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net/mlx5: Bridge, expose FDB state via debugfs

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For debugging purposes expose offloaded FDB state (flags, counters, etc.)
via debugfs inside 'esw' root directory. Example debugfs file output:

$ cat mlx5/0000\:08\:00.0/esw/bridge/bridge1/fdb
DEV              MAC               VLAN              PACKETS                BYTES              LASTUSE FLAGS
enp8s0f0_1       e4:0a:05:08:00:06    2                    2                  204           4295567112   0x0
enp8s0f0_0       e4:0a:05:08:00:03    2                    3                  278           4295567112   0x0

Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Gal Pressman <gal@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Vlad Buslov 2023-05-25 15:19:00 +02:00 committed by Saeed Mahameed
parent ade19f0d6a
commit 791eb78285
5 changed files with 103 additions and 1 deletions
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3
drivers/net/ethernet/mellanox/mlx5/core/Makefile
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@ -75,7 +75,8 @@ mlx5_core-$(CONFIG_MLX5_ESWITCH) += esw/acl/helper.o \
esw/acl/egress_lgcy.o esw/acl/egress_ofld.o \
esw/acl/ingress_lgcy.o esw/acl/ingress_ofld.o
mlx5_core-$(CONFIG_MLX5_BRIDGE) += esw/bridge.o esw/bridge_mcast.o en/rep/bridge.o
mlx5_core-$(CONFIG_MLX5_BRIDGE) += esw/bridge.o esw/bridge_mcast.o esw/bridge_debugfs.o \
en/rep/bridge.o
mlx5_core-$(CONFIG_THERMAL) += thermal.o
mlx5_core-$(CONFIG_MLX5_MPFS) += lib/mpfs.o

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

@ -863,6 +863,7 @@ static struct mlx5_esw_bridge *mlx5_esw_bridge_create(struct net_device *br_netd
bridge->ageing_time = clock_t_to_jiffies(BR_DEFAULT_AGEING_TIME);
bridge->vlan_proto = ETH_P_8021Q;
list_add(&bridge->list, &br_offloads->bridges);
mlx5_esw_bridge_debugfs_init(br_netdev, bridge);
return bridge;
@ -886,6 +887,7 @@ static void mlx5_esw_bridge_put(struct mlx5_esw_bridge_offloads *br_offloads,
if (--bridge->refcnt)
return;
mlx5_esw_bridge_debugfs_cleanup(bridge);
mlx5_esw_bridge_egress_table_cleanup(bridge);
mlx5_esw_bridge_mcast_disable(bridge);
list_del(&bridge->list);
@ -1904,6 +1906,7 @@ struct mlx5_esw_bridge_offloads *mlx5_esw_bridge_init(struct mlx5_eswitch *esw)
xa_init(&br_offloads->ports);
br_offloads->esw = esw;
esw->br_offloads = br_offloads;
mlx5_esw_bridge_debugfs_offloads_init(br_offloads);
return br_offloads;
}
@ -1919,6 +1922,7 @@ void mlx5_esw_bridge_cleanup(struct mlx5_eswitch *esw)
mlx5_esw_bridge_flush(br_offloads);
WARN_ON(!xa_empty(&br_offloads->ports));
mlx5_esw_bridge_debugfs_offloads_cleanup(br_offloads);
esw->br_offloads = NULL;
kvfree(br_offloads);

2
drivers/net/ethernet/mellanox/mlx5/core/esw/bridge.h
View File

@ -10,6 +10,7 @@
#include <linux/xarray.h>
#include "eswitch.h"
struct dentry;
struct mlx5_flow_table;
struct mlx5_flow_group;
@ -17,6 +18,7 @@ struct mlx5_esw_bridge_offloads {
struct mlx5_eswitch *esw;
struct list_head bridges;
struct xarray ports;
struct dentry *debugfs_root;
struct notifier_block netdev_nb;
struct notifier_block nb_blk;

89
drivers/net/ethernet/mellanox/mlx5/core/esw/bridge_debugfs.c Normal file
View File

