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Commit f6d3c192 authored by David Ahern's avatar David Ahern Committed by David S. Miller
Browse files

net: FIB tracepoints 



A few useful tracepoints developing VRF driver.

Signed-off-by: default avatarDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0d5cdef8

include/trace/events/fib.h

0 → 100644
+111 −0
Original line number Diff line number Diff line 
#undef TRACE_SYSTEM

#define TRACE_SYSTEM fib



#if !defined(_TRACE_FIB_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_FIB_H



#include <linux/skbuff.h>

#include <linux/netdevice.h>

#include <net/ip_fib.h>

#include <linux/tracepoint.h>



TRACE_EVENT(fib_table_lookup,



	TP_PROTO(int tb_id, const struct flowi4 *flp),



	TP_ARGS(tb_id, flp),



	TP_STRUCT__entry(

		__field(	int,	tb_id		)

		__field(	int,	oif		)

		__field(	int,	iif		)

		__field(	__u8,	tos		)

		__field(	__u8,	scope		)

		__field(	__u8,	flags		)

		__array(	__u8,	src,	4	)

		__array(	__u8,	dst,	4	)

	),



	TP_fast_assign(

		__be32 *p32;



		__entry->tb_id = tb_id;

		__entry->oif = flp->flowi4_oif;

		__entry->iif = flp->flowi4_iif;

		__entry->tos = flp->flowi4_tos;

		__entry->scope = flp->flowi4_scope;

		__entry->flags = flp->flowi4_flags;



		p32 = (__be32 *) __entry->src;

		*p32 = flp->saddr;



		p32 = (__be32 *) __entry->dst;

		*p32 = flp->daddr;

	),



	TP_printk("table %d oif %d iif %d src %pI4 dst %pI4 tos %d scope %d flags %x",

		  __entry->tb_id, __entry->oif, __entry->iif,

		  __entry->src, __entry->dst, __entry->tos, __entry->scope,

		  __entry->flags)

);



TRACE_EVENT(fib_table_lookup_nh,



	TP_PROTO(const struct fib_nh *nh),



	TP_ARGS(nh),



	TP_STRUCT__entry(

		__string(	name,	nh->nh_dev->name)

		__field(	int,	oif		)

		__array(	__u8,	src,	4	)

	),



	TP_fast_assign(

		__be32 *p32 = (__be32 *) __entry->src;



		__assign_str(name, nh->nh_dev ? nh->nh_dev->name : "not set");

		__entry->oif = nh->nh_oif;

		*p32 = nh->nh_saddr;

	),



	TP_printk("nexthop dev %s oif %d src %pI4",

		  __get_str(name), __entry->oif, __entry->src)

);



TRACE_EVENT(fib_validate_source,



	TP_PROTO(const struct net_device *dev, const struct flowi4 *flp),



	TP_ARGS(dev, flp),



	TP_STRUCT__entry(

		__string(	name,	dev->name	)

		__field(	int,	oif		)

		__field(	int,	iif		)

		__array(	__u8,	src,	4	)

		__array(	__u8,	dst,	4	)

	),



	TP_fast_assign(

		__be32 *p32;



		__assign_str(name, dev ? dev->name : "not set");

		__entry->oif = flp->flowi4_oif;

		__entry->iif = flp->flowi4_iif;



		p32 = (__be32 *) __entry->src;

		*p32 = flp->saddr;



		p32 = (__be32 *) __entry->dst;

		*p32 = flp->daddr;

	),



	TP_printk("dev %s oif %d iif %d src %pI4 dst %pI4",

		  __get_str(name), __entry->oif, __entry->iif,

		  __entry->src, __entry->dst)

);

#endif /* _TRACE_FIB_H */



/* This part must be outside protection */

#include <trace/define_trace.h>

net/core/net-traces.c

+1 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 
#include <trace/events/napi.h>

#include <trace/events/sock.h>

#include <trace/events/udp.h>

#include <trace/events/fib.h>



EXPORT_TRACEPOINT_SYMBOL_GPL(kfree_skb);

net/ipv4/fib_frontend.c

+3 −0
Original line number Diff line number Diff line
@@ -46,6 +46,7 @@ 
#include <net/rtnetlink.h>

#include <net/xfrm.h>

#include <net/vrf.h>

#include <trace/events/fib.h>



#ifndef CONFIG_IP_MULTIPLE_TABLES
@@ -344,6 +345,8 @@ static int __fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst, 


	fl4.flowi4_mark = IN_DEV_SRC_VMARK(idev) ? skb->mark : 0;



	trace_fib_validate_source(dev, &fl4);



	net = dev_net(dev);

	if (fib_lookup(net, &fl4, &res, 0))

		goto last_resort;

net/ipv4/fib_trie.c

+5 −0
Original line number Diff line number Diff line
@@ -81,6 +81,7 @@ 
#include <net/sock.h>

#include <net/ip_fib.h>

#include <net/switchdev.h>

#include <trace/events/fib.h>

#include "fib_lookup.h"



#define MAX_STAT_DEPTH 32
@@ -1278,6 +1279,8 @@ int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp, 
	unsigned long index;

	t_key cindex;



	trace_fib_table_lookup(tb->tb_id, flp);



	pn = t->kv;

	cindex = 0;
@@ -1442,6 +1445,8 @@ int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp, 
#ifdef CONFIG_IP_FIB_TRIE_STATS

			this_cpu_inc(stats->semantic_match_passed);

#endif

			trace_fib_table_lookup_nh(nh);



			return err;

		}

	}