[libvirt] [PATCH] Fix python error reporting for some storage operations
by Cole Robinson
In the python bindings, all vir* classes expect to be
passed a virConnect object when instantiated. Before
the storage stuff, these classes were only instantiated
in virConnect methods, so the generator is hardcoded to
pass 'self' as the connection instance to these classes.
Problem is there are some methods that return pool or vol
instances which aren't called from virConnect: you can
lookup a storage volume's associated pool, and can lookup
volumes from a pool. In these cases passing 'self' doesn't
give the vir* instance a connection, so when it comes time
to raise an exception crap hits the fan.
Rather than rework the generator to accomodate this edge
case, I just fixed the init functions for virStorage* to
pull the associated connection out of the passed value
if it's not a virConnect instance.
Thanks,
Cole
diff --git a/python/generator.py b/python/generator.py
index 01a17da..c706b19 100755
--- a/python/generator.py
+++ b/python/generator.py
@@ -962,8 +962,12 @@ def buildWrappers():
list = reference_keepers[classname]
for ref in list:
classes.write(" self.%s = None\n" % ref[1])
- if classname in [ "virDomain", "virNetwork", "virStoragePool", "virStorageVol" ]:
+ if classname in [ "virDomain", "virNetwork" ]:
classes.write(" self._conn = conn\n")
+ elif classname in [ "virStorageVol", "virStoragePool" ]:
+ classes.write(" self._conn = conn\n" + \
+ " if not isinstance(conn, virConnect):\n" + \
+ " self._conn = conn._conn\n")
classes.write(" if _obj != None:self._o = _obj;return\n")
classes.write(" self._o = None\n\n");
destruct=None
3 weeks, 4 days
[libvirt] Supporting vhost-net and macvtap in libvirt for QEMU
by Anthony Liguori
Disclaimer: I am neither an SR-IOV nor a vhost-net expert, but I've CC'd
people that are who can throw tomatoes at me for getting bits wrong :-)
I wanted to start a discussion about supporting vhost-net in libvirt.
vhost-net has not yet been merged into qemu but I expect it will be soon
so it's a good time to start this discussion.
There are two modes worth supporting for vhost-net in libvirt. The
first mode is where vhost-net backs to a tun/tap device. This is
behaves in very much the same way that -net tap behaves in qemu today.
Basically, the difference is that the virtio backend is in the kernel
instead of in qemu so there should be some performance improvement.
Current, libvirt invokes qemu with -net tap,fd=X where X is an already
open fd to a tun/tap device. I suspect that after we merge vhost-net,
libvirt could support vhost-net in this mode by just doing -net
vhost,fd=X. I think the only real question for libvirt is whether to
provide a user visible switch to use vhost or to just always use vhost
when it's available and it makes sense. Personally, I think the later
makes sense.
The more interesting invocation of vhost-net though is one where the
vhost-net device backs directly to a physical network card. In this
mode, vhost should get considerably better performance than the current
implementation. I don't know the syntax yet, but I think it's
reasonable to assume that it will look something like -net
tap,dev=eth0. The effect will be that eth0 is dedicated to the guest.
On most modern systems, there is a small number of network devices so
this model is not all that useful except when dealing with SR-IOV
adapters. In that case, each physical device can be exposed as many
virtual devices (VFs). There are a few restrictions here though. The
biggest is that currently, you can only change the number of VFs by
reloading a kernel module so it's really a parameter that must be set at
startup time.
I think there are a few ways libvirt could support vhost-net in this
second mode. The simplest would be to introduce a new tag similar to
<source network='br0'>. In fact, if you probed the device type for the
network parameter, you could probably do something like <source
network='eth0'> and have it Just Work.
Another model would be to have libvirt see an SR-IOV adapter as a
network pool whereas it handled all of the VF management. Considering
how inflexible SR-IOV is today, I'm not sure whether this is the best model.
Has anyone put any more thought into this problem or how this should be
modeled in libvirt? Michael, could you share your current thinking for
-net syntax?
--
Regards,
Anthony Liguori
1 year, 5 months
[libvirt] JNA Error Callback could cause core dump.
by Benjamin Wang (gendwang)
Hi,
When I changed code as following:
public class Connect {
// Load the native part
static {
Libvirt.INSTANCE.virInitialize();
try {
ErrorHandler.processError(Libvirt.INSTANCE);
} catch (Exception e) {
e.printStackTrace();
}
+ Libvirt.INSTANCE.virSetErrorFunc(null, new ErrorCallback());
}
The server will generate the following core dump:
Program terminated with signal 6, Aborted.
