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 19 /* 20 * block_dev.c 21 */ 22 #ifdef CONFIG_BLOCK 23 extern struct super_block *blockdev_superblock; 24 extern void __init bdev_cache_init(void); 25 26 static inline int sb_is_blkdev_sb(struct super_block *sb) 27 { 28 return sb == blockdev_superblock; 29 } 30 31 extern int __sync_blockdev(struct block_device *bdev, int wait); 32 33 #else 34 static inline void bdev_cache_init(void) 35 { 36 } 37 38 static inline int sb_is_blkdev_sb(struct super_block *sb) 39 { 40 return 0; 41 } 42 43 static inline int __sync_blockdev(struct block_device *bdev, int wait) 44 { 45 return 0; 46 } 47 #endif 48 49 /* 50 * char_dev.c 51 */ 52 extern void __init chrdev_init(void); 53 54 /* 55 * exec.c 56 */ 57 extern int check_unsafe_exec(struct linux_binprm *); 58 59 /* 60 * namespace.c 61 */ 62 extern int copy_mount_options(const void __user *, unsigned long *); 63 extern int copy_mount_string(const void __user *, char **); 64 65 extern unsigned int mnt_get_count(struct vfsmount *mnt); 66 extern struct vfsmount *__lookup_mnt(struct vfsmount *, struct dentry *, int); 67 extern struct vfsmount *lookup_mnt(struct path *); 68 extern void mnt_set_mountpoint(struct vfsmount *, struct dentry *, 69 struct vfsmount *); 70 extern void release_mounts(struct list_head *); 71 extern void umount_tree(struct vfsmount *, int, struct list_head *); 72 extern struct vfsmount *copy_tree(struct vfsmount *, struct dentry *, int); 73 extern int finish_automount(struct vfsmount *, struct path *); 74 75 extern void mnt_make_longterm(struct vfsmount *); 76 extern void mnt_make_shortterm(struct vfsmount *); 77 78 extern void __init mnt_init(void); 79 80 DECLARE_BRLOCK(vfsmount_lock); 81 82 83 /* 84 * fs_struct.c 85 */ 86 extern void chroot_fs_refs(struct path *, struct path *); 87 88 /* 89 * file_table.c 90 */ 91 extern void file_sb_list_add(struct file *f, struct super_block *sb); 92 extern void file_sb_list_del(struct file *f); 93 extern void mark_files_ro(struct super_block *); 94 extern struct file *get_empty_filp(void); 95 96 /* 97 * super.c 98 */ 99 extern int do_remount_sb(struct super_block *, int, void *, int); 100 extern void __put_super(struct super_block *sb); 101 extern void put_super(struct super_block *sb); 102 extern struct dentry *mount_fs(struct file_system_type *, 103 int, const char *, void *); 104 105 /* 106 * open.c 107 */ 108 struct nameidata; 109 extern struct file *nameidata_to_filp(struct nameidata *); 110 extern void release_open_intent(struct nameidata *); 111 struct open_flags { 112 int open_flag; 113 int mode; 114 int acc_mode; 115 int intent; 116 }; 117 extern struct file *do_filp_open(int dfd, const char *pathname, 118 const struct open_flags *op, int lookup_flags); 119 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, 120 const char *, const struct open_flags *, int lookup_flags); 121 122 extern long do_handle_open(int mountdirfd, 123 struct file_handle __user *ufh, int open_flag); 124 125 /* 126 * inode.c 127 */ 128 extern spinlock_t inode_sb_list_lock; 129 130 /* 131 * fs-writeback.c 132 */ 133 extern void inode_wb_list_del(struct inode *inode); 134 135 extern int get_nr_dirty_inodes(void); 136 extern void evict_inodes(struct super_block *); 137 extern int invalidate_inodes(struct super_block *, bool); 138