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 * char_dev.c 39 */ 40 extern void __init chrdev_init(void); 41 42 /* 43 * namei.c 44 */ 45 extern int __inode_permission(struct inode *, int); 46 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *); 47 extern int vfs_path_lookup(struct dentry *, struct vfsmount *, 48 const char *, unsigned int, struct path *); 49 50 /* 51 * namespace.c 52 */ 53 extern int copy_mount_options(const void __user *, unsigned long *); 54 extern int copy_mount_string(const void __user *, char **); 55 56 extern struct vfsmount *lookup_mnt(struct path *); 57 extern int finish_automount(struct vfsmount *, struct path *); 58 59 extern int sb_prepare_remount_readonly(struct super_block *); 60 61 extern void __init mnt_init(void); 62 63 extern int __mnt_want_write(struct vfsmount *); 64 extern int __mnt_want_write_file(struct file *); 65 extern void __mnt_drop_write(struct vfsmount *); 66 extern void __mnt_drop_write_file(struct file *); 67 68 /* 69 * fs_struct.c 70 */ 71 extern void chroot_fs_refs(const struct path *, const struct path *); 72 73 /* 74 * file_table.c 75 */ 76 extern struct file *get_empty_filp(void); 77 78 /* 79 * super.c 80 */ 81 extern int do_remount_sb(struct super_block *, int, void *, int); 82 extern bool grab_super_passive(struct super_block *sb); 83 extern struct dentry *mount_fs(struct file_system_type *, 84 int, const char *, void *); 85 extern struct super_block *user_get_super(dev_t); 86 87 /* 88 * open.c 89 */ 90 struct open_flags { 91 int open_flag; 92 umode_t mode; 93 int acc_mode; 94 int intent; 95 int lookup_flags; 96 }; 97 extern struct file *do_filp_open(int dfd, struct filename *pathname, 98 const struct open_flags *op); 99 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, 100 const char *, const struct open_flags *); 101 102 extern long do_handle_open(int mountdirfd, 103 struct file_handle __user *ufh, int open_flag); 104 extern int open_check_o_direct(struct file *f); 105 106 /* 107 * inode.c 108 */ 109 extern spinlock_t inode_sb_list_lock; 110 extern long prune_icache_sb(struct super_block *sb, unsigned long nr_to_scan, 111 int nid); 112 extern void inode_add_lru(struct inode *inode); 113 114 /* 115 * fs-writeback.c 116 */ 117 extern void inode_wb_list_del(struct inode *inode); 118 119 extern long 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 extern int d_set_mounted(struct dentry *dentry); 128 extern long prune_dcache_sb(struct super_block *sb, unsigned long nr_to_scan, 129 int nid); 130 131 /* 132 * read_write.c 133 */ 134 extern ssize_t __kernel_write(struct file *, const char *, size_t, loff_t *); 135 extern int rw_verify_area(int, struct file *, const loff_t *, size_t); 136 137 /* 138 * splice.c 139 */ 140 extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out, 141 loff_t *opos, size_t len, unsigned int flags); 142 143 /* 144 * pipe.c 145 */ 146 extern const struct file_operations pipefifo_fops; 147