cregit-Linux how code gets into the kernel

Release 4.14 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,
			   u32 pid);
static void neigh_update_notify(struct neighbour *neigh, u32 nlmsg_pid);
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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2080.00%266.67%
David S. Miller520.00%133.33%
Total25100.00%3100.00%


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

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf4282.35%250.00%
Ido Schimmel713.73%125.00%
Roopa Prabhu23.92%125.00%
Total51100.00%4100.00%

/* * 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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2278.57%133.33%
Hideaki Yoshifuji / 吉藤英明517.86%133.33%
Aruna-Hewapathirane13.57%133.33%
Total28100.00%3100.00%

EXPORT_SYMBOL(neigh_rand_reach_time);
static bool neigh_del(struct neighbour *n, __u8 state, struct neighbour __rcu **np, struct neigh_table *tbl) { bool retval = false; write_lock(&n->lock); if (refcount_read(&n->refcnt) == 1 && !(n->nud_state & state)) { struct neighbour *neigh; neigh = rcu_dereference_protected(n->next, lockdep_is_held(&tbl->lock)); rcu_assign_pointer(*np, neigh); n->dead = 1; retval = true; } write_unlock(&n->lock); if (retval) neigh_cleanup_and_release(n); return retval; }

Contributors

PersonTokensPropCommitsCommitProp
Sowmini Varadhan12199.18%150.00%
Elena Reshetova10.82%150.00%
Total122100.00%2100.00%


bool neigh_remove_one(struct neighbour *ndel, struct neigh_table *tbl) { struct neigh_hash_table *nht; void *pkey = ndel->primary_key; u32 hash_val; struct neighbour *n; struct neighbour __rcu **np; nht = rcu_dereference_protected(tbl->nht, lockdep_is_held(&tbl->lock)); hash_val = tbl->hash(pkey, ndel->dev, nht->hash_rnd); hash_val = hash_val >> (32 - nht->hash_shift); np = &nht->hash_buckets[hash_val]; while ((n = rcu_dereference_protected(*np, lockdep_is_held(&tbl->lock)))) { if (n == ndel) return neigh_del(n, 0, np, tbl); np = &n->next; } return false; }

Contributors

PersonTokensPropCommitsCommitProp
Sowmini Varadhan149100.00%1100.00%
Total149100.00%1100.00%


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 */ if (neigh_del(n, NUD_PERMANENT, np, tbl)) { shrunk = 1; continue; } np = &n->next; } } tbl->last_flush = jiffies; write_unlock_bh(&tbl->lock); return shrunk; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)9053.57%327.27%
Eric Dumazet4325.60%218.18%
David S. Miller3017.86%545.45%
Sowmini Varadhan52.98%19.09%
Total168100.00%11100.00%


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

PersonTokensPropCommitsCommitProp
Pavel Emelyanov49100.00%1100.00%
Total49100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3992.86%150.00%
Arnaldo Carvalho de Melo37.14%150.00%
Total42100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)43100.00%1100.00%
Total43100.00%1100.00%


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 (refcount_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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)14961.07%425.00%
Eric Dumazet6125.00%425.00%
Tommi Virtanen166.56%16.25%
David S. Miller72.87%212.50%
Joe Perches41.64%16.25%
Herbert Xu31.23%16.25%
Arnaldo Carvalho de Melo20.82%16.25%
Elena Reshetova10.41%16.25%
Thomas Graf10.41%16.25%
Total244100.00%16100.00%


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

PersonTokensPropCommitsCommitProp
Herbert Xu38100.00%1100.00%
Total38100.00%1100.00%

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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3554.69%685.71%
Herbert Xu2945.31%114.29%
Total64100.00%7100.00%

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; refcount_set(&n->refcnt, 1); n->dead = 1; out: return n; out_entries: atomic_dec(&tbl->entries); goto out; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)15056.39%526.32%
Herbert Xu3613.53%210.53%
David S. Miller2910.90%421.05%
Rick Jones186.77%15.26%
Arnaldo Carvalho de Melo103.76%15.26%
Eric Dumazet93.38%210.53%
Hideaki Yoshifuji / 吉藤英明51.88%15.26%
Andrew Morton41.50%15.26%
Pavel Emelyanov41.50%15.26%
Elena Reshetova10.38%15.26%
Total266100.00%19100.00%


static void neigh_get_hash_rnd(u32 *x) { *x = get_random_u32() | 1; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller1477.78%150.00%
Jason A. Donenfeld422.22%150.00%
Total18100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
David S. Miller8856.77%457.14%
Eric Dumazet6441.29%228.57%
Andrew Morton31.94%114.29%
Total155100.00%7100.00%


