Esempio n. 1
0
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__);
}
Esempio n. 2
0
void
nfs4_renew_state(struct work_struct *work)
{
	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, timeout;
	unsigned long last, now;

	ops = nfs4_state_renewal_ops[clp->cl_minorversion];
	dprintk("%s: start\n", __func__);
	/* Are there any active superblocks? */
	if (list_empty(&clp->cl_superblocks))
		goto out;
	spin_lock(&clp->cl_lock);
	lease = clp->cl_lease_time;
	last = clp->cl_last_renewal;
	now = jiffies;
	timeout = (2 * lease) / 3 + (long)last - (long)now;
	/* Are we close to a lease timeout? */
	if (time_after(now, last + lease/3)) {
		cred = ops->get_state_renewal_cred_locked(clp);
		spin_unlock(&clp->cl_lock);
		if (cred == NULL) {
			if (list_empty(&clp->cl_delegations)) {
				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);
			put_rpccred(cred);
		}
		timeout = (2 * lease) / 3;
		spin_lock(&clp->cl_lock);
	} else
		dprintk("%s: failed to call renewd. Reason: lease not expired \n",
				__func__);
	if (timeout < 5 * HZ)    /* safeguard */
		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);
	spin_unlock(&clp->cl_lock);
	nfs_expire_unreferenced_delegations(clp);
out:
	dprintk("%s: done\n", __func__);
}
Esempio n. 3
0
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;

	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)) {
		cred = ops->get_state_renewal_cred_locked(clp);
		spin_unlock(&clp->cl_lock);
		if (cred == NULL) {
			if (list_empty(&clp->cl_delegations)) {
				set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
				goto out;
			}
			nfs_expire_all_delegations(clp);
		} else {
			struct ve_struct *ve;
			/* Queue an asynchronous RENEW. */
			ve = set_exec_env(clp->cl_rpcclient->cl_xprt->owner_env);
			ops->sched_state_renewal(clp, cred);
			(void)set_exec_env(ve);
			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__);
}
Esempio n. 4
0
void
nfs4_renew_state(void *data)
{
	struct nfs4_client *clp = (struct nfs4_client *)data;
	struct rpc_cred *cred;
	long lease, timeout;
	unsigned long last, now;

	down_read(&clp->cl_sem);
	dprintk("%s: start\n", __FUNCTION__);
	/* Are there any active superblocks? */
	if (list_empty(&clp->cl_superblocks))
		goto out;
	spin_lock(&clp->cl_lock);
	lease = clp->cl_lease_time;
	last = clp->cl_last_renewal;
	now = jiffies;
	timeout = (2 * lease) / 3 + (long)last - (long)now;
	/* Are we close to a lease timeout? */
	if (time_after(now, last + lease/3)) {
		cred = nfs4_get_renew_cred(clp);
		if (cred == NULL) {
			set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
			spin_unlock(&clp->cl_lock);
			nfs_expire_all_delegations(clp);
			goto out;
		}
		spin_unlock(&clp->cl_lock);
		/* Queue an asynchronous RENEW. */
		nfs4_proc_async_renew(clp, cred);
		put_rpccred(cred);
		timeout = (2 * lease) / 3;
		spin_lock(&clp->cl_lock);
	} else
		dprintk("%s: failed to call renewd. Reason: lease not expired \n",
				__FUNCTION__);
	if (timeout < 5 * HZ)    /* safeguard */
		timeout = 5 * HZ;
	dprintk("%s: requeueing work. Lease period = %ld\n",
			__FUNCTION__, (timeout + HZ - 1) / HZ);
	cancel_delayed_work(&clp->cl_renewd);
	schedule_delayed_work(&clp->cl_renewd, timeout);
	spin_unlock(&clp->cl_lock);
out:
	up_read(&clp->cl_sem);
	dprintk("%s: done\n", __FUNCTION__);
}