linux-ext4 - generic quota vs xfs quota

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Date:   Thu, 26 Apr 2018 16:16:08 +0800
From:   Liu Bo <obuil.liubo@...il.com>
To:     linux-ext4@...r.kernel.org
Subject: generic quota vs xfs quota

I got a quick question about quota,

Hi,

typedef struct xfs_dquot {

    xfs_qcnt_t       q_res_bcount;  /* total regular nblks used+reserved */

};

while the generic quota used by ext4/ocfs2,

struct mem_dqblk {

        qsize_t dqb_curspace;   /* current used space */

        qsize_t dqb_rsvspace;   /* current reserved space for delalloc*/


};

and ext4 ->statfs() only displays dqb_curspace while xfs ->statfs()
displays both,

Q1: is it a ext4 bug?
Q2: I didn't see the code where rsv_space is converted to used space,
am I missing anything?


thanks,
liubo
thanks,
liubo