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 */
110