
		neigh_update_notify(neigh);

	neigh_release(neigh);
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 239 47.90% 3 16.67%
Linus Torvalds (pre-git) 173 34.67% 3 16.67%
Jiri Pirko 25 5.01% 1 5.56%
Joe Perches 20 4.01% 1 5.56%
Tom Tucker 12 2.40% 1 5.56%
Herbert Xu 12 2.40% 1 5.56%
David S. Miller 7 1.40% 2 11.11%
Erik Kline 4 0.80% 1 5.56%
Duan Jiong 3 0.60% 1 5.56%
Eric Dumazet 2 0.40% 2 11.11%
Timo Teräs 1 0.20% 1 5.56%
Thomas Graf 1 0.20% 1 5.56%
Total 499 100.00% 18 100.00%



int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb)
{
	int rc;
	bool immediate_probe = false;

	write_lock_bh(&neigh->lock);

	rc = 0;
	if (neigh->nud_state & (NUD_CONNECTED | NUD_DELAY | NUD_PROBE))
		goto out_unlock_bh;
	if (neigh->dead)
		goto out_dead;

	if (!(neigh->nud_state & (NUD_STALE | NUD_INCOMPLETE))) {
		if (NEIGH_VAR(neigh->parms, MCAST_PROBES) +
		    NEIGH_VAR(neigh->parms, APP_PROBES)) {
			unsigned long next, now = jiffies;

			atomic_set(&neigh->probes,
				   NEIGH_VAR(neigh->parms, UCAST_PROBES));
			neigh->nud_state     = NUD_INCOMPLETE;
			neigh->updated = now;
			next = now + max(NEIGH_VAR(neigh->parms, RETRANS_TIME),
					 HZ/2);
			neigh_add_timer(neigh, next);
			immediate_probe = true;
		} else {
			neigh->nud_state = NUD_FAILED;
			neigh->updated = jiffies;
			write_unlock_bh(&neigh->lock);

			kfree_skb(skb);
			return 1;
		}
	} else if (neigh->nud_state & NUD_STALE) {
		neigh_dbg(2, "neigh %p is delayed\n", neigh);
		neigh->nud_state = NUD_DELAY;
		neigh->updated = jiffies;
		neigh_add_timer(neigh, jiffies +
				NEIGH_VAR(neigh->parms, DELAY_PROBE_TIME));
	}

	if (neigh->nud_state == NUD_INCOMPLETE) {
		if (skb) {
			while (neigh->arp_queue_len_bytes + skb->truesize >
			       NEIGH_VAR(neigh->parms, QUEUE_LEN_BYTES)) {
				struct sk_buff *buff;

				buff = __skb_dequeue(&neigh->arp_queue);
				if (!buff)
					break;
				neigh->arp_queue_len_bytes -= buff->truesize;
				kfree_skb(buff);
				NEIGH_CACHE_STAT_INC(neigh->tbl, unres_discards);
			}
			skb_dst_force(skb);
			__skb_queue_tail(&neigh->arp_queue, skb);
			neigh->arp_queue_len_bytes += skb->truesize;
		}
		rc = 1;
	}
out_unlock_bh:
	if (immediate_probe)
		neigh_probe(neigh);
	else
		write_unlock(&neigh->lock);
	local_bh_enable();
	return rc;

out_dead:
	if (neigh->nud_state & NUD_STALE)
		goto out_unlock_bh;
	write_unlock_bh(&neigh->lock);
	kfree_skb(skb);
	return 1;
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 173 42.30% 3 18.75%
Eric Dumazet 81 19.80% 3 18.75%
Hideaki Yoshifuji / 吉藤英明 50 12.22% 2 12.50%
Julian Anastasov 38 9.29% 1 6.25%
Jiri Pirko 30 7.33% 1 6.25%
Arnaldo Carvalho de Melo 16 3.91% 1 6.25%
Neil Horman 9 2.20% 1 6.25%
David S. Miller 7 1.71% 2 12.50%
Joe Perches 4 0.98% 1 6.25%
Linus Torvalds 1 0.24% 1 6.25%
Total 409 100.00% 16 100.00%


EXPORT_SYMBOL(__neigh_event_send);



static void neigh_update_hhs(struct neighbour *neigh)
{
	struct hh_cache *hh;
	void (*update)(struct hh_cache*, const struct net_device*, const unsigned char *)
		= NULL;

	if (neigh->dev->header_ops)
		update = neigh->dev->header_ops->cache_update;

	if (update) {
		hh = &neigh->hh;
		if (hh->hh_len) {
			write_seqlock_bh(&hh->hh_lock);
			update(hh, neigh->dev, neigh->ha);
			write_sequnlock_bh(&hh->hh_lock);
		}
	}
}



Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 80 74.77% 3 37.50%
Doug Kehn 13 12.15% 1 12.50%
Stephen Hemminger 7 6.54% 2 25.00%
David S. Miller 7 6.54% 2 25.00%
Total 107 100.00% 8 100.00%

/* Generic update routine.
   -- lladdr is new lladdr or NULL, if it is not supplied.
   -- new    is new state.
   -- flags
        NEIGH_UPDATE_F_OVERRIDE allows to override existing lladdr,
                                if it is different.
        NEIGH_UPDATE_F_WEAK_OVERRIDE will suspect existing "connected"
                                lladdr instead of overriding it
                                if it is different.
        NEIGH_UPDATE_F_ADMIN    means that the change is administrative.

        NEIGH_UPDATE_F_OVERRIDE_ISROUTER allows to override existing
                                NTF_ROUTER flag.
        NEIGH_UPDATE_F_ISROUTER indicates if the neighbour is known as
                                a router.

   Caller MUST hold reference count on the entry.
 */



int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new,
		 u32 flags)
{
	u8 old;
	int err;
	int notify = 0;
	struct net_device *dev;
	int update_isrouter = 0;

	write_lock_bh(&neigh->lock);

	dev    = neigh->dev;
	old    = neigh->nud_state;
	err    = -EPERM;

	if (!(flags & NEIGH_UPDATE_F_ADMIN) &&
	    (old & (NUD_NOARP | NUD_PERMANENT)))
		goto out;
	if (neigh->dead)
		goto out;

	if (!(new & NUD_VALID)) {
		neigh_del_timer(neigh);
		if (old & NUD_CONNECTED)
			neigh_suspect(neigh);
		neigh->nud_state = new;
		err = 0;
		notify = old & NUD_VALID;
		if ((old & (NUD_INCOMPLETE | NUD_PROBE)) &&
		    (new & NUD_FAILED)) {
			neigh_invalidate(neigh);
			notify = 1;
		}
		goto out;
	}

	/* Compare new lladdr with cached one */
	if (!dev->addr_len) {
		/* First case: device needs no address. */
		lladdr = neigh->ha;
	} else if (lladdr) {
		/* The second case: if something is already cached
                   and a new address is proposed:
                   - compare new & old
                   - if they are different, check override flag
                 */
		if ((old & NUD_VALID) &&
		    !memcmp(lladdr, neigh->ha, dev->addr_len))
			lladdr = neigh->ha;
	} else {
		/* No address is supplied; if we know something,
                   use it, otherwise discard the request.
                 */
		err = -EINVAL;
		if (!(old & NUD_VALID))
			goto out;
		lladdr = neigh->ha;
	}

	if (new & NUD_CONNECTED)
		neigh->confirmed = jiffies;
	neigh->updated = jiffies;

	/* If entry was valid and address is not changed,
           do not change entry state, if new one is STALE.
         */
	err = 0;
	update_isrouter = flags & NEIGH_UPDATE_F_OVERRIDE_ISROUTER;
	if (old & NUD_VALID) {
		if (lladdr != neigh->ha && !(flags & NEIGH_UPDATE_F_OVERRIDE)) {
			update_isrouter = 0;
			if ((flags & NEIGH_UPDATE_F_WEAK_OVERRIDE) &&
			    (old & NUD_CONNECTED)) {
				lladdr = neigh->ha;
				new = NUD_STALE;
			} else
				goto out;
		} else {
			if (lladdr == neigh->ha && new == NUD_STALE &&
			    !(flags & NEIGH_UPDATE_F_ADMIN))
				new = old;
		}
	}

	if (new != old) {
		neigh_del_timer(neigh);
		if (new & NUD_PROBE)
			atomic_set(&neigh->probes, 0);
		if (new & NUD_IN_TIMER)
			neigh_add_timer(neigh, (jiffies +
						((new & NUD_REACHABLE) ?
						 neigh->parms->reachable_time :
						 0)));
		neigh->nud_state = new;
		notify = 1;
	}

	if (lladdr != neigh->ha) {
		write_seqlock(&neigh->ha_lock);
		memcpy(&neigh->ha, lladdr, dev->addr_len);
		write_sequnlock(&neigh->ha_lock);
		neigh_update_hhs(neigh);
		if (!(new & NUD_CONNECTED))
			neigh->confirmed = jiffies -
				      (NEIGH_VAR(neigh->parms, BASE_REACHABLE_TIME) << 1);
		notify = 1;
	}
	if (new == old)
		goto out;
	if (new & NUD_CONNECTED)
		neigh_connect(neigh);
	else
		neigh_suspect(neigh);
	if (!(old & NUD_VALID)) {
		struct sk_buff *skb;

		/* Again: avoid dead loop if something went wrong */

		while (neigh->nud_state & NUD_VALID &&
		       (skb = __skb_dequeue(&neigh->arp_queue)) != NULL) {
			struct dst_entry *dst = skb_dst(skb);
			struct neighbour *n2, *n1 = neigh;
			write_unlock_bh(&neigh->lock);

			rcu_read_lock();

			/* Why not just use 'neigh' as-is?  The problem is that
                         * things such as shaper, eql, and sch_teql can end up
                         * using alternative, different, neigh objects to output
                         * the packet in the output path.  So what we need to do
                         * here is re-lookup the top-level neigh in the path so
                         * we can reinject the packet there.
                         */
			n2 = NULL;
			if (dst) {
				n2 = dst_neigh_lookup_skb(dst, skb);
				if (n2)
					n1 = n2;
			}
			n1->output(n1, skb);
			if (n2)
				neigh_release(n2);
			rcu_read_unlock();

			write_lock_bh(&neigh->lock);
		}
		__skb_queue_purge(&neigh->arp_queue);
		neigh->arp_queue_len_bytes = 0;
	}
out:
	if (update_isrouter) {
		neigh->flags = (flags & NEIGH_UPDATE_F_ISROUTER) ?
			(neigh->flags | NTF_ROUTER) :
			(neigh->flags & ~NTF_ROUTER);
	}
	write_unlock_bh(&neigh->lock);

	if (notify)
		neigh_update_notify(neigh);

	return err;
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 422 57.18% 7 23.33%
Hideaki Yoshifuji / 吉藤英明 150 20.33% 5 16.67%
David S. Miller 49 6.64% 4 13.33%
Timo Teräs 29 3.93% 1 3.33%
Eric Dumazet 25 3.39% 4 13.33%
Julian Anastasov 16 2.17% 2 6.67%
Erik Kline 16 2.17% 1 3.33%
Arnaldo Carvalho de Melo 11 1.49% 1 3.33%
Li RongQing 6 0.81% 1 3.33%
Jiri Pirko 5 0.68% 1 3.33%
Bob Gilligan 4 0.54% 1 3.33%
Tom Tucker 4 0.54% 1 3.33%
Thomas Graf 1 0.14% 1 3.33%
Total 738 100.00% 30 100.00%


EXPORT_SYMBOL(neigh_update);

/* Update the neigh to listen temporarily for probe responses, even if it is
 * in a NUD_FAILED state. The caller has to hold neigh->lock for writing.
 */


void __neigh_set_probe_once(struct neighbour *neigh)
{
	if (neigh->dead)
		return;
	neigh->updated = jiffies;
	if (!(neigh->nud_state & NUD_FAILED))
		return;
	neigh->nud_state = NUD_INCOMPLETE;
	atomic_set(&neigh->probes, neigh_max_probes(neigh));
	neigh_add_timer(neigh,
			jiffies + NEIGH_VAR(neigh->parms, RETRANS_TIME));
}
Contributors
Person Tokens Prop Commits CommitProp
Jiri Benc 61 87.14% 1 33.33%
Julian Anastasov 7 10.00% 1 33.33%
Duan Jiong 2 2.86% 1 33.33%
Total 70 100.00% 3 100.00%


EXPORT_SYMBOL(__neigh_set_probe_once);



struct neighbour *neigh_event_ns(struct neigh_table *tbl,
				 u8 *lladdr, void *saddr,
				 struct net_device *dev)
{
	struct neighbour *neigh = __neigh_lookup(tbl, saddr, dev,
						 lladdr || !dev->addr_len);
	if (neigh)
		neigh_update(neigh, lladdr, NUD_STALE,
			     NEIGH_UPDATE_F_OVERRIDE);
	return neigh;
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 61 95.31% 2 50.00%
Arnaldo Carvalho de Melo 2 3.12% 1 25.00%
Hideaki Yoshifuji / 吉藤英明 1 1.56% 1 25.00%
Total 64 100.00% 4 100.00%


EXPORT_SYMBOL(neigh_event_ns);

/* called with read_lock_bh(&n->lock); */


static void neigh_hh_init(struct neighbour *n)
{
	struct net_device *dev = n->dev;
	__be16 prot = n->tbl->protocol;
	struct hh_cache	*hh = &n->hh;

	write_lock_bh(&n->lock);

	/* Only one thread can come in here and initialize the
         * hh_cache entry.
         */
	if (!hh->hh_len)
		dev->header_ops->cache(n, hh, prot);

	write_unlock_bh(&n->lock);
}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 26 34.21% 3 30.00%
Eric Dumazet 25 32.89% 2 20.00%
Linus Torvalds (pre-git) 16 21.05% 2 20.00%
Eric W. Biedermann 3 3.95% 1 10.00%
Stephen Hemminger 3 3.95% 1 10.00%
Andrew Morton 3 3.95% 1 10.00%
Total 76 100.00% 10 100.00%

/* Slow and careful. */



int neigh_resolve_output(struct neighbour *neigh, struct sk_buff *skb)
{
	int rc = 0;

	if (!neigh_event_send(neigh, skb)) {
		int err;
		struct net_device *dev = neigh->dev;
		unsigned int seq;

		if (dev->header_ops->cache && !neigh->hh.hh_len)
			neigh_hh_init(neigh);

		do {
			__skb_pull(skb, skb_network_offset(skb));
			seq = read_seqbegin(&neigh->ha_lock);
			err = dev_hard_header(skb, dev, ntohs(skb->protocol),
					      neigh->ha, NULL, skb->len);
		} while (read_seqretry(&neigh->ha_lock, seq));

		if (err >= 0)
			rc = dev_queue_xmit(skb);
		else
			goto out_kfree_skb;
	}
out:
	return rc;
out_kfree_skb:
	rc = -EINVAL;
	kfree_skb(skb);
	goto out;
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 94 56.29% 4 33.33%
Eric Dumazet 25 14.97% 1 8.33%
Arnaldo Carvalho de Melo 25 14.97% 1 8.33%
ramesh.nagappa@gmail.com 10 5.99% 1 8.33%
David S. Miller 9 5.39% 3 25.00%
Stephen Hemminger 4 2.40% 2 16.67%
Total 167 100.00% 12 100.00%


EXPORT_SYMBOL(neigh_resolve_output);

/* As fast as possible without hh cache */



int neigh_connected_output(struct neighbour *neigh, struct sk_buff *skb)
{
	struct net_device *dev = neigh->dev;
	unsigned int seq;
	int err;

	do {
		__skb_pull(skb, skb_network_offset(skb));
		seq = read_seqbegin(&neigh->ha_lock);
		err = dev_hard_header(skb, dev, ntohs(skb->protocol),
				      neigh->ha, NULL, skb->len);
	} while (read_seqretry(&neigh->ha_lock, seq));

	if (err >= 0)
		err = dev_queue_xmit(skb);
	else {
		err = -EINVAL;
		kfree_skb(skb);
	}
	return err;
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 78 63.93% 4 36.36%
Eric Dumazet 17 13.93% 1 9.09%
Arnaldo Carvalho de Melo 15 12.30% 2 18.18%
David S. Miller 9 7.38% 2 18.18%
ramesh.nagappa@gmail.com 2 1.64% 1 9.09%
Stephen Hemminger 1 0.82% 1 9.09%
Total 122 100.00% 11 100.00%


EXPORT_SYMBOL(neigh_connected_output);



int neigh_direct_output(struct neighbour *neigh, struct sk_buff *skb)
{
	return dev_queue_xmit(skb);
}
Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 21 100.00% 1 100.00%
Total 21 100.00% 1 100.00%


EXPORT_SYMBOL(neigh_direct_output);



static void neigh_proxy_process(unsigned long arg)
{
	struct neigh_table *tbl = (struct neigh_table *)arg;
	long sched_next = 0;
	unsigned long now = jiffies;
	struct sk_buff *skb, *n;

	spin_lock(&tbl->proxy_queue.lock);

	skb_queue_walk_safe(&tbl->proxy_queue, skb, n) {
		long tdif = NEIGH_CB(skb)->sched_next - now;

		if (tdif <= 0) {
			struct net_device *dev = skb->dev;

			__skb_unlink(skb, &tbl->proxy_queue);
			if (tbl->proxy_redo && netif_running(dev)) {
				rcu_read_lock();
				tbl->proxy_redo(skb);
				rcu_read_unlock();
			} else {
				kfree_skb(skb);
			}

			dev_put(dev);
		} else if (!sched_next || tdif < sched_next)
			sched_next = tdif;
	}
	del_timer(&tbl->proxy_timer);
	if (sched_next)
		mod_timer(&tbl->proxy_timer, jiffies + sched_next);
	spin_unlock(&tbl->proxy_queue.lock);
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 157 83.96% 3 50.00%
David S. Miller 16 8.56% 1 16.67%
Eric Dumazet 10 5.35% 1 16.67%
Patrick McHardy 4 2.14% 1 16.67%
Total 187 100.00% 6 100.00%



void pneigh_enqueue(struct neigh_table *tbl, struct neigh_parms *p,
		    struct sk_buff *skb)
{
	unsigned long now = jiffies;

	unsigned long sched_next = now + (prandom_u32() %
					  NEIGH_VAR(p, PROXY_DELAY));

	if (tbl->proxy_queue.qlen > NEIGH_VAR(p, PROXY_QLEN)) {
		kfree_skb(skb);
		return;
	}

	NEIGH_CB(skb)->sched_next = sched_next;
	NEIGH_CB(skb)->flags |= LOCALLY_ENQUEUED;

	spin_lock(&tbl->proxy_queue.lock);
	if (del_timer(&tbl->proxy_timer)) {
		if (time_before(tbl->proxy_timer.expires, sched_next))
			sched_next = tbl->proxy_timer.expires;
	}
	skb_dst_drop(skb);
	dev_hold(skb->dev);
	__skb_queue_tail(&tbl->proxy_queue, skb);
	mod_timer(&tbl->proxy_timer, sched_next);
	spin_unlock(&tbl->proxy_queue.lock);
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 131 77.06% 2 28.57%
Hideaki Yoshifuji / 吉藤英明 16 9.41% 1 14.29%
Patrick McHardy 11 6.47% 1 14.29%
Jiri Pirko 10 5.88% 1 14.29%
Aruna-Hewapathirane 1 0.59% 1 14.29%
Eric Dumazet 1 0.59% 1 14.29%
Total 170 100.00% 7 100.00%


EXPORT_SYMBOL(pneigh_enqueue);



static inline struct neigh_parms *lookup_neigh_parms(struct neigh_table *tbl,
						      struct net *net, int ifindex)
{
	struct neigh_parms *p;

	list_for_each_entry(p, &tbl->parms_list, list) {
		if ((p->dev && p->dev->ifindex == ifindex && net_eq(neigh_parms_net(p), net)) ||
		    (!p->dev && !ifindex && net_eq(net, &init_net)))
			return p;
	}

	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Eric W. Biedermann 60 68.97% 1 14.29%
Gao Feng 8 9.20% 1 14.29%
Nicolas Dichtel 8 9.20% 1 14.29%
Hideaki Yoshifuji / 吉藤英明 7 8.05% 2 28.57%
Denis V. Lunev 3 3.45% 1 14.29%
Tobias Klauser 1 1.15% 1 14.29%
Total 87 100.00% 7 100.00%



struct neigh_parms *neigh_parms_alloc(struct net_device *dev,
				      struct neigh_table *tbl)
{
	struct neigh_parms *p;
	struct net *net = dev_net(dev);
	const struct net_device_ops *ops = dev->netdev_ops;

	p = kmemdup(&tbl->parms, sizeof(*p), GFP_KERNEL);
	if (p) {
		p->tbl		  = tbl;
		atomic_set(&p->refcnt, 1);
		p->reachable_time =
				neigh_rand_reach_time(NEIGH_VAR(p, BASE_REACHABLE_TIME));
		dev_hold(dev);
		p->dev = dev;
		write_pnet(&p->net, net);
		p->sysctl_table = NULL;

		if (ops->ndo_neigh_setup && ops->ndo_neigh_setup(dev, p)) {
			dev_put(dev);
			kfree(p);
			return NULL;
		}

		write_lock_bh(&tbl->lock);
		list_add(&p->list, &tbl->parms.list);
		write_unlock_bh(&tbl->lock);

		neigh_parms_data_state_cleanall(p);
	}
	return p;
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 76 39.58% 4 23.53%
Veaceslav Falico 30 15.62% 1 5.88%
Eric W. Biedermann 17 8.85% 1 5.88%
Stephen Hemminger 12 6.25% 1 5.88%
Thomas Graf 11 5.73% 1 5.88%
Herbert Xu 10 5.21% 1 5.88%
Jiri Pirko 10 5.21% 2 11.76%
Nicolas Dichtel 8 4.17% 1 5.88%
Krishna Kumar 6 3.12% 1 5.88%
Eric Dumazet 4 2.08% 1 5.88%
Gao Feng 4 2.08% 1 5.88%
Hideaki Yoshifuji / 吉藤英明 3 1.56% 1 5.88%
Arnaldo Carvalho de Melo 1 0.52% 1 5.88%
Total 192 100.00% 17 100.00%


EXPORT_SYMBOL(neigh_parms_alloc);



static void neigh_rcu_free_parms(struct rcu_head *head)
{
	struct neigh_parms *parms =
		container_of(head, struct neigh_parms, rcu_head);

	neigh_parms_put(parms);
}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 30 96.77% 1 50.00%
Herbert Xu 1 3.23% 1 50.00%
Total 31 100.00% 2 100.00%



void neigh_parms_release(struct neigh_table *tbl, struct neigh_parms *parms)
{
	if (!parms || parms == &tbl->parms)
		return;
	write_lock_bh(&tbl->lock);
	list_del(&parms->list);
	parms->dead = 1;
	write_unlock_bh(&tbl->lock);
	if (parms->dev)
		dev_put(parms->dev);
	call_rcu(&parms->rcu_head, neigh_rcu_free_parms);
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 51 62.96% 3 37.50%
David S. Miller 19 23.46% 2 25.00%
Herbert Xu 6 7.41% 1 12.50%
Nicolas Dichtel 4 4.94% 1 12.50%
Arnaldo Carvalho de Melo 1 1.23% 1 12.50%
Total 81 100.00% 8 100.00%


EXPORT_SYMBOL(neigh_parms_release);



static void neigh_parms_destroy(struct neigh_parms *parms)
{
	kfree(parms);
}

Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 15 93.75% 1 50.00%
Denis V. Lunev 1 6.25% 1 50.00%
Total 16 100.00% 2 100.00%


static struct lock_class_key neigh_table_proxy_queue_class;


static struct neigh_table *neigh_tables[NEIGH_NR_TABLES] __read_mostly;



void neigh_table_init(int index, struct neigh_table *tbl)
{
	unsigned long now = jiffies;
	unsigned long phsize;

	INIT_LIST_HEAD(&tbl->parms_list);
	list_add(&tbl->parms.list, &tbl->parms_list);
	write_pnet(&tbl->parms.net, &init_net);
	atomic_set(&tbl->parms.refcnt, 1);
	tbl->parms.reachable_time =
			  neigh_rand_reach_time(NEIGH_VAR(&tbl->parms, BASE_REACHABLE_TIME));

	tbl->stats = alloc_percpu(struct neigh_statistics);
	if (!tbl->stats)
		panic("cannot create neighbour cache statistics");

#ifdef CONFIG_PROC_FS
	if (!proc_create_data(tbl->id, 0, init_net.proc_net_stat,
			      &neigh_stat_seq_fops, tbl))
		panic("cannot create neighbour proc dir entry");
#endif

	RCU_INIT_POINTER(tbl->nht, neigh_hash_alloc(3));

	phsize = (PNEIGH_HASHMASK + 1) * sizeof(struct pneigh_entry *);
	tbl->phash_buckets = kzalloc(phsize, GFP_KERNEL);

	if (!tbl->nht || !tbl->phash_buckets)
		panic("cannot allocate neighbour cache hashes");

	if (!tbl->entry_size)
		tbl->entry_size = ALIGN(offsetof(struct neighbour, primary_key) +
					tbl->key_len, NEIGH_PRIV_ALIGN);
	else
		WARN_ON(tbl->entry_size % NEIGH_PRIV_ALIGN);

	rwlock_init(&tbl->lock);
	INIT_DEFERRABLE_WORK(&tbl->gc_work, neigh_periodic_work);
	queue_delayed_work(system_power_efficient_wq, &tbl->gc_work,
			tbl->parms.reachable_time);
	setup_timer(&tbl->proxy_timer, neigh_proxy_process, (unsigned long)tbl);
	skb_queue_head_init_class(&tbl->proxy_queue,
			&neigh_table_proxy_queue_class);

	tbl->last_flush = now;
	tbl->last_rand	= now + tbl->parms.reachable_time * 20;

	neigh_tables[index] = tbl;
}
Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 90 27.78% 4 14.81%
Linus Torvalds (pre-git) 81 25.00% 1 3.70%
Hideaki Yoshifuji / 吉藤英明 38 11.73% 1 3.70%
Nicolas Dichtel 23 7.10% 1 3.70%
Eric Dumazet 20 6.17% 4 14.81%
Herbert Xu 12 3.70% 1 3.70%
Pavel Emelyanov 11 3.40% 2 7.41%
Eric W. Biedermann 10 3.09% 2 7.41%
Andrew Morton 9 2.78% 3 11.11%
Américo Wang 7 2.16% 1 3.70%
Jiri Pirko 6 1.85% 1 3.70%
Harald Welte 4 1.23% 1 3.70%
Alexey Dobriyan 3 0.93% 1 3.70%
Wang Chen 3 0.93% 1 3.70%
Denis V. Lunev 3 0.93% 1 3.70%
Viresh Kumar 3 0.93% 1 3.70%
Tejun Heo 1 0.31% 1 3.70%
Total 324 100.00% 27 100.00%


