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https://gitlab.com/libvirt/libvirt.git
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Add disk attach/detach support to libxl driver
Based on the device attach/detach code from the QEMU driver, but using the new functions to create the structures associated. * src/libxl/libxl_driver.c: implements domainAttachDevice, domainAttachDeviceFlags, domainDetachDevice, domainDetachDeviceFlags and domainUpdateDeviceFlags
This commit is contained in:
Markus Groß
Daniel Veillard
parent
685753a360
commit
fffea7fed7
@ -2221,6 +2221,520 @@ libxlDomainUndefine(virDomainPtr dom)
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return ret;
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}
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static int
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libxlDomainChangeEjectableMedia(libxlDomainObjPrivatePtr priv,
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virDomainObjPtr vm, virDomainDiskDefPtr disk)
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{
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virDomainDiskDefPtr origdisk = NULL;
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libxl_device_disk x_disk;
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int i;
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int ret = -1;
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for (i = 0 ; i < vm->def->ndisks ; i++) {
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if (vm->def->disks[i]->bus == disk->bus &&
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STREQ(vm->def->disks[i]->dst, disk->dst)) {
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origdisk = vm->def->disks[i];
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break;
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}
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}
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if (!origdisk) {
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libxlError(VIR_ERR_INTERNAL_ERROR,
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_("No device with bus '%s' and target '%s'"),
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virDomainDiskBusTypeToString(disk->bus), disk->dst);
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goto cleanup;
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}
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if (origdisk->device != VIR_DOMAIN_DISK_DEVICE_CDROM) {
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libxlError(VIR_ERR_INTERNAL_ERROR,
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_("Removable media not supported for %s device"),
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virDomainDiskDeviceTypeToString(disk->device));
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return -1;
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}
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if (libxlMakeDisk(disk, &x_disk) < 0)
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goto cleanup;
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if ((ret = libxl_cdrom_insert(&priv->ctx, vm->def->id, &x_disk)) < 0) {
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libxlError(VIR_ERR_INTERNAL_ERROR,
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_("libxenlight failed to change media for disk '%s'"),
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disk->dst);
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goto cleanup;
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}
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VIR_FREE(origdisk->src);
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origdisk->src = disk->src;
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disk->src = NULL;
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origdisk->type = disk->type;
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virDomainDiskDefFree(disk);
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ret = 0;
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cleanup:
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return ret;
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}
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static int
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libxlDomainAttachDeviceDiskLive(libxlDomainObjPrivatePtr priv,
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virDomainObjPtr vm, virDomainDeviceDefPtr dev)
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{
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virDomainDiskDefPtr l_disk = dev->data.disk;
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libxl_device_disk x_disk;
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int ret = -1;
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switch (l_disk->device) {
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case VIR_DOMAIN_DISK_DEVICE_CDROM:
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ret = libxlDomainChangeEjectableMedia(priv, vm, l_disk);
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break;
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case VIR_DOMAIN_DISK_DEVICE_DISK:
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if (l_disk->bus == VIR_DOMAIN_DISK_BUS_XEN) {
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if (virDomainDiskIndexByName(vm->def, l_disk->dst) >= 0) {
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libxlError(VIR_ERR_OPERATION_FAILED,
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_("target %s already exists"), l_disk->dst);
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goto cleanup;
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}
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if (!l_disk->src) {
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libxlError(VIR_ERR_INTERNAL_ERROR,
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"%s", _("disk source path is missing"));
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goto cleanup;
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}
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if (VIR_REALLOC_N(vm->def->disks, vm->def->ndisks+1) < 0) {
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virReportOOMError();
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goto cleanup;
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}
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if (libxlMakeDisk(l_disk, &x_disk) < 0)
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goto cleanup;
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if ((ret = libxl_device_disk_add(&priv->ctx, vm->def->id,
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&x_disk)) < 0) {
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libxlError(VIR_ERR_INTERNAL_ERROR,
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_("libxenlight failed to attach disk '%s'"),
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l_disk->dst);
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goto cleanup;
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}
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virDomainDiskInsertPreAlloced(vm->def, l_disk);
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} else {
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libxlError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("disk bus '%s' cannot be hotplugged."),
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virDomainDiskBusTypeToString(l_disk->bus));
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}
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break;
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default:
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libxlError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("disk device type '%s' cannot be hotplugged"),
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virDomainDiskDeviceTypeToString(l_disk->device));
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break;
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}
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cleanup:
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return ret;
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}
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static int
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libxlDomainDetachDeviceDiskLive(libxlDomainObjPrivatePtr priv,
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virDomainObjPtr vm, virDomainDeviceDefPtr dev)
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{
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virDomainDiskDefPtr l_disk = NULL;
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libxl_device_disk x_disk;
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int i;
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int wait_secs = 2;
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int ret = -1;
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switch (dev->data.disk->device) {
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case VIR_DOMAIN_DISK_DEVICE_DISK:
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if (dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_XEN) {
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if ((i = virDomainDiskIndexByName(vm->def,
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dev->data.disk->dst)) < 0) {
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libxlError(VIR_ERR_OPERATION_FAILED,
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_("disk %s not found"), dev->data.disk->dst);
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goto cleanup;
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}
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l_disk = vm->def->disks[i];
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if (libxlMakeDisk(l_disk, &x_disk) < 0)
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goto cleanup;
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if ((ret = libxl_device_disk_del(&priv->ctx, &x_disk,
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wait_secs)) < 0) {
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libxlError(VIR_ERR_INTERNAL_ERROR,
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_("libxenlight failed to detach disk '%s'"),
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l_disk->dst);
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goto cleanup;
