[dpdk-dev] [PATCH v5 2/5] net/tap: fix mbuf and mem leak during queue release

[wangyunjian]

From: Yunjian Wang <wangyunjian at huawei.com>

For the tap PMD, we should release mbufs and iovecs from the Rx queue when
closing device. In order to remove duplicated code, rte_pmd_tap_remove()
calls tap_dev_close().

Fixes: 0781f5762cfe ("net/tap: support segmented mbufs")
CC: stable at dpdk.org

Reviewed-by: Ferruh Yigit <ferruh.yigit at intel.com>
Signed-off-by: Yunjian Wang <wangyunjian at huawei.com>
---
 drivers/net/tap/rte_eth_tap.c | 36 ++++++++++++++---------------------
 1 file changed, 14 insertions(+), 22 deletions(-)

diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
index 3f4042e5b..0156d689d 100644
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -1023,15 +1023,25 @@ tap_dev_close(struct rte_eth_dev *dev)
 	int i;
 	struct pmd_internals *internals = dev->data->dev_private;
 	struct pmd_process_private *process_private = dev->process_private;
+	struct rx_queue *rxq;
 
 	tap_link_set_down(dev);
-	tap_flow_flush(dev, NULL);
-	tap_flow_implicit_flush(internals, NULL);
+	if (internals->nlsk_fd != -1) {
+		tap_flow_flush(dev, NULL);
+		tap_flow_implicit_flush(internals, NULL);
+		tap_nl_final(internals->nlsk_fd);
+		internals->nlsk_fd = -1;
+	}
 
 	for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
 		if (process_private->rxq_fds[i] != -1) {
+			rxq = &internals->rxq[i];
 			close(process_private->rxq_fds[i]);
 			process_private->rxq_fds[i] = -1;
+			rte_pktmbuf_free(rxq->pool);
+			rte_free(rxq->iovecs);
+			rxq->pool = NULL;
+			rxq->iovecs = NULL;
 		}
 		if (process_private->txq_fds[i] != -1) {
 			close(process_private->txq_fds[i]);
@@ -2399,8 +2409,6 @@ rte_pmd_tap_remove(struct rte_vdev_device *dev)
 {
 	struct rte_eth_dev *eth_dev = NULL;
 	struct pmd_internals *internals;
-	struct pmd_process_private *process_private;
-	int i;
 
 	/* find the ethdev entry */
 	eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
@@ -2413,28 +2421,12 @@ rte_pmd_tap_remove(struct rte_vdev_device *dev)
 	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 		return rte_eth_dev_release_port(eth_dev);
 
-	internals = eth_dev->data->dev_private;
-	process_private = eth_dev->process_private;
+	tap_dev_close(eth_dev);
 
+	internals = eth_dev->data->dev_private;
 	TAP_LOG(DEBUG, "Closing %s Ethernet device on numa %u",
 		tuntap_types[internals->type], rte_socket_id());
 
-	if (internals->nlsk_fd) {
-		tap_flow_flush(eth_dev, NULL);
-		tap_flow_implicit_flush(internals, NULL);
-		tap_nl_final(internals->nlsk_fd);
-	}
-	for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
-		if (process_private->rxq_fds[i] != -1) {
-			close(process_private->rxq_fds[i]);
-			process_private->rxq_fds[i] = -1;
-		}
-		if (process_private->txq_fds[i] != -1) {
-			close(process_private->txq_fds[i]);
-			process_private->txq_fds[i] = -1;
-		}
-	}
-
 	close(internals->ioctl_sock);
 	rte_free(eth_dev->process_private);
 	if (tap_devices_count == 1)
-- 
2.19.1