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Re: [PATCH 1/3] statxat: Provide IOC flags for Windows fs attributes

I was experimenting with these flags when adding the per-file
compression support for cifs and smb2/smb3, and noticed that it would
be helpful to be able to display the FILE_ATTRIBUTE_ENCRYPTED flag
here too on get (ie to show that the file is encrypted at rest on the
server).   I am unsure whether displaying the "FILE_ATTRIBUTE_SPARSE"
is useful or not here but that is another obvious one.

And the other obvious flag to display would be
"FILE_ATTRIBUTE_INTEGRITY_STREAM" or equivalent (to indicate that this
file is protected by data and metadata checksums, perhaps btrfs and
other local file systems may even eventually allow you to configure
additional extra data/metadata integrity checks someday as well, not
just SMB3).

On Tue, Nov 12, 2013 at 11:35 AM, David Howells <> wrote:
> Provide IOC flags for Windows fs attributes so that they can be retrieved (or
> even altered) using the FS_IOC_[GS]ETFLAGS ioctl and read using statxat().
> Signed-off-by: David Howells <>
> ---
>  include/uapi/linux/fs.h |    7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
> index 6c28b61bb690..8b966f48dd41 100644
> --- a/include/uapi/linux/fs.h
> +++ b/include/uapi/linux/fs.h
> @@ -191,10 +191,13 @@ struct inodes_stat_t {
>  #define FS_EXTENT_FL                   0x00080000 /* Extents */
>  #define FS_DIRECTIO_FL                 0x00100000 /* Use direct i/o */
>  #define FS_NOCOW_FL                    0x00800000 /* Do not cow file */
> +#define FS_HIDDEN_FL                   0x10000000 /* Windows hidden file attribute */
> +#define FS_SYSTEM_FL                   0x20000000 /* Windows system file attribute */
> +#define FS_ARCHIVE_FL                  0x40000000 /* Windows archive file attribute */
>  #define FS_RESERVED_FL                 0x80000000 /* reserved for ext2 lib */
> -#define FS_FL_USER_VISIBLE             0x0003DFFF /* User visible flags */
> -#define FS_FL_USER_MODIFIABLE          0x000380FF /* User modifiable flags */
> +#define FS_FL_USER_VISIBLE             0x7003DFFF /* User visible flags */
> +#define FS_FL_USER_MODIFIABLE          0x700380FF /* User modifiable flags */
> --
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