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myxce/src/controller/testsuite/test_config_repl.c
Rongsong Shen 65afa04aaf test(raft-adapter-conformance): full config-push reply integrity coverage 
Adds the remaining 3 of 4 handle_repl_config_push reject-path tests
(malformed request, missing bytes/sha256, conf_save_config failure via
a deterministic ENOTDIR fixture), the EAGAIN-still-accepts test, and
term-adoption-on-accept (task 2.2's own test only covered the reject
case). Requirement 2.4 (unknown-outcome handling) is already covered
by the pre-existing test_wait_all_with_timeout_slow_threads, cited
rather than duplicated.

1055 -> 1060 tests, 0 failures.
2026-07-29 13:13:25 +00:00

7483 lines
322 KiB
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/* test_config_repl.c — Unity tests for config replication Phase 1 */
#define _GNU_SOURCE
#include <unity/unity.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <openssl/sha.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
#include <pthread.h>
#include <stdatomic.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <utime.h>
#include <unistd.h>
#include <capnp_c.h>
#include "cluster.h"
#include "commit.h"
#include "config_repl.h"
#include "controller.capnp.h"
#include "ha.h"
#include "myconf.h"
#include "persist.h"
#include "repl.h"
#include "request.h"
#include "snapdiff.h" /* snapdiff_paths -- task 8.7 Scenario 2: prove a
* leadership-change-driven materialization drain
* produces a byte-identical checkpoint to an ordinary,
* non-promoted drain of the same marker */
#include "typemap.h"
#include "wal_types.h"
#include "xce/cluster_def.h"
#ifdef XCE_TESTING
/* Declared in ha.h — test seam for ha_apply_wal_catchup_entry.
* ep and c are passed as NULL in unit tests (ACK path is skipped when
* either is NULL — Task 3.1, ha-wal-replication). */
int ha_apply_wal_catchup_entry(ha_state_t *ha, persist_t *p,
wal_catchup_entry_t *entry,
struct endpoint_t *ep, cluster_t *c);
#endif
/* Per-test directory helpers — not Unity setUp/tearDown (those are in
* controller_test.c). Each test that needs a temp dir calls cr_setup()
* at the top and cr_teardown() via the label before returning. */
static char g_tmpdir[256];
/* g_instdir = g_tmpdir/ctrl0 — the effective_dir used by conf_save_config() */
static char g_instdir[300];
static char g_conf_dir[356];
/* tmpdir string for load_primary_config tests (no conf/current) */
static char tmpdir[256];
static void cr_setup(void)
{
snprintf(g_tmpdir, sizeof(g_tmpdir), "/tmp/test_cr_%d_%ld",
(int)getpid(), (long)time(NULL));
mkdir(g_tmpdir, 0700);
/* conf_save_config() writes to workdir/name/conf — mirror that here */
snprintf(g_instdir, sizeof(g_instdir), "%s/ctrl0", g_tmpdir);
mkdir(g_instdir, 0700);
snprintf(g_conf_dir, sizeof(g_conf_dir), "%s/conf", g_instdir);
mkdir(g_conf_dir, 0700);
}
static void cr_teardown(void)
{
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", g_tmpdir);
system(cmd);
g_tmpdir[0] = '\0';
g_conf_dir[0] = '\0';
}
/* ── conf_read_current_filename ─────────────────── */
static void test_conf_read_current_filename_missing(void)
{
cr_setup();
char out[256] = {0};
int rc = conf_read_current_filename(g_tmpdir, out, sizeof(out));
TEST_ASSERT_EQUAL_INT(-ENOENT, rc);
cr_teardown();
printf("test_conf_read_current_filename_missing: PASS\n");
}
static void test_conf_read_current_filename_empty_file(void)
{
cr_setup();
char ptr_path[400];
snprintf(ptr_path, sizeof(ptr_path), "%s/current", g_conf_dir);
int fd = open(ptr_path, O_WRONLY | O_CREAT | O_TRUNC, 0600);
TEST_ASSERT_NOT_EQUAL(-1, fd);
close(fd);
char out[256] = {0};
/* conf/current lives under g_instdir/conf — pass g_instdir as base */
int rc = conf_read_current_filename(g_instdir, out, sizeof(out));
TEST_ASSERT_EQUAL_INT(-ENODATA, rc);
cr_teardown();
printf("test_conf_read_current_filename_empty_file: PASS\n");
}
static void test_conf_read_current_filename_path_separator(void)
{
cr_setup();
char ptr_path[400];
snprintf(ptr_path, sizeof(ptr_path), "%s/current", g_conf_dir);
FILE *f = fopen(ptr_path, "w");
fprintf(f, "cluster.bin/../evil\n");
fclose(f);
char out[256] = {0};
/* conf/current lives under g_instdir/conf — pass g_instdir as base */
int rc = conf_read_current_filename(g_instdir, out, sizeof(out));
TEST_ASSERT_EQUAL_INT(-EINVAL, rc);
cr_teardown();
printf("test_conf_read_current_filename_path_separator: PASS\n");
}
static void test_conf_read_current_filename_bad_prefix(void)
{
cr_setup();
char ptr_path[400];
snprintf(ptr_path, sizeof(ptr_path), "%s/current", g_conf_dir);
FILE *f = fopen(ptr_path, "w");
fprintf(f, "badprefix.aabbccddeeff\n");
fclose(f);
char out[256] = {0};
/* conf/current lives under g_instdir/conf — pass g_instdir as base */
int rc = conf_read_current_filename(g_instdir, out, sizeof(out));
TEST_ASSERT_EQUAL_INT(-EINVAL, rc);
cr_teardown();
printf("test_conf_read_current_filename_bad_prefix: PASS\n");
}
static void test_conf_read_current_filename_wrong_hex_length(void)
{
cr_setup();
char ptr_path[400];
snprintf(ptr_path, sizeof(ptr_path), "%s/current", g_conf_dir);
FILE *f = fopen(ptr_path, "w");
fprintf(f, "cluster.bin.aabb\n"); /* only 4 hex chars, need 12 */
fclose(f);
char out[256] = {0};
/* conf/current lives under g_instdir/conf — pass g_instdir as base */
int rc = conf_read_current_filename(g_instdir, out, sizeof(out));
TEST_ASSERT_EQUAL_INT(-EINVAL, rc);
cr_teardown();
printf("test_conf_read_current_filename_wrong_hex_length: PASS\n");
}
/* ── conf_save_config + conf_read_current_filename round-trip ─ */
static void test_conf_save_creates_pointer_file(void)
{
cr_setup();
const uint8_t data[] = "fake capnproto config blob";
size_t len = sizeof(data) - 1;
uint8_t sha256[32];
SHA256(data, len, sha256);
myconf_t myconf;
memset(&myconf, 0, sizeof(myconf));
myconf.workdir = g_tmpdir;
myconf.name = "ctrl0";
myconf.conf_keep_n = 2;
myconf.conffile = NULL;
int rc = conf_save_config(&myconf, data, len, sha256);
TEST_ASSERT_EQUAL_INT(0, rc);
/* conf/current must exist */
char ptr_path[400];
snprintf(ptr_path, sizeof(ptr_path), "%s/current", g_conf_dir);
TEST_ASSERT_EQUAL_INT(0, access(ptr_path, F_OK));
free(myconf.conffile);
cr_teardown();
printf("test_conf_save_creates_pointer_file: PASS\n");
}
static void test_conf_save_filename_has_12_hex_suffix(void)
{
cr_setup();
const uint8_t data[] = "another fake blob";
size_t len = sizeof(data) - 1;
uint8_t sha256[32];
SHA256(data, len, sha256);
myconf_t myconf;
memset(&myconf, 0, sizeof(myconf));
myconf.workdir = g_tmpdir;
myconf.name = "ctrl0";
myconf.conf_keep_n = 2;
myconf.conffile = NULL;
conf_save_config(&myconf, data, len, sha256);
char fname[256] = {0};
/* conf_save_config() writes to workdir/name/conf — read from g_instdir */
int rc = conf_read_current_filename(g_instdir, fname, sizeof(fname));
TEST_ASSERT_EQUAL_INT(0, rc);
TEST_ASSERT_EQUAL_INT(0, strncmp(fname, "cluster.bin.", 12));
const char *hex = fname + 12;
TEST_ASSERT_EQUAL_INT(12, (int)strlen(hex));
TEST_ASSERT_EQUAL_INT(12, (int)strspn(hex, "0123456789abcdef"));
free(myconf.conffile);
cr_teardown();
printf("test_conf_save_filename_has_12_hex_suffix: PASS\n");
}
/* ── conf_trim_old_versions ─────────────────────── */
static void test_conf_trim_keeps_only_n_versions(void)
{
cr_setup();
myconf_t myconf;
memset(&myconf, 0, sizeof(myconf));
myconf.workdir = g_tmpdir;
myconf.name = "ctrl0";
myconf.conf_keep_n = 2;
myconf.conffile = NULL;
uint8_t sha256[32];
for (int i = 0; i < 3; i++) {
char data[32];
snprintf(data, sizeof(data), "config version %d", i);
SHA256((uint8_t *)data, strlen(data), sha256);
usleep(15000); /* ensure distinct mtime ordering */
conf_save_config(&myconf, (uint8_t *)data, strlen(data), sha256);
free(myconf.conffile);
myconf.conffile = NULL;
}
/* Count cluster.bin.* files (exclude .tmp) */
int count = 0;
DIR *d = opendir(g_conf_dir);
TEST_ASSERT_NOT_NULL(d);
struct dirent *e;
while ((e = readdir(d)) != NULL) {
if (strncmp(e->d_name, "cluster.bin.", 12) == 0 &&
strstr(e->d_name, ".tmp") == NULL)
count++;
}
closedir(d);
TEST_ASSERT_EQUAL_INT(2, count);
free(myconf.conffile);
cr_teardown();
printf("test_conf_trim_keeps_only_n_versions: PASS\n");
}
/* ── conf_get_saved_tag ─────────────────────────── */
static void test_conf_get_saved_tag_no_config(void)
{
cr_setup();
/* conf_get_saved_tag looks for conf/current under its argument;
* after the path fix, conf lives under workdir/name = g_instdir */
uint64_t tag = conf_get_saved_tag(g_instdir);
TEST_ASSERT_EQUAL_UINT64(0, tag);
cr_teardown();
printf("test_conf_get_saved_tag_no_config: PASS\n");
}
static void test_conf_get_saved_tag_after_save(void)
{
cr_setup();
const uint8_t data[] = "tag test blob";
size_t len = sizeof(data) - 1;
uint8_t sha256[32];
SHA256(data, len, sha256);
myconf_t myconf;
memset(&myconf, 0, sizeof(myconf));
myconf.workdir = g_tmpdir;
myconf.name = "ctrl0";
myconf.conf_keep_n = 2;
myconf.conffile = NULL;
conf_save_config(&myconf, data, len, sha256);
free(myconf.conffile);
uint64_t tag = conf_get_saved_tag(g_instdir);
TEST_ASSERT_NOT_EQUAL(0, tag);
/* Tag must equal first 8 bytes of sha256 in host order */
uint64_t expected;
memcpy(&expected, sha256, 8);
/* be64toh conversion */
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
expected = __builtin_bswap64(expected);
#endif
TEST_ASSERT_EQUAL_UINT64(expected, tag);
cr_teardown();
printf("test_conf_get_saved_tag_after_save: PASS\n");
}
/* ── conf_check_stale ───────────────────────────── */
static void test_conf_check_stale_disabled(void)
{
cr_setup();
/* timeout 0 = disabled, never stale */
TEST_ASSERT_EQUAL_INT(0, conf_check_stale(g_instdir, 0));
cr_teardown();
printf("test_conf_check_stale_disabled: PASS\n");
}
static void test_conf_check_stale_fresh(void)
{
cr_setup();
const uint8_t data[] = "stale test blob";
uint8_t sha256[32];
SHA256(data, sizeof(data) - 1, sha256);
myconf_t myconf;
memset(&myconf, 0, sizeof(myconf));
myconf.workdir = g_tmpdir;
myconf.name = "ctrl0";
myconf.conf_keep_n = 2;
myconf.conffile = NULL;
conf_save_config(&myconf, data, sizeof(data) - 1, sha256);
free(myconf.conffile);
/* Just saved — not stale with 24h timeout */
TEST_ASSERT_EQUAL_INT(0, conf_check_stale(g_instdir, 86400));
cr_teardown();
printf("test_conf_check_stale_fresh: PASS\n");
}
static void test_conf_check_stale_aged(void)
{
cr_setup();
const uint8_t data[] = "old config blob";
uint8_t sha256[32];
SHA256(data, sizeof(data) - 1, sha256);
myconf_t myconf;
memset(&myconf, 0, sizeof(myconf));
myconf.workdir = g_tmpdir;
myconf.name = "ctrl0";
myconf.conf_keep_n = 2;
myconf.conffile = NULL;
conf_save_config(&myconf, data, sizeof(data) - 1, sha256);
free(myconf.conffile);
/* Age the versioned file by 20 seconds via utime */
char fname[256] = {0};
/* conf_save_config() writes to workdir/name/conf — read from g_instdir */
conf_read_current_filename(g_instdir, fname, sizeof(fname));
char ver_path[512];
snprintf(ver_path, sizeof(ver_path), "%s/%s", g_conf_dir, fname);
struct utimbuf old_time;
old_time.actime = time(NULL) - 20;
old_time.modtime = time(NULL) - 20;
utime(ver_path, &old_time);
/* 5-second threshold → stale */
TEST_ASSERT_EQUAL_INT(1, conf_check_stale(g_instdir, 5));
/* 30-second threshold → not stale */
TEST_ASSERT_EQUAL_INT(0, conf_check_stale(g_instdir, 30));
cr_teardown();
printf("test_conf_check_stale_aged: PASS\n");
}
/* ── config_contains_reserved_name ─────────────── */
static void test_config_contains_reserved_name_absent(void)
{
/* NULL config — no reserved name */
TEST_ASSERT_EQUAL_INT(0, config_contains_reserved_name(NULL));
printf("test_config_contains_reserved_name_absent: PASS\n");
}
/* ── sanitise_cn ────────────────────────────────── */
static void test_sanitise_cn_printable(void)
{
char *out = sanitise_cn("ctrl01.example.com", 64);
TEST_ASSERT_EQUAL_STRING("ctrl01.example.com", out);
printf("test_sanitise_cn_printable: PASS\n");
}
static void test_sanitise_cn_control_chars(void)
{
char *out = sanitise_cn("evil\ninjection", 64);
/* newline replaced with '?' */
TEST_ASSERT_NOT_NULL(strchr(out, '?'));
TEST_ASSERT_NULL(strchr(out, '\n'));
printf("test_sanitise_cn_control_chars: PASS\n");
}
static void test_sanitise_cn_truncated(void)
{
char *out = sanitise_cn("abcdefghij", 5);
TEST_ASSERT_EQUAL_INT(5, (int)strlen(out));
printf("test_sanitise_cn_truncated: PASS\n");
}
/* ── load_primary_config (via test-only helper) ── */
#ifdef XCE_TESTING
static void test_load_primary_config_missing_returns_error(void)
{
/* Create a minimal cluster_t with no conf/current file */
cluster_t c;
memset(&c, 0, sizeof(c));
myconf_t myconf;
memset(&myconf, 0, sizeof(myconf));
/* Use a fresh tmpdir with no conf/current */
snprintf(tmpdir, sizeof(tmpdir), "/tmp/test_lpc_%d_%ld",
(int)getpid(), (long)time(NULL));
mkdir(tmpdir, 0700);
myconf.workdir = tmpdir;
myconf.name = "ctrl0";
myconf.conf_keep_n = 2;
myconf.conf_stale_timeout = 86400;
myconf.conffile = NULL;
c.myconf = &myconf;
/* No conf/current exists — must fail (not FATAL in test context) */
int rc = load_primary_config_for_test(&c);
TEST_ASSERT_TRUE(rc < 0);
/* conffile must still be NULL (no heap allocation on failure) */
TEST_ASSERT_NULL(myconf.conffile);
/* Cleanup */
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_load_primary_config_missing_returns_error: PASS\n");
}
#endif
/* ── test_conf_save_config_path_consistency ─────── */
static void test_conf_save_config_path_consistency(void)
{
/* Verify conf_save_config() writes to workdir/name/conf, not workdir/conf.
* This mirrors the path that load_primary_config() reads from. */
char workdir[256];
snprintf(workdir, sizeof(workdir), "/tmp/test_pathbug_%d", (int)getpid());
char instdir[300];
snprintf(instdir, sizeof(instdir), "%s/ctrl01", workdir);
char conf_dir[356];
snprintf(conf_dir, sizeof(conf_dir), "%s/conf", instdir);
mkdir(workdir, 0700);
/* conf_save_config() builds effective_dir = workdir/name internally,
* then mkdirs effective_dir/conf — but effective_dir itself must exist. */
mkdir(instdir, 0700);
/* Fake 32-byte sha256 and dummy payload */
uint8_t sha256[32];
memset(sha256, 0xab, sizeof(sha256));
const uint8_t payload[] = "dummy config bytes for path test";
size_t plen = sizeof(payload) - 1;
myconf_t myconf;
memset(&myconf, 0, sizeof(myconf));
myconf.workdir = workdir;
myconf.name = "ctrl01";
myconf.conf_keep_n = 2;
myconf.conffile = NULL;
int rc = conf_save_config(&myconf, payload, plen, sha256);
TEST_ASSERT_EQUAL_INT(0, rc);
/* Versioned file must be under workdir/name/conf/, not workdir/conf/ */
TEST_ASSERT_NOT_NULL(myconf.conffile);
TEST_ASSERT_EQUAL_INT(0, strncmp(myconf.conffile, conf_dir,
strlen(conf_dir)));
/* conf/current pointer file must exist at workdir/name/conf/current */
char ptr_path[400];
snprintf(ptr_path, sizeof(ptr_path), "%s/current", conf_dir);
TEST_ASSERT_EQUAL_INT(0, access(ptr_path, F_OK));
/* workdir/conf/ must NOT exist (wrong location) */
char wrong_conf[300];
snprintf(wrong_conf, sizeof(wrong_conf), "%s/conf", workdir);
struct stat st;
TEST_ASSERT_NOT_EQUAL(0, stat(wrong_conf, &st));
free(myconf.conffile);
/* Cleanup */
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", workdir);
system(cmd);
printf("test_conf_save_config_path_consistency: PASS\n");
}
/* ── WAL_CONFIG_MARKER codec (ha-term-safety task 4.1) ───────────────
* The config-change marker payload carries ONLY {version_tag, sha256} —
* a reference, never the configuration bytes (R7.2/R7.4). These tests
* exercise the fixed-size encode/decode codec that rides inside the
* raft_entry_blob_t envelope with type == WAL_CONFIG_MARKER. */
/* Round-trip: encode {version_tag, sha256} then decode → identical, and the
* encoded form is exactly the fixed marker size (tag + 32-byte hash) with NO
* configuration bytes appended. */
static void test_config_marker_encode_decode_roundtrip(void)
{
const uint64_t version_tag = 0x0123456789abcdefULL;
uint8_t sha256[32];
for (int i = 0; i < 32; i++)
sha256[i] = (uint8_t)(0xA0 + i);
uint8_t buf[64];
size_t enc_len = 0;
int rc = config_marker_encode(version_tag, sha256, buf, sizeof(buf), &enc_len);
TEST_ASSERT_EQUAL_INT(0, rc);
/* Encoded form carries NO config bytes: exactly 8 (tag) + 32 (sha256). */
TEST_ASSERT_EQUAL_UINT(WAL_CONFIG_MARKER_PAYLOAD_LEN, enc_len);
TEST_ASSERT_EQUAL_UINT(8u + 32u, enc_len);
uint64_t got_tag = 0;
uint8_t got_sha[32];
memset(got_sha, 0, sizeof(got_sha));
rc = config_marker_decode(buf, enc_len, &got_tag, got_sha);
TEST_ASSERT_EQUAL_INT(0, rc);
TEST_ASSERT_EQUAL_HEX64(version_tag, got_tag);
TEST_ASSERT_EQUAL_HEX8_ARRAY(sha256, got_sha, 32);
printf("test_config_marker_encode_decode_roundtrip: PASS\n");
}
/* The WAL entry type value must be exactly 50 and must not collide with the
* neighbouring WAL_NOOP (40) or WAL_CHECKPOINT (100) types (design.md). */
static void test_config_marker_enum_value_is_50(void)
{
TEST_ASSERT_EQUAL_INT(50, WAL_CONFIG_MARKER);
TEST_ASSERT_NOT_EQUAL(WAL_NOOP, WAL_CONFIG_MARKER);
TEST_ASSERT_NOT_EQUAL(WAL_CHECKPOINT, WAL_CONFIG_MARKER);
/* Strictly between WAL_NOOP and WAL_CHECKPOINT. */
TEST_ASSERT_TRUE(WAL_CONFIG_MARKER > WAL_NOOP);
TEST_ASSERT_TRUE(WAL_CONFIG_MARKER < WAL_CHECKPOINT);
printf("test_config_marker_enum_value_is_50: PASS\n");
}
/* A truncated (short) buffer must fail cleanly with -EINVAL, never read past
* the end of the supplied buffer. */
static void test_config_marker_decode_truncated_fails(void)
{
uint8_t sha256[32];
memset(sha256, 0x5c, sizeof(sha256));
uint8_t buf[WAL_CONFIG_MARKER_PAYLOAD_LEN];
size_t enc_len = 0;
TEST_ASSERT_EQUAL_INT(0, config_marker_encode(0xdeadbeefcafef00dULL, sha256,
buf, sizeof(buf), &enc_len));
uint64_t tag = 0;
uint8_t sha_out[32];
/* One byte short of a full marker payload → reject, no OOB read. */
int rc = config_marker_decode(buf, enc_len - 1, &tag, sha_out);
TEST_ASSERT_EQUAL_INT(-EINVAL, rc);
/* Zero-length buffer → reject. */
rc = config_marker_decode(buf, 0, &tag, sha_out);
TEST_ASSERT_EQUAL_INT(-EINVAL, rc);
printf("test_config_marker_decode_truncated_fails: PASS\n");
}
/* A too-small output buffer must fail with -ENOSPC and not overflow. */
static void test_config_marker_encode_short_buffer_fails(void)
{
uint8_t sha256[32];
memset(sha256, 0x11, sizeof(sha256));
uint8_t small[WAL_CONFIG_MARKER_PAYLOAD_LEN - 1];
size_t enc_len = 123; /* sentinel — must be left untouched on failure */
int rc = config_marker_encode(7, sha256, small, sizeof(small), &enc_len);
TEST_ASSERT_EQUAL_INT(-ENOSPC, rc);
printf("test_config_marker_encode_short_buffer_fails: PASS\n");
}
/* ── Config marker append + committed-config derive (task 4.2) ────────
*
* These bring a node up as the raft LEADER so config_append_marker routes the
* WAL_CONFIG_MARKER through ha_primary_log_append → raft_log_append (the same
* unified-log path job state uses), and assert the committed config is DERIVED
* from the latest committed marker within the committed prefix (R7.1/7.3/7.6/
* 7.7/7.11). Mirrors make_cluster/make_leader from test_term_safety_adapter.c. */
static cluster_t *t42_make_cluster(const char *tmpdir)
{
cluster_t *c = calloc(1, sizeof(cluster_t));
if (!c) return NULL;
persist_config_t cfg = persist_config_defaults();
cfg.wal_sync_ms = 5000;
cfg.snap_keep_n = 2;
persist_set_workdir(&c->persist, tmpdir, "ctrl-test");
if (persist_init(&c->persist, &cfg, c) != 0) { free(c); return NULL; }
if (persist_start(&c->persist) != 0) {
persist_fini(&c->persist);
free(c);
return NULL;
}
c->ha.raft_c = c;
return c;
}
static void t42_teardown(cluster_t *c)
{
if (!c) return;
persist_stop(&c->persist);
persist_fini(&c->persist);
free(c);
}
/* config-upgrade-snapshot task 5: committing a WAL_CONFIG_MARKER now triggers
* an automatic forced checkpoint the instant the marker is APPLIED (not just
* committed) via the live apply pump -- persist_apply_pump_kick's dispatch is
* a CAS race between whichever thread reaches it first, which can be either
* this test's own thread (inside commit_submit's synchronous
* commit_resolve_pending call) or persist_start's independent fsync_worker
* thread (via commit_on_durable_advance) once durable_lsn advances. When the
* fsync thread wins that race, commit_submit/commit_engine's own WAIT mode
* returns having waited only for COMMIT, not for this now-real APPLY+
* CHECKPOINT side effect to finish on that other thread -- a fixture's own
* subsequent LSN bookkeeping or explicit persist_checkpoint() call can then
* genuinely race the still-in-flight background checkpoint (observed as a
* flaky -EBUSY from persist_checkpoint() or an unexpectedly-advanced
* committed_lsn, depending on which check loses the race). This was always a
* latent, unsynchronized race in this fixture (the same one
* test_apply_pump.c's tap_wait_applied already documents and exists to
* close) -- applying a marker used to be a no-op, so racing on it was
* invisible; task 5 gives it a real, observable side effect for the first
* time. Poll persist_last_applied_lsn() up to a bounded deadline (mirrors
* tap_wait_applied exactly) before any LSN-sensitive step that follows a
* marker commit, closing the race rather than leaving it flaky. */
static void t42_wait_applied(persist_t *p, uint64_t lsn, uint32_t deadline_ms)
{
for (uint32_t waited = 0; waited < deadline_ms; waited += 5) {
if (persist_last_applied_lsn(p) >= lsn)
return;
usleep(5000);
}
}
/* Bring the node up as the raft LEADER at `term` (so raft_log_append is enabled
* — it returns -EPERM off the leader; see make_leader in the adapter suite). */
static void t42_make_leader(cluster_t *c, uint64_t term, int n_peers)
{
atomic_store(&c->ha.role, CTRL_PRIMARY);
atomic_store(&c->ha.term, term);
ha_init_raft(&c->ha, c, n_peers);
c->ha.raft.term = term;
c->ha.raft.role = RAFT_LEADER;
}
/* Fill an sha256 with a deterministic pattern; tag = be64 of first 8 bytes,
* matching the config_repl version_tag convention (config_version_tag). */
static uint64_t t42_make_ref(uint8_t sha256[32], uint8_t seed)
{
for (int i = 0; i < 32; i++)
sha256[i] = (uint8_t)(seed + i);
uint64_t tag;
memcpy(&tag, sha256, 8);
return be64toh(tag);
}
/* (a) Appending a config change writes a WAL_CONFIG_MARKER through the unified
* log: the entry lands at an LSN with the live election term stamped, and its
* payload decodes to {version_tag, sha256} (R7.1/7.3). */
static void test_config_marker_append_via_unified_log(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr42_append_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
const uint64_t T = 7;
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, T, /*n_peers*/1);
uint8_t sha[32];
uint64_t tag = t42_make_ref(sha, 0x10);
uint64_t lsn = 0;
TEST_ASSERT_EQUAL_INT(0, config_append_marker(c, tag, sha, &lsn));
/* Library assigned LSN 1 and stamped the live term for that entry. */
TEST_ASSERT_EQUAL_UINT64(1, lsn);
TEST_ASSERT_EQUAL_UINT64(1, c->ha.raft.log_len);
TEST_ASSERT_EQUAL_UINT64(T, persist_entry_term(&c->persist, 1));
t42_teardown(c);
printf("test_config_marker_append_via_unified_log: PASS\n");
}
/* (b) After the marker COMMITS (committed_lsn covers its LSN), the derived
* committed-config reference == that marker's {version_tag, sha256} (R7.7). */
static void test_committed_marker_derives_after_commit(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr42_derive_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/4, /*n_peers*/1);
/* A job entry then a config marker, so the marker is NOT at LSN 1. */
wal_jobstate_t js = { .jobid = 1, .state = 1 };
uint64_t jlsn = 0;
TEST_ASSERT_EQUAL_INT(0,
ha_primary_log_append(c, WAL_JOB_UPDATE, &js, sizeof(js), &jlsn));
uint8_t sha[32];
uint64_t tag = t42_make_ref(sha, 0x40);
uint64_t mlsn = 0;
TEST_ASSERT_EQUAL_INT(0, config_append_marker(c, tag, sha, &mlsn));
TEST_ASSERT_EQUAL_UINT64(2, mlsn);
TEST_ASSERT_EQUAL_INT(0, persist_flush(&c->persist));
/* Drive committed_lsn to the marker's LSN (the commit advance source). */
atomic_store_explicit(&c->persist.committed_lsn, mlsn, memory_order_release);
uint64_t got_tag = 0;
uint8_t got_sha[32];
memset(got_sha, 0, sizeof(got_sha));
TEST_ASSERT_EQUAL_INT(0, config_committed_marker(c, &got_tag, got_sha));
TEST_ASSERT_EQUAL_HEX64(tag, got_tag);
TEST_ASSERT_EQUAL_HEX8_ARRAY(sha, got_sha, 32);
t42_teardown(c);
printf("test_committed_marker_derives_after_commit: PASS\n");
}
/* (c) An UNCOMMITTED marker (LSN > committed_lsn) does NOT change the derived
* committed config: with committed_lsn at the first marker, a later second
* marker is invisible until committed (R7.7/7.11). */
static void test_uncommitted_marker_not_yet_committed_config(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr42_uncommit_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/5, /*n_peers*/1);
uint8_t sha1[32], sha2[32];
uint64_t tag1 = t42_make_ref(sha1, 0x10);
uint64_t tag2 = t42_make_ref(sha2, 0x80);
uint64_t l1 = 0, l2 = 0;
TEST_ASSERT_EQUAL_INT(0, config_append_marker(c, tag1, sha1, &l1));
TEST_ASSERT_EQUAL_INT(0, config_append_marker(c, tag2, sha2, &l2));
TEST_ASSERT_EQUAL_UINT64(1, l1);
TEST_ASSERT_EQUAL_UINT64(2, l2);
TEST_ASSERT_EQUAL_INT(0, persist_flush(&c->persist));
/* Only the FIRST marker is committed. The second is uncommitted. */
atomic_store_explicit(&c->persist.committed_lsn, l1, memory_order_release);
uint64_t got_tag = 0;
uint8_t got_sha[32];
TEST_ASSERT_EQUAL_INT(0, config_committed_marker(c, &got_tag, got_sha));
/* Derived config is the FIRST (committed) marker, NOT the uncommitted one. */
TEST_ASSERT_EQUAL_HEX64(tag1, got_tag);
TEST_ASSERT_EQUAL_HEX8_ARRAY(sha1, got_sha, 32);
/* With NOTHING committed, there is no committed config marker at all. */
atomic_store_explicit(&c->persist.committed_lsn, 0ULL, memory_order_release);
TEST_ASSERT_EQUAL_INT(-ENOENT, config_committed_marker(c, &got_tag, got_sha));
t42_teardown(c);
printf("test_uncommitted_marker_not_yet_committed_config: PASS\n");
}
/* (d) A divergent config marker at a conflicting (term,lsn) is truncated by the
* reconcile path exactly like a job entry: on_truncate_from(index) removes the
* marker (and everything above), leaving the committed prefix intact. This
* proves the marker is an ORDINARY log entry under (term,lsn) matching (R7.6).
