The number of stations in use is kept in the num_rx_pools counter in the ixgbe_adapter structure. This is in turn used by the queue allocation scheme to determine how many queues are needed to support the number of pools in use with the current feature set. This works as long as the pools are added and destroyed in order because (num_rx_pools * queues_per_pool) is equal to the last queue in use by a pool. But as soon as you delete a pool out of order this is no longer the case. So the above multiplication allocates to few queues and a pool may reference a ring that has not been allocated/initialized. To resolve use the bit mask of in use pools to determine the final pool being used and allocate enough queues so that we don't inadvertently remove its queues. # ip link add link eth2 \ numtxqueues 4 numrxqueues 4 txqueuelen 50 type macvlan # ip link set dev macvlan0 up # ip link add link eth2 \ numtxqueues 4 numrxqueues 4 txqueuelen 50 type macvlan # ip link set dev macvlan1 up # for i in {0..100}; do ip link set dev macvlan0 down; ip link set dev macvlan0 up; done;
Unified · Split
| @@ -7536,6 +7536,7 @@ static void *ixgbe_fwd_add(struct net_device *pdev, struct net_device *vdev) · 7535 unmodified lines | ||
| 7536 | 7536 | { |
| 7537 | 7537 | struct ixgbe_fwd_adapter *fwd_adapter = NULL; |
| 7538 | 7538 | struct ixgbe_adapter *adapter = netdev_priv(pdev); |
| 7539 | + unsigned int limit; | |
| 7539 | 7540 | int pool, err; |
| 7540 | 7541 | |
| 7541 | 7542 | #ifdef CONFIG_RPS |
| @@ -7566,10 +7567,11 @@ static void *ixgbe_fwd_add(struct net_device *pdev, struct net_device *vdev) · 24 unmodified lines | ||
| 7566 | 7567 | pool = find_first_zero_bit(&adapter->fwd_bitmask, 32); |
| 7567 | 7568 | adapter->num_rx_pools++; |
| 7568 | 7569 | set_bit(pool, &adapter->fwd_bitmask); |
| 7570 | + limit = find_last_bit(&adapter->fwd_bitmask, 32); | |
| 7569 | 7571 | |
| 7570 | 7572 | /* Enable VMDq flag so device will be set in VM mode */ |
| 7571 | 7573 | adapter->flags |= IXGBE_FLAG_VMDQ_ENABLED | IXGBE_FLAG_SRIOV_ENABLED; |
| 7572 | − adapter->ring_feature[RING_F_VMDQ].limit = adapter->num_rx_pools; | |
| 7574 | + adapter->ring_feature[RING_F_VMDQ].limit = limit + 1; | |
| 7573 | 7575 | adapter->ring_feature[RING_F_RSS].limit = vdev->num_tx_queues; |
| 7574 | 7576 | |
| 7575 | 7577 | /* Force reinit of ring allocation with VMDQ enabled */ |
| @@ -7597,11 +7599,13 @@ static void ixgbe_fwd_del(struct net_device *pdev, void *priv) · 21 unmodified lines | ||
| 7597 | 7599 | { |
| 7598 | 7600 | struct ixgbe_fwd_adapter *fwd_adapter = priv; |
| 7599 | 7601 | struct ixgbe_adapter *adapter = fwd_adapter->real_adapter; |
| 7602 | + unsigned int limit; | |
| 7600 | 7603 | |
| 7601 | 7604 | clear_bit(fwd_adapter->pool, &adapter->fwd_bitmask); |
| 7602 | 7605 | adapter->num_rx_pools--; |
| 7603 | 7606 | |
| 7604 | − adapter->ring_feature[RING_F_VMDQ].limit = adapter->num_rx_pools; | |
| 7607 | + limit = find_last_bit(&adapter->fwd_bitmask, 32); | |
| 7608 | + adapter->ring_feature[RING_F_VMDQ].limit = limit + 1; | |
| 7605 | 7609 | ixgbe_fwd_ring_down(fwd_adapter->netdev, fwd_adapter); |
| 7606 | 7610 | ixgbe_setup_tc(pdev, netdev_get_num_tc(pdev)); |
| 7607 | 7611 | netdev_dbg(pdev, "pool %i:%i queues %i:%i VSI bitmask %lx\n", |