Re: [PATCH 12/13] btrfs-progs: obtain used_bytes in BTRFS_IOC_FS_INFO ioctl

[Anand Jain <Anand.Jain@oracle.com>]

kindly ignore this patch, the feature now is implemented
without adding any _new_ ioctl or _new_ parameters.

Thanks, Anand


On 06/21/2013 03:58 PM, Anand Jain wrote:
> btrfs-progs has to read fs info from the kernel to
> read the latest info instead of reading it from the disks,
> which generally is a stale info after certain critical
> operation.
>
> getting used_bytes parameter will help to fix
>        btrfs filesystem show --kernel
> to show the current info of the fs
>
> Signed-off-by: Anand Jain <anand.jain@oracle.com>
> ---
>   ioctl.h | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/ioctl.h b/ioctl.h
> index a40a4a1..d035201 100644
> --- a/ioctl.h
> +++ b/ioctl.h
> @@ -169,7 +169,8 @@ struct btrfs_ioctl_fs_info_args {
>   	__u64 max_id;				/* out */
>   	__u64 num_devices;			/* out */
>   	__u8 fsid[BTRFS_FSID_SIZE];		/* out */
> -	__u64 reserved[124];			/* pad to 1k */
> +	__u64 used_bytes;			/* out */
> +	__u64 reserved[123];			/* pad to 1k */
>   };
>
>   /* balance control ioctl modes */
>