No go from me either. Older macs may not be able to read HFS+ /boot. Also HFS+ presents couple of problems the biggest one is that in case of sudden reboot HFS+ often needs to be mounted by OSX or cleaning dirty flag manually before it becomes writeable.
> On Aug 19, 2022, at 3:59 PM, Daniel Kiper <dkiper@net-space.pl> wrote:
>
> On Fri, Aug 19, 2022 at 11:38:26PM +1000, Daniel Axtens wrote:
>> HFS is so so very old now. According to Wikipedia, HFS was
>> introduced in 1985 and the successor HFS+ came out in January
>> 1998. Mac OS dropped support for writing HFS in 2009 and dropped
>> support for reading HFS in 2019 with macOS 10.15.
>>
>> Grub's support for it doesn't survive contact with a fuzzer, and
>> the issues involve some horrible mess of mutual recursion that
>> would be time-consuming to sort out.
>>
>> HFS has been disabled under lockdown since commit 1c15848838d9
>> ("fs/hfs: Disable under lockdown") which was part of an earlier
>> spin of security fixes.
>>
>> I think it's time to consign HFS to the dustbin of history. It's
>> firmly in the category of retrocomputing at this stage.
>>
>> This should not affect HFS+.
>>
>> There's a little bit of mess remaining: the macbless runtime
>> command and HFS+ need the HFS headers for embedded volume support.
>> I don't think that's really deployed any more, as it would have
>> been part of the HFS->HFS+ transition, but I'm not really game to
>> mess with either, in particular as macbless writes(!) to disk live.
>> (I'm fairly sure the grub-macbless tool invokes code from the
>> macbless module as well.)
>>
>> Signed-off-by: Daniel Axtens <dja@axtens.net>
>
> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
>
> Daniel, thank you for preparing this patch!
>
> If I do not hear any major objections in the following weeks I will
> merge this patch or a variant of it in the second half of September.
We’re still formatting our /boot partitions for Debian PowerPC for PowerMacs using HFS, so this change would be a breaking change for us.
So, that would be a no from Debian’s side.
Adrian
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