The target= setting in xl disk configuration can be used to encode
meta info that is meaningful to a backend. Leverage this fact to
support qdisk network disk types such as rbd. E.g. <disk> config
such as
<disk type='network' device='disk'>
<driver name='qemu' type='raw'/>
<source protocol='rbd' name='pool/image'>
<host name='mon1.example.org' port='6321'/>
<host name='mon2.example.org' port='6322'/>
<host name='mon3.example.org' port='6322'/>
</source>
<target dev='hdb' bus='ide'/>
<address type='drive' controller='0' bus='0' target='0' unit='1'/>
</disk>
can be converted to the following xl config (and vice versa)
disk = [ "format=raw,vdev=hdb,access=rw,backendtype=qdisk,
target=rbd:pool/image:auth_supported=none:mon_host=mon1.example.org\\:6321\\;mon2.example.org\\:6322\\;mon3.example.org\\:6322"
]
Note that in xl disk config, a literal backslash in target= must
be escaped with a backslash. Conversion of <auth> config is not
handled in this patch, but can be done in a follow-up patch.
Also add a test for the conversions.
Signed-off-by: Jim Fehlig <jfehlig@xxxxxxxx>
---
v2:
Change commit msg, test, and code to escape literal backslash
with a backslash.
src/xenconfig/xen_xl.c | 153 +++++++++++++++++++++--
tests/xlconfigdata/test-rbd-multihost-noauth.cfg | 26 ++++
tests/xlconfigdata/test-rbd-multihost-noauth.xml | 51 ++++++++
tests/xlconfigtest.c | 1 +
4 files changed, 224 insertions(+), 7 deletions(-)
diff --git a/src/xenconfig/xen_xl.c b/src/xenconfig/xen_xl.c
index f3e8b55..585ef9b 100644
--- a/src/xenconfig/xen_xl.c
+++ b/src/xenconfig/xen_xl.c
@@ -246,6 +246,32 @@ xenParseXLSpice(virConfPtr conf, virDomainDefPtr def)
return -1;
}
+
+static int
+xenParseXLDiskSrc(virDomainDiskDefPtr disk, char *srcstr)
+{
+ char *tmpstr = NULL;
+ int ret = -1;
+
+ if (STRPREFIX(srcstr, "rbd:")) {
+ tmpstr = virStringReplace(srcstr, "\\\\", "\\");
+
+ virDomainDiskSetType(disk, VIR_STORAGE_TYPE_NETWORK);
+ disk->src->protocol = VIR_STORAGE_NET_PROTOCOL_RBD;
+ ret = virStorageSourceParseRBDColonString(tmpstr, disk->src);
+ } else {
+ if (virDomainDiskSetSource(disk, srcstr) < 0)
+ goto cleanup;
+
+ ret = 0;
+ }
+
+ cleanup:
+ VIR_FREE(tmpstr);
+ return ret;
+}
+
+
/*
* For details on xl disk config syntax, see
* docs/misc/xl-disk-configuration.txt in the Xen sources. The important
@@ -311,12 +337,12 @@ xenParseXLDisk(virConfPtr conf, virDomainDefPtr def)
if (!(disk = virDomainDiskDefNew(NULL)))
goto fail;
+ if (xenParseXLDiskSrc(disk, libxldisk->pdev_path) < 0)
+ goto fail;
+
if (VIR_STRDUP(disk->dst, libxldisk->vdev) < 0)
goto fail;
- if (virDomainDiskSetSource(disk, libxldisk->pdev_path) < 0)
- goto fail;
-
disk->src->readonly = !libxldisk->readwrite;
disk->removable = libxldisk->removable;
@@ -358,7 +384,8 @@ xenParseXLDisk(virConfPtr conf, virDomainDefPtr def)
case LIBXL_DISK_BACKEND_UNKNOWN:
if (virDomainDiskSetDriver(disk, "qemu") < 0)
goto fail;
- virDomainDiskSetType(disk, VIR_STORAGE_TYPE_FILE);
+ if (virDomainDiskGetType(disk) == VIR_STORAGE_TYPE_NONE)
+ virDomainDiskSetType(disk, VIR_STORAGE_TYPE_FILE);
break;
case LIBXL_DISK_BACKEND_TAP:
@@ -578,14 +605,115 @@ xenFormatXLOS(virConfPtr conf, virDomainDefPtr def)
}
+static char *
+xenFormatXLDiskSrcNet(virStorageSourcePtr src)
