October 2011 - Devel - libvirt List Archives

[libvirt] [libvirt-glib 00/24] libvirt-gconfig patches
by Christophe Fergeau 08 Nov '11

08 Nov '11

Hi, Here is a set of patches which start to implement functionality to libvirt-gconfig. The end result is that the "name", "memory" and "features" properties are implemented for the Domain class. Most of the work is about reworking the low-level plumbing to make the implementation as easy as possible. I chose to remove the xmlDocPtr and the xml string that were stored in GVirConfigObject objects and to replace this with a xmlNodePtr. This is useful when creating children objects (eg devices) when parsing a domain XML because the xmlNodePtr will point at the right position in the XML document. One caveat with that approach is that we need to refcount the xmlDocPtr associated with the xmlNodePtr to know when to free it, but this is not implemented yet (though gupnp seems to have code doing exactly this). Then most of the work is adding properties and helpers to make the code easier to write. And thinking about what API we want to expose to clients :) The two test programs should show how the API can be used as it is now. While writing this, I realized we had to do some "useless" work to return strings from libxml2 to glib, ie I g_strdup the string and xmlFree the source so that the caller can free it with g_free. While writing this code, there were at least 2 questions that arose, some input would be welcome :) * I don't know how to handle XMLs where the same node appears multiple times (eg "name"). If it's the latest name that wins, what do we do when changing the name on such an XML document? only modify the last name node? Drop all the redundant name nodes? * I'm also not sure how to make it possible to check whether a given property is set or not. For strings, this is easy, NULL means that the property was not set, but for integers, this is less obvious. Any thoughts on that? Next I'll have to start looking at more complicated properties :) More API questions on the way I guess... Christophe Christophe Fergeau (23): Add helpers in libvirt-gconfig-helpers.[ch] gvir_config_object_parse: don't parse empty documents Add getters for GVirConfig xmlNode and xmlDoc Add GVirConfigObject::node property Add GVir::Config::Domain::name property Rename gvir_config_domain_new Add gvir_config_domain_new to create an empty domain Implement gvir_config_domain_set_name Make the GVirConfigDomain::name property writable Add gvir_config_object_to_xml Use gvir_config_object_to_xml Add domain creation/parsing test Remove GVirConfigObject::docHandle Remove xml parsing from gvir_config_*_new functions Only do XML parsing when creating config objects Remove GError argument from GVirConfigObject::node getter Remove GVirConfigObject::doc Add gvir_config_object_get_node_content Add gvir_config_object_set_node_content Add test-domain-duplicate.xml which currently fails Validate document in parsing test Add GVirConfigDomain::memory Add GVirConfigDomain::features configure.ac | 1 + examples/Makefile.am | 1 + libvirt-gconfig/Makefile.am | 4 + libvirt-gconfig/libvirt-gconfig-capabilities.c | 10 +- libvirt-gconfig/libvirt-gconfig-capabilities.h | 2 +- libvirt-gconfig/libvirt-gconfig-domain-snapshot.c | 9 +- libvirt-gconfig/libvirt-gconfig-domain-snapshot.h | 2 +- libvirt-gconfig/libvirt-gconfig-domain.c | 186 ++++++++++++++++- libvirt-gconfig/libvirt-gconfig-domain.h | 12 +- libvirt-gconfig/libvirt-gconfig-helpers.c | 179 +++++++++++++++ libvirt-gconfig/libvirt-gconfig-helpers.h | 48 ++++ libvirt-gconfig/libvirt-gconfig-interface.c | 12 +- libvirt-gconfig/libvirt-gconfig-interface.h | 2 +- libvirt-gconfig/libvirt-gconfig-network-filter.c | 8 +- libvirt-gconfig/libvirt-gconfig-network-filter.h | 2 +- libvirt-gconfig/libvirt-gconfig-network.c | 8 +- libvirt-gconfig/libvirt-gconfig-network.h | 2 +- libvirt-gconfig/libvirt-gconfig-node-device.c | 9 +- libvirt-gconfig/libvirt-gconfig-node-device.h | 2 +- libvirt-gconfig/libvirt-gconfig-object.c | 244 ++++++++++++--------- libvirt-gconfig/libvirt-gconfig-object.h | 17 ++- libvirt-gconfig/libvirt-gconfig-secret.c | 8 +- libvirt-gconfig/libvirt-gconfig-secret.h | 2 +- libvirt-gconfig/libvirt-gconfig-storage-pool.c | 8 +- libvirt-gconfig/libvirt-gconfig-storage-pool.h | 2 +- libvirt-gconfig/libvirt-gconfig-storage-vol.c | 12 +- libvirt-gconfig/libvirt-gconfig-storage-vol.h | 2 +- libvirt-gconfig/libvirt-gconfig.h | 2 + libvirt-gconfig/libvirt-gconfig.sym | 11 +- libvirt-gconfig/tests/Makefile.am | 16 ++ libvirt-gconfig/tests/test-domain-create.c | 68 ++++++ libvirt-gconfig/tests/test-domain-duplicate.xml | 7 + libvirt-gconfig/tests/test-domain-invalid.xml | 6 + libvirt-gconfig/tests/test-domain-noname.xml | 4 + libvirt-gconfig/tests/test-domain-parse.c | 87 ++++++++ libvirt-gconfig/tests/test-domain.xml | 7 + libvirt-gobject/Makefile.am | 2 + libvirt-gobject/libvirt-gobject-connection.c | 2 +- libvirt-gobject/libvirt-gobject-domain-snapshot.c | 3 + libvirt-gobject/libvirt-gobject-domain.c | 6 +- libvirt-gobject/libvirt-gobject-interface.c | 3 + libvirt-gobject/libvirt-gobject-network-filter.c | 3 + libvirt-gobject/libvirt-gobject-network.c | 3 + libvirt-gobject/libvirt-gobject-node-device.c | 4 + libvirt-gobject/libvirt-gobject-secret.c | 4 + libvirt-gobject/libvirt-gobject-storage-pool.c | 5 +- libvirt-gobject/libvirt-gobject-storage-vol.c | 3 + 47 files changed, 895 insertions(+), 145 deletions(-) create mode 100644 libvirt-gconfig/libvirt-gconfig-helpers.c create mode 100644 libvirt-gconfig/libvirt-gconfig-helpers.h create mode 100644 libvirt-gconfig/tests/Makefile.am create mode 100644 libvirt-gconfig/tests/test-domain-create.c create mode 100644 libvirt-gconfig/tests/test-domain-duplicate.xml create mode 100644 libvirt-gconfig/tests/test-domain-invalid.xml create mode 100644 libvirt-gconfig/tests/test-domain-noname.xml create mode 100644 libvirt-gconfig/tests/test-domain-parse.c create mode 100644 libvirt-gconfig/tests/test-domain.xml -- 1.7.6.4

