DAOS-16799 vos: handle concurrent pool_open in VOS (#15524)

The pool_open() logic maybe yield in VOS, then it is possible that multiple pool_open() sponsors open the same vos pool concurrently. This patch serializes such concurrent pool_open() and handle kinds of race conditions. Signed-off-by: Fan Yong <[email protected]>
daos-stack · Jan 15, 2025 · 1607bf8 · 1607bf8
1 parent a94ac88
commit 1607bf8
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diff --git a/src/vos/vos_internal.h b/src/vos/vos_internal.h
@@ -1,5 +1,6 @@
 /**
  * (C) Copyright 2016-2024 Intel Corporation.
+ * (C) Copyright 2025 Hewlett Packard Enterprise Development LP
  *
  * SPDX-License-Identifier: BSD-2-Clause-Patent
  */
@@ -279,10 +280,13 @@ struct vos_pool {
 	/** VOS uuid hash-link with refcnt */
 	struct d_ulink		vp_hlink;
 	/** number of openers */
-	uint32_t                 vp_opened : 30;
-	uint32_t                 vp_dying  : 1;
+	uint32_t                vp_opened;
+	uint32_t                vp_dying:1,
+				vp_opening:1,
 	/** exclusive handle (see VOS_POF_EXCL) */
-	int			vp_excl:1;
+				vp_excl:1;
+	ABT_mutex		vp_mutex;
+	ABT_cond		vp_cond;
 	/* this pool is for sysdb */
 	bool			vp_sysdb;
 	/** this pool is for rdb */