1 files changed, 85 insertions, 0 deletions

diff --git a/fs/ntfs/sysctl.c b/fs/ntfs/sysctl.c
new file mode 100644
index 000000000000..75067e4f3036
--- /dev/null
+++ b/fs/ntfs/sysctl.c
@@ -0,0 +1,85 @@
+/*
+ * 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 */