Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | }; |
Tobias Klauser | e8c96f8 | 2006-03-24 03:15:34 -0800 | [diff] [blame^] | 114 | #define NPROCENT ARRAY_SIZE(Entries) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |