January 2011 - Devel - libvirt List Archives

[libvirt] build failure on ubuntu
by Eric Blake 14 Jan '11

14 Jan '11

I haven't looked into this closely yet, but Daniel's security refactoring broke the Ubuntu 'make check' build when apparmor is enabled: CC secaatest.o secaatest.c: In function 'main': secaatest.c:18: error: implicit declaration of function 'virSecurityDriverStartup' [-Wimplicit-function-declaration] -- Eric Blake eblake(a)redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org

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[libvirt] [PATCH 0/4] Add HAP to domain features
by Jim Fehlig 14 Jan '11

14 Jan '11

Hardware features such as Extended Page Table and Nested Page Table augment hypervisor software techniques such as shadow page table. Adding HAP (hardware assisted paging) to the virDomainFeature enumeration allows users to select between hardware and software memory management mechanisms for their guests. I've seen reports [1] of users asking for this capability in the past. Patch 3 is an attempt to advertise the feature in hvm guest capabilities for the Xen hypervisor. I have not found a way to discover the presence of HAP support through the xen tools. Instead, the feature is only advertised on Xen >= 3.3, which sadly won't accommodate distro backports to older Xen versions. Thanks for your comments, Jim [1] http://www.mail-archive.com/fedora-xen@redhat.com/msg02680.html Jim Fehlig (4): Add HAP to virDomainFeature enum Add support for HAP feature to xen drivers Add HAP to xen hypervisor capabilities Document HAP domain feature docs/formatdomain.html.in | 5 +++++ docs/schemas/domain.rng | 7 ++++++- src/conf/domain_conf.c | 3 ++- src/conf/domain_conf.h | 1 + src/xen/xen_hypervisor.c | 10 ++++++++++ src/xen/xend_internal.c | 4 ++++ src/xen/xm_internal.c | 8 ++++++++ src/xenapi/xenapi_driver.c | 2 ++ src/xenapi/xenapi_utils.c | 2 ++ 9 files changed, 40 insertions(+), 2 deletions(-) -- 1.7.3.1

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[libvirt] virsh setmem and setmaxmem: which XML do they match?
by Justin Clift 14 Jan '11

14 Jan '11

Hi all, Updating the man pages for the virsh setmem and setmaxmem commands at the moment. These two commands only run on active guest domains. So, as a helpful pointer on how to make the change with an inactive domain, I'm going to mention what the equivalent XML tag is for use with virsh edit. Like this: Note, this command only works on active guest domains. To change the memory allocation for an inactive guest domain, use the virsh B<edit> command to update the XML <memory> element. I'm just not sure which XML element the setmem and setmaxmem commands map to. Does "setmaxmem" map to <memory>, and "setmem" map to <currentMemory>? The description in our XML format domain doc is less than clear. :/ Regards and best wishes, Justin Clift

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[libvirt] [PATCH] util: add missing string->integer conversion functions
by Eric Blake 14 Jan '11

