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
6 * Copyright (c) 2002-2005 Anton Altaparmakov
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.
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.
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
26 #include <linux/module.h>
30 #include <linux/proc_fs.h>
31 #include <linux/sysctl.h>
36 /* Definition of the ntfs sysctl. */
37 static ctl_table ntfs_sysctls
[] = {
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
49 /* Define the parent directory /proc/sys/fs. */
50 static ctl_table sysctls_root
[] = {
60 /* Storage for the sysctls header. */
61 static struct ctl_table_header
*sysctls_root_table
= NULL
;
64 * ntfs_sysctl - add or remove the debug sysctl
65 * @add: add (1) or remove (0) the sysctl
67 * Add or remove the debug sysctl. Return 0 on success or -errno on error.
69 int ntfs_sysctl(int add
)
72 BUG_ON(sysctls_root_table
);
73 sysctls_root_table
= register_sysctl_table(sysctls_root
);
74 if (!sysctls_root_table
)
77 BUG_ON(!sysctls_root_table
);
78 unregister_sysctl_table(sysctls_root_table
);
79 sysctls_root_table
= NULL
;
84 #endif /* CONFIG_SYSCTL */
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