105 static inline struct hlist_head *dev_map_index_hash(struct bpf_dtab *dtab,  in dev_map_index_hash()  argument
108 	return &dtab->dev_index_head[idx & (dtab->n_buckets - 1)];  in dev_map_index_hash()
136 static int dev_map_init_map(struct bpf_dtab *dtab, union bpf_attr *attr)  in dev_map_init_map()  argument
142 	bpf_map_init_from_attr(&dtab->map, attr);  in dev_map_init_map()
146 		dtab->n_buckets = roundup_pow_of_two(dtab->map.max_entries);  in dev_map_init_map()
147 		dtab->dev_index_head = dev_map_create_hash(dtab->n_buckets,  in dev_map_init_map()
148 							   dtab->map.numa_node);  in dev_map_init_map()
149 		if (!dtab->dev_index_head)  in dev_map_init_map()
152 		spin_lock_init(&dtab->index_lock);  in dev_map_init_map()
154 		dtab->netdev_map = bpf_map_area_alloc((u64) dtab->map.max_entries *  in dev_map_init_map()
156 						      dtab->map.numa_node);  in dev_map_init_map()
157 		if (!dtab->netdev_map)  in dev_map_init_map()
166 	struct bpf_dtab *dtab;  in dev_map_alloc()  local
169 	dtab = bpf_map_area_alloc(sizeof(*dtab), NUMA_NO_NODE);  in dev_map_alloc()
170 	if (!dtab)  in dev_map_alloc()
173 	err = dev_map_init_map(dtab, attr);  in dev_map_alloc()
175 		bpf_map_area_free(dtab);  in dev_map_alloc()
180 	list_add_tail_rcu(&dtab->list, &dev_map_list);  in dev_map_alloc()
183 	return &dtab->map;  in dev_map_alloc()
188 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_free()  local
202 	list_del_rcu(&dtab->list);  in dev_map_free()
218 	if (dtab->map.map_type == BPF_MAP_TYPE_DEVMAP_HASH) {  in dev_map_free()
219 		for (i = 0; i < dtab->n_buckets; i++) {  in dev_map_free()
224 			head = dev_map_index_hash(dtab, i);  in dev_map_free()
235 		bpf_map_area_free(dtab->dev_index_head);  in dev_map_free()
237 		for (i = 0; i < dtab->map.max_entries; i++) {  in dev_map_free()
240 			dev = rcu_dereference_raw(dtab->netdev_map[i]);  in dev_map_free()
250 		bpf_map_area_free(dtab->netdev_map);  in dev_map_free()
253 	bpf_map_area_free(dtab);  in dev_map_free()
258 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_get_next_key()  local
262 	if (index >= dtab->map.max_entries) {  in dev_map_get_next_key()
267 	if (index == dtab->map.max_entries - 1)  in dev_map_get_next_key()
279 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in __dev_map_hash_lookup_elem()  local
280 	struct hlist_head *head = dev_map_index_hash(dtab, key);  in __dev_map_hash_lookup_elem()
284 				 lockdep_is_held(&dtab->index_lock))  in __dev_map_hash_lookup_elem()
294 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_hash_get_next_key()  local
317 	i = idx & (dtab->n_buckets - 1);  in dev_map_hash_get_next_key()
321 	for (; i < dtab->n_buckets; i++) {  in dev_map_hash_get_next_key()
322 		head = dev_map_index_hash(dtab, i);  in dev_map_hash_get_next_key()
447 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in __dev_map_lookup_elem()  local
453 	obj = rcu_dereference_check(dtab->netdev_map[key],  in __dev_map_lookup_elem()
625 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_enqueue_multi()  local
644 			dst = rcu_dereference_check(dtab->netdev_map[i],  in dev_map_enqueue_multi()
665 		for (i = 0; i < dtab->n_buckets; i++) {  in dev_map_enqueue_multi()
666 			head = dev_map_index_hash(dtab, i);  in dev_map_enqueue_multi()
668 						 lockdep_is_held(&dtab->index_lock)) {  in dev_map_enqueue_multi()
746 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_redirect_multi()  local
766 			dst = rcu_dereference_check(dtab->netdev_map[i],  in dev_map_redirect_multi()
