From f6d3c19274c74ff17174df8078e0a14df003667f Mon Sep 17 00:00:00 2001 From: David Ahern Date: Fri, 28 Aug 2015 08:42:09 -0700 Subject: net: FIB tracepoints A few useful tracepoints developing VRF driver. Signed-off-by: David Ahern Signed-off-by: David S. Miller --- include/trace/events/fib.h | 111 +++++++++++++++++++++++++++++++++++++++++++++ net/core/net-traces.c | 1 + net/ipv4/fib_frontend.c | 3 ++ net/ipv4/fib_trie.c | 5 ++ 4 files changed, 120 insertions(+) create mode 100644 include/trace/events/fib.h diff --git a/include/trace/events/fib.h b/include/trace/events/fib.h new file mode 100644 index 000000000000..4030f75410d7 --- /dev/null +++ b/include/trace/events/fib.h @@ -0,0 +1,111 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM fib + +#if !defined(_TRACE_FIB_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_FIB_H + +#include +#include +#include +#include + +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 diff --git a/net/core/net-traces.c b/net/core/net-traces.c index ba3c0120786c..adef015b2f41 100644 --- a/net/core/net-traces.c +++ b/net/core/net-traces.c @@ -31,6 +31,7 @@ #include #include #include +#include EXPORT_TRACEPOINT_SYMBOL_GPL(kfree_skb); diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index 7fa277176c33..4036c94dfbe1 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c @@ -46,6 +46,7 @@ #include #include #include +#include #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; diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c index 5154f81c5326..26d6ffb6d23c 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -81,6 +81,7 @@ #include #include #include +#include #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 @@ found: #ifdef CONFIG_IP_FIB_TRIE_STATS this_cpu_inc(stats->semantic_match_passed); #endif + trace_fib_table_lookup_nh(nh); + return err; } } -- cgit v1.2.3-59-g8ed1b