Re: Ext2 Directory Index - File Structure

[Andreas Dilger <adilger@turbolinux.com>]

Daniel, you write:
> Andreas, you wrote:
> > We should go with "EXT2_FEATURE_COMPAT_DIR_INDEX 0x0008"
> > because the on-disk layout is 100% compatible with older kernels, so
> > no reason to force read-only for those systems.  I'm guessing Ted had
> > put RO_COMPAT_BTREE_DIR in there in anticipation, but it was never used.
> 
> By the way, did you mean:
> 
> 	#define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0002
> 
> since there is only one other COMPAT feature currently defined?

Quick note - you need to use 0x0008 or higher (Ted is the authority on
this).  The kernel ext2_fs.h is out of date compared to the one in e2fsprogs.
The EXT3_FEATURE_COMPAT_HAS_JOURNAL and EXT2_FEATURE_COMPAT_IMAGIC_INODES
is missing from the kernel header.

Cheers, Andreas
-- 
Andreas Dilger  \ "If a man ate a pound of pasta and a pound of antipasto,
                 \  would they cancel out, leaving him still hungry?"
http://www-mddsp.enel.ucalgary.ca/People/adilger/               -- Dogbert