[libvirt] [PATCH v3 1/2] qemu: Add support for hot unplugging redirdev device which can use the detach-device --live

From: Chen Hanxiao <chenhanxiao(a)gmail.com&gt; We lacked of hot unplugging redirdev device. This patch add support for it. We could use detach-device --live now. Signed-off-by: Chen Hanxiao <chenhanxiao(a)gmail.com&gt; --- v3: use helper qemuDomainDelChardevTLSObjects address John's comments v2: rebase on master src/qemu/qemu_driver.c | 4 ++- src/qemu/qemu_hotplug.c | 91 +++++++++++++++++++++++++++++++++++++++++++++++++ src/qemu/qemu_hotplug.h | 4 +++ 3 files changed, 98 insertions(+), 1 deletion(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 97b194b05..a91288d4b 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -7787,6 +7787,9 @@ qemuDomainDetachDeviceLive(virDomainObjPtr vm, case VIR_DOMAIN_DEVICE_INPUT: ret = qemuDomainDetachInputDevice(vm, dev->data.input); break; + case VIR_DOMAIN_DEVICE_REDIRDEV: + ret = qemuDomainDetachRedirdevDevice(driver, vm, dev->data.redirdev); + break; case VIR_DOMAIN_DEVICE_FS: case VIR_DOMAIN_DEVICE_SOUND: @@ -7796,7 +7799,6 @@ qemuDomainDetachDeviceLive(virDomainObjPtr vm, case VIR_DOMAIN_DEVICE_SMARTCARD: case VIR_DOMAIN_DEVICE_MEMBALLOON: case VIR_DOMAIN_DEVICE_NVRAM: - case VIR_DOMAIN_DEVICE_REDIRDEV: case VIR_DOMAIN_DEVICE_NONE: case VIR_DOMAIN_DEVICE_TPM: case VIR_DOMAIN_DEVICE_PANIC: diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index b79807300..724ee4f3f 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -4388,6 +4388,54 @@ qemuDomainRemoveInputDevice(virDomainObjPtr vm, } +static int +qemuDomainRemoveRedirdevDevice(virQEMUDriverPtr driver, + virDomainObjPtr vm, + virDomainRedirdevDefPtr dev) +{ + qemuDomainObjPrivatePtr priv = vm->privateData; + virObjectEventPtr event; + char *charAlias = NULL; + ssize_t idx; + int ret = -1; + + VIR_DEBUG("Removing redirdev device %s from domain %p %s", + dev->info.alias, vm, vm->def->name); + + if (!(charAlias = qemuAliasChardevFromDevAlias(dev->info.alias))) + goto cleanup; + + qemuDomainObjEnterMonitor(driver, vm); + /* DeviceDel from Detach may remove chardev, + * so we cannot rely on return status to delete TLS chardevs. + */ + ignore_value(qemuMonitorDetachCharDev(priv->mon, charAlias)); + + if (qemuDomainObjExitMonitor(driver, vm) < 0) + goto cleanup; + + if (qemuDomainDelChardevTLSObjects(driver, vm, + dev->source, charAlias) < 0) + goto cleanup; + + virDomainAuditRedirdev(vm, dev, "detach", true); + + event = virDomainEventDeviceRemovedNewFromObj(vm, dev->info.alias); + qemuDomainEventQueue(driver, event); + + if ((idx = virDomainRedirdevDefFind(vm->def, dev)) >= 0) + virDomainRedirdevDefRemove(vm->def, idx); + qemuDomainReleaseDeviceAddress(vm, &dev->info, NULL); + virDomainRedirdevDefFree(dev); + + ret = 0; + + cleanup: + VIR_FREE(charAlias); + return ret; +} + + int qemuDomainRemoveDevice(virQEMUDriverPtr driver, virDomainObjPtr vm, @@ -5128,6 +5176,49 @@ qemuDomainDetachWatchdog(virQEMUDriverPtr driver, } +int +qemuDomainDetachRedirdevDevice(virQEMUDriverPtr driver, + virDomainObjPtr vm, + virDomainRedirdevDefPtr dev) +{ + int ret = -1; + qemuDomainObjPrivatePtr priv = vm->privateData; + virDomainRedirdevDefPtr tmpRedirdevDef; + ssize_t idx; + + if ((idx = virDomainRedirdevDefFind(vm->def, dev)) < 0) { + virReportError(VIR_ERR_OPERATION_INVALID, "%s", + _("no matching redirdev was not found")); + return -1; + } + + tmpRedirdevDef = vm->def->redirdevs[idx]; + + if (!tmpRedirdevDef->info.alias) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("alias not set for redirdev device")); + return -1; + } + + qemuDomainMarkDeviceForRemoval(vm, &tmpRedirdevDef->info); + + qemuDomainObjEnterMonitor(driver, vm); + if (qemuMonitorDelDevice(priv->mon, tmpRedirdevDef->info.alias) < 0) { + ignore_value(qemuDomainObjExitMonitor(driver, vm)); + goto cleanup; + } + if (qemuDomainObjExitMonitor(driver, vm) < 0) + goto cleanup; + + if ((ret = qemuDomainWaitForDeviceRemoval(vm)) == 1) + ret = qemuDomainRemoveRedirdevDevice(driver, vm, tmpRedirdevDef); + + cleanup: + qemuDomainResetDeviceRemoval(vm); + return ret; +} + + int qemuDomainDetachNetDevice(virQEMUDriverPtr driver, virDomainObjPtr vm, diff --git a/src/qemu/qemu_hotplug.h b/src/qemu/qemu_hotplug.h index 3e0d618e0..9a0c057f1 100644 --- a/src/qemu/qemu_hotplug.h +++ b/src/qemu/qemu_hotplug.h @@ -126,6 +126,10 @@ int qemuDomainDetachWatchdog(virQEMUDriverPtr driver, virDomainObjPtr vm, virDomainWatchdogDefPtr watchdog); +int qemuDomainDetachRedirdevDevice(virQEMUDriverPtr driver, + virDomainObjPtr vm, + virDomainRedirdevDefPtr dev); + int qemuDomainAttachInputDevice(virQEMUDriverPtr driver, virDomainObjPtr vm, virDomainInputDefPtr input); -- 2.14.3