xfs: validate inode numbers in file handles correctly

[Christoph Hellwig]

On Wed, Nov 23, 2011 at 01:04:58PM +0000, Guoquan Yang wrote:
> I meet with a problem when using 64bit XFS and NFS,
> 
> When I access a directory from the NFS client,I get Stale NFS file Handle 
> error.But it is ok when accessing on the server without NFS.
> 
> And I have checked that the inode num in the NFS file handle is the same as 
> inode num on the server, Using ls -il.
> 
> I found that XFS_IGET_UNTRUSTED in xfs_imap() filtered the function 
> xfs_imap_lookup(),It fails in xfs_imap_lookup() when access from NFS 
> client.local access does not go into xfs_imap_lookup().
> 
> My kernel is Linux2.6.35.6 from kernel.org. please help me to find out this 
> problem!

It seems like you hit the same issue hank peng reported recently, and
in facr your are on the same kernel for the serve as he is.