1177 	struct ceph_snapid_map *sm, *exist;  in ceph_get_snapid_map()  local
1204 	sm = kmalloc(sizeof(*sm), GFP_NOFS);  in ceph_get_snapid_map()
1205 	if (!sm)  in ceph_get_snapid_map()
1208 	ret = get_anon_bdev(&sm->dev);  in ceph_get_snapid_map()
1210 		kfree(sm);  in ceph_get_snapid_map()
1214 	INIT_LIST_HEAD(&sm->lru);  in ceph_get_snapid_map()
1215 	atomic_set(&sm->ref, 1);  in ceph_get_snapid_map()
1216 	sm->snap = snap;  in ceph_get_snapid_map()
1237 		rb_link_node(&sm->node, parent, p);  in ceph_get_snapid_map()
1238 		rb_insert_color(&sm->node, &mdsc->snapid_map_tree);  in ceph_get_snapid_map()
1242 		free_anon_bdev(sm->dev);  in ceph_get_snapid_map()
1243 		kfree(sm);  in ceph_get_snapid_map()
1250 	     sm->snap, sm->dev);  in ceph_get_snapid_map()
1251 	return sm;  in ceph_get_snapid_map()
1255 			 struct ceph_snapid_map *sm)  in ceph_put_snapid_map()  argument
1257 	if (!sm)  in ceph_put_snapid_map()
1259 	if (atomic_dec_and_lock(&sm->ref, &mdsc->snapid_map_lock)) {  in ceph_put_snapid_map()
1260 		if (!RB_EMPTY_NODE(&sm->node)) {  in ceph_put_snapid_map()
1261 			sm->last_used = jiffies;  in ceph_put_snapid_map()
1262 			list_add_tail(&sm->lru, &mdsc->snapid_map_lru);  in ceph_put_snapid_map()
1268 			kfree(sm);  in ceph_put_snapid_map()
1275 	struct ceph_snapid_map *sm;  in ceph_trim_snapid_map()  local
1283 		sm = list_first_entry(&mdsc->snapid_map_lru,  in ceph_trim_snapid_map()
1285 		if (time_after(sm->last_used + CEPH_SNAPID_MAP_TIMEOUT, now))  in ceph_trim_snapid_map()
1288 		rb_erase(&sm->node, &mdsc->snapid_map_tree);  in ceph_trim_snapid_map()
1289 		list_move(&sm->lru, &to_free);  in ceph_trim_snapid_map()
1294 		sm = list_first_entry(&to_free, struct ceph_snapid_map, lru);  in ceph_trim_snapid_map()
1295 		list_del(&sm->lru);  in ceph_trim_snapid_map()
1296 		dout("trim snapid map %llx -> %x\n", sm->snap, sm->dev);  in ceph_trim_snapid_map()
1297 		free_anon_bdev(sm->dev);  in ceph_trim_snapid_map()
1298 		kfree(sm);  in ceph_trim_snapid_map()
1304 	struct ceph_snapid_map *sm;  in ceph_cleanup_snapid_map()  local
1310 		sm = rb_entry(p, struct ceph_snapid_map, node);  in ceph_cleanup_snapid_map()
1313 		list_move(&sm->lru, &to_free);  in ceph_cleanup_snapid_map()
1318 		sm = list_first_entry(&to_free, struct ceph_snapid_map, lru);  in ceph_cleanup_snapid_map()
1319 		list_del(&sm->lru);  in ceph_cleanup_snapid_map()
1320 		free_anon_bdev(sm->dev);  in ceph_cleanup_snapid_map()
1321 		if (WARN_ON_ONCE(atomic_read(&sm->ref))) {  in ceph_cleanup_snapid_map()
1323 			       sm->snap, sm->dev);  in ceph_cleanup_snapid_map()
1325 		kfree(sm);  in ceph_cleanup_snapid_map()