Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 621 deletions

diff --git a/ANDROID_3.4.5/fs/fuse/cuse.c b/ANDROID_3.4.5/fs/fuse/cuse.c
deleted file mode 100644
index 3426521f..00000000
--- a/ANDROID_3.4.5/fs/fuse/cuse.c
+++ /dev/null
@@ -1,621 +0,0 @@
-/*
- * CUSE: Character device in Userspace
- *
- * Copyright (C) 2008-2009  SUSE Linux Products GmbH
- * Copyright (C) 2008-2009  Tejun Heo <tj@kernel.org>
- *
- * This file is released under the GPLv2.
- *
- * CUSE enables character devices to be implemented from userland much
- * like FUSE allows filesystems.  On initialization /dev/cuse is
- * created.  By opening the file and replying to the CUSE_INIT request
- * userland CUSE server can create a character device.  After that the
- * operation is very similar to FUSE.
- *
- * A CUSE instance involves the following objects.
- *
- * cuse_conn	: contains fuse_conn and serves as bonding structure
- * channel	: file handle connected to the userland CUSE server
- * cdev		: the implemented character device
- * dev		: generic device for cdev
- *
- * Note that 'channel' is what 'dev' is in FUSE.  As CUSE deals with
- * devices, it's called 'channel' to reduce confusion.
- *
- * channel determines when the character device dies.  When channel is
- * closed, everything begins to destruct.  The cuse_conn is taken off
- * the lookup table preventing further access from cdev, cdev and
- * generic device are removed and the base reference of cuse_conn is
- * put.
- *
- * On each open, the matching cuse_conn is looked up and if found an
- * additional reference is taken which is released when the file is
- * closed.
- */
-
-#include <linux/fuse.h>
-#include <linux/cdev.h>
-#include <linux/device.h>
-#include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/kdev_t.h>
-#include <linux/kthread.h>
-#include <linux/list.h>
-#include <linux/magic.h>
-#include <linux/miscdevice.h>
-#include <linux/mutex.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/stat.h>
-#include <linux/module.h>
-
-#include "fuse_i.h"
-
-#define CUSE_CONNTBL_LEN	64
-
-struct cuse_conn {
-	struct list_head	list;	/* linked on cuse_conntbl */
-	struct fuse_conn	fc;	/* fuse connection */
-	struct cdev		*cdev;	/* associated character device */
-	struct device		*dev;	/* device representing @cdev */
-
-	/* init parameters, set once during initialization */
-	bool			unrestricted_ioctl;
-};
-
-static DEFINE_SPINLOCK(cuse_lock);		/* protects cuse_conntbl */
-static struct list_head cuse_conntbl[CUSE_CONNTBL_LEN];
-static struct class *cuse_class;
-
-static struct cuse_conn *fc_to_cc(struct fuse_conn *fc)
-{
-	return container_of(fc, struct cuse_conn, fc);
-}
-
-static struct list_head *cuse_conntbl_head(dev_t devt)
-{
-	return &cuse_conntbl[(MAJOR(devt) + MINOR(devt)) % CUSE_CONNTBL_LEN];
-}
-
-
-/**************************************************************************
- * CUSE frontend operations
- *
- * These are file operations for the character device.
- *
- * On open, CUSE opens a file from the FUSE mnt and stores it to
- * private_data of the open file.  All other ops call FUSE ops on the
- * FUSE file.
- */
-
-static ssize_t cuse_read(struct file *file, char __user *buf, size_t count,
-			 loff_t *ppos)
-{
-	loff_t pos = 0;
-
-	return fuse_direct_io(file, buf, count, &pos, 0);
-}
-
-static ssize_t cuse_write(struct file *file, const char __user *buf,
-			  size_t count, loff_t *ppos)
-{
-	loff_t pos = 0;
-	/*
-	 * No locking or generic_write_checks(), the server is
-	 * responsible for locking and sanity checks.
