ia64/linux-2.6.18-xen.hg

view fs/jfs/jfs_debug.c @ 524:7f8b544237bf

netfront: Allow netfront in domain 0.

This is useful if your physical network device is in a utility domain.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Apr 15 15:18:58 2008 +0100 (2008-04-15)
parents 831230e53067
children
line source
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 */
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"
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];
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
57 #ifdef PROC_FS_JFS /* see jfs_debug.h */
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;
66 len = sprintf(page, "%d\n", jfsloglevel);
68 len -= off;
69 *start = page + off;
71 if (len > count)
72 len = count;
73 else
74 *eof = 1;
76 if (len < 0)
77 len = 0;
79 return len;
80 }
82 static int loglevel_write(struct file *file, const char __user *buffer,
83 unsigned long count, void *data)
84 {
85 char c;
87 if (get_user(c, buffer))
88 return -EFAULT;
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
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 ARRAY_SIZE(Entries)
116 void jfs_proc_init(void)
117 {
118 int i;
120 if (!(base = proc_mkdir("jfs", proc_root_fs)))
121 return;
122 base->owner = THIS_MODULE;
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 }
133 void jfs_proc_clean(void)
134 {
135 int i;
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 }
144 #endif /* PROC_FS_JFS */