Commit Graph

371 Commits

Author SHA1 Message Date
Edouard Vanbelle f7deb7aaf4 fix(authz): invalidate role cache on change 2026-07-06 23:07:49 +02:00
Edouard Vanbelle 79f4792709 fix(quota): pre-check quota for COPY/MOVE
check qouta for a cross drive MOVE
    check quota for a COPY
2026-07-06 22:14:50 +02:00
Edouard Vanbelle 7e34045ff8 feat(drive): fix webdav back-compat
add env variable `OXICLOUD_WEBDAV_DRIVE_LISTING_PREFIX`
    which is by default:
    `OXICLOUD_WEBDAV_DRIVE_LISTING_PREFIX="@drive"`

    so `/webdav/` -> points to user's personal drive (**backward compatibilit**y)
    `/web/dav/@drive/{uuid|drive name}/` points to the respective drive

    if admins want directly `/webdav/` pointing to list of drives they need to:
    `OXICLOUD_WEBDAV_DRIVE_LISTING_PREFIX=""`

    + ensure lock is per user (RFC 4918 §9.11)

    fix: #554
2026-07-06 22:14:50 +02:00
Edouard Vanbelle 1786fe4111 security(nextcloud): chroot-aware display paths + recent race fix
strip_chroot_prefix replaces the hardcoded "Personal/" strip
    in NC trashbin PROPFIND, OCS unified search, and REPORT
    (favorites + search). Handles composed chroots, drops
    cross-chroot items instead of surfacing malformed paths, and
    fixes the leading-slash mismatch (FolderDto path has '/', DB
    paths don't) that silently dropped every NC trashbin item
    post-D3. OCS keeps a first-segment fallback (results
    legitimately span drives, no single chroot).

    uploads_handler switches to nc_to_internal_path(chroot, …)
    for the two remaining hardcoded "Personal/" sites, closing
    the D1 TODO markers.

    RecentService::record_item_access is split from a new
    record_item_access_internal (no authz) used by
    RecentRecordingHook. Round 1's authz.require widened the
    tokio::spawn race past tests/api/recent.hurl step 7; the
    internal path skips the redundant Read gate — upstream
    _with_perms already enforced it.

    Tests: 8 unit tests pin strip_chroot_prefix (leading slash,
    composed chroots, sibling-leak rejection, partial-prefix,
    empty-chroot). drives_membership.hurl step 21b/22b cover
    Editor upload → 201 / Viewer upload → 404 fresh + overwrite
    with fixture cleanup at 30c. test_nc_move_copy_delete_trash
    K1 pins the actual original-location value.
2026-07-05 22:53:05 +02:00
Edouard Vanbelle f115fed5a6 feat(drive): cleanup of useless owner_id 2026-07-05 22:53:05 +02:00
Edouard Vanbelle 92d1a10d45 security(quick-xml): bump version to 0.41.0
- and protect amount of properties
 - azure_core 0.21.0 is using quick-xml 0.31.0  which is Dos-able
   azure_core is no more maintained, would migrte to official azure lib
   later
2026-07-03 02:12:36 +02:00
Edouard Vanbelle dff0e7365e feat(drive): remove all user_id ref in file or folder 2026-07-03 02:12:32 +02:00
Edouard Vanbelle 37467ed9d3 feat(drive): remove all owner_id from {File,Folder}Dto 2026-07-03 01:13:53 +02:00
Edouard Vanbelle 206a780494 feat(drive): stop writing in {file,folder}.user_id
plan:

    ```
    What step 5 is actually doing

    Goal: stop writing to storage.files.user_id / storage.folders.user_id on new INSERTs. This is a prerequisite for step 6 (dropping the column entirely). The column has existed since the pre-D0 single-owner era; every read that used to key on it has already been migrated to drive-membership grants over the last N days.

