[PATCH, RFC] put xfs build features into the stats file

[Nathan Scott]

Separate file?  That line uses a comma separator ... differs to
every other line in that stats file, painful for parsers.  And
no risk of breaking anything if its a separate file.

cheers.

----- "Eric Sandeen" <sandeen at sandeen.net> wrote:

> Running xfstests on an xfs build w/o xattrs enabled, I realized
> there's no reliable way to see if the running xfs has various
> features other than debug (which is shown in /proc/fs/xfs/stat)
> 
> What do folks think of adding the BUILD_OPTIONS to this file
> as well?
> 
> # cat /proc/fs/xfs/stat
> extent_alloc 0 0 0 0
> ...
> xpc 0 0 0
> debug 0
> features security attributes, large block numbers, no debug 
> 
> Signed-off-by: Eric Sandeen <sandeen at sandeen.net>
> ---
> 
> Index: linux-2.6/fs/xfs/linux-2.6/xfs_stats.c
> ===================================================================
> --- linux-2.6.orig/fs/xfs/linux-2.6/xfs_stats.c
> +++ linux-2.6/fs/xfs/linux-2.6/xfs_stats.c
> @@ -89,6 +89,8 @@ xfs_read_xfsstats(
>  		0);
>  #endif
>  
> +	len += sprintf(buffer + len, "features " XFS_BUILD_OPTIONS "\n");
> +
>  	if (offset >= len) {
>  		*start = buffer;
>  		*eof = 1;
> 
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-- 
Nathan