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 #include <linux/lglock.h> 13 14 struct super_block; 15 struct file_system_type; 16 struct linux_binprm; 17 struct path; 18 struct mount; 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 * char_dev.c 41 */ 42 extern void __init chrdev_init(void); 43 44 /* 45 * namei.c 46 */ 47 extern int __inode_permission(struct inode *, int); 48 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *); 49 extern int vfs_path_lookup(struct dentry *, struct vfsmount *, 50 const char *, unsigned int, struct path *); 51 52 /* 53 * namespace.c 54 */ 55 extern int copy_mount_options(const void __user *, unsigned long *); 56 extern int copy_mount_string(const void __user *, char **); 57 58 extern struct vfsmount *lookup_mnt(struct path *); 59 extern int finish_automount(struct vfsmount *, struct path *); 60 61 extern int sb_prepare_remount_readonly(struct super_block *); 62 63 extern void __init mnt_init(void); 64 65 extern struct lglock vfsmount_lock; 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 void file_sb_list_add(struct file *f, struct super_block *sb); 81 extern void file_sb_list_del(struct file *f); 82 extern void mark_files_ro(struct super_block *); 83 extern struct file *get_empty_filp(void); 84 85 /* 86 * super.c 87 */ 88 extern int do_remount_sb(struct super_block *, int, void *, int); 89 extern bool grab_super_passive(struct super_block *sb); 90 extern struct dentry *mount_fs(struct file_system_type *, 91 int, const char *, void *); 92 extern struct super_block *user_get_super(dev_t); 93 94 /* 95 * open.c 96 */ 97 struct open_flags { 98 int open_flag; 99 umode_t mode; 100 int acc_mode; 101 int intent; 102 int lookup_flags; 103 }; 104 extern struct file *do_filp_open(int dfd, struct filename *pathname, 105 const struct open_flags *op); 106 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, 107 const char *, const struct open_flags *); 108 109 extern long do_handle_open(int mountdirfd, 110 struct file_handle __user *ufh, int open_flag); 111 extern int open_check_o_direct(struct file *f); 112 113 /* 114 * inode.c 115 */ 116 extern spinlock_t inode_sb_list_lock; 117 extern long prune_icache_sb(struct super_block *sb, unsigned long nr_to_scan, 118 int nid); 119 extern void inode_add_lru(struct inode *inode); 120 121 /* 122 * fs-writeback.c 123 */ 124 extern void inode_wb_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, unsigned long nr_to_scan, 136 int nid); 137 138 /* 139 * read_write.c 140 */ 141 extern ssize_t __kernel_write(struct file *, const char *, size_t, loff_t *); 142 extern int rw_verify_area(int, struct file *, const loff_t *, size_t); 143 144 /* 145 * splice.c 146 */ 147 extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out, 148 loff_t *opos, size_t len, unsigned int flags); 149 150 /* 151 * pipe.c 152 */ 153 extern const struct file_operations pipefifo_fops; 154