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1 | /* |
2 | * sysctl.c - Code for sysctl handling in NTFS Linux kernel driver. Part of |
3 | * the Linux-NTFS project. Adapted from the old NTFS driver, |
4 | * Copyright (C) 1997 Martin von Löwis, Régis Duchesne |
5 | * |
6 | * Copyright (c) 2002-2005 Anton Altaparmakov |
7 | * |
8 | * This program/include file is free software; you can redistribute it and/or |
9 | * modify it under the terms of the GNU General Public License as published |
10 | * by the Free Software Foundation; either version 2 of the License, or |
11 | * (at your option) any later version. |
12 | * |
13 | * This program/include file is distributed in the hope that it will be |
14 | * useful, but WITHOUT ANY WARRANTY; without even the implied warranty |
15 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | * GNU General Public License for more details. |
17 | * |
18 | * You should have received a copy of the GNU General Public License |
19 | * along with this program (in the main directory of the Linux-NTFS |
20 | * distribution in the file COPYING); if not, write to the Free Software |
21 | * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
22 | */ |
23 | |
24 | #ifdef DEBUG |
25 | |
26 | #include <linux/module.h> |
27 | |
28 | #ifdef CONFIG_SYSCTL |
29 | |
30 | #include <linux/proc_fs.h> |
31 | #include <linux/sysctl.h> |
32 | |
33 | #include "sysctl.h" |
34 | #include "debug.h" |
35 | |
36 | /* Definition of the ntfs sysctl. */ |
37 | static ctl_table ntfs_sysctls[] = { |
38 | { |
39 | .procname = "ntfs-debug", |
40 | .data = &debug_msgs, /* Data pointer and size. */ |
41 | .maxlen = sizeof(debug_msgs), |
42 | .mode = 0644, /* Mode, proc handler. */ |
43 | .proc_handler = proc_dointvec |
44 | }, |
45 | {} |
46 | }; |
47 | |
48 | /* Define the parent directory /proc/sys/fs. */ |
49 | static ctl_table sysctls_root[] = { |
50 | { |
51 | .procname = "fs", |
52 | .mode = 0555, |
53 | .child = ntfs_sysctls |
54 | }, |
55 | {} |
56 | }; |
57 | |
58 | /* Storage for the sysctls header. */ |
59 | static struct ctl_table_header *sysctls_root_table = NULL; |
60 | |
61 | /** |
62 | * ntfs_sysctl - add or remove the debug sysctl |
63 | * @add: add (1) or remove (0) the sysctl |
64 | * |
65 | * Add or remove the debug sysctl. Return 0 on success or -errno on error. |
66 | */ |
67 | int ntfs_sysctl(int add) |
68 | { |
69 | if (add) { |
70 | BUG_ON(sysctls_root_table); |
71 | sysctls_root_table = register_sysctl_table(sysctls_root); |
72 | if (!sysctls_root_table) |
73 | return -ENOMEM; |
74 | } else { |
75 | BUG_ON(!sysctls_root_table); |
76 | unregister_sysctl_table(sysctls_root_table); |
77 | sysctls_root_table = NULL; |
78 | } |
79 | return 0; |
80 | } |
81 | |
82 | #endif /* CONFIG_SYSCTL */ |
83 | #endif /* DEBUG */ |
84 |
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