[libvirt] [PATCH v4 1/3] Add support for Veritas HyperScale (VxHS) block device protocol

Ashish Mittal ashmit602 at gmail.com
Fri Jun 30 02:02:39 UTC 2017


From: Ashish Mittal <ashish.mittal at veritas.com>

Sample XML for a VxHS disk:

<disk type='network' device='disk'>
  <driver name='qemu' type='raw' cache='none'/>
  <source protocol='vxhs' name='eb90327c-8302-4725-9e1b-4e85ed4dc251'>
    <host name='192.168.0.1' port='9999'/>
  </source>
  <backingStore/>
  <target dev='vda' bus='virtio'/>
  <serial>eb90327c-8302-4725-9e1b-4e85ed4dc251</serial>
  <alias name='virtio-disk0'/>
  <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</disk>

Signed-off-by: Ashish Mittal <ashish.mittal at veritas.com>
---
v2 changelog:
(1) Added code for JSON parsing of a VxHS vdisk.
(2) Added test case to verify JSON parsing.
(3) Added missing switch-case checks for VIR_STORAGE_NET_PROTOCOL_VXHS.
(4) Fixed line wrap in qemuxml2argv-disk-drive-network-vxhs.args.

v3 changelog:
(1) Implemented the modern syntax for VxHS disk specification.
(2) Changed qemuxml2argvdata VxHS test case to verify the new syntax.
(3) Added a negative test case to check failure when multiple hosts
    are specified for a VxHS disk.

v4 changelog:
(1) Fixes per review comments from v3.
(2) Had to remove a test from the previous version that checked for
    error when multiple hosts are specified for VxHS device.
    This started failing virschematest with the error
    "XML document failed to validate against schema" as the
    docs/schemas/domain.rng specifies only a single host.

 docs/formatdomain.html.in                          | 15 ++++-
 docs/schemas/domaincommon.rng                      | 13 ++++
 src/libxl/libxl_conf.c                             |  1 +
 src/qemu/qemu_command.c                            | 70 ++++++++++++++++++++++
 src/qemu/qemu_driver.c                             |  3 +
 src/qemu/qemu_parse_command.c                      | 25 ++++++++
 src/util/virstoragefile.c                          | 64 +++++++++++++++++++-
 src/util/virstoragefile.h                          |  1 +
 src/xenconfig/xen_xl.c                             |  1 +
 .../qemuargv2xml-disk-drive-network-vxhs-fail.args | 24 ++++++++
 tests/qemuargv2xmltest.c                           | 17 +++++-
 .../qemuxml2argv-disk-drive-network-vxhs.args      | 25 ++++++++
 .../qemuxml2argv-disk-drive-network-vxhs.xml       | 34 +++++++++++
 tests/qemuxml2argvtest.c                           |  1 +
 tests/virstoragetest.c                             | 19 ++++++
 15 files changed, 308 insertions(+), 5 deletions(-)
 create mode 100644 tests/qemuargv2xmldata/qemuargv2xml-disk-drive-network-vxhs-fail.args
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-vxhs.args
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-vxhs.xml

diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 36bea67..62d67f4 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -2501,9 +2501,9 @@
               <dd>
               The <code>protocol</code> attribute specifies the protocol to
               access to the requested image. Possible values are "nbd",
-              "iscsi", "rbd", "sheepdog" or "gluster".  If the
-              <code>protocol</code> attribute is "rbd", "sheepdog" or
-              "gluster", an additional attribute <code>name</code> is
+              "iscsi", "rbd", "sheepdog", "gluster" or "vxhs".  If the
+              <code>protocol</code> attribute is "rbd", "sheepdog", "gluster"
+              or "vxhs", an additional attribute <code>name</code> is
               mandatory to specify which volume/image will be used. For "nbd",
               the <code>name</code> attribute is optional. For "iscsi"
               (<span class="since">since 1.0.4</span>), the <code>name</code>
@@ -2511,6 +2511,9 @@
               target's name by a slash (e.g.,
               <code>iqn.2013-07.com.example:iscsi-pool/1</code>). If not
               specified, the default LUN is zero.
+              For "vxhs" (<span class="since">since 3.3.0</span>), the
+              <code>name</code> is the UUID of the volume, assigned by the
+              HyperScale sever.
               <span class="since">Since 0.8.7</span>
               </dd>
             <dt><code>volume</code></dt>
@@ -2613,6 +2616,12 @@
                 <td> one or more (<span class="since">Since 2.1.0</span>), just one prior to that </td>
                 <td> 24007 </td>
               </tr>
+              <tr>
+                <td> vxhs </td>
+                <td> a server running Veritas HyperScale daemon </td>
+                <td> only one </td>
+                <td> 9999 </td>
+              </tr>
             </table>
             <p>
             gluster supports "tcp", "rdma", "unix" as valid values for the
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index bdf7103..7525a2a 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -1613,6 +1613,18 @@
     </element>
   </define>
 
+  <define name="diskSourceNetworkProtocolVxHS">
+    <element name="source">
+      <attribute name="protocol">
+        <choice>
+          <value>vxhs</value>
+        </choice>
+      </attribute>
+      <attribute name="name"/>
+        <ref name="diskSourceNetworkHost"/>
+    </element>
+  </define>
+
   <define name="diskSourceNetwork">
     <attribute name="type">
       <value>network</value>
@@ -1623,6 +1635,7 @@
       <ref name="diskSourceNetworkProtocolRBD"/>
       <ref name="diskSourceNetworkProtocolHTTP"/>
       <ref name="diskSourceNetworkProtocolSimple"/>
+      <ref name="diskSourceNetworkProtocolVxHS"/>
     </choice>
   </define>
 
diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c
index 938e09d..f12c796 100644
--- a/src/libxl/libxl_conf.c
+++ b/src/libxl/libxl_conf.c
@@ -665,6 +665,7 @@ libxlMakeNetworkDiskSrcStr(virStorageSourcePtr src,
     case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
     case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
     case VIR_STORAGE_NET_PROTOCOL_SSH:
+    case VIR_STORAGE_NET_PROTOCOL_VXHS:
     case VIR_STORAGE_NET_PROTOCOL_LAST:
     case VIR_STORAGE_NET_PROTOCOL_NONE:
         virReportError(VIR_ERR_NO_SUPPORT,
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index c53ab97..8e00782 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -524,6 +524,7 @@ qemuNetworkDriveGetPort(int protocol,
             return 0;
 
         case VIR_STORAGE_NET_PROTOCOL_RBD:
+        case VIR_STORAGE_NET_PROTOCOL_VXHS:
         case VIR_STORAGE_NET_PROTOCOL_LAST:
         case VIR_STORAGE_NET_PROTOCOL_NONE:
             /* not applicable */
@@ -931,6 +932,65 @@ qemuBuildGlusterDriveJSON(virStorageSourcePtr src)
 }
 
