104 static inline struct hlist_head *dev_map_index_hash(struct bpf_dtab *dtab,  in dev_map_index_hash()  argument
107 	return &dtab->dev_index_head[idx & (dtab->n_buckets - 1)];  in dev_map_index_hash()
110 static int dev_map_init_map(struct bpf_dtab *dtab, union bpf_attr *attr)  in dev_map_init_map()  argument
130 	bpf_map_init_from_attr(&dtab->map, attr);  in dev_map_init_map()
133 		dtab->n_buckets = roundup_pow_of_two(dtab->map.max_entries);  in dev_map_init_map()
135 		if (!dtab->n_buckets) /* Overflow check */  in dev_map_init_map()
140 		dtab->dev_index_head = dev_map_create_hash(dtab->n_buckets,  in dev_map_init_map()
141 							   dtab->map.numa_node);  in dev_map_init_map()
142 		if (!dtab->dev_index_head)  in dev_map_init_map()
145 		spin_lock_init(&dtab->index_lock);  in dev_map_init_map()
147 		dtab->netdev_map = bpf_map_area_alloc((u64) dtab->map.max_entries *  in dev_map_init_map()
149 						      dtab->map.numa_node);  in dev_map_init_map()
150 		if (!dtab->netdev_map)  in dev_map_init_map()
159 	struct bpf_dtab *dtab;  in dev_map_alloc()  local
162 	dtab = bpf_map_area_alloc(sizeof(*dtab), NUMA_NO_NODE);  in dev_map_alloc()
163 	if (!dtab)  in dev_map_alloc()
166 	err = dev_map_init_map(dtab, attr);  in dev_map_alloc()
168 		bpf_map_area_free(dtab);  in dev_map_alloc()
173 	list_add_tail_rcu(&dtab->list, &dev_map_list);  in dev_map_alloc()
176 	return &dtab->map;  in dev_map_alloc()
181 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_free()  local
195 	list_del_rcu(&dtab->list);  in dev_map_free()
204 	if (dtab->map.map_type == BPF_MAP_TYPE_DEVMAP_HASH) {  in dev_map_free()
205 		for (i = 0; i < dtab->n_buckets; i++) {  in dev_map_free()
210 			head = dev_map_index_hash(dtab, i);  in dev_map_free()
221 		bpf_map_area_free(dtab->dev_index_head);  in dev_map_free()
223 		for (i = 0; i < dtab->map.max_entries; i++) {  in dev_map_free()
226 			dev = rcu_dereference_raw(dtab->netdev_map[i]);  in dev_map_free()
236 		bpf_map_area_free(dtab->netdev_map);  in dev_map_free()
239 	bpf_map_area_free(dtab);  in dev_map_free()
244 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_get_next_key()  local
248 	if (index >= dtab->map.max_entries) {  in dev_map_get_next_key()
253 	if (index == dtab->map.max_entries - 1)  in dev_map_get_next_key()
265 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in __dev_map_hash_lookup_elem()  local
266 	struct hlist_head *head = dev_map_index_hash(dtab, key);  in __dev_map_hash_lookup_elem()
270 				 lockdep_is_held(&dtab->index_lock))  in __dev_map_hash_lookup_elem()
280 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_hash_get_next_key()  local
303 	i = idx & (dtab->n_buckets - 1);  in dev_map_hash_get_next_key()
307 	for (; i < dtab->n_buckets; i++) {  in dev_map_hash_get_next_key()
308 		head = dev_map_index_hash(dtab, i);  in dev_map_hash_get_next_key()
427 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in __dev_map_lookup_elem()  local
433 	obj = rcu_dereference_check(dtab->netdev_map[key],  in __dev_map_lookup_elem()
594 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_enqueue_multi()  local
609 			dst = rcu_dereference_check(dtab->netdev_map[i],  in dev_map_enqueue_multi()
630 		for (i = 0; i < dtab->n_buckets; i++) {  in dev_map_enqueue_multi()
631 			head = dev_map_index_hash(dtab, i);  in dev_map_enqueue_multi()
633 						 lockdep_is_held(&dtab->index_lock)) {  in dev_map_enqueue_multi()
711 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_redirect_multi()  local
727 			dst = rcu_dereference_check(dtab->netdev_map[i],  in dev_map_redirect_multi()
