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(int rw, 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 extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
66 const char *, unsigned int, struct path *);
67 long do_mknodat(int dfd, const char __user *filename, umode_t mode,
68 unsigned int dev);
69 long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
70 long do_rmdir(int dfd, const char __user *pathname);
71 long do_unlinkat(int dfd, struct filename *name);
72 long do_symlinkat(const char __user *oldname, int newdfd,
73 const char __user *newname);
74 int do_linkat(int olddfd, const char __user *oldname, int newdfd,
75 const char __user *newname, int flags);
76
77 /*
78 * namespace.c
79 */
80 extern void *copy_mount_options(const void __user *);
81 extern char *copy_mount_string(const void __user *);
82
83 extern struct vfsmount *lookup_mnt(const struct path *);
84 extern int finish_automount(struct vfsmount *, struct path *);
85
86 extern int sb_prepare_remount_readonly(struct super_block *);
87
88 extern void __init mnt_init(void);
89
90 extern int __mnt_want_write_file(struct file *);
91 extern void __mnt_drop_write_file(struct file *);
92
93 extern void dissolve_on_fput(struct vfsmount *);
94 /*
95 * fs_struct.c
96 */
97 extern void chroot_fs_refs(const struct path *, const struct path *);
98
99 /*
100 * file_table.c
101 */
102 extern struct file *alloc_empty_file(int, const struct cred *);
103 extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
104
105 /*
106 * super.c
107 */
108 extern int reconfigure_super(struct fs_context *);
109 extern bool trylock_super(struct super_block *sb);
110 extern struct super_block *user_get_super(dev_t);
111 extern bool mount_capable(struct fs_context *);
112
113 /*
114 * open.c
115 */
116 struct open_flags {
117 int open_flag;
118 umode_t mode;
119 int acc_mode;
120 int intent;
121 int lookup_flags;
122 };
123 extern struct file *do_filp_open(int dfd, struct filename *pathname,
124 const struct open_flags *op);
125 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
126 const char *, const struct open_flags *);
127
128 long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
129 long do_faccessat(int dfd, const char __user *filename, int mode);
130 int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
131 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
132 int flag);
133
134 extern int vfs_open(const struct path *, struct file *);
135
136 /*
137 * inode.c
138 */
139 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
140 extern void inode_add_lru(struct inode *inode);
141 extern int dentry_needs_remove_privs(struct dentry *dentry);
142
143 /*
144 * fs-writeback.c
145 */
146 extern void inode_io_list_del(struct inode *inode);
147
148 extern long get_nr_dirty_inodes(void);
149 extern int invalidate_inodes(struct super_block *, bool);
150
151 /*
152 * dcache.c
153 */
154 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
155 extern int d_set_mounted(struct dentry *dentry);
156 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
157 extern struct dentry *d_alloc_cursor(struct dentry *);
158 extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
159 extern char *simple_dname(struct dentry *, char *, int);
160 extern void dput_to_list(struct dentry *, struct list_head *);
161 extern void shrink_dentry_list(struct list_head *);
162
163 /*
164 * read_write.c
165 */
166 extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
167
168 /*
169 * pipe.c
170 */
171 extern const struct file_operations pipefifo_fops;
172
173 /*
174 * fs_pin.c
175 */
176 extern void group_pin_kill(struct hlist_head *p);
177 extern void mnt_pin_kill(struct mount *m);
178
179 /*
180 * fs/nsfs.c
181 */
182 extern const struct dentry_operations ns_dentry_operations;
183
184 /*
185 * fs/ioctl.c
186 */
187 extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
188 unsigned long arg);
189
190 /* direct-io.c: */
191 int sb_init_dio_done_wq(struct super_block *sb);
192