#0 0x0000003f9b030265 in raise () from /lib64/libc.so.6
(gdb) where
#0 0x0000003f9b030265 in raise () from /lib64/libc.so.6
#1 0x0000003f9b031d10 in abort () from /lib64/libc.so.6
#2 0x0000003f9b06a84b in __libc_message () from /lib64/libc.so.6
#3 0x0000003f9b07230f in _int_free () from /lib64/libc.so.6
#4 0x0000003f9b07276b in free () from /lib64/libc.so.6
#5 0x00002aaaacf46868 in ?? ()
#6 0x0000000000000000 in ?? ()
The problem was caused that when JNA call setErrorFunc, it will create ErrorCallback object. But when GC is executed, the object is GCed. But even I change code as following.
When GC is excuted, the callback object will be moved. Then C can't find this object. Both of scenarios will cause core dump. It seems that JNA mustn't provide ErrorCallback Class,
Because nobody can use this.
Please correct me.
public class Connect {
+ private static final ErrorCallback callback = new ErrorCallback();
// Load the native part
static {
Libvirt.INSTANCE.virInitialize();
try {
ErrorHandler.processError(Libvirt.INSTANCE);
} catch (Exception e) {
e.printStackTrace();
}
+ Libvirt.INSTANCE.virSetErrorFunc(null, callback);
}
B.R.
Benjamin Wang
11 years, 3 months
[libvirt] [PATCH 0/2] qemu: Rework CD/DVD changing
by Michal Privoznik
The first patch is bare bug fix (without any bug reported though).
The second is again a bug fix, but not so easy to spot. Basically, when we
change a media, we should issue 'eject' first, then wait until the tray gets
open, after which we can finally issue 'change' command. Even for bare 'eject'
we ought to check status, shouldn't we?
Michal Privoznik (2):
qemu_monitor: Fix tray-open attribute in query-block
qemu_hotplug: Rework media changing process
src/qemu/qemu_hotplug.c | 51 +++++++++++++++++++++++++++++++++++++++++---
src/qemu/qemu_monitor_json.c | 2 +-
src/qemu/qemu_monitor_text.c | 6 +++---
3 files changed, 52 insertions(+), 7 deletions(-)
--
1.8.0.2
11 years, 10 months
[libvirt] New application
by Maciej Nabożny
Hello,
I'm developer of CC1 project in Institute of Nuclear Physics in
Cracow. We are creating cloud computing system based on Libvirt. Is it
possible to add link to our project at yours website in applications
section?
Title: CC1 Project (http://cc1.ifj.edu.pl)
Description: The Cloud Computing for Science and Economy project
At this time we are using version 0.8.3, but as soon as debian 7 will
we stable, we are going to migrate to newer version of Libvirt.
Regards,
Maciej Nabożny
11 years, 10 months
[libvirt] [PATCH] ESX: Fix DISPATCH_FREE generation code to free all extended objects
by Ata E Husain Bohra
Python code generator "generate_source" section that handles
code generation to "free" inherited objects needs to generate
DISPATCH_FREE calls for all extended_by objects.
---
src/esx/esx_vi_generator.py | 21 ++++++++++++++++++---
1 file changed, 18 insertions(+), 3 deletions(-)
diff --git a/src/esx/esx_vi_generator.py b/src/esx/esx_vi_generator.py
index af4e7e8..7a7cf76 100755
--- a/src/esx/esx_vi_generator.py
+++ b/src/esx/esx_vi_generator.py
@@ -4,6 +4,7 @@
# esx_vi_generator.py: generates most of the SOAP type mapping code
#
# Copyright (C) 2010-2012 Matthias Bolte <matthias.bolte(a)googlemail.com>
+# Copyright (C) 2013 Ata E Husain Bohra <ata.husain(a)hotmail.com>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
@@ -785,9 +786,7 @@ class Object(Type):
source += "ESX_VI__TEMPLATE__DYNAMIC_FREE(%s,\n" % self.name
source += "{\n"
- for extended_by in self.extended_by:
- source += " ESX_VI__TEMPLATE__DISPATCH__FREE(%s)\n" \
- % extended_by
+ source += recurse_dispatch(self, "ESX_VI__TEMPLATE__DISPATCH__FREE")
source += "},\n"
source += "{\n"
@@ -1285,6 +1284,22 @@ class ManagedObject(Type):
+def recurse_dispatch(object, text):
+
+ source = ""
+
+ if object.extended_by is None:
+ return source
+
+ for extended_by in object.extended_by:
+ source += " %s(%s)\n" % (text, extended_by)
+ child = objects_by_name[extended_by]
+ source += recurse_dispatch(child, text)
+
+ return source
+
+
+
class Enum(Type):
FEATURE__ANY_TYPE = (1 << 1)
FEATURE__SERIALIZE = (1 << 2)
--
1.7.9.5
11 years, 11 months
[libvirt] [RFC] New API to retrieve node CPU map
by Viktor Mihajlovski
Hi,
in order to use the APIs listed below it is necessary for a client to
know the maximum number of node CPUs which is passed via the maplen
argument.
