[dpdk-stable] patch 'net/tap: fix mbuf and mem leak during queue release' has been queued to stable release 19.11.3

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 19.11.3

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/21/20. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Thanks.

Luca Boccassi

---
>From 2fe4af64f9f3d2c979fde46a7f7ecd81f292d45a Mon Sep 17 00:00:00 2001
From: Yunjian Wang <wangyunjian at huawei.com>
Date: Thu, 16 Apr 2020 11:04:25 +0800
Subject: [PATCH] net/tap: fix mbuf and mem leak during queue release

[ upstream commit 710aa4279097e9ee5a131b7e0732e5a8ef8bcfc1 ]

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")

Signed-off-by: Yunjian Wang <wangyunjian at huawei.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit at intel.com>
Acked-by: Stephen Hemminger <stephen at networkplumber.org>
---
 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 6d54c254d7..9c88b9268e 100644
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -1020,15 +1020,25 @@ 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]);
@@ -2398,8 +2408,6 @@ 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));
@@ -2412,28 +2420,12 @@ 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);
 
+	tap_dev_close(eth_dev);
+
 	internals = eth_dev->data->dev_private;
-	process_private = eth_dev->process_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)
-- 
2.20.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2020-05-19 14:04:48.307562558 +0100
+++ 0094-net-tap-fix-mbuf-and-mem-leak-during-queue-release.patch	2020-05-19 14:04:44.304649968 +0100
@@ -1,14 +1,15 @@
-From 710aa4279097e9ee5a131b7e0732e5a8ef8bcfc1 Mon Sep 17 00:00:00 2001
+From 2fe4af64f9f3d2c979fde46a7f7ecd81f292d45a Mon Sep 17 00:00:00 2001
 From: Yunjian Wang <wangyunjian at huawei.com>
 Date: Thu, 16 Apr 2020 11:04:25 +0800
 Subject: [PATCH] net/tap: fix mbuf and mem leak during queue release
 
+[ upstream commit 710aa4279097e9ee5a131b7e0732e5a8ef8bcfc1 ]
+
 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
 
 Signed-off-by: Yunjian Wang <wangyunjian at huawei.com>
 Reviewed-by: Ferruh Yigit <ferruh.yigit at intel.com>