/* SPDX-License-Identifier: GPL-2.0 */

  #ifndef __UM_FS_HOSTFS
  #define __UM_FS_HOSTFS

  #include <os.h>

  /*
   * These are exactly the same definitions as in fs.h, but the names are

   * changed so that this file can be included in both kernel and user files.
   */
  
  #define HOSTFS_ATTR_MODE	1
  #define HOSTFS_ATTR_UID 	2
  #define HOSTFS_ATTR_GID 	4
  #define HOSTFS_ATTR_SIZE	8
  #define HOSTFS_ATTR_ATIME	16
  #define HOSTFS_ATTR_MTIME	32
  #define HOSTFS_ATTR_CTIME	64
  #define HOSTFS_ATTR_ATIME_SET	128
  #define HOSTFS_ATTR_MTIME_SET	256

  /* This one is unused by hostfs. */

  #define HOSTFS_ATTR_FORCE	512	/* Not a change, but a change it */
  #define HOSTFS_ATTR_ATTR_FLAG	1024

  /*
   * If you are very careful, you'll notice that these two are missing:

   *
   * #define ATTR_KILL_SUID	2048
   * #define ATTR_KILL_SGID	4096
   *

   * and this is because they were added in 2.5 development.

   * Actually, they are not needed by most ->setattr() methods - they are set by
   * callers of notify_change() to notify that the setuid/setgid bits must be
   * dropped.
   * notify_change() will delete those flags, make sure attr->ia_valid & ATTR_MODE
   * is on, and remove the appropriate bits from attr->ia_mode (attr is a
   * "struct iattr *"). -BlaisorBlade
   */

  struct hostfs_timespec {
  	long long tv_sec;
  	long long tv_nsec;
  };

  
  struct hostfs_iattr {

  	unsigned int		ia_valid;
  	unsigned short		ia_mode;
  	uid_t			ia_uid;
  	gid_t			ia_gid;
  	loff_t			ia_size;
  	struct hostfs_timespec	ia_atime;
  	struct hostfs_timespec	ia_mtime;
  	struct hostfs_timespec	ia_ctime;

  };

  struct hostfs_stat {
  	unsigned long long ino;
  	unsigned int mode;
  	unsigned int nlink;
  	unsigned int uid;
  	unsigned int gid;
  	unsigned long long size;

  	struct hostfs_timespec atime, mtime, ctime;

  	unsigned int blksize;
  	unsigned long long blocks;
  	unsigned int maj;
  	unsigned int min;
  };
  
  extern int stat_file(const char *path, struct hostfs_stat *p, int fd);

  extern int access_file(char *path, int r, int w, int x);
  extern int open_file(char *path, int r, int w, int append);

  extern void *open_dir(char *path, int *err_out);

  extern void seek_dir(void *stream, unsigned long long pos);
  extern char *read_dir(void *stream, unsigned long long *pos_out,

  		      unsigned long long *ino_out, int *len_out,
  		      unsigned int *type_out);

  extern void close_file(void *stream);

  extern int replace_file(int oldfd, int fd);

  extern void close_dir(void *stream);
  extern int read_file(int fd, unsigned long long *offset, char *buf, int len);
  extern int write_file(int fd, unsigned long long *offset, const char *buf,
  		      int len);
  extern int lseek_file(int fd, long long offset, int whence);

  extern int fsync_file(int fd, int datasync);

  extern int file_create(char *name, int mode);

  extern int set_attr(const char *file, struct hostfs_iattr *attrs, int fd);

  extern int make_symlink(const char *from, const char *to);
  extern int unlink_file(const char *file);
  extern int do_mkdir(const char *file, int mode);

  extern int hostfs_do_rmdir(const char *file);

  extern int do_mknod(const char *file, int mode, unsigned int major,
  		    unsigned int minor);

  extern int link_file(const char *to, const char *from);

  extern int hostfs_do_readlink(char *file, char *buf, int size);

  extern int rename_file(char *from, char *to);

  extern int rename2_file(char *from, char *to, unsigned int flags);

  extern int do_statfs(char *root, long *bsize_out, long long *blocks_out,
  		     long long *bfree_out, long long *bavail_out,
  		     long long *files_out, long long *ffree_out,

  		     void *fsid_out, int fsid_size, long *namelen_out);

  
  #endif