v0.20.3: add halt check to Disc::patch backtrack inner loop

WO-5 (partial): the patch backtrack inner loop ('while bt_pos <
backtrack_end' in disc/patch.rs) issues per-sector reads to fill the
gap created by a damage-window skip. A long backtrack span can run
minutes; without an inline halt poll, the outer halt only takes
effect when control returns to the per-range loop. Adds a halt poll
at the top of each iteration so cancellation propagates inside the
backtrack span.

Per-sector read failures inside the backtrack already drop through
to the main fail path; this only changes the cancellation latency
between an /api/stop call and the producer actually unwinding. Drops
worst-case unwind from 'whole backtrack span × per-sector recovery
timeout' (minutes) to 'one in-flight SCSI command' (seconds).

The broader Arc<AtomicBool> → Halt migration on CopyOptions /
SweepOptions / PatchOptions / Drive::halt and Pipeline::send halt-
awareness is deferred — separate cycle, larger API impact.

This commit is contained in:

matthew

2026-05-13 11:55:52 -07:00

parent c9cede3759

commit b78b9e5cfd

2 changed files with 13 additions and 1 deletions

									
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				[package]

				name = "libfreemkv"

				version = "0.20.2"

				version = "0.20.3"

				edition = "2024"

				rust-version = "1.86"

				license = "AGPL-3.0-only"