diff options
| author | Eric Dumazet | 2015-10-05 06:08:11 +0200 |
|---|---|---|
| committer | David S. Miller | 2015-10-05 11:45:27 +0200 |
| commit | a1a5344ddbe8fd3e080013b317ac9a664490cfdf (patch) | |
| tree | 75c793a05dd64db3df05f804e429bae45ead20d1 /net/ipv4/tcp_input.c | |
| parent | net: use sk_fullsock() in __netdev_pick_tx() (diff) | |
| download | kernel-qcow2-linux-a1a5344ddbe8fd3e080013b317ac9a664490cfdf.tar.gz kernel-qcow2-linux-a1a5344ddbe8fd3e080013b317ac9a664490cfdf.tar.xz kernel-qcow2-linux-a1a5344ddbe8fd3e080013b317ac9a664490cfdf.zip | |
tcp: avoid two atomic ops for syncookies
inet_reqsk_alloc() is used to allocate a temporary request
in order to generate a SYNACK with a cookie. Then later,
syncookie validation also uses a temporary request.
These paths already took a reference on listener refcount,
we can avoid a couple of atomic operations.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index a95c8eb04ff7..ddadb318e850 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -6042,9 +6042,11 @@ static void tcp_openreq_init(struct request_sock *req, } struct request_sock *inet_reqsk_alloc(const struct request_sock_ops *ops, - struct sock *sk_listener) + struct sock *sk_listener, + bool attach_listener) { - struct request_sock *req = reqsk_alloc(ops, sk_listener); + struct request_sock *req = reqsk_alloc(ops, sk_listener, + attach_listener); if (req) { struct inet_request_sock *ireq = inet_rsk(req); @@ -6143,7 +6145,7 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops, goto drop; } - req = inet_reqsk_alloc(rsk_ops, sk); + req = inet_reqsk_alloc(rsk_ops, sk, !want_cookie); if (!req) goto drop; |