Re: [libvirt PATCH 4/6] conf: implement support for vhostuser disk

Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com&gt; --- We need to find a better way to validate different combinations of XML elements and attributes. src/conf/domain_conf.c | 85 ++++++++ src/conf/domain_validate.c | 187 ++++++++++++++++++ src/conf/storage_source_conf.c | 3 + src/conf/storage_source_conf.h | 4 + src/libxl/xen_xl.c | 1 + src/qemu/qemu_block.c | 4 + src/qemu/qemu_command.c | 1 + src/qemu/qemu_migration.c | 2 + src/qemu/qemu_snapshot.c | 4 + src/storage_file/storage_source.c | 1 + tests/qemuxml2argvdata/disk-vhostuser.xml | 29 +++ .../disk-vhostuser.x86_64-latest.xml | 48 +++++ tests/qemuxml2xmltest.c | 1 + 13 files changed, 370 insertions(+) create mode 100644 tests/qemuxml2argvdata/disk-vhostuser.xml create mode 100644 tests/qemuxml2xmloutdata/disk-vhostuser.x86_64-latest.xml diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 97fa841bff..43552c36c3 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -5228,6 +5228,11 @@ virDomainDiskDefPostParse(virDomainDiskDefPtr disk, disk->src->nvme->managed = VIR_TRISTATE_BOOL_YES; }

+ if (disk->src->type == VIR_STORAGE_TYPE_VHOST_USER && + disk->snapshot == VIR_DOMAIN_SNAPSHOT_LOCATION_DEFAULT) { + disk->snapshot = VIR_DOMAIN_SNAPSHOT_LOCATION_NONE; + } + if (disk->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE && virDomainDiskDefAssignAddress(xmlopt, disk, def) < 0) { return -1; @@ -8361,6 +8366,55 @@ virDomainDiskSourceNVMeParse(xmlNodePtr node, } +static int +virDomainChrSourceReconnectDefParseXML(virDomainChrSourceReconnectDefPtr def, + xmlNodePtr node, + xmlXPathContextPtr ctxt);

+ + +static int +virDomainDiskSourceVHostUserParse(xmlNodePtr node, + virStorageSourcePtr src, + virDomainXMLOptionPtr xmlopt, + xmlXPathContextPtr ctxt) +{ + g_autofree char *type = virXMLPropString(node, "type"); + g_autofree char *path = virXMLPropString(node, "path"); + + if (!type) { + virReportError(VIR_ERR_XML_ERROR, "%s", + _("missing 'type' attribute for vhostuser disk source")); + return -1; + } + + if (STRNEQ(type, "unix")) { + virReportError(VIR_ERR_XML_ERROR, "%s", + _("invalid 'type' attribute for vhostuser disk source")); + return -1; + } + + if (!path) { + virReportError(VIR_ERR_XML_ERROR, "%s", + _("missing 'path' attribute for vhostuser disk source")); + return -1; + } + + if (!(src->vhostuser = virDomainChrSourceDefNew(xmlopt))) + return -1; + + src->vhostuser->type = virDomainChrTypeFromString(type); + src->vhostuser->data.nix.path = g_steal_pointer(&path);

+ + if (virDomainChrSourceReconnectDefParseXML(&src->vhostuser->data.nix.reconnect, + node, + ctxt) < 0) { + return -1; + } + + return 0; +}

@@ -23939,6 +23997,23 @@ virDomainDiskSourceNVMeFormat(virBufferPtr attrBuf, } +static void +virDomainChrSourceReconnectDefFormat(virBufferPtr buf, + virDomainChrSourceReconnectDefPtr def); + +

@@ -23989,6 +24064,12 @@ virDomainDiskSourceFormatSlices(virBufferPtr buf, } +static void +virDomainChrSourceDefFormat(virBufferPtr buf, + virDomainChrSourceDefPtr def, + unsigned int flags); + +

diff --git a/src/conf/domain_validate.c b/src/conf/domain_validate.c index c56b03ff3a..c60300e750 100644 --- a/src/conf/domain_validate.c +++ b/src/conf/domain_validate.c

@@ -254,6 +255,187 @@ virDomainCheckVirtioOptionsAreAbsent(virDomainVirtioOptionsPtr virtio) } +static int +virDomainDiskVhostUserValidate(const virDomainDiskDef *disk) +{ + if (disk->bus != VIR_DOMAIN_DISK_BUS_VIRTIO) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("vhostuser disk supports only virtio bus")); + return -1; + } + + if (disk->snapshot != VIR_DOMAIN_SNAPSHOT_LOCATION_NONE) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("only snapshot=no is supported with vhostuser disk")); + return -1; + } + + /* Unsupported drive attributes */

+ + if (disk->cachemode != VIR_DOMAIN_DISK_CACHE_DEFAULT) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("cache is not supported with vhostuser disk")); + return -1; + } + + if (disk->error_policy || disk->rerror_policy) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("error_policy is not supported with vhostuser disk")); + return -1; + } + + if (disk->iomode) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("io is not supported with vhostuser disk")); + return -1; + } + + if (disk->ioeventfd != VIR_TRISTATE_SWITCH_ABSENT) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("ioeventfd is not supported with vhostuser disk")); + return -1; + } + + if (disk->copy_on_read) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("copy_on_read is not supported with vhostuser disk")); + return -1; + } + + if (disk->discard) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("discard is not supported with vhostuser disk")); + return -1; + } + + if (disk->iothread) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("iothread is not supported with vhostuser disk")); + return -1; + } + + if (disk->detect_zeroes) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("detect_zeroes is not supported with vhostuser disk")); + return -1; + } + + if (disk->src->metadataCacheMaxSize > 0) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("metadata_cache is not supported with vhostuser disk")); + return -1; + } + + /* Unsupported driver elements */

+ + if (disk->virtio) { + if (disk->virtio->iommu != VIR_TRISTATE_SWITCH_ABSENT) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("iommu is not supported with vhostuser disk")); + return -1; + } + + if (disk->virtio->ats != VIR_TRISTATE_SWITCH_ABSENT) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("ats is not supported with vhostuser disk")); + return -1; + } + + if (disk->virtio->packed != VIR_TRISTATE_SWITCH_ABSENT) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("packed is not supported with vhostuser disk")); + return -1; + } + }

diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c index 6456100170..f6e81a7503 100644 --- a/src/qemu/qemu_block.c +++ b/src/qemu/qemu_block.c @@ -1173,6 +1173,9 @@ qemuBlockStorageSourceGetBackendProps(virStorageSourcePtr src, return NULL; break; + case VIR_STORAGE_TYPE_VHOST_USER: + break;

+ case VIR_STORAGE_TYPE_VOLUME: virReportError(VIR_ERR_INTERNAL_ERROR, _("storage source pool '%s' volume '%s' is not translated"),