usbfs2 initial file added

1 files changed, 394 insertions, 0 deletions

diff --git a/usb/usbfs2.patch b/usb/usbfs2.patch
new file mode 100644
index 00000000000000..b3802d8cf489b8
--- /dev/null
+++ b/usb/usbfs2.patch
@@ -0,0 +1,394 @@
+---
+ drivers/usb/Kconfig         |    2 
+ drivers/usb/Makefile        |    2 
+ drivers/usb/usbfs2/Kconfig  |    7 
+ drivers/usb/usbfs2/Makefile |    5 
+ drivers/usb/usbfs2/usbfs2.c |  343 ++++++++++++++++++++++++++++++++++++++++++++
+ 5 files changed, 359 insertions(+)
+
+--- /dev/null
++++ gregkh-2.6/drivers/usb/usbfs2/Makefile
+@@ -0,0 +1,5 @@
++obj-$(CONFIG_USB_USBFS2)	+= usbfs2.o
++
++ifeq ($(CONFIG_USB_DEBUG),y)
++EXTRA_CFLAGS += -DDEBUG
++endif
+--- gregkh-2.6.orig/drivers/usb/Kconfig
++++ gregkh-2.6/drivers/usb/Kconfig
+@@ -77,6 +77,8 @@ config USB
+ 
+ source "drivers/usb/core/Kconfig"
+ 
++source "drivers/usb/usbfs2/Kconfig"
++
+ source "drivers/usb/host/Kconfig"
+ 
+ source "drivers/usb/ip/Kconfig"
+--- gregkh-2.6.orig/drivers/usb/Makefile
++++ gregkh-2.6/drivers/usb/Makefile
+@@ -8,6 +8,8 @@ obj-$(CONFIG_USB)		+= core/
+ 
+ obj-$(CONFIG_USB_MON)		+= mon/
+ 
++obj-$(CONFIG_USB_USBFS2)	+= usbfs2/
++
+ obj-$(CONFIG_PCI)		+= host/
+ obj-$(CONFIG_USB_EHCI_HCD)	+= host/
+ obj-$(CONFIG_USB_ISP116X_HCD)	+= host/
+--- /dev/null
++++ gregkh-2.6/drivers/usb/usbfs2/Kconfig
+@@ -0,0 +1,7 @@
++config USB_USBFS2
++	tristate "USB device filesystem - version 2"
++	depends on USB
++	---help---
++	  Select this option to get the usb device file system, mark 2
++
++	  Most users want to say Y here.
+--- /dev/null
++++ gregkh-2.6/drivers/usb/usbfs2/usbfs2.c
+@@ -0,0 +1,343 @@
++/*
++ *  usbfs2.c - usbfs2
++ *
++ *  Copyright (C) 2006 Greg Kroah-Hartman <gregkh@suse.de>
++ *
++ *	This program is free software; you can redistribute it and/or
++ *	modify it under the terms of the GNU General Public License version
++ *	2 as published by the Free Software Foundation.
++ *
++ *  Based on security/inode.c which had the following copyright notice:
++ *    Copyright (C) 2005 Greg Kroah-Hartman <gregkh@suse.de>
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/fs.h>
++#include <linux/mount.h>
++#include <linux/pagemap.h>
++#include <linux/init.h>
++#include <linux/namei.h>
++#include <linux/usb.h>
++#include "../core/usb.h"
++
++#define USBFS2_MAGIC	0x75736266
++
++static struct vfsmount *mount;
++static int mount_count;
++
++/*
++ * TODO:
++ *   I think I can get rid of these default_file_ops, but not quite sure...
