April 2026 - Devel - libvirt List Archives

[PATCH 0/6] qemu: Add infrastructure to prevent accidental disk shrink via 'virDomainBlockResize'
by Peter Krempa 01 Apr '26

01 Apr '26

Shrinking a disk accidentally equals data loss and thus very bad time for anyone mis-typing. This series adds a new flag to virDomainBlockResize to prevent such a thing if the user only intends to extend the disk. In virsh I've went a bit further and actually change the behaviour of 'virsh blockresize' to use the new feature if available to prevent mishaps. Peter Krempa (6): virDomainBlockResizeFlags: Convert to prefix-style docs API/qemu: Introduce 'VIR_DOMAIN_BLOCK_RESIZE_EXTEND' for 'virDomainBlockResize' virsh: blockresize: Introduce '--extend' flag API: Introduce 'VIR_DOMAIN_BLOCK_RESIZE_PROBE_FLAGS' for 'virDomainBlockResize' virsh/virt-admin: Add possibility to probe for new arguments virsh: blockresize: Use VIR_DOMAIN_BLOCK_RESIZE_EXTEND when available and introduce --allow-shrink docs/manpages/virsh.rst | 31 +++++++++++++++++++++++++- include/libvirt/libvirt-domain.h | 19 ++++++++++++++-- src/libvirt-domain.c | 17 +++++++++++++++ src/qemu/qemu_driver.c | 37 +++++++++++++++++++++++++++++++- src/vz/vz_driver.c | 7 +++++- tools/virsh-domain.c | 23 ++++++++++++++++++++ tools/virsh.c | 4 ++++ tools/virt-admin.c | 9 ++++++++ tools/vsh.c | 3 +++ tools/vsh.h | 1 + 10 files changed, 146 insertions(+), 5 deletions(-) -- 2.53.0

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[PATCH v2 0/3] security: Don't error out on seclabels of type='none'
by Michal Privoznik 01 Apr '26

01 Apr '26

v2 of: https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/OWDB… diff to v1: - In patch 3/3 do not validate secmodel against known models. Michal Prívozník (3): conf: Fix seclabel type parsing wrt default value security: Rewrite virSecurityManagerCheckModel() to use g_autofree security: Don't error out on seclabels of type='none' src/conf/domain_conf.c | 13 ++++++------- src/security/security_manager.c | 33 ++++++++++++++++++++++----------- 2 files changed, 28 insertions(+), 18 deletions(-) -- 2.52.0

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[PATCH 0/3] security: Don't error out on seclabels of type='none'
by Michal Privoznik 01 Apr '26

01 Apr '26

*** BLURB HERE *** Michal Prívozník (3): conf: Fix seclabel type parsing wrt default value security: Rewrite virSecurityManagerCheckModel() to use g_autofree security: Don't error out on seclabels of type='none' src/conf/domain_conf.c | 13 +++++------ src/security/security_manager.c | 41 ++++++++++++++++++++++++--------- 2 files changed, 36 insertions(+), 18 deletions(-) -- 2.52.0

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Release of libvirt-12.2.0
by Jiri Denemark 01 Apr '26

01 Apr '26

The 12.2.0 release of both libvirt and libvirt-python is tagged and signed tarballs are available at https://download.libvirt.org/ https://download.libvirt.org/python/ Thanks everybody who helped with this release by sending patches, reviewing, testing, or providing feedback. Your work is greatly appreciated. * Removed features * qemu: Stop advertising support for ``handle`` backend of 9p filesystems QEMU removed the feature in the 4.0 release, but our capability XML still reported it. * New features * qemu: Add support to configure IOMMUFD backend for whole VM In addition to setting IOMMUFD backend for each device it is possible to use the new ``<iommufd>`` element to enable IOMMUFD backend for all host devices. Users can still change it per device. * qemu: Add support to pass FD for IOMMUFD when starting VM Management applications running unprivileged libvirt can open /dev/iommu and pass FD to libvirt in order to change locked memory accounting. This is done via new ``<iommufd>`` element. * qemu: Add support for declaring that storage was zeroed for storage copy APIs The qemu driver now can skip zeroing of the storage during ``virDomainBlockCopy`` or migration with non-shared storage with the appropriate flags. This can be used for storage technologies which lack efficient zeroing support. * hyperv: Add basic snapshot functionality The hyperv driver now implements the following libvirt APIs: ``virDomainDefineXMLFlags()``, ``virDomainSnapshotLookupByName()``, ``virDomainListAllSnapshots()``, ``virDomainSnapshotNum()``, ``virDomainSnapshotGetXMLDesc()``, ``virDomainSnapshotCurrent()``, ``virDomainHasCurrentSnapshot()``, ``virDomainSnapshotGetParent()``. * Improvements * conf: support more than 255 vCPUs with amd-iommu With 256 or more vCPUs libvirt previously required EIM enabled for all models of IOMMU. This is not valid for AMD model and validation was changed so that XTSup is required there. Additionally, it is automatically enabled if needed. * Introduce VIR_CONNECT_GET_DOMAIN_CAPABILITIES_EXPAND_CPU_FEATURES flag This new flag for virConnectGetDomainCapabilities can be used to request the host-model CPU definition to include all supported features (normally only extra features relative to the selected CPU model are listed). * qemu: Add statistics for ``<dataStore>`` storage The bulk statistics (``virsh domstats --block --backing``) now report also information about the ``<dataStore>`` if given disk uses this feature. * hyperv: Hyper-V guests now report TPM device status in their domain xml definition. * Bug fixes * qemu: Fix crash when attaching network inteface with hostdev network Introduced in v12.1.0 by implementing IOMMUFD backend support for host devices. Enjoy. Jirka

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[PATCH] NEWS: mention new hyperv features
by Jonathon Jongsma 01 Apr '26

01 Apr '26

Signed-off-by: Jonathon Jongsma <jjongsma(a)redhat.com> --- NEWS.rst | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/NEWS.rst b/NEWS.rst index 4196222b40..0117ebc4a7 100644 --- a/NEWS.rst +++ b/NEWS.rst @@ -41,6 +41,14 @@ v12.2.0 (unreleased) appropriate flags. This can be used for storage technologies which lack efficient zeroing support. + * hyperv: Add basic snapshot functionality + + The hyperv driver now implements the following libvirt APIs: + ``virDomainDefineXMLFlags()``, ``virDomainSnapshotLookupByName()``, + ``virDomainListAllSnapshots()``, ``virDomainSnapshotNum()``, + ``virDomainSnapshotGetXMLDesc()``, ``virDomainSnapshotCurrent()``, + ``virDomainHasCurrentSnapshot()``, ``virDomainSnapshotGetParent()``. + * **Improvements** * conf: support more than 255 vCPUs with amd-iommu @@ -61,6 +69,9 @@ v12.2.0 (unreleased) The bulk statistics (``virsh domstats --block --backing``) now report also information about the ``<dataStore>`` if given disk uses this feature. + * hyperv: Hyper-V guests now report TPM device status in their domain xml + definition. + * **Bug fixes** * qemu: Fix crash when attaching network inteface with hostdev network -- 2.53.0

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