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qemu: Remove character device backend only after frontend is gone

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In general, we should only remove a backend after seeing DEVICE_DELETED
event for a corresponding frontend.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
This commit is contained in:
Jiri Denemark 2014-05-27 13:30:04 +02:00
parent 0635785b6e
commit 55b21f9b23
1 changed files with 22 additions and 13 deletions
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35
src/qemu/qemu_hotplug.c
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@ -2742,22 +2742,40 @@ qemuDomainRemoveNetDevice(virQEMUDriverPtr driver,
}
static void
static int
qemuDomainRemoveChrDevice(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainChrDefPtr chr)
{
virObjectEventPtr event;
char *charAlias = NULL;
qemuDomainObjPrivatePtr priv = vm->privateData;
int ret = -1;
VIR_DEBUG("Removing character device %s from domain %p %s",
chr->info.alias, vm, vm->def->name);
if (virAsprintf(&charAlias, "char%s", chr->info.alias) < 0)
goto cleanup;
qemuDomainObjEnterMonitor(driver, vm);
if (qemuMonitorDetachCharDev(priv->mon, charAlias) < 0) {
qemuDomainObjExitMonitor(driver, vm);
goto cleanup;
}
qemuDomainObjExitMonitor(driver, vm);
event = virDomainEventDeviceRemovedNewFromObj(vm, chr->info.alias);
if (event)
qemuDomainEventQueue(driver, event);
qemuDomainChrRemove(vm->def, chr);
virDomainChrDefFree(chr);
ret = 0;
cleanup:
VIR_FREE(charAlias);
return ret;
}
@ -3596,7 +3614,6 @@ int qemuDomainDetachChrDevice(virQEMUDriverPtr driver,
qemuDomainObjPrivatePtr priv = vm->privateData;
virDomainDefPtr vmdef = vm->def;
virDomainChrDefPtr tmpChr;
char *charAlias = NULL;
char *devstr = NULL;
int rc;
@ -3609,9 +3626,6 @@ int qemuDomainDetachChrDevice(virQEMUDriverPtr driver,
if (qemuBuildChrDeviceStr(&devstr, vm->def, chr, priv->qemuCaps) < 0)
return ret;
if (virAsprintf(&charAlias, "char%s", tmpChr->info.alias) < 0)
goto cleanup;
qemuDomainMarkDeviceForRemoval(vm, &tmpChr->info);
qemuDomainObjEnterMonitor(driver, vm);
@ -3619,21 +3633,16 @@ int qemuDomainDetachChrDevice(virQEMUDriverPtr driver,
qemuDomainObjExitMonitor(driver, vm);
goto cleanup;
}
if (qemuMonitorDetachCharDev(priv->mon, charAlias) < 0) {
qemuDomainObjExitMonitor(driver, vm);
goto cleanup;
}
qemuDomainObjExitMonitor(driver, vm);
rc = qemuDomainWaitForDeviceRemoval(vm);
if (rc == 0 || rc == 1)
qemuDomainRemoveChrDevice(driver, vm, tmpChr);
ret = 0;
ret = qemuDomainRemoveChrDevice(driver, vm, tmpChr);
else
ret = 0;
cleanup:
qemuDomainResetDeviceRemoval(vm);
VIR_FREE(devstr);
VIR_FREE(charAlias);
return ret;
}