/* SPDX-License-Identifier: GPL-2.0-or-later *//* fs/ internal definitions * * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) */ struct super_block;struct file_system_type;struct iomap;struct iomap_ops;struct linux_binprm;struct path;struct mount;struct shrink_control;struct fs_context;struct user_namespace; /* * block_dev.c */#ifdef CONFIG_BLOCKextern void __init bdev_cache_init(void); extern int __sync_blockdev(struct block_device *bdev, int wait);void iterate_bdevs(void (*)(struct block_device *, void *), void *);void emergency_thaw_bdev(struct super_block *sb);void bd_forget(struct inode *inode);#elsestatic inline void bdev_cache_init(void){} static inline int __sync_blockdev(struct block_device *bdev, int wait){	return 0;}static inline void iterate_bdevs(void (*f)(struct block_device *, void *),		void *arg){}static inline int emergency_thaw_bdev(struct super_block *sb){	return 0;}static inline void bd_forget(struct inode *inode){}#endif /* CONFIG_BLOCK */ /* * buffer.c */extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,		get_block_t *get_block, struct iomap *iomap); /* * char_dev.c */extern void __init chrdev_init(void); /* * fs_context.c */extern const struct fs_context_operations legacy_fs_context_ops;extern int parse_monolithic_mount_data(struct fs_context *, void *);extern void fc_drop_locked(struct fs_context *);extern void vfs_clean_context(struct fs_context *fc);extern int finish_clean_context(struct fs_context *fc); /* * namei.c */extern int filename_lookup(int dfd, struct filename *name, unsigned flags,			   struct path *path, struct path *root);extern int vfs_path_lookup(struct dentry *, struct vfsmount *,			   const char *, unsigned int, struct path *);long do_rmdir(int dfd, struct filename *name);long do_unlinkat(int dfd, struct filename *name);int may_linkat(struct path *link); /* * namespace.c */extern void *copy_mount_options(const void __user *);extern char *copy_mount_string(const void __user *); extern struct vfsmount *lookup_mnt(const struct path *);extern int finish_automount(struct vfsmount *, struct path *); extern int sb_prepare_remount_readonly(struct super_block *); extern void __init mnt_init(void); extern int __mnt_want_write_file(struct file *);extern void __mnt_drop_write_file(struct file *); extern void dissolve_on_fput(struct vfsmount *); int path_mount(const char *dev_name, struct path *path,		const char *type_page, unsigned long flags, void *data_page);int path_umount(struct path *path, int flags); /* * fs_struct.c */extern void chroot_fs_refs(const struct path *, const struct path *); /* * file_table.c */extern struct file *alloc_empty_file(int, const struct cred *);extern struct file *alloc_empty_file_noaccount(int, const struct cred *); /* * super.c */extern int reconfigure_super(struct fs_context *);extern bool trylock_super(struct super_block *sb);extern struct super_block *user_get_super(dev_t);extern bool mount_capable(struct fs_context *); /* * open.c */struct open_flags {	int open_flag;	umode_t mode;	int acc_mode;	int intent;	int lookup_flags;};extern struct file *do_filp_open(int dfd, struct filename *pathname,		const struct open_flags *op);extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,		const char *, const struct open_flags *);extern struct open_how build_open_how(int flags, umode_t mode);extern int build_open_flags(const struct open_how *how, struct open_flags *op); long do_sys_ftruncate(unsigned int fd, loff_t length, int small);int chmod_common(const struct path *path, umode_t mode);int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,		int flag);int chown_common(const struct path *path, uid_t user, gid_t group);extern int vfs_open(const struct path *, struct file *); /* * inode.c */extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);extern void inode_add_lru(struct inode *inode);extern int dentry_needs_remove_privs(struct dentry *dentry); /* * fs-writeback.c */extern long get_nr_dirty_inodes(void);extern int invalidate_inodes(struct super_block *, bool); /* * dcache.c */extern int d_set_mounted(struct dentry *dentry);extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);extern struct dentry *d_alloc_cursor(struct dentry *);extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);extern char *simple_dname(struct dentry *, char *, int);extern void dput_to_list(struct dentry *, struct list_head *);extern void shrink_dentry_list(struct list_head *); /* * read_write.c */extern int rw_verify_area(int, struct file *, const loff_t *, size_t); /* * pipe.c */extern const struct file_operations pipefifo_fops; /* * fs_pin.c */extern void group_pin_kill(struct hlist_head *p);extern void mnt_pin_kill(struct mount *m); /* * fs/nsfs.c */extern const struct dentry_operations ns_dentry_operations; /* direct-io.c: */int sb_init_dio_done_wq(struct super_block *sb); /* * fs/stat.c: */int do_statx(int dfd, const char __user *filename, unsigned flags,	     unsigned int mask, struct statx __user *buffer);