feat: U2 UTRW slow path real branches
- slow_path.c: KEY_MISS -> PCKC re-derive (retry OK); EPOCH -> refresh cap epoch via out_cap (retry OK); STALE_CAP permanent; MAC_FAILED/POISONED -> PCKC invalidate + DRR fault report; RETRY passthrough - status.h: add UTSM_ERR_MAC_FAILED (-11); utrw.h: slow path takes cap/rights/offset/len/reason + out_cap - selftest: EPOCH refresh + KEY_MISS re-derive + POISONED passthrough coverage, full SELFTEST PASS in QEMU (.build_tmp/qemu_serial_u2slowpath.log)
This commit is contained in:
Linehu
@@ -172,8 +172,8 @@ kernel_api 已暴露能力：log, rsdp_address, fb_address/width/height/pitch/bp
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当前 manifest 中 14 个外部 `.drv` 均已替换为真实 DKM 驱动并可加载执行。
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下一阶段优先路线（活跃路线 = `docs/ROADMAP_INSANE.md` 五期填补计划，任务编号 F/U/D/R/E；状态唯一来源 = `docs/STATUS.md`）：
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1. **一期 F 系列剩余**: F2 统一帧缓冲控制台抽象、F3 跨平台构建（Make/CMake）。（F1 莲花 panic / F4 boot 分级自检 / F5 skip_firstinit 已完成）
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2. **二期 U 系列**: UTRW Slow Path 真分支（slow_path.c 当前为 stub）、@sealed 段标记、密文页 dump、selftest 修 chacha20 KAT 间歇 FAIL。
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1. **一期 F 系列收尾**: F2 统一控制台后端（fbcon.h 抽象已落，panic 已用）。（F1 莲花 panic / F3 跨平台 Makefile / F4 boot 分级自检 / F5 skip_firstinit 已完成）
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2. **二期 U 系列**: @sealed 段标记、密文页 dump、selftest 覆盖率提升（~~UTRW Slow Path 真分支~~ U2 已完成：EPOCH/KEY_MISS 恢复 + MAC_FAILED/POISONED→DRR，selftest PASS）。
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3. **三期 D 系列**: DKM 热卸载（引用计数）、裸机器码加载器、按名 API 导出表、彩色日志。
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4. **四期 R 系列收尾**: `drr_emergency_pool_kb`/`drr_recovery_log_size` 接线、segment/system 级回滚验证、PCQ per-cpu 多核。
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5. **五期 E 系列**: 启动莲花动画、假想时光键彩蛋、提交信息规范、风味 ISO。
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@@ -12,7 +12,8 @@ typedef enum {
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UTSM_ERR_KEY_MISS = -7,
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UTSM_ERR_STATE = -8,
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UTSM_ERR_POISONED = -9,
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UTSM_ERR_RETRY = -10
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UTSM_ERR_RETRY = -10,
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UTSM_ERR_MAC_FAILED = -11 /* U2: 页 MAC 校验失败（slow path 处置） */
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} utsm_status;
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#endif
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@@ -7,6 +7,12 @@
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int utsm_read(utsm_capability cap, u64 offset, void *dst, u64 len);
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int utsm_write(utsm_capability cap, u64 offset, const void *src, u64 len);
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int utsm_slow_path(int reason);
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/* U2: Slow Path —— Fast Path 失败后的恢复分支。
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* reason 为 Fast Path 返回的错误码；恢复成功返回 UTSM_OK（可重试），
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* EPOCH 场景经 out_cap 回传刷新后的凭证（可为 NULL）。
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* 其余返回值为不可恢复错误。 */
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int utsm_slow_path(utsm_capability cap, u32 rights, u64 offset, u64 len,
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int reason, utsm_capability *out_cap);
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#endif
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@@ -1,4 +1,5 @@
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#include <utsm/utsm.h>
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#include <utsm/pckc.h>
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#include <utsm/log.h>
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#include <utsm/segment.h>
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#include <utsm/arena.h>
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@@ -71,6 +72,53 @@ int utsm_selftest_run(void) {
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}
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log_info("[UTSM] selftest read ok");
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/* ==== U2: Slow Path 真分支（EPOCH 刷新 / KEY_MISS 重派生 / POISONED 拒绝） ==== */
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{
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/* 1) EPOCH 过期：伪造 stale cap（epoch=desc->key_epoch+1），slow path 应
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* 返回 OK 并回传刷新后的 cap，重试 read 应成功且内容一致 */
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utsm_capability stale = cap;
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stale.epoch = (u32)desc->key_epoch + 1;
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utsm_capability refreshed = stale;
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status = utsm_slow_path(stale, UTSM_RIGHT_READ, 128, len,
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UTSM_ERR_EPOCH, &refreshed);
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if (status != UTSM_OK) {
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log_error("[UTSM] selftest slow EPOCH recover failed");
