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 struct super_block; 13 struct file_system_type; 14 struct linux_binprm; 15 struct path; 16 struct mount; 17 struct shrink_control; 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 28 static inline void bdev_cache_init(void) 29 { 30 } 31 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 43 /* 44 * char_dev.c 45 */ 46 extern void __init chrdev_init(void); 47 48 /* 49 * namei.c 50 */ 51 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *); 52 extern int vfs_path_lookup(struct dentry *, struct vfsmount *, 53 const char *, unsigned int, struct path *); 54 55 /* 56 * namespace.c 57 */ 58 extern int copy_mount_options(const void __user *, unsigned long *); 59 extern char *copy_mount_string(const void __user *); 60 61 extern struct vfsmount *lookup_mnt(struct path *); 62 extern int finish_automount(struct vfsmount *, struct path *); 63 64 extern int sb_prepare_remount_readonly(struct super_block *); 65 66 extern void __init mnt_init(void); 67 68 extern int __mnt_want_write(struct vfsmount *); 69 extern int __mnt_want_write_file(struct file *); 70 extern void __mnt_drop_write(struct vfsmount *); 71 extern void __mnt_drop_write_file(struct file *); 72 73 /* 74 * fs_struct.c 75 */ 76 extern void chroot_fs_refs(const struct path *, const struct path *); 77 78 /* 79 * file_table.c 80 */ 81 extern struct file *get_empty_filp(void); 82 83 /* 84 * super.c 85 */ 86 extern int do_remount_sb(struct super_block *, int, void *, int); 87 extern bool trylock_super(struct super_block *sb); 88 extern struct dentry *mount_fs(struct file_system_type *, 89 int, const char *, void *); 90 extern struct super_block *user_get_super(dev_t); 91 92 /* 93 * open.c 94 */ 95 struct open_flags { 96 int open_flag; 97 umode_t mode; 98 int acc_mode; 99 int intent; 100 int lookup_flags; 101 }; 102 extern struct file *do_filp_open(int dfd, struct filename *pathname, 103 const struct open_flags *op); 104 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, 105 const char *, const struct open_flags *); 106 107 extern long do_handle_open(int mountdirfd, 108 struct file_handle __user *ufh, int open_flag); 109 extern int open_check_o_direct(struct file *f); 110 extern int vfs_open(const struct path *, struct file *, const struct cred *); 111 112 /* 113 * inode.c 114 */ 115 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc); 116 extern void inode_add_lru(struct inode *inode); 117 118 /* 119 * fs-writeback.c 120 */ 121 extern void inode_io_list_del(struct inode *inode); 122 123 extern long get_nr_dirty_inodes(void); 124 extern void evict_inodes(struct super_block *); 125 extern int invalidate_inodes(struct super_block *, bool); 126 127 /* 128 * dcache.c 129 */ 130 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *); 131 extern int d_set_mounted(struct dentry *dentry); 132 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc); 133 134 /* 135 * read_write.c 136 */ 137 extern int rw_verify_area(int, struct file *, const loff_t *, size_t); 138 139 /* 140 * pipe.c 141 */ 142 extern const struct file_operations pipefifo_fops; 143 144 /* 145 * fs_pin.c 146 */ 147 extern void group_pin_kill(struct hlist_head *p); 148 extern void mnt_pin_kill(struct mount *m); 149 150 /* 151 * fs/nsfs.c 152 */ 153 extern struct dentry_operations ns_dentry_operations; 154