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
  26void emergency_thaw_bdev(struct super_block *sb);
  27#else
  28static inline void bdev_cache_init(void)
  29{
  30}
  31static inline int emergency_thaw_bdev(struct super_block *sb)
  32{
  33        return 0;
  34}
  35#endif /* CONFIG_BLOCK */
  36
  37/*
  38 * buffer.c
  39 */
  40int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
  41                get_block_t *get_block, const struct iomap *iomap);
  42
  43/*
  44 * char_dev.c
  45 */
  46extern void __init chrdev_init(void);
  47
  48/*
  49 * fs_context.c
  50 */
  51extern const struct fs_context_operations legacy_fs_context_ops;
  52extern int parse_monolithic_mount_data(struct fs_context *, void *);
  53extern void vfs_clean_context(struct fs_context *fc);
  54extern int finish_clean_context(struct fs_context *fc);
  55
  56/*
  57 * namei.c
  58 */
  59extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
  60                           struct path *path, struct path *root);
  61extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
  62                           const char *, unsigned int, struct path *);
  63int do_rmdir(int dfd, struct filename *name);
  64int do_unlinkat(int dfd, struct filename *name);
  65int may_linkat(struct user_namespace *mnt_userns, struct path *link);
  66int do_renameat2(int olddfd, struct filename *oldname, int newdfd,
  67                 struct filename *newname, unsigned int flags);
  68int do_mkdirat(int dfd, struct filename *name, umode_t mode);
  69int do_symlinkat(struct filename *from, int newdfd, struct filename *to);
  70int do_linkat(int olddfd, struct filename *old, int newdfd,
  71                        struct filename *new, int flags);
  72
  73/*
  74 * namespace.c
  75 */
  76extern struct vfsmount *lookup_mnt(const struct path *);
  77extern int finish_automount(struct vfsmount *, struct path *);
  78
  79extern int sb_prepare_remount_readonly(struct super_block *);
  80
  81extern void __init mnt_init(void);
  82
  83extern int __mnt_want_write_file(struct file *);
  84extern void __mnt_drop_write_file(struct file *);
  85
  86extern void dissolve_on_fput(struct vfsmount *);
  87
  88int path_mount(const char *dev_name, struct path *path,
  89                const char *type_page, unsigned long flags, void *data_page);
  90int path_umount(struct path *path, int flags);
  91
  92/*
  93 * fs_struct.c
  94 */
  95extern void chroot_fs_refs(const struct path *, const struct path *);
  96
  97/*
  98 * file_table.c
  99 */
 100extern struct file *alloc_empty_file(int, const struct cred *);
 101extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
 102
 103/*
 104 * super.c
 105 */
 106extern int reconfigure_super(struct fs_context *);
 107extern bool trylock_super(struct super_block *sb);
 108struct super_block *user_get_super(dev_t, bool excl);
 109void put_super(struct super_block *sb);
 110extern bool mount_capable(struct fs_context *);
 111
 112/*
 113 * open.c
 114 */
 115struct open_flags {
 116        int open_flag;
 117        umode_t mode;
 118        int acc_mode;
 119        int intent;
 120        int lookup_flags;
 121};
 122extern struct file *do_filp_open(int dfd, struct filename *pathname,
 123                const struct open_flags *op);
 124extern struct file *do_file_open_root(const struct path *,
 125                const char *, const struct open_flags *);
 126extern struct open_how build_open_how(int flags, umode_t mode);
 127extern int build_open_flags(const struct open_how *how, struct open_flags *op);
 128extern int __close_fd_get_file(unsigned int fd, struct file **res);
 129
 130long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
 131int chmod_common(const struct path *path, umode_t mode);
 132int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
 133                int flag);
 134int chown_common(const struct path *path, uid_t user, gid_t group);
 135extern int vfs_open(const struct path *, struct file *);
 136
 137/*
 138 * inode.c
 139 */
 140extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
 141extern int dentry_needs_remove_privs(struct dentry *dentry);
 142
 143/*
 144 * fs-writeback.c
 145 */
 146extern long get_nr_dirty_inodes(void);
 147extern int invalidate_inodes(struct super_block *, bool);
 148
 149/*
 150 * dcache.c
 151 */
 152extern int d_set_mounted(struct dentry *dentry);
 153extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
 154extern struct dentry *d_alloc_cursor(struct dentry *);
 155extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
 156extern char *simple_dname(struct dentry *, char *, int);
 157extern void dput_to_list(struct dentry *, struct list_head *);
 158extern void shrink_dentry_list(struct list_head *);
 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/* direct-io.c: */
 182int sb_init_dio_done_wq(struct super_block *sb);
 183
 184/*
 185 * fs/stat.c:
 186 */
 187int do_statx(int dfd, const char __user *filename, unsigned flags,
 188             unsigned int mask, struct statx __user *buffer);
 189
 190/*
 191 * fs/splice.c:
 192 */
 193long splice_file_to_pipe(struct file *in,
 194                         struct pipe_inode_info *opipe,
 195                         loff_t *offset,
 196                         size_t len, unsigned int flags);
 197