fs/nfs/sysctl.c

   1 /*
   2  * linux/fs/nfs/sysctl.c
   3  *
   4  * Sysctl interface to NFS parameters
   5  */
   6 #include <linux/types.h>
   7 #include <linux/linkage.h>
   8 #include <linux/ctype.h>
   9 #include <linux/fs.h>
  10 #include <linux/sysctl.h>
  11 #include <linux/module.h>
  12 #include <linux/nfs_fs.h>
  13
  14 static struct ctl_table_header *nfs_callback_sysctl_table;
  15
  16 static ctl_table nfs_cb_sysctls[] = {
  17         {
  18                 .procname       = "nfs_mountpoint_timeout",
  19                 .data           = &nfs_mountpoint_expiry_timeout,
  20                 .maxlen         = sizeof(nfs_mountpoint_expiry_timeout),
  21                 .mode           = 0644,
  22                 .proc_handler   = proc_dointvec_jiffies,
  23         },
  24         {
  25                 .procname       = "nfs_congestion_kb",
  26                 .data           = &nfs_congestion_kb,
  27                 .maxlen         = sizeof(nfs_congestion_kb),
  28                 .mode           = 0644,
  29                 .proc_handler   = proc_dointvec,
  30         },
  31         { }
  32 };
  33
  34 static ctl_table nfs_cb_sysctl_dir[] = {
  35         {
  36                 .procname = "nfs",
  37                 .mode = 0555,
  38                 .child = nfs_cb_sysctls,
  39         },
  40         { }
  41 };
  42
  43 static ctl_table nfs_cb_sysctl_root[] = {
  44         {
  45                 .procname = "fs",
  46                 .mode = 0555,
  47                 .child = nfs_cb_sysctl_dir,
  48         },
  49         { }
  50 };
  51
  52 int nfs_register_sysctl(void)
  53 {
  54         nfs_callback_sysctl_table = register_sysctl_table(nfs_cb_sysctl_root);
  55         if (nfs_callback_sysctl_table == NULL)
  56                 return -ENOMEM;
  57         return 0;
  58 }
  59
  60 void nfs_unregister_sysctl(void)
  61 {
  62         unregister_sysctl_table(nfs_callback_sysctl_table);
  63         nfs_callback_sysctl_table = NULL;
  64 }