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

PersonTokensPropCommitsCommitProp
David S. Miller4552.33%250.00%
Eric Dumazet4147.67%250.00%
Total86100.00%4100.00%


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

PersonTokensPropCommitsCommitProp
David S. Miller12452.54%466.67%
Eric Dumazet11247.46%233.33%
Total236100.00%6100.00%


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 (!refcount_inc_not_zero(&n->refcnt)) n = NULL; NEIGH_CACHE_STAT_INC(tbl, hits); } rcu_read_unlock_bh(); return n; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)4251.22%440.00%
Eric Dumazet1923.17%220.00%
David S. Miller1417.07%110.00%
Pavel Emelyanov33.66%110.00%
Eric W. Biedermann33.66%110.00%
Elena Reshetova11.22%110.00%
Total82100.00%10100.00%

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 (!refcount_inc_not_zero(&n->refcnt)) n = NULL; NEIGH_CACHE_STAT_INC(tbl, hits); break; } } rcu_read_unlock_bh(); return n; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller10159.41%330.00%
Eric Dumazet4224.71%220.00%
Eric W. Biedermann95.29%110.00%
Pavel Emelyanov95.29%110.00%
Hideaki Yoshifuji / 吉藤英明84.71%220.00%
Elena Reshetova10.59%110.00%
Total170100.00%10100.00%

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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)20039.22%627.27%
David S. Miller10821.18%731.82%
Eric Dumazet8717.06%29.09%
Herbert Xu5510.78%313.64%
Arnaldo Carvalho de Melo499.61%14.55%
Jiri Pirko71.37%29.09%
Joe Perches40.78%14.55%
Total510100.00%22100.00%

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

PersonTokensPropCommitsCommitProp
Pavel Emelyanov4985.96%150.00%
Hideaki Yoshifuji / 吉藤英明814.04%150.00%
Total57100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明4754.65%133.33%
Pavel Emelyanov3641.86%133.33%
David S. Miller33.49%133.33%
Total86100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明6298.41%150.00%
Pavel Emelyanov11.59%150.00%
Total63100.00%2100.00%

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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)17272.57%436.36%
Hideaki Yoshifuji / 吉藤英明2912.24%327.27%
Arnaldo Carvalho de Melo187.59%19.09%
Eric W. Biedermann114.64%19.09%
Eric Dumazet41.69%19.09%
Pavel Emelyanov31.27%19.09%
Total237100.00%11100.00%

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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)13071.43%436.36%
Hideaki Yoshifuji / 吉藤英明2413.19%436.36%
David S. Miller168.79%19.09%
Eric W. Biedermann84.40%19.09%
Arnaldo Carvalho de Melo42.20%19.09%
Total182100.00%11100.00%


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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)11387.60%360.00%
Hideaki Yoshifuji / 吉藤英明1310.08%120.00%
Arnaldo Carvalho de Melo32.33%120.00%
Total129100.00%5100.00%

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

Contributors

PersonTokensPropCommitsCommitProp
Denis V. Lunev2696.30%150.00%
Elena Reshetova13.70%150.00%
Total27100.00%2100.00%

/* * 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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)6141.50%213.33%
David S. Miller4329.25%640.00%
Eric Dumazet2315.65%213.33%
Herbert Xu117.48%213.33%
Joe Perches74.76%213.33%
Jiri Pirko21.36%16.67%
Total147100.00%15100.00%

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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2686.67%150.00%
Joe Perches413.33%150.00%
Total30100.00%2100.00%

/* 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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2686.67%150.00%
Joe Perches413.33%150.00%
Total30100.00%2100.00%


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 (refcount_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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)21651.67%522.73%
Eric Dumazet9121.77%313.64%
David S. Miller266.22%313.64%
Michel Machado174.07%14.55%
Jiri Pirko174.07%14.55%
Duan Jiong174.07%14.55%
Hideaki Yoshifuji / 吉藤英明143.35%29.09%
Nicolas Dichtel81.91%14.55%
Arjan van de Ven61.44%14.55%
Viresh Kumar30.72%14.55%
Thomas Graf10.24%14.55%
Alan Cox10.24%14.55%
Elena Reshetova10.24%14.55%
Total418100.00%22100.00%


