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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Dave Kleikamp63f83c92006-10-02 09:55:27 -05007 * the Free Software Foundation; either version 2 of the License, or
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 * (at your option) any later version.
Dave Kleikamp63f83c92006-10-02 09:55:27 -05009 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * 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
Dave Kleikamp63f83c92006-10-02 09:55:27 -050016 * along with this program; if not, write to the Free Software
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 * 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>
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -050024#include <linux/seq_file.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <asm/uaccess.h>
26#include "jfs_incore.h"
27#include "jfs_filsys.h"
28#include "jfs_debug.h"
29
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#ifdef PROC_FS_JFS /* see jfs_debug.h */
31
32static struct proc_dir_entry *base;
33#ifdef CONFIG_JFS_DEBUG
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -050034static int jfs_loglevel_proc_show(struct seq_file *m, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -070035{
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -050036 seq_printf(m, "%d\n", jfsloglevel);
37 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070038}
39
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -050040static 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)
Linus Torvalds1da177e2005-04-16 15:20:36 -070047{
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}
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -050059
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};
Linus Torvalds1da177e2005-04-16 15:20:36 -070068#endif
69
Linus Torvalds1da177e2005-04-16 15:20:36 -070070static struct {
71 const char *name;
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -050072 const struct file_operations *proc_fops;
Linus Torvalds1da177e2005-04-16 15:20:36 -070073} Entries[] = {
74#ifdef CONFIG_JFS_STATISTICS
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -050075 { "lmstats", &jfs_lmstats_proc_fops, },
76 { "txstats", &jfs_txstats_proc_fops, },
77 { "xtstat", &jfs_xtstat_proc_fops, },
78 { "mpstat", &jfs_mpstat_proc_fops, },
Linus Torvalds1da177e2005-04-16 15:20:36 -070079#endif
80#ifdef CONFIG_JFS_DEBUG
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -050081 { "TxAnchor", &jfs_txanchor_proc_fops, },
82 { "loglevel", &jfs_loglevel_proc_fops }
Linus Torvalds1da177e2005-04-16 15:20:36 -070083#endif
84};
Tobias Klausere8c96f82006-03-24 03:15:34 -080085#define NPROCENT ARRAY_SIZE(Entries)
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
87void jfs_proc_init(void)
88{
89 int i;
90
Alexey Dobriyan36a5aeb2008-04-29 01:01:42 -070091 if (!(base = proc_mkdir("fs/jfs", NULL)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 return;
93 base->owner = THIS_MODULE;
94
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -050095 for (i = 0; i < NPROCENT; i++)
96 proc_create(Entries[i].name, 0, base, Entries[i].proc_fops);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097}
98
99void jfs_proc_clean(void)
100{
101 int i;
102
103 if (base) {
104 for (i = 0; i < NPROCENT; i++)
105 remove_proc_entry(Entries[i].name, base);
Alexey Dobriyan36a5aeb2008-04-29 01:01:42 -0700106 remove_proc_entry("fs/jfs", NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 }
108}
109
110#endif /* PROC_FS_JFS */