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feat(ha-config-bootstrap): wire repl_wait_majority_ack into persist_wal_sync_append (task 7.6)

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Rongsong Shen 2026-05-28 14:28:38 +00:00
parent 85c8565957
commit 684d3b6608
2 changed files with 21 additions and 8 deletions
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27
src/controller/persist.c
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@ -1005,21 +1005,34 @@ int persist_wal_sync_append(persist_t* p, uint32_t type,
return rc;
}
/* For sync replication (WAL_JOB_SUBMIT): wait for at least one standby ACK.
/* Majority-commit replication (Req 5.1–5.3).
* After local fsync via persist_wal_async, wait for majority quorum ACK.
* On quorum: advance committed_lsn. On no standbys or timeout: degraded.
* We use current_lsn - 1 because persist_wal_async already incremented it. */
uint64_t written_lsn;
pthread_mutex_lock(&p->lock);
written_lsn = p->current_lsn - 1;
pthread_mutex_unlock(&p->lock);
int sync_err = repl_wait_ack(&p->repl, written_lsn,
p->config.sync_timeout_ms);
if (sync_err < 0)
CTRL_METRIC_INC(ctrl_repl_degraded_count);
/* No standbys registered → degraded mode immediately (no quorum to wait for) */
mylock_lock(&p->repl.lock);
int has_standbys = (p->repl.nstandbys > 0);
mylock_unlock(&p->repl.lock);
int sync_err;
if (!has_standbys) {
sync_err = -ENODEV;
} else {
sync_err = repl_wait_majority_ack(&p->repl, p->config.sync_timeout_ms,
(uint8_t)OPCode_walAck);
if (sync_err == 0)
atomic_store_explicit(&p->committed_lsn, written_lsn, memory_order_release);
else
CTRL_METRIC_INC(ctrl_repl_degraded_count);
}
if (sync_rc_out)
*sync_rc_out = sync_err;
/* -ETIMEDOUT = degraded mode (local-only durability); -ENODEV = no standbys.
* Both are acceptable — primary continues operating. */
/* sync_err < 0 = degraded mode (local-only durability); continue operating. */
return 0;
}