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 <asm/uaccess.h>
25#include "jfs_incore.h"
26#include "jfs_filsys.h"
27#include "jfs_debug.h"
28
29#ifdef CONFIG_JFS_DEBUG
30void dump_mem(char *label, void *data, int length)
31{
32	int i, j;
33	int *intptr = data;
34	char *charptr = data;
35	char buf[10], line[80];
36
37	printk("%s: dump of %d bytes of data at 0x%p\n\n", label, length,
38	       data);
39	for (i = 0; i < length; i += 16) {
40		line[0] = 0;
41		for (j = 0; (j < 4) && (i + j * 4 < length); j++) {
42			sprintf(buf, " %08x", intptr[i / 4 + j]);
43			strcat(line, buf);
44		}
45		buf[0] = ' ';
46		buf[2] = 0;
47		for (j = 0; (j < 16) && (i + j < length); j++) {
48			buf[1] =
49			    isprint(charptr[i + j]) ? charptr[i + j] : '.';
50			strcat(line, buf);
51		}
52		printk("%s\n", line);
53	}
54}
55#endif
56
57#ifdef PROC_FS_JFS     /* see jfs_debug.h */
58
59static struct proc_dir_entry *base;
60#ifdef CONFIG_JFS_DEBUG
61static int loglevel_read(char *page, char **start, off_t off,
62			 int count, int *eof, void *data)
63{
64	int len;
65
66	len = sprintf(page, "%d\n", jfsloglevel);
67
68	len -= off;
69	*start = page + off;
70
71	if (len > count)
72		len = count;
73	else
74		*eof = 1;
75
76	if (len < 0)
77		len = 0;
78
79	return len;
80}
81
82static int loglevel_write(struct file *file, const char __user *buffer,
83			unsigned long count, void *data)
84{
85	char c;
86
87	if (get_user(c, buffer))
88		return -EFAULT;
89
90	/* yes, I know this is an ASCIIism.  --hch */
91	if (c < '0' || c > '9')
92		return -EINVAL;
93	jfsloglevel = c - '0';
94	return count;
95}
96#endif
97
98static struct {
99	const char	*name;
100	read_proc_t	*read_fn;
101	write_proc_t	*write_fn;
102} Entries[] = {
103#ifdef CONFIG_JFS_STATISTICS
104	{ "lmstats",	jfs_lmstats_read, },
105	{ "txstats",	jfs_txstats_read, },
106	{ "xtstat",	jfs_xtstat_read, },
107	{ "mpstat",	jfs_mpstat_read, },
108#endif
109#ifdef CONFIG_JFS_DEBUG
110	{ "TxAnchor",	jfs_txanchor_read, },
111	{ "loglevel",	loglevel_read, loglevel_write }
112#endif
113};
114#define NPROCENT	ARRAY_SIZE(Entries)
115
116void jfs_proc_init(void)
117{
118	int i;
119
120	if (!(base = proc_mkdir("jfs", proc_root_fs)))
121		return;
122	base->owner = THIS_MODULE;
123
124	for (i = 0; i < NPROCENT; i++) {
125		struct proc_dir_entry *p;
126		if ((p = create_proc_entry(Entries[i].name, 0, base))) {
127			p->read_proc = Entries[i].read_fn;
128			p->write_proc = Entries[i].write_fn;
129		}
130	}
131}
132
133void jfs_proc_clean(void)
134{
135	int i;
136
137	if (base) {
138		for (i = 0; i < NPROCENT; i++)
139			remove_proc_entry(Entries[i].name, base);
140		remove_proc_entry("jfs", proc_root_fs);
141	}
142}
143
144#endif /* PROC_FS_JFS */
145