[libvirt PATCH 4/6] conf: implement support for vhostuser disk
Peter Krempa
pkrempa at redhat.com
Wed Feb 3 09:27:01 UTC 2021
On Tue, Feb 02, 2021 at 16:04:10 +0100, Pavel Hrdina wrote:
> Signed-off-by: Pavel Hrdina <phrdina at redhat.com>
> ---
>
> 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;
> }
/* vhost-user doesn't allow us to snapshot, disable snapshots by default */
> + 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);
[... see below note on forward decls.]
> +
> +
> +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);
'path' doesn't really need a temp variable.
> +
> + 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);
> +
> +
Preferably put the forward declarations at the top of the file.
[...]
> 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 */
s/drive/dirver/
> +
> + 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 */
s/driver/virtio/ ?
> +
> + 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;
This case must return NULL and an error per API contract of the function.
> +
> case VIR_STORAGE_TYPE_VOLUME:
> virReportError(VIR_ERR_INTERNAL_ERROR,
> _("storage source pool '%s' volume '%s' is not translated"),
More information about the libvir-list
mailing list