G8l: capability-insert writer-authority audit

pub const S278_WRITER_BOUNDARY_SITES: usize = 1;
pub const S278_WRITER_AUTHORITY_SITES: usize = 0;
pub const S278_DIRECT_SCHEDULER_ACCESS_SITES: usize = S277_DIRECT_SCHEDULER_ACCESS_SITES;
pub const S278_IMMUTABLE_READ_SITES: usize = S277_IMMUTABLE_READ_SITES;
pub const S278_WHOLE_SCHEDULER_GUARDED_SITES: usize = S277_WHOLE_SCHEDULER_GUARDED_SITES;
pub const S278_WHOLE_SCHEDULER_UNROUTED_SITES: usize = S277_WHOLE_SCHEDULER_UNROUTED_SITES;
pub const S278_OPEN_WRITER_SITES: usize = S277_OPEN_WRITER_SITES;

#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum G8lS278SchedulerWriterAuthorityAuditOutcome {
    Idle,
    AwaitingWriterAuthority {
        request_id: u64,
        guarded_sites: usize,
        writer_sites: usize,
    },
}

#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum G8lS278SchedulerWriterAuthorityAuditError {
    S277(G8lS277SchedulerWriterAuthorityAuditError),
    S245(G8lS245ExclusionAdmissionRequestError),
    PriorCoverageDrift {
        guarded_sites: usize,
        unrouted_sites: usize,
    },
}

/// Revalidate the prior fail-closed authority boundary without taking
/// admission or constructing a production exclusive wrapper.
pub fn preflight_s278_scheduler_writer_authority(
    caller_cpu: usize,
    request: Option<G8lS245WholeSchedulerExclusionAdmissionRequestView>,
) -> Result<G8lS278SchedulerWriterAuthorityAuditOutcome, G8lS278SchedulerWriterAuthorityAuditError>
{
    match preflight_s277_scheduler_writer_authority(caller_cpu, request)
        .map_err(G8lS278SchedulerWriterAuthorityAuditError::S277)?
    {
        G8lS277SchedulerWriterAuthorityAuditOutcome::Idle => {
            Ok(G8lS278SchedulerWriterAuthorityAuditOutcome::Idle)
        }
        G8lS277SchedulerWriterAuthorityAuditOutcome::AwaitingWriterAuthority {
            request_id,
            guarded_sites,
            writer_sites,
        } if guarded_sites == S278_WHOLE_SCHEDULER_GUARDED_SITES
            && writer_sites == S278_OPEN_WRITER_SITES =>
        {
            Ok(
                G8lS278SchedulerWriterAuthorityAuditOutcome::AwaitingWriterAuthority {
                    request_id,
                    guarded_sites,
                    writer_sites,
                },
            )
        }
        G8lS277SchedulerWriterAuthorityAuditOutcome::AwaitingWriterAuthority {
            guarded_sites,
            writer_sites: _,
            ..
        } => Err(
            G8lS278SchedulerWriterAuthorityAuditError::PriorCoverageDrift {
                guarded_sites,
                unrouted_sites: S278_DIRECT_SCHEDULER_ACCESS_SITES - guarded_sites,
            },
        ),
    }
}

#[test]
fn s278_keeps_capability_insert_writer_open_until_exclusive_authority_exists() {
    assert_eq!(S278_WRITER_BOUNDARY_SITES, 1);
    assert_eq!(S278_WRITER_AUTHORITY_SITES, 0);
    assert_eq!(S278_DIRECT_SCHEDULER_ACCESS_SITES, 113);
    assert_eq!(S278_IMMUTABLE_READ_SITES, 44);
    assert_eq!(S278_WHOLE_SCHEDULER_GUARDED_SITES, 44);
    assert_eq!(S278_WHOLE_SCHEDULER_UNROUTED_SITES, 69);
    assert_eq!(S278_OPEN_WRITER_SITES, 69);
}

