diff options
| author | Eric Dumazet <edumazet@google.com> | 2023-02-01 17:43:45 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-02-02 21:14:50 -0800 |
| commit | 2798e36dc233a409a5d3f26f73029596dc504020 (patch) | |
| tree | 059e250ccf09225bbeb55b0123071aba7caed1ee /net/ipv6/tcp_ipv6.c | |
| parent | 0719bc3a5c77091192c57e440896a969cd1cf885 (diff) | |
| download | linux-2798e36dc233a409a5d3f26f73029596dc504020.tar.gz | |
tcp: add TCP_MINTTL drop reason
In the unlikely case incoming packets are dropped because
of IP_MINTTL / IPV6_MINHOPCOUNT constraints...
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230201174345.2708943-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv6/tcp_ipv6.c')
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 11b736a76bd7e..543ee21677208 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1708,8 +1708,9 @@ process: if (static_branch_unlikely(&ip6_min_hopcount)) { /* min_hopcount can be changed concurrently from do_ipv6_setsockopt() */ - if (hdr->hop_limit < READ_ONCE(tcp_inet6_sk(sk)->min_hopcount)) { + if (unlikely(hdr->hop_limit < READ_ONCE(tcp_inet6_sk(sk)->min_hopcount))) { __NET_INC_STATS(net, LINUX_MIB_TCPMINTTLDROP); + drop_reason = SKB_DROP_REASON_TCP_MINTTL; goto discard_and_relse; } } |