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SubjectRe: LFS (2+GB) problems.
I am currently using the version of e2fsck that comes with redhat 6.1
e2fsck 1.15 is what it says. For ext2 fs v 0.5b.

Does this help?

On Fri, Feb 04, 2000 at 09:52:22AM -0700, Andreas Dilger wrote:
> You write:
> > Just resently I have started messing with the lfs facilities now
> > in place in the devel kernels and I have run into a few problems.
> >
> > Here are my problems:
> >
> > o I can create files larger than 4GB BUT I cannot remove them cleanly.
> > o On a reboot e2fsck truncates any file larger than 4GB to 4GB.
> >
> > Also... the first time I ran e2fsck it complained to me about having a large
> > file on the FS... It said I needed to turn on some flag in the superblock
> > (I cant remember the name) to enable LFS support... How do I turn it on
> > if e2fsck didnt already? What is the flag named? Is there any real docs
> > on how to set up LFS in linux? I cant seem to find any.
>
> You didn't mention if you installed a new e2fsprogs. The latest version
> is 1.18 I believe. However, looking through the ext2 code that I have
> (2.3.34 only), it does not set the EXT2_FEATURE_RO_COMPAT_LARGE_FILE flag
> in the superblock as far as I can see, so e2fsck probably has no chance to
> get it right anyways. If it isn't already in the recent kernel, you need
> something like the following in fs/ext2/inode.c:ext2_update_inode():
>
> if (S_ISDIR(inode->i_mode))
> raw_inode->i_dir_acl = cpu_to_le32(inode->u.ext2_i.i_dir_acl);
> | else {
> raw_inode->i_size_high = cpu_to_le32(inode->i_size >> 32);
> + if (raw_inode->i_size_high)
> + inode->i_sb->u.ext2_sb.s_feature_ro_compat |=
> + EXT2_FEATURE_RO_COMPAT_LARGE_FILE;
> + }
>
> I'm not 100% sure this is the right way to do it (not even sure that the
> syntax is correct), but at least it's a start... It seems likely that
> you may also need to have (in addition to or instead of the above):
>
> + inode->i_sb->u.ext2_sb.s_es->s_feature_ro_compat |=
> + EXT2_FEATURE_RO_COMPAT_LARGE_FILE;
> + mark_buffer_dirty(inode->i_sb->u.ext2_sb.s_sbh, 1);
> + inode->i_sb->s_dirt = 1;
>
> The latter will change the superblock on the disk - note the s_es in there,
> and it should be written out when it is marked dirty. It may also be
> nice to check if the flag is already set via EXT2_HAS_RO_COMPAT_FEATURE()
> so we don't write out the superblock for each update of a large file...
>
> 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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