linux-kernel - Re: [PATCH] btrfs: Allow read-only mount with corrupted extent tree

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Date:   Wed, 11 Aug 2021 16:41:02 -0400
From:   Josef Bacik <josef@...icpanda.com>
To:     Dāvis Mosāns <davispuh@...il.com>,
        linux-btrfs@...r.kernel.org
Cc:     Chris Mason <clm@...com>, David Sterba <dsterba@...e.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] btrfs: Allow read-only mount with corrupted extent tree

On 8/11/21 4:07 PM, Dāvis Mosāns wrote:
> Currently if there's any corruption at all in extent tree
> (eg. even single bit) then mounting will fail with:
> "failed to read block groups: -5" (-EIO)
> It happens because we immediately abort on first error when
> searching in extent tree for block groups.
> 
> Now with this patch if `ignorebadroots` option is specified
> then we handle such case and continue by removing already
> created block groups and creating dummy block groups.
> 

Already done and queue'ed up for the next release

btrfs: rescue: allow ibadroots to skip bad extent tree when reading block group 
items

thanks,

Josef