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
nfs4_register_sysctl(void)39 int nfs4_register_sysctl(void)
40 {
41 nfs4_callback_sysctl_table = register_sysctl("fs/nfs",
42 nfs4_cb_sysctls);
43 if (nfs4_callback_sysctl_table == NULL)
44 return -ENOMEM;
45 return 0;
46 }
47
nfs4_unregister_sysctl(void)48 void nfs4_unregister_sysctl(void)
49 {
50 unregister_sysctl_table(nfs4_callback_sysctl_table);
51 nfs4_callback_sysctl_table = NULL;
52 }
53