Step to reproduce:
mkfs.btrfs <disk>
mount <disk> <mnt>
dd if=/dev/zero of=/<mnt>/data bs=1M count=10
sync
btrfs quota enable <mnt>
btrfs qgroup create 0/5 <mnt>
btrfs qgroup limit 5M 0/5 <mnt>
rm -f /<mnt>/data
sync
btrfs qgroup show <mnt>
dd if=/dev/zero of=data bs=1M count=1
>From the perspective of users, qgroup's referenced or referenced
is negative,But user can not continue to write data! a workaround
way is to cast u64 to int64 when doing qgroup reservation.
Signed-off-by: Wang Shilong <wangsl-f...@cn.fujitsu.com>
---
This confusing edquot may also happen after Jan's qgroup
rescan has been implemented.
---
fs/btrfs/qgroup.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index b44124d..0178223 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -1523,14 +1523,14 @@ int btrfs_qgroup_reserve(struct btrfs_root *root, u64
num_bytes)
qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux;
if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_RFER) &&
- qg->reserved + qg->rfer + num_bytes >
+ qg->reserved + (signed long long)qg->rfer + num_bytes >
qg->max_rfer) {
ret = -EDQUOT;
goto out;
}
if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_EXCL) &&
- qg->reserved + qg->excl + num_bytes >
+ qg->reserved + (signed long long)qg->excl + num_bytes >
qg->max_excl) {
ret = -EDQUOT;
goto out;
--
1.7.7.6
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