 
+#define QEMU_DEFAULT_VXHS_PORT "9999"
+
+/* Build the VxHS host object */
+static virJSONValuePtr
+qemuBuildVxHSDriveJSONHost(virStorageSourcePtr src)
+{
+    virJSONValuePtr server = NULL;
+    virStorageNetHostDefPtr host;
+    const char *portstr;
+
+    if (src->nhosts != 1) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("protocol VxHS accepts only one host"));
+        goto cleanup;
+    }
+
+    host = src->hosts;
+    portstr = host->port;
+
+    if (!portstr)
+        portstr = QEMU_DEFAULT_VXHS_PORT;
+
+    if (virJSONValueObjectCreate(&server,
+                                 "s:host", host->name,
+                                 "s:port", portstr,
+                                 NULL) < 0)
+        server = NULL;
+
+ cleanup:
+    return server;
+}
+
+
+static virJSONValuePtr
+qemuBuildVxHSDriveJSON(virStorageSourcePtr src)
+{
+    const char *protocol = virStorageNetProtocolTypeToString(src->protocol);
+    virJSONValuePtr server = NULL;
+    virJSONValuePtr ret = NULL;
+
+    if (!(server = qemuBuildVxHSDriveJSONHost(src)))
+        return NULL;
+
+    /* VxHS disk specification example:
+     * { driver:"vxhs",
+     *   vdisk-id:"eb90327c-8302-4725-4e85ed4dc251",
+     *   server.host:"1.2.3.4",
+     *   server.port:1234}
+     */
+    if (virJSONValueObjectCreate(&ret,
+                                 "s:driver", protocol,
+                                 "s:vdisk-id", src->path,
+                                 "a:server", server, NULL) < 0)
+        virJSONValueFree(server);
+
+    return ret;
+}
+
+
 static char *
 qemuBuildNetworkDriveURI(virStorageSourcePtr src,
                          qemuDomainSecretInfoPtr secinfo)
@@ -1136,6 +1196,11 @@ qemuBuildNetworkDriveStr(virStorageSourcePtr src,
             ret = virBufferContentAndReset(&buf);
             break;
 
+        case VIR_STORAGE_NET_PROTOCOL_VXHS:
+            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                           _("'VxHS' protocol does not support URI syntax"));
+            goto cleanup;
+
         case VIR_STORAGE_NET_PROTOCOL_SSH:
             virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                            _("'ssh' protocol is not yet supported"));
@@ -1180,6 +1245,11 @@ qemuGetDriveSourceProps(virStorageSourcePtr src,
             if (!(fileprops = qemuBuildGlusterDriveJSON(src)))
                 return -1;
         }
+
+        if (src->protocol == VIR_STORAGE_NET_PROTOCOL_VXHS) {
+            if (!(fileprops = qemuBuildVxHSDriveJSON(src)))
+                return -1;
+        }
         break;
     }
 
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index cdb727b..d43de69 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -13683,6 +13683,7 @@ qemuDomainSnapshotPrepareDiskExternalBackingInactive(virDomainDiskDefPtr disk)
         case VIR_STORAGE_NET_PROTOCOL_FTPS:
         case VIR_STORAGE_NET_PROTOCOL_TFTP:
         case VIR_STORAGE_NET_PROTOCOL_SSH:
+        case VIR_STORAGE_NET_PROTOCOL_VXHS:
         case VIR_STORAGE_NET_PROTOCOL_LAST:
             virReportError(VIR_ERR_INTERNAL_ERROR,
                            _("external inactive snapshots are not supported on "
@@ -13746,6 +13747,7 @@ qemuDomainSnapshotPrepareDiskExternalOverlayActive(virDomainSnapshotDiskDefPtr d
         case VIR_STORAGE_NET_PROTOCOL_FTPS:
         case VIR_STORAGE_NET_PROTOCOL_TFTP:
         case VIR_STORAGE_NET_PROTOCOL_SSH:
+        case VIR_STORAGE_NET_PROTOCOL_VXHS:
         case VIR_STORAGE_NET_PROTOCOL_LAST:
             virReportError(VIR_ERR_INTERNAL_ERROR,
                            _("external active snapshots are not supported on "
@@ -13891,6 +13893,7 @@ qemuDomainSnapshotPrepareDiskInternal(virConnectPtr conn,
         case VIR_STORAGE_NET_PROTOCOL_FTPS:
         case VIR_STORAGE_NET_PROTOCOL_TFTP:
         case VIR_STORAGE_NET_PROTOCOL_SSH:
+        case VIR_STORAGE_NET_PROTOCOL_VXHS:
         case VIR_STORAGE_NET_PROTOCOL_LAST:
             virReportError(VIR_ERR_INTERNAL_ERROR,
                            _("internal inactive snapshots are not supported on "
diff --git a/src/qemu/qemu_parse_command.c b/src/qemu/qemu_parse_command.c
index af9063c..aa15225 100644
--- a/src/qemu/qemu_parse_command.c
+++ b/src/qemu/qemu_parse_command.c
@@ -263,6 +263,17 @@ qemuParseNBDString(virDomainDiskDefPtr disk)
     return -1;
 }
 
