[Trusty][Saucy][Raring][Quantal][Precise][PATCH 1/1] (no-up) overlayfs: add OVERLAYFS_SUPER_MAGIC to include/uapi/linux/magic.h

[Stefan Bader]

On 04.11.2013 17:44, Joseph Salisbury wrote:
> BugLink: http://bugs.launchpad.net/bugs/1247769
> 
> Signed-off-by: Joseph Salisbury <joseph.salisbury at canonical.com>
> ---
>  include/uapi/linux/magic.h |    1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/include/uapi/linux/magic.h b/include/uapi/linux/magic.h
> index 2944278..7993c79 100644
> --- a/include/uapi/linux/magic.h
> +++ b/include/uapi/linux/magic.h
> @@ -31,6 +31,7 @@
>  #define PSTOREFS_MAGIC		0x6165676C
>  #define EFIVARFS_MAGIC		0xde5e81e4
>  #define HOSTFS_SUPER_MAGIC	0x00c0ffee
> +#define OVERLAYFS_SUPER_MAGIC	0x794c764f
>  
>  #define MINIX_SUPER_MAGIC	0x137F		/* minix v1 fs, 14 char names */
>  #define MINIX_SUPER_MAGIC2	0x138F		/* minix v1 fs, 30 char names */
> 

I wished the bug report would be helpful in a way to say which other piece of sw
would like that define in magic.h.
It probably works as band-aid but I wonder whether it would be cleaner to remove
the define from fs/overlayfs/super.c and include magic.h instead (to have only
one define and in the same place)

-Stefan

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