Hi, Yesterday I ran into a weird situation where my libvirt RBD pool just wouldn't work.
Turned out the credentials I was using only had rw permissions for OSDs instead of rwx or *.
This caused rbd_open to fail, looking at librbd itself I understand why execute permissions are required to do so (locks, watches).
What is however the best way to detect if you don't have the required permissions?
This piece of code: http://libvirt.org/git/?p=libvirt.git;a=blob;f=src/storage/storage_backend_rbd.c;h=8a0e517502c482f23f01bc63e95f1dc210d711cd;hb=master#l215
I simply check if the open fails, but just "failed to open the RBD image" wasn't really that clear.
I'd like to give a more useful error instead of that, but what error codes can I expect?
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