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1da177e4 LT |
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 */ |