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Fix qemu media connect/eject to work with latest syntax. Add support for ejecting floppy devices and scsi cdroms.

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This commit is contained in:
Cole Robinson 2008-09-03 16:05:25 +00:00
parent fe7bb57a8b
commit e0b4fcc280
4 changed files with 171 additions and 55 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
Wed Sep 3 11:52:00 EST 2008 Cole Robinson <crobinso@redhat.com>
* src/domain_conf.c src/domain_conf.h src/qemu_driver.c:
Fix qemu media connect/eject to work with latest syntax. Add support
for ejecting floppy devices and scsi cdroms.
Wed Sep 3 10:57:00 EST 2008 Cole Robinson <crobinso@redhat.com>
* src/domain_conf.c src/domain_conf.h src/qemu_driver.c:

37
src/domain_conf.c
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@ -3411,5 +3411,42 @@ char *virDomainConfigFile(virConnectPtr conn,
return ret;
}
/* Translates a device name of the form (regex) "[fhv]d[a-z]+" into
* the corresponding bus,index combination (e.g. sda => (0,0), sdi (1,1),
* hdd => (1,1), vdaa => (0,27))
* @param disk The disk device
* @param busIdx parsed bus number
* @param devIdx parsed device number
* @return 0 on success, -1 on failure
*/
int virDiskNameToBusDeviceIndex(virDomainDiskDefPtr disk,
int *busIdx,
int *devIdx) {
int idx = virDiskNameToIndex(disk->dst);
if (idx < 1)
return -1;
switch (disk->bus) {
case VIR_DOMAIN_DISK_BUS_IDE:
*busIdx = idx / 2;
*devIdx = idx % 2;
break;
case VIR_DOMAIN_DISK_BUS_SCSI:
*busIdx = idx / 7;
*devIdx = idx % 7;
break;
case VIR_DOMAIN_DISK_BUS_FDC:
case VIR_DOMAIN_DISK_BUS_USB:
case VIR_DOMAIN_DISK_BUS_VIRTIO:
case VIR_DOMAIN_DISK_BUS_XEN:
default:
*busIdx = 0;
*devIdx = idx;
break;
}
return 0;
}
#endif /* ! PROXY */

4
src/domain_conf.h
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@ -555,6 +555,10 @@ char *virDomainConfigFile(virConnectPtr conn,
const char *dir,
const char *name);
int virDiskNameToBusDeviceIndex(virDomainDiskDefPtr disk,
int *busIdx,
int *devIdx);
virDomainNetDefPtr virDomainNetDefParseXML(virConnectPtr conn,
xmlNodePtr node);

