[PATCH 07/10] autofs - delete fs/autofs4 source files

[Ian Kent <raven@themaw.net>]

Delete the now unused autofs4 module files.

Signed-off-by: Ian Kent <raven@themaw.net>
---
 fs/autofs4/autofs_i.h  |  273 --------------
 fs/autofs4/dev-ioctl.c |  761 ---------------------------------------
 fs/autofs4/expire.c    |  632 --------------------------------
 fs/autofs4/init.c      |   48 --
 fs/autofs4/inode.c     |  375 -------------------
 fs/autofs4/root.c      |  942 ------------------------------------------------
 fs/autofs4/symlink.c   |   29 -
 fs/autofs4/waitq.c     |  559 ----------------------------
 8 files changed, 3619 deletions(-)
 delete mode 100644 fs/autofs4/autofs_i.h
 delete mode 100644 fs/autofs4/dev-ioctl.c
 delete mode 100644 fs/autofs4/expire.c
 delete mode 100644 fs/autofs4/init.c
 delete mode 100644 fs/autofs4/inode.c
 delete mode 100644 fs/autofs4/root.c
 delete mode 100644 fs/autofs4/symlink.c
 delete mode 100644 fs/autofs4/waitq.c

diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
deleted file mode 100644
index 9110b66c7ef1..000000000000
--- a/fs/autofs4/autofs_i.h
+++ /dev/null
@@ -1,273 +0,0 @@
-/*
- *  Copyright 1997-1998 Transmeta Corporation - All Rights Reserved
- *  Copyright 2005-2006 Ian Kent <raven@themaw.net>
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- */
-
-/* Internal header file for autofs */
-
-#include <linux/auto_fs.h>
-#include <linux/auto_dev-ioctl.h>
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/time.h>
-#include <linux/string.h>
-#include <linux/wait.h>
-#include <linux/sched.h>
-#include <linux/mount.h>
-#include <linux/namei.h>
-#include <linux/uaccess.h>
-#include <linux/mutex.h>
-#include <linux/spinlock.h>
-#include <linux/list.h>
-#include <linux/completion.h>
-#include <asm/current.h>
-
-/* This is the range of ioctl() numbers we claim as ours */
-#define AUTOFS_IOC_FIRST     AUTOFS_IOC_READY
-#define AUTOFS_IOC_COUNT     32
-
-#define AUTOFS_DEV_IOCTL_IOC_FIRST	(AUTOFS_DEV_IOCTL_VERSION)
-#define AUTOFS_DEV_IOCTL_IOC_COUNT \
-	(AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD - AUTOFS_DEV_IOCTL_VERSION_CMD)
-
-#ifdef pr_fmt
-#undef pr_fmt
-#endif
-#define pr_fmt(fmt) KBUILD_MODNAME ":pid:%d:%s: " fmt, current->pid, __func__
-
-/*
- * Unified info structure.  This is pointed to by both the dentry and
- * inode structures.  Each file in the filesystem has an instance of this
- * structure.  It holds a reference to the dentry, so dentries are never
- * flushed while the file exists.  All name lookups are dealt with at the
- * dentry level, although the filesystem can interfere in the validation
- * process.  Readdir is implemented by traversing the dentry lists.
- */
-struct autofs_info {
-	struct dentry	*dentry;
-	struct inode	*inode;
-
-	int		flags;
-
-	struct completion expire_complete;
-
-	struct list_head active;
-	int active_count;
-
-	struct list_head expiring;
-
-	struct autofs_sb_info *sbi;
-	unsigned long last_used;
-	atomic_t count;
-
-	kuid_t uid;
-	kgid_t gid;
-};
-
-#define AUTOFS_INF_EXPIRING	(1<<0) /* dentry in the process of expiring */
-#define AUTOFS_INF_WANT_EXPIRE	(1<<1) /* the dentry is being considered
-					* for expiry, so RCU_walk is
-					* not permitted.  If it progresses to
-					* actual expiry attempt, the flag is
-					* not cleared when EXPIRING is set -
-					* in that case it gets cleared only
-					* when it comes to clearing EXPIRING.
-					*/
-#define AUTOFS_INF_PENDING	(1<<2) /* dentry pending mount */
-
-struct autofs_wait_queue {
-	wait_queue_head_t queue;
-	struct autofs_wait_queue *next;
-	autofs_wqt_t wait_queue_token;
-	/* We use the following to see what we are waiting for */
-	struct qstr name;
-	u32 dev;
-	u64 ino;
-	kuid_t uid;
-	kgid_t gid;
-	pid_t pid;
-	pid_t tgid;
-	/* This is for status reporting upon return */
-	int status;
-	unsigned int wait_ctr;
-};
-
-#define AUTOFS_SBI_MAGIC 0x6d4a556d
-
-struct autofs_sb_info {
-	u32 magic;
-	int pipefd;
-	struct file *pipe;
-	struct pid *oz_pgrp;
-	int catatonic;
-	int version;
-	int sub_version;
-	int min_proto;
-	int max_proto;
-	unsigned long exp_timeout;
-	unsigned int type;
-	struct super_block *sb;
-	struct mutex wq_mutex;
-	struct mutex pipe_mutex;
-	spinlock_t fs_lock;
-	struct autofs_wait_queue *queues; /* Wait queue pointer */
-	spinlock_t lookup_lock;
-	struct list_head active_list;
-	struct list_head expiring_list;
-	struct rcu_head rcu;
-};
-
-static inline struct autofs_sb_info *autofs_sbi(struct super_block *sb)
-{
-	return (struct autofs_sb_info *)(sb->s_fs_info);
-}
-
-static inline struct autofs_info *autofs_dentry_ino(struct dentry *dentry)
-{
-	return (struct autofs_info *)(dentry->d_fsdata);
-}
-
-/* autofs_oz_mode(): do we see the man behind the curtain?  (The
- * processes which do manipulations for us in user space sees the raw
- * filesystem without "magic".)
- */
-static inline int autofs_oz_mode(struct autofs_sb_info *sbi)
-{
-	return sbi->catatonic || task_pgrp(current) == sbi->oz_pgrp;
-}
-
-struct inode *autofs_get_inode(struct super_block *, umode_t);
-void autofs_free_ino(struct autofs_info *);
-
-/* Expiration */
-int is_autofs_dentry(struct dentry *);
-int autofs_expire_wait(const struct path *path, int rcu_walk);
-int autofs_expire_run(struct super_block *, struct vfsmount *,
-		      struct autofs_sb_info *,
-		      struct autofs_packet_expire __user *);
-int autofs_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,
-			   struct autofs_sb_info *sbi, int when);
-int autofs_expire_multi(struct super_block *, struct vfsmount *,
-			struct autofs_sb_info *, int __user *);
-struct dentry *autofs_expire_direct(struct super_block *sb,
-				    struct vfsmount *mnt,
-				    struct autofs_sb_info *sbi, int how);
-struct dentry *autofs_expire_indirect(struct super_block *sb,
-				      struct vfsmount *mnt,
-				      struct autofs_sb_info *sbi, int how);
-
-/* Device node initialization */
-
-int autofs_dev_ioctl_init(void);
-void autofs_dev_ioctl_exit(void);
-
-/* Operations structures */
-
-extern const struct inode_operations autofs_symlink_inode_operations;
-extern const struct inode_operations autofs_dir_inode_operations;
-extern const struct file_operations autofs_dir_operations;
-extern const struct file_operations autofs_root_operations;
-extern const struct dentry_operations autofs_dentry_operations;
-
-/* VFS automount flags management functions */
-static inline void __managed_dentry_set_managed(struct dentry *dentry)
-{
-	dentry->d_flags |= (DCACHE_NEED_AUTOMOUNT|DCACHE_MANAGE_TRANSIT);
-}
-
-static inline void managed_dentry_set_managed(struct dentry *dentry)
-{
-	spin_lock(&dentry->d_lock);
-	__managed_dentry_set_managed(dentry);
-	spin_unlock(&dentry->d_lock);
-}
-
-static inline void __managed_dentry_clear_managed(struct dentry *dentry)
-{
-	dentry->d_flags &= ~(DCACHE_NEED_AUTOMOUNT|DCACHE_MANAGE_TRANSIT);
-}
-
-static inline void managed_dentry_clear_managed(struct dentry *dentry)
-{
-	spin_lock(&dentry->d_lock);
-	__managed_dentry_clear_managed(dentry);
-	spin_unlock(&dentry->d_lock);
-}
-
-/* Initializing function */
-
-int autofs_fill_super(struct super_block *, void *, int);
-struct autofs_info *autofs_new_ino(struct autofs_sb_info *);
-void autofs_clean_ino(struct autofs_info *);
-
-static inline int autofs_prepare_pipe(struct file *pipe)
-{
-	if (!(pipe->f_mode & FMODE_CAN_WRITE))
-		return -EINVAL;
-	if (!S_ISFIFO(file_inode(pipe)->i_mode))
-		return -EINVAL;
-	/* We want a packet pipe */
-	pipe->f_flags |= O_DIRECT;
-	return 0;
-}
-
-/* Queue management functions */
-
-int autofs_wait(struct autofs_sb_info *,
-		 const struct path *, enum autofs_notify);
-int autofs_wait_release(struct autofs_sb_info *, autofs_wqt_t, int);
-void autofs_catatonic_mode(struct autofs_sb_info *);
-
-static inline u32 autofs_get_dev(struct autofs_sb_info *sbi)
-{
-	return new_encode_dev(sbi->sb->s_dev);
-}
-
-static inline u64 autofs_get_ino(struct autofs_sb_info *sbi)
-{
-	return d_inode(sbi->sb->s_root)->i_ino;
-}
-
-static inline void __autofs_add_expiring(struct dentry *dentry)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
-	struct autofs_info *ino = autofs_dentry_ino(dentry);
-
-	if (ino) {
-		if (list_empty(&ino->expiring))
-			list_add(&ino->expiring, &sbi->expiring_list);
-	}
-}
-
-static inline void autofs_add_expiring(struct dentry *dentry)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
-	struct autofs_info *ino = autofs_dentry_ino(dentry);
-
-	if (ino) {
-		spin_lock(&sbi->lookup_lock);
-		if (list_empty(&ino->expiring))
-			list_add(&ino->expiring, &sbi->expiring_list);
-		spin_unlock(&sbi->lookup_lock);
-	}
-}
-
-static inline void autofs_del_expiring(struct dentry *dentry)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
-	struct autofs_info *ino = autofs_dentry_ino(dentry);
-
-	if (ino) {
-		spin_lock(&sbi->lookup_lock);
-		if (!list_empty(&ino->expiring))
-			list_del_init(&ino->expiring);
-		spin_unlock(&sbi->lookup_lock);
-	}
-}
-
-void autofs_kill_sb(struct super_block *);
diff --git a/fs/autofs4/dev-ioctl.c b/fs/autofs4/dev-ioctl.c
deleted file mode 100644
index a2281ab2b957..000000000000
--- a/fs/autofs4/dev-ioctl.c
+++ /dev/null
@@ -1,761 +0,0 @@
-/*
- * Copyright 2008 Red Hat, Inc. All rights reserved.
- * Copyright 2008 Ian Kent <raven@themaw.net>
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- */
-
-#include <linux/module.h>
-#include <linux/vmalloc.h>
-#include <linux/miscdevice.h>
-#include <linux/init.h>
-#include <linux/wait.h>
-#include <linux/namei.h>
-#include <linux/fcntl.h>
-#include <linux/file.h>
-#include <linux/fdtable.h>
-#include <linux/sched.h>
-#include <linux/cred.h>
-#include <linux/compat.h>
-#include <linux/syscalls.h>
-#include <linux/magic.h>
-#include <linux/dcache.h>
-#include <linux/uaccess.h>
-#include <linux/slab.h>
-
-#include "autofs_i.h"
-
-/*
- * This module implements an interface for routing autofs ioctl control
- * commands via a miscellaneous device file.
- *
- * The alternate interface is needed because we need to be able open
- * an ioctl file descriptor on an autofs mount that may be covered by
- * another mount. This situation arises when starting automount(8)
- * or other user space daemon which uses direct mounts or offset
- * mounts (used for autofs lazy mount/umount of nested mount trees),
- * which have been left busy at at service shutdown.
- */
-
-typedef int (*ioctl_fn)(struct file *, struct autofs_sb_info *,
-			struct autofs_dev_ioctl *);
-
-static int check_name(const char *name)
-{
-	if (!strchr(name, '/'))
-		return -EINVAL;
-	return 0;
-}
-
-/*
- * Check a string doesn't overrun the chunk of
- * memory we copied from user land.
- */
-static int invalid_str(char *str, size_t size)
-{
-	if (memchr(str, 0, size))
-		return 0;
-	return -EINVAL;
-}
-
-/*
- * Check that the user compiled against correct version of autofs
- * misc device code.
- *
- * As well as checking the version compatibility this always copies
- * the kernel interface version out.
- */
-static int check_dev_ioctl_version(int cmd, struct autofs_dev_ioctl *param)
-{
-	int err = 0;
-
-	if ((param->ver_major != AUTOFS_DEV_IOCTL_VERSION_MAJOR) ||
-	    (param->ver_minor > AUTOFS_DEV_IOCTL_VERSION_MINOR)) {
-		pr_warn("ioctl control interface version mismatch: "
-			"kernel(%u.%u), user(%u.%u), cmd(0x%08x)\n",
-			AUTOFS_DEV_IOCTL_VERSION_MAJOR,
-			AUTOFS_DEV_IOCTL_VERSION_MINOR,
-			param->ver_major, param->ver_minor, cmd);
-		err = -EINVAL;
-	}
-
-	/* Fill in the kernel version. */
-	param->ver_major = AUTOFS_DEV_IOCTL_VERSION_MAJOR;
-	param->ver_minor = AUTOFS_DEV_IOCTL_VERSION_MINOR;
-
-	return err;
-}
-
-/*
- * Copy parameter control struct, including a possible path allocated
- * at the end of the struct.
- */
-static struct autofs_dev_ioctl *
-copy_dev_ioctl(struct autofs_dev_ioctl __user *in)
-{
-	struct autofs_dev_ioctl tmp, *res;
-
-	if (copy_from_user(&tmp, in, AUTOFS_DEV_IOCTL_SIZE))
-		return ERR_PTR(-EFAULT);
-
-	if (tmp.size < AUTOFS_DEV_IOCTL_SIZE)
-		return ERR_PTR(-EINVAL);
-
-	if (tmp.size > AUTOFS_DEV_IOCTL_SIZE + PATH_MAX)
-		return ERR_PTR(-ENAMETOOLONG);
-
-	res = memdup_user(in, tmp.size);
-	if (!IS_ERR(res))
-		res->size = tmp.size;
-
-	return res;
-}
-
-static inline void free_dev_ioctl(struct autofs_dev_ioctl *param)
-{
-	kfree(param);
-}
-
-/*
- * Check sanity of parameter control fields and if a path is present
- * check that it is terminated and contains at least one "/".