*
* We append a committed job at LSN 1, then a divergent marker at LSN 2, drive
* committed_lsn to 1, then truncate from LSN 2 (the conflict point) and confirm
* the marker is gone while the committed job prefix survives. */
static void test_divergent_marker_truncated_like_job_entry(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr42_trunc_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/6, /*n_peers*/1);
/* LSN 1: committed job entry. LSN 2: a (divergent) config marker. */
wal_jobstate_t js = { .jobid = 9, .state = 2 };
uint64_t jlsn = 0;
TEST_ASSERT_EQUAL_INT(0,
ha_primary_log_append(c, WAL_JOB_UPDATE, &js, sizeof(js), &jlsn));
TEST_ASSERT_EQUAL_UINT64(1, jlsn);
uint8_t sha[32];
uint64_t tag = t42_make_ref(sha, 0x55);
uint64_t mlsn = 0;
TEST_ASSERT_EQUAL_INT(0, config_append_marker(c, tag, sha, &mlsn));
TEST_ASSERT_EQUAL_UINT64(2, mlsn);
TEST_ASSERT_EQUAL_INT(0, persist_flush(&c->persist));
/* The committed prefix is LSN 1 (the job). The marker at LSN 2 is the
* divergent suffix. The derived committed config is therefore NONE yet. */
atomic_store_explicit(&c->persist.committed_lsn, 1ULL, memory_order_release);
uint64_t got_tag = 0;
uint8_t got_sha[32];
TEST_ASSERT_EQUAL_INT(-ENOENT, config_committed_marker(c, &got_tag, got_sha));
/* Reconcile truncates from the conflict point (LSN 2) exactly as it would a
* job entry — the SAME on_truncate_from seam used by (term,lsn) matching. */
TEST_ASSERT_EQUAL_INT(0,
ha_cb_truncate_from_for_test(&c->ha, /*index*/2));
TEST_ASSERT_EQUAL_INT(0, persist_flush(&c->persist));
/* The marker is gone (term index shrank); the committed job prefix is intact. */
TEST_ASSERT_EQUAL_UINT64(0, persist_entry_term(&c->persist, 2));
TEST_ASSERT_EQUAL_UINT64(6, persist_entry_term(&c->persist, 1));
/* Still no committed config marker — the divergent one never committed. */
TEST_ASSERT_EQUAL_INT(-ENOENT, config_committed_marker(c, &got_tag, got_sha));
t42_teardown(c);
printf("test_divergent_marker_truncated_like_job_entry: PASS\n");
}
/* (e) INTEGRATION (Finding 1 remediation): drive a config change through the
* LIVE commit path (config_commit_change — the helper do_upgrade_config_with_bytes
* now calls) and assert (i) a WAL_CONFIG_MARKER lands at the LIVE term, and
* (ii) once the marker COMMITS through the real WAL commit barrier, the DERIVED
* committed config (config_committed_marker) equals it. This proves the live
* config-change path appends + commits + derives the marker — not the retired
* term-blind committed_config_tag push/ack/advance.
*
* A single-member commit engine is wired so config_commit_change's WAL barrier
* (repl_wait_majority_ack/OPCode_walAck → commit_submit) self-quorums and
* advances committed_lsn for real, exactly as the production single-node path. */
static void test_config_commit_change_live_path_commits_and_derives(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr42_live_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
const uint64_t T = 9;
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, T, /*n_peers*/1);
/* Single-member commit engine: the marker's WAL LSN self-quorums, so
* driving commit_submit on it advances committed_lsn through the REAL commit
* machinery — the same path that commits the marker in production once a
* majority acks the WAL stream (no manual committed_lsn poke). */
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, /*n_peers*/1, /*n_vcpus*/8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
uint8_t sha[32];
uint64_t tag = t42_make_ref(sha, 0x30);
/* The LIVE entry point do_upgrade_config_with_bytes now calls: append the
* WAL_CONFIG_MARKER consensus record + out-of-band byte push + the existing
* majority barrier. With no standbys (single member) the byte barrier
* self-quorums and the call returns 0. */
int acked = -1;
TEST_ASSERT_EQUAL_INT(0,
config_commit_change(c, (const uint8_t *)"cfg-bytes", 9, sha, tag, &acked));
/* (i) The marker landed at LSN 1 with the LIVE election term stamped. */
TEST_ASSERT_EQUAL_UINT64(1, c->ha.raft.log_len);
TEST_ASSERT_EQUAL_UINT64(T, persist_entry_term(&c->persist, 1));
/* No standbys registered → zero out-of-band pushes (barrier owns the verdict). */
TEST_ASSERT_EQUAL_INT(0, acked);
/* Make the marker durable (advances durable_lsn) then commit its WAL LSN
* through the real commit engine (self-quorum), exactly as a majority WAL
* ack does in production — this advances committed_lsn so the derive sees
* the marker in the committed prefix. */
TEST_ASSERT_EQUAL_INT(0, persist_flush(&c->persist));
TEST_ASSERT_EQUAL_INT(0,
commit_submit(&c->commit, /*marker LSN*/1, COMMIT_MODE_WAIT, 1000));
TEST_ASSERT_TRUE(
atomic_load_explicit(&c->persist.committed_lsn, memory_order_acquire) >= 1);
/* (ii) The DERIVED committed config equals the change just committed. */
uint64_t got_tag = 0;
uint8_t got_sha[32];
TEST_ASSERT_EQUAL_INT(0, config_committed_marker(c, &got_tag, got_sha));
TEST_ASSERT_EQUAL_HEX64(tag, got_tag);
TEST_ASSERT_EQUAL_HEX8_ARRAY(sha, got_sha, 32);
/* committed_config_tag is now a CACHE mirroring the derived marker. */
TEST_ASSERT_EQUAL_HEX64(tag,
atomic_load_explicit(&c->ha.committed_config_tag, memory_order_acquire));
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_config_commit_change_live_path_commits_and_derives: PASS\n");
}
/* (f) COMPACTION SAFETY (Finding 2 remediation): a checkpoint that TRIMS the WAL
* segment holding a committed marker must NOT lose the derived committed config.
* Without the sentinel-carried reference + fallback, the live-WAL scan regresses
* to -ENOENT after the trim. We commit a marker, force a NEW segment + checkpoint
* (which trims the old segment containing the marker), and assert the derive
* STILL returns the committed reference (R7.7/R7.10). */
static void test_committed_marker_survives_checkpoint_trim(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr42_trim_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
const uint64_t T = 11;
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, T, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, /*n_peers*/1, /*n_vcpus*/8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
uint8_t sha[32];
uint64_t tag = t42_make_ref(sha, 0x70);
/* Append the marker (segment 0, the lowest-LSN segment) and commit its WAL
* LSN through the real engine (self-quorum) so it enters the committed
* prefix — the production marker-commit path. */
int acked = -1;
TEST_ASSERT_EQUAL_INT(0,
config_commit_change(c, (const uint8_t *)"cfg", 3, sha, tag, &acked));
TEST_ASSERT_EQUAL_INT(0, persist_flush(&c->persist));
TEST_ASSERT_EQUAL_INT(0,
commit_submit(&c->commit, /*marker LSN*/1, COMMIT_MODE_WAIT, 1000));
uint64_t committed =
atomic_load_explicit(&c->persist.committed_lsn, memory_order_acquire);
TEST_ASSERT_TRUE(committed >= 1);
/* config-upgrade-snapshot task 5: wait for the marker to be APPLIED (see
* t42_wait_applied's doc comment) before this test's own explicit
* persist_checkpoint() call below -- otherwise it can race the marker's
* own now-automatic checkpoint (possibly still running on the
* fsync_worker thread) and see a spurious -EBUSY from the shared
* checkpoint_in_progress guard. */
t42_wait_applied(&c->persist, /*marker LSN*/1, 2000);
/* Sanity: before any trim, the live-WAL scan finds the marker. */
uint64_t got_tag = 0;
uint8_t got_sha[32];
TEST_ASSERT_EQUAL_INT(0, config_committed_marker(c, &got_tag, got_sha));
TEST_ASSERT_EQUAL_HEX64(tag, got_tag);
/* Roll to a NEW segment so the checkpoint's trim has an older segment (the
* one holding the marker) to unlink — the compaction hazard. */
TEST_ASSERT_EQUAL_INT(0, persist_test_force_new_segment(&c->persist));
/* Checkpoint: stamps the committed-marker reference into the sentinel, then
* trims the older segment (which physically held the marker). */
TEST_ASSERT_EQUAL_INT(0, persist_checkpoint(&c->persist));
/* The marker's segment is gone, so the live-WAL scan alone would regress to
* -ENOENT; the derive MUST fall back to the durable sentinel reference. */
got_tag = 0;
memset(got_sha, 0, sizeof(got_sha));
TEST_ASSERT_EQUAL_INT(0, config_committed_marker(c, &got_tag, got_sha));
TEST_ASSERT_EQUAL_HEX64(tag, got_tag);
TEST_ASSERT_EQUAL_HEX8_ARRAY(sha, got_sha, 32);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_committed_marker_survives_checkpoint_trim: PASS\n");
}
/* ── Config byte delivery: hash-verify-before-activate + serve-fence (task 4.3) ─
*
* config_activate_committed is the CONSUMER of config_committed_marker (4.2's
* derive). It keys the out-of-band config-push byte delivery to the committed
* marker's {version_tag, sha256}: it VERIFIES the locally-held bytes' sha256
* against the committed marker BEFORE activating (R7.8), and on a mismatch (or
* bytes absent locally) keeps the member from serving under the new configuration
* and KEEPS RETRYING rather than activating mismatched config (R7.9) — the loud
* non-serving fence that NEVER self-terminates. On recovery it activates the
* configuration referenced by the LATEST committed marker (R7.10).
*
* These tests reuse the 4.2 leader fixture (t42_*) but additionally wire c->myconf
* so the locally-held config bytes path (conf_save_config / conf_read_raw /
* load_primary_config) is exercised. */
/* Build a VALID Cap'n Proto ClusterConfig blob (decodable by load_primary_config)
* so the match path can actually ACTIVATE. Mirrors cb5_make_config_blob. */
static uint8_t *t43_make_config_blob(size_t *len_out)
{
cluster_config_t cfg;
struct capn cap;
struct capn_segment *cs;
ClusterConfig_ptr p;
uint8_t *buf;
size_t sz;
memset(&cfg, 0, sizeof(cfg));
cfg.clustername = (char *)"t43-upgrade";
cfg.config_generation = 1;
capn_init_malloc(&cap);
cs = capn_root(&cap).seg;
encode_ClusterConfig_ptr(cs, &p, &cfg);
capn_setp(capn_root(&cap), 0, p.p);
sz = (size_t)capn_size(&cap);
buf = (uint8_t *)malloc(sz);
TEST_ASSERT_NOT_NULL(buf);
capn_write_mem(&cap, buf, sz, 0);
capn_free(&cap);
*len_out = sz;
return buf;
}
/* Wire a myconf_t into the cluster so conf_save_config / load_primary_config
* resolve under <tmpdir>/<name>/conf (the production layout). */
static myconf_t *t43_attach_myconf(cluster_t *c, const char *tmpdir)
{
myconf_t *mc = calloc(1, sizeof(myconf_t));
TEST_ASSERT_NOT_NULL(mc);
mc->workdir = strdup(tmpdir);
mc->name = strdup("ctrl-test");
mc->conf_keep_n = 2;
mc->conffile = NULL;
/* bug-1476: the real load_primary_config()/config_activate_committed()
* paths this fixture drives now take mc->lock -- must be initialized. */
TEST_ASSERT_EQUAL_INT(0, mylock_init(&mc->lock));
c->myconf = mc;
return mc;
}
static void t43_free_myconf(cluster_t *c)
{
myconf_t *mc = c->myconf;
if (!mc) return;
if (mc->cluster_config) {
free_ClusterConfig(mc->cluster_config);
free(mc->cluster_config);
}
free(mc->conffile);
free(mc->workdir);
free(mc->name);
mylock_fini(&mc->lock);
free(mc);
c->myconf = NULL;
}
/* Commit a WAL_CONFIG_MARKER for `sha`/`tag` through the real commit engine so
* config_committed_marker returns it (the committed-prefix authority 4.3 reads).
* Also waits for the marker to be APPLIED (see t42_wait_applied's doc comment)
* so callers' own subsequent LSN bookkeeping never races this marker's own
* task-5 automatic checkpoint, wherever it happens to run. */
static void t43_commit_marker(cluster_t *c, uint64_t tag, const uint8_t sha[32])
{
uint64_t mlsn = 0;
TEST_ASSERT_EQUAL_INT(0, config_append_marker(c, tag, sha, &mlsn));
TEST_ASSERT_EQUAL_INT(0, persist_flush(&c->persist));
TEST_ASSERT_EQUAL_INT(0,
commit_submit(&c->commit, mlsn, COMMIT_MODE_WAIT, 1000));
TEST_ASSERT_TRUE(
atomic_load_explicit(&c->persist.committed_lsn, memory_order_acquire) >= mlsn);
t42_wait_applied(&c->persist, mlsn, 2000);
}
/* (4.3-a) MATCH activates: a committed marker whose locally-held bytes' sha256
* MATCHES the marker activates the configuration and leaves the member UN-fenced
* (R7.8). */
static void test_config_activate_match_activates_and_unfences(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr43_match_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/3, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
/* The locally-held bytes (saved exactly as the config-push handler would). */
size_t blen = 0;
uint8_t *bytes = t43_make_config_blob(&blen);
uint8_t sha[32];
SHA256(bytes, blen, sha);
uint64_t tag;
{ uint64_t t; memcpy(&t, sha, 8); tag = be64toh(t); }
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytes, blen, sha));
free(bytes);
/* Commit a marker that references EXACTLY those bytes. */
t43_commit_marker(c, tag, sha);
/* HASH-VERIFIED → activate, fence stays clear. */
TEST_ASSERT_EQUAL_INT(0, config_activate_committed(c));
TEST_ASSERT_EQUAL_INT(0, config_serve_fenced(c));
/* Activation loaded the config into myconf. */
TEST_ASSERT_NOT_NULL(mc->cluster_config);
TEST_ASSERT_EQUAL_HEX64(tag, mc->config_version_tag);
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_config_activate_match_activates_and_unfences: PASS\n");
}
/* (4.3-b) MISMATCH fences + retries, NEVER activates: an injected hash mismatch
* (locally-held bytes whose sha256 != the committed marker) keeps the member
* FENCED (non-serving), ALIVE, and retrying, and does NOT activate the mismatched
* config (R7.9). */
static void test_config_activate_mismatch_fences_and_does_not_activate(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr43_mismatch_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/4, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
/* Locally-held bytes are blob A (sha A). */
size_t blenA = 0;
uint8_t *bytesA = t43_make_config_blob(&blenA);
uint8_t shaA[32];
SHA256(bytesA, blenA, shaA);
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytesA, blenA, shaA));
free(bytesA);
/* But the committed marker references a DIFFERENT hash (injected mismatch:
* the bytes for this marker have NOT arrived out-of-band yet). */
uint8_t shaB[32];
uint64_t tagB = t42_make_ref(shaB, 0x99); /* deterministic != shaA */
TEST_ASSERT_FALSE(memcmp(shaA, shaB, 32) == 0);
t43_commit_marker(c, tagB, shaB);
/* MISMATCH → fenced, NOT activated, member stays alive (returns, no abort). */
TEST_ASSERT_EQUAL_INT(-EAGAIN, config_activate_committed(c));
TEST_ASSERT_EQUAL_INT(1, config_serve_fenced(c));
/* The mismatched marker's config was NOT activated: the active config tag is
* still the locally-held blob A's tag, NEVER the marker's tagB. */
TEST_ASSERT_NOT_EQUAL(tagB, mc->config_version_tag);
/* RETRYING: a second call while still mismatched stays fenced (idempotent,
* never activates mismatched) — the member keeps retrying, alive. */
TEST_ASSERT_EQUAL_INT(-EAGAIN, config_activate_committed(c));
TEST_ASSERT_EQUAL_INT(1, config_serve_fenced(c));
TEST_ASSERT_NOT_EQUAL(tagB, mc->config_version_tag);
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_config_activate_mismatch_fences_and_does_not_activate: PASS\n");
}
/* (4.3-c) OBTAINED-OUT-OF-BAND bytes are verified before activate: a member is
* fenced while the marker's bytes are absent locally; once the matching bytes
* arrive out-of-band (saved exactly as handle_repl_config_push would), the next
* activate hash-verifies them against the marker and activates, clearing the
* fence (R7.5/R7.8). */
static void test_config_activate_obtained_bytes_verified_before_activate(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr43_obtain_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/5, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
/* The marker's referenced bytes. Compute its hash; commit the marker BEFORE
* the bytes are present locally (no conf_save_config yet). */
size_t blen = 0;
uint8_t *bytes = t43_make_config_blob(&blen);
uint8_t sha[32];
SHA256(bytes, blen, sha);
uint64_t tag;
{ uint64_t t; memcpy(&t, sha, 8); tag = be64toh(t); }
t43_commit_marker(c, tag, sha);
/* Bytes NOT present locally yet → fenced, not activated (R7.9). */
TEST_ASSERT_EQUAL_INT(-EAGAIN, config_activate_committed(c));
TEST_ASSERT_EQUAL_INT(1, config_serve_fenced(c));
/* Bytes arrive out-of-band: the config-push transport saves them locally
* exactly as handle_repl_config_push does (conf_save_config). */
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytes, blen, sha));
free(bytes);
/* Now the obtained bytes hash-verify against the committed marker → activate,
* fence clears. */
TEST_ASSERT_EQUAL_INT(0, config_activate_committed(c));
TEST_ASSERT_EQUAL_INT(0, config_serve_fenced(c));
TEST_ASSERT_NOT_NULL(mc->cluster_config);
TEST_ASSERT_EQUAL_HEX64(tag, mc->config_version_tag);
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_config_activate_obtained_bytes_verified_before_activate: PASS\n");
}
/* (4.3-d) RECOVERY activates the LATEST committed marker: with two committed
* markers, config_activate_committed activates the config referenced by the
* LATEST committed marker (the one config_committed_marker derives), obtaining
* its bytes from local out-of-band storage (R7.10). */
static void test_config_activate_recovery_uses_latest_committed_marker(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr43_recover_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/6, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
/* Two distinct configs, each committed as a marker in turn; the LATEST wins. */
size_t blen1 = 0, blen2 = 0;
uint8_t *b1 = t43_make_config_blob(&blen1);
/* Make blob 2 differ so its hash differs from blob 1. */
uint8_t *b2 = t43_make_config_blob(&blen2);
TEST_ASSERT_TRUE(blen2 >= 1);
b2[blen2 - 1] ^= 0xFF; /* perturb → distinct sha */
uint8_t sha1[32], sha2[32];
SHA256(b1, blen1, sha1);
SHA256(b2, blen2, sha2);
TEST_ASSERT_FALSE(memcmp(sha1, sha2, 32) == 0);
uint64_t tag2;
{ uint64_t t; memcpy(&t, sha2, 8); tag2 = be64toh(t); }
uint64_t tag1; { uint64_t t; memcpy(&t, sha1, 8); tag1 = be64toh(t); }
t43_commit_marker(c, tag1, sha1);
t43_commit_marker(c, tag2, sha2);
/* On recovery, the LOCALLY-held bytes are the LATEST config (blob 2 — what the
* out-of-band store holds after the latest push). */
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, b2, blen2, sha2));
free(b1);
free(b2);
/* Activation targets the LATEST committed marker (tag2), hash-verifies the
* local bytes, and activates it. */
TEST_ASSERT_EQUAL_INT(0, config_activate_committed(c));
TEST_ASSERT_EQUAL_INT(0, config_serve_fenced(c));
TEST_ASSERT_EQUAL_HEX64(tag2, mc->config_version_tag);
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_config_activate_recovery_uses_latest_committed_marker: PASS\n");
}
/* ── task 4.3 REMEDIATION r1: production integration of the consumer ───────────
*
* Round-1 review REJECTED 4.3 for three integration gaps, fixed below:
* A — verify-before-activate was BYPASSED on the push path (handle_repl_config_
* push pre-activated via load_primary_config before the gate ran).
* B — recovery-activate had NO production call site (boot loaded blindly).
* C — the serve-fence had NO production reader (ha_dispatch_gate ignored it).
*/
/* (4.3-A) PUSH-PATH SOLE ACTIVATION: config_activate_committed is the SOLE
* activation point. With a committed marker that references DIFFERENT bytes than
* the ones just delivered out-of-band, the push-path sequence (conf_save_config
* then config_activate_committed — NO pre-emptive load_primary_config) must NOT
* make the pushed bytes live (verify-before-activate is a real GATE, not an
* after-the-fact overlay). Regression for Finding A. */
static void test_push_path_mismatch_does_not_preactivate(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr43_pushgate_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/7, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
/* A committed marker references blob B (sha B) — the config the cluster
* agreed to, whose bytes have NOT yet arrived here. */
size_t blenB = 0;
uint8_t *bytesB = t43_make_config_blob(&blenB);
bytesB[blenB - 1] ^= 0x5A; /* perturb → distinct sha */
uint8_t shaB[32];
SHA256(bytesB, blenB, shaB);
uint64_t tagB; { uint64_t t; memcpy(&t, shaB, 8); tagB = be64toh(t); }
t43_commit_marker(c, tagB, shaB);
free(bytesB);
/* The push delivers blob A (a DIFFERENT/older config). The push handler now
* SAVES the bytes but does NOT pre-activate; activation is gated. */
size_t blenA = 0;
uint8_t *bytesA = t43_make_config_blob(&blenA);
uint8_t shaA[32];
SHA256(bytesA, blenA, shaA);
TEST_ASSERT_FALSE(memcmp(shaA, shaB, 32) == 0);
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytesA, blenA, shaA));
free(bytesA);
/* The push-path SOLE activation: gate fences (marker references blob B, not
* the just-saved blob A) and does NOT load blob A. */
TEST_ASSERT_EQUAL_INT(-EAGAIN, config_activate_committed(c));
TEST_ASSERT_EQUAL_INT(1, config_serve_fenced(c));
/* Blob A was NOT made live: no decoded config, no version tag for A. */
TEST_ASSERT_NULL(mc->cluster_config);
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_push_path_mismatch_does_not_preactivate: PASS\n");
}
/* (4.3-A/B) NO-MARKER FALLBACK: when there is NO committed marker yet (legacy /
* first boot, or the marker has not committed), config_activate_committed FALLS
* BACK to the existing load_primary_config behavior — it activates the
* locally-held bytes (so config_version_tag is set for the freshness gate and the
* push ACK) and does NOT fence. Absent-marker is NOT a mismatch. */
static void test_config_activate_no_marker_falls_back_and_loads(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr43_fallback_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/8, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
/* Local bytes present, but NO committed marker exists. */
size_t blen = 0;
uint8_t *bytes = t43_make_config_blob(&blen);
uint8_t sha[32];
SHA256(bytes, blen, sha);
uint64_t tag; { uint64_t t; memcpy(&t, sha, 8); tag = be64toh(t); }
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytes, blen, sha));
free(bytes);
/* No marker → fall back to load_primary_config (blind load), NOT a fence. */
TEST_ASSERT_EQUAL_INT(0, config_activate_committed(c));
TEST_ASSERT_EQUAL_INT(0, config_serve_fenced(c));
TEST_ASSERT_NOT_NULL(mc->cluster_config);
TEST_ASSERT_EQUAL_HEX64(tag, mc->config_version_tag);
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_config_activate_no_marker_falls_back_and_loads: PASS\n");
}
/* ── config-upgrade-snapshot task 6.1: Activation Fence
* (upgrade_materialization_verify / upgrade_materialization_fenced, ha.c)
* ──────────────────────────────────────────────────────────────────────
* These tests reuse this file's own t42_/t43_ fixture helpers rather than
* duplicating them into a new file — the Activation Fence's verify function
* is a close sibling of config_activate_committed (tested just above), and
* every fixture piece it needs (a real cluster_t, a real commit engine, a
* real myconf/config file, real committed WAL_CONFIG_MARKERs) already lives
* here. task 8.3 owns broader dispatch-gate/promotion-gate fence coverage in
* its own new file (test_upgrade_activation_fence.c per design.md); this
* task's own boundary is ha.c/ha.h only, so its tests stay narrowly scoped
* to upgrade_materialization_verify/upgrade_materialization_fenced
* themselves. */
extern int upgrade_materialization_verify(cluster_t *c);
extern int upgrade_materialization_fenced(const cluster_t *c);
/* (6.1-a) No committed marker yet: benign, not a divergence — fence stays
* clear, verify succeeds (mirrors config_activate_committed's own -ENOENT
* handling). */
static void test_upgrade_materialization_verify_no_marker_clears_fence(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_ucaf61_nomarker_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/20, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_verify(c));
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_fenced(c));
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_upgrade_materialization_verify_no_marker_clears_fence: PASS\n");
}
/* (6.1-b) A committed marker exists and its bytes are locally correct and
* hash-verify, AND this member's own checkpoint has already captured a
* reference to it (task 5's marker-triggered checkpoint runs synchronously
* on apply, so t43_commit_marker's wait-for-applied already guarantees this)
* — materialization is genuinely complete, fence clears. */
static void test_upgrade_materialization_verify_matching_materialization_clears_fence(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_ucaf61_match_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/21, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
size_t blen = 0;
uint8_t *bytes = t43_make_config_blob(&blen);
uint8_t sha[32];
SHA256(bytes, blen, sha);
uint64_t tag; { uint64_t t; memcpy(&t, sha, 8); tag = be64toh(t); }
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytes, blen, sha));
free(bytes);
t43_commit_marker(c, tag, sha);
/* Task 5's synchronous marker-triggered checkpoint already ran by the
* time t43_commit_marker (which waits for apply) returns — cfgref_*
* already reflects this exact marker. */
TEST_ASSERT_TRUE(c->persist.cfgref_present);
TEST_ASSERT_EQUAL_HEX64(tag, c->persist.cfgref_tag);
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_verify(c));
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_fenced(c));
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_upgrade_materialization_verify_matching_materialization_clears_fence: PASS\n");
}
/* (6.1-c) A NEW marker commits while an earlier checkpoint is (simulated)
* still in-flight, so THIS marker's own materialization never actually runs
* (task 5's -EBUSY path, Req 4.4) -- config_committed_marker now returns the
* NEW marker but c->persist.cfgref_* still reflects the OLDER one.
* Materialization is genuinely incomplete for the CURRENT marker -> fence
* SETS (distinct from config_serve_fence, which would stay clear here since
* the bytes for the new marker are already present and correct). */
static void test_upgrade_materialization_verify_incomplete_materialization_fences(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_ucaf61_incomplete_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/22, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
/* Marker A: commits, applies, materializes normally (baseline). */
size_t blenA = 0;
uint8_t *bytesA = t43_make_config_blob(&blenA);
uint8_t shaA[32];
SHA256(bytesA, blenA, shaA);
uint64_t tagA; { uint64_t t; memcpy(&t, shaA, 8); tagA = be64toh(t); }
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytesA, blenA, shaA));
free(bytesA);
t43_commit_marker(c, tagA, shaA);
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_verify(c));
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_fenced(c));
TEST_ASSERT_EQUAL_HEX64(tagA, c->persist.cfgref_tag);
/* Marker B: its bytes are saved correctly (config_serve_fence would stay
* clear), but its own checkpoint is forced to skip (-EBUSY) by holding
* the shared checkpoint_in_progress CAS open across the commit -- the
* exact real mechanism task 5's marker-apply case hits under Req 4.4. */
size_t blenB = 0;
uint8_t *bytesB = t43_make_config_blob(&blenB);
/* t43_make_config_blob always produces byte-identical content -- mutate
* a trailing byte so blob B genuinely differs from blob A (this test
* only ever hashes/saves the raw bytes via upgrade_materialization_verify,
* which never parses them as capnp, so a one-byte mutation is safe). */
bytesB[blenB - 1] ^= 0xFF;
uint8_t shaB[32];
SHA256(bytesB, blenB, shaB);
uint64_t tagB; { uint64_t t; memcpy(&t, shaB, 8); tagB = be64toh(t); }
TEST_ASSERT_FALSE(memcmp(shaA, shaB, 32) == 0);
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytesB, blenB, shaB));
free(bytesB);
TEST_ASSERT_EQUAL_INT(
0, atomic_exchange_explicit(&c->persist.checkpoint_in_progress, 1,
memory_order_acq_rel));
uint64_t mlsnB = 0;
TEST_ASSERT_EQUAL_INT(0, config_append_marker(c, tagB, shaB, &mlsnB));
TEST_ASSERT_EQUAL_INT(0, persist_flush(&c->persist));
TEST_ASSERT_EQUAL_INT(0,
commit_submit(&c->commit, mlsnB, COMMIT_MODE_WAIT, 1000));
/* apply runs (marker B's WAL_CONFIG_MARKER case fires and hits -EBUSY on
* the still-held CAS -- treated as expected/self-resolving, not a
* failure, so apply itself succeeds); wait for it directly since
* t43_commit_marker's own wait helper is not used here. */
uint64_t deadline_iters = 200;
while (deadline_iters-- > 0 &&
atomic_load_explicit(&c->persist.last_applied_lsn,
memory_order_acquire) < mlsnB) {
struct timespec ts = { .tv_sec = 0, .tv_nsec = 10 * 1000 * 1000 };
nanosleep(&ts, NULL);
}
TEST_ASSERT_TRUE(atomic_load_explicit(&c->persist.last_applied_lsn,
memory_order_acquire) >= mlsnB);
/* Release the simulated in-flight checkpoint now that marker B's apply
* (and its -EBUSY'd checkpoint attempt) has already happened. */
atomic_store_explicit(&c->persist.checkpoint_in_progress, 0,
memory_order_release);
/* config_committed_marker now authoritatively returns marker B, but this
* member's own materialization never ran for it (cfgref_tag is still A)
* -- genuinely incomplete, not a bytes mismatch. */
TEST_ASSERT_EQUAL_HEX64(tagA, c->persist.cfgref_tag);
TEST_ASSERT_EQUAL_INT(-EAGAIN, upgrade_materialization_verify(c));
TEST_ASSERT_EQUAL_INT(1, upgrade_materialization_fenced(c));
/* Idempotent retry: calling again while still genuinely unresolved stays
* fenced, does not error/crash/toggle unexpectedly. */
TEST_ASSERT_EQUAL_INT(-EAGAIN, upgrade_materialization_verify(c));
TEST_ASSERT_EQUAL_INT(1, upgrade_materialization_fenced(c));
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_upgrade_materialization_verify_incomplete_materialization_fences: PASS\n");
}
/* (6.1-d) Materialization for the current marker DID complete (cfgref_*
* correctly captured it, matching), but the LOCAL config file has since been
* overwritten with different bytes (without a new marker committing) --
* simulates the exact "stale embedded copy" trap design.md warns about.
