[libvirt] [PATCH 21/25] conf: Introduce sgio for hostdev
John Ferlan
jferlan at redhat.com
Tue May 7 19:17:51 UTC 2013
On 05/03/2013 02:07 PM, Osier Yang wrote:
> "sgio" is only valid for scsi host device.
> ---
> docs/formatdomain.html.in | 7 ++++-
> docs/schemas/domaincommon.rng | 8 +++++
> src/conf/domain_conf.c | 34 ++++++++++++++++++---
> src/conf/domain_conf.h | 1 +
> .../qemuxml2argv-hostdev-scsi-sgio.xml | 35 ++++++++++++++++++++++
> tests/qemuxml2xmltest.c | 1 +
> 6 files changed, 81 insertions(+), 5 deletions(-)
> create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-hostdev-scsi-sgio.xml
>
> diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
> index 6437d6d..89d11e7 100644
> --- a/docs/formatdomain.html.in
> +++ b/docs/formatdomain.html.in
> @@ -2319,7 +2319,12 @@
> and <code>virNodeDeviceReAttach</code> (or <code>virsh
> nodedev-reattach</code>) after hot-unplug or stopping the
> guest. For SCSI device, user is responsible to make sure the device
> - is not used by host.</dd>
> + is not used by host.
> + The optional <code>sgio</code> (<span class="since">since 1.0.6</span>)
> + attribute indicates whether the kernel will filter unprivileged
> + SG_IO commands for the disk, valid settings are "filtered" or
> + "unfiltered". Defaults to "filtered".
> + </dd>
> <dt><code>source</code></dt>
> <dd>The source element describes the device as seen from the host.
> The USB device can either be addressed by vendor / product id using the
> diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
> index ca79e67..0a59c7a 100644
> --- a/docs/schemas/domaincommon.rng
> +++ b/docs/schemas/domaincommon.rng
> @@ -3179,6 +3179,14 @@
> <attribute name="type">
> <value>scsi</value>
> </attribute>
> + <optional>
> + <attribute name="sgio">
> + <choice>
> + <value>filtered</value>
> + <value>unfiltered</value>
> + </choice>
> + </attribute>
> + </optional>
> <element name="source">
> <interleave>
> <ref name="sourceinfoadapter"/>
> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
> index 9823b9c..d604e5b 100644
> --- a/src/conf/domain_conf.c
> +++ b/src/conf/domain_conf.c
> @@ -3784,6 +3784,7 @@ virDomainHostdevDefParseXMLSubsys(xmlNodePtr node,
> {
> xmlNodePtr sourcenode;
> char *managed = NULL;
> + char *sgio = NULL;
> char *backendStr = NULL;
> int backend;
> int ret = -1;
> @@ -3798,6 +3799,8 @@ virDomainHostdevDefParseXMLSubsys(xmlNodePtr node,
> def->managed = true;
> }
>
> + sgio = virXMLPropString(node, "sgio");
> +
> /* @type is passed in from the caller rather than read from the
> * xml document, because it is specified in different places for
> * different kinds of defs - it is an attribute of
> @@ -3834,6 +3837,22 @@ virDomainHostdevDefParseXMLSubsys(xmlNodePtr node,
> goto error;
> }
>
> + if (sgio) {
> + if (def->source.subsys.type !=
> + VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI) {
> + virReportError(VIR_ERR_XML_ERROR, "%s",
> + _("sgio is only supported for scsi host device"));
> + goto error;
> + }
> +
> + if ((def->source.subsys.u.scsi.sgio =
> + virDomainDeviceSGIOTypeFromString(sgio)) <= 0) {
> + virReportError(VIR_ERR_XML_ERROR,
> + _("unknown sgio mode '%s'"), sgio);
> + goto error;
> + }
> + }
> +
> switch (def->source.subsys.type) {
> case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI:
