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;
  18struct pipe_inode_info;
  19
  20/*
  21 * block_dev.c
  22 */
  23#ifdef CONFIG_BLOCK
  24extern void __init bdev_cache_init(void);
  25
  26extern int __sync_blockdev(struct block_device *bdev, int wait);
  27void iterate_bdevs(void (*)(struct block_device *, void *), void *);
  28void emergency_thaw_bdev(struct super_block *sb);
  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}
  38static inline void iterate_bdevs(void (*f)(struct block_device *, void *),
  39                void *arg)
  40{
  41}
  42static inline int emergency_thaw_bdev(struct super_block *sb)
  43{
  44        return 0;
  45}
  46#endif /* CONFIG_BLOCK */
  47
  48/*
  49 * buffer.c
  50 */
  51extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
  52                get_block_t *get_block, struct iomap *iomap);
  53
  54/*
  55 * char_dev.c
  56 */
  57extern void __init chrdev_init(void);
  58
  59/*
  60 * fs_context.c
  61 */
  62extern const struct fs_context_operations legacy_fs_context_ops;
  63extern int parse_monolithic_mount_data(struct fs_context *, void *);
  64extern void vfs_clean_context(struct fs_context *fc);
  65extern int finish_clean_context(struct fs_context *fc);
  66
  67/*
  68 * namei.c
  69 */
  70extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
  71                           struct path *path, struct path *root);
  72extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
  73                           const char *, unsigned int, struct path *);
  74long do_rmdir(int dfd, struct filename *name);
  75long do_unlinkat(int dfd, struct filename *name);
  76int may_linkat(struct user_namespace *mnt_userns, struct path *link);
  77int do_renameat2(int olddfd, struct filename *oldname, int newdfd,
  78                 struct filename *newname, unsigned int flags);
  79
  80/*
  81 * namespace.c
  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
  95int path_mount(const char *dev_name, struct path *path,
  96                const char *type_page, unsigned long flags, void *data_page);
  97int path_umount(struct path *path, int flags);
  98
  99/*
 100 * fs_struct.c
 101 */
 102extern void chroot_fs_refs(const struct path *, const struct path *);
 103
 104/*
 105 * file_table.c
 106 */
 107extern struct file *alloc_empty_file(int, const struct cred *);
 108extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
 109
 110/*
 111 * super.c
 112 */
 113extern int reconfigure_super(struct fs_context *);
 114extern bool trylock_super(struct super_block *sb);
 115struct super_block *user_get_super(dev_t, bool excl);
 116void put_super(struct super_block *sb);
 117extern bool mount_capable(struct fs_context *);
 118
 119/*
 120 * open.c
 121 */
 122struct open_flags {
 123        int open_flag;
 124        umode_t mode;
 125        int acc_mode;
 126        int intent;
 127        int lookup_flags;
 128};
 129extern struct file *do_filp_open(int dfd, struct filename *pathname,
 130                const struct open_flags *op);
 131extern struct file *do_file_open_root(const struct path *,
 132                const char *, const struct open_flags *);
 133extern struct open_how build_open_how(int flags, umode_t mode);
 134extern int build_open_flags(const struct open_how *how, struct open_flags *op);
 135extern int __close_fd_get_file(unsigned int fd, struct file **res);
 136
 137long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
 138int chmod_common(const struct path *path, umode_t mode);
 139int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
 140                int flag);
 141int chown_common(const struct path *path, uid_t user, gid_t group);
 142extern int vfs_open(const struct path *, struct file *);
 143
 144/*
 145 * inode.c
 146 */
 147extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
 148extern void inode_add_lru(struct inode *inode);
 149extern int dentry_needs_remove_privs(struct dentry *dentry);
 150
 151/*
 152 * fs-writeback.c
 153 */
 154extern long get_nr_dirty_inodes(void);
 155extern int invalidate_inodes(struct super_block *, bool);
 156
 157/*
 158 * dcache.c
 159 */
 160extern int d_set_mounted(struct dentry *dentry);
 161extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
 162extern struct dentry *d_alloc_cursor(struct dentry *);
 163extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
 164extern char *simple_dname(struct dentry *, char *, int);
 165extern void dput_to_list(struct dentry *, struct list_head *);
 166extern void shrink_dentry_list(struct list_head *);
 167
 168/*
 169 * read_write.c
 170 */
 171extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
 172
 173/*
 174 * pipe.c
 175 */
 176extern const struct file_operations pipefifo_fops;
 177
 178/*
 179 * fs_pin.c
 180 */
 181extern void group_pin_kill(struct hlist_head *p);
 182extern void mnt_pin_kill(struct mount *m);
 183
 184/*
 185 * fs/nsfs.c
 186 */
 187extern const struct dentry_operations ns_dentry_operations;
 188
 189/* direct-io.c: */
 190int sb_init_dio_done_wq(struct super_block *sb);
 191
 192/*
 193 * fs/stat.c:
 194 */
 195int do_statx(int dfd, const char __user *filename, unsigned flags,
 196             unsigned int mask, struct statx __user *buffer);
 197
 198/*
 199 * fs/splice.c:
 200 */
 201long splice_file_to_pipe(struct file *in,
 202                         struct pipe_inode_info *opipe,
 203                         loff_t *offset,
 204                         size_t len, unsigned int flags);
 205