You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
96 lines
3.5 KiB
96 lines
3.5 KiB
From 7160797e00796a359ba98a56918724238d8a9c81 Mon Sep 17 00:00:00 2001
|
|
From: Alaa Hleihel <ahleihel@redhat.com>
|
|
Date: Tue, 12 May 2020 10:54:58 -0400
|
|
Subject: [PATCH 186/312] [netdrv] net/mlx5: E-Switch, Hold mutex when querying
|
|
drop counter in legacy mode
|
|
|
|
Message-id: <20200512105530.4207-93-ahleihel@redhat.com>
|
|
Patchwork-id: 306964
|
|
Patchwork-instance: patchwork
|
|
O-Subject: [RHEL8.3 BZ 1789382 092/124] net/mlx5: E-Switch, Hold mutex when querying drop counter in legacy mode
|
|
Bugzilla: 1789382
|
|
RH-Acked-by: Tony Camuso <tcamuso@redhat.com>
|
|
RH-Acked-by: Kamal Heib <kheib@redhat.com>
|
|
RH-Acked-by: Jarod Wilson <jarod@redhat.com>
|
|
|
|
Bugzilla: http://bugzilla.redhat.com/1789382
|
|
Upstream: v5.7-rc1
|
|
|
|
commit 14c844cbf3503076de6e2e48d575216f1600b19f
|
|
Author: Bodong Wang <bodong@mellanox.com>
|
|
Date: Fri Sep 13 16:24:19 2019 -0500
|
|
|
|
net/mlx5: E-Switch, Hold mutex when querying drop counter in legacy mode
|
|
|
|
Consider scenario below, CPU 1 is at risk to query already destroyed
|
|
drop counters. Need to apply the same state mutex when disabling vport.
|
|
|
|
+-------------------------------+-------------------------------------+
|
|
| CPU 0 | CPU 1 |
|
|
+-------------------------------+-------------------------------------+
|
|
| mlx5_device_disable_sriov | mlx5e_get_vf_stats |
|
|
| mlx5_eswitch_disable | mlx5_eswitch_get_vport_stats |
|
|
| esw_disable_vport | mlx5_eswitch_query_vport_drop_stats |
|
|
| mlx5_fc_destroy(drop_counter) | mlx5_fc_query(drop_counter) |
|
|
+-------------------------------+-------------------------------------+
|
|
|
|
Fixes: b8a0dbe3a90b ("net/mlx5e: E-switch, Add steering drop counters")
|
|
Signed-off-by: Bodong Wang <bodong@mellanox.com>
|
|
Reviewed-by: Parav Pandit <parav@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>
|
|
---
|
|
drivers/net/ethernet/mellanox/mlx5/core/eswitch.c | 14 ++++++++++----
|
|
1 file changed, 10 insertions(+), 4 deletions(-)
|
|
|
|
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
|
|
index 2151787235e0..1541cdf877d2 100644
|
|
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
|
|
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
|
|
@@ -2600,9 +2600,13 @@ static int mlx5_eswitch_query_vport_drop_stats(struct mlx5_core_dev *dev,
|
|
u64 bytes = 0;
|
|
int err = 0;
|
|
|
|
- if (!vport->enabled || esw->mode != MLX5_ESWITCH_LEGACY)
|
|
+ if (esw->mode != MLX5_ESWITCH_LEGACY)
|
|
return 0;
|
|
|
|
+ mutex_lock(&esw->state_lock);
|
|
+ if (!vport->enabled)
|
|
+ goto unlock;
|
|
+
|
|
if (vport->egress.legacy.drop_counter)
|
|
mlx5_fc_query(dev, vport->egress.legacy.drop_counter,
|
|
&stats->rx_dropped, &bytes);
|
|
@@ -2613,20 +2617,22 @@ static int mlx5_eswitch_query_vport_drop_stats(struct mlx5_core_dev *dev,
|
|
|
|
if (!MLX5_CAP_GEN(dev, receive_discard_vport_down) &&
|
|
!MLX5_CAP_GEN(dev, transmit_discard_vport_down))
|
|
- return 0;
|
|
+ goto unlock;
|
|
|
|
err = mlx5_query_vport_down_stats(dev, vport->vport, 1,
|
|
&rx_discard_vport_down,
|
|
&tx_discard_vport_down);
|
|
if (err)
|
|
- return err;
|
|
+ goto unlock;
|
|
|
|
if (MLX5_CAP_GEN(dev, receive_discard_vport_down))
|
|
stats->rx_dropped += rx_discard_vport_down;
|
|
if (MLX5_CAP_GEN(dev, transmit_discard_vport_down))
|
|
stats->tx_dropped += tx_discard_vport_down;
|
|
|
|
- return 0;
|
|
+unlock:
|
|
+ mutex_unlock(&esw->state_lock);
|
|
+ return err;
|
|
}
|
|
|
|
int mlx5_eswitch_get_vport_stats(struct mlx5_eswitch *esw,
|
|
--
|
|
2.13.6
|
|
|