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return status;
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}
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char slow_rb[64];
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status = utsm_read(refreshed, 128, slow_rb, len);
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if (status != UTSM_OK || memcmp(slow_rb, message, len) != 0) {
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log_error("[UTSM] selftest slow EPOCH retry read failed");
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return (status == UTSM_OK) ? UTSM_ERR_INVALID : status;
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}
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log_info("[UTSM] selftest slow EPOCH ok");
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/* 2) KEY_MISS：清掉该段 PCKC 缓存，slow path 重派生应返回 OK */
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utsm_pckc_invalidate_slot(cap.segment_slot);
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status = utsm_slow_path(refreshed, UTSM_RIGHT_READ, 128, len,
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UTSM_ERR_KEY_MISS, 0);
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if (status != UTSM_OK) {
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log_error("[UTSM] selftest slow KEY_MISS recover failed");
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return status;
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}
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status = utsm_read(refreshed, 128, slow_rb, len);
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if (status != UTSM_OK || memcmp(slow_rb, message, len) != 0) {
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log_error("[UTSM] selftest slow KEY_MISS retry read failed");
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return (status == UTSM_OK) ? UTSM_ERR_INVALID : status;
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}
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log_info("[UTSM] selftest slow KEY_MISS ok");
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/* 3) POISONED：不可恢复，原样返回；DRR fault 留痕不重启
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* （selftest 场景 drr_report_fault 只计数，无 reboot 语义） */
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status = utsm_slow_path(refreshed, UTSM_RIGHT_READ, 128, len,
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UTSM_ERR_POISONED, 0);
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if (status != UTSM_ERR_POISONED) {
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log_error("[UTSM] selftest slow POISONED passthrough failed");
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return UTSM_ERR_INVALID;
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}
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log_info("[UTSM] selftest slow POISONED ok");
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}
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/* ==== SCHED-1: O(1) runqueue 语义（合成 TCB，协作式，无 tick） ==== */
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/* ==== SCHED-1 + SCHED-2: runqueue / block-wake（tick 竞态保护） ==== */
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{
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@@ -3,9 +3,9 @@ test/utsm_selftest.o: test\utsm_selftest.c include\utsm\utsm.h \
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include\utsm\uuid.h include\utsm\process.h include\utsm\capability.h \
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include\utsm\segment.h include\utsm\dirty.h include\utsm\utrw.h \
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include\utsm\vmm.h include\utsm\linux_loader.h include\utsm\ipc_shm.h \
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..\utsm-ipc\ipc_proto.h include\utsm\hypercall.h include\utsm\log.h \
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include\utsm\arena.h include\utsm\drr.h include\utsm\sched_ext.h \
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include\utsm\sched.h
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..\utsm-ipc\ipc_proto.h include\utsm\hypercall.h include\utsm\pckc.h \
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include\utsm\crypto.h include\utsm\log.h include\utsm\arena.h \
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include\utsm\drr.h include\utsm\sched_ext.h include\utsm\sched.h
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include\utsm\utsm.h:
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include\utsm\types.h:
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include\utsm\status.h:
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@@ -21,6 +21,8 @@ include\utsm\linux_loader.h:
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include\utsm\ipc_shm.h:
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..\utsm-ipc\ipc_proto.h:
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include\utsm\hypercall.h:
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include\utsm\pckc.h:
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include\utsm\crypto.h:
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include\utsm\log.h:
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include\utsm\arena.h:
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include\utsm\drr.h:
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Binary file not shown.
