monitor: Use argument type 'b' for set_link

Second argument is now "on" or "off" instead of "up" or "down".
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>

net.c

@@ -1276,7 +1276,7 @@ void do_set_link(Monitor *mon, const QDict *qdict)
     VLANState *vlan;
     VLANClientState *vc = NULL;
     const char *name = qdict_get_str(qdict, "name");
-    const char *up_or_down = qdict_get_str(qdict, "up_or_down");
+    int up = qdict_get_bool(qdict, "up");
 
     QTAILQ_FOREACH(vlan, &vlans, next) {
         QTAILQ_FOREACH(vc, &vlan->clients, next) {
@@ -1293,13 +1293,7 @@ done:
         return;
     }
 
-    if (strcmp(up_or_down, "up") == 0)
-        vc->link_down = 0;
-    else if (strcmp(up_or_down, "down") == 0)
-        vc->link_down = 1;
-    else
-        monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
-                       "valid\n", up_or_down);
+    vc->link_down = !up;
 
     if (vc->info->link_status_changed) {
         vc->info->link_status_changed(vc);

qemu-monitor.hx

@@ -986,16 +986,16 @@ ETEXI
 
     {
         .name       = "set_link",
-        .args_type  = "name:s,up_or_down:s",
-        .params     = "name up|down",
+        .args_type  = "name:s,up:b",
+        .params     = "name on|off",
         .help       = "change the link status of a network adapter",
         .mhandler.cmd = do_set_link,
     },
 
 STEXI
-@item set_link @var{name} [up|down]
+@item set_link @var{name} [on|off]
 @findex set_link
-Set link @var{name} up or down.
+Switch link @var{name} on (i.e. up) or off (i.e. down).
 ETEXI
 
     {