// SPDX-License-Identifier: GPL-2.0
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#include <linux/rtnetlink.h>
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#include <linux/notifier.h>
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#include <linux/socket.h>
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#include <linux/kernel.h>
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#include <linux/export.h>
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#include <net/net_namespace.h>
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#include <net/fib_notifier.h>
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#include <net/netns/ipv4.h>
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#include <net/ip_fib.h>
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int call_fib4_notifier(struct notifier_block *nb,
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enum fib_event_type event_type,
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struct fib_notifier_info *info)
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{
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info->family = AF_INET;
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return call_fib_notifier(nb, event_type, info);
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}
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int call_fib4_notifiers(struct net *net, enum fib_event_type event_type,
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struct fib_notifier_info *info)
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{
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ASSERT_RTNL();
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info->family = AF_INET;
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net->ipv4.fib_seq++;
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return call_fib_notifiers(net, event_type, info);
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}
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static unsigned int fib4_seq_read(struct net *net)
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{
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ASSERT_RTNL();
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return net->ipv4.fib_seq + fib4_rules_seq_read(net);
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}
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static int fib4_dump(struct net *net, struct notifier_block *nb,
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struct netlink_ext_ack *extack)
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{
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int err;
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err = fib4_rules_dump(net, nb, extack);
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if (err)
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return err;
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return fib_notify(net, nb, extack);
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}
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static const struct fib_notifier_ops fib4_notifier_ops_template = {
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.family = AF_INET,
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.fib_seq_read = fib4_seq_read,
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.fib_dump = fib4_dump,
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.owner = THIS_MODULE,
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};
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int __net_init fib4_notifier_init(struct net *net)
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{
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struct fib_notifier_ops *ops;
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net->ipv4.fib_seq = 0;
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ops = fib_notifier_ops_register(&fib4_notifier_ops_template, net);
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if (IS_ERR(ops))
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return PTR_ERR(ops);
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net->ipv4.notifier_ops = ops;
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return 0;
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}
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void __net_exit fib4_notifier_exit(struct net *net)
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{
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fib_notifier_ops_unregister(net->ipv4.notifier_ops);
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}
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