Re: Ext2 Directory Index - File Structure

Andreas Dilger (adilger@turbolinux.com)
Sun, 15 Apr 2001 19:42:05 -0600 (MDT)

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 The kernel ext2_fs.h is out of date compared to the one in e2fsprogs.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
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