LXR linux/fs/hostfs/hostfs.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __UM_FS_HOSTFS
   3#define __UM_FS_HOSTFS
   4
   5#include <os.h>
   6
   7/*
   8 * These are exactly the same definitions as in fs.h, but the names are
   9 * changed so that this file can be included in both kernel and user files.
  10 */
  11
  12#define HOSTFS_ATTR_MODE        1
  13#define HOSTFS_ATTR_UID         2
  14#define HOSTFS_ATTR_GID         4
  15#define HOSTFS_ATTR_SIZE        8
  16#define HOSTFS_ATTR_ATIME       16
  17#define HOSTFS_ATTR_MTIME       32
  18#define HOSTFS_ATTR_CTIME       64
  19#define HOSTFS_ATTR_ATIME_SET   128
  20#define HOSTFS_ATTR_MTIME_SET   256
  21
  22/* This one is unused by hostfs. */
  23#define HOSTFS_ATTR_FORCE       512     /* Not a change, but a change it */
  24#define HOSTFS_ATTR_ATTR_FLAG   1024
  25
  26/*
  27 * If you are very careful, you'll notice that these two are missing:
  28 *
  29 * #define ATTR_KILL_SUID       2048
  30 * #define ATTR_KILL_SGID       4096
  31 *
  32 * and this is because they were added in 2.5 development.
  33 * Actually, they are not needed by most ->setattr() methods - they are set by
  34 * callers of notify_change() to notify that the setuid/setgid bits must be
  35 * dropped.
  36 * notify_change() will delete those flags, make sure attr->ia_valid & ATTR_MODE
  37 * is on, and remove the appropriate bits from attr->ia_mode (attr is a
  38 * "struct iattr *"). -BlaisorBlade
  39 */
  40struct hostfs_timespec {
  41        long long tv_sec;
  42        long long tv_nsec;
  43};
  44
  45struct hostfs_iattr {
  46        unsigned int            ia_valid;
  47        unsigned short          ia_mode;
  48        uid_t                   ia_uid;
  49        gid_t                   ia_gid;
  50        loff_t                  ia_size;
  51        struct hostfs_timespec  ia_atime;
  52        struct hostfs_timespec  ia_mtime;
  53        struct hostfs_timespec  ia_ctime;
  54};
  55
  56struct hostfs_stat {
  57        unsigned long long ino;
  58        unsigned int mode;
  59        unsigned int nlink;
  60        unsigned int uid;
  61        unsigned int gid;
  62        unsigned long long size;
  63        struct hostfs_timespec atime, mtime, ctime;
  64        unsigned int blksize;
  65        unsigned long long blocks;
  66        unsigned int maj;
  67        unsigned int min;
  68};
  69
  70extern int stat_file(const char *path, struct hostfs_stat *p, int fd);
  71extern int access_file(char *path, int r, int w, int x);
  72extern int open_file(char *path, int r, int w, int append);
  73extern void *open_dir(char *path, int *err_out);
  74extern void seek_dir(void *stream, unsigned long long pos);
  75extern char *read_dir(void *stream, unsigned long long *pos_out,
  76                      unsigned long long *ino_out, int *len_out,
  77                      unsigned int *type_out);
  78extern void close_file(void *stream);
  79extern int replace_file(int oldfd, int fd);
  80extern void close_dir(void *stream);
  81extern int read_file(int fd, unsigned long long *offset, char *buf, int len);
  82extern int write_file(int fd, unsigned long long *offset, const char *buf,
  83                      int len);
  84extern int lseek_file(int fd, long long offset, int whence);
  85extern int fsync_file(int fd, int datasync);
  86extern int file_create(char *name, int mode);
  87extern int set_attr(const char *file, struct hostfs_iattr *attrs, int fd);
  88extern int make_symlink(const char *from, const char *to);
  89extern int unlink_file(const char *file);
  90extern int do_mkdir(const char *file, int mode);
  91extern int hostfs_do_rmdir(const char *file);
  92extern int do_mknod(const char *file, int mode, unsigned int major,
  93                    unsigned int minor);
  94extern int link_file(const char *to, const char *from);
  95extern int hostfs_do_readlink(char *file, char *buf, int size);
  96extern int rename_file(char *from, char *to);
  97extern int rename2_file(char *from, char *to, unsigned int flags);
  98extern int do_statfs(char *root, long *bsize_out, long long *blocks_out,
  99                     long long *bfree_out, long long *bavail_out,
 100                     long long *files_out, long long *ffree_out,
 101                     void *fsid_out, int fsid_size, long *namelen_out);
 102
 103#endif
 104