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Date: Thu, 29 Dec 2022 16:02:07 +0800
From: Yunhui Cui <cuiyunhui@...edance.com>
To: edumazet@...gle.com, rostedt@...dmis.org, mhiramat@...nel.org,
davem@...emloft.net, yoshfuji@...ux-ipv6.org, dsahern@...nel.org,
kuba@...nel.org, pabeni@...hat.com, duanxiongchun@...edance.com,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-trace-kernel@...r.kernel.org, cuiyunhui@...edance.com
Subject: [PATCH] tcp/udp: add tracepoint for send recv length
From: Xiongchun Duan <duanxiongchun@...edance.com>
Add a tracepoint for capturing TCP segments with
a send or receive length. This makes it easy to obtain
the packet sending and receiving information of each process
in the user mode, such as the netatop tool.
Signed-off-by: Xiongchun Duan <duanxiongchun@...edance.com>
---
include/trace/events/tcp.h | 41 ++++++++++++++++++++++++++++++++++++++
include/trace/events/udp.h | 34 +++++++++++++++++++++++++++++++
net/ipv4/tcp.c | 7 +++++++
net/ipv4/udp.c | 11 ++++++++--
4 files changed, 91 insertions(+), 2 deletions(-)
diff --git a/include/trace/events/tcp.h b/include/trace/events/tcp.h
index 901b440238d5..d9973c8508d1 100644
--- a/include/trace/events/tcp.h
+++ b/include/trace/events/tcp.h
@@ -187,6 +187,47 @@ DEFINE_EVENT(tcp_event_sk, tcp_rcv_space_adjust,
TP_ARGS(sk)
);
+/*
+ * tcp send/recv stream length
+ *
+ * Note: this class requires positive integer
+ */
+DECLARE_EVENT_CLASS(tcp_stream_length,
+
+ TP_PROTO(struct sock *sk, int length, int error, int flags),
+
+ TP_ARGS(sk, length, error, flags),
+
+ TP_STRUCT__entry(
+ __field(void *, sk)
+ __field(int, length)
+ __field(int, error)
+ __field(int, flags)
+ ),
+
+ TP_fast_assign(
+ __entry->sk = sk;
+ __entry->length = length;
+ __entry->error = error;
+ __entry->flags = flags;
+ ),
+
+ TP_printk("sk address = %p, length = %d, error = %d flags = %u ",
+ __entry->sk, __entry->length, __entry->error, __entry->flags)
+);
+
+DEFINE_EVENT(tcp_stream_length, tcp_send_length,
+ TP_PROTO(struct sock *sk, int length, int error, int flags),
+
+ TP_ARGS(sk, length, error, flags)
+);
+
+DEFINE_EVENT(tcp_stream_length, tcp_recv_length,
+ TP_PROTO(struct sock *sk, int length, int error, int flags),
+
+ TP_ARGS(sk, length, error, flags)
+);
+
TRACE_EVENT(tcp_retransmit_synack,
TP_PROTO(const struct sock *sk, const struct request_sock *req),
diff --git a/include/trace/events/udp.h b/include/trace/events/udp.h
index 336fe272889f..22181c91c8e2 100644
--- a/include/trace/events/udp.h
+++ b/include/trace/events/udp.h
@@ -27,6 +27,40 @@ TRACE_EVENT(udp_fail_queue_rcv_skb,
TP_printk("rc=%d port=%hu", __entry->rc, __entry->lport)
);
+DECLARE_EVENT_CLASS(udp_stream_length,
+
+ TP_PROTO(struct sock *sk, int length, int error, int flags),
+
+ TP_ARGS(sk, length, error, flags),
+
+ TP_STRUCT__entry(
+ __field(void *, sk)
+ __field(int, length)
+ __field(int, error)
+ __field(int, flags)
+ ),
+
+ TP_fast_assign(
+ __entry->sk = sk;
+ __entry->length = length;
+ __entry->error = error;
+ __entry->flags = flags;
+ ),
+
+ TP_printk("sk address = %p, length = %d, error=%d, flags = %u ",
+ __entry->sk, __entry->length, __entry->error, __entry->flags)
+);
+
+DEFINE_EVENT(udp_stream_length, udp_send_length,
+ TP_PROTO(struct sock *sk, int length, int error, int flags),
+ TP_ARGS(sk, length, error, flags)
+);
+
+DEFINE_EVENT(udp_stream_length, udp_recv_length,
+ TP_PROTO(struct sock *sk, int length, int error, int flags),
+ TP_ARGS(sk, length, error, flags)
+);
+
#endif /* _TRACE_UDP_H */
/* This part must be outside protection */
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index c567d5e8053e..5deb69e2d3e7 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -267,6 +267,7 @@
#include <linux/errqueue.h>
#include <linux/static_key.h>
#include <linux/btf.h>
+#include <trace/events/tcp.h>
#include <net/icmp.h>
#include <net/inet_common.h>
@@ -1150,6 +1151,7 @@ int tcp_sendpage(struct sock *sk, struct page *page, int offset,
lock_sock(sk);
ret = tcp_sendpage_locked(sk, page, offset, size, flags);
release_sock(sk);
+ trace_tcp_send_length(sk, ret > 0 ? ret : 0, ret > 0 ? 0 : ret, 0);
return ret;
}
@@ -1482,6 +1484,7 @@ int tcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
lock_sock(sk);
ret = tcp_sendmsg_locked(sk, msg, size);
release_sock(sk);
+ trace_tcp_send_length(sk, ret > 0 ? ret : 0, ret > 0 ? 0 : ret, 0);
return ret;
}
@@ -2647,6 +2650,10 @@ static int tcp_recvmsg_locked(struct sock *sk, struct msghdr *msg, size_t len,
/* Clean up data we have read: This will do ACK frames. */
tcp_cleanup_rbuf(sk, copied);
+ trace_tcp_recv_length(sk, (copied > 0 && !(flags & MSG_PEEK)) ?
+ copied : 0,
+ (copied > 0 &&
+ !(flags & MSG_PEEK)) ? 0 : copied, flags);
return copied;
out:
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 9592fe3e444a..1b336af4df6d 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1300,6 +1300,7 @@ int udp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
release_sock(sk);
out:
+ trace_udp_send_length(sk, err == 0 ? len : 0, err, 0);
ip_rt_put(rt);
out_free:
if (free)
@@ -1364,8 +1365,10 @@ int udp_sendpage(struct sock *sk, struct page *page, int offset,
page, offset, size, flags);
if (ret == -EOPNOTSUPP) {
release_sock(sk);
- return sock_no_sendpage(sk->sk_socket, page, offset,
- size, flags);
+ ret = sock_no_sendpage(sk->sk_socket, page, offset,
+ size, flags);
+ trace_udp_send_length(sk, ret > 0 ? ret : 0, ret > 0 ? 0 : ret, 0);
+ return ret;
}
if (ret < 0) {
udp_flush_pending_frames(sk);
@@ -1377,6 +1380,7 @@ int udp_sendpage(struct sock *sk, struct page *page, int offset,
ret = udp_push_pending_frames(sk);
if (!ret)
ret = size;
+ trace_udp_send_length(sk, ret > 0 ? ret : 0, ret > 0 ? 0 : ret, 0);
out:
release_sock(sk);
return ret;
@@ -1935,6 +1939,9 @@ int udp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int flags,
if (flags & MSG_TRUNC)
err = ulen;
+ trace_udp_recv_length(sk, (err > 0 && !peeking) ? err : 0,
+ (err > 0 && !peeking) ? 0 : err, flags);
+
skb_consume_udp(sk, skb, peeking ? -err : err);
return err;
--
2.20.1
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