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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>
139 lines
5.4 KiB
C
139 lines
5.4 KiB
C
/*
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* qemu_process.h: QEMU process management
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*
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* Copyright (C) 2006-2012, 2015 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_PROCESS_H__
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# define __QEMU_PROCESS_H__
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# include "qemu_conf.h"
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# include "qemu_domain.h"
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int qemuProcessPrepareMonitorChr(virQEMUDriverConfigPtr cfg,
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virDomainChrSourceDefPtr monConfig,
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const char *vm);
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int qemuProcessStartCPUs(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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virConnectPtr conn,
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virDomainRunningReason reason,
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qemuDomainAsyncJob asyncJob);
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int qemuProcessStopCPUs(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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virDomainPausedReason reason,
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qemuDomainAsyncJob asyncJob);
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void qemuProcessAutostartAll(virQEMUDriverPtr driver);
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void qemuProcessReconnectAll(virConnectPtr conn, virQEMUDriverPtr driver);
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int qemuProcessAssignPCIAddresses(virDomainDefPtr def);
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typedef struct _qemuProcessIncomingDef qemuProcessIncomingDef;
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typedef qemuProcessIncomingDef *qemuProcessIncomingDefPtr;
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struct _qemuProcessIncomingDef {
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char *launchURI; /* used as a parameter for -incoming command line option */
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char *deferredURI; /* used when calling migrate-incoming QMP command */
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int fd; /* for fd:N URI */
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const char *path; /* path associated with fd */
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};
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qemuProcessIncomingDefPtr qemuProcessIncomingDefNew(virQEMUCapsPtr qemuCaps,
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const char *migrateFrom,
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int fd,
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const char *path);
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void qemuProcessIncomingDefFree(qemuProcessIncomingDefPtr inc);
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int qemuProcessBeginJob(virQEMUDriverPtr driver,
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virDomainObjPtr vm);
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void qemuProcessEndJob(virQEMUDriverPtr driver,
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virDomainObjPtr vm);
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typedef enum {
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VIR_QEMU_PROCESS_START_COLD = 1 << 0,
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VIR_QEMU_PROCESS_START_PAUSED = 1 << 1,
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VIR_QEMU_PROCESS_START_AUTODESTROY = 1 << 2,
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} qemuProcessStartFlags;
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int qemuProcessStart(virConnectPtr conn,
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virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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qemuDomainAsyncJob asyncJob,
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const char *migrateFrom,
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int stdin_fd,
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const char *stdin_path,
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virDomainSnapshotObjPtr snapshot,
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virNetDevVPortProfileOp vmop,
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unsigned int flags);
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typedef enum {
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VIR_QEMU_PROCESS_STOP_MIGRATED = 1 << 0,
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VIR_QEMU_PROCESS_STOP_NO_RELABEL = 1 << 1,
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} qemuProcessStopFlags;
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void qemuProcessStop(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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virDomainShutoffReason reason,
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unsigned int flags);
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int qemuProcessAttach(virConnectPtr conn,
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virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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pid_t pid,
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const char *pidfile,
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virDomainChrSourceDefPtr monConfig,
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bool monJSON);
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typedef enum {
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VIR_QEMU_PROCESS_KILL_FORCE = 1 << 0,
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VIR_QEMU_PROCESS_KILL_NOWAIT = 1 << 1,
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VIR_QEMU_PROCESS_KILL_NOCHECK = 1 << 2, /* bypass the running vm check */
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} virQemuProcessKillMode;
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int qemuProcessKill(virDomainObjPtr vm, unsigned int flags);
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void qemuProcessShutdownOrReboot(virQEMUDriverPtr driver,
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virDomainObjPtr vm);
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int qemuProcessAutoDestroyInit(virQEMUDriverPtr driver);
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void qemuProcessAutoDestroyShutdown(virQEMUDriverPtr driver);
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int qemuProcessAutoDestroyAdd(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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virConnectPtr conn);
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int qemuProcessAutoDestroyRemove(virQEMUDriverPtr driver,
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virDomainObjPtr vm);
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bool qemuProcessAutoDestroyActive(virQEMUDriverPtr driver,
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virDomainObjPtr vm);
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int qemuProcessReadLog(int fd, char *buf, int buflen, int off, bool skipchar);
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int qemuProcessSetSchedParams(int id, pid_t pid, size_t nsp,
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virDomainThreadSchedParamPtr sp);
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int qemuProcessSPICEAllocatePorts(virQEMUDriverPtr driver,
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virQEMUDriverConfigPtr cfg,
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virDomainGraphicsDefPtr graphics,
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bool allocate);
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virDomainDiskDefPtr qemuProcessFindDomainDiskByAlias(virDomainObjPtr vm,
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const char *alias);
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int qemuConnectAgent(virQEMUDriverPtr driver, virDomainObjPtr vm);
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#endif /* __QEMU_PROCESS_H__ */
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