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;
  17struct user_namespace;
  18
  19/*
  20 * block_dev.c
  21 */
  22#ifdef CONFIG_BLOCK
  23extern void __init bdev_cache_init(void);
  24
  25extern int __sync_blockdev(struct block_device *bdev, int wait);
  26
  27#else
  28static inline void bdev_cache_init(void)
  29{
  30}
  31
  32static inline int __sync_blockdev(struct block_device *bdev, int wait)
  33{
  34        return 0;
  35}
  36#endif
  37
  38/*
  39 * buffer.c
  40 */
  41extern void guard_bio_eod(int rw, struct bio *bio);
  42extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
  43                get_block_t *get_block, struct iomap *iomap);
  44
  45/*
  46 * char_dev.c
  47 */
  48extern void __init chrdev_init(void);
  49
  50/*
  51 * fs_context.c
  52 */
  53extern const struct fs_context_operations legacy_fs_context_ops;
  54extern int parse_monolithic_mount_data(struct fs_context *, void *);
  55extern void fc_drop_locked(struct fs_context *);
  56extern void vfs_clean_context(struct fs_context *fc);
  57extern int finish_clean_context(struct fs_context *fc);
  58
  59/*
  60 * namei.c
  61 */
  62extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
  63                           struct path *path, struct path *root);
  64extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
  65extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
  66                           const char *, unsigned int, struct path *);
  67long do_mknodat(int dfd, const char __user *filename, umode_t mode,
  68                unsigned int dev);
  69long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
  70long do_rmdir(int dfd, const char __user *pathname);
  71long do_unlinkat(int dfd, struct filename *name);
  72long do_symlinkat(const char __user *oldname, int newdfd,
  73                  const char __user *newname);
  74int do_linkat(int olddfd, const char __user *oldname, int newdfd,
  75              const char __user *newname, int flags);
  76
  77/*
  78 * namespace.c
  79 */
  80extern void *copy_mount_options(const void __user *);
  81extern char *copy_mount_string(const void __user *);
  82
  83extern struct vfsmount *lookup_mnt(const struct path *);
  84extern int finish_automount(struct vfsmount *, struct path *);
  85
  86extern int sb_prepare_remount_readonly(struct super_block *);
  87
  88extern void __init mnt_init(void);
  89
  90extern int __mnt_want_write_file(struct file *);
  91extern void __mnt_drop_write_file(struct file *);
  92
  93extern void dissolve_on_fput(struct vfsmount *);
  94/*
  95 * fs_struct.c
  96 */
  97extern void chroot_fs_refs(const struct path *, const struct path *);
  98
  99/*
 100 * file_table.c
 101 */
 102extern struct file *alloc_empty_file(int, const struct cred *);
 103extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
 104
 105/*
 106 * super.c
 107 */
 108extern int reconfigure_super(struct fs_context *);
 109extern bool trylock_super(struct super_block *sb);
 110extern struct super_block *user_get_super(dev_t);
 111extern bool mount_capable(struct fs_context *);
 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 *);
 159extern char *simple_dname(struct dentry *, char *, int);
 160extern void dput_to_list(struct dentry *, struct list_head *);
 161extern void shrink_dentry_list(struct list_head *);
 162
 163/*
 164 * read_write.c
 165 */
 166extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
 167
 168/*
 169 * pipe.c
 170 */
 171extern const struct file_operations pipefifo_fops;
 172
 173/*
 174 * fs_pin.c
 175 */
 176extern void group_pin_kill(struct hlist_head *p);
 177extern void mnt_pin_kill(struct mount *m);
 178
 179/*
 180 * fs/nsfs.c
 181 */
 182extern const struct dentry_operations ns_dentry_operations;
 183
 184/*
 185 * fs/ioctl.c
 186 */
 187extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
 188                    unsigned long arg);
 189
 190/* direct-io.c: */
 191int sb_init_dio_done_wq(struct super_block *sb);
 192