[libvirt] [PATCH 00/11] qemu: Fix <shareable/> disks for new qemu
Introduction of the disk image locking in qemu created a regression where disk shared access with <shareable/> would not work. Since the disk locking is a desired feature, allow libvirt to configure qemu in such way that <shareable/> disks are exempt from write locks. First few patches refactor some stuff so that it's less ugly. This series also mandates that sharing is used only with 'raw' disks since other formats could corrupt metadata. Peter Krempa (11): qemu: Move snapshot disk validation functions into one qemu: domain: Despaghetify qemuDomainDeviceDefValidate qemu: domain: Move hostdev validation into separate function qemu: domain: Move video device validation into separate function qemu: domain: Refactor domain device validation function qemu: block: Add function to check if storage source allows concurrent access qemu: domain: Reject shared disk access if backing format does not support it qemu: snapshot: Disallow snapshot of unsupported shared disks qemu: Disallow pivot of shared disks to unsupported storage qemu: caps: Add capability for 'share-rw' disk option qemu: command: Mark <shared/> disks as such in qemu src/qemu/qemu_block.c | 15 ++ src/qemu/qemu_block.h | 3 + src/qemu/qemu_capabilities.c | 2 + src/qemu/qemu_capabilities.h | 1 + src/qemu/qemu_command.c | 4 + src/qemu/qemu_domain.c | 291 +++++++++++++-------- src/qemu/qemu_driver.c | 121 +++++---- .../caps_2.10.0-gicv2.aarch64.xml | 1 + .../caps_2.10.0-gicv3.aarch64.xml | 1 + tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml | 1 + tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml | 1 + tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml | 1 + tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml | 1 + .../qemuxml2argv-disk-drive-shared-locking.args | 28 ++ .../qemuxml2argv-disk-drive-shared-locking.xml | 36 +++ .../qemuxml2argv-disk-drive-shared-qcow.xml | 28 ++ .../qemuxml2argv-disk-drive-shared.args | 2 +- .../qemuxml2argv-disk-drive-shared.xml | 2 +- tests/qemuxml2argvtest.c | 3 + 19 files changed, 378 insertions(+), 164 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.xml create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-qcow.xml -- 2.14.3
Move the code so that both the new image and old image can be verified in the same function. --- src/qemu/qemu_driver.c | 91 ++++++++++++++++++++------------------------------ 1 file changed, 36 insertions(+), 55 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 6132bc4a9..f907ede16 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -13945,17 +13945,19 @@ qemuDomainSnapshotCreateActiveInternal(virConnectPtr conn, static int -qemuDomainSnapshotPrepareDiskExternalBackingInactive(virDomainDiskDefPtr disk) +qemuDomainSnapshotPrepareDiskExternalInactive(virDomainSnapshotDiskDefPtr snapdisk, + virDomainDiskDefPtr domdisk) { - int actualType = virStorageSourceGetActualType(disk->src); + int domDiskType = virStorageSourceGetActualType(domdisk->src); + int snapDiskType = virStorageSourceGetActualType(snapdisk->src); - switch ((virStorageType) actualType) { + switch ((virStorageType) domDiskType) { case VIR_STORAGE_TYPE_BLOCK: case VIR_STORAGE_TYPE_FILE: - return 0; + break; case VIR_STORAGE_TYPE_NETWORK: - switch ((virStorageNetProtocol) disk->src->protocol) { + switch ((virStorageNetProtocol) domdisk->src->protocol) { case VIR_STORAGE_NET_PROTOCOL_NONE: case VIR_STORAGE_NET_PROTOCOL_NBD: case VIR_STORAGE_NET_PROTOCOL_RBD: @@ -13973,7 +13975,7 @@ qemuDomainSnapshotPrepareDiskExternalBackingInactive(virDomainDiskDefPtr disk) virReportError(VIR_ERR_INTERNAL_ERROR, _("external inactive snapshots are not supported on " "'network' disks using '%s' protocol"), - virStorageNetProtocolTypeToString(disk->src->protocol)); + virStorageNetProtocolTypeToString(domdisk->src->protocol)); return -1; } break; @@ -13984,7 +13986,23 @@ qemuDomainSnapshotPrepareDiskExternalBackingInactive(virDomainDiskDefPtr disk) case VIR_STORAGE_TYPE_LAST: virReportError(VIR_ERR_INTERNAL_ERROR, _("external inactive snapshots are not supported on " - "'%s' disks"), virStorageTypeToString(actualType)); + "'%s' disks"), virStorageTypeToString(domDiskType)); + return -1; + } + + switch ((virStorageType) snapDiskType) { + case VIR_STORAGE_TYPE_BLOCK: + case VIR_STORAGE_TYPE_FILE: + break; + + case VIR_STORAGE_TYPE_NETWORK: + case VIR_STORAGE_TYPE_DIR: + case VIR_STORAGE_TYPE_VOLUME: + case VIR_STORAGE_TYPE_NONE: + case VIR_STORAGE_TYPE_LAST: + virReportError(VIR_ERR_INTERNAL_ERROR, + _("external inactive snapshots are not supported on " + "'%s' disks"), virStorageTypeToString(snapDiskType)); return -1; } @@ -13993,33 +14011,27 @@ qemuDomainSnapshotPrepareDiskExternalBackingInactive(virDomainDiskDefPtr