xfrm: policy: add sequence count to sync with hash resize

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Once xfrm_policy_lookup_bytype doesn't grab xfrm_policy_lock anymore its
possible for a hash resize to occur in parallel.

Use sequence counter to block lookup in case a resize is in
progress and to also re-lookup in case hash table was altered
in the mean time (might cause use to not find the best-match).

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

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Florian Westphal 2016-08-11 15:17:54 +02:00 • committed by Steffen Klassert

parent e1e551bc56

commit 30846090a7

1 changed files with 19 additions and 2 deletions

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net/xfrm/xfrm_policy.c

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