December 2009 - Devel - libvirt List Archives

Re: [libvirt] getSchedulerParameters() always returning nullpointerexception in JAVA
by Frederic Dang Tran 17 Dec '09

17 Dec '09

Hi, I came across the same problem: Domain.getSchedulerParameters() throws a NullPointerException systematically. getSchedulerParameters The culprit is the org.libvirt.jna.virSchedParameterValue class which should inherit from jna.Union instead of Structure: public class virSchedParameterValue extends Union { ... } Regards, Frederic On 12/14/2009 04:22 AM, Marc Gonzalez Mateo wrote: OK, let's see if Bryan has an idea/solution about this. Thanks guys! MARC El 11/12/2009, a las 14:29, Daniel Veillard escribió: On Fri, Dec 11, 2009 at 02:01:36PM +0100, Marc Gonzalez Mateo wrote: Hi everyvody, I'm developing a new API based on libvirt. I'm currently stucked using getSchedulerParameters, always is returning a nullpointerexception, no matter which Xen Domain I'm passing to the function. Enclosing both the code and the error console: public int getCPUPriority(String name) { int res=-1; try { Domain d = getDomain(name); SchedParameter[] pars = d.getSchedulerParameters(); Hum, it seems Domain.getSchedulerParameters() does SchedParameter[] returnValue = new SchedParameter[0]; and public static SchedParameter create(virSchedParameter vParam) { SchedParameter returnValue = null; switch (vParam.type) { case (1): and the create method getting there gets a null pointer as the initialization argument, which it first dereference ... so not surprizing looking at the code, maybe Bryan has an idea of what is going on there, I'm a bit lost in this initialization process ... Daniel for (SchedParameter pri : pars) { if (pri.field=="weight") res=Integer.parseInt(pri.getValueAsString()); } } catch (LibvirtException e) { log.error(" Error: getting CPU priority of \""+name+"\"." + e.getClass()); e.printStackTrace(); } return res; } Dec 11, 2009 1:04:18 PM net.emotivecloud.virtmonitor.VirtMonitor getCPUCapacity SEVERE: Error: getting CPU capacity of "XenTest". java.lang.NullPointerException at org.libvirt.SchedParameter.create(Unknown Source) at org.libvirt.Domain.getSchedulerParameters(Unknown Source) at net.emotivecloud.virtmonitor.VirtMonitor.getCPUCapacity(VirtMonitor.java:462) at net.emotivecloud.virtmonitor.VirtMonitor.main(VirtMonitor.java:763) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:616) at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:283) at java.lang.Thread.run(Thread.java:636) Any ideas? Thanks in advance, Marc Gonzalez Mateo -- Libvir-list mailing list Libvir-list redhat com https://www.redhat.com/mailman/listinfo/libvir-list -- Daniel Veillard | libxml Gnome XML XSLT toolkit http://xmlsoft.org/ daniel veillard com | Rpmfind RPM search engine http://rpmfind.net/ http://veillard.com/ | virtualization library http://libvirt.org/ Frederic Dang Tran

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[libvirt] [RFC] New libvirt API for domain memory statistics reporting (V2)
by Adam Litke 17 Dec '09

17 Dec '09

Thanks for the review and comments on V1. This series tries to address most of the feedback I received. I did not add any additional memory stats yet (I feel that with my new method of expanding the API, that can be handled separately). I am not convinced that every memory stat that any hypervisor exports should necessarily be included in this API. I tried to focus on statistics that are useful in the context of managing domains at the hypervisor level. Changes since V1: * New system for maintaining ABI compatibility and API extensibility: Rather than passing around a fixed-size stats structure, work with arrays of stats. An enum of known statistic tags (SWAP_IN, SWAP_OUT, TOTAL_MEM, etc) is defined. A stat is defined as a tag/value pair. When making a call to the API, the caller provides an array of stats and the size of the array. That array is filled with up to the requested number of stats (depending on hypervisor and guest support). The number of stats provided is returned. * Miscellaneous changes: Changed the API function from virDomainMemStats to virDomainMemoryStats Added documentation for each memory stat -- When using ballooning to manage overcommitted memory on a host, a system for guests to communicate their memory usage to the host can provide information that will minimize the impact of ballooning on the guests while maximizing efficient use of host memory. The design of such a communication channel was recently added to version 0.8.2 of the VirtIO Spec (See Appendix G): - http://ozlabs.org/~rusty/virtio-spec/virtio-spec-0.8.2.pdf Host-side and guest-side implementations have been accepted for inclusion in their respective projects: - Guest: http://lkml.org/lkml/2009/11/30/274 - Host: http://lists.gnu.org/archive/html/qemu-devel/2009-12/msg00380.html The following patch series implements a new libvirt interface to expose these memory statistics. Thank you for your review and comments. [PATCH 1/6] domMemStats: Add domainMemoryStats method to struct _virDriver [PATCH 2/6] domMemoryStats: Add public symbol to libvirt API [PATCH 3/6] qemu-driver: Enable domainMemStats in the qemu driver [PATCH 4/6] remote-driver: Add domainMemoryStats support [PATCH 5/6] virsh: Enable virDomainMemoryStats as a new command [PATCH 6/6] python: Add python bindings for virDomainMemoryStats

