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While invalid values need to be ignored when presenting VPD data to the user, it would be good to attempt to parse a valid portion of the VPD instead of marking it invalid as a whole. Based on a mailing list discussion, the set of accepted characters is extended to the set of printable ASCII characters. https://listman.redhat.com/archives/libvir-list/2021-October/msg01043.html The particular example encountered on real hardware was multi-faceted: * "N/A" strings present in read-only fields. This would not be a useful valid value for a field (especially if a unique serial number is expected), however, it was decided to delegate handling of those kinds of values to higher-level software; * "4W/1W PCIeG2x4" - looks like some vendors use even more printable characters in the ASCII range than we currently allow. Since the PCI/PCIe VPD specs mention alphanumeric characters without specifying the full character set, it looks like this is ambiguous for vendors and they tend to use printable ASCII characters; * 0xFF bytes present in VPD-W field values. Those bytes do not map to printable ASCII code points and were probably used by the vendor as placeholders. Ignoring the whole VPD because of that would be too strict. Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Dmitrii Shcherbakov <dmitrii.shcherbakov@canonical.com>
Libvirt API for virtualization
Libvirt provides a portable, long term stable C API for managing the virtualization technologies provided by many operating systems. It includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER Hypervisor.
For some of these hypervisors, it provides a stateful management daemon which runs on the virtualization host allowing access to the API both by non-privileged local users and remote users.
Layered packages provide bindings of the libvirt C API into other languages including Python, Perl, PHP, Go, Java, OCaml, as well as mappings into object systems such as GObject, CIM and SNMP.
Further information about the libvirt project can be found on the website:
License
The libvirt C API is distributed under the terms of GNU Lesser General Public License, version 2.1 (or later). Some parts of the code that are not part of the C library may have the more restrictive GNU General Public License, version 2.0 (or later). See the files COPYING.LESSER and COPYING for full license terms & conditions.
Installation
Instructions on building and installing libvirt can be found on the website:
https://libvirt.org/compiling.html
Contributing
The libvirt project welcomes contributions in many ways. For most components the best way to contribute is to send patches to the primary development mailing list. Further guidance on this can be found on the website:
https://libvirt.org/contribute.html
Contact
The libvirt project has two primary mailing lists:
- libvirt-users@redhat.com (for user discussions)
- libvir-list@redhat.com (for development only)
Further details on contacting the project are available on the website: