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tcp: add a dropreason definitions and prepare for cookie check

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Adding one drop reason to detect the condition of skb dropped
because of hook points in cookie check and extending NO_SOCKET
to consider another two cases can be used later.

Signed-off-by: Jason Xing <kernelxing@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jason Xing 2024-02-26 11:22:18 +08:00 committed by David S. Miller
parent 12a686c2e7
commit 48e4704aed
1 changed files with 10 additions and 1 deletions
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11
include/net/dropreason-core.h
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@ -54,6 +54,7 @@
FN(NEIGH_QUEUEFULL) \
FN(NEIGH_DEAD) \
FN(TC_EGRESS) \
FN(SECURITY_HOOK) \
FN(QDISC_DROP) \
FN(CPU_BACKLOG) \
FN(XDP) \
@ -105,7 +106,13 @@ enum skb_drop_reason {
SKB_CONSUMED,
/** @SKB_DROP_REASON_NOT_SPECIFIED: drop reason is not specified */
SKB_DROP_REASON_NOT_SPECIFIED,
/** @SKB_DROP_REASON_NO_SOCKET: socket not found */
/**
* @SKB_DROP_REASON_NO_SOCKET: no valid socket that can be used.
* Reason could be one of three cases:
* 1) no established/listening socket found during lookup process
* 2) no valid request socket during 3WHS process
* 3) no valid child socket during 3WHS process
*/
SKB_DROP_REASON_NO_SOCKET,
/** @SKB_DROP_REASON_PKT_TOO_SMALL: packet size is too small */
SKB_DROP_REASON_PKT_TOO_SMALL,
@ -271,6 +278,8 @@ enum skb_drop_reason {
SKB_DROP_REASON_NEIGH_DEAD,
/** @SKB_DROP_REASON_TC_EGRESS: dropped in TC egress HOOK */
SKB_DROP_REASON_TC_EGRESS,
/** @SKB_DROP_REASON_SECURITY_HOOK: dropped due to security HOOK */
SKB_DROP_REASON_SECURITY_HOOK,
/**
* @SKB_DROP_REASON_QDISC_DROP: dropped by qdisc when packet outputting (
* failed to enqueue to current qdisc)