14 Jan '11

It was awkward having only int conversion in the virStrToLong family, but only long conversion in the virXPath family. Make both families support both types. * src/util/util.h (virStrToLong_l, virStrToLong_ul): New prototypes. * src/util/xml.h (virXPathInt, virXPathUInt): Likewise. * src/util/util.c (virStrToLong_l, virStrToLong_ul): New functions. * src/util/xml.c (virXPathInt, virXPathUInt): Likewise. * src/libvirt_private.syms (util.h, xml.h): Export them. --- src/libvirt_private.syms | 4 +++ src/util/util.c | 40 +++++++++++++++++++++++++++++- src/util/util.h | 8 ++++++ src/util/xml.c | 60 +++++++++++++++++++++++++++++++++++++++++++++- src/util/xml.h | 12 +++++++-- 5 files changed, 119 insertions(+), 5 deletions(-) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index a166bd9..d95ef31 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -886,8 +886,10 @@ virSetUIDGID; virSkipSpaces; virStrToDouble; virStrToLong_i; +virStrToLong_l; virStrToLong_ll; virStrToLong_ui; +virStrToLong_ul; virStrToLong_ull; virStrcpy; virStrncpy; @@ -926,6 +928,7 @@ virStrerror; # xml.h virXMLPropString; virXPathBoolean; +virXPathInt; virXPathLong; virXPathLongHex; virXPathLongLong; @@ -934,6 +937,7 @@ virXPathNodeSet; virXPathNumber; virXPathString; virXPathStringLimit; +virXPathUInt; virXPathULong; virXPathULongHex; virXPathULongLong; diff --git a/src/util/util.c b/src/util/util.c index 18b38f4..f412a83 100644 --- a/src/util/util.c +++ b/src/util/util.c @@ -2081,7 +2081,45 @@ virStrToLong_ui(char const *s, char **end_ptr, int base, unsigned int *result) return 0; } -/* Just like virStrToLong_i, above, but produce an "long long" value. */ +/* Just like virStrToLong_i, above, but produce a "long" value. */ +int +virStrToLong_l(char const *s, char **end_ptr, int base, long *result) +{ + long int val; + char *p; + int err; + + errno = 0; + val = strtol(s, &p, base); + err = (errno || (!end_ptr && *p) || p == s); + if (end_ptr) + *end_ptr = p; + if (err) + return -1; + *result = val; + return 0; +} + +/* Just like virStrToLong_i, above, but produce an "unsigned long" value. */ +int +virStrToLong_ul(char const *s, char **end_ptr, int base, unsigned long *result) +{ + unsigned long int val; + char *p; + int err; + + errno = 0; + val = strtoul(s, &p, base); + err = (errno || (!end_ptr && *p) || p == s); + if (end_ptr) + *end_ptr = p; + if (err) + return -1; + *result = val; + return 0; +} + +/* Just like virStrToLong_i, above, but produce a "long long" value. */ int virStrToLong_ll(char const *s, char **end_ptr, int base, long long *result) { diff --git a/src/util/util.h b/src/util/util.h index 932db03..8373038 100644 --- a/src/util/util.h +++ b/src/util/util.h @@ -188,6 +188,14 @@ int virStrToLong_ui(char const *s, char **end_ptr, int base, unsigned int *result); +int virStrToLong_l(char const *s, + char **end_ptr, + int base, + long *result); +int virStrToLong_ul(char const *s, + char **end_ptr, + int base, + unsigned long *result); int virStrToLong_ll(char const *s, char **end_ptr, int base, diff --git a/src/util/xml.c b/src/util/xml.c index e2c2c6c..de5e9de 100644 --- a/src/util/xml.c +++ b/src/util/xml.c @@ -1,7 +1,7 @@ /* * xml.c: XML based interfaces for the libvir library * - * Copyright (C) 2005, 2007-2010 Red Hat, Inc. + * Copyright (C) 2005, 2007-2011 Red Hat, Inc. * * See COPYING.LIB for the License of this software * @@ -195,6 +195,35 @@ virXPathLongBase(const char *xpath, } /** + * virXPathInt: + * @xpath: the XPath string to evaluate + * @ctxt: an XPath context + * @value: the returned int value + * + * Convenience function to evaluate an XPath number + * + * Returns 0 in case of success in which case @value is set, + * or -1 if the XPath evaluation failed or -2 if the + * value doesn't have an int format. + */ +int +virXPathInt(const char *xpath, + xmlXPathContextPtr ctxt, + int *value) +{ + long tmp; + int ret; + + ret = virXPathLongBase(xpath, ctxt, 10, &tmp); + if (ret < 0) + return ret; + if ((int) tmp != tmp) + return -2; + *value = tmp; + return 0; +} + +/** * virXPathLong: * @xpath: the XPath string to evaluate * @ctxt: an XPath context @@ -279,6 +308,35 @@ virXPathULongBase(const char *xpath, } /** + * virXPathUInt: + * @xpath: the XPath string to evaluate + * @ctxt: an XPath context + * @value: the returned int value + * + * Convenience function to evaluate an XPath number + * + * Returns 0 in case of success in which case @value is set, + * or -1 if the XPath evaluation failed or -2 if the + * value doesn't have an int format. + */ +int +virXPathUInt(const char *xpath, + xmlXPathContextPtr ctxt, + unsigned int *value) +{ + unsigned long tmp; + int ret; + + ret = virXPathULongBase(xpath, ctxt, 10, &tmp); + if (ret < 0) + return ret; + if ((unsigned int) tmp != tmp) + return -2; + *value = tmp; + return 0; +} + +/** * virXPathULong: * @xpath: the XPath string to evaluate * @ctxt: an XPath context diff --git a/src/util/xml.h b/src/util/xml.h index b1da741..b342e83 100644 --- a/src/util/xml.h +++ b/src/util/xml.h @@ -21,19 +21,25 @@ char * virXPathStringLimit(const char *xpath, int virXPathNumber(const char *xpath, xmlXPathContextPtr ctxt, double *value); +int virXPathInt(const char *xpath, + xmlXPathContextPtr ctxt, + int *value); +int virXPathUInt(const char *xpath, + xmlXPathContextPtr ctxt, + unsigned int *value); int virXPathLong(const char *xpath, xmlXPathContextPtr ctxt, long *value); -int virXPathULong(const char *xpath, +int virXPathULong(const char *xpath, xmlXPathContextPtr ctxt, unsigned long *value); int virXPathULongLong(const char *xpath, xmlXPathContextPtr ctxt, unsigned long long *value); -int virXPathLongLong(const char *xpath, +int virXPathLongLong(const char *xpath, xmlXPathContextPtr ctxt, long long *value); -int virXPathLongHex (const char *xpath, +int virXPathLongHex(const char *xpath, xmlXPathContextPtr ctxt, long *value); int virXPathULongHex(const char *xpath, -- 1.7.3.4

