From 94744255e69bab4bcd94627d5255f75bc71f09e0 Mon Sep 17 00:00:00 2001
From: Alaa Hleihel <ahleihel@redhat.com>
Date: Sun, 10 May 2020 14:52:06 -0400
Subject: [PATCH 040/312] [netdrv] net/mlx5e: Add trace point for neigh update

Message-id: <20200510145245.10054-44-ahleihel@redhat.com>
Patchwork-id: 306584
Patchwork-instance: patchwork
O-Subject: [RHEL8.3 BZ 1789378 v2 43/82] net/mlx5e: Add trace point for neigh update
Bugzilla: 1789378
RH-Acked-by: Kamal Heib <kheib@redhat.com>
RH-Acked-by: Jarod Wilson <jarod@redhat.com>
RH-Acked-by: Tony Camuso <tcamuso@redhat.com>
RH-Acked-by: Jonathan Toppins <jtoppins@redhat.com>

Bugzilla: http://bugzilla.redhat.com/1789378
Upstream: v5.4-rc1
Conflicts:
 - Documentation/networking/device_drivers/mellanox/mlx5.rst
   Drop changes to doc file that doesn't exist.

commit 5970882a2510e8bffaef518a82ea207798187a93
Author: Vlad Buslov <vladbu@mellanox.com>
Date:   Tue Jun 25 22:40:20 2019 +0300

    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>

Signed-off-by: Alaa Hleihel <ahleihel@redhat.com>
Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com>
---
 .../mellanox/mlx5/core/diag/en_rep_tracepoint.h    | 54 ++++++++++++++++++++++
 drivers/net/ethernet/mellanox/mlx5/core/en_rep.c   |  4 ++
 2 files changed, 58 insertions(+)
 create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/diag/en_rep_tracepoint.h

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/diag/en_rep_tracepoint.h b/drivers/net/ethernet/mellanox/mlx5/core/diag/en_rep_tracepoint.h
new file mode 100644
index 000000000000..1177860a2ee4
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/diag/en_rep_tracepoint.h
@@ -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>
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
index 66c8c2ace4b9..037983a8f149 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
@@ -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)
@@ -633,6 +635,8 @@ 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;
-- 
2.13.6