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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2644.83%125.00%
Jiri Pirko1525.86%125.00%
Hideaki Yoshifuji/吉藤英明1118.97%125.00%
Timo Teräs610.34%125.00%
Total58100.00%4100.00%


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

PersonTokensPropCommitsCommitProp
Timo Teräs9580.51%120.00%
Eric Dumazet1916.10%360.00%
Joe Perches43.39%120.00%
Total118100.00%5100.00%


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

PersonTokensPropCommitsCommitProp
Eric Dumazet8297.62%250.00%
Hannes Frederic Sowa11.19%125.00%
Junwei (Martin) Zhang11.19%125.00%
Total84100.00%4100.00%

/* 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, 0); neigh_release(neigh); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明23947.70%315.00%
Linus Torvalds (pre-git)17134.13%315.00%
Jiri Pirko254.99%15.00%
Joe Perches203.99%15.00%
Herbert Xu122.40%15.00%
Tom Tucker122.40%15.00%
David S. Miller71.40%210.00%
Erik Kline40.80%15.00%
Duan Jiong30.60%15.00%
Eric Dumazet20.40%210.00%
Roopa Prabhu20.40%15.00%
Greg Banks20.40%15.00%
Timo Teräs10.20%15.00%
Thomas Graf10.20%15.00%
Total501100.00%20100.00%


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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)17342.30%318.75%
Eric Dumazet8119.80%318.75%
Hideaki Yoshifuji / 吉藤英明5012.22%212.50%
Julian Anastasov389.29%16.25%
Jiri Pirko307.33%16.25%
Arnaldo Carvalho de Melo163.91%16.25%
Neil Horman92.20%16.25%
David S. Miller71.71%212.50%
Joe Perches40.98%16.25%
Linus Torvalds10.24%16.25%
Total409100.00%16100.00%

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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)8074.77%337.50%
Doug Kehn1312.15%112.50%
David S. Miller76.54%225.00%
Stephen Hemminger76.54%225.00%
Total107100.00%8100.00%

/* 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, u32 nlmsg_pid) { 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 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; } } /* Update timestamps only once we know we will make a change to the * neighbour entry. Otherwise we risk to move the locktime window with * noop updates and ignore relevant ARP updates. */ if (new != old || lladdr != neigh->ha) { if (new & NUD_CONNECTED) neigh->confirmed = jiffies; neigh->updated = jiffies; } 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, nlmsg_pid); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)40052.77%721.88%
Hideaki Yoshifuji / 吉藤英明15019.79%515.62%
David S. Miller496.46%412.50%
Ihar Hrachyshka334.35%13.12%
Timo Teräs293.83%13.12%
Eric Dumazet253.30%412.50%
Erik Kline162.11%13.12%
Julian Anastasov162.11%26.25%
Arnaldo Carvalho de Melo111.45%13.12%
Tom Tucker81.06%13.12%
Li RongQing60.79%13.12%
Jiri Pirko50.66%13.12%
Roopa Prabhu50.66%13.12%
Bob Gilligan40.53%13.12%
Thomas Graf10.13%13.12%
Total758100.00%32100.00%

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

PersonTokensPropCommitsCommitProp
Jiri Benc6187.14%133.33%
Julian Anastasov710.00%133.33%
Duan Jiong22.86%133.33%
Total70100.00%3100.00%

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, 0); return neigh; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)6192.42%240.00%
Arnaldo Carvalho de Melo23.03%120.00%
Roopa Prabhu23.03%120.00%
Hideaki Yoshifuji / 吉藤英明11.52%120.00%
Total66100.00%5100.00%

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

PersonTokensPropCommitsCommitProp
David S. Miller2634.21%330.00%
Eric Dumazet2532.89%220.00%
Linus Torvalds (pre-git)1621.05%220.00%
Andrew Morton33.95%110.00%
Stephen Hemminger33.95%110.00%
Eric W. Biedermann33.95%110.00%
Total76100.00%10100.00%

/* 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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)9456.29%433.33%
Eric Dumazet2514.97%18.33%
Arnaldo Carvalho de Melo2514.97%18.33%
ramesh.nagappa@gmail.com105.99%18.33%
David S. Miller95.39%325.00%
Stephen Hemminger42.40%216.67%
Total167100.00%12100.00%

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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)7863.93%436.36%
Eric Dumazet1713.93%19.09%
Arnaldo Carvalho de Melo1512.30%218.18%
David S. Miller97.38%218.18%
ramesh.nagappa@gmail.com21.64%19.09%
Stephen Hemminger10.82%19.09%
Total122100.00%11100.00%

