libvirt/src/qemu/qemu_alias.c
Pavel Hrdina ac97658d4f qemu: refactor qemuDomainMachine* functions
Introduce new wrapper functions without *Machine* in the function
name that take the whole virDomainDef structure as argument and
call the existing functions with *Machine* in the function name.

Change the arguments of existing functions to *machine* and *arch*
because they don't need the whole virDomainDef structure and they
could be used in places where we don't have virDomainDef.

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
2017-04-18 13:27:11 +02:00

648 lines
19 KiB
C

/*
* qemu_alias.c: QEMU alias manipulation
*
* Copyright (C) 2006-2016 Red Hat, Inc.
* Copyright (C) 2006 Daniel P. Berrange
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Author: Daniel P. Berrange <berrange@redhat.com>
*/
#include <config.h>
#include "qemu_alias.h"
#include "viralloc.h"
#include "virlog.h"
#include "virstring.h"
#include "network/bridge_driver.h"
#define QEMU_DRIVE_HOST_PREFIX "drive-"
#define VIR_FROM_THIS VIR_FROM_QEMU
VIR_LOG_INIT("qemu.qemu_alias");
int
qemuDomainDeviceAliasIndex(const virDomainDeviceInfo *info,
const char *prefix)
{
int idx;
if (!info->alias)
return -1;
if (!STRPREFIX(info->alias, prefix))
return -1;
if (virStrToLong_i(info->alias + strlen(prefix), NULL, 10, &idx) < 0)
return -1;
return idx;
}
static ssize_t
qemuGetNextChrDevIndex(virDomainDefPtr def,
virDomainChrDefPtr chr,
const char *prefix)
{
const virDomainChrDef **arrPtr;
size_t cnt;
size_t i;
ssize_t idx = 0;
const char *prefix2 = NULL;
if (chr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CONSOLE)
prefix2 = "serial";
virDomainChrGetDomainPtrs(def, chr->deviceType, &arrPtr, &cnt);
for (i = 0; i < cnt; i++) {
ssize_t thisidx;
if (((thisidx = qemuDomainDeviceAliasIndex(&arrPtr[i]->info, prefix)) < 0) &&
(prefix2 &&
(thisidx = qemuDomainDeviceAliasIndex(&arrPtr[i]->info, prefix2)) < 0)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Unable to determine device index for character device"));
return -1;
}
if (thisidx >= idx)
idx = thisidx + 1;
}
return idx;
}
int
qemuAssignDeviceChrAlias(virDomainDefPtr def,
virDomainChrDefPtr chr,
ssize_t idx)
{
const char *prefix = NULL;
switch ((virDomainChrDeviceType) chr->deviceType) {
case VIR_DOMAIN_CHR_DEVICE_TYPE_PARALLEL:
prefix = "parallel";
break;
case VIR_DOMAIN_CHR_DEVICE_TYPE_SERIAL:
prefix = "serial";
break;
case VIR_DOMAIN_CHR_DEVICE_TYPE_CONSOLE:
prefix = "console";
break;
case VIR_DOMAIN_CHR_DEVICE_TYPE_CHANNEL:
prefix = "channel";
break;
case VIR_DOMAIN_CHR_DEVICE_TYPE_LAST:
return -1;
}
if (idx == -1 && (idx = qemuGetNextChrDevIndex(def, chr, prefix)) < 0)
return -1;
return virAsprintf(&chr->info.alias, "%s%zd", prefix, idx);
}
int
qemuAssignDeviceControllerAlias(virDomainDefPtr domainDef,
virQEMUCapsPtr qemuCaps,
virDomainControllerDefPtr controller)
{
const char *prefix = virDomainControllerTypeToString(controller->type);
if (controller->type == VIR_DOMAIN_CONTROLLER_TYPE_PCI) {
if (!virQEMUCapsHasPCIMultiBus(qemuCaps, domainDef)) {
/* qemus that don't support multiple PCI buses have
* hardcoded the name of their single PCI controller as
* "pci".
*/
return VIR_STRDUP(controller->info.alias, "pci");
} else if (controller->model == VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT) {
/* The pcie-root controller on Q35 machinetypes uses a
* different naming convention ("pcie.0"), because it is
* hardcoded that way in qemu.
*/
return virAsprintf(&controller->info.alias, "pcie.%d", controller->idx);
}
/* All other PCI controllers use the consistent "pci.%u"
* (including the hardcoded pci-root controller on
* multibus-capable qemus).
