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 <asm/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 static struct proc_dir_entry *base; 33 #ifdef CONFIG_JFS_DEBUG 34 static int jfs_loglevel_proc_show(struct seq_file *m, void *v) 35 { 36 seq_printf(m, "%d\n", jfsloglevel); 37 return 0; 38 } 39 40 static int jfs_loglevel_proc_open(struct inode *inode, struct file *file) 41 { 42 return single_open(file, jfs_loglevel_proc_show, NULL); 43 } 44 45 static ssize_t jfs_loglevel_proc_write(struct file *file, 46 const char __user *buffer, size_t count, loff_t *ppos) 47 { 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 } 59 60 static 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 }; 68 #endif 69 70 static struct { 71 const char *name; 72 const struct file_operations *proc_fops; 73 } Entries[] = { 74 #ifdef CONFIG_JFS_STATISTICS 75 { "lmstats", &jfs_lmstats_proc_fops, }, 76 { "txstats", &jfs_txstats_proc_fops, }, 77 { "xtstat", &jfs_xtstat_proc_fops, }, 78 { "mpstat", &jfs_mpstat_proc_fops, }, 79 #endif 80 #ifdef CONFIG_JFS_DEBUG 81 { "TxAnchor", &jfs_txanchor_proc_fops, }, 82 { "loglevel", &jfs_loglevel_proc_fops } 83 #endif 84 }; 85 #define NPROCENT ARRAY_SIZE(Entries) 86 87 void jfs_proc_init(void) 88 { 89 int i; 90 91 if (!(base = proc_mkdir("fs/jfs", NULL))) 92 return; 93 94 for (i = 0; i < NPROCENT; i++) 95 proc_create(Entries[i].name, 0, base, Entries[i].proc_fops); 96 } 97 98 void jfs_proc_clean(void) 99 { 100 int i; 101 102 if (base) { 103 for (i = 0; i < NPROCENT; i++) 104 remove_proc_entry(Entries[i].name, base); 105 remove_proc_entry("fs/jfs", NULL); 106 } 107 } 108 109 #endif /* PROC_FS_JFS */ 110