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* [dpdk-dev] [RFC V1] ethdev: fix the issue that dev uninit may be called twice
@ 2021-08-02 12:46 Huisong Li
  2021-08-03  2:30 ` [dpdk-dev] [RFC V2] ethdev: fix issue that dev close in PMD calls twice Huisong Li
                   ` (5 more replies)
  0 siblings, 6 replies; 33+ messages in thread
From: Huisong Li @ 2021-08-02 12:46 UTC (permalink / raw)
  To: dev; +Cc: thomas, ferruh.yigit, lihuisong

Ethernet devices in DPDK can be released by rte_eth_dev_close() and
rte_dev_remove(). However, these two APIs do not have explicit invocation
restrictions. In other words, at the ethdev layer, calling
rte_eth_dev_close() and then rte_dev_remove() or rte_eal_hotplug_remove()
is allowed. In such a bad scenario, the primary process may be fine, but it
may cause that dev_unint() in the secondary process will be called twice,
and even other serious problems. So this patch fixes it.

Fixes: 99a2dd955fba ("lib: remove librte_ prefix from directory names")

Signed-off-by: Huisong Li <lihuisong@huawei.com>
---
 lib/ethdev/ethdev_pci.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lib/ethdev/ethdev_pci.h b/lib/ethdev/ethdev_pci.h
index 8edca82..14a0e01 100644
--- a/lib/ethdev/ethdev_pci.h
+++ b/lib/ethdev/ethdev_pci.h
@@ -151,6 +151,19 @@ rte_eth_dev_pci_generic_remove(struct rte_pci_device *pci_dev,
 	if (!eth_dev)
 		return 0;
 
+	/*
+	 * The eth_dev->data->name doesn't be cleared by the secondary precess,
+	 * so above "eth_dev" isn't NULL after rte_eth_dev_close() called.
+	 * Namely, whether "eth_dev" is NULL cannot be used to determine whether
+	 * an ethdev port has been released.
+	 * For both primary precess and secondary precess, eth_dev->state is
+	 * RTE_ETH_DEV_UNUSED, which means the ethdev port has been released.
+	 */
+	if (eth_dev->state == RTE_ETH_DEV_UNUSED) {
+		RTE_ETHDEV_LOG(INFO, "The ethdev port has been released.");
+		return 0;
+	}
+
 	if (dev_uninit) {
 		ret = dev_uninit(eth_dev);
 		if (ret)
-- 
2.8.1


^ permalink raw reply	[flat|nested] 33+ messages in thread

end of thread, other threads:[~2021-10-21 21:19 UTC | newest]

Thread overview: 33+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-08-02 12:46 [dpdk-dev] [RFC V1] ethdev: fix the issue that dev uninit may be called twice Huisong Li
2021-08-03  2:30 ` [dpdk-dev] [RFC V2] ethdev: fix issue that dev close in PMD calls twice Huisong Li
2021-08-13  2:11   ` Huisong Li
2021-08-13  6:12     ` Thomas Monjalon
2021-08-13  8:16       ` Huisong Li
2021-08-18 11:24         ` Ferruh Yigit
2021-08-19  3:45           ` Huisong Li
2021-08-24 14:42             ` Ferruh Yigit
2021-08-25  9:53               ` Huisong Li
2021-09-04  1:23                 ` Huisong Li
2021-09-18  3:31                 ` Huisong Li
2021-09-20 14:07                 ` Ferruh Yigit
2021-09-22  3:31                   ` Huisong Li
2021-09-28  7:19                     ` Singh, Aman Deep
2021-09-30 10:54                       ` Huisong Li
2021-09-30 11:01                         ` Ferruh Yigit
2021-10-08  6:13                           ` lihuisong (C)
2021-08-18  9:47 ` [dpdk-dev] [RFC V1] ethdev: fix the issue that dev uninit may be called twice Singh, Aman Deep
2021-08-24  2:10   ` Huisong Li
2021-10-08  8:21 ` [dpdk-dev] [PATCH] ethdev: fix eth device released repeatedly Huisong Li
2021-10-08 10:23   ` Thomas Monjalon
2021-10-09  1:29     ` lihuisong (C)
2021-10-12 11:39 ` [dpdk-dev] [PATCH V2] " Huisong Li
2021-10-12 15:33   ` Thomas Monjalon
2021-10-14  3:50     ` lihuisong (C)
2021-10-14 12:32     ` lihuisong (C)
2021-10-14 12:50       ` Thomas Monjalon
2021-10-15  3:03         ` lihuisong (C)
2021-10-15  3:44 ` [dpdk-dev] [PATCH V3] " Huisong Li
2021-10-19 13:09   ` Ferruh Yigit
2021-10-21  2:31     ` lihuisong (C)
2021-10-21  2:24 ` [dpdk-dev] [PATCH V4] " Huisong Li
2021-10-21 21:19   ` Ferruh Yigit

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