[PATCH net-next 1/3] ipv6: Report netns cookie in fib6_table_lookup tracepoint

[Ido Schimmel <idosch@nvidia.com>]

The first argument of the tracepoint is a pointer to the network
namespace in which the FIB lookup was performed, but the tracepoint does
not report information about it in the associated trace record, making
it impossible to tell apart lookups performed in different namespaces.

Report the network namespace cookie, as commit 27cb3de7f43a ("net: add
net cookie for net device trace events") did for the net device
tracepoints.

Assisted-by: LLM
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
---
 include/trace/events/fib6.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/include/trace/events/fib6.h b/include/trace/events/fib6.h
index 8d22b2e98d48..e58facd2d7d4 100644
--- a/include/trace/events/fib6.h
+++ b/include/trace/events/fib6.h
@@ -34,6 +34,7 @@ TRACE_EVENT(fib6_table_lookup,
 		__field(        u8,	rt_type		)
 		__array(		char,	name,	IFNAMSIZ )
 		__array(		__u8,	gw,	16	 )
+		__field(	u64,	net_cookie	)
 	),
 
 	TP_fast_assign(
@@ -76,13 +77,16 @@ TRACE_EVENT(fib6_table_lookup,
 			in6 = (struct in6_addr *)__entry->gw;
 			*in6 = res->nh->fib_nh_gw6;
 		}
+
+		__entry->net_cookie = net->net_cookie;
 	),
 
-	TP_printk("table %3u oif %d iif %d proto %u %pI6c/%u -> %pI6c/%u flowlabel %#x tos %d scope %d flags %x ==> dev %s gw %pI6c err %d",
+	TP_printk("table %3u oif %d iif %d proto %u %pI6c/%u -> %pI6c/%u flowlabel %#x tos %d scope %d flags %x ==> dev %s gw %pI6c err %d net_cookie %llu",
 		  __entry->tb_id, __entry->oif, __entry->iif, __entry->proto,
 		  __entry->src, __entry->sport, __entry->dst, __entry->dport,
 		  __entry->flowlabel, __entry->tos, __entry->scope,
-		  __entry->flags, __entry->name, __entry->gw, __entry->err)
+		  __entry->flags, __entry->name, __entry->gw, __entry->err,
+		  __entry->net_cookie)
 );
 
 #endif /* _TRACE_FIB6_H */
-- 
2.55.0