[libvirt] [PATCHv3] Configure native vlan modes on Open vSwitch ports
Kyle Mestery (kmestery)
kmestery at cisco.com
Fri May 10 18:35:06 UTC 2013
On May 10, 2013, at 1:10 PM, Laine Stump <laine at laine.org> wrote:
> On 04/30/2013 02:12 PM, james robson wrote:
>> This patch adds functionality to allow libvirt to configure the
>> 'native-tagged' and 'native-untagged' modes on openvswitch networks.
>>
>> v2 changes:
>> Fix problems reported by Eric Blake
>>
>> v3 changes:
>> Re work patch to address review comments
>>
>> ---
>>
>>
>> diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
>> index 888c005..5278534 100644
>> --- a/docs/formatdomain.html.in
>> +++ b/docs/formatdomain.html.in
>> @@ -3290,6 +3290,13 @@ qemu-kvm -net nic,model=? /dev/null
>> <parameters
>> interfaceid='09b11c53-8b5c-4eeb-8f00-d84eaa0aaa4f'/>
>> </virtualport>
>> </interface>
>> + <interface type='bridge'>
>> + <b><vlan trunk='yes'></b>
>> + <b><tag id='42'/></b>
>> + <b><tag id='123' nativeMode='untagged'/></b>
>> + <b></vlan></b>
>> + ...
>> + </interface>
>> <devices>
>> ...</pre>
>>
>> @@ -3316,6 +3323,15 @@ qemu-kvm -net nic,model=? /dev/null
>> vlan element.
>> </p>
>>
>> + <p>
>> + For network connections using openvswitch it is possible to
>> + configure the 'native-tagged' and 'native-untagged' vlan modes
>> + <span class="since">(Since 1.0.6).</span> This uses the optional
>> + <code>nativeMode</code> attribute on the <code><tag></code>
>> + element: <code>nativeMode</code> may be set to 'tagged' or
>> + 'untagged'. The id atribute of the element sets the native vlan.
>> + </p>
>> +
>> <h5><a name="elementLink">Modifying virtual link state</a></h5>
>> <pre>
>> ...
>> diff --git a/docs/formatnetwork.html.in b/docs/formatnetwork.html.in
>> index 4dd0415..e065ca4 100644
>> --- a/docs/formatnetwork.html.in
>> +++ b/docs/formatnetwork.html.in
>> @@ -414,6 +414,7 @@
>> <span class="since">Since 0.9.4</span>
>> </p>
>>
>> +
>> <h5><a name="elementVlanTag">Setting VLAN tag (on supported network
>> types only)</a></h5>
>>
>> <pre>
>> @@ -429,6 +430,13 @@
>> <parameters
>> interfaceid='09b11c53-8b5c-4eeb-8f00-d84eaa0aaa4f'/>
>> </virtualport>
>> </interface>
>> + <interface type='bridge'>
>> + <b><vlan trunk='yes'></b>
>> + <b><tag id='42'/></b>
>> + <b><tag id='123' nativeMode='untagged'/></b>
>> + <b></vlan></b>
>> + ...
>> + </interface>
>> <devices>
>> ...</pre>
>>
>> @@ -452,6 +460,14 @@
>> be added to the vlan element.
>> </p>
>> <p>
>> + For network connections using openvswitch it is possible to
>> + configure the 'native-tagged' and 'native-untagged' vlan modes
>> + <span class="since">(Since 1.0.6).</span> This uses the optional
>> + <code>nativeMode</code> attribute on the <code><tag></code>
>> + element: <code>nativeMode</code> may be set to 'tagged' or
>> + 'untagged'. The id atribute of the element sets the native vlan.
