August 2014 - Devel - libvirt List Archives

[libvirt] [PATCH V3 00/24] xen_xm parsing code refactor
by David Kiarie 07 Aug '14

07 Aug '14

Kiarie Kahurani (24): src/xenxs:Refactor code parsing memory config src/xenxs:Refactor code parsing virtual time config src/xenxs:Refactor code parsing event actions src/xenxs:Refactor code parsing PCI config src/xenxs:Refactor code parsing CPU features src/xenxs:Refactor code parsing xm disk config src/xenxs:Refactor code parsing Vfb config src/xenxs:Refactor code parsing Char devices config src/xenxs:Refactor code parsing Vif config src/xenxs:Refactor code parsing emulated hardware config src/xenxs:Refactor code parsing general config src/xenxs:Refactor code parsing OS config src/xenxs:Export code for reuse src/xenxs:Refactor code formating general VM config src/xenxs:Refactor code formating memory config src/xenxs:Refactor code formating virtual time config src/xenxs:Refactor code formating event actions config src/xenxs:Refactor code formating Char devices config src/xenxs:Refactor code formating xm disk config src/xenxs:Refactor code formating CPU features config src/xenxs:Refactor code formating OS config src/xenxs:Refactor code formating Vfb config src/xenxs:Refactor code formating emulated devices config src/xenxs:Export code src/xenxs/xen_xm.c | 2217 +++++++++++--------- src/xenxs/xen_xm.h | 4 + tests/xmconfigdata/test-escape-paths.cfg | 12 +- tests/xmconfigdata/test-fullvirt-force-hpet.cfg | 10 +- tests/xmconfigdata/test-fullvirt-force-nohpet.cfg | 10 +- tests/xmconfigdata/test-fullvirt-localtime.cfg | 10 +- tests/xmconfigdata/test-fullvirt-net-ioemu.cfg | 10 +- tests/xmconfigdata/test-fullvirt-net-netfront.cfg | 10 +- tests/xmconfigdata/test-fullvirt-new-cdrom.cfg | 10 +- tests/xmconfigdata/test-fullvirt-old-cdrom.cfg | 10 +- tests/xmconfigdata/test-fullvirt-parallel-tcp.cfg | 10 +- .../test-fullvirt-serial-dev-2-ports.cfg | 10 +- .../test-fullvirt-serial-dev-2nd-port.cfg | 10 +- tests/xmconfigdata/test-fullvirt-serial-file.cfg | 10 +- tests/xmconfigdata/test-fullvirt-serial-null.cfg | 10 +- tests/xmconfigdata/test-fullvirt-serial-pipe.cfg | 10 +- tests/xmconfigdata/test-fullvirt-serial-pty.cfg | 10 +- tests/xmconfigdata/test-fullvirt-serial-stdio.cfg | 10 +- .../test-fullvirt-serial-tcp-telnet.cfg | 10 +- tests/xmconfigdata/test-fullvirt-serial-tcp.cfg | 10 +- tests/xmconfigdata/test-fullvirt-serial-udp.cfg | 10 +- tests/xmconfigdata/test-fullvirt-serial-unix.cfg | 10 +- tests/xmconfigdata/test-fullvirt-sound.cfg | 12 +- tests/xmconfigdata/test-fullvirt-usbmouse.cfg | 10 +- tests/xmconfigdata/test-fullvirt-usbtablet.cfg | 10 +- tests/xmconfigdata/test-fullvirt-utc.cfg | 10 +- tests/xmconfigdata/test-no-source-cdrom.cfg | 10 +- tests/xmconfigdata/test-paravirt-net-e1000.cfg | 2 +- tests/xmconfigdata/test-paravirt-net-vifname.cfg | 2 +- .../test-paravirt-new-pvfb-vncdisplay.cfg | 2 +- tests/xmconfigdata/test-paravirt-new-pvfb.cfg | 2 +- .../test-paravirt-old-pvfb-vncdisplay.cfg | 2 +- tests/xmconfigdata/test-paravirt-old-pvfb.cfg | 2 +- tests/xmconfigdata/test-paravirt-vcpu.cfg | 2 +- tests/xmconfigdata/test-pci-devs.cfg | 10 +- 35 files changed, 1416 insertions(+), 1083 deletions(-) V3 of series refactoring xen_xm.c code for reuse in the xen-xl parser. Changes since V2 -Formating fixes -reused Vif formating and parsing code -- 1.8.4.5

