/*
- * bin.c - binary file operations for sysfs.
+ * fs/sysfs/bin.c - sysfs binary file implementation
*
* Copyright (c) 2003 Patrick Mochel
* Copyright (c) 2003 Matthew Wilcox
* Copyright (c) 2004 Silicon Graphics, Inc.
+ * Copyright (c) 2007 SUSE Linux Products GmbH
+ * Copyright (c) 2007 Tejun Heo <teheo@suse.de>
+ *
+ * This file is released under the GPLv2.
+ *
+ * Please see Documentation/filesystems/sysfs.txt for more information.
*/
#undef DEBUG
#include <linux/kobject.h>
#include <linux/module.h>
#include <linux/slab.h>
+#include <linux/mutex.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include "sysfs.h"
fill_read(struct dentry *dentry, char *buffer, loff_t off, size_t count)
{
struct sysfs_dirent *attr_sd = dentry->d_fsdata;
- struct bin_attribute *attr = attr_sd->s_elem.bin_attr.bin_attr;
- struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj;
+ struct bin_attribute *attr = attr_sd->s_bin_attr.bin_attr;
+ struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
int rc;
/* need attr_sd for attr, its parent for kobj */
flush_write(struct dentry *dentry, char *buffer, loff_t offset, size_t count)
{
struct sysfs_dirent *attr_sd = dentry->d_fsdata;
- struct bin_attribute *attr = attr_sd->s_elem.bin_attr.bin_attr;
- struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj;
+ struct bin_attribute *attr = attr_sd->s_bin_attr.bin_attr;
+ struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
int rc;
/* need attr_sd for attr, its parent for kobj */
{
struct bin_buffer *bb = file->private_data;
struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
- struct bin_attribute *attr = attr_sd->s_elem.bin_attr.bin_attr;
- struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj;
+ struct bin_attribute *attr = attr_sd->s_bin_attr.bin_attr;
+ struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
int rc;
mutex_lock(&bb->mutex);
static int open(struct inode * inode, struct file * file)
{
struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
- struct bin_attribute *attr = attr_sd->s_elem.bin_attr.bin_attr;
+ struct bin_attribute *attr = attr_sd->s_bin_attr.bin_attr;
struct bin_buffer *bb = NULL;
int error;
- /* need attr_sd for attr */
- if (!sysfs_get_active(attr_sd))
+ /* binary file operations requires both @sd and its parent */
+ if (!sysfs_get_active_two(attr_sd))
return -ENODEV;
error = -EACCES;
mutex_init(&bb->mutex);
file->private_data = bb;
- /* open succeeded, put active reference and pin attr_sd */
- sysfs_put_active(attr_sd);
- sysfs_get(attr_sd);
+ /* open succeeded, put active references */
+ sysfs_put_active_two(attr_sd);
return 0;
err_out:
- sysfs_put_active(attr_sd);
+ sysfs_put_active_two(attr_sd);
kfree(bb);
return error;
}
if (bb->mmapped)
sysfs_put_active_two(attr_sd);
- sysfs_put(attr_sd);
kfree(bb->buffer);
kfree(bb);
return 0;