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 iomap; 15 struct linux_binprm; 16 struct path; 17 struct mount; 18 struct shrink_control; 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 * buffer.c 41 */ 42 extern void guard_bio_eod(int rw, struct bio *bio); 43 extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len, 44 get_block_t *get_block, struct iomap *iomap); 45 46 /* 47 * char_dev.c 48 */ 49 extern void __init chrdev_init(void); 50 51 /* 52 * namei.c 53 */ 54 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *); 55 extern int vfs_path_lookup(struct dentry *, struct vfsmount *, 56 const char *, unsigned int, struct path *); 57 58 /* 59 * namespace.c 60 */ 61 extern void *copy_mount_options(const void __user *); 62 extern char *copy_mount_string(const void __user *); 63 64 extern struct vfsmount *lookup_mnt(struct path *); 65 extern int finish_automount(struct vfsmount *, struct path *); 66 67 extern int sb_prepare_remount_readonly(struct super_block *); 68 69 extern void __init mnt_init(void); 70 71 extern int __mnt_want_write(struct vfsmount *); 72 extern int __mnt_want_write_file(struct file *); 73 extern void __mnt_drop_write(struct vfsmount *); 74 extern void __mnt_drop_write_file(struct file *); 75 76 /* 77 * fs_struct.c 78 */ 79 extern void chroot_fs_refs(const struct path *, const struct path *); 80 81 /* 82 * file_table.c 83 */ 84 extern struct file *get_empty_filp(void); 85 86 /* 87 * super.c 88 */ 89 extern int do_remount_sb(struct super_block *, int, void *, int); 90 extern bool trylock_super(struct super_block *sb); 91 extern struct dentry *mount_fs(struct file_system_type *, 92 int, const char *, void *); 93 extern struct super_block *user_get_super(dev_t); 94 95 /* 96 * open.c 97 */ 98 struct open_flags { 99 int open_flag; 100 umode_t mode; 101 int acc_mode; 102 int intent; 103 int lookup_flags; 104 }; 105 extern struct file *do_filp_open(int dfd, struct filename *pathname, 106 const struct open_flags *op); 107 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, 108 const char *, const struct open_flags *); 109 110 extern long do_handle_open(int mountdirfd, 111 struct file_handle __user *ufh, int open_flag); 112 extern int open_check_o_direct(struct file *f); 113 extern int vfs_open(const struct path *, struct file *, const struct cred *); 114 115 /* 116 * inode.c 117 */ 118 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc); 119 extern void inode_add_lru(struct inode *inode); 120 121 /* 122 * fs-writeback.c 123 */ 124 extern void inode_io_list_del(struct inode *inode); 125 126 extern long get_nr_dirty_inodes(void); 127 extern void evict_inodes(struct super_block *); 128 extern int invalidate_inodes(struct super_block *, bool); 129 130 /* 131 * dcache.c 132 */ 133 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *); 134 extern int d_set_mounted(struct dentry *dentry); 135 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc); 136 extern struct dentry *d_alloc_cursor(struct dentry *); 137 138 /* 139 * read_write.c 140 */ 141 extern int rw_verify_area(int, struct file *, const loff_t *, size_t); 142 143 /* 144 * pipe.c 145 */ 146 extern const struct file_operations pipefifo_fops; 147 148 /* 149 * fs_pin.c 150 */ 151 extern void group_pin_kill(struct hlist_head *p); 152 extern void mnt_pin_kill(struct mount *m); 153 154 /* 155 * fs/nsfs.c 156 */ 157 extern struct dentry_operations ns_dentry_operations; 158 159 /* 160 * fs/ioctl.c 161 */ 162 extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd, 163 unsigned long arg); 164 extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 165