LXR linux/fs/internal.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/* fs/ internal definitions
   3 *
   4 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
   5 * Written by David Howells (dhowells@redhat.com)
   6 */
   7
   8struct super_block;
   9struct file_system_type;
  10struct iomap;
  11struct iomap_ops;
  12struct linux_binprm;
  13struct path;
  14struct mount;
  15struct shrink_control;
  16struct fs_context;
  17
  18/*
  19 * block_dev.c
  20 */
  21#ifdef CONFIG_BLOCK
  22extern void __init bdev_cache_init(void);
  23
  24extern int __sync_blockdev(struct block_device *bdev, int wait);
  25
  26#else
  27static inline void bdev_cache_init(void)
  28{
  29}
  30
  31static inline int __sync_blockdev(struct block_device *bdev, int wait)
  32{
  33        return 0;
  34}
  35#endif
  36
  37/*
  38 * buffer.c
  39 */
  40extern void guard_bio_eod(int rw, struct bio *bio);
  41extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
  42                get_block_t *get_block, struct iomap *iomap);
  43void __generic_write_end(struct inode *inode, loff_t pos, unsigned copied,
  44                struct page *page);
  45
  46/*
  47 * char_dev.c
  48 */
  49extern void __init chrdev_init(void);
  50
  51/*
  52 * fs_context.c
  53 */
  54extern const struct fs_context_operations legacy_fs_context_ops;
  55extern int parse_monolithic_mount_data(struct fs_context *, void *);
  56extern void fc_drop_locked(struct fs_context *);
  57extern void vfs_clean_context(struct fs_context *fc);
  58extern int finish_clean_context(struct fs_context *fc);
  59
  60/*
  61 * namei.c
  62 */
  63extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
  64                           struct path *path, struct path *root);
  65extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
  66extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
  67                           const char *, unsigned int, struct path *);
  68long do_mknodat(int dfd, const char __user *filename, umode_t mode,
  69                unsigned int dev);
  70long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
  71long do_rmdir(int dfd, const char __user *pathname);
  72long do_unlinkat(int dfd, struct filename *name);
  73long do_symlinkat(const char __user *oldname, int newdfd,
  74                  const char __user *newname);
  75int do_linkat(int olddfd, const char __user *oldname, int newdfd,
  76              const char __user *newname, int flags);
  77
  78/*
  79 * namespace.c
  80 */
  81extern void *copy_mount_options(const void __user *);
  82extern char *copy_mount_string(const void __user *);
  83
  84extern struct vfsmount *lookup_mnt(const struct path *);
  85extern int finish_automount(struct vfsmount *, struct path *);
  86
  87extern int sb_prepare_remount_readonly(struct super_block *);
  88
  89extern void __init mnt_init(void);
  90
  91extern int __mnt_want_write_file(struct file *);
  92extern void __mnt_drop_write_file(struct file *);
  93
  94extern void dissolve_on_fput(struct vfsmount *);
  95/*
  96 * fs_struct.c
  97 */
  98extern void chroot_fs_refs(const struct path *, const struct path *);
  99
 100/*
 101 * file_table.c
 102 */
 103extern struct file *alloc_empty_file(int, const struct cred *);
 104extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
 105
 106/*
 107 * super.c
 108 */
 109extern int reconfigure_super(struct fs_context *);
 110extern bool trylock_super(struct super_block *sb);
 111extern struct super_block *user_get_super(dev_t);
 112
 113/*
 114 * open.c
 115 */
 116struct open_flags {
 117        int open_flag;
 118        umode_t mode;
 119        int acc_mode;
 120        int intent;
 121        int lookup_flags;
 122};
 123extern struct file *do_filp_open(int dfd, struct filename *pathname,
 124                const struct open_flags *op);
 125extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
 126                const char *, const struct open_flags *);
 127
 128long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
 129long do_faccessat(int dfd, const char __user *filename, int mode);
 130int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
 131int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
 132                int flag);
 133
 134extern int vfs_open(const struct path *, struct file *);
 135
 136/*
 137 * inode.c
 138 */
 139extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
 140extern void inode_add_lru(struct inode *inode);
 141extern int dentry_needs_remove_privs(struct dentry *dentry);
 142
 143/*
 144 * fs-writeback.c
 145 */
 146extern void inode_io_list_del(struct inode *inode);
 147
 148extern long get_nr_dirty_inodes(void);
 149extern int invalidate_inodes(struct super_block *, bool);
 150
 151/*
 152 * dcache.c
 153 */
 154extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
 155extern int d_set_mounted(struct dentry *dentry);
 156extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
 157extern struct dentry *d_alloc_cursor(struct dentry *);
 158extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
 159
 160/*
 161 * read_write.c
 162 */
 163extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
 164
 165/*
 166 * pipe.c
 167 */
 168extern const struct file_operations pipefifo_fops;
 169
 170/*
 171 * fs_pin.c
 172 */
 173extern void group_pin_kill(struct hlist_head *p);
 174extern void mnt_pin_kill(struct mount *m);
 175
 176/*
 177 * fs/nsfs.c
 178 */
 179extern const struct dentry_operations ns_dentry_operations;
 180
 181/*
 182 * fs/ioctl.c
 183 */
 184extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
 185                    unsigned long arg);
 186
 187/*
 188 * iomap support:
 189 */
 190typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
 191                void *data, struct iomap *iomap);
 192
 193loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
 194                unsigned flags, const struct iomap_ops *ops, void *data,
 195                iomap_actor_t actor);
 196
 197/* direct-io.c: */
 198int sb_init_dio_done_wq(struct super_block *sb);
 199