* A correct implementation re-reads the LIVE bytes fresh every call rather
* than trusting cfgref_sha (a checkpoint-time reference) -- so this MUST
* fence, proving the fresh re-read actually happens. */
static void test_upgrade_materialization_verify_stale_local_bytes_after_materialization_fences(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_ucaf61_stale_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/23, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
size_t blen = 0;
uint8_t *bytes = t43_make_config_blob(&blen);
uint8_t sha[32];
SHA256(bytes, blen, sha);
uint64_t tag; { uint64_t t; memcpy(&t, sha, 8); tag = be64toh(t); }
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytes, blen, sha));
free(bytes);
t43_commit_marker(c, tag, sha);
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_verify(c));
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_fenced(c));
/* The local config file is overwritten with DIFFERENT bytes, without any
* new marker committing (simulates local corruption/drift, or a config
* push that lands out of order) -- config_committed_marker still
* returns the SAME marker/sha as before. */
size_t blen2 = 0;
uint8_t *bytes2 = t43_make_config_blob(&blen2);
/* t43_make_config_blob always produces byte-identical content -- mutate
* a trailing byte so the "overwritten" bytes genuinely differ. */
bytes2[blen2 - 1] ^= 0xFF;
uint8_t sha2[32];
SHA256(bytes2, blen2, sha2);
TEST_ASSERT_FALSE(memcmp(sha, sha2, 32) == 0);
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytes2, blen2, sha2));
free(bytes2);
/* cfgref_sha (captured at checkpoint time) still shows the OLD matching
* value -- a naive implementation trusting it would wrongly stay clear.
* The correct implementation re-reads the file fresh and fences. */
TEST_ASSERT_EQUAL_HEX64(tag, c->persist.cfgref_tag);
TEST_ASSERT_EQUAL_INT(-EAGAIN, upgrade_materialization_verify(c));
TEST_ASSERT_EQUAL_INT(1, upgrade_materialization_fenced(c));
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_upgrade_materialization_verify_stale_local_bytes_after_materialization_fences: PASS\n");
}
/* (4.3-C) FENCE IS ENFORCED by a production reader: while the config serve-fence
* is set, ha_dispatch_gate refuses config-dependent state-changing operations on
* the PRIMARY (loud non-serving, member stays alive) and a fenced member is
* non-promotable (ha_config_promotion_fenced). Read-only/replication ops still
* pass so the bytes can arrive out-of-band. Once correct bytes arrive and
* re-verify clears the fence, the member serves again. Regression for Finding C. */
static void test_serve_fence_enforced_by_dispatch_gate_and_promotion(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr43_fence_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/9, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
/* The committed config (blob TARGET) whose bytes have not yet arrived. */
size_t tlen = 0;
uint8_t *tbytes = t43_make_config_blob(&tlen);
uint8_t tsha[32];
SHA256(tbytes, tlen, tsha);
uint64_t ttag; { uint64_t t; memcpy(&t, tsha, 8); ttag = be64toh(t); }
t43_commit_marker(c, ttag, tsha);
/* Stale local bytes (blob A) that do NOT match the committed marker. */
size_t alen = 0;
uint8_t *abytes = t43_make_config_blob(&alen);
abytes[alen - 1] ^= 0x33;
uint8_t asha[32];
SHA256(abytes, alen, asha);
TEST_ASSERT_FALSE(memcmp(asha, tsha, 32) == 0);
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, abytes, alen, asha));
free(abytes);
/* Mismatch → fenced. */
TEST_ASSERT_EQUAL_INT(-EAGAIN, config_activate_committed(c));
TEST_ASSERT_EQUAL_INT(1, config_serve_fenced(c));
/* PRODUCTION READER: a fenced PRIMARY refuses config-dependent state-changing
* ops (loud non-serving) but stays alive — the gate returns an error, not a
* crash/exit. */
TEST_ASSERT_TRUE(ha_dispatch_gate(&c->ha, OPCode_jobsub) < 0);
/* Replication / read-only ops still pass so the correct bytes can arrive. */
TEST_ASSERT_EQUAL_INT(0, ha_dispatch_gate(&c->ha, OPCode_replConfigPush));
TEST_ASSERT_EQUAL_INT(0, ha_dispatch_gate(&c->ha, OPCode_get));
/* Non-promotable while fenced. */
TEST_ASSERT_EQUAL_INT(1, ha_config_promotion_fenced(&c->ha));
/* Correct bytes arrive out-of-band (saved as the push handler would). */
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, tbytes, tlen, tsha));
free(tbytes);
/* Re-verify clears the fence → member serves and is promotable again. */
TEST_ASSERT_EQUAL_INT(0, config_activate_committed(c));
TEST_ASSERT_EQUAL_INT(0, config_serve_fenced(c));
TEST_ASSERT_EQUAL_HEX64(ttag, mc->config_version_tag);
/* config-upgrade-snapshot task 6.2 remediation: t43_commit_marker above
* drives the TARGET marker through the REAL apply path, which (as of
* the 6.2 fix) makes apply_committed_entry's WAL_CONFIG_MARKER case
* (persist.c) unconditionally re-evaluate the separate, independent
* upgrade_materialization_fence too -- not just config_serve_fence,
* which is all this test is otherwise about. At that moment the TARGET
* bytes had not arrived locally yet (this test's own deliberate setup,
* to exercise config_serve_fence), so that checkpoint's
* scan_latest_committed_config_ref already stamped cfgref_{tag,sha}
* from the marker itself (materialized-reference present), but the
* live-bytes hash-check genuinely failed (no local bytes yet) --
* correctly setting upgrade_materialization_fence too, per Req 3.2.
* That is orthogonal, correct behavior, not a bug in either fence, but
* this test never previously accounted for it (the fence was
* unreachable before the 6.2 fix). Re-verify it here now that the
* correct bytes are locally present, mirroring config_activate_
* committed's own re-verify just above for config_serve_fence, so the
* remaining assertions below exercise only the fence this test is
* actually about. */
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_verify(c));
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_fenced(c));
TEST_ASSERT_EQUAL_INT(0, ha_dispatch_gate(&c->ha, OPCode_jobsub));
TEST_ASSERT_EQUAL_INT(0, ha_config_promotion_fenced(&c->ha));
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_serve_fence_enforced_by_dispatch_gate_and_promotion: PASS\n");
}
/* Append a WAL_CONFIG_MARKER for `sha`/`tag` and flush it to the WAL, but do NOT
* advance the committed prefix past it — returns its LSN. Models a STANDBY whose
* local WAL tip runs ahead of its committed_lsn: on a standby committed_lsn is
* driven by the primary's commit-advance (commit_set_raft_commit_index / the
* library), NOT by local durability, so a flushed-but-not-yet-committed marker is
* the real push-before-commit state. The caller pins committed_lsn back to the
* prior value (see the test) so config_committed_marker still derives the OLDER
* marker until the NEW one is explicitly committed. */
static uint64_t t43_append_marker_uncommitted(cluster_t *c, uint64_t tag,
const uint8_t sha[32])
{
uint64_t mlsn = 0;
TEST_ASSERT_EQUAL_INT(0, config_append_marker(c, tag, sha, &mlsn));
TEST_ASSERT_EQUAL_INT(0, persist_flush(&c->persist));
/* config-upgrade-snapshot task 5 finding: config_append_marker's returned
* lsn (via ha_primary_log_append -> raft_log_append's own s->log_len + 1)
* is only reliable when EVERY prior WAL entry on this node went through
* that same raft-tracked append path. A marker-triggered checkpoint (this
* spec) writes its own local-only, never-replicated WAL_CHECKPOINT entry
* directly (persist_write_checkpoint_marker), which advances
* persist_t's current_lsn WITHOUT a corresponding raft_log_append call --
* this was already possible before this spec (the periodic WAL-threshold
* checkpoint trigger does the same), but this spec's marker-triggered
* checkpoint makes it the COMMON case for any second marker appended
* after an earlier one's checkpoint has already run, exactly this
* fixture's own scenario. The returned mlsn can then under-count the
* entry's TRUE physical position. This does not corrupt commit/durability
* tracking (commit_advance_locked's majority_candidate_locked is driven
* entirely by persist_t's own durable_lsn/current_lsn, never by
* s->log_len -- see commit.c) but it DOES make the returned value
* unreliable for this test's own strict numeric-ordering comparisons.
* Read the TRUE physical lsn directly instead, exactly as production
* code that needs precise positioning (e.g. persist.c's apply seam,
* which receives lsn from the WAL entry's own on-disk header, never from
* this return value) already effectively does. */
return c->persist.current_lsn - 1;
}
/* (4.3-D / R7.9) COMMIT-ADVANCE RETRY clears a push-before-commit fence: the
* config MARKER (WAL) and config BYTES (out-of-band push) arrive on INDEPENDENT
* transports. On a 2nd upgrade the NEW bytes are saved BEFORE the NEW marker
* enters the committed prefix, so config_committed_marker still returns the OLDER
* marker → the freshly-saved NEW bytes hash-MISMATCH it → the member is serve-
* FENCED. The NEW marker commits later via the WAL path, but on_commit_advanced
* cannot re-activate (no disk I/O on the iomgr ACK thread) and the primary's
* config-behind re-push net does not fire (the push already advanced the advertised
* tag) — WITHOUT the commit-advance retry trigger the standby would stay
* PERMANENTLY fenced. This test reproduces that ordering and asserts the retry
* trigger (config_activate_retry_fn — the SAME off-thread entry the production
* scheduler enqueues) CLEARS the fence and activates the NEW config once the NEW
* marker is committed. Regression for Finding D.
*
* The single-member commit engine advances committed_lsn to the durable WAL tip,
* so to hold the NEW marker out of the committed prefix this test PINS
* committed_lsn at the OLD marker's LSN (modeling a standby whose committed prefix
* lags its local WAL tip), then advances it past the NEW marker to model the NEW
* marker committing via the WAL path. */
static void test_commit_advance_retry_clears_push_before_commit_fence(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr43_retry_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/10, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
/* ── Upgrade 1 (OLD): commit OLD marker + save OLD bytes + activate. The
* member is UN-fenced and serving the OLD config. ───────────────────────── */
size_t blenO = 0;
uint8_t *bytesO = t43_make_config_blob(&blenO);
uint8_t shaO[32];
SHA256(bytesO, blenO, shaO);
uint64_t tagO; { uint64_t t; memcpy(&t, shaO, 8); tagO = be64toh(t); }
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytesO, blenO, shaO));
free(bytesO);
t43_commit_marker(c, tagO, shaO);
TEST_ASSERT_EQUAL_INT(0, config_activate_committed(c));
TEST_ASSERT_EQUAL_INT(0, config_serve_fenced(c));
TEST_ASSERT_EQUAL_HEX64(tagO, mc->config_version_tag);
/* The OLD marker is the committed prefix boundary the standby currently sees. */
uint64_t committed_at_old =
atomic_load_explicit(&c->persist.committed_lsn, memory_order_acquire);
/* ── Upgrade 2 (NEW): the BYTES arrive (and are saved) BEFORE the NEW marker
* enters the committed prefix — the push-before-commit ordering. ────────── */
size_t blenN = 0;
uint8_t *bytesN = t43_make_config_blob(&blenN);
bytesN[blenN - 1] ^= 0xA5; /* perturb → distinct sha */
uint8_t shaN[32];
SHA256(bytesN, blenN, shaN);
uint64_t tagN; { uint64_t t; memcpy(&t, shaN, 8); tagN = be64toh(t); }
TEST_ASSERT_FALSE(memcmp(shaO, shaN, 32) == 0);
/* The NEW marker is APPENDED + flushed to the WAL (local tip advances).
* bug-1469 fix interaction: flushing makes durable_lsn advance, and this
* single-member fixture's commit engine (majority=1) reacts to ANY
* durable advance by racing committed_lsn forward on its OWN background
* fsync-worker thread (commit_on_durable_advance) -- which, since
* apply_committed_entry's WAL_CONFIG_MARKER case now ALSO activates
* config (bug-1469), could apply-and-activate this NEW marker for real
* before this test's own thread gets a chance to pin committed_lsn back
* down below it. PIN IMMEDIATELY, right here, before any other work
* (previously this pin lived after conf_save_config below, leaving a
* multi-syscall window — several real fsyncs — for that background race
* to win against a single-member fixture's over-eager auto-commit,
* something a real multi-node standby never does since its
* committed_lsn is solely driven by the primary's commit-advance, never
* local durability). */
uint64_t new_mlsn = t43_append_marker_uncommitted(c, tagN, shaN);
TEST_ASSERT_TRUE(new_mlsn > committed_at_old);
atomic_store_explicit(&c->persist.committed_lsn, committed_at_old,
memory_order_release);
/* The OLD config is currently LIVE (activated in upgrade 1). Capture the live
* decoded-config pointer as the activation witness: load_primary_config frees
* and reallocates mc->cluster_config, so a CHANGED pointer proves a (re)load
* happened. conf_save_config (below) only writes bytes + bumps the advertised
* config_version_tag — it does NOT decode/activate — so it must NOT change this
* pointer; only a successful config_activate_committed does. */
cluster_config_t *live_before = mc->cluster_config;
TEST_ASSERT_NOT_NULL(live_before);
/* The NEW bytes are saved out-of-band (exactly as handle_repl_config_push
* does). Note conf_save_config in this single-member fixture re-evaluates the
* commit barrier, which would advance committed_lsn to the durable WAL tip, and
* it bumps the advertised config_version_tag to tagN (this is the very reason
* the primary's config-behind re-push net does not re-fire — Finding D); we
* already pinned committed_lsn back below the NEW marker immediately above (to
* model a standby whose committed prefix, driven by the primary's commit-
* advance, not local durability, has NOT yet advanced past the NEW marker) —
* re-pin again here for defense-in-depth against the same race. */
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytesN, blenN, shaN));
atomic_store_explicit(&c->persist.committed_lsn, committed_at_old,
memory_order_release);
/* Activate now: config_committed_marker still returns the OLDER marker (tagO),
* so the freshly-saved NEW bytes MISMATCH it → serve-FENCED, NEW config NOT
* ACTIVATED. The live decoded config is UNCHANGED (still the OLD one) — the
* mismatch gate never loaded the NEW bytes. This is the permanent-fence state
* the retry trigger must rescue. */
TEST_ASSERT_EQUAL_INT(-EAGAIN, config_activate_committed(c));
TEST_ASSERT_EQUAL_INT(1, config_serve_fenced(c));
TEST_ASSERT_TRUE(mc->cluster_config == live_before); /* NEW not activated */
/* ── The NEW marker COMMITS later via the WAL path (the standby's committed
* prefix advances past it, as the primary's commit-advance heartbeat would
* drive). config_committed_marker now derives the NEW marker. ───────────── */
atomic_store_explicit(&c->persist.committed_lsn, new_mlsn,
memory_order_release);
/* DRIVE THE RETRY TRIGGER: the SAME off-thread activation entry the production
* commit-advance path schedules (ha_cb_commit_advanced_stub →
* config_schedule_activate_retry → delaymgr → config_activate_retry_fn). In
* production the delaymgr worker runs this OFF the iomgr ACK thread; here we
* invoke the entry directly (the fixture's delaymgr is not started). Now
* config_committed_marker returns the NEW marker and the saved NEW bytes
* hash-verify → the fence CLEARS and the NEW config ACTIVATES (cluster_config
* is reloaded — a fresh pointer). */
TEST_ASSERT_EQUAL_INT(0, config_activate_retry_fn(c));
TEST_ASSERT_EQUAL_INT(0, config_serve_fenced(c)); /* fence CLEARED */
TEST_ASSERT_EQUAL_HEX64(tagN, mc->config_version_tag); /* NEW now live */
TEST_ASSERT_NOT_NULL(mc->cluster_config);
TEST_ASSERT_TRUE(mc->cluster_config != live_before); /* (re)loaded NEW */
free(bytesN);
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_commit_advance_retry_clears_push_before_commit_fence: PASS\n");
}
/* ── config-upgrade-snapshot task 6.2: Activation Fence gate composition +
* self-triggering retry (upgrade_materialization_fenced / ha_dispatch_gate /
* raft_cb_become_leader / schedule_upgrade_materialization_retry, ha.c) ────
*
* These tests reuse this file's own t42_/t43_ fixture helpers and mirror
* the existing (4.3-C/D) config_serve_fence gate-composition/retry tests
* above as the direct template, for the new independent
* upgrade_materialization_fence instead.
*/
/* raft_cb_become_leader is file-static; drive it through the LIVE-cluster
* XCE_TESTING seam (fix-promotion-standby-registration) so this test proves
* the REAL election-time promotion decision refuses while fenced, not just a
* proxy accessor read. */
extern void raft_cb_become_leader_with_cluster_for_test(cluster_t *c,
uint64_t term);
/* ha-term-safety task 2.4: drive the WIRED on_commit_advanced callback
* (ha_cb_commit_advanced_stub) so the wiring test below exercises the real
* commit-advance trigger, not a hand-rolled call. */
extern void ha_cb_commit_advanced_for_test(ha_state_t *ha,
uint64_t commit_index);
/* (6.2-a) UPGRADE MATERIALIZATION FENCE IS ENFORCED by two production
* readers: (1) ha_dispatch_gate refuses a config-dependent state-changing
* operation on the PRIMARY while fenced (loud non-serving, member stays
* alive) but keeps replication/read-only ops flowing so materialization can
* proceed and re-verify; (2) a REAL election-time promotion attempt
* (raft_cb_become_leader_with_cluster_for_test — the actual gate, not a proxy
* accessor) refuses to become CTRL_PRIMARY while this member's own
* materialization for the current committed marker is incomplete. Regression
* for the dispatch-gate/promotion-gate composition (Req 3.2, 3.3, 4.3, 5.5).
*/
static void test_upgrade_materialization_fence_enforced_by_dispatch_gate_and_promotion(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr62_fence_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/40, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
/* Commit a marker but never checkpoint against it -- this member's own
* materialization is genuinely incomplete for it (identical setup to
* test_upgrade_materialization_verify_matching_materialization_clears_fence's
* sibling incomplete-materialization test, just without the -EBUSY
* choreography -- a fresh marker with no checkpoint yet run is already
* incomplete by construction). */
size_t blen = 0;
uint8_t *bytes = t43_make_config_blob(&blen);
uint8_t sha[32];
SHA256(bytes, blen, sha);
uint64_t tag; { uint64_t t; memcpy(&t, sha, 8); tag = be64toh(t); }
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytes, blen, sha));
free(bytes);
/* Force materialization to stay incomplete for THIS marker: hold the
* shared checkpoint_in_progress CAS open across the commit (the same
* mechanism test_upgrade_materialization_verify_incomplete_materialization_
* fences uses), so the marker-apply checkpoint hits -EBUSY and cfgref_*
* never advances to it. */
TEST_ASSERT_EQUAL_INT(
0, atomic_exchange_explicit(&c->persist.checkpoint_in_progress, 1,
memory_order_acq_rel));
uint64_t mlsn = 0;
TEST_ASSERT_EQUAL_INT(0, config_append_marker(c, tag, sha, &mlsn));
TEST_ASSERT_EQUAL_INT(0, persist_flush(&c->persist));
TEST_ASSERT_EQUAL_INT(0,
commit_submit(&c->commit, mlsn, COMMIT_MODE_WAIT, 1000));
uint64_t deadline_iters = 200;
while (deadline_iters-- > 0 &&
atomic_load_explicit(&c->persist.last_applied_lsn,
memory_order_acquire) < mlsn) {
struct timespec ts = { .tv_sec = 0, .tv_nsec = 10 * 1000 * 1000 };
nanosleep(&ts, NULL);
}
atomic_store_explicit(&c->persist.checkpoint_in_progress, 0,
memory_order_release);
TEST_ASSERT_EQUAL_INT(-EAGAIN, upgrade_materialization_verify(c));
TEST_ASSERT_EQUAL_INT(1, upgrade_materialization_fenced(c));
/* PRODUCTION READER 1: ha_dispatch_gate refuses a state-changing op on
* the fenced PRIMARY but stays alive (error, not crash/exit). */
TEST_ASSERT_TRUE(ha_dispatch_gate(&c->ha, OPCode_jobsub) < 0);
/* Replication / read-only ops still pass. */
TEST_ASSERT_EQUAL_INT(0, ha_dispatch_gate(&c->ha, OPCode_heartbeat));
TEST_ASSERT_EQUAL_INT(0, ha_dispatch_gate(&c->ha, OPCode_get));
/* PRODUCTION READER 2: a real election-time promotion attempt refuses to
* become CTRL_PRIMARY while fenced. ha_primary_log_append above only
* required c->ha.raft.role == RAFT_LEADER (set by t42_make_leader), not
* ha->role == CTRL_PRIMARY, so resetting ha->role to CTRL_ELECTING here
* to observe a genuine promotion decision does not disturb the marker
* already committed above. */
c->ha.phase2_done = 1; /* skip cluster_init_phase2 -- unrelated first-boot path */
atomic_store_explicit(&c->ha.role, (int32_t)CTRL_ELECTING,
memory_order_release);
raft_cb_become_leader_with_cluster_for_test(c, /*term*/40);
TEST_ASSERT_NOT_EQUAL_MESSAGE(
(int32_t)CTRL_PRIMARY,
atomic_load_explicit(&c->ha.role, memory_order_acquire),
"config-upgrade-snapshot task 6.2 (Req 3.2/3.3/4.3/5.5): a member "
"whose own upgrade-snapshot materialization is incomplete must NOT "
"be promoted to CTRL_PRIMARY");
TEST_ASSERT_EQUAL_INT(1, upgrade_materialization_fenced(c)); /* unaffected */
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_upgrade_materialization_fence_enforced_by_dispatch_gate_and_promotion: PASS\n");
}
/* (6.2-b) schedule_upgrade_materialization_retry is a no-op when NOT fenced
* -- steady state schedules nothing (no busy-spin), mirroring
* config_schedule_activate_retry's own documented no-op behavior. */
static void test_schedule_upgrade_materialization_retry_noop_when_not_fenced(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr62_retry_noop_unfenced_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/41, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_fenced(c)); /* fixture default: unfenced */
TEST_ASSERT_FALSE(c->delaymgr.running); /* fixture never starts delaymgr */
TEST_ASSERT_EQUAL_INT(0, schedule_upgrade_materialization_retry(c));
t42_teardown(c);
printf("test_schedule_upgrade_materialization_retry_noop_when_not_fenced: PASS\n");
}
/* (6.2-c) schedule_upgrade_materialization_retry is a no-op when the
* delaymgr is not running, even while fenced -- the unit-test fixture path
* (mirrors config_schedule_activate_retry's own documented delaymgr-not-
* running no-op; test_commit_advance_retry_clears_push_before_commit_fence
* relies on this same fixture property to drive its retry entry directly). */
static void test_schedule_upgrade_materialization_retry_noop_when_delaymgr_not_running(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr62_retry_noop_nodmgr_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/42, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
size_t blen = 0;
uint8_t *bytes = t43_make_config_blob(&blen);
uint8_t sha[32];
SHA256(bytes, blen, sha);
uint64_t tag; { uint64_t t; memcpy(&t, sha, 8); tag = be64toh(t); }
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytes, blen, sha));
free(bytes);
t43_commit_marker(c, tag, sha);
/* Overwrite the local bytes without a new marker committing -- the same
* "stale local bytes" fence trigger
* test_upgrade_materialization_verify_stale_local_bytes_after_
* materialization_fences uses -- so the fence is genuinely SET without
* needing the -EBUSY checkpoint choreography. */
size_t blen2 = 0;
uint8_t *bytes2 = t43_make_config_blob(&blen2);
bytes2[blen2 - 1] ^= 0xFF;
uint8_t sha2[32];
SHA256(bytes2, blen2, sha2);
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytes2, blen2, sha2));
free(bytes2);
TEST_ASSERT_EQUAL_INT(-EAGAIN, upgrade_materialization_verify(c));
TEST_ASSERT_EQUAL_INT(1, upgrade_materialization_fenced(c));
TEST_ASSERT_FALSE(c->delaymgr.running);
/* delaymgr not running -- no-op, returns 0, does not crash/leak a task. */
TEST_ASSERT_EQUAL_INT(0, schedule_upgrade_materialization_retry(c));
TEST_ASSERT_EQUAL_INT(1, upgrade_materialization_fenced(c)); /* still fenced -- untouched */
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_schedule_upgrade_materialization_retry_noop_when_delaymgr_not_running: PASS\n");
}
/* (6.2-d) upgrade_materialization_retry_fn -- the same off-thread entry
* point schedule_upgrade_materialization_retry's trampoline would enqueue in
* production -- stays fenced (-EAGAIN) while the genuine mismatch persists,
* then CLEARS the fence once the live bytes are corrected to match the
* committed marker, without a new marker needing to commit. Mirrors
* config_activate_retry_fn's own direct-drive regression
* (test_commit_advance_retry_clears_push_before_commit_fence). */
static void test_upgrade_materialization_retry_fn_recovers_from_stale_bytes_fence(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr62_retry_fn_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/43, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
size_t blen = 0;
uint8_t *bytes = t43_make_config_blob(&blen);
uint8_t sha[32];
SHA256(bytes, blen, sha);
uint64_t tag; { uint64_t t; memcpy(&t, sha, 8); tag = be64toh(t); }
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytes, blen, sha));
t43_commit_marker(c, tag, sha);
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_verify(c));
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_fenced(c));
/* Local bytes are overwritten with DIFFERENT content, without a new
* marker committing -- cfgref_* still shows the old matching reference,
* but a fresh live re-read must fence (same trap 6.1-d proves for
* upgrade_materialization_verify itself). */
size_t blenX = 0;
uint8_t *bytesX = t43_make_config_blob(&blenX);
bytesX[blenX - 1] ^= 0xA5;
uint8_t shaX[32];
SHA256(bytesX, blenX, shaX);
TEST_ASSERT_FALSE(memcmp(sha, shaX, 32) == 0);
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytesX, blenX, shaX));
free(bytesX);
TEST_ASSERT_EQUAL_INT(-EAGAIN, upgrade_materialization_verify(c));
TEST_ASSERT_EQUAL_INT(1, upgrade_materialization_fenced(c));
/* Drive the retry entry directly while the mismatch is still genuine:
* stays fenced, does not crash/toggle incorrectly. */
TEST_ASSERT_EQUAL_INT(-EAGAIN, upgrade_materialization_retry_fn(c));
TEST_ASSERT_EQUAL_INT(1, upgrade_materialization_fenced(c));
/* Restore the CORRECT bytes (matching the still-current committed
* marker) without any new marker commit -- models the out-of-band
* config-push bytes finally arriving/correcting. */
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytes, blen, sha));
free(bytes);
/* Drive the retry entry again: re-verify now succeeds -- fence CLEARS. */
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_retry_fn(c));
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_fenced(c));
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_upgrade_materialization_retry_fn_recovers_from_stale_bytes_fence: PASS\n");
}
/* (6.2-e) WIRING: the commit-advance path (ha_cb_commit_advanced_stub, the
* WIRED on_commit_advanced callback) consults upgrade_materialization_fenced
* and calls schedule_upgrade_materialization_retry when fenced -- driven
* through the REAL wired callback (ha_cb_commit_advanced_for_test), not a
* hand-rolled call, so this proves the actual call-site wiring executes
* without crashing/corrupting state. schedule_upgrade_materialization_retry
* itself is a no-op in this fixture (delaymgr not running -- proven in
* isolation by 6.2-c above), so the fence is expected to remain SET
* afterward; this test's contribution is exercising the NEW branch at the
* real call site itself, not re-proving the no-op contract. */
static void test_commit_advance_wiring_calls_upgrade_materialization_schedule_retry(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr62_wiring_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/44, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
size_t blen = 0;
uint8_t *bytes = t43_make_config_blob(&blen);
uint8_t sha[32];
SHA256(bytes, blen, sha);
uint64_t tag; { uint64_t t; memcpy(&t, sha, 8); tag = be64toh(t); }
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytes, blen, sha));
free(bytes);
t43_commit_marker(c, tag, sha);
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_verify(c));
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_fenced(c));
/* Overwrite local bytes (stale-bytes trigger, same as 6.2-c) to fence
* without a new marker. */
size_t blen2 = 0;
uint8_t *bytes2 = t43_make_config_blob(&blen2);
bytes2[blen2 - 1] ^= 0xFF;
uint8_t sha2[32];
SHA256(bytes2, blen2, sha2);
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytes2, blen2, sha2));
free(bytes2);
TEST_ASSERT_EQUAL_INT(-EAGAIN, upgrade_materialization_verify(c));
TEST_ASSERT_EQUAL_INT(1, upgrade_materialization_fenced(c));
uint64_t committed_lsn =
atomic_load_explicit(&c->persist.committed_lsn, memory_order_acquire);
/* Drive the REAL wired commit-advance callback -- must not crash, must
* not corrupt the fence state (schedule_upgrade_materialization_retry's
* own no-op-when-delaymgr-not-running contract keeps it SET). */
ha_cb_commit_advanced_for_test(&c->ha, committed_lsn);
TEST_ASSERT_EQUAL_INT(1, upgrade_materialization_fenced(c));
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_commit_advance_wiring_calls_upgrade_materialization_schedule_retry: PASS\n");
}
/* ── bug-1477: ha_phase2_retry_fn / ha_schedule_phase2_retry ─────────────────
*
* A node that takes myapp_run's skip_election passive path (bug-849 --
* "leader already known after the startup stagger") makes exactly ONE
* cluster_init_phase2 attempt. Before this fix, EVERY call site (myapp.c's
* skip_election block, raft_cb_become_leader, raft_cb_become_follower,
* ha_elect_evaluate_and_signal's two branches) latched ha->phase2_done = 1
* UNCONDITIONALLY, regardless of cluster_init_phase2's return value. If that
* one attempt raced config availability and failed, the node was left
* permanently stuck: commit_engine_init never ran, so apply_committed_entry
* never applied ANY committed WAL entry for the rest of that process's
* lifetime -- and since a skip_election node never again contests an
* election, none of the other four call sites, which only fire via THIS
* node's own raft-library state transitions, ever ran again either.
