Commit | Line | Data |
---|---|---|
d963cd95 CG |
1 | #include <linux/debugfs.h> |
2 | ||
3 | static struct dentry *ras_debugfs_dir; | |
4 | ||
5 | static atomic_t trace_count = ATOMIC_INIT(0); | |
6 | ||
7 | int ras_userspace_consumers(void) | |
8 | { | |
9 | return atomic_read(&trace_count); | |
10 | } | |
11 | EXPORT_SYMBOL_GPL(ras_userspace_consumers); | |
12 | ||
13 | static int trace_show(struct seq_file *m, void *v) | |
14 | { | |
15 | return atomic_read(&trace_count); | |
16 | } | |
17 | ||
18 | static int trace_open(struct inode *inode, struct file *file) | |
19 | { | |
20 | atomic_inc(&trace_count); | |
21 | return single_open(file, trace_show, NULL); | |
22 | } | |
23 | ||
24 | static int trace_release(struct inode *inode, struct file *file) | |
25 | { | |
26 | atomic_dec(&trace_count); | |
27 | return single_release(inode, file); | |
28 | } | |
29 | ||
30 | static const struct file_operations trace_fops = { | |
31 | .open = trace_open, | |
32 | .read = seq_read, | |
33 | .llseek = seq_lseek, | |
34 | .release = trace_release, | |
35 | }; | |
36 | ||
37 | int __init ras_add_daemon_trace(void) | |
38 | { | |
39 | struct dentry *fentry; | |
40 | ||
41 | if (!ras_debugfs_dir) | |
42 | return -ENOENT; | |
43 | ||
44 | fentry = debugfs_create_file("daemon_active", S_IRUSR, ras_debugfs_dir, | |
45 | NULL, &trace_fops); | |
46 | if (!fentry) | |
47 | return -ENODEV; | |
48 | ||
49 | return 0; | |
50 | ||
51 | } | |
52 | ||
53 | void __init ras_debugfs_init(void) | |
54 | { | |
55 | ras_debugfs_dir = debugfs_create_dir("ras", NULL); | |
56 | } |