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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 | |
63f83c9f | 7 | * the Free Software Foundation; either version 2 of the License, or |
1da177e4 | 8 | * (at your option) any later version. |
63f83c9f | 9 | * |
1da177e4 LT |
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 | |
63f83c9f | 16 | * along with this program; if not, write to the Free Software |
1da177e4 LT |
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 | ||
1da177e4 LT |
29 | #ifdef PROC_FS_JFS /* see jfs_debug.h */ |
30 | ||
31 | static struct proc_dir_entry *base; | |
32 | #ifdef CONFIG_JFS_DEBUG | |
1da177e4 LT |
33 | static int loglevel_read(char *page, char **start, off_t off, |
34 | int count, int *eof, void *data) | |
35 | { | |
36 | int len; | |
37 | ||
38 | len = sprintf(page, "%d\n", jfsloglevel); | |
39 | ||
40 | len -= off; | |
41 | *start = page + off; | |
42 | ||
43 | if (len > count) | |
44 | len = count; | |
45 | else | |
46 | *eof = 1; | |
47 | ||
48 | if (len < 0) | |
49 | len = 0; | |
50 | ||
51 | return len; | |
52 | } | |
53 | ||
54 | static int loglevel_write(struct file *file, const char __user *buffer, | |
55 | unsigned long count, void *data) | |
56 | { | |
57 | char c; | |
58 | ||
59 | if (get_user(c, buffer)) | |
60 | return -EFAULT; | |
61 | ||
62 | /* yes, I know this is an ASCIIism. --hch */ | |
63 | if (c < '0' || c > '9') | |
64 | return -EINVAL; | |
65 | jfsloglevel = c - '0'; | |
66 | return count; | |
67 | } | |
68 | #endif | |
69 | ||
1da177e4 LT |
70 | static struct { |
71 | const char *name; | |
72 | read_proc_t *read_fn; | |
73 | write_proc_t *write_fn; | |
74 | } Entries[] = { | |
75 | #ifdef CONFIG_JFS_STATISTICS | |
76 | { "lmstats", jfs_lmstats_read, }, | |
77 | { "txstats", jfs_txstats_read, }, | |
78 | { "xtstat", jfs_xtstat_read, }, | |
79 | { "mpstat", jfs_mpstat_read, }, | |
80 | #endif | |
81 | #ifdef CONFIG_JFS_DEBUG | |
82 | { "TxAnchor", jfs_txanchor_read, }, | |
83 | { "loglevel", loglevel_read, loglevel_write } | |
84 | #endif | |
85 | }; | |
e8c96f8c | 86 | #define NPROCENT ARRAY_SIZE(Entries) |
1da177e4 LT |
87 | |
88 | void jfs_proc_init(void) | |
89 | { | |
90 | int i; | |
91 | ||
92 | if (!(base = proc_mkdir("jfs", proc_root_fs))) | |
93 | return; | |
94 | base->owner = THIS_MODULE; | |
95 | ||
96 | for (i = 0; i < NPROCENT; i++) { | |
97 | struct proc_dir_entry *p; | |
98 | if ((p = create_proc_entry(Entries[i].name, 0, base))) { | |
99 | p->read_proc = Entries[i].read_fn; | |
100 | p->write_proc = Entries[i].write_fn; | |
101 | } | |
102 | } | |
103 | } | |
104 | ||
105 | void jfs_proc_clean(void) | |
106 | { | |
107 | int i; | |
108 | ||
109 | if (base) { | |
110 | for (i = 0; i < NPROCENT; i++) | |
111 | remove_proc_entry(Entries[i].name, base); | |
112 | remove_proc_entry("jfs", proc_root_fs); | |
113 | } | |
114 | } | |
115 | ||
116 | #endif /* PROC_FS_JFS */ |