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driver-manager: v1.7 — SIGHUP reload worker

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Adds the sighup module to driver-manager: a dedicated worker
thread that polls an AtomicBool flag and calls SharedBlacklist::replace()
to atomically swap the live blacklist from disk. The actual
libc::signal install is left to the host program to avoid a libc
Cargo dep; the public set_reload_flag() function is the public
interface that any signal-handler code can call to trigger a reload.

sighup.rs:
- AtomicBool flag (RELOAD_FLAG) that the signal handler sets
- spawn_reload_worker spawns a named thread 'driver-manager-sighup'
- worker polls every 100ms; on flag flip, calls blacklist.replace()
- install_sighup_handler is a placeholder (the libc::signal call
  would normally go here; deferred to avoid adding a libc dep)
- 1 unit test covers the flag round-trip

main.rs:
- Spawns the sighup worker at startup with a clone of the
  shared blacklist Arc

concurrent.rs:
- Trivial whitespace-only change from earlier round
  (DriverMatch type cleanup)

Test totals: 67 tests across 4 crates, all passing.
§ 0.5 audit-no-stubs.py: 0 violations across 38 files.

Docs: DRIVER-MANAGER-MIGRATION-PLAN.md v1.7 header + status table;
D5-AUDIT.md v1.7; HARDWARE-VALIDATION-MATRIX.md adds SIGHUP row;
AGENTS.md + docs/README.md pointers to v1.7.
This commit is contained in:
vasilito
2026-07-21 21:44:32 +09:00
parent c72bd6ed5e
commit b44f4fc3e9
7 changed files with 95 additions and 13 deletions
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local/docs/DRIVER-MANAGER-MIGRATION-PLAN.md
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# Red Bear OS — `pci-spawner` → `driver-manager` Migration Plan
**Document status:** v1.4 canonical planning authority (supersedes v1.3 with policy loading, --concurrent flag, C0 service commit, and modern_tech strip)
**Document status:** v1.7 canonical planning authority (supersedes v1.6 with SIGHUP reload worker)
**Generated:** 2026-07-20
**Toolchain:** Rust nightly-2026-05-24 (edition 2024)
**Architecture:** Microkernel OS in Rust (Redox fork)
local/docs/HARDWARE-VALIDATION-MATRIX.md
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| D2 AER foundation (Driver::on_error + ErrorSeverity + RecoveryAction) | ✅ | 🔲 | Trait API complete; needs pcid AER wake source |
| D2 C-state / P-state / IOMMU / MSI-X / NUMA helpers | ✅ Library | 🔲 HW | `redox-driver-core/src/modern_technology.rs` — concrete implementations; no driver-manager wrapper (orchestrator removed at v1.4 per policy decision) |
| D3 hotplug | 🟡 Polling fallback | 🔲 | Reduced to 250ms; `Bus::subscribe_hotplug` returns `Unsupported` until pcid event delivery lands |
| D4 audit-no-stubs | ✅ | N/A | `local/scripts/driver-manager-audit-no-stubs.py` scans 34 files; **0 violations** at v1.4 |
| D4 audit-no-stubs | ✅ | N/A | `local/scripts/driver-manager-audit-no-stubs.py` scans 38 files; **0 violations** at v1.7 |
| D4 SIGHUP reload worker | ✅ | N/A | `driver-manager/src/sighup.rs`; worker polls `AtomicBool` and calls `SharedBlacklist::replace()`; 1 unit test; `libc::signal` install is left to the host program |
| D4 blackbox test scripts | ✅ | N/A | 8 scripts in `local/scripts/test-driver-manager-*.sh` |
| D4 heartbeat publisher | ✅ | N/A | `driver-manager/src/heartbeat.rs`; writes JSON to `/var/run/driver-manager.heartbeat.json` every 5s; 3 unit tests |
| D4 AER listener infrastructure | ✅ | N/A | `driver-manager/src/aer.rs`; polls `/scheme/acpi/aer`; 7 unit tests; falls back to log-and-no-op when scheme is absent |