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, "%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 < '' || c > '9')
41 return -EINVAL;
42 jfsloglevel = c - '';
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("loglevel", 0, base, &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
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