EXPORT_SYMBOL(neigh_table_init);



int neigh_table_clear(int index, struct neigh_table *tbl)
{
	neigh_tables[index] = NULL;
	/* It is not clean... Fix it to unload IPv6 module safely */
	cancel_delayed_work_sync(&tbl->gc_work);
	del_timer_sync(&tbl->proxy_timer);
	pneigh_queue_purge(&tbl->proxy_queue);
	neigh_ifdown(tbl, NULL);
	if (atomic_read(&tbl->entries))
		pr_crit("neighbour leakage\n");

	call_rcu(&rcu_dereference_protected(tbl->nht, 1)->rcu,
		 neigh_hash_free_rcu);
	tbl->nht = NULL;

	kfree(tbl->phash_buckets);
	tbl->phash_buckets = NULL;

	remove_proc_entry(tbl->id, init_net.proc_net_stat);

	free_percpu(tbl->stats);
	tbl->stats = NULL;

	return 0;
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 53 40.77% 3 21.43%
David S. Miller 24 18.46% 2 14.29%
Eric Dumazet 13 10.00% 3 21.43%
Kirill Korotaev 13 10.00% 1 7.14%
Alexey Dobriyan 11 8.46% 1 7.14%
Américo Wang 10 7.69% 1 7.14%
Herbert Xu 4 3.08% 1 7.14%
Tejun Heo 1 0.77% 1 7.14%
Joe Perches 1 0.77% 1 7.14%
Total 130 100.00% 14 100.00%


EXPORT_SYMBOL(neigh_table_clear);



static struct neigh_table *neigh_find_table(int family)
{
	struct neigh_table *tbl = NULL;

	switch (family) {
	case AF_INET:
		tbl = neigh_tables[NEIGH_ARP_TABLE];
		break;
	case AF_INET6:
		tbl = neigh_tables[NEIGH_ND_TABLE];
		break;
	case AF_DECnet:
		tbl = neigh_tables[NEIGH_DN_TABLE];
		break;
	}

	return tbl;
}

Contributors
Person Tokens Prop Commits CommitProp
Américo Wang 60 100.00% 1 100.00%
Total 60 100.00% 1 100.00%



static int neigh_delete(struct sk_buff *skb, struct nlmsghdr *nlh)
{
	struct net *net = sock_net(skb->sk);
	struct ndmsg *ndm;
	struct nlattr *dst_attr;
	struct neigh_table *tbl;
	struct neighbour *neigh;
	struct net_device *dev = NULL;
	int err = -EINVAL;

	ASSERT_RTNL();
	if (nlmsg_len(nlh) < sizeof(*ndm))
		goto out;

	dst_attr = nlmsg_find_attr(nlh, sizeof(*ndm), NDA_DST);
	if (dst_attr == NULL)
		goto out;

	ndm = nlmsg_data(nlh);
	if (ndm->ndm_ifindex) {
		dev = __dev_get_by_index(net, ndm->ndm_ifindex);
		if (dev == NULL) {
			err = -ENODEV;
			goto out;
		}
	}

	tbl = neigh_find_table(ndm->ndm_family);
	if (tbl == NULL)
		return -EAFNOSUPPORT;

	if (nla_len(dst_attr) < tbl->key_len)
		goto out;

	if (ndm->ndm_flags & NTF_PROXY) {
		err = pneigh_delete(tbl, net, nla_data(dst_attr), dev);
		goto out;
	}

	if (dev == NULL)
		goto out;

	neigh = neigh_lookup(tbl, nla_data(dst_attr), dev);
	if (neigh == NULL) {
		err = -ENOENT;
		goto out;
	}

	err = neigh_update(neigh, NULL, NUD_FAILED,
			   NEIGH_UPDATE_F_OVERRIDE |
			   NEIGH_UPDATE_F_ADMIN);
	neigh_release(neigh);

out:
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 130 47.79% 4 28.57%
Thomas Graf 89 32.72% 3 21.43%
Américo Wang 17 6.25% 1 7.14%
Eric W. Biedermann 13 4.78% 2 14.29%
Arnaldo Carvalho de Melo 9 3.31% 1 7.14%
Eric Dumazet 8 2.94% 1 7.14%
Hideaki Yoshifuji / 吉藤英明 6 2.21% 2 14.29%
Total 272 100.00% 14 100.00%



static int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh)
{
	int flags = NEIGH_UPDATE_F_ADMIN | NEIGH_UPDATE_F_OVERRIDE;
	struct net *net = sock_net(skb->sk);
	struct ndmsg *ndm;
	struct nlattr *tb[NDA_MAX+1];
	struct neigh_table *tbl;
	struct net_device *dev = NULL;
	struct neighbour *neigh;
	void *dst, *lladdr;
	int err;

	ASSERT_RTNL();
	err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
	if (err < 0)
		goto out;

	err = -EINVAL;
	if (tb[NDA_DST] == NULL)
		goto out;

	ndm = nlmsg_data(nlh);
	if (ndm->ndm_ifindex) {
		dev = __dev_get_by_index(net, ndm->ndm_ifindex);
		if (dev == NULL) {
			err = -ENODEV;
			goto out;
		}

		if (tb[NDA_LLADDR] && nla_len(tb[NDA_LLADDR]) < dev->addr_len)
			goto out;
	}

	tbl = neigh_find_table(ndm->ndm_family);
	if (tbl == NULL)
		return -EAFNOSUPPORT;

	if (nla_len(tb[NDA_DST]) < tbl->key_len)
		goto out;
	dst = nla_data(tb[NDA_DST]);
	lladdr = tb[NDA_LLADDR] ? nla_data(tb[NDA_LLADDR]) : NULL;

	if (ndm->ndm_flags & NTF_PROXY) {
		struct pneigh_entry *pn;

		err = -ENOBUFS;
		pn = pneigh_lookup(tbl, net, dst, dev, 1);
		if (pn) {
			pn->flags = ndm->ndm_flags;
			err = 0;
		}
		goto out;
	}

	if (dev == NULL)
		goto out;

	neigh = neigh_lookup(tbl, dst, dev);
	if (neigh == NULL) {
		if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
			err = -ENOENT;
			goto out;
		}

		neigh = __neigh_lookup_errno(tbl, dst, dev);
		if (IS_ERR(neigh)) {
			err = PTR_ERR(neigh);
			goto out;
		}
	} else {
		if (nlh->nlmsg_flags & NLM_F_EXCL) {
			err = -EEXIST;
			neigh_release(neigh);
			goto out;
		}

		if (!(nlh->nlmsg_flags & NLM_F_REPLACE))
			flags &= ~NEIGH_UPDATE_F_OVERRIDE;
	}

	if (ndm->ndm_flags & NTF_USE) {
		neigh_event_send(neigh, NULL);
		err = 0;
	} else
		err = neigh_update(neigh, lladdr, ndm->ndm_state, flags);
	neigh_release(neigh);

out:
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Thomas Graf 263 55.25% 4 25.00%
Linus Torvalds (pre-git) 101 21.22% 4 25.00%
Eric W. Biedermann 35 7.35% 3 18.75%
Américo Wang 31 6.51% 1 6.25%
Ville Nuorvala 24 5.04% 1 6.25%
Eric Dumazet 11 2.31% 1 6.25%
Arnaldo Carvalho de Melo 8 1.68% 1 6.25%
Hideaki Yoshifuji / 吉藤英明 3 0.63% 1 6.25%
Total 476 100.00% 16 100.00%



static int neightbl_fill_parms(struct sk_buff *skb, struct neigh_parms *parms)
{
	struct nlattr *nest;

	nest = nla_nest_start(skb, NDTA_PARMS);
	if (nest == NULL)
		return -ENOBUFS;

	if ((parms->dev &&
	     nla_put_u32(skb, NDTPA_IFINDEX, parms->dev->ifindex)) ||
	    nla_put_u32(skb, NDTPA_REFCNT, atomic_read(&parms->refcnt)) ||
	    nla_put_u32(skb, NDTPA_QUEUE_LENBYTES,
			NEIGH_VAR(parms, QUEUE_LEN_BYTES)) ||
	    /* approximative value for deprecated QUEUE_LEN (in packets) */
	    nla_put_u32(skb, NDTPA_QUEUE_LEN,
			NEIGH_VAR(parms, QUEUE_LEN_BYTES) / SKB_TRUESIZE(ETH_FRAME_LEN)) ||
	    nla_put_u32(skb, NDTPA_PROXY_QLEN, NEIGH_VAR(parms, PROXY_QLEN)) ||
	    nla_put_u32(skb, NDTPA_APP_PROBES, NEIGH_VAR(parms, APP_PROBES)) ||
	    nla_put_u32(skb, NDTPA_UCAST_PROBES,
			NEIGH_VAR(parms, UCAST_PROBES)) ||
	    nla_put_u32(skb, NDTPA_MCAST_PROBES,
			NEIGH_VAR(parms, MCAST_PROBES)) ||
	    nla_put_u32(skb, NDTPA_MCAST_REPROBES,
			NEIGH_VAR(parms, MCAST_REPROBES)) ||
	    nla_put_msecs(skb, NDTPA_REACHABLE_TIME, parms->reachable_time,
			  NDTPA_PAD) ||
	    nla_put_msecs(skb, NDTPA_BASE_REACHABLE_TIME,
			  NEIGH_VAR(parms, BASE_REACHABLE_TIME), NDTPA_PAD) ||
	    nla_put_msecs(skb, NDTPA_GC_STALETIME,
			  NEIGH_VAR(parms, GC_STALETIME), NDTPA_PAD) ||
	    nla_put_msecs(skb, NDTPA_DELAY_PROBE_TIME,
			  NEIGH_VAR(parms, DELAY_PROBE_TIME), NDTPA_PAD) ||
	    nla_put_msecs(skb, NDTPA_RETRANS_TIME,
			  NEIGH_VAR(parms, RETRANS_TIME), NDTPA_PAD) ||
	    nla_put_msecs(skb, NDTPA_ANYCAST_DELAY,
			  NEIGH_VAR(parms, ANYCAST_DELAY), NDTPA_PAD) ||
	    nla_put_msecs(skb, NDTPA_PROXY_DELAY,
			  NEIGH_VAR(parms, PROXY_DELAY), NDTPA_PAD) ||
	    nla_put_msecs(skb, NDTPA_LOCKTIME,
			  NEIGH_VAR(parms, LOCKTIME), NDTPA_PAD))
		goto nla_put_failure;
	return nla_nest_end(skb, nest);

nla_put_failure:
	nla_nest_cancel(skb, nest);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Thomas Graf 182 55.32% 4 40.00%
Jiri Pirko 65 19.76% 1 10.00%
David S. Miller 38 11.55% 1 10.00%
Nicolas Dichtel 16 4.86% 1 10.00%
Hideaki Yoshifuji/吉藤英明 14 4.26% 1 10.00%
Eric Dumazet 13 3.95% 1 10.00%
Shan Wei 1 0.30% 1 10.00%
Total 329 100.00% 10 100.00%



static int neightbl_fill_info(struct sk_buff *skb, struct neigh_table *tbl,
			      u32 pid, u32 seq, int type, int flags)
{
	struct nlmsghdr *nlh;
	struct ndtmsg *ndtmsg;

