Commit 0a399892 authored by Jason Xing's avatar Jason Xing Committed by David S. Miller
Browse files

tcp: rstreason: introduce SK_RST_REASON_TCP_KEEPALIVE_TIMEOUT for active reset 



Introducing this to show the users the reason of keepalive timeout.

Signed-off-by: default avatarJason Xing <kernelxing@tencent.com>
Reviewed-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent edefba66

include/net/rstreason.h

+7 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
	FN(TCP_ABORT_ON_LINGER)		\

	FN(TCP_ABORT_ON_MEMORY)		\

	FN(TCP_STATE)			\

	FN(TCP_KEEPALIVE_TIMEOUT)	\

	FN(MPTCP_RST_EUNSPEC)		\

	FN(MPTCP_RST_EMPTCP)		\

	FN(MPTCP_RST_ERESOURCE)		\
@@ -108,6 +109,12 @@ enum sk_rst_reason { 
	 * Please see RFC 9293 for all possible reset conditions

	 */

	SK_RST_REASON_TCP_STATE,

	/**

	 * @SK_RST_REASON_TCP_KEEPALIVE_TIMEOUT: time to timeout

	 * When we have already run out of all the chances, which means

	 * keepalive timeout, we have to reset the connection

	 */

	SK_RST_REASON_TCP_KEEPALIVE_TIMEOUT,



	/* Copy from include/uapi/linux/mptcp.h.

	 * These reset fields will not be changed since they adhere to

net/ipv4/tcp_timer.c

+1 −1
Original line number Diff line number Diff line
@@ -807,7 +807,7 @@ static void tcp_keepalive_timer (struct timer_list *t) 
		    (user_timeout == 0 &&

		    icsk->icsk_probes_out >= keepalive_probes(tp))) {

			tcp_send_active_reset(sk, GFP_ATOMIC,

					      SK_RST_REASON_NOT_SPECIFIED);

					      SK_RST_REASON_TCP_KEEPALIVE_TIMEOUT);

			tcp_write_err(sk);

			goto out;

		}