tree f5de29af3815e86167edb769feddd6013ab32d12
parent 0a82855a1a819f3de49781d42728f485fbd64284
author Max Reitz <mreitz@redhat.com> 1417018826 +0100
committer Stefan Hajnoczi <stefanha@redhat.com> 1421149676 +0000

block: JSON filenames and relative backing files

When using a relative backing file name, qemu needs to know the
directory of the top image file. For JSON filenames, such a directory
cannot be easily determined (e.g. how do you determine the directory of
a qcow2 BDS directly on top of a quorum BDS?). Therefore, do not allow
relative filenames for the backing file of BDSs only having a JSON
filename.

Furthermore, BDS::exact_filename should be used whenever possible. If
BDS::filename is not equal to BDS::exact_filename, the former will
always be a JSON object.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>