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Date:      Tue, 07 Jun 2022 04:51:38 +0000
From:      bugzilla-noreply@freebsd.org
To:        fs@FreeBSD.org
Subject:   [Bug 264174] Use of redaction bookmarks or redacted datasets on a boot pool renders the pool unbootable
Message-ID:  <bug-264174-3630-muD5Hnb5Cq@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-264174-3630@https.bugs.freebsd.org/bugzilla/>
References:  <bug-264174-3630@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D264174

--- Comment #2 from Eugene M. Kim <astralblue@gmail.com> ---
(In reply to Mark Johnston from comment #1)

Feature flags are tri-state:

* disabled - the feature cannot be used in the pool.
* enabled (but inactive) - the feature can be used, but is not currently in
use.
* active (implies enabled) - the feature can be used, and is in use.

The quoted piece of code prevents pools with redacted_datasets feature disa=
bled
from receiving redacted streams, whereas the bug is about receiving redacted
streams in a pool with the feature already enabled (but inactive), resultin=
g in
the feature state transitioning from enabled to active.

The boot loader rejects the pool if a non-whitelisted read-only-incompatible
feature is active; enabled is fine.

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