EXPORT_SYMBOL(neigh_connected_output);
int neigh_direct_output(struct neighbour *neigh, struct sk_buff *skb) { return dev_queue_xmit(skb); }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller21100.00%1100.00%
Total21100.00%1100.00%

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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)15783.96%350.00%
David S. Miller168.56%116.67%
Eric Dumazet105.35%116.67%
Patrick McHardy42.14%116.67%
Total187100.00%6100.00%


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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)13177.06%228.57%
Hideaki Yoshifuji / 吉藤英明169.41%114.29%
Patrick McHardy116.47%114.29%
Jiri Pirko105.88%114.29%
Aruna-Hewapathirane10.59%114.29%
Eric Dumazet10.59%114.29%
Total170100.00%7100.00%

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

PersonTokensPropCommitsCommitProp
Eric W. Biedermann6068.97%114.29%
Nicolas Dichtel89.20%114.29%
Gao Feng89.20%114.29%
Hideaki Yoshifuji / 吉藤英明78.05%228.57%
Denis V. Lunev33.45%114.29%
Tobias Klauser11.15%114.29%
Total87100.00%7100.00%


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; refcount_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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)7639.58%422.22%
Veaceslav Falico3015.62%15.56%
Eric W. Biedermann178.85%15.56%
Stephen Hemminger126.25%15.56%
Thomas Graf115.73%15.56%
Jiri Pirko105.21%211.11%
Herbert Xu94.69%15.56%
Nicolas Dichtel84.17%15.56%
Krishna Kumar63.12%15.56%
Gao Feng42.08%15.56%
Eric Dumazet42.08%15.56%
Hideaki Yoshifuji / 吉藤英明31.56%15.56%
Arnaldo Carvalho de Melo10.52%15.56%
Elena Reshetova10.52%15.56%
Total192100.00%18100.00%

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

PersonTokensPropCommitsCommitProp
David S. Miller3096.77%150.00%
Herbert Xu13.23%150.00%
Total31100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)5162.96%337.50%
David S. Miller1923.46%225.00%
Herbert Xu67.41%112.50%
Nicolas Dichtel44.94%112.50%
Arnaldo Carvalho de Melo11.23%112.50%
Total81100.00%8100.00%

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

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu1593.75%150.00%
Denis V. Lunev16.25%150.00%
Total16100.00%2100.00%

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); refcount_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

PersonTokensPropCommitsCommitProp
David S. Miller9027.78%414.29%
Linus Torvalds (pre-git)8125.00%13.57%
Hideaki Yoshifuji / 吉藤英明3811.73%13.57%
Nicolas Dichtel237.10%13.57%
Eric Dumazet206.17%414.29%
Pavel Emelyanov113.40%27.14%
Herbert Xu113.40%13.57%
Eric W. Biedermann103.09%27.14%
Andrew Morton92.78%310.71%
Américo Wang72.16%13.57%
Jiri Pirko61.85%13.57%
Harald Welte41.23%13.57%
Wang Chen30.93%13.57%
Alexey Dobriyan30.93%13.57%
Denis V. Lunev30.93%13.57%
Viresh Kumar30.93%13.57%
Elena Reshetova10.31%13.57%
Tejun Heo10.31%13.57%
Total324100.00%28100.00%

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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)5340.77%321.43%
David S. Miller2418.46%214.29%
Eric Dumazet1310.00%321.43%
Kirill Korotaev1310.00%17.14%
Alexey Dobriyan118.46%17.14%
Américo Wang107.69%17.14%
Herbert Xu43.08%17.14%
Joe Perches10.77%17.14%
Tejun Heo10.77%17.14%
Total130100.00%14100.00%

