Re: [PATCH 2/2] f2fs: fix to avoid quota inode leak in ->put_super

From: Chao Yu
Date: Fri Sep 07 2018 - 18:53:44 EST


I can see it in dev, thanks for merging. ;)

On 2018/9/8 6:38, Jaegeuk Kim wrote:
> I merged as one. Please check dev. :)
>
> On 09/06, Chao Yu wrote:
>> generic/019 reports below error:
>>
>> __quota_error: 1160 callbacks suppressed
>> Quota error (device zram1): write_blk: dquota write failed
>> Quota error (device zram1): qtree_write_dquot: Error -28 occurred while creating quota
>> Quota error (device zram1): write_blk: dquota write failed
>> Quota error (device zram1): qtree_write_dquot: Error -28 occurred while creating quota
>> Quota error (device zram1): write_blk: dquota write failed
>> Quota error (device zram1): qtree_write_dquot: Error -28 occurred while creating quota
>> Quota error (device zram1): write_blk: dquota write failed
>> Quota error (device zram1): qtree_write_dquot: Error -28 occurred while creating quota
>> Quota error (device zram1): write_blk: dquota write failed
>> Quota error (device zram1): qtree_write_dquot: Error -28 occurred while creating quota
>> VFS: Busy inodes after unmount of zram1. Self-destruct in 5 seconds. Have a nice day...
>>
>> If we failed in below path due to fail to write dquot block, we will miss
>> to release quota inode, fix it.
>>
>> - f2fs_put_super
>> - f2fs_quota_off_umount
>> - f2fs_quota_off
>> - f2fs_quota_sync <-- failed
>> - dquot_quota_off <-- missed to call
>>
>> Signed-off-by: Chao Yu <yuchao0@xxxxxxxxxx>
>> ---
>> fs/f2fs/super.c | 6 ++++--
>> 1 file changed, 4 insertions(+), 2 deletions(-)
>>
>> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
>> index c026aaccf218..328f58647f4c 100644
>> --- a/fs/f2fs/super.c
>> +++ b/fs/f2fs/super.c
>> @@ -1900,10 +1900,12 @@ void f2fs_quota_off_umount(struct super_block *sb)
>> for (type = 0; type < MAXQUOTAS; type++) {
>> err = f2fs_quota_off(sb, type);
>> if (err) {
>> + int ret = dquot_quota_off(sb, type);
>> +
>> f2fs_msg(sb, KERN_ERR,
>> "Fail to turn off disk quota "
>> - "(type: %d, err: %d), Please "
>> - "run fsck to fix it.", type, err);
>> + "(type: %d, err: %d, ret:%d), Please "
>> + "run fsck to fix it.", type, err, ret);
>> set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
>> }
>> }
>> --
>> 2.18.0.rc1