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[libvirt] valgrind report on active commit
by Eric Blake 07 Aug '14

07 Aug '14

I'm still investigating, but posting this trace now in case someone else spots the bug. I created a chain three deep (base.img <- mid.img <- top.img), then ran blockcopy --finish, blockcommit --active --shallow --pivot, and another blockcommit --active --shallow --pivot. The last attempt to pivot exposed the bad memory use: ==25612== Invalid read of size 4 ==25612== at 0x50E7C90: virStorageSourceGetActualType (virstoragefile.c:1948) ==25612== by 0x209C0B18: qemuDomainDetermineDiskChain (qemu_domain.c:2473) ==25612== by 0x209D7F6A: qemuProcessHandleBlockJob (qemu_process.c:1087) ==25612== by 0x209F40C9: qemuMonitorEmitBlockJob (qemu_monitor.c:1357) ==25612== by 0x20A06B7F: qemuMonitorJSONHandleBlockJobImpl (qemu_monitor_json.c:922) ==25612== by 0x20A06D18: qemuMonitorJSONHandleBlockJobCompleted (qemu_monitor_json.c:969) ==25612== by 0x20A048CD: qemuMonitorJSONIOProcessEvent (qemu_monitor_json.c:166) ==25612== by 0x20A04A73: qemuMonitorJSONIOProcessLine (qemu_monitor_json.c:195) ==25612== by 0x20A04CDB: qemuMonitorJSONIOProcess (qemu_monitor_json.c:237) ==25612== by 0x209F1047: qemuMonitorIOProcess (qemu_monitor.c:402) ==25612== by 0x209F1AB1: qemuMonitorIO (qemu_monitor.c:651) ==25612== by 0x50A73C0: virEventPollDispatchHandles (vireventpoll.c:510) ==25612== Address 0xe4b5610 is 0 bytes inside a block of size 200 free'd ==25612== at 0x4A07577: free (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==25612== by 0x50839E9: virFree (viralloc.c:582) ==25612== by 0x50E7E51: virStorageSourceFree (virstoragefile.c:2015) ==25612== by 0x209D7EFF: qemuProcessHandleBlockJob (qemu_process.c:1073) ==25612== by 0x209F40C9: qemuMonitorEmitBlockJob (qemu_monitor.c:1357) ==25612== by 0x20A06B7F: qemuMonitorJSONHandleBlockJobImpl (qemu_monitor_json.c:922) ==25612== by 0x20A06D18: qemuMonitorJSONHandleBlockJobCompleted (qemu_monitor_json.c:969) ==25612== by 0x20A048CD: qemuMonitorJSONIOProcessEvent (qemu_monitor_json.c:166) ==25612== by 0x20A04A73: qemuMonitorJSONIOProcessLine (qemu_monitor_json.c:195) ==25612== by 0x20A04CDB: qemuMonitorJSONIOProcess (qemu_monitor_json.c:237) ==25612== by 0x209F1047: qemuMonitorIOProcess (qemu_monitor.c:402) ==25612== by 0x209F1AB1: qemuMonitorIO (qemu_monitor.c:651) -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org

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[libvirt] [PATCH v5 0/4] fix blockcopy across libvirtd restart, turn on active blockcommit
by Eric Blake 07 Aug '14

07 Aug '14

v4 was here: https://www.redhat.com/archives/libvir-list/2014-June/msg01095.html Since then: I _finally_ implemented persistent domain updates to match live changes, by reimplementing how <mirror> is tracked in XML to be more robust to libvirtd restarts. In particular, it fixes a bug in v4 that Adam Litke pointed out where a pivot commit would emit a ready event for 'active commit' but then a completed event for plain 'commit'. Patches 1 and 2 are completely local to blockcopy, and fix a long-standing bug where it is not robust to libvirtd restarts (similar to the bug fixed in 60e4944). They are pre-requisite to turning on active commit. Patches 3 and 4 are borderline on whether it is a new feature or a bug fix. But consider that commit 47549d5 turned on qemu feature probing with the intent of getting this in 1.2.7, and we already missed getting active commit into 1.2.6. As it is, patch 4 is very similar to the already-acked counterpart of v4. Therefore, even though I missed rc1, I'm arguing that this whole series should be included in rc2 in time for 1.2.7. Not done yet, but that I'd also like to have in the release if I can swing it: the new virConnectGetDomainCapabilities API needs to expose features on whether active commit will work. Also, I'd like to fix libvirtd restarts to inspect all existing <mirror> tags and see if the job completed while libvirtd was offline (that is, when we miss an event, we should still start up in the correct state when reconnecting to qemu). Eric Blake (4): blockcopy: add more XML for state tracking blockjob: properly track blockcopy xml changes on disk blockcommit: track job type in xml blockcommit: turn on active commit docs/formatdomain.html.in | 23 ++- docs/schemas/domaincommon.rng | 19 ++- src/conf/domain_conf.c | 56 ++++++- src/conf/domain_conf.h | 14 +- src/qemu/qemu_driver.c | 167 ++++++++++++++------- src/qemu/qemu_process.c | 92 ++++++++++-- .../qemuxml2argv-disk-active-commit.xml | 37 +++++ .../qemuxml2argvdata/qemuxml2argv-disk-mirror.xml | 8 +- .../qemuxml2xmlout-disk-mirror-old.xml | 4 +- tests/qemuxml2xmltest.c | 1 + 10 files changed, 336 insertions(+), 85 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-active-commit.xml -- 1.9.3

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[libvirt] Error
by ahmad jan 07 Aug '14

07 Aug '14

I want to configure Libvirt-1.2.7 on ubuntu and found the following Error "Could not find linxml2 anywhere" guide please

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[libvirt] libvirt external disk-only snapshot will pause the VM?
by Yuanzhen Gu 07 Aug '14

07 Aug '14

Hello folks, If I give command to take external disk-only live snapshot, such as # virsh snapshot-create-as vm1 snapshot_vm1 --disk-only will the guest OS be paused or suspend while the snapshot being taken? Thanks very much! Best, Yuanzhen

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[libvirt] [PATCH] Node Devices: Fix nodedev-list for fc_host & vports.
by Prerna Saxena 07 Aug '14

07 Aug '14

In a system with Fiber Channel Host Adapters, a query to list all Fibre Channel HBAs OR Vports currently returns empty list: $ virsh nodedev-list --cap fc_host $ Libvirt correctly discovers properties for all HBAs. However, the reporting fails because of incorrect flag comparison while filtering these types. This is fixed by removing references to 'VIR_CONNECT_LIST_NODE_DEVICES_CAP_*' for comparison and replacing those with 'VIR_NODE_DEV_CAP_*' Signed-off-by: Prerna Saxena <prerna(a)linux.vnet.ibm.com> --- src/conf/node_device_conf.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/conf/node_device_conf.c b/src/conf/node_device_conf.c index 96524a6..025d08c 100644 --- a/src/conf/node_device_conf.c +++ b/src/conf/node_device_conf.c @@ -1732,12 +1732,12 @@ virNodeDeviceCapMatch(virNodeDeviceObjPtr devobj, return true; if (cap->type == VIR_NODE_DEV_CAP_SCSI_HOST) { - if (type == VIR_CONNECT_LIST_NODE_DEVICES_CAP_FC_HOST && + if (type == VIR_NODE_DEV_CAP_FC_HOST && (cap->data.scsi_host.flags & VIR_NODE_DEV_CAP_FLAG_HBA_FC_HOST)) return true; - if (type == VIR_CONNECT_LIST_NODE_DEVICES_CAP_VPORTS && + if (type == VIR_NODE_DEV_CAP_VPORTS && (cap->data.scsi_host.flags & VIR_NODE_DEV_CAP_FLAG_HBA_VPORT_OPS)) return true; -- 1.9.3 -- Prerna Saxena Linux Technology Centre, IBM Systems and Technology Lab, Bangalore, India

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[libvirt] [PATCH] snapshot: conf: Enforce absolute paths on disk and memory images
by Peter Krempa 07 Aug '14

07 Aug '14

RNG schema as well as the qemu driver requires absolute paths for memory and disk snapshot image files but the XML parser was not enforcing it. Add checks to avoid problems in qemu where the configuration it creates is invalid. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1126329 --- src/conf/snapshot_conf.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/src/conf/snapshot_conf.c b/src/conf/snapshot_conf.c index 240ca90..c53a66b 100644 --- a/src/conf/snapshot_conf.c +++ b/src/conf/snapshot_conf.c @@ -177,6 +177,16 @@ virDomainSnapshotDiskDefParseXML(xmlNodePtr node, } } + /* validate that the passed path is absolute */ + if (virStorageSourceIsLocalStorage(def->src) && + def->src->path && + def->src->path[0] != '/') { + virReportError(VIR_ERR_XML_ERROR, + _("disk snapshot image path '%s' must be absolute"), + def->src->path); + goto cleanup; + } + if (!def->snapshot && (def->src->path || def->src->format)) def->snapshot = VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL; @@ -327,6 +337,14 @@ virDomainSnapshotDefParse(xmlXPathContextPtr ctxt, def->file = memoryFile; memoryFile = NULL; + /* verify that memory path is absolute */ + if (def->file && def->file[0] != '/') { + virReportError(VIR_ERR_XML_ERROR, + _("memory snapshot file path (%s) must be absolute"), + def->file); + goto cleanup; + } + if ((n = virXPathNodeSet("./disks/*", ctxt, &nodes)) < 0) goto cleanup; if (flags & VIR_DOMAIN_SNAPSHOT_PARSE_DISKS) { -- 2.0.2

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[libvirt] [PATCH] qemu: Make virFileFindHugeTLBFS fault tolerant
by Michal Privoznik 07 Aug '14

07 Aug '14

Since commit be0782e1 we are parsing /proc/meminfo to find out the default huge page size. However, if the host we are running at does not support any huge pages (e.g. CONFIG_HUGETLB_PAGE is turned off), we will not successfully parse the meminfo file and hence the whole qemu driver init process fails. Moreover, the default huge page size is needed if and only if there's at least one hugetlbfs mount point. So the fix consists of moving the virFileGetDefaultHugepageSize function call after the first hugetlbfs mount point is found. With this fix, we fail to start with one or more hugetlbfs mounts and malformed meminfo file, but that's expected (how can one mount hugetlbfs without kernel supporting huge pages?). Workaround in that case is to umount all the hugetlbfs mounts. Reported-by: Jim Fehlig <jfehlig(a)suse.com> Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com> --- src/util/virfile.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/src/util/virfile.c b/src/util/virfile.c index 9863fd0..f9efc65 100644 --- a/src/util/virfile.c +++ b/src/util/virfile.c @@ -2990,10 +2990,7 @@ virFileFindHugeTLBFS(virHugeTLBFSPtr *ret_fs, char mntbuf[1024]; virHugeTLBFSPtr fs = NULL; size_t nfs = 0; - unsigned long long default_hugepagesz; - - if (virFileGetDefaultHugepageSize(&default_hugepagesz) < 0) - goto cleanup; + unsigned long long default_hugepagesz = 0; if (!(f = setmntent(PROC_MOUNTS, "r"))) { virReportSystemError(errno, @@ -3019,6 +3016,10 @@ virFileFindHugeTLBFS(virHugeTLBFSPtr *ret_fs, if (virFileGetHugepageSize(tmp->mnt_dir, &tmp->size) < 0) goto cleanup; + if (!default_hugepagesz && + virFileGetDefaultHugepageSize(&default_hugepagesz) < 0) + goto cleanup; + tmp->deflt = tmp->size == default_hugepagesz; } -- 1.8.5.5

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[libvirt] handle different version of QEMU
by Matthias Gatto 06 Aug '14

06 Aug '14

Hello, I'm implementing the "new" QEMU option of block_set_io_throttle(@bps_max, @bps_rd_max...), but i have a problem: The old version of QEMU(before 1.7) does not handle it, so I'd like to know what function should i use to know the version of QEMU, and what's the proper way to handle this problem ?

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[libvirt] [python PATCH] Bump version to 1.2.8 for new dev cycle
by Eric Blake 06 Aug '14

06 Aug '14

Signed-off-by: Eric Blake <eblake(a)redhat.com> --- Pushing under the trivial rule. setup.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/setup.py b/setup.py index 334d7b2..f5c6542 100755 --- a/setup.py +++ b/setup.py @@ -309,7 +309,7 @@ class my_clean(clean): _c_modules, _py_modules = get_module_lists() setup(name = 'libvirt-python', - version = '1.2.7', + version = '1.2.8', url = 'http://www.libvirt.org', maintainer = 'Libvirt Maintainers', maintainer_email = 'libvir-list(a)redhat.com', -- 1.9.3

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