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libvirt/src/libvirt-domain.c
Peter Krempa 4661a1868b docs: Document limitation of maximum vcpu count used with <topology> 
qemu requires that the topology equals to the maximum vcpu count.
Document this along with the API to set maximum vcpu count and the XML
element.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1426220
2017-04-05 09:00:44 +02:00

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/*
* libvirt-domain.c: entry points for virDomainPtr APIs
*
* Copyright (C) 2006-2015 Red Hat, Inc.
*
* 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/>.
*/
#include <config.h>
#include <sys/stat.h>
#include "intprops.h"
#include "datatypes.h"
#include "viralloc.h"
#include "virfile.h"
#include "virlog.h"
#include "virtypedparam.h"
VIR_LOG_INIT("libvirt.domain");
#define VIR_FROM_THIS VIR_FROM_DOMAIN
/**
* virConnectListDomains:
* @conn: pointer to the hypervisor connection
* @ids: array to collect the list of IDs of active domains
* @maxids: size of @ids
*
* Collect the list of active domains, and store their IDs in array @ids
*
* For inactive domains, see virConnectListDefinedDomains(). For more
* control over the results, see virConnectListAllDomains().
*
* Returns the number of domains found or -1 in case of error. Note that
* this command is inherently racy; a domain can be started between a
* call to virConnectNumOfDomains() and this call; you are only guaranteed
* that all currently active domains were listed if the return is less
* than @maxids.
*/
int
virConnectListDomains(virConnectPtr conn, int *ids, int maxids)
{
VIR_DEBUG("conn=%p, ids=%p, maxids=%d", conn, ids, maxids);
virResetLastError();
virCheckConnectReturn(conn, -1);
virCheckNonNullArgGoto(ids, error);
virCheckNonNegativeArgGoto(maxids, error);
if (conn->driver->connectListDomains) {
int ret = conn->driver->connectListDomains(conn, ids, maxids);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virConnectNumOfDomains:
* @conn: pointer to the hypervisor connection
*
* Provides the number of active domains.
*
* Returns the number of domain found or -1 in case of error
*/
int
virConnectNumOfDomains(virConnectPtr conn)
{
VIR_DEBUG("conn=%p", conn);
virResetLastError();
virCheckConnectReturn(conn, -1);
if (conn->driver->connectNumOfDomains) {
int ret = conn->driver->connectNumOfDomains(conn);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainGetConnect:
* @dom: pointer to a domain
*
* Provides the connection pointer associated with a domain. The
* reference counter on the connection is not increased by this
* call.
*
* WARNING: When writing libvirt bindings in other languages, do
* not use this function. Instead, store the connection and
* the domain object together.
*
* Returns the virConnectPtr or NULL in case of failure.
*/
virConnectPtr
virDomainGetConnect(virDomainPtr dom)
{
VIR_DOMAIN_DEBUG(dom);
virResetLastError();
virCheckDomainReturn(dom, NULL);
return dom->conn;
}
/**
* virDomainCreateXML:
* @conn: pointer to the hypervisor connection
* @xmlDesc: string containing an XML description of the domain
* @flags: bitwise-OR of supported virDomainCreateFlags
*
* Launch a new guest domain, based on an XML description similar
* to the one returned by virDomainGetXMLDesc()
* This function may require privileged access to the hypervisor.
* The domain is not persistent, so its definition will disappear when it
* is destroyed, or if the host is restarted (see virDomainDefineXML() to
* define persistent domains).
*
* If the VIR_DOMAIN_START_PAUSED flag is set, the guest domain
* will be started, but its CPUs will remain paused. The CPUs
* can later be manually started using virDomainResume.
*
* If the VIR_DOMAIN_START_AUTODESTROY flag is set, the guest
* domain will be automatically destroyed when the virConnectPtr
* object is finally released. This will also happen if the
* client application crashes / loses its connection to the
* libvirtd daemon. Any domains marked for auto destroy will
* block attempts at migration, save-to-file, or snapshots.
*
* virDomainFree should be used to free the resources after the
* domain object is no longer needed.
*
* Returns a new domain object or NULL in case of failure
*/
virDomainPtr
virDomainCreateXML(virConnectPtr conn, const char *xmlDesc,
unsigned int flags)
{
VIR_DEBUG("conn=%p, xmlDesc=%s, flags=%x", conn, NULLSTR(xmlDesc), flags);
virResetLastError();
virCheckConnectReturn(conn, NULL);
virCheckNonNullArgGoto(xmlDesc, error);
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainCreateXML) {
virDomainPtr ret;
ret = conn->driver->domainCreateXML(conn, xmlDesc, flags);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return NULL;
}
/**
* virDomainCreateXMLWithFiles:
* @conn: pointer to the hypervisor connection
* @xmlDesc: string containing an XML description of the domain
* @nfiles: number of file descriptors passed
* @files: list of file descriptors passed
* @flags: bitwise-OR of supported virDomainCreateFlags
*
* Launch a new guest domain, based on an XML description similar
* to the one returned by virDomainGetXMLDesc()
* This function may require privileged access to the hypervisor.
* The domain is not persistent, so its definition will disappear when it
* is destroyed, or if the host is restarted (see virDomainDefineXML() to
* define persistent domains).
*
* @files provides an array of file descriptors which will be
* made available to the 'init' process of the guest. The file
* handles exposed to the guest will be renumbered to start
* from 3 (ie immediately following stderr). This is only
* supported for guests which use container based virtualization
* technology.
*
* If the VIR_DOMAIN_START_PAUSED flag is set, the guest domain
* will be started, but its CPUs will remain paused. The CPUs
* can later be manually started using virDomainResume.
*
* If the VIR_DOMAIN_START_AUTODESTROY flag is set, the guest
* domain will be automatically destroyed when the virConnectPtr
* object is finally released. This will also happen if the
* client application crashes / loses its connection to the
* libvirtd daemon. Any domains marked for auto destroy will
* block attempts at migration, save-to-file, or snapshots.
*
* virDomainFree should be used to free the resources after the
* domain object is no longer needed.
*
* Returns a new domain object or NULL in case of failure
*/
virDomainPtr
virDomainCreateXMLWithFiles(virConnectPtr conn, const char *xmlDesc,
unsigned int nfiles,
int *files,
unsigned int flags)
{
VIR_DEBUG("conn=%p, xmlDesc=%s, nfiles=%u, files=%p, flags=%x",
conn, NULLSTR(xmlDesc), nfiles, files, flags);
virResetLastError();
virCheckConnectReturn(conn, NULL);
virCheckNonNullArgGoto(xmlDesc, error);
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainCreateXMLWithFiles) {
virDomainPtr ret;
ret = conn->driver->domainCreateXMLWithFiles(conn, xmlDesc,
nfiles, files,
flags);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return NULL;
}
/**
* virDomainCreateLinux:
* @conn: pointer to the hypervisor connection
* @xmlDesc: string containing an XML description of the domain
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Deprecated after 0.4.6.
* Renamed to virDomainCreateXML() providing identical functionality.
* This existing name will be left indefinitely for API compatibility.
*
* Returns a new domain object or NULL in case of failure
*/
virDomainPtr
virDomainCreateLinux(virConnectPtr conn, const char *xmlDesc,
unsigned int flags)
{
return virDomainCreateXML(conn, xmlDesc, flags);
}
/**
* virDomainLookupByID:
* @conn: pointer to the hypervisor connection
* @id: the domain ID number
*
* Try to find a domain based on the hypervisor ID number
* Note that this won't work for inactive domains which have an ID of -1,
* in that case a lookup based on the Name or UUId need to be done instead.
*
* virDomainFree should be used to free the resources after the
* domain object is no longer needed.
*
* Returns a new domain object or NULL in case of failure. If the
* domain cannot be found, then VIR_ERR_NO_DOMAIN error is raised.
*/
virDomainPtr
virDomainLookupByID(virConnectPtr conn, int id)
{
VIR_DEBUG("conn=%p, id=%d", conn, id);
virResetLastError();
virCheckConnectReturn(conn, NULL);
virCheckNonNegativeArgGoto(id, error);
if (conn->driver->domainLookupByID) {
virDomainPtr ret;
ret = conn->driver->domainLookupByID(conn, id);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return NULL;
}
/**
* virDomainLookupByUUID:
* @conn: pointer to the hypervisor connection
* @uuid: the raw UUID for the domain
*
* Try to lookup a domain on the given hypervisor based on its UUID.
*
* virDomainFree should be used to free the resources after the
* domain object is no longer needed.
*
* Returns a new domain object or NULL in case of failure. If the
* domain cannot be found, then VIR_ERR_NO_DOMAIN error is raised.
*/
virDomainPtr
virDomainLookupByUUID(virConnectPtr conn, const unsigned char *uuid)
{
VIR_UUID_DEBUG(conn, uuid);
virResetLastError();
virCheckConnectReturn(conn, NULL);
virCheckNonNullArgGoto(uuid, error);
if (conn->driver->domainLookupByUUID) {
virDomainPtr ret;
ret = conn->driver->domainLookupByUUID(conn, uuid);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return NULL;
}
/**
* virDomainLookupByUUIDString:
* @conn: pointer to the hypervisor connection
* @uuidstr: the string UUID for the domain
*
* Try to lookup a domain on the given hypervisor based on its UUID.
*
* virDomainFree should be used to free the resources after the
* domain object is no longer needed.
*
* Returns a new domain object or NULL in case of failure. If the
* domain cannot be found, then VIR_ERR_NO_DOMAIN error is raised.
*/
virDomainPtr
virDomainLookupByUUIDString(virConnectPtr conn, const char *uuidstr)
{
unsigned char uuid[VIR_UUID_BUFLEN];
VIR_DEBUG("conn=%p, uuidstr=%s", conn, NULLSTR(uuidstr));
virResetLastError();
virCheckConnectReturn(conn, NULL);
virCheckNonNullArgGoto(uuidstr, error);
if (virUUIDParse(uuidstr, uuid) < 0) {
virReportInvalidArg(uuidstr, "%s", _("Invalid UUID"));
goto error;
}
return virDomainLookupByUUID(conn, &uuid[0]);
error:
virDispatchError(conn);
return NULL;
}
/**
* virDomainLookupByName:
* @conn: pointer to the hypervisor connection
* @name: name for the domain
*
* Try to lookup a domain on the given hypervisor based on its name.
*
* virDomainFree should be used to free the resources after the
* domain object is no longer needed.
*
* Returns a new domain object or NULL in case of failure. If the
* domain cannot be found, then VIR_ERR_NO_DOMAIN error is raised.
*/
virDomainPtr
virDomainLookupByName(virConnectPtr conn, const char *name)
{
VIR_DEBUG("conn=%p, name=%s", conn, NULLSTR(name));
virResetLastError();
virCheckConnectReturn(conn, NULL);
virCheckNonNullArgGoto(name, error);
if (conn->driver->domainLookupByName) {
virDomainPtr dom;
dom = conn->driver->domainLookupByName(conn, name);
if (!dom)
goto error;
return dom;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return NULL;
}
/**
* virDomainDestroy:
* @domain: a domain object
*
* Destroy the domain object. The running instance is shutdown if not down
* already and all resources used by it are given back to the hypervisor. This
* does not free the associated virDomainPtr object.
* This function may require privileged access.
*
* virDomainDestroy first requests that a guest terminate
* (e.g. SIGTERM), then waits for it to comply. After a reasonable
* timeout, if the guest still exists, virDomainDestroy will
* forcefully terminate the guest (e.g. SIGKILL) if necessary (which
* may produce undesirable results, for example unflushed disk cache
* in the guest). To avoid this possibility, it's recommended to
* instead call virDomainDestroyFlags, sending the
* VIR_DOMAIN_DESTROY_GRACEFUL flag.
*
* If the domain is transient and has any snapshot metadata (see
* virDomainSnapshotNum()), then that metadata will automatically
* be deleted when the domain quits.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainDestroy(virDomainPtr domain)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainDestroy) {
int ret;
ret = conn->driver->domainDestroy(domain);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainDestroyFlags:
* @domain: a domain object
* @flags: bitwise-OR of virDomainDestroyFlagsValues
*
* Destroy the domain object. The running instance is shutdown if not down
* already and all resources used by it are given back to the hypervisor.
* This does not free the associated virDomainPtr object.
* This function may require privileged access.
*
* Calling this function with no @flags set (equal to zero) is
* equivalent to calling virDomainDestroy, and after a reasonable
* timeout will forcefully terminate the guest (e.g. SIGKILL) if
* necessary (which may produce undesirable results, for example
* unflushed disk cache in the guest). Including
* VIR_DOMAIN_DESTROY_GRACEFUL in the flags will prevent the forceful
* termination of the guest, and virDomainDestroyFlags will instead
* return an error if the guest doesn't terminate by the end of the
* timeout; at that time, the management application can decide if
* calling again without VIR_DOMAIN_DESTROY_GRACEFUL is appropriate.
*
* Another alternative which may produce cleaner results for the
* guest's disks is to use virDomainShutdown() instead, but that
* depends on guest support (some hypervisor/guest combinations may
* ignore the shutdown request).
*
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainDestroyFlags(virDomainPtr domain,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainDestroyFlags) {
int ret;
ret = conn->driver->domainDestroyFlags(domain, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainFree:
* @domain: a domain object
*
* Free the domain object. The running instance is kept alive.
* The data structure is freed and should not be used thereafter.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainFree(virDomainPtr domain)
{
VIR_DOMAIN_DEBUG(domain);
virResetLastError();
virCheckDomainReturn(domain, -1);
virObjectUnref(domain);
return 0;
}
/**
* virDomainRef:
* @domain: the domain to hold a reference on
*
* Increment the reference count on the domain. For each
* additional call to this method, there shall be a corresponding
* call to virDomainFree to release the reference count, once
* the caller no longer needs the reference to this object.
*
* This method is typically useful for applications where multiple
* threads are using a connection, and it is required that the
* connection remain open until all threads have finished using
* it. ie, each new thread using a domain would increment
* the reference count.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainRef(virDomainPtr domain)
{
VIR_DOMAIN_DEBUG(domain, "refs=%d", domain ? domain->object.u.s.refs : 0);
virResetLastError();
virCheckDomainReturn(domain, -1);
virObjectRef(domain);
return 0;
}
/**
* virDomainSuspend:
* @domain: a domain object
*
* Suspends an active domain, the process is frozen without further access
* to CPU resources and I/O but the memory used by the domain at the
* hypervisor level will stay allocated. Use virDomainResume() to reactivate
* the domain.
* This function may require privileged access.
* Moreover, suspend may not be supported if domain is in some
* special state like VIR_DOMAIN_PMSUSPENDED.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainSuspend(virDomainPtr domain)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainSuspend) {
int ret;
ret = conn->driver->domainSuspend(domain);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainResume:
* @domain: a domain object
*
* Resume a suspended domain, the process is restarted from the state where
* it was frozen by calling virDomainSuspend().
* This function may require privileged access
* Moreover, resume may not be supported if domain is in some
* special state like VIR_DOMAIN_PMSUSPENDED.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainResume(virDomainPtr domain)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainResume) {
int ret;
ret = conn->driver->domainResume(domain);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainPMSuspendForDuration:
* @dom: a domain object
* @target: a value from virNodeSuspendTarget
* @duration: duration in seconds to suspend, or 0 for indefinite
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Attempt to have the guest enter the given @target power management
* suspension level. If @duration is non-zero, also schedule the guest to
* resume normal operation after that many seconds, if nothing else has
* resumed it earlier. Some hypervisors require that @duration be 0, for
* an indefinite suspension.
*
* Dependent on hypervisor used, this may require a
* guest agent to be available, e.g. QEMU.
*
* Beware that at least for QEMU, the domain's process will be terminated
* when VIR_NODE_SUSPEND_TARGET_DISK is used and a new process will be
* launched when libvirt is asked to wake up the domain. As a result of
* this, any runtime changes, such as device hotplug or memory settings,
* are lost unless such changes were made with VIR_DOMAIN_AFFECT_CONFIG
* flag.
*
* Returns: 0 on success,
* -1 on failure.
*/
int
virDomainPMSuspendForDuration(virDomainPtr dom,
unsigned int target,
unsigned long long duration,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "target=%u duration=%llu flags=%x",
target, duration, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
conn = dom->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainPMSuspendForDuration) {
int ret;
ret = conn->driver->domainPMSuspendForDuration(dom, target,
duration, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainPMWakeup:
* @dom: a domain object
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Inject a wakeup into the guest that previously used
* virDomainPMSuspendForDuration, rather than waiting for the
* previously requested duration (if any) to elapse.
*
* Returns: 0 on success,
* -1 on failure.
*/
int
virDomainPMWakeup(virDomainPtr dom,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "flags=%x", flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
conn = dom->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainPMWakeup) {
int ret;
ret = conn->driver->domainPMWakeup(dom, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainSave:
* @domain: a domain object
* @to: path for the output file
*
* This method will suspend a domain and save its memory contents to
* a file on disk. After the call, if successful, the domain is not
* listed as running anymore (this ends the life of a transient domain).
* Use virDomainRestore() to restore a domain after saving.
*
* See virDomainSaveFlags() for more control. Also, a save file can
* be inspected or modified slightly with virDomainSaveImageGetXMLDesc()
* and virDomainSaveImageDefineXML().
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainSave(virDomainPtr domain, const char *to)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "to=%s", to);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(to, error);
if (conn->driver->domainSave) {
int ret;
char *absolute_to;
/* We must absolutize the file path as the save is done out of process */
if (virFileAbsPath(to, &absolute_to) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("could not build absolute output file path"));
goto error;
}
ret = conn->driver->domainSave(domain, absolute_to);
VIR_FREE(absolute_to);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSaveFlags:
* @domain: a domain object
* @to: path for the output file
* @dxml: (optional) XML config for adjusting guest xml used on restore
* @flags: bitwise-OR of virDomainSaveRestoreFlags
*
* This method will suspend a domain and save its memory contents to
* a file on disk. After the call, if successful, the domain is not
* listed as running anymore (this ends the life of a transient domain).
* Use virDomainRestore() to restore a domain after saving.
*
* If the hypervisor supports it, @dxml can be used to alter
* host-specific portions of the domain XML that will be used when
* restoring an image. For example, it is possible to alter the
* backing filename that is associated with a disk device, in order to
* prepare for file renaming done as part of backing up the disk
* device while the domain is stopped.
*
* If @flags includes VIR_DOMAIN_SAVE_BYPASS_CACHE, then libvirt will
* attempt to bypass the file system cache while creating the file, or
* fail if it cannot do so for the given system; this can allow less
* pressure on file system cache, but also risks slowing saves to NFS.
*
* Normally, the saved state file will remember whether the domain was
* running or paused, and restore defaults to the same state.
* Specifying VIR_DOMAIN_SAVE_RUNNING or VIR_DOMAIN_SAVE_PAUSED in
* @flags will override what state gets saved into the file. These
* two flags are mutually exclusive.
*
* A save file can be inspected or modified slightly with
* virDomainSaveImageGetXMLDesc() and virDomainSaveImageDefineXML().
*
* Some hypervisors may prevent this operation if there is a current
* block copy operation; in that case, use virDomainBlockJobAbort()
* to stop the block copy first.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainSaveFlags(virDomainPtr domain, const char *to,
const char *dxml, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "to=%s, dxml=%s, flags=%x",
to, NULLSTR(dxml), flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(to, error);
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_SAVE_RUNNING,
VIR_DOMAIN_SAVE_PAUSED,
error);
if (conn->driver->domainSaveFlags) {
int ret;
char *absolute_to;
/* We must absolutize the file path as the save is done out of process */
if (virFileAbsPath(to, &absolute_to) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("could not build absolute output file path"));
goto error;
}
ret = conn->driver->domainSaveFlags(domain, absolute_to, dxml, flags);
VIR_FREE(absolute_to);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainRestore:
* @conn: pointer to the hypervisor connection
* @from: path to the input file
*
* This method will restore a domain saved to disk by virDomainSave().
*
* See virDomainRestoreFlags() for more control.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainRestore(virConnectPtr conn, const char *from)
{
VIR_DEBUG("conn=%p, from=%s", conn, NULLSTR(from));
virResetLastError();
virCheckConnectReturn(conn, -1);
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(from, error);
if (conn->driver->domainRestore) {
int ret;
char *absolute_from;
/* We must absolutize the file path as the restore is done out of process */
if (virFileAbsPath(from, &absolute_from) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("could not build absolute input file path"));
goto error;
}
ret = conn->driver->domainRestore(conn, absolute_from);
VIR_FREE(absolute_from);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainRestoreFlags:
* @conn: pointer to the hypervisor connection
* @from: path to the input file
* @dxml: (optional) XML config for adjusting guest xml used on restore
* @flags: bitwise-OR of virDomainSaveRestoreFlags
*
* This method will restore a domain saved to disk by virDomainSave().
*
* If the hypervisor supports it, @dxml can be used to alter
* host-specific portions of the domain XML that will be used when
* restoring an image. For example, it is possible to alter the
* backing filename that is associated with a disk device, in order to
* prepare for file renaming done as part of backing up the disk
* device while the domain is stopped.
*
* If @flags includes VIR_DOMAIN_SAVE_BYPASS_CACHE, then libvirt will
* attempt to bypass the file system cache while restoring the file, or
* fail if it cannot do so for the given system; this can allow less
* pressure on file system cache, but also risks slowing restores from NFS.
*
* Normally, the saved state file will remember whether the domain was
* running or paused, and restore defaults to the same state.
* Specifying VIR_DOMAIN_SAVE_RUNNING or VIR_DOMAIN_SAVE_PAUSED in
* @flags will override the default read from the file. These two
* flags are mutually exclusive.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainRestoreFlags(virConnectPtr conn, const char *from, const char *dxml,
unsigned int flags)
{
VIR_DEBUG("conn=%p, from=%s, dxml=%s, flags=%x",
conn, NULLSTR(from), NULLSTR(dxml), flags);
virResetLastError();
virCheckConnectReturn(conn, -1);
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(from, error);
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_SAVE_RUNNING,
VIR_DOMAIN_SAVE_PAUSED,
error);
if (conn->driver->domainRestoreFlags) {
int ret;
char *absolute_from;
/* We must absolutize the file path as the restore is done out of process */
if (virFileAbsPath(from, &absolute_from) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("could not build absolute input file path"));
goto error;
}
ret = conn->driver->domainRestoreFlags(conn, absolute_from, dxml,
flags);
VIR_FREE(absolute_from);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainSaveImageGetXMLDesc:
* @conn: pointer to the hypervisor connection
* @file: path to saved state file
* @flags: bitwise-OR of subset of virDomainXMLFlags
*
* This method will extract the XML describing the domain at the time
* a saved state file was created. @file must be a file created
* previously by virDomainSave() or virDomainSaveFlags().
*
* No security-sensitive data will be included unless @flags contains
* VIR_DOMAIN_XML_SECURE; this flag is rejected on read-only
* connections. For this API, @flags should not contain either
* VIR_DOMAIN_XML_INACTIVE or VIR_DOMAIN_XML_UPDATE_CPU.
*
* Returns a 0 terminated UTF-8 encoded XML instance, or NULL in case of
* error. The caller must free() the returned value.
*/
char *
virDomainSaveImageGetXMLDesc(virConnectPtr conn, const char *file,
unsigned int flags)
{
VIR_DEBUG("conn=%p, file=%s, flags=%x",
conn, NULLSTR(file), flags);
virResetLastError();
virCheckConnectReturn(conn, NULL);
virCheckNonNullArgGoto(file, error);
if ((conn->flags & VIR_CONNECT_RO) && (flags & VIR_DOMAIN_XML_SECURE)) {
virReportError(VIR_ERR_OPERATION_DENIED, "%s",
_("virDomainSaveImageGetXMLDesc with secure flag"));
goto error;
}
if (conn->driver->domainSaveImageGetXMLDesc) {
char *ret;
char *absolute_file;
/* We must absolutize the file path as the read is done out of process */
if (virFileAbsPath(file, &absolute_file) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("could not build absolute input file path"));
goto error;
}
ret = conn->driver->domainSaveImageGetXMLDesc(conn, absolute_file,
flags);
VIR_FREE(absolute_file);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return NULL;
}
/**
* virDomainSaveImageDefineXML:
* @conn: pointer to the hypervisor connection
* @file: path to saved state file
* @dxml: XML config for adjusting guest xml used on restore
* @flags: bitwise-OR of virDomainSaveRestoreFlags
*
* This updates the definition of a domain stored in a saved state
* file. @file must be a file created previously by virDomainSave()
* or virDomainSaveFlags().
*
* @dxml can be used to alter host-specific portions of the domain XML
* that will be used when restoring an image. For example, it is
* possible to alter the backing filename that is associated with a
* disk device, to match renaming done as part of backing up the disk
* device while the domain is stopped.
*
* Normally, the saved state file will remember whether the domain was
* running or paused, and restore defaults to the same state.
* Specifying VIR_DOMAIN_SAVE_RUNNING or VIR_DOMAIN_SAVE_PAUSED in
* @flags will override the default saved into the file; omitting both
* leaves the file's default unchanged. These two flags are mutually
* exclusive.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainSaveImageDefineXML(virConnectPtr conn, const char *file,
const char *dxml, unsigned int flags)
{
VIR_DEBUG("conn=%p, file=%s, dxml=%s, flags=%x",
conn, NULLSTR(file), NULLSTR(dxml), flags);
virResetLastError();
virCheckConnectReturn(conn, -1);
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(file, error);
virCheckNonNullArgGoto(dxml, error);
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_SAVE_RUNNING,
VIR_DOMAIN_SAVE_PAUSED,
error);
if (conn->driver->domainSaveImageDefineXML) {
int ret;
char *absolute_file;
/* We must absolutize the file path as the read is done out of process */
if (virFileAbsPath(file, &absolute_file) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("could not build absolute input file path"));
goto error;
}
ret = conn->driver->domainSaveImageDefineXML(conn, absolute_file,
dxml, flags);
VIR_FREE(absolute_file);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainCoreDump:
* @domain: a domain object
* @to: path for the core file
* @flags: bitwise-OR of virDomainCoreDumpFlags
*
* This method will dump the core of a domain on a given file for analysis.
* Note that for remote Xen Daemon the file path will be interpreted in
* the remote host. Hypervisors may require the user to manually ensure
* proper permissions on the file named by @to.
*
* If @flags includes VIR_DUMP_CRASH, then leave the guest shut off with
* a crashed state after the dump completes. If @flags includes
* VIR_DUMP_LIVE, then make the core dump while continuing to allow
* the guest to run; otherwise, the guest is suspended during the dump.
* VIR_DUMP_RESET flag forces reset of the guest after dump.
* The above three flags are mutually exclusive.
*
* Additionally, if @flags includes VIR_DUMP_BYPASS_CACHE, then libvirt
* will attempt to bypass the file system cache while creating the file,
* or fail if it cannot do so for the given system; this can allow less
* pressure on file system cache, but also risks slowing saves to NFS.
*
* For more control over the output format, see virDomainCoreDumpWithFormat().
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainCoreDump(virDomainPtr domain, const char *to, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "to=%s, flags=%x", to, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(to, error);
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DUMP_CRASH, VIR_DUMP_LIVE, error);
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DUMP_CRASH, VIR_DUMP_RESET, error);
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DUMP_LIVE, VIR_DUMP_RESET, error);
if (conn->driver->domainCoreDump) {
int ret;
char *absolute_to;
/* We must absolutize the file path as the save is done out of process */
if (virFileAbsPath(to, &absolute_to) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("could not build absolute core file path"));
goto error;
}
ret = conn->driver->domainCoreDump(domain, absolute_to, flags);
VIR_FREE(absolute_to);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainCoreDumpWithFormat:
* @domain: a domain object
* @to: path for the core file
* @dumpformat: format of domain memory's dump (one of virDomainCoreDumpFormat enum)
* @flags: bitwise-OR of virDomainCoreDumpFlags
*
* This method will dump the core of a domain on a given file for analysis.
* Note that for remote Xen Daemon the file path will be interpreted in
* the remote host. Hypervisors may require the user to manually ensure
* proper permissions on the file named by @to.
*
* @dumpformat controls which format the dump will have; use of
* VIR_DOMAIN_CORE_DUMP_FORMAT_RAW mirrors what virDomainCoreDump() will
* perform. Not all hypervisors are able to support all formats.
*
* If @flags includes VIR_DUMP_CRASH, then leave the guest shut off with
* a crashed state after the dump completes. If @flags includes
* VIR_DUMP_LIVE, then make the core dump while continuing to allow
* the guest to run; otherwise, the guest is suspended during the dump.
* VIR_DUMP_RESET flag forces reset of the guest after dump.
* The above three flags are mutually exclusive.
*
* Additionally, if @flags includes VIR_DUMP_BYPASS_CACHE, then libvirt
* will attempt to bypass the file system cache while creating the file,
* or fail if it cannot do so for the given system; this can allow less
* pressure on file system cache, but also risks slowing saves to NFS.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainCoreDumpWithFormat(virDomainPtr domain, const char *to,
unsigned int dumpformat, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "to=%s, dumpformat=%u, flags=%x",
to, dumpformat, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(to, error);
if (dumpformat >= VIR_DOMAIN_CORE_DUMP_FORMAT_LAST) {
virReportInvalidArg(flags, _("dumpformat '%d' is not supported"),
dumpformat);
goto error;
}
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DUMP_CRASH, VIR_DUMP_LIVE, error);
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DUMP_CRASH, VIR_DUMP_RESET, error);
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DUMP_LIVE, VIR_DUMP_RESET, error);
if (conn->driver->domainCoreDumpWithFormat) {
int ret;
char *absolute_to;
/* We must absolutize the file path as the save is done out of process */
if (virFileAbsPath(to, &absolute_to) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("could not build absolute core file path"));
goto error;
}
ret = conn->driver->domainCoreDumpWithFormat(domain, absolute_to,
dumpformat, flags);
VIR_FREE(absolute_to);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainScreenshot:
* @domain: a domain object
* @stream: stream to use as output
* @screen: monitor ID to take screenshot from
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Take a screenshot of current domain console as a stream. The image format
* is hypervisor specific. Moreover, some hypervisors supports multiple
* displays per domain. These can be distinguished by @screen argument.
*
* This call sets up a stream; subsequent use of stream API is necessary
* to transfer actual data, determine how much data is successfully
* transferred, and detect any errors.
*
* The screen ID is the sequential number of screen. In case of multiple
* graphics cards, heads are enumerated before devices, e.g. having
* two graphics cards, both with four heads, screen ID 5 addresses
* the second head on the second card.
*
* Returns a string representing the mime-type of the image format, or
* NULL upon error. The caller must free() the returned value.
*/
char *
virDomainScreenshot(virDomainPtr domain,
virStreamPtr stream,
unsigned int screen,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(domain, "stream=%p, flags=%x", stream, flags);
virResetLastError();
virCheckDomainReturn(domain, NULL);
virCheckStreamGoto(stream, error);
virCheckReadOnlyGoto(domain->conn->flags, error);
if (domain->conn != stream->conn) {
virReportInvalidArg(stream,
_("stream must match connection of domain '%s'"),
domain->name);
goto error;
}
if (domain->conn->driver->domainScreenshot) {
char *ret;
ret = domain->conn->driver->domainScreenshot(domain, stream,
screen, flags);
if (ret == NULL)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return NULL;
}
/**
* virDomainShutdown:
* @domain: a domain object
*
* Shutdown a domain, the domain object is still usable thereafter, but
* the domain OS is being stopped. Note that the guest OS may ignore the
* request. Additionally, the hypervisor may check and support the domain
* 'on_poweroff' XML setting resulting in a domain that reboots instead of
* shutting down. For guests that react to a shutdown request, the differences
* from virDomainDestroy() are that the guests disk storage will be in a
* stable state rather than having the (virtual) power cord pulled, and
* this command returns as soon as the shutdown request is issued rather
* than blocking until the guest is no longer running.
*
* If the domain is transient and has any snapshot metadata (see
* virDomainSnapshotNum()), then that metadata will automatically
* be deleted when the domain quits.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainShutdown(virDomainPtr domain)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainShutdown) {
int ret;
ret = conn->driver->domainShutdown(domain);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainShutdownFlags:
* @domain: a domain object
* @flags: bitwise-OR of virDomainShutdownFlagValues
*
* Shutdown a domain, the domain object is still usable thereafter but
* the domain OS is being stopped. Note that the guest OS may ignore the
* request. Additionally, the hypervisor may check and support the domain
* 'on_poweroff' XML setting resulting in a domain that reboots instead of
* shutting down. For guests that react to a shutdown request, the differences
* from virDomainDestroy() are that the guest's disk storage will be in a
* stable state rather than having the (virtual) power cord pulled, and
* this command returns as soon as the shutdown request is issued rather
* than blocking until the guest is no longer running.
*
* If the domain is transient and has any snapshot metadata (see
* virDomainSnapshotNum()), then that metadata will automatically
* be deleted when the domain quits.
*
* If @flags is set to zero, then the hypervisor will choose the
* method of shutdown it considers best. To have greater control
* pass one or more of the virDomainShutdownFlagValues. The order
* in which the hypervisor tries each shutdown method is undefined,
* and a hypervisor is not required to support all methods.
*
* To use guest agent (VIR_DOMAIN_SHUTDOWN_GUEST_AGENT) the domain XML
* must have <channel> configured.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainShutdownFlags(virDomainPtr domain, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainShutdownFlags) {
int ret;
ret = conn->driver->domainShutdownFlags(domain, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainReboot:
* @domain: a domain object
* @flags: bitwise-OR of virDomainRebootFlagValues
*
* Reboot a domain, the domain object is still usable thereafter, but
* the domain OS is being stopped for a restart.
* Note that the guest OS may ignore the request.
* Additionally, the hypervisor may check and support the domain
* 'on_reboot' XML setting resulting in a domain that shuts down instead
* of rebooting.
*
* If @flags is set to zero, then the hypervisor will choose the
* method of shutdown it considers best. To have greater control
* pass one or more of the virDomainRebootFlagValues. The order
* in which the hypervisor tries each shutdown method is undefined,
* and a hypervisor is not required to support all methods.
*
* To use guest agent (VIR_DOMAIN_REBOOT_GUEST_AGENT) the domain XML
* must have <channel> configured.
*
* Due to implementation limitations in some drivers (the qemu driver,
* for instance) it is not advised to migrate or save a guest that is
* rebooting as a result of this API. Migrating such a guest can lead
* to a plain shutdown on the destination.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainReboot(virDomainPtr domain, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainReboot) {
int ret;
ret = conn->driver->domainReboot(domain, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainReset:
* @domain: a domain object
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Reset a domain immediately without any guest OS shutdown.
* Reset emulates the power reset button on a machine, where all
* hardware sees the RST line set and reinitializes internal state.
*
* Note that there is a risk of data loss caused by reset without any
* guest OS shutdown.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainReset(virDomainPtr domain, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainReset) {
int ret;
ret = conn->driver->domainReset(domain, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetName:
* @domain: a domain object
*
* Get the public name for that domain
*
* Returns a pointer to the name or NULL, the string need not be deallocated
* its lifetime will be the same as the domain object.
*/
const char *
virDomainGetName(virDomainPtr domain)
{
VIR_DEBUG("domain=%p", domain);
virResetLastError();
virCheckDomainReturn(domain, NULL);
return domain->name;
}
/**
* virDomainGetUUID:
* @domain: a domain object
* @uuid: pointer to a VIR_UUID_BUFLEN bytes array
*
* Get the UUID for a domain
*
* Returns -1 in case of error, 0 in case of success
*/
int
virDomainGetUUID(virDomainPtr domain, unsigned char *uuid)
{
VIR_DOMAIN_DEBUG(domain, "uuid=%p", uuid);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(uuid, error);
memcpy(uuid, &domain->uuid[0], VIR_UUID_BUFLEN);
return 0;
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetUUIDString:
* @domain: a domain object
* @buf: pointer to a VIR_UUID_STRING_BUFLEN bytes array
*
* Get the UUID for a domain as string. For more information about
* UUID see RFC4122.
*
* Returns -1 in case of error, 0 in case of success
*/
int
virDomainGetUUIDString(virDomainPtr domain, char *buf)
{
VIR_DOMAIN_DEBUG(domain, "buf=%p", buf);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(buf, error);
virUUIDFormat(domain->uuid, buf);
return 0;
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetID:
* @domain: a domain object
*
* Get the hypervisor ID number for the domain
*
* Returns the domain ID number or (unsigned int) -1 in case of error
*/
unsigned int
virDomainGetID(virDomainPtr domain)
{
VIR_DOMAIN_DEBUG(domain);
virResetLastError();
virCheckDomainReturn(domain, (unsigned int)-1);
return domain->id;
}
/**
* virDomainGetOSType:
* @domain: a domain object
*
* Get the type of domain operation system.
