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From: Chris Murphy <lists@colorremedies.com>
Date: Sun, 18 Dec 2016 13:12:26 -0700
Message-ID: <CAJCQCtRmmMc3QwhFA+kGqFPLc1_C4VpZ+Cei_cevncUJduTJmg@mail.gmail.com>
Subject: Re: [CORRUPTION FILESYSTEM] Corrupted and unrecoverable file system
 during the snapshot receive
To: Giuseppe Della Bianca <bepi@adria.it>
Cc: Btrfs BTRFS <linux-btrfs@vger.kernel.org>
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I'd say backup the volume conventionally to get important data
secured. Then use btrfs check --repair to fix the problems with the
file system, and then try the btrfs send receive again.

It most certainly is a bug, but it's not clear to me what the cause
is; other than the kernel isn't handling the problem on-disk
gracefully. Maybe repair will fix it. Another possibility is to move
to kernel 4.9.0 and see if it still reproduces. Per usual, there's a
ton of bug fixes in each kernel release.

Otherwise I'm out of ideas.

Chris Murphy