749 		for (i = 0; i < dtab->n_buckets; i++) {  in dev_map_redirect_multi()
750 			head = dev_map_index_hash(dtab, i);  in dev_map_redirect_multi()
810 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_delete_elem()  local
817 	old_dev = unrcu_pointer(xchg(&dtab->netdev_map[k], NULL));  in dev_map_delete_elem()
820 		atomic_dec((atomic_t *)&dtab->items);  in dev_map_delete_elem()
827 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_hash_delete_elem()  local
833 	spin_lock_irqsave(&dtab->index_lock, flags);  in dev_map_hash_delete_elem()
837 		dtab->items--;  in dev_map_hash_delete_elem()
842 	spin_unlock_irqrestore(&dtab->index_lock, flags);  in dev_map_hash_delete_elem()
848 						    struct bpf_dtab *dtab,  in __dev_map_alloc_node()  argument
855 	dev = bpf_map_kmalloc_node(&dtab->map, sizeof(*dev),  in __dev_map_alloc_node()
857 				   dtab->map.numa_node);  in __dev_map_alloc_node()
871 		    !bpf_prog_map_compatible(&dtab->map, prog))  in __dev_map_alloc_node()
898 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in __dev_map_update_elem()  local
905 	if (unlikely(i >= dtab->map.max_entries))  in __dev_map_update_elem()
919 		dev = __dev_map_alloc_node(net, dtab, &val, i);  in __dev_map_update_elem()
928 	old_dev = unrcu_pointer(xchg(&dtab->netdev_map[i], RCU_INITIALIZER(dev)));  in __dev_map_update_elem()
932 		atomic_inc((atomic_t *)&dtab->items);  in __dev_map_update_elem()
947 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in __dev_map_hash_update_elem()  local
960 	spin_lock_irqsave(&dtab->index_lock, flags);  in __dev_map_hash_update_elem()
966 	dev = __dev_map_alloc_node(net, dtab, &val, idx);  in __dev_map_hash_update_elem()
975 		if (dtab->items >= dtab->map.max_entries) {  in __dev_map_hash_update_elem()
976 			spin_unlock_irqrestore(&dtab->index_lock, flags);  in __dev_map_hash_update_elem()
980 		dtab->items++;  in __dev_map_hash_update_elem()
984 			   dev_map_index_hash(dtab, idx));  in __dev_map_hash_update_elem()
985 	spin_unlock_irqrestore(&dtab->index_lock, flags);  in __dev_map_hash_update_elem()
993 	spin_unlock_irqrestore(&dtab->index_lock, flags);  in __dev_map_hash_update_elem()
1020 	struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map);  in dev_map_mem_usage()  local
1024 		usage += (u64)dtab->n_buckets * sizeof(struct hlist_head);  in dev_map_mem_usage()
1027 	usage += atomic_read((atomic_t *)&dtab->items) *  in dev_map_mem_usage()
1061 static void dev_map_hash_remove_netdev(struct bpf_dtab *dtab,  in dev_map_hash_remove_netdev()  argument
1067 	spin_lock_irqsave(&dtab->index_lock, flags);  in dev_map_hash_remove_netdev()
1068 	for (i = 0; i < dtab->n_buckets; i++) {  in dev_map_hash_remove_netdev()
1073 		head = dev_map_index_hash(dtab, i);  in dev_map_hash_remove_netdev()
1079 			dtab->items--;  in dev_map_hash_remove_netdev()
1084 	spin_unlock_irqrestore(&dtab->index_lock, flags);  in dev_map_hash_remove_netdev()
1091 	struct bpf_dtab *dtab;  in dev_map_notification()  local
1114 		list_for_each_entry_rcu(dtab, &dev_map_list, list) {  in dev_map_notification()
1115 			if (dtab->map.map_type == BPF_MAP_TYPE_DEVMAP_HASH) {  in dev_map_notification()
1116 				dev_map_hash_remove_netdev(dtab, netdev);  in dev_map_notification()
1120 			for (i = 0; i < dtab->map.max_entries; i++) {  in dev_map_notification()
1123 				dev = rcu_dereference(dtab->netdev_map[i]);  in dev_map_notification()
1126 				odev = unrcu_pointer(cmpxchg(&dtab->netdev_map[i], RCU_INITIALIZER(dev), NULL));  in dev_map_notification()
1130 					atomic_dec((atomic_t *)&dtab->items);  in dev_map_notification()