*
* Returns the new string or NULL in case of error, the string must be
* freed by the caller.
*/
char *
virDomainGetOSType(virDomainPtr domain)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain);
virResetLastError();
virCheckDomainReturn(domain, NULL);
conn = domain->conn;
if (conn->driver->domainGetOSType) {
char *ret;
ret = conn->driver->domainGetOSType(domain);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return NULL;
}
/**
* virDomainGetMaxMemory:
* @domain: a domain object or NULL
*
* Retrieve the maximum amount of physical memory allocated to a
* domain. If domain is NULL, then this get the amount of memory reserved
* to Domain0 i.e. the domain where the application runs.
*
* Returns the memory size in kibibytes (blocks of 1024 bytes), or 0 in
* case of error.
*/
unsigned long
virDomainGetMaxMemory(virDomainPtr domain)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain);
virResetLastError();
virCheckDomainReturn(domain, 0);
conn = domain->conn;
if (conn->driver->domainGetMaxMemory) {
unsigned long long ret;
ret = conn->driver->domainGetMaxMemory(domain);
if (ret == 0)
goto error;
if ((unsigned long) ret != ret) {
virReportError(VIR_ERR_OVERFLOW, _("result too large: %llu"),
ret);
goto error;
}
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return 0;
}
/**
* virDomainSetMaxMemory:
* @domain: a domain object or NULL
* @memory: the memory size in kibibytes (blocks of 1024 bytes)
*
* Dynamically change the maximum amount of physical memory allocated to a
* domain. If domain is NULL, then this change the amount of memory reserved
* to Domain0 i.e. the domain where the application runs.
* This function may require privileged access to the hypervisor.
*
* This command is hypervisor-specific for whether active, persistent,
* or both configurations are changed; for more control, use
* virDomainSetMemoryFlags().
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainSetMaxMemory(virDomainPtr domain, unsigned long memory)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "memory=%lu", memory);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonZeroArgGoto(memory, error);
if (virMemoryMaxValue(true) / 1024 <= memory) {
virReportError(VIR_ERR_OVERFLOW, _("input too large: %lu"),
memory);
goto error;
}
if (conn->driver->domainSetMaxMemory) {
int ret;
ret = conn->driver->domainSetMaxMemory(domain, memory);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSetMemory:
* @domain: a domain object or NULL
* @memory: the memory size in kibibytes (blocks of 1024 bytes)
*
* Dynamically change the target amount of physical memory allocated to a
* domain. If domain is NULL, then this change the amount of memory reserved
* to Domain0 i.e. the domain where the application runs.
* This function may require privileged access to the hypervisor.
*
* This command is hypervisor-specific for whether active, persistent,
* or both configurations are changed; for more control, use
* virDomainSetMemoryFlags().
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainSetMemory(virDomainPtr domain, unsigned long memory)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "memory=%lu", memory);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonZeroArgGoto(memory, error);
if (virMemoryMaxValue(true) / 1024 <= memory) {
virReportError(VIR_ERR_OVERFLOW, _("input too large: %lu"),
memory);
goto error;
}
if (conn->driver->domainSetMemory) {
int ret;
ret = conn->driver->domainSetMemory(domain, memory);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSetMemoryFlags:
* @domain: a domain object or NULL
* @memory: the memory size in kibibytes (blocks of 1024 bytes)
* @flags: bitwise-OR of virDomainMemoryModFlags
*
* Dynamically change the target amount of physical memory allocated to a
* domain. If domain is NULL, then this change the amount of memory reserved
* to Domain0 i.e. the domain where the application runs.
* This function may require privileged access to the hypervisor.
*
* @flags may include VIR_DOMAIN_AFFECT_LIVE or VIR_DOMAIN_AFFECT_CONFIG.
* Both flags may be set. If VIR_DOMAIN_AFFECT_LIVE is set, the change affects
* a running domain and will fail if domain is not active.
* If VIR_DOMAIN_AFFECT_CONFIG is set, the change affects persistent state,
* and will fail for transient domains. If neither flag is specified
* (that is, @flags is VIR_DOMAIN_AFFECT_CURRENT), then an inactive domain
* modifies persistent setup, while an active domain is hypervisor-dependent
* on whether just live or both live and persistent state is changed.
* If VIR_DOMAIN_MEM_MAXIMUM is set, the change affects domain's maximum memory
* size rather than current memory size.
* Not all hypervisors can support all flag combinations.
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virDomainSetMemoryFlags(virDomainPtr domain, unsigned long memory,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "memory=%lu, flags=%x", memory, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonZeroArgGoto(memory, error);
if (virMemoryMaxValue(true) / 1024 <= memory) {
virReportError(VIR_ERR_OVERFLOW, _("input too large: %lu"),
memory);
goto error;
}
if (conn->driver->domainSetMemoryFlags) {
int ret;
ret = conn->driver->domainSetMemoryFlags(domain, memory, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSetMemoryStatsPeriod:
* @domain: a domain object or NULL
* @period: the period in seconds for stats collection
* @flags: bitwise-OR of virDomainMemoryModFlags
*
* Dynamically change the domain memory balloon driver statistics collection
* period. Use 0 to disable and a positive value to enable.
*
* @flags may include VIR_DOMAIN_AFFECT_LIVE or VIR_DOMAIN_AFFECT_CONFIG.
* Both flags may be set. If VIR_DOMAIN_AFFECT_LIVE is set, the change affects
* a running domain and will fail if domain is not active.
* If VIR_DOMAIN_AFFECT_CONFIG is set, the change affects persistent state,
* and will fail for transient domains. If neither flag is specified
* (that is, @flags is VIR_DOMAIN_AFFECT_CURRENT), then an inactive domain
* modifies persistent setup, while an active domain is hypervisor-dependent
* on whether just live or both live and persistent state is changed.
*
* Not all hypervisors can support all flag combinations.
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virDomainSetMemoryStatsPeriod(virDomainPtr domain, int period,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "period=%d, flags=%x", period, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
/* This must be positive to set the balloon collection period */
virCheckNonNegativeArgGoto(period, error);
if (conn->driver->domainSetMemoryStatsPeriod) {
int ret;
ret = conn->driver->domainSetMemoryStatsPeriod(domain, period, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSetMemoryParameters:
* @domain: pointer to domain object
* @params: pointer to memory parameter objects
* @nparams: number of memory parameter (this value can be the same or
* less than the number of parameters supported)
* @flags: bitwise-OR of virDomainModificationImpact
*
* Change all or a subset of the memory tunables.
* This function may require privileged access to the hypervisor.
*
* Possible values for all *_limit memory tunables are in range from 0 to
* VIR_DOMAIN_MEMORY_PARAM_UNLIMITED.
*
* Returns -1 in case of error, 0 in case of success.
*/
int
virDomainSetMemoryParameters(virDomainPtr domain,
virTypedParameterPtr params,
int nparams, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, flags=%x",
params, nparams, flags);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(params, error);
virCheckPositiveArgGoto(nparams, error);
if (virTypedParameterValidateSet(conn, params, nparams) < 0)
goto error;
if (conn->driver->domainSetMemoryParameters) {
int ret;
ret = conn->driver->domainSetMemoryParameters(domain, params, nparams, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetMemoryParameters:
* @domain: pointer to domain object
* @params: pointer to memory parameter object
* (return value, allocated by the caller)
* @nparams: pointer to number of memory parameters; input and output
* @flags: bitwise-OR of virDomainModificationImpact and virTypedParameterFlags
*
* Get all memory parameters. On input, @nparams gives the size of the
* @params array; on output, @nparams gives how many slots were filled
* with parameter information, which might be less but will not exceed
* the input value.
*
* As a special case, calling with @params as NULL and @nparams as 0 on
* input will cause @nparams on output to contain the number of parameters
* supported by the hypervisor. The caller should then allocate @params
* array, i.e. (sizeof(@virTypedParameter) * @nparams) bytes and call the API
* again.
*
* Here is a sample code snippet:
*
* if (virDomainGetMemoryParameters(dom, NULL, &nparams, 0) == 0 &&
* nparams != 0) {
* if ((params = malloc(sizeof(*params) * nparams)) == NULL)
* goto error;
* memset(params, 0, sizeof(*params) * nparams);
* if (virDomainGetMemoryParameters(dom, params, &nparams, 0))
* goto error;
* }
*
* This function may require privileged access to the hypervisor. This function
* expects the caller to allocate the @params.
*
* Returns -1 in case of error, 0 in case of success.
*/
int
virDomainGetMemoryParameters(virDomainPtr domain,
virTypedParameterPtr params,
int *nparams, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, flags=%x",
params, (nparams) ? *nparams : -1, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(nparams, error);
virCheckNonNegativeArgGoto(*nparams, error);
if (*nparams != 0)
virCheckNonNullArgGoto(params, error);
if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_TYPED_PARAM_STRING))
flags |= VIR_TYPED_PARAM_STRING_OKAY;
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
VIR_DOMAIN_AFFECT_CONFIG,
error);
conn = domain->conn;
if (conn->driver->domainGetMemoryParameters) {
int ret;
ret = conn->driver->domainGetMemoryParameters(domain, params, nparams, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSetNumaParameters:
* @domain: pointer to domain object
* @params: pointer to numa parameter objects
* @nparams: number of numa parameters (this value can be the same or
* less than the number of parameters supported)
* @flags: bitwise-OR of virDomainModificationImpact
*
* Change all or a subset of the numa tunables.
* This function may require privileged access to the hypervisor.
*
* Returns -1 in case of error, 0 in case of success.
*/
int
virDomainSetNumaParameters(virDomainPtr domain,
virTypedParameterPtr params,
int nparams, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, flags=%x",
params, nparams, flags);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckReadOnlyGoto(domain->conn->flags, error);
virCheckNonNullArgGoto(params, error);
virCheckPositiveArgGoto(nparams, error);
if (virTypedParameterValidateSet(domain->conn, params, nparams) < 0)
goto error;
conn = domain->conn;
if (conn->driver->domainSetNumaParameters) {
int ret;
ret = conn->driver->domainSetNumaParameters(domain, params, nparams,
flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetNumaParameters:
* @domain: pointer to domain object
* @params: pointer to numa parameter object
* (return value, allocated by the caller)
* @nparams: pointer to number of numa parameters
* @flags: bitwise-OR of virDomainModificationImpact and virTypedParameterFlags
*
* Get all numa parameters. On input, @nparams gives the size of the
* @params array; on output, @nparams gives how many slots were filled
* with parameter information, which might be less but will not exceed
* the input value.
*
* As a special case, calling with @params as NULL and @nparams as 0 on
* input will cause @nparams on output to contain the number of parameters
* supported by the hypervisor. The caller should then allocate @params
* array, i.e. (sizeof(@virTypedParameter) * @nparams) bytes and call the API
* again.
*
* See virDomainGetMemoryParameters() for an equivalent usage example.
*
* This function may require privileged access to the hypervisor. This function
* expects the caller to allocate the @params.
*
* Returns -1 in case of error, 0 in case of success.
*/
int
virDomainGetNumaParameters(virDomainPtr domain,
virTypedParameterPtr params,
int *nparams, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, flags=%x",
params, (nparams) ? *nparams : -1, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(nparams, error);
virCheckNonNegativeArgGoto(*nparams, error);
if (*nparams != 0)
virCheckNonNullArgGoto(params, error);
if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_TYPED_PARAM_STRING))
flags |= VIR_TYPED_PARAM_STRING_OKAY;
conn = domain->conn;
if (conn->driver->domainGetNumaParameters) {
int ret;
ret = conn->driver->domainGetNumaParameters(domain, params, nparams,
flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSetBlkioParameters:
* @domain: pointer to domain object
* @params: pointer to blkio parameter objects
* @nparams: number of blkio parameters (this value can be the same or
* less than the number of parameters supported)
* @flags: bitwise-OR of virDomainModificationImpact
*
* Change all or a subset of the blkio tunables.
* This function may require privileged access to the hypervisor.
*
* Returns -1 in case of error, 0 in case of success.
*/
int
virDomainSetBlkioParameters(virDomainPtr domain,
virTypedParameterPtr params,
int nparams, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, flags=%x",
params, nparams, flags);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(params, error);
virCheckNonNegativeArgGoto(nparams, error);
if (virTypedParameterValidateSet(conn, params, nparams) < 0)
goto error;
if (conn->driver->domainSetBlkioParameters) {
int ret;
ret = conn->driver->domainSetBlkioParameters(domain, params, nparams, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetBlkioParameters:
* @domain: pointer to domain object
* @params: pointer to blkio parameter object
* (return value, allocated by the caller)
* @nparams: pointer to number of blkio parameters; input and output
* @flags: bitwise-OR of virDomainModificationImpact and virTypedParameterFlags
*
* Get all blkio parameters. On input, @nparams gives the size of the
* @params array; on output, @nparams gives how many slots were filled
* with parameter information, which might be less but will not exceed
* the input value.
*
* As a special case, calling with @params as NULL and @nparams as 0 on
* input will cause @nparams on output to contain the number of parameters
* supported by the hypervisor. The caller should then allocate @params
* array, i.e. (sizeof(@virTypedParameter) * @nparams) bytes and call the API
* again.
*
* See virDomainGetMemoryParameters() for an equivalent usage example.
*
* This function may require privileged access to the hypervisor. This function
* expects the caller to allocate the @params.
*
* Returns -1 in case of error, 0 in case of success.
*/
int
virDomainGetBlkioParameters(virDomainPtr domain,
virTypedParameterPtr params,
int *nparams, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, flags=%x",
params, (nparams) ? *nparams : -1, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(nparams, error);
virCheckNonNegativeArgGoto(*nparams, error);
if (*nparams != 0)
virCheckNonNullArgGoto(params, error);
if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_TYPED_PARAM_STRING))
flags |= VIR_TYPED_PARAM_STRING_OKAY;
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
VIR_DOMAIN_AFFECT_CONFIG,
error);
conn = domain->conn;
if (conn->driver->domainGetBlkioParameters) {
int ret;
ret = conn->driver->domainGetBlkioParameters(domain, params, nparams, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetInfo:
* @domain: a domain object
* @info: pointer to a virDomainInfo structure allocated by the user
*
* Extract information about a domain. Note that if the connection
* used to get the domain is limited only a partial set of the information
* can be extracted.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainGetInfo(virDomainPtr domain, virDomainInfoPtr info)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "info=%p", info);
virResetLastError();
if (info)
memset(info, 0, sizeof(*info));
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(info, error);
conn = domain->conn;
if (conn->driver->domainGetInfo) {
int ret;
ret = conn->driver->domainGetInfo(domain, info);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetState:
* @domain: a domain object
* @state: returned state of the domain (one of virDomainState)
* @reason: returned reason which led to @state (one of virDomain*Reason
* corresponding to the current state); it is allowed to be NULL
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Extract domain state. Each state can be accompanied with a reason (if known)
* which led to the state.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainGetState(virDomainPtr domain,
int *state,
int *reason,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "state=%p, reason=%p, flags=%x",
state, reason, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(state, error);
conn = domain->conn;
if (conn->driver->domainGetState) {
int ret;
ret = conn->driver->domainGetState(domain, state, reason, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetControlInfo:
* @domain: a domain object
* @info: pointer to a virDomainControlInfo structure allocated by the user
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Extract details about current state of control interface to a domain.
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainGetControlInfo(virDomainPtr domain,
virDomainControlInfoPtr info,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "info=%p, flags=%x", info, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(info, error);
conn = domain->conn;
if (conn->driver->domainGetControlInfo) {
int ret;
ret = conn->driver->domainGetControlInfo(domain, info, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetXMLDesc:
* @domain: a domain object
* @flags: bitwise-OR of virDomainXMLFlags
*
* Provide an XML description of the domain. The description may be reused
* later to relaunch the domain with virDomainCreateXML().
*
* No security-sensitive data will be included unless @flags contains
* VIR_DOMAIN_XML_SECURE; this flag is rejected on read-only
* connections. If @flags includes VIR_DOMAIN_XML_INACTIVE, then the
* XML represents the configuration that will be used on the next boot
* of a persistent domain; otherwise, the configuration represents the
* currently running domain. If @flags contains
* VIR_DOMAIN_XML_UPDATE_CPU, then the portion of the domain XML
* describing CPU capabilities is modified to match actual
* capabilities of the host.
*
* Returns a 0 terminated UTF-8 encoded XML instance, or NULL in case of error.
* the caller must free() the returned value.
*/
char *
virDomainGetXMLDesc(virDomainPtr domain, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);
virResetLastError();
virCheckDomainReturn(domain, NULL);
conn = domain->conn;
if ((conn->flags & VIR_CONNECT_RO) &&
(flags & (VIR_DOMAIN_XML_SECURE | VIR_DOMAIN_XML_MIGRATABLE))) {
virReportError(VIR_ERR_OPERATION_DENIED, "%s",
_("virDomainGetXMLDesc with secure flag"));
goto error;
}
if (conn->driver->domainGetXMLDesc) {
char *ret;
ret = conn->driver->domainGetXMLDesc(domain, flags);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return NULL;
}
/**
* virConnectDomainXMLFromNative:
* @conn: a connection object
* @nativeFormat: configuration format importing from
* @nativeConfig: the configuration data to import
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Reads native configuration data describing a domain, and
* generates libvirt domain XML. The format of the native
* data is hypervisor dependent.
*
* Returns a 0 terminated UTF-8 encoded XML instance, or NULL in case of error.
* the caller must free() the returned value.
*/
char *
virConnectDomainXMLFromNative(virConnectPtr conn,
const char *nativeFormat,
const char *nativeConfig,
unsigned int flags)
{
VIR_DEBUG("conn=%p, format=%s, config=%s, flags=%x",
conn, NULLSTR(nativeFormat), NULLSTR(nativeConfig), flags);
virResetLastError();
virCheckConnectReturn(conn, NULL);
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(nativeFormat, error);
virCheckNonNullArgGoto(nativeConfig, error);
if (conn->driver->connectDomainXMLFromNative) {
char *ret;
ret = conn->driver->connectDomainXMLFromNative(conn,
nativeFormat,
nativeConfig,
flags);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return NULL;
}
/**
* virConnectDomainXMLToNative:
* @conn: a connection object
* @nativeFormat: configuration format exporting to
* @domainXml: the domain configuration to export
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Reads a domain XML configuration document, and generates
* a native configuration file describing the domain.
* The format of the native data is hypervisor dependent.
*
* Returns a 0 terminated UTF-8 encoded native config datafile, or NULL in case of error.
* the caller must free() the returned value.
*/
char *
virConnectDomainXMLToNative(virConnectPtr conn,
const char *nativeFormat,
const char *domainXml,
unsigned int flags)
{
VIR_DEBUG("conn=%p, format=%s, xml=%s, flags=%x",
conn, NULLSTR(nativeFormat), NULLSTR(domainXml), flags);
virResetLastError();
virCheckConnectReturn(conn, NULL);
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(nativeFormat, error);
virCheckNonNullArgGoto(domainXml, error);
if (conn->driver->connectDomainXMLToNative) {
char *ret;
ret = conn->driver->connectDomainXMLToNative(conn,
nativeFormat,
domainXml,
flags);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return NULL;
}
/*
* Sequence v1:
*
* Dst: Prepare
* - Get ready to accept incoming VM
* - Generate optional cookie to pass to src
*
* Src: Perform
* - Start migration and wait for send completion
* - Kill off VM if successful, resume if failed
*
* Dst: Finish
* - Wait for recv completion and check status
* - Kill off VM if unsuccessful
*
*/
static virDomainPtr
virDomainMigrateVersion1(virDomainPtr domain,
virConnectPtr dconn,
unsigned long flags,
const char *dname,
const char *uri,
unsigned long bandwidth)
{
virDomainPtr ddomain = NULL;
char *uri_out = NULL;
char *cookie = NULL;
int cookielen = 0, ret;
virDomainInfo info;
unsigned int destflags;
VIR_DOMAIN_DEBUG(domain,
"dconn=%p, flags=%lx, dname=%s, uri=%s, bandwidth=%lu",
dconn, flags, NULLSTR(dname), NULLSTR(uri), bandwidth);
ret = virDomainGetInfo(domain, &info);
if (ret == 0 && info.state == VIR_DOMAIN_PAUSED)
flags |= VIR_MIGRATE_PAUSED;
destflags = flags & ~(VIR_MIGRATE_ABORT_ON_ERROR |
VIR_MIGRATE_AUTO_CONVERGE);
/* Prepare the migration.
*
* The destination host may return a cookie, or leave cookie as
* NULL.
*
* The destination host MUST set uri_out if uri_in is NULL.
*
* If uri_in is non-NULL, then the destination host may modify
* the URI by setting uri_out. If it does not wish to modify
* the URI, it should leave uri_out as NULL.
*/
if (dconn->driver->domainMigratePrepare
(dconn, &cookie, &cookielen, uri, &uri_out, destflags, dname,
bandwidth) == -1)
goto done;
if (uri == NULL && uri_out == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("domainMigratePrepare did not set uri"));
goto done;
}
if (uri_out)
uri = uri_out; /* Did domainMigratePrepare change URI? */
/* Perform the migration. The driver isn't supposed to return
* until the migration is complete.
*/
if (domain->conn->driver->domainMigratePerform
(domain, cookie, cookielen, uri, flags, dname, bandwidth) == -1)
goto done;
/* Get the destination domain and return it or error.
* 'domain' no longer actually exists at this point
* (or so we hope), but we still use the object in memory
* in order to get the name.
*/
dname = dname ? dname : domain->name;
if (dconn->driver->domainMigrateFinish)
ddomain = dconn->driver->domainMigrateFinish
(dconn, dname, cookie, cookielen, uri, destflags);
else
ddomain = virDomainLookupByName(dconn, dname);
done:
VIR_FREE(uri_out);
VIR_FREE(cookie);
return ddomain;
}
/*
* Sequence v2:
*
* Src: DumpXML
* - Generate XML to pass to dst
*
* Dst: Prepare
* - Get ready to accept incoming VM
* - Generate optional cookie to pass to src
*
* Src: Perform
* - Start migration and wait for send completion
* - Kill off VM if successful, resume if failed
*
* Dst: Finish
* - Wait for recv completion and check status
* - Kill off VM if unsuccessful
*
*/
static virDomainPtr
virDomainMigrateVersion2(virDomainPtr domain,
virConnectPtr dconn,
unsigned long flags,
const char *dname,
const char *uri,
unsigned long bandwidth)
{
virDomainPtr ddomain = NULL;
char *uri_out = NULL;
char *cookie = NULL;
char *dom_xml = NULL;
int cookielen = 0, ret;
virDomainInfo info;
virErrorPtr orig_err = NULL;
unsigned int getxml_flags = 0;
int cancelled;
unsigned long destflags;
VIR_DOMAIN_DEBUG(domain,
"dconn=%p, flags=%lx, dname=%s, uri=%s, bandwidth=%lu",
dconn, flags, NULLSTR(dname), NULLSTR(uri), bandwidth);
/* Prepare the migration.
*
* The destination host may return a cookie, or leave cookie as
* NULL.
*
* The destination host MUST set uri_out if uri_in is NULL.
*
* If uri_in is non-NULL, then the destination host may modify
* the URI by setting uri_out. If it does not wish to modify
* the URI, it should leave uri_out as NULL.
*/
/* In version 2 of the protocol, the prepare step is slightly
* different. We fetch the domain XML of the source domain
* and pass it to Prepare2.
*/
if (!domain->conn->driver->domainGetXMLDesc) {
virReportUnsupportedError();
return NULL;
}
if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_XML_MIGRATABLE)) {
getxml_flags |= VIR_DOMAIN_XML_MIGRATABLE;
} else {
getxml_flags |= VIR_DOMAIN_XML_SECURE | VIR_DOMAIN_XML_UPDATE_CPU;
}
dom_xml = domain->conn->driver->domainGetXMLDesc(domain, getxml_flags);
if (!dom_xml)
return NULL;
ret = virDomainGetInfo(domain, &info);
if (ret == 0 && info.state == VIR_DOMAIN_PAUSED)
flags |= VIR_MIGRATE_PAUSED;
destflags = flags & ~(VIR_MIGRATE_ABORT_ON_ERROR |
VIR_MIGRATE_AUTO_CONVERGE);
VIR_DEBUG("Prepare2 %p flags=%lx", dconn, destflags);
ret = dconn->driver->domainMigratePrepare2
(dconn, &cookie, &cookielen, uri, &uri_out, destflags, dname,
bandwidth, dom_xml);
VIR_FREE(dom_xml);
if (ret == -1)
goto done;
if (uri == NULL && uri_out == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("domainMigratePrepare2 did not set uri"));
cancelled = 1;
/* Make sure Finish doesn't overwrite the error */
orig_err = virSaveLastError();
goto finish;
}
if (uri_out)
uri = uri_out; /* Did domainMigratePrepare2 change URI? */
/* Perform the migration. The driver isn't supposed to return
* until the migration is complete.
*/
VIR_DEBUG("Perform %p", domain->conn);
ret = domain->conn->driver->domainMigratePerform
(domain, cookie, cookielen, uri, flags, dname, bandwidth);
/* Perform failed. Make sure Finish doesn't overwrite the error */
if (ret < 0)
orig_err = virSaveLastError();
/* If Perform returns < 0, then we need to cancel the VM
* startup on the destination
*/
cancelled = ret < 0 ? 1 : 0;
finish:
/* In version 2 of the migration protocol, we pass the
* status code from the sender to the destination host,
* so it can do any cleanup if the migration failed.
*/
dname = dname ? dname : domain->name;
VIR_DEBUG("Finish2 %p ret=%d", dconn, ret);
ddomain = dconn->driver->domainMigrateFinish2
(dconn, dname, cookie, cookielen, uri, destflags, cancelled);
if (cancelled && ddomain)
VIR_ERROR(_("finish step ignored that migration was cancelled"));
done:
if (orig_err) {
virSetError(orig_err);
virFreeError(orig_err);
}
VIR_FREE(uri_out);
VIR_FREE(cookie);
return ddomain;
}
/*
* Sequence v3:
*
* Src: Begin
* - Generate XML to pass to dst
* - Generate optional cookie to pass to dst
*
* Dst: Prepare
* - Get ready to accept incoming VM
* - Generate optional cookie to pass to src
*
* Src: Perform
* - Start migration and wait for send completion
* - Generate optional cookie to pass to dst
*
* Dst: Finish
* - Wait for recv completion and check status
* - Kill off VM if failed, resume if success
* - Generate optional cookie to pass to src
*
* Src: Confirm
* - Kill off VM if success, resume if failed
*
* If useParams is true, params and nparams contain migration parameters and
* we know it's safe to call the API which supports extensible parameters.
* Otherwise, we have to use xmlin, dname, uri, and bandwidth and pass them
* to the old-style APIs.
*/
static virDomainPtr
virDomainMigrateVersion3Full(virDomainPtr domain,
virConnectPtr dconn,
const char *xmlin,
const char *dname,
const char *uri,
unsigned long long bandwidth,
virTypedParameterPtr params,
int nparams,
bool useParams,
unsigned int flags)
{
virDomainPtr ddomain = NULL;
char *uri_out = NULL;
char *cookiein = NULL;
char *cookieout = NULL;
char *dom_xml = NULL;
int cookieinlen = 0;
int cookieoutlen = 0;
int ret;
virDomainInfo info;
virErrorPtr orig_err = NULL;
int cancelled = 1;
unsigned long protection = 0;
bool notify_source = true;
unsigned int destflags;
int state;
virTypedParameterPtr tmp;
VIR_DOMAIN_DEBUG(domain,
"dconn=%p, xmlin=%s, dname=%s, uri=%s, bandwidth=%llu, "
"params=%p, nparams=%d, useParams=%d, flags=%x",
dconn, NULLSTR(xmlin), NULLSTR(dname), NULLSTR(uri),
bandwidth, params, nparams, useParams, flags);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
if ((!useParams &&
(!domain->conn->driver->domainMigrateBegin3 ||
!domain->conn->driver->domainMigratePerform3 ||
!domain->conn->driver->domainMigrateConfirm3 ||
!dconn->driver->domainMigratePrepare3 ||
!dconn->driver->domainMigrateFinish3)) ||
(useParams &&
(!domain->conn->driver->domainMigrateBegin3Params ||
!domain->conn->driver->domainMigratePerform3Params ||
!domain->conn->driver->domainMigrateConfirm3Params ||
!dconn->driver->domainMigratePrepare3Params ||
!dconn->driver->domainMigrateFinish3Params))) {
virReportUnsupportedError();
return NULL;
}
if (virTypedParamsCopy(&tmp, params, nparams) < 0)
return NULL;
params = tmp;
if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATE_CHANGE_PROTECTION))
protection = VIR_MIGRATE_CHANGE_PROTECTION;
VIR_DEBUG("Begin3 %p", domain->conn);
if (useParams) {
dom_xml = domain->conn->driver->domainMigrateBegin3Params
(domain, params, nparams, &cookieout, &cookieoutlen,
flags | protection);
} else {
dom_xml = domain->conn->driver->domainMigrateBegin3
(domain, xmlin, &cookieout, &cookieoutlen,
flags | protection, dname, bandwidth);
}
if (!dom_xml)
goto done;
if (useParams) {
/* If source is new enough to support extensible migration parameters,
* it's certainly new enough to support virDomainGetState. */
ret = virDomainGetState(domain, &state, NULL, 0);
} else {
ret = virDomainGetInfo(domain, &info);
state = info.state;
}
if (ret == 0 && state == VIR_DOMAIN_PAUSED)
flags |= VIR_MIGRATE_PAUSED;
destflags = flags & ~(VIR_MIGRATE_ABORT_ON_ERROR |
VIR_MIGRATE_AUTO_CONVERGE);
VIR_DEBUG("Prepare3 %p flags=%x", dconn, destflags);
cookiein = cookieout;
cookieinlen = cookieoutlen;
cookieout = NULL;
cookieoutlen = 0;
if (useParams) {
if (virTypedParamsReplaceString(&params, &nparams,
VIR_MIGRATE_PARAM_DEST_XML,
dom_xml) < 0)
goto done;
ret = dconn->driver->domainMigratePrepare3Params
(dconn, params, nparams, cookiein, cookieinlen,
&cookieout, &cookieoutlen, &uri_out, destflags);
} else {
ret = dconn->driver->domainMigratePrepare3
(dconn, cookiein, cookieinlen, &cookieout, &cookieoutlen,
uri, &uri_out, destflags, dname, bandwidth, dom_xml);
}
if (ret == -1) {
if (protection) {
/* Begin already started a migration job so we need to cancel it by
* calling Confirm while making sure it doesn't overwrite the error
*/
orig_err = virSaveLastError();
goto confirm;
} else {
goto done;
}
}
/* Did domainMigratePrepare3 change URI? */
if (uri_out) {
uri = uri_out;
if (useParams &&
virTypedParamsReplaceString(&params, &nparams,
VIR_MIGRATE_PARAM_URI,
uri_out) < 0) {
cancelled = 1;
orig_err = virSaveLastError();
goto finish;
}
} else if (!uri &&
virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_URI, &uri) <= 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("domainMigratePrepare3 did not set uri"));
cancelled = 1;
orig_err = virSaveLastError();
goto finish;
}
if (flags & VIR_MIGRATE_OFFLINE) {
VIR_DEBUG("Offline migration, skipping Perform phase");
VIR_FREE(cookieout);
cookieoutlen = 0;
cancelled = 0;
goto finish;
}
/* Perform the migration. The driver isn't supposed to return
* until the migration is complete. The src VM should remain
* running, but in paused state until the destination can
* confirm migration completion.
*/
VIR_DEBUG("Perform3 %p uri=%s", domain->conn, uri);
VIR_FREE(cookiein);
cookiein = cookieout;
cookieinlen = cookieoutlen;
cookieout = NULL;
cookieoutlen = 0;
/* dconnuri not relevant in non-P2P modes, so left NULL here */
if (useParams) {
ret = domain->conn->driver->domainMigratePerform3Params
(domain, NULL, params, nparams, cookiein, cookieinlen,
&cookieout, &cookieoutlen, flags | protection);
} else {
ret = domain->conn->driver->domainMigratePerform3
(domain, NULL, cookiein, cookieinlen,
&cookieout, &cookieoutlen, NULL,
uri, flags | protection, dname, bandwidth);
}
/* Perform failed. Make sure Finish doesn't overwrite the error */
if (ret < 0) {
orig_err = virSaveLastError();
/* Perform failed so we don't need to call confirm to let source know
* about the failure.
*/
notify_source = false;
}
/* If Perform returns < 0, then we need to cancel the VM
* startup on the destination
*/
cancelled = ret < 0 ? 1 : 0;
finish:
/*
* The status code from the source is passed to the destination.
* The dest can cleanup if the source indicated it failed to
* send all migration data. Returns NULL for ddomain if
* the dest was unable to complete migration.
*/
VIR_DEBUG("Finish3 %p ret=%d", dconn, ret);
VIR_FREE(cookiein);
cookiein = cookieout;
cookieinlen = cookieoutlen;
cookieout = NULL;
cookieoutlen = 0;
if (useParams) {
if (virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_DEST_NAME, NULL) <= 0 &&
virTypedParamsReplaceString(&params, &nparams,
VIR_MIGRATE_PARAM_DEST_NAME,
domain->name) < 0) {
ddomain = NULL;
} else {
ddomain = dconn->driver->domainMigrateFinish3Params
(dconn, params, nparams, cookiein, cookieinlen,
&cookieout, &cookieoutlen, destflags, cancelled);
}
} else {
dname = dname ? dname : domain->name;
ddomain = dconn->driver->domainMigrateFinish3
(dconn, dname, cookiein, cookieinlen, &cookieout, &cookieoutlen,
NULL, uri, destflags, cancelled);
}
if (cancelled) {
if (ddomain) {
VIR_ERROR(_("finish step ignored that migration was cancelled"));
} else {
/* If Finish reported a useful error, use it instead of the
* original "migration unexpectedly failed" error.
*
* This is ugly but we can't do better with the APIs we have. We
* only replace the error if Finish was called with cancelled == 1
* and reported a real error (old libvirt would report an error
* from RPC instead of MIGRATE_FINISH_OK), which only happens when
* the domain died on destination. To further reduce a possibility
* of false positives we also check that Perform returned
* VIR_ERR_OPERATION_FAILED.
*/
if (orig_err &&
orig_err->domain == VIR_FROM_QEMU &&
orig_err->code == VIR_ERR_OPERATION_FAILED) {
virErrorPtr err = virGetLastError();
if (err &&
err->domain == VIR_FROM_QEMU &&
err->code != VIR_ERR_MIGRATE_FINISH_OK) {
virFreeError(orig_err);
orig_err = NULL;
}
}
}
}
/* If ddomain is NULL, then we were unable to start
* the guest on the target, and must restart on the
* source. There is a small chance that the ddomain
* is NULL due to an RPC failure, in which case
* ddomain could in fact be running on the dest.
* The lock manager plugins should take care of
* safety in this scenario.
*/
cancelled = ddomain == NULL ? 1 : 0;
/* If finish3 set an error, and we don't have an earlier
* one we need to preserve it in case confirm3 overwrites
*/
if (!orig_err)
orig_err = virSaveLastError();
confirm:
/*
* If cancelled, then src VM will be restarted, else it will be killed.
* Don't do this if migration failed on source and thus it was already
* cancelled there.
*/
if (notify_source) {
VIR_DEBUG("Confirm3 %p ret=%d domain=%p", domain->conn, ret, domain);
VIR_FREE(cookiein);
cookiein = cookieout;
cookieinlen = cookieoutlen;
cookieout = NULL;
cookieoutlen = 0;
if (useParams) {
ret = domain->conn->driver->domainMigrateConfirm3Params
(domain, params, nparams, cookiein, cookieinlen,
flags | protection, cancelled);
} else {
ret = domain->conn->driver->domainMigrateConfirm3
(domain, cookiein, cookieinlen,
flags | protection, cancelled);
}
/* If Confirm3 returns -1, there's nothing more we can
* do, but fortunately worst case is that there is a
* domain left in 'paused' state on source.
