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ipvs: fix dst_lock locking on dest update

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Fix dst_lock usage in __ip_vs_update_dest. We need
_bh locking because destination is updated in user context.
Can cause lockups on frequent destination updates.
Problem reported by Simon Kirby. Bug was introduced
in 2.6.37 from the "ipvs: changes for local real server"
change.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Hans Schillstrom <hans@schillstrom.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Julian Anastasov 2011-02-22 10:40:25 +02:00 committed by Simon Horman
parent 0af320fb46
commit ff75f40f44
1 changed files with 2 additions and 2 deletions
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4
net/netfilter/ipvs/ip_vs_ctl.c
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@ -808,9 +808,9 @@ __ip_vs_update_dest(struct ip_vs_service *svc, struct ip_vs_dest *dest,
dest->u_threshold = udest->u_threshold;
dest->l_threshold = udest->l_threshold;
spin_lock(&dest->dst_lock);
spin_lock_bh(&dest->dst_lock);
ip_vs_dst_reset(dest);
spin_unlock(&dest->dst_lock);
spin_unlock_bh(&dest->dst_lock);
if (add)
ip_vs_new_estimator(&dest->stats);