Subject: [PATCH v2 net-next 2/3] net/ipv6: Udate fib6_table_lookup tracepoint

From: [email-masked]
Date: Wed, 23 May 2018 17:08:48 -0700

From: David Ahern <[email-masked]>

Commit bb0ad1987e96 ("ipv6: fib6_rules: support for match on sport, dport
and ip proto") added support for protocol and ports to FIB rules.
Update the FIB lookup tracepoint to dump the parameters.

Signed-off-by: David Ahern <[email-masked]>
---
 include/trace/events/fib6.h | 29 ++++++++++++++++++++++-------
 net/core/net-traces.c       |  4 ----
 net/ipv6/route.c            |  9 +++++++--
 3 files changed, 29 insertions(+), 13 deletions(-)

diff --git a/include/trace/events/fib6.h b/include/trace/events/fib6.h
index 1b8d951e3c12..b088b54d699c 100644
--- a/include/trace/events/fib6.h
+++ b/include/trace/events/fib6.h
@@ -19,7 +19,7 @@ TRACE_EVENT(fib6_table_lookup,
 
 	TP_STRUCT__entry(
 		__field(	u32,	tb_id		)
-
+		__field(	int,	err		)
 		__field(	int,	oif		)
 		__field(	int,	iif		)
 		__field(	__u8,	tos		)
@@ -27,7 +27,10 @@ TRACE_EVENT(fib6_table_lookup,
 		__field(	__u8,	flags		)
 		__array(	__u8,	src,	16	)
 		__array(	__u8,	dst,	16	)
-
+		__field(        u16,	sport		)
+		__field(        u16,	dport		)
+		__field(        u8,	proto		)
+		__field(        u8,	rt_type		)
 		__dynamic_array(	char,	name,	IFNAMSIZ )
 		__array(		__u8,	gw,	16	 )
 	),
@@ -36,6 +39,7 @@ TRACE_EVENT(fib6_table_lookup,
 		struct in6_addr *in6;
 
 		__entry->tb_id = table->tb6_id;
+		__entry->err = ip6_rt_type_to_error(f6i->fib6_type);
 		__entry->oif = flp->flowi6_oif;
 		__entry->iif = flp->flowi6_iif;
 		__entry->tos = ip6_tclass(flp->flowlabel);
@@ -48,10 +52,20 @@ TRACE_EVENT(fib6_table_lookup,
 		in6 = (struct in6_addr *)__entry->dst;
 		*in6 = flp->daddr;
 
+		__entry->proto = flp->flowi6_proto;
+		if (__entry->proto == IPPROTO_TCP ||
+		    __entry->proto == IPPROTO_UDP) {
+			__entry->sport = ntohs(flp->fl6_sport);
+			__entry->dport = ntohs(flp->fl6_dport);
+		} else {
+			__entry->sport = 0;
+			__entry->dport = 0;
+		}
+
 		if (f6i->fib6_nh.nh_dev) {
 			__assign_str(name, f6i->fib6_nh.nh_dev);
 		} else {
-			__assign_str(name, "");
+			__assign_str(name, "-");
 		}
 		if (f6i == net->ipv6.fib6_null_entry) {
 			struct in6_addr in6_zero = {};
@@ -65,10 +79,11 @@ TRACE_EVENT(fib6_table_lookup,
 		}
 	),
 
-	TP_printk("table %3u oif %d iif %d src %pI6c dst %pI6c tos %d scope %d flags %x ==> dev %s gw %pI6c",
-		  __entry->tb_id, __entry->oif, __entry->iif,
-		  __entry->src, __entry->dst, __entry->tos, __entry->scope,
-		  __entry->flags, __get_str(name), __entry->gw)
+	TP_printk("table %3u oif %d iif %d proto %u %pI6c/%u -> %pI6c/%u tos %d scope %d flags %x ==> dev %s gw %pI6c err %d",
+		  __entry->tb_id, __entry->oif, __entry->iif, __entry->proto,
+		  __entry->src, __entry->sport, __entry->dst, __entry->dport,
+		  __entry->tos, __entry->scope, __entry->flags,
+		  __get_str(name), __entry->gw, __entry->err)
 );
 
 #endif /* _TRACE_FIB6_H */
diff --git a/net/core/net-traces.c b/net/core/net-traces.c
index 380934580fa1..419af6dfe29f 100644
--- a/net/core/net-traces.c
+++ b/net/core/net-traces.c
@@ -35,10 +35,6 @@
 #include <trace/events/tcp.h>
 #include <trace/events/fib.h>
 #include <trace/events/qdisc.h>
-#if IS_ENABLED(CONFIG_IPV6)
-#include <trace/events/fib6.h>
-EXPORT_TRACEPOINT_SYMBOL_GPL(fib6_table_lookup);
-#endif
 #if IS_ENABLED(CONFIG_BRIDGE)
 #include <trace/events/bridge.h>
 EXPORT_TRACEPOINT_SYMBOL_GPL(br_fdb_add);
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index bcb8785c0451..8d9e460ff88b 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -63,14 +63,19 @@
 #include <net/lwtunnel.h>
 #include <net/ip_tunnels.h>
 #include <net/l3mdev.h>
-#include <trace/events/fib6.h>
-
 #include <linux/uaccess.h>
 
 #ifdef CONFIG_SYSCTL
 #include <linux/sysctl.h>
 #endif
 
+static int ip6_rt_type_to_error(u8 fib6_type);
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/fib6.h>
+EXPORT_TRACEPOINT_SYMBOL_GPL(fib6_table_lookup);
+#undef CREATE_TRACE_POINTS
+
 enum rt6_nud_state {
 	RT6_NUD_FAIL_HARD = -3,
 	RT6_NUD_FAIL_PROBE = -2,
-- 
2.11.0