/* fs/ internal definitions * * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <linux/lglock.h> struct super_block; struct file_system_type; struct linux_binprm; struct path; struct mount; /* * block_dev.c */ #ifdef CONFIG_BLOCK extern void __init bdev_cache_init(void); extern int __sync_blockdev(struct block_device *bdev, int wait); #else static inline void bdev_cache_init(void) { } static inline int __sync_blockdev(struct block_device *bdev, int wait) { return 0; } #endif /* * char_dev.c */ extern void __init chrdev_init(void); /* * namei.c */ extern int __inode_permission(struct inode *, int); extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *); extern int vfs_path_lookup(struct dentry *, struct vfsmount *, const char *, unsigned int, struct path *); /* * namespace.c */ extern int copy_mount_options(const void __user *, unsigned long *); extern int copy_mount_string(const void __user *, char **); extern struct vfsmount *lookup_mnt(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 struct lglock vfsmount_lock; extern int __mnt_want_write(struct vfsmount *); extern int __mnt_want_write_file(struct file *); extern void __mnt_drop_write(struct vfsmount *); extern void __mnt_drop_write_file(struct file *); /* * fs_struct.c */ extern void chroot_fs_refs(const struct path *, const struct path *); /* * file_table.c */ extern void file_sb_list_add(struct file *f, struct super_block *sb); extern void file_sb_list_del(struct file *f); extern void mark_files_ro(struct super_block *); extern struct file *get_empty_filp(void); /* * super.c */ extern int do_remount_sb(struct super_block *, int, void *, int); extern bool grab_super_passive(struct super_block *sb); extern struct dentry *mount_fs(struct file_system_type *, int, const char *, void *); extern struct super_block *user_get_super(dev_t); /* * 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 long do_handle_open(int mountdirfd, struct file_handle __user *ufh, int open_flag); extern int open_check_o_direct(struct file *f); /* * inode.c */ extern spinlock_t inode_sb_list_lock; extern long prune_icache_sb(struct super_block *sb, unsigned long nr_to_scan, int nid); extern void inode_add_lru(struct inode *inode); /* * fs-writeback.c */ extern void inode_wb_list_del(struct inode *inode); extern long get_nr_dirty_inodes(void); extern void evict_inodes(struct super_block *); extern int invalidate_inodes(struct super_block *, bool); /* * dcache.c */ extern struct dentry *__d_alloc(struct super_block *, const struct qstr *); extern int d_set_mounted(struct dentry *dentry); extern long prune_dcache_sb(struct super_block *sb, unsigned long nr_to_scan, int nid); /* * read_write.c */ extern ssize_t __kernel_write(struct file *, const char *, size_t, loff_t *); extern int rw_verify_area(int, struct file *, const loff_t *, size_t); /* * splice.c */ extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out, loff_t *opos, size_t len, unsigned int flags); /* * pipe.c */ extern const struct file_operations pipefifo_fops;