@ -0,0 +1,89 @@
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved. */
#include <linux/debugfs.h>
#include "bridge.h"
#include "bridge_priv.h"
static void *mlx5_esw_bridge_debugfs_start(struct seq_file *seq, loff_t *pos);
static void *mlx5_esw_bridge_debugfs_next(struct seq_file *seq, void *v, loff_t *pos);
static void mlx5_esw_bridge_debugfs_stop(struct seq_file *seq, void *v);
static int mlx5_esw_bridge_debugfs_show(struct seq_file *seq, void *v);
static const struct seq_operations mlx5_esw_bridge_debugfs_sops = {
.start = mlx5_esw_bridge_debugfs_start,
.next = mlx5_esw_bridge_debugfs_next,
.stop = mlx5_esw_bridge_debugfs_stop,
.show = mlx5_esw_bridge_debugfs_show,
};
DEFINE_SEQ_ATTRIBUTE(mlx5_esw_bridge_debugfs);
static void *mlx5_esw_bridge_debugfs_start(struct seq_file *seq, loff_t *pos)
{
struct mlx5_esw_bridge *bridge = seq->private;
rtnl_lock();
return *pos ? seq_list_start(&bridge->fdb_list, *pos - 1) : SEQ_START_TOKEN;
}
static void *mlx5_esw_bridge_debugfs_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct mlx5_esw_bridge *bridge = seq->private;
return seq_list_next(v == SEQ_START_TOKEN ? &bridge->fdb_list : v, &bridge->fdb_list, pos);
}
static void mlx5_esw_bridge_debugfs_stop(struct seq_file *seq, void *v)
{
rtnl_unlock();
}
static int mlx5_esw_bridge_debugfs_show(struct seq_file *seq, void *v)
{
struct mlx5_esw_bridge_fdb_entry *entry;
u64 packets, bytes, lastuse;
if (v == SEQ_START_TOKEN) {
seq_printf(seq, "%-16s %-17s %4s %20s %20s %20s %5s\n",
"DEV", "MAC", "VLAN", "PACKETS", "BYTES", "LASTUSE", "FLAGS");
return 0;
}
entry = list_entry(v, struct mlx5_esw_bridge_fdb_entry, list);
mlx5_fc_query_cached_raw(entry->ingress_counter, &bytes, &packets, &lastuse);
seq_printf(seq, "%-16s %-17pM %4d %20llu %20llu %20llu %#5x\n",
entry->dev->name, entry->key.addr, entry->key.vid, packets, bytes, lastuse,
entry->flags);
return 0;
}
void mlx5_esw_bridge_debugfs_init(struct net_device *br_netdev, struct mlx5_esw_bridge *bridge)
{
if (!bridge->br_offloads->debugfs_root)
return;
bridge->debugfs_dir = debugfs_create_dir(br_netdev->name,
bridge->br_offloads->debugfs_root);
debugfs_create_file("fdb", 0444, bridge->debugfs_dir, bridge,
&mlx5_esw_bridge_debugfs_fops);
}
void mlx5_esw_bridge_debugfs_cleanup(struct mlx5_esw_bridge *bridge)
{
debugfs_remove_recursive(bridge->debugfs_dir);
bridge->debugfs_dir = NULL;
}
void mlx5_esw_bridge_debugfs_offloads_init(struct mlx5_esw_bridge_offloads *br_offloads)
{
if (!br_offloads->esw->debugfs_root)
return;
br_offloads->debugfs_root = debugfs_create_dir("bridge", br_offloads->esw->debugfs_root);
}
void mlx5_esw_bridge_debugfs_offloads_cleanup(struct mlx5_esw_bridge_offloads *br_offloads)
{
debugfs_remove_recursive(br_offloads->debugfs_root);
br_offloads->debugfs_root = NULL;
}

6
drivers/net/ethernet/mellanox/mlx5/core/esw/bridge_priv.h
View File

@ -199,6 +199,7 @@ struct mlx5_esw_bridge {
int refcnt;
struct list_head list;
struct mlx5_esw_bridge_offloads *br_offloads;
struct dentry *debugfs_dir;
struct list_head fdb_list;
struct rhashtable fdb_ht;
@ -241,4 +242,9 @@ void mlx5_esw_bridge_port_mdb_vlan_flush(struct mlx5_esw_bridge_port *port,
struct mlx5_esw_bridge_vlan *vlan);
void mlx5_esw_bridge_mdb_flush(struct mlx5_esw_bridge *bridge);
void mlx5_esw_bridge_debugfs_offloads_init(struct mlx5_esw_bridge_offloads *br_offloads);
void mlx5_esw_bridge_debugfs_offloads_cleanup(struct mlx5_esw_bridge_offloads *br_offloads);
void mlx5_esw_bridge_debugfs_init(struct net_device *br_netdev, struct mlx5_esw_bridge *bridge);
void mlx5_esw_bridge_debugfs_cleanup(struct mlx5_esw_bridge *bridge);
#endif /* _MLX5_ESW_BRIDGE_PRIVATE_ */