1/* fs/ internal definitions
  2 *
  3 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
  4 * Written by David Howells (dhowells@redhat.com)
  5 *
  6 * This program is free software; you can redistribute it and/or
  7 * modify it under the terms of the GNU General Public License
  8 * as published by the Free Software Foundation; either version
  9 * 2 of the License, or (at your option) any later version.
 10 */
 11
 
 
 12struct super_block;
 13struct file_system_type;
 14struct iomap;
 15struct iomap_ops;
 16struct linux_binprm;
 17struct path;
 18struct mount;
 19struct shrink_control;
 20
 21/*
 22 * block_dev.c
 23 */
 24#ifdef CONFIG_BLOCK
 25extern void __init bdev_cache_init(void);
 26
 27extern int __sync_blockdev(struct block_device *bdev, int wait);
 28
 29#else
 30static inline void bdev_cache_init(void)
 31{
 32}
 33
 34static inline int __sync_blockdev(struct block_device *bdev, int wait)
 35{
 36	return 0;
 37}
 38#endif
 39
 40/*
 41 * buffer.c
 42 */
 43extern void guard_bio_eod(int rw, struct bio *bio);
 44extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
 45		get_block_t *get_block, struct iomap *iomap);
 46
 47/*
 48 * char_dev.c
 49 */
 50extern void __init chrdev_init(void);
 51
 52/*
 53 * namei.c
 54 */
 55extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
 56extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
 57			   const char *, unsigned int, struct path *);
 58
 59/*
 60 * namespace.c
 61 */
 62extern void *copy_mount_options(const void __user *);
 63extern char *copy_mount_string(const void __user *);
 64
 65extern struct vfsmount *lookup_mnt(const struct path *);
 66extern int finish_automount(struct vfsmount *, struct path *);
 67
 
 
 68extern int sb_prepare_remount_readonly(struct super_block *);
 69
 70extern void __init mnt_init(void);
 71
 72extern int __mnt_want_write(struct vfsmount *);
 73extern int __mnt_want_write_file(struct file *);
 74extern void __mnt_drop_write(struct vfsmount *);
 75extern void __mnt_drop_write_file(struct file *);
 76
 77/*
 78 * fs_struct.c
 79 */
 80extern void chroot_fs_refs(const struct path *, const struct path *);
 81
 82/*
 83 * file_table.c
 84 */
 
 
 
 85extern struct file *get_empty_filp(void);
 86
 87/*
 88 * super.c
 89 */
 90extern int do_remount_sb(struct super_block *, int, void *, int);
 91extern bool trylock_super(struct super_block *sb);
 92extern struct dentry *mount_fs(struct file_system_type *,
 93			       int, const char *, void *);
 94extern struct super_block *user_get_super(dev_t);
 95
 96/*
 97 * open.c
 98 */
 
 
 
 99struct open_flags {
100	int open_flag;
101	umode_t mode;
102	int acc_mode;
103	int intent;
104	int lookup_flags;
105};
106extern struct file *do_filp_open(int dfd, struct filename *pathname,
107		const struct open_flags *op);
108extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
109		const char *, const struct open_flags *);
110
111extern long do_handle_open(int mountdirfd,
112			   struct file_handle __user *ufh, int open_flag);
113extern int open_check_o_direct(struct file *f);
114extern int vfs_open(const struct path *, struct file *, const struct cred *);
115extern struct file *filp_clone_open(struct file *);
116
117/*
118 * inode.c
119 */
120extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
121extern void inode_add_lru(struct inode *inode);
122extern int dentry_needs_remove_privs(struct dentry *dentry);
123
124extern bool __atime_needs_update(const struct path *, struct inode *, bool);
125static inline bool atime_needs_update_rcu(const struct path *path,
126					  struct inode *inode)
127{
128	return __atime_needs_update(path, inode, true);
129}
130
131extern bool atime_needs_update_rcu(const struct path *, struct inode *);
132
133/*
134 * fs-writeback.c
135 */
136extern void inode_io_list_del(struct inode *inode);
137
138extern long get_nr_dirty_inodes(void);
139extern void evict_inodes(struct super_block *);
140extern int invalidate_inodes(struct super_block *, bool);
141
142/*
143 * dcache.c
144 */
145extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
146extern int d_set_mounted(struct dentry *dentry);
147extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
148extern struct dentry *d_alloc_cursor(struct dentry *);
149
150/*
151 * read_write.c
152 */
153extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
154
155/*
156 * pipe.c
157 */
158extern const struct file_operations pipefifo_fops;
159
160/*
161 * fs_pin.c
162 */
163extern void group_pin_kill(struct hlist_head *p);
164extern void mnt_pin_kill(struct mount *m);
165
166/*
167 * fs/nsfs.c
168 */
169extern const struct dentry_operations ns_dentry_operations;
170
171/*
172 * fs/ioctl.c
173 */
174extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
175		    unsigned long arg);
176extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
177
178/*
179 * iomap support:
180 */
181typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
182		void *data, struct iomap *iomap);
183
184loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
185		unsigned flags, struct iomap_ops *ops, void *data,
186		iomap_actor_t actor);
187
188/* direct-io.c: */
189int sb_init_dio_done_wq(struct super_block *sb);

  1/* fs/ internal definitions
  2 *
  3 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
  4 * Written by David Howells (dhowells@redhat.com)
  5 *
  6 * This program is free software; you can redistribute it and/or
  7 * modify it under the terms of the GNU General Public License
  8 * as published by the Free Software Foundation; either version
  9 * 2 of the License, or (at your option) any later version.
 10 */
 11
 12#include <linux/lglock.h>
 13
 14struct super_block;
 15struct file_system_type;
 
 
 16struct linux_binprm;
 17struct path;
 18struct mount;
 
 19
 20/*
 21 * block_dev.c
 22 */
 23#ifdef CONFIG_BLOCK
 24extern void __init bdev_cache_init(void);
 25
 26extern int __sync_blockdev(struct block_device *bdev, int wait);
 27
 28#else
 29static inline void bdev_cache_init(void)
 30{
 31}
 32
 33static inline int __sync_blockdev(struct block_device *bdev, int wait)
 34{
 35	return 0;
 36}
 37#endif
 38
 39/*
 
 
 
 
 
 
 
 40 * char_dev.c
 41 */
 42extern void __init chrdev_init(void);
 43
 44/*
 
 
 
 
 
 
 
 45 * namespace.c
 46 */
 47extern int copy_mount_options(const void __user *, unsigned long *);
 48extern int copy_mount_string(const void __user *, char **);
 49
 50extern struct vfsmount *lookup_mnt(struct path *);
 51extern int finish_automount(struct vfsmount *, struct path *);
 52
 53extern void mnt_make_longterm(struct vfsmount *);
 54extern void mnt_make_shortterm(struct vfsmount *);
 55extern int sb_prepare_remount_readonly(struct super_block *);
 56
 57extern void __init mnt_init(void);
 58
 59extern struct lglock vfsmount_lock;
 60
 
 
 61
 62/*
 63 * fs_struct.c
 64 */
 65extern void chroot_fs_refs(struct path *, struct path *);
 66
 67/*
 68 * file_table.c
 69 */
 70extern void file_sb_list_add(struct file *f, struct super_block *sb);
 71extern void file_sb_list_del(struct file *f);
 72extern void mark_files_ro(struct super_block *);
 73extern struct file *get_empty_filp(void);
 74
 75/*
 76 * super.c
 77 */
 78extern int do_remount_sb(struct super_block *, int, void *, int);
 79extern bool grab_super_passive(struct super_block *sb);
 80extern struct dentry *mount_fs(struct file_system_type *,
 81			       int, const char *, void *);
 82extern struct super_block *user_get_super(dev_t);
 83
 84/*
 85 * open.c
 86 */
 87struct nameidata;
 88extern struct file *nameidata_to_filp(struct nameidata *);
 89extern void release_open_intent(struct nameidata *);
 90struct open_flags {
 91	int open_flag;
 92	umode_t mode;
 93	int acc_mode;
 94	int intent;
 
 95};
 96extern struct file *do_filp_open(int dfd, const char *pathname,
 97		const struct open_flags *op, int lookup_flags);
 98extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
 99		const char *, const struct open_flags *, int lookup_flags);
100
101extern long do_handle_open(int mountdirfd,
102			   struct file_handle __user *ufh, int open_flag);
103extern int open_check_o_direct(struct file *f);
 
 
104
105/*
106 * inode.c
107 */
108extern spinlock_t inode_sb_list_lock;
 
 
 
 
 
 
 
 
 
 
 
109
110/*
111 * fs-writeback.c
112 */
113extern void inode_wb_list_del(struct inode *inode);
114
115extern int get_nr_dirty_inodes(void);
116extern void evict_inodes(struct super_block *);
117extern int invalidate_inodes(struct super_block *, bool);
118
119/*
120 * dcache.c
121 */
122extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);