*
* ha_phase2_retry_fn is the idempotent retry entry (mirrors
* upgrade_materialization_retry_fn's shape); ha_schedule_phase2_retry is its
* delaymgr-scheduled, self-limiting trigger (mirrors
* schedule_upgrade_materialization_retry's no-op guards). */
/* (bug-1477-a) ha_phase2_retry_fn is a no-op once phase2_done is already
* set -- does not re-invoke the hook, returns 0. */
static void test_ha_phase2_retry_fn_noop_when_already_done(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr1477_retry_noop_done_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
c->ha.phase2_done = 1;
TEST_ASSERT_EQUAL_INT(0, ha_phase2_retry_fn(c));
TEST_ASSERT_EQUAL_INT(1, c->ha.phase2_done);
t42_teardown(c);
printf("test_ha_phase2_retry_fn_noop_when_already_done: PASS\n");
}
static _Atomic int g_cr1477_hook_calls;
static _Atomic int g_cr1477_hook_fail_first_n;
/* Fails the first g_cr1477_hook_fail_first_n calls (rc=-EAGAIN), succeeds
* (rc=0) thereafter -- models cluster_init_phase2 racing config
* availability and then succeeding once it arrives. */
static int cr1477_flaky_phase2_hook(void *c)
{
(void)c;
int n = atomic_fetch_add(&g_cr1477_hook_calls, 1);
return (n < atomic_load(&g_cr1477_hook_fail_first_n)) ? -EAGAIN : 0;
}
/* (bug-1477-b) THE CORE REGRESSION: a failed cluster_init_phase2 attempt
* must NOT latch phase2_done -- RED under the pre-fix code (which set
* phase2_done = 1 unconditionally right after calling the hook, regardless
* of its return value; this assertion would fail immediately). A second
* call, once the underlying condition clears, then succeeds and latches. */
static void test_ha_phase2_retry_fn_does_not_latch_on_failure_and_succeeds_on_retry(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr1477_retry_fn_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
TEST_ASSERT_EQUAL_INT(0, c->ha.phase2_done); /* fixture default: not done */
atomic_store(&g_cr1477_hook_calls, 0);
atomic_store(&g_cr1477_hook_fail_first_n, 1);
ha_phase2_hook = cr1477_flaky_phase2_hook;
/* First attempt: hook fails -- phase2_done must stay 0 (bug-1477's own
* regression assertion). */
TEST_ASSERT_EQUAL_INT(-EAGAIN, ha_phase2_retry_fn(c));
TEST_ASSERT_EQUAL_INT_MESSAGE(0, c->ha.phase2_done,
"a failed cluster_init_phase2 attempt must not latch phase2_done "
"(bug-1477 -- the pre-fix code did this unconditionally, "
"permanently stranding the member)");
/* Second attempt: hook now succeeds -- phase2_done latches. */
TEST_ASSERT_EQUAL_INT(0, ha_phase2_retry_fn(c));
TEST_ASSERT_EQUAL_INT(1, c->ha.phase2_done);
/* Idempotent: a third call is a pure no-op (hook not re-invoked). */
int calls_before = atomic_load(&g_cr1477_hook_calls);
TEST_ASSERT_EQUAL_INT(0, ha_phase2_retry_fn(c));
TEST_ASSERT_EQUAL_INT(calls_before, atomic_load(&g_cr1477_hook_calls));
ha_phase2_hook = NULL; /* restore -- shared process-global test seam */
t42_teardown(c);
printf("test_ha_phase2_retry_fn_does_not_latch_on_failure_and_succeeds_on_retry: PASS\n");
}
/* (bug-1477-c) ha_schedule_phase2_retry is a no-op when phase2_done is
* already set -- steady state schedules nothing (no busy-spin), mirroring
* schedule_upgrade_materialization_retry's own documented no-op behavior. */
static void test_schedule_phase2_retry_noop_when_already_done(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr1477_sched_noop_done_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
c->ha.phase2_done = 1;
TEST_ASSERT_FALSE(c->delaymgr.running); /* fixture never starts delaymgr */
TEST_ASSERT_EQUAL_INT(0, ha_schedule_phase2_retry(c));
t42_teardown(c);
printf("test_schedule_phase2_retry_noop_when_already_done: PASS\n");
}
/* (bug-1477-d) ha_schedule_phase2_retry is a no-op when the delaymgr is not
* running, even while phase2_done is still 0 -- the unit-test fixture path
* (mirrors config_schedule_activate_retry / schedule_upgrade_materialization_
* retry's own documented delaymgr-not-running no-op). */
static void test_schedule_phase2_retry_noop_when_delaymgr_not_running(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr1477_sched_noop_nodmgr_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
TEST_ASSERT_EQUAL_INT(0, c->ha.phase2_done);
TEST_ASSERT_FALSE(c->delaymgr.running);
TEST_ASSERT_EQUAL_INT(0, ha_schedule_phase2_retry(c));
TEST_ASSERT_EQUAL_INT(0, c->ha.phase2_done); /* untouched -- no-op */
t42_teardown(c);
printf("test_schedule_phase2_retry_noop_when_delaymgr_not_running: PASS\n");
}
/* ── config-upgrade-snapshot task 6.2 remediation: Activation Fence set by a
* REAL production trigger, not a direct test call ──────────────────────────
*
* Every test above (6.2-a..e, and 6.1's own 4 tests earlier in this file)
* reaches the fenced state by calling upgrade_materialization_verify()
* directly in the test body. That proves the fence's own logic is correct,
* but NOT that a running production controller can ever reach the fenced
* state in the first place: every PRODUCTION call path to
* upgrade_materialization_verify() -- upgrade_materialization_retry_fn, and
* both of ITS callers (schedule_upgrade_materialization_retry and the
* commit-advance hook in ha_cb_commit_advanced_stub) -- is itself gated on
* upgrade_materialization_fenced() already being true. Starting from the
* fence's zero-initialized (unfenced) default, that is a closed loop with
* no entry point: nothing in production could ever set the fence for the
* first time, which made the dispatch-gate/promotion-gate checks in 6.2-a
* permanently dead code against a real controller.
*
* The actual fix (persist.c's apply_committed_entry, WAL_CONFIG_MARKER
* case) calls upgrade_materialization_verify() UNCONDITIONALLY right after
* persist_checkpoint_marker_triggered() returns, regardless of that call's
* own rc -- checkpoint completion (or a self-resolving skip) is the
* design-intended re-evaluation trigger (design.md's Activation Fence
* component). This test reaches the fenced state purely through that real
* seam -- config_append_marker + commit_submit + wait-for-applied, with
* persist_checkpoint_marker_triggered() forced to miss via the exact
* checkpoint_in_progress technique test_upgrade_materialization_verify_
* incomplete_materialization_fences (6.1-c) and test_upgrade_materialization
* _fence_enforced_by_dispatch_gate_and_promotion (6.2-a) use -- and NEVER
* calls upgrade_materialization_verify() itself. */
static void test_wal_config_marker_apply_sets_fence_via_real_checkpoint_miss(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr62_real_trigger_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/45, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
/* Fixture default: unfenced (fresh cluster_t, zero-initialized atomic)
* -- the exact "closed loop, no entry point" starting condition the
* rejection identified. This test body never calls
* upgrade_materialization_verify() anywhere below -- the fence must be
* set purely by the real apply-time trigger. */
TEST_ASSERT_EQUAL_INT(0, upgrade_materialization_fenced(c));
size_t blen = 0;
uint8_t *bytes = t43_make_config_blob(&blen);
uint8_t sha[32];
SHA256(bytes, blen, sha);
uint64_t tag; { uint64_t t; memcpy(&t, sha, 8); tag = be64toh(t); }
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytes, blen, sha));
free(bytes);
/* Force materialization to genuinely miss for THIS marker: hold the
* shared checkpoint_in_progress CAS open across the commit, so
* persist_checkpoint_marker_triggered() (called from
* apply_committed_entry's WAL_CONFIG_MARKER case) hits the real -EBUSY
* path (Req 4.4) -- self-resolving, not a failure, so apply itself
* still succeeds and last_applied_lsn still advances. */
TEST_ASSERT_EQUAL_INT(
0, atomic_exchange_explicit(&c->persist.checkpoint_in_progress, 1,
memory_order_acq_rel));
uint64_t mlsn = 0;
TEST_ASSERT_EQUAL_INT(0, config_append_marker(c, tag, sha, &mlsn));
TEST_ASSERT_EQUAL_INT(0, persist_flush(&c->persist));
TEST_ASSERT_EQUAL_INT(0,
commit_submit(&c->commit, mlsn, COMMIT_MODE_WAIT, 1000));
/* Wait for the REAL apply_committed_entry() dispatch to finish for this
* marker. persist_apply_pump_run advances last_applied_lsn only AFTER
* that dispatch call returns (see apply_committed_entry's own
* WAL_CONFIG_MARKER case doc comment), so by the time
* t42_wait_applied observes last_applied_lsn >= mlsn, the new
* unconditional upgrade_materialization_verify(c) call at the end of
* that case has already run synchronously on this same call stack. */
t42_wait_applied(&c->persist, mlsn, 2000);
TEST_ASSERT_TRUE(persist_last_applied_lsn(&c->persist) >= mlsn);
/* Release the simulated in-flight checkpoint now that the marker's own
* apply (and its -EBUSY'd checkpoint attempt) has already happened. */
atomic_store_explicit(&c->persist.checkpoint_in_progress, 0,
memory_order_release);
/* THE ASSERTION THAT PROVES THE FIX: the fence reads SET, and this test
* body never called upgrade_materialization_verify() itself -- the only
* possible source is persist.c's new unconditional post-checkpoint
* call. Before the fix, this read 0 forever: every production path to
* upgrade_materialization_verify() was gated on the fence already being
* 1, so nothing could ever set it for the first time. */
TEST_ASSERT_EQUAL_INT(1, upgrade_materialization_fenced(c));
/* Confirm this is a genuine incomplete-materialization fence (cfgref_*
* never advanced to this marker, because the checkpoint that would have
* stamped it was skipped) -- not a coincidental pass. */
TEST_ASSERT_FALSE(c->persist.cfgref_present &&
c->persist.cfgref_tag == tag &&
memcmp(c->persist.cfgref_sha, sha, 32) == 0);
/* Close the loop end-to-end: the two production READERS of this fence
* (ha_dispatch_gate and the promotion gate) both observe it too, using
* the same real seams 6.2-a exercises -- reusing existing test
* infrastructure, not re-deriving it. */
TEST_ASSERT_TRUE(ha_dispatch_gate(&c->ha, OPCode_jobsub) < 0);
TEST_ASSERT_EQUAL_INT(0, ha_dispatch_gate(&c->ha, OPCode_heartbeat));
c->ha.phase2_done = 1; /* skip cluster_init_phase2 -- unrelated first-boot path */
atomic_store_explicit(&c->ha.role, (int32_t)CTRL_ELECTING,
memory_order_release);
raft_cb_become_leader_with_cluster_for_test(c, /*term*/45);
TEST_ASSERT_NOT_EQUAL_MESSAGE(
(int32_t)CTRL_PRIMARY,
atomic_load_explicit(&c->ha.role, memory_order_acquire),
"config-upgrade-snapshot task 6.2 remediation: a fence set by the "
"REAL apply-time trigger must refuse promotion, same as a "
"directly-set fence does");
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_wal_config_marker_apply_sets_fence_via_real_checkpoint_miss: PASS\n");
}
/* ── bug-1469 regression: WAL_CONFIG_MARKER apply must ACTIVATE config on
* the ORIGINATING member, not just receiving standbys ──────────────────────
*
* Live 3-node chaotic-kill soak (config-upgrade-snapshot task 8.6,
* .wolf/buglog.json bug-1469): a config upgrade's WAL_CONFIG_MARKER commits
* and even checkpoints successfully on the ORIGINATING member (the primary
* that submitted the upgrade via do_upgrade_config_with_bytes), but
* apply_committed_entry's WAL_CONFIG_MARKER case (persist.c) never called
* config_activate_committed()/load_primary_config() -- so that member's
* c->myconf stayed parsed from the OLD config bytes until some LATER,
* independent event (a restart, or an incoming out-of-band
* handle_repl_config_push) happened to refresh it. The live soak killed the
* originating primary shortly after it committed the upgrade, before any
* such later event, freezing a stale c->myconf into its last checkpoint --
* a genuine cross-member materialized-state divergence (ctrl-1's checkpoint
* ended up a different byte size than ctrl-2/ctrl-3's, both LSN 11).
* config_activate_committed WAS already being called correctly on
* RECEIVING standbys, via handle_repl_config_push -- this gap is specific
* to the member that originates/commits the marker on itself.
*/
/* Build a valid ClusterConfig blob distinguishable by config_generation +
* clustername (mirrors t43_make_config_blob, parameterized so this test can
* commit two genuinely different, independently-decodable configs -- an
* "old" pre-upgrade config and a "new" post-upgrade config -- without
* relying on a byte-mutation of an opaque capnp blob, which risks
* corrupting the encoding; config-upgrade-snapshot's own standing gotcha
* notes t43_make_config_blob() returns byte-IDENTICAL content on repeat
* calls, so a genuinely different SECOND blob needs its own encode call). */
static uint8_t *t1469_make_config_blob(uint64_t gen, const char *name,
size_t *len_out)
{
cluster_config_t cfg;
struct capn cap;
struct capn_segment *cs;
ClusterConfig_ptr p;
uint8_t *buf;
size_t sz;
memset(&cfg, 0, sizeof(cfg));
cfg.clustername = (char *)name;
cfg.config_generation = gen;
capn_init_malloc(&cap);
cs = capn_root(&cap).seg;
encode_ClusterConfig_ptr(cs, &p, &cfg);
capn_setp(capn_root(&cap), 0, p.p);
sz = (size_t)capn_size(&cap);
buf = (uint8_t *)malloc(sz);
TEST_ASSERT_NOT_NULL(buf);
capn_write_mem(&cap, buf, sz, 0);
capn_free(&cap);
*len_out = sz;
return buf;
}
/* This test drives the upgrade marker through the REAL production apply
* path (config_append_marker + commit_submit + wait-for-applied, exactly
* like test_wal_config_marker_apply_sets_fence_via_real_checkpoint_miss
* above) on a single-member fixture acting as its OWN primary -- i.e. the
* ORIGINATING member applying its own committed marker, never receiving an
* out-of-band handle_repl_config_push. It NEVER calls
* config_activate_committed() for the upgrade marker itself, so the only
* way mc->cluster_config can reflect the new config is via
* apply_committed_entry's own WAL_CONFIG_MARKER dispatch.
*
* RED (before the fix): mc->cluster_config stays pinned to the OLD config
* (config_generation==1, "t1469-old") after the new marker's real,
* successful commit+apply -- proving the marker-triggered dispatch never
* activates config on the member that originated it.
* GREEN (after the fix): mc->cluster_config reflects the NEW config
* (config_generation==2, "t1469-new") immediately after the marker's apply
* returns, with no restart and no out-of-band push. */
static void test_wal_config_marker_apply_activates_originating_member_config(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr1469_activate_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/69, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
myconf_t *mc = t43_attach_myconf(c, tmp);
/* Establish the pre-upgrade steady state: an OLD config already
* committed and ACTIVATED via the legitimate, already-tested
* config_activate_committed path (mirrors 4.3-a above) -- this member
* is already running under config_generation=1 before any upgrade is
* ever submitted, exactly like a real cluster member. */
size_t oldlen = 0;
uint8_t *oldbytes = t1469_make_config_blob(1, "t1469-old", &oldlen);
uint8_t oldsha[32];
SHA256(oldbytes, oldlen, oldsha);
uint64_t oldtag; { uint64_t t; memcpy(&t, oldsha, 8); oldtag = be64toh(t); }
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, oldbytes, oldlen, oldsha));
free(oldbytes);
t43_commit_marker(c, oldtag, oldsha);
TEST_ASSERT_EQUAL_INT(0, config_activate_committed(c));
TEST_ASSERT_NOT_NULL(mc->cluster_config);
TEST_ASSERT_EQUAL_UINT64(1, mc->cluster_config->config_generation);
/* Now the upgrade: NEW config bytes saved locally exactly as
* do_upgrade_config_with_bytes's own step 5 (conf_save_config) does on
* the ORIGINATING primary, then a NEW marker committed through the
* exact same real path bug-1469's live soak exercised. Deliberately
* NEVER calls config_activate_committed() for this marker anywhere
* below -- activation must come from apply_committed_entry's own
* dispatch, or this assertion fails. */
size_t newlen = 0;
uint8_t *newbytes = t1469_make_config_blob(2, "t1469-new", &newlen);
uint8_t newsha[32];
SHA256(newbytes, newlen, newsha);
uint64_t newtag; { uint64_t t; memcpy(&t, newsha, 8); newtag = be64toh(t); }
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, newbytes, newlen, newsha));
free(newbytes);
t43_commit_marker(c, newtag, newsha);
/* THE ASSERTION THAT PROVES THE FIX: mc->cluster_config must now
* reflect the NEW config -- purely from apply_committed_entry's own
* WAL_CONFIG_MARKER dispatch, exactly the production path the
* ORIGINATING primary runs on itself. Before the fix this stays pinned
* at generation 1 ("t1469-old") forever -- exactly bug-1469's observed
* cross-member divergence, reproduced at the unit level. */
TEST_ASSERT_NOT_NULL(mc->cluster_config);
TEST_ASSERT_EQUAL_UINT64_MESSAGE(2, mc->cluster_config->config_generation,
"bug-1469: apply_committed_entry's WAL_CONFIG_MARKER case never "
"activated the new config on the ORIGINATING member -- c->myconf "
"stayed pinned to the OLD config");
TEST_ASSERT_EQUAL_STRING("t1469-new", mc->cluster_config->clustername);
TEST_ASSERT_EQUAL_HEX64(newtag, mc->config_version_tag);
TEST_ASSERT_EQUAL_INT(0, config_serve_fenced(c));
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
printf("test_wal_config_marker_apply_activates_originating_member_config: PASS\n");
}
/* ── config-upgrade-snapshot task 8.8: a second configuration-change marker
* committing before the first's snapshot install completes everywhere must
* cleanly SUPERSEDE the first's in-flight materialization -- never leave it
* partially applied or conflated with the newer one (Req 4.4, 7.2) ────────
*
* design.md ("Overlapping-marker -EBUSY handling", ~line 258, and
* "Overlapping upgrades", ~line 413): when marker B's own apply runs while
* marker A's forced checkpoint is still physically in flight (holding the
* shared checkpoint_in_progress CAS), marker B's own checkpoint call ALSO
* hits -EBUSY -- not an error, self-resolving. Content is a deterministic
* function of (term, lsn, config-hash), and config_committed_marker always
* resolves to the LATEST committed marker within the committed prefix
* (scan_latest_committed_marker, config_repl.c:124-215, "later markers
* overwrite -- latest wins", line 198). So once checkpointing is unblocked
* and a fresh checkpoint attempt runs, it always reflects the latest marker
* -- never a stale/partial mix of the two.
*
* Two independently-built single-member fixtures process the IDENTICAL
* entry sequence (same term, same two deterministic config blobs via
* t1469_make_config_blob -- byte-identical across calls per its own doc
* comment, the same determinism-across-fixtures property task 8.7
* Scenario 2 above already relies on):
*
* c_control -- marker A commits+applies+checkpoints normally, THEN marker
* B commits+applies+checkpoints normally. No racing.
*
* c_raced -- the shared checkpoint_in_progress CAS is held BEFORE marker A
* commits and never released until AFTER both markers have committed and
* applied: marker A's own forced checkpoint attempt -EBUSYs and skips
* (still "installing"), then marker B commits+applies while A's install is
* still outstanding, and marker B's own forced checkpoint attempt ALSO
* -EBUSYs and skips. Only after releasing the CAS and running
* persist_checkpoint() once directly (the same resolve step
* test_marker_apply_busy_checkpoint_handled_gracefully in
* test_upgrade_snapshot_apply.c uses) does a checkpoint actually land.
*
* NOTE on why this test does NOT assert whole-file byte-identity between the
* two fixtures' final checkpoints: c_control's marker A checkpoint
* physically WRITES a WAL_CHECKPOINT entry (persist_write_checkpoint_marker)
* before marker B is ever appended, consuming one physical WAL lsn slot that
* c_raced's fixture never consumes at that point (its checkpoint attempt for
* A never gets past the checkpoint_in_progress CAS check, so nothing is
* physically written for it). Marker B therefore lands at a DIFFERENT
* absolute physical lsn in each fixture (one higher in c_control) purely as
* a side effect of how many checkpoints happened to physically land before
* it -- exactly the "content is a deterministic function of (term, lsn,
* config-hash)" property this task's own description calls out (the
* checkpoint's own lsn is legitimately part of "content"). write_snapshot's
* sentinel header embeds this lsn verbatim at a fixed byte offset
* (persist.c: "magic (8) + checkpoint_lsn (8) + ..."), so the two files are
* expected to diverge at EXACTLY that one field. The decisive proof is
* instead: byte-identical content everywhere else -- the committed-config
* reference (cfgref_tag/cfgref_sha) and the entire entity+config-bytes
* payload -- which is precisely what would carry any trace of marker A's
* incomplete install, if one existed. snapdiff_paths is still used (for the
* diagnostic corroboration that the divergence, if any, is exactly and only
* that one field), alongside a direct field-aware comparison of everything
* from byte 16 onward. */
static void test_second_config_marker_supersedes_first_still_installing_on_member(void)
{
char tmp_control[256], tmp_raced[256];
strcpy(tmp_control, "/tmp/xce_cr88_control_XXXXXX");
strcpy(tmp_raced, "/tmp/xce_cr88_raced_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp_control));
TEST_ASSERT_NOT_NULL(mkdtemp(tmp_raced));
const uint64_t term = 88;
cluster_t *c_control = t42_make_cluster(tmp_control);
cluster_t *c_raced = t42_make_cluster(tmp_raced);
TEST_ASSERT_NOT_NULL(c_control);
TEST_ASSERT_NOT_NULL(c_raced);
t42_make_leader(c_control, term, /*n_peers*/1);
t42_make_leader(c_raced, term, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c_control->commit, &c_control->persist, 1, 8));
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c_raced->commit, &c_raced->persist, 1, 8));
repl_set_commit_engine(&c_control->persist.repl, &c_control->commit);
repl_set_commit_engine(&c_raced->persist.repl, &c_raced->commit);
myconf_t *mc_control = t43_attach_myconf(c_control, tmp_control);
myconf_t *mc_raced = t43_attach_myconf(c_raced, tmp_raced);
/* Identical deterministic blobs across BOTH fixtures -- independent
* encode calls per fixture (t1469_make_config_blob's own doc comment:
* byte-identical for the same (gen, name) parameters). */
size_t oldlen = 0, newlen = 0;
uint8_t *old_control = t1469_make_config_blob(1, "t1469-old", &oldlen);
uint8_t *new_control = t1469_make_config_blob(2, "t1469-new", &newlen);
uint8_t *old_raced = t1469_make_config_blob(1, "t1469-old", &oldlen);
uint8_t *new_raced = t1469_make_config_blob(2, "t1469-new", &newlen);
uint8_t oldsha[32], newsha[32];
SHA256(old_control, oldlen, oldsha);
SHA256(new_control, newlen, newsha);
uint64_t oldtag; { uint64_t t; memcpy(&t, oldsha, 8); oldtag = be64toh(t); }
uint64_t newtag; { uint64_t t; memcpy(&t, newsha, 8); newtag = be64toh(t); }
/* ── Fixture 1: control -- no racing; both markers checkpoint normally. */
TEST_ASSERT_EQUAL_INT(0,
conf_save_config(mc_control, old_control, oldlen, oldsha));
free(old_control);
t43_commit_marker(c_control, oldtag, oldsha);
TEST_ASSERT_EQUAL_INT(0,
conf_save_config(mc_control, new_control, newlen, newsha));
free(new_control);
t43_commit_marker(c_control, newtag, newsha);
uint64_t control_ckpt_lsn = c_control->persist.checkpoint_lsn;
bool control_config_present = (mc_control->cluster_config != NULL);
uint64_t gen_control =
control_config_present ? mc_control->cluster_config->config_generation : 0;
int fenced_control = upgrade_materialization_fenced(c_control);
/* ── Fixture 2: raced -- marker A's install is still genuinely
* outstanding (its checkpoint attempt never lands) when marker B
* commits. Hold the shared checkpoint_in_progress CAS BEFORE marker A
* commits and never release it until AFTER marker B has also committed
* and applied -- this is what makes marker A genuinely "still
* installing" at the moment marker B supersedes it, not a race that
* might or might not manifest. */
TEST_ASSERT_EQUAL_INT(0,
conf_save_config(mc_raced, old_raced, oldlen, oldsha));
free(old_raced);
TEST_ASSERT_EQUAL_INT(
0, atomic_exchange_explicit(&c_raced->persist.checkpoint_in_progress,
1, memory_order_acq_rel));
/* Marker A: inline t43_commit_marker's 4-step body -- its signature must
* stay unmodified for other callers, and the CAS needs to stay held
* across BOTH markers, which a single call to t43_commit_marker cannot
* do. */
uint64_t lsn_a = 0;
TEST_ASSERT_EQUAL_INT(0,
config_append_marker(c_raced, oldtag, oldsha, &lsn_a));
TEST_ASSERT_EQUAL_INT(0, persist_flush(&c_raced->persist));
TEST_ASSERT_EQUAL_INT(0,
commit_submit(&c_raced->commit, lsn_a, COMMIT_MODE_WAIT, 1000));
t42_wait_applied(&c_raced->persist, lsn_a, 2000);
TEST_ASSERT_TRUE(persist_last_applied_lsn(&c_raced->persist) >= lsn_a);
/* Marker B: committed and applied while the CAS is STILL held -- marker
* A's install has not happened yet. */
TEST_ASSERT_EQUAL_INT(0,
conf_save_config(mc_raced, new_raced, newlen, newsha));
free(new_raced);
uint64_t lsn_b = 0;
TEST_ASSERT_EQUAL_INT(0,
config_append_marker(c_raced, newtag, newsha, &lsn_b));
TEST_ASSERT_EQUAL_INT(0, persist_flush(&c_raced->persist));
TEST_ASSERT_EQUAL_INT(0,
commit_submit(&c_raced->commit, lsn_b, COMMIT_MODE_WAIT, 1000));
t42_wait_applied(&c_raced->persist, lsn_b, 2000);
TEST_ASSERT_TRUE(persist_last_applied_lsn(&c_raced->persist) >= lsn_b);
/* ── Mid-scenario: genuinely "still installing" -- captured BEFORE
* releasing the CAS. */
bool config_present_mid = (mc_raced->cluster_config != NULL);
uint64_t gen_mid =
config_present_mid ? mc_raced->cluster_config->config_generation : 0;
char *clustername_mid =
(config_present_mid && mc_raced->cluster_config->clustername)
? strdup(mc_raced->cluster_config->clustername) : NULL;
bool cfgref_present_mid = c_raced->persist.cfgref_present;
int fenced_mid = upgrade_materialization_fenced(c_raced);
/* Release the CAS -- whatever else was (simulated to be) holding it has
* finished; marker A's and marker B's own checkpoint attempts are both
* long past (both -EBUSY'd and skipped). */
atomic_store_explicit(&c_raced->persist.checkpoint_in_progress, 0,
memory_order_release);
/* Resolve: a fresh checkpoint attempt, self-resolving per design.md --
* mirrors test_marker_apply_busy_checkpoint_handled_gracefully's own
* resolve step (test_upgrade_snapshot_apply.c). A bare persist_checkpoint()
* call is NOT itself a marker-apply dispatch, so it does not call
* upgrade_materialization_verify() on its own -- that call only happens
* from apply_committed_entry's WAL_CONFIG_MARKER case (a NEW marker
* applying) or from the delaymgr-driven retry trampoline
* (schedule_upgrade_materialization_retry), and this bare fixture never
* initializes a delaymgr. schedule_upgrade_materialization_retry's own
* doc comment is explicit about this exact situation: "No-op when...
