Since both disks and disk controllers can be dynamically
added to the system, it makes sense to be also able to remove
them.
Signed-off-by: Wolfgang Mauerer <wolfgang.mauerer@xxxxxxxxxxx>
Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
---
src/domain_conf.h | 8 +++
src/qemu_driver.c | 161 +++++++++++++++++++++++++++++++++++++++++++++++-----
2 files changed, 153 insertions(+), 16 deletions(-)
diff --git a/src/domain_conf.h b/src/domain_conf.h
index 17f8b14..c7d49cf 100644
--- a/src/domain_conf.h
+++ b/src/domain_conf.h
@@ -149,6 +149,14 @@ virDiskHasValidPciAddr(virDomainDiskDefPtr def)
return def->pci_addr.domain || def->pci_addr.domain || def->pci_addr.slot;
}
+static inline int
+virDiskHasValidController(virDomainDiskDefPtr def)
+{
+ return def->controller_id != NULL ||
+ def->controller_pci_addr.domain || def->controller_pci_addr.domain
+ || def->controller_pci_addr.slot;
+}
+
/* Two types of disk backends */
enum virDomainFSType {
diff --git a/src/qemu_driver.c b/src/qemu_driver.c
index ddc46f6..5ac89a1 100644
--- a/src/qemu_driver.c
+++ b/src/qemu_driver.c
@@ -6204,32 +6204,31 @@ cleanup:
return ret;
}
-static int qemudDomainDetachPciDiskDevice(virConnectPtr conn,
- virDomainObjPtr vm, virDomainDeviceDefPtr dev)
+static int qemudDomainDetachDiskController(virConnectPtr conn,
+ virDomainObjPtr vm, virDomainDeviceDefPtr dev)
{
int i, ret = -1;
char *cmd = NULL;
char *reply = NULL;
- virDomainDiskDefPtr detach = NULL;
+ virDomainControllerDefPtr detach = NULL;
int tryOldSyntax = 0;
- for (i = 0 ; i < vm->def->ndisks ; i++) {
- if (STREQ(vm->def->disks[i]->dst, dev->data.disk->dst)) {
- detach = vm->def->disks[i];
+// virDomainControllerDefPtr is dev->data.controller
+ for (i = 0 ; i < vm->def->ncontrollers ; i++) {
+ if (vm->def->controllers[i]->pci_addr.domain ==
+ dev->data.controller->pci_addr.domain &&
+ vm->def->controllers[i]->pci_addr.bus ==
+ dev->data.controller->pci_addr.bus &&
+ vm->def->controllers[i]->pci_addr.slot ==
+ dev->data.controller->pci_addr.slot) {
+ detach = vm->def->controllers[i];
break;
}
}
if (!detach) {
qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED,
- _("disk %s not found"), dev->data.disk->dst);
- goto cleanup;
- }
-
- if (!virDiskHasValidPciAddr(detach)) {
- qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED,
- _("disk %s cannot be detached - no PCI address for device"),
- detach->dst);
+ _("Controller %s not found"), dev->data.disk->dst);
goto cleanup;
}
@@ -6251,7 +6250,9 @@ try_command:
if (qemudMonitorCommand(vm, cmd, &reply) < 0) {
qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED,
- _("failed to execute detach disk %s command"), detach->dst);
+ _("failed to execute detach controller %d:%d:%d " \
+ "command"), detach->pci_addr.domain,
+ detach->pci_addr.bus, detach->pci_addr.slot);
goto cleanup;
}
@@ -6267,6 +6268,124 @@ try_command:
if (strstr(reply, "invalid slot") ||
strstr(reply, "Invalid pci address")) {
qemudReportError (conn, NULL, NULL, VIR_ERR_OPERATION_FAILED,
+ _("failed to detach controller: invalid PCI address %.4x:%.2x:%.2x: %s"),
+ detach->pci_addr.domain,
+ detach->pci_addr.bus,
+ detach->pci_addr.slot,
+ reply);
+ goto cleanup;
+ }
+
+ if (vm->def->ncontrollers > 1) {
+ vm->def->controllers[i] = vm->def->controllers[--vm->def->ncontrollers];
+ if (VIR_REALLOC_N(vm->def->controllers, vm->def->ncontrollers) < 0) {
+ virReportOOMError(conn);
+ goto cleanup;
+ }
+ qsort(vm->def->disks, vm->def->ncontrollers,
+ sizeof(*vm->def->controllers),
+ virDomainControllerQSort);
+ } else {
+ VIR_FREE(vm->def->controllers[0]);
+ vm->def->controllers = 0;
+ }
+ ret = 0;
+
+cleanup:
+ VIR_FREE(reply);
+ VIR_FREE(cmd);
+ return ret;
+}
+
+static int qemudDomainDetachDiskDevice(virConnectPtr conn,
+ virDomainObjPtr vm, virDomainDeviceDefPtr dev)
+{
+ int i, ret = -1;
+ char *cmd = NULL;
+ char *reply = NULL;
+ const char* type;
+ virDomainDiskDefPtr detach = NULL;
+ int tryOldSyntax = 0;
+
+ /* If bus and unit are specified, use these first to identify
+ the disk */
+ if (dev->data.disk->controller_pci_addr.domain != -1) {
