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
nfs4_register_sysctl(void)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
nfs4_unregister_sysctl(void)66 void nfs4_unregister_sysctl(void)
67 {
68 unregister_sysctl_table(nfs4_callback_sysctl_table);
69 nfs4_callback_sysctl_table = NULL;
70 }
71