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ipv4: Update fib_table_lookup tracepoint to take common nexthop
Update fib_table_lookup tracepoint to take a fib_nh_common struct and dump the v6 gateway address if the nexthop uses it. Over the years saddr has not proven useful and the output of the tracepoint produces very long lines. Since saddr is not part of fib_nh_common, drop it. If it needs to be added later, fib_nh which contains saddr can be obtained from a fib_nh_common via container_of. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -13,9 +13,9 @@
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TRACE_EVENT(fib_table_lookup,
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TP_PROTO(u32 tb_id, const struct flowi4 *flp,
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const struct fib_nh *nh, int err),
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const struct fib_nh_common *nhc, int err),
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TP_ARGS(tb_id, flp, nh, err),
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TP_ARGS(tb_id, flp, nhc, err),
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TP_STRUCT__entry(
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__field( u32, tb_id )
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@ -28,14 +28,17 @@ TRACE_EVENT(fib_table_lookup,
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__field( __u8, flags )
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__array( __u8, src, 4 )
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__array( __u8, dst, 4 )
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__array( __u8, gw, 4 )
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__array( __u8, saddr, 4 )
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__array( __u8, gw4, 4 )
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__array( __u8, gw6, 16 )
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__field( u16, sport )
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__field( u16, dport )
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__dynamic_array(char, name, IFNAMSIZ )
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),
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TP_fast_assign(
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struct in6_addr in6_zero = {};
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struct net_device *dev;
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struct in6_addr *in6;
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__be32 *p32;
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__entry->tb_id = tb_id;
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@ -62,33 +65,37 @@ TRACE_EVENT(fib_table_lookup,
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__entry->dport = 0;
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}
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if (nh) {
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struct net_device *dev;
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dev = nhc ? nhc->nhc_dev : NULL;
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__assign_str(name, dev ? dev->name : "-");
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p32 = (__be32 *) __entry->saddr;
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*p32 = nh->nh_saddr;
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if (nhc) {
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if (nhc->nhc_family == AF_INET) {
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p32 = (__be32 *) __entry->gw4;
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*p32 = nhc->nhc_gw.ipv4;
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p32 = (__be32 *) __entry->gw;
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*p32 = nh->fib_nh_gw4;
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in6 = (struct in6_addr *)__entry->gw6;
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*in6 = in6_zero;
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} else if (nhc->nhc_family == AF_INET6) {
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p32 = (__be32 *) __entry->gw4;
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*p32 = 0;
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dev = nh->fib_nh_dev;
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__assign_str(name, dev ? dev->name : "-");
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in6 = (struct in6_addr *)__entry->gw6;
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*in6 = nhc->nhc_gw.ipv6;
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}
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} else {
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p32 = (__be32 *) __entry->saddr;
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p32 = (__be32 *) __entry->gw4;
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*p32 = 0;
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p32 = (__be32 *) __entry->gw;
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*p32 = 0;
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__assign_str(name, "-");
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in6 = (struct in6_addr *)__entry->gw6;
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*in6 = in6_zero;
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}
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),
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TP_printk("table %u oif %d iif %d proto %u %pI4/%u -> %pI4/%u tos %d scope %d flags %x ==> dev %s gw %pI4 src %pI4 err %d",
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TP_printk("table %u oif %d iif %d proto %u %pI4/%u -> %pI4/%u tos %d scope %d flags %x ==> dev %s gw %pI4/%pI6c err %d",
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__entry->tb_id, __entry->oif, __entry->iif, __entry->proto,
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__entry->src, __entry->sport, __entry->dst, __entry->dport,
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__entry->tos, __entry->scope, __entry->flags,
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__get_str(name), __entry->gw, __entry->saddr, __entry->err)
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__get_str(name), __entry->gw4, __entry->gw6, __entry->err)
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);
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#endif /* _TRACE_FIB_H */
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@ -1498,7 +1498,7 @@ found:
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#ifdef CONFIG_IP_FIB_TRIE_STATS
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this_cpu_inc(stats->semantic_match_passed);
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#endif
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trace_fib_table_lookup(tb->tb_id, flp, nh, err);
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trace_fib_table_lookup(tb->tb_id, flp, &nh->nh_common, err);
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return err;
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}
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