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quota: fix a problem about transfer quota

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[ Upstream commit c6d9c35d16 ]

Run below script as root, dquot_add_space will return -EDQUOT since
__dquot_transfer call dquot_add_space with flags=0, and dquot_add_space
think it's a preallocation. Fix it by set flags as DQUOT_SPACE_WARN.

mkfs.ext4 -O quota,project /dev/vdb
mount -o prjquota /dev/vdb /mnt
setquota -P 23 1 1 0 0 /dev/vdb
dd if=/dev/zero of=/mnt/test-file bs=4K count=1
chattr -p 23 test-file

Fixes: 7b9ca4c61b ("quota: Reduce contention on dq_data_lock")
Signed-off-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
yangerkun 2019-03-26 22:00:02 +08:00 committed by Greg Kroah-Hartman
parent 9bd41f5634
commit 8907e1a6bb
1 changed files with 2 additions and 2 deletions
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4
fs/quota/dquot.c
View file

@ -1989,8 +1989,8 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to)
&warn_to[cnt]);
if (ret)
goto over_quota;
ret = dquot_add_space(transfer_to[cnt], cur_space, rsv_space, 0,
&warn_to[cnt]);
ret = dquot_add_space(transfer_to[cnt], cur_space, rsv_space,
DQUOT_SPACE_WARN, &warn_to[cnt]);
if (ret) {
spin_lock(&transfer_to[cnt]->dq_dqb_lock);
dquot_decr_inodes(transfer_to[cnt], inode_usage);