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

PersonTokensPropCommitsCommitProp
Américo Wang60100.00%1100.00%
Total60100.00%1100.00%


static int neigh_delete(struct sk_buff *skb, struct nlmsghdr *nlh, struct netlink_ext_ack *extack) { 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, NETLINK_CB(skb).portid); write_lock_bh(&tbl->lock); neigh_release(neigh); neigh_remove_one(neigh, tbl); write_unlock_bh(&tbl->lock); out: return err; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)13042.35%423.53%
Thomas Graf8928.99%317.65%
Sowmini Varadhan237.49%15.88%
Américo Wang175.54%15.88%
Eric W. Biedermann134.23%211.76%
Arnaldo Carvalho de Melo92.93%15.88%
Eric Dumazet82.61%15.88%
Roopa Prabhu72.28%15.88%
Hideaki Yoshifuji / 吉藤英明61.95%211.76%
David Ahern51.63%15.88%
Total307100.00%17100.00%


static int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, struct netlink_ext_ack *extack) { 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, extack); 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, NETLINK_CB(skb).portid); neigh_release(neigh); out: return err; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf26353.67%421.05%
Linus Torvalds (pre-git)10120.61%421.05%
Eric W. Biedermann357.14%315.79%
Américo Wang316.33%15.26%
Ville Nuorvala244.90%15.26%
Eric Dumazet112.24%15.26%
Arnaldo Carvalho de Melo81.63%15.26%
Roopa Prabhu71.43%15.26%
David Ahern61.22%15.26%
Hideaki Yoshifuji / 吉藤英明30.61%15.26%
Johannes Berg10.20%15.26%
Total490100.00%19100.00%


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, refcount_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

PersonTokensPropCommitsCommitProp
Thomas Graf18155.02%436.36%
Jiri Pirko6519.76%19.09%
David S. Miller3811.55%19.09%
Nicolas Dichtel164.86%19.09%
Hideaki Yoshifuji/吉藤英明144.26%19.09%
Eric Dumazet133.95%19.09%
Elena Reshetova10.30%19.09%
Shan Wei10.30%19.09%
Total329100.00%11100.00%


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

PersonTokensPropCommitsCommitProp
Thomas Graf42679.48%425.00%
David S. Miller407.46%318.75%
Eric Dumazet336.16%16.25%
Patrick McHardy173.17%212.50%
Rick Jones81.49%16.25%
Nicolas Dichtel50.93%212.50%
Johannes Berg30.56%16.25%
John Hawkes30.56%16.25%
Kamezawa Hiroyuki10.19%16.25%
Total536100.00%16100.00%


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

PersonTokensPropCommitsCommitProp
Thomas Graf15688.64%457.14%
Patrick McHardy179.66%228.57%
Johannes Berg31.70%114.29%
Total176100.00%7100.00%

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 netlink_ext_ack *extack) { 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, extack); 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, extack); 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

PersonTokensPropCommitsCommitProp
Thomas Graf52668.76%317.65%
Jiri Pirko7810.20%15.88%
Gao Feng415.36%15.88%
Américo Wang364.71%15.88%
Hideaki Yoshifuji/吉藤英明192.48%15.88%
Eric Dumazet182.35%15.88%
Jean-Francois Remy151.96%15.88%
Denis V. Lunev91.18%15.88%
Ido Schimmel70.92%15.88%
David Ahern70.92%15.88%
Hideaki Yoshifuji / 吉藤英明40.52%211.76%
Johannes Berg20.26%15.88%
Eric W. Biedermann20.26%15.88%
Tobias Klauser10.13%15.88%
Total765100.00%17100.00%


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

PersonTokensPropCommitsCommitProp
Thomas Graf17964.16%317.65%
Linus Torvalds (pre-git)279.68%317.65%
Américo Wang165.73%15.88%
Nicolas Dichtel165.73%15.88%
Hideaki Yoshifuji / 吉藤英明124.30%317.65%
Denis V. Lunev93.23%15.88%
Gautam Kachroo82.87%15.88%
Eric W. Biedermann72.51%211.76%
Arnaldo Carvalho de Melo31.08%15.88%
David S. Miller20.72%15.88%
Total279100.00%17100.00%


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 = refcount_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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)18853.56%426.67%
Thomas Graf8524.22%213.33%
Eric Dumazet236.55%16.67%
Patrick McHardy174.84%213.33%
David S. Miller164.56%16.67%
Stephen Hemminger92.56%16.67%
Jamal Hadi Salim61.71%16.67%
Johannes Berg30.85%16.67%
Arnaldo Carvalho de Melo30.85%16.67%
Elena Reshetova10.28%16.67%
Total351100.00%15100.00%


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

PersonTokensPropCommitsCommitProp
Tony Zelenoff16690.71%120.00%
David S. Miller73.83%120.00%
Konstantin Khlebnikov63.28%120.00%
Johannes Berg31.64%120.00%
Jun Zhao10.55%120.00%
Total183100.00%5100.00%


static void neigh_update_notify(struct neighbour *neigh, u32 nlmsg_pid) { call_netevent_notifiers(NETEVENT_NEIGH_UPDATE, neigh); __neigh_notify(neigh, RTM_NEWNEIGH, 0, nlmsg_pid); }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf2784.38%150.00%
Roopa Prabhu515.62%150.00%
Total32100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
David Ahern51100.00%1100.00%
Total51100.00%1100.00%