@@ -1,5 +1,101 @@
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#include <utsm/utrw.h>
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#include <utsm/segment.h>
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#include <utsm/pckc.h>
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#include <utsm/drr.h>
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#include <utsm/log.h>
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int utsm_slow_path(int reason) {
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return reason;
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/* ===================================================================
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* U2: UTRW Slow Path 真分支
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*
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* "快柜空着，慢柜要你先念 UUID 咒语——念错也给你件，只是晚一拍。"
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*
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* Fast Path（read.c/write.c）失败后进入本分支，按 reason 分派：
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* KEY_MISS -> PCKC 重派生密钥，成功即 OK（可重试）
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* EPOCH -> 刷新 cap.epoch（out_cap 回传），OK（可重试）
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* STALE_CAP -> generation 不匹配，不可恢复，原样返回
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* MAC_FAILED -> PCKC 失效 + DRR fault（回滚路径接管），返回原错误
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* POISONED -> DRR fault 留痕，返回原错误（段已坏）
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* RETRY -> seqlock 忙，无恢复动作，返回 RETRY
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*
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* 返回 UTSM_OK 表示"已恢复，Fast Path 可立即重试"；
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* 其余返回值为不可恢复错误，调用方不得对同一 cap 继续访问。
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*
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* Slow 路径有审计日志（log_warn）——慢要慢得可解释。
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* =================================================================== */
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/* 轻量校验（绕过 epoch 检查）：EPOCH/KEY_MISS 恢复前确认段其余属性仍然合法 */
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static int slow_validate_ignoring_epoch(utsm_capability cap, u32 required_rights,
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u64 offset, u64 len,
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utsm_segment_desc **out_desc) {
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utsm_segment_desc *desc = utsm_get_segment(cap.segment_slot);
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if (!desc) return UTSM_ERR_INVALID;
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if (desc->state != UTSM_SEG_ACTIVE) {
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return (desc->state == UTSM_SEG_POISONED) ? UTSM_ERR_POISONED : UTSM_ERR_STATE;
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}
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if (desc->generation != cap.generation) return UTSM_ERR_STALE_CAP;
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if ((cap.rights & required_rights) != required_rights) return UTSM_ERR_ACCESS;
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if (offset > desc->cipher_length || len > desc->cipher_length ||
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offset + len > desc->cipher_length) return UTSM_ERR_BOUNDS;
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*out_desc = desc;
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return UTSM_OK;
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}
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int utsm_slow_path(utsm_capability cap, u32 rights, u64 offset, u64 len,
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int reason, utsm_capability *out_cap) {
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switch (reason) {
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case UTSM_ERR_KEY_MISS: {
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/* 咒语没背熟：PCKC 失效后重派生 */
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utsm_segment_desc *desc = NULL;
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int st = slow_validate_ignoring_epoch(cap, rights, offset, len, &desc);
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if (st != UTSM_OK) return st;
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utsm_pckc_invalidate_slot(cap.segment_slot);
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utsm_key_material key;
