cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

fib_notifier.c (1594B)

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