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/bdev.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 */
  51int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
  52                get_block_t *get_block, const 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 *);
  74int do_rmdir(int dfd, struct filename *name);
  75int 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);
  79int do_mkdirat(int dfd, struct filename *name, umode_t mode);
  80int do_symlinkat(struct filename *from, int newdfd, struct filename *to);
  81int do_linkat(int olddfd, struct filename *old, int newdfd,
  82                        struct filename *new, int flags);
  83
  84/*
  85 * namespace.c
  86 */
  87extern struct vfsmount *lookup_mnt(const struct path *);
  88extern int finish_automount(struct vfsmount *, struct path *);
  89
  90extern int sb_prepare_remount_readonly(struct super_block *);
  91
  92extern void __init mnt_init(void);
  93
  94extern int __mnt_want_write_file(struct file *);
  95extern void __mnt_drop_write_file(struct file *);
  96
  97extern void dissolve_on_fput(struct vfsmount *);
  98
  99int path_mount(const char *dev_name, struct path *path,
 100                const char *type_page, unsigned long flags, void *data_page);
 101int path_umount(struct path *path, int flags);
 102
 103/*
 104 * fs_struct.c
 105 */
 106extern void chroot_fs_refs(const struct path *, const struct path *);
 107
 108/*
 109 * file_table.c
 110 */
 111extern struct file *alloc_empty_file(int, const struct cred *);
 112extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
 113
 114/*
 115 * super.c
 116 */
 117extern int reconfigure_super(struct fs_context *);
 118extern bool trylock_super(struct super_block *sb);
 119struct super_block *user_get_super(dev_t, bool excl);
 120void put_super(struct super_block *sb);
 121extern bool mount_capable(struct fs_context *);
 122
 123/*
 124 * open.c
 125 */
 126struct open_flags {
 127        int open_flag;
 128        umode_t mode;
 129        int acc_mode;
 130        int intent;
 131        int lookup_flags;
 132};
 133extern struct file *do_filp_open(int dfd, struct filename *pathname,
 134                const struct open_flags *op);
 135extern struct file *do_file_open_root(const struct path *,
 136                const char *, const struct open_flags *);
 137extern struct open_how build_open_how(int flags, umode_t mode);
 138extern int build_open_flags(const struct open_how *how, struct open_flags *op);
 139extern int __close_fd_get_file(unsigned int fd, struct file **res);
 140
 141long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
 142int chmod_common(const struct path *path, umode_t mode);
 143int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
 144                int flag);
 145int chown_common(const struct path *path, uid_t user, gid_t group);
 146extern int vfs_open(const struct path *, struct file *);
 147
 148/*
 149 * inode.c
 150 */
 151extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
 152extern void inode_add_lru(struct inode *inode);
 153extern int dentry_needs_remove_privs(struct dentry *dentry);
 154
 155/*
 156 * fs-writeback.c
 157 */
 158extern long get_nr_dirty_inodes(void);
 159extern int invalidate_inodes(struct super_block *, bool);
 160
 161/*
 162 * dcache.c
 163 */
 164extern int d_set_mounted(struct dentry *dentry);
 165extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
 166extern struct dentry *d_alloc_cursor(struct dentry *);
 167extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
 168extern char *simple_dname(struct dentry *, char *, int);
 169extern void dput_to_list(struct dentry *, struct list_head *);
 170extern void shrink_dentry_list(struct list_head *);
 171
 172/*
 173 * read_write.c
 174 */
 175extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
 176
 177/*
 178 * pipe.c
 179 */
 180extern const struct file_operations pipefifo_fops;
 181
 182/*
 183 * fs_pin.c
 184 */
 185extern void group_pin_kill(struct hlist_head *p);
 186extern void mnt_pin_kill(struct mount *m);
 187
 188/*
 189 * fs/nsfs.c
 190 */
 191extern const struct dentry_operations ns_dentry_operations;
 192
 193/* direct-io.c: */
 194int sb_init_dio_done_wq(struct super_block *sb);
 195
 196/*
 197 * fs/stat.c:
 198 */
 199int do_statx(int dfd, const char __user *filename, unsigned flags,
 200             unsigned int mask, struct statx __user *buffer);
 201
 202/*
 203 * fs/splice.c:
 204 */
 205long splice_file_to_pipe(struct file *in,
 206                         struct pipe_inode_info *opipe,
 207                         loff_t *offset,
 208                         size_t len, unsigned int flags);
 209