orchestrator: Add the SvnFloor anti-rollback capability trait - #28
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chrysh wants to merge 3 commits into
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orchestrator: Add the SvnFloor anti-rollback capability trait#28chrysh wants to merge 3 commits into
chrysh wants to merge 3 commits into
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One device's durable SVN floor behind the capability seam: floor() and advance(), monotonic and idempotent so a replayed commit is harmless, durable when advance returns. Storage encoding (OTP fuse counters, protected flash) stays behind the trait; PLDM devices that commit internally simply have no eRoT-side floor. Trait only — the OTP-backed adapter and the driver's commit_svn_floor executor follow separately. Assisted-by: Claude:claude-fable-5 Signed-off-by: Christina Quast <christina.quast@9elements.com>
Per review: reading the floor does not require exclusive access. Assisted-by: Claude:claude-fable-5 Signed-off-by: Christina Quast <christina.quast@9elements.com>
The trait cannot enforce it: one-way encodings get it for free, any other storage must check itself. Assisted-by: Claude:claude-fable-5 Signed-off-by: Christina Quast <christina.quast@9elements.com>
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SvnFlooris the anti-rollback capability seam: one managed device's durable SVN floor.advance(to)is monotonic (at-or-below is anOkno-op) and durable on return; storage encoding (OTP fuses, protected flash, mocks) stays behind the trait.Trait only — implementations and the orchestrator commit path follow in separate PRs.
Part of #18