>> + </p>
>> + <p>
>> <code><vlan></code> elements can also be specified in
>> a <code><portgroup></code> element, as well as directly in
>> a domain's <code><interface></code> element. In the case
>> diff --git a/docs/schemas/networkcommon.rng
>> b/docs/schemas/networkcommon.rng
>> index 51ff759..e60f1fc 100644
>> --- a/docs/schemas/networkcommon.rng
>> +++ b/docs/schemas/networkcommon.rng
>> @@ -204,6 +204,14 @@
>> <param name="maxInclusive">4095</param>
>> </data>
>> </attribute>
>> + <optional>
>> + <attribute name="nativeMode">
>> + <choice>
>> + <value>tagged</value>
>> + <value>untagged</value>
>> + </choice>
>> + </attribute>
>> + </optional>
>> <empty/>
>> </element>
>> </oneOrMore>
>> diff --git a/src/conf/netdev_vlan_conf.c b/src/conf/netdev_vlan_conf.c
>> index 13ba8c6..dd5b64e 100644
>> --- a/src/conf/netdev_vlan_conf.c
>> +++ b/src/conf/netdev_vlan_conf.c
>> @@ -17,6 +17,7 @@
>> *
>> * Authors:
>> * Laine Stump <laine at redhat.com>
>> + * James Robson <jrobson at websense.com>
>> */
>>
>> #include <config.h>
>> @@ -33,6 +34,7 @@ virNetDevVlanParse(xmlNodePtr node, xmlXPathContextPtr
>> ctxt, virNetDevVlanPtr de
>> int ret = -1;
>> xmlNodePtr save = ctxt->node;
>> const char *trunk = NULL;
>> + const char *nativeMode = NULL;
>> xmlNodePtr *tagNodes = NULL;
>> int nTags, ii;
>>
>> @@ -54,6 +56,8 @@ virNetDevVlanParse(xmlNodePtr node, xmlXPathContextPtr
>> ctxt, virNetDevVlanPtr de
>> goto error;
>> }
>>
>> + def->nativeMode = 0;
>> + def->nativeTag = 0;
>> for (ii = 0; ii < nTags; ii++) {
>> unsigned long id;
>>
>> @@ -68,6 +72,21 @@ virNetDevVlanParse(xmlNodePtr node,
>> xmlXPathContextPtr ctxt, virNetDevVlanPtr de
>> _("vlan tag id %lu too large (maximum
>> 4095)"), id);
>> goto error;
>> }
>> + if ((nativeMode = virXPathString("string(./@nativeMode)",
>> ctxt)) != NULL) {
>> + if (STRCASENEQ(nativeMode, "tagged") &&
>> STRCASENEQ(nativeMode, "untagged")) {
>> + virReportError(VIR_ERR_XML_ERROR,
>> + _("invalid \"nativeMode='%s'\" in <tag>
>> - "
>> + "native_mode must be 'tagged' or
>> 'untagged'"), nativeMode);
>> + goto error;
>> + }
>> + if (def->nativeMode != 0) {
>> + virReportError(VIR_ERR_XML_ERROR, "%s",
>> + _("duplicate native vlan setting"));
>> + goto error;
>> + }
>> + def->nativeMode = STRCASEEQ(nativeMode, "tagged") ? 1 : 2;
>
> We prefer for things like this to have an enum defined, and use the
> ${enum-type-name}Type(To|From)String to convert between the string and
> the numeric value. Then in the code that uses the value, we compare to
> the enum rather than a plain number. For example, you can search for
> virDomainHostdevSubsys in src/conf/domain_conf.[ch]. Basically you need:
>
> * in the .h file:
>
> typedef enum {
> VIR_WHATEVER_NAME_TYPE_DEFAULT = 0,
> VIR_WHATEVER_NAME_TYPE_ONE,
> VIR_WHATEVER_NAME_TYPE_ANOTHER,
>
> VIR_WHATEVER_NAME_TYPE_LAST
> } virWhateverNameType;
>
> VIR_ENUM_DECL(virWhateverName)
>
> * in the .c file:
>
> VIR_ENUM_IMPL(virWhateverName, VIR_WHATEVER_NAME_TYPE_LAST,
> "default", "one", "another")
>
> * at the place you parse:
>
> if ((def->whatever = virWhateverTypeFromString(type)) <= 0) {
> virReportError(.....);
> goto error/cleanup;
> }
>
> * at the place you format:
>
> if (def->whatever) {
> const char *whateverStr = virWhateverTypeToString(def->whatever);
>
> if (!whatever) {
> virReportError(VIR_ERR_INTERNAL_ERROR, "Bad whatever value"...);
> goto error/cleanup;
> }
> virAsprintf(buf, " whatever='%s', whateverStr);
>
> * in the code that implements it:
>
> switch (def->whatever) {
> case VIR_WHATEVER_NAME_TYPE_ONE:
> blah;
> break;
> case VIR_WHATEVER_NAME_TYPE_ANOTHER:
> bleh;
> break;
> case VIR_WHATEVER_NAME_TYPE_DEFAULT:
> default:
> break;
> }
>
> or something like that.
