diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/nfs/nfs4renewd.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/nfs/nfs4renewd.c | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/ANDROID_3.4.5/fs/nfs/nfs4renewd.c b/ANDROID_3.4.5/fs/nfs/nfs4renewd.c deleted file mode 100644 index dc484c0e..00000000 --- a/ANDROID_3.4.5/fs/nfs/nfs4renewd.c +++ /dev/null @@ -1,136 +0,0 @@ -/* - * 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_PROC - -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); - struct rpc_cred *cred; - long lease; - unsigned long last, now; - unsigned renew_flags = 0; - - ops = clp->cl_mvops->state_renewal_ops; - dprintk("%s: start\n", __func__); - - if (test_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state)) - goto out; - - spin_lock(&clp->cl_lock); - lease = clp->cl_lease_time; - last = clp->cl_last_renewal; - now = jiffies; - /* Are we close to a lease timeout? */ - if (time_after(now, last + lease/3)) - renew_flags |= NFS4_RENEW_TIMEOUT; - if (nfs_delegations_present(clp)) - renew_flags |= NFS4_RENEW_DELEGATION_CB; - - if (renew_flags != 0) { - cred = ops->get_state_renewal_cred_locked(clp); - spin_unlock(&clp->cl_lock); - if (cred == NULL) { - if (!(renew_flags & NFS4_RENEW_DELEGATION_CB)) { - set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); - goto out; - } - nfs_expire_all_delegations(clp); - } else { - /* Queue an asynchronous RENEW. */ - ops->sched_state_renewal(clp, cred, renew_flags); - put_rpccred(cred); - goto out_exp; - } - } else { - dprintk("%s: failed to call renewd. Reason: lease not expired \n", - __func__); - spin_unlock(&clp->cl_lock); - } - nfs4_schedule_state_renewal(clp); -out_exp: - nfs_expire_unreferenced_delegations(clp); -out: - dprintk("%s: done\n", __func__); -} - -void -nfs4_schedule_state_renewal(struct nfs_client *clp) -{ - long timeout; - - spin_lock(&clp->cl_lock); - timeout = (2 * clp->cl_lease_time) / 3 + (long)clp->cl_last_renewal - - (long)jiffies; - if (timeout < 5 * HZ) - timeout = 5 * HZ; - dprintk("%s: requeueing work. Lease period = %ld\n", - __func__, (timeout + HZ - 1) / HZ); - cancel_delayed_work(&clp->cl_renewd); - schedule_delayed_work(&clp->cl_renewd, timeout); - set_bit(NFS_CS_RENEWD, &clp->cl_res_state); - spin_unlock(&clp->cl_lock); -} - -void -nfs4_kill_renewd(struct nfs_client *clp) -{ - cancel_delayed_work_sync(&clp->cl_renewd); -} - -/* - * Local variables: - * c-basic-offset: 8 - * End: - */ |