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
 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 *);
 58long do_mknodat(int dfd, const char __user *filename, umode_t mode,
 59		unsigned int dev);
 60long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
 61long do_rmdir(int dfd, const char __user *pathname);
 62long do_unlinkat(int dfd, struct filename *name);
 63long do_symlinkat(const char __user *oldname, int newdfd,
 64		  const char __user *newname);
 65int do_linkat(int olddfd, const char __user *oldname, int newdfd,
 66	      const char __user *newname, int flags);
 67
 68/*
 69 * namespace.c
 70 */
 71extern void *copy_mount_options(const void __user *);
 72extern char *copy_mount_string(const void __user *);
 73
 74extern struct vfsmount *lookup_mnt(const struct path *);
 75extern int finish_automount(struct vfsmount *, struct path *);
 76
 77extern int sb_prepare_remount_readonly(struct super_block *);
 78
 79extern void __init mnt_init(void);
 80
 81extern int __mnt_want_write(struct vfsmount *);
 82extern int __mnt_want_write_file(struct file *);
 83extern int mnt_want_write_file_path(struct file *);
 84extern void __mnt_drop_write(struct vfsmount *);
 85extern void __mnt_drop_write_file(struct file *);
 86extern void mnt_drop_write_file_path(struct file *);
 87
 88/*
 89 * fs_struct.c
 90 */
 91extern void chroot_fs_refs(const struct path *, const struct path *);
 92
 93/*
 94 * file_table.c
 95 */
 96extern struct file *get_empty_filp(void);
 97
 98/*
 99 * super.c
100 */
101extern int do_remount_sb(struct super_block *, int, void *, int);
102extern bool trylock_super(struct super_block *sb);
103extern struct dentry *mount_fs(struct file_system_type *,
104			       int, const char *, void *);
105extern struct super_block *user_get_super(dev_t);
106
107/*
108 * open.c
109 */
110struct open_flags {
111	int open_flag;
112	umode_t mode;
113	int acc_mode;
114	int intent;
115	int lookup_flags;
116};
117extern struct file *do_filp_open(int dfd, struct filename *pathname,
118		const struct open_flags *op);
119extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
120		const char *, const struct open_flags *);
121
122long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
123long do_faccessat(int dfd, const char __user *filename, int mode);
124int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
125int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
126		int flag);
127
128extern int open_check_o_direct(struct file *f);
129extern int vfs_open(const struct path *, struct file *, const struct cred *);
130extern struct file *filp_clone_open(struct file *);
131
132/*
133 * inode.c
134 */
135extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
136extern void inode_add_lru(struct inode *inode);
137extern int dentry_needs_remove_privs(struct dentry *dentry);
138
139extern bool __atime_needs_update(const struct path *, struct inode *, bool);
140static inline bool atime_needs_update_rcu(const struct path *path,
141					  struct inode *inode)
142{
143	return __atime_needs_update(path, inode, true);
144}
145
 
 
146/*
147 * fs-writeback.c
148 */
149extern void inode_io_list_del(struct inode *inode);
150
151extern long get_nr_dirty_inodes(void);
 
152extern int invalidate_inodes(struct super_block *, bool);
153
154/*
155 * dcache.c
156 */
157extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
158extern int d_set_mounted(struct dentry *dentry);
159extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
160extern struct dentry *d_alloc_cursor(struct dentry *);
161
162/*
163 * read_write.c
164 */
165extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
166
167/*
168 * pipe.c
169 */
170extern const struct file_operations pipefifo_fops;
171
172/*
173 * fs_pin.c
174 */
175extern void group_pin_kill(struct hlist_head *p);
176extern void mnt_pin_kill(struct mount *m);
177
178/*
179 * fs/nsfs.c
180 */
181extern const struct dentry_operations ns_dentry_operations;
182
183/*
184 * fs/ioctl.c
185 */
186extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
187		    unsigned long arg);
188extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
189
190/*
191 * iomap support:
192 */
193typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
194		void *data, struct iomap *iomap);
195
196loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
197		unsigned flags, const struct iomap_ops *ops, void *data,
198		iomap_actor_t actor);
199
200/* direct-io.c: */
201int sb_init_dio_done_wq(struct super_block *sb);