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netlink: extended ACK reporting

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Add the base infrastructure and UAPI for netlink extended ACK
reporting. All "manual" calls to netlink_ack() pass NULL for now and
thus don't get extended ACK reporting.

Big thanks goes to Pablo Neira Ayuso for not only bringing up the
whole topic at netconf (again) but also coming up with the nlattr
passing trick and various other ideas.

Signed-off-by: Johannes Berg <[email protected]>
Reviewed-by: David Ahern <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Johannes Berg 2017-04-12 14:34:04 +02:00 • committed by David S. Miller
commit 2d4bc93368
17 changed files with 153 additions and 34 deletions
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4
net/hsr/hsr_netlink.c
View file

@ -350,7 +350,7 @@ static int hsr_get_node_status(struct sk_buff *skb_in, struct genl_info *info)
return 0;
invalid:
netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL);
netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL, NULL);
return 0;
nla_put_failure:
@ -432,7 +432,7 @@ static int hsr_get_node_list(struct sk_buff *skb_in, struct genl_info *info)
return 0;
invalid:
netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL);
netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL, NULL);
return 0;
nla_put_failure: