From: Jason Xing <kerneljasonxing@gmail.com>
To: edumazet@google.com, dsahern@kernel.org, matttbe@kernel.org,
martineau@kernel.org, geliang@kernel.org, kuba@kernel.org,
pabeni@redhat.com, davem@davemloft.net, rostedt@goodmis.org,
mhiramat@kernel.org, mathieu.desnoyers@efficios.com,
atenart@kernel.org
Cc: mptcp@lists.linux.dev, netdev@vger.kernel.org,
linux-trace-kernel@vger.kernel.org, kerneljasonxing@gmail.com,
Jason Xing <kernelxing@tencent.com>
Subject: [PATCH net-next v6 7/7] rstreason: make it work in trace world
Date: Thu, 18 Apr 2024 21:32:48 +0800 [thread overview]
Message-ID: <20240418133248.56378-8-kerneljasonxing@gmail.com> (raw)
In-Reply-To: <20240418133248.56378-1-kerneljasonxing@gmail.com>
From: Jason Xing <kernelxing@tencent.com>
At last, we should let it work by introducing this reset reason in
trace world.
One of the possible expected outputs is:
... tcp_send_reset: skbaddr=xxx skaddr=xxx src=xxx dest=xxx
state=TCP_ESTABLISHED reason=NOT_SPECIFIED
Signed-off-by: Jason Xing <kernelxing@tencent.com>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
include/trace/events/tcp.h | 37 +++++++++++++++++++++++++++++++++----
net/ipv4/tcp_ipv4.c | 2 +-
net/ipv4/tcp_output.c | 2 +-
net/ipv6/tcp_ipv6.c | 2 +-
4 files changed, 36 insertions(+), 7 deletions(-)
diff --git a/include/trace/events/tcp.h b/include/trace/events/tcp.h
index 5c04a61a11c2..b1455cbc0634 100644
--- a/include/trace/events/tcp.h
+++ b/include/trace/events/tcp.h
@@ -11,6 +11,7 @@
#include <net/ipv6.h>
#include <net/tcp.h>
#include <linux/sock_diag.h>
+#include <net/rstreason.h>
/*
* tcp event with arguments sk and skb
@@ -74,20 +75,38 @@ DEFINE_EVENT(tcp_event_sk_skb, tcp_retransmit_skb,
TP_ARGS(sk, skb)
);
+#undef FN1
+#define FN1(reason) TRACE_DEFINE_ENUM(SK_RST_REASON_##reason);
+#undef FN2
+#define FN2(reason) TRACE_DEFINE_ENUM(SKB_DROP_REASON_##reason);
+DEFINE_RST_REASON(FN1, FN1)
+
+#undef FN1
+#undef FNe1
+#define FN1(reason) { SK_RST_REASON_##reason, #reason },
+#define FNe1(reason) { SK_RST_REASON_##reason, #reason }
+
+#undef FN2
+#undef FNe2
+#define FN2(reason) { SKB_DROP_REASON_##reason, #reason },
+#define FNe2(reason) { SKB_DROP_REASON_##reason, #reason }
/*
* skb of trace_tcp_send_reset is the skb that caused RST. In case of
* active reset, skb should be NULL
*/
TRACE_EVENT(tcp_send_reset,
- TP_PROTO(const struct sock *sk, const struct sk_buff *skb),
+ TP_PROTO(const struct sock *sk,
+ const struct sk_buff *skb,
+ const enum sk_rst_reason reason),
- TP_ARGS(sk, skb),
+ TP_ARGS(sk, skb, reason),
TP_STRUCT__entry(
__field(const void *, skbaddr)
__field(const void *, skaddr)
__field(int, state)
+ __field(enum sk_rst_reason, reason)
__array(__u8, saddr, sizeof(struct sockaddr_in6))
__array(__u8, daddr, sizeof(struct sockaddr_in6))
),
@@ -113,14 +132,24 @@ TRACE_EVENT(tcp_send_reset,
*/
TP_STORE_ADDR_PORTS_SKB(skb, th, entry->daddr, entry->saddr);
}
+ __entry->reason = reason;
),
- TP_printk("skbaddr=%p skaddr=%p src=%pISpc dest=%pISpc state=%s",
+ TP_printk("skbaddr=%p skaddr=%p src=%pISpc dest=%pISpc state=%s reason=%s",
__entry->skbaddr, __entry->skaddr,
__entry->saddr, __entry->daddr,
- __entry->state ? show_tcp_state_name(__entry->state) : "UNKNOWN")
+ __entry->state ? show_tcp_state_name(__entry->state) : "UNKNOWN",
+ __entry->reason < RST_REASON_START ?
