[linux-block.git] / drivers / ras / debugfs.c

// SPDX-License-Identifier: GPL-2.0-only
#include <linux/debugfs.h>
#include <linux/ras.h>
#include "debugfs.h"

struct dentry *ras_debugfs_dir;

static atomic_t trace_count = ATOMIC_INIT(0);

int ras_userspace_consumers(void)
{
	return atomic_read(&trace_count);
}
EXPORT_SYMBOL_GPL(ras_userspace_consumers);

static int trace_show(struct seq_file *m, void *v)
{
	return 0;
}

static int trace_open(struct inode *inode, struct file *file)
{
	atomic_inc(&trace_count);
	return single_open(file, trace_show, NULL);
}

static int trace_release(struct inode *inode, struct file *file)
{
	atomic_dec(&trace_count);
	return single_release(inode, file);
}

static const struct file_operations trace_fops = {
	.open    = trace_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = trace_release,
};

int __init ras_add_daemon_trace(void)
{
	struct dentry *fentry;

	if (!ras_debugfs_dir)
		return -ENOENT;

	fentry = debugfs_create_file("daemon_active", S_IRUSR, ras_debugfs_dir,
				     NULL, &trace_fops);
	if (!fentry)
		return -ENODEV;

	return 0;

}

void __init ras_debugfs_init(void)
{
	ras_debugfs_dir = debugfs_create_dir("ras", NULL);
}
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>
0a54b809 VK	4	#include "debugfs.h"
d963cd95	5
011d8261	6	struct dentry *ras_debugfs_dir;
d963cd95 CG	7
	8	static atomic_t trace_count = ATOMIC_INIT(0);
	9
	10	int ras_userspace_consumers(void)
	11	{
	12	return atomic_read(&trace_count);
	13	}
	14	EXPORT_SYMBOL_GPL(ras_userspace_consumers);
	15
	16	static int trace_show(struct seq_file m, void v)
	17	{
50865c14	18	return 0;
d963cd95 CG	19	}
	20
	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
	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
	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 (!fentry)
	50	return -ENODEV;
	51
	52	return 0;
	53
	54	}
	55
	56	void __init ras_debugfs_init(void)
	57	{
	58	ras_debugfs_dir = debugfs_create_dir("ras", NULL);
	59	}