From: Miklos Szeredi <mszeredi@redhat.com>
Date: Mon, 5 Sep 2016 11:55:20 +0000 (+0200)
Subject: ovl: fix workdir creation
X-Git-Tag: v4.14-rc1~2517^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e1ff3dd1ae52cef5b5373c8cc4ad949c2c25a71c;p=platform%2Fkernel%2Flinux-rpi.git

ovl: fix workdir creation

Workdir creation fails in latest kernel.

Fix by allowing EOPNOTSUPP as a valid return value from
vfs_removexattr(XATTR_NAME_POSIX_ACL_*).  Upper filesystem may not support
ACL and still be perfectly able to support overlayfs.

Reported-by: Martin Ziegler <ziegler@uni-freiburg.de>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: c11b9fdd6a61 ("ovl: remove posix_acl_default from workdir")
Cc: <stable@vger.kernel.org>
---

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index a4585f9..e2a94a2 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -835,11 +835,11 @@ retry:
 			goto out_dput;
 
 		err = vfs_removexattr(work, XATTR_NAME_POSIX_ACL_DEFAULT);
-		if (err && err != -ENODATA)
+		if (err && err != -ENODATA && err != -EOPNOTSUPP)
 			goto out_dput;
 
 		err = vfs_removexattr(work, XATTR_NAME_POSIX_ACL_ACCESS);
-		if (err && err != -ENODATA)
+		if (err && err != -ENODATA && err != -EOPNOTSUPP)
 			goto out_dput;
 
 		/* Clear any inherited mode bits */