net: rtnetlink: plumb extended ack to doit function
Add netlink_ext_ack arg to rtnl_doit_func. Pass extack arg to nlmsg_parse
for doit functions that call it directly.
This is the first step to using extended error reporting in rtnetlink.
>From here individual subsystems can be updated to set netlink_ext_ack as
needed.
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 7a4f2c3..a444374 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2629,7 +2629,8 @@ static int rt_fill_info(struct net *net, __be32 dst, __be32 src, u32 table_id,
return -EMSGSIZE;
}
-static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh)
+static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(in_skb->sk);
struct rtmsg *rtm;
@@ -2646,7 +2647,7 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh)
kuid_t uid;
err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv4_policy,
- NULL);
+ extack);
if (err < 0)
goto errout;