- */
-static int validate_dev_ioctl(int cmd, struct autofs_dev_ioctl *param)
-{
-	int err;
-
-	err = check_dev_ioctl_version(cmd, param);
-	if (err) {
-		pr_warn("invalid device control module version "
-			"supplied for cmd(0x%08x)\n", cmd);
-		goto out;
-	}
-
-	if (param->size > AUTOFS_DEV_IOCTL_SIZE) {
-		err = invalid_str(param->path, param->size - AUTOFS_DEV_IOCTL_SIZE);
-		if (err) {
-			pr_warn(
-			  "path string terminator missing for cmd(0x%08x)\n",
-			  cmd);
-			goto out;
-		}
-
-		err = check_name(param->path);
-		if (err) {
-			pr_warn("invalid path supplied for cmd(0x%08x)\n",
-				cmd);
-			goto out;
-		}
-	}
-
-	err = 0;
-out:
-	return err;
-}
-
-/*
- * Get the autofs super block info struct from the file opened on
- * the autofs mount point.
- */
-static struct autofs_sb_info *autofs_dev_ioctl_sbi(struct file *f)
-{
-	struct autofs_sb_info *sbi = NULL;
-	struct inode *inode;
-
-	if (f) {
-		inode = file_inode(f);
-		sbi = autofs_sbi(inode->i_sb);
-	}
-	return sbi;
-}
-
-/* Return autofs dev ioctl version */
-static int autofs_dev_ioctl_version(struct file *fp,
-				    struct autofs_sb_info *sbi,
-				    struct autofs_dev_ioctl *param)
-{
-	/* This should have already been set. */
-	param->ver_major = AUTOFS_DEV_IOCTL_VERSION_MAJOR;
-	param->ver_minor = AUTOFS_DEV_IOCTL_VERSION_MINOR;
-	return 0;
-}
-
-/* Return autofs module protocol version */
-static int autofs_dev_ioctl_protover(struct file *fp,
-				     struct autofs_sb_info *sbi,
-				     struct autofs_dev_ioctl *param)
-{
-	param->protover.version = sbi->version;
-	return 0;
-}
-
-/* Return autofs module protocol sub version */
-static int autofs_dev_ioctl_protosubver(struct file *fp,
-					struct autofs_sb_info *sbi,
-					struct autofs_dev_ioctl *param)
-{
-	param->protosubver.sub_version = sbi->sub_version;
-	return 0;
-}
-
-/* Find the topmost mount satisfying test() */
-static int find_autofs_mount(const char *pathname,
-			     struct path *res,
-			     int test(const struct path *path, void *data),
-			     void *data)
-{
-	struct path path;
-	int err;
-
-	err = kern_path_mountpoint(AT_FDCWD, pathname, &path, 0);
-	if (err)
-		return err;
-	err = -ENOENT;
-	while (path.dentry == path.mnt->mnt_root) {
-		if (path.dentry->d_sb->s_magic == AUTOFS_SUPER_MAGIC) {
-			if (test(&path, data)) {
-				path_get(&path);
-				*res = path;
-				err = 0;
-				break;
-			}
-		}
-		if (!follow_up(&path))
-			break;
-	}
-	path_put(&path);
-	return err;
-}
-
-static int test_by_dev(const struct path *path, void *p)
-{
-	return path->dentry->d_sb->s_dev == *(dev_t *)p;
-}
-
-static int test_by_type(const struct path *path, void *p)
-{
-	struct autofs_info *ino = autofs_dentry_ino(path->dentry);
-
-	return ino && ino->sbi->type & *(unsigned *)p;
-}
-
-/*
- * Open a file descriptor on the autofs mount point corresponding
- * to the given path and device number (aka. new_encode_dev(sb->s_dev)).
- */
-static int autofs_dev_ioctl_open_mountpoint(const char *name, dev_t devid)
-{
-	int err, fd;
-
-	fd = get_unused_fd_flags(O_CLOEXEC);
-	if (likely(fd >= 0)) {
-		struct file *filp;
-		struct path path;
-
-		err = find_autofs_mount(name, &path, test_by_dev, &devid);
-		if (err)
-			goto out;
-
-		filp = dentry_open(&path, O_RDONLY, current_cred());
-		path_put(&path);
-		if (IS_ERR(filp)) {
-			err = PTR_ERR(filp);
-			goto out;
-		}
-
-		fd_install(fd, filp);
-	}
-
-	return fd;
-
-out:
-	put_unused_fd(fd);
-	return err;
-}
-
-/* Open a file descriptor on an autofs mount point */
-static int autofs_dev_ioctl_openmount(struct file *fp,
-				      struct autofs_sb_info *sbi,
-				      struct autofs_dev_ioctl *param)
-{
-	const char *path;
-	dev_t devid;
-	int err, fd;
-
-	/* param->path has already been checked */
-	if (!param->openmount.devid)
-		return -EINVAL;
-
-	param->ioctlfd = -1;
-
-	path = param->path;
-	devid = new_decode_dev(param->openmount.devid);
-
-	err = 0;
-	fd = autofs_dev_ioctl_open_mountpoint(path, devid);
-	if (unlikely(fd < 0)) {
-		err = fd;
-		goto out;
-	}
-
-	param->ioctlfd = fd;
-out:
-	return err;
-}
-
-/* Close file descriptor allocated above (user can also use close(2)). */
-static int autofs_dev_ioctl_closemount(struct file *fp,
-				       struct autofs_sb_info *sbi,
-				       struct autofs_dev_ioctl *param)
-{
-	return ksys_close(param->ioctlfd);
-}
-
-/*
- * Send "ready" status for an existing wait (either a mount or an expire
- * request).
- */
-static int autofs_dev_ioctl_ready(struct file *fp,
-				  struct autofs_sb_info *sbi,
-				  struct autofs_dev_ioctl *param)
-{
-	autofs_wqt_t token;
-
-	token = (autofs_wqt_t) param->ready.token;
-	return autofs_wait_release(sbi, token, 0);
-}
-
-/*
- * Send "fail" status for an existing wait (either a mount or an expire
- * request).
- */
-static int autofs_dev_ioctl_fail(struct file *fp,
-				 struct autofs_sb_info *sbi,
-				 struct autofs_dev_ioctl *param)
-{
-	autofs_wqt_t token;
-	int status;
-
-	token = (autofs_wqt_t) param->fail.token;
-	status = param->fail.status < 0 ? param->fail.status : -ENOENT;
-	return autofs_wait_release(sbi, token, status);
-}
-
-/*
- * Set the pipe fd for kernel communication to the daemon.
- *
- * Normally this is set at mount using an option but if we
- * are reconnecting to a busy mount then we need to use this
- * to tell the autofs mount about the new kernel pipe fd. In
- * order to protect mounts against incorrectly setting the
- * pipefd we also require that the autofs mount be catatonic.
- *
- * This also sets the process group id used to identify the
- * controlling process (eg. the owning automount(8) daemon).
- */
-static int autofs_dev_ioctl_setpipefd(struct file *fp,
-				      struct autofs_sb_info *sbi,
-				      struct autofs_dev_ioctl *param)
-{
-	int pipefd;
-	int err = 0;
-	struct pid *new_pid = NULL;
-
-	if (param->setpipefd.pipefd == -1)
-		return -EINVAL;
-
-	pipefd = param->setpipefd.pipefd;
-
-	mutex_lock(&sbi->wq_mutex);
-	if (!sbi->catatonic) {
-		mutex_unlock(&sbi->wq_mutex);
-		return -EBUSY;
-	} else {
-		struct file *pipe;
-
-		new_pid = get_task_pid(current, PIDTYPE_PGID);
-
-		if (ns_of_pid(new_pid) != ns_of_pid(sbi->oz_pgrp)) {
-			pr_warn("not allowed to change PID namespace\n");
-			err = -EINVAL;
-			goto out;
-		}
-
-		pipe = fget(pipefd);
-		if (!pipe) {
-			err = -EBADF;
-			goto out;
-		}
-		if (autofs_prepare_pipe(pipe) < 0) {
-			err = -EPIPE;
-			fput(pipe);
-			goto out;
-		}
-		swap(sbi->oz_pgrp, new_pid);
-		sbi->pipefd = pipefd;
-		sbi->pipe = pipe;
-		sbi->catatonic = 0;
-	}
-out:
-	put_pid(new_pid);
-	mutex_unlock(&sbi->wq_mutex);
-	return err;
-}
-
-/*
- * Make the autofs mount point catatonic, no longer responsive to
- * mount requests. Also closes the kernel pipe file descriptor.
- */
-static int autofs_dev_ioctl_catatonic(struct file *fp,
-				      struct autofs_sb_info *sbi,
-				      struct autofs_dev_ioctl *param)
-{
-	autofs_catatonic_mode(sbi);
-	return 0;
-}
-
-/* Set the autofs mount timeout */
-static int autofs_dev_ioctl_timeout(struct file *fp,
-				    struct autofs_sb_info *sbi,
-				    struct autofs_dev_ioctl *param)
-{
-	unsigned long timeout;
-
-	timeout = param->timeout.timeout;
-	param->timeout.timeout = sbi->exp_timeout / HZ;
-	sbi->exp_timeout = timeout * HZ;
-	return 0;
-}
-
-/*
- * Return the uid and gid of the last request for the mount
- *
- * When reconstructing an autofs mount tree with active mounts
- * we need to re-connect to mounts that may have used the original
- * process uid and gid (or string variations of them) for mount
- * lookups within the map entry.
- */
-static int autofs_dev_ioctl_requester(struct file *fp,
-				      struct autofs_sb_info *sbi,
-				      struct autofs_dev_ioctl *param)
-{
-	struct autofs_info *ino;
-	struct path path;
-	dev_t devid;
-	int err = -ENOENT;
-
-	if (param->size <= AUTOFS_DEV_IOCTL_SIZE) {
-		err = -EINVAL;
-		goto out;
-	}
-
-	devid = sbi->sb->s_dev;
-
-	param->requester.uid = param->requester.gid = -1;
-
-	err = find_autofs_mount(param->path, &path, test_by_dev, &devid);
-	if (err)
-		goto out;
-
-	ino = autofs_dentry_ino(path.dentry);
-	if (ino) {
-		err = 0;
-		autofs_expire_wait(&path, 0);
-		spin_lock(&sbi->fs_lock);
-		param->requester.uid =
-			from_kuid_munged(current_user_ns(), ino->uid);
-		param->requester.gid =
-			from_kgid_munged(current_user_ns(), ino->gid);
-		spin_unlock(&sbi->fs_lock);
-	}
-	path_put(&path);
-out:
-	return err;
-}
-
-/*
- * Call repeatedly until it returns -EAGAIN, meaning there's nothing
- * more that can be done.
- */
-static int autofs_dev_ioctl_expire(struct file *fp,
-				   struct autofs_sb_info *sbi,
-				   struct autofs_dev_ioctl *param)
-{
-	struct vfsmount *mnt;
-	int how;
-
-	how = param->expire.how;
-	mnt = fp->f_path.mnt;
-
-	return autofs_do_expire_multi(sbi->sb, mnt, sbi, how);
-}
-
-/* Check if autofs mount point is in use */
-static int autofs_dev_ioctl_askumount(struct file *fp,
-				      struct autofs_sb_info *sbi,
-				      struct autofs_dev_ioctl *param)
-{
-	param->askumount.may_umount = 0;
-	if (may_umount(fp->f_path.mnt))
-		param->askumount.may_umount = 1;
-	return 0;
-}
-
-/*
- * Check if the given path is a mountpoint.
- *
- * If we are supplied with the file descriptor of an autofs
- * mount we're looking for a specific mount. In this case
- * the path is considered a mountpoint if it is itself a
- * mountpoint or contains a mount, such as a multi-mount
- * without a root mount. In this case we return 1 if the
- * path is a mount point and the super magic of the covering
- * mount if there is one or 0 if it isn't a mountpoint.
- *
- * If we aren't supplied with a file descriptor then we
- * lookup the path and check if it is the root of a mount.
- * If a type is given we are looking for a particular autofs
- * mount and if we don't find a match we return fail. If the
- * located path is the root of a mount we return 1 along with
- * the super magic of the mount or 0 otherwise.
- *
- * In both cases the the device number (as returned by
- * new_encode_dev()) is also returned.
- */
-static int autofs_dev_ioctl_ismountpoint(struct file *fp,
-					 struct autofs_sb_info *sbi,
-					 struct autofs_dev_ioctl *param)
-{
-	struct path path;
-	const char *name;
-	unsigned int type;
-	unsigned int devid, magic;
-	int err = -ENOENT;
-
-	if (param->size <= AUTOFS_DEV_IOCTL_SIZE) {
-		err = -EINVAL;
-		goto out;
-	}
-
-	name = param->path;
-	type = param->ismountpoint.in.type;
-
-	param->ismountpoint.out.devid = devid = 0;
-	param->ismountpoint.out.magic = magic = 0;
-
-	if (!fp || param->ioctlfd == -1) {
-		if (autofs_type_any(type))
-			err = kern_path_mountpoint(AT_FDCWD,
-						   name, &path, LOOKUP_FOLLOW);
-		else
-			err = find_autofs_mount(name, &path,
-						test_by_type, &type);
-		if (err)
-			goto out;
-		devid = new_encode_dev(path.dentry->d_sb->s_dev);
-		err = 0;
-		if (path.mnt->mnt_root == path.dentry) {
-			err = 1;
-			magic = path.dentry->d_sb->s_magic;
-		}
-	} else {
-		dev_t dev = sbi->sb->s_dev;
-
-		err = find_autofs_mount(name, &path, test_by_dev, &dev);
-		if (err)
-			goto out;
-
-		devid = new_encode_dev(dev);
-
-		err = path_has_submounts(&path);
-
-		if (follow_down_one(&path))
-			magic = path.dentry->d_sb->s_magic;
-	}
-
-	param->ismountpoint.out.devid = devid;
-	param->ismountpoint.out.magic = magic;
-	path_put(&path);
-out:
-	return err;
-}
-
-/*
- * Our range of ioctl numbers isn't 0 based so we need to shift
- * the array index by _IOC_NR(AUTOFS_CTL_IOC_FIRST) for the table
- * lookup.
