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1da177e4 LT |
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, | |
96de0e25 | 4 | * Copyright (C) 1997 Martin von Löwis, Régis Duchesne |
1da177e4 | 5 | * |
c002f425 | 6 | * Copyright (c) 2002-2005 Anton Altaparmakov |
1da177e4 LT |
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 | ||
1da177e4 LT |
36 | /* Definition of the ntfs sysctl. */ |
37 | static ctl_table ntfs_sysctls[] = { | |
4ed075e9 EB |
38 | { |
39 | .ctl_name = CTL_UNNUMBERED, /* Binary and text IDs. */ | |
40 | .procname = "ntfs-debug", | |
41 | .data = &debug_msgs, /* Data pointer and size. */ | |
42 | .maxlen = sizeof(debug_msgs), | |
43 | .mode = 0644, /* Mode, proc handler. */ | |
44 | .proc_handler = &proc_dointvec | |
45 | }, | |
46 | {} | |
1da177e4 LT |
47 | }; |
48 | ||
49 | /* Define the parent directory /proc/sys/fs. */ | |
50 | static ctl_table sysctls_root[] = { | |
4ed075e9 EB |
51 | { |
52 | .ctl_name = CTL_FS, | |
53 | .procname = "fs", | |
54 | .mode = 0555, | |
55 | .child = ntfs_sysctls | |
56 | }, | |
57 | {} | |
1da177e4 LT |
58 | }; |
59 | ||
60 | /* Storage for the sysctls header. */ | |
61 | static struct ctl_table_header *sysctls_root_table = NULL; | |
62 | ||
63 | /** | |
64 | * ntfs_sysctl - add or remove the debug sysctl | |
65 | * @add: add (1) or remove (0) the sysctl | |
66 | * | |
67 | * Add or remove the debug sysctl. Return 0 on success or -errno on error. | |
68 | */ | |
69 | int ntfs_sysctl(int add) | |
70 | { | |
71 | if (add) { | |
72 | BUG_ON(sysctls_root_table); | |
0b4d4147 | 73 | sysctls_root_table = register_sysctl_table(sysctls_root); |
1da177e4 LT |
74 | if (!sysctls_root_table) |
75 | return -ENOMEM; | |
1da177e4 LT |
76 | } else { |
77 | BUG_ON(!sysctls_root_table); | |
78 | unregister_sysctl_table(sysctls_root_table); | |
79 | sysctls_root_table = NULL; | |
80 | } | |
81 | return 0; | |
82 | } | |
83 | ||
84 | #endif /* CONFIG_SYSCTL */ | |
85 | #endif /* DEBUG */ |