    What has to change together for this to be safe:

    ┌──────────────┬─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┬───────────────────────────────────────────────────────────────────────────────────────────────────────┐
    │    Piece     │                                                          What changes                                                           │                                                  Why                                                  │
    ├──────────────┼─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┼───────────────────────────────────────────────────────────────────────────────────────────────────────┤
    │ Migration    │ Swap storage.files uniqueness indexes from (folder_id, name, user_id) to (drive_id, folder_id, name)                            │ Otherwise, two new rows with user_id = NULL would both be allowed (PG treats NULLs as distinct) —     │
    │ (a)          │                                                                                                                                 │ uniqueness silently breaks                                                                            │
    ├──────────────┼─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┼───────────────────────────────────────────────────────────────────────────────────────────────────────┤
    │ Migration    │ ALTER user_id DROP NOT NULL on both tables                                                                                      │ Otherwise, dropping the INSERT bind violates NOT NULL and every write 500s                            │
    │ (b)          │                                                                                                                                 │                                                                                                       │
    ├──────────────┼─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┼───────────────────────────────────────────────────────────────────────────────────────────────────────┤
    │ Migration    │ Drop dead user_id-leading indexes                                                                                               │ Cheap cleanup — nothing scans them anymore                                                            │
    │ (c)          │                                                                                                                                 │                                                                                                       │
    ├──────────────┼─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┼───────────────────────────────────────────────────────────────────────────────────────────────────────┤
    │ PL/pgSQL (d) │ Rewrite storage.copy_folder_tree without user_id in the INSERT column list                                                      │ Cross-drive copy runs entirely in SQL, needs the same treatment                                       │
    ├──────────────┼─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┼───────────────────────────────────────────────────────────────────────────────────────────────────────┤
    │ Rust (e)     │ ~12 INSERT column-list drops across folder_db_repository, file_blob_write_repository, drive_pg_repository, dedup_service,       │ Actual write path                                                                                     │
    │              │ folder_service, load-seed.rs                                                                                                    │                                                                                                       │
    ├──────────────┼─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┼───────────────────────────────────────────────────────────────────────────────────────────────────────┤
    │ Rust (f)     │ Simplify folder_db_repository::create_folder's parent lookup to only fetch drive_id (was fetching (user_id, drive_id))          │ It's fetching a value it no longer needs                                                              │
    └──────────────┴─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┴───────────────────────────────────────────────────────────────────────────────────────────────────────┘
    ```
2026-07-03 00:23:35 +02:00
Edouard Vanbelle 25dcab8e85 feat(drive): dedup service move user_id to authz 2026-07-02 21:10:12 +02:00
Edouard Vanbelle 91435e6be1 feat(drive): webdav handler based on drive
and add authz
2026-07-02 20:41:33 +02:00
Edouard Vanbelle f5f5b1167f feat(drive): remove _for_owner() and use authz
remove related IDOR protection as Hurl tests are covering this surface
2026-07-02 01:14:02 +02:00
Edouard Vanbelle 09790644f3 feat(drive): repl user_id by caller has read access
repl user_id by caller has read access in readonly functions
    using CALLER_CAN_READ_DRIVE constant

    ensure webdav preview is using the permission handler
2026-07-02 01:03:39 +02:00
Edouard Vanbelle 79bc60899b feat(drive): improvepermission check and simplify functions 2026-07-02 00:29:33 +02:00
Edouard Vanbelle 858139ef3b feat(drive): prepare removal of user_id
this commit changes GET /api/<resources> to return resource caller has access to
    this is not anymmore resources users is owner of
2026-07-02 00:01:20 +02:00
Edouard Vanbelle 01ff7dab0b feat(drive): impl policy photo + music policies
add `include_in_photo_index` and `include_in_music_index` policies
    both true for default personal drive

    photo is implemented
    music is not yet implemented
2026-07-01 21:57:37 +02:00
Edouard Vanbelle d8adae3572 feat(dead-props): ensure replication on copy 2026-06-30 23:48:44 +02:00
Edouard Vanbelle cb7b653a15 feat(webdav): bind dead prop to res. id rather path 2026-06-30 23:35:25 +02:00
Edouard Vanbelle 5631b7e062 fix(sql macro): permit code to compile 2026-06-30 19:46:19 +02:00
M.Schmidt b5afa1a855 feat(webdav): implement RFC 4918 dead property store
Add an in-memory DeadPropertyStore backed by RwLock<HashMap> that
stores arbitrary client-supplied XML properties per resource path.
Wire it into AppState so PROPPATCH can persist dead props and PROPFIND
can retrieve them across requests.
2026-06-26 21:19:03 +02:00
M.Schmidt f9999cdd0f fix(webdav): RFC 4918 litmus compliance 2026-06-22 21:37:14 +02:00
Edouard Vanbelle 583af517c2 fix(drive): fix drive_id on copy to other drive
- fix alsot drive_id exposition
2026-06-29 23:21:17 +02:00
Edouard Vanbelle ee92d365b9 feat(drive): ensure drive_id updated on file|folder moved to another drive 2026-06-29 21:11:40 +02:00
Edouard Vanbelle 324fcd486f fix(oidc): fix user's picture copy when OIDC login 2026-06-28 23:20:02 +02:00
Edouard Vanbelle 66f2aaa250 feat(drive): add drive policie
- add policy forbid_external_sharing
    - add policy forbid_sharing
    - add polocy forbid_cross_drive_move
    - add policy forbid_owner_role_change
2026-06-26 14:04:36 +02:00
Edouard Vanbelle ddb131da8b feat(drive): add policy forbid_public_links 2026-06-26 13:59:02 +02:00
Dionisio Pozo 996ace8a1d Merge pull request #524 from EdouardVanbelle/fix/cascading-deletion-and-file-life-cycle
fix(fileLifeCycle): add missing on_file_deleted() with cascading deletion
2026-06-26 12:35:25 +02:00
Edouard Vanbelle f4032e9e23 feat(recent): update recent list server side
initially the recent was done client side
    recent files are now directly updated on serverside when accessing a file

    note: nextcloud and webdav voluntary not included
2026-06-26 01:44:19 +02:00
Edouard Vanbelle fefba83cfc fix(fileLifeCycle): add missing on_file_deleted with cascading del
on_file_deleted() was missing on folder deletion or on cascading deletion
2026-06-25 23:36:50 +02:00
Edouard Vanbelle 81d50bde33 fix(GC): race condition in dedup_service
Stamp `orphaned_at = now()` on the ref-0 row so it sits inside the
     GC grace window for the duration of this test. Without it,
     `orphaned_at IS NULL` is treated by `garbage_collect` as
     "pre-migration, immediately reapable" — and any sibling test in
     the shared pool that calls `garbage_collect()` (e.g.
     `garbage_collect_respects_grace_and_cross_checks`) would race
     with the pin below and delete the row first.
2026-06-25 19:00:19 +02:00
Edouard Vanbelle 2604ac3309 refactor: format syntaxt 2026-06-25 00:07:16 +02:00
Edouard Vanbelle 8387473b26 bigfix(gc): fix leak with GC and blob lifecycle
call fire_blob_hooks to respect lifecycle

    dedup_service::garbage_collect_with_grac must call fire_blob_hooks() once blob are dropped
    so other services like thumbnail can proceed to their cleanup
2026-06-24 23:51:25 +02:00
Edouard Vanbelle 90474aa885 chore(test): blob lifecyclc with thumbnail cleanup
renable thumbnail test, ensure that blob lifecycle correctly
    trigger thumbnail cleanup on blob deletion

