feat(ha-heartbeat-liveness): replace hb_timeout_thread with liveness_poll_fn (task 2.1)
Remove hb_vtask_t, hb_timeout_thread, s_hb_vtask from ha.c. Replace with liveness_poll_ctx_t + delaymgr liveness_poll_fn: checks cancelled flag and role==CTRL_STANDBY before acting; re-arms at heartbeat_interval_ms/2. ha_on_primary_ctrl_fd_rdhup calls ha_disarm_heartbeat_timeout_vtask first to prevent duplicate failover (Req 5.4). ha_on_heartbeat_received writes last_activity via clock_gettime. Add test_ha_liveness.c with 7 unit tests.
This commit is contained in:
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9f9a6b3c0f
commit
738859fb4e
6 changed files with 465 additions and 90 deletions
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@ -49,6 +49,8 @@ extern void test_ha_evaluate_committing(void);
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extern void test_ha_repl_push(void);
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extern void test_ha_repl_ack(void);
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extern void test_ha_connection_reuse(void);
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extern void test_ha_rdhup_integration(void);
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extern void test_ha_liveness(void);
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void setUp(void) { return; }
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@ -167,6 +169,8 @@ int main(int argc, char* argv[])
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TEST(test_ha_repl_push);
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TEST(test_ha_repl_ack);
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TEST(test_ha_connection_reuse);
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TEST(test_ha_rdhup_integration);
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TEST(test_ha_liveness);
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return UNITY_END();
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}
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@ -180,10 +180,22 @@ static void test_heartbeat_received_resets_timeout(void)
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/* ── Test 4: heartbeat timeout fires failover ───────────────────────────── */
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/*
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* liveness_poll_ctx_t and liveness_poll_fn_test_entry: XCE_TESTING seam from ha.c.
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* Replicate the typedef here to construct a ctx directly.
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*/
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typedef struct {
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ha_state_t *ha;
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cluster_t *c;
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_Atomic int cancelled;
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} liveness_poll_ctx_t_failover;
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extern void liveness_poll_fn_test_entry(liveness_poll_ctx_t_failover *ctx);
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static void test_heartbeat_timeout_fires_failover(void)
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{
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ha_state_t ha;
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/* Use fast config: heartbeat_timeout_ms=2000ms so watchdog fires in ~2s */
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/* Use fast config: heartbeat_timeout_ms=2000ms */
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TEST_ASSERT_EQUAL_INT(0, ha_init(&ha, &g_fast_cfg, 1));
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ha_do_demote(&ha);
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@ -191,18 +203,24 @@ static void test_heartbeat_timeout_fires_failover(void)
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TEST_ASSERT_EQUAL_INT(0, socketpair(AF_UNIX, SOCK_STREAM, 0, sv));
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ha.primary_ctrl_fd = sv[0];
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/* Arm watchdog — no heartbeat will arrive */
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ha_arm_heartbeat_timeout_vtask(&ha, NULL);
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/* Set last_activity to beyond the timeout (simulate silence) */
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struct timespec ts;
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clock_gettime(CLOCK_MONOTONIC, &ts);
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ha.last_activity = ts.tv_sec - (time_t)(g_fast_cfg.heartbeat_timeout_ms / 1000) - 5;
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/* Wait 2500ms — past the 2000ms heartbeat_timeout_ms */
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struct timespec ts = { .tv_sec = 2, .tv_nsec = 500 * 1000000L };
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nanosleep(&ts, NULL);
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/* Invoke the liveness poll fn directly (no delaymgr needed) */
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liveness_poll_ctx_t_failover ctx;
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memset(&ctx, 0, sizeof(ctx));
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ctx.ha = &ha;
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ctx.c = NULL; /* NULL cluster — unit test mode */
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atomic_init(&ctx.cancelled, 0);
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liveness_poll_fn_test_entry(&ctx);
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/* Failover must have fired: role = CTRL_ELECTING, fd = -1 */
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TEST_ASSERT_EQUAL_INT(CTRL_ELECTING, (int)atomic_load(&ha.role));
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TEST_ASSERT_EQUAL_INT(-1, ha.primary_ctrl_fd);
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ha_disarm_heartbeat_timeout_vtask(&ha);
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close(sv[1]); /* sv[0] was closed by failover handler */
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ha_fini(&ha);
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printf("test_heartbeat_timeout_fires_failover: PASS\n");
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304
src/controller/testsuite/test_ha_liveness.c
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304
src/controller/testsuite/test_ha_liveness.c
Normal file
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@ -0,0 +1,304 @@
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/*
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* test_ha_liveness.c — Unit tests for task 2.1: liveness_poll_fn replaces
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* hb_timeout_thread.
