[libvirt] [PATCHv3] Configure native vlan modes on Open vSwitch ports
Laine Stump
laine at laine.org
Fri May 10 18:10:38 UTC 2013
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)?
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