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Commit 5970882a authored by Vlad Buslov's avatar Vlad Buslov Committed by Saeed Mahameed
Browse files

net/mlx5e: Add trace point for neigh update 



Allow tracing neigh state during neigh update task that is executed on
workqueue and is scheduled by neigh state change event.

Usage example:
 ># cd /sys/kernel/debug/tracing
 ># echo mlx5:mlx5e_rep_neigh_update >> set_event
 ># cat trace
    ...
    kworker/u48:7-2221  [009] ...1  1475.387435: mlx5e_rep_neigh_update:
netdev: ens1f0 MAC: 24:8a:07:9a:17:9a IPv4: 1.1.1.10 IPv6: ::ffff:1.1.1.10 neigh_connected=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 c786fe59

Documentation/networking/device_drivers/mellanox/mlx5.rst

+7 −0
Original line number Diff line number Diff line
@@ -258,3 +258,10 @@ tc and eswitch offloads tracepoints: 
    $ 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



- mlx5e_rep_neigh_update: trace neigh update tasks scheduled due to neigh state change events::



    $ echo mlx5:mlx5e_rep_neigh_update >> /sys/kernel/debug/tracing/set_event

    $ cat /sys/kernel/debug/tracing/trace

    ...

    kworker/u48:7-2221  [009] ...1  1475.387435: mlx5e_rep_neigh_update: netdev: ens1f0 MAC: 24:8a:07:9a:17:9a IPv4: 1.1.1.10 IPv6: ::ffff:1.1.1.10 neigh_connected=1

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

0 → 100644
+54 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */

/* Copyright (c) 2019 Mellanox Technologies. */



#undef TRACE_SYSTEM

#define TRACE_SYSTEM mlx5



#if !defined(_MLX5_EN_REP_TP_) || defined(TRACE_HEADER_MULTI_READ)

#define _MLX5_EN_REP_TP_



#include <linux/tracepoint.h>

#include <linux/trace_seq.h>

#include "en_rep.h"



TRACE_EVENT(mlx5e_rep_neigh_update,

	    TP_PROTO(const struct mlx5e_neigh_hash_entry *nhe, const u8 *ha,

		     bool neigh_connected),

	    TP_ARGS(nhe, ha, neigh_connected),

	    TP_STRUCT__entry(__string(devname, nhe->m_neigh.dev->name)

			     __array(u8, ha, ETH_ALEN)

			     __array(u8, v4, 4)

			     __array(u8, v6, 16)

			     __field(bool, neigh_connected)

			     ),

	    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_connected = neigh_connected;

			memcpy(__entry->ha, ha, ETH_ALEN);



			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 MAC: %pM IPv4: %pI4 IPv6: %pI6c neigh_connected=%d\n",

		      __get_str(devname), __entry->ha,

		      __entry->v4, __entry->v6, __entry->neigh_connected

		      )

);



#endif /* _MLX5_EN_REP_TP_ */



/* This part must be outside protection */

#undef TRACE_INCLUDE_PATH

#define TRACE_INCLUDE_PATH ./diag

#undef TRACE_INCLUDE_FILE

#define TRACE_INCLUDE_FILE en_rep_tracepoint

#include <trace/define_trace.h>

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

+4 −0
Original line number Diff line number Diff line
@@ -46,6 +46,8 @@ 
#include "en/tc_tun.h"

#include "fs_core.h"

#include "lib/port_tun.h"

#define CREATE_TRACE_POINTS

#include "diag/en_rep_tracepoint.h"



#define MLX5E_REP_PARAMS_DEF_LOG_SQ_SIZE \

        max(0x7, MLX5E_PARAMS_MINIMUM_LOG_SQ_SIZE)
@@ -657,6 +659,8 @@ static void mlx5e_rep_neigh_update(struct work_struct *work) 


	neigh_connected = (nud_state & NUD_VALID) && !dead;



	trace_mlx5e_rep_neigh_update(nhe, ha, neigh_connected);



	list_for_each_entry(e, &nhe->encap_list, encap_list) {

		if (!mlx5e_encap_take(e))

			continue;