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

Contributors

PersonTokensPropCommitsCommitProp
David Ahern30100.00%1100.00%
Total30100.00%1100.00%


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, 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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)14337.73%313.64%
David Ahern12633.25%29.09%
Eric Dumazet318.18%313.64%
Arnaldo Carvalho de Melo236.07%14.55%
Eric W. Biedermann174.49%29.09%
Zhang Shengju82.11%14.55%
David S. Miller82.11%313.64%
Gautam Kachroo82.11%14.55%
Hideaki Yoshifuji / 吉藤英明61.58%29.09%
Octavian Purdila51.32%14.55%
Johannes Berg20.53%14.55%
Julian Anastasov10.26%14.55%
Jamal Hadi Salim10.26%14.55%
Total379100.00%22100.00%


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

PersonTokensPropCommitsCommitProp
Tony Zelenoff22496.55%116.67%
Zhang Shengju41.72%116.67%
Konstantin Khlebnikov10.43%116.67%
Eric Dumazet10.43%116.67%
David S. Miller10.43%116.67%
Eric W. Biedermann10.43%116.67%
Total232100.00%6100.00%


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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)13156.96%225.00%
Tony Zelenoff6327.39%112.50%
Américo Wang166.96%112.50%
Arnaldo Carvalho de Melo114.78%112.50%
Eric Dumazet73.04%112.50%
Thomas Graf20.87%225.00%
Total230100.00%8100.00%


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

PersonTokensPropCommitsCommitProp
David S. Miller9574.22%360.00%
Eric Dumazet3325.78%240.00%
Total128100.00%5100.00%

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

PersonTokensPropCommitsCommitProp
David S. Miller12968.25%342.86%
Eric Dumazet5428.57%228.57%
Alexey Kuznetsov52.65%114.29%
Thomas Graf10.53%114.29%
Total189100.00%7100.00%

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

PersonTokensPropCommitsCommitProp
Eric W. Biedermann18694.42%266.67%
David Barroso115.58%133.33%
Total197100.00%3100.00%

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

PersonTokensPropCommitsCommitProp
David S. Miller16680.98%333.33%
Eric W. Biedermann167.80%111.11%
Hideaki Yoshifuji / 吉藤英明125.85%333.33%
Eric Dumazet115.37%222.22%
Total205100.00%9100.00%


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

PersonTokensPropCommitsCommitProp
David S. Miller19382.13%333.33%
Eric W. Biedermann166.81%111.11%
Eric Dumazet145.96%222.22%
Hideaki Yoshifuji / 吉藤英明125.11%333.33%
Total235100.00%9100.00%


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

PersonTokensPropCommitsCommitProp
David S. Miller6591.55%150.00%
Chris Larson68.45%150.00%
Total71100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
David S. Miller8974.17%120.00%
Eric W. Biedermann1915.83%120.00%
Hideaki Yoshifuji / 吉藤英明1210.00%360.00%
Total120100.00%5100.00%


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

PersonTokensPropCommitsCommitProp
David S. Miller9465.28%116.67%
Eric W. Biedermann1913.19%116.67%
Jorge Boncompte1913.19%116.67%
Hideaki Yoshifuji / 吉藤英明128.33%350.00%
Total144100.00%6100.00%


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

PersonTokensPropCommitsCommitProp
David S. Miller6591.55%150.00%
Chris Larson68.45%150.00%
Total71100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
David S. Miller6286.11%150.00%
Chris Larson1013.89%150.00%
Total72100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
David S. Miller6878.16%133.33%
Eric Dumazet1820.69%133.33%
Chris Larson11.15%133.33%
Total87100.00%3100.00%

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

PersonTokensPropCommitsCommitProp
David S. Miller13499.26%150.00%
Chris Larson10.74%150.00%
Total135100.00%2100.00%

EXPORT_SYMBOL(neigh_seq_next);
void neigh_seq_stop(struct seq_file *seq, void *v) __releases(rcu_bh) { rcu_read_unlock_bh(); }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller1466.67%150.00%
Eric Dumazet733.33%150.00%
Total21100.00%2100.00%

