History

net: FIB tracepoints

A few useful tracepoints developing VRF driver.

David Ahern committed 11 years ago

Commit f6d3c191 parent 0d5cdef4 files · +120 −0Browse files

Unified · Split

4 files
  1. include/trace/events/fib.h +111 −0
  2. net/core/net-traces.c +1 −0
  3. net/ipv4/fib_frontend.c +3 −0
  4. net/ipv4/fib_trie.c +5 −0
include/trace/events/fib.h+111−0
@@ -0,0 +1,111 @@
1#undef TRACE_SYSTEM
2#define TRACE_SYSTEM fib
3
4#if !defined(_TRACE_FIB_H) || defined(TRACE_HEADER_MULTI_READ)
5#define _TRACE_FIB_H
6
7#include <linux/skbuff.h>
8#include <linux/netdevice.h>
9#include <net/ip_fib.h>
10#include <linux/tracepoint.h>
11
12TRACE_EVENT(fib_table_lookup,
13
14 TP_PROTO(int tb_id, const struct flowi4 *flp),
15
16 TP_ARGS(tb_id, flp),
17
18 TP_STRUCT__entry(
19 __field( int, tb_id )
20 __field( int, oif )
21 __field( int, iif )
22 __field( __u8, tos )
23 __field( __u8, scope )
24 __field( __u8, flags )
25 __array( __u8, src, 4 )
26 __array( __u8, dst, 4 )
27 ),
28
29 TP_fast_assign(
30 __be32 *p32;
31
32 __entry->tb_id = tb_id;
33 __entry->oif = flp->flowi4_oif;
34 __entry->iif = flp->flowi4_iif;
35 __entry->tos = flp->flowi4_tos;
36 __entry->scope = flp->flowi4_scope;
37 __entry->flags = flp->flowi4_flags;
38
39 p32 = (__be32 *) __entry->src;
40 *p32 = flp->saddr;
41
42 p32 = (__be32 *) __entry->dst;
43 *p32 = flp->daddr;
44 ),
45
46 TP_printk("table %d oif %d iif %d src %pI4 dst %pI4 tos %d scope %d flags %x",
47 __entry->tb_id, __entry->oif, __entry->iif,
48 __entry->src, __entry->dst, __entry->tos, __entry->scope,
49 __entry->flags)
50);
51
52TRACE_EVENT(fib_table_lookup_nh,
53
54 TP_PROTO(const struct fib_nh *nh),
55
56 TP_ARGS(nh),
57
58 TP_STRUCT__entry(
59 __string( name, nh->nh_dev->name)
60 __field( int, oif )
61 __array( __u8, src, 4 )
62 ),
63
64 TP_fast_assign(
65 __be32 *p32 = (__be32 *) __entry->src;
66
67 __assign_str(name, nh->nh_dev ? nh->nh_dev->name : "not set");
68 __entry->oif = nh->nh_oif;
69 *p32 = nh->nh_saddr;
70 ),
71
72 TP_printk("nexthop dev %s oif %d src %pI4",
73 __get_str(name), __entry->oif, __entry->src)
74);
75
76TRACE_EVENT(fib_validate_source,
77
78 TP_PROTO(const struct net_device *dev, const struct flowi4 *flp),
79
80 TP_ARGS(dev, flp),
81
82 TP_STRUCT__entry(
83 __string( name, dev->name )
84 __field( int, oif )
85 __field( int, iif )
86 __array( __u8, src, 4 )
87 __array( __u8, dst, 4 )
88 ),
89
90 TP_fast_assign(
91 __be32 *p32;
92
93 __assign_str(name, dev ? dev->name : "not set");
94 __entry->oif = flp->flowi4_oif;
95 __entry->iif = flp->flowi4_iif;
96
97 p32 = (__be32 *) __entry->src;
98 *p32 = flp->saddr;
99
100 p32 = (__be32 *) __entry->dst;
101 *p32 = flp->daddr;
102 ),
103
104 TP_printk("dev %s oif %d iif %d src %pI4 dst %pI4",
105 __get_str(name), __entry->oif, __entry->iif,
106 __entry->src, __entry->dst)
107);
108#endif /* _TRACE_FIB_H */
109
110/* This part must be outside protection */
111#include <trace/define_trace.h>
net/core/net-traces.c+1−0
@@ -31,6 +31,7 @@ · 30 unmodified lines
31#include <trace/events/napi.h>31#include <trace/events/napi.h>
32#include <trace/events/sock.h>32#include <trace/events/sock.h>
33#include <trace/events/udp.h>33#include <trace/events/udp.h>
34#include <trace/events/fib.h>
34 35
35EXPORT_TRACEPOINT_SYMBOL_GPL(kfree_skb);36EXPORT_TRACEPOINT_SYMBOL_GPL(kfree_skb);
36 37
net/ipv4/fib_frontend.c+3−0
@@ -46,6 +46,7 @@ · 45 unmodified lines
46#include <net/rtnetlink.h>46#include <net/rtnetlink.h>
47#include <net/xfrm.h>47#include <net/xfrm.h>
48#include <net/vrf.h>48#include <net/vrf.h>
49#include <trace/events/fib.h>
49 50
50#ifndef CONFIG_IP_MULTIPLE_TABLES51#ifndef CONFIG_IP_MULTIPLE_TABLES
51 52
@@ -344,6 +345,8 @@ static int __fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst, · 292 unmodified lines
344 345
345 fl4.flowi4_mark = IN_DEV_SRC_VMARK(idev) ? skb->mark : 0;346 fl4.flowi4_mark = IN_DEV_SRC_VMARK(idev) ? skb->mark : 0;
346 347
348 trace_fib_validate_source(dev, &fl4);
349
347 net = dev_net(dev);350 net = dev_net(dev);
348 if (fib_lookup(net, &fl4, &res, 0))351 if (fib_lookup(net, &fl4, &res, 0))
349 goto last_resort;352 goto last_resort;
net/ipv4/fib_trie.c+5−0
@@ -81,6 +81,7 @@ · 80 unmodified lines
81#include <net/sock.h>81#include <net/sock.h>
82#include <net/ip_fib.h>82#include <net/ip_fib.h>
83#include <net/switchdev.h>83#include <net/switchdev.h>
84#include <trace/events/fib.h>
84#include "fib_lookup.h"85#include "fib_lookup.h"
85 86
86#define MAX_STAT_DEPTH 3287#define MAX_STAT_DEPTH 32
@@ -1278,6 +1279,8 @@ int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp, · 1191 unmodified lines
1278 unsigned long index;1279 unsigned long index;
1279 t_key cindex;1280 t_key cindex;
1280 1281
1282 trace_fib_table_lookup(tb->tb_id, flp);
1283
1281 pn = t->kv;1284 pn = t->kv;
1282 cindex = 0;1285 cindex = 0;
1283 1286
@@ -1442,6 +1445,8 @@ found: · 158 unmodified lines
1442#ifdef CONFIG_IP_FIB_TRIE_STATS1445#ifdef CONFIG_IP_FIB_TRIE_STATS
1443 this_cpu_inc(stats->semantic_match_passed);1446 this_cpu_inc(stats->semantic_match_passed);
1444#endif1447#endif
1448 trace_fib_table_lookup_nh(nh);
1449
1445 return err;1450 return err;
1446 }1451 }
1447 }1452 }