-	 */
-	return fuse_direct_io(file, buf, count, &pos, 1);
-}
-
-static int cuse_open(struct inode *inode, struct file *file)
-{
-	dev_t devt = inode->i_cdev->dev;
-	struct cuse_conn *cc = NULL, *pos;
-	int rc;
-
-	/* look up and get the connection */
-	spin_lock(&cuse_lock);
-	list_for_each_entry(pos, cuse_conntbl_head(devt), list)
-		if (pos->dev->devt == devt) {
-			fuse_conn_get(&pos->fc);
-			cc = pos;
-			break;
-		}
-	spin_unlock(&cuse_lock);
-
-	/* dead? */
-	if (!cc)
-		return -ENODEV;
-
-	/*
-	 * Generic permission check is already done against the chrdev
-	 * file, proceed to open.
-	 */
-	rc = fuse_do_open(&cc->fc, 0, file, 0);
-	if (rc)
-		fuse_conn_put(&cc->fc);
-	return rc;
-}
-
-static int cuse_release(struct inode *inode, struct file *file)
-{
-	struct fuse_file *ff = file->private_data;
-	struct fuse_conn *fc = ff->fc;
-
-	fuse_sync_release(ff, file->f_flags);
-	fuse_conn_put(fc);
-
-	return 0;
-}
-
-static long cuse_file_ioctl(struct file *file, unsigned int cmd,
-			    unsigned long arg)
-{
-	struct fuse_file *ff = file->private_data;
-	struct cuse_conn *cc = fc_to_cc(ff->fc);
-	unsigned int flags = 0;
-
-	if (cc->unrestricted_ioctl)
-		flags |= FUSE_IOCTL_UNRESTRICTED;
-
-	return fuse_do_ioctl(file, cmd, arg, flags);
-}
-
-static long cuse_file_compat_ioctl(struct file *file, unsigned int cmd,
-				   unsigned long arg)
-{
-	struct fuse_file *ff = file->private_data;
-	struct cuse_conn *cc = fc_to_cc(ff->fc);
-	unsigned int flags = FUSE_IOCTL_COMPAT;
-
-	if (cc->unrestricted_ioctl)
-		flags |= FUSE_IOCTL_UNRESTRICTED;
-
-	return fuse_do_ioctl(file, cmd, arg, flags);
-}
-
-static const struct file_operations cuse_frontend_fops = {
-	.owner			= THIS_MODULE,
-	.read			= cuse_read,
-	.write			= cuse_write,
-	.open			= cuse_open,
-	.release		= cuse_release,
-	.unlocked_ioctl		= cuse_file_ioctl,
-	.compat_ioctl		= cuse_file_compat_ioctl,
-	.poll			= fuse_file_poll,
-	.llseek		= noop_llseek,
-};
-
-
-/**************************************************************************
- * CUSE channel initialization and destruction
- */
-
-struct cuse_devinfo {
-	const char		*name;
-};
-
-/**
- * cuse_parse_one - parse one key=value pair
- * @pp: i/o parameter for the current position
- * @end: points to one past the end of the packed string
- * @keyp: out parameter for key
- * @valp: out parameter for value
- *
- * *@pp points to packed strings - "key0=val0\0key1=val1\0" which ends
- * at @end - 1.  This function parses one pair and set *@keyp to the
- * start of the key and *@valp to the start of the value.  Note that
- * the original string is modified such that the key string is
- * terminated with '\0'.  *@pp is updated to point to the next string.
- *
- * RETURNS:
- * 1 on successful parse, 0 on EOF, -errno on failure.
- */
-static int cuse_parse_one(char **pp, char *end, char **keyp, char **valp)
-{
-	char *p = *pp;
-	char *key, *val;
-
-	while (p < end && *p == '\0')
-		p++;
-	if (p == end)
-		return 0;
-
-	if (end[-1] != '\0') {
-		printk(KERN_ERR "CUSE: info not properly terminated\n");
-		return -EINVAL;
-	}
-
-	key = val = p;
-	p += strlen(p);
-
-	if (valp) {
-		strsep(&val, "=");
-		if (!val)
-			val = key + strlen(key);
-		key = strstrip(key);
-		val = strstrip(val);
-	} else
-		key = strstrip(key);
-
-	if (!strlen(key)) {
-		printk(KERN_ERR "CUSE: zero length info key specified\n");
-		return -EINVAL;
-	}
-
-	*pp = p;
-	*keyp = key;
-	if (valp)
-		*valp = val;
-
-	return 1;
-}
-
-/**
- * cuse_parse_dev_info - parse device info
- * @p: device info string
- * @len: length of device info string
- * @devinfo: out parameter for parsed device info
- *
- * Parse @p to extract device info and store it into @devinfo.  String
- * pointed to by @p is modified by parsing and @devinfo points into
- * them, so @p shouldn't be freed while @devinfo is in use.
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-static int cuse_parse_devinfo(char *p, size_t len, struct cuse_devinfo *devinfo)
-{
-	char *end = p + len;
-	char *key, *val;
-	int rc;
-
-	while (true) {
-		rc = cuse_parse_one(&p, end, &key, &val);
-		if (rc < 0)
-			return rc;
-		if (!rc)
-			break;
-		if (strcmp(key, "DEVNAME") == 0)
-			devinfo->name = val;
-		else
-			printk(KERN_WARNING "CUSE: unknown device info \"%s\"\n",
-			       key);
-	}
-
-	if (!devinfo->name || !strlen(devinfo->name)) {
-		printk(KERN_ERR "CUSE: DEVNAME unspecified\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static void cuse_gendev_release(struct device *dev)
-{
-	kfree(dev);
-}
-
-/**
- * cuse_process_init_reply - finish initializing CUSE channel
- *
- * This function creates the character device and sets up all the
- * required data structures for it.  Please read the comment at the
- * top of this file for high level overview.
- */
-static void cuse_process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
-{
-	struct cuse_conn *cc = fc_to_cc(fc);
-	struct cuse_init_out *arg = req->out.args[0].value;
-	struct page *page = req->pages[0];
-	struct cuse_devinfo devinfo = { };
-	struct device *dev;
-	struct cdev *cdev;
-	dev_t devt;
-	int rc;
-
-	if (req->out.h.error ||
-	    arg->major != FUSE_KERNEL_VERSION || arg->minor < 11) {
-		goto err;
-	}
-
-	fc->minor = arg->minor;
-	fc->max_read = max_t(unsigned, arg->max_read, 4096);
-	fc->max_write = max_t(unsigned, arg->max_write, 4096);
-
-	/* parse init reply */
-	cc->unrestricted_ioctl = arg->flags & CUSE_UNRESTRICTED_IOCTL;
-
-	rc = cuse_parse_devinfo(page_address(page), req->out.args[1].size,
-				&devinfo);
-	if (rc)
-		goto err;
-
-	/* determine and reserve devt */
-	devt = MKDEV(arg->dev_major, arg->dev_minor);
-	if (!MAJOR(devt))
-		rc = alloc_chrdev_region(&devt, MINOR(devt), 1, devinfo.name);
-	else
-		rc = register_chrdev_region(devt, 1, devinfo.name);
-	if (rc) {
-		printk(KERN_ERR "CUSE: failed to register chrdev region\n");
-		goto err;
-	}
-
-	/* devt determined, create device */
-	rc = -ENOMEM;
-	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
-	if (!dev)
-		goto err_region;
-
-	device_initialize(dev);
-	dev_set_uevent_suppress(dev, 1);
-	dev->class = cuse_class;
-	dev->devt = devt;
-	dev->release = cuse_gendev_release;
-	dev_set_drvdata(dev, cc);
-	dev_set_name(dev, "%s", devinfo.name);
-
-	rc = device_add(dev);