    need to call `/api/admin/internal/trigger-gc?force=true`
2026-06-24 23:50:37 +02:00
Edouard Vanbelle 7d24015fc4 feat(drive): add drive deletion
- conditions: drive must be empty
    - deletion forbidden on main personal drive
2026-06-24 21:17:27 +02:00
Edouard Vanbelle 754e6239da fix(drive): correct integration test 2026-06-24 08:02:40 +02:00
Edouard Vanbelle d77846119f feat(drive): UI: add drive edition for admin 2026-06-24 01:20:44 +02:00
Edouard Vanbelle a5b24a7453 feat(drive): add /api/drive
- permit shared drive creation from oxicloud admin (for now)
    - prepare other personal drive creation (Not implemented), need to validate
    quota policies and strategy first
    - add hurl test to verify permissions
2026-06-23 23:50:57 +02:00
Edouard Vanbelle 184520c17a feat(drive): plug trash to drives 2026-06-23 22:04:20 +02:00
Edouard Vanbelle 4eb9707774 feat(drive): check user grants on drive
use drive's grant whant handling a file or folder
2026-06-23 20:26:31 +02:00
Edouard Vanbelle 2fe9c9ffeb feat(drive): tell UI the caller role per Drive 2026-06-23 00:09:18 +02:00
Edouard Vanbelle a82bae4136 feat(drive): api to handle Drive grants 2026-06-22 23:53:00 +02:00
Claude 601fbdedf9 Revert "perf(blob): one syscall per new chunk in write_blob_bytes"
This reverts ee51b32. The create_new change showed no measurable throughput
benefit — three 9-rep interleaved runs on the same ext4 device swung −12%..+21%
at the 256 KiB CDC size (a negative stat on a warm dentry cache is ~µs, below
the shared-disk noise floor). Applying the same "no change without a measured
win" bar used for the pool-sizing revert: the idiom/TOCTOU angle is real but the
race is already prevented upstream by the PG pin-or-classify serialisation, so
it's defence-in-depth only — not enough to keep an unmeasured change. Reverts
the production change, the bench, and its doc together.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JG5yYZ9s868mJwqT2Qz7ez
2026-06-22 09:42:37 +00:00
Claude ee51b32ba9 perf(blob): one syscall per new chunk in write_blob_bytes (create_new)
Replace the try_exists(stat) + File::create(O_CREAT|O_TRUNC) pair with a single
OpenOptions::create_new (O_CREAT|O_EXCL), treating AlreadyExists as the existing
idempotent skip. One metadata syscall per new chunk instead of two (each a
spawn_blocking round-trip), and O_EXCL closes the check-then-create TOCTOU the
old pair left open (a racing writer could be truncated).

Honest measurement caveat (benches/BLOB-WRITE.md): the wall-clock throughput
effect is BELOW the noise floor of the test environment — three 9-rep
interleaved runs on the same ext4 device swing −12%..+21% at the 256 KiB CDC
size, because a negative stat on a warm dentry cache is ~µs, dwarfed by the
chunk's create+write+flush. So this is justified as a code-quality / correctness
change (canonical idiom, strictly fewer syscalls, closes a TOCTOU, zero
downside), NOT as a benchmarked perf win.

The sibling idea — reusing the File handle for the fsync sweep — is deliberately
NOT done: sync_blobs is a single end-of-stream sweep over all the upload's new
hashes, so retaining handles would hold thousands of FDs open (>ulimit) on a
large upload. The re-open sweep is a deliberate FD-frugal design.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JG5yYZ9s868mJwqT2Qz7ez
2026-06-22 09:40:57 +00:00
Claude 18781022be Revert "perf(pools): size image/rayon pools to the CFS quota"
This reverts the image-pool migration (commit 5629ba6). The bench
(bench_pool_concurrency / POOL-CONCURRENCY.md) measured the one pool it could
isolate — the thumbnail decode semaphore — and found flat throughput, p99 AND
peak RSS (137 MiB) from K=1..16: shrink-on-load already makes each decode
RAM-cheap, so sizing it to the CFS quota gains nothing measurable. Adding code
without a measured benefit isn't worth it.

Kept: the effective_parallelism() helper (it has a *measured* win in the Tokio
runtime — benches/RUNTIME.md) and the benchmark itself (reusable). The ffmpeg
video fan-out has a plausible a-priori case (one OS process per permit) but is
left as a future, deliberately-measured change rather than shipped on
speculation. Doc updated to record the decision.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JG5yYZ9s868mJwqT2Qz7ez
2026-06-22 09:04:37 +00:00
Claude 5629ba6200 perf(pools): size image/rayon pools to the CFS quota (effective_parallelism)
The thumbnail decode semaphore, the transcode rayon pool, and the ffmpeg
video-thumbnail fan-out all sized from std::thread::available_parallelism(),
which honours CPU affinity but ignores the CFS bandwidth quota (--cpus /
cgroup cpu.max). Under a container quota they therefore permit one CPU-heavy
task per *host* core onto cores the scheduler can't grant — the same
over-subscription the runtime worker pool had.

