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$ touch /var/lib/libvirt/images/'a<b>c' $ virsh pool-refresh default $ virsh vol-dumpxml 'a<b>c' default | head -n2 <volume> <name>a<b>c</name> Oops. That's not valid XML. And when we fix the XML generation, it fails RelaxNG validation. I'm also tired of seeing <key>(null)</key> in the example output for volume xml; while we used NULLSTR() to avoid a NULL deref rather than relying on glibc's printf extension behavior, it's even better if we avoid the issue in the first place. But this requires being careful that we don't invalidate any storage backends that were relying on key being unassigned during virStoragVolCreateXML[From]. I would have split this into two patches (one for escaping, one for avoiding <key>(null)</key>), but since they both end up touching a lot of the same test files, I ended up merging it into one. Note that this patch allows pretty much any volume name that can appear in a directory (excluding . and .. because those are special), but does nothing to change the current (unenforced) RelaxNG claim that pool names will consist only of letters, numbers, _, -, and +. Tightening the C code to match RelaxNG patterns and/or relaxing the grammar to match the C code for pool names is a task for another day (but remember, we DID recently tighten C code for domain names to exclude a leading '.'). * src/conf/storage_conf.c (virStoragePoolSourceFormat) (virStoragePoolDefFormat, virStorageVolTargetDefFormat) (virStorageVolDefFormat): Escape user-controlled strings. (virStorageVolDefParseXML): Parse key, for use in unit tests. * src/storage/storage_driver.c (storageVolCreateXML) (storageVolCreateXMLFrom): Ensure parsed key doesn't confuse volume creation. * docs/schemas/basictypes.rng (volName): Relax definition. * tests/storagepoolxml2xmltest.c (mymain): Test it. * tests/storagevolxml2xmltest.c (mymain): Likewise. * tests/storagepoolxml2xmlin/pool-dir-naming.xml: New file. * tests/storagepoolxml2xmlout/pool-dir-naming.xml: Likewise. * tests/storagevolxml2xmlin/vol-file-naming.xml: Likewise. * tests/storagevolxml2xmlout/vol-file-naming.xml: Likewise. * tests/storagevolxml2xmlout/vol-*.xml: Fix fallout. Signed-off-by: Eric Blake <eblake@redhat.com> (cherry picked from commit 6cc4d6a3fe82653c607c4f159901790298e80e1f)
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>