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

PersonTokensPropCommitsCommitProp
David S. Miller8296.47%133.33%
Alexey Dobriyan22.35%133.33%
Rusty Russell11.18%133.33%
Total85100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
David S. Miller7496.10%133.33%
Alexey Dobriyan22.60%133.33%
Rusty Russell11.30%133.33%
Total77100.00%3100.00%


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

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller14100.00%1100.00%
Total14100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
David S. Miller10086.21%120.00%
Rick Jones65.17%120.00%
Herbert Xu43.45%120.00%
Neil Horman43.45%120.00%
Alexey Dobriyan21.72%120.00%
Total116100.00%5100.00%

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

PersonTokensPropCommitsCommitProp
David S. Miller5498.18%150.00%
Al Viro11.82%150.00%
Total55100.00%2100.00%

; 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

PersonTokensPropCommitsCommitProp
Thomas Graf46100.00%1100.00%
Total46100.00%1100.00%


static void __neigh_notify(struct neighbour *n, int type, int flags, u32 pid) { 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, pid, 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

PersonTokensPropCommitsCommitProp
Thomas Graf5237.96%323.08%
Linus Torvalds (pre-git)4029.20%17.69%
Patrick McHardy2115.33%215.38%
Eric W. Biedermann118.03%17.69%
Roopa Prabhu42.92%17.69%
Hideaki Yoshifuji / 吉藤英明32.19%17.69%
Arnaldo Carvalho de Melo21.46%17.69%
Denis V. Lunev21.46%17.69%
Jamal Hadi Salim10.73%17.69%
Pablo Neira Ayuso10.73%17.69%
Total137100.00%13100.00%


void neigh_app_ns(struct neighbour *n) { __neigh_notify(n, RTM_GETNEIGH, NLM_F_REQUEST, 0); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)1361.90%125.00%
Thomas Graf523.81%125.00%
Roopa Prabhu29.52%125.00%
Jamal Hadi Salim14.76%125.00%
Total21100.00%4100.00%

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

PersonTokensPropCommitsCommitProp
Eric Dumazet10084.75%133.33%
Shan Wei1613.56%133.33%
Joe Perches21.69%133.33%
Total118100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
Jiri Pirko43100.00%2100.00%
Total43100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
Jiri Pirko86100.00%1100.00%
Total86100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
Jiri Pirko8787.00%250.00%
Ido Schimmel77.00%125.00%
Marcus Huewe66.00%125.00%
Total100100.00%4100.00%


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

PersonTokensPropCommitsCommitProp
Jiri Pirko7597.40%266.67%
Eric Dumazet22.60%133.33%
Total77100.00%3100.00%


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

PersonTokensPropCommitsCommitProp
Jiri Pirko52100.00%2100.00%
Total52100.00%2100.00%

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

PersonTokensPropCommitsCommitProp
Jiri Pirko52100.00%2100.00%
Total52100.00%2100.00%

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

PersonTokensPropCommitsCommitProp
Jiri Pirko53100.00%2100.00%
Total53100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
Jiri Pirko52100.00%2100.00%
Total52100.00%2100.00%

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

PersonTokensPropCommitsCommitProp
Jiri Pirko53100.00%2100.00%
Total53100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
Jean-Francois Remy130100.00%1100.00%
Total130100.00%1100.00%

#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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)9722.40%417.39%
Jiri Pirko7717.78%521.74%
Eric W. Biedermann6915.94%313.04%
Hideaki Yoshifuji / 吉藤英明6615.24%28.70%
Pavel Emelyanov296.70%28.70%
Jean-Francois Remy286.47%14.35%
Mathias Krause255.77%14.35%
Dan Aloni245.54%14.35%
Eric Dumazet102.31%14.35%
Shirley Ma30.69%14.35%
Arnaldo Carvalho de Melo30.69%14.35%
Denis V. Lunev20.46%14.35%
Total433100.00%23100.00%

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

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)4191.11%250.00%
Dan Aloni36.67%125.00%
Eric W. Biedermann12.22%125.00%
Total45100.00%4100.00%

