Merge tag 'devicetree-for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-block.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);
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46int __generic_write_end(struct inode *inode, loff_t pos, unsigned copied,
47 struct page *page);
4db96b71 48
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49/*
50 * char_dev.c
51 */
52extern void __init chrdev_init(void);
53
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54/*
55 * namei.c
56 */
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57extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
58extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
59 const char *, unsigned int, struct path *);
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60long do_mknodat(int dfd, const char __user *filename, umode_t mode,
61 unsigned int dev);
0101db7a 62long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
f459dffa 63long do_rmdir(int dfd, const char __user *pathname);
da2f1362 64long do_unlinkat(int dfd, struct filename *name);
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65long do_symlinkat(const char __user *oldname, int newdfd,
66 const char __user *newname);
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67int do_linkat(int olddfd, const char __user *oldname, int newdfd,
68 const char __user *newname, int flags);
0bdaea90 69
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70/*
71 * namespace.c
72 */
b40ef869 73extern void *copy_mount_options(const void __user *);
b8850d1f 74extern char *copy_mount_string(const void __user *);
6d59e7f5 75
ca71cf71 76extern struct vfsmount *lookup_mnt(const struct path *);
19a167af 77extern int finish_automount(struct vfsmount *, struct path *);
6d59e7f5 78
4ed5e82f 79extern int sb_prepare_remount_readonly(struct super_block *);
f03c6599 80
6d59e7f5 81extern void __init mnt_init(void);
3e93cd67 82
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83extern int __mnt_want_write(struct vfsmount *);
84extern int __mnt_want_write_file(struct file *);
7c6893e3 85extern int mnt_want_write_file_path(struct file *);
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86extern void __mnt_drop_write(struct vfsmount *);
87extern void __mnt_drop_write_file(struct file *);
7c6893e3 88extern void mnt_drop_write_file_path(struct file *);
47cd813f 89
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90/*
91 * fs_struct.c
92 */
dcf787f3 93extern void chroot_fs_refs(const struct path *, const struct path *);
864d7c4c 94
95/*
96 * file_table.c
97 */
ea73ea72 98extern struct file *alloc_empty_file(int, const struct cred *);
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99
100/*
101 * super.c
102 */
103extern int do_remount_sb(struct super_block *, int, void *, int);
eb6ef3df 104extern bool trylock_super(struct super_block *sb);
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105extern struct dentry *mount_fs(struct file_system_type *,
106 int, const char *, void *);
cf31e70d 107extern struct super_block *user_get_super(dev_t);
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108
109/*
110 * open.c
111 */
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112struct open_flags {
113 int open_flag;
a218d0fd 114 umode_t mode;
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115 int acc_mode;
116 int intent;
f9652e10 117 int lookup_flags;
47c805dc 118};
669abf4e 119extern struct file *do_filp_open(int dfd, struct filename *pathname,
f9652e10 120 const struct open_flags *op);
73d049a4 121extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
f9652e10 122 const char *, const struct open_flags *);
a8dade34 123
411d9475 124long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
cbfe20f5 125long do_faccessat(int dfd, const char __user *filename, int mode);
03450e27 126int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
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127int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
128 int flag);
03450e27 129
ae2bb293 130extern int vfs_open(const struct path *, struct file *);
becfd1f3 131
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132/*
133 * inode.c
134 */
503c358c 135extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
4eff96dd 136extern void inode_add_lru(struct inode *inode);
f0fce87c 137extern int dentry_needs_remove_privs(struct dentry *dentry);
55fa6091 138
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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
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146/*
147 * fs-writeback.c
148 */
c7f54084 149extern void inode_io_list_del(struct inode *inode);
a66979ab 150
3942c07c 151extern long get_nr_dirty_inodes(void);
93b270f7 152extern int invalidate_inodes(struct super_block *, bool);
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153
154/*
155 * dcache.c
156 */
157extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
eed81007 158extern int d_set_mounted(struct dentry *dentry);
503c358c 159extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
ba65dc5e 160extern struct dentry *d_alloc_cursor(struct dentry *);
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161
162/*
163 * read_write.c
164 */
68d70d03 165extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
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166
167/*
168 * pipe.c
169 */
170extern const struct file_operations pipefifo_fops;
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171
172/*
173 * fs_pin.c
174 */
fdab684d 175extern void group_pin_kill(struct hlist_head *p);
8fa1f1c2 176extern void mnt_pin_kill(struct mount *m);
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177
178/*
179 * fs/nsfs.c
180 */
be218aa2 181extern const struct dentry_operations ns_dentry_operations;
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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);
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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,
8ff6daa1 197 unsigned flags, const struct iomap_ops *ops, void *data,
befb503c 198 iomap_actor_t actor);
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199
200/* direct-io.c: */
201int sb_init_dio_done_wq(struct super_block *sb);