drive cleanup fixes.

Changes:
  * drive_uninit() wants a DriveInfo now.
  * drive_uninit() also calls bdrv_delete(),
    so callers don't need to do that.
  * drive_uninit() calls are moved over to the ->exit()
    callbacks, destroy_bdrvs() is zapped.
  * setting bdrv->private is not needed any more as the
    only user (destroy_bdrvs) is gone.
  * usb-storage needs no drive_uninit, scsi-disk will
    handle that.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

hw/device-hotplug.c

@@ -62,21 +62,3 @@ void destroy_nic(dev_match_fn *match_fn, void *arg)
         }
     }
 }
-
-void destroy_bdrvs(dev_match_fn *match_fn, void *arg)
-{
-    DriveInfo *dinfo;
-    struct BlockDriverState *bs;
-
-    QTAILQ_FOREACH(dinfo, &drives, next) {
-        bs = dinfo->bdrv;
-        if (bs) {
-            if (bs->private && match_fn(bs->private, arg)) {
-                drive_uninit(bs);
-                bdrv_delete(bs);
-            }
-        }
-    }
-}
-
-

hw/pci-hotplug.c

@@ -234,9 +234,6 @@ void pci_device_hot_remove_success(PCIDevice *d)
     class_code = d->config_read(d, PCI_CLASS_DEVICE+1, 1);
 
     switch(class_code) {
-    case PCI_BASE_CLASS_STORAGE:
-        destroy_bdrvs(pci_match_fn, d);
-        break;
     case PCI_BASE_CLASS_NETWORK:
         destroy_nic(pci_match_fn, d);
         break;

hw/scsi-disk.c

@@ -936,6 +936,13 @@ static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
     }
 }
 
+static void scsi_destroy(SCSIDevice *dev)
+{
+    SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
+
+    drive_uninit(s->dinfo);
+}
+
 static int scsi_disk_initfn(SCSIDevice *dev)
 {
     SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
@@ -969,6 +976,7 @@ static SCSIDeviceInfo scsi_disk_info = {
     .qdev.desc    = "virtual scsi disk or cdrom",
     .qdev.size    = sizeof(SCSIDiskState),
     .init         = scsi_disk_initfn,
+    .destroy      = scsi_destroy,
     .send_command = scsi_send_command,
     .read_data    = scsi_read_data,
     .write_data   = scsi_write_data,

hw/scsi-generic.c

@@ -668,6 +668,8 @@ static void scsi_destroy(SCSIDevice *d)
         qemu_free(r);
         r = n;
     }
+
+    drive_uninit(s->dinfo);
 }
 
 static int scsi_generic_initfn(SCSIDevice *dev)

hw/usb-msd.c

@@ -508,13 +508,6 @@ static int usb_msd_handle_data(USBDevice *dev, USBPacket *p)
     return ret;
 }
 
-static void usb_msd_handle_destroy(USBDevice *dev)
-{
-    MSDState *s = (MSDState *)dev;
-
-    drive_uninit(s->dinfo->bdrv);
-}
-
 static int usb_msd_initfn(USBDevice *dev)
 {
     MSDState *s = DO_UPCAST(MSDState, dev, dev);
@@ -599,7 +592,6 @@ static struct USBDeviceInfo msd_info = {
     .handle_reset   = usb_msd_handle_reset,
     .handle_control = usb_msd_handle_control,
     .handle_data    = usb_msd_handle_data,
-    .handle_destroy = usb_msd_handle_destroy,
     .qdev.props     = (Property[]) {
         DEFINE_PROP_DRIVE("drive", MSDState, dinfo),
         DEFINE_PROP_END_OF_LIST(),

hw/virtio-blk.c

@@ -504,7 +504,6 @@ VirtIODevice *virtio_blk_init(DeviceState *dev, DriveInfo *dinfo)
         strncpy(s->serial_str, ps, sizeof(s->serial_str));
     else
         snprintf(s->serial_str, sizeof(s->serial_str), "0");
-    s->bs->private = dev;
     bdrv_guess_geometry(s->bs, &cylinders, &heads, &secs);
     bdrv_set_geometry_hint(s->bs, cylinders, heads, secs);
 

hw/virtio-pci.c

@@ -458,6 +458,14 @@ static int virtio_blk_init_pci(PCIDevice *pci_dev)
     return 0;
 }
 
+static int virtio_blk_exit_pci(PCIDevice *pci_dev)
+{
+    VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
+
+    drive_uninit(proxy->dinfo);
+    return 0;
+}
+
 static int virtio_console_init_pci(PCIDevice *pci_dev)
 {
     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
@@ -519,6 +527,7 @@ static PCIDeviceInfo virtio_info[] = {
         .qdev.name = "virtio-blk-pci",
         .qdev.size = sizeof(VirtIOPCIProxy),
         .init      = virtio_blk_init_pci,
+        .exit      = virtio_blk_exit_pci,
         .qdev.props = (Property[]) {
             DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
             DEFINE_PROP_DRIVE("drive", VirtIOPCIProxy, dinfo),

sysemu.h

@@ -190,7 +190,7 @@ extern QTAILQ_HEAD(driveoptlist, DriveOpt) driveopts;
 extern DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit);
 extern DriveInfo *drive_get_by_id(const char *id);
 extern int drive_get_max_bus(BlockInterfaceType type);
-extern void drive_uninit(BlockDriverState *bdrv);
+extern void drive_uninit(DriveInfo *dinfo);
 extern const char *drive_get_serial(BlockDriverState *bdrv);
 extern BlockInterfaceErrorAction drive_get_onerror(BlockDriverState *bdrv);
 
@@ -205,7 +205,6 @@ typedef int (dev_match_fn)(void *dev_private, void *arg);
 
 DriveInfo *add_init_drive(const char *opts);
 void destroy_nic(dev_match_fn *match_fn, void *arg);
-void destroy_bdrvs(dev_match_fn *match_fn, void *arg);
 
 /* pci-hotplug */
 void pci_device_hot_add(Monitor *mon, const QDict *qdict);

vl.c

@@ -1979,18 +1979,12 @@ static void bdrv_format_print(void *opaque, const char *name)
     fprintf(stderr, " %s", name);
 }
 
-void drive_uninit(BlockDriverState *bdrv)
+void drive_uninit(DriveInfo *dinfo)
 {
-    DriveInfo *dinfo;
-
-    QTAILQ_FOREACH(dinfo, &drives, next) {
-        if (dinfo->bdrv != bdrv)
-            continue;
-        qemu_opts_del(dinfo->opts);
-        QTAILQ_REMOVE(&drives, dinfo, next);
-        qemu_free(dinfo);
-        break;
-    }
+    qemu_opts_del(dinfo->opts);
+    bdrv_delete(dinfo->bdrv);
+    QTAILQ_REMOVE(&drives, dinfo, next);
+    qemu_free(dinfo);
 }
 
 DriveInfo *drive_init(QemuOpts *opts, void *opaque,