The mount only ever went from offline to online: nothing marked it
offline again, so after the Wi-Fi dropped every create, mkdir, delete and
rename called Drive, waited out the SDK's retries for up to two minutes
and answered EIO. Background loops kept polling the dead link.
Connectivity now lives in pdfs-fuse's new link module and goes both
ways. A call that gets no answer (a transport error or a request
timeout) marks the mount offline; a probe thread checks every 2 s,
backing off to 30 s, and on recovery re-lists folders served from the
database, retries failed operations and wakes the drain. Interactive
calls get a 20 s deadline, so a dead link costs one slow call instead of
many.
While offline:
- create, mkdir, unlink, rmdir and rename fall back to the offline
queue instead of answering EIO;
- folders list from the database even when not marked listed, and are
re-listed once the link returns;
- reads of uncached data wait up to 30 s for the link, then retry once
within the 120 s read deadline;
- statfs serves the last quota instead of fetching, and quota refreshes
are single-flight;
- the event and photo event loops wait for the link instead of polling.
A create whose request timed out may have landed anyway. When the drain
replays it and finds a same-named twin of the same kind, created within
the last two minutes and still empty, it adopts that node instead of
making a conflict copy. The drain also leaves alone a name still held
by a queued trash.
A create that answered ENOENT left no trace in the log. It now warns
when the parent folder is no longer known, and when the parent left the
tree while its children were being listed, naming the parent inode and
the new name.
The acceptance script's metadata throughput floor was 20 operations per
second, which a FUSE mount cannot reach: each create and unlink waits for
Drive before it returns, about 350 ms apiece. On a FUSE mount the floor
is now 3 operations per second; other paths keep 20. The mount type is
read from /proc/self/mountinfo.
A read that settles a provisional size invalidated the file's page cache
while the kernel held that read's page lock, so the worker waited on
itself forever (B110). Size upgrades now invalidate attributes only.
Renaming a node right after renaming it could be refused by Drive as out
of date, because the name hash read just before still held the old name.
Every remote rename now goes through Core::rename_remote, which retries
InvalidRequirements for up to ten seconds (B111).
Fixes from the account acceptance runs:
- B104: a reader open across a rename-over keeps working; the replaced
node is unlinked like any other open file instead of forgotten.
- B105: a drain worker holding a revision withdrawn by an unlink no
longer uploads it as a recovered-… conflict copy (Db::op_exists).
- B106: an open victim's queued ops are withdrawn at trash time, so a
repeated editor save no longer fails with AlreadyExists; the staged
blob goes with the last close.
- B107: a remote read gives up after 120 s with EIO instead of hanging
its caller; the timer is built inside the runtime.
- B108: a mirror upload whose local file was deleted after the scan is
skipped rather than counted as an error.
The acceptance script reports the failing line for non-assert errors,
ignores queue ops that predate the run, purges with delete-forever
first, and diagnoses a malformed SQLite database against a local replay.
The FUSE acceptance suite now runs on the signed-in account by default and
cleans up after itself; its first live runs found three daemon bugs.
- B101: a pwrite past EOF now authors the hole it leaves, so truncated bytes
no longer come back from the base. A write attached to a create while that
create uploads becomes a revision of the real uid instead of being dropped.
- B102: removing a folder drops the queued revisions of files below it, found
through the node tree, with their blobs and in-flight uploads. `pdfs rm`
now drops queued ops too.
- B103: each server call of a trash refresh times out after 120 s, so one hung
call can no longer freeze the trash listing until restart.
Acceptance suite: account mode with a manifest, lock and reaper; cleanup by
uid; queued ops naming a test root count as leftovers; new edge-case,
throughput and B100/B101 cases; the wide-directory case is split from the
deep tree and gets a doubled budget. Adds `pdfs trash --json`.
A file listed by the cheap enumeration reports its ciphertext size until
the size upgrade lands. Since B84 a read on that size fails with EIO, and
a write open started its handle at it. Reads and write opens now fetch
the real size first. A folder past the size-upgrade cap is queued instead
of dropped, so a large copy no longer leaves most folders provisional
(B100).
On 2026-09-18 the daemon hung: 43 minutes of CPU over 20 hours, 5.2 GiB
resident, silent from 17:10 until a manual restart the next day, and no
panic. Nothing in the journal said what it had been waiting on, and
nothing in the daemon could be asked.
- The worker pool publishes per-thread state: whether the thread is busy,
how long it has been in that state, and the label of the job in hand.
Every FUSE handler that hands work to the pool now names its job
(`read`, `lookup`, `rename`), so a stuck worker is named rather than
merely counted. Queue depths and per-lane completion counts are
mirrored outside the queue lock.
- `Request::Diagnostics` / `pdfs diagnostics` reports those, plus
resident size, the control handler count against its limit, the
in-flight control requests with their ages, and the pending-op count.
- Built to answer while the daemon is wedged: atomics and `try_lock`
only, and the one field that needs the database reads it on a throwaway
thread with a 500 ms deadline.
B69 — spurious `(sync-conflict)` copies came from `(mtime, size)` being used as a
revision identity. The server re-stamps a sealed revision with its own commit
time, so the drain diverted a write into a conflict copy of its own base; and
`plan_file` classified a no-baseline (local, remote) pair as `Conflict`, forking
every pre-existing file on first reconcile.
- `Baseline` carries `revision_id` (from the SDK's new `active_revision_id`),
captured at write-open and preserved across supersede/rebaseline.
`revision_changed` trusts the id and only falls back to `(mtime, size)` for
old sidecars.
- Planner gains `FilePlan::AdoptBaseline`: equal-size no-baseline pairs are
recorded, not conflicted. Divergent sizes stay a real conflict.
- New `sweep.rs` (`pdfs-conflict-sweep`, 5-min cadence) removes conflict copies
proven identical by size + `content_sha1` and surfaces divergent ones once as
an `ActivityKind::Conflict` entry. Never removes what it cannot prove.
B70 — browsers downloading into an on-demand mount had their in-flight temps
sealed as canonical revisions, exiling the finished file to a conflict copy.
`syncignore::is_transient_name` now recognises download/scratch temps, and the
on-demand `release`/`rename` paths hold them (`set_create_hold`) instead of
sealing until the name is finalized.
Workspace deps bumped to proton-sdk/proton-drive-rs 0.2.2 (registry, no patch).
Live validation against a real account still pending for both.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V8P42asymU158CPnhjRwri
- Durable scratch/staging publication and preservation on failure.
- Transactional pending-operation supersession.
- Conflict copies cannot overwrite older copies or lose the source.
- Single-entry wipe protection and incomplete-scan aborts.
- Failed local deletion retains its baseline.
- Downloads are fsynced before baseline settlement.
- Future database schemas are refused.
- Event cursors advance only after successful invalidation and persistence.
- IPC frame, timeout, and concurrency limits.
- Atomic config saves; malformed configs are preserved.
- Sensitive directories require correct ownership, real directories, and 0700.
- Debian package now includes service and tray autostart files.
- Release workflow enforces versions, tests, lint, formatting, and offline acceptance.
- CI now runs offline filesystem acceptance.
nvrl
