Re: [PATCH] btrfs: cleanup btrfs_balance profile validity checks

[David Sterba <dsterba@suse.cz>]

On Sun, Aug 30, 2015 at 09:45:49PM +0000, Alexandru Moise wrote:
> Improve readability by generalizing the profile validity checks,
> I had to read through those if statements half a dozen times on my
> first try just to get an idea of what's happening there.
> 
> Signed-off-by: Alexandru Moise <00moses.alexander00@gmail.com>
> ---
>  fs/btrfs/volumes.c | 21 ++++++++++++---------
>  1 file changed, 12 insertions(+), 9 deletions(-)
> 
> diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
> index fbe7c10..d23bc26 100644
> --- a/fs/btrfs/volumes.c
> +++ b/fs/btrfs/volumes.c
> @@ -3454,6 +3454,15 @@ static void __cancel_balance(struct btrfs_fs_info *fs_info)
>  	atomic_set(&fs_info->mutually_exclusive_operation_running, 0);
>  }
>  
> +/* Non-zero return value signifies invalidity */
> +static inline int balance_relocate_invalid(struct btrfs_balance_args *bctl_arg,

The function name is not very descriptive, I'd pick something like
validate_convert_profile, otherwise ok.