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tcp: introduce dropreasons in receive path

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Soon later patches can use these relatively more accurate
reasons to recognise and find out the cause.

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 11:22:23 +08:00 committed by David S. Miller
parent 253541a3c1
commit 3d359faba1
1 changed files with 14 additions and 1 deletions
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15
include/net/dropreason-core.h
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@ -30,6 +30,7 @@
FN(TCP_AOFAILURE) \
FN(SOCKET_BACKLOG) \
FN(TCP_FLAGS) \
FN(TCP_ABORT_ON_DATA) \
FN(TCP_ZEROWINDOW) \
FN(TCP_OLD_DATA) \
FN(TCP_OVERWINDOW) \
@ -37,6 +38,7 @@
FN(TCP_RFC7323_PAWS) \
FN(TCP_OLD_SEQUENCE) \
FN(TCP_INVALID_SEQUENCE) \
FN(TCP_INVALID_ACK_SEQUENCE) \
FN(TCP_RESET) \
FN(TCP_INVALID_SYN) \
FN(TCP_CLOSE) \
@ -204,6 +206,11 @@ enum skb_drop_reason {
SKB_DROP_REASON_SOCKET_BACKLOG,
/** @SKB_DROP_REASON_TCP_FLAGS: TCP flags invalid */
SKB_DROP_REASON_TCP_FLAGS,
/**
* @SKB_DROP_REASON_TCP_ABORT_ON_DATA: abort on data, corresponding to
* LINUX_MIB_TCPABORTONDATA
*/
SKB_DROP_REASON_TCP_ABORT_ON_DATA,
/**
* @SKB_DROP_REASON_TCP_ZEROWINDOW: TCP receive window size is zero,
* see LINUX_MIB_TCPZEROWINDOWDROP
@ -228,13 +235,19 @@ enum skb_drop_reason {
SKB_DROP_REASON_TCP_OFOMERGE,
/**
* @SKB_DROP_REASON_TCP_RFC7323_PAWS: PAWS check, corresponding to
* LINUX_MIB_PAWSESTABREJECTED
* LINUX_MIB_PAWSESTABREJECTED, LINUX_MIB_PAWSACTIVEREJECTED
*/
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_INVALID_ACK_SEQUENCE: Not acceptable ACK SEQ
* field because ack sequence is not in the window between snd_una
* and snd_nxt
*/
SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE,
/** @SKB_DROP_REASON_TCP_RESET: Invalid RST packet */
SKB_DROP_REASON_TCP_RESET,
/**