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 "nfs4_fs.h"
  13 #include "callback.h"
  14
  15 static const int nfs_set_port_min = 0;
  16 static const int nfs_set_port_max = 65535;
  17 static struct ctl_table_header *nfs4_callback_sysctl_table;
  18
  19 static ctl_table nfs4_cb_sysctls[] = {
  20         {
  21                 .procname = "nfs_callback_tcpport",
  22                 .data = &nfs_callback_set_tcpport,
  23                 .maxlen = sizeof(int),
  24                 .mode = 0644,
  25                 .proc_handler = proc_dointvec_minmax,
  26                 .extra1 = (int *)&nfs_set_port_min,
  27                 .extra2 = (int *)&nfs_set_port_max,
  28         },
  29         {
  30                 .procname = "idmap_cache_timeout",
  31                 .data = &nfs_idmap_cache_timeout,
  32                 .maxlen = sizeof(int),
  33                 .mode = 0644,
  34                 .proc_handler = proc_dointvec_jiffies,
  35         },
  36         { }
  37 };
  38
  39 static ctl_table nfs4_cb_sysctl_dir[] = {
  40         {
  41                 .procname = "nfs",
  42                 .mode = 0555,
  43                 .child = nfs4_cb_sysctls,
  44         },
  45         { }
  46 };
  47
  48 static ctl_table nfs4_cb_sysctl_root[] = {
  49         {
  50                 .procname = "fs",
  51                 .mode = 0555,
  52                 .child = nfs4_cb_sysctl_dir,
  53         },
  54         { }
  55 };
  56
  57 int nfs4_register_sysctl(void)
  58 {
  59         nfs4_callback_sysctl_table = register_sysctl_table(nfs4_cb_sysctl_root);
  60         if (nfs4_callback_sysctl_table == NULL)
  61                 return -ENOMEM;
  62         return 0;
  63 }
  64
  65 void nfs4_unregister_sysctl(void)
  66 {
  67         unregister_sysctl_table(nfs4_callback_sysctl_table);
  68         nfs4_callback_sysctl_table = NULL;
  69 }