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net/ipv6: propagate net.ipv6.conf.all.addr_gen_mode to devices 

This aligns the addr_gen_mode sysctl with the expected behavior of the
"all" variant.

Fixes: d35a00b8e3 ("net/ipv6: allow sysctl to change link-local address generation mode")
Suggested-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sabrina Dubroca 2018-07-09 12:25:17 +02:00 committed by David S. Miller
parent bdd72f4133
commit f24c5987dd
1 changed files with 12 additions and 0 deletions
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12
net/ipv6/addrconf.c
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@ -5926,6 +5926,18 @@ static int addrconf_sysctl_addr_gen_mode(struct ctl_table *ctl, int write,
idev->cnf.addr_gen_mode = new_val;
addrconf_dev_config(idev->dev);
}
} else if (&net->ipv6.devconf_all->addr_gen_mode == ctl->data) {
struct net_device *dev;
net->ipv6.devconf_dflt->addr_gen_mode = new_val;
for_each_netdev(net, dev) {
idev = __in6_dev_get(dev);
if (idev &&
idev->cnf.addr_gen_mode != new_val) {
idev->cnf.addr_gen_mode = new_val;
addrconf_dev_config(idev->dev);
}
}
}
*((u32 *)ctl->data) = new_val;