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freemkv: trim bus-off comment blocks to comment-guard caps

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This commit is contained in:
Matthew Jackson
2026-09-13 20:21:59 -07:00
parent 8533038e62
commit 32a41fe939
1 changed files with 9 additions and 13 deletions
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src/freemkv/mod.rs
+9 -13
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@@ -258,10 +258,9 @@ impl FreemkvUnlocker {
self.send_state(scsi, subfn::RAW_READ, RAW_READ_CERT_VALID)
}
// Raw Read (subfn 0x04) in RAW_READ_DATA_CLEAR (0x03) mode: remove AACS
// in-transit BUS encryption so content READ(10) returns the AACS-at-rest
// bytes unwrapped (the host applies title keys). Issued best-effort as the
// trailing step of full_unlock; inert on firmware without the 04 03 lever.
// Raw Read (subfn 0x04) mode 0x03 "data clear": remove AACS in-transit bus
// encryption so content READ(10) returns at-rest bytes unwrapped. Best-effort
// trailing step of full_unlock; inert without the 04 03 firmware lever.
fn set_bus_off(&self, scsi: &mut dyn ScsiTransport) -> std::result::Result<(), UnlockError> {
self.send_state(scsi, subfn::RAW_READ, RAW_READ_DATA_CLEAR)
}
@@ -289,10 +288,9 @@ impl FreemkvUnlocker {
}
}
// Full freemkv unlock sequence: 01 Identity (hard gate) → 03 Region → 02 Speed
// (best-effort) → 04 01 Raw Read → bare 0xAD VID (both load-bearing, no
// fallback) → 04 03 bus-off (trailing, fully best-effort). See
// docs/freemkv-abi.md for full failure-mode semantics.
// Full freemkv unlock: 01 Identity (hard gate) → 03 Region → 02 Speed (best-
// effort) → 04 01 Raw Read → bare 0xAD VID (load-bearing) → 04 03 bus-off
// (trailing, best-effort). See docs/freemkv-abi.md for failure-mode semantics.
fn full_unlock(
&self,
scsi: &mut dyn ScsiTransport,
@@ -341,11 +339,9 @@ impl FreemkvUnlocker {
// LD/Renesas routes). Raw Read already unlocked the drive, so a VID miss
// must not discard it: only a dead bus propagates (`?`), else `None`.
let vid = crate::vid::read_aacs_vid(scsi)?;
// 04 03 — Data Clear / bus-off: remove in-transit bus encryption so
// subsequent content READ(10)s return AACS-at-rest bytes unwrapped.
// Trailing (it repurposes flag[0x04] after the VID read) and FULLY
// best-effort — inert on firmware lacking the 04 03 lever, and a failure
// here (even a bus fault) must never discard an already-obtained unlock.
// 04 03 bus-off (trailing, repurposes flag[0x04] after the VID read):
// remove in-transit bus encryption. FULLY best-effort — inert without the
// lever, and a failure here never discards an already-obtained unlock.
if let Err(e) = self.set_bus_off(scsi) {
tracing::debug!(
target: "freemkv::disc",