netlink: extended ACK reporting

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 <johannes.berg@intel.com>
Reviewed-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/audit.c b/kernel/audit.c
index 2f4964cfde0b..d54bf5932374 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -1402,7 +1402,7 @@ static void audit_receive_skb(struct sk_buff *skb)
                 err = audit_receive_msg(skb, nlh);
                 /* if err or if this message says it wants a response */
                 if (err || (nlh->nlmsg_flags & NLM_F_ACK))
-                        netlink_ack(skb, nlh, err);
+                        netlink_ack(skb, nlh, err, NULL);
 
                 nlh = nlmsg_next(nlh, &len);
         }