diff options
| author | Eric Dumazet <edumazet@google.com> | 2023-07-19 06:47:54 +0000 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2023-07-20 12:49:40 +0200 |
| commit | b44693495af8f309b8ddec4b30833085d1c2d0c4 (patch) | |
| tree | 5ef6c99b79c43851bb837d7904fed7c6a2cab2f8 /include | |
| parent | af1e2cffbd2ef338b1d2e7318cb2516cc6380303 (diff) | |
tcp: add TCP_OLD_SEQUENCE drop reason
tcp_sequence() uses two conditions to decide to drop a packet,
and we currently report generic TCP_INVALID_SEQUENCE drop reason.
Duplicates are common, we need to distinguish them from
the other case.
I chose to not reuse TCP_OLD_DATA, and instead added
TCP_OLD_SEQUENCE drop reason.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230719064754.2794106-1-edumazet@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/dropreason-core.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/net/dropreason-core.h b/include/net/dropreason-core.h index a2b953b57689..f291a3b0f9e5 100644 --- a/include/net/dropreason-core.h +++ b/include/net/dropreason-core.h @@ -30,6 +30,7 @@ FN(TCP_OVERWINDOW) \ FN(TCP_OFOMERGE) \ FN(TCP_RFC7323_PAWS) \ + FN(TCP_OLD_SEQUENCE) \ FN(TCP_INVALID_SEQUENCE) \ FN(TCP_RESET) \ FN(TCP_INVALID_SYN) \ @@ -188,6 +189,8 @@ enum skb_drop_reason { * LINUX_MIB_PAWSESTABREJECTED */ SKB_DROP_REASON_TCP_RFC7323_PAWS, + /** @SKB_DROP_REASON_TCP_OLD_SEQUENCE: Old SEQ field (duplicate packet) */ + SKB_DROP_REASON_TCP_OLD_SEQUENCE, /** @SKB_DROP_REASON_TCP_INVALID_SEQUENCE: Not acceptable SEQ field */ SKB_DROP_REASON_TCP_INVALID_SEQUENCE, /** @SKB_DROP_REASON_TCP_RESET: Invalid RST packet */ |