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tcp: rstreason: fully support in tcp_rcv_synsent_state_process()

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In this function, only updating the map can finish the job for socket
reset reason because the corresponding drop reasons are ready.

Signed-off-by: Jason Xing <kernelxing@tencent.com>
Link: https://lore.kernel.org/r/20240510122502.27850-2-kerneljasonxing@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jason Xing 2024-05-10 20:24:58 +08:00 committed by Jakub Kicinski
parent 0621be48a8
commit 2b9669d634
1 changed files with 17 additions and 0 deletions
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17
include/net/rstreason.h
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@ -8,6 +8,8 @@
#define DEFINE_RST_REASON(FN, FNe) \
FN(NOT_SPECIFIED) \
FN(NO_SOCKET) \
FN(TCP_INVALID_ACK_SEQUENCE) \
FN(TCP_RFC7323_PAWS) \
FN(MPTCP_RST_EUNSPEC) \
FN(MPTCP_RST_EMPTCP) \
FN(MPTCP_RST_ERESOURCE) \
@ -37,6 +39,17 @@ enum sk_rst_reason {
SK_RST_REASON_NOT_SPECIFIED,
/** @SK_RST_REASON_NO_SOCKET: no valid socket that can be used */
SK_RST_REASON_NO_SOCKET,
/**
* @SK_RST_REASON_TCP_INVALID_ACK_SEQUENCE: Not acceptable ACK SEQ
* field because ack sequence is not in the window between snd_una
* and snd_nxt
*/
SK_RST_REASON_TCP_INVALID_ACK_SEQUENCE,
/**
* @SK_RST_REASON_TCP_RFC7323_PAWS: PAWS check, corresponding to
* LINUX_MIB_PAWSESTABREJECTED, LINUX_MIB_PAWSACTIVEREJECTED
*/
SK_RST_REASON_TCP_RFC7323_PAWS,
/* Copy from include/uapi/linux/mptcp.h.
* These reset fields will not be changed since they adhere to
@ -113,6 +126,10 @@ sk_rst_convert_drop_reason(enum skb_drop_reason reason)
return SK_RST_REASON_NOT_SPECIFIED;
case SKB_DROP_REASON_NO_SOCKET:
return SK_RST_REASON_NO_SOCKET;
case SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE:
return SK_RST_REASON_TCP_INVALID_ACK_SEQUENCE;
case SKB_DROP_REASON_TCP_RFC7323_PAWS:
return SK_RST_REASON_TCP_RFC7323_PAWS;
default:
/* If we don't have our own corresponding reason */
return SK_RST_REASON_NOT_SPECIFIED;