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[libvirt] Licensing of the schemas?
by Diego Elio “Flameeyes” Pettenò 17 Dec '09

17 Dec '09

Hi, I've finally found the time to backport the schema fixes and I'm going to add the nxml-libvirt-schemas package to Portage so that those like me who like to edit the XML files with Emacs can do so with some support. But I didn't pay enough attention before that the .rng files lack a license header. I'd assume that the license of the package (LGPL-2.1) apply to the schema, but it would be nice if somebody could confirm that for me (and eventually somebody, me even, could add the proper headers to them). Thanks, -- Diego Elio Pettenò — “Flameeyes” http://blog.flameeyes.eu/ If you found a .asc file in this mail and know not what it is, it's a GnuPG digital signature: http://www.gnupg.org/

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[libvirt] [PATCH v3 00/13] CPU selection patches
by Jiri Denemark 17 Dec '09

17 Dec '09

Hi, This is a third version of CPU selection patchset. Changes in version 3: - fix build and segfault on i386 Changes in version 2: - virConnectGetHostCPU() API call was completely removed - 'CPU driver implementation' (11/14) patch was dropped - virConnectCompareCPU() API call is implemented directly by hypervisor drivers - new cpuCompareXML() internal function to make virConnectCompareCPU() simpler Jirka Jiri Denemark (13): XML schema for CPU flags XML parsing/formating code for CPU flags Public API Internal driver API Public API implementation Wire protocol format Remote driver Server side dispatcher CPU selection infrastructure CPU map for models and features Set cpuCompare handler in drivers Implement CPU selection in QEMU driver Implement virsh commands configure.in | 20 + daemon/remote.c | 22 + docs/schemas/capability.rng | 46 ++- docs/schemas/domain.rng | 62 +++ include/libvirt/libvirt.h.in | 13 + include/libvirt/virterror.h | 1 + src/Makefile.am | 23 +- src/conf/capabilities.c | 31 ++- src/conf/capabilities.h | 6 + src/conf/cpu_conf.c | 366 +++++++++++++ src/conf/cpu_conf.h | 116 +++++ src/conf/domain_conf.c | 15 + src/conf/domain_conf.h | 2 + src/cpu/cpu.c | 242 +++++++++ src/cpu/cpu.h | 129 +++++ src/cpu/cpu_generic.c | 123 +++++ src/cpu/cpu_generic.h | 32 ++ src/cpu/cpu_map.c | 130 +++++ src/cpu/cpu_map.h | 41 ++ src/cpu/cpu_map.xml | 304 +++++++++++ src/cpu/cpu_x86.c | 1159 ++++++++++++++++++++++++++++++++++++++++++ src/cpu/cpu_x86.h | 31 ++ src/cpu/cpu_x86_data.h | 45 ++ src/driver.h | 5 + src/esx/esx_driver.c | 1 + src/libvirt.c | 41 ++ src/libvirt_private.syms | 19 + src/libvirt_public.syms | 5 + src/lxc/lxc_driver.c | 1 + src/openvz/openvz_driver.c | 1 + src/qemu/qemu_conf.c | 401 ++++++++++++++- src/qemu/qemu_conf.h | 7 + src/qemu/qemu_driver.c | 43 ++- src/remote/remote_driver.c | 27 + src/remote/remote_protocol.x | 12 +- src/test/test_driver.c | 1 + src/uml/uml_driver.c | 1 + src/util/virterror.c | 3 + src/vbox/vbox_tmpl.c | 1 + tools/virsh.c | 65 +++ 40 files changed, 3558 insertions(+), 35 deletions(-) create mode 100644 src/conf/cpu_conf.c create mode 100644 src/conf/cpu_conf.h create mode 100644 src/cpu/cpu.c create mode 100644 src/cpu/cpu.h create mode 100644 src/cpu/cpu_generic.c create mode 100644 src/cpu/cpu_generic.h create mode 100644 src/cpu/cpu_map.c create mode 100644 src/cpu/cpu_map.h create mode 100644 src/cpu/cpu_map.xml create mode 100644 src/cpu/cpu_x86.c create mode 100644 src/cpu/cpu_x86.h create mode 100644 src/cpu/cpu_x86_data.h

