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/fs/jfs/jfs_debug.c

https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t
C | 109 lines | 75 code | 15 blank | 19 comment | 7 complexity | 4e8044389c873e62f8892e657707523d MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
  1/*
  2 *   Copyright (C) International Business Machines Corp., 2000-2004
  3 *   Portions Copyright (C) Christoph Hellwig, 2001-2002
  4 *
  5 *   This program is free software;  you can redistribute it and/or modify
  6 *   it under the terms of the GNU General Public License as published by
  7 *   the Free Software Foundation; either version 2 of the License, or
  8 *   (at your option) any later version.
  9 *
 10 *   This program is distributed in the hope that it will be useful,
 11 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
 12 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 13 *   the GNU General Public License for more details.
 14 *
 15 *   You should have received a copy of the GNU General Public License
 16 *   along with this program;  if not, write to the Free Software
 17 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 18 */
 19
 20#include <linux/fs.h>
 21#include <linux/ctype.h>
 22#include <linux/module.h>
 23#include <linux/proc_fs.h>
 24#include <linux/seq_file.h>
 25#include <asm/uaccess.h>
 26#include "jfs_incore.h"
 27#include "jfs_filsys.h"
 28#include "jfs_debug.h"
 29
 30#ifdef PROC_FS_JFS /* see jfs_debug.h */
 31
 32static struct proc_dir_entry *base;
 33#ifdef CONFIG_JFS_DEBUG
 34static int jfs_loglevel_proc_show(struct seq_file *m, void *v)
 35{
 36	seq_printf(m, "%d\n", jfsloglevel);
 37	return 0;
 38}
 39
 40static int jfs_loglevel_proc_open(struct inode *inode, struct file *file)
 41{
 42	return single_open(file, jfs_loglevel_proc_show, NULL);
 43}
 44
 45static ssize_t jfs_loglevel_proc_write(struct file *file,
 46		const char __user *buffer, size_t count, loff_t *ppos)
 47{
 48	char c;
 49
 50	if (get_user(c, buffer))
 51		return -EFAULT;
 52
 53	/* yes, I know this is an ASCIIism.  --hch */
 54	if (c < '0' || c > '9')
 55		return -EINVAL;
 56	jfsloglevel = c - '0';
 57	return count;
 58}
 59
 60static const struct file_operations jfs_loglevel_proc_fops = {
 61	.owner		= THIS_MODULE,
 62	.open		= jfs_loglevel_proc_open,
 63	.read		= seq_read,
 64	.llseek		= seq_lseek,
 65	.release	= single_release,
 66	.write		= jfs_loglevel_proc_write,
 67};
 68#endif
 69
 70static struct {
 71	const char	*name;
 72	const struct file_operations *proc_fops;
 73} Entries[] = {
 74#ifdef CONFIG_JFS_STATISTICS
 75	{ "lmstats",	&jfs_lmstats_proc_fops, },
 76	{ "txstats",	&jfs_txstats_proc_fops, },
 77	{ "xtstat",	&jfs_xtstat_proc_fops, },
 78	{ "mpstat",	&jfs_mpstat_proc_fops, },
 79#endif
 80#ifdef CONFIG_JFS_DEBUG
 81	{ "TxAnchor",	&jfs_txanchor_proc_fops, },
 82	{ "loglevel",	&jfs_loglevel_proc_fops }
 83#endif
 84};
 85#define NPROCENT	ARRAY_SIZE(Entries)
 86
 87void jfs_proc_init(void)
 88{
 89	int i;
 90
 91	if (!(base = proc_mkdir("fs/jfs", NULL)))
 92		return;
 93
 94	for (i = 0; i < NPROCENT; i++)
 95		proc_create(Entries[i].name, 0, base, Entries[i].proc_fops);
 96}
 97
 98void jfs_proc_clean(void)
 99{
100	int i;
101
102	if (base) {
103		for (i = 0; i < NPROCENT; i++)
104			remove_proc_entry(Entries[i].name, base);
105		remove_proc_entry("fs/jfs", NULL);
106	}
107}
108
109#endif /* PROC_FS_JFS */