From 217fc833225f3a2ba55eabd3916bfbef38185cd1 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 7 Jun 2012 04:58:35 +0000 Subject: [PATCH] net: neighbour: fix neigh_dump_info() [ Upstream commit 4bd6683bd400c8b1d2ad544bb155d86a5d10f91c ] Denys found out "ip neigh" output was truncated to about 54 neighbours. Signed-off-by: Eric Dumazet Reported-by: Denys Fedoryshchenko Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/core/neighbour.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/net/core/neighbour.c b/net/core/neighbour.c index 0a68045782d1..73b90351df5c 100644 --- a/net/core/neighbour.c +++ b/net/core/neighbour.c @@ -2214,9 +2214,7 @@ static int neigh_dump_table(struct neigh_table *tbl, struct sk_buff *skb, rcu_read_lock_bh(); nht = rcu_dereference_bh(tbl->nht); - for (h = 0; h < (1 << nht->hash_shift); h++) { - if (h < s_h) - continue; + 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; @@ -2255,9 +2253,7 @@ static int pneigh_dump_table(struct neigh_table *tbl, struct sk_buff *skb, read_lock_bh(&tbl->lock); - for (h = 0; h <= PNEIGH_HASHMASK; h++) { - if (h < s_h) - continue; + 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) { @@ -2292,7 +2288,7 @@ 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 = 0; + int err; read_lock(&neigh_tbl_lock); family = ((struct rtgenmsg *) nlmsg_data(cb->nlh))->rtgen_family; @@ -2306,7 +2302,7 @@ static int neigh_dump_info(struct sk_buff *skb, struct netlink_callback *cb) s_t = cb->args[0]; - for (tbl = neigh_tables, t = 0; tbl && (err >= 0); + for (tbl = neigh_tables, t = 0; tbl; tbl = tbl->next, t++) { if (t < s_t || (family && tbl->family != family)) continue; @@ -2317,6 +2313,8 @@ static int neigh_dump_info(struct sk_buff *skb, struct netlink_callback *cb) err = pneigh_dump_table(tbl, skb, cb); else err = neigh_dump_table(tbl, skb, cb); + if (err < 0) + break; } read_unlock(&neigh_tbl_lock); -- 2.39.5