Possible bug with FIBMAP

[Brice Arnould]

Hi

Two users of a hack I wrote told me that
http://vleu.net/shake/fb_r4.c (also attached with the mail)
returned "FIBMAP=-22, FIGETBSZ=4096"
on some of their files on reiser4 filesystems.

Does this value of "-22" have a special meaning (would be strange), or is it a 
bug in Reiser4 ?
I can ask them for more details, if you want.

Thanks
Brice

/*
 * Non released test software, distributed under GPL-2 licence by
 * Brice Arnould (c) 2006
 * You shouldn't use it.
 */
#include <stdio.h>
#include <assert.h>             // assert()
#include <errno.h>              // errno
#include <error.h>              // error()
#include <sys/ioctl.h>          // ioctl()
#include <linux/fs.h>           // FIBMAP, FIGETBSZ
#include <sys/types.h>          // open()
#include <sys/stat.h>           // open()
#include <fcntl.h>              // open()

int
main (int argc, char **argv)
{
  int fd, blocksize, block = 0;
  if (1 != argc)
    error (1, 0, "usage : %s FILE", argv[0]);
  fd = open (argv[1], O_RDONLY);
  assert (0 < fd);
  if (-1 == ioctl (fd, FIGETBSZ, &blocksize)
      || -1 == ioctl (fd, FIBMAP, &block))
    error (1, 0, "ioctl() failed, are you root ?\n");
  printf ("FIBMAP=%i, FIGETBSZ=%i\n", block, blocksize);
  close (fd);
}