1053 static int check_flags(struct bpf_htab *htab, struct htab_elem *l_old,  in check_flags()  argument
1056 	if (l_old && (map_flags & ~BPF_F_LOCK) == BPF_NOEXIST)  in check_flags()
1060 	if (!l_old && (map_flags & ~BPF_F_LOCK) == BPF_EXIST)  in check_flags()
1072 	struct htab_elem *l_new = NULL, *l_old;  in htab_map_update_elem()  local
1097 		l_old = lookup_nulls_elem_raw(head, hash, key, key_size,  in htab_map_update_elem()
1099 		ret = check_flags(htab, l_old, map_flags);  in htab_map_update_elem()
1102 		if (l_old) {  in htab_map_update_elem()
1105 					      l_old->key + round_up(key_size, 8),  in htab_map_update_elem()
1119 	l_old = lookup_elem_raw(head, hash, key, key_size);  in htab_map_update_elem()
1121 	ret = check_flags(htab, l_old, map_flags);  in htab_map_update_elem()
1125 	if (unlikely(l_old && (map_flags & BPF_F_LOCK))) {  in htab_map_update_elem()
1133 				      l_old->key + round_up(key_size, 8),  in htab_map_update_elem()
1140 				l_old);  in htab_map_update_elem()
1151 	if (l_old) {  in htab_map_update_elem()
1152 		hlist_nulls_del_rcu(&l_old->hash_node);  in htab_map_update_elem()
1154 			free_htab_elem(htab, l_old);  in htab_map_update_elem()
1156 			check_and_free_fields(htab, l_old);  in htab_map_update_elem()
1174 	struct htab_elem *l_new, *l_old = NULL;  in htab_lru_map_update_elem()  local
1210 	l_old = lookup_elem_raw(head, hash, key, key_size);  in htab_lru_map_update_elem()
1212 	ret = check_flags(htab, l_old, map_flags);  in htab_lru_map_update_elem()
1220 	if (l_old) {  in htab_lru_map_update_elem()
1222 		hlist_nulls_del_rcu(&l_old->hash_node);  in htab_lru_map_update_elem()
1231 	else if (l_old)  in htab_lru_map_update_elem()
1232 		htab_lru_push_free(htab, l_old);  in htab_lru_map_update_elem()
1242 	struct htab_elem *l_new = NULL, *l_old;  in __htab_percpu_map_update_elem()  local
1267 	l_old = lookup_elem_raw(head, hash, key, key_size);  in __htab_percpu_map_update_elem()
1269 	ret = check_flags(htab, l_old, map_flags);  in __htab_percpu_map_update_elem()
1273 	if (l_old) {  in __htab_percpu_map_update_elem()
1275 		pcpu_copy_value(htab, htab_elem_get_ptr(l_old, key_size),  in __htab_percpu_map_update_elem()
1297 	struct htab_elem *l_new = NULL, *l_old;  in __htab_lru_percpu_map_update_elem()  local
1333 	l_old = lookup_elem_raw(head, hash, key, key_size);  in __htab_lru_percpu_map_update_elem()
1335 	ret = check_flags(htab, l_old, map_flags);  in __htab_lru_percpu_map_update_elem()
1339 	if (l_old) {  in __htab_lru_percpu_map_update_elem()
1340 		bpf_lru_node_set_ref(&l_old->lru_node);  in __htab_lru_percpu_map_update_elem()
1343 		pcpu_copy_value(htab, htab_elem_get_ptr(l_old, key_size),  in __htab_lru_percpu_map_update_elem()