3 62

[libvirt] [PATCH 0/7] Allow multiple console devices for each guest
by Daniel P. Berrange 07 Nov '11

07 Nov '11

The current XML schema only allows for a single <console> element per guest. Many hypervisors support multiple paravirt consoles, and it'd be desirable to support that. This series does just that, enabling multiple consoles for UML, QEMU and LXC

3 19

[libvirt] Start of freeze for libvirt-0.9.7 and availability of rc1
by Daniel Veillard 05 Nov '11

05 Nov '11

We are now entering the freeze for libvirt-0.9.7 . We may make an exception for patch set which got a few round of reviews though, like Stefan's ones (v4 IIRC), and anything which we know may need fixing in the API before the release. I have made a release candidate 1 tarball (and associated rpms) at ftp://libvirt.org/libvirt/libvirt-0.9.7-rc1.tar.gz I think I will make an rc2 on Wed or Thu and then try to make the release around Friday of the end of the week if things looks good. Please give it a try ! thanks in advance, Daniel -- Daniel Veillard | libxml Gnome XML XSLT toolkit http://xmlsoft.org/ daniel(a)veillard.com | Rpmfind RPM search engine http://rpmfind.net/ http://veillard.com/ | virtualization library http://libvirt.org/

8 24

[libvirt] [PATCH 1/2] Fix order of disks and controllers
by Jiri Denemark 03 Nov '11

03 Nov '11

Commit 2d6adabd53c8f1858191d521dc9b4948d1205955 replaced qsorting disk and controller devices with inserting them at the right position. That was to fix unnecessary reordering of devices. However, when parsing domain XML devices are just taken in the order in which they appear in the XML since. Use the correct insertion algorithm to honor device target. --- src/conf/domain_conf.c | 4 +- .../qemuxml2argvdata/qemuxml2argv-boot-order.args | 35 ++++++++++++------- tests/qemuxml2argvdata/qemuxml2argv-boot-order.xml | 14 ++++---- tests/xmconfigdata/test-escape-paths.cfg | 2 +- tests/xmconfigdata/test-escape-paths.xml | 10 +++--- 5 files changed, 37 insertions(+), 28 deletions(-) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index b406202..48ed7eb 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -5883,7 +5883,7 @@ static virDomainDefPtr virDomainDefParseXML(virCapsPtr caps, if (!disk) goto error; - def->disks[def->ndisks++] = disk; + virDomainDiskInsertPreAlloced(def, disk); } VIR_FREE(nodes); @@ -5899,7 +5899,7 @@ static virDomainDefPtr virDomainDefParseXML(virCapsPtr caps, if (!controller) goto error; - def->controllers[def->ncontrollers++] = controller; + virDomainControllerInsertPreAlloced(def, controller); } VIR_FREE(nodes); diff --git a/tests/qemuxml2argvdata/qemuxml2argv-boot-order.args b/tests/qemuxml2argvdata/qemuxml2argv-boot-order.args index 23249f3..14367b1 100644 --- a/tests/qemuxml2argvdata/qemuxml2argv-boot-order.args +++ b/tests/qemuxml2argvdata/qemuxml2argv-boot-order.args @@ -1,13 +1,22 @@ -LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M \ -pc -m 214 -smp 1 -nographic -nodefaults -monitor unix:/tmp/test-monitor,server,\ -nowait -no-acpi -drive file=/dev/HostVG/QEMUGuest1,if=none,id=drive-ide0-0-0 \ --device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -drive \ -file=sheepdog:example.org:6000:image,if=none,id=drive-virtio-disk0 -device \ -virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,\ -bootindex=3 -drive file=/root/boot.iso,if=none,media=cdrom,id=drive-ide0-1-0 \ --device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0,\ -bootindex=1 -drive file=/dev/null,if=none,id=drive-fdc0-0-1 -global \ -isa-fdc.driveB=drive-fdc0-0-1 -global isa-fdc.bootindexB=4 -device \ -virtio-net-pci,vlan=0,id=net0,mac=00:11:22:33:44:55,bus=pci.0,addr=0x3,\ -bootindex=2 -net user,vlan=0,name=hostnet0 -usb -device virtio-balloon-pci,\ -id=balloon0,bus=pci.0,addr=0x5 +LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu \ +-S \ +-M pc \ +-m 214 \ +-smp 1 \ +-nographic \ +-nodefaults \ +-monitor unix:/tmp/test-monitor,server,nowait \ +-no-acpi \ +-drive file=/dev/HostVG/QEMUGuest1,if=none,id=drive-ide0-0-0 \ +-device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 \ +-drive file=/root/boot.iso,if=none,media=cdrom,id=drive-ide0-1-0 \ +-device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0,bootindex=1 \ +-drive file=sheepdog:example.org:6000:image,if=none,id=drive-virtio-disk0 \ +-device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=3 \ +-drive file=/dev/null,if=none,id=drive-fdc0-0-1 \ +-global isa-fdc.driveB=drive-fdc0-0-1 \ +-global isa-fdc.bootindexB=4 \ +-device virtio-net-pci,vlan=0,id=net0,mac=00:11:22:33:44:55,bus=pci.0,addr=0x3,bootindex=2 \ +-net user,vlan=0,name=hostnet0 \ +-usb \ +-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 diff --git a/tests/qemuxml2argvdata/qemuxml2argv-boot-order.xml b/tests/qemuxml2argvdata/qemuxml2argv-boot-order.xml index ba8a9b2..0022c92 100644 --- a/tests/qemuxml2argvdata/qemuxml2argv-boot-order.xml +++ b/tests/qemuxml2argvdata/qemuxml2argv-boot-order.xml @@ -18,6 +18,13 @@ <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> + <disk type='file' device='cdrom'> + <source file='/root/boot.iso'/> + <target dev='hdc' bus='ide'/> + <boot order='1'/> + <readonly/> + <address type='drive' controller='0' bus='1' unit='0'/> + </disk> <disk type='network' device='disk'> <driver name='qemu' type='raw'/> <source protocol='sheepdog' name='image'> @@ -26,13 +33,6 @@ <target dev='vda' bus='virtio'/> <boot order='3'/> </disk> - <disk type='file' device='cdrom'> - <source file='/root/boot.iso'/> - <target dev='hdc' bus='ide'/> - <boot order='1'/> - <readonly/> - <address type='drive' controller='0' bus='1' unit='0'/> - </disk> <disk type='file' device='floppy'> <driver name='qemu' type='raw'/> <source file='/dev/null'/> diff --git a/tests/xmconfigdata/test-escape-paths.cfg b/tests/xmconfigdata/test-escape-paths.cfg index e3e6db9..13be2a0 100644 --- a/tests/xmconfigdata/test-escape-paths.cfg +++ b/tests/xmconfigdata/test-escape-paths.cfg @@ -19,7 +19,7 @@ vnc = 1 vncunused = 1 vnclisten = "127.0.0.1" vncpasswd = "123poi" -disk = [ "phy:/dev/HostVG/XenGuest2,hda,w", "file:/root/boot.iso&test,hdc:cdrom,r", """phy:/dev/HostVG/XenGuest'",hdb,w""" ] +disk = [ "phy:/dev/HostVG/XenGuest2,hda,w", """phy:/dev/HostVG/XenGuest'",hdb,w""", "file:/root/boot.iso&test,hdc:cdrom,r" ] vif = [ "mac=00:16:3e:66:92:9c,bridge=xenbr1,script=vif-bridge,model=e1000,type=ioemu" ] parallel = "none" serial = "none" diff --git a/tests/xmconfigdata/test-escape-paths.xml b/tests/xmconfigdata/test-escape-paths.xml index 13e6e29..9eaf90c 100644 --- a/tests/xmconfigdata/test-escape-paths.xml +++ b/tests/xmconfigdata/test-escape-paths.xml @@ -25,17 +25,17 @@ <source dev='/dev/HostVG/XenGuest2'/> <target dev='hda' bus='ide'/> </disk> + <disk type='block' device='disk'> + <driver name='phy'/> + <source dev='/dev/HostVG/XenGuest'"'/> + <target dev='hdb' bus='ide'/> + </disk> <disk type='file' device='cdrom'> <driver name='file'/> <source file='/root/boot.iso&test'/> <target dev='hdc' bus='ide'/> <readonly/> </disk> - <disk type='block' device='disk'> - <driver name='phy'/> - <source dev='/dev/HostVG/XenGuest'"'/> - <target dev='hdb' bus='ide'/> - </disk> <interface type='bridge'> <mac address='00:16:3e:66:92:9c'/> <source bridge='xenbr1'/> -- 1.7.5.3