disk) static int -qemuDomainSnapshotPrepareDiskExternalBackingActive(virDomainDiskDefPtr disk) +qemuDomainSnapshotPrepareDiskExternalActive(virDomainSnapshotDiskDefPtr snapdisk, + virDomainDiskDefPtr domdisk) { - if (disk->device == VIR_DOMAIN_DISK_DEVICE_LUN) { + int actualType = virStorageSourceGetActualType(snapdisk->src); + + if (domdisk->device == VIR_DOMAIN_DISK_DEVICE_LUN) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("external active snapshots are not supported on scsi " "passthrough devices")); return -1; } - return 0; -} - - -static int -qemuDomainSnapshotPrepareDiskExternalOverlayActive(virDomainSnapshotDiskDefPtr disk) -{ - int actualType = virStorageSourceGetActualType(disk->src); - switch ((virStorageType) actualType) { case VIR_STORAGE_TYPE_BLOCK: case VIR_STORAGE_TYPE_FILE: - return 0; + break; case VIR_STORAGE_TYPE_NETWORK: - switch ((virStorageNetProtocol) disk->src->protocol) { + switch ((virStorageNetProtocol) snapdisk->src->protocol) { case VIR_STORAGE_NET_PROTOCOL_GLUSTER: - return 0; + break; case VIR_STORAGE_NET_PROTOCOL_NONE: case VIR_STORAGE_NET_PROTOCOL_NBD: @@ -14037,7 +14049,7 @@ qemuDomainSnapshotPrepareDiskExternalOverlayActive(virDomainSnapshotDiskDefPtr d virReportError(VIR_ERR_INTERNAL_ERROR, _("external active snapshots are not supported on " "'network' disks using '%s' protocol"), - virStorageNetProtocolTypeToString(disk->src->protocol)); + virStorageNetProtocolTypeToString(snapdisk->src->protocol)); return -1; } @@ -14057,31 +14069,6 @@ qemuDomainSnapshotPrepareDiskExternalOverlayActive(virDomainSnapshotDiskDefPtr d } -static int -qemuDomainSnapshotPrepareDiskExternalOverlayInactive(virDomainSnapshotDiskDefPtr disk) -{ - int actualType = virStorageSourceGetActualType(disk->src); - - switch ((virStorageType) actualType) { - case VIR_STORAGE_TYPE_BLOCK: - case VIR_STORAGE_TYPE_FILE: - return 0; - - case VIR_STORAGE_TYPE_NETWORK: - case VIR_STORAGE_TYPE_DIR: - case VIR_STORAGE_TYPE_VOLUME: - case VIR_STORAGE_TYPE_NONE: - case VIR_STORAGE_TYPE_LAST: - virReportError(VIR_ERR_INTERNAL_ERROR, - _("external inactive snapshots are not supported on " - "'%s' disks"), virStorageTypeToString(actualType)); - return -1; - } - - return 0; -} - - static int qemuDomainSnapshotPrepareDiskExternal(virConnectPtr conn, virDomainDiskDefPtr disk, @@ -14099,16 +14086,10 @@ qemuDomainSnapshotPrepareDiskExternal(virConnectPtr conn, if (virStorageTranslateDiskSourcePool(conn, disk) < 0) return -1; - if (qemuDomainSnapshotPrepareDiskExternalBackingInactive(disk) < 0) - return -1; - - if (qemuDomainSnapshotPrepareDiskExternalOverlayInactive(snapdisk) < 0) + if (qemuDomainSnapshotPrepareDiskExternalInactive(snapdisk, disk) < 0) return -1; } else { - if (qemuDomainSnapshotPrepareDiskExternalBackingActive(disk) < 0) - return -1; - - if (qemuDomainSnapshotPrepareDiskExternalOverlayActive(snapdisk) < 0) + if (qemuDomainSnapshotPrepareDiskExternalActive(snapdisk, disk) < 0) return -1; } -- 2.14.3
Move network device validation into a separate function. --- src/qemu/qemu_domain.c | 158 ++++++++++++++++++++++++++----------------------- 1 file changed, 84 insertions(+), 74 deletions(-) diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index cc7596bad..3755a2390 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -3589,101 +3589,111 @@ qemuDomainWatchdogDefValidate(const virDomainWatchdogDef *dev, static int -qemuDomainDeviceDefValidate(const virDomainDeviceDef *dev, - const virDomainDef *def, - void *opaque ATTRIBUTE_UNUSED) +qemuDomainDeviceDefValidateNetwork(const virDomainNetDef *net) { - int ret = -1; + bool hasIPv4 = false; + bool hasIPv6 = false; size_t i; - if (dev->type == VIR_DOMAIN_DEVICE_NET) { - const virDomainNetDef *net = dev->data.net; - bool hasIPv4 = false, hasIPv6 = false; + if (net->type == VIR_DOMAIN_NET_TYPE_USER) { + if (net->guestIP.nroutes) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("Invalid attempt to set network interface " + "guest-side IP route, not supported by QEMU")); + return -1; + } - if (net->type == VIR_DOMAIN_NET_TYPE_USER) { - if (net->guestIP.nroutes) { + for (i = 0; i < net->guestIP.nips; i++) { + const virNetDevIPAddr *ip = net->guestIP.ips[i]; + + if (VIR_SOCKET_ADDR_VALID(&net->guestIP.ips[i]->peer)) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", - _("Invalid attempt to set network interface " - "guest-side IP route, not supported by QEMU")); - goto cleanup; + _("Invalid attempt to set peer IP for guest")); + return -1; } - for (i = 0; i < net->guestIP.nips; i++) { - const virNetDevIPAddr *ip = net->guestIP.ips[i]; - - if (VIR_SOCKET_ADDR_VALID(&net->guestIP.ips[i]->peer)) { + if (VIR_SOCKET_ADDR_IS_FAMILY(&ip->address, AF_INET)) { + if (hasIPv4) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", - _("Invalid attempt to set peer IP for guest")); - goto cleanup; + _("Only one IPv4 address per " + "interface is allowed")); + return -1; } + hasIPv4 = true; - if (VIR_SOCKET_ADDR_IS_FAMILY(&ip->address, AF_INET)) { - if (hasIPv4) { - virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", - _("Only one IPv4 address per " - "interface is allowed")); - goto cleanup; - } - hasIPv4 = true; - - if (ip->prefix > 27) { - virReportError(VIR_ERR_XML_ERROR, "%s", - _("prefix too long")); - goto cleanup; - } + if (ip->prefix > 27) { + virReportError(VIR_ERR_XML_ERROR, "%s", + _("prefix too long")); + return -1; } + } - if (VIR_SOCKET_ADDR_IS_FAMILY(&ip->address, AF_INET6)) { - if (hasIPv6) { - virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", - _("Only one IPv6 address per " - "interface is allowed")); - goto cleanup; - } - hasIPv6 = true; + if (VIR_SOCKET_ADDR_IS_FAMILY(&ip->address, AF_INET6)) { + if (hasIPv6) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("Only one IPv6 address per " + "interface is allowed")); + return -1; + } + hasIPv6 = true; - if (ip->prefix > 120) { - virReportError(VIR_ERR_XML_ERROR, "%s", - _("prefix too long")); - goto cleanup; - } + if (ip->prefix > 120) { + virReportError(VIR_ERR_XML_ERROR, "%s", + _("prefix too long")); + return -1; } } - } else if (net->guestIP.nroutes || net->guestIP.nips) { - virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", - _("Invalid attempt to set network interface " - "guest-side IP route and/or address info, " - "not supported by QEMU")); - goto cleanup; } + } else if (net->guestIP.nroutes || net->guestIP.nips) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("Invalid attempt to set network interface " + "guest-side IP route and/or address info, " + "not supported by QEMU")); + return -1; + } - if (STREQ_NULLABLE(net->model, "virtio")) { - if (net->driver.virtio.rx_queue_size & (net->driver.virtio.rx_queue_size - 1)) { - virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", - _("rx_queue_size has to be a power of two")); - goto cleanup; - } - if (net->driver.virtio.tx_queue_size & (net->driver.virtio.tx_queue_size - 1)) { - virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", - _("tx_queue_size has to be a power of two")); - goto cleanup; - } + if (STREQ_NULLABLE(net->model, "virtio")) { + if (net->driver.virtio.rx_queue_size & (net->driver.virtio.rx_queue_size - 1)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("rx_queue_size has to be a power of two")); + return -1; } - - if (net->mtu && - !qemuDomainNetSupportsMTU(net->type)) { - virReportError(VIR_ERR_CONFIG_UNSUPPORTED, - _("setting MTU on interface type %s is not supported yet"), - virDomainNetTypeToString(net->type)); - goto cleanup; + if (net->driver.virtio.tx_queue_size & (net->driver.virtio.tx_queue_size - 1)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("tx_queue_size has to be a power of two")); + return -1; } + } - if (net->coalesce && !qemuDomainNetSupportsCoalesce(net->type)) { - virReportError(VIR_ERR_CONFIG_UNSUPPORTED, - _("coalesce settings on interface type %s are not supported"), - virDomainNetTypeToString(net->type)); + if (net->mtu && + !qemuDomainNetSupportsMTU(net->type)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("setting MTU on interface type %s is not supported yet"), + virDomainNetTypeToString(net->type)); + return -1; + } + + if (net->coalesce && !qemuDomainNetSupportsCoalesce(net->type)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("coalesce settings on interface type %s are not supported"), + virDomainNetTypeToString(net->type)); + return -1; + } + + return 0; +} + + +static int +qemuDomainDeviceDefValidate(const virDomainDeviceDef *dev, + const virDomainDef *def, + void *opaque ATTRIBUTE_UNUSED) +{ + int ret = -1; + + if (dev->type == VIR_DOMAIN_DEVICE_NET) { + if (qemuDomainDeviceDefValidateNetwork(dev->data.net) < 0) goto cleanup; - } } else if (dev->type == VIR_DOMAIN_DEVICE_CHR) { if (qemuDomainChrDefValidate(dev->data.chr, def) < 0) goto cleanup; -- 2.14.3