  {
    id: "g8l-s278-capability-insert-writer-authority-audit-partial",
    date: "2026-08-26",
    sequence: 278,
    status: "passed",
    umbrella_status: "partial",
    title: "G8l: capability-insert writer-authority audit",
    summary:
      "S278 focused 15/15 PASS ile typed capability grant akışındaki insert_cap_for_task_under_ipc_transaction explicit scheduler writer sınırını kaynakta doğrular. Writer authority yalnız model gate'inin exclusive lease'iyle mümkündür; reader lease'i writer'ı açmaz. Whitespace/format bağımsız production inventory 113 direct / 44 immutable guarded / 69 open writer'dır; production exclusive wrapper, provider authority, whole-scheduler exclusion ve scheduler mutation üretilmez.",
    evidence: [
      "S278 focused kaynak/model kapısı iki bağımsız koşuda 15/15 PASS verdi: 130 B / SHA-256 0447f2fe9dc6fdf30815a6962cf23d978425e51bef2acde1efb27e5da13a78b3.",
      "insert_cap_for_task_under_ipc_transaction içindeki tek addr_of_mut!(SCHEDULER) writer boundary'si ve Capability forwarding'i kaynakta görünür; writer authority site sayısı 0, açık writer sayısı 69'dur.",
      "Model gate reader membership exclusive writer authority'yi ExclusiveBusy ile bloklar; reader bırakıldıktan sonra non-zero token'lı exclusive lease alınır. Bu host/model evidence'tır.",
      "S277 authority preflight yeniden doğrulanır; pending S245 request korunur ve sonuç AwaitingWriterAuthority { guarded_sites: 44, writer_sites: 69 } olarak döner.",
      "Üç AArch64 profil derlemesi exit 0 verdi; warning header'ları sırasıyla 291, 735 ve 735'tir. Bu zero-warning iddiası değildir.",
      "S238–S278 dependency matrisi iki koşuda 42 grup / 554/554 PASS; süre-normalize 5466 B özet byte-equal / SHA-256 63be741c2ed93b092cd5b089bfa376d4e4b8557391986ee829e0b63689226d8f.",
      "S278 production exclusive wrapper, provider authority, whole-scheduler exclusion, QEMU runtime fixture veya scheduler mutation iddiası eklemez; physical/device operations=0 ve RUNBOOK_EXECUTED_IN_S278=NO.",
    ],
    commands: [
      "cargo test --quiet -p aselsan_microkernel_simulation --test g8l_target_dispatch_scheduler_owner_scheduler_mutation_production_migration_lifecycle_s278_capability_insert_writer_authority_audit -- --test-threads=1",
      "cargo check --quiet -p aselsan_kernel --target aarch64-unknown-none --no-default-features --features board-qemu",
      "cargo check --quiet -p aselsan_kernel --target aarch64-unknown-none --no-default-features --features board-rpi5",
      "cargo check --quiet -p aselsan_kernel --target aarch64-unknown-none --no-default-features --features board-rpi5,smp",
    ],
    terminalSessions: [
      {
        id: "g8l-s278-capability-insert-writer-authority-audit",
        title: "G8l S278 capability-insert writer-authority audit",
        commandLines: [
          "cargo test --quiet -p aselsan_microkernel_simulation --test g8l_target_dispatch_scheduler_owner_scheduler_mutation_production_migration_lifecycle_s278_capability_insert_writer_authority_audit -- --test-threads=1",
        ],
        outputLines: [
          "test result: ok; S278 focused 1 group / 15 passed; 0 failed",
          "repeat-stable quiet output: 130 B / 0447f2fe9dc6fdf30815a6962cf23d978425e51bef2acde1efb27e5da13a78b3",
          "capability-insert writer authority remains model-only: reader blocks exclusive lease; 69 production writer sites remain open",
          "dependency: S238–S278 · 42 groups · 554/554 PASS; physical/device operations=0",
        ],
        exitCode: 0,
        outputMode: "selected",
      },
    ],
    terminalSessionsNote:
      "S278 kaynak/model fail-closed authority boundary'sidir; production writer guard, QEMU fixture mutation ve fiziksel/device execution claim edilmez.",
    limitations: [
      "S278 yalnız insert_cap_for_task_under_ipc_transaction writer boundary'sini audit eder; 69 production writer site açık kalır.",
      "Exclusive lease yalnız host/model gate'inde test edilir; production exclusive wrapper, provider authority ve whole-scheduler exclusion açık kalır.",
      "S238–S278 dependency matrisi 42 grup / 554/554 PASS'tir; bu production writer authority kanıtı değildir.",
      "Supported-profile runtime invocation, Generic SMP ve fiziksel RPi kabulü açık kalır; S278 physical/device operations=0 ve RUNBOOK_EXECUTED_IN_S278=NO.",
    ],
  },