linux-kernel - Re: [PATCH] ext4: report delalloc reserve as non-free in statfs mangled by project quota

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Date:   Tue, 6 Feb 2018 14:46:49 +0100
From:   Jan Kara <jack@...e.cz>
To:     Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
Cc:     Andreas Dilger <adilger.kernel@...ger.ca>,
        linux-ext4@...r.kernel.org, Theodore Ts'o <tytso@....edu>,
        linux-kernel@...r.kernel.org,
        Dmitry Monakhov <dmonakhov@...nvz.org>, Li Xi <lixi@....com>,
        Jan Kara <jack@...e.cz>
Subject: Re: [PATCH] ext4: report delalloc reserve as non-free in statfs
 mangled by project quota

On Fri 02-02-18 13:40:05, Konstantin Khlebnikov wrote:
> This reserved space isn't committed yet but cannot be used for allocations.
> For userspace it has no difference from used space. XFS already does this.
> 
> Signed-off-by: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
> Fixes: 689c958cbe6b ("ext4: add project quota support")

The patch looks good. You can add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

> ---
>  fs/ext4/super.c |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
> index 5de959fb0244..13ce97b9e820 100644
> --- a/fs/ext4/super.c
> +++ b/fs/ext4/super.c
> @@ -5227,7 +5227,8 @@ static int ext4_statfs_project(struct super_block *sb,
>  		 dquot->dq_dqb.dqb_bsoftlimit :
>  		 dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits;
>  	if (limit && buf->f_blocks > limit) {
> -		curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits;
> +		curblock = (dquot->dq_dqb.dqb_curspace +
> +			    dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
>  		buf->f_blocks = limit;
>  		buf->f_bfree = buf->f_bavail =
>  			(buf->f_blocks > curblock) ?
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR