On Wed, May 30, 2007 at 09:35:32AM +0100, David Howells wrote:
> J. Bruce Fields <[email protected]> wrote:
>
> > --without having tried to understand how they're actually used, these
> > data structures (like the pending_locks and granted_locks lists) seem to
> > duplicate stuff that's already kept in fs/locks.c. Is there a reason
> > they're required?
>
> Yes. I need to get the server lock first, before going to the VFS locking
> routines.
That doesn't really answer the question. The NFS client has similar
requirements, but it doesn't have to duplicate the per-inode lists of
granted locks, for example.
> The VFS routines as they stand aren't particularly useful, and they
> permit things that AFS doesn't support (such as lock upgrading).
Sure. But handling those things is just a matter of checking for a few
special cases and making sure they're rejected before calling the posix
routines.
--b.
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