179
src/qemu_driver.c
View File

@ -2936,36 +2936,137 @@ static int qemudDomainUndefine(virDomainPtr dom) {
return 0;
}
static int qemudDomainChangeCDROM(virDomainPtr dom,
virDomainObjPtr vm,
virDomainDiskDefPtr olddisk,
virDomainDiskDefPtr newdisk) {
/* Return the disks name for use in monitor commands */
static char *qemudDiskDeviceName(virDomainPtr dom,
virDomainDiskDefPtr disk) {
int busid, devid;
int ret;
char *devname;
if (virDiskNameToBusDeviceIndex(disk, &busid, &devid) < 0) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR,
_("cannot convert disk '%s' to bus/device index"),
disk->dst);
return NULL;
}
switch (disk->bus) {
case VIR_DOMAIN_DISK_BUS_IDE:
ret = asprintf(&devname, "ide%d-cd%d", busid, devid);
break;
case VIR_DOMAIN_DISK_BUS_SCSI:
ret = asprintf(&devname, "scsi%d-cd%d", busid, devid);
break;
case VIR_DOMAIN_DISK_BUS_FDC:
ret = asprintf(&devname, "floppy%d", devid);
break;
case VIR_DOMAIN_DISK_BUS_VIRTIO:
ret = asprintf(&devname, "virtio%d", devid);
break;
default:
qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT,
_("Unsupported disk name mapping for bus '%s'"),
virDomainDiskBusTypeToString(disk->bus));
return NULL;
}
if (ret == -1) {
qemudReportError(dom->conn, NULL, NULL, VIR_ERR_NO_MEMORY, NULL);
return NULL;
}
return devname;
}
static int qemudDomainChangeEjectableMedia(virDomainPtr dom,
virDomainDeviceDefPtr dev)
{
struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData;
virDomainObjPtr vm = virDomainFindByUUID(driver->domains, dom->uuid);
virDomainDiskDefPtr origdisk, newdisk;
char *cmd, *reply, *safe_path;
char *devname = NULL;
int qemuCmdFlags;
if (!vm) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN,
"%s", _("no domain with matching uuid"));
return -1;
}
newdisk = dev->data.disk;
origdisk = vm->def->disks;
while (origdisk) {
if (origdisk->bus == newdisk->bus &&
STREQ(origdisk->dst, newdisk->dst))
break;
origdisk = origdisk->next;
}
if (!origdisk) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR,
_("No device with bus '%s' and target '%s'"),
virDomainDiskBusTypeToString(newdisk->bus),
newdisk->dst);
return -1;
}
if (qemudExtractVersionInfo(vm->def->emulator,
NULL,
&qemuCmdFlags) < 0) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR,
_("Cannot determine QEMU argv syntax %s"),
vm->def->emulator);
return -1;
}
if (qemuCmdFlags & QEMUD_CMD_FLAG_DRIVE) {
if (!(devname = qemudDiskDeviceName(dom, newdisk)))
return -1;
} else {
/* Back compat for no -drive option */
if (newdisk->device == VIR_DOMAIN_DISK_DEVICE_FLOPPY)
devname = strdup(newdisk->dst);
else if (newdisk->device == VIR_DOMAIN_DISK_DEVICE_CDROM &&
STREQ(newdisk->dst, "hdc"))
devname = strdup("cdrom");
else {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR,
_("Emulator version does not support removable "
"media for device '%s' and target '%s'"),
virDomainDiskDeviceTypeToString(newdisk->device),
newdisk->dst);
return -1;
}
if (!devname) {
qemudReportError(dom->conn, NULL, NULL, VIR_ERR_NO_MEMORY, NULL);
return -1;
}
}
if (newdisk->src) {
safe_path = qemudEscapeMonitorArg(newdisk->src);
if (!safe_path) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED,
"%s", _("out of memory"));
qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_MEMORY, NULL);
VIR_FREE(devname);
return -1;
}
if (asprintf (&cmd, "change %s \"%s\"",
/* XXX qemu may support multiple CDROM in future */
/* olddisk->dst */ "cdrom",
safe_path) == -1) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED,
"%s", _("out of memory"));
if (asprintf (&cmd, "change %s \"%s\"", devname, safe_path) == -1) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_MEMORY, NULL);
VIR_FREE(safe_path);
VIR_FREE(devname);
return -1;
}
VIR_FREE(safe_path);
} else if (asprintf(&cmd, "eject cdrom") == -1) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED,
"%s", _("out of memory"));
} else if (asprintf(&cmd, "eject %s", devname) == -1) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_MEMORY, NULL);
VIR_FREE(devname);
return -1;
}
VIR_FREE(devname);
if (qemudMonitorCommand(driver, vm, cmd, &reply) < 0) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED,
@ -2977,7 +3078,7 @@ static int qemudDomainChangeCDROM(virDomainPtr dom,
/* If the command failed qemu prints:
* device not found, device is locked ...
* No message is printed on success it seems */
DEBUG ("cdrom change reply: %s", reply);
DEBUG ("ejectable media change reply: %s", reply);
if (strstr(reply, "\ndevice ")) {
qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED,
"%s", _("changing cdrom media failed"));
@ -2985,49 +3086,16 @@ static int qemudDomainChangeCDROM(virDomainPtr dom,
VIR_FREE(cmd);
return -1;
}
VIR_FREE(reply);
VIR_FREE(cmd);
VIR_FREE(olddisk->src);
olddisk->src = newdisk->src;
VIR_FREE(origdisk->src);
origdisk->src = newdisk->src;
newdisk->src = NULL;
olddisk->type = newdisk->type;
origdisk->type = newdisk->type;
return 0;
}
static int qemudDomainAttachCdromDevice(virDomainPtr dom,
virDomainDeviceDefPtr dev)
{
struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData;
virDomainObjPtr vm = virDomainFindByUUID(driver->domains, dom->uuid);
virDomainDiskDefPtr disk;
if (!vm) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN,
"%s", _("no domain with matching uuid"));
return -1;
}
disk = vm->def->disks;
while (disk) {
if (disk->device == VIR_DOMAIN_DISK_DEVICE_CDROM &&
STREQ(disk->dst, dev->data.disk->dst))
break;
disk = disk->next;
}
if (!disk) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT,
"%s", _("CDROM not attached, cannot change media"));
return -1;
}
if (qemudDomainChangeCDROM(dom, vm, disk, dev->data.disk) < 0) {
return -1;
}
return 0;
}
static int qemudDomainAttachUsbMassstorageDevice(virDomainPtr dom, virDomainDeviceDefPtr dev)
{
@ -3179,10 +3247,11 @@ static int qemudDomainAttachDevice(virDomainPtr dom,
}
if (dev->type == VIR_DOMAIN_DEVICE_DISK &&
dev->data.disk->device == VIR_DOMAIN_DISK_DEVICE_CDROM) {
ret = qemudDomainAttachCdromDevice(dom, dev);
(dev->data.disk->device == VIR_DOMAIN_DISK_DEVICE_CDROM ||
dev->data.disk->device == VIR_DOMAIN_DISK_DEVICE_FLOPPY)) {
ret = qemudDomainChangeEjectableMedia(dom, dev);
} else if (dev->type == VIR_DOMAIN_DEVICE_DISK &&
dev->data.disk->device == VIR_DOMAIN_DEVICE_DISK &&
dev->data.disk->device == VIR_DOMAIN_DISK_DEVICE_DISK &&
dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_USB) {
ret = qemudDomainAttachUsbMassstorageDevice(dom, dev);
} else if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV &&