- cluster_def.h: add struct tag `cluster_s` to cluster_t to resolve
conflicting typedef with persist.h forward declaration
- cluster_def.h: add HOOK_DETAIL_JOB_STOP and HOOK_DETAIL_JOB_RESUME enum
values after HOOK_DETAIL_JOB_RUSAGE_UPDATE
- job.c on_job_stop(): replace mark_job_update() call with direct
xce_run_hooks(BEFORE/AFTER, HOOK_DETAIL_JOB_STOP) so WAL writer
records stop events with the correct detail value
- job.c on_job_resume(): same pattern with HOOK_DETAIL_JOB_RESUME
- job.c do_clr_preason(): fix typo — second hook call was HOOK_BEFORE_EVENT
instead of HOOK_AFTER_EVENT (double-before, zero-after bug)
- join.c handle_worker_join(): move xce_reply() to after HOOK_AFTER_EVENT
so client ACK is not sent before WAL write completes (durability fix)
- testsuite/test_hooks.c: new TDD tests for JOB_STOP/RESUME enum values
- testsuite/controller_test.c + meson.build: register test_hooks suite
Reply ordering audit results:
job.c handle_jobsubmit: reply before AFTER_EVENT — intentional (jobid
returned to client before scheduler notification; WAL hook belongs in
BEFORE_EVENT for this path, handled in Task 13)
job.c do_set_preason: reply before set_preason() loop — intentional
fire-and-forget (no AFTER_EVENT hook at top level)
job.c do_clr_preason: reply before loop — same fire-and-forget pattern
job.c do_jobcontrol_op: no AFTER_EVENT hook, reply only — OK
join.c handle_worker_join: FIXED (reply moved after AFTER_EVENT)
worker.c on_worker_update/dead: reply after all hooks — OK
cluster.c: AFTER_EVENT hooks are internal (no reply) — OK
- persist_write_checkpoint_marker(): writes WAL_CHECKPOINT header entry
with CRC, increments current_lsn; never updates last_replicated_crc
(checkpoint markers are local-only, never replicated)
- write_snapshot(): atomic tmp→rename write of P0 sentinel snapshot
("XCESNAP\0" + checkpoint_lsn); full Cap'n Proto body in Task 11
- trim_wal_segments(): removes seg-*.wal files whose start LSN is
strictly less than checkpoint_lsn
- rotate_snapshots(): collects .capnp files, sorts by name (LSN order),
deletes oldest beyond snap_keep_n
- persist_checkpoint(): EBUSY guard via atomic_exchange, sequences
marker→lsn record→snapshot→trim→rotate, clears flag on exit
- 5 TDD tests in test_persist_checkpoint.c covering: snapshot file
creation, checkpoint_lsn advance, WAL lsn advance, EBUSY guard,
and rotation keeping at most snap_keep_n files
- All 18 controller unit tests pass (0 failures)
Extends src/schema/controller.capnp with persistence structures needed
for WAL replication and snapshots:
- PersistConfig (8 fields, @0-@7): capnp-serialisable copy of the
persistence configuration; mapped to capnp_persist_cfg_t to avoid
collision with the plain-C persist_config_t in persist.h
- SnapshotHeader (9 fields, @0-@8): snapshot manifest with LSN, term,
timestamp, record counts and checksums; mapped to capnp_snap_hdr_t
- ReplEnvelope (6 fields, @0-@5): replication wire envelope (NOT the
on-disk format); named to avoid collision with wal_entry_hdr_t and
the WALEntry_ internal symbol c-capnproto generates; mapped to
capnp_repl_envelope_t
Also extends existing structs:
- Job.transientSince @11 (UInt64=0, mapname transient_since): set when
job enters JOB_STAT_TRANSIENT; also adds uint64_t transient_since to
xce_job_t in types.h
- Worker.deadSince @6 (UInt64=0, mapname dead_since): mirrors existing
time_t dead_since field in xce_worker_t
OPCode enum extended with 7 replication opcodes @22-@28:
replEntry, replAck, redirect, heartbeat, steppingDown,
replSnapshot, replCatchUpDone
New C typedefs (capnp_persist_cfg_t, capnp_snap_hdr_t,
capnp_repl_envelope_t) added to typemap.h for the encode/decode shims.
TDD: test_persist_schema.c added (6 tests, all GREEN). Controller test
suite remains 1/1 PASS.
- Expose persist_t struct concretely in persist.h (opaque pattern deferred)
- persist_set_workdir() derives wal/snap paths from workdir+name
- persist_init() creates WAL/snap directories, rejects NFS mounts
- persist_wal_async() writes WAL entries with chained CRC32 via zlib
- Dedicated fsync pthread fires every wal_sync_ms milliseconds
- persist_flush() forces fdatasync for tests and clean shutdown
- WAL_CHECKPOINT type rejected with -EINVAL (never written via async path)
- Stubs: persist_recover, persist_wal_sync_append, persist_checkpoint
- Add fsync_thread_running flag to guard persist_stop when thread not started
- Add zlib_dep to controller and unit test meson targets
- 3 new TDD tests: init_creates_directories, wal_async_writes_entry,
checkpoint_type_rejected — all GREEN
