From 759fdd7b7ea2f90a463d4bc766f9c53053498c58 Mon Sep 17 00:00:00 2001
From: Wolfgang Bumiller <w.bumiller@proxmox.com>
Date: Wed, 9 Dec 2015 16:34:41 +0100
Subject: [PATCH 24/48] qmp: add get_link_status

---
 net/net.c        | 27 +++++++++++++++++++++++++++
 qapi-schema.json | 16 ++++++++++++++++
 2 files changed, 43 insertions(+)

diff --git a/net/net.c b/net/net.c
index 0ac3b9e..7410c1e 100644
--- a/net/net.c
+++ b/net/net.c
@@ -1373,6 +1373,33 @@ void hmp_info_network(Monitor *mon, const QDict *qdict)
     }
 }
 
+int64_t qmp_get_link_status(const char *name, Error **errp)
+{
+    NetClientState *ncs[MAX_QUEUE_NUM];
+    NetClientState *nc;
+    int queues;
+    bool ret;
+
+    queues = qemu_find_net_clients_except(name, ncs,
+                                          NET_CLIENT_DRIVER__MAX,
+                                          MAX_QUEUE_NUM);
+
+    if (queues == 0) {
+        error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
+                  "Device '%s' not found", name);
+        return (int64_t) -1;
+    }
+
+    nc = ncs[0];
+    ret = ncs[0]->link_down;
+
+    if (nc->peer->info->type == NET_CLIENT_DRIVER_NIC) {
+      ret = ncs[0]->peer->link_down;
+    }
+
+    return (int64_t) ret ? 0 : 1;
+}
+
 void qmp_set_link(const char *name, bool up, Error **errp)
 {
     NetClientState *ncs[MAX_QUEUE_NUM];
diff --git a/qapi-schema.json b/qapi-schema.json
index c33ebb3..79bfd97 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -56,6 +56,7 @@
 { 'pragma': {
     # Commands allowed to return a non-dictionary:
     'returns-whitelist': [
+        'get_link_status',
         'human-monitor-command',
         'qom-get',
         'query-migrate-cache-size',
@@ -2627,6 +2628,21 @@
 { 'command': 'set_link', 'data': {'name': 'str', 'up': 'bool'} }
 
 ##
+# @get_link_status:
+#
+# Get the current link state of the nics or nic.
+#
+# @name: name of the nic you get the state of
+#
+# Return: If link is up 1
+#         If link is down 0
+#         If an error occure an empty string.
+#
+# Notes: this is an Proxmox VE extension and not offical part of Qemu.
+##
+{ 'command': 'get_link_status', 'data': {'name': 'str'}, 'returns': 'int'}
+
+##
 # @balloon:
 #
 # Request the balloon driver to change its balloon size.
-- 
2.1.4