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}
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virDomainDiskRemove(vm->def, i);
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virDomainDiskDefFree(l_disk);
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} else {
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libxlError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("disk bus '%s' cannot be hot unplugged."),
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virDomainDiskBusTypeToString(l_disk->bus));
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}
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break;
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default:
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libxlError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("device type '%s' cannot hot unplugged"),
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virDomainDiskDeviceTypeToString(dev->data.disk->device));
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break;
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}
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cleanup:
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return ret;
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}
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static int
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libxlDomainAttachDeviceLive(libxlDomainObjPrivatePtr priv, virDomainObjPtr vm,
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virDomainDeviceDefPtr dev)
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{
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int ret = -1;
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switch (dev->type) {
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case VIR_DOMAIN_DEVICE_DISK:
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ret = libxlDomainAttachDeviceDiskLive(priv, vm, dev);
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if (!ret)
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dev->data.disk = NULL;
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break;
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default:
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libxlError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("device type '%s' cannot be attached"),
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virDomainDeviceTypeToString(dev->type));
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break;
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}
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return ret;
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}
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static int
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libxlDomainAttachDeviceConfig(virDomainDefPtr vmdef, virDomainDeviceDefPtr dev)
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{
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virDomainDiskDefPtr disk;
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switch (dev->type) {
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case VIR_DOMAIN_DEVICE_DISK:
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disk = dev->data.disk;
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if (virDomainDiskIndexByName(vmdef, disk->dst) >= 0) {
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libxlError(VIR_ERR_INVALID_ARG,
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_("target %s already exists."), disk->dst);
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return -1;
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}
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if (virDomainDiskInsert(vmdef, disk)) {
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virReportOOMError();
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return -1;
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}
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/* vmdef has the pointer. Generic codes for vmdef will do all jobs */
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dev->data.disk = NULL;
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break;
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default:
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libxlError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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_("persistent attach of device is not supported"));
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return -1;
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}
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return 0;
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}
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static int
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libxlDomainDetachDeviceLive(libxlDomainObjPrivatePtr priv, virDomainObjPtr vm,
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virDomainDeviceDefPtr dev)
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{
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int ret = -1;
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switch (dev->type) {
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case VIR_DOMAIN_DEVICE_DISK:
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ret = libxlDomainDetachDeviceDiskLive(priv, vm, dev);
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break;
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default:
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libxlError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("device type '%s' cannot be detached"),
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virDomainDeviceTypeToString(dev->type));
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break;
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}
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return ret;
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}
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static int
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libxlDomainDetachDeviceConfig(virDomainDefPtr vmdef, virDomainDeviceDefPtr dev)
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{
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virDomainDiskDefPtr disk;
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int ret = -1;
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switch (dev->type) {
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case VIR_DOMAIN_DEVICE_DISK:
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disk = dev->data.disk;
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if (virDomainDiskRemoveByName(vmdef, disk->dst)) {
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libxlError(VIR_ERR_INVALID_ARG,
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_("no target device %s"), disk->dst);
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break;
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}
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ret = 0;
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break;
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default:
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libxlError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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_("persistent detach of device is not supported"));
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break;
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}
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return ret;
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}
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static int
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libxlDomainUpdateDeviceLive(libxlDomainObjPrivatePtr priv,
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virDomainObjPtr vm, virDomainDeviceDefPtr dev)
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{
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virDomainDiskDefPtr disk;
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int ret = -1;
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switch (dev->type) {
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case VIR_DOMAIN_DEVICE_DISK:
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disk = dev->data.disk;
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switch (disk->device) {
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case VIR_DOMAIN_DISK_DEVICE_CDROM:
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ret = libxlDomainChangeEjectableMedia(priv, vm, disk);
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if (ret == 0)
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dev->data.disk = NULL;
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break;
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default:
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libxlError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("disk bus '%s' cannot be updated."),
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virDomainDiskBusTypeToString(disk->bus));
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break;
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}
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break;
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default:
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libxlError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("device type '%s' cannot be updated"),
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virDomainDeviceTypeToString(dev->type));
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break;
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}
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return ret;
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}
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static int
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libxlDomainUpdateDeviceConfig(virDomainDefPtr vmdef, virDomainDeviceDefPtr dev)
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{
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virDomainDiskDefPtr orig;
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virDomainDiskDefPtr disk;
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int i;
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int ret = -1;
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switch (dev->type) {
