[libvirt] [PATCH REPOST 5/7] conf: Add support for virtio-scsi iothreads
Cole Robinson
crobinso at redhat.com
Tue May 3 13:50:23 UTC 2016
On 05/02/2016 06:30 PM, John Ferlan wrote:
> Add the ability to add an 'iothread' to the controller which will be how
> virtio-scsi-pci and virtio-scsi-ccw iothreads have been implemented in qemu.
>
> Describe the new functionality and add tests to parse/validate that the
> new attribute can be added.
>
> Signed-off-by: John Ferlan <jferlan at redhat.com>
> ---
> docs/formatdomain.html.in | 33 +++++++++++---
> docs/schemas/domaincommon.rng | 3 ++
> src/conf/domain_conf.c | 25 ++++++++++-
> src/conf/domain_conf.h | 1 +
> .../qemuxml2argv-iothreads-virtio-scsi-ccw.xml | 39 +++++++++++++++++
> .../qemuxml2argv-iothreads-virtio-scsi-pci.xml | 47 ++++++++++++++++++++
> .../qemuxml2xmlout-iothreads-virtio-scsi-ccw.xml | 40 +++++++++++++++++
> .../qemuxml2xmlout-iothreads-virtio-scsi-pci.xml | 51 ++++++++++++++++++++++
> tests/qemuxml2xmltest.c | 7 +++
> 9 files changed, 240 insertions(+), 6 deletions(-)
> create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-iothreads-virtio-scsi-ccw.xml
> create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-iothreads-virtio-scsi-pci.xml
> create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-iothreads-virtio-scsi-ccw.xml
> create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-iothreads-virtio-scsi-pci.xml
>
> diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
> index 5781dba..5e27fca 100644
> --- a/docs/formatdomain.html.in
> +++ b/docs/formatdomain.html.in
> @@ -565,11 +565,13 @@
> <dt><code>iothreads</code></dt>
> <dd>
> The content of this optional element defines the number
> - of IOThreads to be assigned to the domain for use by
> - virtio-blk-pci and virtio-blk-ccw target storage devices. There
> - should be only 1 or 2 IOThreads per host CPU. There may be more
> - than one supported device assigned to each IOThread.
> - <span class="since">Since 1.2.8</span>
> + of IOThreads to be assigned to the domain for use by supported
> + storage disks or controllers. There should be only 1 or 2 IOThreads
> + per host CPU. There may be more than one supported device assigned
> + to each IOThread. Supported for virtio-blk-pci and virtio-blk-ccw
> + disk devices <span class="since">since 1.2.8 (QEMU 2.1)</span>.
> + Supported for virtio-scsi-pci and virtio-scsi-ccw controller
> + devices <span class="since">since 1.3.4 (QEMU 2.4)</span>.
> </dd>
> <dt><code>iothreadids</code></dt>
> <dd>
This is the bit that should be made generic IMO
> @@ -3004,6 +3006,10 @@
> <controller type='virtio-serial' index='1'>
> <address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>
> </controller>
> + <controller type='scsi' index='0' model='virtio-scsi'>
> + <driver iothread='4'>
> + <address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/>
> + </controller>
> ...
> </devices>
> ...</pre>
> @@ -3084,6 +3090,23 @@
> I/O asynchronous handling</a> or not. Accepted values are
> "on" and "off". <span class="since">Since 1.2.18</span>
> </dd>
> + <dt><code>iothread</code></dt>
> + <dd>
> + Supported for controller type <code>scsi</code> using model
> + <code>virtio-scsi</code> for <code>address</code> types
> + <code>pci</code> and <code>ccw</code>
> + <span class="since">since 1.3.4 (QEMU 2.4)</span>.
> +
> + The optional <code>iothread</code> attribute assigns the controller
> + to an IOThread as defined by the range for the domain
> + <a href="#elementsIOThreadsAllocation"><code>iothreads</code></a>
> + value. Each SCSI <code>disk</code> assigned to use the specified
> + <code>controller</code> will utilize the same IOThread. If a specific
> + IOThread is desired for a specific SCSI <code>disk</code>, then
> + multiple controllers must be defined each having a specific
> + <code>iothread</code> value. The <code>iothread</code> value
> + must be within the range 1 to the domain iothreads value.
> + </dd>
> </dl>
> <p>
> USB companion controllers have an optional
> diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
> index b82f8c8..ceced6b 100644
> --- a/docs/schemas/domaincommon.rng
> +++ b/docs/schemas/domaincommon.rng
> @@ -1893,6 +1893,9 @@
> <optional>
> <ref name="ioeventfd"/>
> </optional>
> + <optional>
> + <ref name="driverIOThread"/>
> + </optional>
> </element>
> </optional>
> </interleave>
> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
> index 6375b2b..f571466 100644
> --- a/src/conf/domain_conf.c
> +++ b/src/conf/domain_conf.c
> @@ -7853,6 +7853,7 @@ virDomainControllerDefParseXML(xmlNodePtr node,
> char *busNr = NULL;
> int numaNode = -1;
> char *ioeventfd = NULL;
> + char *iothread = NULL;
> xmlNodePtr saved = ctxt->node;
> int rc;
>
> @@ -7897,6 +7898,7 @@ virDomainControllerDefParseXML(xmlNodePtr node,
> cmd_per_lun = virXMLPropString(cur, "cmd_per_lun");
> max_sectors = virXMLPropString(cur, "max_sectors");
> ioeventfd = virXMLPropString(cur, "ioeventfd");
> + iothread = virXMLPropString(cur, "iothread");
> } else if (xmlStrEqual(cur->name, BAD_CAST "model")) {
> if (processedModel) {
> virReportError(VIR_ERR_XML_ERROR, "%s",
> @@ -7958,6 +7960,21 @@ virDomainControllerDefParseXML(xmlNodePtr node,
> goto error;
> }
>
> + if (iothread) {
> + if (def->model != VIR_DOMAIN_CONTROLLER_MODEL_SCSI_VIRTIO_SCSI) {
> + virReportError(VIR_ERR_XML_ERROR,
> + _("'iothread' attribute only supported for "
> + "controller model '%s'"),
> + virDomainControllerModelSCSITypeToString(VIR_DOMAIN_CONTROLLER_MODEL_SCSI_VIRTIO_SCSI));
> + goto error;
> + }
I think this particular check should be moved to one of the generic PostParse
validation functions, since it's not specific to parse time.
Looks fine otherwise
- Cole
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