103 static inline struct hlist_head *dev_map_index_hash(struct bpf_dtab *dtab,  in dev_map_index_hash()  argument
106 	return &dtab->dev_index_head[idx & (dtab->n_buckets - 1)];  in dev_map_index_hash()
134 static int dev_map_init_map(struct bpf_dtab *dtab, union bpf_attr *attr)  in dev_map_init_map()  argument
140 	bpf_map_init_from_attr(&dtab->map, attr);  in dev_map_init_map()
144 		dtab->n_buckets = roundup_pow_of_two(dtab->map.max_entries);  in dev_map_init_map()
145 		dtab->dev_index_head = dev_map_create_hash(dtab->n_buckets,  in dev_map_init_map()
146 							   dtab->map.numa_node);  in dev_map_init_map()
147 		if (!dtab->dev_index_head)  in dev_map_init_map()
150 		spin_lock_init(&dtab->index_lock);  in dev_map_init_map()
152 		dtab->netdev_map = bpf_map_area_alloc((u64) dtab->map.max_entries *  in dev_map_init_map()
154 						      dtab->map.numa_node);  in dev_map_init_map()
155 		if (!dtab->netdev_map)  in dev_map_init_map()
164 	struct bpf_dtab *dtab;  in dev_map_alloc()  local
167 	dtab = bpf_map_area_alloc(sizeof(*dtab), NUMA_NO_NODE);  in dev_map_alloc()
168 	if (!dtab)  in dev_map_alloc()
171 	err = dev_map_init_map(dtab, attr);  in dev_map_alloc()
173 		bpf_map_area_free(dtab);  in dev_map_alloc()
178 	list_add_tail_rcu(&dtab->list, &dev_map_list);  in dev_map_alloc()
181 	return &dtab->map;  in dev_map_alloc()
186 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_free()  local
200 	list_del_rcu(&dtab->list);  in dev_map_free()
216 	if (dtab->map.map_type == BPF_MAP_TYPE_DEVMAP_HASH) {  in dev_map_free()
217 		for (i = 0; i < dtab->n_buckets; i++) {  in dev_map_free()
222 			head = dev_map_index_hash(dtab, i);  in dev_map_free()
233 		bpf_map_area_free(dtab->dev_index_head);  in dev_map_free()
235 		for (i = 0; i < dtab->map.max_entries; i++) {  in dev_map_free()
238 			dev = rcu_dereference_raw(dtab->netdev_map[i]);  in dev_map_free()
248 		bpf_map_area_free(dtab->netdev_map);  in dev_map_free()
251 	bpf_map_area_free(dtab);  in dev_map_free()
256 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_get_next_key()  local
260 	if (index >= dtab->map.max_entries) {  in dev_map_get_next_key()
265 	if (index == dtab->map.max_entries - 1)  in dev_map_get_next_key()
277 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in __dev_map_hash_lookup_elem()  local
278 	struct hlist_head *head = dev_map_index_hash(dtab, key);  in __dev_map_hash_lookup_elem()
282 				 lockdep_is_held(&dtab->index_lock))  in __dev_map_hash_lookup_elem()
292 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_hash_get_next_key()  local
315 	i = idx & (dtab->n_buckets - 1);  in dev_map_hash_get_next_key()
319 	for (; i < dtab->n_buckets; i++) {  in dev_map_hash_get_next_key()
320 		head = dev_map_index_hash(dtab, i);  in dev_map_hash_get_next_key()
441 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in __dev_map_lookup_elem()  local
447 	obj = rcu_dereference_check(dtab->netdev_map[key],  in __dev_map_lookup_elem()
609 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_enqueue_multi()  local
624 			dst = rcu_dereference_check(dtab->netdev_map[i],  in dev_map_enqueue_multi()
645 		for (i = 0; i < dtab->n_buckets; i++) {  in dev_map_enqueue_multi()
646 			head = dev_map_index_hash(dtab, i);  in dev_map_enqueue_multi()
648 						 lockdep_is_held(&dtab->index_lock)) {  in dev_map_enqueue_multi()
726 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_redirect_multi()  local
742 			dst = rcu_dereference_check(dtab->netdev_map[i],  in dev_map_redirect_multi()