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st = utsm_pckc_get_or_derive(cap.segment_slot, desc, &key);
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if (st != UTSM_OK) {
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log_warn("[UTRW] slow: KEY_MISS re-derive failed");
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return st;
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}
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log_warn("[UTRW] slow: KEY_MISS -> key re-derived (retry)");
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return UTSM_OK;
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}
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case UTSM_ERR_EPOCH: {
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/* 纪元过期：cap.epoch 落后于段 key_epoch —— 刷新后可重试 */
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utsm_segment_desc *desc = NULL;
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int st = slow_validate_ignoring_epoch(cap, rights, offset, len, &desc);
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if (st != UTSM_OK) return st;
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if (out_cap) {
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*out_cap = cap;
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out_cap->epoch = (u32)desc->key_epoch;
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}
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log_warn("[UTRW] slow: EPOCH expired -> cap refreshed (retry)");
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return UTSM_OK;
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}
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case UTSM_ERR_STALE_CAP:
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/* generation 不匹配：凭证指向已销毁的段世代，不可恢复 */
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log_warn("[UTRW] slow: STALE_CAP -> permanent");
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return reason;
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case UTSM_ERR_MAC_FAILED:
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/* 页 MAC 校验失败：疑似静默损坏 —— 交 DRR（回滚）处置 */
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log_warn("[UTRW] slow: MAC_FAILED -> DRR fault reported");
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utsm_pckc_invalidate_slot(cap.segment_slot);
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drr_report_fault("utrw slow path: page MAC verification failed");
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return reason;
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case UTSM_ERR_POISONED:
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/* 段已中毒：留痕后原样拒绝 */
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log_warn("[UTRW] slow: POISONED -> DRR notified, access denied");
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drr_report_fault("utrw slow path: access to poisoned segment");
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return reason;
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case UTSM_ERR_RETRY:
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/* seqlock 忙（writer 正在写）：无恢复动作，调用方自旋重试 */
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return UTSM_ERR_RETRY;
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default:
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log_warn("[UTRW] slow: unhandled reason -> pass through");
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return reason;
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}
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}
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@@ -0,0 +1,17 @@
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utrw/slow_path.o: utrw\slow_path.c include\utsm\utrw.h \
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include\utsm\types.h include\utsm\status.h include\utsm\capability.h \
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include\utsm\segment.h include\utsm\uuid.h include\utsm\dirty.h \
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include\utsm\pckc.h include\utsm\config.h include\utsm\crypto.h \
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include\utsm\drr.h include\utsm\log.h
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include\utsm\utrw.h:
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include\utsm\types.h:
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include\utsm\status.h:
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include\utsm\capability.h:
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include\utsm\segment.h:
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include\utsm\uuid.h:
