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Date: Mon, 18 Jan 2010 17:28:57 +0900
From: Koki Sanagi <sanagi.koki@...fujitsu.com>
To: netdev@...r.kernel.org, davem@...emloft.net, nhorman@...driver.com
CC: izumi.taku@...fujitsu.com, kaneshige.kenji@...fujitsu.com
Subject: [PATCH 4/5] tracing/events: add tracepoint to UDP protocol
This patch adds tracepoints at UDP protocol.
udp_sendmsg entry of UDP layer(transmit)
udp_sendpage entry of UDP layer(transmit)
udp_push_pending_frames all data(udp_sendmsg have) have copied to skb
udp_rcv entry of UDP layer(receive).
Signed-off-by: Koki Sanagi <sanagi.koki@...fujitsu.com>
---
include/trace/events/skb.h | 86 ++++++++++++++++++++++++++++++++++++++++++++
net/ipv4/udp.c | 5 +++
2 files changed, 91 insertions(+), 0 deletions(-)
diff --git a/include/trace/events/skb.h b/include/trace/events/skb.h
index fbc25e8..1287934 100644
--- a/include/trace/events/skb.h
+++ b/include/trace/events/skb.h
@@ -6,7 +6,9 @@
#include <linux/skbuff.h>
#include <linux/netdevice.h>
+#include <net/inet_sock.h>
#include <linux/ip.h>
+#include <linux/udp.h>
#include <linux/tracepoint.h>
#define FORMAT_IPADDR(x) ((unsigned char *)&x)[3],\
@@ -154,6 +156,90 @@ TRACE_EVENT(ip_frag_reasm,
__entry->skbaddr, __entry->len)
);
+TRACE_EVENT(udp_sendmsg,
+
+ TP_PROTO(struct sock *sk, size_t len),
+
+ TP_ARGS(sk, len),
+
+ TP_STRUCT__entry(
+ __field( const void *, skaddr )
+ __field( size_t, len )
+ ),
+
+ TP_fast_assign(
+ __entry->skaddr = sk;
+ __entry->len = len;
+ ),
+
+ TP_printk("sk=%p len=%u",
+ __entry->skaddr, __entry->len)
+);
+
+TRACE_EVENT(udp_sendpage,
+
+ TP_PROTO(struct sock *sk, size_t len),
+
+ TP_ARGS(sk, len),
+
+ TP_STRUCT__entry(
+ __field( const void *, skaddr )
+ __field( size_t, len )
+ ),
+
+ TP_fast_assign(
+ __entry->skaddr = sk;
+ __entry->len = len;
+ ),
+
+ TP_printk("sk=%p len=%u",
+ __entry->skaddr, __entry->len)
+);
+
+TRACE_EVENT(udp_push_pending_frames,
+
+ TP_PROTO(struct sock *sk),
+
+ TP_ARGS(sk),
+
+ TP_STRUCT__entry(
+ __field( const void *, skaddr )
+ __field( unsigned short, sport )
+ __field( unsigned short, dport )
+ ),
+
+ TP_fast_assign(
+ __entry->skaddr = sk;
+ __entry->sport = ntohs(inet_sk(sk)->inet_sport);
+ __entry->dport = ntohs(inet_sk(sk)->inet_dport);
+ ),
+
+ TP_printk("sk=%p sport=%u dport=%u",
+ __entry->skaddr, __entry->sport, __entry->dport)
+);
+
+TRACE_EVENT(udp_rcv,
+
+ TP_PROTO(struct sk_buff *skb),
+
+ TP_ARGS(skb),
+
+ TP_STRUCT__entry(
+ __field( const void *, skbaddr )
+ __field( unsigned short, sport )
+ __field( unsigned short, dport )
+ ),
+
+ TP_fast_assign(
+ __entry->skbaddr = skb;
+ __entry->sport = ntohs(udp_hdr(skb)->source);
+ __entry->dport = ntohs(udp_hdr(skb)->dest);
+ ),
+
+ TP_printk("skbaddr=%p sport=%u dport=%u",
+ __entry->skbaddr, __entry->sport, __entry->dport)
+);
+
TRACE_EVENT(raw_sendmsg,
TP_PROTO(struct sock *sk, size_t len),
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index f0126fd..c0389ec 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -104,6 +104,7 @@
#include <net/route.h>
#include <net/checksum.h>
#include <net/xfrm.h>
+#include <trace/events/skb.h>
#include "udp_impl.h"
struct udp_table udp_table __read_mostly;
@@ -715,6 +716,7 @@ static int udp_push_pending_frames(struct sock *sk)
int is_udplite = IS_UDPLITE(sk);
__wsum csum = 0;
+ trace_udp_push_pending_frames(sk);
/* Grab the skbuff where UDP header space exists. */
if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
goto out;
@@ -784,6 +786,7 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
int corkreq = up->corkflag || msg->msg_flags&MSG_MORE;
int (*getfrag)(void *, char *, int, int, int, struct sk_buff *);
+ trace_udp_sendmsg(sk, len);
if (len > 0xFFFF)
return -EMSGSIZE;
@@ -990,6 +993,7 @@ int udp_sendpage(struct sock *sk, struct page *page, int offset,
struct udp_sock *up = udp_sk(sk);
int ret;
+ trace_udp_sendpage(sk, size);
if (!up->pending) {
struct msghdr msg = { .msg_flags = flags|MSG_MORE };
@@ -1608,6 +1612,7 @@ drop:
int udp_rcv(struct sk_buff *skb)
{
+ trace_udp_rcv(skb);
return __udp4_lib_rcv(skb, &udp_table, IPPROTO_UDP);
}
--
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