diff options
Diffstat (limited to 'fs/autofs4/autofs_i.h')
| -rw-r--r-- | fs/autofs4/autofs_i.h | 273 |
1 files changed, 0 insertions, 273 deletions
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 *); |