From b2958475a62de444f8bf0e756406f7097a415a4b Mon Sep 17 00:00:00 2001
From: Phil Sutter <psutter@redhat.com>
Date: Wed, 20 Jul 2016 22:54:33 +0200
Subject: [PATCH] iplink: bond_slave: Add missing help functions

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1269528
Upstream Status: iproute2.git commit 25c93faa58806

commit 25c93faa58806479ea73bc2d5ceb545e5e932867
Author: Phil Sutter <phil@nwl.cc>
Date:   Sat Jul 9 11:22:46 2016 +0200

    iplink: bond_slave: Add missing help functions

    Signed-off-by: Phil Sutter <phil@nwl.cc>
---
 ip/iplink_bond_slave.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/ip/iplink_bond_slave.c b/ip/iplink_bond_slave.c
index 2f3364e..5a802b1 100644
--- a/ip/iplink_bond_slave.c
+++ b/ip/iplink_bond_slave.c
@@ -17,6 +17,16 @@
 #include "utils.h"
 #include "ip_common.h"
 
+static void print_explain(FILE *f)
+{
+	fprintf(f, "Usage: ... bond_slave [ queue_id ID ]\n");
+}
+
+static void explain(void)
+{
+	print_explain(stderr);
+}
+
 static const char *slave_states[] = {
 	[BOND_STATE_ACTIVE] = "ACTIVE",
 	[BOND_STATE_BACKUP] = "BACKUP",
@@ -99,6 +109,13 @@ static int bond_slave_parse_opt(struct link_util *lu, int argc, char **argv,
 			if (get_u16(&queue_id, *argv, 0))
 				invarg("queue_id is invalid", *argv);
 			addattr16(n, 1024, IFLA_BOND_SLAVE_QUEUE_ID, queue_id);
+		} else {
+			if (matches(*argv, "help") != 0)
+				fprintf(stderr,
+					"bond_slave: unknown option \"%s\"?\n",
+					*argv);
+			explain();
+			return -1;
 		}
 		argc--, argv++;
 	}
@@ -106,10 +123,17 @@ static int bond_slave_parse_opt(struct link_util *lu, int argc, char **argv,
 	return 0;
 }
 
+static void bond_slave_print_help(struct link_util *lu, int argc, char **argv,
+				  FILE *f)
+{
+	print_explain(f);
+}
+
 struct link_util bond_slave_link_util = {
 	.id		= "bond",
 	.maxattr	= IFLA_BOND_SLAVE_MAX,
 	.print_opt	= bond_slave_print_opt,
 	.parse_opt	= bond_slave_parse_opt,
+	.print_help	= bond_slave_print_help,
 	.slave		= true,
 };
-- 
1.8.3.1