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