ide: Turn drive serial into a qdev property ide-drive.serial

It needs to be a qdev property, because it belongs to the drive's
guest part.

Bonus: info qtree now shows the serial number.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

hw/ide/core.c

@@ -2596,7 +2596,8 @@ void ide_bus_reset(IDEBus *bus)
     ide_clear_hob(bus);
 }
 
-void ide_init_drive(IDEState *s, DriveInfo *dinfo, const char *version)
+void ide_init_drive(IDEState *s, DriveInfo *dinfo,
+                    const char *version, const char *serial)
 {
     int cylinders, heads, secs;
     uint64_t nb_sectors;
@@ -2618,9 +2619,9 @@ void ide_init_drive(IDEState *s, DriveInfo *dinfo, const char *version)
         s->is_cdrom = 1;
         bdrv_set_change_cb(s->bs, cdrom_change_cb, s);
     }
-    strncpy(s->drive_serial_str, drive_get_serial(s->bs),
-            sizeof(s->drive_serial_str));
-    if (!*s->drive_serial_str) {
+    if (serial && *serial) {
+        strncpy(s->drive_serial_str, serial, sizeof(s->drive_serial_str));
+    } else {
         snprintf(s->drive_serial_str, sizeof(s->drive_serial_str),
                  "QM%05d", s->drive_serial);
     }
@@ -2669,7 +2670,7 @@ void ide_init2_with_non_qdev_drives(IDEBus *bus, DriveInfo *hd0,
         dinfo = i == 0 ? hd0 : hd1;
         ide_init1(bus, i);
         if (dinfo) {
-            ide_init_drive(&bus->ifs[i], dinfo, NULL);
+            ide_init_drive(&bus->ifs[i], dinfo, NULL, dinfo->serial);
         } else {
             ide_reset(&bus->ifs[i]);
         }

hw/ide/internal.h

@@ -457,6 +457,7 @@ struct IDEDevice {
     uint32_t unit;
     BlockConf conf;
     char *version;
+    char *serial;
 };
 
 typedef int (*ide_qdev_initfn)(IDEDevice *dev);
@@ -554,7 +555,8 @@ uint32_t ide_data_readw(void *opaque, uint32_t addr);
 void ide_data_writel(void *opaque, uint32_t addr, uint32_t val);
 uint32_t ide_data_readl(void *opaque, uint32_t addr);
 
-void ide_init_drive(IDEState *s, DriveInfo *dinfo, const char *version);
+void ide_init_drive(IDEState *s, DriveInfo *dinfo,
+                    const char *version, const char *serial);
 void ide_init2(IDEBus *bus, qemu_irq irq);
 void ide_init2_with_non_qdev_drives(IDEBus *bus, DriveInfo *hd0,
                                     DriveInfo *hd1, qemu_irq irq);

hw/ide/qdev.c

@@ -99,7 +99,20 @@ typedef struct IDEDrive {
 static int ide_drive_initfn(IDEDevice *dev)
 {
     IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
-    ide_init_drive(bus->ifs + dev->unit, dev->conf.dinfo, dev->version);
+    IDEState *s = bus->ifs + dev->unit;
+    const char *serial;
+
+    serial = dev->serial;
+    if (!serial) {
+        /* try to fall back to value set with legacy -drive serial=... */
+        serial = dev->conf.dinfo->serial;
+    }
+
+    ide_init_drive(s, dev->conf.dinfo, dev->version, serial);
+
+    if (!dev->serial) {
+        dev->serial = qemu_strdup(s->drive_serial_str);
+    }
     return 0;
 }
 
@@ -111,6 +124,7 @@ static IDEDeviceInfo ide_drive_info = {
         DEFINE_PROP_UINT32("unit", IDEDrive, dev.unit, -1),
         DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf),
         DEFINE_PROP_STRING("ver",  IDEDrive, dev.version),
+        DEFINE_PROP_STRING("serial",  IDEDrive, dev.serial),
         DEFINE_PROP_END_OF_LIST(),
     }
 };