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§H.12 step 12: BMAPFMT field layout in blk_meta_t

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Replaced the old 40-byte owner_id/permissions/acl_block/signature[2]
with owner_fp[8]/acl_allow/acl_ttl (u32)/acl_reserved[3]/reserved_future,
matching the decided §F.4/§H.6 layout.

Found a pre-existing bug via a real offsetof/sizeof compile check
(not hand math, per this step's own instruction): sizeof(blk_meta_t)
was already 344, not the 341 its own BLK_META_PER_BLOCK constant and
"341-byte slice" comment claimed -- harmless since that constant has
zero callers anywhere. New size after this edit's own alignment
padding is 336. Added a _Static_assert matching blk_volume_meta_t's
existing precedent, and fixed the stale comment to point at it.
BLK_META_PER_BLOCK itself untouched -- unused, out of scope.

Verified 3-arch boot to ok> (amd64/aarch64/riscv64).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Robert Allan James
2026-09-03 07:18:41 -04:00
co-authored by Claude Opus 5
parent a268abe925
commit edd7effb5a
10 changed files with 27620 additions and 12 deletions
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capsules/BLOCK_MAP.md
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# Capsule Block Manifest — Auto-generated
<!-- Generated by mkcapsule --manifest 2026-09-03T10:43:13Z -->
<!-- Generated by mkcapsule --manifest 2026-09-03T11:16:49Z -->
<!-- DO NOT EDIT — re-run mkcapsule --manifest to refresh. -->
<!-- Hand-written justifications and immutability notes live -->
<!-- in MANIFEST.md alongside this auto-generated index. -->