--- src/qemu/qemu_domain.c | 30 ++++++++++++++++++++---------- 1 file changed, 20 insertions(+), 10 deletions(-) diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 3755a2390..7a369969d 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -3684,6 +3684,23 @@ qemuDomainDeviceDefValidateNetwork(const virDomainNetDef *net) } +static int +qemuDomainDeviceDefValidateHostdev(const virDomainHostdevDef *hostdev, + const virDomainDef *def) +{ + /* forbid capabilities mode hostdev in this kind of hypervisor */ + if (hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_CAPABILITIES) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("hostdev mode 'capabilities' is not " + "supported in %s"), + virDomainVirtTypeToString(def->virtType)); + return -1; + } + + return 0; +} + + static int qemuDomainDeviceDefValidate(const virDomainDeviceDef *dev, const virDomainDef *def, @@ -3709,16 +3726,9 @@ qemuDomainDeviceDefValidate(const virDomainDeviceDef *dev, } else if (dev->type == VIR_DOMAIN_DEVICE_WATCHDOG) { if (qemuDomainWatchdogDefValidate(dev->data.watchdog, def) < 0) goto cleanup; - } - - /* forbid capabilities mode hostdev in this kind of hypervisor */ - if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV && - dev->data.hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_CAPABILITIES) { - virReportError(VIR_ERR_CONFIG_UNSUPPORTED, - _("hostdev mode 'capabilities' is not " - "supported in %s"), - virDomainVirtTypeToString(def->virtType)); - goto cleanup; + } else if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV) { + if (qemuDomainDeviceDefValidateHostdev(dev->data.hostdev, def) < 0) + goto cleanup; } if (dev->type == VIR_DOMAIN_DEVICE_VIDEO) { -- 2.14.3
--- src/qemu/qemu_domain.c | 43 ++++++++++++++++++++++++++----------------- 1 file changed, 26 insertions(+), 17 deletions(-) diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 7a369969d..acda06b91 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -3701,6 +3701,29 @@ qemuDomainDeviceDefValidateHostdev(const virDomainHostdevDef *hostdev, } +static int +qemuDomainDeviceDefValidateVideo(const virDomainVideoDef *video) +{ + if (video->type == VIR_DOMAIN_VIDEO_TYPE_QXL && + video->vgamem) { + if (video->vgamem < 1024) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("value for 'vgamem' must be at least 1 MiB " + "(1024 KiB)")); + return -1; + } + + if (video->vgamem != VIR_ROUND_UP_POWER_OF_TWO(video->vgamem)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("value for 'vgamem' must be power of two")); + return -1; + } + } + + return 0; +} + + static int qemuDomainDeviceDefValidate(const virDomainDeviceDef *dev, const virDomainDef *def, @@ -3729,23 +3752,9 @@ qemuDomainDeviceDefValidate(const virDomainDeviceDef *dev, } else if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV) { if (qemuDomainDeviceDefValidateHostdev(dev->data.hostdev, def) < 0) goto cleanup; - } - - if (dev->type == VIR_DOMAIN_DEVICE_VIDEO) { - if (dev->data.video->type == VIR_DOMAIN_VIDEO_TYPE_QXL && - dev->data.video->vgamem) { - if (dev->data.video->vgamem < 1024) { - virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", - _("value for 'vgamem' must be at least 1 MiB " - "(1024 KiB)")); - goto cleanup; - } - if (dev->data.video->vgamem != VIR_ROUND_UP_POWER_OF_TWO(dev->data.video->vgamem)) { - virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", - _("value for 'vgamem' must be power of two")); - goto cleanup; - } - } + } else if (dev->type == VIR_DOMAIN_DEVICE_VIDEO) { + if (qemuDomainDeviceDefValidateVideo(dev->data.video) < 0) + goto cleanup; } ret = 0; -- 2.14.3
Use a style that will discourage from adding inline checks. --- src/qemu/qemu_domain.c | 79 +++++++++++++++++++++++++++++++++----------------- 1 file changed, 52 insertions(+), 27 deletions(-) diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index acda06b91..29fdb49d1 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -3729,36 +3729,61 @@ qemuDomainDeviceDefValidate(const virDomainDeviceDef *dev, const virDomainDef *def, void *opaque ATTRIBUTE_UNUSED) { - int ret = -1; + int ret = 0; - if (dev->type == VIR_DOMAIN_DEVICE_NET) { - if (qemuDomainDeviceDefValidateNetwork(dev->data.net) < 0) - goto cleanup; - } else if (dev->type == VIR_DOMAIN_DEVICE_CHR) { - if (qemuDomainChrDefValidate(dev->data.chr, def) < 0) - goto cleanup; - } else if (dev->type == VIR_DOMAIN_DEVICE_SMARTCARD) { - if (qemuDomainSmartcardDefValidate(dev->data.smartcard) < 0) - goto cleanup; - } else if (dev->type == VIR_DOMAIN_DEVICE_RNG) { - if (qemuDomainRNGDefValidate(dev->data.rng) < 0) - goto cleanup; - } else if (dev->type == VIR_DOMAIN_DEVICE_REDIRDEV) { - if (qemuDomainRedirdevDefValidate(dev->data.redirdev) < 0) - goto cleanup; - } else if (dev->type == VIR_DOMAIN_DEVICE_WATCHDOG) { - if (qemuDomainWatchdogDefValidate(dev->data.watchdog, def) < 0) - goto cleanup; - } else if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV) { - if (qemuDomainDeviceDefValidateHostdev(dev->data.hostdev, def) < 0) - goto cleanup; - } else if (dev->type == VIR_DOMAIN_DEVICE_VIDEO) { - if (qemuDomainDeviceDefValidateVideo(dev->data.video) < 0) - goto cleanup; + switch ((virDomainDeviceType) dev->type) { + case VIR_DOMAIN_DEVICE_NET: + ret = qemuDomainDeviceDefValidateNetwork(dev->data.net); + break; + + case VIR_DOMAIN_DEVICE_CHR: + ret = qemuDomainChrDefValidate(dev->data.chr, def); + break; + + case VIR_DOMAIN_DEVICE_SMARTCARD: + ret = qemuDomainSmartcardDefValidate(dev->data.smartcard); + break; + + case VIR_DOMAIN_DEVICE_RNG: + ret = qemuDomainRNGDefValidate(dev->data.rng); + break; + + case VIR_DOMAIN_DEVICE_REDIRDEV: + ret = qemuDomainRedirdevDefValidate(dev->data.redirdev); + break; + + case VIR_DOMAIN_DEVICE_WATCHDOG: + ret = qemuDomainWatchdogDefValidate(dev->data.watchdog, def); + break; + + case VIR_DOMAIN_DEVICE_HOSTDEV: + ret = qemuDomainDeviceDefValidateHostdev(dev->data.hostdev, def); + break; + + case VIR_DOMAIN_DEVICE_VIDEO: + ret = qemuDomainDeviceDefValidateVideo(dev->data.video); + break; + + case VIR_DOMAIN_DEVICE_DISK: + case VIR_DOMAIN_DEVICE_LEASE: + case VIR_DOMAIN_DEVICE_FS: + case VIR_DOMAIN_DEVICE_INPUT: + case VIR_DOMAIN_DEVICE_SOUND: + case VIR_DOMAIN_DEVICE_CONTROLLER: + case VIR_DOMAIN_DEVICE_GRAPHICS: + case VIR_DOMAIN_DEVICE_HUB: + 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_MEMORY: + case VIR_DOMAIN_DEVICE_IOMMU: + case VIR_DOMAIN_DEVICE_NONE: + case VIR_DOMAIN_DEVICE_LAST: + break; } - ret = 0; - cleanup: return ret; } -- 2.14.3
Storage source format backing a shared device (e.g. running a cluster filesystem) needs to support the sharing so that metadata are not corrupted. Add a central function for checking this. --- src/qemu/qemu_block.c | 15 +++++++++++++++ src/qemu/qemu_block.h | 3 +++ 2 files changed, 18 insertions(+) diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c index 8b23df822..29a341f14 100644 --- a/src/qemu/qemu_block.c +++ b/src/qemu/qemu_block.c @@ -390,6 +390,21 @@ qemuBlockGetNodeData(virJSONValuePtr data) } +/** + * qemuBlockStorageSourceSupportsConcurrentAccess: + * @src: disk storage source + * + * Returns true if the given storage format supports concurrent access from two + * separate processes. + */ +bool +qemuBlockStorageSourceSupportsConcurrentAccess(virStorageSourcePtr src) +{ + /* no need to check in backing chain since only RAW storage supports this */ + return src->format == VIR_STORAGE_FILE_RAW; +} + + /** * qemuBlockStorageSourceGetURI: * @src: disk storage source diff --git a/src/qemu/qemu_block.h b/src/qemu/qemu_block.h index b9ee97f48..45485733f 100644 --- a/src/qemu/qemu_block.h +++ b/src/qemu/qemu_block.h @@ -54,6 +54,9 @@ qemuBlockNodeNamesDetect(virQEMUDriverPtr driver, virHashTablePtr qemuBlockGetNodeData(virJSONValuePtr data); +bool +qemuBlockStorageSourceSupportsConcurrentAccess(virStorageSourcePtr src); + virJSONValuePtr qemuBlockStorageSourceGetBackendProps(virStorageSourcePtr src); -- 2.14.3
Certain disk format drivers in qemu don't allow concurrent acces at the level of the format driver since it would corrupt the metadata. Reject shared access for a disk if the format does not support it. Currently only RAW format supports it since it does not have any metadata. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1511480 --- src/qemu/qemu_domain.c | 19 +++++++++++++++ .../qemuxml2argv-disk-drive-shared-qcow.xml | 28 ++++++++++++++++++++++ .../qemuxml2argv-disk-drive-shared.args | 2 +- .../qemuxml2argv-disk-drive-shared.xml | 2 +- tests/qemuxml2argvtest.c | 1 + 5 files changed, 50 insertions(+), 2 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-qcow.xml diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 29fdb49d1..fdbe6a4e3 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -25,6 +25,7 @@ #include "qemu_domain.h" #include "qemu_alias.h" +#include "qemu_block.h" #include "qemu_cgroup.h" #include "qemu_command.h" #include "qemu_process.h" @@ -3724,6 +3725,21 @@ qemuDomainDeviceDefValidateVideo(const virDomainVideoDef *video) } +static int +qemuDomainDeviceDefValidateDisk(const virDomainDiskDef *disk) +{ + if (disk->src->shared && !disk->src->readonly && + !qemuBlockStorageSourceSupportsConcurrentAccess(disk->src)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("shared access for disk '%s' requires use of " + "supported storage format"), disk->dst); + return -1; + } + + return 0; +} + + static int qemuDomainDeviceDefValidate(const virDomainDeviceDef *dev, const virDomainDef *def, @@ -3765,6 +3781,9 @@ qemuDomainDeviceDefValidate(const virDomainDeviceDef *dev, break; case VIR_DOMAIN_DEVICE_DISK: + ret = qemuDomainDeviceDefValidateDisk(dev->data.disk); + break; + case VIR_DOMAIN_DEVICE_LEASE: case VIR_DOMAIN_DEVICE_FS: case VIR_DOMAIN_DEVICE_INPUT: diff --git a/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-qcow.xml b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-qcow.xml new file mode 100644 index 000000000..ca88a944b --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-qcow.xml @@ -0,0 +1,28 @@ +<domain