1056 static int check_flags(struct bpf_htab *htab, struct htab_elem *l_old,  in check_flags()  argument
1059 	if (l_old && (map_flags & ~BPF_F_LOCK) == BPF_NOEXIST)  in check_flags()
1063 	if (!l_old && (map_flags & ~BPF_F_LOCK) == BPF_EXIST)  in check_flags()
1075 	struct htab_elem *l_new = NULL, *l_old;  in htab_map_update_elem()  local
1101 		l_old = lookup_nulls_elem_raw(head, hash, key, key_size,  in htab_map_update_elem()
1103 		ret = check_flags(htab, l_old, map_flags);  in htab_map_update_elem()
1106 		if (l_old) {  in htab_map_update_elem()
1109 					      l_old->key + round_up(key_size, 8),  in htab_map_update_elem()
1123 	l_old = lookup_elem_raw(head, hash, key, key_size);  in htab_map_update_elem()
1125 	ret = check_flags(htab, l_old, map_flags);  in htab_map_update_elem()
1129 	if (unlikely(l_old && (map_flags & BPF_F_LOCK))) {  in htab_map_update_elem()
1137 				      l_old->key + round_up(key_size, 8),  in htab_map_update_elem()
1144 				l_old);  in htab_map_update_elem()
1155 	if (l_old) {  in htab_map_update_elem()
1156 		hlist_nulls_del_rcu(&l_old->hash_node);  in htab_map_update_elem()
1166 				old_map_ptr = fd_htab_map_get_ptr(map, l_old);  in htab_map_update_elem()
1167 			check_and_free_fields(htab, l_old);  in htab_map_update_elem()
1171 	if (l_old) {  in htab_map_update_elem()
1175 			free_htab_elem(htab, l_old);  in htab_map_update_elem()
1194 	struct htab_elem *l_new, *l_old = NULL;  in htab_lru_map_update_elem()  local
1230 	l_old = lookup_elem_raw(head, hash, key, key_size);  in htab_lru_map_update_elem()
1232 	ret = check_flags(htab, l_old, map_flags);  in htab_lru_map_update_elem()
1240 	if (l_old) {  in htab_lru_map_update_elem()
1242 		hlist_nulls_del_rcu(&l_old->hash_node);  in htab_lru_map_update_elem()
1252 	else if (l_old)  in htab_lru_map_update_elem()
1253 		htab_lru_push_free(htab, l_old);  in htab_lru_map_update_elem()
1263 	struct htab_elem *l_new = NULL, *l_old;  in __htab_percpu_map_update_elem()  local
1288 	l_old = lookup_elem_raw(head, hash, key, key_size);  in __htab_percpu_map_update_elem()
1290 	ret = check_flags(htab, l_old, map_flags);  in __htab_percpu_map_update_elem()
1294 	if (l_old) {  in __htab_percpu_map_update_elem()
1296 		pcpu_copy_value(htab, htab_elem_get_ptr(l_old, key_size),  in __htab_percpu_map_update_elem()
1318 	struct htab_elem *l_new = NULL, *l_old;  in __htab_lru_percpu_map_update_elem()  local
1354 	l_old = lookup_elem_raw(head, hash, key, key_size);  in __htab_lru_percpu_map_update_elem()
1356 	ret = check_flags(htab, l_old, map_flags);  in __htab_lru_percpu_map_update_elem()
1360 	if (l_old) {  in __htab_lru_percpu_map_update_elem()
1361 		bpf_lru_node_set_ref(&l_old->lru_node);  in __htab_lru_percpu_map_update_elem()
1364 		pcpu_copy_value(htab, htab_elem_get_ptr(l_old, key_size),  in __htab_lru_percpu_map_update_elem()