/* * sysctl.c - Code for sysctl handling in NTFS Linux kernel driver. Part of * the Linux-NTFS project. Adapted from the old NTFS driver, * Copyright (C) 1997 Martin von Löwis, Régis Duchesne * * Copyright (c) 2002-2004 Anton Altaparmakov * * This program/include file is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program/include file is distributed in the hope that it will be * useful, but WITHOUT ANY WARRANTY; without even the implied warranty * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program (in the main directory of the Linux-NTFS * distribution in the file COPYING); if not, write to the Free Software * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifdef DEBUG #include <linux/module.h> #ifdef CONFIG_SYSCTL #include <linux/proc_fs.h> #include <linux/sysctl.h> #include "sysctl.h" #include "debug.h" #define FS_NTFS 1 /* Definition of the ntfs sysctl. */ static ctl_table ntfs_sysctls[] = { { FS_NTFS, "ntfs-debug", /* Binary and text IDs. */ &debug_msgs,sizeof(debug_msgs), /* Data pointer and size. */ 0644, NULL, &proc_dointvec }, /* Mode, child, proc handler. */ { 0 } }; /* Define the parent directory /proc/sys/fs. */ static ctl_table sysctls_root[] = { { CTL_FS, "fs", NULL, 0, 0555, ntfs_sysctls }, { 0 } }; /* Storage for the sysctls header. */ static struct ctl_table_header *sysctls_root_table = NULL; /** * ntfs_sysctl - add or remove the debug sysctl * @add: add (1) or remove (0) the sysctl * * Add or remove the debug sysctl. Return 0 on success or -errno on error. */ int ntfs_sysctl(int add) { if (add) { BUG_ON(sysctls_root_table); sysctls_root_table = register_sysctl_table(sysctls_root, 0); if (!sysctls_root_table) return -ENOMEM; #ifdef CONFIG_PROC_FS /* * If the proc file system is in use and we are a module, need * to set the owner of our proc entry to our module. In the * non-modular case, THIS_MODULE is NULL, so this is ok. */ ntfs_sysctls[0].de->owner = THIS_MODULE; #endif } else { BUG_ON(!sysctls_root_table); unregister_sysctl_table(sysctls_root_table); sysctls_root_table = NULL; } return 0; } #endif /* CONFIG_SYSCTL */ #endif /* DEBUG */