1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Copyright (C) International Business Machines Corp., 2000-2004 |
4 | * Portions Copyright (C) Christoph Hellwig, 2001-2002 |
5 | */ |
6 | |
7 | #include <linux/fs.h> |
8 | #include <linux/ctype.h> |
9 | #include <linux/module.h> |
10 | #include <linux/proc_fs.h> |
11 | #include <linux/seq_file.h> |
12 | #include <linux/uaccess.h> |
13 | #include "jfs_incore.h" |
14 | #include "jfs_filsys.h" |
15 | #include "jfs_debug.h" |
16 | |
17 | #ifdef PROC_FS_JFS /* see jfs_debug.h */ |
18 | |
19 | #ifdef CONFIG_JFS_DEBUG |
20 | static int jfs_loglevel_proc_show(struct seq_file *m, void *v) |
21 | { |
22 | seq_printf(m, fmt: "%d\n" , jfsloglevel); |
23 | return 0; |
24 | } |
25 | |
26 | static int jfs_loglevel_proc_open(struct inode *inode, struct file *file) |
27 | { |
28 | return single_open(file, jfs_loglevel_proc_show, NULL); |
29 | } |
30 | |
31 | static ssize_t jfs_loglevel_proc_write(struct file *file, |
32 | const char __user *buffer, size_t count, loff_t *ppos) |
33 | { |
34 | char c; |
35 | |
36 | if (get_user(c, buffer)) |
37 | return -EFAULT; |
38 | |
39 | /* yes, I know this is an ASCIIism. --hch */ |
40 | if (c < '0' || c > '9') |
41 | return -EINVAL; |
42 | jfsloglevel = c - '0'; |
43 | return count; |
44 | } |
45 | |
46 | static const struct proc_ops jfs_loglevel_proc_ops = { |
47 | .proc_open = jfs_loglevel_proc_open, |
48 | .proc_read = seq_read, |
49 | .proc_lseek = seq_lseek, |
50 | .proc_release = single_release, |
51 | .proc_write = jfs_loglevel_proc_write, |
52 | }; |
53 | #endif |
54 | |
55 | void jfs_proc_init(void) |
56 | { |
57 | struct proc_dir_entry *base; |
58 | |
59 | base = proc_mkdir("fs/jfs" , NULL); |
60 | if (!base) |
61 | return; |
62 | |
63 | #ifdef CONFIG_JFS_STATISTICS |
64 | proc_create_single("lmstats" , 0, base, jfs_lmstats_proc_show); |
65 | proc_create_single("txstats" , 0, base, jfs_txstats_proc_show); |
66 | proc_create_single("xtstat" , 0, base, jfs_xtstat_proc_show); |
67 | proc_create_single("mpstat" , 0, base, jfs_mpstat_proc_show); |
68 | #endif |
69 | #ifdef CONFIG_JFS_DEBUG |
70 | proc_create_single("TxAnchor" , 0, base, jfs_txanchor_proc_show); |
71 | proc_create(name: "loglevel" , mode: 0, parent: base, proc_ops: &jfs_loglevel_proc_ops); |
72 | #endif |
73 | } |
74 | |
75 | void jfs_proc_clean(void) |
76 | { |
77 | remove_proc_subtree("fs/jfs" , NULL); |
78 | } |
79 | |
80 | #endif /* PROC_FS_JFS */ |
81 | |