[libvirt] [PATCHv2 3/4] qemu: Implement share memory device hot-plug

Signed-off-by: Luyao Huang <lhuang(a)redhat.com&gt; --- src/qemu/qemu_driver.c | 10 ++++++++- src/qemu/qemu_hotplug.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++ src/qemu/qemu_hotplug.h | 3 +++ 3 files changed, 70 insertions(+), 1 deletion(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 5ded9ef..3c25c07 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -7784,6 +7784,15 @@ qemuDomainAttachDeviceLive(virDomainObjPtr vm, dev->data.memory = NULL; break; + case VIR_DOMAIN_DEVICE_SHMEM: + ret = qemuDomainAttachShmemDevice(driver, vm, + dev->data.shmem); + if (!ret) { + alias = dev->data.shmem->info.alias; + dev->data.shmem = NULL; + } + break; + case VIR_DOMAIN_DEVICE_NONE: case VIR_DOMAIN_DEVICE_FS: case VIR_DOMAIN_DEVICE_INPUT: @@ -7795,7 +7804,6 @@ qemuDomainAttachDeviceLive(virDomainObjPtr vm, case VIR_DOMAIN_DEVICE_SMARTCARD: case VIR_DOMAIN_DEVICE_MEMBALLOON: case VIR_DOMAIN_DEVICE_NVRAM: - case VIR_DOMAIN_DEVICE_SHMEM: case VIR_DOMAIN_DEVICE_TPM: case VIR_DOMAIN_DEVICE_PANIC: case VIR_DOMAIN_DEVICE_LAST: diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 8804d3d..c5e544d 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -1882,6 +1882,64 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver, } +int +qemuDomainAttachShmemDevice(virQEMUDriverPtr driver, + virDomainObjPtr vm, + virDomainShmemDefPtr shmem) +{ + int ret = -1; + qemuDomainObjPrivatePtr priv = vm->privateData; + char *devstr = NULL; + char *charAlias = NULL; + + if (virAsprintf(&shmem->info.alias, "shmem%zu", vm->def->nshmems) < 0) + return -1; + + if (VIR_REALLOC_N(vm->def->shmems, vm->def->nshmems + 1) < 0) + return -1; + + if ((shmem->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE || + shmem->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) && + (virDomainPCIAddressEnsureAddr(priv->pciaddrs, &shmem->info) < 0)) + return -1; + + if (!(devstr = qemuBuildShmemDevStr(vm->def, shmem, priv->qemuCaps))) + goto cleanup; + + if (virAsprintf(&charAlias, "char%s", shmem->info.alias) < 0) + goto cleanup; + + qemuDomainObjEnterMonitor(driver, vm); + + if (shmem->server.enabled && + qemuMonitorAttachCharDev(priv->mon, charAlias, + &shmem->server.chr) < 0) { + ignore_value(qemuDomainObjExitMonitor(driver, vm)); + goto cleanup; + } + + if (qemuMonitorAddDevice(priv->mon, devstr) < 0) { + if (shmem->server.enabled) + ignore_value(qemuMonitorDetachCharDev(priv->mon, charAlias)); + ignore_value(qemuDomainObjExitMonitor(driver, vm)); + goto cleanup; + } + if (qemuDomainObjExitMonitor(driver, vm) < 0) + goto cleanup; + + if (virDomainShmemInsert(vm->def, shmem) < 0) + goto cleanup; + + ret = 0; + cleanup: + if (ret < 0) + qemuDomainReleaseDeviceAddress(vm, &shmem->info, NULL); + VIR_FREE(charAlias); + VIR_FREE(devstr); + return ret; +} + + static int qemuDomainAttachHostUSBDevice(virQEMUDriverPtr driver, virDomainObjPtr vm, diff --git a/src/qemu/qemu_hotplug.h b/src/qemu/qemu_hotplug.h index 4140da3..60137a6 100644 --- a/src/qemu/qemu_hotplug.h +++ b/src/qemu/qemu_hotplug.h @@ -109,6 +109,9 @@ int qemuDomainAttachRNGDevice(virQEMUDriverPtr driver, int qemuDomainDetachRNGDevice(virQEMUDriverPtr driver, virDomainObjPtr vm, virDomainRNGDefPtr rng); +int qemuDomainAttachShmemDevice(virQEMUDriverPtr driver, + virDomainObjPtr vm, + virDomainShmemDefPtr shmem); int qemuDomainChrInsert(virDomainDefPtr vmdef, -- 1.8.3.1