diff options
Diffstat (limited to 'fs/btrfs/qgroup.c')
| -rw-r--r-- | fs/btrfs/qgroup.c | 46 |
1 files changed, 41 insertions, 5 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index f9fb52e52bb6..f175471da882 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -956,6 +956,7 @@ int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans, struct btrfs_root *quota_root; struct btrfs_qgroup *parent; struct btrfs_qgroup *member; + struct btrfs_qgroup_list *list; int ret = 0; mutex_lock(&fs_info->qgroup_ioctl_lock); @@ -971,6 +972,14 @@ int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans, goto out; } + /* check if such qgroup relation exist firstly */ + list_for_each_entry(list, &member->groups, next_group) { + if (list->group == parent) { + ret = -EEXIST; + goto out; + } + } + ret = add_qgroup_relation_item(trans, quota_root, src, dst); if (ret) goto out; @@ -993,6 +1002,9 @@ int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info, u64 src, u64 dst) { struct btrfs_root *quota_root; + struct btrfs_qgroup *parent; + struct btrfs_qgroup *member; + struct btrfs_qgroup_list *list; int ret = 0; int err; @@ -1003,6 +1015,21 @@ int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans, goto out; } + member = find_qgroup_rb(fs_info, src); + parent = find_qgroup_rb(fs_info, dst); + if (!member || !parent) { + ret = -EINVAL; + goto out; + } + + /* check if such qgroup relation exist firstly */ + list_for_each_entry(list, &member->groups, next_group) { + if (list->group == parent) + goto exist; + } + ret = -ENOENT; + goto out; +exist: ret = del_qgroup_relation_item(trans, quota_root, src, dst); err = del_qgroup_relation_item(trans, quota_root, dst, src); if (err && !ret) @@ -1010,7 +1037,6 @@ int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans, spin_lock(&fs_info->qgroup_lock); del_relation_rb(fs_info, src, dst); - spin_unlock(&fs_info->qgroup_lock); out: mutex_unlock(&fs_info->qgroup_ioctl_lock); @@ -1030,8 +1056,15 @@ int btrfs_create_qgroup(struct btrfs_trans_handle *trans, ret = -EINVAL; goto out; } + qgroup = find_qgroup_rb(fs_info, qgroupid); + if (qgroup) { + ret = -EEXIST; + goto out; + } ret = add_qgroup_item(trans, quota_root, qgroupid); + if (ret) + goto out; spin_lock(&fs_info->qgroup_lock); qgroup = add_qgroup_rb(fs_info, qgroupid); @@ -1058,15 +1091,18 @@ int btrfs_remove_qgroup(struct btrfs_trans_handle *trans, goto out; } - /* check if there are no relations to this qgroup */ qgroup = find_qgroup_rb(fs_info, qgroupid); - if (qgroup) { - if (!list_empty(&qgroup->groups) || !list_empty(&qgroup->members)) { + if (!qgroup) { + ret = -ENOENT; + goto out; + } else { + /* check if there are no relations to this qgroup */ + if (!list_empty(&qgroup->groups) || + !list_empty(&qgroup->members)) { ret = -EBUSY; goto out; } } - ret = del_qgroup_item(trans, quota_root, qgroupid); spin_lock(&fs_info->qgroup_lock); |