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From: Nicolai Stange <nstange@suse.de>
To: Tyler Fanelli <tfanelli@redhat.com>
Cc: Oliver Steffen <osteffen@redhat.com>,
	Stefano Garzarella <sgarzare@redhat.com>,
	coconut-svsm@lists.linux.dev
Subject: [DISCUSSION] svsm: attestation + CocoonFs:
Date: Wed, 11 Mar 2026 05:29:30 +0100	[thread overview]
Message-ID: <873427gf9x.fsf@> (raw)

Hi Tyler,

I've been told in one of the svsm devel calls that a capability for
storing some info in plaintext in CocoonFs would be helpful for your
attestation efforts.

Before I go and implement something, let me ask about the nature of that
data.
- What exactly are you planning to store there?
- Presumably the filesystem salt from the image header, supposed to also
  serve as a filesystem ID ([1]), is not sufficient?
- Is the data considered immutable over the lifetime of the FS?
- Is it Ok if that data is not authenticated?

Thanks!

Nicolai

[1] https://coconut-svsm.github.io/cocoon-tpm/cocoonfs/cocoonfs-format.html#image-header

             reply	other threads:[~2026-03-11  4:29 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-11  4:29 Nicolai Stange [this message]
2026-03-19 12:00 ` [DISCUSSION] svsm: attestation + CocoonFs: Arun Menon
2026-03-19 14:04   ` James Bottomley
2026-03-19 16:38     ` Tyler Fanelli
     [not found] <73724.126031100351500114@us-mta-457.us.mimecast.lan>
2026-03-20  3:22 ` Tyler Fanelli

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