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 18 /* 19 * block_dev.c 20 */ 21 #ifdef CONFIG_BLOCK 22 extern void __init bdev_cache_init(void); 23 24 extern int __sync_blockdev(struct block_device *bdev, int wait); 25 26 #else 27 static inline void bdev_cache_init(void) 28 { 29 } 30 31 static inline int __sync_blockdev(struct block_device *bdev, int wait) 32 { 33 return 0; 34 } 35 #endif 36 37 /* 38 * buffer.c 39 */ 40 extern void guard_bio_eod(int rw, struct bio *bio); 41 42 /* 43 * char_dev.c 44 */ 45 extern void __init chrdev_init(void); 46 47 /* 48 * namei.c 49 */ 50 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *); 51 extern int vfs_path_lookup(struct dentry *, struct vfsmount *, 52 const char *, unsigned int, struct path *); 53 54 /* 55 * namespace.c 56 */ 57 extern int copy_mount_options(const void __user *, unsigned long *); 58 extern char *copy_mount_string(const void __user *); 59 60 extern struct vfsmount *lookup_mnt(struct path *); 61 extern int finish_automount(struct vfsmount *, struct path *); 62 63 extern int sb_prepare_remount_readonly(struct super_block *); 64 65 extern void __init mnt_init(void); 66 67 extern int __mnt_want_write(struct vfsmount *); 68 extern int __mnt_want_write_file(struct file *); 69 extern void __mnt_drop_write(struct vfsmount *); 70 extern void __mnt_drop_write_file(struct file *); 71 72 /* 73 * fs_struct.c 74 */ 75 extern void chroot_fs_refs(const struct path *, const struct path *); 76 77 /* 78 * file_table.c 79 */ 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 int lookup_flags; 100 }; 101 extern struct file *do_filp_open(int dfd, struct filename *pathname, 102 const struct open_flags *op); 103 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, 104 const char *, const struct open_flags *); 105 106 extern long do_handle_open(int mountdirfd, 107 struct file_handle __user *ufh, int open_flag); 108 extern int open_check_o_direct(struct file *f); 109 110 /* 111 * inode.c 112 */ 113 extern spinlock_t inode_sb_list_lock; 114 extern long prune_icache_sb(struct super_block *sb, unsigned long nr_to_scan, 115 int nid); 116 extern void inode_add_lru(struct inode *inode); 117 118 /* 119 * fs-writeback.c 120 */ 121 extern void inode_wb_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, unsigned long nr_to_scan, 133 int nid); 134 135 /* 136 * read_write.c 137 */ 138 extern int rw_verify_area(int, struct file *, const loff_t *, size_t); 139 140 /* 141 * pipe.c 142 */ 143 extern const struct file_operations pipefifo_fops; 144 145 /* 146 * fs_pin.c 147 */ 148 extern void sb_pin_kill(struct super_block *sb); 149 extern void mnt_pin_kill(struct mount *m); 150 151 /* 152 * fs/nsfs.c 153 */ 154 extern struct dentry_operations ns_dentry_operations; 155