* the delaymgr is not running (the unit-test fixture path...) -- caller
* drives directly". Explicitly re-verify here, mirroring the 6.1-c fence
* tests above (e.g. immediately after t43_commit_marker) which do the
* same for the same reason. */
int resolve_rc = persist_checkpoint(&c_raced->persist);
uint64_t raced_ckpt_lsn = c_raced->persist.checkpoint_lsn;
int verify_rc = upgrade_materialization_verify(c_raced);
/* ── Post-resolve: the "settled" state. */
uint64_t committed_tag_after = 0;
uint8_t committed_sha_after[32];
int rc_committed_after = config_committed_marker(
c_raced, &committed_tag_after, committed_sha_after);
bool cfgref_matches_after = c_raced->persist.cfgref_present &&
c_raced->persist.cfgref_tag == newtag &&
memcmp(c_raced->persist.cfgref_sha, newsha, 32) == 0;
int fenced_after = upgrade_materialization_fenced(c_raced);
bool config_present_after = (mc_raced->cluster_config != NULL);
uint64_t gen_after =
config_present_after ? mc_raced->cluster_config->config_generation : 0;
char *clustername_after =
(config_present_after && mc_raced->cluster_config->clustername)
? strdup(mc_raced->cluster_config->clustername) : NULL;
/* ── Cross-fixture proof: settle both checkpoint file paths. */
char control_snap_path[4096], raced_snap_path[4096];
snprintf(control_snap_path, sizeof(control_snap_path),
"%s/snap-%016" PRIx64 ".capnp", c_control->persist.snap_path,
control_ckpt_lsn);
snprintf(raced_snap_path, sizeof(raced_snap_path),
"%s/snap-%016" PRIx64 ".capnp", c_raced->persist.snap_path,
raced_ckpt_lsn);
bool control_snap_exists = (access(control_snap_path, F_OK) == 0);
bool raced_snap_exists = (access(raced_snap_path, F_OK) == 0);
snapdiff_report_t diff_rep;
memset(&diff_rep, 0, sizeof(diff_rep));
int diff_rc = snapdiff_paths(control_snap_path, raced_snap_path, NULL,
&diff_rep);
/* Independent, field-aware comparison: read both files fully and compare
* everything AFTER the 16-byte [magic(8) + checkpoint_lsn(8)] prefix --
* i.e. cfgref_present/tag/sha, format_version, and the entire
* entity+config-bytes payload (write_snapshot's sentinel layout,
* persist.c). This excludes the ONE field expected to legitimately
* differ (the checkpoint's own physical WAL lsn) and asserts everything
* else -- which is what would carry any trace of marker A's incomplete
* install -- is byte-for-byte identical. */
long control_size = -1, raced_size = -1;
uint8_t *control_buf = NULL, *raced_buf = NULL;
FILE *fp_control = fopen(control_snap_path, "rb");
if (fp_control) {
fseek(fp_control, 0, SEEK_END);
control_size = ftell(fp_control);
fseek(fp_control, 0, SEEK_SET);
if (control_size > 0) {
control_buf = (uint8_t *)malloc((size_t)control_size);
if (control_buf)
TEST_ASSERT_EQUAL_INT((int)control_size,
(int)fread(control_buf, 1, (size_t)control_size, fp_control));
}
fclose(fp_control);
}
FILE *fp_raced = fopen(raced_snap_path, "rb");
if (fp_raced) {
fseek(fp_raced, 0, SEEK_END);
raced_size = ftell(fp_raced);
fseek(fp_raced, 0, SEEK_SET);
if (raced_size > 0) {
raced_buf = (uint8_t *)malloc((size_t)raced_size);
if (raced_buf)
TEST_ASSERT_EQUAL_INT((int)raced_size,
(int)fread(raced_buf, 1, (size_t)raced_size, fp_raced));
}
fclose(fp_raced);
}
bool sizes_match = (control_size >= 0 && control_size == raced_size);
bool payload_beyond_lsn_matches = false;
if (sizes_match && control_buf && raced_buf && control_size > 16) {
payload_beyond_lsn_matches =
(memcmp(control_buf + 16, raced_buf + 16,
(size_t)(control_size - 16)) == 0);
}
uint64_t control_lsn_in_file = 0, raced_lsn_in_file = 0;
if (control_buf && control_size >= 16)
memcpy(&control_lsn_in_file, control_buf + 8, 8);
if (raced_buf && raced_size >= 16)
memcpy(&raced_lsn_in_file, raced_buf + 8, 8);
free(control_buf);
free(raced_buf);
t43_free_myconf(c_control);
t43_free_myconf(c_raced);
commit_engine_fini(&c_control->commit);
commit_engine_fini(&c_raced->commit);
t42_teardown(c_control);
t42_teardown(c_raced);
/* ── Assertions ──────────────────────────────────────────────────── */
/* Control baseline sanity. */
TEST_ASSERT_TRUE(control_config_present);
TEST_ASSERT_EQUAL_UINT64(2, gen_control);
TEST_ASSERT_EQUAL_INT(0, fenced_control);
/* Mid-scenario: genuinely "still installing". */
TEST_ASSERT_TRUE_MESSAGE(config_present_mid,
"member B's own apply must have activated config independently of "
"marker A's install state");
TEST_ASSERT_EQUAL_UINT64_MESSAGE(2, gen_mid,
"activation must reflect the LATEST marker (B) purely from B's own "
"apply, never re-activating to A afterward nor staying short of B");
TEST_ASSERT_NOT_NULL(clustername_mid);
if (clustername_mid)
TEST_ASSERT_EQUAL_STRING("t1469-new", clustername_mid);
TEST_ASSERT_FALSE_MESSAGE(cfgref_present_mid,
"no checkpoint has physically landed for EITHER marker yet -- both "
"A's and B's checkpoint attempts were skipped via -EBUSY, proving "
"this is genuinely 'still installing', not a coincidental pass");
TEST_ASSERT_EQUAL_INT_MESSAGE(1, fenced_mid,
"materialization for the latest committed marker (B) has not "
"completed yet -- the fence must still be set");
/* Post-resolve: settled state reflects ONLY marker B. */
TEST_ASSERT_EQUAL_INT(0, rc_committed_after);
TEST_ASSERT_EQUAL_HEX64(newtag, committed_tag_after);
TEST_ASSERT_EQUAL_INT(0, memcmp(newsha, committed_sha_after, 32));
TEST_ASSERT_EQUAL_INT_MESSAGE(0, resolve_rc,
"the resolving checkpoint attempt must succeed once the CAS guard "
"is free -- self-resolving, per design.md");
TEST_ASSERT_EQUAL_INT_MESSAGE(0, verify_rc,
"the explicit re-verify (standing in for this bare fixture's absent "
"delaymgr-driven retry trampoline) must succeed once a checkpoint "
"has actually captured marker B");
TEST_ASSERT_TRUE_MESSAGE(cfgref_matches_after,
"the checkpoint sentinel must now reflect marker B, never marker A");
TEST_ASSERT_EQUAL_INT_MESSAGE(0, fenced_after,
"the fence must clear once materialization for the latest marker "
"(B) completes");
TEST_ASSERT_TRUE(config_present_after);
TEST_ASSERT_EQUAL_UINT64(2, gen_after);
TEST_ASSERT_NOT_NULL(clustername_after);
if (clustername_after)
TEST_ASSERT_EQUAL_STRING("t1469-new", clustername_after);
/* Cross-fixture proof -- the decisive assertion for Req 4.4/7.2. */
TEST_ASSERT_TRUE_MESSAGE(control_snap_exists,
"control fixture must have produced a checkpoint at marker B's lsn");
TEST_ASSERT_TRUE_MESSAGE(raced_snap_exists,
"raced fixture must have produced a checkpoint once resolved");
TEST_ASSERT_TRUE_MESSAGE(sizes_match,
"both fixtures' settled checkpoints must be the same total size -- "
"identical entity/config content, differing at most in the "
"embedded physical WAL lsn");
TEST_ASSERT_TRUE_MESSAGE(payload_beyond_lsn_matches,
"Req 4.4/7.2: beyond the one field that legitimately differs "
"(the checkpoint's own physical WAL lsn -- itself content per this "
"task's own 'deterministic function of (term, lsn, config-hash)' "
"framing), the settled checkpoint produced after racing marker A's "
"incomplete install must be byte-for-byte identical to the "
"non-raced control -- no trace of marker A's partially-applied "
"intermediate state survives into marker B's final materialized "
"output");
/* Diagnostic corroboration: snapdiff_paths independently confirms
* whether the files are literally byte-identical end-to-end, and if
* not, that the sole divergence is exactly that one embedded-lsn field
* (offset 8, per write_snapshot's sentinel layout). */
TEST_ASSERT_TRUE_MESSAGE(diff_rc >= 0,
"snapdiff_paths must not error opening either checkpoint file");
TEST_ASSERT_EQUAL_INT_MESSAGE(0, diff_rep.size_mismatch,
"file sizes must match even if the embedded physical lsn differs");
if (!diff_rep.identical) {
TEST_ASSERT_EQUAL_INT_MESSAGE(8, (int)diff_rep.diff_offset,
"the only expected divergence is the embedded checkpoint_lsn "
"field at byte offset 8 (write_snapshot's sentinel layout)");
}
TEST_ASSERT_EQUAL_UINT64(control_ckpt_lsn, control_lsn_in_file);
TEST_ASSERT_EQUAL_UINT64(raced_ckpt_lsn, raced_lsn_in_file);
free(clustername_mid);
free(clustername_after);
printf("test_second_config_marker_supersedes_first_still_installing_on_"
"member: PASS\n");
}
/* ── config-upgrade-snapshot task 8.7 Scenario 2: leadership change mid-
* materialization does not special-case, and completes via the SAME generic
* apply-drain path (Req 5.4) ────────────────────────────────────────────
*
* design.md's own "Key simplification found during design" (persist.c's
* WAL_CONFIG_MARKER case doc comment, apply_committed_entry): "no new
* leader-specific 'resume' logic is needed either, since a newly-elected
* leader satisfies this the same way, by continuing to apply its own
* committed log." This test proves that claim structurally rather than
* asserting it by fiat.
*
* The concrete mechanism (read directly out of raft_cb_become_leader,
* ha.c:1516-1979): the promotion-time eligibility gate
* (upgrade_materialization_fenced(c), ha.c:1763) only refuses promotion when
* the fence has ALREADY been set by a prior upgrade_materialization_verify()
* call. A marker that is committed but has never yet been through
* apply_committed_entry() at all -- a genuine apply backlog, not a checkpoint
* failure -- leaves the fence at its zero-initialized (unfenced) default,
* because nothing has evaluated it yet. So promotion is NOT refused in this
* case. What actually drains the backlog is ha.c:1878's
* persist_apply_pump_run_sync(&c->persist) call, unconditionally issued right
* after role flips to CTRL_PRIMARY -- the SAME synchronous drain function
* bug-1043's job-backlog fix added for an entirely unrelated reason (a
* promoted standby's un-applied committed jobs must be visible immediately).
* The WAL_CONFIG_MARKER case (persist.c) rides that pre-existing, generic
* drain for free: no leadership-specific config-upgrade code exists anywhere
* in the promotion path.
*
* This test drives that exact mechanism directly
* (persist_apply_pump_run_sync) rather than the full
* raft_cb_become_leader_with_cluster_for_test() tail, deliberately: the rest
* of that function's post-drain tail (quorum-transition logging, config push,
* ctrlhello, persist-hook registration, heartbeat start, own-term gate arm)
* is orthogonal to Requirement 5.4's materialization-continuation claim and
* would require a substantially larger, novel fixture (full ha_init +
* delaymgr_init, mirroring test_convergence_verification.c's cv_setup --
* this file's own t42_/t43_ fixtures deliberately do NOT wire that, since no
* other test in this file drives promotion past the fence-refusal point) to
* exercise safely -- a scope expansion this test-only task should not take
* on. The GATING half of Req 5.4 (a member whose fence IS already set
* refuses promotion) is already exhaustively covered by
* test_upgrade_materialization_fence_enforced_by_dispatch_gate_and_promotion
* (6.2-a) and
* test_wal_config_marker_apply_sets_fence_via_real_checkpoint_miss (6.2
* remediation) above, both via the real raft_cb_become_leader_with_cluster_
* for_test() gate -- this test does not repeat that proof, it closes the
* CONTINUATION half neither of those tests reach (both stop at the refusal;
* neither goes on to clear the condition and confirm materialization
* completes normally afterward).
*
* Rigor: builds TWO independent members (A: promoted mid-backlog: role set
* CTRL_PRIMARY the same way every other test in this file simulates
* promotion (t42_make_leader), THEN drained via persist_apply_pump_run_sync
* -- the same function production promotion invokes; B: never promoted,
* drained via the ordinary persist_apply_pump_run()) starting from the
* IDENTICAL committed marker + config bytes, and asserts their resulting
* checkpoints are BYTE-IDENTICAL (snapdiff_paths) -- not merely that both
* "also complete," but that they complete IDENTICALLY, mirroring bug-857's
* own two-member convergence-proof style (test_bug857_regression.c).
*/
static void test_leadership_change_mid_materialization_completes_via_same_generic_apply_drain(void)
{
char tmp_a[256], tmp_b[256];
strcpy(tmp_a, "/tmp/xce_cr87s2_a_XXXXXX");
strcpy(tmp_b, "/tmp/xce_cr87s2_b_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp_a));
TEST_ASSERT_NOT_NULL(mkdtemp(tmp_b));
cluster_t *c_a = t42_make_cluster(tmp_a);
cluster_t *c_b = t42_make_cluster(tmp_b);
TEST_ASSERT_NOT_NULL(c_a);
TEST_ASSERT_NOT_NULL(c_b);
myconf_t *mc_a = t43_attach_myconf(c_a, tmp_a);
myconf_t *mc_b = t43_attach_myconf(c_b, tmp_b);
/* Identical config bytes on both members (t43_make_config_blob is
* documented byte-identical across calls -- exactly what this test
* wants, since A and B must start from the SAME upgrade content for a
* byte-identical-outcome comparison to be meaningful). */
size_t blen = 0;
uint8_t *bytes = t43_make_config_blob(&blen);
uint8_t sha[32];
SHA256(bytes, blen, sha);
uint64_t tag; { uint64_t tmp; memcpy(&tmp, sha, 8); tag = be64toh(tmp); }
int rc_save_a = conf_save_config(mc_a, bytes, blen, sha);
int rc_save_b = conf_save_config(mc_b, bytes, blen, sha);
free(bytes);
uint8_t marker_payload[WAL_CONFIG_MARKER_PAYLOAD_LEN];
size_t out_len = 0;
int rc_encode = config_marker_encode(tag, sha, marker_payload,
WAL_CONFIG_MARKER_PAYLOAD_LEN,
&out_len);
/* Append the SAME marker directly to each member's physical WAL
* (persist_wal_async, bypassing config_append_marker/commit_submit's
* commit-engine/fsync-worker machinery entirely) and advance
* committed_lsn directly -- mirrors test_bug857_regression.c's own
* Scenario 2 technique exactly, chosen for the identical reason: it is
* the only DETERMINISTIC way to leave a marker genuinely committed but
* NOT YET applied (a real apply backlog) without racing this fixture's
* background fsync_worker thread, which a commit_submit(WAIT) round
* trip cannot guarantee (see t42_wait_applied's own doc comment on this
* exact race). */
int rc_wal_a = persist_wal_async(&c_a->persist, WAL_CONFIG_MARKER,
marker_payload,
WAL_CONFIG_MARKER_PAYLOAD_LEN);
uint64_t marker_lsn_a = c_a->persist.current_lsn - 1;
uint64_t committed_a = persist_committed_lsn_advance_atomic(
&c_a->persist, marker_lsn_a);
int rc_wal_b = persist_wal_async(&c_b->persist, WAL_CONFIG_MARKER,
marker_payload,
WAL_CONFIG_MARKER_PAYLOAD_LEN);
uint64_t marker_lsn_b = c_b->persist.current_lsn - 1;
uint64_t committed_b = persist_committed_lsn_advance_atomic(
&c_b->persist, marker_lsn_b);
/* Precondition (validates this is genuinely the "backlog, never yet
* evaluated" case, not the "already fenced" case 6.2-a covers): neither
* member has applied anything yet, and neither fence has ever been
* evaluated for this marker, so both read unfenced by construction. */
uint64_t last_applied_before_a = persist_last_applied_lsn(&c_a->persist);
uint64_t last_applied_before_b = persist_last_applied_lsn(&c_b->persist);
int fenced_before_a = upgrade_materialization_fenced(c_a);
int fenced_before_b = upgrade_materialization_fenced(c_b);
/* A: "leadership change" -- promoted via this fixture family's own
* established promotion-simulation call (t42_make_leader; every test in
* this file uses it for this purpose except the ones specifically
* proving the real election-time GATE itself, which this test does not
* re-prove -- see header comment). Confirm becoming primary alone has NO
* bearing on the fence (still reads unfenced immediately after the role
* flip -- nothing leader-specific touches it), THEN drive the exact
* function production promotion uses to drain a backlog
* (persist_apply_pump_run_sync, ha.c:1878). */
t42_make_leader(c_a, /*term*/60, /*n_peers*/1);
int32_t role_after_promotion =
atomic_load_explicit(&c_a->ha.role, memory_order_acquire);
int fenced_immediately_after_promotion = upgrade_materialization_fenced(c_a);
persist_apply_pump_run_sync(&c_a->persist);
/* B: no leadership change at all -- drained via the ordinary,
* always-available apply-pump entry point every non-promoted member
* (standby or an already-serving primary catching up its own backlog)
* uses identically. */
int applied_b = persist_apply_pump_run(&c_b->persist);
uint64_t last_applied_after_a = persist_last_applied_lsn(&c_a->persist);
uint64_t last_applied_after_b = persist_last_applied_lsn(&c_b->persist);
int fenced_after_a = upgrade_materialization_fenced(c_a);
int fenced_after_b = upgrade_materialization_fenced(c_b);
uint64_t gen_a = mc_a->cluster_config ? mc_a->cluster_config->config_generation : 0;
uint64_t gen_b = mc_b->cluster_config ? mc_b->cluster_config->config_generation : 0;
bool cluster_config_a_present = (mc_a->cluster_config != NULL);
bool cluster_config_b_present = (mc_b->cluster_config != NULL);
char snap_a[4096], snap_b[4096];
snprintf(snap_a, sizeof(snap_a), "%s/snap-%016" PRIx64 ".capnp",
c_a->persist.snap_path, marker_lsn_a);
snprintf(snap_b, sizeof(snap_b), "%s/snap-%016" PRIx64 ".capnp",
c_b->persist.snap_path, marker_lsn_b);
bool snap_a_exists = (access(snap_a, F_OK) == 0);
bool snap_b_exists = (access(snap_b, F_OK) == 0);
snapdiff_report_t diff_rep;
memset(&diff_rep, 0, sizeof(diff_rep));
int diff_rc = snapdiff_paths(snap_a, snap_b, NULL, &diff_rep);
t43_free_myconf(c_a);
t43_free_myconf(c_b);
t42_teardown(c_a);
t42_teardown(c_b);
/* ── Assertions ──────────────────────────────────────────────────── */
TEST_ASSERT_EQUAL_INT(0, rc_save_a);
TEST_ASSERT_EQUAL_INT(0, rc_save_b);
TEST_ASSERT_EQUAL_INT(0, rc_encode);
TEST_ASSERT_EQUAL_INT(0, rc_wal_a);
TEST_ASSERT_EQUAL_INT(0, rc_wal_b);
TEST_ASSERT_EQUAL_UINT64(marker_lsn_a, committed_a);
TEST_ASSERT_EQUAL_UINT64(marker_lsn_b, committed_b);
TEST_ASSERT_EQUAL_UINT64_MESSAGE(marker_lsn_a, marker_lsn_b,
"both members must start from the SAME marker lsn for a "
"byte-identical-outcome comparison to be meaningful");
TEST_ASSERT_EQUAL_UINT64_MESSAGE(0, last_applied_before_a,
"precondition: member A must not have applied anything yet");
TEST_ASSERT_EQUAL_UINT64_MESSAGE(0, last_applied_before_b,
"precondition: member B must not have applied anything yet");
TEST_ASSERT_EQUAL_INT_MESSAGE(0, fenced_before_a,
"precondition: an unevaluated backlog must NOT already be fenced -- "
"this is genuinely the case existing 6.2 tests don't cover, "
"distinct from a fence already set by a prior checkpoint miss");
TEST_ASSERT_EQUAL_INT(0, fenced_before_b);
TEST_ASSERT_EQUAL_INT_MESSAGE((int32_t)CTRL_PRIMARY, role_after_promotion,
"the promotion simulation must actually take effect");
TEST_ASSERT_EQUAL_INT_MESSAGE(0, fenced_immediately_after_promotion,
"becoming primary must have NO bearing on the fence by itself -- no "
"leader-specific code sets or clears it as a side effect of the "
"role transition");
TEST_ASSERT_TRUE_MESSAGE(last_applied_after_a >= marker_lsn_a,
"Req 5.4: the SAME generic sync-drain function production "
"promotion invokes (persist_apply_pump_run_sync) must complete "
"materialization for the backlogged marker -- no special resume "
"logic needed, none exists");
TEST_ASSERT_EQUAL_INT_MESSAGE(1, applied_b,
"control: the non-promoted member's ordinary apply pump must "
"apply exactly the one backlogged marker entry");
TEST_ASSERT_TRUE_MESSAGE(last_applied_after_b >= marker_lsn_b,
"control: the non-promoted member's ordinary apply pump must "
"complete materialization identically");
TEST_ASSERT_EQUAL_INT_MESSAGE(0, fenced_after_a,
"member A's materialization must be genuinely verified complete "
"(fence clears), not merely attempted");
TEST_ASSERT_EQUAL_INT(0, fenced_after_b);
TEST_ASSERT_TRUE_MESSAGE(cluster_config_a_present,
"member A's config must have activated as part of the same "
"marker-apply dispatch, exactly as it does for any non-promoted "
"member (bug-1469)");
TEST_ASSERT_TRUE(cluster_config_b_present);
TEST_ASSERT_EQUAL_UINT64(1, gen_a); /* t43_make_config_blob's hardcoded generation */
TEST_ASSERT_EQUAL_UINT64(gen_b, gen_a);
TEST_ASSERT_TRUE_MESSAGE(snap_a_exists,
"member A must have produced a checkpoint at the marker's own lsn");
TEST_ASSERT_TRUE_MESSAGE(snap_b_exists,
"member B must have produced a checkpoint at the marker's own lsn");
/* THE decisive proof: materialization triggered by a leadership change
* mid-backlog produces EXACTLY the same artifact as an ordinary,
* never-promoted member's continued apply of the identical marker --
* "completes identically to the non-promoted case," not merely "also
* completes." */
TEST_ASSERT_EQUAL_INT_MESSAGE(0, diff_rc,
"Req 5.4: a leadership-change-driven materialization drain must "
"produce a checkpoint byte-identical to the non-promoted member's");
TEST_ASSERT_TRUE_MESSAGE(diff_rep.identical,
"no leader-specific divergence exists in the materialized output");
printf("test_leadership_change_mid_materialization_completes_via_"
"same_generic_apply_drain: PASS\n");
}
/* ── wait_all_with_timeout (XCE_TESTING shim) ───── */
#ifdef XCE_TESTING
/* Thread args for timeout tests */
typedef struct {
atomic_int *stop; /* poll this; exit when set to allow pthread_join to return */
push_ctx_t *ctx;
} timeout_test_arg_t;
/* Polls stop flag at 5ms intervals; exits when stop is set WITHOUT setting acked.
* This simulates a synchronous push that respects the done signal. */
static void *slow_push_thread(void *arg)
{
timeout_test_arg_t *a = (timeout_test_arg_t *)arg;
while (!atomic_load(a->stop))
usleep(5000);
/* Thread exits without setting acked — deadline fired before completion */
a->ctx->done = 1;
return NULL;
}
static void *fast_push_thread(void *arg)
{
push_ctx_t *ctx = (push_ctx_t *)arg;
ctx->acked = 1;
ctx->done = 1;
return NULL;
}
static void test_wait_all_with_timeout_slow_threads(void)
{
/* 2 threads that poll the done flag and exit without acking.
* Timeout is 100ms. Expect: acked==0, done==1, returns within ~200ms. */
const int N = 2;
pthread_t threads[2];
push_ctx_t ctxs[2];
timeout_test_arg_t args[2];
atomic_int done;
memset(ctxs, 0, sizeof(ctxs));
atomic_init(&done, 0);
for (int i = 0; i < N; i++) {
ctxs[i].started = 1;
args[i].stop = &done;
args[i].ctx = &ctxs[i];
pthread_create(&threads[i], NULL, slow_push_thread, &args[i]);
}
struct timespec t0, t1;
clock_gettime(CLOCK_MONOTONIC, &t0);
int acked = wait_all_with_timeout_for_test(threads, ctxs, N, 100, &done);
clock_gettime(CLOCK_MONOTONIC, &t1);
long elapsed_ms = (t1.tv_sec - t0.tv_sec) * 1000
+ (t1.tv_nsec - t0.tv_nsec) / 1000000;
/* Threads did not ack within the 100ms timeout */
TEST_ASSERT_EQUAL_INT(0, acked);
/* done flag must be set by wait_all_with_timeout */
TEST_ASSERT_EQUAL_INT(1, atomic_load(&done));
/* Total elapsed should be close to the 100ms timeout + small join overhead */
TEST_ASSERT_LESS_THAN(400, (int)elapsed_ms);
printf("test_wait_all_with_timeout_slow_threads: PASS (elapsed=%ldms acked=%d)\n",
elapsed_ms, acked);
}
static void test_wait_all_with_timeout_fast_threads(void)
{
/* 3 threads that complete immediately; timeout is 200ms.
* Expect: all 3 acked, returns quickly (well under 200ms). */
const int N = 3;
pthread_t threads[3];
push_ctx_t ctxs[3];
atomic_int done;
memset(ctxs, 0, sizeof(ctxs));
atomic_init(&done, 0);
for (int i = 0; i < N; i++) {
ctxs[i].started = 1;
pthread_create(&threads[i], NULL, fast_push_thread, &ctxs[i]);
}
struct timespec t0, t1;
clock_gettime(CLOCK_MONOTONIC, &t0);
int acked = wait_all_with_timeout_for_test(threads, ctxs, N, 200, &done);
clock_gettime(CLOCK_MONOTONIC, &t1);
long elapsed_ms = (t1.tv_sec - t0.tv_sec) * 1000
+ (t1.tv_nsec - t0.tv_nsec) / 1000000;
TEST_ASSERT_EQUAL_INT(N, acked);
TEST_ASSERT_EQUAL_INT(1, atomic_load(&done));
/* Should have returned long before the 200ms timeout */
TEST_ASSERT_LESS_THAN(200, (int)elapsed_ms);
printf("test_wait_all_with_timeout_fast_threads: PASS (elapsed=%ldms acked=%d)\n",
elapsed_ms, acked);
}
/* ── push_config_transport_only endpoint lifetime (bug-1381) ───── */
/* push_thread_send_hook: test-only seam declared in config_repl.c (same
* pattern as xce_wal_stream_request_hook) letting this test intercept and
* park push_thread's send so it can probe endpoint_ref/unref bracketing
* around a concurrent teardown, without a real transport connection. */
extern int (*push_thread_send_hook)(endpoint_t *ep, xce_peerinfo_t *from,
uint64_t new_tag, const uint8_t *sha256,
const uint8_t *bytes, size_t blen);
static atomic_int g_cpto_parked;
static atomic_int g_cpto_release;
static int cpto_parking_send_hook(endpoint_t *ep, xce_peerinfo_t *from,
uint64_t new_tag, const uint8_t *sha256,
const uint8_t *bytes, size_t blen)
{
(void)ep; (void)from; (void)new_tag; (void)sha256; (void)bytes; (void)blen;
atomic_store_explicit(&g_cpto_parked, 1, memory_order_release);
while (!atomic_load_explicit(&g_cpto_release, memory_order_acquire))
usleep(1000);
return 0;
}
static int cpto_wait_flag(atomic_int *flag, int target, int timeout_ms)
{
int waited = 0;
while (atomic_load_explicit(flag, memory_order_acquire) != target) {
if (waited >= timeout_ms)
return -1;
usleep(2000);
waited += 2;
}
return 0;
}
typedef struct {
cluster_t *c;
int acked;
int n;
} cpto_driver_arg_t;
static void *cpto_driver_fn(void *arg)
{
cpto_driver_arg_t *a = (cpto_driver_arg_t *)arg;
uint8_t sha[32];
uint8_t body[4] = { 1, 2, 3, 4 };
memset(sha, 0, sizeof(sha));
a->acked = push_config_transport_only(a->c, body, sizeof(body), sha, 99,
&a->n);
return NULL;
}
/*
* bug-1381: push_config_transport_only spawns a push_thread per registered
* standby that reads ctx->ep for the full duration of the transport send.
* Before the fix, no ref was taken on ep, so a concurrent RDHUP teardown
* (endpoint_killer -> endpoint_unref, the bug-1298 refcount system) could
* free ep out from under the still-running push_thread -- a UAF. This test
* parks a push_thread mid-send via push_thread_send_hook, simulates the
* owner's teardown, and verifies ep survives until the send completes.
*/
static void test_configpush_transport_holds_endpoint_ref_across_send(void)
{
cluster_t c;
memset(&c, 0, sizeof(c));
xce_peerinfo_t myhost_info;
memset(&myhost_info, 0, sizeof(myhost_info));
c.myhost = &myhost_info;
ha_config_t cfg;
memset(&cfg, 0, sizeof(cfg));
cfg.heartbeat_timeout_ms = 10000;
cfg.election_timeout_ms = 1500;
ha_init(&c.ha, &cfg, 0);
c.ha.standby_endpoints = calloc(1, sizeof(zarray_t));
TEST_ASSERT_NOT_NULL(c.ha.standby_endpoints);
zarray_init(c.ha.standby_endpoints, 4, NULL);
/* Heap-allocated endpoint standing in for a real standby connection:
* refcnt starts at 1, representing the owner (the standby zarray)
* holding the creator reference. */
endpoint_t *ep = endpoint_get();
TEST_ASSERT_NOT_NULL(ep);
zarray_store(c.ha.standby_endpoints, ep);
atomic_store(&g_cpto_parked, 0);
atomic_store(&g_cpto_release, 0);
push_thread_send_hook = cpto_parking_send_hook;
cpto_driver_arg_t driver = { .c = &c, .acked = -1, .n = -1 };
pthread_t driver_thread;
TEST_ASSERT_EQUAL_INT(0,
pthread_create(&driver_thread, NULL, cpto_driver_fn, &driver));
TEST_ASSERT_EQUAL_INT_MESSAGE(0, cpto_wait_flag(&g_cpto_parked, 1, 2000),
"push_thread must park in the send hook before we probe refcnt");
TEST_ASSERT_EQUAL_INT_MESSAGE(2,
atomic_load_explicit(&ep->refcnt, memory_order_acquire),
"push_config_transport_only must hold its own ref (owner's 1 + "
"push_thread's 1) while the send is in flight");
/* Simulate the owner's teardown (RDHUP -> zarray_del -> endpoint_killer
* -> endpoint_unref, bug-1298) racing the in-flight push. */
endpoint_unref(ep);
TEST_ASSERT_EQUAL_INT_MESSAGE(1,
atomic_load_explicit(&ep->refcnt, memory_order_acquire),
"ep must survive the owner's unref while push_thread is still in "
"flight -- bug-1381");
atomic_store_explicit(&g_cpto_release, 1, memory_order_release);
pthread_join(driver_thread, NULL);
TEST_ASSERT_EQUAL_INT(1, driver.n);
TEST_ASSERT_EQUAL_INT(1, driver.acked);
/* ep is now freed (push_thread's completion unref dropped the last
* reference) -- do not touch it again. */
push_thread_send_hook = NULL;
zarray_fini(c.ha.standby_endpoints);
free(c.ha.standby_endpoints);
c.ha.standby_endpoints = NULL;
ha_fini(&c.ha);
printf("test_configpush_transport_holds_endpoint_ref_across_send: PASS\n");
}
/* raft-adapter-conformance task 2.1 (Req 2.2, 2.3, 2.5, 7.4): a config-push
* reject must now send an explicit ReplConfigPushReply{accepted=0, term}
* back to the primary instead of returning silently. This is a minimal,
* representative proof that the new config_push_reply_send_hook actually
* fires -- exercised here via ONE reject path (SHA-256 mismatch). Task 2.3
* expands this into full coverage of all four reject paths plus the EAGAIN
* accept-path and the cluster.c term-adoption wiring; this test is kept
* deliberately minimal so it doesn't collide with that broader coverage. */
static uint64_t g_cpr21_hook_term;
static uint64_t g_cpr21_hook_version_tag;
static int g_cpr21_hook_accepted;
static int g_cpr21_hook_called;
static void cpr21_reply_capture(uint64_t term, uint64_t version_tag, int accepted)
{
g_cpr21_hook_called = 1;
g_cpr21_hook_term = term;
g_cpr21_hook_version_tag = version_tag;
g_cpr21_hook_accepted = accepted;
}
static void test_config_push_sha256_mismatch_sends_explicit_reject_reply(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr21_shamis_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t43_attach_myconf(c, tmp);
atomic_store(&c->ha.role, CTRL_STANDBY);
atomic_store(&c->ha.term, 7);
/* Deliberately mismatched payload: raw_sha256 does NOT hash to
* raw_bytes -- exercises the real SHA-256-mismatch reject branch. */
uint8_t payload[16];
memset(payload, 0xAB, sizeof(payload));
uint8_t wrong_sha[32];
memset(wrong_sha, 0x00, sizeof(wrong_sha)); /* SHA256(payload) != all-zero */
repl_config_push_req_t rcpr;
memset(&rcpr, 0, sizeof(rcpr));
rcpr.version_tag = 0x1234;
rcpr.raw_bytes = payload;
rcpr.raw_bytes_len = sizeof(payload);
rcpr.raw_sha256 = wrong_sha;
xce_request_t req;
memset(&req, 0, sizeof(req));
req.body_which = Request_body_replconfigpushrequestmsg;
req.body.replconfigpushrequestmsg = &rcpr;
g_cpr21_hook_called = 0;
config_push_reply_send_hook = cpr21_reply_capture;
int rc = handle_repl_config_push(c, /*ep*/NULL, &req);
config_push_reply_send_hook = NULL; /* uninstall before any assertion can fail */
TEST_ASSERT_EQUAL_INT(-EBADMSG, rc);
TEST_ASSERT_TRUE_MESSAGE(g_cpr21_hook_called,
"raft-adapter-conformance 2.1: a config-push SHA-256 mismatch must "
"send an explicit ReplConfigPushReply, not silence it entirely");
TEST_ASSERT_EQUAL_INT_MESSAGE(0, g_cpr21_hook_accepted,
"the reply for a rejected config push must carry accepted=0");
TEST_ASSERT_EQUAL_UINT64(7, g_cpr21_hook_term);
t43_free_myconf(c);
t42_teardown(c);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmp);
system(cmd);
printf("test_config_push_sha256_mismatch_sends_explicit_reject_reply: PASS\n");
}
/* raft-adapter-conformance task 2.2 (Req 7.4, 7.5): a config-push reply
* arriving on the PRIMARY's inbound standby endpoint now carries the
* replying member's current term (task 1 schema addition + task 2.1 send
* side). myreq_handler's ReplConfigPushReply branch (cluster.c) must route
* that term through raft_on_higher_term_observed -- the SAME term-discovery
* entry point the heartbeat-reply and WAL-NACK vectors already use
* (bug-1421; ha.c ~6650/~6753) -- so a stale-term primary adopts the higher
* term and steps down instead of retrying forever against a standby that
* has already moved on.
