linux-ext4 - Re: [PATCH 1/4] Adds general codes to enforces project quota limits

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Message-ID: <20140930200721.GA6593@quack.suse.cz>
Date:	Tue, 30 Sep 2014 22:07:21 +0200
From:	Jan Kara <jack@...e.cz>
To:	Li Xi <pkuelelixi@...il.com>
Cc:	linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
	linux-api@...r.kernel.org, tytso@....edu, adilger@...ger.ca,
	jack@...e.cz, viro@...iv.linux.org.uk, hch@...radead.org,
	dmonakhov@...nvz.org
Subject: Re: [PATCH 1/4] Adds general codes to enforces project quota limits

On Wed 24-09-14 22:04:27, Li Xi wrote:
> @@ -1413,6 +1416,15 @@ static void __dquot_initialize(struct inode *inode, int type)
>  		case GRPQUOTA:
>  			qid = make_kqid_gid(inode->i_gid);
>  			break;
> +		case PRJQUOTA:
> +			/* Project ID is not supported */
> +			if (!inode->i_sb->dq_op->get_projid)
> +				continue;
> +			rc = inode->i_sb->dq_op->get_projid(inode, &projid);
> +			if (rc)
> +				continue;
> +			qid = make_kqid_projid(projid);
> +			break;
  I realized one more thing: We don't want to check ->get_projid() here.
Rather we should check ->get_projid() when turning quota on in
quota_quotaon() and return -EINVAL when ->get_projid() isn't set - that way
user is early notified the fs doesn't support project quotas. Then here
in __dquot_initialize() we can just check sb_has_quota_active(sb, PRJQUOTA).

								Honza
-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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