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, 567 deletions

diff --git a/ANDROID_3.4.5/fs/ecryptfs/miscdev.c b/ANDROID_3.4.5/fs/ecryptfs/miscdev.c
deleted file mode 100644
index c0038f65..00000000
--- a/ANDROID_3.4.5/fs/ecryptfs/miscdev.c
+++ /dev/null
@@ -1,567 +0,0 @@
-/**
- * eCryptfs: Linux filesystem encryption layer
- *
- * Copyright (C) 2008 International Business Machines Corp.
- *   Author(s): Michael A. Halcrow <mhalcrow@us.ibm.com>
- *
- * 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.
- *
- * 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
- * 02111-1307, USA.
- */
-
-#include <linux/fs.h>
-#include <linux/hash.h>
-#include <linux/random.h>
-#include <linux/miscdevice.h>
-#include <linux/poll.h>
-#include <linux/slab.h>
-#include <linux/wait.h>
-#include <linux/module.h>
-#include "ecryptfs_kernel.h"
-
-static atomic_t ecryptfs_num_miscdev_opens;
-
-/**
- * ecryptfs_miscdev_poll
- * @file: dev file (ignored)
- * @pt: dev poll table (ignored)
- *
- * Returns the poll mask
- */
-static unsigned int
-ecryptfs_miscdev_poll(struct file *file, poll_table *pt)
-{
-	struct ecryptfs_daemon *daemon;
-	unsigned int mask = 0;
-	uid_t euid = current_euid();
-	int rc;
-
-	mutex_lock(&ecryptfs_daemon_hash_mux);
-	/* TODO: Just use file->private_data? */
-	rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current_user_ns());
-	if (rc || !daemon) {
-		mutex_unlock(&ecryptfs_daemon_hash_mux);
-		return -EINVAL;
-	}
-	mutex_lock(&daemon->mux);
-	mutex_unlock(&ecryptfs_daemon_hash_mux);
-	if (daemon->flags & ECRYPTFS_DAEMON_ZOMBIE) {
-		printk(KERN_WARNING "%s: Attempt to poll on zombified "
-		       "daemon\n", __func__);
-		goto out_unlock_daemon;
-	}
-	if (daemon->flags & ECRYPTFS_DAEMON_IN_READ)
-		goto out_unlock_daemon;
-	if (daemon->flags & ECRYPTFS_DAEMON_IN_POLL)
-		goto out_unlock_daemon;
-	daemon->flags |= ECRYPTFS_DAEMON_IN_POLL;
-	mutex_unlock(&daemon->mux);
-	poll_wait(file, &daemon->wait, pt);
-	mutex_lock(&daemon->mux);
-	if (!list_empty(&daemon->msg_ctx_out_queue))
-		mask |= POLLIN | POLLRDNORM;
-out_unlock_daemon:
-	daemon->flags &= ~ECRYPTFS_DAEMON_IN_POLL;
-	mutex_unlock(&daemon->mux);
-	return mask;
-}
-
-/**
- * ecryptfs_miscdev_open
- * @inode: inode of miscdev handle (ignored)
- * @file: file for miscdev handle (ignored)
- *
- * Returns zero on success; non-zero otherwise
- */
-static int
-ecryptfs_miscdev_open(struct inode *inode, struct file *file)
-{
-	struct ecryptfs_daemon *daemon = NULL;
-	uid_t euid = current_euid();
-	int rc;
-
-	mutex_lock(&ecryptfs_daemon_hash_mux);
-	rc = try_module_get(THIS_MODULE);
-	if (rc == 0) {
-		rc = -EIO;
-		printk(KERN_ERR "%s: Error attempting to increment module use "
-		       "count; rc = [%d]\n", __func__, rc);
-		goto out_unlock_daemon_list;
-	}
-	rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current_user_ns());
-	if (rc || !daemon) {