-	if (rc)
-		goto err_device;
-
-	/* register cdev */
-	rc = -ENOMEM;
-	cdev = cdev_alloc();
-	if (!cdev)
-		goto err_device;
-
-	cdev->owner = THIS_MODULE;
-	cdev->ops = &cuse_frontend_fops;
-
-	rc = cdev_add(cdev, devt, 1);
-	if (rc)
-		goto err_cdev;
-
-	cc->dev = dev;
-	cc->cdev = cdev;
-
-	/* make the device available */
-	spin_lock(&cuse_lock);
-	list_add(&cc->list, cuse_conntbl_head(devt));
-	spin_unlock(&cuse_lock);
-
-	/* announce device availability */
-	dev_set_uevent_suppress(dev, 0);
-	kobject_uevent(&dev->kobj, KOBJ_ADD);
-out:
-	kfree(arg);
-	__free_page(page);
-	return;
-
-err_cdev:
-	cdev_del(cdev);
-err_device:
-	put_device(dev);
-err_region:
-	unregister_chrdev_region(devt, 1);
-err:
-	fc->conn_error = 1;
-	goto out;
-}
-
-static int cuse_send_init(struct cuse_conn *cc)
-{
-	int rc;
-	struct fuse_req *req;
-	struct page *page;
-	struct fuse_conn *fc = &cc->fc;
-	struct cuse_init_in *arg;
-	void *outarg;
-
-	BUILD_BUG_ON(CUSE_INIT_INFO_MAX > PAGE_SIZE);
-
-	req = fuse_get_req(fc);
-	if (IS_ERR(req)) {
-		rc = PTR_ERR(req);
-		goto err;
-	}
-
-	rc = -ENOMEM;
-	page = alloc_page(GFP_KERNEL | __GFP_ZERO);
-	if (!page)
-		goto err_put_req;
-
-	outarg = kzalloc(sizeof(struct cuse_init_out), GFP_KERNEL);
-	if (!outarg)
-		goto err_free_page;
-
-	arg = &req->misc.cuse_init_in;
-	arg->major = FUSE_KERNEL_VERSION;
-	arg->minor = FUSE_KERNEL_MINOR_VERSION;
-	arg->flags |= CUSE_UNRESTRICTED_IOCTL;
-	req->in.h.opcode = CUSE_INIT;
-	req->in.numargs = 1;
-	req->in.args[0].size = sizeof(struct cuse_init_in);
-	req->in.args[0].value = arg;
-	req->out.numargs = 2;
-	req->out.args[0].size = sizeof(struct cuse_init_out);
-	req->out.args[0].value = outarg;
-	req->out.args[1].size = CUSE_INIT_INFO_MAX;
-	req->out.argvar = 1;
-	req->out.argpages = 1;
-	req->pages[0] = page;
-	req->num_pages = 1;
-	req->end = cuse_process_init_reply;
-	fuse_request_send_background(fc, req);
-
-	return 0;
-
-err_free_page:
-	__free_page(page);
-err_put_req:
-	fuse_put_request(fc, req);
-err:
-	return rc;
-}
-
-static void cuse_fc_release(struct fuse_conn *fc)
-{
-	struct cuse_conn *cc = fc_to_cc(fc);
-	kfree(cc);
-}
-
-/**
- * cuse_channel_open - open method for /dev/cuse
- * @inode: inode for /dev/cuse
- * @file: file struct being opened
- *
- * Userland CUSE server can create a CUSE device by opening /dev/cuse
- * and replying to the initialization request kernel sends.  This
- * function is responsible for handling CUSE device initialization.
- * Because the fd opened by this function is used during
- * initialization, this function only creates cuse_conn and sends
- * init.  The rest is delegated to a kthread.
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-static int cuse_channel_open(struct inode *inode, struct file *file)
-{
-	struct cuse_conn *cc;
-	int rc;
-
-	/* set up cuse_conn */
-	cc = kzalloc(sizeof(*cc), GFP_KERNEL);
-	if (!cc)
-		return -ENOMEM;
-
-	fuse_conn_init(&cc->fc);
-
-	INIT_LIST_HEAD(&cc->list);
-	cc->fc.release = cuse_fc_release;
-
-	cc->fc.connected = 1;
-	cc->fc.blocked = 0;
-	rc = cuse_send_init(cc);
-	if (rc) {
-		fuse_conn_put(&cc->fc);
-		return rc;
-	}
-	file->private_data = &cc->fc;	/* channel owns base reference to cc */
-
-	return 0;
-}
-
-/**
- * cuse_channel_release - release method for /dev/cuse
- * @inode: inode for /dev/cuse
- * @file: file struct being closed
- *
- * Disconnect the channel, deregister CUSE device and initiate
- * destruction by putting the default reference.
