From: Vlad Buslov <vla...@mellanox.com>
Allow tracing result of neigh used value update task that is executed
periodically on workqueue.
Usage example:
># cd /sys/kernel/debug/tracing
># echo mlx5:mlx5e_tc_update_neigh_used_value >> set_event
># cat trace
...
kworker/u48:4-8806 [009] ...1 55117.882428:
mlx5e_tc_update_neigh_used_value:
netdev: ens1f0 IPv4: 1.1.1.10 IPv6: ::ffff:1.1.1.10 neigh_used=1
Added corresponding documentation in
Documentation/networking/device-driver/mellanox/mlx5.rst
Signed-off-by: Vlad Buslov <vla...@mellanox.com>
Reviewed-by: Dmytro Linkin <dmitro...@mellanox.com>
Signed-off-by: Saeed Mahameed <sae...@mellanox.com>
---
.../device_drivers/mellanox/mlx5.rst | 7 +++++
.../mlx5/core/diag/en_tc_tracepoint.h | 31 +++++++++++++++++++
.../net/ethernet/mellanox/mlx5/core/en_tc.c | 2 ++
3 files changed, 40 insertions(+)
diff --git a/Documentation/networking/device_drivers/mellanox/mlx5.rst
b/Documentation/networking/device_drivers/mellanox/mlx5.rst
index 1339dbf52431..b2f21ce9b090 100644
--- a/Documentation/networking/device_drivers/mellanox/mlx5.rst
+++ b/Documentation/networking/device_drivers/mellanox/mlx5.rst
@@ -251,3 +251,10 @@ tc and eswitch offloads tracepoints:
$ cat /sys/kernel/debug/tracing/trace
...
tc-6546 [010] ...1 2679.704889: mlx5e_stats_flower:
cookie=0000000060eb3d6a bytes=0 packets=0 lastused=4295560217
+
+- mlx5e_tc_update_neigh_used_value: trace tunnel rule neigh update value
offloaded to mlx5::
+
+ $ echo mlx5:mlx5e_tc_update_neigh_used_value >>
/sys/kernel/debug/tracing/set_event
+ $ cat /sys/kernel/debug/tracing/trace
+ ...
+ kworker/u48:4-8806 [009] ...1 55117.882428:
mlx5e_tc_update_neigh_used_value: netdev: ens1f0 IPv4: 1.1.1.10 IPv6:
::ffff:1.1.1.10 neigh_used=1
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/diag/en_tc_tracepoint.h
b/drivers/net/ethernet/mellanox/mlx5/core/diag/en_tc_tracepoint.h
index a362100fe6d3..d4e6cfaaade3 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/diag/en_tc_tracepoint.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/diag/en_tc_tracepoint.h
@@ -10,6 +10,7 @@
#include <linux/tracepoint.h>
#include <linux/trace_seq.h>
#include <net/flow_offload.h>
+#include "en_rep.h"
#define __parse_action(ids, num) parse_action(p, ids, num)
@@ -73,6 +74,36 @@ TRACE_EVENT(mlx5e_stats_flower,
)
);
+TRACE_EVENT(mlx5e_tc_update_neigh_used_value,
+ TP_PROTO(const struct mlx5e_neigh_hash_entry *nhe, bool neigh_used),
+ TP_ARGS(nhe, neigh_used),
+ TP_STRUCT__entry(__string(devname, nhe->m_neigh.dev->name)
+ __array(u8, v4, 4)
+ __array(u8, v6, 16)
+ __field(bool, neigh_used)
+ ),
+ TP_fast_assign(const struct mlx5e_neigh *mn = &nhe->m_neigh;
+ struct in6_addr *pin6;
+ __be32 *p32;
+
+ __assign_str(devname, mn->dev->name);
+ __entry->neigh_used = neigh_used;
+
+ p32 = (__be32 *)__entry->v4;
+ pin6 = (struct in6_addr *)__entry->v6;
+ if (mn->family == AF_INET) {
+ *p32 = mn->dst_ip.v4;
+ ipv6_addr_set_v4mapped(*p32, pin6);
+ } else if (mn->family == AF_INET6) {
+ *pin6 = mn->dst_ip.v6;
+ }
+ ),
+ TP_printk("netdev: %s IPv4: %pI4 IPv6: %pI6c neigh_used=%d\n",
+ __get_str(devname), __entry->v4, __entry->v6,
+ __entry->neigh_used
+ )
+);
+
#endif /* _MLX5_TC_TP_ */
/* This part must be outside protection */
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index c40cca08c8cc..5581a8045ede 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -1536,6 +1536,8 @@ void mlx5e_tc_update_neigh_used_value(struct
mlx5e_neigh_hash_entry *nhe)
}
}
+ trace_mlx5e_tc_update_neigh_used_value(nhe, neigh_used);
+
if (neigh_used) {
nhe->reported_lastuse = jiffies;
--
2.21.0
