FROSADO / onecloudriver / 32080850087

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Build Type

push

github

Committed by web-flow

Commit Message

fix(fs): apply root-level delta changes (canonicalize the drive root ID) (#102)

* fix(fs): apply root-level delta changes (canonicalize the drive root ID)

Graph delta items reference the drive root by its real item ID (e.g.
"DF54...!sea8cc...") in parentReference, while the InodeCache stores the root
inode under graph.RootID ("root"). applyDelta's parent lookup therefore
missed and root-level changes (create/edit/delete/rename at the drive root)
were silently skipped as "parent not in cache" — in the mount's delta loop
and in the manual `onecloudriver sync` command (#73).

- delta.go: new resolveParentID maps the real root ID to "root" for the
  cache lookup. The real ID is learned at most once from (a) the delta root
  item itself when present in the cycle (free, no network), or (b) a lazy
  GetItem(root) on the first parent miss (sync.Once, fails gracefully, at
  most one extra call per DeltaSync lifetime) — so cycles carrying only a
  root-level edit (no root item) also apply.
- The delta root item now also refreshes the cached root's folder metadata
  (childCount) and persists it as dirty.
- Tests: applyDelta root-level new item (ID learned from the root item),
  root-level content change (ID learned via lazy GetItem), and an end-to-end
  pollAndApply cycle [root item, root-level file] (the #73 scenario). The
  BoundedMemory mock is now path-aware so the lazy GetItem
  (/me/drive/root) answers 404 without consuming a delta page slot. All
  three fail against the pre-fix code.

Closes #101

* test(fs): fix unsigned underflow in BoundedMemory heap measurement

Under -count=N -race the process heap can carry leftovers from previous
iterations, so the mid-sync peak can read lower than the baseline sampled
before it; peak - baseline then underflows to a gigantic uint64 and fails
spuriously. Use saturating subtraction. Caught by the Stress CI job
(race x10).

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