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qemu: return -1 on error paths in qemuDomainSaveImageStartVM

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Error paths after sending the event that domain is started written as if ret = -1
which is set at the beginning of the function. It's common idioma to keep 'ret'
equal to -1 until the end of function where it is set to 0. But here we use ret
to keep result of restore operation too and thus breaks the idioma and its users :)

Let's use different variable to hold restore result.

Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
This commit is contained in:
Nikolay Shirokovskiy 2016-02-01 16:28:40 +03:00 committed by Jiri Denemark
parent 6ec319b84f
commit 4a67b044fb
1 changed files with 11 additions and 11 deletions
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22
src/qemu/qemu_driver.c
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@ -6732,6 +6732,7 @@ qemuDomainSaveImageStartVM(virConnectPtr conn,
qemuDomainAsyncJob asyncJob)
{
int ret = -1;
bool restored = false;
virObjectEventPtr event;
int intermediatefd = -1;
virCommandPtr cmd = NULL;
@ -6758,13 +6759,14 @@ qemuDomainSaveImageStartVM(virConnectPtr conn,
}
/* Set the migration source and start it up. */
ret = qemuProcessStart(conn, driver, vm, asyncJob,
"stdio", *fd, path, NULL,
VIR_NETDEV_VPORT_PROFILE_OP_RESTORE,
VIR_QEMU_PROCESS_START_PAUSED);
if (qemuProcessStart(conn, driver, vm, asyncJob,
"stdio", *fd, path, NULL,
VIR_NETDEV_VPORT_PROFILE_OP_RESTORE,
VIR_QEMU_PROCESS_START_PAUSED) == 0)
restored = true;
if (intermediatefd != -1) {
if (ret < 0) {
if (!restored) {
/* if there was an error setting up qemu, the intermediate
* process will wait forever to write to stdout, so we
* must manually kill it.
@ -6775,7 +6777,7 @@ qemuDomainSaveImageStartVM(virConnectPtr conn,
if (virCommandWait(cmd, NULL) < 0) {
qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_FAILED, 0);
ret = -1;
restored = false;
}
VIR_DEBUG("Decompression binary stderr: %s", NULLSTR(errbuf));
}
@ -6783,18 +6785,16 @@ qemuDomainSaveImageStartVM(virConnectPtr conn,
if (VIR_CLOSE(*fd) < 0) {
virReportSystemError(errno, _("cannot close file: %s"), path);
ret = -1;
restored = false;
}
if (ret < 0) {
virDomainAuditStart(vm, "restored", false);
virDomainAuditStart(vm, "restored", restored);
if (!restored)
goto cleanup;
}
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STARTED,
VIR_DOMAIN_EVENT_STARTED_RESTORED);
virDomainAuditStart(vm, "restored", true);
qemuDomainEventQueue(driver, event);