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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>
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==============================
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:
https://libvirt.org
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:
https://libvirt.org/contact.html