- */
-#define cmd_idx(cmd)	(cmd - _IOC_NR(AUTOFS_DEV_IOCTL_IOC_FIRST))
-
-static ioctl_fn lookup_dev_ioctl(unsigned int cmd)
-{
-	static ioctl_fn _ioctls[] = {
-		autofs_dev_ioctl_version,
-		autofs_dev_ioctl_protover,
-		autofs_dev_ioctl_protosubver,
-		autofs_dev_ioctl_openmount,
-		autofs_dev_ioctl_closemount,
-		autofs_dev_ioctl_ready,
-		autofs_dev_ioctl_fail,
-		autofs_dev_ioctl_setpipefd,
-		autofs_dev_ioctl_catatonic,
-		autofs_dev_ioctl_timeout,
-		autofs_dev_ioctl_requester,
-		autofs_dev_ioctl_expire,
-		autofs_dev_ioctl_askumount,
-		autofs_dev_ioctl_ismountpoint,
-	};
-	unsigned int idx = cmd_idx(cmd);
-
-	return (idx >= ARRAY_SIZE(_ioctls)) ? NULL : _ioctls[idx];
-}
-
-/* ioctl dispatcher */
-static int _autofs_dev_ioctl(unsigned int command,
-			     struct autofs_dev_ioctl __user *user)
-{
-	struct autofs_dev_ioctl *param;
-	struct file *fp;
-	struct autofs_sb_info *sbi;
-	unsigned int cmd_first, cmd;
-	ioctl_fn fn = NULL;
-	int err = 0;
-
-	cmd_first = _IOC_NR(AUTOFS_DEV_IOCTL_IOC_FIRST);
-	cmd = _IOC_NR(command);
-
-	if (_IOC_TYPE(command) != _IOC_TYPE(AUTOFS_DEV_IOCTL_IOC_FIRST) ||
-	    cmd - cmd_first > AUTOFS_DEV_IOCTL_IOC_COUNT) {
-		return -ENOTTY;
-	}
-
-	/* Only root can use ioctls other than AUTOFS_DEV_IOCTL_VERSION_CMD
-	 * and AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD
-	 */
-	if (cmd != AUTOFS_DEV_IOCTL_VERSION_CMD &&
-	    cmd != AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD &&
-	    !capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	/* Copy the parameters into kernel space. */
-	param = copy_dev_ioctl(user);
-	if (IS_ERR(param))
-		return PTR_ERR(param);
-
-	err = validate_dev_ioctl(command, param);
-	if (err)
-		goto out;
-
-	fn = lookup_dev_ioctl(cmd);
-	if (!fn) {
-		pr_warn("unknown command 0x%08x\n", command);
-		err = -ENOTTY;
-		goto out;
-	}
-
-	fp = NULL;
-	sbi = NULL;
-
-	/*
-	 * For obvious reasons the openmount can't have a file
-	 * descriptor yet. We don't take a reference to the
-	 * file during close to allow for immediate release,
-	 * and the same for retrieving ioctl version.
-	 */
-	if (cmd != AUTOFS_DEV_IOCTL_VERSION_CMD &&
-	    cmd != AUTOFS_DEV_IOCTL_OPENMOUNT_CMD &&
-	    cmd != AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD) {
-		fp = fget(param->ioctlfd);
-		if (!fp) {
-			if (cmd == AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD)
-				goto cont;
-			err = -EBADF;
-			goto out;
-		}
-
-		sbi = autofs_dev_ioctl_sbi(fp);
-		if (!sbi || sbi->magic != AUTOFS_SBI_MAGIC) {
-			err = -EINVAL;
-			fput(fp);
-			goto out;
-		}
-
-		/*
-		 * Admin needs to be able to set the mount catatonic in
-		 * order to be able to perform the re-open.
-		 */
-		if (!autofs_oz_mode(sbi) &&
-		    cmd != AUTOFS_DEV_IOCTL_CATATONIC_CMD) {
-			err = -EACCES;
-			fput(fp);
-			goto out;
-		}
-	}
-cont:
-	err = fn(fp, sbi, param);
-
-	if (fp)
-		fput(fp);
-	if (err >= 0 && copy_to_user(user, param, AUTOFS_DEV_IOCTL_SIZE))
-		err = -EFAULT;
-out:
-	free_dev_ioctl(param);
-	return err;
-}
-
-static long autofs_dev_ioctl(struct file *file, unsigned int command,
-			     unsigned long u)
-{
-	int err;
-
-	err = _autofs_dev_ioctl(command, (struct autofs_dev_ioctl __user *) u);
-	return (long) err;
-}
-
-#ifdef CONFIG_COMPAT
-static long autofs_dev_ioctl_compat(struct file *file, unsigned int command,
-				    unsigned long u)
-{
-	return autofs_dev_ioctl(file, command, (unsigned long) compat_ptr(u));
-}
-#else
-#define autofs_dev_ioctl_compat NULL
-#endif
-
-static const struct file_operations _dev_ioctl_fops = {
-	.unlocked_ioctl	 = autofs_dev_ioctl,
-	.compat_ioctl = autofs_dev_ioctl_compat,
-	.owner	 = THIS_MODULE,
-	.llseek = noop_llseek,
-};
-
-static struct miscdevice _autofs_dev_ioctl_misc = {
-	.minor		= AUTOFS_MINOR,
-	.name		= AUTOFS_DEVICE_NAME,
-	.fops		= &_dev_ioctl_fops,
-	.mode           = 0644,
-};
-
-MODULE_ALIAS_MISCDEV(AUTOFS_MINOR);
-MODULE_ALIAS("devname:autofs");
-
-/* Register/deregister misc character device */
-int __init autofs_dev_ioctl_init(void)
-{
-	int r;
-
-	r = misc_register(&_autofs_dev_ioctl_misc);
-	if (r) {
-		pr_err("misc_register failed for control device\n");
-		return r;
-	}
-
-	return 0;
-}
-
-void autofs_dev_ioctl_exit(void)
-{
-	misc_deregister(&_autofs_dev_ioctl_misc);
-}
diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
deleted file mode 100644
index 36f16b67a3bf..000000000000
--- a/fs/autofs4/expire.c
+++ /dev/null
@@ -1,632 +0,0 @@
-/*
- * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
- * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org>
- * Copyright 2001-2006 Ian Kent <raven@themaw.net>
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- */
-
-#include "autofs_i.h"
-
-static unsigned long now;
-
-/* Check if a dentry can be expired */
-static inline int autofs_can_expire(struct dentry *dentry,
-				    unsigned long timeout, int do_now)
-{
-	struct autofs_info *ino = autofs_dentry_ino(dentry);
-
-	/* dentry in the process of being deleted */
-	if (ino == NULL)
-		return 0;
-
-	if (!do_now) {
-		/* Too young to die */
-		if (!timeout || time_after(ino->last_used + timeout, now))
-			return 0;
-	}
-	return 1;
-}
-
-/* Check a mount point for busyness */
-static int autofs_mount_busy(struct vfsmount *mnt, struct dentry *dentry)
-{
-	struct dentry *top = dentry;
-	struct path path = {.mnt = mnt, .dentry = dentry};
-	int status = 1;
-
-	pr_debug("dentry %p %pd\n", dentry, dentry);
-
-	path_get(&path);
-
-	if (!follow_down_one(&path))
-		goto done;
-
-	if (is_autofs_dentry(path.dentry)) {
-		struct autofs_sb_info *sbi = autofs_sbi(path.dentry->d_sb);
-
-		/* This is an autofs submount, we can't expire it */
-		if (autofs_type_indirect(sbi->type))
-			goto done;
-	}
-
-	/* Update the expiry counter if fs is busy */
-	if (!may_umount_tree(path.mnt)) {
-		struct autofs_info *ino;
-
-		ino = autofs_dentry_ino(top);
-		ino->last_used = jiffies;
-		goto done;
-	}
-
-	status = 0;
-done:
-	pr_debug("returning = %d\n", status);
-	path_put(&path);
-	return status;
-}
-
-/*
- * Calculate and dget next entry in the subdirs list under root.
- */
-static struct dentry *get_next_positive_subdir(struct dentry *prev,
-					       struct dentry *root)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(root->d_sb);
-	struct list_head *next;
-	struct dentry *q;
-
-	spin_lock(&sbi->lookup_lock);
-	spin_lock(&root->d_lock);
-
-	if (prev)
-		next = prev->d_child.next;
-	else {
-		prev = dget_dlock(root);
-		next = prev->d_subdirs.next;
-	}
-
-cont:
-	if (next == &root->d_subdirs) {
-		spin_unlock(&root->d_lock);
-		spin_unlock(&sbi->lookup_lock);
-		dput(prev);
-		return NULL;
-	}
-
-	q = list_entry(next, struct dentry, d_child);
-
-	spin_lock_nested(&q->d_lock, DENTRY_D_LOCK_NESTED);
-	/* Already gone or negative dentry (under construction) - try next */
-	if (!d_count(q) || !simple_positive(q)) {
-		spin_unlock(&q->d_lock);
-		next = q->d_child.next;
-		goto cont;
-	}
-	dget_dlock(q);
-	spin_unlock(&q->d_lock);
-	spin_unlock(&root->d_lock);
-	spin_unlock(&sbi->lookup_lock);
-
-	dput(prev);
-
-	return q;
-}
-
-/*
- * Calculate and dget next entry in top down tree traversal.
- */
-static struct dentry *get_next_positive_dentry(struct dentry *prev,
-					       struct dentry *root)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(root->d_sb);
-	struct list_head *next;
-	struct dentry *p, *ret;
-
-	if (prev == NULL)
-		return dget(root);
-
-	spin_lock(&sbi->lookup_lock);
-relock:
-	p = prev;
-	spin_lock(&p->d_lock);
-again:
-	next = p->d_subdirs.next;
-	if (next == &p->d_subdirs) {
-		while (1) {
-			struct dentry *parent;
-
-			if (p == root) {
-				spin_unlock(&p->d_lock);
-				spin_unlock(&sbi->lookup_lock);
-				dput(prev);
-				return NULL;
-			}
-
-			parent = p->d_parent;
-			if (!spin_trylock(&parent->d_lock)) {
-				spin_unlock(&p->d_lock);
-				cpu_relax();
-				goto relock;
-			}
-			spin_unlock(&p->d_lock);
-			next = p->d_child.next;
-			p = parent;
-			if (next != &parent->d_subdirs)
-				break;
-		}
-	}
-	ret = list_entry(next, struct dentry, d_child);
-
-	spin_lock_nested(&ret->d_lock, DENTRY_D_LOCK_NESTED);
-	/* Negative dentry - try next */
-	if (!simple_positive(ret)) {
-		spin_unlock(&p->d_lock);
-		lock_set_subclass(&ret->d_lock.dep_map, 0, _RET_IP_);
-		p = ret;
-		goto again;
-	}
-	dget_dlock(ret);
-	spin_unlock(&ret->d_lock);
-	spin_unlock(&p->d_lock);
-	spin_unlock(&sbi->lookup_lock);
-
-	dput(prev);
-
-	return ret;
-}
-
-/*
- * Check a direct mount point for busyness.
- * Direct mounts have similar expiry semantics to tree mounts.
- * The tree is not busy iff no mountpoints are busy and there are no
- * autofs submounts.
- */
-static int autofs_direct_busy(struct vfsmount *mnt,
-			      struct dentry *top,
-			      unsigned long timeout,
-			      int do_now)
-{
-	pr_debug("top %p %pd\n", top, top);
-
-	/* If it's busy update the expiry counters */
-	if (!may_umount_tree(mnt)) {
-		struct autofs_info *ino;
-
-		ino = autofs_dentry_ino(top);
-		if (ino)
-			ino->last_used = jiffies;
-		return 1;
-	}
-
-	/* Timeout of a direct mount is determined by its top dentry */
-	if (!autofs_can_expire(top, timeout, do_now))
-		return 1;
-
-	return 0;
-}
-
-/*
- * Check a directory tree of mount points for busyness
- * The tree is not busy iff no mountpoints are busy
- */
-static int autofs_tree_busy(struct vfsmount *mnt,
-			    struct dentry *top,
-			    unsigned long timeout,
-			    int do_now)
-{
-	struct autofs_info *top_ino = autofs_dentry_ino(top);
-	struct dentry *p;
-
-	pr_debug("top %p %pd\n", top, top);
-
-	/* Negative dentry - give up */
-	if (!simple_positive(top))
-		return 1;
-
-	p = NULL;
-	while ((p = get_next_positive_dentry(p, top))) {
-		pr_debug("dentry %p %pd\n", p, p);
-
-		/*
-		 * Is someone visiting anywhere in the subtree ?
-		 * If there's no mount we need to check the usage
-		 * count for the autofs dentry.
-		 * If the fs is busy update the expiry counter.
-		 */
-		if (d_mountpoint(p)) {
-			if (autofs_mount_busy(mnt, p)) {
-				top_ino->last_used = jiffies;
-				dput(p);
-				return 1;
-			}
-		} else {
-			struct autofs_info *ino = autofs_dentry_ino(p);
-			unsigned int ino_count = atomic_read(&ino->count);
-
-			/* allow for dget above and top is already dgot */
-			if (p == top)
-				ino_count += 2;
-			else
-				ino_count++;
-
-			if (d_count(p) > ino_count) {
-				top_ino->last_used = jiffies;
-				dput(p);
-				return 1;
-			}
-		}
-	}
-
-	/* Timeout of a tree mount is ultimately determined by its top dentry */
-	if (!autofs_can_expire(top, timeout, do_now))
-		return 1;
-
-	return 0;
-}
-
-static struct dentry *autofs_check_leaves(struct vfsmount *mnt,
-					  struct dentry *parent,
-					  unsigned long timeout,
-					  int do_now)
-{
-	struct dentry *p;
-
-	pr_debug("parent %p %pd\n", parent, parent);
-
-	p = NULL;
-	while ((p = get_next_positive_dentry(p, parent))) {
-		pr_debug("dentry %p %pd\n", p, p);
-
-		if (d_mountpoint(p)) {
-			/* Can we umount this guy */
-			if (autofs_mount_busy(mnt, p))
-				continue;
-
-			/* Can we expire this guy */
-			if (autofs_can_expire(p, timeout, do_now))
-				return p;
-		}
-	}
-	return NULL;
-}
-
-/* Check if we can expire a direct mount (possibly a tree) */
-struct dentry *autofs_expire_direct(struct super_block *sb,
-				    struct vfsmount *mnt,
-				    struct autofs_sb_info *sbi,
-				    int how)
-{
-	unsigned long timeout;
-	struct dentry *root = dget(sb->s_root);
-	int do_now = how & AUTOFS_EXP_IMMEDIATE;
-	struct autofs_info *ino;
-
-	if (!root)
-		return NULL;
-
-	now = jiffies;
-	timeout = sbi->exp_timeout;
-
-	if (!autofs_direct_busy(mnt, root, timeout, do_now)) {
-		spin_lock(&sbi->fs_lock);
-		ino = autofs_dentry_ino(root);
-		/* No point expiring a pending mount */
-		if (ino->flags & AUTOFS_INF_PENDING) {
-			spin_unlock(&sbi->fs_lock);
-			goto out;
-		}
-		ino->flags |= AUTOFS_INF_WANT_EXPIRE;
-		spin_unlock(&sbi->fs_lock);
-		synchronize_rcu();
-		if (!autofs_direct_busy(mnt, root, timeout, do_now)) {
-			spin_lock(&sbi->fs_lock);
-			ino->flags |= AUTOFS_INF_EXPIRING;
-			init_completion(&ino->expire_complete);
-			spin_unlock(&sbi->fs_lock);
-			return root;
-		}
-		spin_lock(&sbi->fs_lock);
-		ino->flags &= ~AUTOFS_INF_WANT_EXPIRE;
-		spin_unlock(&sbi->fs_lock);
-	}
-out:
-	dput(root);
-
-	return NULL;
-}
-
-/* Check if 'dentry' should expire, or return a nearby
- * dentry that is suitable.