Switch all three to common::runtime::effective_parallelism() (= min(affinity,
CFS quota)), and fix the doc comments that wrongly claimed available_parallelism
respects cgroup quotas. No change off-quota (effective == available there); the
env overrides (OXICLOUD_THUMBNAIL_DECODE_CONCURRENCY,
OXICLOUD_VIDEO_THUMBNAIL_CONCURRENCY) are unchanged.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JG5yYZ9s868mJwqT2Qz7ez
2026-06-22 08:46:24 +00:00
Claude 5b8b740233 perf(blob): small read-ahead for the local backend (read_prefetch 1 -> 2)
The local backend inherited the trait's conservative read_prefetch() = 1
(strictly sequential chunk reassembly), while S3/Azure already use 8. The
prior rationale was that concurrent opens over scattered content-addressed
chunk files turn one sequential read into competing random I/O ("slower
cold"). Benchmarked that assumption with examples/bench_blob_prefetch
(sweeps the buffered(N) depth over a real LocalBlobBackend under disk-bound
vs network-bound consumers and warm vs cold page cache).

Result on SSD-class storage (median MB/s vs N=1):
  warm  disk-bound   N=2 +11.8%   N=8 +3.9%   N=16 -4.4%
  cold  disk-bound   N=2  +7.2%   (no cold regression on SSD)
  network-bound (throttled)  ~0% at any N — the socket, not the disk, caps it

So N=8 is wrong for local (leaves gain on the table, risks HDD seek thrash)
and the network-bound win the analysis assumed doesn't materialize: buffered()
here overlaps the per-chunk File::open (cheap on local disk), not the data
read. N=2 captures most of the disk-bound gain — which covers localhost/LAN
downloads AND the internal blob reads that drain as fast as the disk delivers
(thumbnail render, transcode, ZIP export, content extraction) — at the lowest
fan-out. Env-tunable via OXICLOUD_LOCAL_READ_PREFETCH (set 1 on seek-bound
HDDs to restore the old behaviour; raise on fast NVMe). Signature unchanged,
so all ~16 LocalBlobBackend::new call sites are untouched.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JG5yYZ9s868mJwqT2Qz7ez
2026-06-22 08:10:46 +00:00
DioCrafts f68972e368 perf(blob): one manifest query in read_blob_bytes instead of two
read_blob_bytes read the same storage.chunk_manifests PK row twice per
full-blob read — blob_size (SELECT total_size) then read_blob_stream
(SELECT chunk_hashes) — even though both columns live in one row. Fold
them into a single `SELECT chunk_hashes, total_size` and share the chunk
stream builder via a new stream_chunks helper. The legacy (no-manifest)
path is unchanged. Output is identical; the read just costs one fewer DB
round-trip.

Benchmark (examples/bench_blob_manifest.rs, isolates the manifest lookup
against the real Postgres): ~1.9x throughput and p50/p99 roughly halved on
that sub-step; the win is the removed round-trip under pool pressure during
upload bursts. Note this is the manifest sub-step only — end-to-end
read_blob_bytes is dominated by the actual chunk reads, and it is a
background path (thumbnail generation / EXIF / indexing), not normal gallery
serving. Methodology + honest framing in benches/BLOB-MANIFEST.md.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-22 00:01:56 +02:00
DioCrafts 5722481c4a feat(thumbnails): server-side video thumbnails via ffmpeg
Videos now get a thumbnail generated eagerly server-side on upload, through
the same WebP/blob-hash pipeline as photos — instead of the old browser path
that only ran when the Photos grid first rendered a video tile, re-downloaded
the whole video to seek a frame, and PUT 3 JPEGs back (and produced nothing at
all for HEVC/.mov, which a browser <video> cannot decode).