4 21

[libvirt] Notes from the KVM Forum relevant to libvirt
by Daniel P. Berrange 02 Nov '11

02 Nov '11

I was at the KVM Forum / LinuxCon last week and there were many interesting things discussed which are relevant to ongoing libvirt development. Here was the list that caught my attention. If I have missed any, fill in the gaps.... - Sandbox/container KVM. The Solaris port of KVM puts QEMU inside a zone so that an exploit of QEMU can't escape into the full OS. Containers are Linux's parallel of Zones, and while not nearly as secure yet, it would still be worth using more containers support to confine QEMU. - Events for object changes. We already have async events for virDomainPtr. We need the same for virInterfacePtr, virStoragePoolPtr, virStorageVolPtr and virNodeDevPtr, so that at the very least applications can be notified when objects are created or removed. For virNodeDevPtr we also want to be notified when properties change (ie CDROM media change). - CGroups passthrough. There is alot of experimentation with cgroups. We don't want to expose cgroups as a direct concept in the libvirt API, but we should consider putting a generic cgroups get/set in the libvirt-qemu.so library, or create a libvirt-linux.so library. Also likely add a <linux:cgroups> XML element to store arbitrary tunables in the XML. Same (low) level of support as with qemu:XXX of course - CPUSet for changing CPU + Memory NUMA pinning. The CPUset cgroups controller is able to actually move a guest's memory between NUMA nodes. We can already change VCPU pinning, but we need a new API to do node pinning of the whole VM, so we can ensure the I/O threads are also moved. We also need an API to move the memory pinning to new nodes. - Guest NUMA topology. If we have guests with RAM size > node size, we need to expose a NUMA topology into the guest. The CPU/memory pinning APIs will also need to be able to pin individual guest NUMA nodes to individual host NUMA nodes. - AHCI controller. IDE is going the way of the dodo. We need to add support for QEMU's new AHCI controller. This is quite simple, we already have a 'sata' disk type we can wire up to QEMU - VFIO PCI passthru. The current PCI assignment code may well be changed to use something called 'VFIO'. This will need some work in libvirt to support new CLI arg syntax, and probably some SELinux work - QCow3. There will soon be a QCow3 format. We need to add code to detect it and extract backing stores, etc. Trivial since the primary header format will still be the same as QCow2. - QMP completion. Given anthony's plan for a complete replacement of the current CLI + monitor syntax in QEMU 2.0 (long way out), he has dropped objections to adding new commands to QMP in the near future. So all existing HMP commands will immediately be made available in QMP with no attempt to re-design them now. So the need for the HMP passthrough command will soon go away. - Migration + VEPA/VNLink failures. As raised previously on this list, Cisco really wants libvirt to have the ability to do migration, and optionally *not* fail, even if the VEPA/VNLink setup fails. This will require an event notification to the app if a failure of a device backend occurs, and an API to let the admin app fix the device backend (virDomainUpdateDevice) and some way to tell migration what bits are allowed to fail. - Virtio SCSI. We need to support this new stuff in QEMU when it is eventually implemented. It will mean we avoid the PCI slot usage problems inherant in virtio-blk, and get other things like multipath and decent SCSI passthrough support. - USB 2.0. We need to support this in libvirt asap. It is very important for desktop experiance and to support better integration with SPICE This also gets us proper USB port addressing. Fun footnote, QEMU USB has *never* supported migration. The USB tablet only works by sheer luck, as OS' see the device disappear on migration & come back with different device ID/port addr and so does a re-initialize ! - Native KVM tool. The problem statement was that the QEMU code is too big/complex & and command line args are too complex, so lets rewrite from scratch to make the code small & CLI simple. They achieve this, but of course primarily because they lack so many features compared to QEMU. They had libvirt support as a bullet point on their preso, but I'm not expecting it to replace the current QEMU KVM support in the forseeable future, given its current level of features and the size of its dev team compared to QEMU/KVM. They did have some fun demos of booting using the host OS filesystem though. We can actually do the same with regular KVM/libvirt but there's no nice demo tool to show it off. I'm hoping to create one.... - Shared memory devices. Some people doing high performance work are using the QEMU shared memory device. We don't support this (ivhshm device) in libvirt yet. Fairly niche use cases but might be nice to have this. - SDK / Docs. Request for a more SDK like approach to KVM development tools and documentation. Also want to simplify libvirt operations. The exposure of the virt-install internal API as official GObjects would have significantly helped the project Ricardo (from IBM) described in his presentation. Of course no one can argue that we need more documentation in every area. - USB managed mode. As we do with PCI passthrough, we should be able to detach USB device from host OS, and perform a reset before attaching to the guest, and most importantly track which USB devices have been given to which guest, so we don't duplicate assign. We have all neccessary APIs, just need to wire them up. - PCI passthrough. We need to support setting of MAC addr, VLAN and VEPA/VNLink properties against VFs from SRIOV NICs that are assigned to a guest. For those who were not at the KVM Forum, the presentations are already available online at: http://www.linux-kvm.org/page/KVM_Forum_2011 All the session were also video recorded, so sometime in the next week or two, there should be OGG videos of the talks being uploaded to the same site. Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|

6 13

[libvirt] [PATCH 1/2] docs: improve typed parameter documentation
by Eric Blake 02 Nov '11