virDomainGetEmulatorPinInfo
virDomainGetVcpuPinInfo
virDomainGetVcpus
virDomainPinEmulator
virDomainPinVcpu
virDomainPinVcpuFlags
The current approach uses virNodeGetInfo to determine the maximum CPU
number. This can lead to incorrect results if not all node CPUs are
online. The maximum CPU number should always be the number of CPUs
present on the host, regardless of their online/offline state.
The following example illustrates the issue:
Host has 3 logical CPUs, 1 socket, 3 cores, 1 thread.
Guest has 1 virtual CPU and is started while all 3 host CPUs are
online.
$ virsh vcpuinfo guest
VCPU: 0
CPU: 0
State: running
CPU time: 35.4s
CPU Affinity: yyy
$ echo 0 > /sys/devices/system/cpu/cpu1/online
$ virsh vcpuinfo guest
VCPU: 0
CPU: 0
State: running
CPU time: 35.5s
CPU Affinity: y-
The correct display for CPU affinity would have been y-y, as the guest
continues to use CPUs 0 and 2.
This is not a display problem only, because it is also not possible to
explicitly pin the virtual CPU to host CPUs 0 and 2, due to the
truncated CPU mask.
PROPOSAL:
To help solve the issue above I suggest two new public API functions:
int
virNodeGetCpuNum(virConnectPtr conn);
returning the number of present CPUs on the host or -1 upon failure
and
int
virNodeGetCpuMap(virConnectPtr conn, unsigned char * cpumap, int maplen);
returning the number of present CPUs or -1 on failure and storing a bit
map of real CPUs as described in virDomainPinVcpu in cpumap. The bits in
the bit map are set to 1 for online CPUs and set to 0 for offline CPUs.
Implementation is facilitated by the function nodeGetCPUmap in nodeinfo.c.
Clients can use virNodeGetCpuNum to properly determine the maximum
number of node CPUs and the online/offline information.
Thanks for your comments.
--
Mit freundlichen Grüßen/Kind Regards
Viktor Mihajlovski
IBM Deutschland Research & Development GmbH
Vorsitzender des Aufsichtsrats: Martin Jetter
Geschäftsführung: Dirk Wittkopp
Sitz der Gesellschaft: Böblingen
Registergericht: Amtsgericht Stuttgart, HRB 243294
11 years, 11 months
[libvirt] [PATCHv2] Configure native vlan modes on Open vSwitch ports
by james robson
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
---
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index ffcc33e..a5054cc 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -3209,6 +3209,12 @@ qemu-kvm -net nic,model=? /dev/null
<parameters
interfaceid='09b11c53-8b5c-4eeb-8f00-d84eaa0aaa4f'/>
</virtualport>
</interface>
+ <interface type='bridge'>
+ <b><vlan trunk='yes' native_mode='tagged'
native_tag='123'></b>
+ <b><tag id='42'/></b>
+ <b></vlan></b>
+ ...
+ </interface>
<devices>
...</pre>
@@ -3234,7 +3240,17 @@ qemu-kvm -net nic,model=? /dev/null
attribute <code>trunk='yes'</code> can be added to the toplevel
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 1.0.3).</span> This uses the optional
+ <code>native_mode</code> and <code>native_tag</code> attributes
+ on the <code><vlan></code> element:
<code>native_mode</code>
+ may be set to 'tagged' or 'untagged', <code>native_tag</code>
+ sets the id of the native vlan. Setting a native vlan implies
+ this is a trunk port, so <code>trunk='yes'</code> will be added
if not
+ explicitly set.
