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net: IPv6 fib lookup tracepoint

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Add tracepoint to show fib6 table lookups and result.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern 2015-11-19 12:24:22 -08:00 • committed by David S. Miller
parent e2f9dc3bd2
commit b811580d91
3 changed files with 90 additions and 0 deletions
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10
net/ipv6/route.c
View file

@ -62,6 +62,7 @@
#include <net/lwtunnel.h>
#include <net/ip_tunnels.h>
#include <net/l3mdev.h>
#include <trace/events/fib6.h>
#include <asm/uaccess.h>
@ -865,6 +866,9 @@ restart:
}
dst_use(&rt->dst, jiffies);
read_unlock_bh(&table->tb6_lock);
trace_fib6_table_lookup(net, rt, table->tb6_id, fl6);
return rt;
}
@ -1078,6 +1082,8 @@ redo_rt6_select:
read_unlock_bh(&table->tb6_lock);
rt6_dst_from_metrics_check(rt);
trace_fib6_table_lookup(net, rt, table->tb6_id, fl6);
return rt;
} else if (unlikely((fl6->flowi6_flags & FLOWI_FLAG_KNOWN_NH) &&
!(rt->rt6i_flags & RTF_GATEWAY))) {
@ -1101,6 +1107,8 @@ redo_rt6_select:
uncached_rt = net->ipv6.ip6_null_entry;
dst_hold(&uncached_rt->dst);
trace_fib6_table_lookup(net, uncached_rt, table->tb6_id, fl6);
return uncached_rt;
} else {
@ -1125,6 +1133,7 @@ redo_rt6_select:
dst_release(&rt->dst);
}
trace_fib6_table_lookup(net, pcpu_rt, table->tb6_id, fl6);
return pcpu_rt;
}
@ -1474,6 +1483,7 @@ out:
read_unlock_bh(&table->tb6_lock);
trace_fib6_table_lookup(net, rt, table->tb6_id, fl6);
return rt;
};