Support multiple writers to underlying file system

[mcassaniti]

I am looking to mount a GlusterFS volume with encryption over the top. While GlusterFS currently has some encryption support, it is lacking encryption of everything other than the file data. I don't know if it does per file IV either.

To enable what I'm thinking of would require locking of the underlying file system when files are open, and need either read or write locks depending on what access to the file was required. Perhaps byte range locking of the file header can be used so that client requests for locking don't interfere.

[benrubson]

Not sure what is needed here ? Is it simply a duplicate of #227 ? Thx !

[mcassaniti]

It's not a duplicate. #227 seems to cover multiple writers from the same machine, but one node to handle those writes. This issue is for multiple nodes where each node accesses an underlying shared FS, then mounts EncFS over the top. You could simulate this with multiple EncFS mounts of the same base directory.