>
>
>> + def->nativeTag = id;
>> + }
>> def->tag[ii] = id;
>> }
>>
>> @@ -89,6 +108,12 @@ virNetDevVlanParse(xmlNodePtr node,
>> xmlXPathContextPtr ctxt, virNetDevVlanPtr de
>> "is required for more than one vlan
>> tag"), trunk);
>> goto error;
>> }
>> + if (def->nativeMode != 0) {
>> + virReportError(VIR_ERR_XML_ERROR, "%s",
>> + _("invalid configuration in <vlan> -
>> \"trunk='no'\" is "
>> + "not allowed with a native vlan id"));
>> + goto error;
>> + }
>> /* allow (but discard) "trunk='no' if there is a single tag
>> */
>> if (STRCASENEQ(trunk, "no")) {
>> virReportError(VIR_ERR_XML_ERROR,
>> @@ -125,7 +150,11 @@ virNetDevVlanFormat(virNetDevVlanPtr def,
>> virBufferPtr buf)
>>
>> virBufferAsprintf(buf, "<vlan%s>\n", def->trunk ? " trunk='yes'" :
>> "");
>> for (ii = 0; ii < def->nTags; ii++) {
>> - virBufferAsprintf(buf, " <tag id='%u'/>\n", def->tag[ii]);
>> + if (def->nativeTag == def->tag[ii]) {
>> + virBufferAsprintf(buf, " <tag id='%u' nativeMode='%
>> s'/>\n", def->tag[ii], def->nativeMode == 1 ? "tagged" : "untagged");
>> + } else {
>> + virBufferAsprintf(buf, " <tag id='%u'/>\n", def->tag[ii]);
>> + }
>> }
>> virBufferAddLit(buf, "</vlan>\n");
>> return 0;
>> diff --git a/src/util/virnetdevopenvswitch.c
>> b/src/util/virnetdevopenvswitch.c
>> index 4fe077a..69cc1ac 100644
>> --- a/src/util/virnetdevopenvswitch.c
>> +++ b/src/util/virnetdevopenvswitch.c
>> @@ -19,6 +19,7 @@
>> * Dan Wendlandt <dan at nicira.com>
>> * Kyle Mestery <kmestery at cisco.com>
>> * Ansis Atteka <aatteka at nicira.com>
>> + * James Robson <jrobson at websense.com>
>
> The author list in our files usually only contains the original authors
> of the file and those who have contributed a "substantial" portion after
> creation.
>
>> */
>>
>> #include <config.h>
>> @@ -108,8 +109,13 @@ int virNetDevOpenvswitchAddPort(const char *brname,
>> const char *ifname,
>> virCommandAddArgList(cmd, "--timeout=5", "--", "--may-exist",
>> "add-port",
>> brname, ifname, NULL);
>>
>> - if (virBufferUse(&buf) != 0)
>> + if (virBufferUse(&buf) != 0) {
>> + if (virtVlan->nativeMode > 0) {
>> + virCommandAddArgFormat(cmd, "vlan_mode=%s",
>> virtVlan->nativeMode == 1 ? "native-tagged" : "native-untagged");
>> + virCommandAddArgFormat(cmd, "tag=%d", virtVlan->nativeTag);
>> + }
>> virCommandAddArgList(cmd, virBufferCurrentContent(&buf), NULL);
>> + }
>>
>> if (ovsport->profileID[0] == '\0') {
>> virCommandAddArgList(cmd,
>> diff --git a/src/util/virnetdevvlan.c b/src/util/virnetdevvlan.c
>> index 2fe2017..b81c037 100644
>> --- a/src/util/virnetdevvlan.c
>> +++ b/src/util/virnetdevvlan.c
>> @@ -17,6 +17,7 @@
>> *
>> * Authors:
>> * Laine Stump <laine at redhat.com>
>> + * James Robson <jrobson at websense.com>
>> */
>>
>> #include <config.h>
>> @@ -33,6 +34,8 @@ virNetDevVlanClear(virNetDevVlanPtr vlan)
>> {
>> VIR_FREE(vlan->tag);
>> vlan->nTags = 0;
>> + vlan->nativeMode = 0;
>> + vlan->nativeTag = 0;
>> }
>>
>> void
>> @@ -54,7 +57,9 @@ virNetDevVlanEqual(const virNetDevVlanPtr a, const
>> virNetDevVlanPtr b)
>> return false;
>>
>> if (a->trunk != b->trunk ||