788 		for (i = 0; i < dtab->n_buckets; i++) {  in dev_map_redirect_multi()
789 			head = dev_map_index_hash(dtab, i);  in dev_map_redirect_multi()
846 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_delete_elem()  local
853 	old_dev = unrcu_pointer(xchg(&dtab->netdev_map[k], NULL));  in dev_map_delete_elem()
856 		atomic_dec((atomic_t *)&dtab->items);  in dev_map_delete_elem()
863 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_hash_delete_elem()  local
869 	spin_lock_irqsave(&dtab->index_lock, flags);  in dev_map_hash_delete_elem()
873 		dtab->items--;  in dev_map_hash_delete_elem()
878 	spin_unlock_irqrestore(&dtab->index_lock, flags);  in dev_map_hash_delete_elem()
884 						    struct bpf_dtab *dtab,  in __dev_map_alloc_node()  argument
891 	dev = bpf_map_kmalloc_node(&dtab->map, sizeof(*dev),  in __dev_map_alloc_node()
893 				   dtab->map.numa_node);  in __dev_map_alloc_node()
907 		    !bpf_prog_map_compatible(&dtab->map, prog))  in __dev_map_alloc_node()
934 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in __dev_map_update_elem()  local
941 	if (unlikely(i >= dtab->map.max_entries))  in __dev_map_update_elem()
955 		dev = __dev_map_alloc_node(net, dtab, &val, i);  in __dev_map_update_elem()
964 	old_dev = unrcu_pointer(xchg(&dtab->netdev_map[i], RCU_INITIALIZER(dev)));  in __dev_map_update_elem()
968 		atomic_inc((atomic_t *)&dtab->items);  in __dev_map_update_elem()
983 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in __dev_map_hash_update_elem()  local
996 	spin_lock_irqsave(&dtab->index_lock, flags);  in __dev_map_hash_update_elem()
1002 	dev = __dev_map_alloc_node(net, dtab, &val, idx);  in __dev_map_hash_update_elem()
1011 		if (dtab->items >= dtab->map.max_entries) {  in __dev_map_hash_update_elem()
1012 			spin_unlock_irqrestore(&dtab->index_lock, flags);  in __dev_map_hash_update_elem()
1016 		dtab->items++;  in __dev_map_hash_update_elem()
1020 			   dev_map_index_hash(dtab, idx));  in __dev_map_hash_update_elem()
1021 	spin_unlock_irqrestore(&dtab->index_lock, flags);  in __dev_map_hash_update_elem()
1029 	spin_unlock_irqrestore(&dtab->index_lock, flags);  in __dev_map_hash_update_elem()
1056 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_mem_usage()  local
1060 		usage += (u64)dtab->n_buckets * sizeof(struct hlist_head);  in dev_map_mem_usage()
1063 	usage += atomic_read((atomic_t *)&dtab->items) *  in dev_map_mem_usage()
1099 static void dev_map_hash_remove_netdev(struct bpf_dtab *dtab,  in dev_map_hash_remove_netdev()  argument
1105 	spin_lock_irqsave(&dtab->index_lock, flags);  in dev_map_hash_remove_netdev()
1106 	for (i = 0; i < dtab->n_buckets; i++) {  in dev_map_hash_remove_netdev()
1111 		head = dev_map_index_hash(dtab, i);  in dev_map_hash_remove_netdev()
1117 			dtab->items--;  in dev_map_hash_remove_netdev()
1122 	spin_unlock_irqrestore(&dtab->index_lock, flags);  in dev_map_hash_remove_netdev()
1129 	struct bpf_dtab *dtab;  in dev_map_notification()  local
1157 		list_for_each_entry_rcu(dtab, &dev_map_list, list) {  in dev_map_notification()
1158 			if (dtab->map.map_type == BPF_MAP_TYPE_DEVMAP_HASH) {  in dev_map_notification()
1159 				dev_map_hash_remove_netdev(dtab, netdev);  in dev_map_notification()
1163 			for (i = 0; i < dtab->map.max_entries; i++) {  in dev_map_notification()
1166 				dev = rcu_dereference(dtab->netdev_map[i]);  in dev_map_notification()
1169 				odev = unrcu_pointer(cmpxchg(&dtab->netdev_map[i], RCU_INITIALIZER(dev), NULL));  in dev_map_notification()
1173 					atomic_dec((atomic_t *)&dtab->items);  in dev_map_notification()