1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * net/l3mdev/l3mdev.c - L3 master device implementation
23 		return -EINVAL;  in l3mdev_check_type()
42 	if (hdlr->dev_lookup) {  in l3mdev_table_lookup_register()
43 		res = -EBUSY;  in l3mdev_table_lookup_register()
47 	hdlr->dev_lookup = fn;  in l3mdev_table_lookup_register()
69 	if (hdlr->dev_lookup == fn)  in l3mdev_table_lookup_unregister()
70 		hdlr->dev_lookup = NULL;  in l3mdev_table_lookup_unregister()
79 	lookup_by_table_id_t lookup;  in l3mdev_ifindex_lookup_by_table_id()  local
81 	int ifindex = -EINVAL;  in l3mdev_ifindex_lookup_by_table_id()
92 	lookup = hdlr->dev_lookup;  in l3mdev_ifindex_lookup_by_table_id()
93 	if (!lookup)  in l3mdev_ifindex_lookup_by_table_id()
96 	ifindex = lookup(net, table_id);  in l3mdev_ifindex_lookup_by_table_id()
106  *	l3mdev_master_ifindex_rcu - get index of L3 master device
118 		ifindex = dev->ifindex;  in l3mdev_master_ifindex_rcu()
131 			ifindex = master->ifindex;  in l3mdev_master_ifindex_rcu()
139  *	l3mdev_master_upper_ifindex_by_index_rcu - get index of upper l3 master
141  *	@net: network namespace for device index lookup
152 	return dev ? dev->ifindex : 0;  in l3mdev_master_upper_ifindex_by_index_rcu()
157  *	l3mdev_fib_table_rcu - get FIB table id associated with an L3
170 		if (dev->l3mdev_ops->l3mdev_fib_table)  in l3mdev_fib_table_rcu()
171 			tb_id = dev->l3mdev_ops->l3mdev_fib_table(dev);  in l3mdev_fib_table_rcu()
173 		/* Users of netdev_master_upper_dev_get_rcu need non-const,  in l3mdev_fib_table_rcu()
181 		    master->l3mdev_ops->l3mdev_fib_table)  in l3mdev_fib_table_rcu()
182 			tb_id = master->l3mdev_ops->l3mdev_fib_table(master);  in l3mdev_fib_table_rcu()
210  *	l3mdev_link_scope_lookup - IPv6 route lookup based on flow for link
212  *	@net: network namespace for device index lookup
213  *	@fl6: IPv6 flow struct for lookup
225 	if (fl6->flowi6_oif) {  in l3mdev_link_scope_lookup()
226 		dev = dev_get_by_index_rcu(net, fl6->flowi6_oif);  in l3mdev_link_scope_lookup()
231 		    dev->l3mdev_ops->l3mdev_link_scope_lookup)  in l3mdev_link_scope_lookup()
232 			dst = dev->l3mdev_ops->l3mdev_link_scope_lookup(dev, fl6);  in l3mdev_link_scope_lookup()
240  *	l3mdev_fib_rule_match - Determine if flowi references an
242  *	@net: network namespace for device index lookup
244  *	@arg: store the table the rule matched with here
254 	if (!fl->flowi_l3mdev)  in l3mdev_fib_rule_match()
259 	dev = dev_get_by_index_rcu(net, fl->flowi_l3mdev);  in l3mdev_fib_rule_match()
261 	    dev->l3mdev_ops->l3mdev_fib_table) {  in l3mdev_fib_rule_match()
262 		arg->table = dev->l3mdev_ops->l3mdev_fib_table(dev);  in l3mdev_fib_rule_match()
277 	if (fl->flowi_oif) {  in l3mdev_update_flow()
278 		dev = dev_get_by_index_rcu(net, fl->flowi_oif);  in l3mdev_update_flow()
280 			if (!fl->flowi_l3mdev)  in l3mdev_update_flow()
281 				fl->flowi_l3mdev = l3mdev_master_ifindex_rcu(dev);  in l3mdev_update_flow()
283 			/* oif set to L3mdev directs lookup to its table;  in l3mdev_update_flow()
287 				fl->flowi_oif = 0;  in l3mdev_update_flow()
292 	if (fl->flowi_iif > LOOPBACK_IFINDEX && !fl->flowi_l3mdev) {  in l3mdev_update_flow()
293 		dev = dev_get_by_index_rcu(net, fl->flowi_iif);  in l3mdev_update_flow()
295 			fl->flowi_l3mdev = l3mdev_master_ifindex_rcu(dev);  in l3mdev_update_flow()