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 static int loglevel_read(char *page, char **start, off_t off, 62 int count, int *eof, void *data) 63 { 64 int len; 65 66 len = sprintf(page, "%d\n", jfsloglevel); 67 68 len -= off; 69 *start = page + off; 70 71 if (len > count) 72 len = count; 73 else 74 *eof = 1; 75 76 if (len < 0) 77 len = 0; 78 79 return len; 80 } 81 82 static int loglevel_write(struct file *file, const char __user *buffer, 83 unsigned long count, void *data) 84 { 85 char c; 86 87 if (get_user(c, buffer)) 88 return -EFAULT; 89 90 /* yes, I know this is an ASCIIism. --hch */ 91 if (c < '0' || c > '9') 92 return -EINVAL; 93 jfsloglevel = c - '0'; 94 return count; 95 } 96 #endif 97 98 static struct { 99 const char *name; 100 read_proc_t *read_fn; 101 write_proc_t *write_fn; 102 } Entries[] = { 103 #ifdef CONFIG_JFS_STATISTICS 104 { "lmstats", jfs_lmstats_read, }, 105 { "txstats", jfs_txstats_read, }, 106 { "xtstat", jfs_xtstat_read, }, 107 { "mpstat", jfs_mpstat_read, }, 108 #endif 109 #ifdef CONFIG_JFS_DEBUG 110 { "TxAnchor", jfs_txanchor_read, }, 111 { "loglevel", loglevel_read, loglevel_write } 112 #endif 113 }; 114 #define NPROCENT (sizeof(Entries)/sizeof(Entries[0])) 115 116 void jfs_proc_init(void) 117 { 118 int i; 119 120 if (!(base = proc_mkdir("jfs", proc_root_fs))) 121 return; 122 base->owner = THIS_MODULE; 123 124 for (i = 0; i < NPROCENT; i++) { 125 struct proc_dir_entry *p; 126 if ((p = create_proc_entry(Entries[i].name, 0, base))) { 127 p->read_proc = Entries[i].read_fn; 128 p->write_proc = Entries[i].write_fn; 129 } 130 } 131 } 132 133 void jfs_proc_clean(void) 134 { 135 int i; 136 137 if (base) { 138 for (i = 0; i < NPROCENT; i++) 139 remove_proc_entry(Entries[i].name, base); 140 remove_proc_entry("jfs", proc_root_fs); 141 } 142 } 143 144 #endif /* PROC_FS_JFS */ 145