nfs4state.c

				continue;
			nfs4_state_mark_reclaim_nograce(clp, state);
		}
		spin_unlock(&sp->so_lock);
	}

	nfs_delegation_reap_unclaimed(clp);
}

static void nfs_delegation_clear_all(struct nfs_client *clp)
{
	nfs_delegation_mark_reclaim(clp);
	nfs_delegation_reap_unclaimed(clp);
}

static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp)
{
	nfs_delegation_clear_all(clp);
	nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce);
}

static void nfs4_state_end_reclaim_nograce(struct nfs_client *clp)
{
	clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state);
}

static void nfs4_recovery_handle_error(struct nfs_client *clp, int error)
{
	switch (error) {
		case -NFS4ERR_CB_PATH_DOWN:
			nfs_handle_cb_pathdown(clp);
			break;
		case -NFS4ERR_STALE_CLIENTID:
		case -NFS4ERR_LEASE_MOVED:
			set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
			nfs4_state_start_reclaim_reboot(clp);
			break;
		case -NFS4ERR_EXPIRED:
			set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
			nfs4_state_start_reclaim_nograce(clp);
	}
}

static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops)
{
	struct rb_node *pos;
	int status = 0;

restart:
	spin_lock(&clp->cl_lock);
	for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) {
		struct nfs4_state_owner *sp = rb_entry(pos, struct nfs4_state_owner, so_client_node);
		if (!test_and_clear_bit(ops->owner_flag_bit, &sp->so_flags))
			continue;
		atomic_inc(&sp->so_count);
		spin_unlock(&clp->cl_lock);
		status = nfs4_reclaim_open_state(sp, ops);
		if (status < 0) {
			set_bit(ops->owner_flag_bit, &sp->so_flags);
			nfs4_put_state_owner(sp);
			nfs4_recovery_handle_error(clp, status);
			return status;
		}
		nfs4_put_state_owner(sp);
		goto restart;
	}
	spin_unlock(&clp->cl_lock);
	return status;
}

static int nfs4_check_lease(struct nfs_client *clp)
{
	struct rpc_cred *cred;
	int status = -NFS4ERR_EXPIRED;

	/* Is the client already known to have an expired lease? */
	if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
		return 0;
	cred = nfs4_get_renew_cred(clp);
	if (cred == NULL) {
		cred = nfs4_get_setclientid_cred(clp);
		if (cred == NULL)
			goto out;
	}
	status = nfs4_proc_renew(clp, cred);
	put_rpccred(cred);
out:
	nfs4_recovery_handle_error(clp, status);
	return status;
}

static int nfs4_reclaim_lease(struct nfs_client *clp)
{
	struct rpc_cred *cred;
	int status = -ENOENT;

	cred = nfs4_get_setclientid_cred(clp);
	if (cred != NULL) {
		status = nfs4_init_client(clp, cred);
		put_rpccred(cred);
		/* Handle case where the user hasn't set up machine creds */
		if (status == -EACCES && cred == clp->cl_machine_cred) {
			nfs4_clear_machine_cred(clp);
			status = -EAGAIN;
		}
	}
	return status;
}

static void nfs4_state_manager(struct nfs_client *clp)
{
	int status = 0;

	/* Ensure exclusive access to NFSv4 state */
	while (!list_empty(&clp->cl_superblocks)) {
		if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) {
			/* We're going to have to re-establish a clientid */
			status = nfs4_reclaim_lease(clp);
			if (status) {
				set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
				if (status == -EAGAIN)
					continue;
				goto out_error;
			}
			clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state);
		}

		if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) {
			status = nfs4_check_lease(clp);
			if (status != 0)
				continue;
		}

		/* First recover reboot state... */
		if (test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) {
			status = nfs4_do_reclaim(clp, &nfs4_reboot_recovery_ops);
			if (status == -NFS4ERR_STALE_CLIENTID)
				continue;
			nfs4_state_end_reclaim_reboot(clp);
			continue;
		}

		/* Now recover expired state... */
		if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) {
			status = nfs4_do_reclaim(clp, &nfs4_nograce_recovery_ops);
			if (status < 0) {
				set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state);
				if (status == -NFS4ERR_STALE_CLIENTID)
					continue;
				if (status == -NFS4ERR_EXPIRED)
					continue;
				goto out_error;
			} else
				nfs4_state_end_reclaim_nograce(clp);
			continue;
		}

		if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) {
			nfs_client_return_marked_delegations(clp);
			continue;
		}

		nfs4_clear_state_manager_bit(clp);
		break;
	}
	return;
out_error:
	printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s"
			" with error %d\n", clp->cl_hostname, -status);
	if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state))
		nfs4_state_end_reclaim_reboot(clp);
	nfs4_clear_state_manager_bit(clp);
}

static int nfs4_run_state_manager(void *ptr)
{
	struct nfs_client *clp = ptr;

	allow_signal(SIGKILL);
	nfs4_state_manager(clp);
	nfs_put_client(clp);
	module_put_and_exit(0);
	return 0;
}

/*
 * Local variables:
 *  c-basic-offset: 8
 * End:
 */