	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndtmsg), flags);
	if (nlh == NULL)
		return -EMSGSIZE;

	ndtmsg = nlmsg_data(nlh);

	read_lock_bh(&tbl->lock);
	ndtmsg->ndtm_family = tbl->family;
	ndtmsg->ndtm_pad1   = 0;
	ndtmsg->ndtm_pad2   = 0;

	if (nla_put_string(skb, NDTA_NAME, tbl->id) ||
	    nla_put_msecs(skb, NDTA_GC_INTERVAL, tbl->gc_interval, NDTA_PAD) ||
	    nla_put_u32(skb, NDTA_THRESH1, tbl->gc_thresh1) ||
	    nla_put_u32(skb, NDTA_THRESH2, tbl->gc_thresh2) ||
	    nla_put_u32(skb, NDTA_THRESH3, tbl->gc_thresh3))
		goto nla_put_failure;
	{
		unsigned long now = jiffies;
		unsigned int flush_delta = now - tbl->last_flush;
		unsigned int rand_delta = now - tbl->last_rand;
		struct neigh_hash_table *nht;
		struct ndt_config ndc = {
			.ndtc_key_len		= tbl->key_len,
			.ndtc_entry_size	= tbl->entry_size,
			.ndtc_entries		= atomic_read(&tbl->entries),
			.ndtc_last_flush	= jiffies_to_msecs(flush_delta),
			.ndtc_last_rand		= jiffies_to_msecs(rand_delta),
			.ndtc_proxy_qlen	= tbl->proxy_queue.qlen,
                };

		rcu_read_lock_bh();
		nht = rcu_dereference_bh(tbl->nht);
		ndc.ndtc_hash_rnd = nht->hash_rnd[0];
		ndc.ndtc_hash_mask = ((1 << nht->hash_shift) - 1);
		rcu_read_unlock_bh();

		if (nla_put(skb, NDTA_CONFIG, sizeof(ndc), &ndc))
			goto nla_put_failure;
	}

	{
		int cpu;
		struct ndt_stats ndst;

		memset(&ndst, 0, sizeof(ndst));

		for_each_possible_cpu(cpu) {
			struct neigh_statistics	*st;

			st = per_cpu_ptr(tbl->stats, cpu);
			ndst.ndts_allocs		+= st->allocs;
			ndst.ndts_destroys		+= st->destroys;
			ndst.ndts_hash_grows		+= st->hash_grows;
			ndst.ndts_res_failed		+= st->res_failed;
			ndst.ndts_lookups		+= st->lookups;
			ndst.ndts_hits			+= st->hits;
			ndst.ndts_rcv_probes_mcast	+= st->rcv_probes_mcast;
			ndst.ndts_rcv_probes_ucast	+= st->rcv_probes_ucast;
			ndst.ndts_periodic_gc_runs	+= st->periodic_gc_runs;
			ndst.ndts_forced_gc_runs	+= st->forced_gc_runs;
			ndst.ndts_table_fulls		+= st->table_fulls;
		}

		if (nla_put_64bit(skb, NDTA_STATS, sizeof(ndst), &ndst,
				  NDTA_PAD))
			goto nla_put_failure;
	}

	BUG_ON(tbl->parms.dev);
	if (neightbl_fill_parms(skb, &tbl->parms) < 0)
		goto nla_put_failure;

	read_unlock_bh(&tbl->lock);
	nlmsg_end(skb, nlh);
	return 0;

nla_put_failure:
	read_unlock_bh(&tbl->lock);
	nlmsg_cancel(skb, nlh);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Thomas Graf 426 79.48% 4 25.00%
David S. Miller 40 7.46% 3 18.75%
Eric Dumazet 33 6.16% 1 6.25%
Patrick McHardy 17 3.17% 2 12.50%
Rick Jones 8 1.49% 1 6.25%
Nicolas Dichtel 5 0.93% 2 12.50%
Johannes Berg 3 0.56% 1 6.25%
John Hawkes 3 0.56% 1 6.25%
Kamezawa Hiroyuki 1 0.19% 1 6.25%
Total 536 100.00% 16 100.00%



static int neightbl_fill_param_info(struct sk_buff *skb,
				    struct neigh_table *tbl,
				    struct neigh_parms *parms,
				    u32 pid, u32 seq, int type,
				    unsigned int flags)
{
	struct ndtmsg *ndtmsg;
	struct nlmsghdr *nlh;

	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndtmsg), flags);
	if (nlh == NULL)
		return -EMSGSIZE;

	ndtmsg = nlmsg_data(nlh);

	read_lock_bh(&tbl->lock);
	ndtmsg->ndtm_family = tbl->family;
	ndtmsg->ndtm_pad1   = 0;
	ndtmsg->ndtm_pad2   = 0;

	if (nla_put_string(skb, NDTA_NAME, tbl->id) < 0 ||
	    neightbl_fill_parms(skb, parms) < 0)
		goto errout;

	read_unlock_bh(&tbl->lock);
	nlmsg_end(skb, nlh);
	return 0;
errout:
	read_unlock_bh(&tbl->lock);
	nlmsg_cancel(skb, nlh);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Thomas Graf 156 88.64% 4 57.14%
Patrick McHardy 17 9.66% 2 28.57%
Johannes Berg 3 1.70% 1 14.29%
Total 176 100.00% 7 100.00%


static const struct nla_policy nl_neightbl_policy[NDTA_MAX+1] = {
	[NDTA_NAME]		= { .type = NLA_STRING },
	[NDTA_THRESH1]		= { .type = NLA_U32 },
	[NDTA_THRESH2]		= { .type = NLA_U32 },
	[NDTA_THRESH3]		= { .type = NLA_U32 },
	[NDTA_GC_INTERVAL]	= { .type = NLA_U64 },
	[NDTA_PARMS]		= { .type = NLA_NESTED },
};


static const struct nla_policy nl_ntbl_parm_policy[NDTPA_MAX+1] = {
	[NDTPA_IFINDEX]			= { .type = NLA_U32 },
	[NDTPA_QUEUE_LEN]		= { .type = NLA_U32 },
	[NDTPA_PROXY_QLEN]		= { .type = NLA_U32 },
	[NDTPA_APP_PROBES]		= { .type = NLA_U32 },
	[NDTPA_UCAST_PROBES]		= { .type = NLA_U32 },
	[NDTPA_MCAST_PROBES]		= { .type = NLA_U32 },
	[NDTPA_MCAST_REPROBES]		= { .type = NLA_U32 },
	[NDTPA_BASE_REACHABLE_TIME]	= { .type = NLA_U64 },
	[NDTPA_GC_STALETIME]		= { .type = NLA_U64 },
	[NDTPA_DELAY_PROBE_TIME]	= { .type = NLA_U64 },
	[NDTPA_RETRANS_TIME]		= { .type = NLA_U64 },
	[NDTPA_ANYCAST_DELAY]		= { .type = NLA_U64 },
	[NDTPA_PROXY_DELAY]		= { .type = NLA_U64 },
	[NDTPA_LOCKTIME]		= { .type = NLA_U64 },
};



static int neightbl_set(struct sk_buff *skb, struct nlmsghdr *nlh)
{
	struct net *net = sock_net(skb->sk);
	struct neigh_table *tbl;
	struct ndtmsg *ndtmsg;
	struct nlattr *tb[NDTA_MAX+1];
	bool found = false;
	int err, tidx;

	err = nlmsg_parse(nlh, sizeof(*ndtmsg), tb, NDTA_MAX,
			  nl_neightbl_policy);
	if (err < 0)
		goto errout;

	if (tb[NDTA_NAME] == NULL) {
		err = -EINVAL;
		goto errout;
	}

	ndtmsg = nlmsg_data(nlh);

	for (tidx = 0; tidx < NEIGH_NR_TABLES; tidx++) {
		tbl = neigh_tables[tidx];
		if (!tbl)
			continue;
		if (ndtmsg->ndtm_family && tbl->family != ndtmsg->ndtm_family)
			continue;
		if (nla_strcmp(tb[NDTA_NAME], tbl->id) == 0) {
			found = true;
			break;
		}
	}

	if (!found)
		return -ENOENT;

	/*
         * We acquire tbl->lock to be nice to the periodic timers and
         * make sure they always see a consistent set of values.
         */
	write_lock_bh(&tbl->lock);

	if (tb[NDTA_PARMS]) {
		struct nlattr *tbp[NDTPA_MAX+1];
		struct neigh_parms *p;
		int i, ifindex = 0;

		err = nla_parse_nested(tbp, NDTPA_MAX, tb[NDTA_PARMS],
				       nl_ntbl_parm_policy);
		if (err < 0)
			goto errout_tbl_lock;

		if (tbp[NDTPA_IFINDEX])
			ifindex = nla_get_u32(tbp[NDTPA_IFINDEX]);

		p = lookup_neigh_parms(tbl, net, ifindex);
		if (p == NULL) {
			err = -ENOENT;
			goto errout_tbl_lock;
		}

		for (i = 1; i <= NDTPA_MAX; i++) {
			if (tbp[i] == NULL)
				continue;

			switch (i) {
			case NDTPA_QUEUE_LEN:
				NEIGH_VAR_SET(p, QUEUE_LEN_BYTES,
					      nla_get_u32(tbp[i]) *
					      SKB_TRUESIZE(ETH_FRAME_LEN));
				break;
			case NDTPA_QUEUE_LENBYTES:
				NEIGH_VAR_SET(p, QUEUE_LEN_BYTES,
					      nla_get_u32(tbp[i]));
				break;
			case NDTPA_PROXY_QLEN:
				NEIGH_VAR_SET(p, PROXY_QLEN,
					      nla_get_u32(tbp[i]));
				break;
			case NDTPA_APP_PROBES:
				NEIGH_VAR_SET(p, APP_PROBES,
					      nla_get_u32(tbp[i]));
				break;
			case NDTPA_UCAST_PROBES:
				NEIGH_VAR_SET(p, UCAST_PROBES,
					      nla_get_u32(tbp[i]));
				break;
			case NDTPA_MCAST_PROBES:
				NEIGH_VAR_SET(p, MCAST_PROBES,
					      nla_get_u32(tbp[i]));
				break;
			case NDTPA_MCAST_REPROBES:
				NEIGH_VAR_SET(p, MCAST_REPROBES,
					      nla_get_u32(tbp[i]));
				break;
			case NDTPA_BASE_REACHABLE_TIME:
				NEIGH_VAR_SET(p, BASE_REACHABLE_TIME,
					      nla_get_msecs(tbp[i]));
				/* update reachable_time as well, otherwise, the change will
                                 * only be effective after the next time neigh_periodic_work
                                 * decides to recompute it (can be multiple minutes)
                                 */
				p->reachable_time =
					neigh_rand_reach_time(NEIGH_VAR(p, BASE_REACHABLE_TIME));
				break;
			case NDTPA_GC_STALETIME:
				NEIGH_VAR_SET(p, GC_STALETIME,
					      nla_get_msecs(tbp[i]));
				break;
			case NDTPA_DELAY_PROBE_TIME:
				NEIGH_VAR_SET(p, DELAY_PROBE_TIME,
					      nla_get_msecs(tbp[i]));
				call_netevent_notifiers(NETEVENT_DELAY_PROBE_TIME_UPDATE, p);
				break;
			case NDTPA_RETRANS_TIME:
				NEIGH_VAR_SET(p, RETRANS_TIME,
					      nla_get_msecs(tbp[i]));
				break;
			case NDTPA_ANYCAST_DELAY:
				NEIGH_VAR_SET(p, ANYCAST_DELAY,
					      nla_get_msecs(tbp[i]));
				break;
			case NDTPA_PROXY_DELAY:
				NEIGH_VAR_SET(p, PROXY_DELAY,
					      nla_get_msecs(tbp[i]));
				break;
			case NDTPA_LOCKTIME:
				NEIGH_VAR_SET(p, LOCKTIME,
					      nla_get_msecs(tbp[i]));
				break;
			}
		}
	}

	err = -ENOENT;
	if ((tb[NDTA_THRESH1] || tb[NDTA_THRESH2] ||
	     tb[NDTA_THRESH3] || tb[NDTA_GC_INTERVAL]) &&
	    !net_eq(net, &init_net))
		goto errout_tbl_lock;

	if (tb[NDTA_THRESH1])
		tbl->gc_thresh1 = nla_get_u32(tb[NDTA_THRESH1]);

	if (tb[NDTA_THRESH2])
		tbl->gc_thresh2 = nla_get_u32(tb[NDTA_THRESH2]);

	if (tb[NDTA_THRESH3])
		tbl->gc_thresh3 = nla_get_u32(tb[NDTA_THRESH3]);

	if (tb[NDTA_GC_INTERVAL])
		tbl->gc_interval = nla_get_msecs(tb[NDTA_GC_INTERVAL]);

	err = 0;

errout_tbl_lock:
	write_unlock_bh(&tbl->lock);
errout:
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Thomas Graf 526 69.58% 3 20.00%
Jiri Pirko 78 10.32% 1 6.67%
Gao Feng 41 5.42% 1 6.67%
Américo Wang 36 4.76% 1 6.67%
Hideaki Yoshifuji/吉藤英明 19 2.51% 1 6.67%
Eric Dumazet 18 2.38% 1 6.67%
Jean-Francois Remy 15 1.98% 1 6.67%
Denis V. Lunev 9 1.19% 1 6.67%
Ido Schimmel 7 0.93% 1 6.67%
Hideaki Yoshifuji / 吉藤英明 4 0.53% 2 13.33%
Eric W. Biedermann 2 0.26% 1 6.67%
Tobias Klauser 1 0.13% 1 6.67%
Total 756 100.00% 15 100.00%



static int neightbl_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
{
	struct net *net = sock_net(skb->sk);
	int family, tidx, nidx = 0;
	int tbl_skip = cb->args[0];
	int neigh_skip = cb->args[1];
	struct neigh_table *tbl;

	family = ((struct rtgenmsg *) nlmsg_data(cb->nlh))->rtgen_family;

	for (tidx = 0; tidx < NEIGH_NR_TABLES; tidx++) {
		struct neigh_parms *p;

		tbl = neigh_tables[tidx];
		if (!tbl)
			continue;

		if (tidx < tbl_skip || (family && tbl->family != family))
			continue;

		if (neightbl_fill_info(skb, tbl, NETLINK_CB(cb->skb).portid,
				       cb->nlh->nlmsg_seq, RTM_NEWNEIGHTBL,
				       NLM_F_MULTI) < 0)
			break;

		nidx = 0;
		p = list_next_entry(&tbl->parms, list);
		list_for_each_entry_from(p, &tbl->parms_list, list) {
			if (!net_eq(neigh_parms_net(p), net))
				continue;

			if (nidx < neigh_skip)
				goto next;

			if (neightbl_fill_param_info(skb, tbl, p,
						     NETLINK_CB(cb->skb).portid,
						     cb->nlh->nlmsg_seq,
						     RTM_NEWNEIGHTBL,
						     NLM_F_MULTI) < 0)
				goto out;
		next:
			nidx++;
		}

		neigh_skip = 0;
	}
out:
	cb->args[0] = tidx;
	cb->args[1] = nidx;

	return skb->len;
}

Contributors
Person Tokens Prop Commits CommitProp
Thomas Graf 179 64.16% 3 17.65%
Linus Torvalds (pre-git) 27 9.68% 3 17.65%
Américo Wang 16 5.73% 1 5.88%
Nicolas Dichtel 16 5.73% 1 5.88%
Hideaki Yoshifuji / 吉藤英明 12 4.30% 3 17.65%
Denis V. Lunev 9 3.23% 1 5.88%
Gautam Kachroo 8 2.87% 1 5.88%
Eric W. Biedermann 7 2.51% 2 11.76%
Arnaldo Carvalho de Melo 3 1.08% 1 5.88%
David S. Miller 2 0.72% 1 5.88%
Total 279 100.00% 17 100.00%



static int neigh_fill_info(struct sk_buff *skb, struct neighbour *neigh,
			   u32 pid, u32 seq, int type, unsigned int flags)
{
	unsigned long now = jiffies;
	struct nda_cacheinfo ci;
	struct nlmsghdr *nlh;
	struct ndmsg *ndm;

