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ipv4: loopback device: ignore value changes after device is upped

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When lo is brought up, new ifa is created. Then, devconf and neigh values
bitfield should be set so later changes of default values would not
affect lo values.

Note that the same behaviour is in ipv6. Also note that this is likely
not an issue in many distros (for example Fedora 19) because userspace
sets address to lo manually before bringing it up.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2014-01-07 15:55:45 +01:00 committed by David S. Miller
parent 509aba3b0d
commit dfd1582d1e
1 changed files with 2 additions and 0 deletions
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net/ipv4/devinet.c
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@ -1385,6 +1385,8 @@ static int inetdev_event(struct notifier_block *this, unsigned long event,
memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
set_ifa_lifetime(ifa, INFINITY_LIFE_TIME,
INFINITY_LIFE_TIME);
ipv4_devconf_setall(in_dev);
neigh_parms_data_state_setall(in_dev->arp_parms);
inet_insert_ifa(ifa);
}
}