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backend abstraction for brlock pointless, but I have left it in place for now. It would be useful for other clustering systems that can't map to dbwrap, and would also be useful if we wanted to keep the remote function call capabilities in ctdb instead of the less efficient fetch_locked() call in dbwrap (This used to be commit 912c014b7c131ab051ff6eb2db4e68cb6fbbeb14)
This is the base of the new NTVFS subsystem for Samba. The model for NTVFS backends is quite different than for the older style VFS backends, in particular: - the NTVFS backends receive windows style file names, although they are in the unix charset (usually UTF8). This means the backend is responsible for mapping windows filename conventions to unix filename conventions if necessary - the NTVFS backends are responsible for changing effective UID before calling any OS local filesystem operations (if needed). The become_*() functions are provided to make this easier. - the NTVFS backends are responsible for resolving DFS paths - each NTVFS backend handles either disk, printer or IPC$ shares, rather than one backend handling all types - the entry points of the NTVFS backends correspond closely with basic SMB operations, wheres the old VFS was modelled directly on the POSIX filesystem interface. - the NTVFS backends are responsible for all semantic mappings, such as mapping dos file attributes, ACLs, file ownership and file times