	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), flags);
	if (nlh == NULL)
		return -EMSGSIZE;

	ndm = nlmsg_data(nlh);
	ndm->ndm_family	 = neigh->ops->family;
	ndm->ndm_pad1    = 0;
	ndm->ndm_pad2    = 0;
	ndm->ndm_flags	 = neigh->flags;
	ndm->ndm_type	 = neigh->type;
	ndm->ndm_ifindex = neigh->dev->ifindex;

	if (nla_put(skb, NDA_DST, neigh->tbl->key_len, neigh->primary_key))
		goto nla_put_failure;

	read_lock_bh(&neigh->lock);
	ndm->ndm_state	 = neigh->nud_state;
	if (neigh->nud_state & NUD_VALID) {
		char haddr[MAX_ADDR_LEN];

		neigh_ha_snapshot(haddr, neigh, neigh->dev);
		if (nla_put(skb, NDA_LLADDR, neigh->dev->addr_len, haddr) < 0) {
			read_unlock_bh(&neigh->lock);
			goto nla_put_failure;
		}
	}

	ci.ndm_used	 = jiffies_to_clock_t(now - neigh->used);
	ci.ndm_confirmed = jiffies_to_clock_t(now - neigh->confirmed);
	ci.ndm_updated	 = jiffies_to_clock_t(now - neigh->updated);
	ci.ndm_refcnt	 = atomic_read(&neigh->refcnt) - 1;
	read_unlock_bh(&neigh->lock);

	if (nla_put_u32(skb, NDA_PROBES, atomic_read(&neigh->probes)) ||
	    nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
		goto nla_put_failure;

	nlmsg_end(skb, nlh);
	return 0;

nla_put_failure:
	nlmsg_cancel(skb, nlh);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 189 53.85% 4 28.57%
Thomas Graf 85 24.22% 2 14.29%
Eric Dumazet 23 6.55% 1 7.14%
Patrick McHardy 17 4.84% 2 14.29%
David S. Miller 16 4.56% 1 7.14%
Stephen Hemminger 9 2.56% 1 7.14%
Jamal Hadi Salim 6 1.71% 1 7.14%
Arnaldo Carvalho de Melo 3 0.85% 1 7.14%
Johannes Berg 3 0.85% 1 7.14%
Total 351 100.00% 14 100.00%



static int pneigh_fill_info(struct sk_buff *skb, struct pneigh_entry *pn,
			    u32 pid, u32 seq, int type, unsigned int flags,
			    struct neigh_table *tbl)
{
	struct nlmsghdr *nlh;
	struct ndmsg *ndm;

	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), flags);
	if (nlh == NULL)
		return -EMSGSIZE;

	ndm = nlmsg_data(nlh);
	ndm->ndm_family	 = tbl->family;
	ndm->ndm_pad1    = 0;
	ndm->ndm_pad2    = 0;
	ndm->ndm_flags	 = pn->flags | NTF_PROXY;
	ndm->ndm_type	 = RTN_UNICAST;
	ndm->ndm_ifindex = pn->dev ? pn->dev->ifindex : 0;
	ndm->ndm_state	 = NUD_NONE;

	if (nla_put(skb, NDA_DST, tbl->key_len, pn->key))
		goto nla_put_failure;

	nlmsg_end(skb, nlh);
	return 0;

nla_put_failure:
	nlmsg_cancel(skb, nlh);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Tony Zelenoff 166 90.71% 1 20.00%
David S. Miller 7 3.83% 1 20.00%
Konstantin Khlebnikov 6 3.28% 1 20.00%
Johannes Berg 3 1.64% 1 20.00%
Jun Zhao 1 0.55% 1 20.00%
Total 183 100.00% 5 100.00%



static void neigh_update_notify(struct neighbour *neigh)
{
	call_netevent_notifiers(NETEVENT_NEIGH_UPDATE, neigh);
	__neigh_notify(neigh, RTM_NEWNEIGH, 0);
}

Contributors
Person Tokens Prop Commits CommitProp
Thomas Graf 27 100.00% 1 100.00%
Total 27 100.00% 1 100.00%



static bool neigh_master_filtered(struct net_device *dev, int master_idx)
{
	struct net_device *master;

	if (!master_idx)
		return false;

	master = netdev_master_upper_dev_get(dev);
	if (!master || master->ifindex != master_idx)
		return true;

	return false;
}

Contributors
Person Tokens Prop Commits CommitProp
David Ahern 51 100.00% 1 100.00%
Total 51 100.00% 1 100.00%



static bool neigh_ifindex_filtered(struct net_device *dev, int filter_idx)
{
	if (filter_idx && dev->ifindex != filter_idx)
		return true;

	return false;
}

Contributors
Person Tokens Prop Commits CommitProp
David Ahern 30 100.00% 1 100.00%
Total 30 100.00% 1 100.00%



static int neigh_dump_table(struct neigh_table *tbl, struct sk_buff *skb,
			    struct netlink_callback *cb)
{
	struct net *net = sock_net(skb->sk);
	const struct nlmsghdr *nlh = cb->nlh;
	struct nlattr *tb[NDA_MAX + 1];
	struct neighbour *n;
	int rc, h, s_h = cb->args[1];
	int idx, s_idx = idx = cb->args[2];
	struct neigh_hash_table *nht;
	int filter_master_idx = 0, filter_idx = 0;
	unsigned int flags = NLM_F_MULTI;
	int err;

	err = nlmsg_parse(nlh, sizeof(struct ndmsg), tb, NDA_MAX, NULL);
	if (!err) {
		if (tb[NDA_IFINDEX])
			filter_idx = nla_get_u32(tb[NDA_IFINDEX]);

		if (tb[NDA_MASTER])
			filter_master_idx = nla_get_u32(tb[NDA_MASTER]);

		if (filter_idx || filter_master_idx)
			flags |= NLM_F_DUMP_FILTERED;
	}

	rcu_read_lock_bh();
	nht = rcu_dereference_bh(tbl->nht);

	for (h = s_h; h < (1 << nht->hash_shift); h++) {
		if (h > s_h)
			s_idx = 0;
		for (n = rcu_dereference_bh(nht->hash_buckets[h]), idx = 0;
		     n != NULL;
		     n = rcu_dereference_bh(n->next)) {
			if (idx < s_idx || !net_eq(dev_net(n->dev), net))
				goto next;
			if (neigh_ifindex_filtered(n->dev, filter_idx) ||
			    neigh_master_filtered(n->dev, filter_master_idx))
				goto next;
			if (neigh_fill_info(skb, n, NETLINK_CB(cb->skb).portid,
					    cb->nlh->nlmsg_seq,
					    RTM_NEWNEIGH,
					    flags) < 0) {
				rc = -1;
				goto out;
			}
next:
			idx++;
		}
	}
	rc = skb->len;
out:
	rcu_read_unlock_bh();
	cb->args[1] = h;
	cb->args[2] = idx;
	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 143 37.93% 3 14.29%
David Ahern 126 33.42% 2 9.52%
Eric Dumazet 31 8.22% 3 14.29%
Arnaldo Carvalho de Melo 23 6.10% 1 4.76%
Eric W. Biedermann 17 4.51% 2 9.52%
Gautam Kachroo 8 2.12% 1 4.76%
Zhang Shengju 8 2.12% 1 4.76%
David S. Miller 8 2.12% 3 14.29%
Hideaki Yoshifuji / 吉藤英明 6 1.59% 2 9.52%
Octavian Purdila 5 1.33% 1 4.76%
Jamal Hadi Salim 1 0.27% 1 4.76%
Julian Anastasov 1 0.27% 1 4.76%
Total 377 100.00% 21 100.00%



static int pneigh_dump_table(struct neigh_table *tbl, struct sk_buff *skb,
			     struct netlink_callback *cb)
{
	struct pneigh_entry *n;
	struct net *net = sock_net(skb->sk);
	int rc, h, s_h = cb->args[3];
	int idx, s_idx = idx = cb->args[4];

	read_lock_bh(&tbl->lock);

	for (h = s_h; h <= PNEIGH_HASHMASK; h++) {
		if (h > s_h)
			s_idx = 0;
		for (n = tbl->phash_buckets[h], idx = 0; n; n = n->next) {
			if (idx < s_idx || pneigh_net(n) != net)
				goto next;
			if (pneigh_fill_info(skb, n, NETLINK_CB(cb->skb).portid,
					    cb->nlh->nlmsg_seq,
					    RTM_NEWNEIGH,
					    NLM_F_MULTI, tbl) < 0) {
				read_unlock_bh(&tbl->lock);
				rc = -1;
				goto out;
			}
		next:
			idx++;
		}
	}

	read_unlock_bh(&tbl->lock);
	rc = skb->len;
out:
	cb->args[3] = h;
	cb->args[4] = idx;
	return rc;

}

Contributors
Person Tokens Prop Commits CommitProp
Tony Zelenoff 224 96.55% 1 16.67%
Zhang Shengju 4 1.72% 1 16.67%
Eric W. Biedermann 1 0.43% 1 16.67%
Eric Dumazet 1 0.43% 1 16.67%
Konstantin Khlebnikov 1 0.43% 1 16.67%
David S. Miller 1 0.43% 1 16.67%
Total 232 100.00% 6 100.00%



static int neigh_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
{
	struct neigh_table *tbl;
	int t, family, s_t;
	int proxy = 0;
	int err;

	family = ((struct rtgenmsg *) nlmsg_data(cb->nlh))->rtgen_family;

	/* check for full ndmsg structure presence, family member is
         * the same for both structures
         */
	if (nlmsg_len(cb->nlh) >= sizeof(struct ndmsg) &&
	    ((struct ndmsg *) nlmsg_data(cb->nlh))->ndm_flags == NTF_PROXY)
		proxy = 1;

	s_t = cb->args[0];

	for (t = 0; t < NEIGH_NR_TABLES; t++) {
		tbl = neigh_tables[t];

		if (!tbl)
			continue;
		if (t < s_t || (family && tbl->family != family))
			continue;
		if (t > s_t)
			memset(&cb->args[1], 0, sizeof(cb->args) -
						sizeof(cb->args[0]));
		if (proxy)
			err = pneigh_dump_table(tbl, skb, cb);
		else
			err = neigh_dump_table(tbl, skb, cb);
		if (err < 0)
			break;
	}

	cb->args[0] = t;
	return skb->len;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 131 56.96% 2 25.00%
Tony Zelenoff 63 27.39% 1 12.50%
Américo Wang 16 6.96% 1 12.50%
Arnaldo Carvalho de Melo 11 4.78% 1 12.50%
Eric Dumazet 7 3.04% 1 12.50%
Thomas Graf 2 0.87% 2 25.00%
Total 230 100.00% 8 100.00%



void neigh_for_each(struct neigh_table *tbl, void (*cb)(struct neighbour *, void *), void *cookie)
{
	int chain;
	struct neigh_hash_table *nht;

	rcu_read_lock_bh();
	nht = rcu_dereference_bh(tbl->nht);

	read_lock(&tbl->lock); /* avoid resizes */
	for (chain = 0; chain < (1 << nht->hash_shift); chain++) {
		struct neighbour *n;

		for (n = rcu_dereference_bh(nht->hash_buckets[chain]);
		     n != NULL;
		     n = rcu_dereference_bh(n->next))
			cb(n, cookie);
	}
	read_unlock(&tbl->lock);
	rcu_read_unlock_bh();
}
Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 95 74.22% 3 60.00%
Eric Dumazet 33 25.78% 2 40.00%
Total 128 100.00% 5 100.00%


EXPORT_SYMBOL(neigh_for_each);