+ </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 7b42529..68c562b 100644
--- a/docs/formatnetwork.html.in
+++ b/docs/formatnetwork.html.in
@@ -396,6 +396,12 @@
<parameters
interfaceid='09b11c53-8b5c-4eeb-8f00-d84eaa0aaa4f'/>
</virtualport>
</interface>
+ <interface type='bridge'>
+ <b><vlan trunk='yes' native_mode='tagged'
native_tag='123'></b>
+ <b><tag id='42'/></b>
+ <b></vlan></b>
+ ...
+ </interface>
<devices>
...</pre>
diff --git a/docs/schemas/networkcommon.rng
b/docs/schemas/networkcommon.rng
index 51ff759..4696f43 100644
--- a/docs/schemas/networkcommon.rng
+++ b/docs/schemas/networkcommon.rng
@@ -197,6 +197,21 @@
<value>yes</value>
</attribute>
</optional>
+ <optional>
+ <attribute name="native_mode">
+ <choice>
+ <value>tagged</value>
+ <value>untagged</value>
+ </choice>
+ </attribute>
+ </optional>
+ <optional>
+ <attribute name="native_tag">
+ <data type="unsignedInt">
+ <param name="maxInclusive">4095</param>
+ </data>
+ </attribute>
+ </optional>
<oneOrMore>
<element name="tag">
<attribute name="id">
diff --git a/src/conf/netdev_vlan_conf.c b/src/conf/netdev_vlan_conf.c
index 13ba8c6..618eb4c 100644
--- a/src/conf/netdev_vlan_conf.c
+++ b/src/conf/netdev_vlan_conf.c
@@ -17,6 +17,7 @@
*
* Authors:
* Laine Stump <laine(a)redhat.com>
+ * James Robson <jrobson(a)websense.com>
*/
#include <config.h>
@@ -33,6 +34,8 @@ virNetDevVlanParse(xmlNodePtr node, xmlXPathContextPtr
ctxt, virNetDevVlanPtr de
int ret = -1;
xmlNodePtr save = ctxt->node;
const char *trunk = NULL;
+ const char *nativeMode;
+ unsigned int nativeTag;
xmlNodePtr *tagNodes = NULL;
int nTags, ii;
@@ -73,16 +76,44 @@ virNetDevVlanParse(xmlNodePtr node,
xmlXPathContextPtr ctxt, virNetDevVlanPtr de
def->nTags = nTags;
- /* now that we know how many tags there are, look for an explicit
- * trunk setting.
- */
- if (nTags > 1)
- def->trunk = true;
+ def->nativeMode = 0;
+ def->nativeTag = 0;
ctxt->node = node;
+ if ((nativeMode = virXPathString("string(./@native_mode)", ctxt)) !
= NULL) {
+ if (STRCASENEQ(nativeMode, "tagged") && STRCASENEQ(nativeMode,
"untagged")) {
+ virReportError(VIR_ERR_XML_ERROR,
+ _("invalid \"native_mode='%s'\" in <vlan> -
"
+ "native_mode must be 'tagged' or
'untagged'"), nativeMode);
+ goto error;
+ }
+ if (virXPathUInt("string(./@native_tag)", ctxt, &nativeTag) <
0) {
+ virReportError(VIR_ERR_XML_ERROR, "%s",
+ _("missing or invalid native_tag
attribute"));
+ goto error;
+ }
+ if (nativeTag > 4095) {
+ virReportError(VIR_ERR_XML_ERROR,
+ _("native_tag %u too large (maximum 4095)"),
nativeTag);
+ goto error;
+ }
+ def->nativeMode = STRCASEEQ(nativeMode, "tagged") ? 1 : 2;
+ def->nativeTag = nativeTag;
+ }
+
+ /* def->trunk will be set to true if:
+ * "trunk='yes'" is set in xml
+ * a native-* vlan mode has been set
+ * >1 tag has been set */
if ((trunk = virXPathString("string(./@trunk)", ctxt)) != NULL) {
def->trunk = STRCASEEQ(trunk, "yes");
if (!def->trunk) {
+ if (def->nativeMode > 0) {
+ virReportError(VIR_ERR_XML_ERROR, "%s",
+ _("invalid configuration in <vlan> -
\"trunk='no'\" is "
+ "not allowed with native_mode"));
+ goto error;
+ }
if (nTags > 1) {
virReportError(VIR_ERR_XML_ERROR,
_("invalid \"trunk='%s'\" in <vlan> -
