From: Maher Sanalla msanalla@nvidia.com
[ Upstream commit ae396d85c01c7bdc9eeceecde1f493d03f793465 ]
Currently, In NETDEV_CHANGELOWERSTATE/NETDEV_CHANGEUPPERSTATE events handling, tracking is not fully completed if the LAG device is not ready at the time the events occur. But, we must keep track of the upper and lower states after receiving the events because RoCE needs this info in mlx5_lag_get_roce_netdev() - in order to return the corresponding port that its running on. Returning the wrong (not most recent) port will lead to gids table being incorrect.
For example: If during the attachment of a slave to the bond, the other non-attached port performs pci_reload, then the LAG device is not ready, but that should not result in dismissing attached slave tracker update automatically (which is performed in mlx5_handle_changelowerstate()), Since these events might not come later, which can lead to both bond ports having tx_enabled=0 - which is not a valid state of LAG bond.
Fixes: 9b412cc35f00 ("net/mlx5e: Add LAG warning if bond slave is not lag master") Signed-off-by: Maher Sanalla msanalla@nvidia.com Reviewed-by: Mark Bloch mbloch@nvidia.com Reviewed-by: Jianbo Liu jianbol@nvidia.com Reviewed-by: Roi Dayan roid@nvidia.com Signed-off-by: Saeed Mahameed saeedm@nvidia.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/mellanox/mlx5/core/lag.c | 28 +++++++++---------- 1 file changed, 13 insertions(+), 15 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag.c b/drivers/net/ethernet/mellanox/mlx5/core/lag.c index fe5476a76464f..11cc3ea5010aa 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/lag.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/lag.c @@ -365,6 +365,7 @@ static int mlx5_handle_changeupper_event(struct mlx5_lag *ldev, bool is_bonded, is_in_lag, mode_supported; int bond_status = 0; int num_slaves = 0; + int changed = 0; int idx;
if (!netif_is_lag_master(upper)) @@ -401,27 +402,27 @@ static int mlx5_handle_changeupper_event(struct mlx5_lag *ldev, */ is_in_lag = num_slaves == MLX5_MAX_PORTS && bond_status == 0x3;
- if (!mlx5_lag_is_ready(ldev) && is_in_lag) { - NL_SET_ERR_MSG_MOD(info->info.extack, - "Can't activate LAG offload, PF is configured with more than 64 VFs"); - return 0; - } - /* Lag mode must be activebackup or hash. */ mode_supported = tracker->tx_type == NETDEV_LAG_TX_TYPE_ACTIVEBACKUP || tracker->tx_type == NETDEV_LAG_TX_TYPE_HASH;
- if (is_in_lag && !mode_supported) - NL_SET_ERR_MSG_MOD(info->info.extack, - "Can't activate LAG offload, TX type isn't supported"); - is_bonded = is_in_lag && mode_supported; if (tracker->is_bonded != is_bonded) { tracker->is_bonded = is_bonded; - return 1; + changed = 1; }
- return 0; + if (!is_in_lag) + return changed; + + if (!mlx5_lag_is_ready(ldev)) + NL_SET_ERR_MSG_MOD(info->info.extack, + "Can't activate LAG offload, PF is configured with more than 64 VFs"); + else if (!mode_supported) + NL_SET_ERR_MSG_MOD(info->info.extack, + "Can't activate LAG offload, TX type isn't supported"); + + return changed; }
static int mlx5_handle_changelowerstate_event(struct mlx5_lag *ldev, @@ -464,9 +465,6 @@ static int mlx5_lag_netdev_event(struct notifier_block *this,
ldev = container_of(this, struct mlx5_lag, nb);
- if (!mlx5_lag_is_ready(ldev) && event == NETDEV_CHANGELOWERSTATE) - return NOTIFY_DONE; - tracker = ldev->tracker;
switch (event) {