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xfrm: Simplify SA looking up when using wildcard source

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__xfrm4/6_state_addr_check is a four steps check, all we need to do
is checking whether the destination address match when looking SA
using wildcard source address. Passing saddr from flow is worst option,
as the checking needs to reach the fourth step while actually only
one time checking will do the work.

So, simplify this process by only checking destination address when
using wildcard source address for looking up SAs.

Signed-off-by: Fan Du <fan.du@windriver.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Fan Du 2013-09-27 16:32:50 +08:00 committed by Steffen Klassert
parent 6f1156383a
commit f59bbdfa5c
1 changed files with 1 additions and 1 deletions
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2
net/xfrm/xfrm_state.c
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@ -824,7 +824,7 @@ xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
x->props.reqid == tmpl->reqid &&
(mark & x->mark.m) == x->mark.v &&
!(x->props.flags & XFRM_STATE_WILDRECV) &&
xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
xfrm_addr_equal(&x->id.daddr, daddr, encap_family) &&
tmpl->mode == x->props.mode &&
tmpl->id.proto == x->id.proto &&
(tmpl->id.spi == x->id.spi || !tmpl->id.spi))