Allow the user to override the default disk model name "QEMU HARDDISK". Some Linux distributions use the /dev/disk/by-id/scsi-SATA_name-of-disk- model_serial addressing scheme when refering to partitions in /etc/fstab and elsewhere. This causes problems when starting a disk image taken from an existing physical server under qemu, because when running under qemu name-of-disk-model is always "QEMU HARDDISK". This patch introduces a model=s option which in combination with the existing serial=s option can be used to fake the disk the operating system was previously on, allowing the OS to boot properly. Cc: kwolf@redhat.com Signed-off-by: Floris Bos <dev@noc-ps.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
271 lines
7.2 KiB
C
271 lines
7.2 KiB
C
/*
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* ide bus support for qdev.
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*
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* Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <hw/hw.h>
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#include "dma.h"
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#include "qemu-error.h"
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#include <hw/ide/internal.h>
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#include "blockdev.h"
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#include "sysemu.h"
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/* --------------------------------- */
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static char *idebus_get_fw_dev_path(DeviceState *dev);
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static struct BusInfo ide_bus_info = {
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.name = "IDE",
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.size = sizeof(IDEBus),
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.get_fw_dev_path = idebus_get_fw_dev_path,
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.props = (Property[]) {
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DEFINE_PROP_UINT32("unit", IDEDevice, unit, -1),
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DEFINE_PROP_END_OF_LIST(),
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},
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};
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void ide_bus_new(IDEBus *idebus, DeviceState *dev, int bus_id)
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{
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qbus_create_inplace(&idebus->qbus, &ide_bus_info, dev, NULL);
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idebus->bus_id = bus_id;
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}
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static char *idebus_get_fw_dev_path(DeviceState *dev)
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{
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char path[30];
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snprintf(path, sizeof(path), "%s@%d", qdev_fw_name(dev),
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((IDEBus*)dev->parent_bus)->bus_id);
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return strdup(path);
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}
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static int ide_qdev_init(DeviceState *qdev)
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{
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IDEDevice *dev = IDE_DEVICE(qdev);
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IDEDeviceClass *dc = IDE_DEVICE_GET_CLASS(dev);
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IDEBus *bus = DO_UPCAST(IDEBus, qbus, qdev->parent_bus);
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if (!dev->conf.bs) {
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error_report("No drive specified");
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goto err;
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}
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if (dev->unit == -1) {
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dev->unit = bus->master ? 1 : 0;
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}
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switch (dev->unit) {
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case 0:
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if (bus->master) {
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error_report("IDE unit %d is in use", dev->unit);
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goto err;
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}
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bus->master = dev;
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break;
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case 1:
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if (bus->slave) {
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error_report("IDE unit %d is in use", dev->unit);
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goto err;
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}
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bus->slave = dev;
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break;
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default:
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error_report("Invalid IDE unit %d", dev->unit);
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goto err;
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}
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return dc->init(dev);
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err:
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return -1;
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}
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IDEDevice *ide_create_drive(IDEBus *bus, int unit, DriveInfo *drive)
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{
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DeviceState *dev;
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dev = qdev_create(&bus->qbus, drive->media_cd ? "ide-cd" : "ide-hd");
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qdev_prop_set_uint32(dev, "unit", unit);
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qdev_prop_set_drive_nofail(dev, "drive", drive->bdrv);
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qdev_init_nofail(dev);
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return DO_UPCAST(IDEDevice, qdev, dev);
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}
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void ide_get_bs(BlockDriverState *bs[], BusState *qbus)
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{
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IDEBus *bus = DO_UPCAST(IDEBus, qbus, qbus);
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bs[0] = bus->master ? bus->master->conf.bs : NULL;
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bs[1] = bus->slave ? bus->slave->conf.bs : NULL;
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}
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/* --------------------------------- */
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typedef struct IDEDrive {
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IDEDevice dev;
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} IDEDrive;
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static int ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind)
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{
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IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
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IDEState *s = bus->ifs + dev->unit;
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const char *serial;
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DriveInfo *dinfo;
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if (dev->conf.discard_granularity && dev->conf.discard_granularity != 512) {
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error_report("discard_granularity must be 512 for ide");
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return -1;
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}
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serial = dev->serial;