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[libvirt] virsh setmaxmem granularity for vSphere/ESX?
by Justin Clift 14 Jan '11

14 Jan '11

Hi Matthias, Do you know if the virsh "setmaxmem" has the same MB granularity as "setmem" (on vSphere/ESX)? Regards and best wishes, Justin Clift

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[libvirt] [PATCH] docs: clarify that virsh setvcpus and setmem only work on active domains
by Justin Clift 13 Jan '11

13 Jan '11

Addresses BZ # 622534: https://bugzilla.redhat.com/show_bug.cgi?id=622534 --- tools/virsh.pod | 28 ++++++++++++++++++---------- 1 files changed, 18 insertions(+), 10 deletions(-) diff --git a/tools/virsh.pod b/tools/virsh.pod index 0e03d68..b4c6ff7 100644 --- a/tools/virsh.pod +++ b/tools/virsh.pod @@ -568,13 +568,16 @@ XEN_CREDIT scheduler and are now I<DEPRECATED>. =item B<setmem> I<domain-id> B<kilobytes> -Change the current memory allocation in the guest domain. This should take -effect immediately. The memory limit is specified in -kilobytes. +Change the current memory allocation in an B<active> guest domain. This +should take effect immediately. The memory limit is specified in kilobytes. For Xen, you can only adjust the memory of a running domain if the domain is paravirtualized or running the PV balloon driver. +B<Note>, this command only works on active guest domains. To change the +number of virtual CPUs in a inactive guest domain, use the virsh B<edit> +command to update the XML <memory> element. + =item B<setmaxmem> I<domain-id> B<kilobytes> Change the maximum memory allocation limit in the guest domain. This should @@ -593,24 +596,29 @@ QEMU/KVM supports I<--hard-limit>, I<--soft-limit>, and I<--swap-hard-limit>. =item B<setvcpus> I<domain-id> I<count> optional I<--maximum> I<--config> I<--live> -Change the number of virtual CPUs active in the guest domain. Note that -I<count> may be limited by host, hypervisor or limit coming from the -original description of domain. +Change the number of virtual CPUs active in an B<active> guest domain. + +The I<count> value may be limited by host, hypervisor or limit coming from +the original description of the guest domain. For Xen, you can only adjust the virtual CPUs of a running domain if the domain is paravirtualized. If I<--config> is specified, the change will only affect the next boot of a domain. If I<--live> is specified, the domain must be -running, and the change takes place immediately. Both flags may be -specified, if supported by the hypervisor. If neither flag is given, -then I<--live> is implied and it is up to the hypervisor whether -I<--config> is also implied. +running, and the change takes place immediately. Both I<--config> and +I<--live> flags may be specified, if supported by the hypervisor. If +neither flag is given, then I<--live> is implied and it is up to the +hypervisor whether I<--config> is also implied. If I<--maximum> is specified, then you must use I<--config> and avoid I<--live>; this flag controls the maximum limit of vcpus that can be hot-plugged the next time the domain is booted. +B<Note>, this command only works on active guest domains. To change the +number of virtual CPUs in a inactive guest domain, use the virsh B<edit> +command to update the XML <vcpu> element. + =item B<shutdown> I<domain-id> Gracefully shuts down a domain. This coordinates with the domain OS -- 1.7.3.2