*
* Drives the REAL decode+dispatch path: builds the wire bytes exactly as
* the standby's send_config_push_reply puts them on the wire
* (config_repl.c), then pushes them through myreq_handler_for_test -- the
* production myreq_handler exposed for tests (cluster.c), same precedent as
* peer_ctrl_msg_handler_for_test in ha.c.
*
* Fixture mirrors test_intake_higher_term_heartbeat_adopts_term
* (test_term_safety_adapter.c): ha->role is left at CTRL_STANDBY (which
* ha_dispatch_gate admits OPCode_reply for unconditionally, ha.c ~4637) so
* the fixture doesn't need real quorum/replicator plumbing, while the RAFT
* LIBRARY's own role is forced to RAFT_LEADER -- so the "adopt term and
* step down from leadership" observable is scoped precisely to
* raft_on_higher_term_observed's own was_leader/step-down behavior, without
* dragging in the separate CTRL_PRIMARY-demotion side-effect chain (commit
* engine / hooks), which is a different, already-covered code path. */
extern int myreq_handler_for_test(endpoint_t *ep, io_packet_t *pkt);
/* Local fakes satisfying cluster.c's OTHER, unrelated OPCode-switch-case
* dependencies now that cluster.c is linked into controller_unit_test
* (meson.build -- required so myreq_handler_for_test above is reachable at
* all). None of these are exercised by the OPCode_reply/ReplConfigPushReply
* path this test drives; they exist purely to satisfy the linker for
* cluster.c's other switch cases (job/task/scheduler/apiserver/get/
* clusterconf handling), which pull in task.c/opget.c/sched.c/apiserver.c/
* myconf.c -- files intentionally NOT part of this binary (see the sched.c/
* dataex.c comment above sched_push_unit_test_src, meson.build). Same
* precedent as test_worker_join.c / test_commit_barrier_reply.c's own local
* fakes for on_scheduler_join()/notify()/collect_confvars(). */
int apiserver_init(cluster_t *c)
{ (void)c; return 0; }
int on_task_start(cluster_t *c, xce_task_pidinfo_t *info)
{ (void)c; (void)info; return 0; }
int on_task_fail(cluster_t *c, xce_task_failinfo_t *info)
{ (void)c; (void)info; return 0; }
int on_task_finish(cluster_t *c, xce_task_finish_t *info)
{ (void)c; (void)info; return 0; }
int do_get_op(cluster_t *c, endpoint_t *ep, xce_request_t *req)
{ (void)c; (void)ep; (void)req; return 0; }
int handle_scheduler_leave(cluster_t *c)
{ (void)c; return 0; }
int add_config(void *c, char *name, char *value)
{ (void)c; (void)name; (void)value; return 0; }
cluster_config_t *get_default_conf(void *cl)
{ (void)cl; return NULL; }
int handle_clusterconf(cluster_t *c, endpoint_t *ep, xce_request_t *req)
{ (void)c; (void)ep; (void)req; return 0; }
int do_runtasks(cluster_t *c, endpoint_t *ep, xce_request_t *req)
{ (void)c; (void)ep; (void)req; return 0; }
int handle_apiserver_leave(cluster_t *c, endpoint_t *ep)
{ (void)c; (void)ep; return 0; }
static io_packet_t *cpr22_build_config_push_reply_pkt(int accepted,
uint64_t version_tag,
uint64_t term)
{
struct capn cs;
struct capn_segment *seg;
struct ReplConfigPushReply ack_capn;
ReplConfigPushReply_ptr ack_ptr;
struct RequestReply rr_capn;
RequestReply_ptr rr_ptr;
struct Request rq_capn;
Request_ptr rq_ptr;
io_packet_t *pkt;
capn_init_malloc(&cs);
seg = capn_root(&cs).seg;
memset(&ack_capn, 0, sizeof(ack_capn));
ack_capn.accepted = accepted ? 1 : 0;
ack_capn.versionTag = version_tag;
ack_capn.term = term;
ack_ptr = new_ReplConfigPushReply(seg);
write_ReplConfigPushReply(&ack_capn, ack_ptr);
memset(&rr_capn, 0, sizeof(rr_capn));
rr_capn.seq = 1;
rr_capn.opcode = OPCode_replConfigPush;
rr_capn.status = 0;
rr_capn.data_which = RequestReply_data_replconfigpushreplymsg;
rr_capn.data.replconfigpushreplymsg = ack_ptr;
rr_ptr = new_RequestReply(seg);
write_RequestReply(&rr_capn, rr_ptr);
memset(&rq_capn, 0, sizeof(rq_capn));
rq_capn.opcode = OPCode_reply;
rq_capn.seq = 1;
rq_capn.body_which = Request_body_replymsg;
rq_capn.body.replymsg = rr_ptr;
rq_ptr = new_Request(seg);
write_Request(&rq_capn, rq_ptr);
capn_setp(capn_root(&cs), 0, rq_ptr.p);
pkt = calloc(1, sizeof(*pkt));
TEST_ASSERT_NOT_NULL_MESSAGE(pkt, "config-push reply pkt alloc");
pkt->sz = capn_size(&cs);
TEST_ASSERT_TRUE_MESSAGE(alloc_packet(pkt) >= 0,
"config-push reply pkt data alloc");
capn_write_mem(&cs, (uint8_t *)pkt->data, (size_t)pkt->sz, 0);
capn_free(&cs);
return pkt;
}
static void test_config_push_reply_higher_term_adopts_and_steps_down(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr22_term_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
atomic_store(&c->ha.role, CTRL_STANDBY);
atomic_store(&c->ha.term, 5);
ha_init_raft(&c->ha, c, /*n_peers*/3);
c->ha.raft.term = 5;
c->ha.raft.role = RAFT_LEADER;
endpoint_t ep;
memset(&ep, 0, sizeof(ep));
ep.owner = c;
/* Reject (accepted=0) carrying a higher term (9 > 5): Req 7.4/7.5
* require the term check to fire regardless of accept/reject -- a
* rejected push can still carry a useful higher term. */
io_packet_t *pkt =
cpr22_build_config_push_reply_pkt(/*accepted*/0,
/*version_tag*/0xABCD,
/*term*/9);
TEST_ASSERT_NOT_NULL(pkt);
int rc = myreq_handler_for_test(&ep, pkt);
TEST_ASSERT_EQUAL_INT(0, rc);
TEST_ASSERT_EQUAL_UINT64_MESSAGE(9, c->ha.raft.term,
"raft-adapter-conformance 7.4: a config-push reply's higher term "
"must be adopted via raft_on_higher_term_observed");
TEST_ASSERT_NOT_EQUAL_INT_MESSAGE(RAFT_LEADER, c->ha.raft.role,
"raft-adapter-conformance 7.5: leadership held at the lower term "
"must be stepped down once a higher term is observed");
/* NOTE: pkt is already fully freed by this point -- myreq_handler_for_test
* routes through myreq_handler -> xce_decode(), and xce_decode()
* unconditionally calls free_packet(pkt)+FREEUP(pkt) before returning
* (request.c). Do NOT free pkt here: it is a dangling pointer to freed
* memory and a second free_packet()/free() on it is a heap
* use-after-free/double-free (caught by ASAN regardless of
* detect_leaks). See myreq_handler_for_test's doc comment in cluster.c
* for the corrected ownership contract. */
t42_teardown(c);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmp);
system(cmd);
printf("test_config_push_reply_higher_term_adopts_and_steps_down: PASS\n");
}
/* raft-adapter-conformance task 2.3 (Req 2.2, 2.3, 2.5, 7.4): task 2.1's own
* test (above) proved only ONE of the four handle_repl_config_push reject
* early-returns actually invokes the send-hook (SHA-256 mismatch). This
* closes the gap for the FIRST reject condition: a malformed request
* (body_which mismatch or a NULL replconfigpushrequestmsg payload). */
static void test_config_push_malformed_request_sends_explicit_reject_reply(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr23_malformed_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t43_attach_myconf(c, tmp);
atomic_store(&c->ha.role, CTRL_STANDBY);
atomic_store(&c->ha.term, 11);
/* Malformed: body_which claims a config-push request, but the payload
* pointer itself is NULL -- the adapter's own dereference guard. */
xce_request_t req;
memset(&req, 0, sizeof(req));
req.body_which = Request_body_replconfigpushrequestmsg;
req.body.replconfigpushrequestmsg = NULL;
g_cpr21_hook_called = 0;
config_push_reply_send_hook = cpr21_reply_capture;
int rc = handle_repl_config_push(c, /*ep*/NULL, &req);
config_push_reply_send_hook = NULL; /* uninstall before any assertion can fail */
TEST_ASSERT_EQUAL_INT(-EINVAL, rc);
TEST_ASSERT_TRUE_MESSAGE(g_cpr21_hook_called,
"raft-adapter-conformance 2.3: a malformed config-push request must "
"send an explicit ReplConfigPushReply, not silence it entirely");
TEST_ASSERT_EQUAL_INT_MESSAGE(0, g_cpr21_hook_accepted,
"the reply for a malformed config-push request must carry accepted=0");
TEST_ASSERT_EQUAL_UINT64(11, g_cpr21_hook_term);
t43_free_myconf(c);
t42_teardown(c);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmp);
system(cmd);
printf("test_config_push_malformed_request_sends_explicit_reject_reply: PASS\n");
}
/* raft-adapter-conformance task 2.3 (Req 2.2, 2.3, 2.5, 7.4): the SECOND
* reject condition -- a well-formed envelope whose payload is missing bytes
* and/or a sha256 -- must also send an explicit reject reply. */
static void test_config_push_missing_bytes_sends_explicit_reject_reply(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr23_missing_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t43_attach_myconf(c, tmp);
atomic_store(&c->ha.role, CTRL_STANDBY);
atomic_store(&c->ha.term, 12);
/* Well-formed envelope, but bytes/len/sha256 are entirely absent. */
repl_config_push_req_t rcpr;
memset(&rcpr, 0, sizeof(rcpr));
rcpr.version_tag = 0x4242;
rcpr.raw_bytes = NULL;
rcpr.raw_bytes_len = 0;
rcpr.raw_sha256 = NULL;
xce_request_t req;
memset(&req, 0, sizeof(req));
req.body_which = Request_body_replconfigpushrequestmsg;
req.body.replconfigpushrequestmsg = &rcpr;
g_cpr21_hook_called = 0;
config_push_reply_send_hook = cpr21_reply_capture;
int rc = handle_repl_config_push(c, /*ep*/NULL, &req);
config_push_reply_send_hook = NULL; /* uninstall before any assertion can fail */
TEST_ASSERT_EQUAL_INT(-EINVAL, rc);
TEST_ASSERT_TRUE_MESSAGE(g_cpr21_hook_called,
"raft-adapter-conformance 2.3: missing bytes/sha256 must send an "
"explicit ReplConfigPushReply, not silence it entirely");
TEST_ASSERT_EQUAL_INT_MESSAGE(0, g_cpr21_hook_accepted,
"the reply for missing bytes/sha256 must carry accepted=0");
TEST_ASSERT_EQUAL_UINT64(12, g_cpr21_hook_term);
t43_free_myconf(c);
t42_teardown(c);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmp);
system(cmd);
printf("test_config_push_missing_bytes_sends_explicit_reject_reply: PASS\n");
}
/* raft-adapter-conformance task 2.3 (Req 2.2, 2.3, 2.5, 7.4): the FOURTH
* reject condition -- a local conf_save_config() failure -- must also send
* an explicit reject reply. conf_save_config is forced to fail
* deterministically by planting its target "conf" directory as a plain FILE
* instead: mkdir(conf_dir, 0700) then fails with EEXIST (tolerated --
* conf_save_config only bails on a DIFFERENT errno), but the very next step
* -- open()ing a path INSIDE conf_dir -- hits ENOTDIR because conf_dir is
* not actually a directory. This gives a real, deterministic failure without
* relying on filesystem permission semantics (chmod-based EACCES tricks are
* unreliable when the test runs as a privileged/sandboxed uid). */
static void test_config_push_save_failure_sends_explicit_reject_reply(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr23_savefail_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t43_attach_myconf(c, tmp);
atomic_store(&c->ha.role, CTRL_STANDBY);
atomic_store(&c->ha.term, 13);
/* persist_init (t42_make_cluster) already creates tmp/ctrl-test/data/...
* which brings tmp/ctrl-test itself into existence -- tolerate EEXIST. */
char instdir[512];
snprintf(instdir, sizeof(instdir), "%s/ctrl-test", tmp);
TEST_ASSERT_TRUE_MESSAGE(mkdir(instdir, 0700) == 0 || errno == EEXIST,
"must be able to ensure the myconf effective_dir exists for the fixture");
char conf_as_file[560];
snprintf(conf_as_file, sizeof(conf_as_file), "%s/conf", instdir);
int trap_fd = open(conf_as_file, O_WRONLY | O_CREAT | O_TRUNC, 0600);
TEST_ASSERT_TRUE_MESSAGE(trap_fd >= 0, "must be able to plant the conf-as-file trap");
close(trap_fd);
uint8_t payload[16];
memset(payload, 0xCD, sizeof(payload));
uint8_t sha[32];
SHA256(payload, sizeof(payload), sha);
repl_config_push_req_t rcpr;
memset(&rcpr, 0, sizeof(rcpr));
rcpr.version_tag = 0x5353;
rcpr.raw_bytes = payload;
rcpr.raw_bytes_len = sizeof(payload);
rcpr.raw_sha256 = sha;
xce_request_t req;
memset(&req, 0, sizeof(req));
req.body_which = Request_body_replconfigpushrequestmsg;
req.body.replconfigpushrequestmsg = &rcpr;
g_cpr21_hook_called = 0;
config_push_reply_send_hook = cpr21_reply_capture;
int rc = handle_repl_config_push(c, /*ep*/NULL, &req);
config_push_reply_send_hook = NULL; /* uninstall before any assertion can fail */
TEST_ASSERT_TRUE_MESSAGE(rc != 0,
"the conf-as-file trap must make conf_save_config fail (rc != 0)");
TEST_ASSERT_TRUE_MESSAGE(g_cpr21_hook_called,
"raft-adapter-conformance 2.3: a conf_save_config failure must send "
"an explicit ReplConfigPushReply, not silence it entirely");
TEST_ASSERT_EQUAL_INT_MESSAGE(0, g_cpr21_hook_accepted,
"the reply for a conf_save_config failure must carry accepted=0");
TEST_ASSERT_EQUAL_UINT64(13, g_cpr21_hook_term);
t43_free_myconf(c);
t42_teardown(c);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmp);
system(cmd);
printf("test_config_push_save_failure_sends_explicit_reject_reply: PASS\n");
}
/* raft-adapter-conformance task 2.3 (Req 2.2, 2.3, 2.5, 7.5): the
* `-EAGAIN`-from-config_activate_committed activation-defer branch must
* still send accepted=1 -- activation-deferred is NOT a rejection (the
* bytes WERE saved out-of-band successfully; only the separate,
* committed-marker-gated activation step is deferred). Fixture mirrors
* test_push_path_mismatch_does_not_preactivate (config-upgrade-snapshot
* task 4.3 remediation r1) but drives the REAL handle_repl_config_push
* entry point end-to-end instead of calling config_activate_committed
* directly, and observes the reply via the send-hook installed by task
* 2.1. */
static void test_config_push_eagain_activation_deferred_still_sends_accepted(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr23_eagain_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
t42_make_leader(c, /*term*/14, /*n_peers*/1);
TEST_ASSERT_EQUAL_INT(0,
commit_engine_init(&c->commit, &c->persist, 1, 8));
repl_set_commit_engine(&c->persist.repl, &c->commit);
t43_attach_myconf(c, tmp);
/* A committed marker references blob B (sha B) -- the config the
* cluster agreed to, whose bytes have NOT yet arrived here. */
size_t blenB = 0;
uint8_t *bytesB = t43_make_config_blob(&blenB);
bytesB[blenB - 1] ^= 0x5A; /* perturb -> distinct sha */
uint8_t shaB[32];
SHA256(bytesB, blenB, shaB);
uint64_t tagB; { uint64_t t; memcpy(&t, shaB, 8); tagB = be64toh(t); }
t43_commit_marker(c, tagB, shaB);
free(bytesB);
/* The push delivers blob A -- a DIFFERENT config than the committed
* marker references. conf_save_config succeeds (the transit sha256
* verification is self-consistent), but config_activate_committed()
* then defers with -EAGAIN because blob A doesn't hash-verify against
* the committed marker. */
size_t blenA = 0;
uint8_t *bytesA = t43_make_config_blob(&blenA);
uint8_t shaA[32];
SHA256(bytesA, blenA, shaA);
TEST_ASSERT_FALSE(memcmp(shaA, shaB, 32) == 0);
repl_config_push_req_t rcpr;
memset(&rcpr, 0, sizeof(rcpr));
{ uint64_t t; memcpy(&t, shaA, 8); rcpr.version_tag = be64toh(t); }
rcpr.raw_bytes = bytesA;
rcpr.raw_bytes_len = blenA;
rcpr.raw_sha256 = shaA;
xce_request_t req;
memset(&req, 0, sizeof(req));
req.body_which = Request_body_replconfigpushrequestmsg;
req.body.replconfigpushrequestmsg = &rcpr;
g_cpr21_hook_called = 0;
config_push_reply_send_hook = cpr21_reply_capture;
int rc = handle_repl_config_push(c, /*ep*/NULL, &req);
config_push_reply_send_hook = NULL; /* uninstall before any assertion can fail */
free(bytesA);
TEST_ASSERT_EQUAL_INT(0, rc);
/* Still fenced -- proves the -EAGAIN branch was genuinely taken, not
* the plain-success branch (which would clear the fence). */
TEST_ASSERT_EQUAL_INT(1, config_serve_fenced(c));
TEST_ASSERT_TRUE_MESSAGE(g_cpr21_hook_called,
"raft-adapter-conformance 2.3: the -EAGAIN activation-defer path "
"must still send an explicit ReplConfigPushReply");
TEST_ASSERT_EQUAL_INT_MESSAGE(1, g_cpr21_hook_accepted,
"raft-adapter-conformance 2.5/7.5: activation-deferred (-EAGAIN) is "
"NOT a rejection -- the reply must carry accepted=1");
TEST_ASSERT_EQUAL_UINT64(14, g_cpr21_hook_term);
t43_free_myconf(c);
commit_engine_fini(&c->commit);
t42_teardown(c);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmp);
system(cmd);
printf("test_config_push_eagain_activation_deferred_still_sends_accepted: PASS\n");
}
/* raft-adapter-conformance task 2.3 (Req 7.4, 7.5): task 2.2's own test
* (test_config_push_reply_higher_term_adopts_and_steps_down, above) only
* exercised the term-adoption check on a REJECTED (accepted=0) reply.
* Req 7.4/7.5 require the term check to fire "regardless of accept/reject"
* -- this closes that gap by driving the identical real dispatch path
* (myreq_handler_for_test) with accepted=1 instead. */
static void test_config_push_reply_higher_term_adopts_on_accept(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr23_termacc_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
atomic_store(&c->ha.role, CTRL_STANDBY);
atomic_store(&c->ha.term, 5);
ha_init_raft(&c->ha, c, /*n_peers*/3);
c->ha.raft.term = 5;
c->ha.raft.role = RAFT_LEADER;
endpoint_t ep;
memset(&ep, 0, sizeof(ep));
ep.owner = c;
/* Accept (accepted=1) carrying a higher term (9 > 5): the term-adoption
* check must fire on the ACCEPT branch exactly as it does on reject. */
io_packet_t *pkt =
cpr22_build_config_push_reply_pkt(/*accepted*/1,
/*version_tag*/0xBEEF,
/*term*/9);
TEST_ASSERT_NOT_NULL(pkt);
int rc = myreq_handler_for_test(&ep, pkt);
TEST_ASSERT_EQUAL_INT(0, rc);
TEST_ASSERT_EQUAL_UINT64_MESSAGE(9, c->ha.raft.term,
"raft-adapter-conformance 7.4: a config-push ACCEPT reply's higher "
"term must also be adopted via raft_on_higher_term_observed");
TEST_ASSERT_NOT_EQUAL_INT_MESSAGE(RAFT_LEADER, c->ha.raft.role,
"raft-adapter-conformance 7.5: leadership held at the lower term "
"must be stepped down once a higher term is observed, even on the "
"accept branch");
/* pkt is already fully freed at this point (myreq_handler_for_test ->
* xce_decode() unconditionally frees it) -- see the ownership note on
* test_config_push_reply_higher_term_adopts_and_steps_down above
* (bug-1482). Do NOT free pkt here. */
t42_teardown(c);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmp);
system(cmd);
printf("test_config_push_reply_higher_term_adopts_on_accept: PASS\n");
}
#endif /* XCE_TESTING */
/* ── raw capnp shims (Task A) ───────────────────── */
/* Test 1: xce_replconfig_req_ssl encodes a request that round-trips
* through the capnp decoder and preserves the version_tag. */
static void test_replconfig_req_ssl_encode(void)
{
int sv[2];
TEST_ASSERT_EQUAL_INT(0, socketpair(AF_UNIX, SOCK_STREAM, 0, sv));
/* Wrap the writer end of the socketpair in a bare BIO/SSL pair so we
* can call SSL_write without doing a TLS handshake. Instead, we use
* a memory BIO and let xce_replconfig_req_ssl write into it. */
SSL_library_init();
SSL_CTX *ctx = SSL_CTX_new(TLS_client_method());
TEST_ASSERT_NOT_NULL(ctx);
SSL *ssl = SSL_new(ctx);
TEST_ASSERT_NOT_NULL(ssl);
/* Attach the writer fd as the underlying BIO. We don't perform a
* handshake; SSL_write will just SYSCALL through to the fd. This
* works because BIO_set_nbio is off and OpenSSL is willing to
* write plaintext until handshake completes — except newer OpenSSL
* refuses. Use a simpler approach: do the encode + raw fd write. */
/* Cleaner approach: bypass SSL wrapper and just exercise the encode
* by re-using the public helper but with our own raw fd write.
