1 files changed, 0 insertions, 455 deletions
diff --git a/ANDROID_3.4.5/drivers/base/devtmpfs.c b/ANDROID_3.4.5/drivers/base/devtmpfs.c
deleted file mode 100644
index 8493536e..00000000
--- a/ANDROID_3.4.5/drivers/base/devtmpfs.c
+++ /dev/null
@@ -1,455 +0,0 @@
-/*
- * devtmpfs - kernel-maintained tmpfs-based /dev
- *
- * Copyright (C) 2009, Kay Sievers <kay.sievers@vrfy.org>
- *
- * During bootup, before any driver core device is registered,
- * devtmpfs, a tmpfs-based filesystem is created. Every driver-core
- * device which requests a device node, will add a node in this
- * filesystem.
- * By default, all devices are named after the the name of the
- * device, owned by root and have a default mode of 0600. Subsystems
- * can overwrite the default setting if needed.
- */
-
-#include <linux/kernel.h>
-#include <linux/syscalls.h>
-#include <linux/mount.h>
-#include <linux/device.h>
-#include <linux/genhd.h>
-#include <linux/namei.h>
-#include <linux/fs.h>
-#include <linux/shmem_fs.h>
-#include <linux/ramfs.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/kthread.h>
-
-static struct task_struct *thread;
-
-#if defined CONFIG_DEVTMPFS_MOUNT
-static int mount_dev = 1;
-#else
-static int mount_dev;
-#endif
-
-static DEFINE_SPINLOCK(req_lock);
-
-static struct req {
-	struct req *next;
-	struct completion done;
-	int err;
-	const char *name;
-	umode_t mode;	/* 0 => delete */
-	struct device *dev;
-} *requests;
-
-static int __init mount_param(char *str)
-{
-	mount_dev = simple_strtoul(str, NULL, 0);
-	return 1;
-}
-__setup("devtmpfs.mount=", mount_param);
-
-static struct dentry *dev_mount(struct file_system_type *fs_type, int flags,
-		      const char *dev_name, void *data)
-{
-#ifdef CONFIG_TMPFS
-	return mount_single(fs_type, flags, data, shmem_fill_super);
-#else
-	return mount_single(fs_type, flags, data, ramfs_fill_super);
-#endif
-}
-
-static struct file_system_type dev_fs_type = {
-	.name = "devtmpfs",
-	.mount = dev_mount,
-	.kill_sb = kill_litter_super,
-};
-
-#ifdef CONFIG_BLOCK
-static inline int is_blockdev(struct device *dev)
-{
-	return dev->class == &block_class;
-}
-#else
-static inline int is_blockdev(struct device *dev) { return 0; }
-#endif
-
-int devtmpfs_create_node(struct device *dev)
-{
-	const char *tmp = NULL;
-	struct req req;
-
-	if (!thread)
-		return 0;
-
-	req.mode = 0;
-	req.name = device_get_devnode(dev, &req.mode, &tmp);
-	if (!req.name)
-		return -ENOMEM;
-
-	if (req.mode == 0)
-		req.mode = 0600;
-	if (is_blockdev(dev))
-		req.mode |= S_IFBLK;
-	else
-		req.mode |= S_IFCHR;
-
-	req.dev = dev;
-
-	init_completion(&req.done);
-
-	spin_lock(&req_lock);
-	req.next = requests;
-	requests = &req;
-	spin_unlock(&req_lock);
-
-	wake_up_process(thread);
-	wait_for_completion(&req.done);
-
-	kfree(tmp);
-
-	return req.err;
-}
-
-int devtmpfs_delete_node(struct device *dev)
-{
-	const char *tmp = NULL;
-	struct req req;
-
-	if (!thread)
-		return 0;
-
-	req.name = device_get_devnode(dev, NULL, &tmp);
-	if (!req.name)
-		return -ENOMEM;
-
-	req.mode = 0;
-	req.dev = dev;
-
-	init_completion(&req.done);
-
-	spin_lock(&req_lock);
-	req.next = requests;
-	requests = &req;
-	spin_unlock(&req_lock);
-
-	wake_up_process(thread);
-	wait_for_completion(&req.done);
-
-	kfree(tmp);
-	return req.err;
-}
-
-static int dev_mkdir(const char *name, umode_t mode)
-{
-	struct dentry *dentry;
