diff options
| author | Wang Shilong <wangsl-fnst@cn.fujitsu.com> | 2013-04-15 12:56:49 +0000 |
|---|---|---|
| committer | Josef Bacik <jbacik@fusionio.com> | 2013-05-06 15:54:51 -0400 |
| commit | b4fcd6be6bbd702ae1a6545c9b413681850a9814 (patch) | |
| tree | 88910f7224a4c0de59809fda2f8599d0a6703305 /fs | |
| parent | e36902d4cc95382771f501f8d1d8c0a9b356500d (diff) | |
Btrfs: fix confusing edquot happening case
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 exclusive
is negative,but user can not continue to write data! a workaround
way is to cast u64 to s64 when doing qgroup reservation.
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Reviewed-by: Arne Jansen <sensille@gmx.net>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | 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 e089fc10848..4beea047f4e 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -1616,14 +1616,14 @@ 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 + (s64)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 + (s64)qg->excl + num_bytes > qg->max_excl) { ret = -EDQUOT; goto out; |