blob: 11c6d89dce9c9ae2e1bc1d04614a732ccc0a952e [file] [log] [blame]
David Howells07f3f05c2006-09-30 20:52:18 +02001/* 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
Andrew Morton5e6d12b2006-08-31 12:55:23 +020012struct super_block;
Al Viro9d412a42011-03-17 22:08:28 -040013struct file_system_type;
Christoph Hellwigae259a92016-06-21 09:23:11 +100014struct iomap;
Christoph Hellwigbefb5032016-09-19 11:24:49 +100015struct iomap_ops;
David Howellsa6f76f22008-11-14 10:39:24 +110016struct linux_binprm;
Al Viro3e93cd62009-03-29 19:00:13 -040017struct path;
Al Viroc7105362011-11-24 18:22:03 -050018struct mount;
Vladimir Davydov503c3582015-02-12 14:58:47 -080019struct shrink_control;
Andrew Morton5e6d12b2006-08-31 12:55:23 +020020
David Howells07f3f05c2006-09-30 20:52:18 +020021/*
22 * block_dev.c
23 */
David Howells93614012006-09-30 20:45:40 +020024#ifdef CONFIG_BLOCK
David Howells07f3f05c2006-09-30 20:52:18 +020025extern void __init bdev_cache_init(void);
26
Jan Kara5cee5812009-04-27 16:43:51 +020027extern int __sync_blockdev(struct block_device *bdev, int wait);
28
Andrew Morton5e6d12b2006-08-31 12:55:23 +020029#else
30static inline void bdev_cache_init(void)
31{
32}
33
Jan Kara5cee5812009-04-27 16:43:51 +020034static inline int __sync_blockdev(struct block_device *bdev, int wait)
35{
36 return 0;
37}
David Howells93614012006-09-30 20:45:40 +020038#endif
David Howells7b0de422006-08-29 19:06:07 +010039
David Howells07f3f05c2006-09-30 20:52:18 +020040/*
Akinobu Mita4db96b72014-10-09 15:26:55 -070041 * buffer.c
42 */
43extern void guard_bio_eod(int rw, struct bio *bio);
Christoph Hellwigae259a92016-06-21 09:23:11 +100044extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
45 get_block_t *get_block, struct iomap *iomap);
Akinobu Mita4db96b72014-10-09 15:26:55 -070046
47/*
David Howells07f3f05c2006-09-30 20:52:18 +020048 * char_dev.c
49 */
50extern void __init chrdev_init(void);
51
52/*
David Howells0bdaea92012-06-25 12:55:46 +010053 * namei.c
54 */
Al Viro197df042013-09-08 14:03:27 -040055extern 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 *);
David Howells0bdaea92012-06-25 12:55:46 +010058
59/*
David Howells07f3f05c2006-09-30 20:52:18 +020060 * namespace.c
61 */
Al Virob40ef862015-12-14 18:44:44 -050062extern void *copy_mount_options(const void __user *);
Tim Gardnerb8850d12014-08-28 11:26:03 -060063extern char *copy_mount_string(const void __user *);
Al Viro6d59e7f2008-03-22 15:48:17 -040064
Al Viroca71cf72016-11-20 19:45:28 -050065extern struct vfsmount *lookup_mnt(const struct path *);
Al Viro19a167a2011-01-17 01:35:23 -050066extern int finish_automount(struct vfsmount *, struct path *);
Al Viro6d59e7f2008-03-22 15:48:17 -040067
Miklos Szeredi4ed5e822011-11-21 12:11:31 +010068extern int sb_prepare_remount_readonly(struct super_block *);
Al Virof03c6592011-01-14 22:30:21 -050069
Al Viro6d59e7f2008-03-22 15:48:17 -040070extern void __init mnt_init(void);
Al Viro3e93cd62009-03-29 19:00:13 -040071
Jan Karaeb04c282012-06-12 16:20:35 +020072extern 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 *);
Al Viro47cd8132010-02-05 02:01:14 -050076
Al Viro3e93cd62009-03-29 19:00:13 -040077/*
78 * fs_struct.c
79 */
Al Virodcf787f2013-03-01 23:51:07 -050080extern void chroot_fs_refs(const struct path *, const struct path *);
npiggin@suse.de864d7c42009-04-26 20:25:56 +100081
82/*
83 * file_table.c
84 */
Eric Parise81e3f42009-12-04 15:47:36 -050085extern struct file *get_empty_filp(void);
Al Viro62c69432009-05-07 03:12:29 -040086
87/*
88 * super.c
89 */
90extern int do_remount_sb(struct super_block *, int, void *, int);
Konstantin Khlebnikoveb6ef3d2015-02-19 20:19:35 +030091extern bool trylock_super(struct super_block *sb);
Al Viro9d412a42011-03-17 22:08:28 -040092extern struct dentry *mount_fs(struct file_system_type *,
93 int, const char *, void *);
Al Virocf31e702012-01-02 22:28:36 -050094extern struct super_block *user_get_super(dev_t);
Al Viro482928d2009-12-19 10:10:39 -050095
96/*
97 * open.c
