xfs and linux ino#s

[tes@xxxxxxxxxxxxxxxxxxxxxxx (Timothy Shimmin)]

Hi,

In xfsdump, the program builds an inode map 
(stores state of inode - needs to be dumped or not)
by doing a heap of bulkstats on the filesystem.
It also uses getdents/getdirentries to get the
dirent structures for the dir inodes.

The ino# returned from getdents in dirent structure
is a 32 bit linux ino# and the ino# used in bulkstat
is a 64 bit xfs ino#.
How do we map from xfs ino# to linux ino# and vice-versa ?
 
Thanks,
Tim.