*/
if (ret < 0) {
VIR_WARN("Guest %s probably left in 'paused' state on source",
domain->name);
}
}
done:
if (orig_err) {
virSetError(orig_err);
virFreeError(orig_err);
}
VIR_FREE(dom_xml);
VIR_FREE(uri_out);
VIR_FREE(cookiein);
VIR_FREE(cookieout);
virTypedParamsFree(params, nparams);
return ddomain;
}
static virDomainPtr
virDomainMigrateVersion3(virDomainPtr domain,
virConnectPtr dconn,
const char *xmlin,
unsigned long flags,
const char *dname,
const char *uri,
unsigned long bandwidth)
{
return virDomainMigrateVersion3Full(domain, dconn, xmlin, dname, uri,
bandwidth, NULL, 0, false, flags);
}
static virDomainPtr
virDomainMigrateVersion3Params(virDomainPtr domain,
virConnectPtr dconn,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
return virDomainMigrateVersion3Full(domain, dconn, NULL, NULL, NULL, 0,
params, nparams, true, flags);
}
static int
virDomainMigrateCheckNotLocal(const char *dconnuri)
{
virURIPtr tempuri = NULL;
int ret = -1;
if (!(tempuri = virURIParse(dconnuri)))
goto cleanup;
if (!tempuri->server || STRPREFIX(tempuri->server, "localhost")) {
virReportInvalidArg(dconnuri, "%s",
_("Attempt to migrate guest to the same host"));
goto cleanup;
}
ret = 0;
cleanup:
virURIFree(tempuri);
return ret;
}
static int
virDomainMigrateUnmanagedProto2(virDomainPtr domain,
const char *dconnuri,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
/* uri parameter is added for direct case */
const char *compatParams[] = { VIR_MIGRATE_PARAM_DEST_NAME,
VIR_MIGRATE_PARAM_BANDWIDTH,
VIR_MIGRATE_PARAM_URI };
const char *uri = NULL;
const char *miguri = NULL;
const char *dname = NULL;
unsigned long long bandwidth = 0;
if (!virTypedParamsCheck(params, nparams, compatParams,
ARRAY_CARDINALITY(compatParams))) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("Some parameters are not supported by migration "
"protocol 2"));
return -1;
}
if (virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_URI, &miguri) < 0 ||
virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_DEST_NAME, &dname) < 0 ||
virTypedParamsGetULLong(params, nparams,
VIR_MIGRATE_PARAM_BANDWIDTH, &bandwidth) < 0) {
return -1;
}
if (flags & VIR_MIGRATE_PEER2PEER) {
if (miguri) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Unable to override peer2peer migration URI"));
return -1;
}
uri = dconnuri;
} else {
uri = miguri;
}
return domain->conn->driver->domainMigratePerform
(domain, NULL, 0, uri, flags, dname, bandwidth);
}
static int
virDomainMigrateUnmanagedProto3(virDomainPtr domain,
const char *dconnuri,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
const char *compatParams[] = { VIR_MIGRATE_PARAM_URI,
VIR_MIGRATE_PARAM_DEST_NAME,
VIR_MIGRATE_PARAM_DEST_XML,
VIR_MIGRATE_PARAM_BANDWIDTH };
const char *miguri = NULL;
const char *dname = NULL;
const char *xmlin = NULL;
unsigned long long bandwidth = 0;
if (!virTypedParamsCheck(params, nparams, compatParams,
ARRAY_CARDINALITY(compatParams))) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("Some parameters are not supported by migration "
"protocol 3"));
return -1;
}
if (virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_URI, &miguri) < 0 ||
virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_DEST_NAME, &dname) < 0 ||
virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_DEST_XML, &xmlin) < 0 ||
virTypedParamsGetULLong(params, nparams,
VIR_MIGRATE_PARAM_BANDWIDTH, &bandwidth) < 0) {
return -1;
}
return domain->conn->driver->domainMigratePerform3
(domain, xmlin, NULL, 0, NULL, NULL, dconnuri,
miguri, flags, dname, bandwidth);
}
/*
* In normal migration, the libvirt client co-ordinates communication
* between the 2 libvirtd instances on source & dest hosts.
*
* This function encapsulates 2 alternatives to the above case.
*
* 1. peer-2-peer migration, the libvirt client only talks to the source
* libvirtd instance. The source libvirtd then opens its own
* connection to the destination and co-ordinates migration itself.
*
* 2. direct migration, where there is no requirement for a libvirtd instance
* on the dest host. Eg, XenD can talk direct to XenD, so libvirtd on dest
* does not need to be involved at all, or even running.
*/
static int
virDomainMigrateUnmanagedParams(virDomainPtr domain,
const char *dconnuri,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(domain, "dconnuri=%s, params=%p, nparams=%d, flags=%x",
NULLSTR(dconnuri), params, nparams, flags);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
if ((flags & VIR_MIGRATE_PEER2PEER) &&
virDomainMigrateCheckNotLocal(dconnuri) < 0)
return -1;
if ((flags & VIR_MIGRATE_PEER2PEER) &&
VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_PARAMS)) {
VIR_DEBUG("Using migration protocol 3 with extensible parameters");
if (!domain->conn->driver->domainMigratePerform3Params) {
virReportUnsupportedError();
return -1;
}
return domain->conn->driver->domainMigratePerform3Params
(domain, dconnuri, params, nparams,
NULL, 0, NULL, NULL, flags);
} else if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_V3)) {
VIR_DEBUG("Using migration protocol 3");
if (!domain->conn->driver->domainMigratePerform3) {
virReportUnsupportedError();
return -1;
}
return virDomainMigrateUnmanagedProto3(domain, dconnuri,
params, nparams, flags);
} else {
VIR_DEBUG("Using migration protocol 2");
if (!domain->conn->driver->domainMigratePerform) {
virReportUnsupportedError();
return -1;
}
return virDomainMigrateUnmanagedProto2(domain, dconnuri,
params, nparams, flags);
}
}
static int
virDomainMigrateUnmanaged(virDomainPtr domain,
const char *xmlin,
unsigned int flags,
const char *dname,
const char *dconnuri,
const char *miguri,
unsigned long long bandwidth)
{
int ret = -1;
virTypedParameterPtr params = NULL;
int nparams = 0;
int maxparams = 0;
if (miguri &&
virTypedParamsAddString(&params, &nparams, &maxparams,
VIR_MIGRATE_PARAM_URI, miguri) < 0)
goto cleanup;
if (dname &&
virTypedParamsAddString(&params, &nparams, &maxparams,
VIR_MIGRATE_PARAM_DEST_NAME, dname) < 0)
goto cleanup;
if (xmlin &&
virTypedParamsAddString(&params, &nparams, &maxparams,
VIR_MIGRATE_PARAM_DEST_XML, xmlin) < 0)
goto cleanup;
if (virTypedParamsAddULLong(&params, &nparams, &maxparams,
VIR_MIGRATE_PARAM_BANDWIDTH, bandwidth) < 0)
goto cleanup;
ret = virDomainMigrateUnmanagedParams(domain, dconnuri, params,
nparams, flags);
cleanup:
virTypedParamsFree(params, nparams);
return ret;
}
/**
* virDomainMigrate:
* @domain: a domain object
* @dconn: destination host (a connection object)
* @flags: bitwise-OR of virDomainMigrateFlags
* @dname: (optional) rename domain to this at destination
* @uri: (optional) dest hostname/URI as seen from the source host
* @bandwidth: (optional) specify migration bandwidth limit in MiB/s
*
* Migrate the domain object from its current host to the destination
* host given by dconn (a connection to the destination host).
*
* This function is similar to virDomainMigrate3, but it only supports a fixed
* set of parameters: @dname corresponds to VIR_MIGRATE_PARAM_DEST_NAME, @uri
* is VIR_MIGRATE_PARAM_URI, and @bandwidth is VIR_MIGRATE_PARAM_BANDWIDTH.
*
* virDomainFree should be used to free the resources after the
* returned domain object is no longer needed.
*
* Returns the new domain object if the migration was successful,
* or NULL in case of error. Note that the new domain object
* exists in the scope of the destination connection (dconn).
*/
virDomainPtr
virDomainMigrate(virDomainPtr domain,
virConnectPtr dconn,
unsigned long flags,
const char *dname,
const char *uri,
unsigned long bandwidth)
{
virDomainPtr ddomain = NULL;
VIR_DOMAIN_DEBUG(domain,
"dconn=%p, flags=%lx, dname=%s, uri=%s, bandwidth=%lu",
dconn, flags, NULLSTR(dname), NULLSTR(uri), bandwidth);
virResetLastError();
/* First checkout the source */
virCheckDomainReturn(domain, NULL);
virCheckReadOnlyGoto(domain->conn->flags, error);
/* Now checkout the destination */
virCheckConnectGoto(dconn, error);
virCheckReadOnlyGoto(dconn->flags, error);
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_MIGRATE_NON_SHARED_DISK,
VIR_MIGRATE_NON_SHARED_INC,
error);
if (flags & VIR_MIGRATE_OFFLINE) {
if (!VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_OFFLINE)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("offline migration is not supported by "
"the source host"));
goto error;
}
if (!VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
VIR_DRV_FEATURE_MIGRATION_OFFLINE)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("offline migration is not supported by "
"the destination host"));
goto error;
}
}
if (flags & VIR_MIGRATE_PEER2PEER) {
if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_P2P)) {
char *dstURI = NULL;
if (uri == NULL) {
dstURI = virConnectGetURI(dconn);
if (!dstURI)
return NULL;
}
VIR_DEBUG("Using peer2peer migration");
if (virDomainMigrateUnmanaged(domain, NULL, flags, dname,
uri ? uri : dstURI, NULL, bandwidth) < 0) {
VIR_FREE(dstURI);
goto error;
}
VIR_FREE(dstURI);
ddomain = virDomainLookupByName(dconn, dname ? dname : domain->name);
} else {
/* This driver does not support peer to peer migration */
virReportUnsupportedError();
goto error;
}
} else {
/* Change protection requires support only on source side, and
* is only needed in v3 migration, which automatically re-adds
* the flag for just the source side. We mask it out for
* non-peer2peer to allow migration from newer source to an
* older destination that rejects the flag. */
if (flags & VIR_MIGRATE_CHANGE_PROTECTION &&
!VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATE_CHANGE_PROTECTION)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("cannot enforce change protection"));
goto error;
}
flags &= ~VIR_MIGRATE_CHANGE_PROTECTION;
if (flags & VIR_MIGRATE_TUNNELLED) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot perform tunnelled migration without using peer2peer flag"));
goto error;
}
/* Check that migration is supported by both drivers. */
if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_V3) &&
VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
VIR_DRV_FEATURE_MIGRATION_V3)) {
VIR_DEBUG("Using migration protocol 3");
ddomain = virDomainMigrateVersion3(domain, dconn, NULL,
flags, dname, uri, bandwidth);
} else if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_V2) &&
VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
VIR_DRV_FEATURE_MIGRATION_V2)) {
VIR_DEBUG("Using migration protocol 2");
ddomain = virDomainMigrateVersion2(domain, dconn, flags,
dname, uri, bandwidth);
} else if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_V1) &&
VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
VIR_DRV_FEATURE_MIGRATION_V1)) {
VIR_DEBUG("Using migration protocol 1");
ddomain = virDomainMigrateVersion1(domain, dconn, flags,
dname, uri, bandwidth);
} else {
/* This driver does not support any migration method */
virReportUnsupportedError();
goto error;
}
}
if (ddomain == NULL)
goto error;
return ddomain;
error:
virDispatchError(domain->conn);
return NULL;
}
/**
* virDomainMigrate2:
* @domain: a domain object
* @dconn: destination host (a connection object)
* @flags: bitwise-OR of virDomainMigrateFlags
* @dxml: (optional) XML config for launching guest on target
* @dname: (optional) rename domain to this at destination
* @uri: (optional) dest hostname/URI as seen from the source host
* @bandwidth: (optional) specify migration bandwidth limit in MiB/s
*
* Migrate the domain object from its current host to the destination
* host given by dconn (a connection to the destination host).
*
* This function is similar to virDomainMigrate3, but it only supports a fixed
* set of parameters: @dxml corresponds to VIR_MIGRATE_PARAM_DEST_XML, @dname
* is VIR_MIGRATE_PARAM_DEST_NAME, @uri is VIR_MIGRATE_PARAM_URI, and
* @bandwidth is VIR_MIGRATE_PARAM_BANDWIDTH.
*
* virDomainFree should be used to free the resources after the
* returned domain object is no longer needed.
*
* Returns the new domain object if the migration was successful,
* or NULL in case of error. Note that the new domain object
* exists in the scope of the destination connection (dconn).
*/
virDomainPtr
virDomainMigrate2(virDomainPtr domain,
virConnectPtr dconn,
const char *dxml,
unsigned long flags,
const char *dname,
const char *uri,
unsigned long bandwidth)
{
virDomainPtr ddomain = NULL;
VIR_DOMAIN_DEBUG(domain,
"dconn=%p, flags=%lx, dname=%s, uri=%s, bandwidth=%lu",
dconn, flags, NULLSTR(dname), NULLSTR(uri), bandwidth);
virResetLastError();
/* First checkout the source */
virCheckDomainReturn(domain, NULL);
virCheckReadOnlyGoto(domain->conn->flags, error);
/* Now checkout the destination */
virCheckConnectGoto(dconn, error);
virCheckReadOnlyGoto(dconn->flags, error);
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_MIGRATE_NON_SHARED_DISK,
VIR_MIGRATE_NON_SHARED_INC,
error);
if (flags & VIR_MIGRATE_OFFLINE) {
if (!VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_OFFLINE)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("offline migration is not supported by "
"the source host"));
goto error;
}
if (!VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
VIR_DRV_FEATURE_MIGRATION_OFFLINE)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("offline migration is not supported by "
"the destination host"));
goto error;
}
}
if (flags & VIR_MIGRATE_PEER2PEER) {
if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_P2P)) {
char *dstURI = virConnectGetURI(dconn);
if (!dstURI)
return NULL;
VIR_DEBUG("Using peer2peer migration");
if (virDomainMigrateUnmanaged(domain, dxml, flags, dname,
dstURI, uri, bandwidth) < 0) {
VIR_FREE(dstURI);
goto error;
}
VIR_FREE(dstURI);
ddomain = virDomainLookupByName(dconn, dname ? dname : domain->name);
} else {
/* This driver does not support peer to peer migration */
virReportUnsupportedError();
goto error;
}
} else {
/* Change protection requires support only on source side, and
* is only needed in v3 migration, which automatically re-adds
* the flag for just the source side. We mask it out for
* non-peer2peer to allow migration from newer source to an
* older destination that rejects the flag. */
if (flags & VIR_MIGRATE_CHANGE_PROTECTION &&
!VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATE_CHANGE_PROTECTION)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("cannot enforce change protection"));
goto error;
}
flags &= ~VIR_MIGRATE_CHANGE_PROTECTION;
if (flags & VIR_MIGRATE_TUNNELLED) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot perform tunnelled migration without using peer2peer flag"));
goto error;
}
/* Check that migration is supported by both drivers. */
if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_V3) &&
VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
VIR_DRV_FEATURE_MIGRATION_V3)) {
VIR_DEBUG("Using migration protocol 3");
ddomain = virDomainMigrateVersion3(domain, dconn, dxml,
flags, dname, uri, bandwidth);
} else if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_V2) &&
VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
VIR_DRV_FEATURE_MIGRATION_V2)) {
VIR_DEBUG("Using migration protocol 2");
if (dxml) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("Unable to change target guest XML during migration"));
goto error;
}
ddomain = virDomainMigrateVersion2(domain, dconn, flags,
dname, uri, bandwidth);
} else if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_V1) &&
VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
VIR_DRV_FEATURE_MIGRATION_V1)) {
VIR_DEBUG("Using migration protocol 1");
if (dxml) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("Unable to change target guest XML during migration"));
goto error;
}
ddomain = virDomainMigrateVersion1(domain, dconn, flags,
dname, uri, bandwidth);
} else {
/* This driver does not support any migration method */
virReportUnsupportedError();
goto error;
}
}
if (ddomain == NULL)
goto error;
return ddomain;
error:
virDispatchError(domain->conn);
return NULL;
}
/**
* virDomainMigrate3:
* @domain: a domain object
* @dconn: destination host (a connection object)
* @params: (optional) migration parameters
* @nparams: (optional) number of migration parameters in @params
* @flags: bitwise-OR of virDomainMigrateFlags
*
* Migrate the domain object from its current host to the destination host
* given by dconn (a connection to the destination host).
*
* See VIR_MIGRATE_PARAM_* and virDomainMigrateFlags for detailed description
* of accepted migration parameters and flags.
*
* See virDomainMigrateFlags documentation for description of individual flags.
*
* VIR_MIGRATE_TUNNELLED and VIR_MIGRATE_PEER2PEER are not supported by this
* API, use virDomainMigrateToURI3 instead.
*
* There are many limitations on migration imposed by the underlying
* technology - for example it may not be possible to migrate between
* different processors even with the same architecture, or between
* different types of hypervisor.
*
* virDomainFree should be used to free the resources after the
* returned domain object is no longer needed.
*
* Returns the new domain object if the migration was successful,
* or NULL in case of error. Note that the new domain object
* exists in the scope of the destination connection (dconn).
*/
virDomainPtr
virDomainMigrate3(virDomainPtr domain,
virConnectPtr dconn,
virTypedParameterPtr params,
unsigned int nparams,
unsigned int flags)
{
virDomainPtr ddomain = NULL;
const char *compatParams[] = { VIR_MIGRATE_PARAM_URI,
VIR_MIGRATE_PARAM_DEST_NAME,
VIR_MIGRATE_PARAM_DEST_XML,
VIR_MIGRATE_PARAM_BANDWIDTH };
const char *uri = NULL;
const char *dname = NULL;
const char *dxml = NULL;
unsigned long long bandwidth = 0;
VIR_DOMAIN_DEBUG(domain, "dconn=%p, params=%p, nparms=%u flags=%x",
dconn, params, nparams, flags);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
virResetLastError();
/* First checkout the source */
virCheckDomainReturn(domain, NULL);
virCheckReadOnlyGoto(domain->conn->flags, error);
/* Now checkout the destination */
virCheckReadOnlyGoto(dconn->flags, error);
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_MIGRATE_NON_SHARED_DISK,
VIR_MIGRATE_NON_SHARED_INC,
error);
if (flags & VIR_MIGRATE_PEER2PEER) {
virReportInvalidArg(flags, "%s",
_("use virDomainMigrateToURI3 for peer-to-peer "
"migration"));
goto error;
}
if (flags & VIR_MIGRATE_TUNNELLED) {
virReportInvalidArg(flags, "%s",
_("cannot perform tunnelled migration "
"without using peer2peer flag"));
goto error;
}
if (flags & VIR_MIGRATE_OFFLINE) {
if (!VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_OFFLINE)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("offline migration is not supported by "
"the source host"));
goto error;
}
if (!VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
VIR_DRV_FEATURE_MIGRATION_OFFLINE)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("offline migration is not supported by "
"the destination host"));
goto error;
}
}
/* Change protection requires support only on source side, and
* is only needed in v3 migration, which automatically re-adds
* the flag for just the source side. We mask it out to allow
* migration from newer source to an older destination that
* rejects the flag. */
if (flags & VIR_MIGRATE_CHANGE_PROTECTION &&
!VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATE_CHANGE_PROTECTION)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("cannot enforce change protection"));
goto error;
}
flags &= ~VIR_MIGRATE_CHANGE_PROTECTION;
/* Prefer extensible API but fall back to older migration APIs if params
* only contains parameters which were supported by the older API. */
if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_PARAMS) &&
VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
VIR_DRV_FEATURE_MIGRATION_PARAMS)) {
VIR_DEBUG("Using migration protocol 3 with extensible parameters");
ddomain = virDomainMigrateVersion3Params(domain, dconn, params,
nparams, flags);
goto done;
}
if (!virTypedParamsCheck(params, nparams, compatParams,
ARRAY_CARDINALITY(compatParams))) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("Migration APIs with extensible parameters are not "
"supported but extended parameters were passed"));
goto error;
}
if (virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_URI, &uri) < 0 ||
virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_DEST_NAME, &dname) < 0 ||
virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_DEST_XML, &dxml) < 0 ||
virTypedParamsGetULLong(params, nparams,
VIR_MIGRATE_PARAM_BANDWIDTH, &bandwidth) < 0) {
goto error;
}
if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_V3) &&
VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
VIR_DRV_FEATURE_MIGRATION_V3)) {
VIR_DEBUG("Using migration protocol 3");
ddomain = virDomainMigrateVersion3(domain, dconn, dxml, flags,
dname, uri, bandwidth);
} else if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_V2) &&
VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
VIR_DRV_FEATURE_MIGRATION_V2)) {
VIR_DEBUG("Using migration protocol 2");
if (dxml) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("Unable to change target guest XML during "
"migration"));
goto error;
}
ddomain = virDomainMigrateVersion2(domain, dconn, flags,
dname, uri, bandwidth);
} else if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_V1) &&
VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
VIR_DRV_FEATURE_MIGRATION_V1)) {
VIR_DEBUG("Using migration protocol 1");
if (dxml) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("Unable to change target guest XML during "
"migration"));
goto error;
}
ddomain = virDomainMigrateVersion1(domain, dconn, flags,
dname, uri, bandwidth);
} else {
/* This driver does not support any migration method */
virReportUnsupportedError();
goto error;
}
done:
if (ddomain == NULL)
goto error;
return ddomain;
error:
virDispatchError(domain->conn);
return NULL;
}
static
int virDomainMigrateUnmanagedCheckCompat(virDomainPtr domain,
unsigned int flags)
{
VIR_EXCLUSIVE_FLAGS_RET(VIR_MIGRATE_NON_SHARED_DISK,
VIR_MIGRATE_NON_SHARED_INC,
-1);
if (flags & VIR_MIGRATE_OFFLINE &&
!VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_OFFLINE)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("offline migration is not supported by "
"the source host"));
return -1;
}
if (flags & VIR_MIGRATE_PEER2PEER) {
if (!VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_P2P)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("p2p migration is not supported by "
"the source host"));
return -1;
}
} else {
if (!VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATION_DIRECT)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("direct migration is not supported by "
"the source host"));
return -1;
}
}
return 0;
}
/**
* virDomainMigrateToURI:
* @domain: a domain object
* @duri: mandatory URI for the destination host
* @flags: bitwise-OR of virDomainMigrateFlags
* @dname: (optional) rename domain to this at destination
* @bandwidth: (optional) specify migration bandwidth limit in MiB/s
*
* Migrate the domain object from its current host to the destination
* host given by duri.
*
* This function is similar to virDomainMigrateToURI3, but it only supports a
* fixed set of parameters: @dname corresponds to VIR_MIGRATE_PARAM_DEST_NAME,
* and @bandwidth corresponds to VIR_MIGRATE_PARAM_BANDWIDTH.
*
* The operation of this API hinges on the VIR_MIGRATE_PEER2PEER flag.
*
* If the VIR_MIGRATE_PEER2PEER flag IS set, the @duri parameter must be a
* valid libvirt connection URI, by which the source libvirt driver can connect
* to the destination libvirt. In other words, @duri corresponds to @dconnuri
* of virDomainMigrateToURI3.
*
* If the VIR_MIGRATE_PEER2PEER flag is NOT set, the @duri parameter takes a
* hypervisor specific URI used to initiate the migration. In this case @duri
* corresponds to VIR_MIGRATE_PARAM_URI of virDomainMigrateToURI3.
*
* Returns 0 if the migration succeeded, -1 upon error.
*/
int
virDomainMigrateToURI(virDomainPtr domain,
const char *duri,
unsigned long flags,
const char *dname,
unsigned long bandwidth)
{
const char *dconnuri = NULL;
const char *miguri = NULL;
VIR_DOMAIN_DEBUG(domain, "duri=%p, flags=%lx, dname=%s, bandwidth=%lu",
NULLSTR(duri), flags, NULLSTR(dname), bandwidth);
virResetLastError();
/* First checkout the source */
virCheckDomainReturn(domain, -1);
virCheckReadOnlyGoto(domain->conn->flags, error);
virCheckNonNullArgGoto(duri, error);
if (virDomainMigrateUnmanagedCheckCompat(domain, flags) < 0)
goto error;
if (flags & VIR_MIGRATE_PEER2PEER)
dconnuri = duri;
else
miguri = duri;
if (virDomainMigrateUnmanaged(domain, NULL, flags,
dname, dconnuri, miguri, bandwidth) < 0)
goto error;
return 0;
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainMigrateToURI2:
* @domain: a domain object
* @dconnuri: (optional) URI for target libvirtd if @flags includes VIR_MIGRATE_PEER2PEER
* @miguri: (optional) URI for invoking the migration, not if @flags includs VIR_MIGRATE_TUNNELLED
* @dxml: (optional) XML config for launching guest on target
* @flags: bitwise-OR of virDomainMigrateFlags
* @dname: (optional) rename domain to this at destination
* @bandwidth: (optional) specify migration bandwidth limit in MiB/s
*
* Migrate the domain object from its current host to the destination
* host given by @dconnuri.
*
* This function is similar to virDomainMigrateToURI3, but it only supports a
* fixed set of parameters: @miguri corresponds to VIR_MIGRATE_PARAM_URI, @dxml
* is VIR_MIGRATE_PARAM_DEST_XML, @dname is VIR_MIGRATE_PARAM_DEST_NAME, and
* @bandwidth corresponds to VIR_MIGRATE_PARAM_BANDWIDTH.
*
* The operation of this API hinges on the VIR_MIGRATE_PEER2PEER flag.
*
* If the VIR_MIGRATE_PEER2PEER flag IS set, the @dconnuri parameter must be a
* valid libvirt connection URI, by which the source libvirt driver can connect
* to the destination libvirt. In other words, @dconnuri has the same semantics
* as in virDomainMigrateToURI3.
*
* If the VIR_MIGRATE_PEER2PEER flag is NOT set, the @dconnuri must be NULL
* and the @miguri parameter takes a hypervisor specific URI used to initiate
* the migration. In this case @miguri corresponds to VIR_MIGRATE_PARAM_URI of
* virDomainMigrateToURI3.
*
* Returns 0 if the migration succeeded, -1 upon error.
*/
int
virDomainMigrateToURI2(virDomainPtr domain,
const char *dconnuri,
const char *miguri,
const char *dxml,
unsigned long flags,
const char *dname,
unsigned long bandwidth)
{
VIR_DOMAIN_DEBUG(domain, "dconnuri=%s, miguri=%s, dxml=%s, "
"flags=%lx, dname=%s, bandwidth=%lu",
NULLSTR(dconnuri), NULLSTR(miguri), NULLSTR(dxml),
flags, NULLSTR(dname), bandwidth);
virResetLastError();
/* First checkout the source */
virCheckDomainReturn(domain, -1);
virCheckReadOnlyGoto(domain->conn->flags, error);
if (virDomainMigrateUnmanagedCheckCompat(domain, flags) < 0)
goto error;
if (flags & VIR_MIGRATE_PEER2PEER)
virCheckNonNullArgGoto(dconnuri, error);
else
dconnuri = NULL;
if (virDomainMigrateUnmanaged(domain, dxml, flags,
dname, dconnuri, miguri, bandwidth) < 0)
goto error;
return 0;
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainMigrateToURI3:
* @domain: a domain object
* @dconnuri: (optional) URI for target libvirtd if @flags includes VIR_MIGRATE_PEER2PEER
* @params: (optional) migration parameters
* @nparams: (optional) number of migration parameters in @params
* @flags: bitwise-OR of virDomainMigrateFlags
*
* Migrate the domain object from its current host to the destination host
* given by URI.
*
* See VIR_MIGRATE_PARAM_* and virDomainMigrateFlags for detailed description
* of accepted migration parameters and flags.
*
* The operation of this API hinges on the VIR_MIGRATE_PEER2PEER flag.
*
* If the VIR_MIGRATE_PEER2PEER flag is set, the @dconnuri parameter must be a
* valid libvirt connection URI, by which the source libvirt daemon can connect
* to the destination libvirt.
*
* If the VIR_MIGRATE_PEER2PEER flag is NOT set, then @dconnuri must be NULL
* and VIR_MIGRATE_PARAM_URI migration parameter must be filled in with
* hypervisor specific URI used to initiate the migration. The uri_transports
* element of the hypervisor capabilities XML includes supported URI schemes.
* This is called "direct" migration. Not all hypervisors support this mode of
* migration, so if the VIR_MIGRATE_PEER2PEER flag is not set, then it may be
* necessary to use the alternative virDomainMigrate3 API providing an explicit
* virConnectPtr for the destination host.
*
* There are many limitations on migration imposed by the underlying
* technology - for example it may not be possible to migrate between
* different processors even with the same architecture, or between
* different types of hypervisor.
*
* Returns 0 if the migration succeeded, -1 upon error.
*/
int
virDomainMigrateToURI3(virDomainPtr domain,
const char *dconnuri,
virTypedParameterPtr params,
unsigned int nparams,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(domain, "dconnuri=%s, params=%p, nparms=%u flags=%x",
NULLSTR(dconnuri), params, nparams, flags);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
virResetLastError();
/* First checkout the source */
virCheckDomainReturn(domain, -1);
virCheckReadOnlyGoto(domain->conn->flags, error);
if (virDomainMigrateUnmanagedCheckCompat(domain, flags) < 0)
goto error;
if (flags & VIR_MIGRATE_PEER2PEER)
virCheckNonNullArgGoto(dconnuri, error);
else
dconnuri = NULL;
if (virDomainMigrateUnmanagedParams(domain, dconnuri,
params, nparams, flags) < 0)
goto error;
return 0;
error:
virDispatchError(domain->conn);
return -1;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
int
virDomainMigratePrepare(virConnectPtr dconn,
char **cookie,
int *cookielen,
const char *uri_in,
char **uri_out,
unsigned long flags,
const char *dname,
unsigned long bandwidth)
{
VIR_DEBUG("dconn=%p, cookie=%p, cookielen=%p, uri_in=%s, uri_out=%p, "
"flags=%lx, dname=%s, bandwidth=%lu", dconn, cookie, cookielen,
NULLSTR(uri_in), uri_out, flags, NULLSTR(dname), bandwidth);
virResetLastError();
virCheckConnectReturn(dconn, -1);
virCheckReadOnlyGoto(dconn->flags, error);
if (dconn->driver->domainMigratePrepare) {
int ret;
ret = dconn->driver->domainMigratePrepare(dconn, cookie, cookielen,
uri_in, uri_out,
flags, dname, bandwidth);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dconn);
return -1;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
int
virDomainMigratePerform(virDomainPtr domain,
const char *cookie,
int cookielen,
const char *uri,
unsigned long flags,
const char *dname,
unsigned long bandwidth)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "cookie=%p, cookielen=%d, uri=%s, flags=%lx, "
"dname=%s, bandwidth=%lu", cookie, cookielen, uri, flags,
NULLSTR(dname), bandwidth);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainMigratePerform) {
int ret;
ret = conn->driver->domainMigratePerform(domain, cookie, cookielen,
uri,
flags, dname, bandwidth);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
virDomainPtr
virDomainMigrateFinish(virConnectPtr dconn,
const char *dname,
const char *cookie,
int cookielen,
const char *uri,
unsigned long flags)
{
VIR_DEBUG("dconn=%p, dname=%s, cookie=%p, cookielen=%d, uri=%s, "
"flags=%lx", dconn, NULLSTR(dname), cookie, cookielen,
NULLSTR(uri), flags);
virResetLastError();
virCheckConnectReturn(dconn, NULL);
virCheckReadOnlyGoto(dconn->flags, error);
if (dconn->driver->domainMigrateFinish) {
virDomainPtr ret;
ret = dconn->driver->domainMigrateFinish(dconn, dname,
cookie, cookielen,
uri, flags);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dconn);
return NULL;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
int
virDomainMigratePrepare2(virConnectPtr dconn,
char **cookie,
int *cookielen,
const char *uri_in,
char **uri_out,
unsigned long flags,
const char *dname,
unsigned long bandwidth,
const char *dom_xml)
{
VIR_DEBUG("dconn=%p, cookie=%p, cookielen=%p, uri_in=%s, uri_out=%p,"
"flags=%lx, dname=%s, bandwidth=%lu, dom_xml=%s", dconn,
cookie, cookielen, NULLSTR(uri_in), uri_out, flags, NULLSTR(dname),
bandwidth, NULLSTR(dom_xml));
virResetLastError();
virCheckConnectReturn(dconn, -1);
virCheckReadOnlyGoto(dconn->flags, error);
if (dconn->driver->domainMigratePrepare2) {
int ret;
ret = dconn->driver->domainMigratePrepare2(dconn, cookie, cookielen,
uri_in, uri_out,
flags, dname, bandwidth,
dom_xml);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dconn);
return -1;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
virDomainPtr
virDomainMigrateFinish2(virConnectPtr dconn,
const char *dname,
const char *cookie,
int cookielen,
const char *uri,
unsigned long flags,
int retcode)
{
VIR_DEBUG("dconn=%p, dname=%s, cookie=%p, cookielen=%d, uri=%s, "
"flags=%lx, retcode=%d", dconn, NULLSTR(dname), cookie,
cookielen, NULLSTR(uri), flags, retcode);
virResetLastError();
virCheckConnectReturn(dconn, NULL);
virCheckReadOnlyGoto(dconn->flags, error);
if (dconn->driver->domainMigrateFinish2) {
virDomainPtr ret;
ret = dconn->driver->domainMigrateFinish2(dconn, dname,
cookie, cookielen,
uri, flags,
retcode);
if (!ret && !retcode)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dconn);
return NULL;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
int
virDomainMigratePrepareTunnel(virConnectPtr conn,
virStreamPtr st,
unsigned long flags,
const char *dname,
unsigned long bandwidth,
const char *dom_xml)
{
VIR_DEBUG("conn=%p, stream=%p, flags=%lx, dname=%s, "
"bandwidth=%lu, dom_xml=%s", conn, st, flags,
NULLSTR(dname), bandwidth, NULLSTR(dom_xml));
virResetLastError();
virCheckConnectReturn(conn, -1);
virCheckReadOnlyGoto(conn->flags, error);
if (conn != st->conn) {
virReportInvalidArg(conn, "%s",
_("conn must match stream connection"));
goto error;
}
if (conn->driver->domainMigratePrepareTunnel) {
int rv = conn->driver->domainMigratePrepareTunnel(conn, st,
flags, dname,
bandwidth, dom_xml);
if (rv < 0)
goto error;
return rv;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
char *
virDomainMigrateBegin3(virDomainPtr domain,
const char *xmlin,
char **cookieout,
int *cookieoutlen,
unsigned long flags,
const char *dname,
unsigned long bandwidth)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "xmlin=%s cookieout=%p, cookieoutlen=%p, "
"flags=%lx, dname=%s, bandwidth=%lu",
NULLSTR(xmlin), cookieout, cookieoutlen, flags,
NULLSTR(dname), bandwidth);
virResetLastError();
virCheckDomainReturn(domain, NULL);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainMigrateBegin3) {
char *xml;
xml = conn->driver->domainMigrateBegin3(domain, xmlin,
cookieout, cookieoutlen,
flags, dname, bandwidth);
VIR_DEBUG("xml %s", NULLSTR(xml));
if (!xml)
goto error;
return xml;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return NULL;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
int
virDomainMigratePrepare3(virConnectPtr dconn,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
const char *uri_in,
char **uri_out,
unsigned long flags,
const char *dname,
unsigned long bandwidth,
const char *dom_xml)
{
VIR_DEBUG("dconn=%p, cookiein=%p, cookieinlen=%d, cookieout=%p, "
"cookieoutlen=%p, uri_in=%s, uri_out=%p, flags=%lx, dname=%s, "
"bandwidth=%lu, dom_xml=%s",
dconn, cookiein, cookieinlen, cookieout, cookieoutlen, NULLSTR(uri_in),
uri_out, flags, NULLSTR(dname), bandwidth, NULLSTR(dom_xml));
virResetLastError();
virCheckConnectReturn(dconn, -1);
virCheckReadOnlyGoto(dconn->flags, error);
if (dconn->driver->domainMigratePrepare3) {
int ret;
ret = dconn->driver->domainMigratePrepare3(dconn,
cookiein, cookieinlen,
cookieout, cookieoutlen,
uri_in, uri_out,
flags, dname, bandwidth,
dom_xml);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dconn);
return -1;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
int
virDomainMigratePrepareTunnel3(virConnectPtr conn,
virStreamPtr st,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
unsigned long flags,
const char *dname,
unsigned long bandwidth,
const char *dom_xml)
{
VIR_DEBUG("conn=%p, stream=%p, cookiein=%p, cookieinlen=%d, cookieout=%p, "
"cookieoutlen=%p, flags=%lx, dname=%s, bandwidth=%lu, "
"dom_xml=%s",
conn, st, cookiein, cookieinlen, cookieout, cookieoutlen, flags,
NULLSTR(dname), bandwidth, NULLSTR(dom_xml));
virResetLastError();
virCheckConnectReturn(conn, -1);
virCheckReadOnlyGoto(conn->flags, error);
if (conn != st->conn) {
virReportInvalidArg(conn, "%s",
_("conn must match stream connection"));
goto error;
}
if (conn->driver->domainMigratePrepareTunnel3) {
int rv = conn->driver->domainMigratePrepareTunnel3(conn, st,
cookiein, cookieinlen,
cookieout, cookieoutlen,
flags, dname,
bandwidth, dom_xml);
if (rv < 0)
goto error;
return rv;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
int
virDomainMigratePerform3(virDomainPtr domain,
const char *xmlin,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
const char *dconnuri,
const char *uri,
unsigned long flags,
const char *dname,
unsigned long bandwidth)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "xmlin=%s cookiein=%p, cookieinlen=%d, "
"cookieout=%p, cookieoutlen=%p, dconnuri=%s, "
"uri=%s, flags=%lx, dname=%s, bandwidth=%lu",
NULLSTR(xmlin), cookiein, cookieinlen,
cookieout, cookieoutlen, NULLSTR(dconnuri),
NULLSTR(uri), flags, NULLSTR(dname), bandwidth);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainMigratePerform3) {
int ret;
ret = conn->driver->domainMigratePerform3(domain, xmlin,
cookiein, cookieinlen,
cookieout, cookieoutlen,
dconnuri, uri,
flags, dname, bandwidth);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
virDomainPtr
virDomainMigrateFinish3(virConnectPtr dconn,
const char *dname,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
const char *dconnuri,
const char *uri,
unsigned long flags,
int cancelled)
{
VIR_DEBUG("dconn=%p, dname=%s, cookiein=%p, cookieinlen=%d, cookieout=%p,"
"cookieoutlen=%p, dconnuri=%s, uri=%s, flags=%lx, retcode=%d",
dconn, NULLSTR(dname), cookiein, cookieinlen, cookieout,
cookieoutlen, NULLSTR(dconnuri), NULLSTR(uri), flags, cancelled);
virResetLastError();
virCheckConnectReturn(dconn, NULL);
virCheckReadOnlyGoto(dconn->flags, error);
if (dconn->driver->domainMigrateFinish3) {
virDomainPtr ret;
ret = dconn->driver->domainMigrateFinish3(dconn, dname,
cookiein, cookieinlen,
cookieout, cookieoutlen,
dconnuri, uri, flags,
cancelled);
if (!ret && !cancelled)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dconn);
return NULL;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
int
virDomainMigrateConfirm3(virDomainPtr domain,
const char *cookiein,
int cookieinlen,
unsigned long flags,
int cancelled)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain,
"cookiein=%p, cookieinlen=%d, flags=%lx, cancelled=%d",
cookiein, cookieinlen, flags, cancelled);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainMigrateConfirm3) {
int ret;
ret = conn->driver->domainMigrateConfirm3(domain,
cookiein, cookieinlen,
flags, cancelled);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
char *
virDomainMigrateBegin3Params(virDomainPtr domain,
virTypedParameterPtr params,
int nparams,
char **cookieout,
int *cookieoutlen,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, "
"cookieout=%p, cookieoutlen=%p, flags=%x",
params, nparams, cookieout, cookieoutlen, flags);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
virResetLastError();
virCheckDomainReturn(domain, NULL);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainMigrateBegin3Params) {
char *xml;
xml = conn->driver->domainMigrateBegin3Params(domain, params, nparams,
cookieout, cookieoutlen,
flags);
VIR_DEBUG("xml %s", NULLSTR(xml));
if (!xml)
goto error;
return xml;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return NULL;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
int
virDomainMigratePrepare3Params(virConnectPtr dconn,
virTypedParameterPtr params,
int nparams,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
char **uri_out,
unsigned int flags)
{
VIR_DEBUG("dconn=%p, params=%p, nparams=%d, cookiein=%p, cookieinlen=%d, "
"cookieout=%p, cookieoutlen=%p, uri_out=%p, flags=%x",
dconn, params, nparams, cookiein, cookieinlen,
cookieout, cookieoutlen, uri_out, flags);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
virResetLastError();
virCheckConnectReturn(dconn, -1);
virCheckReadOnlyGoto(dconn->flags, error);
if (dconn->driver->domainMigratePrepare3Params) {
int ret;
ret = dconn->driver->domainMigratePrepare3Params(dconn, params, nparams,
cookiein, cookieinlen,
cookieout, cookieoutlen,
uri_out, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dconn);
return -1;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
int
virDomainMigratePrepareTunnel3Params(virConnectPtr conn,
virStreamPtr st,
virTypedParameterPtr params,
int nparams,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
unsigned int flags)
{
VIR_DEBUG("conn=%p, stream=%p, params=%p, nparams=%d, cookiein=%p, "
"cookieinlen=%d, cookieout=%p, cookieoutlen=%p, flags=%x",
conn, st, params, nparams, cookiein, cookieinlen,
cookieout, cookieoutlen, flags);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
virResetLastError();
virCheckConnectReturn(conn, -1);
virCheckReadOnlyGoto(conn->flags, error);
if (conn != st->conn) {
virReportInvalidArg(conn, "%s",
_("conn must match stream connection"));
goto error;
}
if (conn->driver->domainMigratePrepareTunnel3Params) {
int rv;
rv = conn->driver->domainMigratePrepareTunnel3Params(
conn, st, params, nparams, cookiein, cookieinlen,
cookieout, cookieoutlen, flags);
if (rv < 0)
goto error;
return rv;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
int
virDomainMigratePerform3Params(virDomainPtr domain,
const char *dconnuri,
virTypedParameterPtr params,
int nparams,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "dconnuri=%s, params=%p, nparams=%d, cookiein=%p, "
"cookieinlen=%d, cookieout=%p, cookieoutlen=%p, flags=%x",
NULLSTR(dconnuri), params, nparams, cookiein,
cookieinlen, cookieout, cookieoutlen, flags);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainMigratePerform3Params) {
int ret;
ret = conn->driver->domainMigratePerform3Params(
domain, dconnuri, params, nparams, cookiein, cookieinlen,
cookieout, cookieoutlen, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
virDomainPtr
virDomainMigrateFinish3Params(virConnectPtr dconn,
virTypedParameterPtr params,
int nparams,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
unsigned int flags,
int cancelled)
{
VIR_DEBUG("dconn=%p, params=%p, nparams=%d, cookiein=%p, cookieinlen=%d, "
"cookieout=%p, cookieoutlen=%p, flags=%x, cancelled=%d",
dconn, params, nparams, cookiein, cookieinlen, cookieout,
cookieoutlen, flags, cancelled);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
virResetLastError();
virCheckConnectReturn(dconn, NULL);
virCheckReadOnlyGoto(dconn->flags, error);
if (dconn->driver->domainMigrateFinish3Params) {
virDomainPtr ret;
ret = dconn->driver->domainMigrateFinish3Params(
dconn, params, nparams, cookiein, cookieinlen,
cookieout, cookieoutlen, flags, cancelled);
if (!ret && !cancelled)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dconn);
return NULL;
}
/*
* Not for public use. This function is part of the internal
* implementation of migration in the remote case.
