matthew
4eca4104ce
Fixes the BU40N wedge cycle that has been chasing us through v0.13.18-20. Two changes, both backed by empirical live-hardware probes recorded in freemkv-private/docs/TEST_PLAN.md: 1. scsi/mod.rs: READ_TIMEOUT_MS 1500 → 10000 ms. Cold-start seek on the BU40N takes ~1.5 s. The old timeout cancelled normal reads at the boundary, triggering the kernel's ABORT/RESET escalation, which the Initio bridge couldn't drain — firmware-level wedge. 10 s catches every legitimate slow read (max successful ECC recovery: 2.6 s; cold-start: 1.5 s) with margin and short-circuits truly bad sectors at ~10 s. 2. disc/mod.rs: Disc::copy bisect-on-fail (replaces skip-forward). Live data showed the drive fails multi-sector READs in the bad zone but reads each sector cleanly when asked at bpt=1. Old skip-forward jumped 845 MB on the first multi-sector failure, marking everything in between as bad — losing clean territory sandwiched between bad sectors. New algorithm bisects: split the failed block in half, retry each half, recurse to single-sector reads. Sectors recoverable individually are picked up in Pass 1; only sectors that fail at bpt=1 are marked NonTrimmed for the patch passes. Stack-based DFS, log2(batch) = 6 levels for the default 60-sector batch. Multi-pass machinery is untouched. Pass 2..N walk the mapfile and become fast no-ops when bisect already recovered everything. Wedged-drive early-exit, 30 s settle, batch taper, F-R-F-R direction alternation — all preserved. New test: integration_progress_and_halt:: test_disc_copy_bisect_recovers_via_single_sector_reads — synthetic BU40N-pattern reader (multi-sector reads fail, single-sector succeed). Pre-patch: lost everything to skip-forward. Post-patch: 100 % bytes_good. Plus the 10 sense-key parser tests from the 0.13.20 test-coverage pass. Empirical recovery on Dune 2 UHD on the BU40N (per TEST_PLAN.md run log): old algorithm ~25 GB recovered + 6 GB skipped-forward and mostly lost; new algorithm projects ~99 % recovery in Pass 1. Audits + raw probe data: - freemkv-private/docs/TEST_PLAN.md (run log) - freemkv-private/docs/audits/2026-04-26-scsi-architecture-research.md
45 lines
1.1 KiB
TOML
45 lines
1.1 KiB
TOML
[package]
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name = "libfreemkv"
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version = "0.13.21"
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edition = "2024"
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rust-version = "1.86"
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license = "AGPL-3.0-only"
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description = "Open source raw disc access library for optical drives"
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repository = "https://github.com/freemkv/libfreemkv"
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keywords = ["bluray", "uhd", "optical", "scsi", "disc"]
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categories = ["hardware-support", "multimedia"]
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[dependencies]
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serde = { version = "1", features = ["derive"] }
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serde_json = "1"
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sha1 = "0.10"
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sha2 = "0.10"
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aes = "0.8"
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cbc = "0.1"
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flate2 = "1"
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num-bigint = "0.4"
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num-traits = "0.2"
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num-integer = "0.1"
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rand = "0.8"
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cmac = "0.7"
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zip = { version = "2", default-features = false, features = ["deflate"] }
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base64 = "0.22.1"
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# Trace-level instrumentation for Disc::copy + SgIoTransport::execute. Permitted
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# under CLAUDE.md ("Acceptable strings: debug/trace logging"). Consumers (autorip)
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# wire a tracing subscriber and pipe events into the JSONL debug log.
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tracing = "0.1"
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[target.'cfg(target_os = "linux")'.dependencies]
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libc = "0.2"
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[target.'cfg(target_os = "macos")'.dependencies]
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libc = "0.2"
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[dev-dependencies]
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tempfile = "3"
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[[bench]]
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name = "sgio_read"
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harness = false
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