qdev: Decouple qdev_prop_drive from DriveInfo

Make the property point to BlockDriverState, cutting out the DriveInfo
middleman.  This prepares the ground for block devices that don't have
a DriveInfo.

Currently all user-defined ones have a DriveInfo, because the only way
to define one is -drive & friends (they go through drive_init()).
DriveInfo is closely tied to -drive, and like -drive, it mixes
information about host and guest part of the block device.  I'm
working towards a new way to define block devices, with clean
host/guest separation, and I need to get DriveInfo out of the way for
that.

Fortunately, the device models are perfectly happy with
BlockDriverState, except for two places: ide_drive_initfn() and
scsi_disk_initfn() need to check the DriveInfo for a serial number set
with legacy -drive serial=...  Use drive_get_by_blockdev() there.

Device model code should now use DriveInfo only when explicitly
dealing with drives defined the old way, i.e. without -device.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

3 files changed, 18 insertions, 13 deletions

diff --git a/hw/ide/core.c b/hw/ide/core.c
index 0b3b7c2..cc4591b 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -2594,15 +2594,15 @@ void ide_bus_reset(IDEBus *bus)
     ide_clear_hob(bus);
 }
 
-void ide_init_drive(IDEState *s, DriveInfo *dinfo,
+void ide_init_drive(IDEState *s, BlockDriverState *bs,
                     const char *version, const char *serial)
 {
     int cylinders, heads, secs;
     uint64_t nb_sectors;
 
-    s->bs = dinfo->bdrv;
-    bdrv_get_geometry(s->bs, &nb_sectors);
-    bdrv_guess_geometry(s->bs, &cylinders, &heads, &secs);
+    s->bs = bs;
+    bdrv_get_geometry(bs, &nb_sectors);
+    bdrv_guess_geometry(bs, &cylinders, &heads, &secs);
     s->cylinders = cylinders;
     s->heads = heads;
     s->sectors = secs;
@@ -2613,11 +2613,11 @@ void ide_init_drive(IDEState *s, DriveInfo *dinfo,
     s->smart_autosave = 1;
     s->smart_errors = 0;
     s->smart_selftest_count = 0;
-    if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
+    if (bdrv_get_type_hint(bs) == BDRV_TYPE_CDROM) {
         s->is_cdrom = 1;
-        bdrv_set_change_cb(s->bs, cdrom_change_cb, s);
+        bdrv_set_change_cb(bs, cdrom_change_cb, s);
     }
-    if (serial && *serial) {
+    if (serial) {
         strncpy(s->drive_serial_str, serial, sizeof(s->drive_serial_str));
     } else {
         snprintf(s->drive_serial_str, sizeof(s->drive_serial_str),
@@ -2668,7 +2668,8 @@ 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, dinfo->serial);
+            ide_init_drive(&bus->ifs[i], dinfo->bdrv, NULL,
+                           *dinfo->serial ? dinfo->serial : NULL);
         } else {
             ide_reset(&bus->ifs[i]);
         }
diff --git a/hw/ide/internal.h b/hw/ide/internal.h
index eef1ee1..0125a9f 100644
--- a/hw/ide/internal.h
+++ b/hw/ide/internal.h
@@ -555,7 +555,7 @@ 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,
+void ide_init_drive(IDEState *s, BlockDriverState *bs,
                     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,
diff --git a/hw/ide/qdev.c b/hw/ide/qdev.c
index 127478b..a5fdab0 100644
--- a/hw/ide/qdev.c
+++ b/hw/ide/qdev.c
@@ -39,7 +39,7 @@ static int ide_qdev_init(DeviceState *qdev, DeviceInfo *base)
     IDEDeviceInfo *info = DO_UPCAST(IDEDeviceInfo, qdev, base);
     IDEBus *bus = DO_UPCAST(IDEBus, qbus, qdev->parent_bus);
 
-    if (!dev->conf.dinfo) {
+    if (!dev->conf.bs) {
         fprintf(stderr, "%s: no drive specified\n", qdev->info->name);
         goto err;
     }
@@ -83,7 +83,7 @@ IDEDevice *ide_create_drive(IDEBus *bus, int unit, DriveInfo *drive)
 
     dev = qdev_create(&bus->qbus, "ide-drive");
     qdev_prop_set_uint32(dev, "unit", unit);
-    qdev_prop_set_drive(dev, "drive", drive);
+    qdev_prop_set_drive(dev, "drive", drive->bdrv);
     qdev_init_nofail(dev);
     return DO_UPCAST(IDEDevice, qdev, dev);
 }
@@ -99,14 +99,18 @@ static int ide_drive_initfn(IDEDevice *dev)
     IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
     IDEState *s = bus->ifs + dev->unit;
     const char *serial;
+    DriveInfo *dinfo;
 
     serial = dev->serial;
     if (!serial) {
         /* try to fall back to value set with legacy -drive serial=... */
-        serial = dev->conf.dinfo->serial;
+        dinfo = drive_get_by_blockdev(dev->conf.bs);
+        if (*dinfo->serial) {
+            serial = dinfo->serial;
+        }
     }
 
-    ide_init_drive(s, dev->conf.dinfo, dev->version, serial);
+    ide_init_drive(s, dev->conf.bs, dev->version, serial);
 
     if (!dev->version) {
         dev->version = qemu_strdup(s->version);