Re: [libvirt] [PATCH v3] 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 vol-create on the source (@origvol).

Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- diff to v2: - changed the error message if volume is in use - reworded commit message src/conf/storage_conf.h | 1 + src/storage/storage_driver.c | 32 ++++++++++++++++++++++++++++++-- 2 files changed, 31 insertions(+), 2 deletions(-)