netdev - [PATCH iproute2-next 02/11] libnetlink: Convert GETROUTE dumps to use rtnl_routedump

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Message-Id: <20180929175931.18448-3-dsahern@kernel.org>
Date:   Sat, 29 Sep 2018 10:59:22 -0700
From:   David Ahern <dsahern@...nel.org>
To:     netdev@...r.kernel.org
Cc:     stephen@...workplumber.org, christian@...uner.io,
        David Ahern <dsahern@...il.com>
Subject: [PATCH iproute2-next 02/11] libnetlink: Convert GETROUTE dumps to use rtnl_routedump_req

From: David Ahern <dsahern@...il.com>

Add rtnl_routedump_req for route dumps using the proper rtmsg
as the header. Convert existing RTM_GETROUTE dumps to use it.

Signed-off-by: David Ahern <dsahern@...il.com>
---
 include/libnetlink.h |  2 ++
 ip/ipmroute.c        |  2 +-
 ip/iproute.c         |  4 ++--
 lib/libnetlink.c     | 16 ++++++++++++++++
 4 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/include/libnetlink.h b/include/libnetlink.h
index 2d9f6190230c..a60af316b505 100644
--- a/include/libnetlink.h
+++ b/include/libnetlink.h
@@ -49,6 +49,8 @@ void rtnl_close(struct rtnl_handle *rth);
 
 int rtnl_addrdump_req(struct rtnl_handle *rth, int family)
 	__attribute__((warn_unused_result));
+int rtnl_routedump_req(struct rtnl_handle *rth, int family)
+	__attribute__((warn_unused_result));
 
 int rtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type)
 	__attribute__((warn_unused_result));
diff --git a/ip/ipmroute.c b/ip/ipmroute.c
index bc23cfea7e8b..c5dfa9cb1538 100644
--- a/ip/ipmroute.c
+++ b/ip/ipmroute.c
@@ -283,7 +283,7 @@ static int mroute_list(int argc, char **argv)
 		filter.iif = idx;
 	}
 
-	if (rtnl_wilddump_request(&rth, filter.af, RTM_GETROUTE) < 0) {
+	if (rtnl_routedump_req(&rth, filter.af) < 0) {
 		perror("Cannot send dump request");
 		return 1;
 	}
diff --git a/ip/iproute.c b/ip/iproute.c
index 398322fd1f4f..699635923764 100644
--- a/ip/iproute.c
+++ b/ip/iproute.c
@@ -1645,7 +1645,7 @@ static int iproute_flush(int do_ipv6, rtnl_filter_t filter_fn)
 	filter.flushe = sizeof(flushb);
 
 	for (;;) {
-		if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
+		if (rtnl_routedump_req(&rth, do_ipv6) < 0) {
 			perror("Cannot send dump request");
 			return -2;
 		}
@@ -1891,7 +1891,7 @@ static int iproute_list_flush_or_save(int argc, char **argv, int action)
 		return iproute_flush(do_ipv6, filter_fn);
 
 	if (!filter.cloned) {
-		if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
+		if (rtnl_routedump_req(&rth, do_ipv6) < 0) {
 			perror("Cannot send dump request");
 			return -2;
 		}
diff --git a/lib/libnetlink.c b/lib/libnetlink.c
index 749cf4fbb88e..fda5309ce44d 100644
--- a/lib/libnetlink.c
+++ b/lib/libnetlink.c
@@ -215,6 +215,22 @@ int rtnl_addrdump_req(struct rtnl_handle *rth, int family)
 	return send(rth->fd, &req, sizeof(req), 0);
 }
 
+int rtnl_routedump_req(struct rtnl_handle *rth, int family)
+{
+	struct {
+		struct nlmsghdr nlh;
+		struct rtmsg rtm;
+	} req = {
+		.nlh.nlmsg_len = sizeof(req),
+		.nlh.nlmsg_type = RTM_GETROUTE,
+		.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
+		.nlh.nlmsg_seq = rth->dump = ++rth->seq,
+		.rtm.rtm_family = family,
+	};
+
+	return send(rth->fd, &req, sizeof(req), 0);
+}
+
 int rtnl_wilddump_request(struct rtnl_handle *rth, int family, int type)
 {
 	return rtnl_wilddump_req_filter(rth, family, type, RTEXT_FILTER_VF);
-- 
2.11.0