02 Nov '11

virDomainBlockStatsFlags was missing a check that was present in virDomainGetMemoryParameters. Additionally, I found that the existing descriptions were a bit hard to read. A later patch will fix qemu to return fewer than max parameters if @nparams was too small on input, rather than outright fail. * src/libvirt.c (virDomainGetMemoryParameters) (virDomainGetBlkioParameters, virDomainGetSchedulerParameters) (virDomainGetSchedulerParametersFlags): Tweak documentation wording. (virDomainBlockStatsFlags): Likewise, and add sanity check. --- src/libvirt.c | 100 +++++++++++++++++++++++++++++++++++++-------------------- 1 files changed, 65 insertions(+), 35 deletions(-) diff --git a/src/libvirt.c b/src/libvirt.c index e9d1a29..f9cddef 100644 --- a/src/libvirt.c +++ b/src/libvirt.c @@ -3639,15 +3639,17 @@ error: * @domain: pointer to domain object * @params: pointer to memory parameter object * (return value, allocated by the caller) - * @nparams: pointer to number of memory parameters + * @nparams: pointer to number of memory parameters; input and output * @flags: one of virDomainModificationImpact * - * Get all memory parameters, the @params array will be filled with the values - * equal to the number of parameters suggested by @nparams + * Get all memory parameters. On input, @nparams gives the size of the + * @params array; on output, @nparams gives how many slots were filled + * with parameter information, which might be less but will not exceed + * the input value. * - * As the value of @nparams is dynamic, call the API setting @nparams to 0 and - * @params as NULL, the API returns the number of parameters supported by the - * HV by updating @nparams on SUCCESS. The caller should then allocate @params + * As a special case, calling with @params as NULL and @nparams as 0 on + * input will cause @nparams on output to contain the number of parameters + * supported by the hypervisor. The caller should then allocate @params * array, i.e. (sizeof(@virTypedParameter) * @nparams) bytes and call the API * again. * @@ -3765,12 +3767,21 @@ error: * @domain: pointer to domain object * @params: pointer to blkio parameter object * (return value, allocated by the caller) - * @nparams: pointer to number of blkio parameters + * @nparams: pointer to number of blkio parameters; input and output * @flags: an OR'ed set of virDomainModificationImpact * - * Get all blkio parameters, the @params array will be filled with the values - * equal to the number of parameters suggested by @nparams. - * See virDomainGetMemoryParameters for an equivalent usage example. + * Get all blkio parameters. On input, @nparams gives the size of the + * @params array; on output, @nparams gives how many slots were filled + * with parameter information, which might be less but will not exceed + * the input value. + * + * As a special case, calling with @params as NULL and @nparams as 0 on + * input will cause @nparams on output to contain the number of parameters + * supported by the hypervisor. The caller should then allocate @params + * array, i.e. (sizeof(@virTypedParameter) * @nparams) bytes and call the API + * again. + * + * See virDomainGetMemoryParameters() for an equivalent usage example. * * This function may require privileged access to the hypervisor. This function * expects the caller to allocate the @params. @@ -6335,14 +6346,17 @@ error: * @params: pointer to scheduler parameter objects * (return value) * @nparams: pointer to number of scheduler parameter objects - * (this value must be at least as large as the returned value - * nparams of virDomainGetSchedulerType) + * (this value should generally be as large as the returned value + * nparams of virDomainGetSchedulerType()); input and output + * + * Get all scheduler parameters. On input, @nparams gives the size of the + * @params array; on output, @nparams gives how many slots were filled + * with parameter information, which might be less but will not exceed + * the input value. @nparams cannot be 0. * - * Get all scheduler parameters, the @params array will be filled with the - * values and @nparams will be updated to the number of valid elements in - * @params. It is hypervisor specific whether this returns the live or + * It is hypervisor specific whether this returns the live or * persistent state; for more control, use - * virDomainGetSchedulerParametersFlags. + * virDomainGetSchedulerParametersFlags(). * * Returns -1 in case of error, 0 in case of success. */ @@ -6391,15 +6405,28 @@ error: * (return value) * @nparams: pointer to number of scheduler parameter * (this value should be same than the returned value - * nparams of virDomainGetSchedulerType) + * nparams of virDomainGetSchedulerType()); input and output * @flags: one of virDomainModificationImpact * - * Get the scheduler parameters, the @params array will be filled with the - * values. + * Get all scheduler parameters. On input, @nparams gives the size of the + * @params array; on output, @nparams gives how many slots were filled + * with parameter information, which might be less but will not exceed + * the input value. @nparams cannot be 0. * * The value of @flags can be exactly VIR_DOMAIN_AFFECT_CURRENT, * VIR_DOMAIN_AFFECT_LIVE, or VIR_DOMAIN_AFFECT_CONFIG. * + * Here is a sample code snippet: + * + * char *ret = virDomainGetSchedulerType(dom, &nparams); + * if (ret && nparams != 0) { + * if ((params = malloc(sizeof(*params) * nparams)) == NULL) + * goto error; + * memset(params, 0, sizeof(*params) * nparams); + * if (virDomainGetSchedulerParametersFlags(dom, params, &nparams, 0)) + * goto error; + * } + * * Returns -1 in case of error, 0 in case of success. */ int @@ -6633,8 +6660,8 @@ error: * @path: path to the block device * @params: pointer to block stats parameter object * (return value) - * @nparams: pointer to number of block stats - * @flags: unused, always passes 0 + * @nparams: pointer to number of block stats; input and output + * @flags: unused, always pass 0 * * This function is to get block stats parameters for block * devices attached to the domain. @@ -6646,24 +6673,26 @@ error: * Domains may have more than one block device. To get stats for * each you should make multiple calls to this function. * - * The @params array will be filled with the value equal to the number of - * parameters suggested by @nparams. + * On input, @nparams gives the size of the @params array; on output, + * @nparams gives how many slots were filled with parameter + * information, which might be less but will not exceed the input + * value. * - * As the value of @nparams is dynamic, call the API setting @nparams to 0 and - * @params as NULL, the API returns the number of parameters supported by the - * HV by updating @nparams on SUCCESS. (Note that block device of different type - * might support different parameters numbers, so it might be necessary to compute - * @nparams for each block device type). The caller should then allocate @params + * As a special case, calling with @params as NULL and @nparams as 0 on + * input will cause @nparams on output to contain the number of parameters + * supported by the hypervisor. (Note that block devices of different types + * might support different parameters, so it might be necessary to compute + * @nparams for each block device). The caller should then allocate @params * array, i.e. (sizeof(@virTypedParameter) * @nparams) bytes and call the API - * again. See virDomainGetMemoryParameters for more details. + * again. See virDomainGetMemoryParameters() for more details. * * Returns -1 in case of error, 0 in case of success. */ -int virDomainBlockStatsFlags (virDomainPtr dom, - const char *path, - virTypedParameterPtr params, - int *nparams, - unsigned int flags) +int virDomainBlockStatsFlags(virDomainPtr dom, + const char *path, + virTypedParameterPtr params, + int *nparams, + unsigned int flags) { virConnectPtr conn; @@ -6677,7 +6706,8 @@ int virDomainBlockStatsFlags (virDomainPtr dom, virDispatchError(NULL); return -1; } - if (!path || (nparams == NULL) || (*nparams < 0)) { + if (!path || (nparams == NULL) || (*nparams < 0) || + (params == NULL && *nparams != 0)) { virLibConnError(VIR_ERR_INVALID_ARG, __FUNCTION__); goto error; } -- 1.7.4.4

