Originally, ejecting a cdrom from a qemu guest entailed
passing 'eject cdrom' to the monitor. But since qemu
added the -drive option, more than one cdrom can be
specified, so just using 'cdrom' isn't explicit enough.
The attached patch updates media change/eject to use
the current qemu syntax. The new generated commands
look something like "eject ide0-cd1", with the name
derived from device target and bus type.
While I was in there I added support for inserting/
ejecting media from scsi cdroms and floppy devices.
This is built around my previous two patches:
- Fix cd eject segfault
- Attempt to detect cdrom change failures
Thanks,
Cole
diff --git a/src/qemu_driver.c b/src/qemu_driver.c
index 05e7402..a6fd53b 100644
--- a/src/qemu_driver.c
+++ b/src/qemu_driver.c
@@ -2948,48 +2948,107 @@ static int qemudDomainUndefine(virDomainPtr dom) {
return 0;
}
-static int qemudDomainChangeCDROM(virDomainPtr dom,
- virDomainObjPtr vm,
- virDomainDiskDefPtr olddisk,
- virDomainDiskDefPtr newdisk) {
+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 ret;
+
+ 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;
+ }
+
+ int idx = virDiskNameToIndex(newdisk->dst);
+ switch (newdisk->bus) {
+ /* Assume that if we are here, device targets don't exceed hypervisor
+ * limits, and we are already an appropriate device type */
+ case VIR_DOMAIN_DISK_BUS_IDE:
+ /* Device name of the form 'ide{0-1}-cd{0-1}' */
+ ret = asprintf(&devname, "ide%d-cd%d", ((idx - (idx % 2)) / 2),
+ (idx % 2));
+ break;
+ case VIR_DOMAIN_DISK_BUS_SCSI:
+ /* Device name of the form 'scsi{bus#}-cd{0-6}
+ * Each bus holds seven devs */
+ ret = asprintf(&devname, "scsi%d-cd%d", ((idx - (idx % 7)) / 7),
+ (idx % 7));
+ break;
+ case VIR_DOMAIN_DISK_BUS_FDC:
+ /* Device name is 'floppy{0-1}' */
+ ret = asprintf(&devname, "floppy%d", idx);
+ break;
+
+ default:
+ qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT,
+ _("Cannot hotplug device with bus '%s'"),
+ virDomainDiskBusTypeToString(newdisk->bus));
+ return -1;
+ }
+
+ if (!devname || ret == -1) {
+ 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"));
+ 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) {
+ if (asprintf (&cmd, "change %s \"%s\"", devname, safe_path) == -1) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED,
"%s", _("out of memory"));
VIR_FREE(safe_path);
+ VIR_FREE(devname);
return -1;
}
VIR_FREE(safe_path);
- } else if (asprintf(&cmd, "eject cdrom") == -1) {
+ } else if (asprintf(&cmd, "eject %s", devname) == -1) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED,
"%s", _("out of memory"));
+ VIR_FREE(devname);
return -1;
}
+ VIR_FREE(devname);
if (qemudMonitorCommand(driver, vm, cmd, &reply) < 0) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED,
"%s", _("cannot change cdrom media"));
VIR_FREE(cmd);
return -1;
}
/* 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,
_("changing cdrom media failed: %s"), reply);
@@ -3006,49 +3065,16 @@ static int qemudDomainChangeCDROM(virDomainPtr dom,
VIR_FREE(cmd);
return -1;
}
-
VIR_FREE(reply);
VIR_FREE(cmd);
- VIR_FREE(olddisk->src);
- olddisk->src = newdisk->src;
- newdisk->src = NULL;
- olddisk->type = newdisk->type;
+ VIR_FREE(origdisk->src);
+ origdisk->src = newdisk->src;
+ newdisk->src = NULL;
+ 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)
{
@@ -3202,10 +3228,11 @@ 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 &&
--
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