type='qemu'> + <name>QEMUGuest1</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219136</memory> + <currentMemory unit='KiB'>219136</currentMemory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='i686' machine='pc'>hvm</type> + <boot dev='hd'/> + </os> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + <emulator>/usr/bin/qemu-system-i686</emulator> + <disk type='block' device='disk'> + <driver name='qemu' type='qcow2'/> + <source dev='/dev/HostVG/QEMUGuest1'/> + <target dev='hda' bus='ide'/> + <shareable/> + <address type='drive' controller='0' bus='0' target='0' unit='0'/> + </disk> + <controller type='usb' index='0'/> + <controller type='ide' index='0'/> + <memballoon model='virtio'/> + </devices> +</domain> diff --git a/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared.args b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared.args index 502157bf8..326fde1b3 100644 --- a/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared.args +++ b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared.args @@ -19,7 +19,7 @@ server,nowait \ -no-acpi \ -boot c \ -usb \ --drive file=/dev/HostVG/QEMUGuest1,format=qcow2,if=none,id=drive-ide0-0-0,\ +-drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-ide0-0-0,\ serial=XYZXYZXYZYXXYZYZYXYZY,cache=none \ -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 \ -drive file=/dev/HostVG/QEMUGuest2,format=raw,if=none,media=cdrom,\ diff --git a/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared.xml b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared.xml index 9f7472378..677c2b0b7 100644 --- a/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared.xml +++ b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared.xml @@ -15,7 +15,7 @@ <devices> <emulator>/usr/bin/qemu-system-i686</emulator> <disk type='block' device='disk'> - <driver name='qemu' type='qcow2'/> + <driver name='qemu' type='raw'/> <source dev='/dev/HostVG/QEMUGuest1'/> <target dev='hda' bus='ide'/> <shareable/> diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index 1bedc6874..bfced6dda 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -908,6 +908,7 @@ mymain(void) QEMU_CAPS_DRIVE_BOOT); DO_TEST("disk-drive-shared", QEMU_CAPS_DRIVE_SERIAL); + DO_TEST_PARSE_ERROR("disk-drive-shared-qcow", NONE); DO_TEST("disk-drive-error-policy-stop", QEMU_CAPS_MONITOR_JSON); DO_TEST("disk-drive-error-policy-enospace", -- 2.14.3
Snapshots introduce a new layer into the backing chain, so we need to make sure that we don't use format which does not support being shared. This effectively disables snapshots on <shareable/> disks since only raw format is currently supported. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1511480 --- src/qemu/qemu_driver.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index f907ede16..f7984a87d 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -13944,6 +13944,24 @@ qemuDomainSnapshotCreateActiveInternal(virConnectPtr conn, } +static int +qemuDomainSnapshotPrepareDiskShared(virDomainSnapshotDiskDefPtr snapdisk, + virDomainDiskDefPtr domdisk) +{ + if (!domdisk->src->shared || domdisk->src->readonly) + return 0; + + if (!qemuBlockStorageSourceSupportsConcurrentAccess(snapdisk->src)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("shared access for disk '%s' requires use of " + "supported storage format"), domdisk->dst); + return -1; + } + + return 0; +} + + static int qemuDomainSnapshotPrepareDiskExternalInactive(virDomainSnapshotDiskDefPtr snapdisk, virDomainDiskDefPtr domdisk) @@ -14006,6 +14024,9 @@ qemuDomainSnapshotPrepareDiskExternalInactive(virDomainSnapshotDiskDefPtr snapdi return -1; } + if (qemuDomainSnapshotPrepareDiskShared(snapdisk, domdisk) < 0) + return -1; + return 0; } @@ -14065,6 +14086,9 @@ qemuDomainSnapshotPrepareDiskExternalActive(virDomainSnapshotDiskDefPtr snapdisk return -1; } + if (qemuDomainSnapshotPrepareDiskShared(snapdisk, domdisk) < 0) + return -1; + return 0; } -- 2.14.3
Pivoting to a unsupported storage type might break the assumption that shared disks will not corrupt metadata. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1511480 --- src/qemu/qemu_driver.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index f7984a87d..520409cc1 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -16501,6 +16501,16 @@ qemuDomainBlockPivot(virQEMUDriverPtr driver, goto cleanup; } + /* When pivoting to a shareable disk we need to make sure that the disk can + * be safely shared, since block copy might have changed the format. */ + if (disk->src->shared && !disk->src->readonly && + !qemuBlockStorageSourceSupportsConcurrentAccess(disk->mirror)) { + virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s", + _("can't pivot a shared disk to a storage volume not " + "supporting sharing")); + goto cleanup; + } + /* For active commit, the mirror is part of the already labeled * chain. For blockcopy, we previously labeled only the top-level * image; but if the user is reusing an external image that -- 2.14.3
