linux-imx

/*

 *  fs/nfs/nfs4renewd.c

 *

 *  Copyright (c) 2002 The Regents of the University of Michigan.

 *  All rights reserved.

 *

 *  Kendrick Smith <kmsmith@umich.edu>

 *

 *  Redistribution and use in source and binary forms, with or without

 *  modification, are permitted provided that the following conditions

 *  are met:

 *

 *  1. Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer.

 *  2. Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution.

 *  3. Neither the name of the University nor the names of its

 *     contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission.

 *

 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED

 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR

 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *

 * Implementation of the NFSv4 "renew daemon", which wakes up periodically to

 * send a RENEW, to keep state alive on the server.  The daemon is implemented

 * as an rpc_task, not a real kernel thread, so it always runs in rpciod's

 * context.  There is one renewd per nfs_server.

 *

 */

​

#include <linux/mm.h>

#include <linux/pagemap.h>

#include <linux/sunrpc/sched.h>

#include <linux/sunrpc/clnt.h>

​

#include <linux/nfs.h>

#include <linux/nfs4.h>

#include <linux/nfs_fs.h>

#include "nfs4_fs.h"

#include "delegation.h"

​

#define NFSDBG_FACILITY     NFSDBG_STATE

​

void

nfs4_renew_state(struct work_struct *work)

{

    const struct nfs4_state_maintenance_ops *ops;

    struct nfs_client *clp =

        container_of(work, struct nfs_client, cl_renewd.work);

    const struct cred *cred;

    long lease;

    unsigned long last, now;

    unsigned renew_flags = 0;