linux/fs/nfs/nfs4sysctl.c
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   1/*
   2 * linux/fs/nfs/nfs4sysctl.c
   3 *
   4 * Sysctl interface to NFS v4 parameters
   5 *
   6 * Copyright (c) 2006 Trond Myklebust <Trond.Myklebust@netapp.com>
   7 */
   8#include <linux/sysctl.h>
   9#include <linux/nfs_idmap.h>
  10#include <linux/nfs_fs.h>
  11
  12#include "callback.h"
  13
  14static const int nfs_set_port_min = 0;
  15static const int nfs_set_port_max = 65535;
  16static struct ctl_table_header *nfs4_callback_sysctl_table;
  17
  18static ctl_table nfs4_cb_sysctls[] = {
  19        {
  20                .procname = "nfs_callback_tcpport",
  21                .data = &nfs_callback_set_tcpport,
  22                .maxlen = sizeof(int),
  23                .mode = 0644,
  24                .proc_handler = proc_dointvec_minmax,
  25                .extra1 = (int *)&nfs_set_port_min,
  26                .extra2 = (int *)&nfs_set_port_max,
  27        },
  28        {
  29                .procname = "idmap_cache_timeout",
  30                .data = &nfs_idmap_cache_timeout,
  31                .maxlen = sizeof(int),
  32                .mode = 0644,
  33                .proc_handler = proc_dointvec_jiffies,
  34        },
  35        { }
  36};
  37
  38static ctl_table nfs4_cb_sysctl_dir[] = {
  39        {
  40                .procname = "nfs",
  41                .mode = 0555,
  42                .child = nfs4_cb_sysctls,
  43        },
  44        { }
  45};
  46
  47static ctl_table nfs4_cb_sysctl_root[] = {
  48        {
  49                .procname = "fs",
  50                .mode = 0555,
  51                .child = nfs4_cb_sysctl_dir,
  52        },
  53        { }
  54};
  55
  56int nfs4_register_sysctl(void)
  57{
  58        nfs4_callback_sysctl_table = register_sysctl_table(nfs4_cb_sysctl_root);
  59        if (nfs4_callback_sysctl_table == NULL)
  60                return -ENOMEM;
  61        return 0;
  62}
  63
  64void nfs4_unregister_sysctl(void)
  65{
  66        unregister_sysctl_table(nfs4_callback_sysctl_table);
  67        nfs4_callback_sysctl_table = NULL;
  68}
  69
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