-		rc = ecryptfs_spawn_daemon(&daemon, euid, current_user_ns(),
-					   task_pid(current));
-		if (rc) {
-			printk(KERN_ERR "%s: Error attempting to spawn daemon; "
-			       "rc = [%d]\n", __func__, rc);
-			goto out_module_put_unlock_daemon_list;
-		}
-	}
-	mutex_lock(&daemon->mux);
-	if (daemon->pid != task_pid(current)) {
-		rc = -EINVAL;
-		printk(KERN_ERR "%s: pid [0x%p] has registered with euid [%d], "
-		       "but pid [0x%p] has attempted to open the handle "
-		       "instead\n", __func__, daemon->pid, daemon->euid,
-		       task_pid(current));
-		goto out_unlock_daemon;
-	}
-	if (daemon->flags & ECRYPTFS_DAEMON_MISCDEV_OPEN) {
-		rc = -EBUSY;
-		printk(KERN_ERR "%s: Miscellaneous device handle may only be "
-		       "opened once per daemon; pid [0x%p] already has this "
-		       "handle open\n", __func__, daemon->pid);
-		goto out_unlock_daemon;
-	}
-	daemon->flags |= ECRYPTFS_DAEMON_MISCDEV_OPEN;
-	file->private_data = daemon;
-	atomic_inc(&ecryptfs_num_miscdev_opens);
-out_unlock_daemon:
-	mutex_unlock(&daemon->mux);
-out_module_put_unlock_daemon_list:
-	if (rc)
-		module_put(THIS_MODULE);
-out_unlock_daemon_list:
-	mutex_unlock(&ecryptfs_daemon_hash_mux);
-	return rc;
-}
-
-/**
- * ecryptfs_miscdev_release
- * @inode: inode of fs/ecryptfs/euid handle (ignored)
- * @file: file for fs/ecryptfs/euid handle (ignored)
- *
- * This keeps the daemon registered until the daemon sends another
- * ioctl to fs/ecryptfs/ctl or until the kernel module unregisters.
- *
- * Returns zero on success; non-zero otherwise
- */
-static int
-ecryptfs_miscdev_release(struct inode *inode, struct file *file)
-{
-	struct ecryptfs_daemon *daemon = NULL;
-	uid_t euid = current_euid();
-	int rc;
-
-	mutex_lock(&ecryptfs_daemon_hash_mux);
-	rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current_user_ns());
-	if (rc || !daemon)
-		daemon = file->private_data;
-	mutex_lock(&daemon->mux);
-	BUG_ON(!(daemon->flags & ECRYPTFS_DAEMON_MISCDEV_OPEN));
-	daemon->flags &= ~ECRYPTFS_DAEMON_MISCDEV_OPEN;
-	atomic_dec(&ecryptfs_num_miscdev_opens);
-	mutex_unlock(&daemon->mux);
-	rc = ecryptfs_exorcise_daemon(daemon);
-	if (rc) {
-		printk(KERN_CRIT "%s: Fatal error whilst attempting to "
-		       "shut down daemon; rc = [%d]. Please report this "
-		       "bug.\n", __func__, rc);
-		BUG();
-	}
-	module_put(THIS_MODULE);
-	mutex_unlock(&ecryptfs_daemon_hash_mux);
-	return rc;
-}
-
-/**
- * ecryptfs_send_miscdev
- * @data: Data to send to daemon; may be NULL
- * @data_size: Amount of data to send to daemon
- * @msg_ctx: Message context, which is used to handle the reply. If
- *           this is NULL, then we do not expect a reply.
- * @msg_type: Type of message
- * @msg_flags: Flags for message
- * @daemon: eCryptfs daemon object
- *
- * Add msg_ctx to queue and then, if it exists, notify the blocked
- * miscdevess about the data being available. Must be called with
- * ecryptfs_daemon_hash_mux held.
