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