2011-02-14 16:09:39 +00:00
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/*
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2013-07-26 12:24:55 +00:00
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* qemu_process.h: QEMU process management
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2011-02-14 16:09:39 +00:00
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*
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qemu: new GRACEFUL flag for virDomainDestroy w/ QEMU support
When libvirt's virDomainDestroy API is shutting down the qemu process,
it first sends SIGTERM, then waits for 1.6 seconds and, if it sees the
process still there, sends a SIGKILL.
There have been reports that this behavior can lead to data loss
because the guest running in qemu doesn't have time to flush its disk
cache buffers before it's unceremoniously whacked.
This patch maintains that default behavior, but provides a new flag
VIR_DOMAIN_DESTROY_GRACEFUL to alter the behavior. If this flag is set
in the call to virDomainDestroyFlags, SIGKILL will never be sent to
the qemu process; instead, if the timeout is reached and the qemu
process still exists, virDomainDestroy will return an error.
Once this patch is in, the recommended method for applications to call
virDomainDestroyFlags will be with VIR_DOMAIN_DESTROY_GRACEFUL
included. If that fails, then the application can decide if and when
to call virDomainDestroyFlags again without
VIR_DOMAIN_DESTROY_GRACEFUL (to force the issue with SIGKILL).
(Note that this does not address the issue of existing applications
that have not yet been modified to use VIR_DOMAIN_DESTROY_GRACEFUL.
That is a separate patch.)
2012-01-27 18:28:23 +00:00
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* Copyright (C) 2006-2012 Red Hat, Inc.
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2011-02-14 16:09:39 +00:00
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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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2012-09-20 22:30:55 +00:00
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* License along with this library. If not, see
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2012-07-21 10:06:23 +00:00
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* <http://www.gnu.org/licenses/>.
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2011-02-14 16:09:39 +00:00
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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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qemu: fix crash when mixing sync and async monitor jobs
Currently, we attempt to run sync job and async job at the same time. It
means that the monitor commands for two jobs can be run in any order.
In the function qemuDomainObjEnterMonitorInternal():
if (priv->job.active == QEMU_JOB_NONE && priv->job.asyncJob) {
if (qemuDomainObjBeginNestedJob(driver, obj) < 0)
We check whether the caller is an async job by priv->job.active and
priv->job.asynJob. But when an async job is running, and a sync job is
also running at the time of the check, then priv->job.active is not
QEMU_JOB_NONE. So we cannot check whether the caller is an async job
in the function qemuDomainObjEnterMonitorInternal(), and must instead
put the burden on the caller to tell us when an async command wants
to do a nested job.
Once the burden is on the caller, then only async monitor enters need
to worry about whether the VM is still running; for sync monitor enter,
the internal return is always 0, so lots of ignore_value can be dropped.
* src/qemu/THREADS.txt: Reflect new rules.
* src/qemu/qemu_domain.h (qemuDomainObjEnterMonitorAsync): New
prototype.
* src/qemu/qemu_process.h (qemuProcessStartCPUs)
(qemuProcessStopCPUs): Add parameter.
* src/qemu/qemu_migration.h (qemuMigrationToFile): Likewise.
(qemuMigrationWaitForCompletion): Make static.
* src/qemu/qemu_domain.c (qemuDomainObjEnterMonitorInternal): Add
parameter.
(qemuDomainObjEnterMonitorAsync): New function.
(qemuDomainObjEnterMonitor, qemuDomainObjEnterMonitorWithDriver):
Update callers.
* src/qemu/qemu_driver.c (qemuDomainSaveInternal)
(qemudDomainCoreDump, doCoreDump, processWatchdogEvent)
(qemudDomainSuspend, qemudDomainResume, qemuDomainSaveImageStartVM)
(qemuDomainSnapshotCreateActive, qemuDomainRevertToSnapshot):
Likewise.
* src/qemu/qemu_process.c (qemuProcessStopCPUs)
(qemuProcessFakeReboot, qemuProcessRecoverMigration)
(qemuProcessRecoverJob, qemuProcessStart): Likewise.
