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authorMasami Hiramatsu <mhiramat@kernel.org>2017-12-29 05:47:55 +0300
committerDavid S. Miller <davem@davemloft.net>2018-01-02 22:27:30 +0300
commitee549be6f061188f306133e3a66ce3d3c6758811 (patch)
treee7a89d34f4eea551ab552240b4dc531382dd6731 /net/dccp
parentfa4475f79251a0539e64c08b8b039be23d107dc9 (diff)
downloadlinux-ee549be6f061188f306133e3a66ce3d3c6758811.tar.xz
net: dccp: Add DCCP sendmsg trace event
Add DCCP sendmsg trace event (dccp/dccp_probe) for replacing dccpprobe. User can trace this event via ftrace or perftools. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp')
-rw-r--r--net/dccp/Makefile3
-rw-r--r--net/dccp/proto.c5
-rw-r--r--net/dccp/trace.h84
3 files changed, 92 insertions, 0 deletions
diff --git a/net/dccp/Makefile b/net/dccp/Makefile
index 2e7b56097bc4..4215f13a63af 100644
--- a/net/dccp/Makefile
+++ b/net/dccp/Makefile
@@ -27,3 +27,6 @@ dccp-$(CONFIG_SYSCTL) += sysctl.o
dccp_diag-y := diag.o
dccp_probe-y := probe.o
+
+# build with local directory for trace.h
+CFLAGS_proto.o := -I$(src)
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index 7a75a1d3568b..fa7e92e08920 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -38,6 +38,9 @@
#include "dccp.h"
#include "feat.h"
+#define CREATE_TRACE_POINTS
+#include "trace.h"
+
DEFINE_SNMP_STAT(struct dccp_mib, dccp_statistics) __read_mostly;
EXPORT_SYMBOL_GPL(dccp_statistics);
@@ -761,6 +764,8 @@ int dccp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
int rc, size;
long timeo;
+ trace_dccp_probe(sk, len);
+
if (len > dp->dccps_mss_cache)
return -EMSGSIZE;
diff --git a/net/dccp/trace.h b/net/dccp/trace.h
new file mode 100644
index 000000000000..5062421beee9
--- /dev/null
+++ b/net/dccp/trace.h
@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM dccp
+
+#if !defined(_TRACE_DCCP_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_DCCP_H
+
+#include <net/sock.h>
+#include "dccp.h"
+#include "ccids/ccid3.h"
+#include <linux/tracepoint.h>
+#include <trace/events/net_probe_common.h>
+
+TRACE_EVENT(dccp_probe,
+
+ TP_PROTO(struct sock *sk, size_t size),
+
+ TP_ARGS(sk, size),
+
+ TP_STRUCT__entry(
+ /* sockaddr_in6 is always bigger than sockaddr_in */
+ __array(__u8, saddr, sizeof(struct sockaddr_in6))
+ __array(__u8, daddr, sizeof(struct sockaddr_in6))
+ __field(__u16, sport)
+ __field(__u16, dport)
+ __field(__u16, size)
+ __field(__u16, tx_s)
+ __field(__u32, tx_rtt)
+ __field(__u32, tx_p)
+ __field(__u32, tx_x_calc)
+ __field(__u64, tx_x_recv)
+ __field(__u64, tx_x)
+ __field(__u32, tx_t_ipi)
+ ),
+
+ TP_fast_assign(
+ const struct inet_sock *inet = inet_sk(sk);
+ struct ccid3_hc_tx_sock *hc = NULL;
+
+ if (ccid_get_current_tx_ccid(dccp_sk(sk)) == DCCPC_CCID3)
+ hc = ccid3_hc_tx_sk(sk);
+
+ memset(__entry->saddr, 0, sizeof(struct sockaddr_in6));
+ memset(__entry->daddr, 0, sizeof(struct sockaddr_in6));
+
+ TP_STORE_ADDR_PORTS(__entry, inet, sk);
+
+ /* For filtering use */
+ __entry->sport = ntohs(inet->inet_sport);
+ __entry->dport = ntohs(inet->inet_dport);
+
+ __entry->size = size;
+ if (hc) {
+ __entry->tx_s = hc->tx_s;
+ __entry->tx_rtt = hc->tx_rtt;
+ __entry->tx_p = hc->tx_p;
+ __entry->tx_x_calc = hc->tx_x_calc;
+ __entry->tx_x_recv = hc->tx_x_recv >> 6;
+ __entry->tx_x = hc->tx_x >> 6;
+ __entry->tx_t_ipi = hc->tx_t_ipi;
+ } else {
+ __entry->tx_s = 0;
+ memset(&__entry->tx_rtt, 0, (void *)&__entry->tx_t_ipi -
+ (void *)&__entry->tx_rtt +
+ sizeof(__entry->tx_t_ipi));
+ }
+ ),
+
+ TP_printk("src=%pISpc dest=%pISpc size=%d tx_s=%d tx_rtt=%d "
+ "tx_p=%d tx_x_calc=%u tx_x_recv=%llu tx_x=%llu tx_t_ipi=%d",
+ __entry->saddr, __entry->daddr, __entry->size,
+ __entry->tx_s, __entry->tx_rtt, __entry->tx_p,
+ __entry->tx_x_calc, __entry->tx_x_recv, __entry->tx_x,
+ __entry->tx_t_ipi)
+);
+
+#endif /* _TRACE_TCP_H */
+
+/* This part must be outside protection */
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE trace
+#include <trace/define_trace.h>