Commit c786fe59 authored by Vlad Buslov's avatar Vlad Buslov Committed by Saeed Mahameed
Browse files

net/mlx5e: Add trace point for neigh used value update 



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: default avatarVlad Buslov <vladbu@mellanox.com>
Reviewed-by: default avatarDmytro Linkin <dmitrolin@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
parent 7a978759

Documentation/networking/device_drivers/mellanox/mlx5.rst

+7 −0
Original line number Diff line number Diff line
@@ -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

drivers/net/ethernet/mellanox/mlx5/core/diag/en_tc_tracepoint.h

+31 −0
Original line number Diff line number Diff line
@@ -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 */

drivers/net/ethernet/mellanox/mlx5/core/en_tc.c

+2 −0
Original line number Diff line number Diff line
@@ -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;

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