* src/qemu/qemu_migration.c (qemuMigrationToFile)
(qemuMigrationWaitForCompletion, qemuMigrationUpdateJobStatus)
(qemuMigrationJobStart, qemuDomainMigrateGraphicsRelocate)
(doNativeMigrate, doTunnelMigrate, qemuMigrationPerformJob)
(qemuMigrationPerformPhase, qemuMigrationFinish)
(qemuMigrationConfirm): Likewise.
* src/qemu/qemu_hotplug.c: Drop unneeded ignore_value.
2011-07-28 23:18:24 +00:00
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# include "qemu_domain.h"
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2011-02-14 16:09:39 +00:00
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2013-01-10 21:03:14 +00:00
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int qemuProcessPrepareMonitorChr(virQEMUDriverConfigPtr cfg,
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2011-02-14 16:09:39 +00:00
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virDomainChrSourceDefPtr monConfig,
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const char *vm);
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2012-11-28 16:43:10 +00:00
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int qemuProcessStartCPUs(virQEMUDriverPtr driver,
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2011-05-04 09:07:01 +00:00
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virDomainObjPtr vm,
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virConnectPtr conn,
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qemu: fix crash when mixing sync and async monitor jobs
Currently, we attempt to run sync job and async job at the same time. It
means that the monitor commands for two jobs can be run in any order.
In the function qemuDomainObjEnterMonitorInternal():
if (priv->job.active == QEMU_JOB_NONE && priv->job.asyncJob) {
if (qemuDomainObjBeginNestedJob(driver, obj) < 0)
We check whether the caller is an async job by priv->job.active and
priv->job.asynJob. But when an async job is running, and a sync job is
also running at the time of the check, then priv->job.active is not
QEMU_JOB_NONE. So we cannot check whether the caller is an async job
in the function qemuDomainObjEnterMonitorInternal(), and must instead
put the burden on the caller to tell us when an async command wants
to do a nested job.
Once the burden is on the caller, then only async monitor enters need
to worry about whether the VM is still running; for sync monitor enter,
the internal return is always 0, so lots of ignore_value can be dropped.
* src/qemu/THREADS.txt: Reflect new rules.
* src/qemu/qemu_domain.h (qemuDomainObjEnterMonitorAsync): New
prototype.
* src/qemu/qemu_process.h (qemuProcessStartCPUs)
(qemuProcessStopCPUs): Add parameter.
* src/qemu/qemu_migration.h (qemuMigrationToFile): Likewise.
(qemuMigrationWaitForCompletion): Make static.
* src/qemu/qemu_domain.c (qemuDomainObjEnterMonitorInternal): Add
parameter.
(qemuDomainObjEnterMonitorAsync): New function.
(qemuDomainObjEnterMonitor, qemuDomainObjEnterMonitorWithDriver):
Update callers.
* src/qemu/qemu_driver.c (qemuDomainSaveInternal)
(qemudDomainCoreDump, doCoreDump, processWatchdogEvent)
(qemudDomainSuspend, qemudDomainResume, qemuDomainSaveImageStartVM)
(qemuDomainSnapshotCreateActive, qemuDomainRevertToSnapshot):
Likewise.
* src/qemu/qemu_process.c (qemuProcessStopCPUs)
(qemuProcessFakeReboot, qemuProcessRecoverMigration)
(qemuProcessRecoverJob, qemuProcessStart): Likewise.
* src/qemu/qemu_migration.c (qemuMigrationToFile)
(qemuMigrationWaitForCompletion, qemuMigrationUpdateJobStatus)
(qemuMigrationJobStart, qemuDomainMigrateGraphicsRelocate)
(doNativeMigrate, doTunnelMigrate, qemuMigrationPerformJob)
(qemuMigrationPerformPhase, qemuMigrationFinish)
(qemuMigrationConfirm): Likewise.
* src/qemu/qemu_hotplug.c: Drop unneeded ignore_value.
