diff options
| author | avg <avg@FreeBSD.org> | 2012-11-04 14:16:18 +0000 |
|---|---|---|
| committer | avg <avg@FreeBSD.org> | 2012-11-04 14:16:18 +0000 |
| commit | 7dbda87219e7bda1f7b868ed231f51f0e67a385d (patch) | |
| tree | dfed970aa7c1f2810741ad5f59c6cdcc9e20f7d4 /sys/cddl | |
| parent | 7a24c90d139bce8a41b84dbbb7d46cbe9b617479 (diff) | |
| download | FreeBSD-src-7dbda87219e7bda1f7b868ed231f51f0e67a385d.zip FreeBSD-src-7dbda87219e7bda1f7b868ed231f51f0e67a385d.tar.gz | |
opensolaris_lookup: use vfs_busy in traverse before calling VFS_ROOT
... to ensure that we have a valid mountpoint during the call.
Reviewed by: kib
MFC after: 19 days
Diffstat (limited to 'sys/cddl')
| -rw-r--r-- | sys/cddl/compat/opensolaris/kern/opensolaris_lookup.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/cddl/compat/opensolaris/kern/opensolaris_lookup.c b/sys/cddl/compat/opensolaris/kern/opensolaris_lookup.c index a7ec8b9..94383d6 100644 --- a/sys/cddl/compat/opensolaris/kern/opensolaris_lookup.c +++ b/sys/cddl/compat/opensolaris/kern/opensolaris_lookup.c @@ -88,6 +88,7 @@ traverse(vnode_t **cvpp, int lktype) vfsp = vn_mountedvfs(cvp); if (vfsp == NULL) break; + error = vfs_busy(vfsp, 0); /* * tvp is NULL for *cvpp vnode, which we can't unlock. */ @@ -95,12 +96,15 @@ traverse(vnode_t **cvpp, int lktype) vput(cvp); else vrele(cvp); + if (error) + return (error); /* * The read lock must be held across the call to VFS_ROOT() to * prevent a concurrent unmount from destroying the vfs. */ error = VFS_ROOT(vfsp, lktype, &tvp); + vfs_unbusy(vfsp); if (error != 0) return (error); cvp = tvp; |