-	struct path path;
-	int err;
-
-	dentry = kern_path_create(AT_FDCWD, name, &path, 1);
-	if (IS_ERR(dentry))
-		return PTR_ERR(dentry);
-
-	err = vfs_mkdir(path.dentry->d_inode, dentry, mode);
-	if (!err)
-		/* mark as kernel-created inode */
-		dentry->d_inode->i_private = &thread;
-	dput(dentry);
-	mutex_unlock(&path.dentry->d_inode->i_mutex);
-	path_put(&path);
-	return err;
-}
-
-static int create_path(const char *nodepath)
-{
-	char *path;
-	char *s;
-	int err = 0;
-
-	/* parent directories do not exist, create them */
-	path = kstrdup(nodepath, GFP_KERNEL);
-	if (!path)
-		return -ENOMEM;
-
-	s = path;
-	for (;;) {
-		s = strchr(s, '/');
-		if (!s)
-			break;
-		s[0] = '\0';
-		err = dev_mkdir(path, 0755);
-		if (err && err != -EEXIST)
-			break;
-		s[0] = '/';
-		s++;
-	}
-	kfree(path);
-	return err;
-}
-
-static int handle_create(const char *nodename, umode_t mode, struct device *dev)
-{
-	struct dentry *dentry;
-	struct path path;
-	int err;
-
-	dentry = kern_path_create(AT_FDCWD, nodename, &path, 0);
-	if (dentry == ERR_PTR(-ENOENT)) {
-		create_path(nodename);
-		dentry = kern_path_create(AT_FDCWD, nodename, &path, 0);
-	}
-	if (IS_ERR(dentry))
-		return PTR_ERR(dentry);
-
-	err = vfs_mknod(path.dentry->d_inode,
-			dentry, mode, dev->devt);
-	if (!err) {
-		struct iattr newattrs;
-
-		/* fixup possibly umasked mode */
-		newattrs.ia_mode = mode;
-		newattrs.ia_valid = ATTR_MODE;
-		mutex_lock(&dentry->d_inode->i_mutex);
-		notify_change(dentry, &newattrs);
-		mutex_unlock(&dentry->d_inode->i_mutex);
-
-		/* mark as kernel-created inode */
-		dentry->d_inode->i_private = &thread;
-	}
-	dput(dentry);
-
-	mutex_unlock(&path.dentry->d_inode->i_mutex);
-	path_put(&path);
-	return err;
-}
-
-static int dev_rmdir(const char *name)
-{
-	struct nameidata nd;
-	struct dentry *dentry;
-	int err;
-
-	err = kern_path_parent(name, &nd);
-	if (err)
-		return err;
-
-	mutex_lock_nested(&nd.path.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
-	dentry = lookup_one_len(nd.last.name, nd.path.dentry, nd.last.len);
-	if (!IS_ERR(dentry)) {
-		if (dentry->d_inode) {
-			if (dentry->d_inode->i_private == &thread)
-				err = vfs_rmdir(nd.path.dentry->d_inode,
-						dentry);
-			else
-				err = -EPERM;
-		} else {
-			err = -ENOENT;
-		}
-		dput(dentry);
-	} else {
-		err = PTR_ERR(dentry);
-	}
-
-	mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
-	path_put(&nd.path);
-	return err;
-}
-
-static int delete_path(const char *nodepath)
-{
-	const char *path;
-	int err = 0;
-
-	path = kstrdup(nodepath, GFP_KERNEL);
-	if (!path)
-		return -ENOMEM;
-
-	for (;;) {
-		char *base;
-
-		base = strrchr(path, '/');
-		if (!base)
-			break;
-		base[0] = '\0';
-		err = dev_rmdir(path);
-		if (err)
-			break;
-	}
-
-	kfree(path);
-	return err;
-}
-
-static int dev_mynode(struct device *dev, struct inode *inode, struct kstat *stat)
-{
-	/* did we create it */
-	if (inode->i_private != &thread)
-		return 0;
-
-	/* does the dev_t match */
-	if (is_blockdev(dev)) {
-		if (!S_ISBLK(stat->mode))
-			return 0;
-	} else {
-		if (!S_ISCHR(stat->mode))
-			return 0;
-	}
-	if (stat->rdev != dev->devt)
-		return 0;
-
-	/* ours */
-	return 1;
-}
-
-static int handle_remove(const char *nodename, struct device *dev)
-{
-	struct nameidata nd;
-	struct dentry *dentry;
-	struct kstat stat;
-	int deleted = 1;
-	int err;
-
-	err = kern_path_parent(nodename, &nd);
-	if (err)
-		return err;
-
-	mutex_lock_nested(&nd.path.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
-	dentry = lookup_one_len(nd.last.name, nd.path.dentry, nd.last.len);
-	if (!IS_ERR(dentry)) {
-		if (dentry->d_inode) {
-			err = vfs_getattr(nd.path.mnt, dentry, &stat);
-			if (!err && dev_mynode(dev, dentry->d_inode, &stat)) {
-				struct iattr newattrs;
-				/*
-				 * before unlinking this node, reset permissions
-				 * of possible references like hardlinks
-				 */
-				newattrs.ia_uid = 0;
-				newattrs.ia_gid = 0;
-				newattrs.ia_mode = stat.mode & ~0777;
-				newattrs.ia_valid =
-					ATTR_UID|ATTR_GID|ATTR_MODE;
-				mutex_lock(&dentry->d_inode->i_mutex);
-				notify_change(dentry, &newattrs);
-				mutex_unlock(&dentry->d_inode->i_mutex);
-				err = vfs_unlink(nd.path.dentry->d_inode,
-						 dentry);
-				if (!err || err == -ENOENT)
-					deleted = 1;
-			}
-		} else {
-			err = -ENOENT;
-		}
-		dput(dentry);
-	} else {
-		err = PTR_ERR(dentry);
-	}
-	mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
-
-	path_put(&nd.path);
-	if (deleted && strchr(nodename, '/'))
-		delete_path(nodename);
-	return err;
-}
-
-/*
- * If configured, or requested by the commandline, devtmpfs will be
- * auto-mounted after the kernel mounted the root filesystem.
- */
-int devtmpfs_mount(const char *mntdir)
-{
-	int err;
-
-	if (!mount_dev)
-		return 0;
-
-	if (!thread)
-		return 0;
-
-	err = sys_mount("devtmpfs", (char *)mntdir, "devtmpfs", MS_SILENT, NULL);
-	if (err)
-		printk(KERN_INFO "devtmpfs: error mounting %i\n", err);
-	else
-		printk(KERN_INFO "devtmpfs: mounted\n");
-	return err;
-}
-
-static DECLARE_COMPLETION(setup_done);
-
-static int handle(const char *name, umode_t mode, struct device *dev)
-{
-	if (mode)
-		return handle_create(name, mode, dev);
-	else
-		return handle_remove(name, dev);
-}
-
-static int devtmpfsd(void *p)
-{
-	char options[] = "mode=0755";
-	int *err = p;
-	*err = sys_unshare(CLONE_NEWNS);
-	if (*err)
-		goto out;
-	*err = sys_mount("devtmpfs", "/", "devtmpfs", MS_SILENT, options);
-	if (*err)
-		goto out;
-	sys_chdir("/.."); /* will traverse into overmounted root */
-	sys_chroot(".");
-	complete(&setup_done);
-	while (1) {
-		spin_lock(&req_lock);
-		while (requests) {
-			struct req *req = requests;
-			requests = NULL;
-			spin_unlock(&req_lock);
-			while (req) {
-				struct req *next = req->next;
-				req->err = handle(req->name, req->mode, req->dev);
-				complete(&req->done);
-				req = next;
-			}
-			spin_lock(&req_lock);
-		}
-		__set_current_state(TASK_INTERRUPTIBLE);
-		spin_unlock(&req_lock);
-		schedule();
-	}
-	return 0;
-out:
-	complete(&setup_done);
-	return *err;
-}
-
-/*
- * Create devtmpfs instance, driver-core devices will add their device
- * nodes here.
- */
-int __init devtmpfs_init(void)
-{
-	int err = register_filesystem(&dev_fs_type);
-	if (err) {
-		printk(KERN_ERR "devtmpfs: unable to register devtmpfs "
-		       "type %i\n", err);
-		return err;
-	}
-
-	thread = kthread_run(devtmpfsd, &err, "kdevtmpfs");
-	if (!IS_ERR(thread)) {
-		wait_for_completion(&setup_done);
-	} else {
-		err = PTR_ERR(thread);
-		thread = NULL;
-	}
-
-	if (err) {
-		printk(KERN_ERR "devtmpfs: unable to create devtmpfs %i\n", err);
-		unregister_filesystem(&dev_fs_type);
-		return err;
-	}
-
-	printk(KERN_INFO "devtmpfs: initialized\n");
-	return 0;
-}