On 2026/03/23 11:25, Renaud Allard wrote:
> 
> 
> On 3/23/26 11:20 AM, Robert Nagy wrote:
> > On 23/03/26 10:45 +0100, Claudio Jeker wrote:
> > > On Mon, Mar 23, 2026 at 08:32:43AM +0000, Stuart Henderson wrote:
> > > > On 2026/03/23 03:45, Thomas de Grivel wrote:
> > > > > I did check everything and it did look like ext2fs code with minor
> > > > > modifications that I fully understand to support ext4 extents and
> > > > > checksums it's not that big of a deal : ext4 is just ext2 with 64 bit,
> > > > > different checksums and extents tree walking.
> > > > 
> > > > Why standalone rather than done as diffs to ext2fs?
> > > > 
> > > 
> > > I wondered about the same. In general I would expect all of this be
> > > handled by one set of tools. Similar like we handle UFS and UFS2.
> > > I did not check myself but it seems the Internet thinks that dragonflybsd
> > > has ext2/3/4 support all backed into the ext2fs implementation which is
> > > probably close to ours. If that is true there may be a place where a lot
> > > of the code can be picked up.
> > 
> > The other question is the usefullness of this. Do we really need ext4 support
> > in base?
> 
> That's exactly the question I had in mind without daring to post it. Besides
> that, is ext2 actually useful either? Does it still have any practical use
> nowadays?

There aren't many filesystems with rw access on both Linux and OpenBSD
(IIUC FFSv2 is ro on Linux if it works at all) and of the ones which do
exist, this is a lot more unix-ish than FAT32...