Re: [libvirt] [PATCH] storageVolCreateXMLFrom: Allow multiple accesses to origvol

When creating a new volume, it is possible to copy data into it from another already existing volume (referred to as @origvol). Obviously, the read-only access to @origvol is required, which is thread safe (probably not performance-wise though). However, with current code both @newvol and @origvol are marked as building for the time of copying data from the @origvol to @newvol. The rationale behind is to disallow some operations on both @origvol and @newvol, e.g. vol-wipe, vol-delete, vol-download. While it makes sense to not allow such operations on partly copied mirror, but it doesn't make sense to disallow the operations on the source (@origvol).