fs/nfs/nfs4sysctl.c

   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
  14 static const int nfs_set_port_min = 0;
  15 static const int nfs_set_port_max = 65535;
  16 static struct ctl_table_header *nfs4_callback_sysctl_table;
  17
  18 static 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
  38 static ctl_table nfs4_cb_sysctl_dir[] = {
  39         {
  40                 .procname = "nfs",
  41                 .mode = 0555,
  42                 .child = nfs4_cb_sysctls,
  43         },
  44         { }
  45 };
  46
  47 static ctl_table nfs4_cb_sysctl_root[] = {
  48         {
  49                 .procname = "fs",
  50                 .mode = 0555,
  51                 .child = nfs4_cb_sysctl_dir,
  52         },
  53         { }
  54 };
  55
  56 int 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
  64 void nfs4_unregister_sysctl(void)
  65 {
  66         unregister_sysctl_table(nfs4_callback_sysctl_table);
  67         nfs4_callback_sysctl_table = NULL;
  68 }