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;
 18
 19/*
 20 * block_dev.c
 21 */
 22#ifdef CONFIG_BLOCK
 23extern void __init bdev_cache_init(void);
 24
 25extern int __sync_blockdev(struct block_device *bdev, int wait);
 26void iterate_bdevs(void (*)(struct block_device *, void *), void *);
 27void emergency_thaw_bdev(struct super_block *sb);
 28void bd_forget(struct inode *inode);
 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}
 46static inline void bd_forget(struct inode *inode)
 47{
 48}
 49#endif /* CONFIG_BLOCK */
 50
 51/*
 52 * buffer.c
 53 */
 
 54extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
 55		get_block_t *get_block, struct iomap *iomap);
 56
 57/*
 58 * char_dev.c
 59 */
 60extern void __init chrdev_init(void);
 61
 62/*
 63 * fs_context.c
 64 */
 65extern const struct fs_context_operations legacy_fs_context_ops;
 66extern int parse_monolithic_mount_data(struct fs_context *, void *);
 67extern void fc_drop_locked(struct fs_context *);
 68extern void vfs_clean_context(struct fs_context *fc);
 69extern int finish_clean_context(struct fs_context *fc);
 70
 71/*
 72 * namei.c
 73 */
 74extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
 75			   struct path *path, struct path *root);
 76extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
 77			   const char *, unsigned int, struct path *);
 78long do_rmdir(int dfd, struct filename *name);
 79long do_unlinkat(int dfd, struct filename *name);
 80int may_linkat(struct path *link);
 81
 82/*
 83 * namespace.c
 84 */
 85extern void *copy_mount_options(const void __user *);
 86extern char *copy_mount_string(const void __user *);
 87
 88extern struct vfsmount *lookup_mnt(const struct path *);
 89extern int finish_automount(struct vfsmount *, struct path *);
 90
 91extern int sb_prepare_remount_readonly(struct super_block *);
 92
 93extern void __init mnt_init(void);
 94
 
 95extern int __mnt_want_write_file(struct file *);
 
 96extern void __mnt_drop_write_file(struct file *);
 97
 98extern void dissolve_on_fput(struct vfsmount *);
 99
100int path_mount(const char *dev_name, struct path *path,
101		const char *type_page, unsigned long flags, void *data_page);
102int path_umount(struct path *path, int flags);
103
104/*
105 * fs_struct.c
106 */
107extern void chroot_fs_refs(const struct path *, const struct path *);
108
109/*
110 * file_table.c
111 */
112extern struct file *alloc_empty_file(int, const struct cred *);
113extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
114
115/*
116 * super.c
117 */
118extern int reconfigure_super(struct fs_context *);
119extern bool trylock_super(struct super_block *sb);
 
 
120extern struct super_block *user_get_super(dev_t);
121extern bool mount_capable(struct fs_context *);
122
123/*
124 * open.c
125 */
126struct open_flags {
127	int open_flag;
128	umode_t mode;
129	int acc_mode;
130	int intent;
131	int lookup_flags;
132};
133extern struct file *do_filp_open(int dfd, struct filename *pathname,
134		const struct open_flags *op);
135extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
136		const char *, const struct open_flags *);
137extern struct open_how build_open_how(int flags, umode_t mode);
138extern int build_open_flags(const struct open_how *how, struct open_flags *op);
139
140long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
141int chmod_common(const struct path *path, umode_t mode);
142int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
143		int flag);
144int chown_common(const struct path *path, uid_t user, gid_t group);
145extern int vfs_open(const struct path *, struct file *);
146
147/*
148 * inode.c
149 */
150extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
151extern void inode_add_lru(struct inode *inode);
152extern int dentry_needs_remove_privs(struct dentry *dentry);
153
 
 
 
 
 
 
 
 
 
154/*
155 * fs-writeback.c
156 */
 
 
157extern long get_nr_dirty_inodes(void);
 
158extern int invalidate_inodes(struct super_block *, bool);
159
160/*
161 * dcache.c
162 */
 
163extern int d_set_mounted(struct dentry *dentry);
164extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
165extern struct dentry *d_alloc_cursor(struct dentry *);
166extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
167extern char *simple_dname(struct dentry *, char *, int);
168extern void dput_to_list(struct dentry *, struct list_head *);
169extern void shrink_dentry_list(struct list_head *);
170
171/*
172 * read_write.c
173 */
174extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
175
176/*
177 * pipe.c
178 */
179extern const struct file_operations pipefifo_fops;
180
181/*
182 * fs_pin.c
183 */
184extern void group_pin_kill(struct hlist_head *p);
185extern void mnt_pin_kill(struct mount *m);
186
187/*
188 * fs/nsfs.c
189 */
190extern const struct dentry_operations ns_dentry_operations;
191
192/* direct-io.c: */
193int sb_init_dio_done_wq(struct super_block *sb);
 
 
 
 
194
195/*
196 * fs/stat.c:
197 */
198int do_statx(int dfd, const char __user *filename, unsigned flags,
199	     unsigned int mask, struct statx __user *buffer);