*/
return virAsprintf(&controller->info.alias, "pci.%d", controller->idx);
} else if (controller->type == VIR_DOMAIN_CONTROLLER_TYPE_IDE) {
/* for any machine based on e.g. I440FX or G3Beige, the
* first (and currently only) IDE controller is an integrated
* controller hardcoded with id "ide"
*/
if (qemuDomainHasBuiltinIDE(domainDef) &&
controller->idx == 0)
return VIR_STRDUP(controller->info.alias, "ide");
} else if (controller->type == VIR_DOMAIN_CONTROLLER_TYPE_SATA) {
/* for any Q35 machine, the first SATA controller is the
* integrated one, and it too is hardcoded with id "ide"
*/
if (qemuDomainIsQ35(domainDef) && controller->idx == 0)
return VIR_STRDUP(controller->info.alias, "ide");
} else if (controller->type == VIR_DOMAIN_CONTROLLER_TYPE_USB) {
/* first USB device is "usb", others are normal "usb%d" */
if (controller->idx == 0)
return VIR_STRDUP(controller->info.alias, "usb");
}
/* all other controllers use the default ${type}${index} naming
* scheme for alias/id.
*/
return virAsprintf(&controller->info.alias, "%s%d", prefix, controller->idx);
}
/* Our custom -drive naming scheme used with id= */
int
qemuAssignDeviceDiskAlias(virDomainDefPtr def,
virDomainDiskDefPtr disk,
virQEMUCapsPtr qemuCaps)
{
const char *prefix = virDomainDiskBusTypeToString(disk->bus);
int controllerModel = -1;
if (disk->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DRIVE) {
if (disk->bus == VIR_DOMAIN_DISK_BUS_SCSI) {
controllerModel =
virDomainDeviceFindControllerModel(def, &disk->info,
VIR_DOMAIN_CONTROLLER_TYPE_SCSI);
if ((qemuDomainSetSCSIControllerModel(def, qemuCaps,
&controllerModel)) < 0)
return -1;
}
if (disk->bus != VIR_DOMAIN_DISK_BUS_SCSI ||
controllerModel == VIR_DOMAIN_CONTROLLER_MODEL_SCSI_LSILOGIC) {
if (virAsprintf(&disk->info.alias, "%s%d-%d-%d", prefix,
disk->info.addr.drive.controller,
disk->info.addr.drive.bus,
disk->info.addr.drive.unit) < 0)
return -1;
} else {
if (virAsprintf(&disk->info.alias, "%s%d-%d-%d-%d", prefix,
disk->info.addr.drive.controller,
disk->info.addr.drive.bus,
disk->info.addr.drive.target,
disk->info.addr.drive.unit) < 0)
return -1;
}
} else {
int idx = virDiskNameToIndex(disk->dst);
if (virAsprintf(&disk->info.alias, "%s-disk%d", prefix, idx) < 0)
return -1;
}
return 0;
}
int
qemuAssignDeviceHostdevAlias(virDomainDefPtr def,
char **alias,
int idx)
{
if (idx == -1) {
size_t i;
idx = 0;
for (i = 0; i < def->nhostdevs; i++) {
int thisidx;
if ((thisidx = qemuDomainDeviceAliasIndex(def->hostdevs[i]->info, "hostdev")) < 0)
continue; /* error just means the alias wasn't "hostdevN", but something else */
if (thisidx >= idx)
idx = thisidx + 1;
}
/* network interfaces can also have a hostdevN alias */
for (i = 0; i < def->nnets; i++) {
int thisidx;
if ((thisidx = qemuDomainDeviceAliasIndex(&def->nets[i]->info, "hostdev")) < 0)
continue;
if (thisidx >= idx)
idx = thisidx + 1;
}
}
if (virAsprintf(alias, "hostdev%d", idx) < 0)
return -1;
return 0;
}
int
qemuAssignDeviceNetAlias(virDomainDefPtr def,
virDomainNetDefPtr net,
int idx)
{
/* <interface type='hostdev'> uses "hostdevN" as the alias
* We must use "-1" as the index because the caller doesn't know
* that we're now looking for a unique hostdevN rather than netN
*/
if (networkGetActualType(net) == VIR_DOMAIN_NET_TYPE_HOSTDEV)
return qemuAssignDeviceHostdevAlias(def, &net->info.alias, -1);
if (idx == -1) {
size_t i;
idx = 0;
for (i = 0; i < def->nnets; i++) {
int thisidx;
if ((thisidx = qemuDomainDeviceAliasIndex(&def->nets[i]->info, "net")) < 0)
continue; /* failure could be due to "hostdevN" */
if (thisidx >= idx)
idx = thisidx + 1;
}
}
if (virAsprintf(&net->info.alias, "net%d", idx) < 0)
return -1;
return 0;
}
int
qemuAssignDeviceRedirdevAlias(virDomainDefPtr def,
virDomainRedirdevDefPtr redirdev,
int idx)
{
if (idx == -1) {
size_t i;
idx = 0;
for (i = 0; i < def->nredirdevs; i++) {
int thisidx;
if ((thisidx = qemuDomainDeviceAliasIndex(&def->redirdevs[i]->info, "redir")) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Unable to determine device index for redirected device"));
return -1;
}
if (thisidx >= idx)
idx = thisidx + 1;
}
}
if (virAsprintf(&redirdev->info.alias, "redir%d", idx) < 0)
return -1;
return 0;
}
int
qemuAssignDeviceRNGAlias(virDomainDefPtr def,
virDomainRNGDefPtr rng)
{
size_t i;
int maxidx = 0;
int idx;
for (i = 0; i < def->nrngs; i++) {
if ((idx = qemuDomainDeviceAliasIndex(&def->rngs[i]->info, "rng")) >= maxidx)
maxidx = idx + 1;
}
if (virAsprintf(&rng->info.alias, "rng%d", maxidx) < 0)
return -1;
return 0;
}
/**
* qemuAssignDeviceMemoryAlias:
* @def: domain definition. Necessary only if @oldAlias is true.
* @mem: memory device definition
* @oldAlias: Generate the alias according to the order of the device in @def
* rather than according to the slot number for legacy reasons.
*
* Generates alias for a memory device according to slot number if @oldAlias is
* false or according to order in @def->mems otherwise.
*
* Returns 0 on success, -1 on error.
*/
int
qemuAssignDeviceMemoryAlias(virDomainDefPtr def,
virDomainMemoryDefPtr mem,
bool oldAlias)
{
size_t i;
int maxidx = 0;
int idx;
const char *prefix;
if (mem->model == VIR_DOMAIN_MEMORY_MODEL_DIMM)
prefix = "dimm";
else
prefix = "nvdimm";
if (oldAlias) {
for (i = 0; i < def->nmems; i++) {
if ((idx = qemuDomainDeviceAliasIndex(&def->mems[i]->info, prefix)) >= maxidx)
maxidx = idx + 1;
}
} else {
maxidx = mem->info.addr.dimm.slot;
}
if (virAsprintf(&mem->info.alias, "%s%d", prefix, maxidx) < 0)
return -1;
return 0;
}
int
qemuAssignDeviceShmemAlias(virDomainDefPtr def,
virDomainShmemDefPtr shmem,
int idx)
{
if (idx == -1) {
size_t i;
idx = 0;
for (i = 0; i < def->nshmems; i++) {
int thisidx;
if ((thisidx = qemuDomainDeviceAliasIndex(&def->shmems[i]->info,
"shmem")) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Unable to determine device index "
"for shmem device"));
return -1;
}
if (thisidx >= idx)
idx = thisidx + 1;
}
}
if (virAsprintf(&shmem->info.alias, "shmem%d", idx) < 0)
return -1;
return 0;
}
int
qemuAssignDeviceAliases(virDomainDefPtr def, virQEMUCapsPtr qemuCaps)
{
size_t i;
for (i = 0; i < def->ndisks; i++) {
if (qemuAssignDeviceDiskAlias(def, def->disks[i], qemuCaps) < 0)
return -1;
}
for (i = 0; i < def->nnets; i++) {
if (qemuAssignDeviceNetAlias(def, def->nets[i], -1) < 0)
return -1;
}
for (i = 0; i < def->nfss; i++) {
if (virAsprintf(&def->fss[i]->info.alias, "fs%zu", i) < 0)
return -1;
}
for (i = 0; i < def->nsounds; i++) {
if (virAsprintf(&def->sounds[i]->info.alias, "sound%zu", i) < 0)
return -1;
}
for (i = 0; i < def->nhostdevs; i++) {
/* we can't start assigning at 0, since netdevs may have used
* up some hostdevN entries already. Also if the HostdevDef is
* linked to a NetDef, they will share an info and the alias
* will already be set, so don't try to set it again.
*/
if (!def->hostdevs[i]->info->alias &&
qemuAssignDeviceHostdevAlias(def, &def->hostdevs[i]->info->alias, -1) < 0)
return -1;
}
for (i = 0; i < def->nredirdevs; i++) {
if (qemuAssignDeviceRedirdevAlias(def, def->redirdevs[i], i) < 0)
return -1;
}
for (i = 0; i < def->nvideos; i++) {
if (virAsprintf(&def->videos[i]->info.alias, "video%zu", i) < 0)
return -1;
}
for (i = 0; i < def->ncontrollers; i++) {
if (qemuAssignDeviceControllerAlias(def, qemuCaps, def->controllers[i]) < 0)
return -1;
}
for (i = 0; i < def->ninputs; i++) {
if (virAsprintf(&def->inputs[i]->info.alias, "input%zu", i) < 0)
return -1;
}
for (i = 0; i < def->nparallels; i++) {
if (qemuAssignDeviceChrAlias(def, def->parallels[i], i) < 0)
return -1;
}
for (i = 0; i < def->nserials; i++) {
if (qemuAssignDeviceChrAlias(def, def->serials[i], i) < 0)
return -1;
}
for (i = 0; i < def->nchannels; i++) {
if (qemuAssignDeviceChrAlias(def, def->channels[i], i) < 0)
return -1;
}
for (i = 0; i < def->nconsoles; i++) {
if (qemuAssignDeviceChrAlias(def, def->consoles[i], i) < 0)
return -1;
}
for (i = 0; i < def->nhubs; i++) {
if (virAsprintf(&def->hubs[i]->info.alias, "hub%zu", i) < 0)
return -1;
}
for (i = 0; i < def->nshmems; i++) {
if (qemuAssignDeviceShmemAlias(def, def->shmems[i], i) < 0)
return -1;
}
for (i = 0; i < def->nsmartcards; i++) {
if (virAsprintf(&def->smartcards[i]->info.alias, "smartcard%zu", i) < 0)
return -1;
}
if (def->watchdog) {
if (virAsprintf(&def->watchdog->info.alias, "watchdog%d", 0) < 0)
return -1;
}
if (def->memballoon) {
if (virAsprintf(&def->memballoon->info.alias, "balloon%d", 0) < 0)
return -1;
}
for (i = 0; i < def->nrngs; i++) {
if (virAsprintf(&def->rngs[i]->info.alias, "rng%zu", i) < 0)
return -1;
}
if (def->tpm) {
if (virAsprintf(&def->tpm->info.alias, "tpm%d", 0) < 0)
return -1;
}
for (i = 0; i < def->nmems; i++) {
if (qemuAssignDeviceMemoryAlias(NULL, def->mems[i], false) < 0)
return -1;
}
return 0;
}
/* qemuAliasFromDisk
* @disk: Pointer to a disk definition
*
* Generate and return an alias for the device disk '-drive'
*
* Returns NULL with error or a string containing the alias
*/
char *
qemuAliasFromDisk(const virDomainDiskDef *disk)
{
char *ret;
if (!disk->info.alias) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("disk does not have an alias"));
return NULL;
}
ignore_value(virAsprintf(&ret, "%s%s", QEMU_DRIVE_HOST_PREFIX,
disk->info.alias));
return ret;
}
/* qemuAliasDiskDriveSkipPrefix:
* @dev_name: Pointer to a const char string
*
* If the QEMU_DRIVE_HOST_PREFIX exists in the input string, then
* increment the pointer and return it
*/
const char *
qemuAliasDiskDriveSkipPrefix(const char *dev_name)
{
if (STRPREFIX(dev_name, QEMU_DRIVE_HOST_PREFIX))
dev_name += strlen(QEMU_DRIVE_HOST_PREFIX);
return dev_name;
}
/* qemuAliasFromHostdev
* @hostdev: Pointer to host device
*
* Generate and return a string containing a drive alias
*/
char *
qemuAliasFromHostdev(const virDomainHostdevDef *hostdev)
{
char *ret;
if (!hostdev->info->alias) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("hostdev does not have an alias"));
return NULL;
}
ignore_value(virAsprintf(&ret, "%s-%s",
virDomainDeviceAddressTypeToString(hostdev->info->type),
hostdev->info->alias));
return ret;
}
/* qemuDomainGetMasterKeyAlias:
*
* Generate and return the masterKey alias
*
* Returns NULL or a string containing the master key alias
*/
char *
qemuDomainGetMasterKeyAlias(void)
{
char *alias;
ignore_value(VIR_STRDUP(alias, "masterKey0"));
return alias;
}
/* qemuDomainGetSecretAESAlias:
* @srcalias: Source alias used to generate the secret alias
* @isLuks: True when we are generating a secret for LUKS encrypt/decrypt
*
* Generate and return an alias for the encrypted secret
*
* Returns NULL or a string containing the alias
*/
char *
qemuDomainGetSecretAESAlias(const char *srcalias,
bool isLuks)
{
char *alias;
if (!srcalias) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("encrypted secret alias requires valid source alias"));
return NULL;
}
if (isLuks)
ignore_value(virAsprintf(&alias, "%s-luks-secret0", srcalias));
else
ignore_value(virAsprintf(&alias, "%s-secret0", srcalias));
return alias;
}
/* qemuAliasTLSObjFromSrcAlias
* @srcAlias: Pointer to a source alias string
*
* Generate and return a string to be used as the TLS object alias
*/
char *
qemuAliasTLSObjFromSrcAlias(const char *srcAlias)
{
char *ret;
ignore_value(virAsprintf(&ret, "obj%s_tls0", srcAlias));
return ret;
}
/* qemuAliasChardevFromDevAlias:
* @devAlias: pointer do device alias
*
* Generate and return a string to be used as chardev alias.
*/
char *
qemuAliasChardevFromDevAlias(const char *devAlias)
{
char *ret;
ignore_value(virAsprintf(&ret, "char%s", devAlias));
return ret;
}