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authorEric Dumazet <edumazet@google.com>2017-02-02 19:04:56 +0300
committerDavid S. Miller <davem@davemloft.net>2017-02-03 19:19:34 +0300
commit3541f9e8bdebce02458882b66b638d7302c1f616 (patch)
tree1049ef01f68f197e66fa77f18768aaf6d219f8b1 /net/ipv4/tcp_minisocks.c
parentff3edc9b8efc8200c25f3a5adfb1c1de0a882dc5 (diff)
downloadlinux-3541f9e8bdebce02458882b66b638d7302c1f616.tar.xz
tcp: add tcp_mss_clamp() helper
Small cleanup factorizing code doing the TCP_MAXSEG clamping. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_minisocks.c')
-rw-r--r--net/ipv4/tcp_minisocks.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index bdb443471c39..dff7d2aaf861 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -360,15 +360,12 @@ void tcp_openreq_init_rwin(struct request_sock *req,
{
struct inet_request_sock *ireq = inet_rsk(req);
const struct tcp_sock *tp = tcp_sk(sk_listener);
- u16 user_mss = READ_ONCE(tp->rx_opt.user_mss);
int full_space = tcp_full_space(sk_listener);
- int mss = dst_metric_advmss(dst);
u32 window_clamp;
__u8 rcv_wscale;
+ int mss;
- if (user_mss && user_mss < mss)
- mss = user_mss;
-
+ mss = tcp_mss_clamp(tp, dst_metric_advmss(dst));
window_clamp = READ_ONCE(tp->window_clamp);
/* Set this up on the first call only */
req->rsk_window_clamp = window_clamp ? : dst_metric(dst, RTAX_WINDOW);