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From: Edward Tomasz Napierala <trasz@FreeBSD.org>
To: Perforce Change Reviews <perforce@freebsd.org>
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Subject: PERFORCE change 147636 for review
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http://perforce.freebsd.org/chv.cgi?CH=147636

Change 147636 by trasz@trasz_traszkan on 2008/08/17 10:33:56

	Make UFS behave the same as ZFS (and UFS in SunOS) does when moving
	a subdirectory between two directories.  Without this change, moving
	a/x/ to b/ requires write permission on a/, b/, _and_ a/x/.  After
	this change, it requires only write permissions on a/ and b/.
	
	I guess this may be a little controversial.  ;-)

Affected files ...

.. //depot/projects/soc2008/trasz_nfs4acl/sys/ufs/ufs/ufs_vnops.c#15 edit

Differences ...

==== //depot/projects/soc2008/trasz_nfs4acl/sys/ufs/ufs/ufs_vnops.c#15 (text+ko) ====

@@ -1164,19 +1164,14 @@
 	 * If ".." must be changed (ie the directory gets a new
 	 * parent) then the source directory must not be in the
 	 * directory hierarchy above the target, as this would
-	 * orphan everything below the source directory. Also
-	 * the user must have write permission in the source so
-	 * as to be able to change "..". We must repeat the call
-	 * to namei, as the parent directory is unlocked by the
-	 * call to checkpath().
+	 * orphan everything below the source directory.  We must
+	 * repeat the call to namei, as the parent directory
+	 * is unlocked by the call to checkpath().
 	 */
-	error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_thread);
 	VOP_UNLOCK(fvp, 0);
 	if (oldparent != dp->i_number)
 		newparent = dp->i_number;
 	if (doingdirectory && newparent) {
-		if (error)	/* write access check above */
-			goto bad;
 		if (xp != NULL)
 			vput(tvp);
 		error = ufs_checkpath(ip, dp, tcnp->cn_cred);