linux-kernel - Re: [PATCH v4 2/3] btrfs: qgroup: introduce btrfs_update_quoto

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Date:   Tue, 15 Nov 2022 18:33:42 +0100
From:   David Sterba <dsterba@...e.cz>
To:     ChenXiaoSong <chenxiaosong2@...wei.com>
Cc:     clm@...com, josef@...icpanda.com, dsterba@...e.com,
        linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        zhangxiaoxu5@...wei.com, yanaijie@...wei.com,
        quwenruo.btrfs@....com, wqu@...e.com
Subject: Re: [PATCH v4 2/3] btrfs: qgroup: introduce
 btrfs_update_quoto_limit() helper

On Wed, Nov 16, 2022 at 01:17:08AM +0800, ChenXiaoSong wrote:
> No functional changed. Just simplify the code.

Please write some description of the change, like "factor out quota
limit update that also marks qgroup as inconsistent if it fals".

> Signed-off-by: ChenXiaoSong <chenxiaosong2@...wei.com>
> ---
>  fs/btrfs/qgroup.c | 34 +++++++++++++++++-----------------
>  1 file changed, 17 insertions(+), 17 deletions(-)
> 
> diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
> index d0480b9c6c86..ca609a70d067 100644
> --- a/fs/btrfs/qgroup.c
> +++ b/fs/btrfs/qgroup.c
> @@ -1677,6 +1677,19 @@ int btrfs_remove_qgroup(struct btrfs_trans_handle *trans, u64 qgroupid)
>  	return ret;
>  }
>  
> +static int btrfs_update_quoto_limit(struct btrfs_trans_handle *trans,

Typo 'quoto' and it should rather be qgroup as the limit is related to a
qgroup, quota is usually in connection with the whole subsystem.

> +				    struct btrfs_qgroup *qgroup,
> +				    struct btrfs_fs_info *fs_info)
> +{
> +	int ret = update_qgroup_limit_item(trans, qgroup);
> +	if (ret) {
> +		qgroup_mark_inconsistent(fs_info);
> +		btrfs_info(fs_info, "unable to update quota limit for %llu",
> +			   qgroup->qgroupid);
> +	}
> +	return ret;
> +}
> +
>  int btrfs_limit_qgroup(struct btrfs_trans_handle *trans, u64 qgroupid,
>  		       struct btrfs_qgroup_limit *limit)
>  {
> @@ -1742,13 +1755,7 @@ int btrfs_limit_qgroup(struct btrfs_trans_handle *trans, u64 qgroupid,
>  
>  	spin_unlock(&fs_info->qgroup_lock);
>  
> -	ret = update_qgroup_limit_item(trans, qgroup);
> -	if (ret) {
> -		qgroup_mark_inconsistent(fs_info);
> -		btrfs_info(fs_info, "unable to update quota limit for %llu",
> -		       qgroupid);
> -	}
> -
> +	ret = btrfs_update_quoto_limit(trans, qgroup, fs_info);
>  out:
>  	mutex_unlock(&fs_info->qgroup_ioctl_lock);
>  	return ret;
> @@ -2824,9 +2831,7 @@ int btrfs_run_qgroups(struct btrfs_trans_handle *trans)
>  		ret = update_qgroup_info_item(trans, qgroup);
>  		if (ret)
>  			qgroup_mark_inconsistent(fs_info);
> -		ret = update_qgroup_limit_item(trans, qgroup);
> -		if (ret)
> -			qgroup_mark_inconsistent(fs_info);
> +		ret = btrfs_update_quoto_limit(trans, qgroup, fs_info);
>  		spin_lock(&fs_info->qgroup_lock);
>  	}
>  	if (test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
> @@ -2953,14 +2958,9 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, u64 srcid,
>  		dstgroup->rsv_rfer = inherit->lim.rsv_rfer;
>  		dstgroup->rsv_excl = inherit->lim.rsv_excl;
>  
> -		ret = update_qgroup_limit_item(trans, dstgroup);
> -		if (ret) {
> -			qgroup_mark_inconsistent(fs_info);
> -			btrfs_info(fs_info,
> -				   "unable to update quota limit for %llu",
> -				   dstgroup->qgroupid);
> +		ret = btrfs_update_quoto_limit(trans, dstgroup, fs_info);
> +		if (ret)
>  			goto unlock;
> -		}
>  	}
>  
>  	if (srcid) {
> -- 
> 2.31.1
>