[Bug 264174] Use of redaction bookmarks or redacted datasets on a boot pool renders the pool unbootable

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264174

Mark Johnston <markj@FreeBSD.org> changed:

           What    |Removed                     |Added
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             Status|New                         |Open

--- Comment #1 from Mark Johnston <markj@FreeBSD.org> ---
I haven't yet attempted to reproduce this, but the described behaviour of
enabling a read-only-incompatible feature upon receiving a dataset sounds quite
wrong.

I do see the following in recv_begin_check_feature_flags_impl():

 543         /*
 544          * Receiving redacted streams requires that redacted datasets are
 545          * enabled.
 546          */
 547         if ((featureflags & DMU_BACKUP_FEATURE_REDACTED) &&
 548             !spa_feature_is_enabled(spa, SPA_FEATURE_REDACTED_DATASETS))
 549                 return (SET_ERROR(ENOTSUP));

so it seems that we are indeed checking this.  Perhaps that's not sufficient
somehow.

Of course, ideally we could handle these features in the loader.

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