*/
int
virDomainMigrateConfirm3Params(virDomainPtr domain,
virTypedParameterPtr params,
int nparams,
const char *cookiein,
int cookieinlen,
unsigned int flags,
int cancelled)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, cookiein=%p, "
"cookieinlen=%d, flags=%x, cancelled=%d",
params, nparams, cookiein, cookieinlen, flags, cancelled);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainMigrateConfirm3Params) {
int ret;
ret = conn->driver->domainMigrateConfirm3Params(
domain, params, nparams,
cookiein, cookieinlen, flags, cancelled);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetSchedulerType:
* @domain: pointer to domain object
* @nparams: pointer to number of scheduler parameters, can be NULL
* (return value)
*
* Get the scheduler type and the number of scheduler parameters.
*
* Returns NULL in case of error. The caller must free the returned string.
*/
char *
virDomainGetSchedulerType(virDomainPtr domain, int *nparams)
{
virConnectPtr conn;
char *schedtype;
VIR_DOMAIN_DEBUG(domain, "nparams=%p", nparams);
virResetLastError();
virCheckDomainReturn(domain, NULL);
conn = domain->conn;
if (conn->driver->domainGetSchedulerType) {
schedtype = conn->driver->domainGetSchedulerType(domain, nparams);
if (!schedtype)
goto error;
return schedtype;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return NULL;
}
/**
* virDomainGetSchedulerParameters:
* @domain: pointer to domain object
* @params: pointer to scheduler parameter objects
* (return value)
* @nparams: pointer to number of scheduler parameter objects
* (this value should generally be as large as the returned value
* nparams of virDomainGetSchedulerType()); input and output
*
* Get all scheduler parameters. On input, @nparams gives the size of the
* @params array; on output, @nparams gives how many slots were filled
* with parameter information, which might be less but will not exceed
* the input value. @nparams cannot be 0.
*
* It is hypervisor specific whether this returns the live or
* persistent state; for more control, use
* virDomainGetSchedulerParametersFlags().
*
* Returns -1 in case of error, 0 in case of success.
*/
int
virDomainGetSchedulerParameters(virDomainPtr domain,
virTypedParameterPtr params, int *nparams)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%p", params, nparams);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(params, error);
virCheckNonNullArgGoto(nparams, error);
virCheckPositiveArgGoto(*nparams, error);
conn = domain->conn;
if (conn->driver->domainGetSchedulerParameters) {
int ret;
ret = conn->driver->domainGetSchedulerParameters(domain, params, nparams);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetSchedulerParametersFlags:
* @domain: pointer to domain object
* @params: pointer to scheduler parameter object
* (return value)
* @nparams: pointer to number of scheduler parameter
* (this value should be same than the returned value
* nparams of virDomainGetSchedulerType()); input and output
* @flags: bitwise-OR of virDomainModificationImpact and virTypedParameterFlags
*
* Get all scheduler parameters. On input, @nparams gives the size of the
* @params array; on output, @nparams gives how many slots were filled
* with parameter information, which might be less but will not exceed
* the input value. @nparams cannot be 0.
*
* The value of @flags can be exactly VIR_DOMAIN_AFFECT_CURRENT,
* VIR_DOMAIN_AFFECT_LIVE, or VIR_DOMAIN_AFFECT_CONFIG.
*
* Here is a sample code snippet:
*
* char *ret = virDomainGetSchedulerType(dom, &nparams);
* if (ret && nparams != 0) {
* if ((params = malloc(sizeof(*params) * nparams)) == NULL)
* goto error;
* memset(params, 0, sizeof(*params) * nparams);
* if (virDomainGetSchedulerParametersFlags(dom, params, &nparams, 0))
* goto error;
* }
*
* Returns -1 in case of error, 0 in case of success.
*/
int
virDomainGetSchedulerParametersFlags(virDomainPtr domain,
virTypedParameterPtr params, int *nparams,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%p, flags=%x",
params, nparams, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(params, error);
virCheckNonNullArgGoto(nparams, error);
virCheckPositiveArgGoto(*nparams, error);
if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_TYPED_PARAM_STRING))
flags |= VIR_TYPED_PARAM_STRING_OKAY;
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
VIR_DOMAIN_AFFECT_CONFIG,
error);
conn = domain->conn;
if (conn->driver->domainGetSchedulerParametersFlags) {
int ret;
ret = conn->driver->domainGetSchedulerParametersFlags(domain, params,
nparams, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSetSchedulerParameters:
* @domain: pointer to domain object
* @params: pointer to scheduler parameter objects
* @nparams: number of scheduler parameter objects
* (this value can be the same or less than the returned value
* nparams of virDomainGetSchedulerType)
*
* Change all or a subset or the scheduler parameters. It is
* hypervisor-specific whether this sets live, persistent, or both
* settings; for more control, use
* virDomainSetSchedulerParametersFlags.
*
* Returns -1 in case of error, 0 in case of success.
*/
int
virDomainSetSchedulerParameters(virDomainPtr domain,
virTypedParameterPtr params, int nparams)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d", params, nparams);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(params, error);
virCheckNonNegativeArgGoto(nparams, error);
if (virTypedParameterValidateSet(conn, params, nparams) < 0)
goto error;
if (conn->driver->domainSetSchedulerParameters) {
int ret;
ret = conn->driver->domainSetSchedulerParameters(domain, params, nparams);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSetSchedulerParametersFlags:
* @domain: pointer to domain object
* @params: pointer to scheduler parameter objects
* @nparams: number of scheduler parameter objects
* (this value can be the same or less than the returned value
* nparams of virDomainGetSchedulerType)
* @flags: bitwise-OR of virDomainModificationImpact
*
* Change a subset or all scheduler parameters. The value of @flags
* should be either VIR_DOMAIN_AFFECT_CURRENT, or a bitwise-or of
* values from VIR_DOMAIN_AFFECT_LIVE and
* VIR_DOMAIN_AFFECT_CURRENT, although hypervisors vary in which
* flags are supported.
*
* Returns -1 in case of error, 0 in case of success.
*/
int
virDomainSetSchedulerParametersFlags(virDomainPtr domain,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, flags=%x",
params, nparams, flags);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(params, error);
virCheckNonNegativeArgGoto(nparams, error);
if (virTypedParameterValidateSet(conn, params, nparams) < 0)
goto error;
if (conn->driver->domainSetSchedulerParametersFlags) {
int ret;
ret = conn->driver->domainSetSchedulerParametersFlags(domain,
params,
nparams,
flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainBlockStats:
* @dom: pointer to the domain object
* @disk: path to the block device, or device shorthand
* @stats: block device stats (returned)
* @size: size of stats structure
*
* This function returns block device (disk) stats for block
* devices attached to the domain.
*
* The @disk parameter is either the device target shorthand (the
* <target dev='...'/> sub-element, such as "vda"), or (since 0.9.8)
* an unambiguous source name of the block device (the <source
* file='...'/> sub-element, such as "/path/to/image"). Valid names
* can be found by calling virDomainGetXMLDesc() and inspecting
* elements within //domain/devices/disk. Some drivers might also
* accept the empty string for the @disk parameter, and then yield
* summary stats for the entire domain.
*
* Domains may have more than one block device. To get stats for
* each you should make multiple calls to this function.
*
* Individual fields within the stats structure may be returned
* as -1, which indicates that the hypervisor does not support
* that particular statistic.
*
* Returns: 0 in case of success or -1 in case of failure.
*/
int
virDomainBlockStats(virDomainPtr dom, const char *disk,
virDomainBlockStatsPtr stats, size_t size)
{
virConnectPtr conn;
virDomainBlockStatsStruct stats2 = { -1, -1, -1, -1, -1 };
VIR_DOMAIN_DEBUG(dom, "disk=%s, stats=%p, size=%zi", disk, stats, size);
virResetLastError();
virCheckDomainReturn(dom, -1);
virCheckNonNullArgGoto(disk, error);
virCheckNonNullArgGoto(stats, error);
if (size > sizeof(stats2)) {
virReportInvalidArg(size,
_("size must not exceed %zu"),
sizeof(stats2));
goto error;
}
conn = dom->conn;
if (conn->driver->domainBlockStats) {
if (conn->driver->domainBlockStats(dom, disk, &stats2) == -1)
goto error;
memcpy(stats, &stats2, size);
return 0;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainBlockStatsFlags:
* @dom: pointer to domain object
* @disk: path to the block device, or device shorthand
* @params: pointer to block stats parameter object
* (return value, allocated by the caller)
* @nparams: pointer to number of block stats; input and output
* @flags: bitwise-OR of virTypedParameterFlags
*
* This function is to get block stats parameters for block
* devices attached to the domain.
*
* The @disk parameter is either the device target shorthand (the
* <target dev='...'/> sub-element, such as "vda"), or (since 0.9.8)
* an unambiguous source name of the block device (the <source
* file='...'/> sub-element, such as "/path/to/image"). Valid names
* can be found by calling virDomainGetXMLDesc() and inspecting
* elements within //domain/devices/disk. Some drivers might also
* accept the empty string for the @disk parameter, and then yield
* summary stats for the entire domain.
*
* Domains may have more than one block device. To get stats for
* each you should make multiple calls to this function.
*
* On input, @nparams gives the size of the @params array; on output,
* @nparams gives how many slots were filled with parameter
* information, which might be less but will not exceed the input
* value.
*
* As a special case, calling with @params as NULL and @nparams as 0 on
* input will cause @nparams on output to contain the number of parameters
* supported by the hypervisor. (Note that block devices of different types
* might support different parameters, so it might be necessary to compute
* @nparams for each block device). The caller should then allocate @params
* array, i.e. (sizeof(@virTypedParameter) * @nparams) bytes and call the API
* again. See virDomainGetMemoryParameters() for more details.
*
* Returns -1 in case of error, 0 in case of success.
*/
int
virDomainBlockStatsFlags(virDomainPtr dom,
const char *disk,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "disk=%s, params=%p, nparams=%d, flags=%x",
disk, params, nparams ? *nparams : -1, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
virCheckNonNullArgGoto(disk, error);
virCheckNonNullArgGoto(nparams, error);
virCheckNonNegativeArgGoto(*nparams, error);
if (*nparams != 0)
virCheckNonNullArgGoto(params, error);
if (VIR_DRV_SUPPORTS_FEATURE(dom->conn->driver, dom->conn,
VIR_DRV_FEATURE_TYPED_PARAM_STRING))
flags |= VIR_TYPED_PARAM_STRING_OKAY;
conn = dom->conn;
if (conn->driver->domainBlockStatsFlags) {
int ret;
ret = conn->driver->domainBlockStatsFlags(dom, disk, params, nparams, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainInterfaceStats:
* @dom: pointer to the domain object
* @path: path to the interface
* @stats: network interface stats (returned)
* @size: size of stats structure
*
* This function returns network interface stats for interfaces
* attached to the domain.
*
* The path parameter is the name of the network interface.
*
* Domains may have more than one network interface. To get stats for
* each you should make multiple calls to this function.
*
* Individual fields within the stats structure may be returned
* as -1, which indicates that the hypervisor does not support
* that particular statistic.
*
* Returns: 0 in case of success or -1 in case of failure.
*/
int
virDomainInterfaceStats(virDomainPtr dom, const char *path,
virDomainInterfaceStatsPtr stats, size_t size)
{
virConnectPtr conn;
virDomainInterfaceStatsStruct stats2 = { -1, -1, -1, -1,
-1, -1, -1, -1 };
VIR_DOMAIN_DEBUG(dom, "path=%s, stats=%p, size=%zi",
path, stats, size);
virResetLastError();
virCheckDomainReturn(dom, -1);
virCheckNonNullArgGoto(path, error);
virCheckNonNullArgGoto(stats, error);
if (size > sizeof(stats2)) {
virReportInvalidArg(size,
_("size must not exceed %zu"),
sizeof(stats2));
goto error;
}
conn = dom->conn;
if (conn->driver->domainInterfaceStats) {
if (conn->driver->domainInterfaceStats(dom, path, &stats2) == -1)
goto error;
memcpy(stats, &stats2, size);
return 0;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainSetInterfaceParameters:
* @domain: pointer to domain object
* @device: the interface name or mac address
* @params: pointer to interface parameter objects
* @nparams: number of interface parameter (this value can be the same or
* less than the number of parameters supported)
* @flags: bitwise-OR of virDomainModificationImpact
*
* Change a subset or all parameters of interface; currently this
* includes bandwidth parameters. The value of @flags should be
* either VIR_DOMAIN_AFFECT_CURRENT, or a bitwise-or of values
* VIR_DOMAIN_AFFECT_LIVE and VIR_DOMAIN_AFFECT_CONFIG, although
* hypervisors vary in which flags are supported.
*
* This function may require privileged access to the hypervisor.
*
* Returns -1 in case of error, 0 in case of success.
*/
int
virDomainSetInterfaceParameters(virDomainPtr domain,
const char *device,
virTypedParameterPtr params,
int nparams, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "device=%s, params=%p, nparams=%d, flags=%x",
device, params, nparams, flags);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(params, error);
virCheckPositiveArgGoto(nparams, error);
if (virTypedParameterValidateSet(conn, params, nparams) < 0)
goto error;
if (conn->driver->domainSetInterfaceParameters) {
int ret;
ret = conn->driver->domainSetInterfaceParameters(domain, device,
params, nparams,
flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetInterfaceParameters:
* @domain: pointer to domain object
* @device: the interface name or mac address
* @params: pointer to interface parameter objects
* (return value, allocated by the caller)
* @nparams: pointer to number of interface parameter; input and output
* @flags: bitwise-OR of virDomainModificationImpact and virTypedParameterFlags
*
* Get all interface parameters. On input, @nparams gives the size of
* the @params array; on output, @nparams gives how many slots were
* filled with parameter information, which might be less but will not
* exceed the input value.
*
* As a special case, calling with @params as NULL and @nparams as 0 on
* input will cause @nparams on output to contain the number of parameters
* supported by the hypervisor. The caller should then allocate @params
* array, i.e. (sizeof(@virTypedParameter) * @nparams) bytes and call the
* API again. See virDomainGetMemoryParameters() for an equivalent usage
* example.
*
* This function may require privileged access to the hypervisor. This function
* expects the caller to allocate the @params.
*
* Returns -1 in case of error, 0 in case of success.
*/
int
virDomainGetInterfaceParameters(virDomainPtr domain,
const char *device,
virTypedParameterPtr params,
int *nparams, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "device=%s, params=%p, nparams=%d, flags=%x",
device, params, (nparams) ? *nparams : -1, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(nparams, error);
virCheckNonNegativeArgGoto(*nparams, error);
if (*nparams != 0)
virCheckNonNullArgGoto(params, error);
if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_TYPED_PARAM_STRING))
flags |= VIR_TYPED_PARAM_STRING_OKAY;
conn = domain->conn;
if (conn->driver->domainGetInterfaceParameters) {
int ret;
ret = conn->driver->domainGetInterfaceParameters(domain, device,
params, nparams,
flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainMemoryStats:
* @dom: pointer to the domain object
* @stats: nr_stats-sized array of stat structures (returned)
* @nr_stats: number of memory statistics requested
* @flags: extra flags; not used yet, so callers should always pass 0
*
* This function provides memory statistics for the domain.
*
* Up to 'nr_stats' elements of 'stats' will be populated with memory statistics
* from the domain. Only statistics supported by the domain, the driver, and
* this version of libvirt will be returned.
*
* Memory Statistics:
*
* VIR_DOMAIN_MEMORY_STAT_SWAP_IN:
* The total amount of data read from swap space (in kb).
* VIR_DOMAIN_MEMORY_STAT_SWAP_OUT:
* The total amount of memory written out to swap space (in kb).
* VIR_DOMAIN_MEMORY_STAT_MAJOR_FAULT:
* The number of page faults that required disk IO to service.
* VIR_DOMAIN_MEMORY_STAT_MINOR_FAULT:
* The number of page faults serviced without disk IO.
* VIR_DOMAIN_MEMORY_STAT_UNUSED:
* The amount of memory which is not being used for any purpose (in kb).
* VIR_DOMAIN_MEMORY_STAT_AVAILABLE:
* The total amount of memory available to the domain's OS (in kb).
* VIR_DOMAIN_MEMORY_STAT_USABLE:
* How much the balloon can be inflated without pushing the guest system
* to swap, corresponds to 'Available' in /proc/meminfo
* VIR_DOMAIN_MEMORY_STAT_ACTUAL_BALLOON:
* Current balloon value (in kb).
* VIR_DOMAIN_MEMORY_STAT_LAST_UPDATE
* Timestamp of the last statistic
*
* Returns: The number of stats provided or -1 in case of failure.
*/
int
virDomainMemoryStats(virDomainPtr dom, virDomainMemoryStatPtr stats,
unsigned int nr_stats, unsigned int flags)
{
virConnectPtr conn;
unsigned long nr_stats_ret = 0;
VIR_DOMAIN_DEBUG(dom, "stats=%p, nr_stats=%u, flags=%x",
stats, nr_stats, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
if (!stats || nr_stats == 0)
return 0;
if (nr_stats > VIR_DOMAIN_MEMORY_STAT_NR)
nr_stats = VIR_DOMAIN_MEMORY_STAT_NR;
conn = dom->conn;
if (conn->driver->domainMemoryStats) {
nr_stats_ret = conn->driver->domainMemoryStats(dom, stats, nr_stats,
flags);
if (nr_stats_ret == -1)
goto error;
return nr_stats_ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainBlockPeek:
* @dom: pointer to the domain object
* @disk: path to the block device, or device shorthand
* @offset: offset within block device
* @size: size to read
* @buffer: return buffer (must be at least size bytes)
* @flags: extra flags; not used yet, so callers should always pass 0
*
* This function allows you to read the contents of a domain's
* disk device.
*
* Typical uses for this are to determine if the domain has
* written a Master Boot Record (indicating that the domain
* has completed installation), or to try to work out the state
* of the domain's filesystems.
*
* (Note that in the local case you might try to open the
* block device or file directly, but that won't work in the
* remote case, nor if you don't have sufficient permission.
* Hence the need for this call).
*
* The @disk parameter is either an unambiguous source name of the
* block device (the <source file='...'/> sub-element, such as
* "/path/to/image"), or (since 0.9.5) the device target shorthand
* (the <target dev='...'/> sub-element, such as "vda"). Valid names
* can be found by calling virDomainGetXMLDesc() and inspecting
* elements within //domain/devices/disk.
*
* 'offset' and 'size' represent an area which must lie entirely
* within the device or file. 'size' may be 0 to test if the
* call would succeed.
*
* 'buffer' is the return buffer and must be at least 'size' bytes.
*
* NB. The remote driver imposes a 64K byte limit on 'size'.
* For your program to be able to work reliably over a remote
* connection you should split large requests to <= 65536 bytes.
* However, with 0.9.13 this RPC limit has been raised to 1M byte.
* Starting with version 1.0.6 the RPC limit has been raised again.
* Now large requests up to 16M byte are supported.
*
* Returns: 0 in case of success or -1 in case of failure.
*/
int
virDomainBlockPeek(virDomainPtr dom,
const char *disk,
unsigned long long offset /* really 64 bits */,
size_t size,
void *buffer,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "disk=%s, offset=%lld, size=%zi, buffer=%p, flags=%x",
disk, offset, size, buffer, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
conn = dom->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonEmptyStringArgGoto(disk, error);
/* Allow size == 0 as an access test. */
if (size > 0)
virCheckNonNullArgGoto(buffer, error);
if (conn->driver->domainBlockPeek) {
int ret;
ret = conn->driver->domainBlockPeek(dom, disk, offset, size,
buffer, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainBlockResize:
* @dom: pointer to the domain object
* @disk: path to the block image, or shorthand
* @size: new size of the block image, see below for unit
* @flags: bitwise-OR of virDomainBlockResizeFlags
*
* Resize a block device of domain while the domain is running. If
* @flags is 0, then @size is in kibibytes (blocks of 1024 bytes);
* since 0.9.11, if @flags includes VIR_DOMAIN_BLOCK_RESIZE_BYTES,
* @size is in bytes instead. @size is taken directly as the new
* size. Depending on the file format, the hypervisor may round up
* to the next alignment boundary.
*
* The @disk parameter is either an unambiguous source name of the
* block device (the <source file='...'/> sub-element, such as
* "/path/to/image"), or (since 0.9.5) the device target shorthand
* (the <target dev='...'/> sub-element, such as "vda"). Valid names
* can be found by calling virDomainGetXMLDesc() and inspecting
* elements within //domain/devices/disk.
*
* Note that this call may fail if the underlying virtualization hypervisor
* does not support it; this call requires privileged access to the
* hypervisor.
*
* Returns: 0 in case of success or -1 in case of failure.
*/
int
virDomainBlockResize(virDomainPtr dom,
const char *disk,
unsigned long long size,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "disk=%s, size=%llu, flags=%x", disk, size, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
conn = dom->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(disk, error);
if (conn->driver->domainBlockResize) {
int ret;
ret = conn->driver->domainBlockResize(dom, disk, size, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainMemoryPeek:
* @dom: pointer to the domain object
* @start: start of memory to peek
* @size: size of memory to peek
* @buffer: return buffer (must be at least size bytes)
* @flags: bitwise-OR of virDomainMemoryFlags
*
* This function allows you to read the contents of a domain's
* memory.
*
* The memory which is read is controlled by the 'start', 'size'
* and 'flags' parameters.
*
* If 'flags' is VIR_MEMORY_VIRTUAL then the 'start' and 'size'
* parameters are interpreted as virtual memory addresses for
* whichever task happens to be running on the domain at the
* moment. Although this sounds haphazard it is in fact what
* you want in order to read Linux kernel state, because it
* ensures that pointers in the kernel image can be interpreted
* coherently.
*
* 'buffer' is the return buffer and must be at least 'size' bytes.
* 'size' may be 0 to test if the call would succeed.
*
* NB. The remote driver imposes a 64K byte limit on 'size'.
* For your program to be able to work reliably over a remote
* connection you should split large requests to <= 65536 bytes.
* However, with 0.9.13 this RPC limit has been raised to 1M byte.
* Starting with version 1.0.6 the RPC limit has been raised again.
* Now large requests up to 16M byte are supported.
*
* Returns: 0 in case of success or -1 in case of failure.
*/
int
virDomainMemoryPeek(virDomainPtr dom,
unsigned long long start /* really 64 bits */,
size_t size,
void *buffer,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "start=%lld, size=%zi, buffer=%p, flags=%x",
start, size, buffer, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
conn = dom->conn;
virCheckReadOnlyGoto(conn->flags, error);
/* Note on access to physical memory: A VIR_MEMORY_PHYSICAL flag is
* a possibility. However it isn't really useful unless the caller
* can also access registers, particularly CR3 on x86 in order to
* get the Page Table Directory. Since registers are different on
* every architecture, that would imply another call to get the
* machine registers.
*
* The QEMU driver handles VIR_MEMORY_VIRTUAL, mapping it
* to the qemu 'memsave' command which does the virtual to physical
* mapping inside qemu.
*
* The QEMU driver also handles VIR_MEMORY_PHYSICAL, mapping it
* to the qemu 'pmemsave' command.
*
* At time of writing there is no Xen driver. However the Xen
* hypervisor only lets you map physical pages from other domains,
* and so the Xen driver would have to do the virtual to physical
* mapping by chasing 2, 3 or 4-level page tables from the PTD.
* There is example code in libxc (xc_translate_foreign_address)
* which does this, although we cannot copy this code directly
* because of incompatible licensing.
*/
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_MEMORY_VIRTUAL, VIR_MEMORY_PHYSICAL, error);
/* Allow size == 0 as an access test. */
if (size > 0)
virCheckNonNullArgGoto(buffer, error);
if (conn->driver->domainMemoryPeek) {
int ret;
ret = conn->driver->domainMemoryPeek(dom, start, size,
buffer, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainGetBlockInfo:
* @domain: a domain object
* @disk: path to the block device, or device shorthand
* @info: pointer to a virDomainBlockInfo structure allocated by the user
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Extract information about a domain's block device.
*
* The @disk parameter is either an unambiguous source name of the
* block device (the <source file='...'/> sub-element, such as
* "/path/to/image"), or (since 0.9.5) the device target shorthand
* (the <target dev='...'/> sub-element, such as "vda"). Valid names
* can be found by calling virDomainGetXMLDesc() and inspecting
* elements within //domain/devices/disk.
*
* For QEMU domains, the allocation and physical virDomainBlockInfo
* values returned will generally be the same, except when using a
* non raw, block backing device, such as qcow2 for an active domain.
* When the persistent domain is not active, QEMU will return the
* default which is the same value for allocation and physical.
*
* Active QEMU domains can return an allocation value which is more
* representative of the currently used blocks by the device compared
* to the physical size of the device. Applications can use/monitor
* the allocation value with the understanding that if the domain
* becomes inactive during an attempt to get the value, the default
* values will be returned. Thus, the application should check
* after the call for the domain being inactive if the values are
* the same. Optionally, the application could be watching for a
* shutdown event and then ignore any values received afterwards.
* This can be an issue when a domain is being migrated and the
* exact timing of the domain being made inactive and check of
* the allocation value results the default being returned. For
* a transient domain in the similar situation, this call will return
* -1 and an error message indicating the "domain is not running".
*
* The following is some pseudo code illustrating the call sequence:
*
* ...
* virDomainPtr dom;
* virDomainBlockInfo info;
* char *device;
* ...
* // Either get a list of all domains or a specific domain
* // via a virDomainLookupBy*() call.
* //
* // It's also required to fill in the device pointer, but that's
* // specific to the implementation. For the purposes of this example
* // a qcow2 backed device name string would need to be provided.
* ...
* // If the following call is made on a persistent domain with a
* // qcow2 block backed block device, then it's possible the returned
* // allocation equals the physical value. In that case, the domain
* // that may have been active prior to calling has become inactive,
* // such as is the case during a domain migration. Thus once we
* // get data returned, check for active domain when the values are
* // the same.
* if (virDomainGetBlockInfo(dom, device, &info, 0) < 0)
* goto failure;
* if (info.allocation == info.physical) {
* // If the domain is no longer active,
* // then the defaults are being returned.
* if (!virDomainIsActive())
* goto ignore_return;
* }
* // Do something with the allocation and physical values
* ...
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainGetBlockInfo(virDomainPtr domain, const char *disk,
virDomainBlockInfoPtr info, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "info=%p, flags=%x", info, flags);
virResetLastError();
if (info)
memset(info, 0, sizeof(*info));
virCheckDomainReturn(domain, -1);
virCheckNonEmptyStringArgGoto(disk, error);
virCheckNonNullArgGoto(info, error);
conn = domain->conn;
if (conn->driver->domainGetBlockInfo) {
int ret;
ret = conn->driver->domainGetBlockInfo(domain, disk, info, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainDefineXML:
* @conn: pointer to the hypervisor connection
* @xml: the XML description for the domain, preferably in UTF-8
*
* Define a domain, but does not start it.
* This definition is persistent, until explicitly undefined with
* virDomainUndefine(). A previous definition for this domain would be
* overridden if it already exists.
*
* Some hypervisors may prevent this operation if there is a current
* block copy operation on a transient domain with the same id as the
* domain being defined; in that case, use virDomainBlockJobAbort() to
* stop the block copy first.
*
* virDomainFree should be used to free the resources after the
* domain object is no longer needed.
*
* Returns NULL in case of error, a pointer to the domain otherwise
*/
virDomainPtr
virDomainDefineXML(virConnectPtr conn, const char *xml)
{
VIR_DEBUG("conn=%p, xml=%s", conn, NULLSTR(xml));
virResetLastError();
virCheckConnectReturn(conn, NULL);
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(xml, error);
if (conn->driver->domainDefineXML) {
virDomainPtr ret;
ret = conn->driver->domainDefineXML(conn, xml);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return NULL;
}
/**
* virDomainDefineXMLFlags:
* @conn: pointer to the hypervisor connection
* @xml: the XML description for the domain, preferably in UTF-8
* @flags: bitwise OR of the virDomainDefineFlags constants
*
* Defines a domain, but does not start it.
* This definition is persistent, until explicitly undefined with
* virDomainUndefine(). A previous definition for this domain would be
* overridden if it already exists.
*
* Some hypervisors may prevent this operation if there is a current
* block copy operation on a transient domain with the same id as the
* domain being defined; in that case, use virDomainBlockJobAbort() to
* stop the block copy first.
*
* virDomainFree should be used to free the resources after the
* domain object is no longer needed.
*
* Returns NULL in case of error, a pointer to the domain otherwise
*/
virDomainPtr
virDomainDefineXMLFlags(virConnectPtr conn, const char *xml, unsigned int flags)
{
VIR_DEBUG("conn=%p, xml=%s flags=%x", conn, NULLSTR(xml), flags);
virResetLastError();
virCheckConnectReturn(conn, NULL);
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(xml, error);
if (conn->driver->domainDefineXMLFlags) {
virDomainPtr ret;
ret = conn->driver->domainDefineXMLFlags(conn, xml, flags);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return NULL;
}
/**
* virDomainUndefine:
* @domain: pointer to a defined domain
*
* Undefine a domain. If the domain is running, it's converted to
* transient domain, without stopping it. If the domain is inactive,
* the domain configuration is removed.