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[libvirt] [PATCH] Initialize gcrypt threading
by Daniel P. Berrange 17 Dec '09

17 Dec '09

GNUTLS uses gcrypt for its crypto functions. gcrypt requires that the app/library initializes threading before using it. We don't want to force apps using libvirt to know about gcrypt, so we make virInitialize init threading on their behalf. This location also ensures libvirtd has initialized it correctly. This initialization is required even if libvirt itself were only using one thread, since another non-libvirt library (eg GTK-VNC) could also be using gcrypt from another thread * src/libvirt.c: Register thread functions for gcrypt * configure.in: Add -lgcrypt to linker flags --- build-aux/.gitignore | 2 + configure.in | 4 ++- src/libvirt.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 58 insertions(+), 1 deletions(-) diff --git a/build-aux/.gitignore b/build-aux/.gitignore index 72e8ffc..a1b5d3b 100644 --- a/build-aux/.gitignore +++ b/build-aux/.gitignore @@ -1 +1,3 @@ * +/link-warning.h +/mktempd diff --git a/configure.in b/configure.in index 6ed2efd..c86ee97 100644 --- a/configure.in +++ b/configure.in @@ -547,7 +547,9 @@ if test "$GNUTLS_FOUND" = "no"; then test $fail = 1 && AC_MSG_ERROR([You must install the GnuTLS library in order to compile and run libvirt]) - GNUTLS_LIBS=$LIBS + dnl Not all versions of gnutls include -lgcrypt, and so we add + dnl it explicitly for the calls to gcry_control/check_version + GNUTLS_LIBS="$LIBS -lgcrypt" LIBS="$old_libs" fi diff --git a/src/libvirt.c b/src/libvirt.c index 103b331..cad33c2 100644 --- a/src/libvirt.c +++ b/src/libvirt.c @@ -22,6 +22,7 @@ #include <sys/wait.h> #endif #include <time.h> +#include <gcrypt.h> #include <libxml/parser.h> #include <libxml/xpath.h> @@ -251,6 +252,55 @@ winsock_init (void) } #endif +static int virTLSMutexInit (void **priv) +{ \ + virMutexPtr lock = NULL; + + if (VIR_ALLOC(lock) < 0) + return ENOMEM; + + if (virMutexInit(lock) < 0) { + VIR_FREE(lock); + return errno; + } + + *priv = lock; + return 0; +} + +static int virTLSMutexDestroy(void **priv) +{ + virMutexPtr lock = *priv; + virMutexDestroy(lock); + VIR_FREE(lock); + return 0; +} + +static int virTLSMutexLock(void **priv) +{ + virMutexPtr lock = *priv; + virMutexLock(lock); + return 0; +} + +static int virTLSMutexUnlock(void **priv) +{ + virMutexPtr lock = *priv; + virMutexUnlock(lock); + return 0; +} + +static struct gcry_thread_cbs virTLSThreadImpl = { + (GCRY_THREAD_OPTION_PTHREAD | (GCRY_THREAD_OPTION_VERSION << 8)), + NULL, + virTLSMutexInit, + virTLSMutexDestroy, + virTLSMutexLock, + virTLSMutexUnlock, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL +}; + + /** * virInitialize: * @@ -273,6 +323,9 @@ virInitialize(void) virRandomInitialize(time(NULL) ^ getpid())) return -1; + gcry_control(GCRYCTL_SET_THREAD_CBS, &virTLSThreadImpl); + gcry_check_version(NULL); + virLogSetFromEnv(); DEBUG0("register drivers"); -- 1.6.5.2