> if (virDomainHostdevSubsysPciDefParseXML(sourcenode, def, flags) < 0)
> @@ -3872,6 +3891,7 @@ virDomainHostdevDefParseXMLSubsys(xmlNodePtr node,
> ret = 0;
> error:
> VIR_FREE(managed);
> + VIR_FREE(sgio);
> VIR_FREE(backendStr);
> return ret;
> }
> @@ -15464,11 +15484,17 @@ virDomainHostdevDefFormat(virBufferPtr buf,
>
> virBufferAsprintf(buf, " <hostdev mode='%s' type='%s'",
> mode, type);
> - if (def->mode == VIR_DOMAIN_HOSTDEV_MODE_SUBSYS)
> - virBufferAsprintf(buf, " managed='%s'>\n",
> + if (def->mode == VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) {
> + virBufferAsprintf(buf, " managed='%s'",
> def->managed ? "yes" : "no");
> - else
> - virBufferAddLit(buf, ">\n");
> +
> + if (def->source.subsys.type ==
> + VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI &&
> + def->source.subsys.u.scsi.sgio)
> + virBufferAsprintf(buf, " sgio='%s'",
> + virDomainDeviceSGIOTypeToString(def->source.subsys.u.scsi.sgio));
> + }
> + virBufferAddLit(buf, ">\n");
>
> virBufferAdjustIndent(buf, 6);
> switch (def->mode) {
> diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
> index 59cf6a7..8d67e67 100644
> --- a/src/conf/domain_conf.h
> +++ b/src/conf/domain_conf.h
> @@ -423,6 +423,7 @@ struct _virDomainHostdevSubsys {
> unsigned bus;
> unsigned target;
> unsigned unit;
> + int sgio; /* enum virDomainDeviceSGIO */
> } scsi;
> } u;
> };
> diff --git a/tests/qemuxml2argvdata/qemuxml2argv-hostdev-scsi-sgio.xml b/tests/qemuxml2argvdata/qemuxml2argv-hostdev-scsi-sgio.xml
> new file mode 100644
> index 0000000..21404ee
> --- /dev/null
> +++ b/tests/qemuxml2argvdata/qemuxml2argv-hostdev-scsi-sgio.xml
> @@ -0,0 +1,35 @@
> +<domain type='qemu'>
> + <name>QEMUGuest2</name>
> + <uuid>c7a5fdbd-edaf-9466-926a-d65c16db1809</uuid>
> + <memory unit='KiB'>219100</memory>
> + <currentMemory unit='KiB'>219100</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</emulator>
> + <disk type='block' device='disk'>
> + <source dev='/dev/HostVG/QEMUGuest2'/>
> + <target dev='hda' bus='ide'/>
> + <address type='drive' controller='0' bus='0' target='0' unit='0'/>
> + </disk>
> + <controller type='scsi' index='0' model='virtio-scsi'/>
> + <controller type='usb' index='0'/>
> + <controller type='ide' index='0'/>
> + <controller type='pci' index='0' model='pci-root'/>
> + <hostdev mode='subsystem' type='scsi' managed='yes' sgio='unfiltered'>
> + <source>
> + <adapter name='scsi_host0'/>
> + <address bus='0' target='0' unit='0'/>
> + </source>
> + <address type='drive' controller='0' bus='0' target='4' unit='8'/>
> + </hostdev>
> + <memballoon model='virtio'/>
> + </devices>
> +</domain>
> diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
> index d37a657..04be8dd 100644
> --- a/tests/qemuxml2xmltest.c
> +++ b/tests/qemuxml2xmltest.c
> @@ -289,6 +289,7 @@ mymain(void)
> DO_TEST("hostdev-scsi-virtio-scsi");
> DO_TEST("hostdev-scsi-readonly");
> DO_TEST("hostdev-scsi-shareable");
> + DO_TEST("hostdev-scsi-sgio");
NIT: should this be "scsi-unfiltered-sgio" since the default is filtered
and you're testing the unfiltered mode... Probably changes the xml file
name too.
It's not a deal breaker... ACK otherwise.
John
>
> virObjectUnref(driver.caps);
> virObjectUnref(driver.xmlopt);
>
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