* We test the encoding path by invoking xce_replconfig_req_ssl
* with a properly-constructed SSL only if available, otherwise
* fall back to capnp encode verification via the public function
* called against a duplicated socket pair. */
SSL_free(ssl);
SSL_CTX_free(ctx);
/* Use a pipe-based "raw" verification: capnp encode the request
* ourselves the same way the function does, then decode and check
* version_tag. This validates the wire layout without requiring
* a full SSL handshake in unit tests. */
{
struct capn c;
struct capn_segment *cs;
struct Request rq;
struct ReplConfigRequest req_struct;
ReplConfigRequest_ptr req_ptr;
Request_ptr rp;
capn_init_malloc(&c);
cs = capn_root(&c).seg;
memset(&rq, 0, sizeof(rq));
memset(&req_struct, 0, sizeof(req_struct));
req_struct.versionTag = 0xdeadbeefcafef00dULL;
req_ptr = new_ReplConfigRequest(cs);
write_ReplConfigRequest(&req_struct, req_ptr);
rq.opcode = OPCode_replConfig;
rq.body_which = Request_body_replconfigrequestmsg;
rq.body.replconfigrequestmsg = req_ptr;
encode_PeerInfo_ptr(cs, &rq.from, NULL);
rp = new_Request(cs);
write_Request(&rq, rp);
capn_setp(capn_root(&c), 0, rp.p);
int64_t sz = capn_size(&c);
TEST_ASSERT_TRUE(sz > 0);
uint8_t *buf = (uint8_t *)malloc((size_t)sz);
TEST_ASSERT_NOT_NULL(buf);
capn_write_mem(&c, buf, (size_t)sz, 0);
capn_free(&c);
/* Decode and verify */
struct capn d;
TEST_ASSERT_EQUAL_INT(0, capn_init_mem(&d, buf, (size_t)sz, 0));
Request_ptr dp;
dp.p = capn_getp(capn_root(&d), 0, 1);
struct Request drq;
read_Request(&drq, dp);
TEST_ASSERT_EQUAL_INT(OPCode_replConfig, drq.opcode);
TEST_ASSERT_EQUAL_INT(Request_body_replconfigrequestmsg,
drq.body_which);
ReplConfigRequest_ptr drp = drq.body.replconfigrequestmsg;
struct ReplConfigRequest drs;
read_ReplConfigRequest(&drs, drp);
TEST_ASSERT_EQUAL_UINT64(0xdeadbeefcafef00dULL, drs.versionTag);
capn_free(&d);
free(buf);
}
close(sv[0]);
close(sv[1]);
printf("test_replconfig_req_ssl_encode: PASS\n");
}
/* Test 2: xce_replconfig_reply_raw — verify NULL endpoint returns
* -EINVAL and that the encode path with real bytes preserves the
* sha256 and bytes payloads through a round-trip decoder. */
static void test_replconfig_reply_raw_encode(void)
{
/* NULL endpoint guard */
{
uint8_t sha[32];
uint8_t cfg[64];
memset(sha, 0xaa, sizeof(sha));
memset(cfg, 0xbb, sizeof(cfg));
TEST_ASSERT_EQUAL_INT(-EINVAL,
xce_replconfig_reply_raw(NULL, NULL, 1, 0x42,
sha, sizeof(sha),
cfg, sizeof(cfg)));
}
/* Encode-path test: directly build the same capnp structure that
* xce_replconfig_reply_raw builds, then walk down Request →
* RequestReply → ReplConfigReply and read sha256/bytes via raw
* capn_list8 access. */
{
struct capn c;
struct capn_segment *cs;
struct Request rq;
struct RequestReply rr;
struct ReplConfigReply reply_struct;
ReplConfigReply_ptr reply_ptr;
RequestReply_ptr rr_ptr;
Request_ptr rp;
const uint64_t tag = 0xfeedfacecafebabeULL;
const uint64_t seq = 99;
uint8_t sha256[32];
uint8_t config[128];
for (size_t i = 0; i < sizeof(sha256); i++) sha256[i] = (uint8_t)(0x10 + i);
for (size_t i = 0; i < sizeof(config); i++) config[i] = (uint8_t)(i * 3);
capn_init_malloc(&c);
cs = capn_root(&c).seg;
memset(&rq, 0, sizeof(rq));
memset(&rr, 0, sizeof(rr));
memset(&reply_struct, 0, sizeof(reply_struct));
reply_struct.upToDate = 0;
reply_struct.versionTag = tag;
{
capn_list8 sl = capn_new_list8(cs, (int)sizeof(sha256));
capn_setv8(sl, 0, sha256, (int)sizeof(sha256));
reply_struct.sha256.p = sl.p;
}
{
capn_list8 bl = capn_new_list8(cs, (int)sizeof(config));
capn_setv8(bl, 0, config, (int)sizeof(config));
reply_struct.bytes.p = bl.p;
}
reply_ptr = new_ReplConfigReply(cs);
write_ReplConfigReply(&reply_struct, reply_ptr);
rr.seq = seq;
rr.opcode = OPCode_replConfig;
rr.status = 0;
rr.data_which = RequestReply_data_replconfigreplymsg;
rr.data.replconfigreplymsg = reply_ptr;
rr_ptr = new_RequestReply(cs);
write_RequestReply(&rr, rr_ptr);
rq.opcode = OPCode_reply;
rq.seq = seq;
rq.body_which = Request_body_replymsg;
rq.body.replymsg = rr_ptr;
encode_PeerInfo_ptr(cs, &rq.from, NULL);
rp = new_Request(cs);
write_Request(&rq, rp);
capn_setp(capn_root(&c), 0, rp.p);
int64_t sz = capn_size(&c);
uint8_t *buf = (uint8_t *)malloc((size_t)sz);
capn_write_mem(&c, buf, (size_t)sz, 0);
capn_free(&c);
/* Decode */
struct capn d;
capn_init_mem(&d, buf, (size_t)sz, 0);
Request_ptr dp; dp.p = capn_getp(capn_root(&d), 0, 1);
struct Request drq;
read_Request(&drq, dp);
TEST_ASSERT_EQUAL_INT(Request_body_replymsg, drq.body_which);
struct RequestReply drr;
read_RequestReply(&drr, drq.body.replymsg);
TEST_ASSERT_EQUAL_INT(RequestReply_data_replconfigreplymsg,
drr.data_which);
struct ReplConfigReply drs;
read_ReplConfigReply(&drs, drr.data.replconfigreplymsg);
TEST_ASSERT_EQUAL_INT(0, drs.upToDate);
TEST_ASSERT_EQUAL_UINT64(tag, drs.versionTag);
capn_list8 ds; ds.p = drs.sha256.p;
capn_list8 db; db.p = drs.bytes.p;
TEST_ASSERT_EQUAL_INT(32, capn_len(ds));
TEST_ASSERT_EQUAL_INT(128, capn_len(db));
uint8_t got_sha[32];
uint8_t got_cfg[128];
TEST_ASSERT_EQUAL_INT(32, capn_getv8(ds, 0, got_sha, 32));
TEST_ASSERT_EQUAL_INT(128, capn_getv8(db, 0, got_cfg, 128));
TEST_ASSERT_EQUAL_INT(0, memcmp(got_sha, sha256, 32));
TEST_ASSERT_EQUAL_INT(0, memcmp(got_cfg, config, 128));
capn_free(&d);
free(buf);
}
printf("test_replconfig_reply_raw_encode: PASS\n");
}
/* Test 3: xce_upgrade_config_req_extract_raw — build a raw
* OP_upgradeConfig packet using the same list8 bypass pattern, then
* parse it back and verify sha256 + bytes are recovered intact. */
static void test_upgrade_config_req_extract_raw(void)
{
const uint8_t sha256[32] = {
0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,
0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0x10,
0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,
0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f,0x20 };
const uint8_t cfg[] = "fake-upgrade-config-blob-payload-data";
const size_t cfglen = sizeof(cfg) - 1;
/* Build a raw OP_upgradeConfig request packet */
struct capn c;
struct capn_segment *cs;
struct Request rq;
struct UpgradeConfigRequest u_struct;
UpgradeConfigRequest_ptr u_ptr;
Request_ptr rp;
capn_init_malloc(&c);
cs = capn_root(&c).seg;
memset(&rq, 0, sizeof(rq));
memset(&u_struct, 0, sizeof(u_struct));
{
capn_list8 sl = capn_new_list8(cs, (int)sizeof(sha256));
capn_setv8(sl, 0, sha256, (int)sizeof(sha256));
u_struct.sha256.p = sl.p;
}
{
capn_list8 bl = capn_new_list8(cs, (int)cfglen);
capn_setv8(bl, 0, cfg, (int)cfglen);
u_struct.bytes.p = bl.p;
}
u_ptr = new_UpgradeConfigRequest(cs);
write_UpgradeConfigRequest(&u_struct, u_ptr);
rq.opcode = OPCode_upgradeConfig;
rq.body_which = Request_body_upgradeconfigrequestmsg;
rq.body.upgradeconfigrequestmsg = u_ptr;
encode_PeerInfo_ptr(cs, &rq.from, NULL);
rp = new_Request(cs);
write_Request(&rq, rp);
capn_setp(capn_root(&c), 0, rp.p);
int64_t sz = capn_size(&c);
uint8_t *buf = (uint8_t *)malloc((size_t)sz);
capn_write_mem(&c, buf, (size_t)sz, 0);
capn_free(&c);
/* Extract via the function under test */
uint8_t *out_bytes = NULL;
uint8_t *out_sha256 = NULL;
size_t out_len = 0;
int rc = xce_upgrade_config_req_extract_raw(buf, (size_t)sz,
&out_bytes, &out_len,
&out_sha256);
TEST_ASSERT_EQUAL_INT(0, rc);
TEST_ASSERT_NOT_NULL(out_sha256);
TEST_ASSERT_NOT_NULL(out_bytes);
TEST_ASSERT_EQUAL_INT((int)cfglen, (int)out_len);
TEST_ASSERT_EQUAL_INT(0, memcmp(out_sha256, sha256, 32));
TEST_ASSERT_EQUAL_INT(0, memcmp(out_bytes, cfg, cfglen));
free(out_bytes);
free(out_sha256);
free(buf);
/* xce_upgrade_config_req_extract: returns -EINVAL on a zeroed request
* (body_which is 0, not Request_body_upgradeconfigrequestmsg). */
{
xce_request_t dummy_req;
memset(&dummy_req, 0, sizeof(dummy_req));
uint8_t *b = NULL, *s = NULL;
size_t l = 0;
TEST_ASSERT_EQUAL_INT(-EINVAL,
xce_upgrade_config_req_extract(&dummy_req, &b, &l, &s));
}
printf("test_upgrade_config_req_extract_raw: PASS\n");
}
/* ── Task 2.1: OPCode_walCatchupEntry handler ────────────────────────────── */
#ifdef XCE_TESTING
/* Helpers shared by Task 2.1 tests: create/destroy a minimal persist_t. */
static persist_t *make_test_persist_catchup(char *tmpdir_out, size_t sz)
{
persist_t *p = calloc(1, sizeof(persist_t));
if (!p) { fprintf(stderr, "calloc failed\n"); exit(1); }
persist_config_t cfg = persist_config_defaults();
cfg.wal_sync_ms = 5000; /* no real fsync in unit tests */
snprintf(tmpdir_out, sz, "/tmp/xce_catchup_XXXXXX");
if (!mkdtemp(tmpdir_out)) {
fprintf(stderr, "mkdtemp failed\n");
free(p);
exit(1);
}
persist_set_workdir(p, tmpdir_out, "ctrl-catchup");
persist_init(p, &cfg, NULL);
persist_start(p);
return p;
}
static void destroy_test_persist_catchup(persist_t *p)
{
persist_stop(p);
persist_fini(p);
free(p);
}
/* bug-850/851 contiguity guard (persist.c:839): persist_wal_write_replicated
* REFUSES a forward gap (entry.lsn > current_lsn → -EAGAIN) so a standby never
* creates a WAL hole. A fresh persist has current_lsn == 1 (LSN 0 reserved,
* persist.c:542). The catch-up tests below choose their own non-1 starting LSNs
* (42, 10, 20, …); seed current_lsn to the first applied entry's LSN so the
* first entry is contiguous (entry.lsn == current_lsn) and the guard accepts
* the in-order stream — mirroring the real catch-up streamer, which streams
* contiguously from current_lsn. current_lsn is a plain lock-protected field;
* persist.c sets it directly under p->lock (e.g. persist.c:542,715), so do the
* same here. */
static void seed_persist_current_lsn(persist_t *p, uint64_t next_lsn)
{
pthread_mutex_lock(&p->lock);
p->current_lsn = next_lsn;
pthread_mutex_unlock(&p->lock);
}
/* Test 2.1-A: successful single WAL entry advances applied_lsn */
static void test_wal_catchup_entry_advances_applied_lsn(void)
{
char tmpdir[256];
persist_t *p = make_test_persist_catchup(tmpdir, sizeof(tmpdir));
ha_state_t ha;
memset(&ha, 0, sizeof(ha));
ha_config_t cfg;
memset(&cfg, 0, sizeof(cfg));
cfg.heartbeat_timeout_ms = 10000;
cfg.election_timeout_ms = 1500;
ha_init(&ha, &cfg, 0);
/* applied_lsn starts at 0 */
TEST_ASSERT_EQUAL_UINT64(0,
(uint64_t)atomic_load_explicit(&ha.applied_lsn, memory_order_acquire));
/* Seed current_lsn so the entry at LSN 42 is contiguous (bug-850 guard). */
seed_persist_current_lsn(p, 42);
/* Build a single-entry WAL catch-up with LSN=42, no payload */
wal_catchup_entry_t entry;
memset(&entry, 0, sizeof(entry));
entry.lsn = 42;
entry.entry_type = (uint8_t)WAL_JOB_UPDATE;
entry.payload = NULL; /* payload_len=0; apply_wal_entry handles NULL */
entry.n_entries = 0;
entry.entries = NULL;
/* GREEN will implement ha_apply_wal_catchup_entry() */
int rc = ha_apply_wal_catchup_entry(&ha, p, &entry, NULL, NULL);
TEST_ASSERT_EQUAL_INT(0, rc);
/* bug-991: applied_lsn is the LAST CONTIGUOUSLY-HELD LSN, so a single applied
* entry at LSN 42 advances applied_lsn to 42 (NOT 43). The +1 over-advertised
* the standby's watermark and made the leader's catch-up streamer skip the
* real next-needed LSN. */
TEST_ASSERT_EQUAL_UINT64(42,
(uint64_t)atomic_load_explicit(&ha.applied_lsn, memory_order_acquire));
ha_fini(&ha);
destroy_test_persist_catchup(p);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_wal_catchup_entry_advances_applied_lsn: PASS\n");
}
/* Test 2.1-B: apply_wal_entry failure (NULL persist = -EINVAL) is logged and
* skipped — applied_lsn must NOT advance, handler must not crash.
* Req 3.3: corrupt/error entries are logged and skipped without crashing. */
static void test_wal_catchup_entry_error_skipped_no_crash(void)
{
ha_state_t ha;
memset(&ha, 0, sizeof(ha));
ha_config_t cfg;
memset(&cfg, 0, sizeof(cfg));
cfg.heartbeat_timeout_ms = 10000;
cfg.election_timeout_ms = 1500;
ha_init(&ha, &cfg, 0);
atomic_store_explicit(&ha.applied_lsn, 10, memory_order_release);
/* Pass NULL persist — apply_wal_entry returns -EINVAL for NULL p */
wal_catchup_entry_t entry;
memset(&entry, 0, sizeof(entry));
entry.lsn = 99;
entry.entry_type = (uint8_t)WAL_JOB_UPDATE;
entry.payload = NULL;
entry.n_entries = 0;
entry.entries = NULL;
/* Handler must NOT crash; must log ERROR; applied_lsn must remain at 10 */
int rc = ha_apply_wal_catchup_entry(&ha, /*persist=*/NULL, &entry, NULL, NULL);
/* rc is non-zero (error propagated from apply_wal_entry(-EINVAL)) */
TEST_ASSERT_TRUE(rc != 0);
/* applied_lsn must not advance on failure */
TEST_ASSERT_EQUAL_UINT64(10,
(uint64_t)atomic_load_explicit(&ha.applied_lsn, memory_order_acquire));
ha_fini(&ha);
printf("test_wal_catchup_entry_error_skipped_no_crash: PASS\n");
}
/* bug-1479: a term-carrying entry that fails logOk (forward gap / genuine
* (term,lsn) conflict) must now send a NACK {success=0} back to the primary,
* not silence the reject entirely -- otherwise the primary's NACK-handling
* (ha_raft_on_repl_nack, ha.c) can never engage, no matter how correct it is,
* because nothing ever produces the reply it is waiting for. This is exactly
* the live gap the config-upgrade soak's force-elect rotation exposed: a
* standby that fell behind (a genuine forward gap against its empty log)
* looped rejecting the identical re-broadcast entry forever, with no NACK
* ever reaching the primary to trigger backoff + catch-up.
*
* ha_wal_ack_send_hook (ha.h, XCE_TESTING) captures the {term, lsn, success}
* that ha_send_wal_ack_reply_ex would have sent, without a live endpoint. */
static uint64_t g_b1479_hook_term;
static uint64_t g_b1479_hook_lsn;
static int g_b1479_hook_success;
static int g_b1479_hook_called;
static void b1479_wal_ack_capture(uint64_t term, uint64_t lsn, int success)
{
g_b1479_hook_called = 1;
g_b1479_hook_term = term;
g_b1479_hook_lsn = lsn;
g_b1479_hook_success = success;
}
static void test_bug1479_ae_reject_sends_nack_not_silence(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr_b1479_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
/* Bring the node up as a raft FOLLOWER at term 3 with an EMPTY log
* (log_len=0) -- mirrors t_bug1475_make_follower further below in this
* file (that fixture is defined later; duplicated inline here to avoid
* an ordering dependency). */
atomic_store(&c->ha.role, CTRL_STANDBY);
atomic_store(&c->ha.term, 3);
ha_init_raft(&c->ha, c, /*n_peers*/3);
c->ha.raft.term = 3;
c->ha.raft.role = RAFT_FOLLOWER;
TEST_ASSERT_EQUAL_UINT64(0, c->ha.raft.log_len);
g_b1479_hook_called = 0;
ha_wal_ack_send_hook = b1479_wal_ack_capture;
/* A term-carrying entry at lsn=5 whose prev_log_index=4 is a forward gap
* against this node's empty log (0 < 4) -- logOk MUST reject it. */
wal_catchup_entry_t inner;
memset(&inner, 0, sizeof(inner));
inner.lsn = 5;
inner.term = 3;
inner.prev_log_index = 4;
inner.prev_log_term = 3;
inner.entry_type = (uint8_t)WAL_JOB_UPDATE;
wal_catchup_entry_t *sub_arr[1] = { &inner };
wal_catchup_entry_t outer;
memset(&outer, 0, sizeof(outer));
outer.n_entries = 1;
outer.entries = sub_arr;
int rc = ha_apply_wal_catchup_entry(&c->ha, &c->persist, &outer,
/*ep*/NULL, c);
ha_wal_ack_send_hook = NULL; /* uninstall before any assertion can fail */
TEST_ASSERT_EQUAL_INT(0, rc); /* reject, not a hard error */
TEST_ASSERT_EQUAL_UINT64(0, c->ha.raft.log_len); /* nothing was accepted */
TEST_ASSERT_TRUE_MESSAGE(g_b1479_hook_called,
"bug-1479: an AppendEntries reject must send a WalAckReply "
"(a NACK), not silence it entirely");
TEST_ASSERT_EQUAL_INT_MESSAGE(0, g_b1479_hook_success,
"the reply for a rejected entry must carry success=0");
TEST_ASSERT_EQUAL_UINT64(3, g_b1479_hook_term);
TEST_ASSERT_EQUAL_UINT64(5, g_b1479_hook_lsn);
t42_teardown(c);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmp);
system(cmd);
printf("test_bug1479_ae_reject_sends_nack_not_silence: PASS\n");
}
/* Test 2.1-C: NULL entry is handled gracefully (null guard) */
static void test_wal_catchup_entry_null_entry_no_crash(void)
{
ha_state_t ha;
memset(&ha, 0, sizeof(ha));
ha_config_t cfg;
memset(&cfg, 0, sizeof(cfg));
cfg.heartbeat_timeout_ms = 10000;
cfg.election_timeout_ms = 1500;
ha_init(&ha, &cfg, 0);
/* NULL entry — must not crash, must return error */
int rc = ha_apply_wal_catchup_entry(&ha, NULL, NULL, NULL, NULL);
TEST_ASSERT_TRUE(rc != 0);
ha_fini(&ha);
printf("test_wal_catchup_entry_null_entry_no_crash: PASS\n");
}
/* ── Task 2.2: batch WAL catch-up entries on standby ─────────────────────── */
/* Test 2.2-A: batch of 3 entries — applied_lsn advances to last+1.
* Requirements 5.3, 5.5: apply each in order, advance after full batch. */
static void test_wal_catchup_batch_advances_applied_lsn(void)
{
char tmpdir[256];
persist_t *p = make_test_persist_catchup(tmpdir, sizeof(tmpdir));
ha_state_t ha;
memset(&ha, 0, sizeof(ha));
ha_config_t cfg;
memset(&cfg, 0, sizeof(cfg));
cfg.heartbeat_timeout_ms = 10000;
cfg.election_timeout_ms = 1500;
ha_init(&ha, &cfg, 0);
/* applied_lsn starts at 0 */
TEST_ASSERT_EQUAL_UINT64(0,
(uint64_t)atomic_load_explicit(&ha.applied_lsn, memory_order_acquire));
/* Seed current_lsn so the batch [10,11,12] is contiguous (bug-850 guard). */
seed_persist_current_lsn(p, 10);
/* Build 3 sub-entries at LSNs 10, 11, 12 */
wal_catchup_entry_t e0, e1, e2;
memset(&e0, 0, sizeof(e0));
memset(&e1, 0, sizeof(e1));
memset(&e2, 0, sizeof(e2));
e0.lsn = 10; e0.entry_type = (uint8_t)WAL_JOB_UPDATE;
e1.lsn = 11; e1.entry_type = (uint8_t)WAL_JOB_UPDATE;
e2.lsn = 12; e2.entry_type = (uint8_t)WAL_JOB_UPDATE;
wal_catchup_entry_t *batch_entries[3] = { &e0, &e1, &e2 };
/* Outer entry carries the batch; lsn/entry_type ignored when n_entries > 0 */
wal_catchup_entry_t outer;
memset(&outer, 0, sizeof(outer));
outer.n_entries = 3;
outer.entries = batch_entries;
int rc = ha_apply_wal_catchup_entry(&ha, p, &outer, NULL, NULL);
TEST_ASSERT_EQUAL_INT(0, rc);
/* bug-991: applied_lsn = last contiguously-held LSN = last_entry->lsn = 12
* (NOT 13). */
TEST_ASSERT_EQUAL_UINT64(12,
(uint64_t)atomic_load_explicit(&ha.applied_lsn, memory_order_acquire));
ha_fini(&ha);
destroy_test_persist_catchup(p);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_wal_catchup_batch_advances_applied_lsn: PASS\n");
}
/* Test 2.2-B: partial batch (2 of max 3) — applied_lsn advances correctly.
* Requirement 5.4: partial batch (fewer than max) sent and applied without wait. */
static void test_wal_catchup_partial_batch(void)
{
char tmpdir[256];
persist_t *p = make_test_persist_catchup(tmpdir, sizeof(tmpdir));
ha_state_t ha;
memset(&ha, 0, sizeof(ha));
ha_config_t cfg;
memset(&cfg, 0, sizeof(cfg));
cfg.heartbeat_timeout_ms = 10000;
cfg.election_timeout_ms = 1500;
ha_init(&ha, &cfg, 0);
/* Pre-set applied_lsn to 5 to verify monotonic advance */
atomic_store_explicit(&ha.applied_lsn, 5, memory_order_release);
/* Seed current_lsn so the batch [20,21] is contiguous (bug-850 guard). */
seed_persist_current_lsn(p, 20);
wal_catchup_entry_t e0, e1;
memset(&e0, 0, sizeof(e0));
memset(&e1, 0, sizeof(e1));
e0.lsn = 20; e0.entry_type = (uint8_t)WAL_JOB_UPDATE;
e1.lsn = 21; e1.entry_type = (uint8_t)WAL_JOB_UPDATE;
wal_catchup_entry_t *batch_entries[2] = { &e0, &e1 };
wal_catchup_entry_t outer;
memset(&outer, 0, sizeof(outer));
outer.n_entries = 2;
outer.entries = batch_entries;
int rc = ha_apply_wal_catchup_entry(&ha, p, &outer, NULL, NULL);
TEST_ASSERT_EQUAL_INT(0, rc);
/* bug-991: applied_lsn = last contiguously-held LSN = 21 (NOT 22). Monotonic:
* advances from the pre-set 5 to 21. */
TEST_ASSERT_EQUAL_UINT64(21,
(uint64_t)atomic_load_explicit(&ha.applied_lsn, memory_order_acquire));
ha_fini(&ha);
destroy_test_persist_catchup(p);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_wal_catchup_partial_batch: PASS\n");
}
/* Test 2.2-C: batch with one error entry — error is logged and skipped,
* remaining entries are still applied, applied_lsn advances for the good ones.
* Requirement 3.3/5.5: error in batch → skip that entry, continue with rest. */
static void test_wal_catchup_batch_error_entry_skipped(void)
{
char tmpdir[256];
persist_t *p = make_test_persist_catchup(tmpdir, sizeof(tmpdir));
ha_state_t ha;
memset(&ha, 0, sizeof(ha));
ha_config_t cfg;
memset(&cfg, 0, sizeof(cfg));
cfg.heartbeat_timeout_ms = 10000;
cfg.election_timeout_ms = 1500;
ha_init(&ha, &cfg, 0);
/* Seed current_lsn so the first good entry at LSN 30 is contiguous (bug-850
* guard). The NULL sub-entry is skipped (no write, current_lsn stays at 31);
* the test only requires applied_lsn >= 30 (the first good entry held). */
seed_persist_current_lsn(p, 30);
/* Good entry at LSN 30, then a NULL pointer (simulates corrupt entry),
* then good entry at LSN 32. */
wal_catchup_entry_t e0, e2;
memset(&e0, 0, sizeof(e0));
memset(&e2, 0, sizeof(e2));
e0.lsn = 30; e0.entry_type = (uint8_t)WAL_JOB_UPDATE;
e2.lsn = 32; e2.entry_type = (uint8_t)WAL_JOB_UPDATE;
/* NULL in the middle represents a missing/corrupt sub-entry */
wal_catchup_entry_t *batch_entries[3] = { &e0, NULL, &e2 };
wal_catchup_entry_t outer;
memset(&outer, 0, sizeof(outer));
outer.n_entries = 3;
outer.entries = batch_entries;
/* Handler must not crash; applied_lsn advances for successful entries */
int rc = ha_apply_wal_catchup_entry(&ha, p, &outer, NULL, NULL);
/* Overall rc == 0: outer batch call succeeds even with inner skips */
TEST_ASSERT_EQUAL_INT(0, rc);
/* bug-991: applied_lsn = last contiguously-held LSN. e0 (LSN 30) applies,
* the NULL sub-entry is skipped, e2 (LSN 32) applies → last-held is 32 (or at
* least 30 if e2 were dropped). Must reach at least 30 (e0 held). */
uint64_t final_lsn = (uint64_t)atomic_load_explicit(&ha.applied_lsn,
memory_order_acquire);
TEST_ASSERT_TRUE(final_lsn >= 30);
ha_fini(&ha);
destroy_test_persist_catchup(p);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_wal_catchup_batch_error_entry_skipped: PASS\n");
}
/* Test 2.2-D: n_entries==0 falls through to single-entry path (backward compat) */
static void test_wal_catchup_batch_zero_entries_fallback(void)
{
char tmpdir[256];
persist_t *p = make_test_persist_catchup(tmpdir, sizeof(tmpdir));
ha_state_t ha;
memset(&ha, 0, sizeof(ha));
ha_config_t cfg;
memset(&cfg, 0, sizeof(cfg));
cfg.heartbeat_timeout_ms = 10000;
cfg.election_timeout_ms = 1500;
ha_init(&ha, &cfg, 0);
/* Seed current_lsn so the fallback single entry at LSN 50 is contiguous
* (bug-850 guard). */
seed_persist_current_lsn(p, 50);
/* n_entries == 0 → single-entry path from task 2.1 */
wal_catchup_entry_t entry;
memset(&entry, 0, sizeof(entry));
entry.lsn = 50;
entry.entry_type = (uint8_t)WAL_JOB_UPDATE;
entry.n_entries = 0;
entry.entries = NULL;
int rc = ha_apply_wal_catchup_entry(&ha, p, &entry, NULL, NULL);
TEST_ASSERT_EQUAL_INT(0, rc);
/* bug-991: single-entry path advances applied_lsn to the last-held LSN = 50
* (NOT 51). */
TEST_ASSERT_EQUAL_UINT64(50,
(uint64_t)atomic_load_explicit(&ha.applied_lsn, memory_order_acquire));
ha_fini(&ha);
destroy_test_persist_catchup(p);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_wal_catchup_batch_zero_entries_fallback: PASS\n");
}
/* ── Task 6.2: additional WAL catch-up unit tests ───────────────────────── */
/* Test 6.2-A: batch of exactly 256 entries (the maximum batch size from the
* sender side, Requirement 5.2) — all applied, applied_lsn advances by 256.
* Tests: "apply batch of 256" from task 6.2 spec.
* Requirements 3.1, 3.5, 5.3, 5.5. */
static void test_wal_catchup_batch_256_entries(void)
{
char tmpdir[256];
persist_t *p = make_test_persist_catchup(tmpdir, sizeof(tmpdir));
ha_state_t ha;
memset(&ha, 0, sizeof(ha));
ha_config_t cfg;
memset(&cfg, 0, sizeof(cfg));
cfg.heartbeat_timeout_ms = 10000;
cfg.election_timeout_ms = 1500;
ha_init(&ha, &cfg, 0);
/* Seed current_lsn so the consecutive batch starting at LSN 1000 is
* contiguous (bug-850 guard). */
seed_persist_current_lsn(p, 1000);
/* Allocate 256 sub-entries at consecutive LSNs starting at 1000 */
const int N = 256;
wal_catchup_entry_t entries[N];
wal_catchup_entry_t *ptrs[N];
for (int i = 0; i < N; i++) {
memset(&entries[i], 0, sizeof(entries[i]));
entries[i].lsn = (uint64_t)(1000 + i);
entries[i].entry_type = (uint8_t)WAL_JOB_UPDATE;
entries[i].n_entries = 0;
entries[i].entries = NULL;
ptrs[i] = &entries[i];
}
wal_catchup_entry_t outer;
memset(&outer, 0, sizeof(outer));
outer.n_entries = N;
outer.entries = ptrs;
/* applied_lsn starts at 0 */
TEST_ASSERT_EQUAL_UINT64(0,
(uint64_t)atomic_load_explicit(&ha.applied_lsn, memory_order_acquire));
int rc = ha_apply_wal_catchup_entry(&ha, p, &outer, NULL, NULL);
TEST_ASSERT_EQUAL_INT(0, rc);
/* bug-991: applied_lsn = last contiguously-held LSN = last_entry->lsn =
* 1000+255 = 1255 (NOT 1256). */
TEST_ASSERT_EQUAL_UINT64(1255,
(uint64_t)atomic_load_explicit(&ha.applied_lsn, memory_order_acquire));
ha_fini(&ha);
destroy_test_persist_catchup(p);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_wal_catchup_batch_256_entries: PASS\n");
}
/* Test 6.2-B: applied_lsn advances only AFTER the full batch is written, not
* during mid-batch entry application. This verifies Req 5.5: the standby's
* next heartbeat reply reflects the post-batch state, not a partial state.
*
* Strategy: start with a pre-set applied_lsn, apply a batch of 4 entries,
* verify that applied_lsn does NOT advance to an intermediate value and IS
* exactly the last contiguously-held LSN at the end (bug-991: last_lsn, not
* last_lsn+1). We confirm the "only-after-full-batch" invariant by checking the
* exact final value equals last_lsn (not some intermediate held LSN from a
* mid-batch advance).
* Requirements 5.3, 5.5. */
static void test_wal_catchup_batch_applied_lsn_only_after_full_batch(void)
{
char tmpdir[256];
persist_t *p = make_test_persist_catchup(tmpdir, sizeof(tmpdir));
ha_state_t ha;
memset(&ha, 0, sizeof(ha));
ha_config_t cfg;
memset(&cfg, 0, sizeof(cfg));
cfg.heartbeat_timeout_ms = 10000;
cfg.election_timeout_ms = 1500;
ha_init(&ha, &cfg, 0);
/* Pre-set applied_lsn to a known value so we can distinguish partial
* from full advance. */
atomic_store_explicit(&ha.applied_lsn, 100, memory_order_release);
/* Seed current_lsn so the batch [200..203] is contiguous (bug-850 guard). */
seed_persist_current_lsn(p, 200);
/* Build a batch of 4 entries at LSNs 200, 201, 202, 203 */
wal_catchup_entry_t e0, e1, e2, e3;
memset(&e0, 0, sizeof(e0));
memset(&e1, 0, sizeof(e1));
memset(&e2, 0, sizeof(e2));
memset(&e3, 0, sizeof(e3));
e0.lsn = 200; e0.entry_type = (uint8_t)WAL_JOB_UPDATE;
e1.lsn = 201; e1.entry_type = (uint8_t)WAL_JOB_UPDATE;
e2.lsn = 202; e2.entry_type = (uint8_t)WAL_JOB_UPDATE;
e3.lsn = 203; e3.entry_type = (uint8_t)WAL_JOB_UPDATE;
wal_catchup_entry_t *ptrs[4] = { &e0, &e1, &e2, &e3 };
wal_catchup_entry_t outer;
memset(&outer, 0, sizeof(outer));
outer.n_entries = 4;
outer.entries = ptrs;
int rc = ha_apply_wal_catchup_entry(&ha, p, &outer, NULL, NULL);
TEST_ASSERT_EQUAL_INT(0, rc);
/* bug-991: applied_lsn must be exactly 203 (the last contiguously-held LSN) —
* the post-batch value. The test for correctness is that the final value
* equals the LAST entry's lsn, not any intermediate held LSN.
* Specifically, it must NOT remain at 200 or 201 (partial advance). */
uint64_t final_lsn = (uint64_t)atomic_load_explicit(&ha.applied_lsn,
memory_order_acquire);
/* Must have advanced past starting value (100) */
TEST_ASSERT_GREATER_THAN_UINT64(100, final_lsn);
/* Must equal the last-held LSN (203), not any intermediate value */
TEST_ASSERT_EQUAL_UINT64(203, final_lsn);
ha_fini(&ha);
destroy_test_persist_catchup(p);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_wal_catchup_batch_applied_lsn_only_after_full_batch: PASS\n");
}
/* ── Task 2.3: OPCode_nop heartbeat reply carries stateReport ──────────── */
#ifdef XCE_TESTING
/* Test seam declared in cluster.c under #ifdef XCE_TESTING —
* fills *sr from ha->applied_lsn / myconf->config_version_tag,
* sets reply_out->data_which = stateReportMsg and reply_out->data.state_report = sr.
* Req 1.1, 1.3, 1.4. */
void ha_nop_reply_state_report(ha_state_t *ha, myconf_t *myconf,
state_report_t *sr, xce_reply_t *reply_out);
/* Test 2.3-A: nop reply carries stateReport with applied_lsn and config_tag.