+{
+ char *ret = NULL;
+ virBuffer buf = VIR_BUFFER_INITIALIZER;
+ size_t i;
+
+ switch ((virStorageNetProtocol) src->protocol) {
+ case VIR_STORAGE_NET_PROTOCOL_NBD:
+ case VIR_STORAGE_NET_PROTOCOL_HTTP:
+ case VIR_STORAGE_NET_PROTOCOL_HTTPS:
+ case VIR_STORAGE_NET_PROTOCOL_FTP:
+ case VIR_STORAGE_NET_PROTOCOL_FTPS:
+ case VIR_STORAGE_NET_PROTOCOL_TFTP:
+ case VIR_STORAGE_NET_PROTOCOL_ISCSI:
+ case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
+ case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+ case VIR_STORAGE_NET_PROTOCOL_LAST:
+ case VIR_STORAGE_NET_PROTOCOL_NONE:
+ virReportError(VIR_ERR_NO_SUPPORT,
+ _("Unsupported network block protocol '%s'"),
+ virStorageNetProtocolTypeToString(src->protocol));
+ goto cleanup;
+
+ case VIR_STORAGE_NET_PROTOCOL_RBD:
+ if (strchr(src->path, ':')) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("':' not allowed in RBD source volume name '%s'"),
+ src->path);
+ goto cleanup;
+ }
+
+ virBufferStrcat(&buf, "rbd:", src->path, NULL);
+
+ virBufferAddLit(&buf, ":auth_supported=none");
+
+ if (src->nhosts > 0) {
+ virBufferAddLit(&buf, ":mon_host=");
+ for (i = 0; i < src->nhosts; i++) {
+ if (i)
+ virBufferAddLit(&buf, "\\\\;");
+
+ /* assume host containing : is ipv6 */
+ if (strchr(src->hosts[i].name, ':'))
+ virBufferEscape(&buf, '\\', ":", "[%s]",
+ src->hosts[i].name);
+ else
+ virBufferAsprintf(&buf, "%s", src->hosts[i].name);
+
+ if (src->hosts[i].port)
+ virBufferAsprintf(&buf, "\\\\:%s", src->hosts[i].port);
+ }
+ }
+
+ if (virBufferCheckError(&buf) < 0)
+ goto cleanup;
+
+ ret = virBufferContentAndReset(&buf);
+ break;
+ }
+
+ cleanup:
+ virBufferFreeAndReset(&buf);
+
+ return ret;
+}
+
+
+static int
+xenFormatXLDiskSrc(virStorageSourcePtr src, char **srcstr)
+{
+ int actualType = virStorageSourceGetActualType(src);
+
+ *srcstr = NULL;
+
+ if (virStorageSourceIsEmpty(src))
+ return 0;
+
+ switch ((virStorageType) actualType) {
+ case VIR_STORAGE_TYPE_BLOCK:
+ case VIR_STORAGE_TYPE_FILE:
+ case VIR_STORAGE_TYPE_DIR:
+ if (VIR_STRDUP(*srcstr, src->path) < 0)
+ return -1;
+ break;
+
+ case VIR_STORAGE_TYPE_NETWORK:
+ if (!(*srcstr = xenFormatXLDiskSrcNet(src)))
+ return -1;
+ break;
+
+ case VIR_STORAGE_TYPE_VOLUME:
+ case VIR_STORAGE_TYPE_NONE:
+ case VIR_STORAGE_TYPE_LAST:
+ break;
+ }
+
+ return 0;
+}
+
+
static int
xenFormatXLDisk(virConfValuePtr list, virDomainDiskDefPtr disk)
{
virBuffer buf = VIR_BUFFER_INITIALIZER;
virConfValuePtr val, tmp;
- const char *src = virDomainDiskGetSource(disk);
int format = virDomainDiskGetFormat(disk);
const char *driver = virDomainDiskGetDriver(disk);
+ char *target = NULL;
/* format */
virBufferAddLit(&buf, "format=");
@@ -637,8 +765,18 @@ xenFormatXLDisk(virConfValuePtr list, virDomainDiskDefPtr disk)
if (disk->device == VIR_DOMAIN_DISK_DEVICE_CDROM)
virBufferAddLit(&buf, "devtype=cdrom,");
- /* target */
- virBufferAsprintf(&buf, "target=%s", src);
+ /*
+ * target
+ * From $xensrc/docs/misc/xl-disk-configuration.txt:
+ * When this parameter is specified by name, ie with the "target="
+ * syntax in the configuration file, it consumes the whole rest of the
+ * <diskspec> including trailing whitespaces. Therefore in that case
+ * it must come last.
