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 struct super_block;
  13 struct file_system_type;
  14 struct iomap;
  15 struct iomap_ops;
  16 struct linux_binprm;
  17 struct path;
  18 struct mount;
  19 struct shrink_control;
  20
  21 /*
  22  * block_dev.c
  23  */
  24 #ifdef CONFIG_BLOCK
  25 extern void __init bdev_cache_init(void);
  26
  27 extern int __sync_blockdev(struct block_device *bdev, int wait);
  28
  29 #else
  30 static inline void bdev_cache_init(void)
  31 {
  32 }
  33
  34 static inline int __sync_blockdev(struct block_device *bdev, int wait)
  35 {
  36         return 0;
  37 }
  38 #endif
  39
  40 /*
  41  * buffer.c
  42  */
  43 extern void guard_bio_eod(int rw, struct bio *bio);
  44 extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
  45                 get_block_t *get_block, struct iomap *iomap);
  46 int __generic_write_end(struct inode *inode, loff_t pos, unsigned copied,
  47                 struct page *page);
  48
  49 /*
  50  * char_dev.c
  51  */
  52 extern void __init chrdev_init(void);
  53
  54 /*
  55  * namei.c
  56  */
  57 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
  58 extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
  59                            const char *, unsigned int, struct path *);
  60 long do_mknodat(int dfd, const char __user *filename, umode_t mode,
  61                 unsigned int dev);
  62 long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
  63 long do_rmdir(int dfd, const char __user *pathname);
  64 long do_unlinkat(int dfd, struct filename *name);
  65 long do_symlinkat(const char __user *oldname, int newdfd,
  66                   const char __user *newname);
  67 int do_linkat(int olddfd, const char __user *oldname, int newdfd,
  68               const char __user *newname, int flags);
  69
  70 /*
  71  * namespace.c
  72  */
  73 extern void *copy_mount_options(const void __user *);
  74 extern char *copy_mount_string(const void __user *);
  75
  76 extern struct vfsmount *lookup_mnt(const struct path *);
  77 extern int finish_automount(struct vfsmount *, struct path *);
  78
  79 extern int sb_prepare_remount_readonly(struct super_block *);
  80
  81 extern void __init mnt_init(void);
  82
  83 extern int __mnt_want_write_file(struct file *);
  84 extern void __mnt_drop_write_file(struct file *);
  85
  86 /*
  87  * fs_struct.c
  88  */
  89 extern void chroot_fs_refs(const struct path *, const struct path *);
  90
  91 /*
  92  * file_table.c
  93  */
  94 extern struct file *alloc_empty_file(int, const struct cred *);
  95 extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
  96
  97 /*
  98  * super.c
  99  */
 100 extern int do_remount_sb(struct super_block *, int, void *, int);
 101 extern bool trylock_super(struct super_block *sb);
 102 extern struct dentry *mount_fs(struct file_system_type *,
 103                                int, const char *, void *);
 104 extern struct super_block *user_get_super(dev_t);
 105
 106 /*
 107  * open.c
 108  */
 109 struct open_flags {
 110         int open_flag;
 111         umode_t mode;
 112         int acc_mode;
 113         int intent;
 114         int lookup_flags;
 115 };
 116 extern struct file *do_filp_open(int dfd, struct filename *pathname,
 117                 const struct open_flags *op);
 118 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
 119                 const char *, const struct open_flags *);
 120
 121 long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
 122 long do_faccessat(int dfd, const char __user *filename, int mode);
 123 int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
 124 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
 125                 int flag);
 126
 127 extern int vfs_open(const struct path *, struct file *);
 128
 129 /*
 130  * inode.c
 131  */
 132 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
 133 extern void inode_add_lru(struct inode *inode);
 134 extern int dentry_needs_remove_privs(struct dentry *dentry);
 135
 136 /*
 137  * fs-writeback.c
 138  */
 139 extern void inode_io_list_del(struct inode *inode);
 140
 141 extern long get_nr_dirty_inodes(void);
 142 extern int invalidate_inodes(struct super_block *, bool);
 143
 144 /*
 145  * dcache.c
 146  */
 147 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
 148 extern int d_set_mounted(struct dentry *dentry);
 149 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
 150 extern struct dentry *d_alloc_cursor(struct dentry *);
 151
 152 /*
 153  * read_write.c
 154  */
 155 extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
 156
 157 /*
 158  * pipe.c
 159  */
 160 extern const struct file_operations pipefifo_fops;
 161
 162 /*
 163  * fs_pin.c
 164  */
 165 extern void group_pin_kill(struct hlist_head *p);
 166 extern void mnt_pin_kill(struct mount *m);
 167
 168 /*
 169  * fs/nsfs.c
 170  */
 171 extern const struct dentry_operations ns_dentry_operations;
 172
 173 /*
 174  * fs/ioctl.c
 175  */
 176 extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
 177                     unsigned long arg);
 178
 179 /*
 180  * iomap support:
 181  */
 182 typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
 183                 void *data, struct iomap *iomap);
 184
 185 loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
 186                 unsigned flags, const struct iomap_ops *ops, void *data,
 187                 iomap_actor_t actor);
 188
 189 /* direct-io.c: */
 190 int sb_init_dio_done_wq(struct super_block *sb);