// SPDX-License-Identifier: GPL-2.0
/*
 * linux/fs/nfs/nfs4sysctl.c
 *
 * Sysctl interface to NFS v4 parameters
 *
 * Copyright (c) 2006 Trond Myklebust <Trond.Myklebust@netapp.com>
 */
#include <linux/sysctl.h>
#include <linux/nfs_fs.h>

#include "nfs4_fs.h"
#include "nfs4idmap.h"
#include "callback.h"

static const int nfs_set_port_min;
static const int nfs_set_port_max = 65535;
static struct ctl_table_header *nfs4_callback_sysctl_table;

static const struct ctl_table nfs4_cb_sysctls[] = {
        {
                .procname = "nfs_callback_tcpport",
                .data = &nfs_callback_set_tcpport,
                .maxlen = sizeof(int),
                .mode = 0644,
                .proc_handler = proc_dointvec_minmax,
                .extra1 = (int *)&nfs_set_port_min,
                .extra2 = (int *)&nfs_set_port_max,
        },
        {
                .procname = "idmap_cache_timeout",
                .data = &nfs_idmap_cache_timeout,
                .maxlen = sizeof(int),
                .mode = 0644,
                .proc_handler = proc_dointvec,
        },
};

int nfs4_register_sysctl(void)
{
        nfs4_callback_sysctl_table = register_sysctl("fs/nfs",
                                                     nfs4_cb_sysctls);
        if (nfs4_callback_sysctl_table == NULL)
                return -ENOMEM;
        return 0;
}

void nfs4_unregister_sysctl(void)
{
        unregister_sysctl_table(nfs4_callback_sysctl_table);
        nfs4_callback_sysctl_table = NULL;
}