764 		for (i = 0; i < dtab->n_buckets; i++) {  in dev_map_redirect_multi()
765 			head = dev_map_index_hash(dtab, i);  in dev_map_redirect_multi()
822 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_delete_elem()  local
829 	old_dev = unrcu_pointer(xchg(&dtab->netdev_map[k], NULL));  in dev_map_delete_elem()
832 		atomic_dec((atomic_t *)&dtab->items);  in dev_map_delete_elem()
839 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_hash_delete_elem()  local
845 	spin_lock_irqsave(&dtab->index_lock, flags);  in dev_map_hash_delete_elem()
849 		dtab->items--;  in dev_map_hash_delete_elem()
854 	spin_unlock_irqrestore(&dtab->index_lock, flags);  in dev_map_hash_delete_elem()
860 						    struct bpf_dtab *dtab,  in __dev_map_alloc_node()  argument
867 	dev = bpf_map_kmalloc_node(&dtab->map, sizeof(*dev),  in __dev_map_alloc_node()
869 				   dtab->map.numa_node);  in __dev_map_alloc_node()
883 		    !bpf_prog_map_compatible(&dtab->map, prog))  in __dev_map_alloc_node()
910 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in __dev_map_update_elem()  local
917 	if (unlikely(i >= dtab->map.max_entries))  in __dev_map_update_elem()
931 		dev = __dev_map_alloc_node(net, dtab, &val, i);  in __dev_map_update_elem()
940 	old_dev = unrcu_pointer(xchg(&dtab->netdev_map[i], RCU_INITIALIZER(dev)));  in __dev_map_update_elem()
944 		atomic_inc((atomic_t *)&dtab->items);  in __dev_map_update_elem()
959 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in __dev_map_hash_update_elem()  local
972 	spin_lock_irqsave(&dtab->index_lock, flags);  in __dev_map_hash_update_elem()
978 	dev = __dev_map_alloc_node(net, dtab, &val, idx);  in __dev_map_hash_update_elem()
987 		if (dtab->items >= dtab->map.max_entries) {  in __dev_map_hash_update_elem()
988 			spin_unlock_irqrestore(&dtab->index_lock, flags);  in __dev_map_hash_update_elem()
992 		dtab->items++;  in __dev_map_hash_update_elem()
996 			   dev_map_index_hash(dtab, idx));  in __dev_map_hash_update_elem()
997 	spin_unlock_irqrestore(&dtab->index_lock, flags);  in __dev_map_hash_update_elem()
1005 	spin_unlock_irqrestore(&dtab->index_lock, flags);  in __dev_map_hash_update_elem()
1032 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_mem_usage()  local
1036 		usage += (u64)dtab->n_buckets * sizeof(struct hlist_head);  in dev_map_mem_usage()
1039 	usage += atomic_read((atomic_t *)&dtab->items) *  in dev_map_mem_usage()
1075 static void dev_map_hash_remove_netdev(struct bpf_dtab *dtab,  in dev_map_hash_remove_netdev()  argument
1081 	spin_lock_irqsave(&dtab->index_lock, flags);  in dev_map_hash_remove_netdev()
1082 	for (i = 0; i < dtab->n_buckets; i++) {  in dev_map_hash_remove_netdev()
1087 		head = dev_map_index_hash(dtab, i);  in dev_map_hash_remove_netdev()
1093 			dtab->items--;  in dev_map_hash_remove_netdev()
1098 	spin_unlock_irqrestore(&dtab->index_lock, flags);  in dev_map_hash_remove_netdev()
1105 	struct bpf_dtab *dtab;  in dev_map_notification()  local
1128 		list_for_each_entry_rcu(dtab, &dev_map_list, list) {  in dev_map_notification()
1129 			if (dtab->map.map_type == BPF_MAP_TYPE_DEVMAP_HASH) {  in dev_map_notification()
1130 				dev_map_hash_remove_netdev(dtab, netdev);  in dev_map_notification()
1134 			for (i = 0; i < dtab->map.max_entries; i++) {  in dev_map_notification()
1137 				dev = rcu_dereference(dtab->netdev_map[i]);  in dev_map_notification()
1140 				odev = unrcu_pointer(cmpxchg(&dtab->netdev_map[i], RCU_INITIALIZER(dev), NULL));  in dev_map_notification()
1144 					atomic_dec((atomic_t *)&dtab->items);  in dev_map_notification()