+static int
+qemuParseVxHSString(virDomainDiskDefPtr def)
+{
+    virURIPtr uri = NULL;
+
+    if (!(uri = virURIParse(def->src->path)))
+        return -1;
+
+    return qemuParseDriveURIString(def, uri, "vxhs");
+}
+
 
 /*
  * This method takes a string representing a QEMU command line ARGV set
@@ -737,6 +748,11 @@ qemuParseCommandLineDisk(virDomainXMLOptionPtr xmlopt,
                         if (VIR_STRDUP(def->src->path, vdi) < 0)
                             goto error;
                     }
+                } else if (STRPREFIX(def->src->path, "vxhs:")) {
+                    virReportError(VIR_ERR_INTERNAL_ERROR,
+                                   _("VxHS protocol does not support URI syntax '%s'"),
+                                   def->src->path);
+                    goto error;
                 } else {
                     def->src->type = VIR_STORAGE_TYPE_FILE;
                 }
@@ -1945,6 +1961,10 @@ qemuParseCommandLine(virCapsPtr caps,
                 disk->src->type = VIR_STORAGE_TYPE_NETWORK;
                 disk->src->protocol = VIR_STORAGE_NET_PROTOCOL_SHEEPDOG;
                 val += strlen("sheepdog:");
+            } else if (STRPREFIX(val, "vxhs:")) {
+                disk->src->type = VIR_STORAGE_TYPE_NETWORK;
+                disk->src->protocol = VIR_STORAGE_NET_PROTOCOL_VXHS;
+                val += strlen("vxhs:");
             } else {
                 disk->src->type = VIR_STORAGE_TYPE_FILE;
             }
@@ -2021,6 +2041,11 @@ qemuParseCommandLine(virCapsPtr caps,
                         goto error;
 
                     break;
+                case VIR_STORAGE_NET_PROTOCOL_VXHS:
+                    if (qemuParseVxHSString(disk) < 0)
+                        goto error;
+
+                    break;
                 case VIR_STORAGE_NET_PROTOCOL_HTTP:
                 case VIR_STORAGE_NET_PROTOCOL_HTTPS:
                 case VIR_STORAGE_NET_PROTOCOL_FTP:
diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c
index f0ed5c6..eb36694 100644
--- a/src/util/virstoragefile.c
+++ b/src/util/virstoragefile.c
@@ -85,7 +85,8 @@ VIR_ENUM_IMPL(virStorageNetProtocol, VIR_STORAGE_NET_PROTOCOL_LAST,
               "ftp",
               "ftps",
               "tftp",
-              "ssh")
+              "ssh",
+              "vxhs")
 
 VIR_ENUM_IMPL(virStorageNetHostTransport, VIR_STORAGE_NET_HOST_TRANS_LAST,
               "tcp",
@@ -2719,6 +2720,7 @@ virStorageSourceParseBackingColon(virStorageSourcePtr src,
     case VIR_STORAGE_NET_PROTOCOL_ISCSI:
     case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
     case VIR_STORAGE_NET_PROTOCOL_SSH:
+    case VIR_STORAGE_NET_PROTOCOL_VXHS:
         virReportError(VIR_ERR_INTERNAL_ERROR,
                        _("malformed backing store path for protocol %s"),
                        protocol);
@@ -3219,6 +3221,65 @@ virStorageSourceParseBackingJSONRaw(virStorageSourcePtr src,
     return virStorageSourceParseBackingJSONInternal(src, json);
 }
 
