[PATCH net-next 3/3] ipv4: Report netns cookie in fib_table_lookup tracepoint

[Ido Schimmel <idosch@nvidia.com>]

The fib_table_lookup tracepoint does not report the network namespace in
which the lookup was performed, making it impossible to tell apart
lookups performed in different namespaces.

Report the network namespace cookie now that the namespace is passed to
the tracepoint.

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

diff --git a/include/trace/events/fib.h b/include/trace/events/fib.h
index 9a88060aa92e..7852e9ba3861 100644
--- a/include/trace/events/fib.h
+++ b/include/trace/events/fib.h
@@ -35,6 +35,7 @@ TRACE_EVENT(fib_table_lookup,
 		__field(	u16,	sport		)
 		__field(	u16,	dport		)
 		__array(char,  name,   IFNAMSIZ )
+		__field(	u64,	net_cookie	)
 	),
 
 	TP_fast_assign(
@@ -90,13 +91,16 @@ TRACE_EVENT(fib_table_lookup,
 			in6 = (struct in6_addr *)__entry->gw6;
 			*in6 = in6addr_any;
 		}
+
+		__entry->net_cookie = net->net_cookie;
 	),
 
-	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",
+	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 net_cookie %llu",
 		  __entry->tb_id, __entry->oif, __entry->iif, __entry->proto,
 		  __entry->src, __entry->sport, __entry->dst, __entry->dport,
 		  __entry->tos, __entry->scope, __entry->flags,
-		  __entry->name, __entry->gw4, __entry->gw6, __entry->err)
+		  __entry->name, __entry->gw4, __entry->gw6, __entry->err,
+		  __entry->net_cookie)
 );
 #endif /* _TRACE_FIB_H */
 
-- 
2.55.0