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Merge tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[mirror_ubuntu-zesty-kernel.git] / fs / internal.h
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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
5e6d12b2 12struct super_block;
9d412a43 13struct file_system_type;
ae259a9c 14struct iomap;
befb503c 15struct iomap_ops;
a6f76f23 16struct linux_binprm;
3e93cd67 17struct path;
c7105365 18struct mount;
503c358c 19struct shrink_control;
5e6d12b2 20
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21/*
22 * block_dev.c
23 */
9361401e 24#ifdef CONFIG_BLOCK
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25extern void __init bdev_cache_init(void);
26
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27extern int __sync_blockdev(struct block_device *bdev, int wait);
28
9361401e 29#else
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30static inline void bdev_cache_init(void)
31{
32}
9361401e 33
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34static inline int __sync_blockdev(struct block_device *bdev, int wait)
35{
36 return 0;
37}
9361401e 38#endif
7b0de42d 39
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40/*
41 * buffer.c
42 */
43extern void guard_bio_eod(int rw, struct bio *bio);
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44extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
45 get_block_t *get_block, struct iomap *iomap);
4db96b71 46
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47/*
48 * char_dev.c
49 */
50extern void __init chrdev_init(void);
51
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52/*
53 * namei.c
54 */
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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 *);
0bdaea90 58
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59/*
60 * namespace.c
61 */
b40ef869 62extern void *copy_mount_options(const void __user *);
b8850d1f 63extern char *copy_mount_string(const void __user *);
6d59e7f5 64
0f60f240 65extern struct vfsmount *lookup_mnt(struct path *);
19a167af 66extern int finish_automount(struct vfsmount *, struct path *);
6d59e7f5 67
4ed5e82f 68extern int sb_prepare_remount_readonly(struct super_block *);
f03c6599 69
6d59e7f5 70extern void __init mnt_init(void);
3e93cd67 71
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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 *);
47cd813f 76
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77/*
78 * fs_struct.c
79 */
dcf787f3 80extern void chroot_fs_refs(const struct path *, const struct path *);
864d7c4c 81
82/*
83 * file_table.c
84 */
e81e3f4d 85extern struct file *get_empty_filp(void);
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86
87/*
88 * super.c
89 */
90extern int do_remount_sb(struct super_block *, int, void *, int);
eb6ef3df 91extern bool trylock_super(struct super_block *sb);
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92extern struct dentry *mount_fs(struct file_system_type *,
93 int, const char *, void *);
cf31e70d 94extern struct super_block *user_get_super(dev_t);
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95
96/*
97 * open.c
98 */
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99struct open_flags {
100 int open_flag;
a218d0fd 101 umode_t mode;
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102 int acc_mode;
103 int intent;
f9652e10 104 int lookup_flags;
47c805dc 105};
669abf4e 106extern struct file *do_filp_open(int dfd, struct filename *pathname,
f9652e10 107 const struct open_flags *op);
73d049a4 108extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
f9652e10 109 const char *, const struct open_flags *);
a8dade34 110
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111extern long do_handle_open(int mountdirfd,
112 struct file_handle __user *ufh, int open_flag);
90ad1a8e 113extern int open_check_o_direct(struct file *f);
4bacc9c9 114extern int vfs_open(const struct path *, struct file *, const struct cred *);
9a08c352 115extern struct file *filp_clone_open(struct file *);
becfd1f3 116
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117/*
118 * inode.c
119 */
503c358c 120extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
4eff96dd 121extern void inode_add_lru(struct inode *inode);
f0fce87c 122extern int dentry_needs_remove_privs(struct dentry *dentry);
55fa6091 123
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124/*
125 * fs-writeback.c
126 */
c7f54084 127extern void inode_io_list_del(struct inode *inode);
a66979ab 128
3942c07c 129extern long get_nr_dirty_inodes(void);
a4cdbd8b 130extern void evict_inodes(struct super_block *);
93b270f7 131extern int invalidate_inodes(struct super_block *, bool);
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132
133/*
134 * dcache.c
135 */
136extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
eed81007 137extern int d_set_mounted(struct dentry *dentry);
503c358c 138extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
ba65dc5e 139extern struct dentry *d_alloc_cursor(struct dentry *);
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140
141/*
142 * read_write.c
143 */
68d70d03 144extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
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145
146/*
147 * pipe.c
148 */
149extern const struct file_operations pipefifo_fops;
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150
151/*
152 * fs_pin.c
153 */
fdab684d 154extern void group_pin_kill(struct hlist_head *p);
8fa1f1c2 155extern void mnt_pin_kill(struct mount *m);
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156
157/*
158 * fs/nsfs.c
159 */
160extern struct dentry_operations ns_dentry_operations;
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161
162/*
163 * fs/ioctl.c
164 */
165extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
166 unsigned long arg);
167extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
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168
169/*
170 * iomap support:
171 */
172typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
173 void *data, struct iomap *iomap);
174
175loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
176 unsigned flags, struct iomap_ops *ops, void *data,
177 iomap_actor_t actor);