EXPORT_SYMBOL(neigh_sysctl_unregister); #endif /* CONFIG_SYSCTL */
static int __init neigh_init(void) { rtnl_register(PF_UNSPEC, RTM_NEWNEIGH, neigh_add, NULL, 0); rtnl_register(PF_UNSPEC, RTM_DELNEIGH, neigh_delete, NULL, 0); rtnl_register(PF_UNSPEC, RTM_GETNEIGH, NULL, neigh_dump_info, 0); rtnl_register(PF_UNSPEC, RTM_GETNEIGHTBL, NULL, neightbl_dump_info, 0); rtnl_register(PF_UNSPEC, RTM_SETNEIGHTBL, neightbl_set, NULL, 0); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf6787.01%133.33%
Florian Westphal56.49%133.33%
Greg Rose56.49%133.33%
Total77100.00%3100.00%

subsys_initcall(neigh_init);

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)424125.16%186.72%
David S. Miller269215.97%3513.06%
Thomas Graf242014.36%176.34%
Eric Dumazet13347.91%186.72%
Jiri Pirko10926.48%82.99%
Hideaki Yoshifuji / 吉藤英明10266.09%228.21%
Eric W. Biedermann5493.26%134.85%
Tony Zelenoff4532.69%10.37%
Sowmini Varadhan2981.77%10.37%
Arnaldo Carvalho de Melo2381.41%41.49%
Herbert Xu2341.39%51.87%
David Ahern2251.33%31.12%
Américo Wang2181.29%20.75%
Pavel Emelyanov2001.19%82.99%
Jean-Francois Remy1731.03%10.37%
Timo Teräs1310.78%20.75%
Patrick McHardy880.52%51.87%
Nicolas Dichtel880.52%31.12%
Joe Perches710.42%31.12%
Jiri Benc670.40%10.37%
Denis V. Lunev650.39%62.24%
Julian Anastasov620.37%31.12%
Hideaki Yoshifuji/吉藤英明620.37%10.37%
Gao Feng530.31%31.12%
Francesco Fusco460.27%10.37%
Roopa Prabhu420.25%10.37%
Stephen Hemminger380.23%72.61%
Ihar Hrachyshka330.20%10.37%
Rick Jones320.19%10.37%
Veaceslav Falico300.18%10.37%
Dan Aloni270.16%10.37%
Mathias Krause250.15%10.37%
Ville Nuorvala240.14%10.37%
Chris Larson240.14%20.75%
Tom Tucker230.14%10.37%
Duan Jiong220.13%31.12%
Ido Schimmel210.12%20.75%
Rusty Russell200.12%20.75%
Erik Kline200.12%10.37%
Alexey Dobriyan200.12%31.12%
Tommi Virtanen190.11%10.37%
Andrew Morton190.11%31.12%
Jorge Boncompte190.11%10.37%
Shan Wei170.10%10.37%
Michel Machado170.10%10.37%
Johannes Berg170.10%20.75%
Gautam Kachroo160.09%10.37%
Kirill Korotaev130.08%10.37%
Neil Horman130.08%10.37%
Doug Kehn130.08%10.37%
Zhang Shengju120.07%10.37%
ramesh.nagappa@gmail.com120.07%10.37%
David Barroso110.07%10.37%
Elena Reshetova110.07%20.75%
Jamal Hadi Salim90.05%10.37%
Arjan van de Ven80.05%20.75%
Konstantin Khlebnikov70.04%10.37%
Viresh Kumar60.04%10.37%
Marcus Huewe60.04%10.37%
Krishna Kumar60.04%10.37%
Li RongQing60.04%10.37%
Octavian Purdila50.03%10.37%
Amos Waterland50.03%10.37%
Tejun Heo50.03%31.12%
Alexey Kuznetsov50.03%10.37%
Florian Westphal50.03%10.37%
Greg Rose50.03%10.37%
Bob Gilligan40.02%10.37%
Jason A. Donenfeld40.02%10.37%
Harald Welte40.02%10.37%
Wang Chen30.02%10.37%
Vignesh Babu30.02%10.37%
Shirley Ma30.02%10.37%
John Hawkes30.02%10.37%
Paulo Marques30.02%10.37%
Tobias Klauser20.01%10.37%
Aruna-Hewapathirane20.01%10.37%
Greg Banks20.01%10.37%
Hannes Frederic Sowa10.01%10.37%
Junwei (Martin) Zhang10.01%10.37%
Brian Haley10.01%10.37%
Al Viro10.01%10.37%
Pablo Neira Ayuso10.01%10.37%
Kamezawa Hiroyuki10.01%10.37%
Linus Torvalds10.01%10.37%
Jun Zhao10.01%10.37%
Alan Cox10.01%10.37%
Hiroaki SHIMODA10.01%10.37%
He Chunhui10.01%10.37%
Total16858100.00%268100.00%
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