diff options
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c index b8ec55929ab1..52c3de24bea3 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c @@ -3774,6 +3774,29 @@ void mlx5_eswitch_unblock_mode(struct mlx5_core_dev *dev) up_write(&esw->mode_lock); } +/* Returns false only when uplink netdev exists and its netns is different from + * devlink's netns. True for all others so entering switchdev mode is allowed. + */ +static bool mlx5_devlink_netdev_netns_immutable_set(struct devlink *devlink, + bool immutable) +{ + struct mlx5_core_dev *mdev = devlink_priv(devlink); + struct net_device *netdev; + bool ret; + + netdev = mlx5_uplink_netdev_get(mdev); + if (!netdev) + return true; + + rtnl_lock(); + netdev->netns_immutable = immutable; + ret = net_eq(dev_net(netdev), devlink_net(devlink)); + rtnl_unlock(); + + mlx5_uplink_netdev_put(mdev, netdev); + return ret; +} + int mlx5_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode, struct netlink_ext_ack *extack) { @@ -3816,6 +3839,14 @@ int mlx5_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode, esw->eswitch_operation_in_progress = true; up_write(&esw->mode_lock); + if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV && + !mlx5_devlink_netdev_netns_immutable_set(devlink, true)) { + NL_SET_ERR_MSG_MOD(extack, + "Can't change E-Switch mode to switchdev when netdev net namespace has diverged from the devlink's."); + err = -EINVAL; + goto skip; + } + if (mode == DEVLINK_ESWITCH_MODE_LEGACY) esw->dev->priv.flags |= MLX5_PRIV_FLAGS_SWITCH_LEGACY; mlx5_eswitch_disable_locked(esw); @@ -3834,6 +3865,8 @@ int mlx5_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode, } skip: + if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV && err) + mlx5_devlink_netdev_netns_immutable_set(devlink, false); down_write(&esw->mode_lock); esw->eswitch_operation_in_progress = false; unlock: |