- * If returned dentry is different from arg dentry,
- * then a dget() reference was taken, else not.
- */
-static struct dentry *should_expire(struct dentry *dentry,
-				    struct vfsmount *mnt,
-				    unsigned long timeout,
-				    int how)
-{
-	int do_now = how & AUTOFS_EXP_IMMEDIATE;
-	int exp_leaves = how & AUTOFS_EXP_LEAVES;
-	struct autofs_info *ino = autofs_dentry_ino(dentry);
-	unsigned int ino_count;
-
-	/* No point expiring a pending mount */
-	if (ino->flags & AUTOFS_INF_PENDING)
-		return NULL;
-
-	/*
-	 * Case 1: (i) indirect mount or top level pseudo direct mount
-	 *	   (autofs-4.1).
-	 *	   (ii) indirect mount with offset mount, check the "/"
-	 *	   offset (autofs-5.0+).
-	 */
-	if (d_mountpoint(dentry)) {
-		pr_debug("checking mountpoint %p %pd\n", dentry, dentry);
-
-		/* Can we umount this guy */
-		if (autofs_mount_busy(mnt, dentry))
-			return NULL;
-
-		/* Can we expire this guy */
-		if (autofs_can_expire(dentry, timeout, do_now))
-			return dentry;
-		return NULL;
-	}
-
-	if (d_really_is_positive(dentry) && d_is_symlink(dentry)) {
-		pr_debug("checking symlink %p %pd\n", dentry, dentry);
-		/*
-		 * A symlink can't be "busy" in the usual sense so
-		 * just check last used for expire timeout.
-		 */
-		if (autofs_can_expire(dentry, timeout, do_now))
-			return dentry;
-		return NULL;
-	}
-
-	if (simple_empty(dentry))
-		return NULL;
-
-	/* Case 2: tree mount, expire iff entire tree is not busy */
-	if (!exp_leaves) {
-		/* Path walk currently on this dentry? */
-		ino_count = atomic_read(&ino->count) + 1;
-		if (d_count(dentry) > ino_count)
-			return NULL;
-
-		if (!autofs_tree_busy(mnt, dentry, timeout, do_now))
-			return dentry;
-	/*
-	 * Case 3: pseudo direct mount, expire individual leaves
-	 *	   (autofs-4.1).
-	 */
-	} else {
-		/* Path walk currently on this dentry? */
-		struct dentry *expired;
-
-		ino_count = atomic_read(&ino->count) + 1;
-		if (d_count(dentry) > ino_count)
-			return NULL;
-
-		expired = autofs_check_leaves(mnt, dentry, timeout, do_now);
-		if (expired) {
-			if (expired == dentry)
-				dput(dentry);
-			return expired;
-		}
-	}
-	return NULL;
-}
-
-/*
- * Find an eligible tree to time-out
- * A tree is eligible if :-
- *  - it is unused by any user process
- *  - it has been unused for exp_timeout time
- */
-struct dentry *autofs_expire_indirect(struct super_block *sb,
-				      struct vfsmount *mnt,
-				      struct autofs_sb_info *sbi,
-				      int how)
-{
-	unsigned long timeout;
-	struct dentry *root = sb->s_root;
-	struct dentry *dentry;
-	struct dentry *expired;
-	struct dentry *found;
-	struct autofs_info *ino;
-
-	if (!root)
-		return NULL;
-
-	now = jiffies;
-	timeout = sbi->exp_timeout;
-
-	dentry = NULL;
-	while ((dentry = get_next_positive_subdir(dentry, root))) {
-		int flags = how;
-
-		spin_lock(&sbi->fs_lock);
-		ino = autofs_dentry_ino(dentry);
-		if (ino->flags & AUTOFS_INF_WANT_EXPIRE) {
-			spin_unlock(&sbi->fs_lock);
-			continue;
-		}
-		spin_unlock(&sbi->fs_lock);
-
-		expired = should_expire(dentry, mnt, timeout, flags);
-		if (!expired)
-			continue;
-
-		spin_lock(&sbi->fs_lock);
-		ino = autofs_dentry_ino(expired);
-		ino->flags |= AUTOFS_INF_WANT_EXPIRE;
-		spin_unlock(&sbi->fs_lock);
-		synchronize_rcu();
-
-		/* Make sure a reference is not taken on found if
-		 * things have changed.
-		 */
-		flags &= ~AUTOFS_EXP_LEAVES;
-		found = should_expire(expired, mnt, timeout, how);
-		if (!found || found != expired)
-			/* Something has changed, continue */
-			goto next;
-
-		if (expired != dentry)
-			dput(dentry);
-
-		spin_lock(&sbi->fs_lock);
-		goto found;
-next:
-		spin_lock(&sbi->fs_lock);
-		ino->flags &= ~AUTOFS_INF_WANT_EXPIRE;
-		spin_unlock(&sbi->fs_lock);
-		if (expired != dentry)
-			dput(expired);
-	}
-	return NULL;
-
-found:
-	pr_debug("returning %p %pd\n", expired, expired);
-	ino->flags |= AUTOFS_INF_EXPIRING;
-	init_completion(&ino->expire_complete);
-	spin_unlock(&sbi->fs_lock);
-	return expired;
-}
-
-int autofs_expire_wait(const struct path *path, int rcu_walk)
-{
-	struct dentry *dentry = path->dentry;
-	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
-	struct autofs_info *ino = autofs_dentry_ino(dentry);
-	int status;
-	int state;
-
-	/* Block on any pending expire */
-	if (!(ino->flags & AUTOFS_INF_WANT_EXPIRE))
-		return 0;
-	if (rcu_walk)
-		return -ECHILD;
-
-retry:
-	spin_lock(&sbi->fs_lock);
-	state = ino->flags & (AUTOFS_INF_WANT_EXPIRE | AUTOFS_INF_EXPIRING);
-	if (state == AUTOFS_INF_WANT_EXPIRE) {
-		spin_unlock(&sbi->fs_lock);
-		/*
-		 * Possibly being selected for expire, wait until
-		 * it's selected or not.
-		 */
-		schedule_timeout_uninterruptible(HZ/10);
-		goto retry;
-	}
-	if (state & AUTOFS_INF_EXPIRING) {
-		spin_unlock(&sbi->fs_lock);
-
-		pr_debug("waiting for expire %p name=%pd\n", dentry, dentry);
-
-		status = autofs_wait(sbi, path, NFY_NONE);
-		wait_for_completion(&ino->expire_complete);
-
-		pr_debug("expire done status=%d\n", status);
-
-		if (d_unhashed(dentry))
-			return -EAGAIN;
-
-		return status;
-	}
-	spin_unlock(&sbi->fs_lock);
-
-	return 0;
-}
-
-/* Perform an expiry operation */
-int autofs_expire_run(struct super_block *sb,
-		      struct vfsmount *mnt,
-		      struct autofs_sb_info *sbi,
-		      struct autofs_packet_expire __user *pkt_p)
-{
-	struct autofs_packet_expire pkt;
-	struct autofs_info *ino;
-	struct dentry *dentry;
-	int ret = 0;
-
-	memset(&pkt, 0, sizeof(pkt));
-
-	pkt.hdr.proto_version = sbi->version;
-	pkt.hdr.type = autofs_ptype_expire;
-
-	dentry = autofs_expire_indirect(sb, mnt, sbi, 0);
-	if (!dentry)
-		return -EAGAIN;
-
-	pkt.len = dentry->d_name.len;
-	memcpy(pkt.name, dentry->d_name.name, pkt.len);
-	pkt.name[pkt.len] = '\0';
-	dput(dentry);
-
-	if (copy_to_user(pkt_p, &pkt, sizeof(struct autofs_packet_expire)))
-		ret = -EFAULT;
-
-	spin_lock(&sbi->fs_lock);
-	ino = autofs_dentry_ino(dentry);
-	/* avoid rapid-fire expire attempts if expiry fails */
-	ino->last_used = now;
-	ino->flags &= ~(AUTOFS_INF_EXPIRING|AUTOFS_INF_WANT_EXPIRE);
-	complete_all(&ino->expire_complete);
-	spin_unlock(&sbi->fs_lock);
-
-	return ret;
-}
-
-int autofs_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,
-			   struct autofs_sb_info *sbi, int when)
-{
-	struct dentry *dentry;
-	int ret = -EAGAIN;
-
-	if (autofs_type_trigger(sbi->type))
-		dentry = autofs_expire_direct(sb, mnt, sbi, when);
-	else
-		dentry = autofs_expire_indirect(sb, mnt, sbi, when);
-
-	if (dentry) {
-		struct autofs_info *ino = autofs_dentry_ino(dentry);
-		const struct path path = { .mnt = mnt, .dentry = dentry };
-
-		/* This is synchronous because it makes the daemon a
-		 * little easier
-		 */
-		ret = autofs_wait(sbi, &path, NFY_EXPIRE);
-
-		spin_lock(&sbi->fs_lock);
-		/* avoid rapid-fire expire attempts if expiry fails */
-		ino->last_used = now;
-		ino->flags &= ~(AUTOFS_INF_EXPIRING|AUTOFS_INF_WANT_EXPIRE);
-		complete_all(&ino->expire_complete);
-		spin_unlock(&sbi->fs_lock);
-		dput(dentry);
-	}
-
-	return ret;
-}
-
-/*
- * Call repeatedly until it returns -EAGAIN, meaning there's nothing
- * more to be done.
- */
-int autofs_expire_multi(struct super_block *sb, struct vfsmount *mnt,
-			struct autofs_sb_info *sbi, int __user *arg)
-{
-	int do_now = 0;
-
-	if (arg && get_user(do_now, arg))
-		return -EFAULT;
-
-	return autofs_do_expire_multi(sb, mnt, sbi, do_now);
-}
-
diff --git a/fs/autofs4/init.c b/fs/autofs4/init.c
deleted file mode 100644
index 16fb61315843..000000000000
--- a/fs/autofs4/init.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include "autofs_i.h"
-
-static struct dentry *autofs_mount(struct file_system_type *fs_type,
-	int flags, const char *dev_name, void *data)
-{
-	return mount_nodev(fs_type, flags, data, autofs_fill_super);
-}
-
-static struct file_system_type autofs_fs_type = {
-	.owner		= THIS_MODULE,
-	.name		= "autofs",
-	.mount		= autofs_mount,
-	.kill_sb	= autofs_kill_sb,
-};
-MODULE_ALIAS_FS("autofs");
-
-static int __init init_autofs_fs(void)
-{
-	int err;
-
-	autofs_dev_ioctl_init();
-
-	err = register_filesystem(&autofs_fs_type);
-	if (err)
-		autofs_dev_ioctl_exit();
-
-	return err;
-}
-
-static void __exit exit_autofs_fs(void)
-{
-	autofs_dev_ioctl_exit();
-	unregister_filesystem(&autofs_fs_type);
-}
-
-module_init(init_autofs_fs)
-module_exit(exit_autofs_fs)
-MODULE_LICENSE("GPL");
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
deleted file mode 100644
index 6262819ede45..000000000000
--- a/fs/autofs4/inode.c
+++ /dev/null
@@ -1,375 +0,0 @@
-/*
- * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
- * Copyright 2005-2006 Ian Kent <raven@themaw.net>
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/file.h>
-#include <linux/seq_file.h>
-#include <linux/pagemap.h>
-#include <linux/parser.h>
-#include <linux/bitops.h>
-#include <linux/magic.h>
-#include "autofs_i.h"
-#include <linux/module.h>
-
-struct autofs_info *autofs_new_ino(struct autofs_sb_info *sbi)
-{
-	struct autofs_info *ino;
-
-	ino = kzalloc(sizeof(*ino), GFP_KERNEL);
-	if (ino) {
-		INIT_LIST_HEAD(&ino->active);
-		INIT_LIST_HEAD(&ino->expiring);
-		ino->last_used = jiffies;
-		ino->sbi = sbi;
-	}
-	return ino;
-}
-
-void autofs_clean_ino(struct autofs_info *ino)
-{
-	ino->uid = GLOBAL_ROOT_UID;
-	ino->gid = GLOBAL_ROOT_GID;
-	ino->last_used = jiffies;
-}
-
-void autofs_free_ino(struct autofs_info *ino)
-{
-	kfree(ino);
-}
-
-void autofs_kill_sb(struct super_block *sb)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(sb);
-
-	/*
-	 * In the event of a failure in get_sb_nodev the superblock
-	 * info is not present so nothing else has been setup, so
-	 * just call kill_anon_super when we are called from
-	 * deactivate_super.
-	 */
-	if (sbi) {
-		/* Free wait queues, close pipe */
-		autofs_catatonic_mode(sbi);
-		put_pid(sbi->oz_pgrp);
-	}
-
-	pr_debug("shutting down\n");
-	kill_litter_super(sb);
-	if (sbi)
-		kfree_rcu(sbi, rcu);
-}
-
-static int autofs_show_options(struct seq_file *m, struct dentry *root)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(root->d_sb);
-	struct inode *root_inode = d_inode(root->d_sb->s_root);
-
-	if (!sbi)
-		return 0;
-
-	seq_printf(m, ",fd=%d", sbi->pipefd);
-	if (!uid_eq(root_inode->i_uid, GLOBAL_ROOT_UID))
-		seq_printf(m, ",uid=%u",
-			from_kuid_munged(&init_user_ns, root_inode->i_uid));
-	if (!gid_eq(root_inode->i_gid, GLOBAL_ROOT_GID))
-		seq_printf(m, ",gid=%u",
-			from_kgid_munged(&init_user_ns, root_inode->i_gid));
-	seq_printf(m, ",pgrp=%d", pid_vnr(sbi->oz_pgrp));
-	seq_printf(m, ",timeout=%lu", sbi->exp_timeout/HZ);
-	seq_printf(m, ",minproto=%d", sbi->min_proto);
-	seq_printf(m, ",maxproto=%d", sbi->max_proto);
-
-	if (autofs_type_offset(sbi->type))
-		seq_printf(m, ",offset");
-	else if (autofs_type_direct(sbi->type))
-		seq_printf(m, ",direct");
-	else
-		seq_printf(m, ",indirect");
-#ifdef CONFIG_CHECKPOINT_RESTORE
-	if (sbi->pipe)
-		seq_printf(m, ",pipe_ino=%ld", file_inode(sbi->pipe)->i_ino);
-	else
-		seq_printf(m, ",pipe_ino=-1");
-#endif
-	return 0;
-}
-
-static void autofs_evict_inode(struct inode *inode)
-{
-	clear_inode(inode);
-	kfree(inode->i_private);
-}
-
-static const struct super_operations autofs_sops = {
-	.statfs		= simple_statfs,
-	.show_options	= autofs_show_options,
-	.evict_inode	= autofs_evict_inode,
-};
-
-enum {Opt_err, Opt_fd, Opt_uid, Opt_gid, Opt_pgrp, Opt_minproto, Opt_maxproto,
-	Opt_indirect, Opt_direct, Opt_offset};
-
-static const match_table_t tokens = {
-	{Opt_fd, "fd=%u"},
-	{Opt_uid, "uid=%u"},
-	{Opt_gid, "gid=%u"},
-	{Opt_pgrp, "pgrp=%u"},
-	{Opt_minproto, "minproto=%u"},
-	{Opt_maxproto, "maxproto=%u"},
-	{Opt_indirect, "indirect"},
-	{Opt_direct, "direct"},
-	{Opt_offset, "offset"},
-	{Opt_err, NULL}
-};
-
-static int parse_options(char *options, int *pipefd, kuid_t *uid, kgid_t *gid,
-			 int *pgrp, bool *pgrp_set, unsigned int *type,
-			 int *minproto, int *maxproto)
-{
-	char *p;
-	substring_t args[MAX_OPT_ARGS];
-	int option;
-
-	*uid = current_uid();
-	*gid = current_gid();
-
-	*minproto = AUTOFS_MIN_PROTO_VERSION;
-	*maxproto = AUTOFS_MAX_PROTO_VERSION;
-
-	*pipefd = -1;
-
-	if (!options)
-		return 1;
-
-	while ((p = strsep(&options, ",")) != NULL) {
-		int token;
-
-		if (!*p)
-			continue;
-
-		token = match_token(p, tokens, args);
-		switch (token) {
-		case Opt_fd:
-			if (match_int(args, pipefd))
-				return 1;
-			break;
-		case Opt_uid:
-			if (match_int(args, &option))
-				return 1;
-			*uid = make_kuid(current_user_ns(), option);
-			if (!uid_valid(*uid))
-				return 1;
-			break;
-		case Opt_gid:
-			if (match_int(args, &option))
-				return 1;
-			*gid = make_kgid(current_user_ns(), option);
-			if (!gid_valid(*gid))
-				return 1;
-			break;
-		case Opt_pgrp:
-			if (match_int(args, &option))
-				return 1;
-			*pgrp = option;
-			*pgrp_set = true;
-			break;
-		case Opt_minproto:
-			if (match_int(args, &option))
-				return 1;
-			*minproto = option;
-			break;
-		case Opt_maxproto:
-			if (match_int(args, &option))
-				return 1;
-			*maxproto = option;
-			break;
-		case Opt_indirect:
-			set_autofs_type_indirect(type);
-			break;
-		case Opt_direct:
-			set_autofs_type_direct(type);
-			break;
-		case Opt_offset:
-			set_autofs_type_offset(type);
-			break;
-		default:
-			return 1;
-		}
-	}
-	return (*pipefd < 0);
-}
-
-int autofs_fill_super(struct super_block *s, void *data, int silent)
-{
-	struct inode *root_inode;
-	struct dentry *root;
-	struct file *pipe;
-	int pipefd;
-	struct autofs_sb_info *sbi;
-	struct autofs_info *ino;
-	int pgrp = 0;
-	bool pgrp_set = false;
-	int ret = -EINVAL;
-
-	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
-	if (!sbi)
-		return -ENOMEM;
-	pr_debug("starting up, sbi = %p\n", sbi);
-
-	s->s_fs_info = sbi;
-	sbi->magic = AUTOFS_SBI_MAGIC;
-	sbi->pipefd = -1;
-	sbi->pipe = NULL;
-	sbi->catatonic = 1;
-	sbi->exp_timeout = 0;
-	sbi->oz_pgrp = NULL;
-	sbi->sb = s;
-	sbi->version = 0;
-	sbi->sub_version = 0;
-	set_autofs_type_indirect(&sbi->type);
-	sbi->min_proto = 0;
-	sbi->max_proto = 0;
-	mutex_init(&sbi->wq_mutex);
-	mutex_init(&sbi->pipe_mutex);
-	spin_lock_init(&sbi->fs_lock);
-	sbi->queues = NULL;
-	spin_lock_init(&sbi->lookup_lock);
-	INIT_LIST_HEAD(&sbi->active_list);
-	INIT_LIST_HEAD(&sbi->expiring_list);
-	s->s_blocksize = 1024;
-	s->s_blocksize_bits = 10;
-	s->s_magic = AUTOFS_SUPER_MAGIC;
-	s->s_op = &autofs_sops;
-	s->s_d_op = &autofs_dentry_operations;
-	s->s_time_gran = 1;
-
-	/*
-	 * Get the root inode and dentry, but defer checking for errors.
-	 */
-	ino = autofs_new_ino(sbi);
-	if (!ino) {
-		ret = -ENOMEM;
-		goto fail_free;
-	}
-	root_inode = autofs_get_inode(s, S_IFDIR | 0755);
-	root = d_make_root(root_inode);
-	if (!root)
-		goto fail_ino;
-	pipe = NULL;
-
-	root->d_fsdata = ino;
-
-	/* Can this call block? */
-	if (parse_options(data, &pipefd, &root_inode->i_uid, &root_inode->i_gid,
-			  &pgrp, &pgrp_set, &sbi->type, &sbi->min_proto,
-			  &sbi->max_proto)) {
-		pr_err("called with bogus options\n");
-		goto fail_dput;
-	}
-
-	/* Test versions first */
-	if (sbi->max_proto < AUTOFS_MIN_PROTO_VERSION ||
-	    sbi->min_proto > AUTOFS_MAX_PROTO_VERSION) {
-		pr_err("kernel does not match daemon version "
-		       "daemon (%d, %d) kernel (%d, %d)\n",
-		       sbi->min_proto, sbi->max_proto,
-		       AUTOFS_MIN_PROTO_VERSION, AUTOFS_MAX_PROTO_VERSION);
-		goto fail_dput;
-	}
-
-	/* Establish highest kernel protocol version */
-	if (sbi->max_proto > AUTOFS_MAX_PROTO_VERSION)
-		sbi->version = AUTOFS_MAX_PROTO_VERSION;
-	else
-		sbi->version = sbi->max_proto;
-	sbi->sub_version = AUTOFS_PROTO_SUBVERSION;
-
-	if (pgrp_set) {
-		sbi->oz_pgrp = find_get_pid(pgrp);
-		if (!sbi->oz_pgrp) {
-			pr_err("could not find process group %d\n",
-				pgrp);
-			goto fail_dput;
-		}
-	} else {
-		sbi->oz_pgrp = get_task_pid(current, PIDTYPE_PGID);
-	}
-
-	if (autofs_type_trigger(sbi->type))
-		__managed_dentry_set_managed(root);
-
-	root_inode->i_fop = &autofs_root_operations;
-	root_inode->i_op = &autofs_dir_inode_operations;
-
-	pr_debug("pipe fd = %d, pgrp = %u\n", pipefd, pid_nr(sbi->oz_pgrp));
-	pipe = fget(pipefd);
-
-	if (!pipe) {
-		pr_err("could not open pipe file descriptor\n");
-		goto fail_put_pid;
-	}
-	ret = autofs_prepare_pipe(pipe);
-	if (ret < 0)
-		goto fail_fput;
-	sbi->pipe = pipe;
-	sbi->pipefd = pipefd;
-	sbi->catatonic = 0;
-
-	/*
-	 * Success! Install the root dentry now to indicate completion.
-	 */
-	s->s_root = root;
-	return 0;
-
-	/*
-	 * Failure ... clean up.
-	 */
-fail_fput:
-	pr_err("pipe file descriptor does not contain proper ops\n");
-	fput(pipe);
-fail_put_pid:
-	put_pid(sbi->oz_pgrp);
-fail_dput:
-	dput(root);
-	goto fail_free;
-fail_ino:
-	autofs_free_ino(ino);
-fail_free:
-	kfree(sbi);
-	s->s_fs_info = NULL;
-	return ret;
-}
-
-struct inode *autofs_get_inode(struct super_block *sb, umode_t mode)
-{
-	struct inode *inode = new_inode(sb);
-
-	if (inode == NULL)
-		return NULL;
-
-	inode->i_mode = mode;
-	if (sb->s_root) {
-		inode->i_uid = d_inode(sb->s_root)->i_uid;
-		inode->i_gid = d_inode(sb->s_root)->i_gid;
-	}
-	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
-	inode->i_ino = get_next_ino();
-
-	if (S_ISDIR(mode)) {
-		set_nlink(inode, 2);
-		inode->i_op = &autofs_dir_inode_operations;
-		inode->i_fop = &autofs_dir_operations;
-	} else if (S_ISLNK(mode)) {
-		inode->i_op = &autofs_symlink_inode_operations;
-	} else
-		WARN_ON(1);
-
-	return inode;
-}
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
deleted file mode 100644
index a4b36e44f73c..000000000000
--- a/fs/autofs4/root.c
+++ /dev/null
@@ -1,942 +0,0 @@
-/*
- * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
- * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org>
- * Copyright 2001-2006 Ian Kent <raven@themaw.net>
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- */
-
-#include <linux/capability.h>
-#include <linux/errno.h>
-#include <linux/stat.h>
-#include <linux/slab.h>
-#include <linux/param.h>
-#include <linux/time.h>
-#include <linux/compat.h>
-#include <linux/mutex.h>
-
-#include "autofs_i.h"
-
-static int autofs_dir_symlink(struct inode *, struct dentry *, const char *);
-static int autofs_dir_unlink(struct inode *, struct dentry *);
-static int autofs_dir_rmdir(struct inode *, struct dentry *);
-static int autofs_dir_mkdir(struct inode *, struct dentry *, umode_t);
-static long autofs_root_ioctl(struct file *, unsigned int, unsigned long);
-#ifdef CONFIG_COMPAT
-static long autofs_root_compat_ioctl(struct file *,
-				     unsigned int, unsigned long);
-#endif
-static int autofs_dir_open(struct inode *inode, struct file *file);
-static struct dentry *autofs_lookup(struct inode *,
-				    struct dentry *, unsigned int);
-static struct vfsmount *autofs_d_automount(struct path *);
-static int autofs_d_manage(const struct path *, bool);
-static void autofs_dentry_release(struct dentry *);
-
-const struct file_operations autofs_root_operations = {
-	.open		= dcache_dir_open,
-	.release	= dcache_dir_close,
-	.read		= generic_read_dir,
-	.iterate_shared	= dcache_readdir,
-	.llseek		= dcache_dir_lseek,
-	.unlocked_ioctl	= autofs_root_ioctl,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl	= autofs_root_compat_ioctl,
-#endif
-};
-
-const struct file_operations autofs_dir_operations = {
-	.open		= autofs_dir_open,
-	.release	= dcache_dir_close,
-	.read		= generic_read_dir,
-	.iterate_shared	= dcache_readdir,
-	.llseek		= dcache_dir_lseek,
-};
-
-const struct inode_operations autofs_dir_inode_operations = {
-	.lookup		= autofs_lookup,
-	.unlink		= autofs_dir_unlink,
-	.symlink	= autofs_dir_symlink,
-	.mkdir		= autofs_dir_mkdir,
-	.rmdir		= autofs_dir_rmdir,
-};
-
-const struct dentry_operations autofs_dentry_operations = {
-	.d_automount	= autofs_d_automount,
-	.d_manage	= autofs_d_manage,
-	.d_release	= autofs_dentry_release,
-};
-
-static void autofs_add_active(struct dentry *dentry)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
-	struct autofs_info *ino;
-
-	ino = autofs_dentry_ino(dentry);
-	if (ino) {
-		spin_lock(&sbi->lookup_lock);
-		if (!ino->active_count) {
-			if (list_empty(&ino->active))
-				list_add(&ino->active, &sbi->active_list);
-		}
-		ino->active_count++;
-		spin_unlock(&sbi->lookup_lock);
-	}
-}
-
-static void autofs_del_active(struct dentry *dentry)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
-	struct autofs_info *ino;
-
-	ino = autofs_dentry_ino(dentry);
-	if (ino) {
-		spin_lock(&sbi->lookup_lock);
-		ino->active_count--;
-		if (!ino->active_count) {
-			if (!list_empty(&ino->active))
-				list_del_init(&ino->active);
-		}
-		spin_unlock(&sbi->lookup_lock);
-	}
-}
-
-static int autofs_dir_open(struct inode *inode, struct file *file)
-{
-	struct dentry *dentry = file->f_path.dentry;
-	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
-
-	pr_debug("file=%p dentry=%p %pd\n", file, dentry, dentry);
-
-	if (autofs_oz_mode(sbi))
-		goto out;
-
-	/*
-	 * An empty directory in an autofs file system is always a
-	 * mount point. The daemon must have failed to mount this
-	 * during lookup so it doesn't exist. This can happen, for
-	 * example, if user space returns an incorrect status for a
-	 * mount request. Otherwise we're doing a readdir on the
-	 * autofs file system so just let the libfs routines handle
-	 * it.
-	 */
-	spin_lock(&sbi->lookup_lock);
-	if (!path_is_mountpoint(&file->f_path) && simple_empty(dentry)) {
-		spin_unlock(&sbi->lookup_lock);
-		return -ENOENT;
-	}
-	spin_unlock(&sbi->lookup_lock);
-
-out:
-	return dcache_dir_open(inode, file);
-}
-
-static void autofs_dentry_release(struct dentry *de)
-{
-	struct autofs_info *ino = autofs_dentry_ino(de);
-	struct autofs_sb_info *sbi = autofs_sbi(de->d_sb);
-
-	pr_debug("releasing %p\n", de);
-
-	if (!ino)
-		return;
-
-	if (sbi) {
-		spin_lock(&sbi->lookup_lock);
-		if (!list_empty(&ino->active))
-			list_del(&ino->active);
-		if (!list_empty(&ino->expiring))
-			list_del(&ino->expiring);
-		spin_unlock(&sbi->lookup_lock);
-	}
-
-	autofs_free_ino(ino);
-}
-
-static struct dentry *autofs_lookup_active(struct dentry *dentry)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
-	struct dentry *parent = dentry->d_parent;
-	const struct qstr *name = &dentry->d_name;
-	unsigned int len = name->len;
-	unsigned int hash = name->hash;
-	const unsigned char *str = name->name;
-	struct list_head *p, *head;
-
-	head = &sbi->active_list;
-	if (list_empty(head))
-		return NULL;
-	spin_lock(&sbi->lookup_lock);
-	list_for_each(p, head) {
-		struct autofs_info *ino;
-		struct dentry *active;
-		const struct qstr *qstr;
-
-		ino = list_entry(p, struct autofs_info, active);
-		active = ino->dentry;
-
-		spin_lock(&active->d_lock);
-
-		/* Already gone? */
-		if ((int) d_count(active) <= 0)
-			goto next;
-
-		qstr = &active->d_name;
-
-		if (active->d_name.hash != hash)
-			goto next;
-		if (active->d_parent != parent)
-			goto next;
-
-		if (qstr->len != len)
-			goto next;
-		if (memcmp(qstr->name, str, len))
-			goto next;
-
-		if (d_unhashed(active)) {
-			dget_dlock(active);
-			spin_unlock(&active->d_lock);
-			spin_unlock(&sbi->lookup_lock);
-			return active;
-		}
-next:
-		spin_unlock(&active->d_lock);
-	}
-	spin_unlock(&sbi->lookup_lock);
-
-	return NULL;
-}
-
-static struct dentry *autofs_lookup_expiring(struct dentry *dentry,
-					     bool rcu_walk)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
-	struct dentry *parent = dentry->d_parent;
-	const struct qstr *name = &dentry->d_name;
-	unsigned int len = name->len;
-	unsigned int hash = name->hash;
-	const unsigned char *str = name->name;
-	struct list_head *p, *head;
-
-	head = &sbi->expiring_list;
-	if (list_empty(head))
-		return NULL;
-	spin_lock(&sbi->lookup_lock);
-	list_for_each(p, head) {
-		struct autofs_info *ino;
-		struct dentry *expiring;
-		const struct qstr *qstr;
-
-		if (rcu_walk) {
-			spin_unlock(&sbi->lookup_lock);
-			return ERR_PTR(-ECHILD);
-		}
-
-		ino = list_entry(p, struct autofs_info, expiring);
-		expiring = ino->dentry;
-
-		spin_lock(&expiring->d_lock);
-
-		/* We've already been dentry_iput or unlinked */
-		if (d_really_is_negative(expiring))
-			goto next;
-
-		qstr = &expiring->d_name;
-
-		if (expiring->d_name.hash != hash)
-			goto next;
-		if (expiring->d_parent != parent)
-			goto next;
-
-		if (qstr->len != len)
-			goto next;
-		if (memcmp(qstr->name, str, len))
-			goto next;
-
-		if (d_unhashed(expiring)) {
-			dget_dlock(expiring);
-			spin_unlock(&expiring->d_lock);
-			spin_unlock(&sbi->lookup_lock);
-			return expiring;
-		}
-next:
-		spin_unlock(&expiring->d_lock);
-	}
-	spin_unlock(&sbi->lookup_lock);
-
-	return NULL;
-}
-
-static int autofs_mount_wait(const struct path *path, bool rcu_walk)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(path->dentry->d_sb);
-	struct autofs_info *ino = autofs_dentry_ino(path->dentry);
-	int status = 0;
-
-	if (ino->flags & AUTOFS_INF_PENDING) {
-		if (rcu_walk)
-			return -ECHILD;
-		pr_debug("waiting for mount name=%pd\n", path->dentry);
-		status = autofs_wait(sbi, path, NFY_MOUNT);
-		pr_debug("mount wait done status=%d\n", status);
-	}
-	ino->last_used = jiffies;
-	return status;
-}
-
-static int do_expire_wait(const struct path *path, bool rcu_walk)
-{
-	struct dentry *dentry = path->dentry;
-	struct dentry *expiring;
-
-	expiring = autofs_lookup_expiring(dentry, rcu_walk);
-	if (IS_ERR(expiring))
-		return PTR_ERR(expiring);
-	if (!expiring)
-		return autofs_expire_wait(path, rcu_walk);
-	else {
-		const struct path this = { .mnt = path->mnt, .dentry = expiring };
-		/*
-		 * If we are racing with expire the request might not
-		 * be quite complete, but the directory has been removed
-		 * so it must have been successful, just wait for it.
-		 */
-		autofs_expire_wait(&this, 0);
-		autofs_del_expiring(expiring);
-		dput(expiring);
-	}
-	return 0;
-}
-
-static struct dentry *autofs_mountpoint_changed(struct path *path)
-{
-	struct dentry *dentry = path->dentry;
-	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
-
-	/*
-	 * If this is an indirect mount the dentry could have gone away
-	 * as a result of an expire and a new one created.
-	 */
-	if (autofs_type_indirect(sbi->type) && d_unhashed(dentry)) {
-		struct dentry *parent = dentry->d_parent;
-		struct autofs_info *ino;
-		struct dentry *new;
-
-		new = d_lookup(parent, &dentry->d_name);
-		if (!new)
-			return NULL;
-		ino = autofs_dentry_ino(new);
-		ino->last_used = jiffies;
-		dput(path->dentry);
-		path->dentry = new;
-	}
-	return path->dentry;
-}
-
-static struct vfsmount *autofs_d_automount(struct path *path)
-{
-	struct dentry *dentry = path->dentry;
-	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
-	struct autofs_info *ino = autofs_dentry_ino(dentry);
-	int status;
-
-	pr_debug("dentry=%p %pd\n", dentry, dentry);
-
-	/* The daemon never triggers a mount. */
-	if (autofs_oz_mode(sbi))
-		return NULL;
-
-	/*
-	 * If an expire request is pending everyone must wait.
-	 * If the expire fails we're still mounted so continue
-	 * the follow and return. A return of -EAGAIN (which only
-	 * happens with indirect mounts) means the expire completed
-	 * and the directory was removed, so just go ahead and try
-	 * the mount.
-	 */
-	status = do_expire_wait(path, 0);
-	if (status && status != -EAGAIN)
-		return NULL;
-
-	/* Callback to the daemon to perform the mount or wait */
-	spin_lock(&sbi->fs_lock);
-	if (ino->flags & AUTOFS_INF_PENDING) {
-		spin_unlock(&sbi->fs_lock);
-		status = autofs_mount_wait(path, 0);
-		if (status)
-			return ERR_PTR(status);
-		goto done;
-	}
-
-	/*
-	 * If the dentry is a symlink it's equivalent to a directory
-	 * having path_is_mountpoint() true, so there's no need to call
-	 * back to the daemon.
-	 */
-	if (d_really_is_positive(dentry) && d_is_symlink(dentry)) {
-		spin_unlock(&sbi->fs_lock);
-		goto done;
-	}
-
-	if (!path_is_mountpoint(path)) {
-		/*
-		 * It's possible that user space hasn't removed directories
-		 * after umounting a rootless multi-mount, although it
-		 * should. For v5 path_has_submounts() is sufficient to
-		 * handle this because the leaves of the directory tree under
-		 * the mount never trigger mounts themselves (they have an
-		 * autofs trigger mount mounted on them). But v4 pseudo direct
-		 * mounts do need the leaves to trigger mounts. In this case
-		 * we have no choice but to use the list_empty() check and
-		 * require user space behave.
-		 */
-		if (sbi->version > 4) {
-			if (path_has_submounts(path)) {
-				spin_unlock(&sbi->fs_lock);
-				goto done;
-			}
-		} else {
-			if (!simple_empty(dentry)) {
-				spin_unlock(&sbi->fs_lock);
-				goto done;
-			}
-		}
-		ino->flags |= AUTOFS_INF_PENDING;
-		spin_unlock(&sbi->fs_lock);
-		status = autofs_mount_wait(path, 0);
-		spin_lock(&sbi->fs_lock);
-		ino->flags &= ~AUTOFS_INF_PENDING;
-		if (status) {
-			spin_unlock(&sbi->fs_lock);
-			return ERR_PTR(status);
-		}
-	}
-	spin_unlock(&sbi->fs_lock);
-done:
-	/* Mount succeeded, check if we ended up with a new dentry */
-	dentry = autofs_mountpoint_changed(path);
-	if (!dentry)
-		return ERR_PTR(-ENOENT);
-
-	return NULL;
-}
-
-static int autofs_d_manage(const struct path *path, bool rcu_walk)
-{
-	struct dentry *dentry = path->dentry;
-	struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
-	struct autofs_info *ino = autofs_dentry_ino(dentry);
-	int status;
-
-	pr_debug("dentry=%p %pd\n", dentry, dentry);
-
-	/* The daemon never waits. */
-	if (autofs_oz_mode(sbi)) {
-		if (!path_is_mountpoint(path))
-			return -EISDIR;
-		return 0;
-	}
-
-	/* Wait for pending expires */
-	if (do_expire_wait(path, rcu_walk) == -ECHILD)
-		return -ECHILD;
-
-	/*
-	 * This dentry may be under construction so wait on mount
-	 * completion.
-	 */
-	status = autofs_mount_wait(path, rcu_walk);
-	if (status)
-		return status;
-
-	if (rcu_walk) {
-		/* We don't need fs_lock in rcu_walk mode,
-		 * just testing 'AUTOFS_INFO_NO_RCU' is enough.
-		 * simple_empty() takes a spinlock, so leave it
-		 * to last.
-		 * We only return -EISDIR when certain this isn't
-		 * a mount-trap.
-		 */
-		struct inode *inode;
-
-		if (ino->flags & AUTOFS_INF_WANT_EXPIRE)
-			return 0;
-		if (path_is_mountpoint(path))
-			return 0;
-		inode = d_inode_rcu(dentry);
-		if (inode && S_ISLNK(inode->i_mode))
-			return -EISDIR;
-		if (list_empty(&dentry->d_subdirs))
-			return 0;
-		if (!simple_empty(dentry))
-			return -EISDIR;
-		return 0;
-	}
-
-	spin_lock(&sbi->fs_lock);
-	/*
-	 * If the dentry has been selected for expire while we slept
-	 * on the lock then it might go away. We'll deal with that in
-	 * ->d_automount() and wait on a new mount if the expire
-	 * succeeds or return here if it doesn't (since there's no
-	 * mount to follow with a rootless multi-mount).
-	 */
-	if (!(ino->flags & AUTOFS_INF_EXPIRING)) {
-		/*
-		 * Any needed mounting has been completed and the path
-		 * updated so check if this is a rootless multi-mount so
-		 * we can avoid needless calls ->d_automount() and avoid
-		 * an incorrect ELOOP error return.
-		 */
-		if ((!path_is_mountpoint(path) && !simple_empty(dentry)) ||
-		    (d_really_is_positive(dentry) && d_is_symlink(dentry)))
-			status = -EISDIR;
-	}
-	spin_unlock(&sbi->fs_lock);
-
-	return status;
-}
-
-/* Lookups in the root directory */
-static struct dentry *autofs_lookup(struct inode *dir,
-				    struct dentry *dentry, unsigned int flags)
-{
-	struct autofs_sb_info *sbi;
-	struct autofs_info *ino;
-	struct dentry *active;
-
-	pr_debug("name = %pd\n", dentry);
-
-	/* File name too long to exist */
-	if (dentry->d_name.len > NAME_MAX)
-		return ERR_PTR(-ENAMETOOLONG);
-
-	sbi = autofs_sbi(dir->i_sb);
-
-	pr_debug("pid = %u, pgrp = %u, catatonic = %d, oz_mode = %d\n",
-		 current->pid, task_pgrp_nr(current), sbi->catatonic,
-		 autofs_oz_mode(sbi));
-
-	active = autofs_lookup_active(dentry);
-	if (active)
-		return active;
-	else {
-		/*
-		 * A dentry that is not within the root can never trigger a
-		 * mount operation, unless the directory already exists, so we
-		 * can return fail immediately.  The daemon however does need
-		 * to create directories within the file system.
-		 */
-		if (!autofs_oz_mode(sbi) && !IS_ROOT(dentry->d_parent))
-			return ERR_PTR(-ENOENT);
-
-		/* Mark entries in the root as mount triggers */
-		if (IS_ROOT(dentry->d_parent) &&
-		    autofs_type_indirect(sbi->type))
-			__managed_dentry_set_managed(dentry);
-
-		ino = autofs_new_ino(sbi);
-		if (!ino)
-			return ERR_PTR(-ENOMEM);
-
-		dentry->d_fsdata = ino;
-		ino->dentry = dentry;
-
-		autofs_add_active(dentry);
-	}
-	return NULL;
-}
-
-static int autofs_dir_symlink(struct inode *dir,
-			       struct dentry *dentry,
-			       const char *symname)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
-	struct autofs_info *ino = autofs_dentry_ino(dentry);
-	struct autofs_info *p_ino;
-	struct inode *inode;
-	size_t size = strlen(symname);
-	char *cp;
-
-	pr_debug("%s <- %pd\n", symname, dentry);
-
-	if (!autofs_oz_mode(sbi))
-		return -EACCES;
-
-	BUG_ON(!ino);
-
-	autofs_clean_ino(ino);
-
-	autofs_del_active(dentry);
-
-	cp = kmalloc(size + 1, GFP_KERNEL);
-	if (!cp)
-		return -ENOMEM;
-
-	strcpy(cp, symname);
-
-	inode = autofs_get_inode(dir->i_sb, S_IFLNK | 0555);
-	if (!inode) {
-		kfree(cp);
-		return -ENOMEM;
-	}
-	inode->i_private = cp;
-	inode->i_size = size;
-	d_add(dentry, inode);
-
-	dget(dentry);
-	atomic_inc(&ino->count);
-	p_ino = autofs_dentry_ino(dentry->d_parent);
-	if (p_ino && !IS_ROOT(dentry))
-		atomic_inc(&p_ino->count);
-
-	dir->i_mtime = current_time(dir);
-
-	return 0;
-}
-
-/*
- * NOTE!
- *
- * Normal filesystems would do a "d_delete()" to tell the VFS dcache
- * that the file no longer exists. However, doing that means that the
- * VFS layer can turn the dentry into a negative dentry.  We don't want
- * this, because the unlink is probably the result of an expire.
- * We simply d_drop it and add it to a expiring list in the super block,
- * which allows the dentry lookup to check for an incomplete expire.
- *
- * If a process is blocked on the dentry waiting for the expire to finish,
- * it will invalidate the dentry and try to mount with a new one.
- *
- * Also see autofs_dir_rmdir()..
- */
-static int autofs_dir_unlink(struct inode *dir, struct dentry *dentry)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
-	struct autofs_info *ino = autofs_dentry_ino(dentry);
-	struct autofs_info *p_ino;
-
-	/* This allows root to remove symlinks */
-	if (!autofs_oz_mode(sbi) && !capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	if (atomic_dec_and_test(&ino->count)) {
-		p_ino = autofs_dentry_ino(dentry->d_parent);
-		if (p_ino && !IS_ROOT(dentry))
-			atomic_dec(&p_ino->count);
-	}
-	dput(ino->dentry);
-
-	d_inode(dentry)->i_size = 0;
-	clear_nlink(d_inode(dentry));
-
-	dir->i_mtime = current_time(dir);
-
-	spin_lock(&sbi->lookup_lock);
-	__autofs_add_expiring(dentry);
-	d_drop(dentry);
-	spin_unlock(&sbi->lookup_lock);
-
-	return 0;
-}
-
-/*
- * Version 4 of autofs provides a pseudo direct mount implementation
- * that relies on directories at the leaves of a directory tree under
- * an indirect mount to trigger mounts. To allow for this we need to
- * set the DMANAGED_AUTOMOUNT and DMANAGED_TRANSIT flags on the leaves
- * of the directory tree. There is no need to clear the automount flag
- * following a mount or restore it after an expire because these mounts
- * are always covered. However, it is necessary to ensure that these
- * flags are clear on non-empty directories to avoid unnecessary calls
- * during path walks.
- */
-static void autofs_set_leaf_automount_flags(struct dentry *dentry)
-{
-	struct dentry *parent;
-
-	/* root and dentrys in the root are already handled */
-	if (IS_ROOT(dentry->d_parent))
-		return;
-
-	managed_dentry_set_managed(dentry);
-
-	parent = dentry->d_parent;
-	/* only consider parents below dentrys in the root */
-	if (IS_ROOT(parent->d_parent))
-		return;
-	managed_dentry_clear_managed(parent);
-}
-
-static void autofs_clear_leaf_automount_flags(struct dentry *dentry)
-{
-	struct list_head *d_child;
-	struct dentry *parent;
-
-	/* flags for dentrys in the root are handled elsewhere */
-	if (IS_ROOT(dentry->d_parent))
-		return;
-
-	managed_dentry_clear_managed(dentry);
-
-	parent = dentry->d_parent;
-	/* only consider parents below dentrys in the root */
-	if (IS_ROOT(parent->d_parent))
-		return;
-	d_child = &dentry->d_child;
-	/* Set parent managed if it's becoming empty */
-	if (d_child->next == &parent->d_subdirs &&
-	    d_child->prev == &parent->d_subdirs)
-		managed_dentry_set_managed(parent);
-}
-
-static int autofs_dir_rmdir(struct inode *dir, struct dentry *dentry)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
-	struct autofs_info *ino = autofs_dentry_ino(dentry);
-	struct autofs_info *p_ino;
-
-	pr_debug("dentry %p, removing %pd\n", dentry, dentry);
-
-	if (!autofs_oz_mode(sbi))
-		return -EACCES;
-
-	spin_lock(&sbi->lookup_lock);
-	if (!simple_empty(dentry)) {
-		spin_unlock(&sbi->lookup_lock);
-		return -ENOTEMPTY;
-	}
-	__autofs_add_expiring(dentry);
-	d_drop(dentry);
-	spin_unlock(&sbi->lookup_lock);
-
-	if (sbi->version < 5)
-		autofs_clear_leaf_automount_flags(dentry);
-
-	if (atomic_dec_and_test(&ino->count)) {
-		p_ino = autofs_dentry_ino(dentry->d_parent);
-		if (p_ino && dentry->d_parent != dentry)
-			atomic_dec(&p_ino->count);
-	}
-	dput(ino->dentry);
-	d_inode(dentry)->i_size = 0;
-	clear_nlink(d_inode(dentry));
-
-	if (dir->i_nlink)
-		drop_nlink(dir);
-
-	return 0;
-}
-
-static int autofs_dir_mkdir(struct inode *dir,
-			    struct dentry *dentry, umode_t mode)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
-	struct autofs_info *ino = autofs_dentry_ino(dentry);
-	struct autofs_info *p_ino;
-	struct inode *inode;
-
-	if (!autofs_oz_mode(sbi))
-		return -EACCES;
-
-	pr_debug("dentry %p, creating %pd\n", dentry, dentry);
-
-	BUG_ON(!ino);
-
-	autofs_clean_ino(ino);
-
-	autofs_del_active(dentry);
-
-	inode = autofs_get_inode(dir->i_sb, S_IFDIR | mode);
-	if (!inode)
-		return -ENOMEM;
-	d_add(dentry, inode);
-
-	if (sbi->version < 5)
-		autofs_set_leaf_automount_flags(dentry);
-
-	dget(dentry);
-	atomic_inc(&ino->count);
-	p_ino = autofs_dentry_ino(dentry->d_parent);
-	if (p_ino && !IS_ROOT(dentry))
-		atomic_inc(&p_ino->count);
-	inc_nlink(dir);
-	dir->i_mtime = current_time(dir);
-
-	return 0;
-}
-
-/* Get/set timeout ioctl() operation */
-#ifdef CONFIG_COMPAT
-static inline int autofs_compat_get_set_timeout(struct autofs_sb_info *sbi,
-						 compat_ulong_t __user *p)
-{
-	unsigned long ntimeout;
-	int rv;
-
-	rv = get_user(ntimeout, p);
-	if (rv)
-		goto error;
-
-	rv = put_user(sbi->exp_timeout/HZ, p);
-	if (rv)
-		goto error;
-
-	if (ntimeout > UINT_MAX/HZ)
-		sbi->exp_timeout = 0;
-	else
-		sbi->exp_timeout = ntimeout * HZ;
-
-	return 0;
-error:
-	return rv;
-}
-#endif
-
-static inline int autofs_get_set_timeout(struct autofs_sb_info *sbi,
-					  unsigned long __user *p)
-{
-	unsigned long ntimeout;
-	int rv;
-
-	rv = get_user(ntimeout, p);
-	if (rv)
-		goto error;
-
-	rv = put_user(sbi->exp_timeout/HZ, p);
-	if (rv)
-		goto error;
-
-	if (ntimeout > ULONG_MAX/HZ)
-		sbi->exp_timeout = 0;
-	else
-		sbi->exp_timeout = ntimeout * HZ;
-
-	return 0;
-error:
-	return rv;
-}
-
-/* Return protocol version */
-static inline int autofs_get_protover(struct autofs_sb_info *sbi,
-				       int __user *p)
-{
-	return put_user(sbi->version, p);
-}
-
-/* Return protocol sub version */
-static inline int autofs_get_protosubver(struct autofs_sb_info *sbi,
-					  int __user *p)
-{
-	return put_user(sbi->sub_version, p);
-}
-
-/*
-* Tells the daemon whether it can umount the autofs mount.
-*/
-static inline int autofs_ask_umount(struct vfsmount *mnt, int __user *p)
-{
-	int status = 0;
-
-	if (may_umount(mnt))
-		status = 1;
-
-	pr_debug("may umount %d\n", status);
-
-	status = put_user(status, p);
-
-	return status;
-}
-
-/* Identify autofs_dentries - this is so we can tell if there's
- * an extra dentry refcount or not.  We only hold a refcount on the
- * dentry if its non-negative (ie, d_inode != NULL)
- */
-int is_autofs_dentry(struct dentry *dentry)
-{
-	return dentry && d_really_is_positive(dentry) &&
-		dentry->d_op == &autofs_dentry_operations &&
-		dentry->d_fsdata != NULL;
-}
-
-/*
- * ioctl()'s on the root directory is the chief method for the daemon to
- * generate kernel reactions
- */
-static int autofs_root_ioctl_unlocked(struct inode *inode, struct file *filp,
-				       unsigned int cmd, unsigned long arg)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(inode->i_sb);
-	void __user *p = (void __user *)arg;
-
-	pr_debug("cmd = 0x%08x, arg = 0x%08lx, sbi = %p, pgrp = %u\n",
-		 cmd, arg, sbi, task_pgrp_nr(current));
-
-	if (_IOC_TYPE(cmd) != _IOC_TYPE(AUTOFS_IOC_FIRST) ||
-	     _IOC_NR(cmd) - _IOC_NR(AUTOFS_IOC_FIRST) >= AUTOFS_IOC_COUNT)
-		return -ENOTTY;
-
-	if (!autofs_oz_mode(sbi) && !capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	switch (cmd) {
-	case AUTOFS_IOC_READY:	/* Wait queue: go ahead and retry */
-		return autofs_wait_release(sbi, (autofs_wqt_t) arg, 0);
-	case AUTOFS_IOC_FAIL:	/* Wait queue: fail with ENOENT */
-		return autofs_wait_release(sbi, (autofs_wqt_t) arg, -ENOENT);
-	case AUTOFS_IOC_CATATONIC: /* Enter catatonic mode (daemon shutdown) */
-		autofs_catatonic_mode(sbi);
-		return 0;
-	case AUTOFS_IOC_PROTOVER: /* Get protocol version */
-		return autofs_get_protover(sbi, p);
-	case AUTOFS_IOC_PROTOSUBVER: /* Get protocol sub version */
-		return autofs_get_protosubver(sbi, p);
-	case AUTOFS_IOC_SETTIMEOUT:
-		return autofs_get_set_timeout(sbi, p);
-#ifdef CONFIG_COMPAT
-	case AUTOFS_IOC_SETTIMEOUT32:
-		return autofs_compat_get_set_timeout(sbi, p);
-#endif
-
-	case AUTOFS_IOC_ASKUMOUNT:
-		return autofs_ask_umount(filp->f_path.mnt, p);
-
-	/* return a single thing to expire */
-	case AUTOFS_IOC_EXPIRE:
-		return autofs_expire_run(inode->i_sb, filp->f_path.mnt, sbi, p);
-	/* same as above, but can send multiple expires through pipe */
-	case AUTOFS_IOC_EXPIRE_MULTI:
-		return autofs_expire_multi(inode->i_sb,
-					   filp->f_path.mnt, sbi, p);
-
-	default:
-		return -EINVAL;
-	}
-}
-
-static long autofs_root_ioctl(struct file *filp,
-			       unsigned int cmd, unsigned long arg)
-{
-	struct inode *inode = file_inode(filp);
-
-	return autofs_root_ioctl_unlocked(inode, filp, cmd, arg);
-}
-
-#ifdef CONFIG_COMPAT
-static long autofs_root_compat_ioctl(struct file *filp,
-				      unsigned int cmd, unsigned long arg)
-{
-	struct inode *inode = file_inode(filp);
-	int ret;
-
-	if (cmd == AUTOFS_IOC_READY || cmd == AUTOFS_IOC_FAIL)
-		ret = autofs_root_ioctl_unlocked(inode, filp, cmd, arg);
-	else
-		ret = autofs_root_ioctl_unlocked(inode, filp, cmd,
-					      (unsigned long) compat_ptr(arg));
-
-	return ret;
-}
-#endif
diff --git a/fs/autofs4/symlink.c b/fs/autofs4/symlink.c
deleted file mode 100644
index aad3902c0cc1..000000000000
--- a/fs/autofs4/symlink.c
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- */
-
-#include "autofs_i.h"
-
-static const char *autofs_get_link(struct dentry *dentry,
-				   struct inode *inode,
-				   struct delayed_call *done)
-{
-	struct autofs_sb_info *sbi;
-	struct autofs_info *ino;
-
-	if (!dentry)
-		return ERR_PTR(-ECHILD);
-	sbi = autofs_sbi(dentry->d_sb);
-	ino = autofs_dentry_ino(dentry);
-	if (ino && !autofs_oz_mode(sbi))
-		ino->last_used = jiffies;
-	return d_inode(dentry)->i_private;
-}
-
-const struct inode_operations autofs_symlink_inode_operations = {
-	.get_link	= autofs_get_link
-};
diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
deleted file mode 100644
index 8a566fa66afe..000000000000
--- a/fs/autofs4/waitq.c
+++ /dev/null
@@ -1,559 +0,0 @@
-/*
- * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
- * Copyright 2001-2006 Ian Kent <raven@themaw.net>
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- */
-
-#include <linux/slab.h>
-#include <linux/time.h>
-#include <linux/signal.h>
-#include <linux/sched/signal.h>
-#include <linux/file.h>
-#include "autofs_i.h"
-
-/* We make this a static variable rather than a part of the superblock; it
- * is better if we don't reassign numbers easily even across filesystems
- */
-static autofs_wqt_t autofs_next_wait_queue = 1;
-
-void autofs_catatonic_mode(struct autofs_sb_info *sbi)
-{
-	struct autofs_wait_queue *wq, *nwq;
-
-	mutex_lock(&sbi->wq_mutex);
-	if (sbi->catatonic) {
-		mutex_unlock(&sbi->wq_mutex);
-		return;
-	}
-
-	pr_debug("entering catatonic mode\n");
-
-	sbi->catatonic = 1;
-	wq = sbi->queues;
-	sbi->queues = NULL;	/* Erase all wait queues */
-	while (wq) {
-		nwq = wq->next;
-		wq->status = -ENOENT; /* Magic is gone - report failure */
-		kfree(wq->name.name);
-		wq->name.name = NULL;
-		wq->wait_ctr--;
-		wake_up_interruptible(&wq->queue);
-		wq = nwq;
-	}
-	fput(sbi->pipe);	/* Close the pipe */
-	sbi->pipe = NULL;
-	sbi->pipefd = -1;
-	mutex_unlock(&sbi->wq_mutex);
-}
-
-static int autofs_write(struct autofs_sb_info *sbi,
-			struct file *file, const void *addr, int bytes)
-{
-	unsigned long sigpipe, flags;
-	const char *data = (const char *)addr;
-	ssize_t wr = 0;
-
-	sigpipe = sigismember(&current->pending.signal, SIGPIPE);
-
-	mutex_lock(&sbi->pipe_mutex);
-	while (bytes) {
-		wr = __kernel_write(file, data, bytes, &file->f_pos);
-		if (wr <= 0)
-			break;
-		data += wr;
-		bytes -= wr;
-	}
-	mutex_unlock(&sbi->pipe_mutex);
-
-	/* Keep the currently executing process from receiving a
-	 * SIGPIPE unless it was already supposed to get one
-	 */
-	if (wr == -EPIPE && !sigpipe) {
-		spin_lock_irqsave(&current->sighand->siglock, flags);
-		sigdelset(&current->pending.signal, SIGPIPE);
-		recalc_sigpending();
-		spin_unlock_irqrestore(&current->sighand->siglock, flags);
-	}
-
-	/* if 'wr' returned 0 (impossible) we assume -EIO (safe) */
-	return bytes == 0 ? 0 : wr < 0 ? wr : -EIO;
-}
-
-static void autofs_notify_daemon(struct autofs_sb_info *sbi,
-				 struct autofs_wait_queue *wq,
-				 int type)
-{
-	union {
-		struct autofs_packet_hdr hdr;
-		union autofs_packet_union v4_pkt;
-		union autofs_v5_packet_union v5_pkt;
-	} pkt;
-	struct file *pipe = NULL;
-	size_t pktsz;
-	int ret;
-
-	pr_debug("wait id = 0x%08lx, name = %.*s, type=%d\n",
-		 (unsigned long) wq->wait_queue_token,
-		 wq->name.len, wq->name.name, type);
-
-	memset(&pkt, 0, sizeof(pkt)); /* For security reasons */
-
-	pkt.hdr.proto_version = sbi->version;
-	pkt.hdr.type = type;
-
-	switch (type) {
-	/* Kernel protocol v4 missing and expire packets */
-	case autofs_ptype_missing:
-	{
-		struct autofs_packet_missing *mp = &pkt.v4_pkt.missing;
-
-		pktsz = sizeof(*mp);
-
-		mp->wait_queue_token = wq->wait_queue_token;
-		mp->len = wq->name.len;
-		memcpy(mp->name, wq->name.name, wq->name.len);
-		mp->name[wq->name.len] = '\0';
-		break;
-	}
-	case autofs_ptype_expire_multi:
-	{
-		struct autofs_packet_expire_multi *ep =
-					&pkt.v4_pkt.expire_multi;
-
-		pktsz = sizeof(*ep);
-
-		ep->wait_queue_token = wq->wait_queue_token;
-		ep->len = wq->name.len;
-		memcpy(ep->name, wq->name.name, wq->name.len);
-		ep->name[wq->name.len] = '\0';
-		break;
-	}
-	/*
-	 * Kernel protocol v5 packet for handling indirect and direct
-	 * mount missing and expire requests
-	 */
-	case autofs_ptype_missing_indirect:
-	case autofs_ptype_expire_indirect:
-	case autofs_ptype_missing_direct:
-	case autofs_ptype_expire_direct:
-	{
-		struct autofs_v5_packet *packet = &pkt.v5_pkt.v5_packet;
-		struct user_namespace *user_ns = sbi->pipe->f_cred->user_ns;
-
-		pktsz = sizeof(*packet);
-
-		packet->wait_queue_token = wq->wait_queue_token;
-		packet->len = wq->name.len;
-		memcpy(packet->name, wq->name.name, wq->name.len);
-		packet->name[wq->name.len] = '\0';
-		packet->dev = wq->dev;
-		packet->ino = wq->ino;
-		packet->uid = from_kuid_munged(user_ns, wq->uid);
-		packet->gid = from_kgid_munged(user_ns, wq->gid);
-		packet->pid = wq->pid;
-		packet->tgid = wq->tgid;
-		break;
-	}
-	default:
-		pr_warn("bad type %d!\n", type);
-		mutex_unlock(&sbi->wq_mutex);
-		return;
-	}
-
-	pipe = get_file(sbi->pipe);
-
-	mutex_unlock(&sbi->wq_mutex);
-
-	switch (ret = autofs_write(sbi, pipe, &pkt, pktsz)) {
-	case 0:
-		break;
-	case -ENOMEM:
-	case -ERESTARTSYS:
-		/* Just fail this one */
-		autofs_wait_release(sbi, wq->wait_queue_token, ret);
-		break;
-	default:
-		autofs_catatonic_mode(sbi);
-		break;
-	}
-	fput(pipe);
-}
-
-static int autofs_getpath(struct autofs_sb_info *sbi,
-			  struct dentry *dentry, char **name)
-{
-	struct dentry *root = sbi->sb->s_root;
-	struct dentry *tmp;
-	char *buf;
-	char *p;
-	int len;
-	unsigned seq;
-
-rename_retry:
-	buf = *name;
-	len = 0;
-
-	seq = read_seqbegin(&rename_lock);
-	rcu_read_lock();
-	spin_lock(&sbi->fs_lock);
-	for (tmp = dentry ; tmp != root ; tmp = tmp->d_parent)
-		len += tmp->d_name.len + 1;
-
-	if (!len || --len > NAME_MAX) {
-		spin_unlock(&sbi->fs_lock);
-		rcu_read_unlock();
-		if (read_seqretry(&rename_lock, seq))
-			goto rename_retry;
-		return 0;
-	}
-
-	*(buf + len) = '\0';
-	p = buf + len - dentry->d_name.len;
-	strncpy(p, dentry->d_name.name, dentry->d_name.len);
-
-	for (tmp = dentry->d_parent; tmp != root ; tmp = tmp->d_parent) {
-		*(--p) = '/';
-		p -= tmp->d_name.len;
-		strncpy(p, tmp->d_name.name, tmp->d_name.len);
-	}
-	spin_unlock(&sbi->fs_lock);
-	rcu_read_unlock();
-	if (read_seqretry(&rename_lock, seq))
-		goto rename_retry;
-
-	return len;
-}
-
-static struct autofs_wait_queue *
-autofs_find_wait(struct autofs_sb_info *sbi, const struct qstr *qstr)
-{
-	struct autofs_wait_queue *wq;
-
-	for (wq = sbi->queues; wq; wq = wq->next) {
-		if (wq->name.hash == qstr->hash &&
-		    wq->name.len == qstr->len &&
-		    wq->name.name &&
-		    !memcmp(wq->name.name, qstr->name, qstr->len))
-			break;
-	}
-	return wq;
-}
-
-/*
- * Check if we have a valid request.
- * Returns
- * 1 if the request should continue.
- *   In this case we can return an autofs_wait_queue entry if one is
- *   found or NULL to idicate a new wait needs to be created.
- * 0 or a negative errno if the request shouldn't continue.
- */
-static int validate_request(struct autofs_wait_queue **wait,
-			    struct autofs_sb_info *sbi,
-			    const struct qstr *qstr,
-			    const struct path *path, enum autofs_notify notify)
-{
-	struct dentry *dentry = path->dentry;
-	struct autofs_wait_queue *wq;
-	struct autofs_info *ino;
-
-	if (sbi->catatonic)
-		return -ENOENT;
-
-	/* Wait in progress, continue; */
-	wq = autofs_find_wait(sbi, qstr);
-	if (wq) {
-		*wait = wq;
-		return 1;
-	}
-
-	*wait = NULL;
-
-	/* If we don't yet have any info this is a new request */
-	ino = autofs_dentry_ino(dentry);
-	if (!ino)
-		return 1;
-
-	/*
-	 * If we've been asked to wait on an existing expire (NFY_NONE)
-	 * but there is no wait in the queue ...
-	 */
-	if (notify == NFY_NONE) {
-		/*
-		 * Either we've betean the pending expire to post it's
-		 * wait or it finished while we waited on the mutex.
-		 * So we need to wait till either, the wait appears
-		 * or the expire finishes.
-		 */
-
-		while (ino->flags & AUTOFS_INF_EXPIRING) {
-			mutex_unlock(&sbi->wq_mutex);
-			schedule_timeout_interruptible(HZ/10);
-			if (mutex_lock_interruptible(&sbi->wq_mutex))
-				return -EINTR;
-
-			if (sbi->catatonic)
-				return -ENOENT;
-
-			wq = autofs_find_wait(sbi, qstr);
-			if (wq) {
-				*wait = wq;
-				return 1;
-			}
-		}
-
-		/*
-		 * Not ideal but the status has already gone. Of the two
-		 * cases where we wait on NFY_NONE neither depend on the
-		 * return status of the wait.
-		 */
-		return 0;
-	}
-
-	/*
-	 * If we've been asked to trigger a mount and the request
-	 * completed while we waited on the mutex ...
-	 */
-	if (notify == NFY_MOUNT) {
-		struct dentry *new = NULL;
-		struct path this;
-		int valid = 1;
-
-		/*
-		 * If the dentry was successfully mounted while we slept
-		 * on the wait queue mutex we can return success. If it
-		 * isn't mounted (doesn't have submounts for the case of
-		 * a multi-mount with no mount at it's base) we can
-		 * continue on and create a new request.
-		 */
-		if (!IS_ROOT(dentry)) {
-			if (d_unhashed(dentry) &&
-			    d_really_is_positive(dentry)) {
-				struct dentry *parent = dentry->d_parent;
-
-				new = d_lookup(parent, &dentry->d_name);
-				if (new)
-					dentry = new;
-			}
-		}
-		this.mnt = path->mnt;
-		this.dentry = dentry;
-		if (path_has_submounts(&this))
-			valid = 0;
-
-		if (new)
-			dput(new);
-		return valid;
-	}
-
-	return 1;
-}
-
-int autofs_wait(struct autofs_sb_info *sbi,
-		 const struct path *path, enum autofs_notify notify)
-{
-	struct dentry *dentry = path->dentry;
-	struct autofs_wait_queue *wq;
-	struct qstr qstr;
-	char *name;
-	int status, ret, type;
-	pid_t pid;
-	pid_t tgid;
-
-	/* In catatonic mode, we don't wait for nobody */
-	if (sbi->catatonic)
-		return -ENOENT;
-
-	/*
-	 * Try translating pids to the namespace of the daemon.
-	 *
-	 * Zero means failure: we are in an unrelated pid namespace.
-	 */
-	pid = task_pid_nr_ns(current, ns_of_pid(sbi->oz_pgrp));
-	tgid = task_tgid_nr_ns(current, ns_of_pid(sbi->oz_pgrp));
-	if (pid == 0 || tgid == 0)
-		return -ENOENT;
-
-	if (d_really_is_negative(dentry)) {
-		/*
-		 * A wait for a negative dentry is invalid for certain
-		 * cases. A direct or offset mount "always" has its mount
-		 * point directory created and so the request dentry must
-		 * be positive or the map key doesn't exist. The situation
-		 * is very similar for indirect mounts except only dentrys
-		 * in the root of the autofs file system may be negative.
-		 */
-		if (autofs_type_trigger(sbi->type))
-			return -ENOENT;
-		else if (!IS_ROOT(dentry->d_parent))
-			return -ENOENT;
-	}
-
-	name = kmalloc(NAME_MAX + 1, GFP_KERNEL);
-	if (!name)
-		return -ENOMEM;
-
-	/* If this is a direct mount request create a dummy name */
-	if (IS_ROOT(dentry) && autofs_type_trigger(sbi->type))
-		qstr.len = sprintf(name, "%p", dentry);
-	else {
-		qstr.len = autofs_getpath(sbi, dentry, &name);
-		if (!qstr.len) {
-			kfree(name);
-			return -ENOENT;
-		}
-	}
-	qstr.name = name;
-	qstr.hash = full_name_hash(dentry, name, qstr.len);
-
-	if (mutex_lock_interruptible(&sbi->wq_mutex)) {
-		kfree(qstr.name);
-		return -EINTR;
-	}
-
-	ret = validate_request(&wq, sbi, &qstr, path, notify);
-	if (ret <= 0) {
-		if (ret != -EINTR)
-			mutex_unlock(&sbi->wq_mutex);
-		kfree(qstr.name);
-		return ret;
-	}
-
-	if (!wq) {
-		/* Create a new wait queue */
-		wq = kmalloc(sizeof(struct autofs_wait_queue), GFP_KERNEL);
-		if (!wq) {
-			kfree(qstr.name);
-			mutex_unlock(&sbi->wq_mutex);
-			return -ENOMEM;
-		}
-
-		wq->wait_queue_token = autofs_next_wait_queue;
-		if (++autofs_next_wait_queue == 0)
-			autofs_next_wait_queue = 1;
-		wq->next = sbi->queues;
-		sbi->queues = wq;
-		init_waitqueue_head(&wq->queue);
-		memcpy(&wq->name, &qstr, sizeof(struct qstr));
-		wq->dev = autofs_get_dev(sbi);
-		wq->ino = autofs_get_ino(sbi);
-		wq->uid = current_uid();
-		wq->gid = current_gid();
-		wq->pid = pid;
-		wq->tgid = tgid;
-		wq->status = -EINTR; /* Status return if interrupted */
-		wq->wait_ctr = 2;
-
-		if (sbi->version < 5) {
-			if (notify == NFY_MOUNT)
-				type = autofs_ptype_missing;
-			else
-				type = autofs_ptype_expire_multi;
-		} else {
-			if (notify == NFY_MOUNT)
-				type = autofs_type_trigger(sbi->type) ?
-					autofs_ptype_missing_direct :
-					 autofs_ptype_missing_indirect;
-			else
-				type = autofs_type_trigger(sbi->type) ?
-					autofs_ptype_expire_direct :
-					autofs_ptype_expire_indirect;
-		}
-
-		pr_debug("new wait id = 0x%08lx, name = %.*s, nfy=%d\n",
-			 (unsigned long) wq->wait_queue_token, wq->name.len,
-			 wq->name.name, notify);
-
-		/*
-		 * autofs_notify_daemon() may block; it will unlock ->wq_mutex
-		 */
-		autofs_notify_daemon(sbi, wq, type);
-	} else {
-		wq->wait_ctr++;
-		pr_debug("existing wait id = 0x%08lx, name = %.*s, nfy=%d\n",
-			 (unsigned long) wq->wait_queue_token, wq->name.len,
-			 wq->name.name, notify);
-		mutex_unlock(&sbi->wq_mutex);
-		kfree(qstr.name);
-	}
-
-	/*
-	 * wq->name.name is NULL iff the lock is already released
-	 * or the mount has been made catatonic.
-	 */
-	wait_event_killable(wq->queue, wq->name.name == NULL);
-	status = wq->status;
-
-	/*
-	 * For direct and offset mounts we need to track the requester's
-	 * uid and gid in the dentry info struct. This is so it can be
-	 * supplied, on request, by the misc device ioctl interface.
-	 * This is needed during daemon resatart when reconnecting
-	 * to existing, active, autofs mounts. The uid and gid (and
-	 * related string values) may be used for macro substitution
-	 * in autofs mount maps.
-	 */
-	if (!status) {
-		struct autofs_info *ino;
-		struct dentry *de = NULL;
-
-		/* direct mount or browsable map */
-		ino = autofs_dentry_ino(dentry);
-		if (!ino) {
-			/* If not lookup actual dentry used */
-			de = d_lookup(dentry->d_parent, &dentry->d_name);
-			if (de)
-				ino = autofs_dentry_ino(de);
-		}
-
-		/* Set mount requester */
-		if (ino) {
-			spin_lock(&sbi->fs_lock);
-			ino->uid = wq->uid;
-			ino->gid = wq->gid;
-			spin_unlock(&sbi->fs_lock);
-		}
-
-		if (de)
-			dput(de);
-	}
-
-	/* Are we the last process to need status? */
-	mutex_lock(&sbi->wq_mutex);
-	if (!--wq->wait_ctr)
-		kfree(wq);
-	mutex_unlock(&sbi->wq_mutex);
-
-	return status;
-}
-
-
-int autofs_wait_release(struct autofs_sb_info *sbi,
-			autofs_wqt_t wait_queue_token, int status)
-{
-	struct autofs_wait_queue *wq, **wql;
-
-	mutex_lock(&sbi->wq_mutex);
-	for (wql = &sbi->queues; (wq = *wql) != NULL; wql = &wq->next) {
-		if (wq->wait_queue_token == wait_queue_token)
-			break;
-	}
-
-	if (!wq) {
-		mutex_unlock(&sbi->wq_mutex);
-		return -EINVAL;
-	}
-
-	*wql = wq->next;	/* Unlink from chain */
-	kfree(wq->name.name);
-	wq->name.name = NULL;	/* Do not wait on this queue */
-	wq->status = status;
-	wake_up(&wq->queue);
-	if (!--wq->wait_ctr)
-		kfree(wq);
-	mutex_unlock(&sbi->wq_mutex);
-
-	return 0;
-}