2011-07-28 23:18:24 +00:00
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virDomainRunningReason reason,
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enum qemuDomainAsyncJob asyncJob);
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2012-11-28 16:43:10 +00:00
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int qemuProcessStopCPUs(virQEMUDriverPtr driver,
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2011-05-04 09:07:01 +00:00
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virDomainObjPtr vm,
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qemu: fix crash when mixing sync and async monitor jobs
Currently, we attempt to run sync job and async job at the same time. It
means that the monitor commands for two jobs can be run in any order.
In the function qemuDomainObjEnterMonitorInternal():
if (priv->job.active == QEMU_JOB_NONE && priv->job.asyncJob) {
if (qemuDomainObjBeginNestedJob(driver, obj) < 0)
We check whether the caller is an async job by priv->job.active and
priv->job.asynJob. But when an async job is running, and a sync job is
also running at the time of the check, then priv->job.active is not
QEMU_JOB_NONE. So we cannot check whether the caller is an async job
in the function qemuDomainObjEnterMonitorInternal(), and must instead
put the burden on the caller to tell us when an async command wants
to do a nested job.
Once the burden is on the caller, then only async monitor enters need
to worry about whether the VM is still running; for sync monitor enter,
the internal return is always 0, so lots of ignore_value can be dropped.
* src/qemu/THREADS.txt: Reflect new rules.
* src/qemu/qemu_domain.h (qemuDomainObjEnterMonitorAsync): New
prototype.
* src/qemu/qemu_process.h (qemuProcessStartCPUs)
(qemuProcessStopCPUs): Add parameter.
* src/qemu/qemu_migration.h (qemuMigrationToFile): Likewise.
(qemuMigrationWaitForCompletion): Make static.
* src/qemu/qemu_domain.c (qemuDomainObjEnterMonitorInternal): Add
parameter.
(qemuDomainObjEnterMonitorAsync): New function.
(qemuDomainObjEnterMonitor, qemuDomainObjEnterMonitorWithDriver):
Update callers.
* src/qemu/qemu_driver.c (qemuDomainSaveInternal)
(qemudDomainCoreDump, doCoreDump, processWatchdogEvent)
(qemudDomainSuspend, qemudDomainResume, qemuDomainSaveImageStartVM)
(qemuDomainSnapshotCreateActive, qemuDomainRevertToSnapshot):
Likewise.
* src/qemu/qemu_process.c (qemuProcessStopCPUs)
(qemuProcessFakeReboot, qemuProcessRecoverMigration)
(qemuProcessRecoverJob, qemuProcessStart): Likewise.
* src/qemu/qemu_migration.c (qemuMigrationToFile)
(qemuMigrationWaitForCompletion, qemuMigrationUpdateJobStatus)
(qemuMigrationJobStart, qemuDomainMigrateGraphicsRelocate)
(doNativeMigrate, doTunnelMigrate, qemuMigrationPerformJob)
(qemuMigrationPerformPhase, qemuMigrationFinish)
(qemuMigrationConfirm): Likewise.
* src/qemu/qemu_hotplug.c: Drop unneeded ignore_value.
