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| author | Xin Long <lucien.xin@gmail.com> | 2016-02-15 14:28:03 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-02-17 15:41:54 -0500 |
| commit | f46c7011b062726b798fa3326b5b0c2711ead2a0 (patch) | |
| tree | 9215761a2e50d904ae301f366deea5aa4d2da6f0 /net/sctp/input.c | |
| parent | bd4508e8507cbeee3c0fd96a1f96327b07c490b9 (diff) | |
| download | lwn-f46c7011b062726b798fa3326b5b0c2711ead2a0.tar.gz lwn-f46c7011b062726b798fa3326b5b0c2711ead2a0.zip | |
sctp: move rcu_read_lock from __sctp_lookup_association to sctp_lookup_association
__sctp_lookup_association() is only invoked by sctp_v4_err() and
sctp_rcv(), both which run on the rx BH, and it has been protected
by rcu_read_lock [see ip_local_deliver_finish() / ipv6_rcv()].
So we can move it to sctp_lookup_association, only let
sctp_lookup_association use rcu_read_lock.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/input.c')
| -rw-r--r-- | net/sctp/input.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/sctp/input.c b/net/sctp/input.c index 49d2cc751386..21a2d6b7abaf 100644 --- a/net/sctp/input.c +++ b/net/sctp/input.c @@ -937,7 +937,6 @@ static struct sctp_association *__sctp_lookup_association( struct sctp_transport *t; struct sctp_association *asoc = NULL; - rcu_read_lock(); t = sctp_addrs_lookup_transport(net, local, peer); if (!t || !sctp_transport_hold(t)) goto out; @@ -949,7 +948,6 @@ static struct sctp_association *__sctp_lookup_association( sctp_transport_put(t); out: - rcu_read_unlock(); return asoc; } @@ -962,7 +960,9 @@ struct sctp_association *sctp_lookup_association(struct net *net, { struct sctp_association *asoc; + rcu_read_lock(); asoc = __sctp_lookup_association(net, laddr, paddr, transportp); + rcu_read_unlock(); return asoc; } |