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[libvirt] [PATCH 0/10] Convert over to use new -device args everywhere
by Daniel P. Berrange 17 Dec '09

17 Dec '09

QEMU has introduced a new command line arg called -device for specifying the guest device config. This allows separation from the host device config. libvirt needs to use this new syntax so that we can specify static PCI addresses for devices (the old syntax did not allow this). This patch series is the quick conversion I've done so far. The most obvious thing still lacking here is new test cases. I want to wait until this series merges with the device addressing series before adding those, since one set of tests can cover both patch series. In addition the handling of disk drivers is not quite correct. We need the disk controller patches myself/Wolfgang have worked on in order to specify the disk bus/unit instead of index.

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[libvirt] Cannot start domain w/xenner emulator
by Gerry Reno 16 Dec '09

16 Dec '09

# virsh start Ubuntu-domU-x86-1 Connecting to uri: qemu:///system error: Failed to start domain Ubuntu-domU-x86-1 error: internal error unable to start guest: libvir: error : cannot execute binary /usr/bin/xenner: Permission denied # ls -l /usr/bin/xenner -rwxr-xr-x 1 root root 118936 2009-12-14 17:05 /usr/bin/xenner Sure looks executable. And there's no SELinux on the box. libvirt is 0.7.0 What the..? -Gerry

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[libvirt] ANNOUNCE: Starting a libvirt application developer guide effort
by Daniel P. Berrange 16 Dec '09

16 Dec '09

This is a quick mail to announce that we have started an effort to write a libvirt application developer guide. The guide is intended to introduce programmers to the libvirt API and its concepts and demonstrate best practice along the way. The initial focus is on the C API, but once that's matured, further info on language bindings can be added. As is common with all work done in the libvirt project, the guide is being made available under an open license, specifically the Creative Commons AttributionâShare Alike 3.0 Unported license ("CC-BY-SA") The reason for this choice is that it has become the defacto license choice for documentation under Fedora, GNOME, and content from Wikipedia, etc.[1] The application developer guide is written in DocBook and is processed using the Publican toolset to generate the HTML and PDF output. Again this choice was made because it is the same toolset used in Fedora & Red Hat docs NB, this is using Publican 1.x series of releases which is available starting in Fedora 12 or later. The build config/styling is not compatible with the older Public 0.x series from earlier Fedora. There are two new GIT repositories for this work - A repository containing the libvirt brand. This is essentially CSS and graphics required to make the docs use the same style as the libvirt website does http://libvirt.org/git/?p=libvirt-publican.git - A repository containing the application developer doc. This is the actual interesting content. http://libvirt.org/git/?p=libvirt-appdev-guide.git Assuming you have Publican >= 1.0 installed, then the first step is to build and install the libvirt brand. This involves getting a checkout of the libvirt-publican.git repo, typing 'make rpm' and then installing the RPM it generates. Once the brand is installed, then you can get a checkout of the actual docs from 'libvirt-appdev-guide.git'. The content is all under the directory en-US/ in docbook format. To generate html, from the top level directory just type 'make html', likewise pdfs with 'make pdf'. If you just type 'make' you get html and pdfs. I have put up example copies generated from current available content http://berrange.fedorapeople.org/libvirt/appdev-guide/html/ http://berrange.fedorapeople.org/libvirt/appdev-guide/pdf/ If you look at these, you'll notice of course that while there is a nice big table of contents, most of the actual content is missing. We are continuing to write content and will update it periodically. If anyone is interested in contributing content, then simply send patches against the docbook XML in the libvirt-appdev-guide.git to this list as per the normal review & commit process. Regards, Daniel [1] http://iquaid.org/2009/07/06/why-relicense-fedora-documentation-and-wiki-co… -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|

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[libvirt] [PATCH] esx_util.c: avoid NULL deref for invalid inputs
by Jim Meyering 16 Dec '09

