From: Stephen Hemminger <stephen@networkplumber.org>
Date: Sat, 10 Feb 2024 17:32:31 +0000 (-0800)
Subject: netlink: display information from missing type extack
X-Git-Tag: v6.9.0~32^2~11
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7e646c80d7573bc4791b268a8dee472f11c33ff1;p=thirdparty%2Fiproute2.git

netlink: display information from missing type extack

The kernel will now send missing type information in error response.
Print it if present.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David Ahern <dsahern@kernel.org>
---

diff --git a/lib/libnetlink.c b/lib/libnetlink.c
index 01648229..e2b284e6 100644
--- a/lib/libnetlink.c
+++ b/lib/libnetlink.c
@@ -111,6 +111,10 @@ int nl_dump_ext_ack(const struct nlmsghdr *nlh, nl_ext_ack_fn_t errfn)
 			err_nlh = &err->msg;
 	}
 
+	if (tb[NLMSGERR_ATTR_MISS_TYPE])
+		fprintf(stderr, "Missing required attribute type %u\n",
+			mnl_attr_get_u32(tb[NLMSGERR_ATTR_MISS_TYPE]));
+
 	if (errfn)
 		return errfn(msg, off, err_nlh);