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libxl: Set def->vcpus after successfully modifying live vcpu count

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def->vcpus was never updated after successfully changing the live
vcpu count of a domain. Subsequent queries for vcpu info would
return incorrect results.  E.g.:

virsh vcpucount test
maximum      config         4
maximum      live           4
current      config         4
current      live           4

virsh setvcpus test 2

virsh vcpucount test
maximum      config         4
maximum      live           4
current      config         4
current      live           4

After patch, live current config is reported correctly:

virsh vcpucount test
maximum      config         4
maximum      live           4
current      config         4
current      live           2

While fixing this, noticed that the live config was not saved
to cfg->stateDir via virDomainSaveStatus. Save the live config
and change error handling of virDomainSave{Config,Status} to
log a message via VIR_WARN, instead of failing the entire
DomainSetVcpusFlags operation.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
This commit is contained in:
Jim Fehlig 2015-06-29 10:46:36 -06:00
parent 33be48d78e
commit 04597f8f0d
1 changed files with 14 additions and 2 deletions
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16
src/libxl/libxl_driver.c
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@ -2101,6 +2101,7 @@ libxlDomainSetVcpusFlags(virDomainPtr dom, unsigned int nvcpus,
" with libxenlight"), vm->def->id);
goto endjob;
}
vm->def->vcpus = nvcpus;
break;
case VIR_DOMAIN_VCPU_LIVE | VIR_DOMAIN_VCPU_CONFIG:
@ -2110,14 +2111,25 @@ libxlDomainSetVcpusFlags(virDomainPtr dom, unsigned int nvcpus,
" with libxenlight"), vm->def->id);
goto endjob;
}
vm->def->vcpus = nvcpus;
def->vcpus = nvcpus;
break;
}
ret = 0;
if (flags & VIR_DOMAIN_VCPU_CONFIG)
ret = virDomainSaveConfig(cfg->configDir, def);
if (flags & VIR_DOMAIN_VCPU_LIVE) {
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0) {
VIR_WARN("Unable to save status on vm %s after changing vcpus",
vm->def->name);
}
}
if (flags & VIR_DOMAIN_VCPU_CONFIG) {
if (virDomainSaveConfig(cfg->configDir, def) < 0) {
VIR_WARN("Unable to save configuration of vm %s after changing vcpus",
vm->def->name);
}
}
endjob:
if (!libxlDomainObjEndJob(driver, vm))