+ for (i = 0 ; i < vm->def->ndisks ; i++) {
+ if (dev->data.disk->bus_id != -1 &&
+ dev->data.disk->bus_id == vm->def->disks[i]->bus_id &&
+ dev->data.disk->unit_id != -1 &&
+ dev->data.disk->unit_id == vm->def->disks[i]->unit_id) {
+ detach = vm->def->disks[i];
+ break;
+ }
+ }
+ }
+
+ /* If the device did not specify a controller explicitely (and therefore
+ lacks a bus and unit specification), revert to the explicit target
+ device specification to identify a device for removal. */
+ if (!detach) {
+ for (i = 0 ; i < vm->def->ndisks ; i++) {
+ if (STREQ(vm->def->disks[i]->dst, dev->data.disk->dst)) {
+ detach = vm->def->disks[i];
+ break;
+ }
+ }
+ }
+
+ if (!detach) {
+ qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED,
+ _("disk %s not found"), dev->data.disk->dst);
+ goto cleanup;
+ }
+
+ if (!virDiskHasValidPciAddr(detach) && !virDiskHasValidController(detach)) {
+ qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED,
+ _("disk %s cannot be detached - no PCI address for device"),
+ detach->dst);
+ goto cleanup;
+ }
+
+ type = virDomainDiskBusTypeToString(detach->bus);
+
+try_command:
+ if (tryOldSyntax) {
+ if (virAsprintf(&cmd, "drive_del 0 %d:%d:%d bus=%d,unit=%d,if=%s",
+ detach->pci_addr.domain, detach->pci_addr.bus,
+ detach->pci_addr.slot, detach->bus_id,
+ detach->unit_id, type) < 0) {
+ virReportOOMError(conn);
+ goto cleanup;
+ }
+ } else {
+ if (virAsprintf(&cmd, "drive_del pci_addr=%d:%d:%d bus=%d,unit=%d,if=%s",
+ detach->pci_addr.domain,
+ detach->pci_addr.bus,
+ detach->pci_addr.slot, detach->bus_id,
+ detach->unit_id, type) < 0) {
+ virReportOOMError(conn);
+ goto cleanup;
+ }
+ }
+
+ if (qemudMonitorCommand(vm, cmd, &reply) < 0) {
+ qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED,
+ _("failed to execute detach disk %s command"), detach->dst);
+ goto cleanup;
+ }
+
+ DEBUG ("%s: drive_del reply: %s",vm->def->name, reply);
+
+ if (!tryOldSyntax &&
+ strstr(reply, "extraneous characters")) {
+ tryOldSyntax = 1;
+ goto try_command;
+ }
+ /* OK bux x, unit x is printed on success, but this does not provide
+ any new information to us.*/
+ if (strstr(reply, "Invalid pci address") ||
+ strstr(reply, "No pci device with address")) {
+ qemudReportError (conn, NULL, NULL, VIR_ERR_OPERATION_FAILED,
_("failed to detach disk %s: invalid PCI address %.4x:%.2x:%.2x: %s"),
detach->dst,
detach->pci_addr.domain,
@@ -6274,6 +6393,11 @@ try_command:
detach->pci_addr.slot,
reply);
goto cleanup;
+ } else if (strstr(reply, "Need to specify bus") ||
+ strstr(reply, "Need to specify unit")) {
+ qemudReportError (conn, NULL, NULL, VIR_ERR_OPERATION_FAILED,
+ _("failed to detach disk %s: bus and unit not (internal error)"),
+ detach->dst);
}
if (vm->def->ndisks > 1) {
@@ -6575,7 +6699,7 @@ static int qemudDomainDetachDevice(virDomainPtr dom,
dev->data.disk->device == VIR_DOMAIN_DISK_DEVICE_DISK &&
(dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_SCSI ||
dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_VIRTIO)) {
- ret = qemudDomainDetachPciDiskDevice(dom->conn, vm, dev);
+ ret = qemudDomainDetachDiskDevice(dom->conn, vm, dev);
if (driver->securityDriver)
driver->securityDriver->domainRestoreSecurityImageLabel(dom->conn, dev->data.disk);
if (qemuDomainSetDeviceOwnership(dom->conn, driver, dev, 1) < 0)
@@ -6584,6 +6708,11 @@ static int qemudDomainDetachDevice(virDomainPtr dom,
ret = qemudDomainDetachNetDevice(dom->conn, vm, dev);
} else if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV) {
ret = qemudDomainDetachHostDevice(dom->conn, driver, vm, dev);
+ } else if (dev->type == VIR_DOMAIN_DEVICE_CONTROLLER) {
+ /* NOTE: We can unplug the controller without having to
+ check if all disks are unplugged; it is at the user's
+ responsibility to use the required OS services first. */
+ ret = qemudDomainDetachDiskController(dom->conn, vm, dev);
} else
qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT,
"%s", _("only SCSI or virtio disk device can be detached dynamically"));
--
1.6.4
--
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