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ipv6: Clear nexthop flags upon netdev up

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Previous patch marked nexthops with the 'dead' and 'linkdown' flags.
Clear these flags when the netdev comes back up.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2018-01-07 12:45:03 +02:00 committed by David S. Miller
parent 2b2413610e
commit 2127d95aef
3 changed files with 33 additions and 0 deletions
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1
include/net/ip6_route.h
View file

@ -169,6 +169,7 @@ void rt6_ifdown(struct net *net, struct net_device *dev);
void rt6_mtu_change(struct net_device *dev, unsigned int mtu);
void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);
void rt6_clean_tohost(struct net *net, struct in6_addr *gateway);
void rt6_sync_up(struct net_device *dev, unsigned int nh_flags);
static inline const struct rt6_info *skb_rt6_info(const struct sk_buff *skb)
{

3
net/ipv6/addrconf.c
View file

@ -3484,6 +3484,9 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
if (run_pending)
addrconf_dad_run(idev);
/* Device has an address by now */
rt6_sync_up(dev, RTNH_F_DEAD);
/*
* If the MTU changed during the interface down,
* when the interface up, the changed MTU must be

29
net/ipv6/route.c
View file

@ -3459,6 +3459,35 @@ void rt6_clean_tohost(struct net *net, struct in6_addr *gateway)
fib6_clean_all(net, fib6_clean_tohost, gateway);
}
struct arg_netdev_event {
const struct net_device *dev;
unsigned int nh_flags;
};
static int fib6_ifup(struct rt6_info *rt, void *p_arg)
{
const struct arg_netdev_event *arg = p_arg;
const struct net *net = dev_net(arg->dev);
if (rt != net->ipv6.ip6_null_entry && rt->dst.dev == arg->dev)
rt->rt6i_nh_flags &= ~arg->nh_flags;
return 0;
}
void rt6_sync_up(struct net_device *dev, unsigned int nh_flags)
{
struct arg_netdev_event arg = {
.dev = dev,
.nh_flags = nh_flags,
};
if (nh_flags & RTNH_F_DEAD && netif_carrier_ok(dev))
arg.nh_flags |= RTNH_F_LINKDOWN;
fib6_clean_all(dev_net(dev), fib6_ifup, &arg);
}
struct arg_dev_net {
struct net_device *dev;
struct net *net;