Re: nfs locking for cluster filesystems

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On Thu, Apr 05, 2007 at 07:40:50PM -0400, J. Bruce Fields wrote:
> If a filesystem defines a ->lock() method, that method is called when an
> application uses fcntl(), but it isn't called from the code path used by
> the lock managers (lockd (for nfsv2/v3) and nfsd itself (for v4)).  The
> following patches remedy that.  (This hasn't been a problem until
> recently because the filesystems that define ->lock (nfs, cifs, etc.)
> aren't filesystems that nfsd exports.  The arrival of cluster
> filesystems changes that.)
> 
> We'd like an ack from Trond and/or Christoph before this goes into
> mainline, but it seems ready at least for testing in -mm.
> 
> The first four to six patches are actually just locks.c cleanup.

I've got an updated series addressing Christoph's comments (except that
it's still using FL_CANCEL instead of a ->cancel() file method).  I was
arguing with myself about what would be the least obnoxious way to send
the update:

	- resend all 17?  (Seems like mild overkill.)
	- resend just the last 10?  (The first 7 are identical to what's
	  in -mm.)
	- Send in an incremental patch?  (But I really wouldn't want
	  them submitted to the kernel that way.)
	- Ask you to fetch from the server-cluster-locking-api branch of
		git://linux-nfs.org/~bfields/linux.git
	  ?

Preferences?

--b.
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