- *
- * Returns zero on success; non-zero otherwise
- */
-int ecryptfs_send_miscdev(char *data, size_t data_size,
-			  struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type,
-			  u16 msg_flags, struct ecryptfs_daemon *daemon)
-{
-	struct ecryptfs_message *msg;
-
-	msg = kmalloc((sizeof(*msg) + data_size), GFP_KERNEL);
-	if (!msg) {
-		printk(KERN_ERR "%s: Out of memory whilst attempting "
-		       "to kmalloc(%zd, GFP_KERNEL)\n", __func__,
-		       (sizeof(*msg) + data_size));
-		return -ENOMEM;
-	}
-
-	mutex_lock(&msg_ctx->mux);
-	msg_ctx->msg = msg;
-	msg_ctx->msg->index = msg_ctx->index;
-	msg_ctx->msg->data_len = data_size;
-	msg_ctx->type = msg_type;
-	memcpy(msg_ctx->msg->data, data, data_size);
-	msg_ctx->msg_size = (sizeof(*msg_ctx->msg) + data_size);
-	list_add_tail(&msg_ctx->daemon_out_list, &daemon->msg_ctx_out_queue);
-	mutex_unlock(&msg_ctx->mux);
-
-	mutex_lock(&daemon->mux);
-	daemon->num_queued_msg_ctx++;
-	wake_up_interruptible(&daemon->wait);
-	mutex_unlock(&daemon->mux);
-
-	return 0;
-}
-
-/*
- * miscdevfs packet format:
- *  Octet 0: Type
- *  Octets 1-4: network byte order msg_ctx->counter
- *  Octets 5-N0: Size of struct ecryptfs_message to follow
- *  Octets N0-N1: struct ecryptfs_message (including data)
- *
- *  Octets 5-N1 not written if the packet type does not include a message
- */
-#define PKT_TYPE_SIZE		1
-#define PKT_CTR_SIZE		4
-#define MIN_NON_MSG_PKT_SIZE	(PKT_TYPE_SIZE + PKT_CTR_SIZE)
-#define MIN_MSG_PKT_SIZE	(PKT_TYPE_SIZE + PKT_CTR_SIZE \
-				 + ECRYPTFS_MIN_PKT_LEN_SIZE)
-/* 4 + ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES comes from tag 65 packet format */
-#define MAX_MSG_PKT_SIZE	(PKT_TYPE_SIZE + PKT_CTR_SIZE \
-				 + ECRYPTFS_MAX_PKT_LEN_SIZE \
-				 + sizeof(struct ecryptfs_message) \
-				 + 4 + ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES)
-#define PKT_TYPE_OFFSET		0
-#define PKT_CTR_OFFSET		PKT_TYPE_SIZE
-#define PKT_LEN_OFFSET		(PKT_TYPE_SIZE + PKT_CTR_SIZE)
-
-/**
- * ecryptfs_miscdev_read - format and send message from queue
- * @file: fs/ecryptfs/euid miscdevfs handle (ignored)
- * @buf: User buffer into which to copy the next message on the daemon queue
- * @count: Amount of space available in @buf
- * @ppos: Offset in file (ignored)
- *
- * Pulls the most recent message from the daemon queue, formats it for
- * being sent via a miscdevfs handle, and copies it into @buf
- *
- * Returns the number of bytes copied into the user buffer
- */
-static ssize_t
-ecryptfs_miscdev_read(struct file *file, char __user *buf, size_t count,
-		      loff_t *ppos)
-{
-	struct ecryptfs_daemon *daemon;
-	struct ecryptfs_msg_ctx *msg_ctx;
-	size_t packet_length_size;
-	char packet_length[ECRYPTFS_MAX_PKT_LEN_SIZE];
-	size_t i;
-	size_t total_length;
-	uid_t euid = current_euid();
-	int rc;
-
-	mutex_lock(&ecryptfs_daemon_hash_mux);
-	/* TODO: Just use file->private_data? */
-	rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current_user_ns());
-	if (rc || !daemon) {
-		mutex_unlock(&ecryptfs_daemon_hash_mux);
-		return -EINVAL;
-	}
-	mutex_lock(&daemon->mux);
-	if (task_pid(current) != daemon->pid) {
-		mutex_unlock(&daemon->mux);
-		mutex_unlock(&ecryptfs_daemon_hash_mux);
-		return -EPERM;
-	}
-	if (daemon->flags & ECRYPTFS_DAEMON_ZOMBIE) {
-		rc = 0;
-		mutex_unlock(&ecryptfs_daemon_hash_mux);
-		printk(KERN_WARNING "%s: Attempt to read from zombified "
-		       "daemon\n", __func__);
-		goto out_unlock_daemon;
-	}
-	if (daemon->flags & ECRYPTFS_DAEMON_IN_READ) {
-		rc = 0;
-		mutex_unlock(&ecryptfs_daemon_hash_mux);
-		goto out_unlock_daemon;
-	}
-	/* This daemon will not go away so long as this flag is set */
-	daemon->flags |= ECRYPTFS_DAEMON_IN_READ;
-	mutex_unlock(&ecryptfs_daemon_hash_mux);
-check_list:
-	if (list_empty(&daemon->msg_ctx_out_queue)) {
-		mutex_unlock(&daemon->mux);
-		rc = wait_event_interruptible(
-			daemon->wait, !list_empty(&daemon->msg_ctx_out_queue));
-		mutex_lock(&daemon->mux);
-		if (rc < 0) {
-			rc = 0;
-			goto out_unlock_daemon;
-		}
-	}
-	if (daemon->flags & ECRYPTFS_DAEMON_ZOMBIE) {
-		rc = 0;
-		goto out_unlock_daemon;
-	}
-	if (list_empty(&daemon->msg_ctx_out_queue)) {
-		/* Something else jumped in since the
-		 * wait_event_interruptable() and removed the
-		 * message from the queue; try again */
-		goto check_list;
-	}
-	msg_ctx = list_first_entry(&daemon->msg_ctx_out_queue,
-				   struct ecryptfs_msg_ctx, daemon_out_list);
-	BUG_ON(!msg_ctx);
-	mutex_lock(&msg_ctx->mux);
-	if (msg_ctx->msg) {
-		rc = ecryptfs_write_packet_length(packet_length,
-						  msg_ctx->msg_size,
-						  &packet_length_size);
-		if (rc) {
-			rc = 0;
-			printk(KERN_WARNING "%s: Error writing packet length; "
-			       "rc = [%d]\n", __func__, rc);
-			goto out_unlock_msg_ctx;
-		}
-	} else {
-		packet_length_size = 0;
-		msg_ctx->msg_size = 0;
-	}
-	total_length = (PKT_TYPE_SIZE + PKT_CTR_SIZE + packet_length_size
-			+ msg_ctx->msg_size);
-	if (count < total_length) {
-		rc = 0;
-		printk(KERN_WARNING "%s: Only given user buffer of "
-		       "size [%zd], but we need [%zd] to read the "
-		       "pending message\n", __func__, count, total_length);
-		goto out_unlock_msg_ctx;
-	}
-	rc = -EFAULT;
-	if (put_user(msg_ctx->type, buf))
-		goto out_unlock_msg_ctx;
-	if (put_user(cpu_to_be32(msg_ctx->counter),
-		     (__be32 __user *)(&buf[PKT_CTR_OFFSET])))
-		goto out_unlock_msg_ctx;
-	i = PKT_TYPE_SIZE + PKT_CTR_SIZE;
-	if (msg_ctx->msg) {
-		if (copy_to_user(&buf[i], packet_length, packet_length_size))
-			goto out_unlock_msg_ctx;
-		i += packet_length_size;
-		if (copy_to_user(&buf[i], msg_ctx->msg, msg_ctx->msg_size))
-			goto out_unlock_msg_ctx;
-		i += msg_ctx->msg_size;
-	}
-	rc = i;
-	list_del(&msg_ctx->daemon_out_list);
-	kfree(msg_ctx->msg);
-	msg_ctx->msg = NULL;
-	/* We do not expect a reply from the userspace daemon for any
-	 * message type other than ECRYPTFS_MSG_REQUEST */
-	if (msg_ctx->type != ECRYPTFS_MSG_REQUEST)
-		ecryptfs_msg_ctx_alloc_to_free(msg_ctx);
-out_unlock_msg_ctx:
-	mutex_unlock(&msg_ctx->mux);
-out_unlock_daemon:
-	daemon->flags &= ~ECRYPTFS_DAEMON_IN_READ;
-	mutex_unlock(&daemon->mux);
-	return rc;
-}
-
-/**
- * ecryptfs_miscdev_response - miscdevess response to message previously sent to daemon
- * @data: Bytes comprising struct ecryptfs_message
- * @data_size: sizeof(struct ecryptfs_message) + data len
- * @euid: Effective user id of miscdevess sending the miscdev response
- * @user_ns: The namespace in which @euid applies
- * @pid: Miscdevess id of miscdevess sending the miscdev response
- * @seq: Sequence number for miscdev response packet
- *
- * Returns zero on success; non-zero otherwise
- */
-static int ecryptfs_miscdev_response(char *data, size_t data_size,
-				     uid_t euid, struct user_namespace *user_ns,
-				     struct pid *pid, u32 seq)
-{
-	struct ecryptfs_message *msg = (struct ecryptfs_message *)data;
-	int rc;
-
-	if ((sizeof(*msg) + msg->data_len) != data_size) {
-		printk(KERN_WARNING "%s: (sizeof(*msg) + msg->data_len) = "
-		       "[%zd]; data_size = [%zd]. Invalid packet.\n", __func__,
-		       (sizeof(*msg) + msg->data_len), data_size);
-		rc = -EINVAL;
-		goto out;
-	}
-	rc = ecryptfs_process_response(msg, euid, user_ns, pid, seq);
-	if (rc)
-		printk(KERN_ERR
-		       "Error processing response message; rc = [%d]\n", rc);
-out:
-	return rc;
-}
-
-/**
- * ecryptfs_miscdev_write - handle write to daemon miscdev handle
- * @file: File for misc dev handle (ignored)
- * @buf: Buffer containing user data
- * @count: Amount of data in @buf
- * @ppos: Pointer to offset in file (ignored)
- *
- * Returns the number of bytes read from @buf
- */
-static ssize_t
-ecryptfs_miscdev_write(struct file *file, const char __user *buf,
-		       size_t count, loff_t *ppos)
-{
-	__be32 counter_nbo;
-	u32 seq;
-	size_t packet_size, packet_size_length;
-	char *data;
-	uid_t euid = current_euid();
-	unsigned char packet_size_peek[ECRYPTFS_MAX_PKT_LEN_SIZE];
-	ssize_t rc;
-
-	if (count == 0) {
-		return 0;
-	} else if (count == MIN_NON_MSG_PKT_SIZE) {
-		/* Likely a harmless MSG_HELO or MSG_QUIT - no packet length */
-		goto memdup;
-	} else if (count < MIN_MSG_PKT_SIZE || count > MAX_MSG_PKT_SIZE) {
-		printk(KERN_WARNING "%s: Acceptable packet size range is "
-		       "[%d-%zu], but amount of data written is [%zu].",
-		       __func__, MIN_MSG_PKT_SIZE, MAX_MSG_PKT_SIZE, count);
-		return -EINVAL;
-	}
-
-	if (copy_from_user(packet_size_peek, &buf[PKT_LEN_OFFSET],
-			   sizeof(packet_size_peek))) {
-		printk(KERN_WARNING "%s: Error while inspecting packet size\n",
-		       __func__);
-		return -EFAULT;
-	}
-
-	rc = ecryptfs_parse_packet_length(packet_size_peek, &packet_size,
-					  &packet_size_length);
-	if (rc) {
-		printk(KERN_WARNING "%s: Error parsing packet length; "
-		       "rc = [%zd]\n", __func__, rc);
-		return rc;
-	}
-