*
* If the domain has a managed save image (see
* virDomainHasManagedSaveImage()), or if it is inactive and has any
* snapshot metadata (see virDomainSnapshotNum()), then the undefine will
* fail. See virDomainUndefineFlags() for more control.
*
* Returns 0 in case of success, -1 in case of error
*/
int
virDomainUndefine(virDomainPtr domain)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainUndefine) {
int ret;
ret = conn->driver->domainUndefine(domain);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainUndefineFlags:
* @domain: pointer to a defined domain
* @flags: bitwise-OR of supported virDomainUndefineFlagsValues
*
* Undefine a domain. If the domain is running, it's converted to
* transient domain, without stopping it. If the domain is inactive,
* the domain configuration is removed.
*
* If the domain has a managed save image (see virDomainHasManagedSaveImage()),
* then including VIR_DOMAIN_UNDEFINE_MANAGED_SAVE in @flags will also remove
* that file, and omitting the flag will cause the undefine process to fail.
*
* If the domain is inactive and has any snapshot metadata (see
* virDomainSnapshotNum()), then including
* VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA in @flags will also remove
* that metadata. Omitting the flag will cause the undefine of an
* inactive domain to fail. Active snapshots will retain snapshot
* metadata until the (now-transient) domain halts, regardless of
* whether this flag is present. On hypervisors where snapshots do
* not use libvirt metadata, this flag has no effect.
*
* If the domain has any nvram specified, the undefine process will fail
* unless VIR_DOMAIN_UNDEFINE_KEEP_NVRAM is specified, or if
* VIR_DOMAIN_UNDEFINE_NVRAM is specified to remove the nvram file.
*
* Returns 0 in case of success, -1 in case of error
*/
int
virDomainUndefineFlags(virDomainPtr domain,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainUndefineFlags) {
int ret;
ret = conn->driver->domainUndefineFlags(domain, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virConnectNumOfDefinedDomains:
* @conn: pointer to the hypervisor connection
*
* Provides the number of defined but inactive domains.
*
* Returns the number of domain found or -1 in case of error
*/
int
virConnectNumOfDefinedDomains(virConnectPtr conn)
{
VIR_DEBUG("conn=%p", conn);
virResetLastError();
virCheckConnectReturn(conn, -1);
if (conn->driver->connectNumOfDefinedDomains) {
int ret;
ret = conn->driver->connectNumOfDefinedDomains(conn);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virConnectListDefinedDomains:
* @conn: pointer to the hypervisor connection
* @names: pointer to an array to store the names
* @maxnames: size of the array
*
* list the defined but inactive domains, stores the pointers to the names
* in @names
*
* For active domains, see virConnectListDomains(). For more control over
* the results, see virConnectListAllDomains().
*
* Returns the number of names provided in the array or -1 in case of error.
* Note that this command is inherently racy; a domain can be defined between
* a call to virConnectNumOfDefinedDomains() and this call; you are only
* guaranteed that all currently defined domains were listed if the return
* is less than @maxids. The client must call free() on each returned name.
*/
int
virConnectListDefinedDomains(virConnectPtr conn, char **const names,
int maxnames)
{
VIR_DEBUG("conn=%p, names=%p, maxnames=%d", conn, names, maxnames);
virResetLastError();
virCheckConnectReturn(conn, -1);
virCheckNonNullArgGoto(names, error);
virCheckNonNegativeArgGoto(maxnames, error);
if (conn->driver->connectListDefinedDomains) {
int ret;
ret = conn->driver->connectListDefinedDomains(conn, names, maxnames);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virConnectListAllDomains:
* @conn: Pointer to the hypervisor connection.
* @domains: Pointer to a variable to store the array containing domain objects
* or NULL if the list is not required (just returns number of guests).
* @flags: bitwise-OR of virConnectListAllDomainsFlags
*
* Collect a possibly-filtered list of all domains, and return an allocated
* array of information for each. This API solves the race inherent in
* virConnectListDomains() and virConnectListDefinedDomains().
*
* Normally, all domains are returned; however, @flags can be used to
* filter the results for a smaller list of targeted domains. The valid
* flags are divided into groups, where each group contains bits that
* describe mutually exclusive attributes of a domain, and where all bits
* within a group describe all possible domains. Some hypervisors might
* reject explicit bits from a group where the hypervisor cannot make a
* distinction (for example, not all hypervisors can tell whether domains
* have snapshots). For a group supported by a given hypervisor, the
* behavior when no bits of a group are set is identical to the behavior
* when all bits in that group are set. When setting bits from more than
* one group, it is possible to select an impossible combination (such
* as an inactive transient domain), in that case a hypervisor may return
* either 0 or an error.
*
* The first group of @flags is VIR_CONNECT_LIST_DOMAINS_ACTIVE (online
* domains) and VIR_CONNECT_LIST_DOMAINS_INACTIVE (offline domains).
*
* The next group of @flags is VIR_CONNECT_LIST_DOMAINS_PERSISTENT (defined
* domains) and VIR_CONNECT_LIST_DOMAINS_TRANSIENT (running but not defined).
*
* The next group of @flags covers various domain states:
* VIR_CONNECT_LIST_DOMAINS_RUNNING, VIR_CONNECT_LIST_DOMAINS_PAUSED,
* VIR_CONNECT_LIST_DOMAINS_SHUTOFF, and a catch-all for all other states
* (such as crashed, this catch-all covers the possibility of adding new
* states).
*
* The remaining groups cover boolean attributes commonly asked about
* domains; they include VIR_CONNECT_LIST_DOMAINS_MANAGEDSAVE and
* VIR_CONNECT_LIST_DOMAINS_NO_MANAGEDSAVE, for filtering based on whether
* a managed save image exists; VIR_CONNECT_LIST_DOMAINS_AUTOSTART and
* VIR_CONNECT_LIST_DOMAINS_NO_AUTOSTART, for filtering based on autostart;
* VIR_CONNECT_LIST_DOMAINS_HAS_SNAPSHOT and
* VIR_CONNECT_LIST_DOMAINS_NO_SNAPSHOT, for filtering based on whether
* a domain has snapshots.
*
* Example of usage:
*
* virDomainPtr *domains;
* size_t i;
* int ret;
* unsigned int flags = VIR_CONNECT_LIST_DOMAINS_RUNNING |
* VIR_CONNECT_LIST_DOMAINS_PERSISTENT;
* ret = virConnectListAllDomains(conn, &domains, flags);
* if (ret < 0)
* error();
* for (i = 0; i < ret; i++) {
* do_something_with_domain(domains[i]);
* //here or in a separate loop if needed
* virDomainFree(domains[i]);
* }
* free(domains);
*
* Returns the number of domains found or -1 and sets domains to NULL in case of
* error. On success, the array stored into @domains is guaranteed to have an
* extra allocated element set to NULL but not included in the return count, to
* make iteration easier. The caller is responsible for calling virDomainFree()
* on each array element, then calling free() on @domains.
*/
int
virConnectListAllDomains(virConnectPtr conn,
virDomainPtr **domains,
unsigned int flags)
{
VIR_DEBUG("conn=%p, domains=%p, flags=%x", conn, domains, flags);
virResetLastError();
if (domains)
*domains = NULL;
virCheckConnectReturn(conn, -1);
if (conn->driver->connectListAllDomains) {
int ret;
ret = conn->driver->connectListAllDomains(conn, domains, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainCreate:
* @domain: pointer to a defined domain
*
* Launch a defined domain. If the call succeeds the domain moves from the
* defined to the running domains pools. The domain will be paused only
* if restoring from managed state created from a paused domain. For more
* control, see virDomainCreateWithFlags().
*
* Returns 0 in case of success, -1 in case of error
*/
int
virDomainCreate(virDomainPtr domain)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainCreate) {
int ret;
ret = conn->driver->domainCreate(domain);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainCreateWithFlags:
* @domain: pointer to a defined domain
* @flags: bitwise-OR of supported virDomainCreateFlags
*
* Launch a defined domain. If the call succeeds the domain moves from the
* defined to the running domains pools.
*
* If the VIR_DOMAIN_START_PAUSED flag is set, or if the guest domain
* has a managed save image that requested paused state (see
* virDomainManagedSave()) the guest domain will be started, but its
* CPUs will remain paused. The CPUs can later be manually started
* using virDomainResume(). In all other cases, the guest domain will
* be running.
*
* If the VIR_DOMAIN_START_AUTODESTROY flag is set, the guest
* domain will be automatically destroyed when the virConnectPtr
* object is finally released. This will also happen if the
* client application crashes / loses its connection to the
* libvirtd daemon. Any domains marked for auto destroy will
* block attempts at migration, save-to-file, or snapshots.
*
* If the VIR_DOMAIN_START_BYPASS_CACHE flag is set, and there is a
* managed save file for this domain (created by virDomainManagedSave()),
* then libvirt will attempt to bypass the file system cache while restoring
* the file, or fail if it cannot do so for the given system; this can allow
* less pressure on file system cache, but also risks slowing loads from NFS.
*
* If the VIR_DOMAIN_START_FORCE_BOOT flag is set, then any managed save
* file for this domain is discarded, and the domain boots from scratch.
*
* Returns 0 in case of success, -1 in case of error
*/
int
virDomainCreateWithFlags(virDomainPtr domain, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainCreateWithFlags) {
int ret;
ret = conn->driver->domainCreateWithFlags(domain, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainCreateWithFiles:
* @domain: pointer to a defined domain
* @nfiles: number of file descriptors passed
* @files: list of file descriptors passed
* @flags: bitwise-OR of supported virDomainCreateFlags
*
* Launch a defined domain. If the call succeeds the domain moves from the
* defined to the running domains pools.
*
* @files provides an array of file descriptors which will be
* made available to the 'init' process of the guest. The file
* handles exposed to the guest will be renumbered to start
* from 3 (ie immediately following stderr). This is only
* supported for guests which use container based virtualization
* technology.
*
* If the VIR_DOMAIN_START_PAUSED flag is set, or if the guest domain
* has a managed save image that requested paused state (see
* virDomainManagedSave()) the guest domain will be started, but its
* CPUs will remain paused. The CPUs can later be manually started
* using virDomainResume(). In all other cases, the guest domain will
* be running.
*
* If the VIR_DOMAIN_START_AUTODESTROY flag is set, the guest
* domain will be automatically destroyed when the virConnectPtr
* object is finally released. This will also happen if the
* client application crashes / loses its connection to the
* libvirtd daemon. Any domains marked for auto destroy will
* block attempts at migration, save-to-file, or snapshots.
*
* If the VIR_DOMAIN_START_BYPASS_CACHE flag is set, and there is a
* managed save file for this domain (created by virDomainManagedSave()),
* then libvirt will attempt to bypass the file system cache while restoring
* the file, or fail if it cannot do so for the given system; this can allow
* less pressure on file system cache, but also risks slowing loads from NFS.
*
* If the VIR_DOMAIN_START_FORCE_BOOT flag is set, then any managed save
* file for this domain is discarded, and the domain boots from scratch.
*
* Returns 0 in case of success, -1 in case of error
*/
int
virDomainCreateWithFiles(virDomainPtr domain, unsigned int nfiles,
int *files, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "nfiles=%u, files=%p, flags=%x",
nfiles, files, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainCreateWithFiles) {
int ret;
ret = conn->driver->domainCreateWithFiles(domain,
nfiles, files,
flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetAutostart:
* @domain: a domain object
* @autostart: the value returned
*
* Provides a boolean value indicating whether the domain
* configured to be automatically started when the host
* machine boots.
*
* Returns -1 in case of error, 0 in case of success
*/
int
virDomainGetAutostart(virDomainPtr domain,
int *autostart)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "autostart=%p", autostart);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(autostart, error);
conn = domain->conn;
if (conn->driver->domainGetAutostart) {
int ret;
ret = conn->driver->domainGetAutostart(domain, autostart);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSetAutostart:
* @domain: a domain object
* @autostart: whether the domain should be automatically started 0 or 1
*
* Configure the domain to be automatically started
* when the host machine boots.
*
* Returns -1 in case of error, 0 in case of success
*/
int
virDomainSetAutostart(virDomainPtr domain,
int autostart)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "autostart=%d", autostart);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainSetAutostart) {
int ret;
ret = conn->driver->domainSetAutostart(domain, autostart);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainInjectNMI:
* @domain: pointer to domain object, or NULL for Domain0
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Send NMI to the guest
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virDomainInjectNMI(virDomainPtr domain, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainInjectNMI) {
int ret;
ret = conn->driver->domainInjectNMI(domain, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSendKey:
* @domain: pointer to domain object, or NULL for Domain0
* @codeset: the code set of keycodes, from virKeycodeSet
* @holdtime: the duration (in milliseconds) that the keys will be held
* @keycodes: array of keycodes
* @nkeycodes: number of keycodes, up to VIR_DOMAIN_SEND_KEY_MAX_KEYS
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Send key(s) to the guest.
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virDomainSendKey(virDomainPtr domain,
unsigned int codeset,
unsigned int holdtime,
unsigned int *keycodes,
int nkeycodes,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "codeset=%u, holdtime=%u, nkeycodes=%u, flags=%x",
codeset, holdtime, nkeycodes, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(keycodes, error);
virCheckPositiveArgGoto(nkeycodes, error);
if (nkeycodes > VIR_DOMAIN_SEND_KEY_MAX_KEYS) {
virReportInvalidArg(nkeycodes,
_("nkeycodes must be <= %d"),
VIR_DOMAIN_SEND_KEY_MAX_KEYS);
goto error;
}
if (conn->driver->domainSendKey) {
int ret;
ret = conn->driver->domainSendKey(domain, codeset, holdtime,
keycodes, nkeycodes, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSendProcessSignal:
* @domain: pointer to domain object
* @pid_value: a positive integer process ID, or negative integer process group ID
* @signum: a signal from the virDomainProcessSignal enum
* @flags: currently unused, pass 0
*
* Send a signal to the designated process in the guest
*
* The signal numbers must be taken from the virDomainProcessSignal
* enum. These will be translated to the corresponding signal
* number for the guest OS, by the guest agent delivering the
* signal. If there is no mapping from virDomainProcessSignal to
* the native OS signals, this API will report an error.
*
* If @pid_value is an integer greater than zero, it is
* treated as a process ID. If @pid_value is an integer
* less than zero, it is treated as a process group ID.
* All the @pid_value numbers are from the container/guest
* namespace. The value zero is not valid.
*
* Not all hypervisors will support sending signals to
* arbitrary processes or process groups. If this API is
* implemented the minimum requirement is to be able to
* use @pid_value == 1 (i.e. kill init). No other value is
* required to be supported.
*
* If the @signum is VIR_DOMAIN_PROCESS_SIGNAL_NOP then this
* API will simply report whether the process is running in
* the container/guest.
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virDomainSendProcessSignal(virDomainPtr domain,
long long pid_value,
unsigned int signum,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "pid=%lld, signum=%u flags=%x",
pid_value, signum, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckNonZeroArgGoto(pid_value, error);
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainSendProcessSignal) {
int ret;
ret = conn->driver->domainSendProcessSignal(domain,
pid_value,
signum,
flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSetVcpus:
* @domain: pointer to domain object, or NULL for Domain0
* @nvcpus: the new number of virtual CPUs for this domain
*
* Dynamically change the number of virtual CPUs used by the domain.
* Note that this call may fail if the underlying virtualization hypervisor
* does not support it or if growing the number is arbitrarily limited.
* This function may require privileged access to the hypervisor.
*
* Note that if this call is executed before the guest has finished booting,
* the guest may fail to process the change.
*
* This command only changes the runtime configuration of the domain,
* so can only be called on an active domain. It is hypervisor-dependent
* whether it also affects persistent configuration; for more control,
* use virDomainSetVcpusFlags().
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virDomainSetVcpus(virDomainPtr domain, unsigned int nvcpus)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "nvcpus=%u", nvcpus);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonZeroArgGoto(nvcpus, error);
if (conn->driver->domainSetVcpus) {
int ret;
ret = conn->driver->domainSetVcpus(domain, nvcpus);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSetVcpusFlags:
* @domain: pointer to domain object, or NULL for Domain0
* @nvcpus: the new number of virtual CPUs for this domain, must be at least 1
* @flags: bitwise-OR of virDomainVcpuFlags
*
* Dynamically change the number of virtual CPUs used by the domain.
* Note that this call may fail if the underlying virtualization hypervisor
* does not support it or if growing the number is arbitrarily limited.
* This function may require privileged access to the hypervisor.
*
* @flags may include VIR_DOMAIN_AFFECT_LIVE to affect a running
* domain (which may fail if domain is not active), or
* VIR_DOMAIN_AFFECT_CONFIG to affect the next boot via the XML
* description of the domain. Both flags may be set.
* If neither flag is specified (that is, @flags is VIR_DOMAIN_AFFECT_CURRENT),
* then an inactive domain modifies persistent setup, while an active domain
* is hypervisor-dependent on whether just live or both live and persistent
* state is changed.
*
* Note that if this call is executed before the guest has finished booting,
* the guest may fail to process the change.
*
* If @flags includes VIR_DOMAIN_VCPU_MAXIMUM, then
* VIR_DOMAIN_AFFECT_LIVE must be clear, and only the maximum virtual
* CPU limit is altered; generally, this value must be less than or
* equal to virConnectGetMaxVcpus(). Otherwise, this call affects the
* current virtual CPU limit, which must be less than or equal to the
* maximum limit. Note that hypervisors may not allow changing the maximum
* vcpu count if processor topology is specified.
*
* If @flags includes VIR_DOMAIN_VCPU_GUEST, then the state of processors is
* modified inside the guest instead of the hypervisor. This flag can only
* be used with live guests and is incompatible with VIR_DOMAIN_VCPU_MAXIMUM.
* The usage of this flag may require a guest agent configured.
*
* Not all hypervisors can support all flag combinations.
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virDomainSetVcpusFlags(virDomainPtr domain, unsigned int nvcpus,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "nvcpus=%u, flags=%x", nvcpus, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckReadOnlyGoto(domain->conn->flags, error);
VIR_REQUIRE_FLAG_GOTO(VIR_DOMAIN_VCPU_MAXIMUM,
VIR_DOMAIN_AFFECT_CONFIG,
error);
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_VCPU_GUEST,
VIR_DOMAIN_AFFECT_CONFIG,
error);
virCheckNonZeroArgGoto(nvcpus, error);
conn = domain->conn;
if (conn->driver->domainSetVcpusFlags) {
int ret;
ret = conn->driver->domainSetVcpusFlags(domain, nvcpus, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetVcpusFlags:
* @domain: pointer to domain object, or NULL for Domain0
* @flags: bitwise-OR of virDomainVcpuFlags
*
* Query the number of virtual CPUs used by the domain. Note that
* this call may fail if the underlying virtualization hypervisor does
* not support it. This function may require privileged access to the
* hypervisor.
*
* If @flags includes VIR_DOMAIN_AFFECT_LIVE, this will query a
* running domain (which will fail if domain is not active); if
* it includes VIR_DOMAIN_AFFECT_CONFIG, this will query the XML
* description of the domain. It is an error to set both flags.
* If neither flag is set (that is, VIR_DOMAIN_AFFECT_CURRENT),
* then the configuration queried depends on whether the domain
* is currently running.
*
* If @flags includes VIR_DOMAIN_VCPU_MAXIMUM, then the maximum
* virtual CPU limit is queried. Otherwise, this call queries the
* current virtual CPU count.
*
* If @flags includes VIR_DOMAIN_VCPU_GUEST, then the state of the processors
* is queried in the guest instead of the hypervisor. This flag is only usable
* on live domains. Guest agent may be needed for this flag to be available.
*
* Returns the number of vCPUs in case of success, -1 in case of failure.
*/
int
virDomainGetVcpusFlags(virDomainPtr domain, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
if (flags & VIR_DOMAIN_VCPU_GUEST)
virCheckReadOnlyGoto(conn->flags, error);
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
VIR_DOMAIN_AFFECT_CONFIG,
error);
if (conn->driver->domainGetVcpusFlags) {
int ret;
ret = conn->driver->domainGetVcpusFlags(domain, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainPinVcpu:
* @domain: pointer to domain object, or NULL for Domain0
* @vcpu: virtual CPU number
* @cpumap: pointer to a bit map of real CPUs (in 8-bit bytes) (IN)
* Each bit set to 1 means that corresponding CPU is usable.
* Bytes are stored in little-endian order: CPU0-7, 8-15...
* In each byte, lowest CPU number is least significant bit.
* @maplen: number of bytes in cpumap, from 1 up to size of CPU map in
* underlying virtualization system (Xen...).
* If maplen < size, missing bytes are set to zero.
* If maplen > size, failure code is returned.
*
* Dynamically change the real CPUs which can be allocated to a virtual CPU.
* This function may require privileged access to the hypervisor.
*
* This command only changes the runtime configuration of the domain,
* so can only be called on an active domain.
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virDomainPinVcpu(virDomainPtr domain, unsigned int vcpu,
unsigned char *cpumap, int maplen)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "vcpu=%u, cpumap=%p, maplen=%d",
vcpu, cpumap, maplen);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(cpumap, error);
virCheckPositiveArgGoto(maplen, error);
if (conn->driver->domainPinVcpu) {
int ret;
ret = conn->driver->domainPinVcpu(domain, vcpu, cpumap, maplen);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainPinVcpuFlags:
* @domain: pointer to domain object, or NULL for Domain0
* @vcpu: virtual CPU number
* @cpumap: pointer to a bit map of real CPUs (in 8-bit bytes) (IN)
* Each bit set to 1 means that corresponding CPU is usable.
* Bytes are stored in little-endian order: CPU0-7, 8-15...
* In each byte, lowest CPU number is least significant bit.
* @maplen: number of bytes in cpumap, from 1 up to size of CPU map in
* underlying virtualization system (Xen...).
* If maplen < size, missing bytes are set to zero.
* If maplen > size, failure code is returned.
* @flags: bitwise-OR of virDomainModificationImpact
*
* Dynamically change the real CPUs which can be allocated to a virtual CPU.
* This function may require privileged access to the hypervisor.
*
* @flags may include VIR_DOMAIN_AFFECT_LIVE or VIR_DOMAIN_AFFECT_CONFIG.
* Both flags may be set.
* If VIR_DOMAIN_AFFECT_LIVE is set, the change affects a running domain
* and may fail if domain is not alive.
* If VIR_DOMAIN_AFFECT_CONFIG is set, the change affects persistent state,
* and will fail for transient domains. If neither flag is specified (that is,
* @flags is VIR_DOMAIN_AFFECT_CURRENT), then an inactive domain modifies
* persistent setup, while an active domain is hypervisor-dependent on whether
* just live or both live and persistent state is changed.
* Not all hypervisors can support all flag combinations.
*
* See also virDomainGetVcpuPinInfo for querying this information.
*
* Returns 0 in case of success, -1 in case of failure.
*
*/
int
virDomainPinVcpuFlags(virDomainPtr domain, unsigned int vcpu,
unsigned char *cpumap, int maplen, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "vcpu=%u, cpumap=%p, maplen=%d, flags=%x",
vcpu, cpumap, maplen, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(cpumap, error);
virCheckPositiveArgGoto(maplen, error);
if (conn->driver->domainPinVcpuFlags) {
int ret;
ret = conn->driver->domainPinVcpuFlags(domain, vcpu, cpumap, maplen, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetVcpuPinInfo:
* @domain: pointer to domain object, or NULL for Domain0
* @ncpumaps: the number of cpumap (listed first to match virDomainGetVcpus)
* @cpumaps: pointer to a bit map of real CPUs for all vcpus of this
* domain (in 8-bit bytes) (OUT)
* It's assumed there is <ncpumaps> cpumap in cpumaps array.
* The memory allocated to cpumaps must be (ncpumaps * maplen) bytes
* (ie: calloc(ncpumaps, maplen)).
* One cpumap inside cpumaps has the format described in
* virDomainPinVcpu() API.
* Must not be NULL.
* @maplen: the number of bytes in one cpumap, from 1 up to size of CPU map.
* Must be positive.
* @flags: bitwise-OR of virDomainModificationImpact
* Must not be VIR_DOMAIN_AFFECT_LIVE and
* VIR_DOMAIN_AFFECT_CONFIG concurrently.
*
* Query the CPU affinity setting of all virtual CPUs of domain, store it
* in cpumaps.
*
* Returns the number of virtual CPUs in case of success,
* -1 in case of failure.
*/
int
virDomainGetVcpuPinInfo(virDomainPtr domain, int ncpumaps,
unsigned char *cpumaps, int maplen, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "ncpumaps=%d, cpumaps=%p, maplen=%d, flags=%x",
ncpumaps, cpumaps, maplen, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckNonNullArgGoto(cpumaps, error);
virCheckPositiveArgGoto(ncpumaps, error);
virCheckPositiveArgGoto(maplen, error);
if (INT_MULTIPLY_OVERFLOW(ncpumaps, maplen)) {
virReportError(VIR_ERR_OVERFLOW, _("input too large: %d * %d"),
ncpumaps, maplen);
goto error;
}
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
VIR_DOMAIN_AFFECT_CONFIG,
error);
if (conn->driver->domainGetVcpuPinInfo) {
int ret;
ret = conn->driver->domainGetVcpuPinInfo(domain, ncpumaps,
cpumaps, maplen, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainPinEmulator:
* @domain: pointer to domain object, or NULL for Domain0
* @cpumap: pointer to a bit map of real CPUs (in 8-bit bytes) (IN)
* Each bit set to 1 means that corresponding CPU is usable.
* Bytes are stored in little-endian order: CPU0-7, 8-15...
* In each byte, lowest CPU number is least significant bit.
* @maplen: number of bytes in cpumap, from 1 up to size of CPU map in
* underlying virtualization system (Xen...).
* If maplen < size, missing bytes are set to zero.
* If maplen > size, failure code is returned.
* @flags: bitwise-OR of virDomainModificationImpact
*
* Dynamically change the real CPUs which can be allocated to all emulator
* threads. This function may require privileged access to the hypervisor.
*
* @flags may include VIR_DOMAIN_AFFECT_LIVE or VIR_DOMAIN_AFFECT_CONFIG.
* Both flags may be set.
* If VIR_DOMAIN_AFFECT_LIVE is set, the change affects a running domain
* and may fail if domain is not alive.
* If VIR_DOMAIN_AFFECT_CONFIG is set, the change affects persistent state,
* and will fail for transient domains. If neither flag is specified (that is,
* @flags is VIR_DOMAIN_AFFECT_CURRENT), then an inactive domain modifies
* persistent setup, while an active domain is hypervisor-dependent on whether
* just live or both live and persistent state is changed.
* Not all hypervisors can support all flag combinations.
*
* See also virDomainGetEmulatorPinInfo for querying this information.
*
* Returns 0 in case of success, -1 in case of failure.
*
*/
int
virDomainPinEmulator(virDomainPtr domain, unsigned char *cpumap,
int maplen, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "cpumap=%p, maplen=%d, flags=%x",
cpumap, maplen, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(cpumap, error);
virCheckPositiveArgGoto(maplen, error);
if (conn->driver->domainPinEmulator) {
int ret;
ret = conn->driver->domainPinEmulator(domain, cpumap, maplen, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetEmulatorPinInfo:
* @domain: pointer to domain object, or NULL for Domain0
* @cpumap: pointer to a bit map of real CPUs for all emulator threads of
* this domain (in 8-bit bytes) (OUT)
* There is only one cpumap for all emulator threads.
* Must not be NULL.
* @maplen: the number of bytes in one cpumap, from 1 up to size of CPU map.
* Must be positive.
* @flags: bitwise-OR of virDomainModificationImpact
* Must not be VIR_DOMAIN_AFFECT_LIVE and
* VIR_DOMAIN_AFFECT_CONFIG concurrently.
*
* Query the CPU affinity setting of all emulator threads of domain, store
* it in cpumap.
*
* Returns 1 in case of success,
* 0 in case of no emulator threads are pined to pcpus,
* -1 in case of failure.
*/
int
virDomainGetEmulatorPinInfo(virDomainPtr domain, unsigned char *cpumap,
int maplen, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "cpumap=%p, maplen=%d, flags=%x",
cpumap, maplen, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(cpumap, error);
virCheckPositiveArgGoto(maplen, error);
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
VIR_DOMAIN_AFFECT_CONFIG,
error);
conn = domain->conn;
if (conn->driver->domainGetEmulatorPinInfo) {
int ret;
ret = conn->driver->domainGetEmulatorPinInfo(domain, cpumap,
maplen, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetVcpus:
* @domain: pointer to domain object, or NULL for Domain0
* @info: pointer to an array of virVcpuInfo structures (OUT)
* @maxinfo: number of structures in info array
* @cpumaps: pointer to a bit map of real CPUs for all vcpus of this
* domain (in 8-bit bytes) (OUT)
* If cpumaps is NULL, then no cpumap information is returned by the API.
* It's assumed there is <maxinfo> cpumap in cpumaps array.
* The memory allocated to cpumaps must be (maxinfo * maplen) bytes
* (ie: calloc(maxinfo, maplen)).
* One cpumap inside cpumaps has the format described in
* virDomainPinVcpu() API.
* @maplen: number of bytes in one cpumap, from 1 up to size of CPU map in
* underlying virtualization system (Xen...).
* Must be zero when cpumaps is NULL and positive when it is non-NULL.
*
* Extract information about virtual CPUs of domain, store it in info array
* and also in cpumaps if this pointer isn't NULL. This call may fail
* on an inactive domain.
*
* See also virDomainGetVcpuPinInfo for querying just cpumaps, including on
* an inactive domain.
*
* Returns the number of info filled in case of success, -1 in case of failure.
*/
int
virDomainGetVcpus(virDomainPtr domain, virVcpuInfoPtr info, int maxinfo,
unsigned char *cpumaps, int maplen)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "info=%p, maxinfo=%d, cpumaps=%p, maplen=%d",
info, maxinfo, cpumaps, maplen);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(info, error);
virCheckPositiveArgGoto(maxinfo, error);
/* Ensure that domainGetVcpus (aka remoteDomainGetVcpus) does not
try to memcpy anything into a NULL pointer. */
if (cpumaps)
virCheckPositiveArgGoto(maplen, error);
else
virCheckZeroArgGoto(maplen, error);
if (cpumaps && INT_MULTIPLY_OVERFLOW(maxinfo, maplen)) {
virReportError(VIR_ERR_OVERFLOW, _("input too large: %d * %d"),
maxinfo, maplen);
goto error;
}
conn = domain->conn;
if (conn->driver->domainGetVcpus) {
int ret;
ret = conn->driver->domainGetVcpus(domain, info, maxinfo,
cpumaps, maplen);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetMaxVcpus:
* @domain: pointer to domain object
*
* Provides the maximum number of virtual CPUs supported for
* the guest VM. If the guest is inactive, this is basically
* the same as virConnectGetMaxVcpus(). If the guest is running
* this will reflect the maximum number of virtual CPUs the
* guest was booted with. For more details, see virDomainGetVcpusFlags().
*
* Returns the maximum of virtual CPU or -1 in case of error.
*/
int
virDomainGetMaxVcpus(virDomainPtr domain)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
if (conn->driver->domainGetMaxVcpus) {
int ret;
ret = conn->driver->domainGetMaxVcpus(domain);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetIOThreadInfo:
* @dom: a domain object
* @info: pointer to an array of virDomainIOThreadInfo structures (OUT)
* @flags: bitwise-OR of virDomainModificationImpact
* Must not be VIR_DOMAIN_AFFECT_LIVE and
* VIR_DOMAIN_AFFECT_CONFIG concurrently.
*
* Fetch IOThreads of an active domain including the cpumap information to
* determine on which CPU the IOThread has affinity to run.
*
* Returns the number of IOThreads or -1 in case of error.
* On success, the array of information is stored into @info. The caller is
* responsible for calling virDomainIOThreadInfoFree() on each array element,
* then calling free() on @info. On error, @info is set to NULL.
*/
int
virDomainGetIOThreadInfo(virDomainPtr dom,
virDomainIOThreadInfoPtr **info,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(dom, "info=%p flags=%x", info, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
virCheckNonNullArgGoto(info, error);
*info = NULL;
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
VIR_DOMAIN_AFFECT_CONFIG,
error);
if (dom->conn->driver->domainGetIOThreadInfo) {
int ret;
ret = dom->conn->driver->domainGetIOThreadInfo(dom, info, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainIOThreadInfoFree:
* @info: pointer to a virDomainIOThreadInfo object
*
* Frees the memory used by @info.
*/
void
virDomainIOThreadInfoFree(virDomainIOThreadInfoPtr info)
{
if (!info)
return;
VIR_FREE(info->cpumap);
VIR_FREE(info);
}
/**
* virDomainPinIOThread:
* @domain: a domain object
* @iothread_id: the IOThread ID to set the CPU affinity
* @cpumap: pointer to a bit map of real CPUs (in 8-bit bytes) (IN)
* Each bit set to 1 means that corresponding CPU is usable.
* Bytes are stored in little-endian order: CPU0-7, 8-15...
* In each byte, lowest CPU number is least significant bit.
* @maplen: number of bytes in cpumap, from 1 up to size of CPU map in
* underlying virtualization system (Xen...).
* If maplen < size, missing bytes are set to zero.
* If maplen > size, failure code is returned.
* @flags: bitwise-OR of virDomainModificationImpact
*
* Dynamically change the real CPUs which can be allocated to an IOThread.
* This function may require privileged access to the hypervisor.
*
* @flags may include VIR_DOMAIN_AFFECT_LIVE or VIR_DOMAIN_AFFECT_CONFIG.
* Both flags may be set.
* If VIR_DOMAIN_AFFECT_LIVE is set, the change affects a running domain
* and may fail if domain is not alive.
* If VIR_DOMAIN_AFFECT_CONFIG is set, the change affects persistent state,
* and will fail for transient domains. If neither flag is specified (that is,
* @flags is VIR_DOMAIN_AFFECT_CURRENT), then an inactive domain modifies
* persistent setup, while an active domain is hypervisor-dependent on whether
* just live or both live and persistent state is changed.
* Not all hypervisors can support all flag combinations.
*
* See also virDomainGetIOThreadInfo for querying this information.
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virDomainPinIOThread(virDomainPtr domain,
unsigned int iothread_id,
unsigned char *cpumap,
int maplen,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "iothread_id=%u, cpumap=%p, maplen=%d",
iothread_id, cpumap, maplen);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(cpumap, error);
virCheckPositiveArgGoto(maplen, error);
if (conn->driver->domainPinIOThread) {
int ret;
ret = conn->driver->domainPinIOThread(domain, iothread_id,
cpumap, maplen, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainAddIOThread:
* @domain: a domain object
* @iothread_id: the specific IOThread ID value to add
* @flags: bitwise-OR of virDomainModificationImpact
*
* Dynamically add an IOThread to the domain. It is left up to the
* underlying virtual hypervisor to determine the valid range for an
* @iothread_id and determining whether the @iothread_id already exists.
*
* Note that this call can fail if the underlying virtualization hypervisor
* does not support it or if growing the number is arbitrarily limited.
* This function requires privileged access to the hypervisor.
*
* @flags may include VIR_DOMAIN_AFFECT_LIVE or VIR_DOMAIN_AFFECT_CONFIG.
* Both flags may be set.
* If VIR_DOMAIN_AFFECT_LIVE is set, the change affects a running domain
* and may fail if domain is not alive.
* If VIR_DOMAIN_AFFECT_CONFIG is set, the change affects persistent state,
* and will fail for transient domains. If neither flag is specified (that is,
* @flags is VIR_DOMAIN_AFFECT_CURRENT), then an inactive domain modifies
* persistent setup, while an active domain is hypervisor-dependent on whether
* just live or both live and persistent state is changed.
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virDomainAddIOThread(virDomainPtr domain,
unsigned int iothread_id,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "iothread_id=%u, flags=%x",
iothread_id, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckReadOnlyGoto(domain->conn->flags, error);
conn = domain->conn;
if (conn->driver->domainAddIOThread) {
int ret;
ret = conn->driver->domainAddIOThread(domain, iothread_id, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainDelIOThread:
* @domain: a domain object
* @iothread_id: the specific IOThread ID value to delete
* @flags: bitwise-OR of virDomainModificationImpact
*
* Dynamically delete an IOThread from the domain. The @iothread_id to be
* deleted must not have a resource associated with it and can be any of
* the currently valid IOThread ID's.
*
* Note that this call can fail if the underlying virtualization hypervisor
* does not support it or if reducing the number is arbitrarily limited.
* This function requires privileged access to the hypervisor.
