diff options
| author | YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org> | 2013-01-17 12:53:02 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-01-17 18:38:18 -0500 |
| commit | 7ff74a596b6aa47ccc71f6b9a26006af69d0e33f (patch) | |
| tree | 7b6ff3fd661d413d185ed05d0443a69c8ee838c3 | |
| parent | cbf1de72324a8105ddcc3d9ce9acbc613faea17e (diff) | |
ndisc: Update neigh->updated with write lock.
neigh->nud_state and neigh->updated are under protection of
neigh->lock.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv6/route.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 7c34c01b515..1341f68e800 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -499,22 +499,26 @@ static void rt6_probe(struct rt6_info *rt) * to no more than one per minute. */ neigh = rt ? rt->n : NULL; - if (!neigh || (neigh->nud_state & NUD_VALID)) + if (!neigh) + return; + write_lock_bh(&neigh->lock); + if (neigh->nud_state & NUD_VALID) { + write_unlock_bh(&neigh->lock); return; - read_lock_bh(&neigh->lock); + } if (!(neigh->nud_state & NUD_VALID) && time_after(jiffies, neigh->updated + rt->rt6i_idev->cnf.rtr_probe_interval)) { struct in6_addr mcaddr; struct in6_addr *target; neigh->updated = jiffies; - read_unlock_bh(&neigh->lock); + write_unlock_bh(&neigh->lock); target = (struct in6_addr *)&neigh->primary_key; addrconf_addr_solict_mult(target, &mcaddr); ndisc_send_ns(rt->dst.dev, NULL, target, &mcaddr, NULL); } else { - read_unlock_bh(&neigh->lock); + write_unlock_bh(&neigh->lock); } } #else |