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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: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Dmytro Linkin <dmitrolin@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
alistair/sunxi64-5.4-dsi
Vlad Buslov 2019-06-25 22:40:20 +03:00 committed by Saeed Mahameed
parent c786fe596b
commit 5970882a25
3 changed files with 65 additions and 0 deletions
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7
Documentation/networking/device_drivers/mellanox/mlx5.rst
View File

@ -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

54
drivers/net/ethernet/mellanox/mlx5/core/diag/en_rep_tracepoint.h 100644
View File

@ -0,0 +1,54 @@
/* 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>

4
drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
View File

@ -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;