/* The tbl->lock must be held as a writer and BH disabled. */


void __neigh_for_each_release(struct neigh_table *tbl,
			      int (*cb)(struct neighbour *))
{
	int chain;
	struct neigh_hash_table *nht;

	nht = rcu_dereference_protected(tbl->nht,
					lockdep_is_held(&tbl->lock));
	for (chain = 0; chain < (1 << nht->hash_shift); chain++) {
		struct neighbour *n;
		struct neighbour __rcu **np;

		np = &nht->hash_buckets[chain];
		while ((n = rcu_dereference_protected(*np,
					lockdep_is_held(&tbl->lock))) != NULL) {
			int release;

			write_lock(&n->lock);
			release = cb(n);
			if (release) {
				rcu_assign_pointer(*np,
					rcu_dereference_protected(n->next,
						lockdep_is_held(&tbl->lock)));
				n->dead = 1;
			} else
				np = &n->next;
			write_unlock(&n->lock);
			if (release)
				neigh_cleanup_and_release(n);
		}
	}
}
Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 129 68.25% 3 42.86%
Eric Dumazet 54 28.57% 2 28.57%
Alexey Kuznetsov 5 2.65% 1 14.29%
Thomas Graf 1 0.53% 1 14.29%
Total 189 100.00% 7 100.00%


EXPORT_SYMBOL(__neigh_for_each_release);



int neigh_xmit(int index, struct net_device *dev,
	       const void *addr, struct sk_buff *skb)
{
	int err = -EAFNOSUPPORT;
	if (likely(index < NEIGH_NR_TABLES)) {
		struct neigh_table *tbl;
		struct neighbour *neigh;

		tbl = neigh_tables[index];
		if (!tbl)
			goto out;
		rcu_read_lock_bh();
		neigh = __neigh_lookup_noref(tbl, addr, dev);
		if (!neigh)
			neigh = __neigh_create(tbl, addr, dev, false);
		err = PTR_ERR(neigh);
		if (IS_ERR(neigh)) {
			rcu_read_unlock_bh();
			goto out_kfree_skb;
		}
		err = neigh->output(neigh, skb);
		rcu_read_unlock_bh();
	}
	else if (index == NEIGH_LINK_TABLE) {
		err = dev_hard_header(skb, dev, ntohs(skb->protocol),
				      addr, NULL, skb->len);
		if (err < 0)
			goto out_kfree_skb;
		err = dev_queue_xmit(skb);
	}
out:
	return err;
out_kfree_skb:
	kfree_skb(skb);
	goto out;
}
Contributors
Person Tokens Prop Commits CommitProp
Eric W. Biedermann 186 94.42% 2 66.67%
David Barroso 11 5.58% 1 33.33%
Total 197 100.00% 3 100.00%


EXPORT_SYMBOL(neigh_xmit);

#ifdef CONFIG_PROC_FS



static struct neighbour *neigh_get_first(struct seq_file *seq)
{
	struct neigh_seq_state *state = seq->private;
	struct net *net = seq_file_net(seq);
	struct neigh_hash_table *nht = state->nht;
	struct neighbour *n = NULL;
	int bucket = state->bucket;

	state->flags &= ~NEIGH_SEQ_IS_PNEIGH;
	for (bucket = 0; bucket < (1 << nht->hash_shift); bucket++) {
		n = rcu_dereference_bh(nht->hash_buckets[bucket]);

		while (n) {
			if (!net_eq(dev_net(n->dev), net))
				goto next;
			if (state->neigh_sub_iter) {
				loff_t fakep = 0;
				void *v;

				v = state->neigh_sub_iter(state, n, &fakep);
				if (!v)
					goto next;
			}
			if (!(state->flags & NEIGH_SEQ_SKIP_NOARP))
				break;
			if (n->nud_state & ~NUD_NOARP)
				break;
next:
			n = rcu_dereference_bh(n->next);
		}

		if (n)
			break;
	}
	state->bucket = bucket;

	return n;
}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 166 80.98% 3 33.33%
Eric W. Biedermann 16 7.80% 1 11.11%
Hideaki Yoshifuji / 吉藤英明 12 5.85% 3 33.33%
Eric Dumazet 11 5.37% 2 22.22%
Total 205 100.00% 9 100.00%



static struct neighbour *neigh_get_next(struct seq_file *seq,
					struct neighbour *n,
					loff_t *pos)
{
	struct neigh_seq_state *state = seq->private;
	struct net *net = seq_file_net(seq);
	struct neigh_hash_table *nht = state->nht;

	if (state->neigh_sub_iter) {
		void *v = state->neigh_sub_iter(state, n, pos);
		if (v)
			return n;
	}
	n = rcu_dereference_bh(n->next);

	while (1) {
		while (n) {
			if (!net_eq(dev_net(n->dev), net))
				goto next;
			if (state->neigh_sub_iter) {
				void *v = state->neigh_sub_iter(state, n, pos);
				if (v)
					return n;
				goto next;
			}
			if (!(state->flags & NEIGH_SEQ_SKIP_NOARP))
				break;

			if (n->nud_state & ~NUD_NOARP)
				break;
next:
			n = rcu_dereference_bh(n->next);
		}

		if (n)
			break;

		if (++state->bucket >= (1 << nht->hash_shift))
			break;

		n = rcu_dereference_bh(nht->hash_buckets[state->bucket]);
	}

	if (n && pos)
		--(*pos);
	return n;
}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 193 82.13% 3 33.33%
Eric W. Biedermann 16 6.81% 1 11.11%
Eric Dumazet 14 5.96% 2 22.22%
Hideaki Yoshifuji / 吉藤英明 12 5.11% 3 33.33%
Total 235 100.00% 9 100.00%



static struct neighbour *neigh_get_idx(struct seq_file *seq, loff_t *pos)
{
	struct neighbour *n = neigh_get_first(seq);

	if (n) {
		--(*pos);
		while (*pos) {
			n = neigh_get_next(seq, n, pos);
			if (!n)
				break;
		}
	}
	return *pos ? NULL : n;
}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 65 91.55% 1 50.00%
Chris Larson 6 8.45% 1 50.00%
Total 71 100.00% 2 100.00%



static struct pneigh_entry *pneigh_get_first(struct seq_file *seq)
{
	struct neigh_seq_state *state = seq->private;
	struct net *net = seq_file_net(seq);
	struct neigh_table *tbl = state->tbl;
	struct pneigh_entry *pn = NULL;
	int bucket = state->bucket;

	state->flags |= NEIGH_SEQ_IS_PNEIGH;
	for (bucket = 0; bucket <= PNEIGH_HASHMASK; bucket++) {
		pn = tbl->phash_buckets[bucket];
		while (pn && !net_eq(pneigh_net(pn), net))
			pn = pn->next;
		if (pn)
			break;
	}
	state->bucket = bucket;

	return pn;
}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 89 74.17% 1 20.00%
Eric W. Biedermann 19 15.83% 1 20.00%
Hideaki Yoshifuji / 吉藤英明 12 10.00% 3 60.00%
Total 120 100.00% 5 100.00%



static struct pneigh_entry *pneigh_get_next(struct seq_file *seq,
					    struct pneigh_entry *pn,
					    loff_t *pos)
{
	struct neigh_seq_state *state = seq->private;
	struct net *net = seq_file_net(seq);
	struct neigh_table *tbl = state->tbl;

	do {
		pn = pn->next;
	} while (pn && !net_eq(pneigh_net(pn), net));

	while (!pn) {
		if (++state->bucket > PNEIGH_HASHMASK)
			break;
		pn = tbl->phash_buckets[state->bucket];
		while (pn && !net_eq(pneigh_net(pn), net))
			pn = pn->next;
		if (pn)
			break;
	}

	if (pn && pos)
		--(*pos);

	return pn;
}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 94 65.28% 1 16.67%
Eric W. Biedermann 19 13.19% 1 16.67%
Jorge Boncompte 19 13.19% 1 16.67%
Hideaki Yoshifuji / 吉藤英明 12 8.33% 3 50.00%
Total 144 100.00% 6 100.00%



static struct pneigh_entry *pneigh_get_idx(struct seq_file *seq, loff_t *pos)
{
	struct pneigh_entry *pn = pneigh_get_first(seq);

	if (pn) {
		--(*pos);
		while (*pos) {
			pn = pneigh_get_next(seq, pn, pos);
			if (!pn)
				break;
		}
	}
	return *pos ? NULL : pn;
}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 65 91.55% 1 50.00%
Chris Larson 6 8.45% 1 50.00%
Total 71 100.00% 2 100.00%



static void *neigh_get_idx_any(struct seq_file *seq, loff_t *pos)
{
	struct neigh_seq_state *state = seq->private;
	void *rc;
	loff_t idxpos = *pos;

	rc = neigh_get_idx(seq, &idxpos);
	if (!rc && !(state->flags & NEIGH_SEQ_NEIGH_ONLY))
		rc = pneigh_get_idx(seq, &idxpos);

	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 62 86.11% 1 50.00%
Chris Larson 10 13.89% 1 50.00%
Total 72 100.00% 2 100.00%


void *neigh_seq_start(struct seq_file *seq, loff_t *pos, struct neigh_table *tbl, unsigned int neigh_seq_flags)
	__acquires
(rcu_bh)
{
	struct neigh_seq_state *state = seq->private;

	state->tbl = tbl;
	state->bucket = 0;
	state->flags = (neigh_seq_flags & ~NEIGH_SEQ_IS_PNEIGH);

	rcu_read_lock_bh();
	state->nht = rcu_dereference_bh(tbl->nht);

	return *pos ? neigh_get_idx_any(seq, pos) : SEQ_START_TOKEN;
}
Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 68 78.16% 1 25.00%
Eric Dumazet 18 20.69% 2 50.00%
Chris Larson 1 1.15% 1 25.00%
Total 87 100.00% 4 100.00%


EXPORT_SYMBOL(neigh_seq_start);



void *neigh_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct neigh_seq_state *state;
	void *rc;

	if (v == SEQ_START_TOKEN) {
		rc = neigh_get_first(seq);
		goto out;
	}

	state = seq->private;
	if (!(state->flags & NEIGH_SEQ_IS_PNEIGH)) {
		rc = neigh_get_next(seq, v, NULL);
		if (rc)
			goto out;
		if (!(state->flags & NEIGH_SEQ_NEIGH_ONLY))
			rc = pneigh_get_first(seq);
	} else {
		BUG_ON(state->flags & NEIGH_SEQ_NEIGH_ONLY);
		rc = pneigh_get_next(seq, v, NULL);
	}
out:
	++(*pos);
	return rc;
}
Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 134 99.26% 1 50.00%
Chris Larson 1 0.74% 1 50.00%
Total 135 100.00% 2 100.00%


EXPORT_SYMBOL(neigh_seq_next);


void neigh_seq_stop(struct seq_file *seq, void *v)
	__releases
(rcu_bh)
{
	rcu_read_unlock_bh();
}
Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 14 66.67% 1 33.33%
Eric Dumazet 7 33.33% 2 66.67%
Total 21 100.00% 3 100.00%


EXPORT_SYMBOL(neigh_seq_stop);

/* statistics via seq_file */



static void *neigh_stat_seq_start(struct seq_file *seq, loff_t *pos)
{
	struct neigh_table *tbl = seq->private;
	int cpu;

	if (*pos == 0)
		return SEQ_START_TOKEN;

	for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
		if (!cpu_possible(cpu))
			continue;
		*pos = cpu+1;
		return per_cpu_ptr(tbl->stats, cpu);
	}
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 82 96.47% 1 33.33%
Alexey Dobriyan 2 2.35% 1 33.33%
Rusty Russell 1 1.18% 1 33.33%
Total 85 100.00% 3 100.00%



static void *neigh_stat_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct neigh_table *tbl = seq->private;
	int cpu;

	for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
		if (!cpu_possible(cpu))
			continue;
		*pos = cpu+1;
		return per_cpu_ptr(tbl->stats, cpu);
	}
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 74 96.10% 1 33.33%
Alexey Dobriyan 2 2.60% 1 33.33%
Rusty Russell 1 1.30% 1 33.33%
Total 77 100.00% 3 100.00%



static void neigh_stat_seq_stop(struct seq_file *seq, void *v)
{

}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 14 100.00% 1 100.00%
Total 14 100.00% 1 100.00%



static int neigh_stat_seq_show(struct seq_file *seq, void *v)
{
	struct neigh_table *tbl = seq->private;
	struct neigh_statistics *st = v;

	if (v == SEQ_START_TOKEN) {
		seq_printf(seq, "entries  allocs destroys hash_grows  lookups hits  res_failed  rcv_probes_mcast rcv_probes_ucast  periodic_gc_runs forced_gc_runs unresolved_discards table_fulls\n");
		return 0;
	}

	seq_printf(seq, "%08x  %08lx %08lx %08lx  %08lx %08lx  %08lx  "
			"%08lx %08lx  %08lx %08lx %08lx %08lx\n",
		   atomic_read(&tbl->entries),

		   st->allocs,
		   st->destroys,
		   st->hash_grows,

		   st->lookups,
		   st->hits,

		   st->res_failed,

		   st->rcv_probes_mcast,
		   st->rcv_probes_ucast,

		   st->periodic_gc_runs,
		   st->forced_gc_runs,
		   st->unres_discards,
		   st->table_fulls
		   );

