Re: [PATCH 9/17] locks: add lock cancel command

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On Thu, Apr 05, 2007 at 07:40:59PM -0400, J. Bruce Fields wrote:
> From: Marc Eshel <eshel@xxxxxxxxxxxxxxx> - unquoted
> 
> Lock managers need to be able to cancel pending lock requests.  In the case
> where the exported filesystem manages its own locks, it's not sufficient just
> to call posix_unblock_lock(); we need to let the filesystem know what's
> happening too.
> 
> We do this by adding a new fcntl lock command: FL_CANCELLK.  Some day this
> might also be made available to userspace applications that could benefit from
> an asynchronous locking api.

Should we really add more and more subcases to ->lock that probably don't
share implementation code?  I'd much prefer adding different operations.

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