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 __inode_permission(struct inode *, int); 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 grab_super_passive(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); 110 111 /* 112 * inode.c 113 */ 114 extern spinlock_t inode_sb_list_lock; 115 extern long prune_icache_sb(struct super_block *sb, unsigned long nr_to_scan, 116 int nid); 117 extern void inode_add_lru(struct inode *inode); 118 119 /* 120 * fs-writeback.c 121 */ 122 extern void inode_wb_list_del(struct inode *inode); 123 124 extern long get_nr_dirty_inodes(void); 125 extern void evict_inodes(struct super_block *); 126 extern int invalidate_inodes(struct super_block *, bool); 127 128 /* 129 * dcache.c 130 */ 131 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *); 132 extern int d_set_mounted(struct dentry *dentry); 133 extern long prune_dcache_sb(struct super_block *sb, unsigned long nr_to_scan, 134 int nid); 135 136 /* 137 * read_write.c 138 */ 139 extern int rw_verify_area(int, struct file *, const loff_t *, size_t); 140 141 /* 142 * splice.c 143 */ 144 extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out, 145 loff_t *opos, size_t len, unsigned int flags); 146 147 /* 148 * pipe.c 149 */ 150 extern const struct file_operations pipefifo_fops; 151 152 /* 153 * fs_pin.c 154 */ 155 extern void sb_pin_kill(struct super_block *sb); 156 extern void mnt_pin_kill(struct mount *m); 157