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-static int cuse_channel_release(struct inode *inode, struct file *file)
-{
-	struct cuse_conn *cc = fc_to_cc(file->private_data);
-	int rc;
-
-	/* remove from the conntbl, no more access from this point on */
-	spin_lock(&cuse_lock);
-	list_del_init(&cc->list);
-	spin_unlock(&cuse_lock);
-
-	/* remove device */
-	if (cc->dev)
-		device_unregister(cc->dev);
-	if (cc->cdev) {
-		unregister_chrdev_region(cc->cdev->dev, 1);
-		cdev_del(cc->cdev);
-	}
-
-	/* kill connection and shutdown channel */
-	fuse_conn_kill(&cc->fc);
-	rc = fuse_dev_release(inode, file);	/* puts the base reference */
-
-	return rc;
-}
-
-static struct file_operations cuse_channel_fops; /* initialized during init */
-
-
-/**************************************************************************
- * Misc stuff and module initializatiion
- *
- * CUSE exports the same set of attributes to sysfs as fusectl.
- */
-
-static ssize_t cuse_class_waiting_show(struct device *dev,
-				       struct device_attribute *attr, char *buf)
-{
-	struct cuse_conn *cc = dev_get_drvdata(dev);
-
-	return sprintf(buf, "%d\n", atomic_read(&cc->fc.num_waiting));
-}
-
-static ssize_t cuse_class_abort_store(struct device *dev,
-				      struct device_attribute *attr,
-				      const char *buf, size_t count)
-{
-	struct cuse_conn *cc = dev_get_drvdata(dev);
-
-	fuse_abort_conn(&cc->fc);
-	return count;
-}
-
-static struct device_attribute cuse_class_dev_attrs[] = {
-	__ATTR(waiting, S_IFREG | 0400, cuse_class_waiting_show, NULL),
-	__ATTR(abort, S_IFREG | 0200, NULL, cuse_class_abort_store),
-	{ }
-};
-
-static struct miscdevice cuse_miscdev = {
-	.minor		= MISC_DYNAMIC_MINOR,
-	.name		= "cuse",
-	.fops		= &cuse_channel_fops,
-};
-
-static int __init cuse_init(void)
-{
-	int i, rc;
-
-	/* init conntbl */
-	for (i = 0; i < CUSE_CONNTBL_LEN; i++)
-		INIT_LIST_HEAD(&cuse_conntbl[i]);
-
-	/* inherit and extend fuse_dev_operations */
-	cuse_channel_fops		= fuse_dev_operations;
-	cuse_channel_fops.owner		= THIS_MODULE;
-	cuse_channel_fops.open		= cuse_channel_open;
-	cuse_channel_fops.release	= cuse_channel_release;
-
-	cuse_class = class_create(THIS_MODULE, "cuse");
-	if (IS_ERR(cuse_class))
-		return PTR_ERR(cuse_class);
-
-	cuse_class->dev_attrs = cuse_class_dev_attrs;
-
-	rc = misc_register(&cuse_miscdev);
-	if (rc) {
-		class_destroy(cuse_class);
-		return rc;
-	}
-
-	return 0;
-}
-
-static void __exit cuse_exit(void)
-{
-	misc_deregister(&cuse_miscdev);
-	class_destroy(cuse_class);
-}
-
-module_init(cuse_init);
-module_exit(cuse_exit);
-
-MODULE_AUTHOR("Tejun Heo <tj@kernel.org>");
-MODULE_DESCRIPTION("Character device in Userspace");
-MODULE_LICENSE("GPL");