Module Name: src
Committed By: hannken
Date: Mon Feb 6 10:33:32 UTC 2023
Modified Files:
src/sys/fs/union: union_vfsops.c
Log Message:
Set IMNT_MPSAFE only if all lower layers have it set.
To generate a diff of this commit:
cvs rdiff -u -r1.85 -r1.86 src/sys/fs/union/union_vfsops.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/fs/union/union_vfsops.c
diff -u src/sys/fs/union/union_vfsops.c:1.85 src/sys/fs/union/union_vfsops.c:1.86
--- src/sys/fs/union/union_vfsops.c:1.85 Mon Nov 21 10:37:14 2022
+++ src/sys/fs/union/union_vfsops.c Mon Feb 6 10:33:32 2023
@@ -1,4 +1,4 @@
-/* $NetBSD: union_vfsops.c,v 1.85 2022/11/21 10:37:14 hannken Exp $ */
+/* $NetBSD: union_vfsops.c,v 1.86 2023/02/06 10:33:32 hannken Exp $ */
/*
* Copyright (c) 1994 The Regents of the University of California.
@@ -77,7 +77,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: union_vfsops.c,v 1.85 2022/11/21 10:37:14 hannken Exp $");
+__KERNEL_RCSID(0, "$NetBSD: union_vfsops.c,v 1.86 2023/02/06 10:33:32 hannken Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -198,7 +198,14 @@ union_mount(struct mount *mp, const char
goto bad;
}
- mp->mnt_iflag |= IMNT_MPSAFE;
+ /*
+ * This mount is mp-safe if both lower mounts are mp-safe.
+ */
+
+ if (((um->um_lowervp == NULLVP) ||
+ (um->um_lowervp->v_mount->mnt_iflag & IMNT_MPSAFE)) &&
+ (um->um_uppervp->v_mount->mnt_iflag & IMNT_MPSAFE))
+ mp->mnt_iflag |= IMNT_MPSAFE;
/*
* Unless the mount is readonly, ensure that the top layer
