linux/net/ipv4/fib_notifier.c
Jiri Pirko b7a595577e net: fib_notifier: propagate extack down to the notifier block callback
Since errors are propagated all the way up to the caller, propagate
possible extack of the caller all the way down to the notifier block
callback.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-10-04 11:10:56 -07:00

74 lines
1.6 KiB
C

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