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[libvirt] esx driver: XML format for guest OS type/variant
by Jake Xu 13 Jan '11

13 Jan '11

Hi, I am trying to create a VM using the Python bindings of Libvirt. I can successfully create VM from a XML template, but I can't find any way to define the guest OS type/variant like CentOS 5.5 64bit for my VM. The native format converted from XML is always guestOS="other-64" - which doesn't tell us much about the guest operating system. I have looked at the C libvirt source code a bit, and it seems like libvirt does not support defining guest os type using XML description yet. Is there any way I can set the guest OS type for my VM? Thanks, Jake

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[libvirt] [PATCH 0/7] security: Allow disabling security per VM
by Cole Robinson 13 Jan '11

13 Jan '11

Enabling a security driver in qemu.conf is currently all or nothing. The option to disable security on a per VM basis can be a useful debugging tool or work around for frustrated users. Patches 1-3 and 5-6 are prep and cleanup work. Patch 4 fixes an easily triggerable segfault when defining a domain in qemu. Patch 7 is the actual feature. Cole Robinson (7): tests: Add qemuxml2xml tests for <seclabel> handling security: Use virDomainSeclabelDefClear security: Add virSecurityIsSpecifiedDriver qemu: Fix segfault if defining a domain without <seclabel> domain: Handle seclabel model with an enum domain: Always validate seclabel model security: Allow disabling security on a per VM basis cfg.mk | 1 + docs/schemas/domain.rng | 13 ++- src/conf/domain_conf.c | 69 ++++++++++----- src/conf/domain_conf.h | 15 +++- src/libvirt_private.syms | 2 +- src/qemu/qemu_driver.c | 4 +- src/security/security_apparmor.c | 31 ++----- src/security/security_driver.c | 25 ++++++ src/security/security_driver.h | 3 + src/security/security_manager.c | 90 +++++++++++++------- src/security/security_selinux.c | 50 +++--------- tests/domainschematest | 2 +- .../qemuxml2xml-balloon-device-auto-out.xml | 25 ++++++ .../qemuxml2xml-channel-virtio-auto-out.xml | 54 ++++++++++++ .../qemuxml2xml-console-compat-auto-out.xml | 31 +++++++ .../qemuxml2xml-console-virtio-out.xml | 29 ++++++ .../qemuxml2xml-disk-scsi-device-auto-out.xml | 31 +++++++ .../qemuxml2xml-seclabel-dynamic-in.xml | 24 +++++ .../qemuxml2xml-seclabel-dynamic-out.xml | 21 +++++ .../qemuxml2xml-seclabel-model-none-in.xml | 21 +++++ .../qemuxml2xml-seclabel-model-none-out.xml | 21 +++++ .../qemuxml2xml-seclabel-static-in.xml | 24 +++++ .../qemuxml2xml-seclabel-static-out.xml | 23 +++++ .../qemuxml2xmlout-balloon-device-auto.xml | 25 ------ .../qemuxml2xmlout-channel-virtio-auto.xml | 54 ------------ .../qemuxml2xmlout-console-compat-auto.xml | 31 ------- .../qemuxml2xmlout-console-virtio.xml | 29 ------ .../qemuxml2xmlout-disk-scsi-device-auto.xml | 31 ------- tests/qemuxml2xmltest.c | 26 ++++-- 29 files changed, 501 insertions(+), 304 deletions(-) create mode 100644 tests/qemuxml2xmldata/qemuxml2xml-balloon-device-auto-out.xml create mode 100644 tests/qemuxml2xmldata/qemuxml2xml-channel-virtio-auto-out.xml create mode 100644 tests/qemuxml2xmldata/qemuxml2xml-console-compat-auto-out.xml create mode 100644 tests/qemuxml2xmldata/qemuxml2xml-console-virtio-out.xml create mode 100644 tests/qemuxml2xmldata/qemuxml2xml-disk-scsi-device-auto-out.xml create mode 100644 tests/qemuxml2xmldata/qemuxml2xml-seclabel-dynamic-in.xml create mode 100644 tests/qemuxml2xmldata/qemuxml2xml-seclabel-dynamic-out.xml create mode 100644 tests/qemuxml2xmldata/qemuxml2xml-seclabel-model-none-in.xml create mode 100644 tests/qemuxml2xmldata/qemuxml2xml-seclabel-model-none-out.xml create mode 100644 tests/qemuxml2xmldata/qemuxml2xml-seclabel-static-in.xml create mode 100644 tests/qemuxml2xmldata/qemuxml2xml-seclabel-static-out.xml delete mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-balloon-device-auto.xml delete mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-channel-virtio-auto.xml delete mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-console-compat-auto.xml delete mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-console-virtio.xml delete mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-disk-scsi-device-auto.xml -- 1.7.3.2

