diff options
| author | Eric Dumazet <[email protected]> | 2024-04-11 08:25:29 +0000 |
|---|---|---|
| committer | Jakub Kicinski <[email protected]> | 2024-04-13 02:06:50 +0000 |
| commit | d13b05962369bade0fb8e2d55af56492f866cd36 (patch) | |
| tree | c2006efb24be6e55ebb7cc976080ee13fb9008f5 /net/ipv6/tcp_ipv6.c | |
| parent | Merge branch 'support-some-features-for-the-hns3-ethernet-driver' (diff) | |
| download | kernel-d13b05962369bade0fb8e2d55af56492f866cd36.tar.gz kernel-d13b05962369bade0fb8e2d55af56492f866cd36.zip | |
tcp: small optimization when TCP_TW_SYN is processed
When TCP_TW_SYN is processed, we perform a lookup to find
a listener and jump back in tcp_v6_rcv() and tcp_v4_rcv()
Paolo suggested that we do not have to check if the
found socket is a TIME_WAIT or NEW_SYN_RECV one.
Suggested-by: Paolo Abeni <[email protected]>
Link: https://lore.kernel.org/netdev/[email protected]/
Signed-off-by: Eric Dumazet <[email protected]>
Cc: Neal Cardwell <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
Diffstat (limited to 'net/ipv6/tcp_ipv6.c')
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 3aa9da5c9a66..bb7c3caf4f85 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1794,7 +1794,6 @@ lookup: if (!sk) goto no_tcp_socket; -process: if (sk->sk_state == TCP_TIME_WAIT) goto do_time_wait; @@ -1871,6 +1870,7 @@ process: } } +process: if (static_branch_unlikely(&ip6_min_hopcount)) { /* min_hopcount can be changed concurrently from do_ipv6_setsockopt() */ if (unlikely(hdr->hop_limit < READ_ONCE(tcp_inet6_sk(sk)->min_hopcount))) { |