*
* @flags may include VIR_DOMAIN_AFFECT_LIVE or VIR_DOMAIN_AFFECT_CONFIG.
* Both flags may be set.
* If VIR_DOMAIN_AFFECT_LIVE is set, the change affects a running domain
* and may fail if domain is not alive.
* If VIR_DOMAIN_AFFECT_CONFIG is set, the change affects persistent state,
* and will fail for transient domains. If neither flag is specified (that is,
* @flags is VIR_DOMAIN_AFFECT_CURRENT), then an inactive domain modifies
* persistent setup, while an active domain is hypervisor-dependent on whether
* just live or both live and persistent state is changed.
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virDomainDelIOThread(virDomainPtr domain,
unsigned int iothread_id,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "iothread_id=%u, flags=%x", iothread_id, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckReadOnlyGoto(domain->conn->flags, error);
virCheckNonZeroArgGoto(iothread_id, error);
conn = domain->conn;
if (conn->driver->domainDelIOThread) {
int ret;
ret = conn->driver->domainDelIOThread(domain, iothread_id, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetSecurityLabel:
* @domain: a domain object
* @seclabel: pointer to a virSecurityLabel structure
*
* Extract security label of an active domain. The 'label' field
* in the @seclabel argument will be initialized to the empty
* string if the domain is not running under a security model.
*
* Returns 0 in case of success, -1 in case of failure
*/
int
virDomainGetSecurityLabel(virDomainPtr domain, virSecurityLabelPtr seclabel)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "seclabel=%p", seclabel);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckNonNullArgGoto(seclabel, error);
if (conn->driver->domainGetSecurityLabel) {
int ret;
ret = conn->driver->domainGetSecurityLabel(domain, seclabel);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetSecurityLabelList:
* @domain: a domain object
* @seclabels: will be auto-allocated and filled with domains' security labels.
* Caller must free memory on return.
*
* Extract the security labels of an active domain. The 'label' field
* in the @seclabels argument will be initialized to the empty
* string if the domain is not running under a security model.
*
* Returns number of elemnets in @seclabels on success, -1 in case of failure.
*/
int
virDomainGetSecurityLabelList(virDomainPtr domain,
virSecurityLabelPtr* seclabels)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "seclabels=%p", seclabels);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(seclabels, error);
conn = domain->conn;
if (conn->driver->domainGetSecurityLabelList) {
int ret;
ret = conn->driver->domainGetSecurityLabelList(domain, seclabels);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSetMetadata:
* @domain: a domain object
* @type: type of metadata, from virDomainMetadataType
* @metadata: new metadata text
* @key: XML namespace key, or NULL
* @uri: XML namespace URI, or NULL
* @flags: bitwise-OR of virDomainModificationImpact
*
* Sets the appropriate domain element given by @type to the
* value of @metadata. A @type of VIR_DOMAIN_METADATA_DESCRIPTION
* is free-form text; VIR_DOMAIN_METADATA_TITLE is free-form, but no
* newlines are permitted, and should be short (although the length is
* not enforced). For these two options @key and @uri are irrelevant and
* must be set to NULL.
*
* For type VIR_DOMAIN_METADATA_ELEMENT @metadata must be well-formed
* XML belonging to namespace defined by @uri with local name @key.
*
* Passing NULL for @metadata says to remove that element from the
* domain XML (passing the empty string leaves the element present).
*
* The resulting metadata will be present in virDomainGetXMLDesc(),
* as well as quick access through virDomainGetMetadata().
*
* @flags controls whether the live domain, persistent configuration,
* or both will be modified.
*
* Returns 0 on success, -1 in case of failure.
*/
int
virDomainSetMetadata(virDomainPtr domain,
int type,
const char *metadata,
const char *key,
const char *uri,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain,
"type=%d, metadata='%s', key='%s', uri='%s', flags=%x",
type, NULLSTR(metadata), NULLSTR(key), NULLSTR(uri),
flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
switch (type) {
case VIR_DOMAIN_METADATA_TITLE:
if (metadata && strchr(metadata, '\n')) {
virReportInvalidArg(metadata, "%s",
_("metadata title can't contain "
"newlines"));
goto error;
}
/* fallthrough */
case VIR_DOMAIN_METADATA_DESCRIPTION:
virCheckNullArgGoto(uri, error);
virCheckNullArgGoto(key, error);
break;
case VIR_DOMAIN_METADATA_ELEMENT:
virCheckNonNullArgGoto(uri, error);
if (metadata)
virCheckNonNullArgGoto(key, error);
break;
default:
/* For future expansion */
break;
}
if (conn->driver->domainSetMetadata) {
int ret;
ret = conn->driver->domainSetMetadata(domain, type, metadata, key, uri,
flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetMetadata:
* @domain: a domain object
* @type: type of metadata, from virDomainMetadataType
* @uri: XML namespace identifier
* @flags: bitwise-OR of virDomainModificationImpact
*
* Retrieves the appropriate domain element given by @type.
* If VIR_DOMAIN_METADATA_ELEMENT is requested parameter @uri
* must be set to the name of the namespace the requested elements
* belong to, otherwise must be NULL.
*
* If an element of the domain XML is not present, the resulting
* error will be VIR_ERR_NO_DOMAIN_METADATA. This method forms
* a shortcut for seeing information from virDomainSetMetadata()
* without having to go through virDomainGetXMLDesc().
*
* @flags controls whether the live domain or persistent
* configuration will be queried.
*
* Returns the metadata string on success (caller must free),
* or NULL in case of failure.
*/
char *
virDomainGetMetadata(virDomainPtr domain,
int type,
const char *uri,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "type=%d, uri='%s', flags=%x",
type, NULLSTR(uri), flags);
virResetLastError();
virCheckDomainReturn(domain, NULL);
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
VIR_DOMAIN_AFFECT_CONFIG,
error);
switch (type) {
case VIR_DOMAIN_METADATA_TITLE:
case VIR_DOMAIN_METADATA_DESCRIPTION:
virCheckNullArgGoto(uri, error);
break;
case VIR_DOMAIN_METADATA_ELEMENT:
virCheckNonNullArgGoto(uri, error);
break;
default:
/* For future expansion */
break;
}
conn = domain->conn;
if (conn->driver->domainGetMetadata) {
char *ret;
if (!(ret = conn->driver->domainGetMetadata(domain, type, uri, flags)))
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return NULL;
}
/**
* virDomainAttachDevice:
* @domain: pointer to domain object
* @xml: pointer to XML description of one device
*
* Create a virtual device attachment to backend. This function,
* having hotplug semantics, is only allowed on an active domain.
*
* For compatibility, this method can also be used to change the media
* in an existing CDROM/Floppy device, however, applications are
* recommended to use the virDomainUpdateDeviceFlag method instead.
*
* Be aware that hotplug changes might not persist across a domain going
* into S4 state (also known as hibernation) unless you also modify the
* persistent domain definition.
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virDomainAttachDevice(virDomainPtr domain, const char *xml)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "xml=%s", xml);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckNonNullArgGoto(xml, error);
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainAttachDevice) {
int ret;
ret = conn->driver->domainAttachDevice(domain, xml);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainAttachDeviceFlags:
* @domain: pointer to domain object
* @xml: pointer to XML description of one device
* @flags: bitwise-OR of virDomainDeviceModifyFlags
*
* Attach a virtual device to a domain, using the flags parameter
* to control how the device is attached. VIR_DOMAIN_AFFECT_CURRENT
* specifies that the device allocation is made based on current domain
* state. VIR_DOMAIN_AFFECT_LIVE specifies that the device shall be
* allocated to the active domain instance only and is not added to the
* persisted domain configuration. VIR_DOMAIN_AFFECT_CONFIG
* specifies that the device shall be allocated to the persisted domain
* configuration only. Note that the target hypervisor must return an
* error if unable to satisfy flags. E.g. the hypervisor driver will
* return failure if LIVE is specified but it only supports modifying the
* persisted device allocation.
*
* For compatibility, this method can also be used to change the media
* in an existing CDROM/Floppy device, however, applications are
* recommended to use the virDomainUpdateDeviceFlag method instead.
*
* Be aware that hotplug changes might not persist across a domain going
* into S4 state (also known as hibernation) unless you also modify the
* persistent domain definition.
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virDomainAttachDeviceFlags(virDomainPtr domain,
const char *xml, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "xml=%s, flags=%x", xml, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckNonNullArgGoto(xml, error);
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainAttachDeviceFlags) {
int ret;
ret = conn->driver->domainAttachDeviceFlags(domain, xml, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainDetachDevice:
* @domain: pointer to domain object
* @xml: pointer to XML description of one device
*
* This is an equivalent of virDomainDetachDeviceFlags() when called with
* @flags parameter set to VIR_DOMAIN_AFFECT_LIVE.
*
* See virDomainDetachDeviceFlags() for more details.
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virDomainDetachDevice(virDomainPtr domain, const char *xml)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "xml=%s", xml);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckNonNullArgGoto(xml, error);
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainDetachDevice) {
int ret;
ret = conn->driver->domainDetachDevice(domain, xml);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainDetachDeviceFlags:
* @domain: pointer to domain object
* @xml: pointer to XML description of one device
* @flags: bitwise-OR of virDomainDeviceModifyFlags
*
* Detach a virtual device from a domain, using the flags parameter
* to control how the device is detached. VIR_DOMAIN_AFFECT_CURRENT
* specifies that the device allocation is removed based on current domain
* state. VIR_DOMAIN_AFFECT_LIVE specifies that the device shall be
* deallocated from the active domain instance only and is not from the
* persisted domain configuration. VIR_DOMAIN_AFFECT_CONFIG
* specifies that the device shall be deallocated from the persisted domain
* configuration only. Note that the target hypervisor must return an
* error if unable to satisfy flags. E.g. the hypervisor driver will
* return failure if LIVE is specified but it only supports removing the
* persisted device allocation.
*
* Some hypervisors may prevent this operation if there is a current
* block copy operation on the device being detached; in that case,
* use virDomainBlockJobAbort() to stop the block copy first.
*
* Beware that depending on the hypervisor and device type, detaching a device
* from a running domain may be asynchronous. That is, calling
* virDomainDetachDeviceFlags may just request device removal while the device
* is actually removed later (in cooperation with a guest OS). Previously,
* this fact was ignored and the device could have been removed from domain
* configuration before it was actually removed by the hypervisor causing
* various failures on subsequent operations. To check whether the device was
* successfully removed, either recheck domain configuration using
* virDomainGetXMLDesc() or add a handler for the VIR_DOMAIN_EVENT_ID_DEVICE_REMOVED
* event. In case the device is already gone when virDomainDetachDeviceFlags
* returns, the event is delivered before this API call ends. To help existing
* clients work better in most cases, this API will try to transform an
* asynchronous device removal that finishes shortly after the request into
* a synchronous removal. In other words, this API may wait a bit for the
* removal to complete in case it was not synchronous.
*
* Be aware that hotplug changes might not persist across a domain going
* into S4 state (also known as hibernation) unless you also modify the
* persistent domain definition.
*
* The supplied XML description of the device should be as specific
* as its definition in the domain XML. The set of attributes used
* to match the device are internal to the drivers. Using a partial definition,
* or attempting to detach a device that is not present in the domain XML,
* but shares some specific attributes with one that is present,
* may lead to unexpected results.
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virDomainDetachDeviceFlags(virDomainPtr domain,
const char *xml, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "xml=%s, flags=%x", xml, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckNonNullArgGoto(xml, error);
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainDetachDeviceFlags) {
int ret;
ret = conn->driver->domainDetachDeviceFlags(domain, xml, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainUpdateDeviceFlags:
* @domain: pointer to domain object
* @xml: pointer to XML description of one device
* @flags: bitwise-OR of virDomainDeviceModifyFlags
*
* Change a virtual device on a domain, using the flags parameter
* to control how the device is changed. VIR_DOMAIN_AFFECT_CURRENT
* specifies that the device change is made based on current domain
* state. VIR_DOMAIN_AFFECT_LIVE specifies that the device shall be
* changed on the active domain instance only and is not added to the
* persisted domain configuration. VIR_DOMAIN_AFFECT_CONFIG
* specifies that the device shall be changed on the persisted domain
* configuration only. Note that the target hypervisor must return an
* error if unable to satisfy flags. E.g. the hypervisor driver will
* return failure if LIVE is specified but it only supports modifying the
* persisted device allocation.
*
* This method is used for actions such changing CDROM/Floppy device
* media, altering the graphics configuration such as password,
* reconfiguring the NIC device backend connectivity, etc.
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virDomainUpdateDeviceFlags(virDomainPtr domain,
const char *xml, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "xml=%s, flags=%x", xml, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckNonNullArgGoto(xml, error);
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainUpdateDeviceFlags) {
int ret;
ret = conn->driver->domainUpdateDeviceFlags(domain, xml, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virConnectDomainEventRegister:
* @conn: pointer to the connection
* @cb: callback to the function handling domain events
* @opaque: opaque data to pass on to the callback
* @freecb: optional function to deallocate opaque when not used anymore
*
* Adds a callback to receive notifications of domain lifecycle events
* occurring on a connection. This function requires that an event loop
* has been previously registered with virEventRegisterImpl() or
* virEventRegisterDefaultImpl().
*
* Use of this method is no longer recommended. Instead applications
* should try virConnectDomainEventRegisterAny() which has a more flexible
* API contract.
*
* The virDomainPtr object handle passed into the callback upon delivery
* of an event is only valid for the duration of execution of the callback.
* If the callback wishes to keep the domain object after the callback returns,
* it shall take a reference to it, by calling virDomainRef.
* The reference can be released once the object is no longer required
* by calling virDomainFree.
*
* Returns 0 on success, -1 on failure. Older versions of some hypervisors
* sometimes returned a positive number on success, but without any reliable
* semantics on what that number represents.
*/
int
virConnectDomainEventRegister(virConnectPtr conn,
virConnectDomainEventCallback cb,
void *opaque,
virFreeCallback freecb)
{
VIR_DEBUG("conn=%p, cb=%p, opaque=%p, freecb=%p", conn, cb, opaque, freecb);
virResetLastError();
virCheckConnectReturn(conn, -1);
virCheckNonNullArgGoto(cb, error);
if (conn->driver && conn->driver->connectDomainEventRegister) {
int ret;
ret = conn->driver->connectDomainEventRegister(conn, cb, opaque, freecb);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virConnectDomainEventDeregister:
* @conn: pointer to the connection
* @cb: callback to the function handling domain events
*
* Removes a callback previously registered with the
* virConnectDomainEventRegister() function.
*
* Use of this method is no longer recommended. Instead applications
* should try virConnectDomainEventDeregisterAny() which has a more flexible
* API contract
*
* Returns 0 on success, -1 on failure. Older versions of some hypervisors
* sometimes returned a positive number on success, but without any reliable
* semantics on what that number represents.
*/
int
virConnectDomainEventDeregister(virConnectPtr conn,
virConnectDomainEventCallback cb)
{
VIR_DEBUG("conn=%p, cb=%p", conn, cb);
virResetLastError();
virCheckConnectReturn(conn, -1);
virCheckNonNullArgGoto(cb, error);
if (conn->driver && conn->driver->connectDomainEventDeregister) {
int ret;
ret = conn->driver->connectDomainEventDeregister(conn, cb);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainIsActive:
* @dom: pointer to the domain object
*
* Determine if the domain is currently running
*
* Returns 1 if running, 0 if inactive, -1 on error
*/
int
virDomainIsActive(virDomainPtr dom)
{
VIR_DEBUG("dom=%p", dom);
virResetLastError();
virCheckDomainReturn(dom, -1);
if (dom->conn->driver->domainIsActive) {
int ret;
ret = dom->conn->driver->domainIsActive(dom);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainIsPersistent:
* @dom: pointer to the domain object
*
* Determine if the domain has a persistent configuration
* which means it will still exist after shutting down
*
* Returns 1 if persistent, 0 if transient, -1 on error
*/
int
virDomainIsPersistent(virDomainPtr dom)
{
VIR_DOMAIN_DEBUG(dom);
virResetLastError();
virCheckDomainReturn(dom, -1);
if (dom->conn->driver->domainIsPersistent) {
int ret;
ret = dom->conn->driver->domainIsPersistent(dom);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainRename:
* @dom: pointer to the domain object
* @new_name: new domain name
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Rename a domain. New domain name is specified in the second
* argument. Depending on each driver implementation it may be
* required that domain is in a specific state.
*
* There might be some attributes and/or elements in domain XML that if no
* value provided at XML defining time, libvirt will derive their value from
* the domain name. These are not updated by this API. Users are strongly
* advised to change these after the rename was successful.
*
* Returns 0 if successfully renamed, -1 on error
*/
int
virDomainRename(virDomainPtr dom,
const char *new_name,
unsigned int flags)
{
VIR_DEBUG("dom=%p, new_name=%s", dom, NULLSTR(new_name));
virResetLastError();
virCheckDomainReturn(dom, -1);
virCheckNonEmptyStringArgGoto(new_name, error);
virCheckReadOnlyGoto(dom->conn->flags, error);
if (dom->conn->driver->domainRename) {
int ret = dom->conn->driver->domainRename(dom, new_name, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainIsUpdated:
* @dom: pointer to the domain object
*
* Determine if the domain has been updated.
*
* Returns 1 if updated, 0 if not, -1 on error
*/
int
virDomainIsUpdated(virDomainPtr dom)
{
VIR_DOMAIN_DEBUG(dom);
virResetLastError();
virCheckDomainReturn(dom, -1);
if (dom->conn->driver->domainIsUpdated) {
int ret;
ret = dom->conn->driver->domainIsUpdated(dom);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainGetJobInfo:
* @domain: a domain object
* @info: pointer to a virDomainJobInfo structure allocated by the user
*
* Extract information about progress of a background job on a domain.
* Will return an error if the domain is not active.
*
* This function returns a limited amount of information in comparison
* to virDomainGetJobStats().
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainGetJobInfo(virDomainPtr domain, virDomainJobInfoPtr info)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "info=%p", info);
virResetLastError();
if (info)
memset(info, 0, sizeof(*info));
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(info, error);
conn = domain->conn;
if (conn->driver->domainGetJobInfo) {
int ret;
ret = conn->driver->domainGetJobInfo(domain, info);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetJobStats:
* @domain: a domain object
* @type: where to store the job type (one of virDomainJobType)
* @params: where to store job statistics
* @nparams: number of items in @params
* @flags: bitwise-OR of virDomainGetJobStatsFlags
*
* Extract information about progress of a background job on a domain.
* Will return an error if the domain is not active. The function returns
* a superset of progress information provided by virDomainGetJobInfo.
* Possible fields returned in @params are defined by VIR_DOMAIN_JOB_*
* macros and new fields will likely be introduced in the future so callers
* may receive fields that they do not understand in case they talk to a
* newer server.
*
* When @flags contains VIR_DOMAIN_JOB_STATS_COMPLETED, the function will
* return statistics about a recently completed job. Specifically, this
* flag may be used to query statistics of a completed incoming pre-copy
* migration (statistics for post-copy migration are only available on the
* source hsot). Statistics of a completed job are automatically destroyed
* once read or when libvirtd is restarted. Note that time information
* returned for completed migrations may be completely irrelevant unless both
* source and destination hosts have synchronized time (i.e., NTP daemon is
* running on both of them). The statistics of a completed job can also be
* obtained by listening to a VIR_DOMAIN_EVENT_ID_JOB_COMPLETED event (on the
* source host in case of a migration job).
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainGetJobStats(virDomainPtr domain,
int *type,
virTypedParameterPtr *params,
int *nparams,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "type=%p, params=%p, nparams=%p, flags=%x",
type, params, nparams, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(type, error);
virCheckNonNullArgGoto(params, error);
virCheckNonNullArgGoto(nparams, error);
conn = domain->conn;
if (conn->driver->domainGetJobStats) {
int ret;
ret = conn->driver->domainGetJobStats(domain, type, params,
nparams, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainAbortJob:
* @domain: a domain object
*
* Requests that the current background job be aborted at the
* soonest opportunity. In case the job is a migration in a post-copy mode,
* virDomainAbortJob will report an error (see virDomainMigrateStartPostCopy
* for more details).
*
* Returns 0 in case of success and -1 in case of failure.
*/
int
virDomainAbortJob(virDomainPtr domain)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainAbortJob) {
int ret;
ret = conn->driver->domainAbortJob(domain);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainMigrateSetMaxDowntime:
* @domain: a domain object
* @downtime: maximum tolerable downtime for live migration, in milliseconds
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Sets maximum tolerable time for which the domain is allowed to be paused
* at the end of live migration. It's supposed to be called while the domain is
* being live-migrated as a reaction to migration progress.
*
* Returns 0 in case of success, -1 otherwise.
*/
int
virDomainMigrateSetMaxDowntime(virDomainPtr domain,
unsigned long long downtime,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "downtime=%llu, flags=%x", downtime, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainMigrateSetMaxDowntime) {
if (conn->driver->domainMigrateSetMaxDowntime(domain, downtime, flags) < 0)
goto error;
return 0;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainMigrateGetCompressionCache:
* @domain: a domain object
* @cacheSize: return value of current size of the cache (in bytes)
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Gets current size of the cache (in bytes) used for compressing repeatedly
* transferred memory pages during live migration.
*
* Returns 0 in case of success, -1 otherwise.
*/
int
virDomainMigrateGetCompressionCache(virDomainPtr domain,
unsigned long long *cacheSize,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "cacheSize=%p, flags=%x", cacheSize, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckNonNullArgGoto(cacheSize, error);
if (conn->driver->domainMigrateGetCompressionCache) {
if (conn->driver->domainMigrateGetCompressionCache(domain, cacheSize,
flags) < 0)
goto error;
return 0;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainMigrateSetCompressionCache:
* @domain: a domain object
* @cacheSize: size of the cache (in bytes) used for compression
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Sets size of the cache (in bytes) used for compressing repeatedly
* transferred memory pages during live migration. It's supposed to be called
* while the domain is being live-migrated as a reaction to migration progress
* and increasing number of compression cache misses obtained from
* virDomainGetJobStats.
*
* Returns 0 in case of success, -1 otherwise.
*/
int
virDomainMigrateSetCompressionCache(virDomainPtr domain,
unsigned long long cacheSize,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "cacheSize=%llu, flags=%x", cacheSize, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainMigrateSetCompressionCache) {
if (conn->driver->domainMigrateSetCompressionCache(domain, cacheSize,
flags) < 0)
goto error;
return 0;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainMigrateSetMaxSpeed:
* @domain: a domain object
* @bandwidth: migration bandwidth limit in MiB/s
* @flags: extra flags; not used yet, so callers should always pass 0
*
* The maximum bandwidth (in MiB/s) that will be used to do migration
* can be specified with the bandwidth parameter. Not all hypervisors
* will support a bandwidth cap
*
* Returns 0 in case of success, -1 otherwise.
*/
int
virDomainMigrateSetMaxSpeed(virDomainPtr domain,
unsigned long bandwidth,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "bandwidth=%lu, flags=%x", bandwidth, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainMigrateSetMaxSpeed) {
if (conn->driver->domainMigrateSetMaxSpeed(domain, bandwidth, flags) < 0)
goto error;
return 0;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainMigrateGetMaxSpeed:
* @domain: a domain object
* @bandwidth: return value of current migration bandwidth limit in MiB/s
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Get the current maximum bandwidth (in MiB/s) that will be used if the
* domain is migrated. Not all hypervisors will support a bandwidth limit.
*
* Returns 0 in case of success, -1 otherwise.
*/
int
virDomainMigrateGetMaxSpeed(virDomainPtr domain,
unsigned long *bandwidth,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "bandwidth = %p, flags=%x", bandwidth, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckNonNullArgGoto(bandwidth, error);
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainMigrateGetMaxSpeed) {
if (conn->driver->domainMigrateGetMaxSpeed(domain, bandwidth, flags) < 0)
goto error;
return 0;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainMigrateStartPostCopy:
* @domain: a domain object
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Starts post-copy migration. This function has to be called while
* migration (initiated with VIR_MIGRATE_POSTCOPY flag) is in progress.
*
* Traditional pre-copy migration iteratively walks through guest memory
* pages and migrates those that changed since the previous iteration. The
* iterative phase stops when the number of dirty pages is low enough so that
* the virtual CPUs can be paused, all dirty pages transferred to the
* destination, where the virtual CPUs are unpaused, and all this can happen
* within a predefined downtime period. It's clear that this process may never
* converge if downtime is too short and/or the guest keeps changing a lot of
* memory pages.
*
* When migration is switched to post-copy mode, the virtual CPUs are paused
* immediately, only a minimum set of pages is transferred, and the CPUs are
* unpaused on destination. The source keeps sending all remaining memory pages
* to the destination while the guest is already running there. Whenever the
* guest tries to read a memory page which has not been migrated yet, the
* hypervisor has to tell the source to transfer that page in a priority
* channel. To minimize such page faults, it is a good idea to run at least one
* iteration of pre-copy migration before switching to post-copy.
*
* Post-copy migration is guaranteed to converge since each page is transferred
* at most once no matter how fast it changes. On the other hand once the
* guest is running on the destination host, the migration can no longer be
* rolled back because none of the hosts has complete state. If this happens,
* libvirt will leave the domain paused on both hosts with
* VIR_DOMAIN_PAUSED_POSTCOPY_FAILED reason. It's up to the upper layer to
* decide what to do in such case. Because of this, libvirt will refuse to
* cancel post-copy migration via virDomainAbortJob.
*
* The following domain life cycle events are emitted during post-copy
* migration:
* VIR_DOMAIN_EVENT_SUSPENDED_POSTCOPY (on the source) -- migration entered
* post-copy mode.
* VIR_DOMAIN_EVENT_RESUMED_POSTCOPY (on the destination) -- the guest is
* running on the destination host while some of its memory pages still
* remain on the source host; neither the source nor the destination host
* contain a complete guest state from this point until migration
* finishes.
* VIR_DOMAIN_EVENT_RESUMED_MIGRATED (on the destination),
* VIR_DOMAIN_EVENT_STOPPED_MIGRATED (on the source) -- migration finished
* successfully and the destination host holds a complete guest state.
* VIR_DOMAIN_EVENT_SUSPENDED_POSTCOPY_FAILED (on the destination) -- emitted
* when migration fails in post-copy mode and it's unclear whether any
* of the hosts has a complete guest state.
*
* The progress of a post-copy migration can be monitored normally using
* virDomainGetJobStats on the source host. Fetching statistics of a completed
* post-copy migration can also be done on the source host (by calling
* virDomainGetJobStats or listening to VIR_DOMAIN_EVENT_ID_JOB_COMPLETED
* event, but (in contrast to pre-copy migration) the statistics are not
* available on the destination host. Thus, VIR_DOMAIN_EVENT_ID_JOB_COMPLETED
* event is the only way of getting statistics of a completed post-copy
* migration of a transient domain (because the domain is removed after
* migration and there's no domain to run virDomainGetJobStats on).
*
* Returns 0 in case of success, -1 otherwise.
*/
int
virDomainMigrateStartPostCopy(virDomainPtr domain,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainMigrateStartPostCopy) {
if (conn->driver->domainMigrateStartPostCopy(domain, flags) < 0)
goto error;
return 0;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virConnectDomainEventRegisterAny:
* @conn: pointer to the connection
* @dom: pointer to the domain
* @eventID: the event type to receive
* @cb: callback to the function handling domain events
* @opaque: opaque data to pass on to the callback
* @freecb: optional function to deallocate opaque when not used anymore
*
* Adds a callback to receive notifications of arbitrary domain events
* occurring on a domain. This function requires that an event loop
* has been previously registered with virEventRegisterImpl() or
* virEventRegisterDefaultImpl().
*
* If @dom is NULL, then events will be monitored for any domain. If @dom
* is non-NULL, then only the specific domain will be monitored.
*
* Most types of event have a callback providing a custom set of parameters
* for the event. When registering an event, it is thus necessary to use
* the VIR_DOMAIN_EVENT_CALLBACK() macro to cast the supplied function pointer
* to match the signature of this method.
*
* The virDomainPtr object handle passed into the callback upon delivery
* of an event is only valid for the duration of execution of the callback.
* If the callback wishes to keep the domain object after the callback returns,
* it shall take a reference to it, by calling virDomainRef().
* The reference can be released once the object is no longer required
* by calling virDomainFree().
*
* The return value from this method is a positive integer identifier
* for the callback. To unregister a callback, this callback ID should
* be passed to the virConnectDomainEventDeregisterAny() method.
*
* Returns a callback identifier on success, -1 on failure.
*/
int
virConnectDomainEventRegisterAny(virConnectPtr conn,
virDomainPtr dom,
int eventID,
virConnectDomainEventGenericCallback cb,
void *opaque,
virFreeCallback freecb)
{
VIR_DOMAIN_DEBUG(dom, "conn=%p, eventID=%d, cb=%p, opaque=%p, freecb=%p",
conn, eventID, cb, opaque, freecb);
virResetLastError();
virCheckConnectReturn(conn, -1);
if (dom) {
virCheckDomainGoto(dom, error);
if (dom->conn != conn) {
virReportInvalidArg(dom,
_("domain '%s' must match connection"),
dom->name);
goto error;
}
}
virCheckNonNullArgGoto(cb, error);
virCheckNonNegativeArgGoto(eventID, error);
if (eventID >= VIR_DOMAIN_EVENT_ID_LAST) {
virReportInvalidArg(eventID,
_("eventID must be less than %d"),
VIR_DOMAIN_EVENT_ID_LAST);
goto error;
}
if (conn->driver && conn->driver->connectDomainEventRegisterAny) {
int ret;
ret = conn->driver->connectDomainEventRegisterAny(conn, dom, eventID, cb, opaque, freecb);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virConnectDomainEventDeregisterAny:
* @conn: pointer to the connection
* @callbackID: the callback identifier
*
* Removes an event callback. The callbackID parameter should be the
* value obtained from a previous virConnectDomainEventRegisterAny() method.
*
* Returns 0 on success, -1 on failure. Older versions of some hypervisors
* sometimes returned a positive number on success, but without any reliable
* semantics on what that number represents. */
int
virConnectDomainEventDeregisterAny(virConnectPtr conn,
int callbackID)
{
VIR_DEBUG("conn=%p, callbackID=%d", conn, callbackID);
virResetLastError();
virCheckConnectReturn(conn, -1);
virCheckNonNegativeArgGoto(callbackID, error);
if (conn->driver && conn->driver->connectDomainEventDeregisterAny) {
int ret;
ret = conn->driver->connectDomainEventDeregisterAny(conn, callbackID);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainManagedSave:
* @dom: pointer to the domain
* @flags: bitwise-OR of virDomainSaveRestoreFlags
*
* This method will suspend a domain and save its memory contents to
* a file on disk. After the call, if successful, the domain is not
* listed as running anymore.
* The difference from virDomainSave() is that libvirt is keeping track of
* the saved state itself, and will reuse it once the domain is being
* restarted (automatically or via an explicit libvirt call).
* As a result any running domain is sure to not have a managed saved image.
* This also implies that managed save only works on persistent domains,
* since the domain must still exist in order to use virDomainCreate() to
* restart it.
*
* If @flags includes VIR_DOMAIN_SAVE_BYPASS_CACHE, then libvirt will
* attempt to bypass the file system cache while creating the file, or
* fail if it cannot do so for the given system; this can allow less
* pressure on file system cache, but also risks slowing saves to NFS.
*
* Normally, the managed saved state will remember whether the domain
* was running or paused, and start will resume to the same state.
* Specifying VIR_DOMAIN_SAVE_RUNNING or VIR_DOMAIN_SAVE_PAUSED in
* @flags will override the default saved into the file. These two
* flags are mutually exclusive.
*
* Returns 0 in case of success or -1 in case of failure
*/
int
virDomainManagedSave(virDomainPtr dom, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "flags=%x", flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
conn = dom->conn;
virCheckReadOnlyGoto(conn->flags, error);
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_SAVE_RUNNING,
VIR_DOMAIN_SAVE_PAUSED,
error);
if (conn->driver->domainManagedSave) {
int ret;
ret = conn->driver->domainManagedSave(dom, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainHasManagedSaveImage:
* @dom: pointer to the domain
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Check if a domain has a managed save image as created by
* virDomainManagedSave(). Note that any running domain should not have
* such an image, as it should have been removed on restart.
*
* Returns 0 if no image is present, 1 if an image is present, and
* -1 in case of error
*/
int
virDomainHasManagedSaveImage(virDomainPtr dom, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "flags=%x", flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
conn = dom->conn;
if (conn->driver->domainHasManagedSaveImage) {
int ret;
ret = conn->driver->domainHasManagedSaveImage(dom, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainManagedSaveRemove:
* @dom: pointer to the domain
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Remove any managed save image for this domain.
*
* Returns 0 in case of success, and -1 in case of error
*/
int
virDomainManagedSaveRemove(virDomainPtr dom, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "flags=%x", flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
conn = dom->conn;
virCheckReadOnlyGoto(conn->flags, error);
if (conn->driver->domainManagedSaveRemove) {
int ret;
ret = conn->driver->domainManagedSaveRemove(dom, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainOpenConsole:
* @dom: a domain object
* @dev_name: the console, serial or parallel port device alias, or NULL
* @st: a stream to associate with the console
* @flags: bitwise-OR of virDomainConsoleFlags
*
* This opens the backend associated with a console, serial or
* parallel port device on a guest, if the backend is supported.
* If the @dev_name is omitted, then the first console or serial
* device is opened. The console is associated with the passed
* in @st stream, which should have been opened in non-blocking
* mode for bi-directional I/O.
*
* By default, when @flags is 0, the open will fail if libvirt
* detects that the console is already in use by another client;
* passing VIR_DOMAIN_CONSOLE_FORCE will cause libvirt to forcefully
* remove the other client prior to opening this console.
*
* If flag VIR_DOMAIN_CONSOLE_SAFE the console is opened only in the
* case where the hypervisor driver supports safe (mutually exclusive)
* console handling.
*
* Older servers did not support either flag, and also did not forbid
* simultaneous clients on a console, with potentially confusing results.
* When passing @flags of 0 in order to support a wider range of server
* versions, it is up to the client to ensure mutual exclusion.
*
* Returns 0 if the console was opened, -1 on error
*/
int
virDomainOpenConsole(virDomainPtr dom,
const char *dev_name,
virStreamPtr st,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "dev_name=%s, st=%p, flags=%x",
NULLSTR(dev_name), st, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
conn = dom->conn;
virCheckStreamGoto(st, error);
virCheckReadOnlyGoto(conn->flags, error);
if (conn != st->conn) {
virReportInvalidArg(st,
_("stream must match connection of domain '%s'"),
dom->name);
goto error;
}
if (conn->driver->domainOpenConsole) {
int ret;
ret = conn->driver->domainOpenConsole(dom, dev_name, st, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainOpenChannel:
* @dom: a domain object
* @name: the channel name, or NULL
* @st: a stream to associate with the channel
* @flags: bitwise-OR of virDomainChannelFlags
*
* This opens the host interface associated with a channel device on a
* guest, if the host interface is supported. If @name is given, it
* can match either the device alias (e.g. "channel0"), or the virtio
* target name (e.g. "org.qemu.guest_agent.0"). If @name is omitted,
* then the first channel is opened. The channel is associated with
* the passed in @st stream, which should have been opened in
* non-blocking mode for bi-directional I/O.
*
* By default, when @flags is 0, the open will fail if libvirt detects
* that the channel is already in use by another client; passing
* VIR_DOMAIN_CHANNEL_FORCE will cause libvirt to forcefully remove the
* other client prior to opening this channel.
*
* Returns 0 if the channel was opened, -1 on error
*/
int
virDomainOpenChannel(virDomainPtr dom,
const char *name,
virStreamPtr st,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "name=%s, st=%p, flags=%x",
NULLSTR(name), st, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
conn = dom->conn;
virCheckStreamGoto(st, error);
virCheckReadOnlyGoto(conn->flags, error);
if (conn != st->conn) {
virReportInvalidArg(st,
_("stream must match connection of domain '%s'"),
dom->name);
goto error;
}
if (conn->driver->domainOpenChannel) {
int ret;
ret = conn->driver->domainOpenChannel(dom, name, st, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return -1;
}
/**
* virDomainGetPerfEvents:
* @domain: a domain object
* @params: where to store perf events setting
* @nparams: number of items in @params
* @flags: bitwise-OR of virDomainModificationImpact
*
* Get all Linux perf events setting. Possible fields returned in
* @params are defined by VIR_PERF_EVENT_* macros and new fields
* will likely be introduced in the future.
*
* Linux perf events are performance analyzing tool in Linux.
*
* Returns -1 in case of failure, 0 in case of success.
*/
int virDomainGetPerfEvents(virDomainPtr domain,
virTypedParameterPtr *params,
int *nparams,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%p flags=%x",
params, nparams, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckNonNullArgGoto(params, error);
virCheckNonNullArgGoto(nparams, error);
conn = domain->conn;
if (conn->driver->domainGetPerfEvents) {
int ret;
ret = conn->driver->domainGetPerfEvents(domain, params,
nparams, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSetPerfEvents:
* @domain: a domain object
* @params: pointer to perf events parameter object
* @nparams: number of perf event parameters (this value can be the same
* less than the number of parameters supported)
* @flags: bitwise-OR of virDomainModificationImpact
*
* Enable or disable the particular list of Linux perf events you
* care about. The @params argument should contain any subset of
* VIR_PERF_EVENT_ macros.
*
* Linux perf events are performance analyzing tool in Linux.
*
* Returns -1 in case of error, 0 in case of success.
*/
int virDomainSetPerfEvents(virDomainPtr domain,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d flags=%x",
params, nparams, flags);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(params, error);
virCheckPositiveArgGoto(nparams, error);
if (virTypedParameterValidateSet(conn, params, nparams) < 0)
goto error;
if (conn->driver->domainSetPerfEvents) {
int ret;
ret = conn->driver->domainSetPerfEvents(domain, params,
nparams, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainBlockJobAbort:
* @dom: pointer to domain object
* @disk: path to the block device, or device shorthand
* @flags: bitwise-OR of virDomainBlockJobAbortFlags
*
* Cancel the active block job on the given disk.
*
* The @disk parameter is either an unambiguous source name of the
* block device (the <source file='...'/> sub-element, such as
* "/path/to/image"), or (since 0.9.5) the device target shorthand
* (the <target dev='...'/> sub-element, such as "vda"). Valid names
* can be found by calling virDomainGetXMLDesc() and inspecting
* elements within //domain/devices/disk.
*
* If the current block job for @disk is VIR_DOMAIN_BLOCK_JOB_TYPE_PULL, then
* by default, this function performs a synchronous operation and the caller
* may assume that the operation has completed when 0 is returned. However,
* BlockJob operations may take a long time to cancel, and during this time
* further domain interactions may be unresponsive. To avoid this problem,
* pass VIR_DOMAIN_BLOCK_JOB_ABORT_ASYNC in the @flags argument to enable
* asynchronous behavior, returning as soon as possible. When the job has
* been canceled, a BlockJob event will be emitted, with status
* VIR_DOMAIN_BLOCK_JOB_CANCELED (even if the ABORT_ASYNC flag was not
* used); it is also possible to poll virDomainBlockJobInfo() to see if
* the job cancellation is still pending. This type of job can be restarted
* to pick up from where it left off.
*
* If the current block job for @disk is VIR_DOMAIN_BLOCK_JOB_TYPE_COPY, then
* the default is to abort the mirroring and revert to the source disk;
* likewise, if the current job is VIR_DOMAIN_BLOCK_JOB_TYPE_ACTIVE_COMMIT,
* the default is to abort without changing the active layer of @disk.
* Adding @flags of VIR_DOMAIN_BLOCK_JOB_ABORT_PIVOT causes this call to
* fail with VIR_ERR_BLOCK_COPY_ACTIVE if the copy or commit is not yet
* ready; otherwise it will swap the disk over to the new active image
* to end the mirroring or active commit. An event will be issued when the
* job is ended, and it is possible to use VIR_DOMAIN_BLOCK_JOB_ABORT_ASYNC
* to control whether this command waits for the completion of the job.
* Restarting a copy or active commit job requires starting over from the
* beginning of the first phase.
*
* Returns -1 in case of failure, 0 when successful.
*/
int
virDomainBlockJobAbort(virDomainPtr dom, const char *disk,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "disk=%s, flags=%x", disk, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
conn = dom->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(disk, error);
if (conn->driver->domainBlockJobAbort) {
int ret;
ret = conn->driver->domainBlockJobAbort(dom, disk, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainGetBlockJobInfo:
* @dom: pointer to domain object
* @disk: path to the block device, or device shorthand
* @info: pointer to a virDomainBlockJobInfo structure
* @flags: bitwise-OR of virDomainBlockJobInfoFlags
*
* Request block job information for the given disk. If an operation is active
* @info will be updated with the current progress. The units used for the
* bandwidth field of @info depends on @flags. If @flags includes
* VIR_DOMAIN_BLOCK_JOB_INFO_BANDWIDTH_BYTES, bandwidth is in bytes/second
* (although this mode can risk failure due to overflow, depending on both
* client and server word size); otherwise, the value is rounded up to MiB/s.
*
* The @disk parameter is either an unambiguous source name of the
* block device (the <source file='...'/> sub-element, such as
* "/path/to/image"), or (since 0.9.5) the device target shorthand
* (the <target dev='...'/> sub-element, such as "vda"). Valid names
* can be found by calling virDomainGetXMLDesc() and inspecting
* elements within //domain/devices/disk.
*
* As a corner case underlying hypervisor may report cur == 0 and
* end == 0 when the block job hasn't been started yet. In this
* case libvirt reports cur = 0 and end = 1. However, hypervisor
* may return cur == 0 and end == 0 if the block job has finished
* and was no-op. In this case libvirt reports cur = 1 and end = 1.
* Since 2.3.0.
*
* Returns -1 in case of failure, 0 when nothing found, 1 when info was found.
*/
int
virDomainGetBlockJobInfo(virDomainPtr dom, const char *disk,
virDomainBlockJobInfoPtr info, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "disk=%s, info=%p, flags=%x", disk, info, flags);
virResetLastError();
if (info)
memset(info, 0, sizeof(*info));
virCheckDomainReturn(dom, -1);
conn = dom->conn;
virCheckNonNullArgGoto(disk, error);
virCheckNonNullArgGoto(info, error);
if (conn->driver->domainGetBlockJobInfo) {
int ret;
ret = conn->driver->domainGetBlockJobInfo(dom, disk, info, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainBlockJobSetSpeed:
* @dom: pointer to domain object
* @disk: path to the block device, or device shorthand
* @bandwidth: specify bandwidth limit; flags determine the unit
* @flags: bitwise-OR of virDomainBlockJobSetSpeedFlags
*
* Set the maximimum allowable bandwidth that a block job may consume. If
* bandwidth is 0, the limit will revert to the hypervisor default of
* unlimited.
*
* If @flags contains VIR_DOMAIN_BLOCK_JOB_SPEED_BANDWIDTH_BYTES, @bandwidth
* is in bytes/second; otherwise, it is in MiB/second. Values larger than
* 2^52 bytes/sec may be rejected due to overflow considerations based on
* the word size of both client and server, and values larger than 2^31
* bytes/sec may cause overflow problems if later queried by
* virDomainGetBlockJobInfo() without scaling. Hypervisors may further
* restrict the range of valid bandwidth values.
*
* The @disk parameter is either an unambiguous source name of the
* block device (the <source file='...'/> sub-element, such as
* "/path/to/image"), or (since 0.9.5) the device target shorthand
* (the <target dev='...'/> sub-element, such as "vda"). Valid names
* can be found by calling virDomainGetXMLDesc() and inspecting
* elements within //domain/devices/disk.
*
* Returns -1 in case of failure, 0 when successful.
*/
int
virDomainBlockJobSetSpeed(virDomainPtr dom, const char *disk,
unsigned long bandwidth, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "disk=%s, bandwidth=%lu, flags=%x",
disk, bandwidth, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
conn = dom->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(disk, error);
if (conn->driver->domainBlockJobSetSpeed) {
int ret;
ret = conn->driver->domainBlockJobSetSpeed(dom, disk, bandwidth, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainBlockPull:
* @dom: pointer to domain object
* @disk: path to the block device, or device shorthand
* @bandwidth: (optional) specify bandwidth limit; flags determine the unit
* @flags: bitwise-OR of virDomainBlockPullFlags
*
* Populate a disk image with data from its backing image. Once all data from
* its backing image has been pulled, the disk no longer depends on a backing
* image. This function pulls data for the entire device in the background.
* Progress of the operation can be checked with virDomainGetBlockJobInfo() and
* the operation can be aborted with virDomainBlockJobAbort(). When finished,
* an asynchronous event is raised to indicate the final status. To move
* data in the opposite direction, see virDomainBlockCommit().
*
* The @disk parameter is either an unambiguous source name of the
* block device (the <source file='...'/> sub-element, such as
* "/path/to/image"), or (since 0.9.5) the device target shorthand
* (the <target dev='...'/> sub-element, such as "vda"). Valid names
* can be found by calling virDomainGetXMLDesc() and inspecting
* elements within //domain/devices/disk.
*
* The maximum bandwidth that will be used to do the copy can be
* specified with the @bandwidth parameter. If set to 0, there is no
* limit. If @flags includes VIR_DOMAIN_BLOCK_PULL_BANDWIDTH_BYTES,
* @bandwidth is in bytes/second; otherwise, it is in MiB/second.
* Values larger than 2^52 bytes/sec may be rejected due to overflow
* considerations based on the word size of both client and server,
* and values larger than 2^31 bytes/sec may cause overflow problems
* if later queried by virDomainGetBlockJobInfo() without scaling.
* Hypervisors may further restrict the range of valid bandwidth
* values. Some hypervisors do not support this feature and will
* return an error if bandwidth is not 0; in this case, it might still
* be possible for a later call to virDomainBlockJobSetSpeed() to
* succeed. The actual speed can be determined with
* virDomainGetBlockJobInfo().
*
* This is shorthand for virDomainBlockRebase() with a NULL base.
*
* Returns 0 if the operation has started, -1 on failure.
*/
int
virDomainBlockPull(virDomainPtr dom, const char *disk,
unsigned long bandwidth, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "disk=%s, bandwidth=%lu, flags=%x",
disk, bandwidth, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
conn = dom->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(disk, error);
if (conn->driver->domainBlockPull) {
int ret;
ret = conn->driver->domainBlockPull(dom, disk, bandwidth, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainBlockRebase:
* @dom: pointer to domain object
* @disk: path to the block device, or device shorthand
* @base: path to backing file to keep, or device shorthand,
* or NULL for no backing file
* @bandwidth: (optional) specify bandwidth limit; flags determine the unit
* @flags: bitwise-OR of virDomainBlockRebaseFlags
*
* Populate a disk image with data from its backing image chain, and
* setting the backing image to @base, or alternatively copy an entire
* backing chain to a new file @base.
*
* When @flags is 0, this starts a pull, where @base must be the absolute
* path of one of the backing images further up the chain, or NULL to
* convert the disk image so that it has no backing image. Once all
* data from its backing image chain has been pulled, the disk no
* longer depends on those intermediate backing images. This function
* pulls data for the entire device in the background. Progress of
* the operation can be checked with virDomainGetBlockJobInfo() with a
* job type of VIR_DOMAIN_BLOCK_JOB_TYPE_PULL, and the operation can be
* aborted with virDomainBlockJobAbort(). When finished, an asynchronous
* event is raised to indicate the final status, and the job no longer
* exists. If the job is aborted, a new one can be started later to
* resume from the same point.
*
* If @flags contains VIR_DOMAIN_BLOCK_REBASE_RELATIVE, the name recorded
* into the active disk as the location for @base will be kept relative.
* The operation will fail if libvirt can't infer the name.
*
* When @flags includes VIR_DOMAIN_BLOCK_REBASE_COPY, this starts a copy,
* where @base must be the name of a new file to copy the chain to. By
* default, the copy will pull the entire source chain into the destination
* file, but if @flags also contains VIR_DOMAIN_BLOCK_REBASE_SHALLOW, then
* only the top of the source chain will be copied (the source and
* destination have a common backing file). By default, @base will be
* created with the same file format as the source, but this can be altered
* by adding VIR_DOMAIN_BLOCK_REBASE_COPY_RAW to force the copy to be raw
* (does not make sense with the shallow flag unless the source is also raw),
* or by using VIR_DOMAIN_BLOCK_REBASE_REUSE_EXT to reuse an existing file
* which was pre-created with the correct format and metadata and sufficient
* size to hold the copy. In case the VIR_DOMAIN_BLOCK_REBASE_SHALLOW flag
* is used the pre-created file has to exhibit the same guest visible contents
* as the backing file of the original image. This allows a management app to
* pre-create files with relative backing file names, rather than the default
* of absolute backing file names; as a security precaution, you should
* generally only use reuse_ext with the shallow flag and a non-raw
* destination file. By default, the copy destination will be treated as
* type='file', but using VIR_DOMAIN_BLOCK_REBASE_COPY_DEV treats the
* destination as type='block' (affecting how virDomainGetBlockInfo() will
* report allocation after pivoting).
*
* A copy job has two parts; in the first phase, the @bandwidth parameter
* affects how fast the source is pulled into the destination, and the job
* can only be canceled by reverting to the source file; progress in this
* phase can be tracked via the virDomainBlockJobInfo() command, with a
* job type of VIR_DOMAIN_BLOCK_JOB_TYPE_COPY. The job transitions to the
* second phase when the job info states cur == end, and remains alive to
* mirror all further changes to both source and destination. The user
* must call virDomainBlockJobAbort() to end the mirroring while choosing
* whether to revert to source or pivot to the destination. An event is
* issued when the job ends, and depending on the hypervisor, an event may
* also be issued when the job transitions from pulling to mirroring. If
* the job is aborted, a new job will have to start over from the beginning
* of the first phase.
*
* Some hypervisors will restrict certain actions, such as virDomainSave()
* or virDomainDetachDevice(), while a copy job is active; they may
* also restrict a copy job to transient domains.
*
* The @disk parameter is either an unambiguous source name of the
* block device (the <source file='...'/> sub-element, such as
* "/path/to/image"), or the device target shorthand (the
* <target dev='...'/> sub-element, such as "vda"). Valid names
* can be found by calling virDomainGetXMLDesc() and inspecting
* elements within //domain/devices/disk.
*
* The @base parameter can be either a path to a file within the backing
* chain, or the device target shorthand (the <target dev='...'/>
* sub-element, such as "vda") followed by an index to the backing chain
* enclosed in square brackets. Backing chain indexes can be found by
* inspecting //disk//backingStore/@index in the domain XML. Thus, for
* example, "vda[3]" refers to the backing store with index equal to "3"
* in the chain of disk "vda".
*
* The maximum bandwidth that will be used to do the copy can be
* specified with the @bandwidth parameter. If set to 0, there is no
* limit. If @flags includes VIR_DOMAIN_BLOCK_REBASE_BANDWIDTH_BYTES,
* @bandwidth is in bytes/second; otherwise, it is in MiB/second.
* Values larger than 2^52 bytes/sec may be rejected due to overflow
* considerations based on the word size of both client and server,
* and values larger than 2^31 bytes/sec may cause overflow problems
* if later queried by virDomainGetBlockJobInfo() without scaling.
* Hypervisors may further restrict the range of valid bandwidth
* values. Some hypervisors do not support this feature and will
* return an error if bandwidth is not 0; in this case, it might still
* be possible for a later call to virDomainBlockJobSetSpeed() to
* succeed. The actual speed can be determined with
* virDomainGetBlockJobInfo().
*
* When @base is NULL and @flags is 0, this is identical to
* virDomainBlockPull(). When @flags contains VIR_DOMAIN_BLOCK_REBASE_COPY,
* this command is shorthand for virDomainBlockCopy() where the destination
* XML encodes @base as a <disk type='file'>, @bandwidth is properly scaled
* and passed as a typed parameter, the shallow and reuse external flags
* are preserved, and remaining flags control whether the XML encodes a
* destination format of raw instead of leaving the destination identical
* to the source format or probed from the reused file.
*
* Returns 0 if the operation has started, -1 on failure.
*/
int
virDomainBlockRebase(virDomainPtr dom, const char *disk,
const char *base, unsigned long bandwidth,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "disk=%s, base=%s, bandwidth=%lu, flags=%x",
disk, NULLSTR(base), bandwidth, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
conn = dom->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(disk, error);
if (flags & VIR_DOMAIN_BLOCK_REBASE_COPY) {
virCheckNonNullArgGoto(base, error);
} else if (flags & (VIR_DOMAIN_BLOCK_REBASE_SHALLOW |
VIR_DOMAIN_BLOCK_REBASE_REUSE_EXT |
VIR_DOMAIN_BLOCK_REBASE_COPY_RAW |
VIR_DOMAIN_BLOCK_REBASE_COPY_DEV)) {
virReportInvalidArg(flags, "%s",
_("use of flags requires a copy job"));
goto error;
}
if (conn->driver->domainBlockRebase) {
int ret;
ret = conn->driver->domainBlockRebase(dom, disk, base, bandwidth,
flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainBlockCopy:
* @dom: pointer to domain object
* @disk: path to the block device, or device shorthand
* @destxml: XML description of the copy destination
* @params: Pointer to block copy parameter objects, or NULL
* @nparams: Number of block copy parameters (this value can be the same or
* less than the number of parameters supported)
* @flags: bitwise-OR of virDomainBlockCopyFlags
*
* Copy the guest-visible contents of a disk image to a new file described
* by @destxml. The destination XML has a top-level element of <disk>, and
* resembles what is used when hot-plugging a disk via virDomainAttachDevice(),
* except that only sub-elements related to describing the new host resource
* are necessary (sub-elements related to the guest view, such as <target>,
* are ignored). It is strongly recommended to include a <driver type='...'/>
* format designation for the destination, to avoid the potential of any
* security problem that might be caused by probing a file for its format.
*
* This command starts a long-running copy. By default, the copy will pull
* the entire source chain into the destination file, but if @flags also
* contains VIR_DOMAIN_BLOCK_COPY_SHALLOW, then only the top of the source
* chain will be copied (the source and destination have a common backing
* file). The format of the destination file is controlled by the <driver>
* sub-element of the XML. The destination will be created unless the
* VIR_DOMAIN_BLOCK_COPY_REUSE_EXT flag is present stating that the file
* was pre-created with the correct format and metadata and sufficient
* size to hold the copy. In case the VIR_DOMAIN_BLOCK_COPY_SHALLOW flag
* is used the pre-created file has to exhibit the same guest visible contents
* as the backing file of the original image. This allows a management app to
* pre-create files with relative backing file names, rather than the default
* of absolute backing file names.
*
* A copy job has two parts; in the first phase, the source is copied into
* the destination, and the job can only be canceled by reverting to the
* source file; progress in this phase can be tracked via the
* virDomainBlockJobInfo() command, with a job type of
* VIR_DOMAIN_BLOCK_JOB_TYPE_COPY. The job transitions to the second
* phase when the job info states cur == end, and remains alive to mirror
* all further changes to both source and destination. The user must
* call virDomainBlockJobAbort() to end the mirroring while choosing
* whether to revert to source or pivot to the destination. An event is
* issued when the job ends, and depending on the hypervisor, an event may
* also be issued when the job transitions from pulling to mirroring. If
* the job is aborted, a new job will have to start over from the beginning
* of the first phase.
*
* Some hypervisors will restrict certain actions, such as virDomainSave()
* or virDomainDetachDevice(), while a copy job is active; they may
* also restrict a copy job to transient domains.
*
* The @disk parameter is either an unambiguous source name of the
* block device (the <source file='...'/> sub-element, such as
* "/path/to/image"), or the device target shorthand (the
* <target dev='...'/> sub-element, such as "vda"). Valid names
* can be found by calling virDomainGetXMLDesc() and inspecting
* elements within //domain/devices/disk.
*
* The @params and @nparams arguments can be used to set hypervisor-specific
* tuning parameters, such as maximum bandwidth or granularity. For a
* parameter that the hypervisor understands, explicitly specifying 0
* behaves the same as omitting the parameter, to use the hypervisor
* default; however, omitting a parameter is less likely to fail.
*
* This command is a superset of the older virDomainBlockRebase() when used
* with the VIR_DOMAIN_BLOCK_REBASE_COPY flag, and offers better control
* over the destination format, the ability to copy to a destination that
* is not a local file, and the possibility of additional tuning parameters.
*
* Returns 0 if the operation has started, -1 on failure.
*/
int
virDomainBlockCopy(virDomainPtr dom, const char *disk,
const char *destxml,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom,
"disk=%s, destxml=%s, params=%p, nparams=%d, flags=%x",
disk, destxml, params, nparams, flags);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
virResetLastError();
virCheckDomainReturn(dom, -1);
conn = dom->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(disk, error);
virCheckNonNullArgGoto(destxml, error);
virCheckNonNegativeArgGoto(nparams, error);
if (nparams)
virCheckNonNullArgGoto(params, error);
if (conn->driver->domainBlockCopy) {
int ret;
ret = conn->driver->domainBlockCopy(dom, disk, destxml,
params, nparams, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainBlockCommit:
* @dom: pointer to domain object
* @disk: path to the block device, or device shorthand
* @base: path to backing file to merge into, or device shorthand,
* or NULL for default
* @top: path to file within backing chain that contains data to be merged,
* or device shorthand, or NULL to merge all possible data
* @bandwidth: (optional) specify bandwidth limit; flags determine the unit
* @flags: bitwise-OR of virDomainBlockCommitFlags
*
* Commit changes that were made to temporary top-level files within a disk
* image backing file chain into a lower-level base file. In other words,
* take all the difference between @base and @top, and update @base to contain
* that difference; after the commit, any portion of the chain that previously
* depended on @top will now depend on @base, and all files after @base up
* to and including @top will now be invalidated. A typical use of this
* command is to reduce the length of a backing file chain after taking an
* external disk snapshot. To move data in the opposite direction, see
* virDomainBlockPull().
*
* This command starts a long-running commit block job, whose status may
* be tracked by virDomainBlockJobInfo() with a job type of
* VIR_DOMAIN_BLOCK_JOB_TYPE_COMMIT, and the operation can be aborted with
* virDomainBlockJobAbort(). When finished, an asynchronous event is
* raised to indicate the final status, and the job no longer exists. If
* the job is aborted, it is up to the hypervisor whether starting a new
* job will resume from the same point, or start over.
*
* As a special case, if @top is the active image (or NULL), and @flags
* includes VIR_DOMAIN_BLOCK_COMMIT_ACTIVE, the block job will have a type
* of VIR_DOMAIN_BLOCK_JOB_TYPE_ACTIVE_COMMIT, and operates in two phases.
* In the first phase, the contents are being committed into @base, and the
* job can only be canceled. The job transitions to the second phase when
* the job info states cur == end, and remains alive to keep all further
* changes to @top synchronized into @base; an event with status
* VIR_DOMAIN_BLOCK_JOB_READY is also issued to mark the job transition.
* Once in the second phase, the user must choose whether to cancel the job
* (keeping @top as the active image, but now containing only the changes
* since the time the job ended) or to pivot the job (adjusting to @base as
* the active image, and invalidating @top).
*
* Be aware that this command may invalidate files even if it is aborted;
* the user is cautioned against relying on the contents of invalidated
* intermediate files such as @top (when @top is not the active image)
* without manually rebasing those files to use a backing file of a
* read-only copy of @base prior to the point where the commit operation
* was started (and such a rebase cannot be safely done until the commit
* has successfully completed). However, the domain itself will not have
* any issues; the active layer remains valid throughout the entire commit
* operation.
*
* Some hypervisors may support a shortcut where if @flags contains
* VIR_DOMAIN_BLOCK_COMMIT_DELETE, then this command will unlink all files
* that were invalidated, after the commit successfully completes.
*
* If @flags contains VIR_DOMAIN_BLOCK_COMMIT_RELATIVE, the name recorded
* into the overlay of the @top image (if there is such image) as the
* path to the new backing file will be kept relative to other images.
* The operation will fail if libvirt can't infer the name.
*
* By default, if @base is NULL, the commit target will be the bottom of
* the backing chain; if @flags contains VIR_DOMAIN_BLOCK_COMMIT_SHALLOW,
* then the immediate backing file of @top will be used instead. If @top
* is NULL, the active image at the top of the chain will be used. Some
* hypervisors place restrictions on how much can be committed, and might
* fail if @base is not the immediate backing file of @top, or if @top is
* the active layer in use by a running domain but @flags did not include
* VIR_DOMAIN_BLOCK_COMMIT_ACTIVE, or if @top is not the top-most file;
* restrictions may differ for online vs. offline domains.
*
* The @disk parameter is either an unambiguous source name of the
* block device (the <source file='...'/> sub-element, such as
* "/path/to/image"), or the device target shorthand (the
* <target dev='...'/> sub-element, such as "vda"). Valid names
* can be found by calling virDomainGetXMLDesc() and inspecting
* elements within //domain/devices/disk.
*
* The @base and @top parameters can be either paths to files within the
* backing chain, or the device target shorthand (the <target dev='...'/>
* sub-element, such as "vda") followed by an index to the backing chain
* enclosed in square brackets. Backing chain indexes can be found by
* inspecting //disk//backingStore/@index in the domain XML. Thus, for
* example, "vda[3]" refers to the backing store with index equal to "3"
* in the chain of disk "vda".
*
* The maximum bandwidth that will be used to do the commit can be
* specified with the @bandwidth parameter. If set to 0, there is no
* limit. If @flags includes VIR_DOMAIN_BLOCK_COMMIT_BANDWIDTH_BYTES,
* @bandwidth is in bytes/second; otherwise, it is in MiB/second.
* Values larger than 2^52 bytes/sec may be rejected due to overflow
* considerations based on the word size of both client and server,
* and values larger than 2^31 bytes/sec may cause overflow problems
* if later queried by virDomainGetBlockJobInfo() without scaling.
* Hypervisors may further restrict the range of valid bandwidth
* values. Some hypervisors do not support this feature and will
* return an error if bandwidth is not 0; in this case, it might still
* be possible for a later call to virDomainBlockJobSetSpeed() to
* succeed. The actual speed can be determined with
* virDomainGetBlockJobInfo().
*
* Returns 0 if the operation has started, -1 on failure.
*/
int
virDomainBlockCommit(virDomainPtr dom, const char *disk,
const char *base, const char *top,
unsigned long bandwidth, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "disk=%s, base=%s, top=%s, bandwidth=%lu, flags=%x",
disk, NULLSTR(base), NULLSTR(top), bandwidth, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
conn = dom->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(disk, error);
if (conn->driver->domainBlockCommit) {
int ret;
ret = conn->driver->domainBlockCommit(dom, disk, base, top, bandwidth,
flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainOpenGraphics:
* @dom: pointer to domain object
* @idx: index of graphics config to open
* @fd: file descriptor to attach graphics to
* @flags: bitwise-OR of virDomainOpenGraphicsFlags
*
* This will attempt to connect the file descriptor @fd, to
* the graphics backend of @dom. If @dom has multiple graphics
* backends configured, then @idx will determine which one is
* opened, starting from @idx 0.
*
* To disable any authentication, pass the VIR_DOMAIN_OPEN_GRAPHICS_SKIPAUTH
* constant for @flags.
*
* The caller should use an anonymous socketpair to open
* @fd before invocation.
*
* This method can only be used when connected to a local
* libvirt hypervisor, over a UNIX domain socket. Attempts
* to use this method over a TCP connection will always fail
*
* Returns 0 on success, -1 on failure
*/
int
virDomainOpenGraphics(virDomainPtr dom,
unsigned int idx,
int fd,
unsigned int flags)
{
struct stat sb;
VIR_DOMAIN_DEBUG(dom, "idx=%u, fd=%d, flags=%x",
idx, fd, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
virCheckNonNegativeArgGoto(fd, error);
if (fstat(fd, &sb) < 0) {
virReportSystemError(errno,
_("Unable to access file descriptor %d"), fd);
goto error;
}
if (!S_ISSOCK(sb.st_mode)) {
virReportInvalidArg(fd,
_("fd %d must be a socket"),
fd);
goto error;
}
virCheckReadOnlyGoto(dom->conn->flags, error);
if (!VIR_DRV_SUPPORTS_FEATURE(dom->conn->driver, dom->conn,
VIR_DRV_FEATURE_FD_PASSING)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("fd passing is not supported by this connection"));
goto error;
}
if (dom->conn->driver->domainOpenGraphics) {
int ret;
ret = dom->conn->driver->domainOpenGraphics(dom, idx, fd, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainOpenGraphicsFD:
* @dom: pointer to domain object
* @idx: index of graphics config to open
* @flags: bitwise-OR of virDomainOpenGraphicsFlags
*
* This will create a socket pair connected to the graphics backend of @dom.
* One end of the socket will be returned on success, and the other end is
* handed to the hypervisor.
* If @dom has multiple graphics backends configured, then @idx will determine
* which one is opened, starting from @idx 0.
*
* To disable any authentication, pass the VIR_DOMAIN_OPEN_GRAPHICS_SKIPAUTH
* constant for @flags.
*
* This method can only be used when connected to a local
* libvirt hypervisor, over a UNIX domain socket. Attempts
* to use this method over a TCP connection will always fail.
*
* Returns an fd on success, -1 on failure
*/
int
virDomainOpenGraphicsFD(virDomainPtr dom,
unsigned int idx,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(dom, "idx=%u, flags=%x", idx, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
virCheckReadOnlyGoto(dom->conn->flags, error);
if (!VIR_DRV_SUPPORTS_FEATURE(dom->conn->driver, dom->conn,
VIR_DRV_FEATURE_FD_PASSING)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("fd passing is not supported by this connection"));
goto error;
}
if (dom->conn->driver->domainOpenGraphicsFD) {
int ret;
ret = dom->conn->driver->domainOpenGraphicsFD(dom, idx, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainSetBlockIoTune:
* @dom: pointer to domain object
* @disk: path to the block device, or device shorthand
* @params: Pointer to blkio parameter objects
* @nparams: Number of blkio parameters (this value can be the same or
* less than the number of parameters supported)
* @flags: bitwise-OR of virDomainModificationImpact
*
* Change all or a subset of the per-device block IO tunables.
*
* The @disk parameter is either an unambiguous source name of the
* block device (the <source file='...'/> sub-element, such as
* "/path/to/image"), or the device target shorthand (the <target
* dev='...'/> sub-element, such as "xvda"). Valid names can be found
* by calling virDomainGetXMLDesc() and inspecting elements
* within //domain/devices/disk.
*
* Returns -1 in case of error, 0 in case of success.
*/
int
virDomainSetBlockIoTune(virDomainPtr dom,
const char *disk,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "disk=%s, params=%p, nparams=%d, flags=%x",
disk, params, nparams, flags);
VIR_TYPED_PARAMS_DEBUG(params, nparams);
virResetLastError();
virCheckDomainReturn(dom, -1);
conn = dom->conn;
virCheckReadOnlyGoto(conn->flags, error);
virCheckNonNullArgGoto(disk, error);
virCheckPositiveArgGoto(nparams, error);
virCheckNonNullArgGoto(params, error);
if (virTypedParameterValidateSet(dom->conn, params, nparams) < 0)
goto error;
if (conn->driver->domainSetBlockIoTune) {
int ret;
ret = conn->driver->domainSetBlockIoTune(dom, disk, params, nparams, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainGetBlockIoTune:
* @dom: pointer to domain object
* @disk: path to the block device, or device shorthand
* @params: Pointer to blkio parameter object
* (return value, allocated by the caller)
* @nparams: Pointer to number of blkio parameters
* @flags: bitwise-OR of virDomainModificationImpact and virTypedParameterFlags
*
* Get all block IO tunable parameters for a given device. On input,
* @nparams gives the size of the @params array; on output, @nparams
* gives how many slots were filled with parameter information, which
* might be less but will not exceed the input value.
*
* As a special case, calling with @params as NULL and @nparams as 0
* on input will cause @nparams on output to contain the number of
* parameters supported by the hypervisor, either for the given @disk
* (note that block devices of different types might support different
* parameters), or if @disk is NULL, for all possible disks. The
* caller should then allocate @params array,
* i.e. (sizeof(@virTypedParameter) * @nparams) bytes and call the API
* again. See virDomainGetMemoryParameters() for more details.
*
* The @disk parameter is either an unambiguous source name of the
* block device (the <source file='...'/> sub-element, such as
* "/path/to/image"), or the device target shorthand (the <target
* dev='...'/> sub-element, such as "xvda"). Valid names can be found
* by calling virDomainGetXMLDesc() and inspecting elements
* within //domain/devices/disk. This parameter cannot be NULL
* unless @nparams is 0 on input.
*
* Returns -1 in case of error, 0 in case of success.
*/
int
virDomainGetBlockIoTune(virDomainPtr dom,
const char *disk,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(dom, "disk=%s, params=%p, nparams=%d, flags=%x",
NULLSTR(disk), params, (nparams) ? *nparams : -1, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
virCheckNonNullArgGoto(nparams, error);
virCheckNonNegativeArgGoto(*nparams, error);
if (*nparams != 0) {
virCheckNonNullArgGoto(params, error);
virCheckNonNullArgGoto(disk, error);
}
if (VIR_DRV_SUPPORTS_FEATURE(dom->conn->driver, dom->conn,
VIR_DRV_FEATURE_TYPED_PARAM_STRING))
flags |= VIR_TYPED_PARAM_STRING_OKAY;
VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
VIR_DOMAIN_AFFECT_CONFIG,
error);
conn = dom->conn;
if (conn->driver->domainGetBlockIoTune) {
int ret;
ret = conn->driver->domainGetBlockIoTune(dom, disk, params, nparams, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainGetCPUStats:
* @domain: domain to query
* @params: array to populate on output
* @nparams: number of parameters per cpu
* @start_cpu: which cpu to start with, or -1 for summary
* @ncpus: how many cpus to query
* @flags: bitwise-OR of virTypedParameterFlags
*
* Get statistics relating to CPU usage attributable to a single
* domain (in contrast to the statistics returned by
* virNodeGetCPUStats() for all processes on the host). @dom
* must be running (an inactive domain has no attributable cpu
* usage). On input, @params must contain at least @nparams * @ncpus
* entries, allocated by the caller.
*
* If @start_cpu is -1, then @ncpus must be 1, and the returned
* results reflect the statistics attributable to the entire
* domain (such as user and system time for the process as a
* whole). Otherwise, @start_cpu represents which cpu to start
* with, and @ncpus represents how many consecutive processors to
* query, with statistics attributable per processor (such as
* per-cpu usage). If @ncpus is larger than the number of cpus
* available to query, then the trailing part of the array will
* be unpopulated.
*
* The remote driver imposes a limit of 128 @ncpus and 16 @nparams;
* the number of parameters per cpu should not exceed 16, but if you
* have a host with more than 128 CPUs, your program should split
* the request into multiple calls.
*
* As special cases, if @params is NULL and @nparams is 0 and
* @ncpus is 1, and the return value will be how many
* statistics are available for the given @start_cpu. This number
* may be different for @start_cpu of -1 than for any non-negative
* value, but will be the same for all non-negative @start_cpu.
* Likewise, if @params is NULL and @nparams is 0 and @ncpus is 0,
* the number of cpus available to query is returned. From the
* host perspective, this would typically match the cpus member
* of virNodeGetInfo(), but might be less due to host cpu hotplug.
*
* For now, @flags is unused, and the statistics all relate to the
* usage from the host perspective. It is possible that a future
* version will support a flag that queries the cpu usage from the
* guest's perspective, where the maximum cpu to query would be
* related to virDomainGetVcpusFlags() rather than virNodeGetInfo().
* An individual guest vcpu cannot be reliably mapped back to a
* specific host cpu unless a single-processor vcpu pinning was used,
* but when @start_cpu is -1, any difference in usage between a host
* and guest perspective would serve as a measure of hypervisor overhead.
*
* Typical use sequence is below.
*
* getting total stats: set start_cpu as -1, ncpus 1
*
* virDomainGetCPUStats(dom, NULL, 0, -1, 1, 0); // nparams
* params = calloc(nparams, sizeof(virTypedParameter))
* virDomainGetCPUStats(dom, params, nparams, -1, 1, 0); // total stats.
*
* getting per-cpu stats:
*
* virDomainGetCPUStats(dom, NULL, 0, 0, 0, 0); // ncpus
* virDomainGetCPUStats(dom, NULL, 0, 0, 1, 0); // nparams
* params = calloc(ncpus * nparams, sizeof(virTypedParameter));
* virDomainGetCPUStats(dom, params, nparams, 0, ncpus, 0); // per-cpu stats
*
* Returns -1 on failure, or the number of statistics that were
* populated per cpu on success (this will be less than the total
* number of populated @params, unless @ncpus was 1; and may be
* less than @nparams). The populated parameters start at each
* stride of @nparams, which means the results may be discontiguous;
* any unpopulated parameters will be zeroed on success (this includes
* skipped elements if @nparams is too large, and tail elements if
* @ncpus is too large). The caller is responsible for freeing any
* returned string parameters.