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[libvirt] [PATCH] Fix crash in SELinuxSecurityVerify
by Laine Stump 13 Jan '11

13 Jan '11

When attempting to edit a domain, libvirtd segfaulted in SELinuxSecurityVerify() on this line: if (!STREQ(virSecurityManagerGetModel(mgr), secdef->model)) { because secdef->model was NULL. Although I'm too tired to investigate in depth, I noticed that all the other functions in that file that do the same STREQ() will first check that def->seclabel.label is non-NULL, but this function doesn't. I also noticed that label *is* NULL in my case, so I tried adding that check to SELinuxSecurityVerify(), and the crash goes away. I have no idea if this is the correct fix, but it allowed me to continue my testing of a new (unrelated) feature. --- src/security/security_selinux.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/src/security/security_selinux.c b/src/security/security_selinux.c index d06afde..b97ca4c 100644 --- a/src/security/security_selinux.c +++ b/src/security/security_selinux.c @@ -871,6 +871,10 @@ SELinuxSecurityVerify(virSecurityManagerPtr mgr ATTRIBUTE_UNUSED, virDomainDefPtr def) { const virSecurityLabelDefPtr secdef = &def->seclabel; + + if (def->seclabel.label == NULL) + return 0; + if (!STREQ(virSecurityManagerGetModel(mgr), secdef->model)) { virSecurityReportError(VIR_ERR_INTERNAL_ERROR, _("security label driver mismatch: " -- 1.7.3.4

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[libvirt] [PATCH 0/6 v2] events: Add helpers for driver dispatching
by Cole Robinson 13 Jan '11

13 Jan '11

I noticed that there is quite a bit of code duplication among the drivers that support domain events. This patch series is an attempt to consolidate the shared logic. v2: 2 patches were applied Addressed Eric's comments: NONNULL tagging Use bool for isDispatching Move libvirt_private.syms earlier Add NULL check in StateFree Cole Robinson (6): domain_event: Add virDomainEventState structure domain_event: Add common domain event queue/flush helpers qemu: Use virDomainEventState helpers lxc: Use virDomainEventState helpers test: Use virDomainEventState helpers remote: Use virDomainEventState helpers cfg.mk | 1 + src/conf/domain_event.c | 166 ++++++++++++++++++++++++++++++++++++++----- src/conf/domain_event.h | 69 +++++++++++++++---- src/libvirt_private.syms | 6 ++ src/lxc/lxc_conf.h | 6 +-- src/lxc/lxc_driver.c | 76 ++++++-------------- src/qemu/qemu_conf.h | 6 +-- src/qemu/qemu_driver.c | 80 +++++++-------------- src/remote/remote_driver.c | 162 ++++++++++++++++-------------------------- src/test/test_driver.c | 104 ++++++++------------------- 10 files changed, 353 insertions(+), 323 deletions(-) -- 1.7.3.3

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