- New VideoFramePort (application) + FfmpegVideoFrameService / NoopVideoFrameService
  (infrastructure): shell out to the system ffmpeg (no compile-time libav dep),
  extract one representative frame as PNG, bounded by its own semaphore + a
  per-process timeout + kill_on_drop. Noop when ffmpeg is absent/disabled, so
  videos degrade gracefully to no thumbnail.
- ThumbnailRefreshHook.on_file_created routes video/* to
  generate_video_thumbnails_background: stream the (decrypted, reassembled) blob
  to a size- and time-bounded temp file on the data volume, extract a frame, and
  reuse the shared render_and_persist_all_webp helper — so video thumbnails are
  WebP, blob-hash keyed (dedup'd) and content-negotiated, exactly like photos.
- GET thumbnail serves the video's WebP to every client (byte-sniffed
  Content-Type); a genuine miss returns 204.
- Config: OXICLOUD_ENABLE_VIDEO_THUMBNAILS (default true, needs ffmpeg detected
  at startup) + OXICLOUD_FFMPEG_PATH / _CONCURRENCY / _TIMEOUT_SECS / _MAX_MB.
- Dockerfile installs ffmpeg in the runtime image.
- Frontend: drop the client-side generateVideoThumb/frameFromVideo re-download
  path; the server is now the source of truth.

Benchmark (examples/bench_video_thumbnails.rs, needs ffmpeg): 4/4 codecs incl.
HEVC/.mov produce a thumbnail server-side (was 0% for HEVC); ~50-70 ms/frame in
the background; ~3.9 KB preview WebP; up to ~23x less per-first-view transfer on
the test corpus (far more on real multi-MB clips). Methodology in
benches/VIDEO-THUMB.md.

Hardening from an adversarial review: video render holds the decode_semaphore
like the image path; the ffmpeg scale filter bounds both dimensions; the blob
stream has a timeout; the temp file lives on the data volume; the size cap uses
saturating_mul.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-21 23:23:04 +02:00
DioCrafts e7b85e56e2 feat(thumbnails): WebP output with Accept content negotiation
Thumbnails are now generated eagerly as lossy WebP (the primary codec) and
served to clients that advertise `Accept: image/webp`; JPEG is kept as a lazy
fallback for older clients and NextCloud, generated on first request and then
cached like WebP.

- ThumbnailFormat{Webp,Jpeg} enum threaded through encode/render/generate, the
  on-disk path ({hash}.webp / {hash}.jpg), the moka cache key
  (file_id, size, format), and cleanup (both formats removed).
- file_handler: parse Accept -> format, format-keyed ETag, `Vary: Accept` on
  every response (incl. 304) so shared caches never serve the wrong codec;
  Content-Type is byte-sniffed (infer) so it always matches the bytes.
- preview_handler (NextCloud) pins JPEG.
- webp = "0.3" (vendored libwebp via cc, no system dependency).

WEBP_QUALITY=82, chosen via a quality sweep (bench Table E1): SSIM within
~0.005 of JPEG q80 (imperceptible at thumbnail scale) for ~62% fewer bytes. On
the photo-realistic bench corpus the full set (3 sizes x 3 photos) drops 65.6%
(213->73 KB); real photos with edges/text land nearer ~25-40%. Encode is +5ms,
paid once in the eager background generator (off the request path).

The bench corpus is now photo-realistic (per-channel sums of low-frequency
sinusoids) instead of white noise, which had distorted codec byte ratios.
Methodology + numbers in benches/WEBP.md.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-21 21:16:08 +02:00
DioCrafts 778d551090 perf(authz): cache resource owner lookups in PgAclEngine
The owner short-circuit in PgAclEngine::check ran a PK query
(SELECT user_id FROM storage.folders/files WHERE id=$1) on every authorization
check of a folder/file — the common case, since users mostly act on their own
resources. Memoise it in an owner_cache (moka, TTL 300s, 100k cap). The owner
column is immutable, so this is safe: the cache maps resource -> real owner and
can never grant a non-owner access (a different caller's owner==uid test fails
against the cached owner and falls through to grants); a hard-deleted resource
that briefly resolves to its former owner simply fails later at execution with
NotFound. The per-check sql_queries counter now increments only on a miss.

Removes 1 DB query + 1 pool-connection acquisition per owner check. Magnitude is
deployment-specific (query latency x whether the pool is contended); see
benches/ACL-OWNER-CACHE.md.

Also adds two DB perf-investigation harnesses, gated behind the `bench` feature
(need the dev Postgres; zero prod impact):
- examples/bench_db_pool.rs + benches/DB-POOL.md — pool size vs tail latency
- examples/bench_owner_cache.rs + benches/ACL-OWNER-CACHE.md — owner query vs cache

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-21 16:56:11 +02:00