++ */
++static ssize_t default_read_file(struct file *file, char __user *buf,
++				 size_t count, loff_t *ppos)
++{
++	return 0;
++}
++
++static ssize_t default_write_file(struct file *file, const char __user *buf,
++				   size_t count, loff_t *ppos)
++{
++	return count;
++}
++
++static int default_open(struct inode *inode, struct file *file)
++{
++	if (inode->u.generic_ip)
++		file->private_data = inode->u.generic_ip;
++
++	return 0;
++}
++
++static struct file_operations default_file_ops = {
++	.read =		default_read_file,
++	.write =	default_write_file,
++	.open =		default_open,
++};
++
++static struct inode *get_inode(struct super_block *sb, int mode, dev_t dev)
++{
++	struct inode *inode = new_inode(sb);
++
++	if (inode) {
++		inode->i_mode = mode;
++		inode->i_uid = 0;
++		inode->i_gid = 0;
++		inode->i_blksize = PAGE_CACHE_SIZE;
++		inode->i_blocks = 0;
++		inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
++		switch (mode & S_IFMT) {
++		default:
++			init_special_inode(inode, mode, dev);
++			break;
++		case S_IFREG:
++			inode->i_fop = &default_file_ops;
++			break;
++		case S_IFDIR:
++			inode->i_op = &simple_dir_inode_operations;
++			inode->i_fop = &simple_dir_operations;
++
++			/* directory inodes start off with i_nlink == 2 (for "." entry) */
++			inode->i_nlink++;
++			break;
++		}
++	}
++	return inode;
++}
++
++/* SMP-safe */
++static int mknod(struct inode *dir, struct dentry *dentry,
++			 int mode, dev_t dev)
++{
++	struct inode *inode;
++	int error = -EPERM;
++
++	if (dentry->d_inode)
++		return -EEXIST;
++
++	inode = get_inode(dir->i_sb, mode, dev);
++	if (inode) {
++		d_instantiate(dentry, inode);
++		dget(dentry);
++		error = 0;
++	}
++	return error;
++}
++
++static int mkdir(struct inode *dir, struct dentry *dentry, int mode)
++{
++	int res;
++
++	mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
++	res = mknod(dir, dentry, mode, 0);
++	if (!res)
++		dir->i_nlink++;
++	return res;
++}
++
++static int create(struct inode *dir, struct dentry *dentry, int mode)
++{
++	mode = (mode & S_IALLUGO) | S_IFREG;
++	return mknod(dir, dentry, mode, 0);
++}
++
++static inline int positive(struct dentry *dentry)
++{
++	return dentry->d_inode && !d_unhashed(dentry);
++}
++
++static int fill_super(struct super_block *sb, void *data, int silent)
++{
++	static struct tree_descr files[] = {{""}};
++
++	return simple_fill_super(sb, USBFS2_MAGIC, files);
++}
++
++static struct super_block *get_sb(struct file_system_type *fs_type,
++				        int flags, const char *dev_name,
++					void *data)
++{
++	return get_sb_single(fs_type, flags, data, fill_super);
++}
++
++static struct file_system_type fs_type = {
++	.owner =	THIS_MODULE,
++	.name =		"usbfs2",
++	.get_sb =	get_sb,
++	.kill_sb =	kill_litter_super,
++};
++
++static int create_by_name(const char *name, mode_t mode,
++			  struct dentry *parent,
++			  struct dentry **dentry)
++{
++	int error = 0;
++
++	*dentry = NULL;
++
++	/* If the parent is not specified, we create it in the root.
++	 * We need the root dentry to do this, which is in the super
++	 * block. A pointer to that is in the struct vfsmount that we
++	 * have around.
++	 */
++	if (!parent ) {
++		if (mount && mount->mnt_sb) {
++			parent = mount->mnt_sb->s_root;
++		}
++	}
++	if (!parent) {
++		pr_debug("usbfs2: Ah! can not find a parent!\n");
++		return -EFAULT;
++	}
++
++	mutex_lock(&parent->d_inode->i_mutex);
++	*dentry = lookup_one_len(name, parent, strlen(name));
++	if (!IS_ERR(dentry)) {
++		if ((mode & S_IFMT) == S_IFDIR)
++			error = mkdir(parent->d_inode, *dentry, mode);
++		else
++			error = create(parent->d_inode, *dentry, mode);
++	} else
++		error = PTR_ERR(dentry);
++	mutex_unlock(&parent->d_inode->i_mutex);
++
++	return error;
++}
++
++/**
++ * securityfs_create_file - create a file in the securityfs filesystem
++ *
++ * @name: a pointer to a string containing the name of the file to create.
++ * @mode: the permission that the file should have
++ * @parent: a pointer to the parent dentry for this file.  This should be a
++ *          directory dentry if set.  If this paramater is NULL, then the
++ *          file will be created in the root of the securityfs filesystem.
++ * @data: a pointer to something that the caller will want to get to later
++ *        on.  The inode.u.generic_ip pointer will point to this value on
++ *        the open() call.
++ * @fops: a pointer to a struct file_operations that should be used for
++ *        this file.
++ *
++ * This is the basic "create a file" function for securityfs.  It allows for a
++ * wide range of flexibility in createing a file, or a directory (if you
++ * want to create a directory, the securityfs_create_dir() function is
++ * recommended to be used instead.)
