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 */ 94