Commit | Line | Data |
---|---|---|
457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
d963cd95 | 2 | #include <linux/debugfs.h> |
0a54b809 VK |
3 | #include <linux/ras.h> |
4 | #include "debugfs.h" | |
d963cd95 | 5 | |
9d2b6fa0 | 6 | static struct dentry *ras_debugfs_dir; |
d963cd95 CG |
7 | |
8 | static atomic_t trace_count = ATOMIC_INIT(0); | |
9 | ||
9d2b6fa0 BPA |
10 | struct dentry *ras_get_debugfs_root(void) |
11 | { | |
12 | return ras_debugfs_dir; | |
13 | } | |
14 | EXPORT_SYMBOL_GPL(ras_get_debugfs_root); | |
15 | ||
d963cd95 CG |
16 | int ras_userspace_consumers(void) |
17 | { | |
18 | return atomic_read(&trace_count); | |
19 | } | |
20 | EXPORT_SYMBOL_GPL(ras_userspace_consumers); | |
21 | ||
22 | static int trace_show(struct seq_file *m, void *v) | |
23 | { | |
50865c14 | 24 | return 0; |
d963cd95 CG |
25 | } |
26 | ||
27 | static int trace_open(struct inode *inode, struct file *file) | |
28 | { | |
29 | atomic_inc(&trace_count); | |
30 | return single_open(file, trace_show, NULL); | |
31 | } | |
32 | ||
33 | static int trace_release(struct inode *inode, struct file *file) | |
34 | { | |
35 | atomic_dec(&trace_count); | |
36 | return single_release(inode, file); | |
37 | } | |
38 | ||
39 | static const struct file_operations trace_fops = { | |
40 | .open = trace_open, | |
41 | .read = seq_read, | |
42 | .llseek = seq_lseek, | |
43 | .release = trace_release, | |
44 | }; | |
45 | ||
46 | int __init ras_add_daemon_trace(void) | |
47 | { | |
48 | struct dentry *fentry; | |
49 | ||
50 | if (!ras_debugfs_dir) | |
51 | return -ENOENT; | |
52 | ||
53 | fentry = debugfs_create_file("daemon_active", S_IRUSR, ras_debugfs_dir, | |
54 | NULL, &trace_fops); | |
2a1d18a5 | 55 | if (IS_ERR(fentry)) |
d963cd95 CG |
56 | return -ENODEV; |
57 | ||
58 | return 0; | |
59 | ||
60 | } | |
61 | ||
62 | void __init ras_debugfs_init(void) | |
63 | { | |
64 | ras_debugfs_dir = debugfs_create_dir("ras", NULL); | |
65 | } |