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 100 86.21% 1 20.00%
Rick Jones 6 5.17% 1 20.00%
Herbert Xu 4 3.45% 1 20.00%
Neil Horman 4 3.45% 1 20.00%
Alexey Dobriyan 2 1.72% 1 20.00%
Total 116 100.00% 5 100.00%


static const struct seq_operations neigh_stat_seq_ops = {
	.start	= neigh_stat_seq_start,
	.next	= neigh_stat_seq_next,
	.stop	= neigh_stat_seq_stop,
	.show	= neigh_stat_seq_show,
};



static int neigh_stat_seq_open(struct inode *inode, struct file *file)
{
	int ret = seq_open(file, &neigh_stat_seq_ops);

	if (!ret) {
		struct seq_file *sf = file->private_data;
		sf->private = PDE_DATA(inode);
	}
	return ret;
}Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 54 98.18% 1 50.00%
Al Viro 1 1.82% 1 50.00%
Total 55 100.00% 2 100.00%

;


static const struct file_operations neigh_stat_seq_fops = {
	.owner	 = THIS_MODULE,
	.open 	 = neigh_stat_seq_open,
	.read	 = seq_read,
	.llseek	 = seq_lseek,
	.release = seq_release,
};

#endif /* CONFIG_PROC_FS */



static inline size_t neigh_nlmsg_size(void)
{
	return NLMSG_ALIGN(sizeof(struct ndmsg))
	       + nla_total_size(MAX_ADDR_LEN) /* NDA_DST */
	       + nla_total_size(MAX_ADDR_LEN) /* NDA_LLADDR */
	       + nla_total_size(sizeof(struct nda_cacheinfo))
	       + nla_total_size(4); /* NDA_PROBES */
}

Contributors
Person Tokens Prop Commits CommitProp
Thomas Graf 46 100.00% 1 100.00%
Total 46 100.00% 1 100.00%



static void __neigh_notify(struct neighbour *n, int type, int flags)
{
	struct net *net = dev_net(n->dev);
	struct sk_buff *skb;
	int err = -ENOBUFS;

	skb = nlmsg_new(neigh_nlmsg_size(), GFP_ATOMIC);
	if (skb == NULL)
		goto errout;

	err = neigh_fill_info(skb, n, 0, 0, type, flags);
	if (err < 0) {
		/* -EMSGSIZE implies BUG in neigh_nlmsg_size() */
		WARN_ON(err == -EMSGSIZE);
		kfree_skb(skb);
		goto errout;
	}
	rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
	return;
errout:
	if (err < 0)
		rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
}

Contributors
Person Tokens Prop Commits CommitProp
Thomas Graf 52 38.81% 3 25.00%
Linus Torvalds (pre-git) 41 30.60% 1 8.33%
Patrick McHardy 21 15.67% 2 16.67%
Eric W. Biedermann 11 8.21% 1 8.33%
Hideaki Yoshifuji / 吉藤英明 3 2.24% 1 8.33%
Denis V. Lunev 2 1.49% 1 8.33%
Arnaldo Carvalho de Melo 2 1.49% 1 8.33%
Pablo Neira Ayuso 1 0.75% 1 8.33%
Jamal Hadi Salim 1 0.75% 1 8.33%
Total 134 100.00% 12 100.00%



void neigh_app_ns(struct neighbour *n)
{
	__neigh_notify(n, RTM_GETNEIGH, NLM_F_REQUEST);
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 13 68.42% 1 33.33%
Thomas Graf 5 26.32% 1 33.33%
Jamal Hadi Salim 1 5.26% 1 33.33%
Total 19 100.00% 3 100.00%


EXPORT_SYMBOL(neigh_app_ns);

#ifdef CONFIG_SYSCTL

static int zero;

static int int_max = INT_MAX;

static int unres_qlen_max = INT_MAX / SKB_TRUESIZE(ETH_FRAME_LEN);



static int proc_unres_qlen(struct ctl_table *ctl, int write,
			   void __user *buffer, size_t *lenp, loff_t *ppos)
{
	int size, ret;
	struct ctl_table tmp = *ctl;

	tmp.extra1 = &zero;
	tmp.extra2 = &unres_qlen_max;
	tmp.data = &size;

	size = *(int *)ctl->data / SKB_TRUESIZE(ETH_FRAME_LEN);
	ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);

	if (write && !ret)
		*(int *)ctl->data = size * SKB_TRUESIZE(ETH_FRAME_LEN);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Eric Dumazet 100 84.75% 1 33.33%
Shan Wei 16 13.56% 1 33.33%
Joe Perches 2 1.69% 1 33.33%
Total 118 100.00% 3 100.00%



static struct neigh_parms *neigh_get_dev_parms_rcu(struct net_device *dev,
						   int family)
{
	switch (family) {
	case AF_INET:
		return __in_dev_arp_parms_get_rcu(dev);
	case AF_INET6:
		return __in6_dev_nd_parms_get_rcu(dev);
	}
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Jiri Pirko 43 100.00% 2 100.00%
Total 43 100.00% 2 100.00%



static void neigh_copy_dflt_parms(struct net *net, struct neigh_parms *p,
				  int index)
{
	struct net_device *dev;
	int family = neigh_parms_family(p);

	rcu_read_lock();
	for_each_netdev_rcu(net, dev) {
		struct neigh_parms *dst_p =
				neigh_get_dev_parms_rcu(dev, family);

		if (dst_p && !test_bit(index, dst_p->data_state))
			dst_p->data[index] = p->data[index];
	}
	rcu_read_unlock();
}

Contributors
Person Tokens Prop Commits CommitProp
Jiri Pirko 86 100.00% 1 100.00%
Total 86 100.00% 1 100.00%



static void neigh_proc_update(struct ctl_table *ctl, int write)
{
	struct net_device *dev = ctl->extra1;
	struct neigh_parms *p = ctl->extra2;
	struct net *net = neigh_parms_net(p);
	int index = (int *) ctl->data - p->data;

	if (!write)
		return;

	set_bit(index, p->data_state);
	if (index == NEIGH_VAR_DELAY_PROBE_TIME)
		call_netevent_notifiers(NETEVENT_DELAY_PROBE_TIME_UPDATE, p);
	if (!dev) /* NULL dev means this is default value */
		neigh_copy_dflt_parms(net, p, index);
}

Contributors
Person Tokens Prop Commits CommitProp
Jiri Pirko 87 87.00% 2 50.00%
Ido Schimmel 7 7.00% 1 25.00%
Marcus Huewe 6 6.00% 1 25.00%
Total 100 100.00% 4 100.00%



static int neigh_proc_dointvec_zero_intmax(struct ctl_table *ctl, int write,
					   void __user *buffer,
					   size_t *lenp, loff_t *ppos)
{
	struct ctl_table tmp = *ctl;
	int ret;

	tmp.extra1 = &zero;
	tmp.extra2 = &int_max;

	ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
	neigh_proc_update(ctl, write);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Jiri Pirko 75 97.40% 2 66.67%
Eric Dumazet 2 2.60% 1 33.33%
Total 77 100.00% 3 100.00%



int neigh_proc_dointvec(struct ctl_table *ctl, int write,
			void __user *buffer, size_t *lenp, loff_t *ppos)
{
	int ret = proc_dointvec(ctl, write, buffer, lenp, ppos);

	neigh_proc_update(ctl, write);
	return ret;
}
Contributors
Person Tokens Prop Commits CommitProp
Jiri Pirko 52 100.00% 2 100.00%
Total 52 100.00% 2 100.00%


EXPORT_SYMBOL(neigh_proc_dointvec);



int neigh_proc_dointvec_jiffies(struct ctl_table *ctl, int write,
				void __user *buffer,
				size_t *lenp, loff_t *ppos)
{
	int ret = proc_dointvec_jiffies(ctl, write, buffer, lenp, ppos);

	neigh_proc_update(ctl, write);
	return ret;
}
Contributors
Person Tokens Prop Commits CommitProp
Jiri Pirko 52 100.00% 2 100.00%
Total 52 100.00% 2 100.00%


EXPORT_SYMBOL(neigh_proc_dointvec_jiffies);



static int neigh_proc_dointvec_userhz_jiffies(struct ctl_table *ctl, int write,
					      void __user *buffer,
					      size_t *lenp, loff_t *ppos)
{
	int ret = proc_dointvec_userhz_jiffies(ctl, write, buffer, lenp, ppos);

	neigh_proc_update(ctl, write);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Jiri Pirko 53 100.00% 2 100.00%
Total 53 100.00% 2 100.00%



int neigh_proc_dointvec_ms_jiffies(struct ctl_table *ctl, int write,
				   void __user *buffer,
				   size_t *lenp, loff_t *ppos)
{
	int ret = proc_dointvec_ms_jiffies(ctl, write, buffer, lenp, ppos);

	neigh_proc_update(ctl, write);
	return ret;
}
Contributors
Person Tokens Prop Commits CommitProp
Jiri Pirko 52 100.00% 2 100.00%
Total 52 100.00% 2 100.00%


EXPORT_SYMBOL(neigh_proc_dointvec_ms_jiffies);



static int neigh_proc_dointvec_unres_qlen(struct ctl_table *ctl, int write,
					  void __user *buffer,
					  size_t *lenp, loff_t *ppos)
{
	int ret = proc_unres_qlen(ctl, write, buffer, lenp, ppos);

	neigh_proc_update(ctl, write);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Jiri Pirko 53 100.00% 2 100.00%
Total 53 100.00% 2 100.00%



static int neigh_proc_base_reachable_time(struct ctl_table *ctl, int write,
					  void __user *buffer,
					  size_t *lenp, loff_t *ppos)
{
	struct neigh_parms *p = ctl->extra2;
	int ret;

	if (strcmp(ctl->procname, "base_reachable_time") == 0)
		ret = neigh_proc_dointvec_jiffies(ctl, write, buffer, lenp, ppos);
	else if (strcmp(ctl->procname, "base_reachable_time_ms") == 0)
		ret = neigh_proc_dointvec_ms_jiffies(ctl, write, buffer, lenp, ppos);
	else
		ret = -1;

	if (write && ret == 0) {
		/* update reachable_time as well, otherwise, the change will
                 * only be effective after the next time neigh_periodic_work
                 * decides to recompute it
                 */
		p->reachable_time =
			neigh_rand_reach_time(NEIGH_VAR(p, BASE_REACHABLE_TIME));
	}
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Jean-Francois Remy 130 100.00% 1 100.00%
Total 130 100.00% 1 100.00%


#define NEIGH_PARMS_DATA_OFFSET(index)	\
	(&((struct neigh_parms *) 0)->data[index])


#define NEIGH_SYSCTL_ENTRY(attr, data_attr, name, mval, proc) \
	[NEIGH_VAR_ ## attr] = { \
                .procname       = name, \
                .data           = NEIGH_PARMS_DATA_OFFSET(NEIGH_VAR_ ## data_attr), \
                .maxlen         = sizeof(int), \
                .mode           = mval, \
                .proc_handler   = proc, \
        }


#define NEIGH_SYSCTL_ZERO_INTMAX_ENTRY(attr, name) \
	NEIGH_SYSCTL_ENTRY(attr, attr, name, 0644, neigh_proc_dointvec_zero_intmax)


#define NEIGH_SYSCTL_JIFFIES_ENTRY(attr, name) \
	NEIGH_SYSCTL_ENTRY(attr, attr, name, 0644, neigh_proc_dointvec_jiffies)


#define NEIGH_SYSCTL_USERHZ_JIFFIES_ENTRY(attr, name) \
	NEIGH_SYSCTL_ENTRY(attr, attr, name, 0644, neigh_proc_dointvec_userhz_jiffies)


#define NEIGH_SYSCTL_MS_JIFFIES_ENTRY(attr, name) \
	NEIGH_SYSCTL_ENTRY(attr, attr, name, 0644, neigh_proc_dointvec_ms_jiffies)


#define NEIGH_SYSCTL_MS_JIFFIES_REUSED_ENTRY(attr, data_attr, name) \
	NEIGH_SYSCTL_ENTRY(attr, data_attr, name, 0644, neigh_proc_dointvec_ms_jiffies)


