netdev - [PATCH net-next 1/9] mptcp: add tracepoint in mptcp_sendmsg

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Date:   Mon,  7 Mar 2022 12:44:31 -0800
From:   Mat Martineau <mathew.j.martineau@...ux.intel.com>
To:     netdev@...r.kernel.org
Cc:     Geliang Tang <geliang.tang@...e.com>, davem@...emloft.net,
        kuba@...nel.org, matthieu.baerts@...sares.net,
        mptcp@...ts.linux.dev,
        Mat Martineau <mathew.j.martineau@...ux.intel.com>
Subject: [PATCH net-next 1/9] mptcp: add tracepoint in mptcp_sendmsg_frag

From: Geliang Tang <geliang.tang@...e.com>

The tracepoint in get_mapping_status() only dumped the incoming mpext
fields. This patch added a new tracepoint in mptcp_sendmsg_frag() to dump
the outgoing mpext too.

Signed-off-by: Geliang Tang <geliang.tang@...e.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@...ux.intel.com>
---
 include/trace/events/mptcp.h | 4 ++++
 net/mptcp/protocol.c         | 1 +
 2 files changed, 5 insertions(+)

diff --git a/include/trace/events/mptcp.h b/include/trace/events/mptcp.h
index 6bf43176f14c..f8e28e686c65 100644
--- a/include/trace/events/mptcp.h
+++ b/include/trace/events/mptcp.h
@@ -115,6 +115,10 @@ DECLARE_EVENT_CLASS(mptcp_dump_mpext,
 		  __entry->csum_reqd)
 );
 
+DEFINE_EVENT(mptcp_dump_mpext, mptcp_sendmsg_frag,
+	TP_PROTO(struct mptcp_ext *mpext),
+	TP_ARGS(mpext));
+
 DEFINE_EVENT(mptcp_dump_mpext, get_mapping_status,
 	TP_PROTO(struct mptcp_ext *mpext),
 	TP_ARGS(mpext));
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 1c72f25f083e..36a7d33f670a 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -1356,6 +1356,7 @@ static int mptcp_sendmsg_frag(struct sock *sk, struct sock *ssk,
 out:
 	if (READ_ONCE(msk->csum_enabled))
 		mptcp_update_data_checksum(skb, copy);
+	trace_mptcp_sendmsg_frag(mpext);
 	mptcp_subflow_ctx(ssk)->rel_write_seq += copy;
 	return copy;
 }
-- 
2.35.1