1// SPDX-License-Identifier: GPL-2.0-only
 2#include <linux/debugfs.h>
 3#include <linux/ras.h>
 4#include "debugfs.h"
 5
 6static struct dentry *ras_debugfs_dir;
 7
 8static atomic_t trace_count = ATOMIC_INIT(0);
 9
10struct dentry *ras_get_debugfs_root(void)
11{
12	return ras_debugfs_dir;
13}
14EXPORT_SYMBOL_GPL(ras_get_debugfs_root);
15
16int ras_userspace_consumers(void)
17{
18	return atomic_read(&trace_count);
19}
20EXPORT_SYMBOL_GPL(ras_userspace_consumers);
21
22static int trace_show(struct seq_file *m, void *v)
23{
24	return 0;
25}
26
27static 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
33static int trace_release(struct inode *inode, struct file *file)
34{
35	atomic_dec(&trace_count);
36	return single_release(inode, file);
37}
38
39static const struct file_operations trace_fops = {
40	.open    = trace_open,
41	.read    = seq_read,
42	.llseek  = seq_lseek,
43	.release = trace_release,
44};
45
46int __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);
55	if (IS_ERR(fentry))
56		return -ENODEV;
57
58	return 0;
59
60}
61
62void __init ras_debugfs_init(void)
63{
64	ras_debugfs_dir = debugfs_create_dir("ras", NULL);
65}

 
 1#include <linux/debugfs.h>
 
 
 2
 3static struct dentry *ras_debugfs_dir;
 4
 5static atomic_t trace_count = ATOMIC_INIT(0);
 6
 
 
 
 
 
 
 7int ras_userspace_consumers(void)
 8{
 9	return atomic_read(&trace_count);
10}
11EXPORT_SYMBOL_GPL(ras_userspace_consumers);
12
13static int trace_show(struct seq_file *m, void *v)
14{
15	return atomic_read(&trace_count);
16}
17
18static 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
24static int trace_release(struct inode *inode, struct file *file)
25{
26	atomic_dec(&trace_count);
27	return single_release(inode, file);
28}
29
30static const struct file_operations trace_fops = {
31	.open    = trace_open,
32	.read    = seq_read,
33	.llseek  = seq_lseek,
34	.release = trace_release,
35};
36
37int __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
53void __init ras_debugfs_init(void)
54{
55	ras_debugfs_dir = debugfs_create_dir("ras", NULL);
56}