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ipv4: use seqlock for nh_exceptions

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Use global seqlock for the nh_exceptions. Call
fnhe_oldest with the right hash chain. Correct the diff
value for dst_set_expires.

v2: after suggestions from Eric Dumazet:
* get rid of spin lock fnhe_lock, rearrange update_or_create_fnhe
* continue daddr search in rt_bind_exception

v3:
* remove the daddr check before seqlock in rt_bind_exception
* restart lookup in rt_bind_exception on detected seqlock change,
as suggested by David Miller

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Anastasov
2012-07-18 10:15:35 +00:00
committed by David S. Miller
parent 7fed84f622
commit aee06da672
2 changed files with 68 additions and 50 deletions
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2
include/net/ip_fib.h
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@@ -51,7 +51,7 @@ struct fib_nh_exception {
struct fib_nh_exception __rcu *fnhe_next;
__be32 fnhe_daddr;
u32 fnhe_pmtu;
u32 fnhe_gw;
__be32 fnhe_gw;
unsigned long fnhe_expires;
unsigned long fnhe_stamp;
};