+#define QEMU_DEFAULT_VXHS_PORT "9999"
+
+static int
+virStorageSourceParseBackingJSONVxHS(virStorageSourcePtr src,
+                                     virJSONValuePtr json,
+                                     int opaque ATTRIBUTE_UNUSED)
+{
+    const char *uri = virJSONValueObjectGetString(json, "filename");
+    const char *vdisk_id = virJSONValueObjectGetString(json, "vdisk-id");
+    virJSONValuePtr server = virJSONValueObjectGetObject(json, "server");
+    const char *hostname;
+    const char *port;
+
+    /* Check for legacy URI based syntax passed via 'filename' option */
+    if (uri) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("'VxHS' protocol does not support URI syntax"));
+        return -1;
+    }
+
+    if (!vdisk_id || !server) {
+        virReportError(VIR_ERR_INVALID_ARG, "%s",
+                       _("missing 'vdisk-id' or 'server' attribute in "
+                         "JSON backing definition for VxHS volume"));
+        return -1;
+    }
+
+    hostname = virJSONValueObjectGetString(server, "host");
+    port = virJSONValueObjectGetString(server, "port");
+
+    if (!hostname) {
+        virReportError(VIR_ERR_INVALID_ARG, "%s",
+                       _("missing hostname for tcp backing server in "
+                       "JSON backing definition for VxHS volume"));
+        return -1;
+    }
+
+    if (!port)
+        port = QEMU_DEFAULT_VXHS_PORT;
+
+    src->type = VIR_STORAGE_TYPE_NETWORK;
+    src->protocol = VIR_STORAGE_NET_PROTOCOL_VXHS;
+
+    if (VIR_STRDUP(src->path, vdisk_id) < 0)
+        return -1;
+
+    if (VIR_ALLOC_N(src->hosts, 1) < 0)
+        return -1;
+    src->nhosts = 1;
+
+    src->hosts[0].transport = VIR_STORAGE_NET_HOST_TRANS_TCP;
+
+    if (VIR_STRDUP(src->hosts[0].name, hostname) < 0 ||
+        VIR_STRDUP(src->hosts[0].port, port) < 0)
+        return -1;
+
+    return 0;
+}
+
 struct virStorageSourceJSONDriverParser {
     const char *drvname;
     int (*func)(virStorageSourcePtr src, virJSONValuePtr json, int opaque);
@@ -3241,6 +3302,7 @@ static const struct virStorageSourceJSONDriverParser jsonParsers[] = {
     {"ssh", virStorageSourceParseBackingJSONSSH, 0},
     {"rbd", virStorageSourceParseBackingJSONRBD, 0},
     {"raw", virStorageSourceParseBackingJSONRaw, 0},
+    {"vxhs", virStorageSourceParseBackingJSONVxHS, 0},
 };
 
 
diff --git a/src/util/virstoragefile.h b/src/util/virstoragefile.h
index 0bff867..0b6e409 100644
--- a/src/util/virstoragefile.h
+++ b/src/util/virstoragefile.h
@@ -134,6 +134,7 @@ typedef enum {
     VIR_STORAGE_NET_PROTOCOL_FTPS,
     VIR_STORAGE_NET_PROTOCOL_TFTP,
     VIR_STORAGE_NET_PROTOCOL_SSH,
+    VIR_STORAGE_NET_PROTOCOL_VXHS,
 
