diff options
Diffstat (limited to 'include/net/ndisc.h')
| -rw-r--r-- | include/net/ndisc.h | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/include/net/ndisc.h b/include/net/ndisc.h index 23b3a7c5878..745bf741e02 100644 --- a/include/net/ndisc.h +++ b/include/net/ndisc.h @@ -127,13 +127,19 @@ static int ndisc_addr_option_pad(unsigned short type) } } +static inline int ndisc_opt_addr_space(struct net_device *dev) +{ + return NDISC_OPT_SPACE(dev->addr_len + + ndisc_addr_option_pad(dev->type)); +} + static inline u8 *ndisc_opt_addr_data(struct nd_opt_hdr *p, struct net_device *dev) { u8 *lladdr = (u8 *)(p + 1); int lladdrlen = p->nd_opt_len << 3; int prepad = ndisc_addr_option_pad(dev->type); - if (lladdrlen != NDISC_OPT_SPACE(dev->addr_len + prepad)) + if (lladdrlen != ndisc_opt_addr_space(dev)) return NULL; return lladdr + prepad; } @@ -148,15 +154,14 @@ static inline u32 ndisc_hashfn(const void *pkey, const struct net_device *dev, _ (p32[3] * hash_rnd[3])); } -static inline struct neighbour *__ipv6_neigh_lookup(struct neigh_table *tbl, struct net_device *dev, const void *pkey) +static inline struct neighbour *__ipv6_neigh_lookup_noref(struct net_device *dev, const void *pkey) { struct neigh_hash_table *nht; const u32 *p32 = pkey; struct neighbour *n; u32 hash_val; - rcu_read_lock_bh(); - nht = rcu_dereference_bh(tbl->nht); + nht = rcu_dereference_bh(nd_tbl.nht); hash_val = ndisc_hashfn(pkey, dev, nht->hash_rnd) >> (32 - nht->hash_shift); for (n = rcu_dereference_bh(nht->hash_buckets[hash_val]); n != NULL; @@ -164,12 +169,21 @@ static inline struct neighbour *__ipv6_neigh_lookup(struct neigh_table *tbl, str u32 *n32 = (u32 *) n->primary_key; if (n->dev == dev && ((n32[0] ^ p32[0]) | (n32[1] ^ p32[1]) | - (n32[2] ^ p32[2]) | (n32[3] ^ p32[3])) == 0) { - if (!atomic_inc_not_zero(&n->refcnt)) - n = NULL; - break; - } + (n32[2] ^ p32[2]) | (n32[3] ^ p32[3])) == 0) + return n; } + + return NULL; +} + +static inline struct neighbour *__ipv6_neigh_lookup(struct net_device *dev, const void *pkey) +{ + struct neighbour *n; + + rcu_read_lock_bh(); + n = __ipv6_neigh_lookup_noref(dev, pkey); + if (n && !atomic_inc_not_zero(&n->refcnt)) + n = NULL; rcu_read_unlock_bh(); return n; |