From: Kirill Tkhai <ktkhai@virtuozzo.com>
To: netdev@vger.kernel.org, davem@davemloft.net
Cc: eric.dumazet@gmail.com, ktkhai@virtuozzo.com, ebiederm@xmission.com
Subject: [PATCH 3/3] net: Remove spinlock from get_net_ns_by_id()
Date: Thu, 21 Dec 2017 16:14:21 +0300 [thread overview]
Message-ID: <151386205963.3724.7673833316098613356.stgit@localhost.localdomain> (raw)
In-Reply-To: <151386201910.3724.7199367937841370542.stgit@localhost.localdomain>
idr_find() is safe under rcu_read_lock() and
maybe_get_net() guarantees that net is alive.
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
---
net/core/net_namespace.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 6a4eab438221..a675f35a18ff 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -279,11 +279,9 @@ struct net *get_net_ns_by_id(struct net *net, int id)
return NULL;
rcu_read_lock();
- spin_lock_bh(&net->nsid_lock);
peer = idr_find(&net->netns_ids, id);
if (peer)
peer = maybe_get_net(peer);
- spin_unlock_bh(&net->nsid_lock);
rcu_read_unlock();
return peer;
next prev parent reply other threads:[~2017-12-21 13:14 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-21 13:13 [PATCH 1/3] net: Fix possible race in peernet2id_alloc() Kirill Tkhai
2017-12-21 13:14 ` [PATCH 2/3] net: Add BUG_ON() to get_net() Kirill Tkhai
2017-12-21 13:14 ` Kirill Tkhai [this message]
2017-12-21 17:39 ` [PATCH 1/3] net: Fix possible race in peernet2id_alloc() Eric W. Biederman
2017-12-22 10:30 ` Kirill Tkhai
2017-12-28 12:55 ` Kirill Tkhai
2017-12-28 17:17 ` David Miller
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