     VIR_STORAGE_NET_PROTOCOL_LAST
 } virStorageNetProtocol;
diff --git a/src/xenconfig/xen_xl.c b/src/xenconfig/xen_xl.c
index cac440c..8bd6f3e 100644
--- a/src/xenconfig/xen_xl.c
+++ b/src/xenconfig/xen_xl.c
@@ -1024,6 +1024,7 @@ xenFormatXLDiskSrcNet(virStorageSourcePtr src)
     case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
     case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
     case VIR_STORAGE_NET_PROTOCOL_SSH:
+    case VIR_STORAGE_NET_PROTOCOL_VXHS:
     case VIR_STORAGE_NET_PROTOCOL_LAST:
     case VIR_STORAGE_NET_PROTOCOL_NONE:
         virReportError(VIR_ERR_NO_SUPPORT,
diff --git a/tests/qemuargv2xmldata/qemuargv2xml-disk-drive-network-vxhs-fail.args b/tests/qemuargv2xmldata/qemuargv2xml-disk-drive-network-vxhs-fail.args
new file mode 100644
index 0000000..f6e3e37
--- /dev/null
+++ b/tests/qemuargv2xmldata/qemuargv2xml-disk-drive-network-vxhs-fail.args
@@ -0,0 +1,24 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/home/test \
+USER=test \
+LOGNAME=test \
+QEMU_AUDIO_DRV=none \
+/usr/libexec/qemu-kvm \
+-name QEMUGuest1 \
+-S \
+-M pc \
+-cpu qemu32 \
+-m 214 \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-nographic \
+-nodefaults \
+-monitor unix:/tmp/lib/domain--1-QEMUGuest1/monitor.sock,server,nowait \
+-no-acpi \
+-boot c \
+-usb \
+-drive file=vxhs://192.168.0.1:9999/eb90327c-8302-4725-9e1b-4e85ed4dc251,\
+format=raw,if=none,id=drive-virtio-disk0,cache=none \
+-device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,\
+id=virtio-disk0
diff --git a/tests/qemuargv2xmltest.c b/tests/qemuargv2xmltest.c
index 1adbcfe..fc15714 100644
--- a/tests/qemuargv2xmltest.c
+++ b/tests/qemuargv2xmltest.c
@@ -50,6 +50,7 @@ static int testSanitizeDef(virDomainDefPtr vmdef)
 
 typedef enum {
     FLAG_EXPECT_WARNING     = 1 << 0,
+    FLAG_EXPECT_FAIL        = 1 << 1,
 } virQemuXML2ArgvTestFlags;
 
 static int testCompareXMLToArgvFiles(const char *xmlfile,
@@ -67,7 +68,16 @@ static int testCompareXMLToArgvFiles(const char *xmlfile,
 
     if (!(vmdef = qemuParseCommandLineString(driver.caps, driver.xmlopt,
                                              cmd, NULL, NULL, NULL)))
-        goto fail;
+    {
+        if (flags & FLAG_EXPECT_FAIL) {
+            if (virTestLogContentAndReset() == NULL)
+                goto fail;
+
+            VIR_TEST_DEBUG("Got expected error from "
+                        "qemuParseCommandLineString:\n");
+            goto out;
+        }
+    }
 
     if (!virTestOOMActive()) {
         if ((log = virTestLogContentAndReset()) == NULL)
@@ -106,6 +116,7 @@ static int testCompareXMLToArgvFiles(const char *xmlfile,
     if (virTestCompareToFile(actualxml, xmlfile) < 0)
         goto fail;
 
+ out:
     ret = 0;
 
  fail:
@@ -166,6 +177,9 @@ mymain(void)
 # define DO_TEST(name)                                                  \
         DO_TEST_FULL(name, 0)
 
