--- IO-AIO/AIO.pm	2012/04/01 17:46:02	1.220
+++ IO-AIO/AIO.pm	2012/04/06 22:51:02	1.223
@@ -176,7 +176,7 @@
                      aio_stat aio_lstat aio_unlink aio_rmdir aio_readdir aio_readdirx
                      aio_scandir aio_symlink aio_readlink aio_realpath aio_sync
                      aio_fsync aio_syncfs aio_fdatasync aio_sync_file_range aio_fallocate
-                     aio_pathsync aio_readahead
+                     aio_pathsync aio_readahead aio_fiemap
                      aio_rename aio_link aio_move aio_copy aio_group
                      aio_nop aio_mknod aio_load aio_rmtree aio_mkdir aio_chown
                      aio_chmod aio_utime aio_truncate
@@ -415,7 +415,7 @@
 
 =item aio_seek $fh, $offset, $whence, $callback->($offs)
 
-Seeks the filehandle to the new C<$offset>, similarly to perl'S
+Seeks the filehandle to the new C<$offset>, similarly to perl's
 C<sysseek>. The C<$whence> can use the traditional values (C<0> for
 C<IO::AIO::SEEK_SET>, C<1> for C<IO::AIO::SEEK_CUR> or C<2> for
 C<IO::AIO::SEEK_END>).
@@ -1251,6 +1251,46 @@
 
    aio_mlockall IO::AIO::MCL_FUTURE;
 
+=item aio_fiemap $fh, $start, $length, $flags, $count, $cb->(\@extents)
+
+Queries the extents of the given file (by calling the Linux FIEMAP ioctl,
+see L<http://cvs.schmorp.de/IO-AIO/doc/fiemap.txt> for details). If the
+C<ioctl> is not available on your OS, then this rquiest will fail with
+C<ENOSYS>.
+
+C<$start> is the starting offset to query extents for, C<$length> is the
+size of the range to query - if it is C<undef>, then the whole file will
+be queried.
+
+C<$flags> is a combination of flags (C<IO::AIO::FIEMAP_FLAG_SYNC> or
+C<IO::AIO::FIEMAP_FLAG_XATTR> - C<IO::AIO::FIEMAP_FLAGS_COMPAT> is also
+exported), and is normally C<0> or C<IO::AIO::FIEMAP_FLAG_SYNC> to query
+the data portion.
+
+C<$count> is the maximum number of extent records to return. If it is
+C<undef>, then IO::AIO queries all extents of the file. As a very special
+case, if it is C<0>, then the callback receives the number of extents
+instead of the extents themselves.
+
+If an error occurs, the callback receives no arguments. The special
+C<errno> value C<IO::AIO::EBADR> is available to test for flag errors.
+
+Otherwise, the callback receives an array reference with extent
+structures. Each extent structure is an array reference itself, with the
+following members:
+
+   [$logical, $physical, $length, $flags]
+
+Flags is any combination of the following flag values (typically either C<0>
+or C<IO::AIO::FIEMAP_EXTENT_LAST>):
+
+C<IO::AIO::FIEMAP_EXTENT_LAST>, C<IO::AIO::FIEMAP_EXTENT_UNKNOWN>,
+C<IO::AIO::FIEMAP_EXTENT_DELALLOC>, C<IO::AIO::FIEMAP_EXTENT_ENCODED>,
+C<IO::AIO::FIEMAP_EXTENT_DATA_ENCRYPTED>, C<IO::AIO::FIEMAP_EXTENT_NOT_ALIGNED>,
+C<IO::AIO::FIEMAP_EXTENT_DATA_INLINE>, C<IO::AIO::FIEMAP_EXTENT_DATA_TAIL>,
+C<IO::AIO::FIEMAP_EXTENT_UNWRITTEN>, C<IO::AIO::FIEMAP_EXTENT_MERGED> or
+C<IO::AIO::FIEMAP_EXTENT_SHARED>.
+
 =item aio_group $callback->(...)
 
 This is a very special aio request: Instead of doing something, it is a