d6ecd766aa
For the handling of usb we already allow plenty of read access, but so far /sys/bus/usb/devices only needed read access to the directory to enumerate the symlinks in there that point to the actual entries via relative links to ../../../devices/. But in more recent systemd with updated libraries a program might do getattr calls on those symlinks. And while symlinks in apparmor usually do not matter, as it is the effective target of an access that has to be allowed, here the getattr calls are on the links themselves. On USB hostdev usage that causes a set of denials like: apparmor="DENIED" operation="getattr" class="file" name="/sys/bus/usb/devices/usb1" comm="qemu-system-x86" requested_mask="r" denied_mask="r" ... It is safe to read the links, therefore add a rule to allow it to the block of rules that covers the usb related access. Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com> Reviewed-by: Michal Privoznik <mprivozn at redhat.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: