linux-kernel - Re: [PATCH 0/7] Permit filesystem local caching and NFS superblock sharing [try #13]

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Message-ID: <32013.1157377601@warthog.cambridge.redhat.com>
Date:	Mon, 04 Sep 2006 14:46:41 +0100
From:	David Howells <dhowells@...hat.com>
To:	Ian Kent <raven@...maw.net>
Cc:	David Howells <dhowells@...hat.com>, Andrew Morton <akpm@...l.org>,
	Trond Myklebust <trond.myklebust@....uio.no>,
	torvalds@...l.org, steved@...hat.com,
	linux-fsdevel@...r.kernel.org, linux-cachefs@...hat.com,
	nfsv4@...ux-nfs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/7] Permit filesystem local caching and NFS superblock sharing [try #13] 

Ian Kent <raven@...maw.net> wrote:

> This is the point I'm trying to make.
> I'm able to reproduce this with exports that don't have "nohide".
> The mkdir used to return EEXIST, possibly before getting to the EACCES
> test. It appears to be a change in semantic behavior and I can't see
> where it is coming from. autofs expects an EEXIST but not an EACCES and
> so doesn't perform the mount. I could ignore the EACCES but that would
> be cheating.

Here's something you can try:  Look in fs/nfs/dir.c.  Find nfs_lookup().  In
there, find the following lines:

	/* If we're doing an exclusive create, optimize away the lookup */
	if (nfs_is_exclusive_create(dir, nd))
		goto no_entry;

Comment that bit out and see what the effect it.

David
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