[iproute2] iplink: add support for IFLA_CARRIER attribute

[Zhang Shengju]

Add support to set IFLA_CARRIER attribute.

Signed-off-by: Zhang Shengju <zhangshen...@cmss.chinamobile.com>
---
 ip/iplink.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/ip/iplink.c b/ip/iplink.c
index 866ad72..263bfdd 100644
--- a/ip/iplink.c
+++ b/ip/iplink.c
@@ -72,6 +72,7 @@ void iplink_usage(void)
                "                         [ allmulticast { on | off } ]\n"
                "                         [ promisc { on | off } ]\n"
                "                         [ trailers { on | off } ]\n"
+               "                         [ carrier { on | off } ]\n"
                "                         [ txqueuelen PACKETS ]\n"
                "                         [ name NEWNAME ]\n"
                "                         [ address LLADDR ]\n"
@@ -673,6 +674,17 @@ int iplink_parse(int argc, char **argv, struct iplink_req 
*req,
                                req->i.ifi_flags |= IFF_NOARP;
                        else
                                return on_off("arp", *argv);
+               } else if (strcmp(*argv, "carrier") == 0) {
+                       int carrier;
+                       NEXT_ARG();
+                       if (strcmp(*argv, "on") == 0)
+                               carrier = 1;
+                       else if (strcmp(*argv, "off") == 0)
+                               carrier = 0;
+                       else
+                               return on_off("carrier", *argv);
+
+                       addattr8(&req->n, sizeof(*req), IFLA_CARRIER, carrier);
                } else if (strcmp(*argv, "vf") == 0) {
                        struct rtattr *vflist;
 
-- 
1.8.3.1