LXR linux/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
  12struct super_block;
  13struct file_system_type;
  14struct iomap;
  15struct iomap_ops;
  16struct linux_binprm;
  17struct path;
  18struct mount;
  19struct shrink_control;
  20
  21/*
  22 * block_dev.c
  23 */
  24#ifdef CONFIG_BLOCK
  25extern void __init bdev_cache_init(void);
  26
  27extern int __sync_blockdev(struct block_device *bdev, int wait);
  28
  29#else
  30static inline void bdev_cache_init(void)
  31{
  32}
  33
  34static inline int __sync_blockdev(struct block_device *bdev, int wait)
  35{
  36        return 0;
  37}
  38#endif
  39
  40/*
  41 * buffer.c
  42 */
  43extern void guard_bio_eod(int rw, struct bio *bio);
  44extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
  45                get_block_t *get_block, struct iomap *iomap);
  46
  47/*
  48 * char_dev.c
  49 */
  50extern void __init chrdev_init(void);
  51
  52/*
  53 * namei.c
  54 */
  55extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
  56extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
  57                           const char *, unsigned int, struct path *);
  58long do_mknodat(int dfd, const char __user *filename, umode_t mode,
  59                unsigned int dev);
  60long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
  61long do_rmdir(int dfd, const char __user *pathname);
  62long do_unlinkat(int dfd, struct filename *name);
  63long do_symlinkat(const char __user *oldname, int newdfd,
  64                  const char __user *newname);
  65int do_linkat(int olddfd, const char __user *oldname, int newdfd,
  66              const char __user *newname, int flags);
  67
  68/*
  69 * namespace.c
  70 */
  71extern void *copy_mount_options(const void __user *);
  72extern char *copy_mount_string(const void __user *);
  73
  74extern struct vfsmount *lookup_mnt(const struct path *);
  75extern int finish_automount(struct vfsmount *, struct path *);
  76
  77extern int sb_prepare_remount_readonly(struct super_block *);
  78
  79extern void __init mnt_init(void);
  80
  81extern int __mnt_want_write(struct vfsmount *);
  82extern int __mnt_want_write_file(struct file *);
  83extern int mnt_want_write_file_path(struct file *);
  84extern void __mnt_drop_write(struct vfsmount *);
  85extern void __mnt_drop_write_file(struct file *);
  86extern void mnt_drop_write_file_path(struct file *);
  87
  88/*
  89 * fs_struct.c
  90 */
  91extern void chroot_fs_refs(const struct path *, const struct path *);
  92
  93/*
  94 * file_table.c
  95 */
  96extern struct file *get_empty_filp(void);
  97
  98/*
  99 * super.c
 100 */
 101extern int do_remount_sb(struct super_block *, int, void *, int);
 102extern bool trylock_super(struct super_block *sb);
 103extern struct dentry *mount_fs(struct file_system_type *,
 104                               int, const char *, void *);
 105extern struct super_block *user_get_super(dev_t);
 106
 107/*
 108 * open.c
 109 */
 110struct open_flags {
 111        int open_flag;
 112        umode_t mode;
 113        int acc_mode;
 114        int intent;
 115        int lookup_flags;
 116};
 117extern struct file *do_filp_open(int dfd, struct filename *pathname,
 118                const struct open_flags *op);
 119extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
 120                const char *, const struct open_flags *);
 121
 122long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
 123long do_faccessat(int dfd, const char __user *filename, int mode);
 124int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
 125int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
 126                int flag);
 127
 128extern int open_check_o_direct(struct file *f);
 129extern int vfs_open(const struct path *, struct file *, const struct cred *);
 130extern struct file *filp_clone_open(struct file *);
 131
 132/*
 133 * inode.c
 134 */
 135extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
 136extern void inode_add_lru(struct inode *inode);
 137extern int dentry_needs_remove_privs(struct dentry *dentry);
 138
 139extern bool __atime_needs_update(const struct path *, struct inode *, bool);
 140static inline bool atime_needs_update_rcu(const struct path *path,
 141                                          struct inode *inode)
 142{
 143        return __atime_needs_update(path, inode, true);
 144}
 145
 146/*
 147 * fs-writeback.c
 148 */
 149extern void inode_io_list_del(struct inode *inode);
 150
 151extern long get_nr_dirty_inodes(void);
 152extern int invalidate_inodes(struct super_block *, bool);
 153
 154/*
 155 * dcache.c
 156 */
 157extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
 158extern int d_set_mounted(struct dentry *dentry);
 159extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
 160extern struct dentry *d_alloc_cursor(struct dentry *);
 161
 162/*
 163 * read_write.c
 164 */
 165extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
 166
 167/*
 168 * pipe.c
 169 */
 170extern const struct file_operations pipefifo_fops;
 171
 172/*
 173 * fs_pin.c
 174 */
 175extern void group_pin_kill(struct hlist_head *p);
 176extern void mnt_pin_kill(struct mount *m);
 177
 178/*
 179 * fs/nsfs.c
 180 */
 181extern const struct dentry_operations ns_dentry_operations;
 182
 183/*
 184 * fs/ioctl.c
 185 */
 186extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
 187                    unsigned long arg);
 188extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
 189
 190/*
 191 * iomap support:
 192 */
 193typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
 194                void *data, struct iomap *iomap);
 195
 196loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
 197                unsigned flags, const struct iomap_ops *ops, void *data,
 198                iomap_actor_t actor);
 199
 200/* direct-io.c: */
 201int sb_init_dio_done_wq(struct super_block *sb);
 202