'share-rw' for the disk device configures qemu to allow concurrent access to the backing storage. --- src/qemu/qemu_capabilities.c | 2 ++ src/qemu/qemu_capabilities.h | 1 + tests/qemucapabilitiesdata/caps_2.10.0-gicv2.aarch64.xml | 1 + tests/qemucapabilitiesdata/caps_2.10.0-gicv3.aarch64.xml | 1 + tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml | 1 + tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml | 1 + tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml | 1 + tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml | 1 + 8 files changed, 9 insertions(+) diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 1badadbc2..099e996e4 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -444,6 +444,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST, "vxhs", "virtio-blk.num-queues", "machine.pseries.resize-hpt", + "drive.share-rw", ); @@ -1719,6 +1720,7 @@ static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsSCSIDisk[] = { static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsIDEDrive[] = { { "wwn", QEMU_CAPS_IDE_DRIVE_WWN }, + { "share-rw", QEMU_CAPS_DRIVE_SHARE_RW }, }; static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsPiix4PM[] = { diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h index f0e2e9016..4b084f45e 100644 --- a/src/qemu/qemu_capabilities.h +++ b/src/qemu/qemu_capabilities.h @@ -430,6 +430,7 @@ typedef enum { QEMU_CAPS_VXHS, /* -drive file.driver=vxhs via query-qmp-schema */ QEMU_CAPS_VIRTIO_BLK_NUM_QUEUES, /* virtio-blk-*.num-queues */ QEMU_CAPS_MACHINE_PSERIES_RESIZE_HPT, /* -machine pseries,resize-hpt */ + QEMU_CAPS_DRIVE_SHARE_RW, /* -drive file.share-rw=on */ QEMU_CAPS_LAST /* this must always be the last item */ } virQEMUCapsFlags; diff --git a/tests/qemucapabilitiesdata/caps_2.10.0-gicv2.aarch64.xml b/tests/qemucapabilitiesdata/caps_2.10.0-gicv2.aarch64.xml index 9f9dceb68..175dd8e43 100644 --- a/tests/qemucapabilitiesdata/caps_2.10.0-gicv2.aarch64.xml +++ b/tests/qemucapabilitiesdata/caps_2.10.0-gicv2.aarch64.xml @@ -180,6 +180,7 @@ <flag name='virtio-gpu.max_outputs'/> <flag name='vxhs'/> <flag name='virtio-blk.num-queues'/> + <flag name='drive.share-rw'/> <version>2010000</version> <kvmVersion>0</kvmVersion> <package> (v2.10.0)</package> diff --git a/tests/qemucapabilitiesdata/caps_2.10.0-gicv3.aarch64.xml b/tests/qemucapabilitiesdata/caps_2.10.0-gicv3.aarch64.xml index 3c2d2eed6..e3838c0ce 100644 --- a/tests/qemucapabilitiesdata/caps_2.10.0-gicv3.aarch64.xml +++ b/tests/qemucapabilitiesdata/caps_2.10.0-gicv3.aarch64.xml @@ -180,6 +180,7 @@ <flag name='virtio-gpu.max_outputs'/> <flag name='vxhs'/> <flag name='virtio-blk.num-queues'/> + <flag name='drive.share-rw'/> <version>2010000</version> <kvmVersion>0</kvmVersion> <package> (v2.10.0)</package> diff --git a/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml index b0ee3f152..7d1575e9d 100644 --- a/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml +++ b/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml @@ -178,6 +178,7 @@ <flag name='vxhs'/> <flag name='virtio-blk.num-queues'/> <flag name='machine.pseries.resize-hpt'/> + <flag name='drive.share-rw'/> <version>2010000</version> <kvmVersion>0</kvmVersion> <package> (v2.10.0)</package> diff --git a/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml index ddbd8c32f..ccbf3a515 100644 --- a/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml +++ b/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml @@ -224,6 +224,7 @@ <flag name='virtio-gpu.max_outputs'/> <flag name='vxhs'/> <flag name='virtio-blk.num-queues'/> + <flag name='drive.share-rw'/> <version>2010000</version> <kvmVersion>0</kvmVersion> <package> (v2.10.0)</package> diff --git a/tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml index 786cea8ea..d0ef648d6 100644 --- a/tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml +++ b/tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml @@ -173,6 +173,7 @@ <flag name='chardev-reconnect'/> <flag name='virtio-gpu.max_outputs'/> <flag name='virtio-blk.num-queues'/> + <flag name='drive.share-rw'/> <version>2009000</version> <kvmVersion>0</kvmVersion> <package> (v2.9.0)</package> diff --git a/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml index 05f9dc030..750c418dc 100644 --- a/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml +++ b/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml @@ -221,6 +221,7 @@ <flag name='chardev-reconnect'/> <flag name='virtio-gpu.max_outputs'/> <flag name='virtio-blk.num-queues'/> + <flag name='drive.share-rw'/> <version>2009000</version> <kvmVersion>0</kvmVersion> <package> (v2.9.0)</package> -- 2.14.3
