fs/internal.h

   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 struct open_flags {
 110         int open_flag;
 111         int mode;
 112         int acc_mode;
 113         int intent;
 114 };
 115 extern struct file *do_filp_open(int dfd, const char *pathname,
 116                 const struct open_flags *op, int lookup_flags);
 117 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
 118                 const char *, const struct open_flags *, int lookup_flags);
 119
 120 extern long do_handle_open(int mountdirfd,
 121                            struct file_handle __user *ufh, int open_flag);
 122
 123 /*
 124  * inode.c
 125  */
 126 extern int get_nr_dirty_inodes(void);
 127 extern void evict_inodes(struct super_block *);
 128 extern int invalidate_inodes(struct super_block *, bool);