-	if ((PKT_TYPE_SIZE + PKT_CTR_SIZE + packet_size_length + packet_size)
-	    != count) {
-		printk(KERN_WARNING "%s: Invalid packet size [%zu]\n", __func__,
-		       packet_size);
-		return -EINVAL;
-	}
-
-memdup:
-	data = memdup_user(buf, count);
-	if (IS_ERR(data)) {
-		printk(KERN_ERR "%s: memdup_user returned error [%ld]\n",
-		       __func__, PTR_ERR(data));
-		return PTR_ERR(data);
-	}
-	switch (data[PKT_TYPE_OFFSET]) {
-	case ECRYPTFS_MSG_RESPONSE:
-		if (count < (MIN_MSG_PKT_SIZE
-			     + sizeof(struct ecryptfs_message))) {
-			printk(KERN_WARNING "%s: Minimum acceptable packet "
-			       "size is [%zd], but amount of data written is "
-			       "only [%zd]. Discarding response packet.\n",
-			       __func__,
-			       (MIN_MSG_PKT_SIZE
-				+ sizeof(struct ecryptfs_message)), count);
-			rc = -EINVAL;
-			goto out_free;
-		}
-		memcpy(&counter_nbo, &data[PKT_CTR_OFFSET], PKT_CTR_SIZE);
-		seq = be32_to_cpu(counter_nbo);
-		rc = ecryptfs_miscdev_response(
-				&data[PKT_LEN_OFFSET + packet_size_length],
-				packet_size, euid, current_user_ns(),
-				task_pid(current), seq);
-		if (rc) {
-			printk(KERN_WARNING "%s: Failed to deliver miscdev "
-			       "response to requesting operation; rc = [%zd]\n",
-			       __func__, rc);
-			goto out_free;
-		}
-		break;
-	case ECRYPTFS_MSG_HELO:
-	case ECRYPTFS_MSG_QUIT:
-		break;
-	default:
-		ecryptfs_printk(KERN_WARNING, "Dropping miscdev "
-				"message of unrecognized type [%d]\n",
-				data[0]);
-		rc = -EINVAL;
-		goto out_free;
-	}
-	rc = count;
-out_free:
-	kfree(data);
-	return rc;
-}
-
-
-static const struct file_operations ecryptfs_miscdev_fops = {
-	.open    = ecryptfs_miscdev_open,
-	.poll    = ecryptfs_miscdev_poll,
-	.read    = ecryptfs_miscdev_read,
-	.write   = ecryptfs_miscdev_write,
-	.release = ecryptfs_miscdev_release,
-	.llseek  = noop_llseek,
-};
-
-static struct miscdevice ecryptfs_miscdev = {
-	.minor = MISC_DYNAMIC_MINOR,
-	.name  = "ecryptfs",
-	.fops  = &ecryptfs_miscdev_fops
-};
-
-/**
- * ecryptfs_init_ecryptfs_miscdev
- *
- * Messages sent to the userspace daemon from the kernel are placed on
- * a queue associated with the daemon. The next read against the
- * miscdev handle by that daemon will return the oldest message placed
- * on the message queue for the daemon.
- *
- * Returns zero on success; non-zero otherwise
- */
-int __init ecryptfs_init_ecryptfs_miscdev(void)
-{
-	int rc;
-
-	atomic_set(&ecryptfs_num_miscdev_opens, 0);
-	rc = misc_register(&ecryptfs_miscdev);
-	if (rc)
-		printk(KERN_ERR "%s: Failed to register miscellaneous device "
-		       "for communications with userspace daemons; rc = [%d]\n",
-		       __func__, rc);
-	return rc;
-}
-
-/**
- * ecryptfs_destroy_ecryptfs_miscdev
- *
- * All of the daemons must be exorcised prior to calling this
- * function.
- */
-void ecryptfs_destroy_ecryptfs_miscdev(void)
-{
-	BUG_ON(atomic_read(&ecryptfs_num_miscdev_opens) != 0);
-	misc_deregister(&ecryptfs_miscdev);
-}