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case VIR_DOMAIN_DEVICE_DISK:
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disk = dev->data.disk;
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if ((i = virDomainDiskIndexByName(vmdef, disk->dst)) < 0) {
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libxlError(VIR_ERR_INVALID_ARG,
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_("target %s doesn't exists."), disk->dst);
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goto cleanup;
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}
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orig = vmdef->disks[i];
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if (!(orig->device == VIR_DOMAIN_DISK_DEVICE_CDROM)) {
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libxlError(VIR_ERR_INVALID_ARG,
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_("this disk doesn't support update"));
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goto cleanup;
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}
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VIR_FREE(orig->src);
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orig->src = disk->src;
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orig->type = disk->type;
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if (disk->driverName) {
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VIR_FREE(orig->driverName);
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orig->driverName = disk->driverName;
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disk->driverName = NULL;
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}
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if (disk->driverType) {
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VIR_FREE(orig->driverType);
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orig->driverType = disk->driverType;
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disk->driverType = NULL;
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}
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disk->src = NULL;
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break;
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default:
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libxlError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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_("persistent update of device is not supported"));
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goto cleanup;
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}
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ret = 0;
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cleanup:
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return ret;
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}
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/* Actions for libxlDomainModifyDeviceFlags */
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enum {
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LIBXL_DEVICE_ATTACH,
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LIBXL_DEVICE_DETACH,
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LIBXL_DEVICE_UPDATE,
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};
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static int
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libxlDomainModifyDeviceFlags(virDomainPtr dom, const char *xml,
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unsigned int flags, int action)
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{
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libxlDriverPrivatePtr driver = dom->conn->privateData;
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virDomainObjPtr vm = NULL;
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virDomainDefPtr vmdef = NULL;
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virDomainDeviceDefPtr dev = NULL;
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libxlDomainObjPrivatePtr priv;
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int ret = -1;
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virCheckFlags(VIR_DOMAIN_DEVICE_MODIFY_LIVE |
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VIR_DOMAIN_DEVICE_MODIFY_CONFIG, -1);
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libxlDriverLock(driver);
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vm = virDomainFindByUUID(&driver->domains, dom->uuid);
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if (!vm) {
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libxlError(VIR_ERR_NO_DOMAIN, "%s", _("no domain with matching uuid"));
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goto cleanup;
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}
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if (virDomainObjIsActive(vm)) {
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if (flags == VIR_DOMAIN_DEVICE_MODIFY_CURRENT)
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flags |= VIR_DOMAIN_DEVICE_MODIFY_LIVE;
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} else {
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if (flags == VIR_DOMAIN_DEVICE_MODIFY_CURRENT)
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flags |= VIR_DOMAIN_DEVICE_MODIFY_CONFIG;
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/* check consistency between flags and the vm state */
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if (flags & VIR_DOMAIN_DEVICE_MODIFY_LIVE) {
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libxlError(VIR_ERR_OPERATION_INVALID,
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"%s", _("Domain is not running"));
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goto cleanup;
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}
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}
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if ((flags & VIR_DOMAIN_DEVICE_MODIFY_CONFIG) && !vm->persistent) {
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libxlError(VIR_ERR_OPERATION_INVALID,
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"%s", _("cannot modify device on transient domain"));
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goto cleanup;
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}
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if (!(dev = virDomainDeviceDefParse(driver->caps, vm->def, xml,
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VIR_DOMAIN_XML_INACTIVE)))
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goto cleanup;
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priv = vm->privateData;
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if (flags & VIR_DOMAIN_DEVICE_MODIFY_CONFIG) {
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if (!(dev = virDomainDeviceDefParse(driver->caps, vm->def, xml,
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VIR_DOMAIN_XML_INACTIVE)))
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goto cleanup;
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/* Make a copy for updated domain. */
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if (!(vmdef = virDomainObjCopyPersistentDef(driver->caps, vm)))
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goto cleanup;
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switch (action) {
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case LIBXL_DEVICE_ATTACH:
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ret = libxlDomainAttachDeviceConfig(vmdef, dev);
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break;
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case LIBXL_DEVICE_DETACH:
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ret = libxlDomainDetachDeviceConfig(vmdef, dev);
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break;
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case LIBXL_DEVICE_UPDATE:
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ret = libxlDomainUpdateDeviceConfig(vmdef, dev);
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default:
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libxlError(VIR_ERR_INTERNAL_ERROR,
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_("unknown domain modify action %d"), action);
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break;
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}
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} else
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ret = 0;
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if (flags & VIR_DOMAIN_DEVICE_MODIFY_LIVE) {
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/* If dev exists it was created to modify the domain config. Free it. */
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virDomainDeviceDefFree(dev);
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if (!(dev = virDomainDeviceDefParse(driver->caps, vm->def, xml,
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VIR_DOMAIN_XML_INACTIVE)))
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goto cleanup;
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|
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switch (action) {
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case LIBXL_DEVICE_ATTACH:
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ret = libxlDomainAttachDeviceLive(priv, vm, dev);
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break;
|
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case LIBXL_DEVICE_DETACH:
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ret = libxlDomainDetachDeviceLive(priv, vm, dev);
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break;
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case LIBXL_DEVICE_UPDATE:
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ret = libxlDomainUpdateDeviceLive(priv, vm, dev);
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default:
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libxlError(VIR_ERR_INTERNAL_ERROR,
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_("unknown domain modify action %d"), action);
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break;
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}
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/*
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* update domain status forcibly because the domain status may be
|
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* changed even if we attach the device failed.
