- struct uuid_nid_data *data, *entry;
- int nob = strnlen (uuid, CFS_PAGE_SIZE) + 1;
- int found = 0;
-
- LASSERT(nid != 0); /* valid newconfig NID is never zero */
-
- if (nob > CFS_PAGE_SIZE)
- return -EINVAL;
-
- OBD_ALLOC(data, sizeof(*data));
- if (data == NULL)
- return -ENOMEM;
-
- OBD_ALLOC(data->un_uuid, nob);
- if (data == NULL) {
- OBD_FREE(data, sizeof(*data));
- return -ENOMEM;
- }
-
- memcpy(data->un_uuid, uuid, nob);
- data->un_nid = nid;
- data->un_count = 1;
-
- spin_lock (&g_uuid_lock);
- list_for_each_entry(entry, &g_uuid_list, un_list) {
- if (entry->un_nid == nid &&
- (strcmp(entry->un_uuid, uuid) == 0)) {
- found++;
- entry->un_count++;
- break;
- }
- }
- if (!found)
- list_add(&data->un_list, &g_uuid_list);
- spin_unlock (&g_uuid_lock);
-
- if (found) {
- CDEBUG(D_INFO, "found uuid %s %s cnt=%d\n", uuid,
- libcfs_nid2str(nid), entry->un_count);
- OBD_FREE(data->un_uuid, nob);
- OBD_FREE(data, sizeof(*data));
- } else {
- CDEBUG(D_INFO, "add uuid %s %s\n", uuid, libcfs_nid2str(nid));
- }
- return 0;
+ struct uuid_nid_data *data;
+ struct list_head deathrow;
+
+ INIT_LIST_HEAD(&deathrow);
+
+ spin_lock(&g_uuid_lock);
+ if (uuid != NULL) {
+ struct obd_uuid tmp;
+
+ obd_str2uuid(&tmp, uuid);
+ list_for_each_entry(data, &g_uuid_list, un_list) {
+ if (obd_uuid_equals(&data->un_uuid, &tmp)) {
+ list_move(&data->un_list, &deathrow);
+ break;
+ }
+ }
+ } else
+ list_splice_init(&g_uuid_list, &deathrow);
+ spin_unlock(&g_uuid_lock);
+
+ if (uuid != NULL && list_empty(&deathrow)) {
+ CDEBUG(D_INFO, "Try to delete a non-existent uuid %s\n", uuid);
+ return -EINVAL;
+ }
+
+ while (!list_empty(&deathrow)) {
+ data = list_entry(deathrow.next, struct uuid_nid_data,
+ un_list);
+ list_del(&data->un_list);
+
+ CDEBUG(D_INFO, "del uuid %s %s/%d\n",
+ obd_uuid2str(&data->un_uuid),
+ libcfs_nid2str(data->un_nids[0]),
+ data->un_nid_count);
+
+ OBD_FREE(data, sizeof(*data));
+ }
+ return 0;