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[NEIGH]: always use hash_mask under tbl lock 

Make sure hash_mask is protected with tbl->lock in all cases just like
the hash_buckets.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Anastasov 2006-10-03 15:49:46 -07:00 committed by David S. Miller
parent 1e0c14f49d
commit c5e29460f5
1 changed files with 6 additions and 6 deletions
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12
net/core/neighbour.c
View File

@ -344,12 +344,12 @@ struct neighbour *neigh_lookup(struct neigh_table *tbl, const void *pkey,
{
struct neighbour *n;
int key_len = tbl->key_len;
u32 hash_val = tbl->hash(pkey, dev) & tbl->hash_mask;
u32 hash_val = tbl->hash(pkey, dev);
NEIGH_CACHE_STAT_INC(tbl, lookups);
read_lock_bh(&tbl->lock);
for (n = tbl->hash_buckets[hash_val]; n; n = n->next) {
for (n = tbl->hash_buckets[hash_val & tbl->hash_mask]; n; n = n->next) {
if (dev == n->dev && !memcmp(n->primary_key, pkey, key_len)) {
neigh_hold(n);
NEIGH_CACHE_STAT_INC(tbl, hits);
@ -364,12 +364,12 @@ struct neighbour *neigh_lookup_nodev(struct neigh_table *tbl, const void *pkey)
{
struct neighbour *n;
int key_len = tbl->key_len;
u32 hash_val = tbl->hash(pkey, NULL) & tbl->hash_mask;
u32 hash_val = tbl->hash(pkey, NULL);
NEIGH_CACHE_STAT_INC(tbl, lookups);
read_lock_bh(&tbl->lock);
for (n = tbl->hash_buckets[hash_val]; n; n = n->next) {
for (n = tbl->hash_buckets[hash_val & tbl->hash_mask]; n; n = n->next) {
if (!memcmp(n->primary_key, pkey, key_len)) {
neigh_hold(n);
NEIGH_CACHE_STAT_INC(tbl, hits);
@ -1998,12 +1998,12 @@ static int neigh_dump_table(struct neigh_table *tbl, struct sk_buff *skb,
int rc, h, s_h = cb->args[1];
int idx, s_idx = idx = cb->args[2];
read_lock_bh(&tbl->lock);
for (h = 0; h <= tbl->hash_mask; h++) {
if (h < s_h)
continue;
if (h > s_h)
s_idx = 0;
read_lock_bh(&tbl->lock);
for (n = tbl->hash_buckets[h], idx = 0; n; n = n->next, idx++) {
if (idx < s_idx)
continue;
@ -2016,8 +2016,8 @@ static int neigh_dump_table(struct neigh_table *tbl, struct sk_buff *skb,
goto out;
}
}
read_unlock_bh(&tbl->lock);
}
read_unlock_bh(&tbl->lock);
rc = skb->len;
out:
cb->args[1] = h;