trunk='yes' "
@@ -97,6 +128,8 @@ virNetDevVlanParse(xmlNodePtr node,
xmlXPathContextPtr ctxt, virNetDevVlanPtr de
goto error;
}
}
+ } else if (nTags > 1 || def->nativeMode > 0) {
+ def->trunk = true;
}
ret = 0;
@@ -122,8 +155,11 @@ virNetDevVlanFormat(virNetDevVlanPtr def,
virBufferPtr buf)
_("missing vlan tag data"));
return -1;
}
-
- virBufferAsprintf(buf, "<vlan%s>\n", def->trunk ? " trunk='yes'" :
"");
+ if (def->nativeMode == 0) {
+ virBufferAsprintf(buf, "<vlan%s>\n", def->trunk ? "
trunk='yes'" : "");
+ } else {
+ virBufferAsprintf(buf, "<vlan trunk='yes' native_mode='%s'
native_tag='%u'>\n", def->nativeMode == 1 ? "tagged" : "untagged",
def->nativeTag);
+ }
for (ii = 0; ii < def->nTags; ii++) {
virBufferAsprintf(buf, " <tag id='%u'/>\n", def->tag[ii]);
}
diff --git a/src/util/virnetdevopenvswitch.c
b/src/util/virnetdevopenvswitch.c
index 4fe077a..87122b0 100644
--- a/src/util/virnetdevopenvswitch.c
+++ b/src/util/virnetdevopenvswitch.c
@@ -19,6 +19,7 @@
* Dan Wendlandt <dan(a)nicira.com>
* Kyle Mestery <kmestery(a)cisco.com>
* Ansis Atteka <aatteka(a)nicira.com>
+ * James Robson <jrobson(a)websense.com>
*/
#include <config.h>
@@ -108,9 +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,
"--", "set", "Interface", ifname,
attachedmac_ex_id,
diff --git a/src/util/virnetdevvlan.c b/src/util/virnetdevvlan.c
index 2fe2017..298673d 100644
--- a/src/util/virnetdevvlan.c
+++ b/src/util/virnetdevvlan.c
@@ -17,6 +17,7 @@
*
* Authors:
* Laine Stump <laine(a)redhat.com>
+ * James Robson <jrobson(a)websense.com>
*/
#include <config.h>
@@ -33,6 +34,8 @@ virNetDevVlanClear(virNetDevVlanPtr vlan)
{
VIR_FREE(vlan->tag);
vlan->nTags = 0;
+ vlan->nativeMode = 0;
+ vlan->nativeTag = -1;
}
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..f0f78f0 100644
--- a/src/util/virnetdevvlan.h
+++ b/src/util/virnetdevvlan.h
@@ -17,6 +17,7 @@
*
* Authors:
* Laine Stump <laine(a)redhat.com>
+ * James Robson <jrobson(a)websense.com>
*/
#ifndef __VIR_NETDEV_VLAN_H__
@@ -25,6 +26,8 @@
typedef struct _virNetDevVlan virNetDevVlan;
typedef virNetDevVlan *virNetDevVlanPtr;
struct _virNetDevVlan {
+ short int nativeMode; /* 0=off, 1=tagged, 2=untagged */
+ unsigned int nativeTag;
bool trunk; /* true if this is a trunk */
int nTags; /* number of tags in array */
unsigned int *tag; /* pointer to array of tags */
diff --git a/tests/networkxml2xmlin/openvswitch-net.xml
b/tests/networkxml2xmlin/openvswitch-net.xml
index a3d82b1..93c49d5 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='tagged'>
+ <vlan native_mode='tagged' native_tag='123'>
+ <tag id='555'/>
+ <tag id='444'/>
+ </vlan>
+ <virtualport>
+ <parameters profileid='tagged-profile'/>
+ </virtualport>
+ </portgroup>
</network>
diff --git a/tests/networkxml2xmlout/openvswitch-net.xml
b/tests/networkxml2xmlout/openvswitch-net.xml
index a3d82b1..ab3d797 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='tagged'>
+ <vlan trunk='yes' native_mode='tagged' native_tag='123'>
+ <tag id='555'/>
+ <tag id='444'/>
+ </vlan>
+ <virtualport>
+ <parameters profileid='tagged-profile'/>
+ </virtualport>
+ </portgroup>
</network>
Protected by Websense Hosted Email Security -- www.websense.com
11 years, 11 months