+# define DO_TEST_FAIL(name)                                             \
+        DO_TEST_FULL(name, FLAG_EXPECT_FAIL)
+
     setenv("PATH", "/bin", 1);
     setenv("USER", "test", 1);
     setenv("LOGNAME", "test", 1);
@@ -220,6 +234,7 @@ mymain(void)
     /* older format using CEPH_ARGS env var */
     DO_TEST("disk-drive-network-rbd-ceph-env");
     DO_TEST("disk-drive-network-sheepdog");
+    DO_TEST_FAIL("disk-drive-network-vxhs-fail");
     DO_TEST("disk-usb");
     DO_TEST("graphics-vnc");
     DO_TEST("graphics-vnc-socket");
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-vxhs.args b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-vxhs.args
new file mode 100644
index 0000000..41dffff
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-vxhs.args
@@ -0,0 +1,25 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/home/test \
+USER=test \
+LOGNAME=test \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu-system-x86_64 \
+-name QEMUGuest1 \
+-S \
+-M pc \
+-cpu qemu32 \
+-m 214 \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-nographic \
+-nodefaults \
+-monitor unix:/tmp/lib/domain--1-QEMUGuest1/monitor.sock,server,nowait \
+-no-acpi \
+-boot c \
+-usb \
+-drive file.driver=vxhs,file.vdisk-id=eb90327c-8302-4725-9e1b-4e85ed4dc251,\
+file.server.host=192.168.0.1,file.server.port=9999,format=raw,if=none,\
+id=drive-virtio-disk0,cache=none \
+-device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,\
+id=virtio-disk0
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-vxhs.xml b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-vxhs.xml
new file mode 100644
index 0000000..a488770
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-vxhs.xml
@@ -0,0 +1,34 @@
+<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-x86_64</emulator>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='raw' cache='none'/>
+      <source protocol='vxhs' name='eb90327c-8302-4725-9e1b-4e85ed4dc251'>
+        <host name='192.168.0.1' port='9999'/>
+      </source>
+      <backingStore/>
+      <target dev='vda' bus='virtio'/>
+      <serial>eb90327c-8302-4725-9e1b-4e85ed4dc251</serial>
+      <alias name='virtio-disk0'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
+    </disk>
+    <controller type='usb' index='0'/>
+    <controller type='pci' index='0' model='pci-root'/>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <memballoon model='none'/>
+  </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 27eea70..0a1ef01 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -903,6 +903,7 @@ mymain(void)
 # endif
     DO_TEST("disk-drive-network-rbd-ipv6", NONE);
     DO_TEST_FAILURE("disk-drive-network-rbd-no-colon", NONE);
+    DO_TEST("disk-drive-network-vxhs", NONE);
     DO_TEST("disk-drive-no-boot",
             QEMU_CAPS_BOOTINDEX);
     DO_TEST_PARSE_ERROR("disk-device-lun-type-invalid",
diff --git a/tests/virstoragetest.c b/tests/virstoragetest.c
index f344083..3a4e03b 100644
--- a/tests/virstoragetest.c
+++ b/tests/virstoragetest.c
@@ -1575,6 +1575,25 @@ mymain(void)
                        "<source protocol='sheepdog' name='test'>\n"
                        "  <host name='example.com' port='321'/>\n"
                        "</source>\n");
+    TEST_BACKING_PARSE("json:{ \"file\": { "
+                                "\"driver\": \"raw\","
+                                "\"file\": {"
+                                    "\"driver\": \"file\","
+                                    "\"filename\": \"/path/to/file\" } } }",
+                       "<source file='/path/to/file'/>\n");
+    TEST_BACKING_PARSE("json:{\"file\":{\"driver\":\"vxhs\","
+                                       "\"vdisk-id\":\"c6718f6b-0401-441d-a8c3-1f0064d75ee0\","
+                                       "\"server\": { \"host\":\"example.com\","
+                                                      "\"port\":\"1234\""
+                                                   "}"
+                                      "}"
+                            "}",
+                       "<source protocol='vxhs' name='c6718f6b-0401-441d-a8c3-1f0064d75ee0'>\n"
+                       "  <host name='example.com' port='1234'/>\n"
+                       "</source>\n");
+    TEST_BACKING_PARSE("json:{\"file.driver\":\"vxhs\","
+                             "\"file.filename\":\"vxhs://192.168.0.1:9999/c6718f6b-0401-441d-a8c3-1f0064d75ee0\""
+                            "}", NULL);
 #endif /* WITH_YAJL */
 
  cleanup:
-- 
2.5.5




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