fs/jfs/jfs_debug.c

   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 <linux/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
  32 #ifdef CONFIG_JFS_DEBUG
  33 static int jfs_loglevel_proc_show(struct seq_file *m, void *v)
  34 {
  35         seq_printf(m, "%d\n", jfsloglevel);
  36         return 0;
  37 }
  38
  39 static int jfs_loglevel_proc_open(struct inode *inode, struct file *file)
  40 {
  41         return single_open(file, jfs_loglevel_proc_show, NULL);
  42 }
  43
  44 static ssize_t jfs_loglevel_proc_write(struct file *file,
  45                 const char __user *buffer, size_t count, loff_t *ppos)
  46 {
  47         char c;
  48
  49         if (get_user(c, buffer))
  50                 return -EFAULT;
  51
  52         /* yes, I know this is an ASCIIism.  --hch */
  53         if (c < '0' || c > '9')
  54                 return -EINVAL;
  55         jfsloglevel = c - '0';
  56         return count;
  57 }
  58
  59 static const struct file_operations jfs_loglevel_proc_fops = {
  60         .open           = jfs_loglevel_proc_open,
  61         .read           = seq_read,
  62         .llseek         = seq_lseek,
  63         .release        = single_release,
  64         .write          = jfs_loglevel_proc_write,
  65 };
  66 #endif
  67
  68 void jfs_proc_init(void)
  69 {
  70         struct proc_dir_entry *base;
  71
  72         base = proc_mkdir("fs/jfs", NULL);
  73         if (!base)
  74                 return;
  75
  76 #ifdef CONFIG_JFS_STATISTICS
  77         proc_create_single("lmstats", 0, base, jfs_lmstats_proc_show);
  78         proc_create_single("txstats", 0, base, jfs_txstats_proc_show);
  79         proc_create_single("xtstat", 0, base, jfs_xtstat_proc_show);
  80         proc_create_single("mpstat", 0, base, jfs_mpstat_proc_show);
  81 #endif
  82 #ifdef CONFIG_JFS_DEBUG
  83         proc_create_single("TxAnchor", 0, base, jfs_txanchor_proc_show);
  84         proc_create("loglevel", 0, base, &jfs_loglevel_proc_fops);
  85 #endif
  86 }
  87
  88 void jfs_proc_clean(void)
  89 {
  90         remove_proc_subtree("fs/jfs", NULL);
  91 }
  92
  93 #endif /* PROC_FS_JFS */