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ipvs: add ip_vs_dest_hold and ip_vs_dest_put

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ip_vs_dest_hold will be used under RCU lock
while ip_vs_dest_put can be called even after dest
is removed from service, as it happens for conns and
some schedulers.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Julian Anastasov
2013-03-22 11:46:38 +02:00
committed by Pablo Neira Ayuso
parent 6b6df46663
commit fca9c20ae1
4 changed files with 16 additions and 11 deletions
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10
include/net/ip_vs.h
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@@ -1427,6 +1427,16 @@ ip_vs_find_dest(struct net *net, int af, const union nf_inet_addr *daddr,
__u16 protocol, __u32 fwmark, __u32 flags);
extern struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp);
static inline void ip_vs_dest_hold(struct ip_vs_dest *dest)
{
atomic_inc(&dest->refcnt);
}
static inline void ip_vs_dest_put(struct ip_vs_dest *dest)
{
smp_mb__before_atomic_dec();
atomic_dec(&dest->refcnt);
}
/*
* IPVS sync daemon data and function prototypes