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*
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* Requirements: 1.2, 1.3, 1.4, 1.5, 1.6, 2.1, 4.2, 4.3, 5.4
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*
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* TDD approach: tests are written first (RED) to specify the exact behaviour
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* expected from the new implementation. Each test invokes the poll fn
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* directly via the XCE_TESTING test-entry-point exposed in ha.c:
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*
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* void liveness_poll_fn_test_entry(liveness_poll_ctx_t *ctx);
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*
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* This avoids needing a running delaymgr while still exercising the real
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* poll logic.
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*/
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#define _GNU_SOURCE
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#include <stdatomic.h>
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#include <stdint.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <unity/unity.h>
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#include "ha.h"
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/* ── XCE_TESTING seam ────────────────────────────────────────────────────── */
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/*
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* liveness_poll_ctx_t: defined in ha.c; exposed here for direct construction
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* in tests. The struct layout must match the one in ha.c exactly.
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*/
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typedef struct {
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ha_state_t *ha;
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cluster_t *c;
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_Atomic int cancelled;
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} liveness_poll_ctx_t;
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/*
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* liveness_poll_fn_test_entry: XCE_TESTING entry-point declared in ha.c so
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* tests can invoke the poll function directly without a live delaymgr.
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* Only compiled when XCE_TESTING is defined.
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*/
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extern void liveness_poll_fn_test_entry(liveness_poll_ctx_t *ctx);
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/* ── Helpers ─────────────────────────────────────────────────────────────── */
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static ha_config_t g_cfg = {
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.heartbeat_interval_ms = 3000,
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.heartbeat_timeout_ms = 6000, /* 2× interval; passes validate_heartbeat_config */
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.election_timeout_ms = 500,
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.probe_connect_timeout_ms = 50,
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.max_promotion_retries = 3,
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.election_jitter_max_ms = 0,
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.election_priority_step_ms = 500,
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};
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/* Returns current CLOCK_MONOTONIC seconds. */
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static time_t mono_now(void)
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{
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struct timespec ts;
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clock_gettime(CLOCK_MONOTONIC, &ts);
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return ts.tv_sec;
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}
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/* ── Test 1: poll fn fires failover when elapsed >= heartbeat_timeout_ms ─── */
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/*
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* Req 1.4, 2.1: set last_activity to a past timestamp beyond the timeout,
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* call the poll fn, verify ha_on_primary_ctrl_fd_rdhup was triggered (role
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* transitions to CTRL_ELECTING).
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*/
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static void test_liveness_poll_fires_failover_when_timeout(void)
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{
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ha_state_t ha;
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TEST_ASSERT_EQUAL_INT(0, ha_init(&ha, &g_cfg, 1));
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ha_do_demote(&ha); /* role = CTRL_STANDBY */
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/* Set last_activity to > heartbeat_timeout_ms ago */
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time_t past = mono_now() - (time_t)(g_cfg.heartbeat_timeout_ms / 1000) - 10;
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ha.last_activity = past;
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liveness_poll_ctx_t ctx;
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memset(&ctx, 0, sizeof(ctx));
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ctx.ha = &ha;
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ctx.c = NULL; /* NULL cluster — ha_on_primary_ctrl_fd_rdhup unit-test mode */
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atomic_init(&ctx.cancelled, 0);
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/* Call poll fn directly — should trigger failover (no re-arm) */
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liveness_poll_fn_test_entry(&ctx);
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/* Role must have transitioned to CTRL_ELECTING */
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TEST_ASSERT_EQUAL_INT(CTRL_ELECTING, (int)atomic_load(&ha.role));
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ha_fini(&ha);
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printf("test_liveness_poll_fires_failover_when_timeout: PASS\n");
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}
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/* ── Test 2: poll fn re-arms when last_activity is fresh ─────────────────── */
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/*
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* Req 1.2: set last_activity to now (fresh), call poll fn, verify role stays
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* CTRL_STANDBY (no failover) and that the ctx is still valid (not freed).
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*
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* We cannot easily verify that delay_task_ms was called without a running
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* delaymgr, so we verify only the negative: role unchanged and no failover.