4 7

[libvirt] RFC decoupling VM NIC provisioning from VM NIC connection to backend networks
by Sumit Naiksatam (snaiksat) 02 Nov '11

02 Nov '11

Hi, In its current implementation Libvirt makes sure that the network interfaces that it passes/provision to a VM (for example to qemu[-kvm]) are already connected to its backend (interfaces/networks) by the time the VM starts its boot process. In a non virtualized setup it would be like booting a machine with the Ethernet cable already plugged into a router/switch port. While in a non virtualized setup you can boot a machine first (with no physical connection to a router/switch) and later connect its NIC/s to the switch/router, when you boot a VM via Libvirt it is not possible to decouple the two actions (VM boot, cable plug/unplug). An example of case where the capability of decoupling the two actions mentioned above is a requirement in Quantum/NetStack which is the network service leveraged by OpenStack. The modular design of OpenStack allows you to: - provision VMs with NIC/s - create networks - create ports on networks - plug/unplug a VM NIC into/from a given port on a network (at runtime) Note that this runtime plug/unplug requirement has nothing to do with hot plug/unplug of NICs. The idea is more that of decoupling the provisioning of a VM from the connection of the VM to the network/s. This would make it possible to change (at run-time too) the networks the NIC/s of a given VM are connected to. For example, when a VM boots, its interfaces should be in link down state if the network admin has not connected the VM NIC/s to any "network" yet. Even though libvirt already provides a way to change the link state of an a VM NIC, link state and physical connection are two different things and should be manageable independently. Ideally the configuration syntax should be interface type and hypervisor type agnostic. Let's take QEMU[-kvm] as an example - when Libvirt starts a QEMU VM, it passes to QEMU a number of file descriptors that map to host backend interfaces (for example macvtap interfaces). In order to introduce this runtime plug/unplug capability, we need a mechanism that permits to delay the binding between the host macvtap interfaces and the guest taps (because you cannot know the fd of the macvtap interfaces before you create them). This means you need a mechanism that allows you to change such fd/s at runtime: - you can close/reset an fd (ie, when you disconnect a VM NIC from its network) - you can open/set an fd (ie, when you connect a VM NIC to a network) This could probably be a libvirt command that translates to a QEMU monitor command. Can the runtime plug/unplug capability described above be achieved (cleanly) with another mechanism? Is anybody working on implementing something similar? [For more information on OpenStack/NetStack/Quantum and the above requirements please refer to the network model used therein: http://docs.openstack.org/incubation/openstack-network/admin/content/Wha tIsQuantum.html (information on network, port, and attachment abstractions) http://www.slideshare.net/danwent/quantum-diablo-summary (slides 7 & 8)] Thanks, ~Sumit Naiksatam. (On behalf of OpenStack/Quantum team)

