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 < '' || c > '9')
94 return -EINVAL;
95 jfsloglevel = c - '';
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
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