1 files changed, 0 insertions, 344 deletions
diff --git a/ANDROID_3.4.5/fs/configfs/file.c b/ANDROID_3.4.5/fs/configfs/file.c
deleted file mode 100644
index 2b6cb23d..00000000
--- a/ANDROID_3.4.5/fs/configfs/file.c
+++ /dev/null
@@ -1,344 +0,0 @@
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
- * file.c - operations for regular (text) files.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
- * Based on sysfs:
- * 	sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
- *
- * configfs Copyright (C) 2005 Oracle.  All rights reserved.
- */
-
-#include <linux/fs.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/mutex.h>
-#include <asm/uaccess.h>
-
-#include <linux/configfs.h>
-#include "configfs_internal.h"
-
-/*
- * A simple attribute can only be 4096 characters.  Why 4k?  Because the
- * original code limited it to PAGE_SIZE.  That's a bad idea, though,
- * because an attribute of 16k on ia64 won't work on x86.  So we limit to
- * 4k, our minimum common page size.
- */
-#define SIMPLE_ATTR_SIZE 4096
-
-struct configfs_buffer {
-	size_t			count;
-	loff_t			pos;
-	char			* page;
-	struct configfs_item_operations	* ops;
-	struct mutex		mutex;
-	int			needs_read_fill;
-};
-
-
-/**
- *	fill_read_buffer - allocate and fill buffer from item.
- *	@dentry:	dentry pointer.
- *	@buffer:	data buffer for file.
- *
- *	Allocate @buffer->page, if it hasn't been already, then call the
- *	config_item's show() method to fill the buffer with this attribute's
- *	data.
- *	This is called only once, on the file's first read.
- */
-static int fill_read_buffer(struct dentry * dentry, struct configfs_buffer * buffer)
-{
-	struct configfs_attribute * attr = to_attr(dentry);
-	struct config_item * item = to_item(dentry->d_parent);
-	struct configfs_item_operations * ops = buffer->ops;
-	int ret = 0;
-	ssize_t count;
-
-	if (!buffer->page)
-		buffer->page = (char *) get_zeroed_page(GFP_KERNEL);
-	if (!buffer->page)
-		return -ENOMEM;
-
-	count = ops->show_attribute(item,attr,buffer->page);
-	buffer->needs_read_fill = 0;
-	BUG_ON(count > (ssize_t)SIMPLE_ATTR_SIZE);
-	if (count >= 0)
-		buffer->count = count;
-	else
-		ret = count;
-	return ret;
-}
-
-/**
- *	configfs_read_file - read an attribute.
- *	@file:	file pointer.
- *	@buf:	buffer to fill.
- *	@count:	number of bytes to read.
- *	@ppos:	starting offset in file.
- *
- *	Userspace wants to read an attribute file. The attribute descriptor
- *	is in the file's ->d_fsdata. The target item is in the directory's
- *	->d_fsdata.
- *
- *	We call fill_read_buffer() to allocate and fill the buffer from the
- *	item's show() method exactly once (if the read is happening from
- *	the beginning of the file). That should fill the entire buffer with
- *	all the data the item has to offer for that attribute.
- *	We then call flush_read_buffer() to copy the buffer to userspace
- *	in the increments specified.
- */
-
-static ssize_t
-configfs_read_file(struct file *file, char __user *buf, size_t count, loff_t *ppos)
-{
-	struct configfs_buffer * buffer = file->private_data;
-	ssize_t retval = 0;
-
-	mutex_lock(&buffer->mutex);
-	if (buffer->needs_read_fill) {
-		if ((retval = fill_read_buffer(file->f_path.dentry,buffer)))
-			goto out;
-	}
-	pr_debug("%s: count = %zd, ppos = %lld, buf = %s\n",
-		 __func__, count, *ppos, buffer->page);
-	retval = simple_read_from_buffer(buf, count, ppos, buffer->page,
-					 buffer->count);
-out:
-	mutex_unlock(&buffer->mutex);
-	return retval;
-}
-
-
-/**
- *	fill_write_buffer - copy buffer from userspace.
- *	@buffer:	data buffer for file.
- *	@buf:		data from user.
- *	@count:		number of bytes in @userbuf.
- *
- *	Allocate @buffer->page if it hasn't been already, then
- *	copy the user-supplied buffer into it.
- */
-
-static int
-fill_write_buffer(struct configfs_buffer * buffer, const char __user * buf, size_t count)
-{
-	int error;
-
-	if (!buffer->page)
-		buffer->page = (char *)__get_free_pages(GFP_KERNEL, 0);
-	if (!buffer->page)
-		return -ENOMEM;
-
-	if (count >= SIMPLE_ATTR_SIZE)
-		count = SIMPLE_ATTR_SIZE - 1;
-	error = copy_from_user(buffer->page,buf,count);
-	buffer->needs_read_fill = 1;
-	/* if buf is assumed to contain a string, terminate it by \0,
-	 * so e.g. sscanf() can scan the string easily */
-	buffer->page[count] = 0;
-	return error ? -EFAULT : count;
-}
-
-
-/**
- *	flush_write_buffer - push buffer to config_item.
- *	@dentry:	dentry to the attribute
- *	@buffer:	data buffer for file.
- *	@count:		number of bytes
- *
- *	Get the correct pointers for the config_item and the attribute we're
- *	dealing with, then call the store() method for the attribute,
- *	passing the buffer that we acquired in fill_write_buffer().
