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hotplug: more fixes for scsi disk hotplug. 

Changes:
 - create common scsi_hot_add function for adding a scsi disk to
   a adapter.
 - Add sanity checks.  You can't drive_add disks to the VGA any more.
 - Ignore the unit value calculated by drive_init, add a comment
   explaining why.  Review the patch to find the details ;)

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gerd Hoffmann 2009-10-14 15:30:22 +02:00 committed by Anthony Liguori
parent 5b684b5a56
commit 30d335d68d
1 changed files with 34 additions and 10 deletions
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44
hw/pci-hotplug.c
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@ -61,6 +61,33 @@ static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
}
static int scsi_hot_add(DeviceState *adapter, DriveInfo *dinfo, int printinfo)
{
SCSIBus *scsibus;
SCSIDevice *scsidev;
scsibus = DO_UPCAST(SCSIBus, qbus, QLIST_FIRST(&adapter->child_bus));
if (!scsibus || strcmp(scsibus->qbus.info->name, "SCSI") != 0) {
qemu_error("Device is not a SCSI adapter\n");
return -1;
}
/*
* drive_init() tries to find a default for dinfo->unit. Doesn't
* work at all for hotplug though as we assign the device to a
* specific bus instead of the first bus with spare scsi ids.
*
* Ditch the calculated value and reload from option string (if
* specified).
*/
dinfo->unit = qemu_opt_get_number(dinfo->opts, "unit", -1);
scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo, dinfo->unit);
if (printinfo)
qemu_error("OK bus %d, unit %d\n", scsibus->busnr, scsidev->id);
return 0;
}
void drive_hot_add(Monitor *mon, const QDict *qdict)
{
int dom, pci_bus;
@ -70,7 +97,6 @@ void drive_hot_add(Monitor *mon, const QDict *qdict)
DriveInfo *dinfo = NULL;
const char *pci_addr = qdict_get_str(qdict, "pci_addr");
const char *opts = qdict_get_str(qdict, "opts");
BusState *scsibus;
dinfo = add_init_drive(opts);
if (!dinfo)
@ -92,12 +118,9 @@ void drive_hot_add(Monitor *mon, const QDict *qdict)
monitor_printf(mon, "no pci device with address %s\n", pci_addr);
goto err;
}
scsibus = QLIST_FIRST(&dev->qdev.child_bus);
scsi_bus_legacy_add_drive(DO_UPCAST(SCSIBus, qbus, scsibus),
dinfo, dinfo->unit);
monitor_printf(mon, "OK bus %d, unit %d\n",
dinfo->bus,
dinfo->unit);
if (scsi_hot_add(&dev->qdev, dinfo, 1) != 0) {
goto err;
}
break;
case IF_NONE:
monitor_printf(mon, "OK\n");
@ -167,9 +190,10 @@ static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
if (qdev_init(&dev->qdev) < 0)
dev = NULL;
if (dev) {
BusState *scsibus = QLIST_FIRST(&dev->qdev.child_bus);
scsi_bus_legacy_add_drive(DO_UPCAST(SCSIBus, qbus, scsibus),
dinfo, dinfo->unit);
if (scsi_hot_add(&dev->qdev, dinfo, 0) != 0) {
qdev_unplug(&dev->qdev);
dev = NULL;
}
}
break;
case IF_VIRTIO: