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    Subject[PATCH 07/10] autofs - delete fs/autofs4 source files
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    Date
    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;
    -}
    \
     
     \ /
      Last update: 2018-05-14 05:16    [W:8.555 / U:0.080 seconds]
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