Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #include <linux/rtnetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #include <linux/notifier.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <linux/socket.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <net/net_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <net/fib_notifier.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <net/netns/ipv4.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <net/ip_fib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) int call_fib4_notifier(struct notifier_block *nb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 		       enum fib_event_type event_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 		       struct fib_notifier_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	info->family = AF_INET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	return call_fib_notifier(nb, event_type, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) int call_fib4_notifiers(struct net *net, enum fib_event_type event_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 			struct fib_notifier_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	info->family = AF_INET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	net->ipv4.fib_seq++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	return call_fib_notifiers(net, event_type, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static unsigned int fib4_seq_read(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	return net->ipv4.fib_seq + fib4_rules_seq_read(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static int fib4_dump(struct net *net, struct notifier_block *nb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 		     struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	err = fib4_rules_dump(net, nb, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	return fib_notify(net, nb, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static const struct fib_notifier_ops fib4_notifier_ops_template = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	.family		= AF_INET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	.fib_seq_read	= fib4_seq_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	.fib_dump	= fib4_dump,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	.owner		= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) int __net_init fib4_notifier_init(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	struct fib_notifier_ops *ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	net->ipv4.fib_seq = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	ops = fib_notifier_ops_register(&fib4_notifier_ops_template, net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	if (IS_ERR(ops))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 		return PTR_ERR(ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	net->ipv4.notifier_ops = ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) void __net_exit fib4_notifier_exit(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	fib_notifier_ops_unregister(net->ipv4.notifier_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }