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[PATCH v2] NEWS: Mention removal of compile time helper program lookup, virito-net ABI check and FDC capabilities
by Peter Krempa 30 May '25

30 May '25

From: Peter Krempa <pkrempa(a)redhat.com> Signed-off-by: Peter Krempa <pkrempa(a)redhat.com> --- v2: - moved the entry about $PATH lookup under "packaging changes" - added a note that it fixes libvirt on distros which merged /sbin to /bin but only on new installs NEWS.rst | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/NEWS.rst b/NEWS.rst index fd577021b3..d1bb19c8db 100644 --- a/NEWS.rst +++ b/NEWS.rst @@ -21,6 +21,25 @@ v11.4.0 (unreleased) Support for the recently released IBM POWER11 processor was added. +* **Packaging changes** + + * All helper programs are now detected from ``$PATH`` during runtime + + All of the code was now converted to dynamically look up helper programs + in ``$PATH`` rather than doing the lookup at build time and then compiling + in the result. + + Programs ``mount``, ``umount``, ``mkfs``, ``modprobe``, ``rmmod``, + ``numad``, ``dmidecode``, ``ip``, ``tc``, ``mdevctl``, ``mm-ctl``, + ``iscsiadm``, ``ovs-vsctl``, ``pkttyagent``, ``bhyveload``, ``bhyvectl``, + ``bhyve``, ``ifconfig``, ``vzlist``, ``vzctl``, ``vzmigrate``, and the + tools from the lvm suite (``vgchange``, ``lvcreate``, etc..) are now not + needed during build and will still work properly if placed in ``$PATH``. + + This also ensures that libvirt works correctly on distros that are + transitioning ``/sbin`` into ``/bin`` and upgraded installations have + a different layout from fresh installations. + * **Improvements** * virsh: Add option ``--no-pkttyagent`` @@ -35,6 +54,11 @@ v11.4.0 (unreleased) <nvram/> </os> + * qemu: Improve accuracy of FDC/floppy device support statement in capabilities XML + + The data is now based on the presence of the controller in qemu rather than + just a denylist of machine types where floppies not work. + * **Bug fixes** * qemu: Fix failure when reverting to internal snapshots @@ -52,6 +76,13 @@ v11.4.0 (unreleased) destination host to crash when trying to resume failed post-copy migration. + * qemu: Treat the ``queues`` configuration of ``virtio-net`` as guest ABI + + The queue count itself isn't a device frontend property but libvirt uses + it to calculate ``vectors`` option of the device which is a guest OS visible + property, thus ``queues`` must not change during migration. The ABI stability + check now handles this properly. + v11.3.0 (2025-05-02) ==================== -- 2.49.0

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Plans for 11.4.0 release (freeze on 2025-05-27)
by Jiri Denemark 30 May '25

30 May '25

We are getting close to 11.4.0 release of libvirt. To aim for the release on Monday 02 Jun I suggest entering the freeze on Tuesday 27 May and tagging RC2 on Friday 30 May. I hope this works for everyone. Jirka

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[PATCH] virConnectAuthCallbackDefault: Return failure if 'virGetPassword' returns NULL
by Peter Krempa 29 May '25

29 May '25

From: Peter Krempa <pkrempa(a)redhat.com> virGetPassword can return NULL on linux or BSD if it fails. The caller in virConnectAuthCallbackDefault does dereference it unconditionally. Return failure if virGetPassword returns NULL. Fixes: db72866310d1e520efa8ed2d4589bdb5e76a1c95 Closes: https://gitlab.com/libvirt/libvirt/-/issues/777 Signed-off-by: Peter Krempa <pkrempa(a)redhat.com> --- src/libvirt.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/libvirt.c b/src/libvirt.c index 581fc6deea..375d3fa7ef 100644 --- a/src/libvirt.c +++ b/src/libvirt.c @@ -158,7 +158,9 @@ virConnectAuthCallbackDefault(virConnectCredentialPtr cred, if (fflush(stdout) != 0) return -1; - bufptr = virGetPassword(); + if (!(bufptr = virGetPassword())) + return -1; + if (STREQ(bufptr, "")) VIR_FREE(bufptr); break; -- 2.49.0

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[PATCH] NEWS: Mention removal of compile time helper program lookup, virito-net ABI check and FDC capabilities
by Peter Krempa 29 May '25

29 May '25

From: Peter Krempa <pkrempa(a)redhat.com> Signed-off-by: Peter Krempa <pkrempa(a)redhat.com> --- NEWS.rst | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/NEWS.rst b/NEWS.rst index fd577021b3..884fcad2d8 100644 --- a/NEWS.rst +++ b/NEWS.rst @@ -35,6 +35,24 @@ v11.4.0 (unreleased) <nvram/> </os> + * All helper programs are now detected from ``$PATH`` during runtime + + All of the code was now converted to dynamically look up helper programs + in ``$PATH`` rather than doing the lookup at build time and then compiling + in the result. + + Programs ``mount``, ``umount``, ``mkfs``, ``modprobe``, ``rmmod``, + ``numad``, ``dmidecode``, ``ip``, ``tc``, ``mdevctl``, ``mm-ctl``, + ``iscsiadm``, ``ovs-vsctl``, ``pkttyagent``, ``bhyveload``, ``bhyvectl``, + ``bhyve``, ``ifconfig``, ``vzlist``, ``vzctl``, ``vzmigrate``, and the + tools from the lvm suite (``vgchange``, ``lvcreate``, etc..) are now not + needed during build and will still work properly if placed in ``$PATH``. + + * qemu: Improve accuracy of FDC/floppy device support statement in capabilities XML + + The data is now based on the presence of the controller in qemu rather than + just a denylist of machine types where floppies not work. + * **Bug fixes** * qemu: Fix failure when reverting to internal snapshots @@ -52,6 +70,13 @@ v11.4.0 (unreleased) destination host to crash when trying to resume failed post-copy migration. + * qemu: Treat the ``queues`` configuration of ``virtio-net`` as guest ABI + + The queue count itself isn't a device frontend property but libvirt uses + it to calculate ``vectors`` option of the device which is a guest OS visible + property, thus ``queues`` must not change during migration. The ABI stability + check now handles this properly. + v11.3.0 (2025-05-02) ==================== -- 2.49.0

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[PATCH 0/3] util: Fix virFileIsSharedFSOverride on nonexistent paths
by Jiri Denemark 29 May '25

29 May '25

Jiri Denemark (3): util: Document limitation of virFileCanonicalizePath util: Introduce virFileGetExistingParent helper util: Fix virFileIsSharedFSOverride on nonexistent paths src/util/virfile.c | 76 +++++++++++++++++++++++++++------------------- 1 file changed, 45 insertions(+), 31 deletions(-) -- 2.49.0

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[PATCH 00/15] storage_file_probe: Fix ancient bug in qcow2 header extensions parser and refactor the image probing callbacks
by Peter Krempa 29 May '25

29 May '25

Patch 3 fixes an almost 15 year old bug in the qcow2 header extension parser which breaks when the qcow2 image has more than 1 header extension. For us it caused problems for qcow2 images with data file and backing file which we didn't use before, and the only field we cared about was always put first by qemu. Ironically we did have a test file that had such config but it was missed in the test output. Patches 1, 2 are refinment of debug tools I used to see what's happening. Patch 4 adds bitmaps to some test images. We don't parse them but just to be sure. The rest of the series refactors the metadata parser callbacks with the end goal to not parse the qcow2 header extensions twice. Peter Krempa (15): qcow2GetExtensions: Add debug logs for interesting fields in qcow2 header extension parser virstoragetest: Reformat output to hilight dataFile relationship storage_file_probe: qcow2GetExtensions: Fix qcow2 header extension parsing virstoragetest: Add qcow2 bitmaps to some images storage_file_probe: Add image specific callback taking the whole virStorageSource storage_file_probe: Refactor cowGetBackingStore into cowGetImageSpecific storage_file_probe: Refactor qedGetBackingStore into qedGetImageSpecific storage_file_probe: Refactor vmdk4GetBackingStore into vmdk4GetImageSpecific storage_file_probe: Refactor qcowXGetBackingStore into specific callbacks for qcow and qcow2 storage_file_probe: Move logic from qcow2GetClusterSize to qcow2GetImageSpecific storage_file_probe: Move qcow2GetFeatures(ProcessGroup) functions storage_file_probe: Call qcow2GetFeatures from qcow2GetImageSpecific storage_file_probe: Parse all qcow2 extensions at once storage_file_probe: Move setting of 'compat' attribute to qcow2GetFeatures storage_file_probe: Remove unused image probing callbacks src/storage_file/storage_file_probe.c | 439 ++++++++---------- tests/virstoragetest.c | 20 +- .../virstoragetestdata/images/datafile.qcow2 | Bin 327680 -> 393256 bytes .../images/qcow2_qcow2-qcow2_qcow2-auto.qcow2 | Bin 196616 -> 327720 bytes .../images/qcow2datafile-datafile.qcow2 | Bin 196616 -> 327720 bytes tests/virstoragetestdata/out/directory-dir | 1 + tests/virstoragetestdata/out/directory-none | 1 + tests/virstoragetestdata/out/directory-raw | 1 + .../out/qcow2-auto_qcow2-qcow2_raw-raw | 1 + .../out/qcow2-auto_raw-raw-relative | 1 + tests/virstoragetestdata/out/qcow2-datafile | 15 +- .../out/qcow2-protocol-backing-file | 2 + .../out/qcow2-protocol-backing-nbd | 2 + .../out/qcow2-qcow2_nbd-raw | 2 + .../out/qcow2-qcow2_qcow2-auto | 2 + .../out/qcow2-qcow2_qcow2-qcow2_qcow2-auto | 3 + .../out/qcow2-qcow2_qcow2-qcow2_raw-auto | 3 + .../out/qcow2-qcow2_qcow2-qcow2_raw-raw | 3 + .../out/qcow2-qcow2_raw-raw-relative | 2 + tests/virstoragetestdata/out/qcow2-symlinks | 3 + .../out/qcow2datafile-qcow2_qcow2-datafile | 24 +- tests/virstoragetestdata/out/qed-auto_raw | 1 + tests/virstoragetestdata/out/qed-qed_raw | 2 + tests/virstoragetestdata/out/raw-auto | 1 + tests/virstoragetestdata/out/raw-raw | 1 + 25 files changed, 263 insertions(+), 267 deletions(-) -- 2.49.0

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[PATCH 0/3] bhyve: implement domainInterfaceStats and domainMemoryStats
by Roman Bogorodskiy 29 May '25

29 May '25

Roman Bogorodskiy (3): bhyve: implement domainInterfaceStats virprocess: implement virProcessGetStatInfo() for FreeBSD bhyve: implement domainMemoryStats src/bhyve/bhyve_driver.c | 84 +++++++++++++++++++++++++++++++ src/util/virprocess.c | 104 +++++++++++++++++++++++++++++---------- 2 files changed, 162 insertions(+), 26 deletions(-) -- 2.49.0

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[RFC PATCH v3 0/6] RFC: Add Arm CCA support for getting capability information and running Realm VM
by Kazuhiro Abe 29 May '25

29 May '25

Hi, all. This patch adds Arm CCA support to QEMU driver for aarch64 system. CCA is an abbreviation for Arm Confidential Compute Architecture feature, it enhances the virtualization capabilities of the platform by separating the management of resources from access to those resources. We are not yet at the stage where we can merge this patch as host Linux/QEMU support is not yet merged, but I would like to receive reviews and comments on the overall direction. Changes in v3: Supports two launch VM options: personalization-value and measurement-log. The measurement-log was added to allow us to check if the data loaded into the guest RAM is a good image. The Realm Personalization Value (RPV) was added to allow us to distinguish between realms that have the same initial measurement results. This was added as a new Realm startup option in Linaro QEMU after the v2 patch was posted. That's why we made this change. [summary] At this stage, all you can do is getting the CCA capability with the virsh domcapabilities command and start the CCA VM with the virsh create command. capability info uses QEMU QMP to query QEMU options. The option that exists now is for selecting a hash algorithm. QEMU QMP sections currently only contains a single member, but is wrapped in sections for expansion. [Capability example] Execution results of 'virsh domcapability" on QEMU <domaincapabilities> ... <features> ... </sgx> <cca supported='yes'> <enum name='measurement-algo'> <value>sha256</value> <value>sha512</value> </enum> </cca> <hyperv supported='yes'> ... </features> </domaincapabilities> [XML example] <domain> ... <launchsecurity type='cca'> <measurement-algo>sha256</measurement-algo> </launchsecurity> ... </domain> [limitations/tests] To obtain capability info, it is necessary to support the QEMU QMP command, which QEMU does not yet support. We added a QMP command to retrieve CCA info for test (See "[software version]" below). I need to check qemu_firmware.c to see if my CPU firmware supports CCA. Since it's not implemented yet, I'll wait until a Linux distributor provides me with a JSON file for CCA. We have confirmed that the added tests (qemucapabilitiestest, domaincapstest and qemuxmlconftest) and the CCA VM startup test (starting the CCA VM from the virsh create command) passed. The "personalization-value" and "measurement-log" parameters that exist in the current Linaro QEMU cca/latest branch will not be specified as CCA VM startup parameters with the virsh create command. [software version] I followed the steps in Linaro's blog below. https://linaro.atlassian.net/wiki/spaces/QEMU/pages/29051027459/Building+an… The QEMU used was enhanced with CCA QMP command and found at: https://github.com/Kazuhiro-Abe-fj/linaro_qemu/tree/cca-latest-qmp which is based on Linaro QEMU (cca/latest) https://git.codelinaro.org/linaro/dcap/qemu/-/tree/cca/latest?ref_type=heads RFC v1: https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/V4S5… RFC v2: https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/message/5VZ… Signed-off-by: Kazuhiro Abe <fj1078ii(a)aa.jp.fujitsu.com> Akio Kakuno (6): src: Add ARM CCA support in qemu driver to launch VM src: Add ARM CCA support in domain capabilities command src: Add ARM CCA support in domain schema qemucapabilitiestest: Adds Arm CCA support domaincapstest: Adds Arm CCA support qemuxmlconftest: Adds Arm CCA support docs/formatdomain.rst | 43 + docs/formatdomaincaps.rst | 27 +- src/conf/domain_capabilities.c | 48 + src/conf/domain_capabilities.h | 12 + src/conf/domain_conf.c | 25 + src/conf/domain_conf.h | 9 + src/conf/domain_validate.c | 1 + src/conf/schemas/domaincaps.rng | 36 + src/conf/schemas/domaincommon.rng | 26 + src/conf/virconftypes.h | 2 + src/libvirt_private.syms | 1 + src/qemu/qemu_capabilities.c | 145 + src/qemu/qemu_capabilities.h | 4 + src/qemu/qemu_cgroup.c | 2 + src/qemu/qemu_command.c | 29 + src/qemu/qemu_driver.c | 2 + src/qemu/qemu_firmware.c | 1 + src/qemu/qemu_monitor.c | 10 + src/qemu/qemu_monitor.h | 3 + src/qemu/qemu_monitor_json.c | 98 + src/qemu/qemu_monitor_json.h | 4 + src/qemu/qemu_namespace.c | 2 + src/qemu/qemu_process.c | 4 + src/qemu/qemu_validate.c | 4 + src/security/security_dac.c | 2 + .../qemu_9.1.0-virt.aarch64.xml | 244 + tests/domaincapsdata/qemu_9.1.0.aarch64.xml | 244 + .../caps_9.1.0_aarch64.replies | 36222 ++++++++++++++++ .../caps_9.1.0_aarch64.xml | 530 + .../launch-security-cca.aarch64-latest.args | 30 + .../launch-security-cca.aarch64-latest.xml | 24 + tests/qemuxmlconfdata/launch-security-cca.xml | 16 + tests/qemuxmlconftest.c | 2 + 33 files changed, 37851 insertions(+), 1 deletion(-) create mode 100644 tests/domaincapsdata/qemu_9.1.0-virt.aarch64.xml create mode 100644 tests/domaincapsdata/qemu_9.1.0.aarch64.xml create mode 100644 tests/qemucapabilitiesdata/caps_9.1.0_aarch64.replies create mode 100644 tests/qemucapabilitiesdata/caps_9.1.0_aarch64.xml create mode 100644 tests/qemuxmlconfdata/launch-security-cca.aarch64-latest.args create mode 100644 tests/qemuxmlconfdata/launch-security-cca.aarch64-latest.xml create mode 100644 tests/qemuxmlconfdata/launch-security-cca.xml -- 2.43.5

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[libvirt PATCHv2 0/7] qemu: introduce amd-iommu support
by Ján Tomko 28 May '25

