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ipv6: report errors for iftoken via netlink extack

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Setting iftoken can fail for several different reasons but there
and there was no report to user as to the cause. Add netlink
extended errors to the processing of the request.

This requires adding additional argument through rtnl_af_ops
set_link_af callback.

Reported-by: Hongren Zheng <li@zenithal.me>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2021-04-07 08:59:12 -07:00 • committed by David S. Miller
parent f2fbd0aacd
commit 3583a4e8d7
4 changed files with 31 additions and 10 deletions
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2
net/core/rtnetlink.c
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@ -2863,7 +2863,7 @@ static int do_setlink(const struct sk_buff *skb,
BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
err = af_ops->set_link_af(dev, af);
err = af_ops->set_link_af(dev, af, extack);
if (err < 0) {
rcu_read_unlock();
goto errout;