++ *
++ * This function will return a pointer to a dentry if it succeeds.  This
++ * pointer must be passed to the securityfs_remove() function when the file is
++ * to be removed (no automatic cleanup happens if your module is unloaded,
++ * you are responsible here.)  If an error occurs, NULL will be returned.
++ *
++ * If securityfs is not enabled in the kernel, the value -ENODEV will be
++ * returned.  It is not wise to check for this value, but rather, check for
++ * NULL or !NULL instead as to eliminate the need for #ifdef in the calling
++ * code.
++ */
++struct dentry *securityfs_create_file(const char *name, mode_t mode,
++				   struct dentry *parent, void *data,
++				   struct file_operations *fops)
++{
++	struct dentry *dentry = NULL;
++	int error;
++
++	pr_debug("securityfs: creating file '%s'\n",name);
++
++	error = simple_pin_fs("securityfs", &mount, &mount_count);
++	if (error) {
++		dentry = ERR_PTR(error);
++		goto exit;
++	}
++
++	error = create_by_name(name, mode, parent, &dentry);
++	if (error) {
++		dentry = ERR_PTR(error);
++		simple_release_fs(&mount, &mount_count);
++		goto exit;
++	}
++
++	if (dentry->d_inode) {
++		if (fops)
++			dentry->d_inode->i_fop = fops;
++		if (data)
++			dentry->d_inode->u.generic_ip = data;
++	}
++exit:
++	return dentry;
++}
++
++/**
++ * securityfs_create_dir - create a directory in the securityfs filesystem
++ *
++ * @name: a pointer to a string containing the name of the directory to
++ *        create.
++ * @parent: a pointer to the parent dentry for this file.  This should be a
++ *          directory dentry if set.  If this paramater is NULL, then the
++ *          directory will be created in the root of the securityfs filesystem.
++ *
++ * This function creates a directory in securityfs with the given name.
++ *
++ * This function will return a pointer to a dentry if it succeeds.  This
++ * pointer must be passed to the securityfs_remove() function when the file is
++ * to be removed (no automatic cleanup happens if your module is unloaded,
++ * you are responsible here.)  If an error occurs, NULL will be returned.
++ *
++ * If securityfs is not enabled in the kernel, the value -ENODEV will be
++ * returned.  It is not wise to check for this value, but rather, check for
++ * NULL or !NULL instead as to eliminate the need for #ifdef in the calling
++ * code.
++ */
++struct dentry *securityfs_create_dir(const char *name, struct dentry *parent)
++{
++	return securityfs_create_file(name,
++				      S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
++				      parent, NULL, NULL);
++}
++
++/**
++ * securityfs_remove - removes a file or directory from the securityfs filesystem
++ *
++ * @dentry: a pointer to a the dentry of the file or directory to be
++ *          removed.
++ *
++ * This function removes a file or directory in securityfs that was previously
++ * created with a call to another securityfs function (like
++ * securityfs_create_file() or variants thereof.)
++ *
++ * This function is required to be called in order for the file to be
++ * removed, no automatic cleanup of files will happen when a module is
++ * removed, you are responsible here.
++ */
++void securityfs_remove(struct dentry *dentry)
++{
++	struct dentry *parent;
++
++	if (!dentry)
++		return;
++
++	parent = dentry->d_parent;
++	if (!parent || !parent->d_inode)
++		return;
++
++	mutex_lock(&parent->d_inode->i_mutex);
++	if (positive(dentry)) {
++		if (dentry->d_inode) {
++			if (S_ISDIR(dentry->d_inode->i_mode))
++				simple_rmdir(parent->d_inode, dentry);
++			else
++				simple_unlink(parent->d_inode, dentry);
++			dput(dentry);
++		}
++	}
++	mutex_unlock(&parent->d_inode->i_mutex);
++	simple_release_fs(&mount, &mount_count);
++}
++
++static decl_subsys(usbfs2, NULL, NULL);
++
++static int __init usbfs2_init(void)
++{
++	int retval;
++
++	kset_set_kset_s(&usbfs2_subsys, kernel_subsys);
++	retval = subsystem_register(&usbfs2_subsys);
++	if (retval)
++		return retval;
++
++	retval = register_filesystem(&fs_type);
++	if (retval)
++		subsystem_unregister(&usbfs2_subsys);
++	return retval;
++}
++
++static void __exit usbfs2_exit(void)
++{
++	simple_release_fs(&mount, &mount_count);
++	unregister_filesystem(&fs_type);
++	subsystem_unregister(&usbfs2_subsys);
++}
++
++core_initcall(usbfs2_init);
++module_exit(usbfs2_exit);
++MODULE_LICENSE("GPL");
++