qapi: Convert set_link

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>

hmp-commands.hx

@@ -1038,8 +1038,7 @@ ETEXI
         .args_type  = "name:s,up:b",
         .params     = "name on|off",
         .help       = "change the link status of a network adapter",
-        .user_print = monitor_user_noop,
-        .mhandler.cmd_new = do_set_link,
+        .mhandler.cmd = hmp_set_link,
     },
 
 STEXI

hmp.c

@@ -601,3 +601,13 @@ void hmp_inject_nmi(Monitor *mon, const QDict *qdict)
     qmp_inject_nmi(&errp);
     hmp_handle_error(mon, &errp);
 }
+
+void hmp_set_link(Monitor *mon, const QDict *qdict)
+{
+    const char *name = qdict_get_str(qdict, "name");
+    int up = qdict_get_bool(qdict, "up");
+    Error *errp = NULL;
+
+    qmp_set_link(name, up, &errp);
+    hmp_handle_error(mon, &errp);
+}

hmp.h

@@ -41,5 +41,6 @@ void hmp_memsave(Monitor *mon, const QDict *qdict);
 void hmp_pmemsave(Monitor *mon, const QDict *qdict);
 void hmp_cont(Monitor *mon, const QDict *qdict);
 void hmp_inject_nmi(Monitor *mon, const QDict *qdict);
+void hmp_set_link(Monitor *mon, const QDict *qdict);
 
 #endif

net.c

@@ -34,6 +34,7 @@
 #include "monitor.h"
 #include "qemu-common.h"
 #include "qemu_socket.h"
+#include "qmp-commands.h"
 #include "hw/qdev.h"
 #include "iov.h"
 
@@ -1258,12 +1259,10 @@ void do_info_network(Monitor *mon)
     }
 }
 
-int do_set_link(Monitor *mon, const QDict *qdict, QObject **ret_data)
+void qmp_set_link(const char *name, bool up, Error **errp)
 {
     VLANState *vlan;
     VLANClientState *vc = NULL;
-    const char *name = qdict_get_str(qdict, "name");
-    int up = qdict_get_bool(qdict, "up");
 
     QTAILQ_FOREACH(vlan, &vlans, next) {
         QTAILQ_FOREACH(vc, &vlan->clients, next) {
@@ -1280,8 +1279,8 @@ int do_set_link(Monitor *mon, const QDict *qdict, QObject **ret_data)
 done:
 
     if (!vc) {
-        qerror_report(QERR_DEVICE_NOT_FOUND, name);
-        return -1;
+        error_set(errp, QERR_DEVICE_NOT_FOUND, name);
+        return;
     }
 
     vc->link_down = !up;
@@ -1300,7 +1299,6 @@ done:
     if (vc->peer && vc->peer->info->link_status_changed) {
         vc->peer->info->link_status_changed(vc->peer);
     }
-    return 0;
 }
 
 void net_cleanup(void)

net.h

@@ -122,7 +122,6 @@ int qemu_find_nic_model(NICInfo *nd, const char * const *models,
                         const char *default_model);
 
 void do_info_network(Monitor *mon);
-int do_set_link(Monitor *mon, const QDict *qdict, QObject **ret_data);
 
 /* NIC info */
 

qapi-schema.json

@@ -979,3 +979,23 @@
 # Notes: Only x86 Virtual Machines support this command.
 ##
 { 'command': 'inject-nmi' }
+
+##
+# @set_link:
+#
+# Sets the link status of a virtual network adapter.
+#
+# @name: the device name of the virtual network adapter
+#
+# @up: true to set the link status to be up
+#
+# Returns: Nothing on success
+#          If @name is not a valid network device, DeviceNotFound
+#
+# Since: 0.14.0
+#
+# Notes: Not all network adapters support setting link status.  This command
+#        will succeed even if the network adapter does not support link status
+#        notification.
+##
+{ 'command': 'set_link', 'data': {'name': 'str', 'up': 'bool'} }

qmp-commands.hx

@@ -730,10 +730,7 @@ EQMP
     {
         .name       = "set_link",
         .args_type  = "name:s,up:b",
-        .params     = "name on|off",
-        .help       = "change the link status of a network adapter",
-        .user_print = monitor_user_noop,
-        .mhandler.cmd_new = do_set_link,
+        .mhandler.cmd_new = qmp_marshal_input_set_link,
     },
 
 SQMP