- */
-
-static int
-flush_write_buffer(struct dentry * dentry, struct configfs_buffer * buffer, size_t count)
-{
-	struct configfs_attribute * attr = to_attr(dentry);
-	struct config_item * item = to_item(dentry->d_parent);
-	struct configfs_item_operations * ops = buffer->ops;
-
-	return ops->store_attribute(item,attr,buffer->page,count);
-}
-
-
-/**
- *	configfs_write_file - write an attribute.
- *	@file:	file pointer
- *	@buf:	data to write
- *	@count:	number of bytes
- *	@ppos:	starting offset
- *
- *	Similar to configfs_read_file(), though working in the opposite direction.
- *	We allocate and fill the data from the user in fill_write_buffer(),
- *	then push it to the config_item in flush_write_buffer().
- *	There is no easy way for us to know if userspace is only doing a partial
- *	write, so we don't support them. We expect the entire buffer to come
- *	on the first write.
- *	Hint: if you're writing a value, first read the file, modify only the
- *	the value you're changing, then write entire buffer back.
- */
-
-static ssize_t
-configfs_write_file(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
-{
-	struct configfs_buffer * buffer = file->private_data;
-	ssize_t len;
-
-	mutex_lock(&buffer->mutex);
-	len = fill_write_buffer(buffer, buf, count);
-	if (len > 0)
-		len = flush_write_buffer(file->f_path.dentry, buffer, count);
-	if (len > 0)
-		*ppos += len;
-	mutex_unlock(&buffer->mutex);
-	return len;
-}
-
-static int check_perm(struct inode * inode, struct file * file)
-{
-	struct config_item *item = configfs_get_config_item(file->f_path.dentry->d_parent);
-	struct configfs_attribute * attr = to_attr(file->f_path.dentry);
-	struct configfs_buffer * buffer;
-	struct configfs_item_operations * ops = NULL;
-	int error = 0;
-
-	if (!item || !attr)
-		goto Einval;
-
-	/* Grab the module reference for this attribute if we have one */
-	if (!try_module_get(attr->ca_owner)) {
-		error = -ENODEV;
-		goto Done;
-	}
-
-	if (item->ci_type)
-		ops = item->ci_type->ct_item_ops;
-	else
-		goto Eaccess;
-
-	/* File needs write support.
-	 * The inode's perms must say it's ok,
-	 * and we must have a store method.
-	 */
-	if (file->f_mode & FMODE_WRITE) {
-
-		if (!(inode->i_mode & S_IWUGO) || !ops->store_attribute)
-			goto Eaccess;
-
-	}
-
-	/* File needs read support.
-	 * The inode's perms must say it's ok, and we there
-	 * must be a show method for it.
-	 */
-	if (file->f_mode & FMODE_READ) {
-		if (!(inode->i_mode & S_IRUGO) || !ops->show_attribute)
-			goto Eaccess;
-	}
-
-	/* No error? Great, allocate a buffer for the file, and store it
-	 * it in file->private_data for easy access.
-	 */
-	buffer = kzalloc(sizeof(struct configfs_buffer),GFP_KERNEL);
-	if (!buffer) {
-		error = -ENOMEM;
-		goto Enomem;
-	}
-	mutex_init(&buffer->mutex);
-	buffer->needs_read_fill = 1;
-	buffer->ops = ops;
-	file->private_data = buffer;
-	goto Done;
-
- Einval:
-	error = -EINVAL;
-	goto Done;
- Eaccess:
-	error = -EACCES;
- Enomem:
-	module_put(attr->ca_owner);
- Done:
-	if (error && item)
-		config_item_put(item);
-	return error;
-}
-
-static int configfs_open_file(struct inode * inode, struct file * filp)
-{
-	return check_perm(inode,filp);
-}
-
-static int configfs_release(struct inode * inode, struct file * filp)
-{
-	struct config_item * item = to_item(filp->f_path.dentry->d_parent);
-	struct configfs_attribute * attr = to_attr(filp->f_path.dentry);
-	struct module * owner = attr->ca_owner;
-	struct configfs_buffer * buffer = filp->private_data;
-
-	if (item)
-		config_item_put(item);
-	/* After this point, attr should not be accessed. */
-	module_put(owner);
-
-	if (buffer) {
-		if (buffer->page)
-			free_page((unsigned long)buffer->page);
-		mutex_destroy(&buffer->mutex);
-		kfree(buffer);
-	}
-	return 0;
-}
-
-const struct file_operations configfs_file_operations = {
-	.read		= configfs_read_file,
-	.write		= configfs_write_file,
-	.llseek		= generic_file_llseek,
-	.open		= configfs_open_file,
-	.release	= configfs_release,
-};
-
-
-int configfs_add_file(struct dentry * dir, const struct configfs_attribute * attr, int type)
-{
-	struct configfs_dirent * parent_sd = dir->d_fsdata;
-	umode_t mode = (attr->ca_mode & S_IALLUGO) | S_IFREG;
-	int error = 0;
-
-	mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_NORMAL);
-	error = configfs_make_dirent(parent_sd, NULL, (void *) attr, mode, type);
-	mutex_unlock(&dir->d_inode->i_mutex);
-
-	return error;
-}
-
-
-/**
- *	configfs_create_file - create an attribute file for an item.
- *	@item:	item we're creating for.
- *	@attr:	atrribute descriptor.
- */
-
-int configfs_create_file(struct config_item * item, const struct configfs_attribute * attr)
-{
-	BUG_ON(!item || !item->ci_dentry || !attr);
-
-	return configfs_add_file(item->ci_dentry, attr,
-				 CONFIGFS_ITEM_ATTR);
-}
-