117 строки
2.7 KiB
C
117 строки
2.7 KiB
C
/*
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* Copyright (C) International Business Machines Corp., 2000-2004
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* Portions Copyright (C) Christoph Hellwig, 2001-2002
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/fs.h>
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#include <linux/ctype.h>
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#include <linux/module.h>
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#include <linux/proc_fs.h>
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#include <asm/uaccess.h>
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#include "jfs_incore.h"
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#include "jfs_filsys.h"
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#include "jfs_debug.h"
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#ifdef PROC_FS_JFS /* see jfs_debug.h */
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static struct proc_dir_entry *base;
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#ifdef CONFIG_JFS_DEBUG
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static int loglevel_read(char *page, char **start, off_t off,
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int count, int *eof, void *data)
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{
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int len;
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len = sprintf(page, "%d\n", jfsloglevel);
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len -= off;
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*start = page + off;
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if (len > count)
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len = count;
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else
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*eof = 1;
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if (len < 0)
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len = 0;
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return len;
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}
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static int loglevel_write(struct file *file, const char __user *buffer,
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unsigned long count, void *data)
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{
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char c;
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if (get_user(c, buffer))
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return -EFAULT;
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/* yes, I know this is an ASCIIism. --hch */
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if (c < '0' || c > '9')
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return -EINVAL;
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jfsloglevel = c - '0';
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return count;
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}
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#endif
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static struct {
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const char *name;
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read_proc_t *read_fn;
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write_proc_t *write_fn;
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} Entries[] = {
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#ifdef CONFIG_JFS_STATISTICS
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{ "lmstats", jfs_lmstats_read, },
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{ "txstats", jfs_txstats_read, },
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{ "xtstat", jfs_xtstat_read, },
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{ "mpstat", jfs_mpstat_read, },
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#endif
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#ifdef CONFIG_JFS_DEBUG
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{ "TxAnchor", jfs_txanchor_read, },
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{ "loglevel", loglevel_read, loglevel_write }
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#endif
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};
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#define NPROCENT ARRAY_SIZE(Entries)
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void jfs_proc_init(void)
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{
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int i;
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if (!(base = proc_mkdir("jfs", proc_root_fs)))
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return;
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base->owner = THIS_MODULE;
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for (i = 0; i < NPROCENT; i++) {
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struct proc_dir_entry *p;
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if ((p = create_proc_entry(Entries[i].name, 0, base))) {
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p->read_proc = Entries[i].read_fn;
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p->write_proc = Entries[i].write_fn;
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}
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}
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}
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void jfs_proc_clean(void)
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{
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int i;
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if (base) {
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for (i = 0; i < NPROCENT; i++)
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remove_proc_entry(Entries[i].name, base);
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remove_proc_entry("jfs", proc_root_fs);
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}
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}
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#endif /* PROC_FS_JFS */
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