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 <asm/uaccess.h> 25 #include "jfs_incore.h" 26 #include "jfs_filsys.h" 27 #include "jfs_debug.h" 28 29 #ifdef CONFIG_JFS_DEBUG 30 void dump_mem(char *label, void *data, int length) 31 { 32 int i, j; 33 int *intptr = data; 34 char *charptr = data; 35 char buf[10], line[80]; 36 37 printk("%s: dump of %d bytes of data at 0x%p\n\n", label, length, 38 data); 39 for (i = 0; i < length; i += 16) { 40 line[0] = 0; 41 for (j = 0; (j < 4) && (i + j * 4 < length); j++) { 42 sprintf(buf, " %08x", intptr[i / 4 + j]); 43 strcat(line, buf); 44 } 45 buf[0] = ' '; 46 buf[2] = 0; 47 for (j = 0; (j < 16) && (i + j < length); j++) { 48 buf[1] = 49 isprint(charptr[i + j]) ? charptr[i + j] : '.'; 50 strcat(line, buf); 51 } 52 printk("%s\n", line); 53 } 54 } 55 #endif 56 57 #ifdef PROC_FS_JFS /* see jfs_debug.h */ 58 59 static struct proc_dir_entry *base; 60 #ifdef CONFIG_JFS_DEBUG 61 extern read_proc_t jfs_txanchor_read; 62 63 static int loglevel_read(char *page, char **start, off_t off, 64 int count, int *eof, void *data) 65 { 66 int len; 67 68 len = sprintf(page, "%d\n", jfsloglevel); 69 70 len -= off; 71 *start = page + off; 72 73 if (len > count) 74 len = count; 75 else 76 *eof = 1; 77 78 if (len < 0) 79 len = 0; 80 81 return len; 82 } 83 84 static int loglevel_write(struct file *file, const char __user *buffer, 85 unsigned long count, void *data) 86 { 87 char c; 88 89 if (get_user(c, buffer)) 90 return -EFAULT; 91 92 /* yes, I know this is an ASCIIism. --hch */ 93 if (c < '0' || c > '9') 94 return -EINVAL; 95 jfsloglevel = c - '0'; 96 return count; 97 } 98 #endif 99 100 101 #ifdef CONFIG_JFS_STATISTICS 102 extern read_proc_t jfs_lmstats_read; 103 extern read_proc_t jfs_txstats_read; 104 extern read_proc_t jfs_xtstat_read; 105 extern read_proc_t jfs_mpstat_read; 106 #endif 107 108 static struct { 109 const char *name; 110 read_proc_t *read_fn; 111 write_proc_t *write_fn; 112 } Entries[] = { 113 #ifdef CONFIG_JFS_STATISTICS 114 { "lmstats", jfs_lmstats_read, }, 115 { "txstats", jfs_txstats_read, }, 116 { "xtstat", jfs_xtstat_read, }, 117 { "mpstat", jfs_mpstat_read, }, 118 #endif 119 #ifdef CONFIG_JFS_DEBUG 120 { "TxAnchor", jfs_txanchor_read, }, 121 { "loglevel", loglevel_read, loglevel_write } 122 #endif 123 }; 124 #define NPROCENT (sizeof(Entries)/sizeof(Entries[0])) 125 126 void jfs_proc_init(void) 127 { 128 int i; 129 130 if (!(base = proc_mkdir("jfs", proc_root_fs))) 131 return; 132 base->owner = THIS_MODULE; 133 134 for (i = 0; i < NPROCENT; i++) { 135 struct proc_dir_entry *p; 136 if ((p = create_proc_entry(Entries[i].name, 0, base))) { 137 p->read_proc = Entries[i].read_fn; 138 p->write_proc = Entries[i].write_fn; 139 } 140 } 141 } 142 143 void jfs_proc_clean(void) 144 { 145 int i; 146 147 if (base) { 148 for (i = 0; i < NPROCENT; i++) 149 remove_proc_entry(Entries[i].name, base); 150 remove_proc_entry("jfs", proc_root_fs); 151 } 152 } 153 154 #endif /* PROC_FS_JFS */ 155