From 14ea2071a81a1af520255018bc6d37f5a6260d46 Mon Sep 17 00:00:00 2001
From: jhb <jhb@FreeBSD.org>
Date: Tue, 18 Nov 2008 23:18:37 +0000
Subject: When looking up the vnode for the device to mount the filesystem on,
 ask NDINIT to return a locked vnode instead of letting it drop the lock and
 return a referenced vnode and then relock the vnode a few lines down.  This
 matches the behavior of other filesystem mount routines.

---
 sys/fs/cd9660/cd9660_vfsops.c | 20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

(limited to 'sys/fs')

diff --git a/sys/fs/cd9660/cd9660_vfsops.c b/sys/fs/cd9660/cd9660_vfsops.c
index 919ecf7..adca4c0 100644
--- a/sys/fs/cd9660/cd9660_vfsops.c
+++ b/sys/fs/cd9660/cd9660_vfsops.c
@@ -153,14 +153,14 @@ cd9660_mount(struct mount *mp, struct thread *td)
 	 * Not an update, or updating the name: look up the name
 	 * and verify that it refers to a sensible block device.
 	 */
-	NDINIT(&ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, td);
+	NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td);
 	if ((error = namei(&ndp)))
 		return (error);
 	NDFREE(&ndp, NDF_ONLY_PNBUF);
 	devvp = ndp.ni_vp;
 
 	if (!vn_isdisk(devvp, &error)) {
-		vrele(devvp);
+		vput(devvp);
 		return (error);
 	}
 
@@ -169,7 +169,6 @@ cd9660_mount(struct mount *mp, struct thread *td)
 	 * or has superuser abilities
 	 */
 	accmode = VREAD;
-	vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
 	error = VOP_ACCESS(devvp, accmode, td->td_ucred, td);
 	if (error)
 		error = priv_check(td, PRIV_VFS_MOUNT_PERM);
@@ -177,22 +176,20 @@ cd9660_mount(struct mount *mp, struct thread *td)
 		vput(devvp);
 		return (error);
 	}
-	VOP_UNLOCK(devvp, 0);
 
 	if ((mp->mnt_flag & MNT_UPDATE) == 0) {
 		error = iso_mountfs(devvp, mp);
+		if (error)
+			vrele(devvp);
 	} else {
 		if (devvp != imp->im_devvp)
 			error = EINVAL;	/* needs translation */
-		else
-			vrele(devvp);
-	}
-	if (error) {
-		vrele(devvp);
-		return error;
+		vput(devvp);
 	}
+	if (error)
+		return (error);
 	vfs_mountedfrom(mp, fspec);
-	return 0;
+	return (0);
 }
 
 /*
@@ -222,7 +219,6 @@ iso_mountfs(devvp, mp)
 	struct bufobj *bo;
 	char *cs_local, *cs_disk;
 
-	vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
 	DROP_GIANT();
 	g_topology_lock();
 	error = g_vfs_open(devvp, &cp, "cd9660", 0);
-- 
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