Re: [PATCH v2 16/23] xfs: add inode on-disk VERITY flag

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Hi Andrey,

On Tue, Apr 04, 2023 at 04:53:12PM +0200, Andrey Albershteyn wrote:
> Add flag to mark inodes which have fs-verity enabled on them (i.e.
> descriptor exist and tree is built).
> 
> Signed-off-by: Andrey Albershteyn <aalbersh@xxxxxxxxxx>
> ---
>  fs/ioctl.c                 | 4 ++++
>  fs/xfs/libxfs/xfs_format.h | 4 +++-
>  fs/xfs/xfs_inode.c         | 2 ++
>  fs/xfs/xfs_iops.c          | 2 ++
>  include/uapi/linux/fs.h    | 1 +
>  5 files changed, 12 insertions(+), 1 deletion(-)
[...]
> diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
> index b7b56871029c..5172a2eb902c 100644
> --- a/include/uapi/linux/fs.h
> +++ b/include/uapi/linux/fs.h
> @@ -140,6 +140,7 @@ struct fsxattr {
>  #define FS_XFLAG_FILESTREAM	0x00004000	/* use filestream allocator */
>  #define FS_XFLAG_DAX		0x00008000	/* use DAX for IO */
>  #define FS_XFLAG_COWEXTSIZE	0x00010000	/* CoW extent size allocator hint */
> +#define FS_XFLAG_VERITY		0x00020000	/* fs-verity sealed inode */
>  #define FS_XFLAG_HASATTR	0x80000000	/* no DIFLAG for this	*/
>  

I don't think "xfs: add inode on-disk VERITY flag" is an accurate description of
a patch that involves adding something to the UAPI.

Should the other filesystems support this new flag too?

I'd also like all ways of getting the verity flag to continue to be mentioned in
Documentation/filesystems/fsverity.rst.  The existing methods (FS_IOC_GETFLAGS
and statx) are already mentioned there.

- Eric



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