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include\utsm\dirty.h:
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include\utsm\pckc.h:
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include\utsm\config.h:
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include\utsm\crypto.h:
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include\utsm\drr.h:
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include\utsm\log.h:
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@@ -91,3 +91,5 @@ linux_lib_sync=1
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pe_dll_search=1
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@@ -91,3 +91,5 @@ linux_lib_sync=1
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pe_dll_search=1
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@@ -50,7 +50,7 @@ kernel_main() → serial_init → idt_init → arena_init(16MB) → dma_init(Lim
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## 3. 五大核心架构支柱
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> 每根支柱的**当前实现边界**：SAS-R0-PCQ — 调度器 BSP-only，per-cpu runqueue 结构就位未启用；任务加密上下文为结构预留。UTSM — 封缄段表/UUID ✅，加密原语 chacha20/KDF/BLAKE2b 已落，PCKC schedule 待接；全内存密文为设计意图，当前仅 selftest 路径覆盖。UTRW — Fast Path 真实现，Slow Path 为 stub。DRR — checkpoint/看门狗/Emergency Pool ✅（演示级），Emergency Pool 为编译期 64KB 静态池。DKM — 14 驱动能加载 ✅，无热卸载/无 capability/无符号版本协商。
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> 每根支柱的**当前实现边界**：SAS-R0-PCQ — 调度器 BSP-only，per-cpu runqueue 结构就位未启用；任务加密上下文为结构预留。UTSM — 封缄段表/UUID ✅，加密原语 chacha20/KDF/BLAKE2b 已落，PCKC schedule 待接；全内存密文为设计意图，当前仅 selftest 路径覆盖。UTRW — Fast Path 真实现，Slow Path 真分支（EPOCH/KEY_MISS 恢复、MAC_FAILED/POISONED 交 DRR）。DRR — checkpoint/看门狗/Emergency Pool ✅（演示级），Emergency Pool 为编译期 64KB 静态池。DKM — 14 驱动能加载 ✅，无热卸载/无 capability/无符号版本协商。
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### 3.1 SAS-R0-PCQ — 单地址空间Ring0调度模型
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@@ -43,7 +43,7 @@ Deshab 最标志性的疯点——给空气上锁。
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| 编号 | 功能 | 疯的意义 | 状态 | 实现要点 / 验收标准 |
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|------|------|---------|------|-------------------|
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| U1 | UTSM 元数据区（UUID 表） | 每页都有"身份" | ✅ | 封缄段表 + UUID 调谐已就位（`CODE/UTSM/core/segment.c`），可查询页归属 |
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| U2 | UTRW Fast/Slow Path 真分支 | 快慢路不是画出来的 | 🔶 | Fast path ✅（capability 校验→PCKC→line 解密→seqlock）；Slow path ⬜（当前 `utrw/slow_path.c` 为 stub） |
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| U2 | UTRW Fast/Slow Path 真分支 | 快慢路不是画出来的 | ✅ | Fast path ✅；Slow path ✅（EPOCH/KEY_MISS 恢复，MAC_FAILED/POISONED 交 DRR，selftest PASS） |
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| U3 | `@sealed` 段可选标记 | 用户能选锁不锁 | ⬜ | 链接脚本支持 `__sealed` section；未标记段 0 开销 |
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| U4 | 密文页 dump 工具 | 发疯也要可调试 | 🔶 | shell 可读内存；专用 dump 命令 + 明文/密文对照待做 |
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| U5 | UTSM selftest 全覆盖 | 把🔶刷成✅ | 🔶 | chacha20 KAT/段表/越界已覆盖，KAT 间歇 FAIL 待修；覆盖率目标 ≥70% |
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+1
-1
@@ -26,7 +26,7 @@
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|--------|------|----------|------|
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| 封缄段表 / UUID 调谐（U1） | ✅ | 段创建/查询闭环 | `CODE/UTSM/core/segment.c` |
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| UTRW Fast Path | ✅ | capability→PCKC→line 解密→seqlock | `utrw/read.c` |
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| UTRW Slow Path（U2） | ⬜ | `utrw/slow_path.c` 当前为 stub | — |
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| UTRW Slow Path（U2） | ✅ | EPOCH 刷新 / KEY_MISS 重派生 / POISONED+MAC_FAILED→DRR / STALE_CAP 拒绝；全分支 selftest PASS | `utrw/slow_path.c` + `.build_tmp/qemu_serial_u2slowpath.log` |
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| `@sealed` 段标记（U3） | ⬜ | 未实现 | — |
|
||||
| selftest（U5） | 🔶 | KAT/段表/越界已覆盖；chacha20 KAT 间歇 FAIL 待修 | `test/utsm_selftest.c` |
|
||||
| 真实加密原语 | 🔶 | chacha20/KDF/MAC 已落（Phase 9 早期），PCKC schedule 待接 | `crypto/` |
|
||||
|
||||
+1
-1
@@ -14,7 +14,7 @@
|
||||
## 🗝️ 二期：仪式（UTSM/UTRW）
|
||||
|
||||
- [x] U1 UTSM 元数据区 / UUID 调谐表
|
||||
- [ ] U2 UTRW Slow Path 真分支（Fast path ✅；slow_path.c 现为 stub）
|
||||
- [x] U2 UTRW Slow Path 真分支（EPOCH/KEY_MISS 恢复 + MAC_FAILED/POISONED→DRR；selftest PASS）
|
||||
- [ ] U3 `@sealed` 段可选标记（链接脚本 `__sealed` section）
|
||||
- [ ] U4 密文页 dump 工具（明文/密文对照命令）
|
||||
- [ ] U5 UTSM selftest 全覆盖（修 chacha20 KAT 间歇 FAIL，覆盖率 ≥70%）
|
||||
|
||||
Reference in New Issue
Block a user