From: Antonio Huete Jimenez <tuxillo@quantumachine.net>
Date: Mon, 19 Nov 2012 22:32:16 +0000 (+0100)
Subject: ext2fs - Clear CNP_PDIRUNLOCK flag after a lookup.
X-Git-Tag: v3.4.0rc~818
X-Git-Url: http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff_plain/5f4f1383e0706850f4d42e49fc37813cf7943539

ext2fs - Clear CNP_PDIRUNLOCK flag after a lookup.

vop_compat_nresolve() unlocks the vnode when flag CNP_PDIRUNLOCK
is set, so either we clear the flag or avoid unlocking the vnode
after an ext2_lookup().

DragonFly-bug: http://bugs.dragonflybsd.org/issues/2454

Reported by: Skylar Hawk
---

diff --git a/sys/gnu/vfs/ext2fs/ext2_lookup.c b/sys/gnu/vfs/ext2fs/ext2_lookup.c
index 0f69e3e..1dd68e1 100644
--- a/sys/gnu/vfs/ext2fs/ext2_lookup.c
+++ b/sys/gnu/vfs/ext2fs/ext2_lookup.c
@@ -658,8 +658,10 @@ found:
 	} else {
 		if ((error = VFS_VGET(vdp->v_mount, NULL, dp->i_ino, &tdp)) != 0)
 			return (error);
-		if (!lockparent)
+		if (!lockparent) {
 			vn_unlock(pdp);
+			cnp->cn_flags |= CNP_PDIRUNLOCK;
+		}
 		*vpp = tdp;
 	}
 	return (0);