netdev - [Patch net-next 01/13] net: introduce a new header file include/trace/events/ip.h

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Date:   Thu,  5 Aug 2021 11:57:38 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     netdev@...r.kernel.org
Cc:     Qitao Xu <qitao.xu@...edance.com>,
        Cong Wang <cong.wang@...edance.com>
Subject: [Patch net-next 01/13] net: introduce a new header file include/trace/events/ip.h

From: Qitao Xu <qitao.xu@...edance.com>

Header file include/trace/events/ip.h is introduced to define
IP/IPv6 layer tracepoints.

Reviewed-by: Cong Wang <cong.wang@...edance.com>
Signed-off-by: Qitao Xu <qitao.xu@...edance.com>
---
 include/trace/events/ip.h | 47 +++++++++++++++++++++++++++++++++++++++
 net/core/net-traces.c     |  1 +
 2 files changed, 48 insertions(+)
 create mode 100644 include/trace/events/ip.h

diff --git a/include/trace/events/ip.h b/include/trace/events/ip.h
new file mode 100644
index 000000000000..008f821ebc50
--- /dev/null
+++ b/include/trace/events/ip.h
@@ -0,0 +1,47 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM ip
+
+#if !defined(_TRACE_IP_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_IP_H
+
+#include <linux/ipv6.h>
+#include <linux/tcp.h>
+#include <linux/tracepoint.h>
+#include <net/ipv6.h>
+#include <net/tcp.h>
+#include <linux/sock_diag.h>
+
+#define TP_STORE_V4MAPPED(__entry, saddr, daddr)		\
+	do {							\
+		struct in6_addr *pin6;				\
+								\
+		pin6 = (struct in6_addr *)__entry->saddr_v6;	\
+		ipv6_addr_set_v4mapped(saddr, pin6);		\
+		pin6 = (struct in6_addr *)__entry->daddr_v6;	\
+		ipv6_addr_set_v4mapped(daddr, pin6);		\
+	} while (0)
+
+#if IS_ENABLED(CONFIG_IPV6)
+#define TP_STORE_ADDRS(__entry, saddr, daddr, saddr6, daddr6)		\
+	do {								\
+		if (sk->sk_family == AF_INET6) {			\
+			struct in6_addr *pin6;				\
+									\
+			pin6 = (struct in6_addr *)__entry->saddr_v6;	\
+			*pin6 = saddr6;					\
+			pin6 = (struct in6_addr *)__entry->daddr_v6;	\
+			*pin6 = daddr6;					\
+		} else {						\
+			TP_STORE_V4MAPPED(__entry, saddr, daddr);	\
+		}							\
+	} while (0)
+#else
+#define TP_STORE_ADDRS(__entry, saddr, daddr, saddr6, daddr6)	\
+	TP_STORE_V4MAPPED(__entry, saddr, daddr)
+#endif
+
+#endif /* _TRACE_IP_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
diff --git a/net/core/net-traces.c b/net/core/net-traces.c
index c40cd8dd75c7..e1bd46076ad0 100644
--- a/net/core/net-traces.c
+++ b/net/core/net-traces.c
@@ -35,6 +35,7 @@
 #include <trace/events/tcp.h>
 #include <trace/events/fib.h>
 #include <trace/events/qdisc.h>
+#include <trace/events/ip.h>
 #if IS_ENABLED(CONFIG_BRIDGE)
 #include <trace/events/bridge.h>
 EXPORT_TRACEPOINT_SYMBOL_GPL(br_fdb_add);
-- 
2.27.0