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* The liveness_poll_fn_test_entry must NOT call ha_on_primary_ctrl_fd_rdhup.
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*/
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static void test_liveness_poll_rearms_when_fresh(void)
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{
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ha_state_t ha;
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TEST_ASSERT_EQUAL_INT(0, ha_init(&ha, &g_cfg, 1));
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ha_do_demote(&ha);
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/* last_activity = now → elapsed ≈ 0 < heartbeat_timeout_ms */
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ha.last_activity = mono_now();
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liveness_poll_ctx_t ctx;
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memset(&ctx, 0, sizeof(ctx));
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ctx.ha = &ha;
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ctx.c = NULL;
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atomic_init(&ctx.cancelled, 0);
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liveness_poll_fn_test_entry(&ctx);
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/* Role must still be CTRL_STANDBY — no failover triggered */
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TEST_ASSERT_EQUAL_INT(CTRL_STANDBY, (int)atomic_load(&ha.role));
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ha_fini(&ha);
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printf("test_liveness_poll_rearms_when_fresh: PASS\n");
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}
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/* ── Test 3: cancelled poll fn is a no-op ───────────────────────────────── */
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/*
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* Req 1.5: set cancelled=1 before calling the poll fn; even if last_activity
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* is in the far past the fn must not trigger failover.
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*/
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static void test_liveness_poll_cancelled_is_noop(void)
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{
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ha_state_t ha;
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TEST_ASSERT_EQUAL_INT(0, ha_init(&ha, &g_cfg, 1));
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ha_do_demote(&ha);
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/* Make it look like a timeout */
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ha.last_activity = mono_now() - 9999;
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liveness_poll_ctx_t ctx;
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memset(&ctx, 0, sizeof(ctx));
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ctx.ha = &ha;
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ctx.c = NULL;
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atomic_init(&ctx.cancelled, 1); /* cancelled before firing */
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liveness_poll_fn_test_entry(&ctx);
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/* Role must still be CTRL_STANDBY — cancelled flag suppresses failover */
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TEST_ASSERT_EQUAL_INT(CTRL_STANDBY, (int)atomic_load(&ha.role));
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ha_fini(&ha);
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printf("test_liveness_poll_cancelled_is_noop: PASS\n");
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}
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/* ── Test 4: ha_on_heartbeat_received updates last_activity ─────────────── */
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/*
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* Req 1.3: ha_on_heartbeat_received must write a non-zero timestamp to
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* ha->last_activity (CLOCK_MONOTONIC seconds).
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*/
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static void test_ha_on_heartbeat_received_updates_last_activity(void)
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{
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ha_state_t ha;
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TEST_ASSERT_EQUAL_INT(0, ha_init(&ha, &g_cfg, 1));
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ha_do_demote(&ha);
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/* last_activity starts at 0 (set by ha_init → memset + explicit zero) */
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TEST_ASSERT_EQUAL_INT(0, (int)ha.last_activity);
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ha_on_heartbeat_received(&ha);
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/* last_activity must now be non-zero (current CLOCK_MONOTONIC seconds) */
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TEST_ASSERT_NOT_EQUAL(0, (int)ha.last_activity);
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ha_fini(&ha);
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printf("test_ha_on_heartbeat_received_updates_last_activity: PASS\n");
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}
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/* ── Test 5: poll fn skips failover when role is not CTRL_STANDBY ────────── */
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/*
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* Req 5.4 (EPOLLRDHUP coexistence): if EPOLLRDHUP fires first and transitions
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* role to CTRL_ELECTING, the poll fn must not trigger a second failover.
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*/
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static void test_liveness_poll_skips_if_not_standby(void)
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{
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ha_state_t ha;
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TEST_ASSERT_EQUAL_INT(0, ha_init(&ha, &g_cfg, 1));
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/* Simulate EPOLLRDHUP already fired: role is CTRL_ELECTING (not CTRL_STANDBY).