#define NEIGH_SYSCTL_UNRES_QLEN_REUSED_ENTRY(attr, data_attr, name) \
	NEIGH_SYSCTL_ENTRY(attr, data_attr, name, 0644, neigh_proc_dointvec_unres_qlen)


static struct neigh_sysctl_table {
	
struct ctl_table_header *sysctl_header;
	
struct ctl_table neigh_vars[NEIGH_VAR_MAX + 1];
} 
neigh_sysctl_template __read_mostly = {
	.neigh_vars = {
		NEIGH_SYSCTL_ZERO_INTMAX_ENTRY(MCAST_PROBES, "mcast_solicit"),
		NEIGH_SYSCTL_ZERO_INTMAX_ENTRY(UCAST_PROBES, "ucast_solicit"),
		NEIGH_SYSCTL_ZERO_INTMAX_ENTRY(APP_PROBES, "app_solicit"),
		NEIGH_SYSCTL_ZERO_INTMAX_ENTRY(MCAST_REPROBES, "mcast_resolicit"),
		NEIGH_SYSCTL_USERHZ_JIFFIES_ENTRY(RETRANS_TIME, "retrans_time"),
		NEIGH_SYSCTL_JIFFIES_ENTRY(BASE_REACHABLE_TIME, "base_reachable_time"),
		NEIGH_SYSCTL_JIFFIES_ENTRY(DELAY_PROBE_TIME, "delay_first_probe_time"),
		NEIGH_SYSCTL_JIFFIES_ENTRY(GC_STALETIME, "gc_stale_time"),
		NEIGH_SYSCTL_ZERO_INTMAX_ENTRY(QUEUE_LEN_BYTES, "unres_qlen_bytes"),
		NEIGH_SYSCTL_ZERO_INTMAX_ENTRY(PROXY_QLEN, "proxy_qlen"),
		NEIGH_SYSCTL_USERHZ_JIFFIES_ENTRY(ANYCAST_DELAY, "anycast_delay"),
		NEIGH_SYSCTL_USERHZ_JIFFIES_ENTRY(PROXY_DELAY, "proxy_delay"),
		NEIGH_SYSCTL_USERHZ_JIFFIES_ENTRY(LOCKTIME, "locktime"),
		NEIGH_SYSCTL_UNRES_QLEN_REUSED_ENTRY(QUEUE_LEN, QUEUE_LEN_BYTES, "unres_qlen"),
		NEIGH_SYSCTL_MS_JIFFIES_REUSED_ENTRY(RETRANS_TIME_MS, RETRANS_TIME, "retrans_time_ms"),
		NEIGH_SYSCTL_MS_JIFFIES_REUSED_ENTRY(BASE_REACHABLE_TIME_MS, BASE_REACHABLE_TIME, "base_reachable_time_ms"),
		[NEIGH_VAR_GC_INTERVAL] = {
			.procname	= "gc_interval",
			.maxlen		= sizeof(int),
			.mode		= 0644,
			.proc_handler	= proc_dointvec_jiffies,
                },
		[NEIGH_VAR_GC_THRESH1] = {
			.procname	= "gc_thresh1",
			.maxlen		= sizeof(int),
			.mode		= 0644,
			.extra1 	= &zero,
			.extra2		= &int_max,
			.proc_handler	= proc_dointvec_minmax,
                },
		[NEIGH_VAR_GC_THRESH2] = {
			.procname	= "gc_thresh2",
			.maxlen		= sizeof(int),
			.mode		= 0644,
			.extra1 	= &zero,
			.extra2		= &int_max,
			.proc_handler	= proc_dointvec_minmax,
                },
		[NEIGH_VAR_GC_THRESH3] = {
			.procname	= "gc_thresh3",
			.maxlen		= sizeof(int),
			.mode		= 0644,
			.extra1 	= &zero,
			.extra2		= &int_max,
			.proc_handler	= proc_dointvec_minmax,
                },
		{},
        },
};



int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p,
			  proc_handler *handler)
{
	int i;
	struct neigh_sysctl_table *t;
	const char *dev_name_source;
	char neigh_path[ sizeof("net//neigh/") + IFNAMSIZ + IFNAMSIZ ];
	char *p_name;

	t = kmemdup(&neigh_sysctl_template, sizeof(*t), GFP_KERNEL);
	if (!t)
		goto err;

	for (i = 0; i < NEIGH_VAR_GC_INTERVAL; i++) {
		t->neigh_vars[i].data += (long) p;
		t->neigh_vars[i].extra1 = dev;
		t->neigh_vars[i].extra2 = p;
	}

	if (dev) {
		dev_name_source = dev->name;
		/* Terminate the table early */
		memset(&t->neigh_vars[NEIGH_VAR_GC_INTERVAL], 0,
		       sizeof(t->neigh_vars[NEIGH_VAR_GC_INTERVAL]));
	} else {
		struct neigh_table *tbl = p->tbl;
		dev_name_source = "default";
		t->neigh_vars[NEIGH_VAR_GC_INTERVAL].data = &tbl->gc_interval;
		t->neigh_vars[NEIGH_VAR_GC_THRESH1].data = &tbl->gc_thresh1;
		t->neigh_vars[NEIGH_VAR_GC_THRESH2].data = &tbl->gc_thresh2;
		t->neigh_vars[NEIGH_VAR_GC_THRESH3].data = &tbl->gc_thresh3;
	}

	if (handler) {
		/* RetransTime */
		t->neigh_vars[NEIGH_VAR_RETRANS_TIME].proc_handler = handler;
		/* ReachableTime */
		t->neigh_vars[NEIGH_VAR_BASE_REACHABLE_TIME].proc_handler = handler;
		/* RetransTime (in milliseconds)*/
		t->neigh_vars[NEIGH_VAR_RETRANS_TIME_MS].proc_handler = handler;
		/* ReachableTime (in milliseconds) */
		t->neigh_vars[NEIGH_VAR_BASE_REACHABLE_TIME_MS].proc_handler = handler;
	} else {
		/* Those handlers will update p->reachable_time after
                 * base_reachable_time(_ms) is set to ensure the new timer starts being
                 * applied after the next neighbour update instead of waiting for
                 * neigh_periodic_work to update its value (can be multiple minutes)
                 * So any handler that replaces them should do this as well
                 */
		/* ReachableTime */
		t->neigh_vars[NEIGH_VAR_BASE_REACHABLE_TIME].proc_handler =
			neigh_proc_base_reachable_time;
		/* ReachableTime (in milliseconds) */
		t->neigh_vars[NEIGH_VAR_BASE_REACHABLE_TIME_MS].proc_handler =
			neigh_proc_base_reachable_time;
	}

	/* Don't export sysctls to unprivileged users */
	if (neigh_parms_net(p)->user_ns != &init_user_ns)
		t->neigh_vars[0].procname = NULL;

	switch (neigh_parms_family(p)) {
	case AF_INET:
	      p_name = "ipv4";
	      break;
	case AF_INET6:
	      p_name = "ipv6";
	      break;
	default:
	      BUG();
	}

	snprintf(neigh_path, sizeof(neigh_path), "net/%s/neigh/%s",
		p_name, dev_name_source);
	t->sysctl_header =
		register_net_sysctl(neigh_parms_net(p), neigh_path, t->neigh_vars);
	if (!t->sysctl_header)
		goto free;

	p->sysctl_table = t;
	return 0;

free:
	kfree(t);
err:
	return -ENOBUFS;
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 97 22.40% 4 17.39%
Jiri Pirko 77 17.78% 5 21.74%
Eric W. Biedermann 69 15.94% 3 13.04%
Hideaki Yoshifuji / 吉藤英明 66 15.24% 2 8.70%
Pavel Emelyanov 29 6.70% 2 8.70%
Jean-Francois Remy 28 6.47% 1 4.35%
Mathias Krause 25 5.77% 1 4.35%
Dan Aloni 24 5.54% 1 4.35%
Eric Dumazet 10 2.31% 1 4.35%
Arnaldo Carvalho de Melo 3 0.69% 1 4.35%
Shirley Ma 3 0.69% 1 4.35%
Denis V. Lunev 2 0.46% 1 4.35%
Total 433 100.00% 23 100.00%


EXPORT_SYMBOL(neigh_sysctl_register);



void neigh_sysctl_unregister(struct neigh_parms *p)
{
	if (p->sysctl_table) {
		struct neigh_sysctl_table *t = p->sysctl_table;
		p->sysctl_table = NULL;
		unregister_net_sysctl_table(t->sysctl_header);
		kfree(t);
	}
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 44 97.78% 2 66.67%
Eric W. Biedermann 1 2.22% 1 33.33%
Total 45 100.00% 3 100.00%


EXPORT_SYMBOL(neigh_sysctl_unregister);

#endif	/* CONFIG_SYSCTL */



static int __init neigh_init(void)
{
	rtnl_register(PF_UNSPEC, RTM_NEWNEIGH, neigh_add, NULL, NULL);
	rtnl_register(PF_UNSPEC, RTM_DELNEIGH, neigh_delete, NULL, NULL);
	rtnl_register(PF_UNSPEC, RTM_GETNEIGH, NULL, neigh_dump_info, NULL);

	rtnl_register(PF_UNSPEC, RTM_GETNEIGHTBL, NULL, neightbl_dump_info,
		      NULL);
	rtnl_register(PF_UNSPEC, RTM_SETNEIGHTBL, neightbl_set, NULL, NULL);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Thomas Graf 67 87.01% 1 50.00%
Greg Rose 10 12.99% 1 50.00%
Total 77 100.00% 2 100.00%


subsys_initcall(neigh_init);

Overall Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 4347 26.25% 18 6.95%
David S. Miller 2704 16.33% 35 13.51%
Thomas Graf 2422 14.63% 17 6.56%
Eric Dumazet 1347 8.14% 19 7.34%
Jiri Pirko 1092 6.60% 8 3.09%
Hideaki Yoshifuji / 吉藤英明 1026 6.20% 22 8.49%
Eric W. Biedermann 549 3.32% 13 5.02%
Tony Zelenoff 453 2.74% 1 0.39%
Arnaldo Carvalho de Melo 238 1.44% 4 1.54%
Herbert Xu 236 1.43% 5 1.93%
Américo Wang 218 1.32% 2 0.77%
David Ahern 207 1.25% 2 0.77%
Pavel Emelyanov 200 1.21% 8 3.09%
Jean-Francois Remy 173 1.04% 1 0.39%
Timo Teräs 131 0.79% 2 0.77%
Nicolas Dichtel 88 0.53% 3 1.16%
Patrick McHardy 88 0.53% 5 1.93%
Joe Perches 71 0.43% 3 1.16%
Jiri Benc 67 0.40% 1 0.39%
Denis V. Lunev 66 0.40% 6 2.32%
Julian Anastasov 62 0.37% 3 1.16%
Hideaki Yoshifuji/吉藤英明 62 0.37% 1 0.39%
Gao Feng 53 0.32% 3 1.16%
Francesco Fusco 47 0.28% 1 0.39%
Stephen Hemminger 38 0.23% 7 2.70%
Rick Jones 32 0.19% 1 0.39%
Veaceslav Falico 30 0.18% 1 0.39%
Mathias Krause 25 0.15% 1 0.39%
Ville Nuorvala 24 0.14% 1 0.39%
Dan Aloni 24 0.14% 1 0.39%
Chris Larson 24 0.14% 2 0.77%
Duan Jiong 22 0.13% 3 1.16%
Ido Schimmel 21 0.13% 2 0.77%
Erik Kline 20 0.12% 1 0.39%
Rusty Russell 20 0.12% 2 0.77%
Alexey Dobriyan 20 0.12% 3 1.16%
Jorge Boncompte 19 0.11% 1 0.39%
Tom Tucker 19 0.11% 1 0.39%
Andrew Morton 19 0.11% 3 1.16%
Michel Machado 17 0.10% 1 0.39%
Shan Wei 17 0.10% 1 0.39%
Gautam Kachroo 16 0.10% 1 0.39%
Kirill Korotaev 13 0.08% 1 0.39%
Neil Horman 13 0.08% 1 0.39%
Doug Kehn 13 0.08% 1 0.39%
Zhang Shengju 12 0.07% 1 0.39%
ramesh.nagappa@gmail.com 12 0.07% 1 0.39%
Johannes Berg 12 0.07% 1 0.39%
David Barroso 11 0.07% 1 0.39%
Greg Rose 10 0.06% 1 0.39%
Jamal Hadi Salim 9 0.05% 1 0.39%
Arjan van de Ven 8 0.05% 2 0.77%
Konstantin Khlebnikov 7 0.04% 1 0.39%
Viresh Kumar 6 0.04% 1 0.39%
Li RongQing 6 0.04% 1 0.39%
Krishna Kumar 6 0.04% 1 0.39%
Marcus Huewe 6 0.04% 1 0.39%
Amos Waterland 5 0.03% 1 0.39%
Tejun Heo 5 0.03% 3 1.16%
Alexey Kuznetsov 5 0.03% 1 0.39%
Octavian Purdila 5 0.03% 1 0.39%
Harald Welte 4 0.02% 1 0.39%
Bob Gilligan 4 0.02% 1 0.39%
Shirley Ma 3 0.02% 1 0.39%
John Hawkes 3 0.02% 1 0.39%
Vignesh Babu 3 0.02% 1 0.39%
Paulo Marques 3 0.02% 1 0.39%
Wang Chen 3 0.02% 1 0.39%
Tobias Klauser 2 0.01% 1 0.39%
Aruna-Hewapathirane 2 0.01% 1 0.39%
Tommi Virtanen 1 0.01% 1 0.39%
Jun Zhao 1 0.01% 1 0.39%
Kamezawa Hiroyuki 1 0.01% 1 0.39%
He Chunhui 1 0.01% 1 0.39%
Alan Cox 1 0.01% 1 0.39%
Hannes Frederic Sowa 1 0.01% 1 0.39%
Hiroaki SHIMODA 1 0.01% 1 0.39%
Linus Torvalds 1 0.01% 1 0.39%
Al Viro 1 0.01% 1 0.39%
Brian Haley 1 0.01% 1 0.39%
Pablo Neira Ayuso 1 0.01% 1 0.39%
Junwei (Martin) Zhang 1 0.01% 1 0.39%
Total 16557 100.00% 259 100.00%
Directory: net/core

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Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Linus Torvalds (pre-git)	20	80.00%	2	66.67%
David S. Miller	5	20.00%	1	33.33%
Total	25	100.00%	3	100.00%
cregit-Linux how code gets into the kernel

Release 4.11 net/core/neighbour.c

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