return n_old_qgroups;
r = btrfs_subvol_get_parent(fd, old_subvol_id, &old_parent_id);
- if (r < 0)
+ if (r == -ENXIO)
+ /* We have no parent, hence nothing to copy. */
+ n_old_parent_qgroups = 0;
+ else if (r < 0)
return r;
-
- n_old_parent_qgroups = btrfs_qgroup_find_parents(fd, old_parent_id, &old_parent_qgroups);
- if (n_old_parent_qgroups < 0)
- return n_old_parent_qgroups;
+ else {
+ n_old_parent_qgroups = btrfs_qgroup_find_parents(fd, old_parent_id, &old_parent_qgroups);
+ if (n_old_parent_qgroups < 0)
+ return n_old_parent_qgroups;
+ }
for (i = 0; i < n_old_qgroups; i++) {
uint64_t id;
if (n > 0) /* already parent qgroups set up, let's bail */
return 0;
+ qgroups = mfree(qgroups);
+
r = btrfs_subvol_get_parent(fd, subvol_id, &parent_subvol);
- if (r < 0)
+ if (r == -ENXIO)
+ /* No parent, hence no qgroup memberships */
+ n = 0;
+ else if (r < 0)
return r;
-
- qgroups = mfree(qgroups);
- n = btrfs_qgroup_find_parents(fd, parent_subvol, &qgroups);
- if (n < 0)
- return n;
+ else {
+ n = btrfs_qgroup_find_parents(fd, parent_subvol, &qgroups);
+ if (n < 0)
+ return n;
+ }
if (insert_intermediary_qgroup) {
uint64_t lowest = 256, new_qgroupid;