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
8 struct super_block;
9 struct file_system_type;
10 struct iomap;
11 struct iomap_ops;
12 struct linux_binprm;
13 struct path;
14 struct mount;
15 struct shrink_control;
16 struct fs_context;
17 struct user_namespace;
18
19 /*
20 * block_dev.c
21 */
22 #ifdef CONFIG_BLOCK
23 extern void __init bdev_cache_init(void);
24
25 extern int __sync_blockdev(struct block_device *bdev, int wait);
26
27 #else
bdev_cache_init(void)28 static inline void bdev_cache_init(void)
29 {
30 }
31
__sync_blockdev(struct block_device * bdev,int wait)32 static inline int __sync_blockdev(struct block_device *bdev, int wait)
33 {
34 return 0;
35 }
36 #endif
37
38 /*
39 * buffer.c
40 */
41 extern void guard_bio_eod(struct bio *bio);
42 extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
43 get_block_t *get_block, struct iomap *iomap);
44
45 /*
46 * char_dev.c
47 */
48 extern void __init chrdev_init(void);
49
50 /*
51 * fs_context.c
52 */
53 extern const struct fs_context_operations legacy_fs_context_ops;
54 extern int parse_monolithic_mount_data(struct fs_context *, void *);
55 extern void fc_drop_locked(struct fs_context *);
56 extern void vfs_clean_context(struct fs_context *fc);
57 extern int finish_clean_context(struct fs_context *fc);
58
59 /*
60 * namei.c
61 */
62 extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
63 struct path *path, struct path *root);
64 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
65 long do_mknodat(int dfd, const char __user *filename, umode_t mode,
66 unsigned int dev);
67 long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
68 long do_rmdir(int dfd, const char __user *pathname);
69 long do_unlinkat(int dfd, struct filename *name);
70 long do_symlinkat(const char __user *oldname, int newdfd,
71 const char __user *newname);
72 int do_linkat(int olddfd, const char __user *oldname, int newdfd,
73 const char __user *newname, int flags);
74
75 /*
76 * namespace.c
77 */
78 extern void *copy_mount_options(const void __user *);
79 extern char *copy_mount_string(const void __user *);
80
81 extern struct vfsmount *lookup_mnt(const struct path *);
82 extern int finish_automount(struct vfsmount *, struct path *);
83
84 extern int sb_prepare_remount_readonly(struct super_block *);
85
86 extern void __init mnt_init(void);
87
88 extern int __mnt_want_write_file(struct file *);
89 extern void __mnt_drop_write_file(struct file *);
90
91 extern void dissolve_on_fput(struct vfsmount *);
92 /*
93 * fs_struct.c
94 */
95 extern void chroot_fs_refs(const struct path *, const struct path *);
96
97 /*
98 * file_table.c
99 */
100 extern struct file *alloc_empty_file(int, const struct cred *);
101 extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
102
103 /*
104 * super.c
105 */
106 extern int reconfigure_super(struct fs_context *);
107 extern bool trylock_super(struct super_block *sb);
108 extern struct super_block *user_get_super(dev_t);
109 extern bool mount_capable(struct fs_context *);
110
111 /*
112 * open.c
113 */
114 struct open_flags {
115 int open_flag;
116 umode_t mode;
117 int acc_mode;
118 int intent;
119 int lookup_flags;
120 };
121 extern struct file *do_filp_open(int dfd, struct filename *pathname,
122 const struct open_flags *op);
123 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
124 const char *, const struct open_flags *);
125
126 long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
127 long do_faccessat(int dfd, const char __user *filename, int mode);
128 int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
129 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
130 int flag);
131
132 extern int vfs_open(const struct path *, struct file *);
133
134 /*
135 * inode.c
136 */
137 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
138 extern void inode_add_lru(struct inode *inode);
139 extern int dentry_needs_remove_privs(struct dentry *dentry);
140
141 /*
142 * fs-writeback.c
143 */
144 extern void inode_io_list_del(struct inode *inode);
145
146 extern long get_nr_dirty_inodes(void);
147 extern int invalidate_inodes(struct super_block *, bool);
148
149 /*
150 * dcache.c
151 */
152 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
153 extern int d_set_mounted(struct dentry *dentry);
154 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
155 extern struct dentry *d_alloc_cursor(struct dentry *);
156 extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
157 extern char *simple_dname(struct dentry *, char *, int);
158 extern void dput_to_list(struct dentry *, struct list_head *);
159 extern void shrink_dentry_list(struct list_head *);
160
161 /*
162 * read_write.c
163 */
164 extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
165
166 /*
167 * pipe.c
168 */
169 extern const struct file_operations pipefifo_fops;
170
171 /*
172 * fs_pin.c
173 */
174 extern void group_pin_kill(struct hlist_head *p);
175 extern void mnt_pin_kill(struct mount *m);
176
177 /*
178 * fs/nsfs.c
179 */
180 extern const struct dentry_operations ns_dentry_operations;
181
182 /*
183 * fs/ioctl.c
184 */
185 extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
186 unsigned long arg);
187
188 /* direct-io.c: */
189 int sb_init_dio_done_wq(struct super_block *sb);
190