28 May '25

Ján Tomko (7): qemu: introduce QEMU_CAPS_AMD_IOMMU qemu: introduce QEMU_CAPS_PCI_ID qemu: add IOMMU model amd docs: formatdomain: document intel-only IOMMU attributes conf: add passthrough and xtsup attributes for IOMMU conf: reject some attributes not applicable to intel IOMMU qemu: format pt and xstup on the command line docs/formatdomain.rst | 22 +++- src/conf/domain_conf.c | 31 +++++ src/conf/domain_conf.h | 3 + src/conf/domain_validate.c | 22 ++++ src/conf/schemas/domaincommon.rng | 11 ++ src/qemu/qemu_capabilities.c | 10 ++ src/qemu/qemu_capabilities.h | 2 + src/qemu/qemu_command.c | 30 +++++ src/qemu/qemu_domain_address.c | 4 + src/qemu/qemu_validate.c | 22 ++++ .../caps_10.0.0_x86_64+amdsev.replies | 102 +++++++++++------ .../caps_10.0.0_x86_64+amdsev.xml | 1 + .../caps_10.0.0_x86_64.replies | 106 ++++++++++++------ .../caps_10.0.0_x86_64.xml | 2 + .../caps_6.2.0_x86_64.replies | 102 +++++++++++------ .../caps_6.2.0_x86_64.xml | 1 + .../caps_7.0.0_x86_64.replies | 80 +++++++------ .../caps_7.0.0_x86_64.xml | 1 + .../caps_7.1.0_x86_64.replies | 102 +++++++++++------ .../caps_7.1.0_x86_64.xml | 1 + .../caps_7.2.0_x86_64+hvf.replies | 102 +++++++++++------ .../caps_7.2.0_x86_64+hvf.xml | 1 + .../caps_7.2.0_x86_64.replies | 102 +++++++++++------ .../caps_7.2.0_x86_64.xml | 1 + .../caps_8.0.0_x86_64.replies | 80 +++++++------ .../caps_8.0.0_x86_64.xml | 1 + .../caps_8.1.0_x86_64.replies | 102 +++++++++++------ .../caps_8.1.0_x86_64.xml | 1 + .../caps_8.2.0_x86_64.replies | 102 +++++++++++------ .../caps_8.2.0_x86_64.xml | 1 + .../caps_9.0.0_x86_64.replies | 80 +++++++------ .../caps_9.0.0_x86_64.xml | 1 + .../caps_9.1.0_x86_64.replies | 102 +++++++++++------ .../caps_9.1.0_x86_64.xml | 1 + .../caps_9.2.0_x86_64+amdsev.replies | 102 +++++++++++------ .../caps_9.2.0_x86_64+amdsev.xml | 1 + .../caps_9.2.0_x86_64.replies | 102 +++++++++++------ .../caps_9.2.0_x86_64.xml | 1 + .../amd-iommu.x86_64-latest.args | 35 ++++++ .../amd-iommu.x86_64-latest.xml | 1 + tests/qemuxmlconfdata/amd-iommu.xml | 39 +++++++ tests/qemuxmlconftest.c | 2 + 42 files changed, 1161 insertions(+), 454 deletions(-) create mode 100644 tests/qemuxmlconfdata/amd-iommu.x86_64-latest.args create mode 120000 tests/qemuxmlconfdata/amd-iommu.x86_64-latest.xml create mode 100644 tests/qemuxmlconfdata/amd-iommu.xml -- 2.49.0

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[PATCH] qemu: Fix error when migration with shared TPM storage is unsupported
by Jiri Denemark 28 May '25

28 May '25

From: Jiri Denemark <jdenemar(a)redhat.com> The VIR_ERR_NO_SUPPORT error is supposed to be used for unsupported driver APIs. It is incorrectly used when swtpm does not support migration with shared storage resulting in a rather strange error message: this function is not supported by the connection driver: the running swtpm does not support migration with shared storage The correct VIR_ERR_OPERATION_UNSUPPORTED error code provides a much better message: Operation not supported: the running swtpm does not support migration with shared storage Signed-off-by: Jiri Denemark <jdenemar(a)redhat.com> --- src/qemu/qemu_migration.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c index 1f91ad1117..2400750ee4 100644 --- a/src/qemu/qemu_migration.c +++ b/src/qemu/qemu_migration.c @@ -1723,7 +1723,7 @@ qemuMigrationSrcIsAllowed(virDomainObj *vm, if (qemuTPMHasSharedStorage(driver, vm->def) && !qemuTPMCanMigrateSharedStorage(vm->def)) { - virReportError(VIR_ERR_NO_SUPPORT, "%s", + virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s", _("the running swtpm does not support migration with shared storage")); return false; } -- 2.49.0

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