4 6

[libvirt] [PATCH] esx: Support vSphere 5.x
by Patrice LACHANCE 01 Nov '11

01 Nov '11

Hello Based on http://www.redhat.com/archives/libvir-list/2010-July/msg00480.html, I created this quick patch to accept connection to vSphere 5.x Notes: - I had to remove the warnings for version > 4.1 & 5 because they were generating errors when running scripts encapsulating virsh commands with opennebula. A better option might be to relie on an environment variable (for example DONT_BLAME_LIBVIRT!) to toggle warnings on/off - Ran only a few tests but it works as expected. - Next steps should be to work on VMware API 5. integration Patrice diff --git a/src/esx/esx_driver.c b/src/esx/esx_driver.c index 41086ef..78872d4 100644 --- a/src/esx/esx_driver.c +++ b/src/esx/esx_driver.c @@ -730,9 +730,11 @@ esxConnectToHost(esxPrivate *priv, virConnectAuthPtr auth, if (priv->host->productVersion != esxVI_ProductVersion_ESX35 && priv->host->productVersion != esxVI_ProductVersion_ESX40 && priv->host->productVersion != esxVI_ProductVersion_ESX41 && - priv->host->productVersion != esxVI_ProductVersion_ESX4x) { + priv->host->productVersion != esxVI_ProductVersion_ESX4x && + priv->host->productVersion != esxVI_ProductVersion_ESX50 && + priv->host->productVersion != esxVI_ProductVersion_ESX5x) { ESX_ERROR(VIR_ERR_INTERNAL_ERROR, - _("%s is neither an ESX 3.5 host nor an ESX 4.x host"), + _("%s is neither an ESX 3.5, 4.x nor 5.x host"), hostname); goto cleanup; } @@ -857,10 +859,11 @@ esxConnectToVCenter(esxPrivate *priv, virConnectAuthPtr auth, if (priv->vCenter->productVersion != esxVI_ProductVersion_VPX25 && priv->vCenter->productVersion != esxVI_ProductVersion_VPX40 && priv->vCenter->productVersion != esxVI_ProductVersion_VPX41 && - priv->vCenter->productVersion != esxVI_ProductVersion_VPX4x) { + priv->vCenter->productVersion != esxVI_ProductVersion_VPX4x && + priv->vCenter->productVersion != esxVI_ProductVersion_VPX50 && + priv->vCenter->productVersion != esxVI_ProductVersion_VPX5x) { ESX_ERROR(VIR_ERR_INTERNAL_ERROR, - _("%s is neither a vCenter 2.5 server nor a vCenter " - "4.x server"), hostname); + _("%s is neither a vCenter 2.5, 4.x nor 5.x server"), hostname); goto cleanup; } diff --git a/src/esx/esx_vi.c b/src/esx/esx_vi.c index 325157c..3a11116 100644 --- a/src/esx/esx_vi.c +++ b/src/esx/esx_vi.c @@ -675,9 +675,23 @@ esxVI_Context_Connect(esxVI_Context *ctx, const char *url, VIR_WARN("Found untested VI API major/minor version '%s'", ctx->service->about->apiVersion); + } else if (STRPREFIX(ctx->service->about->apiVersion, "5.0")) { + ctx->apiVersion = esxVI_APIVersion_50; + + /* + VIR_WARN("Found untested VI API major/minor version '%s'", + ctx->service->about->apiVersion); + */ + } else if (STRPREFIX(ctx->service->about->apiVersion, "5.")) { + ctx->apiVersion = esxVI_APIVersion_5x; + + /* + VIR_WARN("Found untested VI API major/minor version '%s'", + ctx->service->about->apiVersion); + */ } else { ESX_VI_ERROR(VIR_ERR_INTERNAL_ERROR, - _("Expecting VI API major/minor version '2.5' or '4.x' " + _("Expecting VI API major/minor version '2.5', '4.x' or '5.x' " "but found '%s'"), ctx->service->about->apiVersion); return -1; } @@ -704,10 +718,24 @@ esxVI_Context_Connect(esxVI_Context *ctx, const char *url, VIR_WARN("Found untested ESX major/minor version '%s'", ctx->service->about->version); + } else if (STRPREFIX(ctx->service->about->version, "5.0")) { + ctx->productVersion = esxVI_ProductVersion_ESX50; + + /* + VIR_WARN("Found untested ESX major/minor version '%s'", + ctx->service->about->version); + */ + } else if (STRPREFIX(ctx->service->about->version, "5.")) { + ctx->productVersion = esxVI_ProductVersion_ESX5x; + + /* + VIR_WARN("Found untested ESX major/minor version '%s'", + ctx->service->about->version); + */ } else { ESX_VI_ERROR(VIR_ERR_INTERNAL_ERROR, - _("Expecting ESX major/minor version '3.5' or " - "'4.x' but found '%s'"), + _("Expecting ESX major/minor version '3.5', '4.x' or " + "'5.x' but found '%s'"), ctx->service->about->version); return -1; } @@ -723,9 +751,23 @@ esxVI_Context_Connect(esxVI_Context *ctx, const char *url, VIR_WARN("Found untested VPX major/minor version '%s'", ctx->service->about->version); + } else if (STRPREFIX(ctx->service->about->version, "5.0")) { + ctx->productVersion = esxVI_ProductVersion_VPX50; + + /* + VIR_WARN("Found untested VPX major/minor version '%s'", + ctx->service->about->version); + */ + } else if (STRPREFIX(ctx->service->about->version, "5.")) { + ctx->productVersion = esxVI_ProductVersion_VPX5x; + + /* + VIR_WARN("Found untested VPX major/minor version '%s'", + ctx->service->about->version); + */ } else { ESX_VI_ERROR(VIR_ERR_INTERNAL_ERROR, - _("Expecting VPX major/minor version '2.5' or '4.x' " + _("Expecting VPX major/minor version '2.5', '4.x' or '5.x' " "but found '%s'"), ctx->service->about->version); return -1; } @@ -3919,6 +3961,12 @@ esxVI_ProductVersionToDefaultVirtualHWVersion(esxVI_ProductVersion productVersio case esxVI_ProductVersion_VPX4x: return 7; + case esxVI_ProductVersion_ESX50: + case esxVI_ProductVersion_VPX50: + case esxVI_ProductVersion_ESX5x: + case esxVI_ProductVersion_VPX5x: + return 8; + default: ESX_VI_ERROR(VIR_ERR_INTERNAL_ERROR, "%s", _("Unexpected product version")); diff --git a/src/esx/esx_vi.h b/src/esx/esx_vi.h index b8e921f..fbf3fb2 100644 --- a/src/esx/esx_vi.h +++ b/src/esx/esx_vi.h @@ -99,7 +99,9 @@ enum _esxVI_APIVersion { esxVI_APIVersion_25, esxVI_APIVersion_40, esxVI_APIVersion_41, - esxVI_APIVersion_4x /* > 4.1 */ + esxVI_APIVersion_4x, + esxVI_APIVersion_50, + esxVI_APIVersion_5x /* > 5.0 */ }; /* @@ -116,13 +118,17 @@ enum _esxVI_ProductVersion { esxVI_ProductVersion_ESX35 = esxVI_ProductVersion_ESX | 1, esxVI_ProductVersion_ESX40 = esxVI_ProductVersion_ESX | 2, esxVI_ProductVersion_ESX41 = esxVI_ProductVersion_ESX | 3, - esxVI_ProductVersion_ESX4x = esxVI_ProductVersion_ESX | 4, /* > 4.1 */ + esxVI_ProductVersion_ESX4x = esxVI_ProductVersion_ESX | 4, + esxVI_ProductVersion_ESX50 = esxVI_ProductVersion_ESX | 5, + esxVI_ProductVersion_ESX5x = esxVI_ProductVersion_ESX | 6, /* > 5.0 */ esxVI_ProductVersion_VPX = (1 << 2) << 16, esxVI_ProductVersion_VPX25 = esxVI_ProductVersion_VPX | 1, esxVI_ProductVersion_VPX40 = esxVI_ProductVersion_VPX | 2, esxVI_ProductVersion_VPX41 = esxVI_ProductVersion_VPX | 3, - esxVI_ProductVersion_VPX4x = esxVI_ProductVersion_VPX | 4 /* > 4.1 */ + esxVI_ProductVersion_VPX4x = esxVI_ProductVersion_VPX | 4, + esxVI_ProductVersion_VPX50 = esxVI_ProductVersion_VPX | 5, + esxVI_ProductVersion_VPX5x = esxVI_ProductVersion_VPX | 6 /* > 5.0 */ }; enum _esxVI_Occurrence {