>> - a->nTags != b->nTags) {
>> + a->nTags != b->nTags ||
>> + a->nativeMode != b->nativeMode ||
>> + a->nativeTag != b->nativeTag) {
>> return false;
>> }
>>
>> @@ -89,6 +94,8 @@ virNetDevVlanCopy(virNetDevVlanPtr dst, const
>> virNetDevVlanPtr src)
>>
>> dst->trunk = src->trunk;
>> dst->nTags = src->nTags;
>> + dst->nativeMode = src->nativeMode;
>> + dst->nativeTag = src->nativeTag;
>> memcpy(dst->tag, src->tag, src->nTags * sizeof(*src->tag));
>> return 0;
>> }
>> diff --git a/src/util/virnetdevvlan.h b/src/util/virnetdevvlan.h
>> index c6b16ef..93426cc 100644
>> --- a/src/util/virnetdevvlan.h
>> +++ b/src/util/virnetdevvlan.h
>> @@ -17,6 +17,7 @@
>> *
>> * Authors:
>> * Laine Stump <laine at redhat.com>
>> + * James Robson <jrobson at websense.com>
>> */
>>
>> #ifndef __VIR_NETDEV_VLAN_H__
>> @@ -28,6 +29,8 @@ struct _virNetDevVlan {
>> bool trunk; /* true if this is a trunk */
>> int nTags; /* number of tags in array */
>> unsigned int *tag; /* pointer to array of tags */
>> + short int nativeMode; /* 0=off, 1=tagged, 2=untagged */
>> + unsigned int nativeTag;
>> };
>>
>> void virNetDevVlanClear(virNetDevVlanPtr vlan);
>> diff --git a/tests/networkxml2xmlin/openvswitch-net.xml
>> b/tests/networkxml2xmlin/openvswitch-net.xml
>> index a3d82b1..2f6084d 100644
>> --- a/tests/networkxml2xmlin/openvswitch-net.xml
>> +++ b/tests/networkxml2xmlin/openvswitch-net.xml
>> @@ -21,4 +21,13 @@
>> <parameters profileid='alice-profile'/>
>> </virtualport>
>> </portgroup>
>> + <portgroup name='native'>
>> + <vlan trunk='yes'>
>> + <tag id='123' nativeMode='tagged'/>
>> + <tag id='444'/>
>> + </vlan>
>> + <virtualport>
>> + <parameters profileid='native-profile'/>
>> + </virtualport>
>> + </portgroup>
>> </network>
>> diff --git a/tests/networkxml2xmlout/openvswitch-net.xml
>> b/tests/networkxml2xmlout/openvswitch-net.xml
>> index a3d82b1..2f6084d 100644
>> --- a/tests/networkxml2xmlout/openvswitch-net.xml
>> +++ b/tests/networkxml2xmlout/openvswitch-net.xml
>> @@ -21,4 +21,13 @@
>> <parameters profileid='alice-profile'/>
>> </virtualport>
>> </portgroup>
>> + <portgroup name='native'>
>> + <vlan trunk='yes'>
>> + <tag id='123' nativeMode='tagged'/>
>> + <tag id='444'/>
>> + </vlan>
>> + <virtualport>
>> + <parameters profileid='native-profile'/>
>> + </virtualport>
>> + </portgroup>
>> </network>
>>
>>
>>
>
>
> Those are the only issues I see with this patch now.
>
> Kyle - what is your opinion of implementing the config this way. Does it
> seem workable? Or was my ignorance of the subject matter showing when I
> suggested putting "nativeMode='tagged'" as an attribute of a tag (rather
> than putting "nativeTag" and "nativeMode" attributes directly in <vlan>,
> as James did in the first version of the patch)?
I think the approach you have here looks workable, as James indicated,
the approach you had him take with the subsequent versions of these
patches look more workable. I like having the nativeMode as an
attribute of the tag.
Also, the patch looks good to me!
Acked-by: Kyle Mestery <kmestery at cisco.com>
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