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Date:      Fri, 14 Apr 2023 08:40:09 +0900
From:      Pawel Jakub Dawidek <pawel@dawidek.net>
To:        Cy Schubert <Cy.Schubert@cschubert.com>
Cc:        Mateusz Guzik <mjguzik@gmail.com>, Mark Millard <marklmi@yahoo.com>, vishwin@freebsd.org, dev-commits-src-main@freebsd.org, Current FreeBSD <freebsd-current@freebsd.org>, Shawn Webb <shawn.webb@hardenedbsd.org>
Subject:   Re: git: 2a58b312b62f - main - zfs: merge openzfs/zfs@431083f75
Message-ID:  <5e67bfbc-1e9c-432b-ac03-61839bd47e20@dawidek.net>
In-Reply-To: <060e8793-cca7-9301-57ac-9c73a187db3f@dawidek.net>
References:  <20230413071032.18BFF31F@slippy.cwsent.com> <D0D9BD06-C321-454C-A038-C55C63E0DD6B@dawidek.net> <20230413063321.60344b1f@cschubert.com> <CAGudoHG3rCx93gyJTmzTBnSe4fQ9=m4mBESWbKVWtAGRxen_4w@mail.gmail.com> <20230413135635.6B62F354@slippy.cwsent.com> <20230413140504.nnm23cjjv65mwzjr@mutt-hbsd> <060e8793-cca7-9301-57ac-9c73a187db3f@dawidek.net>

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On 4/14/23 07:36, Pawel Jakub Dawidek wrote:
> On 4/13/23 23:05, Shawn Webb wrote:
>> I've learned over the years downstream that it's not really my place
>> to tell upstream what to do or how to do it. However, I think given
>> the seriousness of this, upstream might do well to revert the commit
>> until a solid fix is in place. Upstream might want to consider the
>> impacts this is having not just with downstream projects, but also
>> regular users.
>>
>> Really bad timing to have a lot of new tax documentation that I really
>> don't want to lose. I'd really like to have an up-to-date, security
>> patched OS, but I guess I'll stay behind so that I don't risk losing
>> critical financial documentation.
> 
> Shawn,
> 
> I'm working on a patch to safely revert this that would also work for 
> people who already upgraded their pools.
> 
> I'm sorry for this mess.
> 

Here is the change that reverts most of the modifications and disables 
cloning new blocks. It does retain ability to free existing cloned 
blocks and keeps block_cloning feature around, so upgraded pools can be 
imported and existing cloned blocks freed.

It does not handle replaying ZIL with block-cloning logs, so make sure 
you import pools that were cleanly exported.

I'd appreciate if someone who can reproduce those corruptions could try it.

https://github.com/pjd/openzfs/commit/f2cfbcf76a733c44e25cba8c649162ef68047103

Thank you guys for your help!

-- 
Pawel Jakub Dawidek




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