fs/nfs/sysctl.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * linux/fs/nfs/sysctl.c
   4  *
   5  * Sysctl interface to NFS parameters
   6  */
   7 #include <linux/types.h>
   8 #include <linux/linkage.h>
   9 #include <linux/ctype.h>
  10 #include <linux/fs.h>
  11 #include <linux/sysctl.h>
  12 #include <linux/module.h>
  13 #include <linux/nfs_fs.h>
  14
  15 static struct ctl_table_header *nfs_callback_sysctl_table;
  16
  17 static struct ctl_table nfs_cb_sysctls[] = {
  18         {
  19                 .procname       = "nfs_mountpoint_timeout",
  20                 .data           = &nfs_mountpoint_expiry_timeout,
  21                 .maxlen         = sizeof(nfs_mountpoint_expiry_timeout),
  22                 .mode           = 0644,
  23                 .proc_handler   = proc_dointvec_jiffies,
  24         },
  25         {
  26                 .procname       = "nfs_congestion_kb",
  27                 .data           = &nfs_congestion_kb,
  28                 .maxlen         = sizeof(nfs_congestion_kb),
  29                 .mode           = 0644,
  30                 .proc_handler   = proc_dointvec,
  31         },
  32 };
  33
  34 int nfs_register_sysctl(void)
  35 {
  36         nfs_callback_sysctl_table = register_sysctl("fs/nfs", nfs_cb_sysctls);
  37         if (nfs_callback_sysctl_table == NULL)
  38                 return -ENOMEM;
  39         return 0;
  40 }
  41
  42 void nfs_unregister_sysctl(void)
  43 {
  44         unregister_sysctl_table(nfs_callback_sysctl_table);
  45         nfs_callback_sysctl_table = NULL;
  46 }