linux-kernel - Re: [f2fs-dev] [PATCH 1/2] f2fs: fix miscounted block limit in f2fs_statfs

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Date:   Tue, 7 Jan 2020 19:28:10 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     Chengguang Xu <cgxu519@...ernel.net>, <jaegeuk@...nel.org>,
        <chao@...nel.org>
CC:     <linux-kernel@...r.kernel.org>,
        <linux-f2fs-devel@...ts.sourceforge.net>
Subject: Re: [f2fs-dev] [PATCH 1/2] f2fs: fix miscounted block limit in
 f2fs_statfs_project()

On 2020/1/4 22:20, Chengguang Xu wrote:
> statfs calculates Total/Used/Avail disk space in block unit,
> so we should translate soft/hard prjquota limit to block unit
> as well.
> 
> Below testing result shows the block/inode numbers of
> Total/Used/Avail from df command are all correct afer
> applying this patch.
> 
> [root@...alhost quota-tools]\# ./repquota -P /dev/sdb1
> *** Report for project quotas on device /dev/sdb1
> Block grace time: 7days; Inode grace time: 7days
>               Block limits                File limits
> Project   used soft    hard  grace  used  soft  hard  grace
> -----------------------------------------------------------
> \#0   --   4       0       0         1     0     0
> \#101 --   0       0       0         2     0     0
> \#102 --   0   10240       0         2    10     0
> \#103 --   0       0   20480         2     0    20
> \#104 --   0   10240   20480         2    10    20
> \#105 --   0   20480   10240         2    20    10
> 
> [root@...alhost sdb1]\# lsattr -p t{1,2,3,4,5}
>   101 ----------------N-- t1/a1
>   102 ----------------N-- t2/a2
>   103 ----------------N-- t3/a3
>   104 ----------------N-- t4/a4
>   105 ----------------N-- t5/a5
> 
> [root@...alhost sdb1]\# df -hi t{1,2,3,4,5}
> Filesystem     Inodes IUsed IFree IUse% Mounted on
> /dev/sdb1        2.4M    21  2.4M    1% /mnt/sdb1
> /dev/sdb1          10     2     8   20% /mnt/sdb1
> /dev/sdb1          20     2    18   10% /mnt/sdb1
> /dev/sdb1          10     2     8   20% /mnt/sdb1
> /dev/sdb1          10     2     8   20% /mnt/sdb1
> 
> [root@...alhost sdb1]\# df -h t{1,2,3,4,5}
> Filesystem      Size  Used Avail Use% Mounted on
> /dev/sdb1        10G  489M  9.6G   5% /mnt/sdb1
> /dev/sdb1        10M     0   10M   0% /mnt/sdb1
> /dev/sdb1        20M     0   20M   0% /mnt/sdb1
> /dev/sdb1        10M     0   10M   0% /mnt/sdb1
> /dev/sdb1        10M     0   10M   0% /mnt/sdb1
> 
> Fixes: 909110c060f2 ("f2fs: choose hardlimit when softlimit is larger than hardlimit in f2fs_statfs_project()")
> Signed-off-by: Chengguang Xu <cgxu519@...ernel.net>

Reviewed-by: Chao Yu <yuchao0@...wei.com>

Thanks,