PCI: Convert pci_device_hot_add() to QObject

Return a QDict with information about the just added device.

This commit should not change user output.

Please, note that this patch does not do error handling
conversion. In error conditions the handler still calls
monitor_printf().
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/pci-hotplug.c

@@ -33,6 +33,7 @@
 #include "scsi.h"
 #include "virtio-blk.h"
 #include "qemu-config.h"
+#include "qemu-objects.h"
 
 #if defined(TARGET_I386)
 static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
@@ -228,7 +229,36 @@ static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
     return dev;
 }
 
-void pci_device_hot_add(Monitor *mon, const QDict *qdict)
+void pci_device_hot_add_print(Monitor *mon, const QObject *data)
+{
+    QDict *qdict;
+
+    assert(qobject_type(data) == QTYPE_QDICT);
+    qdict = qobject_to_qdict(data);
+
+    monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
+                   (int) qdict_get_int(qdict, "domain"),
+                   (int) qdict_get_int(qdict, "bus"),
+                   (int) qdict_get_int(qdict, "slot"),
+                   (int) qdict_get_int(qdict, "function"));
+
+}
+
+/**
+ * pci_device_hot_add(): Hot add a PCI device
+ *
+ * Return a QDict with the following device information:
+ *
+ * - "domain": domain number
+ * - "bus": bus number
+ * - "slot": slot number
+ * - "function": function number
+ *
+ * Example:
+ *
+ * { "domain": 0, "bus": 0, "slot": 5, "function": 0 }
+ */
+void pci_device_hot_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
 {
     PCIDevice *dev = NULL;
     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
@@ -255,9 +285,11 @@ void pci_device_hot_add(Monitor *mon, const QDict *qdict)
         monitor_printf(mon, "invalid type: %s\n", type);
 
     if (dev) {
-        monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
-                       0, pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
-                       PCI_FUNC(dev->devfn));
+        *ret_data =
+        qobject_from_jsonf("{ 'domain': 0, 'bus': %d, 'slot': %d, "
+                           "'function': %d }", pci_bus_num(dev->bus),
+                           PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
+        assert(*ret_data != NULL);
     } else
         monitor_printf(mon, "failed to add %s\n", opts);
 }

qemu-monitor.hx

@@ -810,7 +810,8 @@ ETEXI
         .args_type  = "pci_addr:s,type:s,opts:s?",
         .params     = "auto|[[<domain>:]<bus>:]<slot> nic|storage [[vlan=n][,macaddr=addr][,model=type]] [file=file][,if=type][,bus=nr]...",
         .help       = "hot-add PCI device",
-        .mhandler.cmd = pci_device_hot_add,
+        .user_print = pci_device_hot_add_print,
+        .mhandler.cmd_new = pci_device_hot_add,
     },
 #endif
 

sysemu.h

@@ -212,7 +212,8 @@ extern DriveInfo *drive_init(QemuOpts *arg, void *machine, int *fatal_error);
 DriveInfo *add_init_drive(const char *opts);
 
 /* pci-hotplug */
-void pci_device_hot_add(Monitor *mon, const QDict *qdict);
+void pci_device_hot_add_print(Monitor *mon, const QObject *data);
+void pci_device_hot_add(Monitor *mon, const QDict *qdict, QObject **ret_data);
 void drive_hot_add(Monitor *mon, const QDict *qdict);
 void pci_device_hot_remove(Monitor *mon, const char *pci_addr);
 void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict,