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Traditionally, we pass incoming migration URI on QEMU command line, which has some drawbacks. Depending on the URI QEMU may initialize its migration state immediately without giving us a chance to set any additional migration parameters (this applies mainly for fd: URIs). For some URIs the monitor may be completely blocked from the beginning until migration is finished, which means we may be stuck in qmp_capabilities command without being able to send any QMP commands. QEMU solved this by introducing "defer" parameter for -incoming command line option. This will tell QEMU to prepare for an incoming migration while the actual incoming URI is sent using migrate-incoming QMP command. Before calling this command we can normally talk to the monitor and even set any migration parameters which will be honored by the incoming migration. Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
214 lines
8.9 KiB
C
214 lines
8.9 KiB
C
/*
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* qemu_migration.h: QEMU migration handling
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*
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* Copyright (C) 2006-2011, 2014 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef __QEMU_MIGRATION_H__
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# define __QEMU_MIGRATION_H__
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# include "qemu_conf.h"
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# include "qemu_domain.h"
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/* All supported qemu migration flags. */
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# define QEMU_MIGRATION_FLAGS \
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(VIR_MIGRATE_LIVE | \
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VIR_MIGRATE_PEER2PEER | \
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VIR_MIGRATE_TUNNELLED | \
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VIR_MIGRATE_PERSIST_DEST | \
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VIR_MIGRATE_UNDEFINE_SOURCE | \
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VIR_MIGRATE_PAUSED | \
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VIR_MIGRATE_NON_SHARED_DISK | \
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VIR_MIGRATE_NON_SHARED_INC | \
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VIR_MIGRATE_CHANGE_PROTECTION | \
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VIR_MIGRATE_UNSAFE | \
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VIR_MIGRATE_OFFLINE | \
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VIR_MIGRATE_COMPRESSED | \
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VIR_MIGRATE_ABORT_ON_ERROR | \
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VIR_MIGRATE_AUTO_CONVERGE | \
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VIR_MIGRATE_RDMA_PIN_ALL)
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/* All supported migration parameters and their types. */
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# define QEMU_MIGRATION_PARAMETERS \
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VIR_MIGRATE_PARAM_URI, VIR_TYPED_PARAM_STRING, \
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VIR_MIGRATE_PARAM_DEST_NAME, VIR_TYPED_PARAM_STRING, \
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VIR_MIGRATE_PARAM_DEST_XML, VIR_TYPED_PARAM_STRING, \
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VIR_MIGRATE_PARAM_BANDWIDTH, VIR_TYPED_PARAM_ULLONG, \
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VIR_MIGRATE_PARAM_GRAPHICS_URI, VIR_TYPED_PARAM_STRING, \
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VIR_MIGRATE_PARAM_LISTEN_ADDRESS, VIR_TYPED_PARAM_STRING, \
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VIR_MIGRATE_PARAM_MIGRATE_DISKS, VIR_TYPED_PARAM_STRING | \
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VIR_TYPED_PARAM_MULTIPLE, \
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NULL
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typedef enum {
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QEMU_MIGRATION_PHASE_NONE = 0,
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QEMU_MIGRATION_PHASE_PERFORM2,
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QEMU_MIGRATION_PHASE_BEGIN3,
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QEMU_MIGRATION_PHASE_PERFORM3,
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QEMU_MIGRATION_PHASE_PERFORM3_DONE,
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QEMU_MIGRATION_PHASE_CONFIRM3_CANCELLED,
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QEMU_MIGRATION_PHASE_CONFIRM3,
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QEMU_MIGRATION_PHASE_PREPARE,
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QEMU_MIGRATION_PHASE_FINISH2,
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QEMU_MIGRATION_PHASE_FINISH3,
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QEMU_MIGRATION_PHASE_LAST
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} qemuMigrationJobPhase;
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VIR_ENUM_DECL(qemuMigrationJobPhase)
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int qemuMigrationJobStart(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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qemuDomainAsyncJob job)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
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void qemuMigrationJobSetPhase(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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qemuMigrationJobPhase phase)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
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void qemuMigrationJobStartPhase(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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qemuMigrationJobPhase phase)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
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void qemuMigrationJobContinue(virDomainObjPtr obj)
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ATTRIBUTE_NONNULL(1);
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bool qemuMigrationJobIsActive(virDomainObjPtr vm,
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qemuDomainAsyncJob job)
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ATTRIBUTE_NONNULL(1);
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void qemuMigrationJobFinish(virQEMUDriverPtr driver, virDomainObjPtr obj)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
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int qemuMigrationSetOffline(virQEMUDriverPtr driver,
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virDomainObjPtr vm);
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char *qemuMigrationBegin(virConnectPtr conn,
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virDomainObjPtr vm,
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const char *xmlin,
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const char *dname,
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char **cookieout,
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int *cookieoutlen,
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size_t nmigrate_disks,
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const char **migrate_disks,
