nfs4sysctl.c

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/*
 * linux/fs/nfs/nfs4sysctl.c
 *
 * Sysctl interface to NFS v4 parameters
 *
 * Copyright (c) 2006 Trond Myklebust <[email protected]>
 */
#include <linux/sysctl.h>
#include <linux/nfs_idmap.h>
#include <linux/nfs_fs.h>

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

static const int nfs_set_port_min = 0;
static const int nfs_set_port_max = 65535;
static struct ctl_table_header *nfs4_callback_sysctl_table;

static 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_jiffies,
    },
    { }
};

static ctl_table nfs4_cb_sysctl_dir[] = {
    {
        .procname = "nfs",
        .mode = 0555,
        .child = nfs4_cb_sysctls,
    },
    { }
};

static ctl_table nfs4_cb_sysctl_root[] = {
    {
        .procname = "fs",
        .mode = 0555,
        .child = nfs4_cb_sysctl_dir,
    },
    { }
};

int nfs4_register_sysctl(void)
{
    nfs4_callback_sysctl_table = register_sysctl_table(nfs4_cb_sysctl_root);
    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;
}