tools headers UAPI: Sync openat2.h with the kernel sources
[linux-2.6-microblaze.git] / fs / nfs / nfs4sysctl.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * linux/fs/nfs/nfs4sysctl.c
4  *
5  * Sysctl interface to NFS v4 parameters
6  *
7  * Copyright (c) 2006 Trond Myklebust <Trond.Myklebust@netapp.com>
8  */
9 #include <linux/sysctl.h>
10 #include <linux/nfs_fs.h>
11
12 #include "nfs4_fs.h"
13 #include "nfs4idmap.h"
14 #include "callback.h"
15
16 static const int nfs_set_port_min;
17 static const int nfs_set_port_max = 65535;
18 static struct ctl_table_header *nfs4_callback_sysctl_table;
19
20 static struct ctl_table nfs4_cb_sysctls[] = {
21         {
22                 .procname = "nfs_callback_tcpport",
23                 .data = &nfs_callback_set_tcpport,
24                 .maxlen = sizeof(int),
25                 .mode = 0644,
26                 .proc_handler = proc_dointvec_minmax,
27                 .extra1 = (int *)&nfs_set_port_min,
28                 .extra2 = (int *)&nfs_set_port_max,
29         },
30         {
31                 .procname = "idmap_cache_timeout",
32                 .data = &nfs_idmap_cache_timeout,
33                 .maxlen = sizeof(int),
34                 .mode = 0644,
35                 .proc_handler = proc_dointvec,
36         },
37         { }
38 };
39
40 static struct ctl_table nfs4_cb_sysctl_dir[] = {
41         {
42                 .procname = "nfs",
43                 .mode = 0555,
44                 .child = nfs4_cb_sysctls,
45         },
46         { }
47 };
48
49 static struct ctl_table nfs4_cb_sysctl_root[] = {
50         {
51                 .procname = "fs",
52                 .mode = 0555,
53                 .child = nfs4_cb_sysctl_dir,
54         },
55         { }
56 };
57
58 int nfs4_register_sysctl(void)
59 {
60         nfs4_callback_sysctl_table = register_sysctl_table(nfs4_cb_sysctl_root);
61         if (nfs4_callback_sysctl_table == NULL)
62                 return -ENOMEM;
63         return 0;
64 }
65
66 void nfs4_unregister_sysctl(void)
67 {
68         unregister_sysctl_table(nfs4_callback_sysctl_table);
69         nfs4_callback_sysctl_table = NULL;
70 }