[src/trunk]: src/sys/fs/msdosfs Lock vnode for vinvalbuf().

[hannken <hannken%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/6e6b40ad3ef0
branches:  trunk
changeset: 365240:6e6b40ad3ef0
user:      hannken <hannken%NetBSD.org@localhost>
date:      Sat Apr 16 07:58:21 2022 +0000

description:
Lock vnode for vinvalbuf().

diffstat:

 sys/fs/msdosfs/msdosfs_vfsops.c |  9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diffs (30 lines):

diff -r 9fb38e5fd47f -r 6e6b40ad3ef0 sys/fs/msdosfs/msdosfs_vfsops.c
--- a/sys/fs/msdosfs/msdosfs_vfsops.c   Sat Apr 16 07:56:45 2022 +0000
+++ b/sys/fs/msdosfs/msdosfs_vfsops.c   Sat Apr 16 07:58:21 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: msdosfs_vfsops.c,v 1.137 2021/10/23 16:58:17 thorpej Exp $     */
+/*     $NetBSD: msdosfs_vfsops.c,v 1.138 2022/04/16 07:58:21 hannken Exp $     */
 
 /*-
  * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
@@ -48,7 +48,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: msdosfs_vfsops.c,v 1.137 2021/10/23 16:58:17 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: msdosfs_vfsops.c,v 1.138 2022/04/16 07:58:21 hannken Exp $");
 
 #if defined(_KERNEL_OPT)
 #include "opt_compat_netbsd.h"
@@ -472,7 +472,10 @@
        u_long fatbytes, fatblocksecs;
 
        /* Flush out any old buffers remaining from a previous use. */
-       if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0)
+       vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
+       error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0);
+       VOP_UNLOCK(devvp);
+       if (error)
                return (error);
 
        ronly = (mp->mnt_flag & MNT_RDONLY) != 0;