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Libvirt provides a portable, long term stable C API for managing the
virtualization technologies provided by many operating systems. It
includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware
vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER
Hypervisor.
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. |
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.gnulib@41a7841a82 | ||
daemon | ||
docs | ||
examples | ||
gnulib | ||
include | ||
m4 | ||
po | ||
python | ||
src | ||
tests | ||
tools | ||
.dir-locals.el | ||
.gitignore | ||
.gitmodules | ||
.mailmap | ||
AUTHORS | ||
autobuild.sh | ||
autogen.sh | ||
bootstrap | ||
bootstrap.conf | ||
cfg.mk | ||
ChangeLog-old | ||
configure.ac | ||
COPYING.LIB | ||
HACKING | ||
libvirt.pc.in | ||
libvirt.spec.in | ||
Makefile.am | ||
Makefile.nonreentrant | ||
mingw32-libvirt.spec.in | ||
README | ||
README-hacking | ||
TODO |
LibVirt : simple API for virtualization Libvirt is a C toolkit to interact with the virtualization capabilities of recent versions of Linux (and other OSes). It is free software available under the GNU Lesser General Public License. Virtualization of the Linux Operating System means the ability to run multiple instances of Operating Systems concurrently on a single hardware system where the basic resources are driven by a Linux instance. The library aim at providing long term stable C API initially for the Xen paravirtualization but should be able to integrate other virtualization mechanisms if needed. Daniel Veillard <veillard@redhat.com>