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/*
* Copyright (C) International Business Machines Corp., 2000-2004
* Portions Copyright (C) Christoph Hellwig, 2001-2002
*
* This program 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 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; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/fs.h>
#include <linux/ctype.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <asm/uaccess.h>
#include "jfs_incore.h"
#include "jfs_filsys.h"
#include "jfs_debug.h"
#ifdef PROC_FS_JFS /* see jfs_debug.h */
static struct proc_dir_entry *base;
#ifdef CONFIG_JFS_DEBUG
static int loglevel_read(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
int len;
len = sprintf(page, "%d\n", jfsloglevel);
len -= off;
*start = page + off;
if (len > count)
len = count;
else
*eof = 1;
if (len < 0)
len = 0;
return len;
}
static int loglevel_write(struct file *file, const char __user *buffer,
unsigned long count, void *data)
{
char c;
if (get_user(c, buffer))
return -EFAULT;
/* yes, I know this is an ASCIIism. --hch */
if (c < '0' || c > '9')
return -EINVAL;
jfsloglevel = c - '0';
return count;
}
#endif
static struct {
const char *name;
read_proc_t *read_fn;
write_proc_t *write_fn;
} Entries[] = {
#ifdef CONFIG_JFS_STATISTICS
{ "lmstats", jfs_lmstats_read, },
{ "txstats", jfs_txstats_read, },
{ "xtstat", jfs_xtstat_read, },
{ "mpstat", jfs_mpstat_read, },
#endif
#ifdef CONFIG_JFS_DEBUG
{ "TxAnchor", jfs_txanchor_read, },
{ "loglevel", loglevel_read, loglevel_write }
#endif
};
#define NPROCENT ARRAY_SIZE(Entries)
void jfs_proc_init(void)
{
int i;
if (!(base = proc_mkdir("fs/jfs", NULL)))
return;
base->owner = THIS_MODULE;
for (i = 0; i < NPROCENT; i++) {
struct proc_dir_entry *p;
if ((p = create_proc_entry(Entries[i].name, 0, base))) {
p->read_proc = Entries[i].read_fn;
p->write_proc = Entries[i].write_fn;
}
}
}
void jfs_proc_clean(void)
{
int i;
if (base) {
for (i = 0; i < NPROCENT; i++)
remove_proc_entry(Entries[i].name, base);
remove_proc_entry("fs/jfs", NULL);
}
}
#endif /* PROC_FS_JFS */
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