[PATCH net-next 5/6] tcp: rstreason: introduce SK_RST_REASON_TCP_TIMEOUT for active reset
From: Jason Xing <hidden>
Date: 2024-07-30 13:35:42
Subsystem:
networking [general], networking [tcp], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Neal Cardwell, Linus Torvalds
From: Jason Xing <kernelxing@tencent.com> Only when user sets TCP_USER_TIMEOUT option and there is no left chance to proceed, we will send an RST to the other side. Signed-off-by: Jason Xing <kernelxing@tencent.com> --- include/net/rstreason.h | 7 +++++++ net/ipv4/tcp_timer.c | 2 +- 2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/include/net/rstreason.h b/include/net/rstreason.h
index fecaa57f1634..ca10aaebd768 100644
--- a/include/net/rstreason.h
+++ b/include/net/rstreason.h@@ -21,6 +21,7 @@ FN(TCP_ABORT_ON_LINGER) \ FN(TCP_ABORT_ON_MEMORY) \ FN(TCP_STATE) \ + FN(TCP_TIMEOUT) \ FN(MPTCP_RST_EUNSPEC) \ FN(MPTCP_RST_EMPTCP) \ FN(MPTCP_RST_ERESOURCE) \
@@ -108,6 +109,12 @@ enum sk_rst_reason { * Please see RFC 793 for all possible reset conditions */ SK_RST_REASON_TCP_STATE, + /** + * @SK_RST_REASON_TCP_TIMEOUT: time to timeout + * When user sets TCP_USER_TIMEOUT options and run out of all the + * chance, we have to reset the connection + */ + SK_RST_REASON_TCP_TIMEOUT, /* Copy from include/uapi/linux/mptcp.h. * These reset fields will not be changed since they adhere to
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 3910f6d8614e..bd403300e4c4 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c@@ -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_TIMEOUT); tcp_write_err(sk); goto out; }
--
2.37.3