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