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ipv6: take care of disable_policy when restoring routes 

When routes corresponding to addresses are restored by
fixup_permanent_addr(), the dst_nopolicy parameter was not set.
The typical use case is a user that configures an address on a down
interface and then put this interface up.

Let's take care of this flag in addrconf_f6i_alloc(), so that every callers
benefit ont it.

CC: stable@kernel.org
CC: David Forster <dforster@brocade.com>
Fixes: df789fe752 ("ipv6: Provide ipv6 version of "disable_policy" sysctl")
Reported-by: Siwar Zitouni <siwar.zitouni@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20220623120015.32640-1-nicolas.dichtel@6wind.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Nicolas Dichtel 2022-06-23 14:00:15 +02:00 committed by Jakub Kicinski
parent ce95ab775f
commit 3b0dc529f5
2 changed files with 8 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
net/ipv6/addrconf.c
View File

@ -1109,10 +1109,6 @@ ipv6_add_addr(struct inet6_dev *idev, struct ifa6_config *cfg,
goto out;
}
if (net->ipv6.devconf_all->disable_policy ||
idev->cnf.disable_policy)
f6i->dst_nopolicy = true;
neigh_parms_data_state_setall(idev->nd_parms);
ifa->addr = *cfg->pfx;

9
net/ipv6/route.c
View File

@ -4569,8 +4569,15 @@ struct fib6_info *addrconf_f6i_alloc(struct net *net,
}
f6i = ip6_route_info_create(&cfg, gfp_flags, NULL);
if (!IS_ERR(f6i))
if (!IS_ERR(f6i)) {
f6i->dst_nocount = true;
if (!anycast &&
(net->ipv6.devconf_all->disable_policy ||
idev->cnf.disable_policy))
f6i->dst_nopolicy = true;
}
return f6i;
}