2011-07-28 23:18:24 +00:00
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virDomainPausedReason reason,
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enum qemuDomainAsyncJob asyncJob);
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2011-02-14 16:09:39 +00:00
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2012-11-28 16:43:10 +00:00
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void qemuProcessAutostartAll(virQEMUDriverPtr driver);
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void qemuProcessReconnectAll(virConnectPtr conn, virQEMUDriverPtr driver);
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2011-02-14 16:09:39 +00:00
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int qemuProcessAssignPCIAddresses(virDomainDefPtr def);
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2012-03-08 13:20:19 +00:00
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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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2013-02-27 16:53:08 +00:00
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VIR_QEMU_PROCESS_START_AUTODESTROY = 1 << 2,
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2012-03-08 13:20:19 +00:00
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} qemuProcessStartFlags;
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2011-02-14 16:09:39 +00:00
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int qemuProcessStart(virConnectPtr conn,
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2012-11-28 16:43:10 +00:00
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virQEMUDriverPtr driver,
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2011-02-14 16:09:39 +00:00
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virDomainObjPtr vm,
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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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2011-08-25 20:44:48 +00:00
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virDomainSnapshotObjPtr snapshot,
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2012-03-08 13:20:19 +00:00
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enum virNetDevVPortProfileOp vmop,
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unsigned int flags);
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2011-02-14 16:09:39 +00:00
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2012-06-11 13:20:44 +00:00
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typedef enum {
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2012-06-11 13:57:19 +00:00
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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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2012-06-11 13:20:44 +00:00
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} qemuProcessStopFlags;
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2012-11-28 16:43:10 +00:00
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void qemuProcessStop(virQEMUDriverPtr driver,
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2011-02-14 16:09:39 +00:00
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virDomainObjPtr vm,
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2012-06-11 13:20:44 +00:00
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virDomainShutoffReason reason,
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unsigned int flags);
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2011-02-14 16:09:39 +00:00
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2011-05-05 16:32:21 +00:00
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int qemuProcessAttach(virConnectPtr conn,
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2012-11-28 16:43:10 +00:00
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virQEMUDriverPtr driver,
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2011-05-05 16:32:21 +00:00
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virDomainObjPtr vm,
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build: use correct type for pid and similar types
No thanks to 64-bit windows, with 64-bit pid_t, we have to avoid
constructs like 'int pid'. Our API in libvirt-qemu cannot be
changed without breaking ABI; but then again, libvirt-qemu can
only be used on systems that support UNIX sockets, which rules
out Windows (even if qemu could be compiled there) - so for all
points on the call chain that interact with this API decision,
we require a different variable name to make it clear that we
audited the use for safety.
Adding a syntax-check rule only solves half the battle; anywhere
that uses printf on a pid_t still needs to be converted, but that
will be a separate patch.
* cfg.mk (sc_correct_id_types): New syntax check.
* src/libvirt-qemu.c (virDomainQemuAttach): Document why we didn't
use pid_t for pid, and validate for overflow.
* include/libvirt/libvirt-qemu.h (virDomainQemuAttach): Tweak name
for syntax check.
* src/vmware/vmware_conf.c (vmwareExtractPid): Likewise.
* src/driver.h (virDrvDomainQemuAttach): Likewise.
* tools/virsh.c (cmdQemuAttach): Likewise.
* src/remote/qemu_protocol.x (qemu_domain_attach_args): Likewise.
* src/qemu_protocol-structs (qemu_domain_attach_args): Likewise.
* src/util/cgroup.c (virCgroupPidCode, virCgroupKillInternal):
Likewise.
* src/qemu/qemu_command.c(qemuParseProcFileStrings): Likewise.
(qemuParseCommandLinePid): Use pid_t for pid.
* daemon/libvirtd.c (daemonForkIntoBackground): Likewise.
* src/conf/domain_conf.h (_virDomainObj): Likewise.
* src/probes.d (rpc_socket_new): Likewise.
* src/qemu/qemu_command.h (qemuParseCommandLinePid): Likewise.
* src/qemu/qemu_driver.c (qemudGetProcessInfo, qemuDomainAttach):
Likewise.
* src/qemu/qemu_process.c (qemuProcessAttach): Likewise.
* src/qemu/qemu_process.h (qemuProcessAttach): Likewise.
* src/uml/uml_driver.c (umlGetProcessInfo): Likewise.
* src/util/virnetdev.h (virNetDevSetNamespace): Likewise.
* src/util/virnetdev.c (virNetDevSetNamespace): Likewise.
* tests/testutils.c (virtTestCaptureProgramOutput): Likewise.
* src/conf/storage_conf.h (_virStoragePerms): Use mode_t, uid_t,
and gid_t rather than int.
* src/security/security_dac.c (virSecurityDACSetOwnership): Likewise.
* src/conf/storage_conf.c (virStorageDefParsePerms): Avoid
compiler warning.
2012-02-10 23:08:11 +00:00
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pid_t pid,
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2011-05-05 16:32:21 +00:00
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const char *pidfile,
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virDomainChrSourceDefPtr monConfig,
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bool monJSON);
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qemu: new GRACEFUL flag for virDomainDestroy w/ QEMU support
When libvirt's virDomainDestroy API is shutting down the qemu process,
it first sends SIGTERM, then waits for 1.6 seconds and, if it sees the
process still there, sends a SIGKILL.