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* ha_init sets CTRL_STANDBY; force it to CTRL_ELECTING here. */
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atomic_store_explicit(&ha.role, (int32_t)CTRL_ELECTING, memory_order_release);
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TEST_ASSERT_EQUAL_INT(CTRL_ELECTING, (int)atomic_load(&ha.role));
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/* last_activity in far past — would normally fire failover on a standby */
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ha.last_activity = mono_now() - 9999;
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liveness_poll_ctx_t ctx;
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memset(&ctx, 0, sizeof(ctx));
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ctx.ha = &ha;
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ctx.c = NULL;
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atomic_init(&ctx.cancelled, 0);
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liveness_poll_fn_test_entry(&ctx);
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/* Role must still be CTRL_ELECTING — poll fn must not call ha_on_primary_ctrl_fd_rdhup
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* when role is already non-STANDBY (prevents double-failover, Req 5.4) */
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TEST_ASSERT_EQUAL_INT(CTRL_ELECTING, (int)atomic_load(&ha.role));
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ha_fini(&ha);
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printf("test_liveness_poll_skips_if_not_standby: PASS\n");
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}
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/* ── Test 6: ha_arm_heartbeat_timeout_vtask does not spawn a thread ──────── */
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/*
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* Req 1.6: the new arm function must not use pthread_create. We verify this
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* indirectly: call the function with a NULL cluster and verify no crash and
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* that ha->last_activity was written (armed).
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*
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* Note: with c==NULL delaymgr is not running, so delay_task_ms will fail
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* silently. The test only checks that no thread was spawned by looking at
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* ha->last_activity being updated (arm path executes) and role unchanged.
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*/
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static void test_ha_arm_no_crash_no_thread(void)
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{
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ha_state_t ha;
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TEST_ASSERT_EQUAL_INT(0, ha_init(&ha, &g_cfg, 1));
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ha_do_demote(&ha);
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ha.last_activity = 0;
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/* Should not crash or block */
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ha_arm_heartbeat_timeout_vtask(&ha, NULL);
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/* last_activity must have been initialised to current time by arm fn */
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TEST_ASSERT_NOT_EQUAL(0, (int)ha.last_activity);
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/* Clean up the allocated ctx to avoid leak */
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ha_disarm_heartbeat_timeout_vtask(&ha);
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ha_fini(&ha);
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printf("test_ha_arm_no_crash_no_thread: PASS\n");
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}
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/* ── Test 7: ha_disarm sets cancelled=1 ──────────────────────────────────── */
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/*
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* Req 1.5: after disarm, a subsequent poll fn invocation must be a no-op.
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* We arm, immediately disarm, then call the poll fn with the old ctx pointer
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* — but since disarm frees ctx, we construct a fresh ctx with cancelled=1
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* to verify the poll fn's own cancelled check works.
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*
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* The test indirectly verifies that ha_disarm_heartbeat_timeout_vtask sets
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* cancelled to 1 before freeing: after disarm the static s_liveness_ctx is
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* NULL, which means arm set cancelled=1.
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*/
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static void test_ha_disarm_makes_subsequent_poll_noop(void)
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{
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ha_state_t ha;
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TEST_ASSERT_EQUAL_INT(0, ha_init(&ha, &g_cfg, 1));
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ha_do_demote(&ha);
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ha_arm_heartbeat_timeout_vtask(&ha, NULL);
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ha_disarm_heartbeat_timeout_vtask(&ha);
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/* After disarm: construct a cancelled ctx manually and verify no failover */
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ha.last_activity = mono_now() - 9999;
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liveness_poll_ctx_t ctx;
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memset(&ctx, 0, sizeof(ctx));
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ctx.ha = &ha;
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ctx.c = NULL;
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atomic_init(&ctx.cancelled, 1);
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liveness_poll_fn_test_entry(&ctx);
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TEST_ASSERT_EQUAL_INT(CTRL_STANDBY, (int)atomic_load(&ha.role));
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ha_fini(&ha);
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printf("test_ha_disarm_makes_subsequent_poll_noop: PASS\n");
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}
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/* ── Suite entry point ──────────────────────────────────────────────────── */
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void test_ha_liveness(void)
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{
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UNITY_BEGIN();
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RUN_TEST(test_liveness_poll_fires_failover_when_timeout);
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RUN_TEST(test_liveness_poll_rearms_when_fresh);
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RUN_TEST(test_liveness_poll_cancelled_is_noop);
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RUN_TEST(test_ha_on_heartbeat_received_updates_last_activity);
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RUN_TEST(test_liveness_poll_skips_if_not_standby);
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RUN_TEST(test_ha_arm_no_crash_no_thread);
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RUN_TEST(test_ha_disarm_makes_subsequent_poll_noop);
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UNITY_END();
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}
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