2 1

[libvirt] [PATCH] Fix storage pool source comparison to avoid comparing with self
by Daniel P. Berrange 01 Nov '11

01 Nov '11

From: "Daniel P. Berrange" <berrange(a)redhat.com> If we are comparing storage pools we must skip comparing with ourself, so that re-defining an existing pool works * conf/storage_conf.c: Skip self when comparing --- src/conf/storage_conf.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/src/conf/storage_conf.c b/src/conf/storage_conf.c index e893b2d..eb39198 100644 --- a/src/conf/storage_conf.c +++ b/src/conf/storage_conf.c @@ -1730,6 +1730,10 @@ int virStoragePoolSourceFindDuplicate(virStoragePoolObjListPtr pools, if (def->type != pool->def->type) continue; + /* Don't mach against ourself if re-defining existing pool ! */ + if (STREQ(pool->def->name, def->name)) + continue; + virStoragePoolObjLock(pool); switch (pool->def->type) { -- 1.7.6.4

3 3

[libvirt] [PATCH] qemu: plug memory leak
by ajia＠redhat.com 01 Nov '11

01 Nov '11

From: Alex Jia <ajia(a)redhat.com> Detected by Coverity. Leak introduced in commit 6cabc0b. * src/qemu/qemu_command.c: Clean up on failure. Signed-off-by: Alex Jia <ajia(a)redhat.com> --- src/qemu/qemu_command.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 0936492..02958cb 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -4995,6 +4995,7 @@ qemuBuildCommandLine(virConnectPtr conn, } if (sound->model == VIR_DOMAIN_SOUND_MODEL_ICH6) { + VIR_FREE(modstr); qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("this QEMU binary lacks hda support")); goto error; -- 1.7.1

3 4