Qemu has now an internal mechanism for locking images to fix specific cases of disk corruption. This requires libvirt to mark the image as shared so that qemu lifts certain restrictions. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1378242 --- src/qemu/qemu_command.c | 4 +++ .../qemuxml2argv-disk-drive-shared-locking.args | 28 +++++++++++++++++ .../qemuxml2argv-disk-drive-shared-locking.xml | 36 ++++++++++++++++++++++ tests/qemuxml2argvtest.c | 2 ++ 4 files changed, 70 insertions(+) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.xml diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 56729e498..e8534771e 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -2070,6 +2070,10 @@ qemuBuildDriveDevStr(const virDomainDef *def, virBufferAsprintf(&opt, ",num-queues=%u", disk->queues); } + if (disk->src->shared && + virQEMUCapsGet(qemuCaps, QEMU_CAPS_DRIVE_SHARE_RW)) + virBufferAddLit(&opt, ",share-rw=on"); + if (qemuBuildVirtioOptionsStr(&opt, disk->virtio, qemuCaps) < 0) goto error; diff --git a/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.args b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.args new file mode 100644 index 000000000..326fde1b3 --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.args @@ -0,0 +1,28 @@ +LC_ALL=C \ +PATH=/bin \ +HOME=/home/test \ +USER=test \ +LOGNAME=test \ +QEMU_AUDIO_DRV=none \ +/usr/bin/qemu-system-i686 \ +-name QEMUGuest1 \ +-S \ +-M pc \ +-m 214 \ +-smp 1,sockets=1,cores=1,threads=1 \ +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \ +-nographic \ +-nodefaults \ +-chardev socket,id=charmonitor,path=/tmp/lib/domain--1-QEMUGuest1/monitor.sock,\ +server,nowait \ +-mon chardev=charmonitor,id=monitor,mode=readline \ +-no-acpi \ +-boot c \ +-usb \ +-drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-ide0-0-0,\ +serial=XYZXYZXYZYXXYZYZYXYZY,cache=none \ +-device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 \ +-drive file=/dev/HostVG/QEMUGuest2,format=raw,if=none,media=cdrom,\ +id=drive-ide0-1-0,readonly=on \ +-device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 \ +-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 diff --git a/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.xml b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.xml new file mode 100644 index 000000000..677c2b0b7 --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.xml @@ -0,0 +1,36 @@ +<domain type='qemu'> + <name>QEMUGuest1</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219136</memory> + <currentMemory unit='KiB'>219136</currentMemory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='i686' machine='pc'>hvm</type> + <boot dev='hd'/> + </os> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + <emulator>/usr/bin/qemu-system-i686</emulator> + <disk type='block' device='disk'> + <driver name='qemu' type='raw'/> + <source dev='/dev/HostVG/QEMUGuest1'/> + <target dev='hda' bus='ide'/> + <shareable/> + <serial>XYZXYZXYZYXXYZYZYXYZY</serial> + <address type='drive' controller='0' bus='0' target='0' unit='0'/> + </disk> + <disk type='block' device='cdrom'> + <driver name='qemu' type='raw'/> + <source dev='/dev/HostVG/QEMUGuest2'/> + <target dev='hdc' bus='ide'/> + <readonly/> + <address type='drive' controller='0' bus='1' target='0' unit='0'/> + </disk> + <controller type='usb' index='0'/> + <controller type='ide' index='0'/> + <memballoon model='virtio'/> + </devices> +</domain> diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index bfced6dda..e72aabe20 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -909,6 +909,8 @@ mymain(void) DO_TEST("disk-drive-shared", QEMU_CAPS_DRIVE_SERIAL); DO_TEST_PARSE_ERROR("disk-drive-shared-qcow", NONE); + DO_TEST("disk-drive-shared-locking", + QEMU_CAPS_DRIVE_SERIAL, QEMU_CAPS_DRIVE_SHARE_RW); DO_TEST("disk-drive-error-policy-stop", QEMU_CAPS_MONITOR_JSON); DO_TEST("disk-drive-error-policy-enospace", -- 2.14.3
On Thu, Nov 16, 2017 at 13:47:53 +0100, Peter Krempa wrote:
Introduction of the disk image locking in qemu created a regression where disk shared access with <shareable/> would not work.
Since the disk locking is a desired feature, allow libvirt to configure qemu in such way that <shareable/> disks are exempt from write locks.
First few patches refactor some stuff so that it's less ugly.
This series also mandates that sharing is used only with 'raw' disks since other formats could corrupt metadata.
I'll be posting v2 shortly with a few improvements and fixes and also rebase to the current master.
participants (1)
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Peter Krempa