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*/
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if (virDomainSaveStatus(driver->caps, driver->stateDir, vm) < 0)
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ret = -1;
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}
|
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/* Finally, if no error until here, we can save config. */
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if (!ret && (flags & VIR_DOMAIN_DEVICE_MODIFY_CONFIG)) {
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ret = virDomainSaveConfig(driver->configDir, vmdef);
|
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if (!ret) {
|
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virDomainObjAssignDef(vm, vmdef, false);
|
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vmdef = NULL;
|
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}
|
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}
|
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|
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cleanup:
|
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virDomainDefFree(vmdef);
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virDomainDeviceDefFree(dev);
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if (vm)
|
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virDomainObjUnlock(vm);
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libxlDriverUnlock(driver);
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return ret;
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}
|
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|
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static int
|
||||
libxlDomainAttachDeviceFlags(virDomainPtr dom, const char *xml,
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||||
unsigned int flags)
|
||||
{
|
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return libxlDomainModifyDeviceFlags(dom, xml, flags, LIBXL_DEVICE_ATTACH);
|
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}
|
||||
|
||||
static int
|
||||
libxlDomainAttachDevice(virDomainPtr dom, const char *xml)
|
||||
{
|
||||
return libxlDomainAttachDeviceFlags(dom, xml,
|
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VIR_DOMAIN_DEVICE_MODIFY_LIVE);
|
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}
|
||||
|
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static int
|
||||
libxlDomainDetachDeviceFlags(virDomainPtr dom, const char *xml,
|
||||
unsigned int flags)
|
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{
|
||||
return libxlDomainModifyDeviceFlags(dom, xml, flags, LIBXL_DEVICE_DETACH);
|
||||
}
|
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|
||||
static int
|
||||
libxlDomainDetachDevice(virDomainPtr dom, const char *xml)
|
||||
{
|
||||
return libxlDomainDetachDeviceFlags(dom, xml,
|
||||
VIR_DOMAIN_DEVICE_MODIFY_LIVE);
|
||||
}
|
||||
|
||||
static int
|
||||
libxlDomainUpdateDeviceFlags(virDomainPtr dom, const char *xml,
|
||||
unsigned int flags)
|
||||
{
|
||||
return libxlDomainModifyDeviceFlags(dom, xml, flags, LIBXL_DEVICE_UPDATE);
|
||||
}
|
||||
|
||||
static unsigned long long
|
||||
libxlNodeGetFreeMemory(virConnectPtr conn)
|
||||
{
|
||||
@ -2743,6 +3257,11 @@ static virDriver libxlDriver = {
|
||||
.domainCreateWithFlags = libxlDomainCreateWithFlags, /* 0.9.0 */
|
||||
.domainDefineXML = libxlDomainDefineXML, /* 0.9.0 */
|
||||
.domainUndefine = libxlDomainUndefine, /* 0.9.0 */
|
||||
.domainAttachDevice = libxlDomainAttachDevice, /* 0.9.2 */
|
||||
.domainAttachDeviceFlags = libxlDomainAttachDeviceFlags, /* 0.9.2 */
|
||||
.domainDetachDevice = libxlDomainDetachDevice, /* 0.9.2 */
|
||||
.domainDetachDeviceFlags = libxlDomainDetachDeviceFlags, /* 0.9.2 */
|
||||
.domainUpdateDeviceFlags = libxlDomainUpdateDeviceFlags, /* 0.9.2 */
|
||||
.domainGetAutostart = libxlDomainGetAutostart, /* 0.9.0 */
|
||||
.domainSetAutostart = libxlDomainSetAutostart, /* 0.9.0 */
|
||||
.domainGetSchedulerType = libxlDomainGetSchedulerType, /* 0.9.0 */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user