RAS, debugfs: Add debugfs interface for RAS subsystem

obj-$(CONFIG_RAS) += ras.o

obj-$(CONFIG_RAS) += ras.o debugfs.o

#include <linux/debugfs.h>

static 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 atomic_read(&trace_count);

}

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);

}

 *	Chen, Gong <gong.chen@linux.intel.com>

 */

#include <linux/init.h>

#include <linux/ras.h>

#define CREATE_TRACE_POINTS

#define TRACE_INCLUDE_PATH ../../include/ras

#include <ras/ras_event.h>

static int __init ras_init(void)

{

	int rc = 0;

	ras_debugfs_init();

	rc = ras_add_daemon_trace();

	return rc;

}

subsys_initcall(ras_init);

EXPORT_TRACEPOINT_SYMBOL_GPL(mc_event);

#ifndef __RAS_H__

#define __RAS_H__

#ifdef CONFIG_DEBUG_FS

int ras_userspace_consumers(void);

void ras_debugfs_init(void);

int ras_add_daemon_trace(void);

#else

static inline int ras_userspace_consumers(void) { return 0; }

static inline void ras_debugfs_init(void) { return; }

static inline int ras_add_daemon_trace(void) { return 0; }

#endif

#endif