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From: Florian Westphal <fw@strlen.de>
To: <netdev@vger.kernel.org>
Cc: Florian Westphal <fw@strlen.de>
Subject: [PATCH ipsec-next 7/8] xfrm: policy: don't acquire policy lock in xfrm_spd_getinfo
Date: Thu, 11 Aug 2016 15:17:58 +0200	[thread overview]
Message-ID: <1470921479-25592-8-git-send-email-fw@strlen.de> (raw)
In-Reply-To: <1470921479-25592-1-git-send-email-fw@strlen.de>

It doesn't seem that important.

We now get inconsistent view of the counters, but those are stale anyway
right after we drop the lock.

Signed-off-by: Florian Westphal <fw@strlen.de>
---
 net/xfrm/xfrm_policy.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 575a48b..3ff5893 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -560,7 +560,6 @@ static inline int xfrm_byidx_should_resize(struct net *net, int total)
 
 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si)
 {
-	read_lock_bh(&net->xfrm.xfrm_policy_lock);
 	si->incnt = net->xfrm.policy_count[XFRM_POLICY_IN];
 	si->outcnt = net->xfrm.policy_count[XFRM_POLICY_OUT];
 	si->fwdcnt = net->xfrm.policy_count[XFRM_POLICY_FWD];
@@ -569,7 +568,6 @@ void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si)
 	si->fwdscnt = net->xfrm.policy_count[XFRM_POLICY_FWD+XFRM_POLICY_MAX];
 	si->spdhcnt = net->xfrm.policy_idx_hmask;
 	si->spdhmcnt = xfrm_policy_hashmax;
-	read_unlock_bh(&net->xfrm.xfrm_policy_lock);
 }
 EXPORT_SYMBOL(xfrm_spd_getinfo);
 
-- 
2.7.3

  parent reply	other threads:[~2016-08-11 13:18 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-11 13:17 Subject: [PATCH ipsec-next 0/8] xfrm: policy: convert lookups to rcu Florian Westphal
2016-08-11 13:17 ` [PATCH ipsec-next 1/8] xfrm: policy: use rcu versions for iteration and list add/del Florian Westphal
2016-08-11 13:17 ` [PATCH ipsec-next 2/8] xfrm: policy: prepare policy_bydst hash for rcu lookups Florian Westphal
2016-08-11 13:17 ` [PATCH ipsec-next 3/8] xfrm: policy: add sequence count to sync with hash resize Florian Westphal
2016-08-11 13:17 ` [PATCH ipsec-next 4/8] xfrm: policy: use atomic_inc_not_zero in rcu section Florian Westphal
2016-08-11 13:17 ` [PATCH ipsec-next 5/8] xfrm: policy: make xfrm_policy_lookup_bytype lockless Florian Westphal
2016-08-11 13:17 ` [PATCH ipsec-next 6/8] xfrm: policy: only use rcu in xfrm_sk_policy_lookup Florian Westphal
2016-11-16 16:43   ` Nicolas Dichtel
2016-11-16 17:30     ` Florian Westphal
2016-11-17  8:55       ` Nicolas Dichtel
2016-08-11 13:17 ` Florian Westphal [this message]
2016-08-11 13:17 ` [PATCH ipsec-next 8/8] xfrm: policy: convert policy_lock to spinlock Florian Westphal
2016-08-24 11:28   ` Steffen Klassert
2016-08-24 11:30     ` Florian Westphal
2016-08-12  8:22 ` Subject: [PATCH ipsec-next 0/8] xfrm: policy: convert lookups to rcu Steffen Klassert
2016-08-22  5:15   ` Steffen Klassert

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