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 linux_binprm; 16 struct path; 17 18 /* 19 * block_dev.c 20 */ 21 #ifdef CONFIG_BLOCK 22 extern struct super_block *blockdev_superblock; 23 extern void __init bdev_cache_init(void); 24 25 static inline int sb_is_blkdev_sb(struct super_block *sb) 26 { 27 return sb == blockdev_superblock; 28 } 29 30 extern int __sync_blockdev(struct block_device *bdev, int wait); 31 32 #else 33 static inline void bdev_cache_init(void) 34 { 35 } 36 37 static inline int sb_is_blkdev_sb(struct super_block *sb) 38 { 39 return 0; 40 } 41 42 static inline int __sync_blockdev(struct block_device *bdev, int wait) 43 { 44 return 0; 45 } 46 #endif 47 48 /* 49 * char_dev.c 50 */ 51 extern void __init chrdev_init(void); 52 53 /* 54 * exec.c 55 */ 56 extern int check_unsafe_exec(struct linux_binprm *); 57 58 /* 59 * namespace.c 60 */ 61 extern int copy_mount_options(const void __user *, unsigned long *); 62 extern int copy_mount_string(const void __user *, char **); 63 64 extern void free_vfsmnt(struct vfsmount *); 65 extern struct vfsmount *alloc_vfsmnt(const char *); 66 extern unsigned int mnt_get_count(struct vfsmount *mnt); 67 extern struct vfsmount *__lookup_mnt(struct vfsmount *, struct dentry *, int); 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); 102 103 /* 104 * open.c 105 */ 106 struct nameidata; 107 extern struct file *nameidata_to_filp(struct nameidata *); 108 extern void release_open_intent(struct nameidata *); 109 110 /* 111 * inode.c 112 */ 113 extern int get_nr_dirty_inodes(void); 114 extern void evict_inodes(struct super_block *); 115 extern int invalidate_inodes(struct super_block *, bool); 116