On 03/03/2019 11:56, [email protected] wrote:
> From: Tonghao Zhang <[email protected]>
>
> If we try to set VFs rate on a VF (not PF) net device, the kernel
> will be crash. The commands are show as below:
>
> $ echo 2 > /sys/class/net/$MLX_PF0/device/sriov_numvfs
> $ ip link set $MLX_VF0 vf 0 rate 100
actually this didn't reproduce with this command + your first fix.
setting rate calls netlink IFLA_VF_TX_RATE which is calling
nfo_get_vf_config() which is now returning error correctly.
we need the netlink call to be IFLA_VF_RATE. seems we get there
when we set min/max_tx_rate.
so i reproduce the error with this command
$ ip link set dev $VF vf 0 max_tx_rate 2 max_tx_rate 1
can you verify and fix the commit msg?
>
> Fixes: c9497c98901c ("net/mlx5: Add support for setting VF min rate")
> Cc: Mohamad Haj Yahia <[email protected]>
> Signed-off-by: Tonghao Zhang <[email protected]>
> ---
> drivers/net/ethernet/mellanox/mlx5/core/eswitch.c | 13 +++++++++----
> 1 file changed, 9 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
> b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
> index 774edc9..8c2f1e6 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
> @@ -2122,19 +2122,24 @@ static int normalize_vports_min_rate(struct
> mlx5_eswitch *esw, u32 divider)
> int mlx5_eswitch_set_vport_rate(struct mlx5_eswitch *esw, int vport,
> u32 max_rate, u32 min_rate)
> {
> - u32 fw_max_bw_share = MLX5_CAP_QOS(esw->dev, max_tsar_bw_share);
> - bool min_rate_supported = MLX5_CAP_QOS(esw->dev, esw_bw_share) &&
> - fw_max_bw_share >= MLX5_MIN_BW_SHARE;
> - bool max_rate_supported = MLX5_CAP_QOS(esw->dev, esw_rate_limit);
> struct mlx5_vport *evport;
> + u32 fw_max_bw_share;
> u32 previous_min_rate;
> u32 divider;
> + bool min_rate_supported;
> + bool max_rate_supported;
> int err = 0;
>
> if (!ESW_ALLOWED(esw))
> return -EPERM;
> if (!LEGAL_VPORT(esw, vport))
> return -EINVAL;
> +
> + fw_max_bw_share = MLX5_CAP_QOS(esw->dev, max_tsar_bw_share);
> + min_rate_supported = MLX5_CAP_QOS(esw->dev, esw_bw_share) &&
> + fw_max_bw_share >= MLX5_MIN_BW_SHARE;
> + max_rate_supported = MLX5_CAP_QOS(esw->dev, esw_rate_limit);
> +
> if ((min_rate && !min_rate_supported) || (max_rate &&
> !max_rate_supported))
> return -EOPNOTSUPP;
>
>