+ __print_symbolic(__entry->reason, DEFINE_DROP_REASON(FN2, FNe2)) :
+ __print_symbolic(__entry->reason, DEFINE_RST_REASON(FN1, FNe1)))
);
+#undef FN1
+#undef FNe1
+
+#undef FN2
+#undef FNe2
+
/*
* tcp event with arguments sk
*
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index d78412cf8566..461b4d2b7cfe 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -871,7 +871,7 @@ static void tcp_v4_send_reset(const struct sock *sk, struct sk_buff *skb,
if (sk)
arg.bound_dev_if = sk->sk_bound_dev_if;
- trace_tcp_send_reset(sk, skb);
+ trace_tcp_send_reset(sk, skb, reason);
BUILD_BUG_ON(offsetof(struct sock, sk_bound_dev_if) !=
offsetof(struct inet_timewait_sock, tw_bound_dev_if));
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 276d9d541b01..b08ffb17d5a0 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -3612,7 +3612,7 @@ void tcp_send_active_reset(struct sock *sk, gfp_t priority,
/* skb of trace_tcp_send_reset() keeps the skb that caused RST,
* skb here is different to the troublesome skb, so use NULL
*/
- trace_tcp_send_reset(sk, NULL);
+ trace_tcp_send_reset(sk, NULL, SK_RST_REASON_NOT_SPECIFIED);
}
/* Send a crossed SYN-ACK during socket establishment.
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index c46095fb596c..6a4736ec3df0 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1133,7 +1133,7 @@ static void tcp_v6_send_reset(const struct sock *sk, struct sk_buff *skb,
label = ip6_flowlabel(ipv6h);
}
- trace_tcp_send_reset(sk, skb);
+ trace_tcp_send_reset(sk, skb, reason);
tcp_v6_send_response(sk, skb, seq, ack_seq, 0, 0, 0, oif, 1,
ipv6_get_dsfield(ipv6h), label, priority, txhash,
--
2.37.3
next prev parent reply other threads:[~2024-04-18 13:33 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-18 13:32 [PATCH net-next RESEND v6 0/7] Implement reset reason mechanism to detect Jason Xing
2024-04-18 13:32 ` [PATCH net-next v6 1/7] net: introduce rstreason to detect why the RST is sent Jason Xing
2024-04-18 13:32 ` [PATCH net-next v6 2/7] rstreason: prepare for passive reset Jason Xing
2024-04-18 13:32 ` [PATCH net-next v6 3/7] rstreason: prepare for active reset Jason Xing
2024-04-18 13:32 ` [PATCH net-next v6 4/7] tcp: support rstreason for passive reset Jason Xing
2024-04-18 13:32 ` [PATCH net-next v6 5/7] mptcp: " Jason Xing
2024-04-18 13:32 ` [PATCH net-next v6 6/7] mptcp: introducing a helper into active reset logic Jason Xing
2024-04-18 13:32 ` Jason Xing [this message]
2024-04-18 14:31 ` [PATCH net-next RESEND v6 0/7] Implement reset reason mechanism to detect MPTCP CI
-- strict thread matches above, loose matches on Subject: below --
2024-04-17 8:51 [PATCH net-next " Jason Xing
2024-04-17 8:51 ` [PATCH net-next v6 7/7] rstreason: make it work in trace world Jason Xing
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