16 Dec '09

The trouble here is that "goto failure" would run this code: failure: VIR_FREE(*datastoreName); VIR_FREE(*directoryName); VIR_FREE(*fileName); result = -1; goto cleanup; And thus if any of those 3 input variables was NULL, that deref would probably provoke a segfault. By the way, that interface should be changed, because it encourages risky behavior: int esxUtil_ParseDatastoreRelatedPath(virConnectPtr conn, const char *datastoreRelatedPath, char **datastoreName, char **directoryName, char **fileName) Note how it takes a buffer, datastoreRelatedPath, but with no length parameter. Then this function writes into the buffer with this code: if (sscanf(datastoreRelatedPath, "[%a[^]%]] %a[^\n]", datastoreName, &directoryAndFileName) != 2) { which cannot even check for buffer overrun because it doesn't know the length. You might want to add a new parameter, buf_len: int esxUtil_ParseDatastoreRelatedPath(virConnectPtr conn, const char *datastoreRelatedPath, size_t buf_len, char **datastoreName, char **directoryName, char **fileName) >From aba304e07835c123bd63f1d5d6777a898916349f Mon Sep 17 00:00:00 2001 From: Jim Meyering <meyering(a)redhat.com> Date: Tue, 15 Dec 2009 19:08:49 +0100 Subject: [PATCH] esx_util.c: avoid NULL deref for invalid inputs * src/esx/esx_util.c (esxUtil_ParseDatastoreRelatedPath): Return right away, rather than trying to clean up and dereference NULL pointers, if any input is invalid. --- src/esx/esx_util.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/src/esx/esx_util.c b/src/esx/esx_util.c index 3e53921..8703ac2 100644 --- a/src/esx/esx_util.c +++ b/src/esx/esx_util.c @@ -277,7 +277,7 @@ esxUtil_ParseDatastoreRelatedPath(virConnectPtr conn, directoryName == NULL || *directoryName != NULL || fileName == NULL || *fileName != NULL) { ESX_ERROR(conn, VIR_ERR_INTERNAL_ERROR, "Invalid argument"); - goto failure; + return -1; } /* @@ -299,7 +299,7 @@ esxUtil_ParseDatastoreRelatedPath(virConnectPtr conn, ESX_ERROR(conn, VIR_ERR_INTERNAL_ERROR, "Datastore related path '%s' doesn't have expected format " "'[<datastore>] <path>'", datastoreRelatedPath); - goto failure; + return -1; } /* Split <path> into <directory>/<file>, where <directory> is optional */ -- 1.6.6.rc2.275.g51e2d

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[libvirt] [PATCH] esx_vmx.c: don't dereference a NULL virtualDev
by Jim Meyering 15 Dec '09

15 Dec '09

The offending code starts here: int esxVMX_ParseSCSIController(virConnectPtr conn, virConfPtr conf, int controller, int *present, char **virtualDev) { char present_name[32]; char virtualDev_name[32]; if (virtualDev == NULL || *virtualDev != NULL) { ESX_ERROR(conn, VIR_ERR_INTERNAL_ERROR, "Invalid argument"); goto failure; } If the virtualDev parameter is NULL, then we'd issue the diagnostic and take the "goto", and (below), dereference NULL. >From 79283ba1d667534175d4c48079e6b500feba6480 Mon Sep 17 00:00:00 2001 From: Jim Meyering <meyering(a)redhat.com> Date: Tue, 15 Dec 2009 16:07:10 +0100 Subject: [PATCH] esx_vmx.c: don't dereference NULL for a NULL virtualDev * src/esx/esx_vmx.c (esxVMX_ParseSCSIController): Don't deref "virtualDev" when it is NULL. --- src/esx/esx_vmx.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/src/esx/esx_vmx.c b/src/esx/esx_vmx.c index f5b4544..404617e 100644 --- a/src/esx/esx_vmx.c +++ b/src/esx/esx_vmx.c @@ -1204,7 +1204,8 @@ esxVMX_ParseSCSIController(virConnectPtr conn, virConfPtr conf, int controller, return 0; failure: - VIR_FREE(*virtualDev); + if (virtualDev) + VIR_FREE(*virtualDev); return -1; } -- 1.6.6.rc2.275.g51e2d

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