target/linux/generic/patches-4.4/051-0007-ovl-fix-workdir-creation.patch

   1 From e1ff3dd1ae52cef5b5373c8cc4ad949c2c25a71c Mon Sep 17 00:00:00 2001
   2 From: Miklos Szeredi <mszeredi@redhat.com>
   3 Date: Mon, 5 Sep 2016 13:55:20 +0200
   4 Subject: [PATCH] ovl: fix workdir creation
   5
   6 Workdir creation fails in latest kernel.
   7
   8 Fix by allowing EOPNOTSUPP as a valid return value from
   9 vfs_removexattr(XATTR_NAME_POSIX_ACL_*).  Upper filesystem may not support
  10 ACL and still be perfectly able to support overlayfs.
  11
  12 Reported-by: Martin Ziegler <ziegler@uni-freiburg.de>
  13 Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
  14 Fixes: c11b9fdd6a61 ("ovl: remove posix_acl_default from workdir")
  15 Cc: <stable@vger.kernel.org>
  16 ---
  17  fs/overlayfs/super.c | 4 ++--
  18  1 file changed, 2 insertions(+), 2 deletions(-)
  19
  20 --- a/fs/overlayfs/super.c
  21 +++ b/fs/overlayfs/super.c
  22 @@ -794,11 +794,11 @@ retry:
  23                         goto out_dput;
  24
  25                 err = vfs_removexattr(work, XATTR_NAME_POSIX_ACL_DEFAULT);
  26 -               if (err && err != -ENODATA)
  27 +               if (err && err != -ENODATA && err != -EOPNOTSUPP)
  28                         goto out_dput;
  29
  30                 err = vfs_removexattr(work, XATTR_NAME_POSIX_ACL_ACCESS);
  31 -               if (err && err != -ENODATA)
  32 +               if (err && err != -ENODATA && err != -EOPNOTSUPP)
  33                         goto out_dput;
  34
  35                 /* Clear any inherited mode bits */