*/
int
virDomainGetCPUStats(virDomainPtr domain,
virTypedParameterPtr params,
unsigned int nparams,
int start_cpu,
unsigned int ncpus,
unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain,
"params=%p, nparams=%d, start_cpu=%d, ncpus=%u, flags=%x",
params, nparams, start_cpu, ncpus, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
conn = domain->conn;
/* Special cases:
* start_cpu must be non-negative, or else -1
* if start_cpu is -1, ncpus must be 1
* params == NULL must match nparams == 0
* ncpus must be non-zero unless params == NULL
* nparams * ncpus must not overflow (RPC may restrict it even more)
*/
if (start_cpu == -1) {
if (ncpus != 1) {
virReportInvalidArg(start_cpu, "%s",
_("ncpus must be 1 when start_cpu is -1"));
goto error;
}
} else {
virCheckNonNegativeArgGoto(start_cpu, error);
}
if (nparams)
virCheckNonNullArgGoto(params, error);
else
virCheckNullArgGoto(params, error);
if (ncpus == 0)
virCheckNullArgGoto(params, error);
if (nparams && ncpus > UINT_MAX / nparams) {
virReportError(VIR_ERR_OVERFLOW, _("input too large: %u * %u"),
nparams, ncpus);
goto error;
}
if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_TYPED_PARAM_STRING))
flags |= VIR_TYPED_PARAM_STRING_OKAY;
if (conn->driver->domainGetCPUStats) {
int ret;
ret = conn->driver->domainGetCPUStats(domain, params, nparams,
start_cpu, ncpus, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainGetDiskErrors:
* @dom: a domain object
* @errors: array to populate on output
* @maxerrors: size of @errors array
* @flags: extra flags; not used yet, so callers should always pass 0
*
* The function populates @errors array with all disks that encountered an
* I/O error. Disks with no error will not be returned in the @errors array.
* Each disk is identified by its target (the dev attribute of target
* subelement in domain XML), such as "vda", and accompanied with the error
* that was seen on it. The caller is also responsible for calling free()
* on each disk name returned.
*
* In a special case when @errors is NULL and @maxerrors is 0, the function
* returns preferred size of @errors that the caller should use to get all
* disk errors.
*
* Since calling virDomainGetDiskErrors(dom, NULL, 0, 0) to get preferred size
* of @errors array and getting the errors are two separate operations, new
* disks may be hotplugged to the domain and new errors may be encountered
* between the two calls. Thus, this function may not return all disk errors
* because the supplied array is not large enough. Such errors may, however,
* be detected by listening to domain events.
*
* Returns number of disks with errors filled in the @errors array or -1 on
* error.
*/
int
virDomainGetDiskErrors(virDomainPtr dom,
virDomainDiskErrorPtr errors,
unsigned int maxerrors,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(dom, "errors=%p, maxerrors=%u, flags=%x",
errors, maxerrors, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
if (maxerrors)
virCheckNonNullArgGoto(errors, error);
else
virCheckNullArgGoto(errors, error);
if (dom->conn->driver->domainGetDiskErrors) {
int ret = dom->conn->driver->domainGetDiskErrors(dom, errors,
maxerrors, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainGetHostname:
* @domain: a domain object
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Get the hostname for that domain.
*
* Dependent on hypervisor used, this may require a guest agent to be
* available.
*
* Returns the hostname which must be freed by the caller, or
* NULL if there was an error.
*/
char *
virDomainGetHostname(virDomainPtr domain, unsigned int flags)
{
virConnectPtr conn;
VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);
virResetLastError();
virCheckDomainReturn(domain, NULL);
conn = domain->conn;
if (conn->driver->domainGetHostname) {
char *ret;
ret = conn->driver->domainGetHostname(domain, flags);
if (!ret)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return NULL;
}
/**
* virDomainFSTrim:
* @dom: a domain object
* @mountPoint: which mount point to trim
* @minimum: Minimum contiguous free range to discard in bytes
* @flags: extra flags, not used yet, so callers should always pass 0
*
* Calls FITRIM within the guest (hence guest agent may be
* required depending on hypervisor used). Either call it on each
* mounted filesystem (@mountPoint is NULL) or just on specified
* @mountPoint. @minimum hints that free ranges smaller than this
* may be ignored (this is a hint and the guest may not respect
* it). By increasing this value, the fstrim operation will
* complete more quickly for filesystems with badly fragmented
* free space, although not all blocks will be discarded.
* If @minimum is not zero, the command may fail.
*
* Returns 0 on success, -1 otherwise.
*/
int
virDomainFSTrim(virDomainPtr dom,
const char *mountPoint,
unsigned long long minimum,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(dom, "mountPoint=%s, minimum=%llu, flags=%x",
mountPoint, minimum, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
virCheckReadOnlyGoto(dom->conn->flags, error);
if (dom->conn->driver->domainFSTrim) {
int ret = dom->conn->driver->domainFSTrim(dom, mountPoint,
minimum, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainFSFreeze:
* @dom: a domain object
* @mountpoints: list of mount points to be frozen
* @nmountpoints: the number of mount points specified in @mountpoints
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Freeze specified filesystems within the guest (hence guest agent
* may be required depending on hypervisor used). If @mountpoints is NULL and
* @nmountpoints is 0, every mounted filesystem on the guest is frozen.
* In some environments (e.g. QEMU guest with guest agent which doesn't
* support mountpoints argument), @mountpoints may need to be NULL.
*
* Returns the number of frozen filesystems on success, -1 otherwise.
*/
int
virDomainFSFreeze(virDomainPtr dom,
const char **mountpoints,
unsigned int nmountpoints,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(dom, "mountpoints=%p, nmountpoints=%d, flags=%x",
mountpoints, nmountpoints, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
virCheckReadOnlyGoto(dom->conn->flags, error);
if (nmountpoints)
virCheckNonNullArgGoto(mountpoints, error);
else
virCheckNullArgGoto(mountpoints, error);
if (dom->conn->driver->domainFSFreeze) {
int ret = dom->conn->driver->domainFSFreeze(
dom, mountpoints, nmountpoints, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainFSThaw:
* @dom: a domain object
* @mountpoints: list of mount points to be thawed
* @nmountpoints: the number of mount points specified in @mountpoints
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Thaw specified filesystems within the guest. If @mountpoints is NULL and
* @nmountpoints is 0, every mounted filesystem on the guest is thawed.
* In some drivers (e.g. QEMU driver), @mountpoints may need to be NULL.
*
* Returns the number of thawed filesystems on success, -1 otherwise.
*/
int
virDomainFSThaw(virDomainPtr dom,
const char **mountpoints,
unsigned int nmountpoints,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(dom, "flags=%x", flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
virCheckReadOnlyGoto(dom->conn->flags, error);
if (nmountpoints)
virCheckNonNullArgGoto(mountpoints, error);
else
virCheckNullArgGoto(mountpoints, error);
if (dom->conn->driver->domainFSThaw) {
int ret = dom->conn->driver->domainFSThaw(
dom, mountpoints, nmountpoints, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainGetTime:
* @dom: a domain object
* @seconds: domain's time in seconds
* @nseconds: the nanoscond part of @seconds
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Extract information about guest time and store it into
* @seconds and @nseconds. The @seconds represents the number of
* seconds since the UNIX Epoch of 1970-01-01 00:00:00 in UTC.
*
* Please note that some hypervisors may require guest agent to
* be configured and running in order to run this API.
*
* Returns 0 on success, -1 otherwise.
*/
int
virDomainGetTime(virDomainPtr dom,
long long *seconds,
unsigned int *nseconds,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(dom, "seconds=%p, nseconds=%p, flags=%x",
seconds, nseconds, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
virCheckReadOnlyGoto(dom->conn->flags, error);
if (dom->conn->driver->domainGetTime) {
int ret = dom->conn->driver->domainGetTime(dom, seconds,
nseconds, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainSetTime:
* @dom: a domain object
* @seconds: time to set
* @nseconds: the nanosecond part of @seconds
* @flags: bitwise-OR of virDomainSetTimeFlags
*
* When a domain is suspended or restored from a file the
* domain's OS has no idea that there was a big gap in the time.
* Depending on how long the gap was, NTP might not be able to
* resynchronize the guest.
*
* This API tries to set guest time to the given value. The time
* to set (@seconds and @nseconds) should be in seconds relative
* to the Epoch of 1970-01-01 00:00:00 in UTC.
*
* Please note that some hypervisors may require guest agent to
* be configured and running in order to be able to run this API.
*
* Returns 0 on success, -1 otherwise.
*/
int
virDomainSetTime(virDomainPtr dom,
long long seconds,
unsigned int nseconds,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(dom, "seconds=%lld, nseconds=%u, flags=%x",
seconds, nseconds, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
virCheckReadOnlyGoto(dom->conn->flags, error);
if (dom->conn->driver->domainSetTime) {
int ret = dom->conn->driver->domainSetTime(dom, seconds,
nseconds, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainSetUserPassword:
* @dom: a domain object
* @user: the username that will get a new password
* @password: the password to set
* @flags: bitwise-OR of virDomainSetUserPasswordFlags
*
* Sets the @user password to the value specified by @password.
* If @flags contain VIR_DOMAIN_PASSWORD_ENCRYPTED, the password
* is assumed to be encrypted by the method required by the guest OS.
*
* Please note that some hypervisors may require guest agent to
* be configured and running in order to be able to run this API.
*
* Returns 0 on success, -1 otherwise.
*/
int
virDomainSetUserPassword(virDomainPtr dom,
const char *user,
const char *password,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(dom, "user=%s, password=%s, flags=%x",
NULLSTR(user), NULLSTR(password), flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
virCheckReadOnlyGoto(dom->conn->flags, error);
virCheckNonNullArgGoto(user, error);
virCheckNonNullArgGoto(password, error);
if (dom->conn->driver->domainSetUserPassword) {
int ret = dom->conn->driver->domainSetUserPassword(dom, user, password,
flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virConnectGetDomainCapabilities:
* @conn: pointer to the hypervisor connection
* @emulatorbin: path to emulator
* @arch: domain architecture
* @machine: machine type
* @virttype: virtualization type
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Prior creating a domain (for instance via virDomainCreateXML
* or virDomainDefineXML) it may be suitable to know what the
* underlying emulator and/or libvirt is capable of. For
* instance, if host, libvirt and qemu is capable of VFIO
* passthrough and so on.
*
* Returns NULL in case of error or an XML string
* defining the capabilities.
*/
char *
virConnectGetDomainCapabilities(virConnectPtr conn,
const char *emulatorbin,
const char *arch,
const char *machine,
const char *virttype,
unsigned int flags)
{
VIR_DEBUG("conn=%p, emulatorbin=%s, arch=%s, "
"machine=%s, virttype=%s, flags=%x",
conn, NULLSTR(emulatorbin), NULLSTR(arch),
NULLSTR(machine), NULLSTR(virttype), flags);
virResetLastError();
virCheckConnectReturn(conn, NULL);
if (conn->driver->connectGetDomainCapabilities) {
char *ret;
ret = conn->driver->connectGetDomainCapabilities(conn, emulatorbin,
arch, machine,
virttype, flags);
if (!ret)
goto error;
VIR_DEBUG("conn=%p, ret=%s", conn, ret);
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(conn);
return NULL;
}
/**
* virConnectGetAllDomainStats:
* @conn: pointer to the hypervisor connection
* @stats: stats to return, binary-OR of virDomainStatsTypes
* @retStats: Pointer that will be filled with the array of returned stats
* @flags: extra flags; binary-OR of virConnectGetAllDomainStatsFlags
*
* Query statistics for all domains on a given connection.
*
* Report statistics of various parameters for a running VM according to @stats
* field. The statistics are returned as an array of structures for each queried
* domain. The structure contains an array of typed parameters containing the
* individual statistics. The typed parameter name for each statistic field
* consists of a dot-separated string containing name of the requested group
* followed by a group specific description of the statistic value.
*
* The statistic groups are enabled using the @stats parameter which is a
* binary-OR of enum virDomainStatsTypes. The following groups are available
* (although not necessarily implemented for each hypervisor):
*
* VIR_DOMAIN_STATS_STATE:
* Return domain state and reason for entering that state. The typed
* parameter keys are in this format:
*
* "state.state" - state of the VM, returned as int from virDomainState enum
* "state.reason" - reason for entering given state, returned as int from
* virDomain*Reason enum corresponding to given state.
*
* VIR_DOMAIN_STATS_CPU_TOTAL:
* Return CPU statistics and usage information. The typed parameter keys
* are in this format:
*
* "cpu.time" - total cpu time spent for this domain in nanoseconds
* as unsigned long long.
* "cpu.user" - user cpu time spent in nanoseconds as unsigned long long.
* "cpu.system" - system cpu time spent in nanoseconds as unsigned long
* long.
*
* VIR_DOMAIN_STATS_BALLOON:
* Return memory balloon device information.
* The typed parameter keys are in this format:
*
* "balloon.current" - the memory in kiB currently used
* as unsigned long long.
* "balloon.maximum" - the maximum memory in kiB allowed
* as unsigned long long.
*
* VIR_DOMAIN_STATS_VCPU:
* Return virtual CPU statistics.
* Due to VCPU hotplug, the vcpu.<num>.* array could be sparse.
* The actual size of the array corresponds to "vcpu.current".
* The array size will never exceed "vcpu.maximum".
* The typed parameter keys are in this format:
*
* "vcpu.current" - current number of online virtual CPUs as unsigned int.
* "vcpu.maximum" - maximum number of online virtual CPUs as unsigned int.
* "vcpu.<num>.state" - state of the virtual CPU <num>, as int
* from virVcpuState enum.
* "vcpu.<num>.time" - virtual cpu time spent by virtual CPU <num>
* as unsigned long long.
*
* VIR_DOMAIN_STATS_INTERFACE:
* Return network interface statistics.
* The typed parameter keys are in this format:
*
* "net.count" - number of network interfaces on this domain
* as unsigned int.
* "net.<num>.name" - name of the interface <num> as string.
* "net.<num>.rx.bytes" - bytes received as unsigned long long.
* "net.<num>.rx.pkts" - packets received as unsigned long long.
* "net.<num>.rx.errs" - receive errors as unsigned long long.
* "net.<num>.rx.drop" - receive packets dropped as unsigned long long.
* "net.<num>.tx.bytes" - bytes transmitted as unsigned long long.
* "net.<num>.tx.pkts" - packets transmitted as unsigned long long.
* "net.<num>.tx.errs" - transmission errors as unsigned long long.
* "net.<num>.tx.drop" - transmit packets dropped as unsigned long long.
*
* VIR_DOMAIN_STATS_BLOCK:
* Return block devices statistics. By default,
* this information is limited to the active layer of each <disk> of the
* domain (where block.count is equal to the number of disks), but adding
* VIR_CONNECT_GET_ALL_DOMAINS_STATS_BACKING to @flags will expand the
* array to cover backing chains (block.count corresponds to the number
* of host resources used together to provide the guest disks).
* The typed parameter keys are in this format:
*
* "block.count" - number of block devices in the subsequent list,
* as unsigned int.
* "block.<num>.name" - name of the block device <num> as string.
* matches the target name (vda/sda/hda) of the
* block device. If the backing chain is listed,
* this name is the same for all host resources tied
* to the same guest device.
* "block.<num>.backingIndex" - unsigned int giving the <backingStore>
* index, only used when backing images
* are listed.
* "block.<num>.path" - string describing the source of block device <num>,
* if it is a file or block device (omitted for network
* sources and drives with no media inserted).
* "block.<num>.rd.reqs" - number of read requests as unsigned long long.
* "block.<num>.rd.bytes" - number of read bytes as unsigned long long.
* "block.<num>.rd.times" - total time (ns) spent on reads as
* unsigned long long.
* "block.<num>.wr.reqs" - number of write requests as unsigned long long.
* "block.<num>.wr.bytes" - number of written bytes as unsigned long long.
* "block.<num>.wr.times" - total time (ns) spent on writes as
* unsigned long long.
* "block.<num>.fl.reqs" - total flush requests as unsigned long long.
* "block.<num>.fl.times" - total time (ns) spent on cache flushing as
* unsigned long long.
* "block.<num>.errors" - Xen only: the 'oo_req' value as
* unsigned long long.
* "block.<num>.allocation" - offset of the highest written sector
* as unsigned long long.
* "block.<num>.capacity" - logical size in bytes of the block device
* backing image as unsigned long long.
* "block.<num>.physical" - physical size in bytes of the container of the
* backing image as unsigned long long.
* "block.<num>.threshold" - current threshold for delivering the
* VIR_DOMAIN_EVENT_ID_BLOCK_THRESHOLD
* event in bytes. See virDomainSetBlockThreshold.
*
* VIR_DOMAIN_STATS_PERF:
* Return perf event statistics.
* The typed parameter keys are in this format:
*
* "perf.cmt" - the usage of l3 cache (bytes) by applications running on
* the platform as unsigned long long. It is produced by cmt
* perf event.
* "perf.mbmt" - the total system bandwidth (bytes/s) from one level of
* cache to another as unsigned long long. It is produced
* by mbmt perf event.
* "perf.mbml" - the amount of data (bytes/s) sent through the memory
* controller on the socket as unsigned long long. It is
* produced by mbml perf event.
* "perf.cache_misses" - the count of cache misses as unsigned long long.
* It is produced by cache_misses perf event.
* "perf.cache_references" - the count of cache hits as unsigned long long.
* It is produced by cache_references perf event.
* "perf.instructions" - The count of instructions as unsigned long long.
* It is produced by instructions perf event.
* "perf.cpu_cycles" - The count of cpu cycles (total/elapsed) as an
* unsigned long long. It is produced by cpu_cycles
* perf event.
* "perf.branch_instructions" - The count of branch instructions as
* unsigned long long. It is produced by
* branch_instructions perf event.
* "perf.branch_misses" - The count of branch misses as unsigned long
* long. It is produced by branch_misses perf event.
* "perf.bus_cycles" - The count of bus cycles as unsigned long
* long. It is produced by bus_cycles perf event.
* "perf.stalled_cycles_frontend" - The count of stalled cpu cycles in the
* frontend of the instruction processor
* pipeline as unsigned long long. It is
* produced by stalled_cycles_frontend
* perf event.
* "perf.stalled_cycles_backend" - The count of stalled cpu cycles in the
* backend of the instruction processor
* pipeline as unsigned long long. It is
* produced by stalled_cycles_backend
* perf event.
* "perf.ref_cpu_cycles" - The count of total cpu cycles not affected by
* CPU frequency scaling by applications running
* as unsigned long long. It is produced by the
* ref_cpu_cycles perf event.
* "perf.cpu_clock" - The count of cpu clock time as unsigned long long.
* It is produced by the cpu_clock perf event.
* "perf.task_clock" - The count of task clock time as unsigned long long.
* It is produced by the task_clock perf event.
* "perf.page_faults" - The count of page faults as unsigned long long.
* It is produced by the page_faults perf event
* "perf.context_switches" - The count of context switches as unsigned long
* long. It is produced by the context_switches
* perf event.
* "perf.cpu_migrations" - The count of cpu migrations, from one logical
* processor to another, as unsigned long
* long. It is produced by the cpu_migrations
* perf event.
* "perf.page_faults_min" - The count of minor page faults as unsigned
* long long. It is produced by the
* page_faults_min perf event.
* "perf.page_faults_maj" - The count of major page faults as unsigned
* long long. It is produced by the
* page_faults_maj perf event.
* "perf.alignment_faults" - The count of alignment faults as unsigned
* long long. It is produced by the
* alignment_faults perf event
* "perf.emulation_faults" - The count of emulation faults as unsigned
* long long. It is produced by the
* emulation_faults perf event
*
* Note that entire stats groups or individual stat fields may be missing from
* the output in case they are not supported by the given hypervisor, are not
* applicable for the current state of the guest domain, or their retrieval
* was not successful.
*
* Using 0 for @stats returns all stats groups supported by the given
* hypervisor.
*
* Specifying VIR_CONNECT_GET_ALL_DOMAINS_STATS_ENFORCE_STATS as @flags makes
* the function return error in case some of the stat types in @stats were
* not recognized by the daemon. However, even with this flag, a hypervisor
* may omit individual fields within a known group if the information is not
* available; as an extreme example, a supported group may produce zero
* fields for offline domains if the statistics are meaningful only for a
* running domain.
*
* Similarly to virConnectListAllDomains, @flags can contain various flags to
* filter the list of domains to provide stats for.
*
* VIR_CONNECT_GET_ALL_DOMAINS_STATS_ACTIVE selects online domains while
* VIR_CONNECT_GET_ALL_DOMAINS_STATS_INACTIVE selects offline ones.
*
* VIR_CONNECT_GET_ALL_DOMAINS_STATS_PERSISTENT and
* VIR_CONNECT_GET_ALL_DOMAINS_STATS_TRANSIENT allow to filter the list
* according to their persistence.
*
* To filter the list of VMs by domain state @flags can contain
* VIR_CONNECT_GET_ALL_DOMAINS_STATS_RUNNING,
* VIR_CONNECT_GET_ALL_DOMAINS_STATS_PAUSED,
* VIR_CONNECT_GET_ALL_DOMAINS_STATS_SHUTOFF and/or
* VIR_CONNECT_GET_ALL_DOMAINS_STATS_OTHER for all other states.
*
* Returns the count of returned statistics structures on success, -1 on error.
* The requested data are returned in the @retStats parameter. The returned
* array should be freed by the caller. See virDomainStatsRecordListFree.
*/
int
virConnectGetAllDomainStats(virConnectPtr conn,
unsigned int stats,
virDomainStatsRecordPtr **retStats,
unsigned int flags)
{
int ret = -1;
VIR_DEBUG("conn=%p, stats=0x%x, retStats=%p, flags=0x%x",
conn, stats, retStats, flags);
virResetLastError();
virCheckConnectReturn(conn, -1);
virCheckNonNullArgGoto(retStats, cleanup);
if (!conn->driver->connectGetAllDomainStats) {
virReportUnsupportedError();
goto cleanup;
}
ret = conn->driver->connectGetAllDomainStats(conn, NULL, 0, stats,
retStats, flags);
cleanup:
if (ret < 0)
virDispatchError(conn);
return ret;
}
/**
* virDomainListGetStats:
* @doms: NULL terminated array of domains
* @stats: stats to return, binary-OR of virDomainStatsTypes
* @retStats: Pointer that will be filled with the array of returned stats
* @flags: extra flags; binary-OR of virConnectGetAllDomainStatsFlags
*
* Query statistics for domains provided by @doms. Note that all domains in
* @doms must share the same connection.
*
* Report statistics of various parameters for a running VM according to @stats
* field. The statistics are returned as an array of structures for each queried
* domain. The structure contains an array of typed parameters containing the
* individual statistics. The typed parameter name for each statistic field
* consists of a dot-separated string containing name of the requested group
* followed by a group specific description of the statistic value.
*
* The statistic groups are enabled using the @stats parameter which is a
* binary-OR of enum virDomainStatsTypes. The stats groups are documented
* in virConnectGetAllDomainStats.
*
* Using 0 for @stats returns all stats groups supported by the given
* hypervisor.
*
* Specifying VIR_CONNECT_GET_ALL_DOMAINS_STATS_ENFORCE_STATS as @flags makes
* the function return error in case some of the stat types in @stats were
* not recognized by the daemon. However, even with this flag, a hypervisor
* may omit individual fields within a known group if the information is not
* available; as an extreme example, a supported group may produce zero
* fields for offline domains if the statistics are meaningful only for a
* running domain.
*
* Note that any of the domain list filtering flags in @flags may be rejected
* by this function.
*
* Returns the count of returned statistics structures on success, -1 on error.
* The requested data are returned in the @retStats parameter. The returned
* array should be freed by the caller. See virDomainStatsRecordListFree.
* Note that the count of returned stats may be less than the domain count
* provided via @doms.
*/
int
virDomainListGetStats(virDomainPtr *doms,
unsigned int stats,
virDomainStatsRecordPtr **retStats,
unsigned int flags)
{
virConnectPtr conn = NULL;
virDomainPtr *nextdom = doms;
unsigned int ndoms = 0;
int ret = -1;
VIR_DEBUG("doms=%p, stats=0x%x, retStats=%p, flags=0x%x",
doms, stats, retStats, flags);
virResetLastError();
virCheckNonNullArgGoto(doms, cleanup);
virCheckNonNullArgGoto(retStats, cleanup);
if (!*doms) {
virReportError(VIR_ERR_INVALID_ARG,
_("doms array in %s must contain at least one domain"),
__FUNCTION__);
goto cleanup;
}
conn = doms[0]->conn;
virCheckConnectReturn(conn, -1);
if (!conn->driver->connectGetAllDomainStats) {
virReportUnsupportedError();
goto cleanup;
}
while (*nextdom) {
virDomainPtr dom = *nextdom;
virCheckDomainGoto(dom, cleanup);
if (dom->conn != conn) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("domains in 'doms' array must belong to a "
"single connection"));
goto cleanup;
}
ndoms++;
nextdom++;
}
ret = conn->driver->connectGetAllDomainStats(conn, doms, ndoms,
stats, retStats, flags);
cleanup:
if (ret < 0)
virDispatchError(conn);
return ret;
}
/**
* virDomainStatsRecordListFree:
* @stats: NULL terminated array of virDomainStatsRecords to free
*
* Convenience function to free a list of domain stats returned by
* virDomainListGetStats and virConnectGetAllDomainStats.
*/
void
virDomainStatsRecordListFree(virDomainStatsRecordPtr *stats)
{
virDomainStatsRecordPtr *next;
if (!stats)
return;
for (next = stats; *next; next++) {
virTypedParamsFree((*next)->params, (*next)->nparams);
virDomainFree((*next)->dom);
VIR_FREE(*next);
}
VIR_FREE(stats);
}
/**
* virDomainGetFSInfo:
* @dom: a domain object
* @info: a pointer to a variable to store an array of mount points information
* @flags: extra flags; not used yet, so callers should always pass 0
*
* Get a list of mapping information for each mounted file systems within the
* specified guest and the disks.
*
* Returns the number of returned mount points, or -1 in case of error.
* On success, the array of the information is stored into @info. The caller is
* responsible for calling virDomainFSInfoFree() on each array element, then
* calling free() on @info. On error, @info is set to NULL.
*/
int
virDomainGetFSInfo(virDomainPtr dom,
virDomainFSInfoPtr **info,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(dom, "info=%p, flags=%x", info, flags);
virResetLastError();
virCheckDomainReturn(dom, -1);
virCheckReadOnlyGoto(dom->conn->flags, error);
virCheckNonNullArgGoto(info, error);
*info = NULL;
if (dom->conn->driver->domainGetFSInfo) {
int ret = dom->conn->driver->domainGetFSInfo(dom, info, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainFSInfoFree:
* @info: pointer to a FSInfo object
*
* Frees all the memory occupied by @info.
*/
void
virDomainFSInfoFree(virDomainFSInfoPtr info)
{
size_t i;
if (!info)
return;
VIR_FREE(info->mountpoint);
VIR_FREE(info->name);
VIR_FREE(info->fstype);
for (i = 0; i < info->ndevAlias; i++)
VIR_FREE(info->devAlias[i]);
VIR_FREE(info->devAlias);
VIR_FREE(info);
}
/**
* virDomainInterfaceAddresses:
* @dom: domain object
* @ifaces: pointer to an array of pointers pointing to interface objects
* @source: one of the virDomainInterfaceAddressesSource constants
* @flags: currently unused, pass zero
*
* Return a pointer to the allocated array of pointers to interfaces
* present in given domain along with their IP and MAC addresses. Note that
* single interface can have multiple or even 0 IP addresses.
*
* This API dynamically allocates the virDomainInterfacePtr struct based on
* how many interfaces domain @dom has, usually there's 1:1 correlation. The
* count of the interfaces is returned as the return value.
*
* If @source is VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_LEASE, the DHCP lease
* file associated with any virtual networks will be examined to obtain
* the interface addresses. This only returns data for interfaces which
* are connected to virtual networks managed by libvirt.
*
* If @source is VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_AGENT, a configured
* guest agent is needed for successful return from this API. Moreover, if
* guest agent is used then the interface name is the one seen by guest OS.
* To match such interface with the one from @dom XML use MAC address or IP
* range.
*
* @ifaces->name and @ifaces->hwaddr are never NULL.
*
* The caller *must* free @ifaces when no longer needed. Usual use case
* looks like this:
*
* virDomainInterfacePtr *ifaces = NULL;
* int ifaces_count = 0;
* size_t i, j;
* virDomainPtr dom = ... obtain a domain here ...;
*
* if ((ifaces_count = virDomainInterfaceAddresses(dom, &ifaces,
* VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_LEASE)) < 0)
* goto cleanup;
*
* ... do something with returned values, for example:
*
* for (i = 0; i < ifaces_count; i++) {
* printf("name: %s", ifaces[i]->name);
* if (ifaces[i]->hwaddr)
* printf(" hwaddr: %s", ifaces[i]->hwaddr);
*
* for (j = 0; j < ifaces[i]->naddrs; j++) {
* virDomainIPAddressPtr ip_addr = ifaces[i]->addrs + j;
* printf("[addr: %s prefix: %d type: %d]",
* ip_addr->addr, ip_addr->prefix, ip_addr->type);
* }
* printf("\n");
* }
*
* cleanup:
* if (ifaces && ifaces_count > 0)
* for (i = 0; i < ifaces_count; i++)
* virDomainInterfaceFree(ifaces[i]);
* free(ifaces);
*
* Returns the number of interfaces on success, -1 in case of error.
*/
int
virDomainInterfaceAddresses(virDomainPtr dom,
virDomainInterfacePtr **ifaces,
unsigned int source,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(dom, "ifaces=%p, source=%d, flags=%x", ifaces, source, flags);
virResetLastError();
if (ifaces)
*ifaces = NULL;
virCheckDomainReturn(dom, -1);
virCheckNonNullArgGoto(ifaces, error);
if (source == VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_AGENT)
virCheckReadOnlyGoto(dom->conn->flags, error);
if (dom->conn->driver->domainInterfaceAddresses) {
int ret;
ret = dom->conn->driver->domainInterfaceAddresses(dom, ifaces, source, flags);
if (ret < 0)
goto error;
return ret;
}
virReportError(VIR_ERR_NO_SUPPORT, __FUNCTION__);
error:
virDispatchError(dom->conn);
return -1;
}
/**
* virDomainInterfaceFree:
* @iface: an interface object
*
* Free the interface object. The data structure is
* freed and should not be used thereafter. If @iface
* is NULL, then this method has no effect.
*/
void
virDomainInterfaceFree(virDomainInterfacePtr iface)
{
size_t i;
if (!iface)
return;
VIR_FREE(iface->name);
VIR_FREE(iface->hwaddr);
for (i = 0; i < iface->naddrs; i++)
VIR_FREE(iface->addrs[i].addr);
VIR_FREE(iface->addrs);
VIR_FREE(iface);
}
/**
* virDomainGetGuestVcpus:
* @domain: pointer to domain object
* @params: pointer that will be filled with an array of typed parameters
* @nparams: pointer filled with number of elements in @params
* @flags: currently unused, callers shall pass 0
*
* Queries the guest agent for state and information regarding vCPUs from
* guest's perspective. The reported data depends on the guest agent
* implementation.
*
* Reported fields stored in @params:
* 'vcpus': string containing bitmap representing vCPU ids as reported by the
* guest
* 'online': string containing bitmap representing online vCPUs as reported
* by the guest agent.
* 'offlinable': string containing bitmap representing ids of vCPUs that can be
* offlined
*
* This API requires the VM to run. The caller is responsible for calling
* virTypedParamsFree to free memory returned in @params.
*
* Returns 0 on success, -1 on error.
*/
int
virDomainGetGuestVcpus(virDomainPtr domain,
virTypedParameterPtr *params,
unsigned int *nparams,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%p, flags=%x",
params, nparams, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckReadOnlyGoto(domain->conn->flags, error);
virCheckNonNullArgGoto(params, error);
virCheckNonNullArgGoto(nparams, error);
if (domain->conn->driver->domainGetGuestVcpus) {
int ret;
ret = domain->conn->driver->domainGetGuestVcpus(domain, params, nparams,
flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSetGuestVcpus:
* @domain: pointer to domain object
* @cpumap: text representation of a bitmap of vcpus to set
* @state: 0 to disable/1 to enable cpus described by @cpumap
* @flags: currently unused, callers shall pass 0
*
* Sets state of individual vcpus described by @cpumap via guest agent. Other
* vcpus are not modified.
*
* This API requires the VM to run. Various hypervisors or guest agent
* implementation may limit to operate on just 1 vCPU per call.
*
* @cpumap is a list of vCPU numbers. Its syntax is a comma separated list and
* a special markup using '-' and '^' (ex. '0-4', '0-3,^2'). The '-' denotes
* the range and the '^' denotes exclusive. The expression is sequentially
* evaluated, so "0-15,^8" is identical to "9-14,0-7,15" but not identical to
* "^8,0-15".
*
* Note that OSes (notably Linux) may require vCPU 0 to stay online to support
* low-level features a S3 sleep.
*
* Returns 0 on success, -1 on error.
*/
int
virDomainSetGuestVcpus(virDomainPtr domain,
const char *cpumap,
int state,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(domain, "cpumap='%s' state=%x flags=%x",
NULLSTR(cpumap), state, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckReadOnlyGoto(domain->conn->flags, error);
virCheckNonNullArgGoto(cpumap, error);
if (domain->conn->driver->domainSetGuestVcpus) {
int ret;
ret = domain->conn->driver->domainSetGuestVcpus(domain, cpumap, state,
flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSetVcpu:
* @domain: pointer to domain object
* @vcpumap: text representation of a bitmap of vcpus to set
* @state: 0 to disable/1 to enable cpus described by @vcpumap
* @flags: bitwise-OR of virDomainModificationImpact
*
* Enables/disables individual vcpus described by @vcpumap in the hypervisor.
*
* Various hypervisor implementations may limit to operate on just 1
* hotpluggable entity (which may contain multiple vCPUs on certain platforms).
*
* Note that OSes and hypervisors may require vCPU 0 to stay online.
*
* Returns 0 on success, -1 on error.
*/
int
virDomainSetVcpu(virDomainPtr domain,
const char *vcpumap,
int state,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(domain, "vcpumap='%s' state=%i flags=%x",
NULLSTR(vcpumap), state, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckReadOnlyGoto(domain->conn->flags, error);
virCheckNonNullArgGoto(vcpumap, error);
if (domain->conn->driver->domainSetVcpu) {
int ret;
ret = domain->conn->driver->domainSetVcpu(domain, vcpumap, state, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainSetBlockThreshold:
* @domain: pointer to domain object
* @dev: string specifying the block device or backing chain element
* @threshold: threshold in bytes when to fire the event
* @flags: currently unused, callers should pass 0
*
* Set the threshold level for delivering the
* VIR_DOMAIN_EVENT_ID_BLOCK_THRESHOLD if the device or backing chain element
* described by @dev is written beyond the set threshold level. The threshold
* level is unset once the event fires. The event might not be delivered at all
* if libvirtd was not running at the moment when the threshold was reached.
*
* Hypervisors report the last written sector of an image in the bulk stats API
* (virConnectGetAllDomainStats/virDomainListGetStats) as
* "block.<num>.allocation" in the VIR_DOMAIN_STATS_BLOCK group. The current
* threshold value is reported as "block.<num>.threshold".
*
* This event allows to use thin-provisioned storage which needs management
* tools to grow it without the need for polling of the data.
*
* Returns 0 if the operation has started, -1 on failure.
*/
int
virDomainSetBlockThreshold(virDomainPtr domain,
const char *dev,
unsigned long long threshold,
unsigned int flags)
{
VIR_DOMAIN_DEBUG(domain, "dev='%s' threshold=%llu flags=%x",
NULLSTR(dev), threshold, flags);
virResetLastError();
virCheckDomainReturn(domain, -1);
virCheckReadOnlyGoto(domain->conn->flags, error);
virCheckNonNullArgGoto(dev, error);
if (domain->conn->driver->domainSetBlockThreshold) {
int ret;
ret = domain->conn->driver->domainSetBlockThreshold(domain, dev,
threshold, flags);
if (ret < 0)
goto error;
return ret;
}
virReportUnsupportedError();
error:
virDispatchError(domain->conn);
return -1;
}
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