From: David Howells <dhowells@redhat.com>
To: Ian Kent <raven@themaw.net>
Cc: David Howells <dhowells@redhat.com>,
Trond Myklebust <trond.myklebust@fys.uio.no>,
Andrew Morton <akpm@osdl.org>,
torvalds@osdl.org, steved@redhat.com,
linux-fsdevel@vger.kernel.org, linux-cachefs@redhat.com,
nfsv4@linux-nfs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/7] Permit filesystem local caching and NFS superblock sharing [try #13]
Date: Wed, 06 Sep 2006 10:51:46 +0100 [thread overview]
Message-ID: <8912.1157536306@warthog.cambridge.redhat.com> (raw)
In-Reply-To: <1157518718.3066.22.camel@raven.themaw.net>
Ian Kent <raven@themaw.net> wrote:
> > Not if you've already caused the NFS filesystem to create a "dummy" dentry
> > that's a directory because you couldn't see that what that name
> > corresponds to on the server is actually a symlink.
>
> Shouldn't stat tell me if this is a symlink?
You may not be able to find out from the server what it is you're trying to
deal with because you may not have permission to do so, or because whatever it
is may not be exported. The first may be the trickiest to deal with because
the MOUNT service for NFS2 and NFS3 can jump you over bits of the path you
can't otherwise access.
The problem actually comes when the conditions on the server change; perhaps an
intermediate directory is made accessible on the server and suddenly the client
can see inside of it. It may then find out that what it had assumed to be
directories, and what it had set dummy directory dentries up for, aren't.
David
next prev parent reply other threads:[~2006-09-06 9:52 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-30 19:31 [PATCH 0/7] Permit filesystem local caching and NFS superblock sharing [try #13] David Howells
2006-08-30 19:31 ` [PATCH 1/7] FS-Cache: Provide a filesystem-specific sync'able page bit " David Howells
2006-08-30 19:31 ` [PATCH 2/7] FS-Cache: Generic filesystem caching facility " David Howells
2006-08-30 19:32 ` [PATCH 3/7] FS-Cache: Release page->private after failed readahead " David Howells
2006-08-30 19:32 ` [PATCH 4/7] FS-Cache: Make kAFS use FS-Cache " David Howells
2006-08-30 19:32 ` [PATCH 5/7] NFS: Use local caching " David Howells
2006-08-30 19:32 ` [PATCH 6/7] FS-Cache: CacheFiles: ia64: missing copy_page export " David Howells
2006-08-30 19:32 ` [PATCH 7/7] FS-Cache: CacheFiles: A cache that backs onto a mounted filesystem " David Howells
2006-08-30 19:52 ` [PATCH 0/7] Permit filesystem local caching and NFS superblock sharing " Andrew Morton
2006-08-30 20:37 ` David Howells
2006-08-30 20:55 ` Andrew Morton
2006-08-31 9:58 ` David Howells
2006-08-31 17:21 ` Andrew Morton
2006-08-31 17:26 ` Trond Myklebust
2006-08-31 17:42 ` David Howells
2006-08-31 18:04 ` Andrew Morton
2006-09-01 13:08 ` David Howells
2006-09-01 16:34 ` Andrew Morton
2006-09-01 17:00 ` Trond Myklebust
2006-09-02 2:50 ` Andrew Morton
2006-09-02 4:11 ` Ian Kent
2006-09-02 5:58 ` Andrew Morton
2006-09-03 6:21 ` Ian Kent
2006-09-03 6:30 ` Andrew Morton
2006-09-03 6:43 ` Ian Kent
2006-09-03 16:58 ` Andrew Morton
2006-09-04 2:23 ` Ian Kent
2006-09-04 5:40 ` Ian Kent
2006-09-02 4:49 ` Ian Kent
2006-09-04 11:52 ` David Howells
2006-09-04 11:52 ` David Howells
2006-09-04 13:24 ` Ian Kent
2006-09-05 1:57 ` Trond Myklebust
2006-09-05 2:55 ` Ian Kent
2006-09-05 3:50 ` Trond Myklebust
2006-09-05 4:03 ` Ian Kent
2006-09-05 4:53 ` Trond Myklebust
2006-09-05 6:06 ` Ian Kent
2006-09-05 7:01 ` Ian Kent
2006-09-05 12:52 ` Trond Myklebust
2006-09-06 4:54 ` Ian Kent
2006-09-05 9:40 ` David Howells
2006-09-05 10:20 ` Ian Kent
2006-09-05 10:37 ` David Howells
2006-09-05 12:20 ` Ian Kent
2006-09-05 13:38 ` David Howells
2006-09-06 4:58 ` Ian Kent
2006-09-06 9:51 ` David Howells [this message]
2006-09-06 12:46 ` Trond Myklebust
2006-09-06 13:24 ` David Howells
2006-09-07 5:30 ` Ian Kent
2006-09-07 6:17 ` Trond Myklebust
2006-09-07 7:40 ` Ian Kent
2006-09-05 9:48 ` David Howells
2006-09-05 10:14 ` Ian Kent
2006-09-05 9:57 ` David Howells
2006-09-05 12:47 ` Trond Myklebust
2006-09-05 12:53 ` Trond Myklebust
2006-09-05 13:40 ` David Howells
2006-09-06 10:27 ` Ian Kent
2006-09-04 13:46 ` David Howells
2006-09-04 15:00 ` Ian Kent
2006-09-05 4:11 ` Ian Kent
2006-09-05 4:17 ` Trond Myklebust
2006-09-05 2:23 ` Trond Myklebust
2006-09-05 3:01 ` Ian Kent
2006-09-05 4:05 ` Trond Myklebust
2006-09-05 4:06 ` Ian Kent
2006-09-05 4:57 ` Trond Myklebust
2006-09-05 6:45 ` Ian Kent
2006-09-05 7:07 ` Ian Kent
2006-09-04 18:20 ` David Howells
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