4.4-stable review patch.  If anyone has any objections, please let me know.


From: Trond Myklebust <trond.mykleb...@primarydata.com>

commit b88fa69eaa8649f11828158c7b65c4bcd886ebd5 upstream.

Ensure that the client conforms to the normative behaviour described in
RFC5661 Section 12.7.2: "If a client believes its lease has expired,
it MUST NOT send I/O to the storage device until it has validated its

So ensure that we wait for the lease to be validated before using
the layout.

Signed-off-by: Trond Myklebust <trond.mykleb...@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

 fs/nfs/pnfs.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1530,6 +1530,7 @@ pnfs_update_layout(struct inode *ino,
                goto out;
+       nfs4_client_recover_expired_lease(clp);
        first = false;
        lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags);

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