net/failsafe: fix removed sub-device cleanup

The fail-safe PMD registers to RMV event for each removable sub-device
port in order to cleanup the sub-device resources and switch the Tx
sub-device directly when it is plugged-out.

During removal time, the fail-safe PMD stops and closes the sub-device
but it doesn't unregister the LSC and RMV callbacks of the sub-device
port.

It can lead the callbacks to be called for a port which is no more
associated with the fail-safe sub-device, because there is not a
guarantee that a sub-device gets the same port ID for each plug-in
process. This port, for example, may belong to another sub-device of a
different fail-safe device.

Unregister the LSC and RMV callbacks for sub-devices which are not
used.

Fixes: 598fb8aec6f6 ("net/failsafe: support device removal")
Cc: stable@dpdk.org
Signed-off-by: Matan Azrad <matan@mellanox.com>
Acked-by: Gaetan Rivet <gaetan.rivet@6wind.com>

diff --git a/drivers/net/failsafe/failsafe_ether.c b/drivers/net/failsafe/failsafe_ether.c
index 733e95d..5b5cb3b 100644 (file)
--- a/drivers/net/failsafe/failsafe_ether.c
+++ b/drivers/net/failsafe/failsafe_ether.c
@@ -260,6 +260,7 @@ fs_dev_remove(struct sub_device *sdev)
                sdev->state = DEV_ACTIVE;
                /* fallthrough */
        case DEV_ACTIVE:
+               failsafe_eth_dev_unregister_callbacks(sdev);
                rte_eth_dev_close(PORT_ID(sdev));
                sdev->state = DEV_PROBED;
                /* fallthrough */
@@ -320,6 +321,35 @@ fs_rxtx_clean(struct sub_device *sdev)
        return 1;
 }
 
+void
+failsafe_eth_dev_unregister_callbacks(struct sub_device *sdev)
+{
+       int ret;
+
+       if (sdev == NULL)
+               return;
+       if (sdev->rmv_callback) {
+               ret = rte_eth_dev_callback_unregister(PORT_ID(sdev),
+                                               RTE_ETH_EVENT_INTR_RMV,
+                                               failsafe_eth_rmv_event_callback,
+                                               sdev);
+               if (ret)
+                       WARN("Failed to unregister RMV callback for sub_device"
+                            " %d", SUB_ID(sdev));
+               sdev->rmv_callback = 0;
+       }
+       if (sdev->lsc_callback) {
+               ret = rte_eth_dev_callback_unregister(PORT_ID(sdev),
+                                               RTE_ETH_EVENT_INTR_LSC,
+                                               failsafe_eth_lsc_event_callback,
+                                               sdev);
+               if (ret)
+                       WARN("Failed to unregister LSC callback for sub_device"
+                            " %d", SUB_ID(sdev));
+               sdev->lsc_callback = 0;
+       }
+}
+
 void
 failsafe_dev_remove(struct rte_eth_dev *dev)
 {

diff --git a/drivers/net/failsafe/failsafe_ops.c b/drivers/net/failsafe/failsafe_ops.c
index d04277b..e0570b6 100644 (file)
--- a/drivers/net/failsafe/failsafe_ops.c
+++ b/drivers/net/failsafe/failsafe_ops.c
@@ -146,6 +146,8 @@ fs_dev_configure(struct rte_eth_dev *dev)
                        if (ret)
                                WARN("Failed to register RMV callback for sub_device %d",
                                     SUB_ID(sdev));
+                       else
+                               sdev->rmv_callback = 1;
                }
                dev->data->dev_conf.intr_conf.rmv = 0;
                if (lsc_interrupt) {
@@ -156,6 +158,8 @@ fs_dev_configure(struct rte_eth_dev *dev)
                        if (ret)
                                WARN("Failed to register LSC callback for sub_device %d",
                                     SUB_ID(sdev));
+                       else
+                               sdev->lsc_callback = 1;
                }
                dev->data->dev_conf.intr_conf.lsc = lsc_enabled;
                sdev->state = DEV_ACTIVE;
@@ -282,6 +286,7 @@ fs_dev_close(struct rte_eth_dev *dev)
        PRIV(dev)->state = DEV_ACTIVE - 1;
        FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_ACTIVE) {
                DEBUG("Closing sub_device %d", i);
+               failsafe_eth_dev_unregister_callbacks(sdev);
                rte_eth_dev_close(PORT_ID(sdev));
                sdev->state = DEV_ACTIVE - 1;
        }

diff --git a/drivers/net/failsafe/failsafe_private.h b/drivers/net/failsafe/failsafe_private.h
index 7e6a3f8..886af86 100644 (file)
--- a/drivers/net/failsafe/failsafe_private.h
+++ b/drivers/net/failsafe/failsafe_private.h
@@ -119,6 +119,10 @@ struct sub_device {
        volatile unsigned int remove:1;
        /* flow isolation state */
        int flow_isolated:1;
+       /* RMV callback registration state */
+       unsigned int rmv_callback:1;
+       /* LSC callback registration state */
+       unsigned int lsc_callback:1;
 };
 
 struct fs_priv {
@@ -211,6 +215,7 @@ int failsafe_eal_uninit(struct rte_eth_dev *dev);
 /* ETH_DEV */
 
 int failsafe_eth_dev_state_sync(struct rte_eth_dev *dev);
+void failsafe_eth_dev_unregister_callbacks(struct sub_device *sdev);
 void failsafe_dev_remove(struct rte_eth_dev *dev);
 void failsafe_stats_increment(struct rte_eth_stats *to,
                                struct rte_eth_stats *from);