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if (!serial) {
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/* try to fall back to value set with legacy -drive serial=... */
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dinfo = drive_get_by_blockdev(dev->conf.bs);
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if (*dinfo->serial) {
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serial = dinfo->serial;
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}
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}
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if (ide_init_drive(s, dev->conf.bs, kind,
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dev->version, serial, dev->model) < 0) {
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return -1;
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}
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if (!dev->version) {
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dev->version = g_strdup(s->version);
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}
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if (!dev->serial) {
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dev->serial = g_strdup(s->drive_serial_str);
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}
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add_boot_device_path(dev->conf.bootindex, &dev->qdev,
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dev->unit ? "/disk@1" : "/disk@0");
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return 0;
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}
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static int ide_hd_initfn(IDEDevice *dev)
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{
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return ide_dev_initfn(dev, IDE_HD);
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}
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static int ide_cd_initfn(IDEDevice *dev)
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{
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return ide_dev_initfn(dev, IDE_CD);
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}
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static int ide_drive_initfn(IDEDevice *dev)
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{
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DriveInfo *dinfo = drive_get_by_blockdev(dev->conf.bs);
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return ide_dev_initfn(dev, dinfo->media_cd ? IDE_CD : IDE_HD);
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}
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#define DEFINE_IDE_DEV_PROPERTIES() \
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DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf), \
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DEFINE_PROP_STRING("ver", IDEDrive, dev.version), \
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DEFINE_PROP_STRING("serial", IDEDrive, dev.serial),\
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DEFINE_PROP_STRING("model", IDEDrive, dev.model)
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static Property ide_hd_properties[] = {
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DEFINE_IDE_DEV_PROPERTIES(),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void ide_hd_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
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k->init = ide_hd_initfn;
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dc->fw_name = "drive";
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dc->desc = "virtual IDE disk";
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dc->props = ide_hd_properties;
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}
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static TypeInfo ide_hd_info = {
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.name = "ide-hd",
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.parent = TYPE_IDE_DEVICE,
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.instance_size = sizeof(IDEDrive),
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.class_init = ide_hd_class_init,
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};
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static Property ide_cd_properties[] = {
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DEFINE_IDE_DEV_PROPERTIES(),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void ide_cd_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
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k->init = ide_cd_initfn;
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dc->fw_name = "drive";
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dc->desc = "virtual IDE CD-ROM";
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dc->props = ide_cd_properties;
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}
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static TypeInfo ide_cd_info = {
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.name = "ide-cd",
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.parent = TYPE_IDE_DEVICE,
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.instance_size = sizeof(IDEDrive),
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.class_init = ide_cd_class_init,
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};
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static Property ide_drive_properties[] = {
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DEFINE_IDE_DEV_PROPERTIES(),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void ide_drive_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
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k->init = ide_drive_initfn;
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dc->fw_name = "drive";
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dc->desc = "virtual IDE disk or CD-ROM (legacy)";
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dc->props = ide_drive_properties;
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}
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static TypeInfo ide_drive_info = {
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.name = "ide-drive",
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.parent = TYPE_IDE_DEVICE,
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.instance_size = sizeof(IDEDrive),
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.class_init = ide_drive_class_init,
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};
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static void ide_device_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *k = DEVICE_CLASS(klass);
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k->init = ide_qdev_init;
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k->bus_info = &ide_bus_info;
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}
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static TypeInfo ide_device_type_info = {
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.name = TYPE_IDE_DEVICE,
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.parent = TYPE_DEVICE,
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.instance_size = sizeof(IDEDevice),
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.abstract = true,
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.class_size = sizeof(IDEDeviceClass),
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.class_init = ide_device_class_init,
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};
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static void ide_register_types(void)
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{
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type_register_static(&ide_hd_info);
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type_register_static(&ide_cd_info);
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type_register_static(&ide_drive_info);
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type_register_static(&ide_device_type_info);
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}
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type_init(ide_register_types)
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