1 Commits

Author	SHA1	Message	Date
Eric Blake	6cb4acce8b	seclabel: extend XML to allow per-disk label overrides ... When doing security relabeling, there are cases where a per-file override might be appropriate. For example, with a static label and relabeling, it might be appropriate to skip relabeling on a particular disk, where the backing file lives on NFS that lacks the ability to track labeling. Or with dynamic labeling, it might be appropriate to use a custom (non-dynamic) label for a disk specifically intended to be shared across domains. The new XML resembles the top-level <seclabel>, but with fewer options (basically relabel='no', or <label>text</label>): <domain ...> ... <devices> <disk type='file' device='disk'> <source file='/path/to/image1'> <seclabel relabel='no'/> <!-- override for just this disk --> </source> ... </disk> <disk type='file' device='disk'> <source file='/path/to/image1'> <seclabel relabel='yes'> <!-- override for just this disk --> <label>system_u:object_r:shared_content_t:s0</label> </seclabel> </source> ... </disk> ... </devices> <seclabel type='dynamic' model='selinux'> <baselabel>text</baselabel> <!-- used for all devices without override --> </seclabel> </domain> This patch only introduces the XML and documentation; future patches will actually parse and make use of it. The intent is that we can further extend things as needed, adding a per-device <seclabel> in more places (such as the source of a console device), and possibly allowing a <baselabel> instead of <label> for labeling where we want to reuse the cNNN,cNNN pair of a dynamically labeled domain but a different base label. First suggested by Daniel P. Berrange here: https://www.redhat.com/archives/libvir-list/2011-December/msg00258.html * docs/schemas/domaincommon.rng (devSeclabel): New define. (disk): Use it. * docs/formatdomain.html.in (elementsDisks, seclabel): Document the new XML. * tests/qemuxml2argvdata/qemuxml2argv-seclabel-dynamic-override.xml: New test, to validate RNG.	2011-12-30 10:57:58 +08:00