Re: LOOKUP_CREATE checks in nfs ->create() instances

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On Thu, 2011-02-17 at 03:37 +0000, Al Viro wrote: 
> 	When are they _not_ true?  AFAICS, calls of ->create() with
> non-NULL nameidata are very limited to start with:
> 	* ecryptfs one - called from its own ->create(), without changes
> in LOOKUP_CREATE presence.
> 	* sys_mknodat() - called after we'd done lookup_create(), which
> sets LOOKUP_CREATE (and LOOKUP_EXCL), with O_EXCL in intent flags.  Nothing
> ever removes LOOKUP_CREATE once it's set.
> 	* __open_namei_create(), which is called from from do_filp_open()
> and only if we had O_CREAT passed in flags.  In that case LOOKUP_CREATE
> will be set before we get there.
> 
> What am I missing here?  AFAICS, there's no way to get nfs ->create() methods
> called without LOOKUP_CREATE present in nd->flags...

Hi Al,

That is probably a remnant of the times before lookup_create() was
changed to set the LOOKUP_CREATE intent in 2.6.18.

I'm fine with getting rid of those checks if they are no longer needed.

Cheers
  Trond

-- 
Trond Myklebust
Linux NFS client maintainer

NetApp
Trond.Myklebust@xxxxxxxxxx
www.netapp.com

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