98 */
Al Viro47c805d2011-02-23 17:44:09 -050099struct open_flags {
100 int open_flag;
Al Viroa218d0f2011-11-21 14:59:34 -0500101 umode_t mode;
Al Viro47c805d2011-02-23 17:44:09 -0500102 int acc_mode;
103 int intent;
Al Virof9652e12013-06-11 08:23:01 +0400104 int lookup_flags;
Al Viro47c805d2011-02-23 17:44:09 -0500105};
Jeff Layton669abf42012-10-10 16:43:10 -0400106extern struct file *do_filp_open(int dfd, struct filename *pathname,
Al Virof9652e12013-06-11 08:23:01 +0400107 const struct open_flags *op);
Al Viro73d049a2011-03-11 12:08:24 -0500108extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
Al Virof9652e12013-06-11 08:23:01 +0400109 const char *, const struct open_flags *);
Al Viroa8dade32010-10-24 11:13:10 -0400110
Aneesh Kumar K.Vbecfd1f2011-01-29 18:43:26 +0530111extern long do_handle_open(int mountdirfd,
112 struct file_handle __user *ufh, int open_flag);
Miklos Szeredi90ad1a82012-05-21 17:30:15 +0200113extern int open_check_o_direct(struct file *f);
David Howells4bacc9c2015-06-18 14:32:31 +0100114extern int vfs_open(const struct path *, struct file *, const struct cred *);
James Bottomley9a08c352016-02-17 16:49:38 -0800115extern struct file *filp_clone_open(struct file *);
Aneesh Kumar K.Vbecfd1f2011-01-29 18:43:26 +0530116
Al Viroa8dade32010-10-24 11:13:10 -0400117/*
118 * inode.c
119 */
Vladimir Davydov503c3582015-02-12 14:58:47 -0800120extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
Jan Kara4eff96d2012-11-26 16:29:51 -0800121extern void inode_add_lru(struct inode *inode);
Miklos Szeredif0fce872016-08-03 13:44:27 +0200122extern int dentry_needs_remove_privs(struct dentry *dentry);
Dave Chinner55fa6092011-03-22 22:23:40 +1100123
Miklos Szeredi598e3c82016-09-16 12:44:20 +0200124extern 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
Dave Chinnera66979a2011-03-22 22:23:41 +1100133/*
134 * fs-writeback.c
135 */
Dave Chinnerc7f54082015-03-04 14:07:22 -0500136extern void inode_io_list_del(struct inode *inode);
Dave Chinnera66979a2011-03-22 22:23:41 +1100137
Glauber Costa3942c072013-08-28 10:17:53 +1000138extern long get_nr_dirty_inodes(void);
Al Viroa4cdbd82010-10-29 05:49:13 -0400139extern void evict_inodes(struct super_block *);
NeilBrown93b270f2011-02-24 17:25:47 +1100140extern int invalidate_inodes(struct super_block *, bool);
Al Viroa4464db2011-07-07 15:03:58 -0400141
142/*
143 * dcache.c
144 */
145extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
Miklos Szeredieed81002013-09-05 14:39:11 +0200146extern int d_set_mounted(struct dentry *dentry);
Vladimir Davydov503c3582015-02-12 14:58:47 -0800147extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
Al Viroba65dc52016-06-10 11:32:47 -0400148extern struct dentry *d_alloc_cursor(struct dentry *);
Al Viro06ae43f2013-03-20 13:19:30 -0400149
150/*
151 * read_write.c
152 */
Al Viro68d70d02013-06-19 15:26:04 +0400153extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
Al Viro599a0ac2013-03-12 09:58:10 -0400154
155/*
156 * pipe.c
157 */
158extern const struct file_operations pipefifo_fops;
Al Viro8fa1f1c2014-05-21 18:22:52 -0400159
160/*
161 * fs_pin.c
162 */
Al Virofdab6842015-01-11 10:57:27 -0500163extern void group_pin_kill(struct hlist_head *p);
Al Viro8fa1f1c2014-05-21 18:22:52 -0400164extern void mnt_pin_kill(struct mount *m);
Al Viroe149ed22014-11-01 10:57:28 -0400165
166/*
167 * fs/nsfs.c
168 */
Rasmus Villemoesbe218aa2016-09-15 00:15:34 +0200169extern const struct dentry_operations ns_dentry_operations;
Al Viro66cf1912016-01-07 09:53:30 -0500170
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);
Christoph Hellwigbefb5032016-09-19 11:24:49 +1000177
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,
Christoph Hellwig8ff6daa2017-01-27 23:20:26 -0800185 unsigned flags, const struct iomap_ops *ops, void *data,
Christoph Hellwigbefb5032016-09-19 11:24:49 +1000186 iomap_actor_t actor);
Christoph Hellwigec1b8262016-11-30 14:33:53 +1100187
188/* direct-io.c: */
189int sb_init_dio_done_wq(struct super_block *sb);