tree 55e1b68c3304b35e8c7e8d1f0de54521189908b9
parent b20d37ca9561711c6a3c4b859c2855f49565e061
author Menyhart Zoltan <Zoltan.Menyhart@bull.net> 1284335726 -0400
committer Trond Myklebust <Trond.Myklebust@netapp.com> 1284335726 -0400

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