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unsigned long flags);
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virDomainDefPtr qemuMigrationPrepareDef(virQEMUDriverPtr driver,
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const char *dom_xml,
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const char *dname,
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char **origname);
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int qemuMigrationPrepareTunnel(virQEMUDriverPtr driver,
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virConnectPtr dconn,
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const char *cookiein,
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int cookieinlen,
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char **cookieout,
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int *cookieoutlen,
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virStreamPtr st,
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virDomainDefPtr *def,
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const char *origname,
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unsigned long flags);
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int qemuMigrationPrepareDirect(virQEMUDriverPtr driver,
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virConnectPtr dconn,
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const char *cookiein,
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int cookieinlen,
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char **cookieout,
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int *cookieoutlen,
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const char *uri_in,
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char **uri_out,
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virDomainDefPtr *def,
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const char *origname,
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const char *listenAddress,
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size_t nmigrate_disks,
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const char **migrate_disks,
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unsigned long flags);
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int qemuMigrationPerform(virQEMUDriverPtr driver,
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virConnectPtr conn,
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virDomainObjPtr vm,
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const char *xmlin,
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const char *dconnuri,
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const char *uri,
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const char *graphicsuri,
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const char *listenAddress,
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size_t nmigrate_disks,
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const char **migrate_disks,
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const char *cookiein,
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int cookieinlen,
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char **cookieout,
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int *cookieoutlen,
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unsigned long flags,
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const char *dname,
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unsigned long resource,
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bool v3proto);
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virDomainPtr qemuMigrationFinish(virQEMUDriverPtr driver,
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virConnectPtr dconn,
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virDomainObjPtr vm,
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const char *cookiein,
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int cookieinlen,
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char **cookieout,
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int *cookieoutlen,
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unsigned long flags,
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int retcode,
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bool v3proto);
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int qemuMigrationConfirm(virConnectPtr conn,
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virDomainObjPtr vm,
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const char *cookiein,
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int cookieinlen,
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unsigned int flags,
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int cancelled);
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bool qemuMigrationIsAllowed(virQEMUDriverPtr driver, virDomainObjPtr vm,
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bool remote, unsigned int flags);
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int qemuMigrationToFile(virQEMUDriverPtr driver, virDomainObjPtr vm,
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int fd, off_t offset, const char *path,
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const char *compressor,
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bool bypassSecurityDriver,
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qemuDomainAsyncJob asyncJob)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(5)
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ATTRIBUTE_RETURN_CHECK;
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int qemuMigrationCancel(virQEMUDriverPtr driver,
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virDomainObjPtr vm);
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int qemuMigrationFetchJobStatus(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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qemuDomainAsyncJob asyncJob,
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qemuDomainJobInfoPtr jobInfo);
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int qemuMigrationErrorInit(virQEMUDriverPtr driver);
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void qemuMigrationErrorSave(virQEMUDriverPtr driver,
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const char *name,
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virErrorPtr err);
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void qemuMigrationErrorReport(virQEMUDriverPtr driver,
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const char *name);
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int qemuMigrationCheckIncoming(virQEMUCapsPtr qemuCaps,
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const char *migrateFrom);
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char *qemuMigrationIncomingURI(const char *migrateFrom,
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int migrateFd);
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int qemuMigrationRunIncoming(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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const char *uri,
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qemuDomainAsyncJob asyncJob);
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#endif /* __QEMU_MIGRATION_H__ */
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