There have been reports that this behavior can lead to data loss
because the guest running in qemu doesn't have time to flush its disk
cache buffers before it's unceremoniously whacked.
This patch maintains that default behavior, but provides a new flag
VIR_DOMAIN_DESTROY_GRACEFUL to alter the behavior. If this flag is set
in the call to virDomainDestroyFlags, SIGKILL will never be sent to
the qemu process; instead, if the timeout is reached and the qemu
process still exists, virDomainDestroy will return an error.
Once this patch is in, the recommended method for applications to call
virDomainDestroyFlags will be with VIR_DOMAIN_DESTROY_GRACEFUL
included. If that fails, then the application can decide if and when
to call virDomainDestroyFlags again without
VIR_DOMAIN_DESTROY_GRACEFUL (to force the issue with SIGKILL).
(Note that this does not address the issue of existing applications
that have not yet been modified to use VIR_DOMAIN_DESTROY_GRACEFUL.
That is a separate patch.)
2012-01-27 18:28:23 +00:00
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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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2012-03-30 06:21:49 +00:00
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VIR_QEMU_PROCESS_KILL_NOCHECK = 1 << 2, /* bypass the running vm check */
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qemu: new GRACEFUL flag for virDomainDestroy w/ QEMU support
When libvirt's virDomainDestroy API is shutting down the qemu process,
it first sends SIGTERM, then waits for 1.6 seconds and, if it sees the
process still there, sends a SIGKILL.
There have been reports that this behavior can lead to data loss
because the guest running in qemu doesn't have time to flush its disk
cache buffers before it's unceremoniously whacked.
This patch maintains that default behavior, but provides a new flag
VIR_DOMAIN_DESTROY_GRACEFUL to alter the behavior. If this flag is set
in the call to virDomainDestroyFlags, SIGKILL will never be sent to
the qemu process; instead, if the timeout is reached and the qemu
process still exists, virDomainDestroy will return an error.
Once this patch is in, the recommended method for applications to call
virDomainDestroyFlags will be with VIR_DOMAIN_DESTROY_GRACEFUL
included. If that fails, then the application can decide if and when
to call virDomainDestroyFlags again without
VIR_DOMAIN_DESTROY_GRACEFUL (to force the issue with SIGKILL).
(Note that this does not address the issue of existing applications
that have not yet been modified to use VIR_DOMAIN_DESTROY_GRACEFUL.
That is a separate patch.)
2012-01-27 18:28:23 +00:00
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} virQemuProcessKillMode;
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2013-02-06 18:17:20 +00:00
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int qemuProcessKill(virDomainObjPtr vm, unsigned int flags);
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2011-04-21 15:19:06 +00:00
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2013-06-07 10:23:33 +00:00
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void qemuProcessShutdownOrReboot(virQEMUDriverPtr driver,
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virDomainObjPtr vm);
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2012-11-28 16:43:10 +00:00
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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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2011-06-23 09:37:57 +00:00
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virDomainObjPtr vm,
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virConnectPtr conn);
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2012-11-28 16:43:10 +00:00
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int qemuProcessAutoDestroyRemove(virQEMUDriverPtr driver,
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2011-06-23 09:37:57 +00:00
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virDomainObjPtr vm);
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2012-11-28 16:43:10 +00:00
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bool qemuProcessAutoDestroyActive(virQEMUDriverPtr driver,
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2011-06-23 10:41:57 +00:00
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virDomainObjPtr vm);
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2012-11-28 16:43:10 +00:00
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virBitmapPtr qemuPrepareCpumap(virQEMUDriverPtr driver,
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2012-10-24 09:22:52 +00:00
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virBitmapPtr nodemask);
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2011-06-23 09:37:57 +00:00
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2013-09-18 12:43:52 +00:00
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int qemuProcessReadLog(int fd, char *buf, int buflen, int off, bool skipchar);
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2011-02-14 16:09:39 +00:00
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#endif /* __QEMU_PROCESS_H__ */
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