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qemu: hotplug: Extract code for waiting for tray eject

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The code grew rather convoluted. Extract it to a separate function.
This commit is contained in:
Peter Krempa 2016-05-23 14:50:17 +02:00
parent 894dc85fd1
commit 0aa19f35e0
1 changed files with 46 additions and 39 deletions
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85
src/qemu/qemu_hotplug.c
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@ -145,6 +145,40 @@ qemuDomainPrepareDisk(virQEMUDriverPtr driver,
}
static int
qemuHotplugWaitForTrayEject(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainDiskDefPtr disk,
const char *driveAlias,
bool force)
{
unsigned long long now;
int rc;
if (virTimeMillisNow(&now) < 0)
return -1;
while (disk->tray_status != VIR_DOMAIN_DISK_TRAY_OPEN) {
if ((rc = virDomainObjWaitUntil(vm, now + CHANGE_MEDIA_TIMEOUT)) < 0)
return -1;
if (rc > 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("timed out waiting for disk tray status update"));
return -1;
}
}
/* re-issue ejection command to pop out the media */
qemuDomainObjEnterMonitor(driver, vm);
rc = qemuMonitorEjectMedia(qemuDomainGetMonitor(vm), driveAlias, force);
if (qemuDomainObjExitMonitor(driver, vm) < 0 || rc < 0)
return -1;
return 0;
}
/**
* qemuDomainChangeEjectableMedia:
* @driver: qemu driver structure
@ -172,8 +206,6 @@ qemuDomainChangeEjectableMedia(virQEMUDriverPtr driver,
qemuDomainObjPrivatePtr priv = vm->privateData;
const char *format = NULL;
char *sourcestr = NULL;
bool ejectRetry = false;
unsigned long long now;
if (!disk->info.alias) {
virReportError(VIR_ERR_INTERNAL_ERROR,
@ -195,45 +227,20 @@ qemuDomainChangeEjectableMedia(virQEMUDriverPtr driver,
if (!(driveAlias = qemuDeviceDriveHostAlias(disk)))
goto error;
do {
qemuDomainObjEnterMonitor(driver, vm);
rc = qemuMonitorEjectMedia(priv->mon, driveAlias, force);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
goto cleanup;
qemuDomainObjEnterMonitor(driver, vm);
rc = qemuMonitorEjectMedia(priv->mon, driveAlias, force);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
goto cleanup;
/* skip all retrying if qemu doesn't notify us on tray change */
if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DEVICE_TRAY_MOVED)) {
if (rc == 0)
break;
if (rc < 0)
goto error;
}
if (rc < 0) {
/* we've already tried, error out */
if (ejectRetry)
goto error;
ejectRetry = true;
VIR_DEBUG("tray may be locked, wait for the guest to unlock "
"the tray and try to eject it again");
}
if (virTimeMillisNow(&now) < 0)
/* If the tray change event is supported wait for it to open. */
if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DEVICE_TRAY_MOVED)) {
if (qemuHotplugWaitForTrayEject(driver, vm, disk, driveAlias, force) < 0)
goto error;
while (disk->tray_status != VIR_DOMAIN_DISK_TRAY_OPEN) {
int wait_rc = virDomainObjWaitUntil(vm, now + CHANGE_MEDIA_TIMEOUT);
if (wait_rc > 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("timed out waiting for "
"disk tray status update"));
}
if (wait_rc != 0)
goto error;
}
} while (rc < 0);
} else {
/* otherwise report possible errors from the attempt to eject the media*/
if (rc < 0)
goto error;
}
if (!virStorageSourceIsEmpty(newsrc)) {
qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);