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 12 #include <linux/lglock.h> 13 14 struct super_block; 15 struct file_system_type; 16 struct linux_binprm; 17 struct path; 18 struct mount; 19 20 /* 21 * block_dev.c 22 */ 23 #ifdef CONFIG_BLOCK 24 extern void __init bdev_cache_init(void); 25 26 extern int __sync_blockdev(struct block_device *bdev, int wait); 27 28 #else 29 static inline void bdev_cache_init(void) 30 { 31 } 32 33 static inline int __sync_blockdev(struct block_device *bdev, int wait) 34 { 35 return 0; 36 } 37 #endif 38 39 /* 40 * char_dev.c 41 */ 42 extern void __init chrdev_init(void); 43 44 /* 45 * namei.c 46 */ 47 extern int __inode_permission(struct inode *, int); 48 49 /* 50 * namespace.c 51 */ 52 extern int copy_mount_options(const void __user *, unsigned long *); 53 extern int copy_mount_string(const void __user *, char **); 54 55 extern struct vfsmount *lookup_mnt(struct path *); 56 extern int finish_automount(struct vfsmount *, struct path *); 57 58 extern int sb_prepare_remount_readonly(struct super_block *); 59 60 extern void __init mnt_init(void); 61 62 extern struct lglock vfsmount_lock; 63 64 extern int __mnt_want_write(struct vfsmount *); 65 extern int __mnt_want_write_file(struct file *); 66 extern void __mnt_drop_write(struct vfsmount *); 67 extern void __mnt_drop_write_file(struct file *); 68 69 /* 70 * fs_struct.c 71 */ 72 extern void chroot_fs_refs(struct path *, struct path *); 73 74 /* 75 * file_table.c 76 */ 77 extern void file_sb_list_add(struct file *f, struct super_block *sb); 78 extern void file_sb_list_del(struct file *f); 79 extern void mark_files_ro(struct super_block *); 80 extern struct file *get_empty_filp(void); 81 82 /* 83 * super.c 84 */ 85 extern int do_remount_sb(struct super_block *, int, void *, int); 86 extern bool grab_super_passive(struct super_block *sb); 87 extern struct dentry *mount_fs(struct file_system_type *, 88 int, const char *, void *); 89 extern struct super_block *user_get_super(dev_t); 90 91 /* 92 * open.c 93 */ 94 struct open_flags { 95 int open_flag; 96 umode_t mode; 97 int acc_mode; 98 int intent; 99 }; 100 extern struct file *do_filp_open(int dfd, struct filename *pathname, 101 const struct open_flags *op, int flags); 102 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, 103 const char *, const struct open_flags *, int lookup_flags); 104 105 extern long do_handle_open(int mountdirfd, 106 struct file_handle __user *ufh, int open_flag); 107 extern int open_check_o_direct(struct file *f); 108 109 /* 110 * inode.c 111 */ 112 extern spinlock_t inode_sb_list_lock; 113 114 /* 115 * fs-writeback.c 116 */ 117 extern void inode_wb_list_del(struct inode *inode); 118 119 extern int get_nr_dirty_inodes(void); 120 extern void evict_inodes(struct super_block *); 121 extern int invalidate_inodes(struct super_block *, bool); 122 123 /* 124 * dcache.c 125 */ 126 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *); 127