+ */
+ if (xenFormatXLDiskSrc(disk->src, &target) < 0)
+ goto cleanup;
+
+ virBufferAsprintf(&buf, "target=%s", target);
if (virBufferCheckError(&buf) < 0)
goto cleanup;
@@ -658,6 +796,7 @@ xenFormatXLDisk(virConfValuePtr list, virDomainDiskDefPtr disk)
return 0;
cleanup:
+ VIR_FREE(target);
virBufferFreeAndReset(&buf);
return -1;
}
diff --git a/tests/xlconfigdata/test-rbd-multihost-noauth.cfg b/tests/xlconfigdata/test-rbd-multihost-noauth.cfg
new file mode 100644
index 0000000..cfe00e5
--- /dev/null
+++ b/tests/xlconfigdata/test-rbd-multihost-noauth.cfg
@@ -0,0 +1,26 @@
+name = "XenGuest2"
+uuid = "c7a5fdb2-cdaf-9455-926a-d65c16db1809"
+maxmem = 579
+memory = 394
+vcpus = 1
+pae = 1
+acpi = 1
+apic = 1
+hap = 0
+viridian = 0
+rtc_timeoffset = 0
+localtime = 0
+on_poweroff = "destroy"
+on_reboot = "restart"
+on_crash = "restart"
+device_model = "/usr/lib/xen/bin/qemu-dm"
+sdl = 0
+vnc = 1
+vncunused = 1
+vnclisten = "127.0.0.1"
+vif = [ "mac=00:16:3e:66:92:9c,bridge=xenbr1,script=vif-bridge,model=e1000" ]
+parallel = "none"
+serial = "none"
+builder = "hvm"
+boot = "d"
+disk = [ "format=raw,vdev=hda,access=rw,backendtype=phy,target=/dev/HostVG/XenGuest2", "format=raw,vdev=hdb,access=rw,backendtype=qdisk,target=rbd:pool/image:auth_supported=none:mon_host=mon1.example.org\\:6321\\;mon2.example.org\\:6322\\;mon3.example.org\\:6322" ]
diff --git a/tests/xlconfigdata/test-rbd-multihost-noauth.xml b/tests/xlconfigdata/test-rbd-multihost-noauth.xml
new file mode 100644
index 0000000..720265e
--- /dev/null
+++ b/tests/xlconfigdata/test-rbd-multihost-noauth.xml
@@ -0,0 +1,51 @@
+<domain type='xen'>
+ <name>XenGuest2</name>
+ <uuid>c7a5fdb2-cdaf-9455-926a-d65c16db1809</uuid>
+ <memory unit='KiB'>592896</memory>
+ <currentMemory unit='KiB'>403456</currentMemory>
+ <vcpu placement='static'>1</vcpu>
+ <os>
+ <type arch='x86_64' machine='xenfv'>hvm</type>
+ <loader type='rom'>/usr/lib/xen/boot/hvmloader</loader>
+ <boot dev='cdrom'/>
+ </os>
+ <features>
+ <acpi/>
+ <apic/>
+ <pae/>
+ </features>
+ <clock offset='variable' adjustment='0' basis='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>restart</on_crash>
+ <devices>
+ <emulator>/usr/lib/xen/bin/qemu-dm</emulator>
+ <disk type='block' device='disk'>
+ <driver name='phy' type='raw'/>
+ <source dev='/dev/HostVG/XenGuest2'/>
+ <target dev='hda' bus='ide'/>
+ <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+ </disk>
+ <disk type='network' device='disk'>
+ <driver name='qemu' type='raw'/>
+ <source protocol='rbd' name='pool/image'>
+ <host name='mon1.example.org' port='6321'/>
+ <host name='mon2.example.org' port='6322'/>
+ <host name='mon3.example.org' port='6322'/>
+ </source>
+ <target dev='hdb' bus='ide'/>
+ <address type='drive' controller='0' bus='0' target='0' unit='1'/>
+ </disk>
+ <interface type='bridge'>
+ <mac address='00:16:3e:66:92:9c'/>
+ <source bridge='xenbr1'/>
+ <script path='vif-bridge'/>
+ <model type='e1000'/>
+ </interface>
+ <input type='mouse' bus='ps2'/>
+ <input type='keyboard' bus='ps2'/>
+ <graphics type='vnc' port='-1' autoport='yes' listen='127.0.0.1'>
+ <listen type='address' address='127.0.0.1'/>
+ </graphics>
+ </devices>
+</domain>
diff --git a/tests/xlconfigtest.c b/tests/xlconfigtest.c
index 13b99f2..2668a76 100644
--- a/tests/xlconfigtest.c
+++ b/tests/xlconfigtest.c
@@ -217,6 +217,7 @@ mymain(void)
DO_TEST("paravirt-cmdline");
DO_TEST_FORMAT("paravirt-cmdline-extra-root");
DO_TEST_FORMAT("paravirt-cmdline-bogus-extra-root");
+ DO_TEST("rbd-multihost-noauth");
#ifdef LIBXL_HAVE_BUILDINFO_USBDEVICE_LIST
DO_TEST("fullvirt-multiusb");
--
2.1.4
--
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