From: Menyhart Zoltan <Zoltan.Menyhart@bull.net>
Date: Sun, 12 Sep 2010 23:55:26 +0000 (-0400)
Subject: statfs() gives ESTALE error
X-Git-Tag: v2.6.36-rc5~36^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fbf3fdd2443965d9ba6fb4b5fecd1f6e0847218f;p=pandora-kernel.git

statfs() gives ESTALE error

Hi,

An NFS client executes a statfs("file", &buff) call.
"file" exists / existed, the client has read / written it,
but it has already closed it.

user_path(pathname, &path) looks up "file" successfully in the
directory-cache  and restarts the aging timer of the directory-entry.
Even if "file" has already been removed from the server, because the
lookupcache=positive option I use, keeps the entries valid for a while.

nfs_statfs() returns ESTALE if "file" has already been removed from the
server.

If the user application repeats the statfs("file", &buff) call, we
are stuck: "file" remains young forever in the directory-cache.

Signed-off-by: Zoltan Menyhart  <Zoltan.Menyhart@bull.net>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org
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