From f24c5987dddd28b23443e7b21b55d47549207755 Mon Sep 17 00:00:00 2001 From: Sabrina Dubroca Date: Mon, 9 Jul 2018 12:25:17 +0200 Subject: [PATCH] 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: d35a00b8e33d ("net/ipv6: allow sysctl to change link-local address generation mode") Suggested-by: David Ahern Signed-off-by: Sabrina Dubroca Signed-off-by: David S. Miller --- net/ipv6/addrconf.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index e89bca83e0e4..1659a6b3cf42 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -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; -- 2.30.2