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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
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/* SPDX-License-Identifier: GPL-2.0-or-later */
2/* fs/ internal definitions
3 *
4 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8struct super_block;
9struct file_system_type;
10struct iomap;
11struct iomap_ops;
12struct linux_binprm;
13struct path;
14struct mount;
15struct shrink_control;
16struct fs_context;
17struct user_namespace;
18struct pipe_inode_info;
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);
27void iterate_bdevs(void (*)(struct block_device *, void *), void *);
28void emergency_thaw_bdev(struct super_block *sb);
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}
38static inline void iterate_bdevs(void (*f)(struct block_device *, void *),
39 void *arg)
40{
41}
42static inline int emergency_thaw_bdev(struct super_block *sb)
43{
44 return 0;
45}
46#endif /* CONFIG_BLOCK */
47
48/*
49 * buffer.c
50 */
51extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
52 get_block_t *get_block, struct iomap *iomap);
53
54/*
55 * char_dev.c
56 */
57extern void __init chrdev_init(void);
58
59/*
60 * fs_context.c
61 */
62extern const struct fs_context_operations legacy_fs_context_ops;
63extern int parse_monolithic_mount_data(struct fs_context *, void *);
64extern void vfs_clean_context(struct fs_context *fc);
65extern int finish_clean_context(struct fs_context *fc);
66
67/*
68 * namei.c
69 */
70extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
71 struct path *path, struct path *root);
72extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
73 const char *, unsigned int, struct path *);
74long do_rmdir(int dfd, struct filename *name);
75long do_unlinkat(int dfd, struct filename *name);
76int may_linkat(struct user_namespace *mnt_userns, struct path *link);
77int do_renameat2(int olddfd, struct filename *oldname, int newdfd,
78 struct filename *newname, unsigned int flags);
79
80/*
81 * namespace.c
82 */
83extern struct vfsmount *lookup_mnt(const struct path *);
84extern int finish_automount(struct vfsmount *, struct path *);
85
86extern int sb_prepare_remount_readonly(struct super_block *);
87
88extern void __init mnt_init(void);
89
90extern int __mnt_want_write_file(struct file *);
91extern void __mnt_drop_write_file(struct file *);
92
93extern void dissolve_on_fput(struct vfsmount *);
94
95int path_mount(const char *dev_name, struct path *path,
96 const char *type_page, unsigned long flags, void *data_page);
97int path_umount(struct path *path, int flags);
98
99/*
100 * fs_struct.c
101 */
102extern void chroot_fs_refs(const struct path *, const struct path *);
103
104/*
105 * file_table.c
106 */
107extern struct file *alloc_empty_file(int, const struct cred *);
108extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
109
110/*
111 * super.c
112 */
113extern int reconfigure_super(struct fs_context *);
114extern bool trylock_super(struct super_block *sb);
115struct super_block *user_get_super(dev_t, bool excl);
116void put_super(struct super_block *sb);
117extern bool mount_capable(struct fs_context *);
118
119/*
120 * open.c
121 */
122struct open_flags {
123 int open_flag;
124 umode_t mode;
125 int acc_mode;
126 int intent;
127 int lookup_flags;
128};
129extern struct file *do_filp_open(int dfd, struct filename *pathname,
130 const struct open_flags *op);
131extern struct file *do_file_open_root(const struct path *,
132 const char *, const struct open_flags *);
133extern struct open_how build_open_how(int flags, umode_t mode);
134extern int build_open_flags(const struct open_how *how, struct open_flags *op);
135extern int __close_fd_get_file(unsigned int fd, struct file **res);
136
137long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
138int chmod_common(const struct path *path, umode_t mode);
139int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
140 int flag);
141int chown_common(const struct path *path, uid_t user, gid_t group);
142extern int vfs_open(const struct path *, struct file *);
143
144/*
145 * inode.c
146 */
147extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
148extern void inode_add_lru(struct inode *inode);
149extern int dentry_needs_remove_privs(struct dentry *dentry);
150
151/*
152 * fs-writeback.c
153 */
154extern long get_nr_dirty_inodes(void);
155extern int invalidate_inodes(struct super_block *, bool);
156
157/*
158 * dcache.c
159 */
160extern int d_set_mounted(struct dentry *dentry);
161extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
162extern struct dentry *d_alloc_cursor(struct dentry *);
163extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
164extern char *simple_dname(struct dentry *, char *, int);
165extern void dput_to_list(struct dentry *, struct list_head *);
166extern void shrink_dentry_list(struct list_head *);
167
168/*
169 * read_write.c
170 */
171extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
172
173/*
174 * pipe.c
175 */
176extern const struct file_operations pipefifo_fops;
177
178/*
179 * fs_pin.c
180 */
181extern void group_pin_kill(struct hlist_head *p);
182extern void mnt_pin_kill(struct mount *m);
183
184/*
185 * fs/nsfs.c
186 */
187extern const struct dentry_operations ns_dentry_operations;
188
189/* direct-io.c: */
190int sb_init_dio_done_wq(struct super_block *sb);
191
192/*
193 * fs/stat.c:
194 */
195int do_statx(int dfd, const char __user *filename, unsigned flags,
196 unsigned int mask, struct statx __user *buffer);
197
198/*
199 * fs/splice.c:
200 */
201long splice_file_to_pipe(struct file *in,
202 struct pipe_inode_info *opipe,
203 loff_t *offset,
204 size_t len, unsigned int flags);