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| author |   Dima Chumak <dchumak@nvidia.com> | 2021-06-30 14:56:32 +0300 |
|---|---|---|
| committer |   Saeed Mahameed <saeedm@nvidia.com> | 2021-08-26 15:15:41 -0700 |
| commit | 2f8b6161cca5fb34b0065e2eac8bb2b61b7bfe87 (patch) | |
| tree | 1b1f2f81d80e9480a5d3b4db1af917bc818436b3 | |
| parent | Merge tag 'nfsd-5.14-1' of git://linux-nfs.org/~bfields/linux (diff) | |
| download | linux-dev-2f8b6161cca5fb34b0065e2eac8bb2b61b7bfe87.tar.xz linux-dev-2f8b6161cca5fb34b0065e2eac8bb2b61b7bfe87.zip | |
net/mlx5: Lag, fix multipath lag activation
When handling FIB_EVENT_ENTRY_REPLACE event for a new multipath route,
lag activation can be missed if a stale (struct lag_mp)->mfi pointer
exists, which was associated with an older multipath route that had been
removed.
Normally, when a route is removed, it triggers mlx5_lag_fib_event(),
which handles FIB_EVENT_ENTRY_DEL and clears mfi pointer. But, if
mlx5_lag_check_prereq() condition isn't met, for example when eswitch is
in legacy mode, the fib event is skipped and mfi pointer becomes stale.
Fix by resetting mfi pointer to NULL in mlx5_deactivate_lag().
Fixes: 8a66e4585979 ("net/mlx5: Change ownership model for lag")
Signed-off-by: Dima Chumak <dchumak@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/lag.c | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/lag_mp.c | 8 | ||||
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/lag_mp.h | 2 |
3 files changed, 11 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag.c b/drivers/net/ethernet/mellanox/mlx5/core/lag.c index 5c043c5cc403..40ef60f562b4 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/lag.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/lag.c @@ -277,6 +277,7 @@ static int mlx5_deactivate_lag(struct mlx5_lag *ldev) int err; ldev->flags &= ~MLX5_LAG_MODE_FLAGS; + mlx5_lag_mp_reset(ldev); MLX5_SET(destroy_lag_in, in, opcode, MLX5_CMD_OP_DESTROY_LAG); err = mlx5_cmd_exec_in(dev0, destroy_lag, in); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag_mp.c b/drivers/net/ethernet/mellanox/mlx5/core/lag_mp.c index c4bf8b679541..516bfc2bd797 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/lag_mp.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/lag_mp.c @@ -302,6 +302,14 @@ static int mlx5_lag_fib_event(struct notifier_block *nb, return NOTIFY_DONE; } +void mlx5_lag_mp_reset(struct mlx5_lag *ldev) +{ + /* Clear mfi, as it might become stale when a route delete event + * has been missed, see mlx5_lag_fib_route_event(). + */ + ldev->lag_mp.mfi = NULL; +} + int mlx5_lag_mp_init(struct mlx5_lag *ldev) { struct lag_mp *mp = &ldev->lag_mp; diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag_mp.h b/drivers/net/ethernet/mellanox/mlx5/core/lag_mp.h index 258ac7b2964e..729c839397a8 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/lag_mp.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/lag_mp.h @@ -21,11 +21,13 @@ struct lag_mp { #ifdef CONFIG_MLX5_ESWITCH +void mlx5_lag_mp_reset(struct mlx5_lag *ldev); int mlx5_lag_mp_init(struct mlx5_lag *ldev); void mlx5_lag_mp_cleanup(struct mlx5_lag *ldev); #else /* CONFIG_MLX5_ESWITCH */ +static inline void mlx5_lag_mp_reset(struct mlx5_lag *ldev) {}; static inline int mlx5_lag_mp_init(struct mlx5_lag *ldev) { return 0; } static inline void mlx5_lag_mp_cleanup(struct mlx5_lag *ldev) {} |