* Requirements 1.1, 1.3, 1.4: standby populates stateReport in every
* OPCode_nop heartbeat reply with current applied_lsn and config_version_tag. */
static void test_nop_reply_carries_state_report(void)
{
ha_state_t ha;
memset(&ha, 0, sizeof(ha));
ha_config_t cfg;
memset(&cfg, 0, sizeof(cfg));
cfg.heartbeat_timeout_ms = 10000;
cfg.election_timeout_ms = 1500;
ha_init(&ha, &cfg, 0);
/* Set a known applied_lsn */
atomic_store_explicit(&ha.applied_lsn, 12345ULL, memory_order_release);
/* Build a minimal myconf with a known config_version_tag */
myconf_t myconf;
memset(&myconf, 0, sizeof(myconf));
myconf.config_version_tag = 0xABCD1234ULL;
state_report_t sr;
memset(&sr, 0, sizeof(sr));
xce_reply_t reply;
memset(&reply, 0, sizeof(reply));
ha_nop_reply_state_report(&ha, &myconf, &sr, &reply);
/* Reply must use stateReportMsg discriminant */
TEST_ASSERT_EQUAL_INT(RequestReply_data_stateReportMsg, reply.data_which);
/* state_report pointer must point at our sr */
TEST_ASSERT_EQUAL_PTR(&sr, reply.data.state_report);
/* applied_lsn must match ha->applied_lsn */
TEST_ASSERT_EQUAL_UINT64(12345ULL, sr.applied_lsn);
/* config_tag must match myconf->config_version_tag */
TEST_ASSERT_EQUAL_UINT64(0xABCD1234ULL, sr.config_tag);
ha_fini(&ha);
printf("test_nop_reply_carries_state_report: PASS\n");
}
/* Test 2.3-B: nop reply when applied_lsn==0 (fresh standby, no config).
* Requirement 1.4: config_tag reports zero when no config received yet. */
static void test_nop_reply_zero_state_fresh_standby(void)
{
ha_state_t ha;
memset(&ha, 0, sizeof(ha));
ha_config_t cfg;
memset(&cfg, 0, sizeof(cfg));
cfg.heartbeat_timeout_ms = 10000;
cfg.election_timeout_ms = 1500;
ha_init(&ha, &cfg, 0);
/* applied_lsn stays at 0; config_version_tag stays at 0 → no config yet */
myconf_t myconf;
memset(&myconf, 0, sizeof(myconf));
state_report_t sr;
memset(&sr, 0, sizeof(sr));
xce_reply_t reply;
memset(&reply, 0, sizeof(reply));
ha_nop_reply_state_report(&ha, &myconf, &sr, &reply);
TEST_ASSERT_EQUAL_INT(RequestReply_data_stateReportMsg, reply.data_which);
TEST_ASSERT_EQUAL_PTR(&sr, reply.data.state_report);
TEST_ASSERT_EQUAL_UINT64(0ULL, sr.applied_lsn);
TEST_ASSERT_EQUAL_UINT64(0ULL, sr.config_tag);
ha_fini(&ha);
printf("test_nop_reply_zero_state_fresh_standby: PASS\n");
}
#endif /* XCE_TESTING */
#endif /* XCE_TESTING */
/* ── Task 3.4: ha_stream_wal_to_standby batch WAL streaming ──────────────── */
#ifdef XCE_TESTING
/*
* xce_wal_stream_request_hook: test-only seam declared in config_repl.c.
* When non-NULL, ha_stream_wal_to_standby() calls this INSTEAD OF xce_request()
* for each batch message, allowing tests to inspect and count batches without
* a real endpoint.
*
* Signature: int hook(endpoint_t *ep, xce_request_t *req)
* ep — outbound endpoint (may be NULL in tests)
* req — the batch OPCode_walCatchupEntry request being sent
* Returns 0 on success (the hook owns no resources in the req).
*/
extern int (*xce_wal_stream_request_hook)(endpoint_t *ep, xce_request_t *req);
/* Helper: write N minimal WAL entries into a single segment file in wal_dir.
* Entries have consecutive LSNs starting at start_lsn.
* Returns 0 on success, -1 on error. */
static int write_test_wal_segment(const char *wal_dir, uint64_t start_lsn,
int n_entries)
{
char seg_path[4096];
snprintf(seg_path, sizeof(seg_path),
"%s/seg-%016" PRIx64 ".wal", wal_dir, start_lsn);
int fd = open(seg_path, O_WRONLY | O_CREAT | O_TRUNC, 0600);
if (fd < 0) return -1;
for (int i = 0; i < n_entries; i++) {
wal_entry_hdr_t hdr;
memset(&hdr, 0, sizeof(hdr));
hdr.lsn = start_lsn + (uint64_t)i;
hdr.type = WAL_JOB_UPDATE;
hdr.payload_len = 0;
hdr.term = 1;
ssize_t nw = write(fd, &hdr, sizeof(hdr));
if (nw != (ssize_t)sizeof(hdr)) { close(fd); return -1; }
}
close(fd);
return 0;
}
/* Batch-counting state for the hook */
static int g_wal_stream_batch_count = 0;
static int g_wal_stream_total_entries = 0;
static int g_wal_stream_last_n_entries = 0;
static int counting_wal_stream_hook(endpoint_t *ep, xce_request_t *req)
{
(void)ep;
if (!req || !req->body.walcatchupentrymsg) return 0;
wal_catchup_entry_t *batch = (wal_catchup_entry_t *)req->body.walcatchupentrymsg;
g_wal_stream_batch_count++;
g_wal_stream_last_n_entries = batch->n_entries;
g_wal_stream_total_entries += batch->n_entries;
return 0;
}
/*
* Test 3.4-A: streaming 500 entries produces exactly 2 batches
* (batch 1: 256 entries, batch 2: 244 entries).
* Requirement 5.2: accumulate up to 256 entries per batch.
* Requirement 5.4: partial final batch is sent immediately.
*/
static void test_wal_stream_500_entries_two_batches(void)
{
/* Set up WAL directory with 500 consecutive entries starting at LSN 1 */
char tmpdir[256];
snprintf(tmpdir, sizeof(tmpdir), "/tmp/xce_wal_stream_%d_%ld",
(int)getpid(), (long)time(NULL));
TEST_ASSERT_EQUAL_INT(0, mkdir(tmpdir, 0700));
/* Write all 500 entries in a single segment starting at LSN 1 */
int rc = write_test_wal_segment(tmpdir, /*start_lsn=*/1, /*n_entries=*/500);
TEST_ASSERT_EQUAL_INT_MESSAGE(0, rc, "Failed to write test WAL segment");
/* Install counting hook */
xce_wal_stream_request_hook = counting_wal_stream_hook;
g_wal_stream_batch_count = 0;
g_wal_stream_total_entries = 0;
g_wal_stream_last_n_entries = 0;
/* Stream entries [1..500]: standby_lsn=0, committed_lsn=500 */
rc = ha_stream_wal_to_standby(/*ep=*/NULL, tmpdir, /*p=*/NULL,
/*leader_term=*/7,
/*standby_lsn=*/0,
/*committed_lsn=*/500);
TEST_ASSERT_EQUAL_INT_MESSAGE(0, rc, "ha_stream_wal_to_standby failed");
TEST_ASSERT_EQUAL_INT_MESSAGE(2, g_wal_stream_batch_count,
"500 entries must produce exactly 2 batches (256+244)");
TEST_ASSERT_EQUAL_INT_MESSAGE(500, g_wal_stream_total_entries,
"All 500 entries must be sent");
TEST_ASSERT_EQUAL_INT_MESSAGE(244, g_wal_stream_last_n_entries,
"Final batch must contain 244 entries (500 - 256)");
xce_wal_stream_request_hook = NULL;
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_wal_stream_500_entries_two_batches: PASS\n");
}
/*
* Test 3.4-B: streaming fewer than 256 entries produces exactly 1 partial batch.
* Requirement 5.4: partial final batch sent immediately without waiting.
*/
static void test_wal_stream_partial_batch(void)
{
char tmpdir[256];
snprintf(tmpdir, sizeof(tmpdir), "/tmp/xce_wal_stream_partial_%d_%ld",
(int)getpid(), (long)time(NULL));
TEST_ASSERT_EQUAL_INT(0, mkdir(tmpdir, 0700));
/* Write 10 entries starting at LSN 5 */
int rc = write_test_wal_segment(tmpdir, /*start_lsn=*/5, /*n_entries=*/10);
TEST_ASSERT_EQUAL_INT(0, rc);
xce_wal_stream_request_hook = counting_wal_stream_hook;
g_wal_stream_batch_count = 0;
g_wal_stream_total_entries = 0;
g_wal_stream_last_n_entries = 0;
/* Stream entries [6..14]: standby_lsn=5, committed_lsn=14 */
rc = ha_stream_wal_to_standby(/*ep=*/NULL, tmpdir, /*p=*/NULL,
/*leader_term=*/7,
/*standby_lsn=*/5,
/*committed_lsn=*/14);
TEST_ASSERT_EQUAL_INT_MESSAGE(0, rc, "ha_stream_wal_to_standby failed");
TEST_ASSERT_EQUAL_INT_MESSAGE(1, g_wal_stream_batch_count,
"< 256 entries must produce exactly 1 partial batch");
TEST_ASSERT_EQUAL_INT_MESSAGE(9, g_wal_stream_total_entries,
"9 entries in range [6..14] must be sent");
xce_wal_stream_request_hook = NULL;
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_wal_stream_partial_batch: PASS\n");
}
/*
* Test 3.4-C: empty range (standby_lsn == committed_lsn) sends zero batches.
* Requirement 5.4: no batch is sent when there are no entries to stream.
*/
static void test_wal_stream_empty_range_no_batches(void)
{
char tmpdir[256];
snprintf(tmpdir, sizeof(tmpdir), "/tmp/xce_wal_stream_empty_%d_%ld",
(int)getpid(), (long)time(NULL));
TEST_ASSERT_EQUAL_INT(0, mkdir(tmpdir, 0700));
xce_wal_stream_request_hook = counting_wal_stream_hook;
g_wal_stream_batch_count = 0;
g_wal_stream_total_entries = 0;
/* standby_lsn == committed_lsn: nothing to stream */
int rc = ha_stream_wal_to_standby(/*ep=*/NULL, tmpdir, /*p=*/NULL,
/*leader_term=*/7,
/*standby_lsn=*/100,
/*committed_lsn=*/100);
TEST_ASSERT_EQUAL_INT_MESSAGE(0, rc, "Empty range must return 0");
TEST_ASSERT_EQUAL_INT_MESSAGE(0, g_wal_stream_batch_count,
"Empty range must produce zero batches");
xce_wal_stream_request_hook = NULL;
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_wal_stream_empty_range_no_batches: PASS\n");
}
/* Write N entries starting at start_lsn where entries[checkpoint_idx] (0-based
* within the range) is a WAL_CHECKPOINT marker (local-only, never a logical
* Raft entry — persist_write_checkpoint_marker consumes a real LSN slot for
* it, exactly like a live checkpoint firing mid-stream would). All other
* entries are WAL_JOB_UPDATE. */
static int write_test_wal_segment_with_checkpoint_at(const char *wal_dir,
uint64_t start_lsn,
int n_entries,
int checkpoint_idx)
{
char seg_path[4096];
snprintf(seg_path, sizeof(seg_path),
"%s/seg-%016" PRIx64 ".wal", wal_dir, start_lsn);
int fd = open(seg_path, O_WRONLY | O_CREAT | O_TRUNC, 0600);
if (fd < 0) return -1;
for (int i = 0; i < n_entries; i++) {
wal_entry_hdr_t hdr;
memset(&hdr, 0, sizeof(hdr));
hdr.lsn = start_lsn + (uint64_t)i;
hdr.type = (i == checkpoint_idx) ? WAL_CHECKPOINT : WAL_JOB_UPDATE;
hdr.payload_len = 0;
hdr.term = 1;
ssize_t nw = write(fd, &hdr, sizeof(hdr));
if (nw != (ssize_t)sizeof(hdr)) { close(fd); return -1; }
}
close(fd);
return 0;
}
/* Captures every streamed entry's lsn/entry_type/prev_log_index across all
* batches, in send order. */
#define CAP_CKPT_MAX 32
static uint64_t g_cap_ckpt_lsn[CAP_CKPT_MAX];
static uint8_t g_cap_ckpt_type[CAP_CKPT_MAX];
static uint64_t g_cap_ckpt_prev_idx[CAP_CKPT_MAX];
static int g_cap_ckpt_count = 0;
static int capture_all_entries_wal_stream_hook(endpoint_t *ep, xce_request_t *req)
{
(void)ep;
if (!req || !req->body.walcatchupentrymsg) return 0;
wal_catchup_entry_t *batch =
(wal_catchup_entry_t *)req->body.walcatchupentrymsg;
for (int i = 0; i < batch->n_entries && g_cap_ckpt_count < CAP_CKPT_MAX; i++) {
wal_catchup_entry_t *e = batch->entries[i];
if (!e) continue;
g_cap_ckpt_lsn[g_cap_ckpt_count] = e->lsn;
g_cap_ckpt_type[g_cap_ckpt_count] = e->entry_type;
g_cap_ckpt_prev_idx[g_cap_ckpt_count] = e->prev_log_index;
g_cap_ckpt_count++;
}
return 0;
}
/*
* The catch-up streamer must SKIP WAL_CHECKPOINT markers entirely — they are
* local-only bookkeeping (persist_write_checkpoint_marker's own doc comment:
* "replay_wal SKIPS checkpoint markers... the recovered index never holds a
* checkpoint LSN; the live index must match"), never a logical Raft log
* entry, and never sent on the live broadcast path either
* (persist_wal_write_replicated rejects type==WAL_CHECKPOINT with -EINVAL).
*
* Fixture: LSN [1..5], LSN 3 is a checkpoint marker (consumes a real LSN slot,
* exactly like a live checkpoint firing mid-range). Streaming standby_lsn=0,
* committed_lsn=5 must emit exactly 4 real entries (1,2,4,5), never lsn=3.
*
* bug-1475 (UPDATED, supersedes the original assertion): the entry after the
* gap (lsn=4) must now chain prev_log_index=3 -- the checkpoint's OWN lsn --
* NOT 2 (the last real entry before it). The original assertion here (prev_
* log_index=2, "not the skipped marker's lsn=3") encoded the OLD, DEFECTIVE
* design: a receiving standby that has itself already applied the same
* committed WAL_CONFIG_MARKER independently writes its OWN local checkpoint
* at the identical LSN (persist_write_checkpoint_marker runs deterministically
* on every member that applies the marker's commit, not just the sender), so
* the checkpoint's LSN is a real, HELD position on both sides -- not a gap to
* skip past. Never advancing the tracker across it left every subsequent
* prev_log_index permanently one below the receiver's true log length,
* producing a permanent post-checkpoint catch-up stall (ae_reject_logmismatch
* forever, zero progress every heartbeat) -- root-caused and fixed as part of
* bug-1475; see ha_apply_term_entry_via_library's bug-1475 fix (ha.c) for the
* matching receive-side co-tracking half of this fix, and
* test_bug1475_catchup_survives_midstream_checkpoint below for the full
* end-to-end (send+receive) regression proof.
*
* RED before the ORIGINAL bug (pre-existing, already fixed): the streamer
* built/sent a catchup_entry for every hdr.type with no filter at all, so
* lsn=3/type=WAL_CHECKPOINT itself was shipped as a real entry.
*/
static void test_wal_stream_skips_checkpoint_marker(void)
{
char tmpdir[256];
snprintf(tmpdir, sizeof(tmpdir), "/tmp/xce_wal_stream_ckpt_%d_%ld",
(int)getpid(), (long)time(NULL));
TEST_ASSERT_EQUAL_INT(0, mkdir(tmpdir, 0700));
int rc = write_test_wal_segment_with_checkpoint_at(
tmpdir, /*start_lsn=*/1, /*n_entries=*/5, /*checkpoint_idx=*/2);
TEST_ASSERT_EQUAL_INT(0, rc);
xce_wal_stream_request_hook = capture_all_entries_wal_stream_hook;
g_cap_ckpt_count = 0;
rc = ha_stream_wal_to_standby(/*ep=*/NULL, tmpdir, /*p=*/NULL,
/*leader_term=*/7,
/*standby_lsn=*/0,
/*committed_lsn=*/5);
TEST_ASSERT_EQUAL_INT_MESSAGE(0, rc, "ha_stream_wal_to_standby failed");
TEST_ASSERT_EQUAL_INT_MESSAGE(4, g_cap_ckpt_count,
"the checkpoint marker at lsn=3 must never be streamed as an entry "
"(4 real entries: 1,2,4,5)");
for (int i = 0; i < g_cap_ckpt_count; i++) {
TEST_ASSERT_NOT_EQUAL_MESSAGE(3, (int)g_cap_ckpt_lsn[i],
"lsn=3 (the checkpoint marker) must never appear in a streamed entry");
TEST_ASSERT_NOT_EQUAL_MESSAGE((int)WAL_CHECKPOINT, (int)g_cap_ckpt_type[i],
"no streamed entry may carry entry_type==WAL_CHECKPOINT");
}
/* Entries in order must be lsn 1,2,4,5. */
TEST_ASSERT_EQUAL_UINT64_MESSAGE(1, g_cap_ckpt_lsn[0], "entry 0 must be lsn=1");
TEST_ASSERT_EQUAL_UINT64_MESSAGE(2, g_cap_ckpt_lsn[1], "entry 1 must be lsn=2");
TEST_ASSERT_EQUAL_UINT64_MESSAGE(4, g_cap_ckpt_lsn[2], "entry 2 must be lsn=4 (lsn=3 skipped)");
TEST_ASSERT_EQUAL_UINT64_MESSAGE(5, g_cap_ckpt_lsn[3], "entry 3 must be lsn=5");
/* bug-1475: lsn=4 must chain prev_log_index=3 -- the checkpoint's OWN lsn,
* which is a real HELD position on any receiver that independently
* applied the same committed marker -- NOT 2 (the stale, pre-fix value
* that permanently wedged catch-up one entry later; see the updated
* fixture doc comment above and test_bug1475_catchup_survives_
* midstream_checkpoint for the full send+receive proof). */
TEST_ASSERT_EQUAL_UINT64_MESSAGE(3, g_cap_ckpt_prev_idx[2],
"bug-1475: lsn=4 must chain prev_log_index=3 (the checkpoint's own "
"lsn, a real held position on both sides), not the stale lsn=2");
xce_wal_stream_request_hook = NULL;
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_wal_stream_skips_checkpoint_marker: PASS\n");
}
/* ══════════════════════════════════════════════════════════════════════════
* bug-1475 — END-TO-END regression: a standby must NOT permanently stall
* catching up across a mid-stream WAL_CHECKPOINT.
*
* This drives all THREE parts of the fix together through the REAL production
* send+receive path — not just the sender's prev_log_index computation
* (already pinned above) in isolation:
* - SEND side (config_repl.c, ha_stream_wal_to_standby): the tracker now
* advances across a skipped WAL_CHECKPOINT instead of freezing one entry
* behind.
* - RECEIVE side (ha.c, ha_apply_term_entry_via_library): JIT-resyncs
* ha->raft.log_len from persist_durable_floor() before consuming each AE
* — mirroring ha_sync_raft_log_from_recovery's own boot-time computation,
* but applied live, on the same single AE-receive call path (no new lock,
* no cross-thread mutation) — so a receiver whose OWN local checkpoint
* write left log_len stale (bug-1466, deliberately NOT fixed at its root
* by this change) still correctly logOk-accepts the checkpoint's own lsn
* as a valid predecessor.
* - TERM-INDEX side (persist.c, record_entry_term/entry_term_locked):
* a THIRD, previously-undiscovered gap found by live instrumentation of
* THIS test after the first two fixes above still left it RED. The first
* two fixes both rely on `persist_entry_term(checkpoint_lsn)` staying
* "absent" (0) FOREVER on every member (documented design intent in both
* comments above and in persist_write_checkpoint_marker's own comment).
* That was false: record_entry_term's geometric-growth realloc zero-filled
* any skipped gap slot (e.g. the checkpoint's own, deliberately-unrecorded
* LSN), and entry_term_locked's `lsn <= term_index_count` presence check
* then read that zero-fill back as WAL_LEGACY_TERM (1), NOT absent (0),
* the INSTANT any LATER lsn was recorded and grew term_index_count past
* the gap — which happens immediately in this test (and in any live
* cluster) once the leader appends its next real entry after the
* checkpoint. This made the checkpoint LSN's "term" a TIME-DEPENDENT
* value: a fresh read right after the checkpoint returned 0 (absent, as
* designed), but the SAME read after a later entry was appended returned
* 1 — so the sender (which streams AFTER its own later entries exist)
* computed prev_log_term=1 for the entry right after the checkpoint,
* while a receiver that had not yet appended anything past its own
* checkpoint still (correctly, per design) read 0 for the same LSN —
* logOk's equality check then spuriously mismatched (0 != 1) and rejected
* forever. Fixed with a TERM_INDEX_UNSET sentinel (UINT64_MAX) that marks
* a never-explicitly-written slot as absent PERMANENTLY, independent of
* later array growth — see TERM_INDEX_UNSET's comment in persist.c for
* the full mechanism. Confirmed via real fprintf instrumentation at the
* streamer, the JIT resync, and raft.c's logOk check (added and removed
* during this investigation) that prev_log_term flipped from 0 to 1
* exactly at the point lsn=4 was appended, before the persist.c fix; the
* same instrumentation confirmed prev_log_term=0 on both sides and
* log_ok=1 after the fix.
*
* Fixture: a REAL leader persist_t WAL [lsn=1 real, lsn=2 WAL_CHECKPOINT
* (via the real persist_checkpoint()), lsn=3 real, lsn=4 real]. A REAL
* receiver cluster_t independently applies the SAME committed prefix through
* lsn=1 and independently writes its OWN local checkpoint at lsn=2 (exactly
* mirroring persist_write_checkpoint_marker's deterministic per-member
* trigger — every member that applies a committed WAL_CONFIG_MARKER
* checkpoints at the identical LSN, not just the leader). The receiver's
* raft.log_len is left at its STALE, pre-checkpoint value (1) — the exact
* live-write-time gap bug-1466 documents (persist_write_checkpoint_marker
* bypasses raft_log_append, so log_len never advances for a checkpoint on
* its own) — this is the precondition the permanent stall needs.
*
* ha_stream_wal_to_standby streams (standby_lsn=2, committed_lsn=4] and a
* capture-and-replay hook feeds every batch into the REAL
* ha_apply_wal_catchup_entry receive entry point against the receiver —
* exactly the wire hop xce_decode → ha_apply_wal_catchup_entry performs live.
*
* RED (pre-fix, verified live during this investigation by reverting the
* persist.c term-index sentinel fix with the other two parts still in
* place): the receiver
* gets permanently stuck AT OR BEFORE the checkpoint boundary — lsn=3's
* prev_log_index is computed one below where the checkpoint actually left
* the receiver's log, so ha_apply_term_entry_via_library's accept-check
* (persist_entry_term(p, e->lsn) against the ACTUAL write position) never
* matches, no ACK is sent, and every subsequent entry's prev_log_index only
* grows further past the receiver's true (stale) log_len — ae_reject_
* logmismatch forever, zero progress. A second stream of the IDENTICAL range
* makes IDENTICAL zero progress, proving the wedge is permanent, not a
* transient one-round lag.
*
* GREEN (post-fix): the receiver catches all the way up to lsn=4.
* ══════════════════════════════════════════════════════════════════════════ */
/* Bring a node up as a raft FOLLOWER at `term` (mirrors t42_make_leader,
* make_follower in test_term_safety_adapter.c — this file has no standby-role
* helper of its own yet). */
static void t_bug1475_make_follower(cluster_t *c, uint64_t term, int n_peers)
{
atomic_store(&c->ha.role, CTRL_STANDBY);
atomic_store(&c->ha.term, term);
ha_init_raft(&c->ha, c, n_peers);
c->ha.raft.term = term;
c->ha.raft.role = RAFT_FOLLOWER;
}
/* Replay-into-receiver hook: feeds every streamed batch into the REAL
* ha_apply_wal_catchup_entry receive path against g_bug1475_recv, exactly as
* the wire hop (xce_decode) would on a live connection. */
static cluster_t *g_bug1475_recv = NULL;
static int bug1475_replay_hook(endpoint_t *ep, xce_request_t *req)
{
(void)ep;
if (!req || !req->body.walcatchupentrymsg || !g_bug1475_recv)
return 0;
wal_catchup_entry_t *batch =
(wal_catchup_entry_t *)req->body.walcatchupentrymsg;
ha_apply_wal_catchup_entry(&g_bug1475_recv->ha, &g_bug1475_recv->persist,
batch, /*ep*/NULL, g_bug1475_recv);
return 0;
}
static void test_bug1475_catchup_survives_midstream_checkpoint(void)
{
char ltmp[256], rtmp[256];
strcpy(ltmp, "/tmp/xce_cr_b1475_leader_XXXXXX");
strcpy(rtmp, "/tmp/xce_cr_b1475_recv_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(ltmp));
TEST_ASSERT_NOT_NULL(mkdtemp(rtmp));
cluster_t *leader = t42_make_cluster(ltmp);
cluster_t *recv = t42_make_cluster(rtmp);
TEST_ASSERT_NOT_NULL(leader);
TEST_ASSERT_NOT_NULL(recv);
enum { TERM = 3 };
t42_make_leader(leader, TERM, /*n_peers=*/3);
t_bug1475_make_follower(recv, TERM, /*n_peers=*/3);
/* Identical prefix on both members through lsn=1. persist_wal_async is a
* raw WAL write and does not itself update raft.log_len (that only
* happens via ha_primary_log_append/raft_log_append on the real commit
* path) -- both members already correctly hold index 1 (e.g. from a
* prior, successful AE exchange this test does not need to re-simulate),
* so both are seeded here to match. */
persist_set_term(&leader->persist, TERM);
TEST_ASSERT_EQUAL_INT(0,
persist_wal_async(&leader->persist, WAL_JOB_UPDATE, NULL, 0)); /* lsn=1 */
leader->ha.raft.log_len = 1;
persist_set_term(&recv->persist, TERM);
TEST_ASSERT_EQUAL_INT(0,
persist_wal_async(&recv->persist, WAL_JOB_UPDATE, NULL, 0)); /* lsn=1 */
recv->ha.raft.log_len = 1;
/* Each member independently checkpoints at lsn=2 -- the SAME deterministic
* side effect persist_checkpoint_marker_triggered fires on every member
* that applies a committed WAL_CONFIG_MARKER, not just the leader. Force a
* synchronous flush right after so persist_durable_floor() (which the
* ha.c bug-1475 fix reads) reflects it immediately rather than waiting on
* the background fsync_worker's own timer (cfg.wal_sync_ms=5000). */
TEST_ASSERT_EQUAL_INT(0, persist_checkpoint(&leader->persist)); /* lsn=2 */
TEST_ASSERT_EQUAL_INT(0, persist_flush(&leader->persist));
TEST_ASSERT_EQUAL_INT(0, persist_checkpoint(&recv->persist)); /* lsn=2 */
TEST_ASSERT_EQUAL_INT(0, persist_flush(&recv->persist));
/* bug-1466 (unfixed, deliberately NOT touched by this fix): the checkpoint
* write bypassed raft_log_append on BOTH members, so log_len stayed at 1
* on both even though current_lsn moved to 3 -- exactly the precondition
* the live permanent stall needs. */
TEST_ASSERT_EQUAL_UINT64(1, leader->ha.raft.log_len);
TEST_ASSERT_EQUAL_UINT64(1, recv->ha.raft.log_len);
TEST_ASSERT_EQUAL_UINT64(3, (uint64_t)leader->persist.current_lsn);
TEST_ASSERT_EQUAL_UINT64(3, (uint64_t)recv->persist.current_lsn);
/* Leader appends two more REAL entries after the checkpoint. */
persist_set_term(&leader->persist, TERM);
TEST_ASSERT_EQUAL_INT(0,
persist_wal_async(&leader->persist, WAL_JOB_UPDATE, NULL, 0)); /* lsn=3 */
TEST_ASSERT_EQUAL_INT(0,
persist_wal_async(&leader->persist, WAL_JOB_UPDATE, NULL, 0)); /* lsn=4 */
atomic_store_explicit(&leader->persist.committed_lsn, 4,
memory_order_release);
/* Drive the REAL catch-up streamer -> REAL receive path. standby_lsn=2:
* this receiver already durably holds through the checkpoint's own lsn. */
g_bug1475_recv = recv;
xce_wal_stream_request_hook = bug1475_replay_hook;
int rc = ha_stream_wal_to_standby(/*ep=*/NULL, leader->persist.wal_path,
&leader->persist, /*leader_term=*/TERM,
/*standby_lsn=*/2, /*committed_lsn=*/4);
xce_wal_stream_request_hook = NULL;
g_bug1475_recv = NULL;
TEST_ASSERT_EQUAL_INT_MESSAGE(0, rc, "ha_stream_wal_to_standby failed");
uint64_t applied = atomic_load_explicit(&recv->ha.applied_lsn,
memory_order_acquire);
TEST_ASSERT_EQUAL_UINT64_MESSAGE(4, applied,
"bug-1475: the standby must catch all the way up to lsn=4 across the "
"mid-stream checkpoint, not stall permanently at/before it");
TEST_ASSERT_EQUAL_UINT64(4, recv->ha.raft.log_len);
TEST_ASSERT_EQUAL_UINT64(TERM, persist_entry_term(&recv->persist, 4));
/* A SECOND identical stream (the real heartbeat-driven retry) must be a
* clean no-op / re-confirmation, never regress applied_lsn -- proving
* this is genuine convergence, not a one-round fluke. */
g_bug1475_recv = recv;
xce_wal_stream_request_hook = bug1475_replay_hook;
rc = ha_stream_wal_to_standby(/*ep=*/NULL, leader->persist.wal_path,
&leader->persist, /*leader_term=*/TERM,
/*standby_lsn=*/4, /*committed_lsn=*/4);
xce_wal_stream_request_hook = NULL;
g_bug1475_recv = NULL;
TEST_ASSERT_EQUAL_INT(0, rc);
TEST_ASSERT_EQUAL_UINT64(4, atomic_load_explicit(&recv->ha.applied_lsn,
memory_order_acquire));
t42_teardown(leader);
t42_teardown(recv);
printf("test_bug1475_catchup_survives_midstream_checkpoint: PASS\n");
}
/*
* bug-1028 — the catch-up streamer must source each streamed entry's term and
* the AppendEntries prev_log_term from the AUTHORITATIVE per-LSN term index
* (persist_entry_term), NOT the raw on-disk hdr.term. A legacy-0 entry has
* hdr.term==0 on disk but persist_entry_term maps it to WAL_LEGACY_TERM(1) —
* which is exactly what the standby's logOk and the library send path compute.
* If the streamer sends the raw 0, prev_log_term(0) != standby's term(1) → logOk
* rejects the new-term entry forever (the "stream WAL batches" wedge).
*
* Fixture: LSN 1 appended at term 0 (legacy), LSN 2 at term 3. Streaming
* (standby_lsn=1, committed=2] must emit LSN 2 with term=3 and prev_log_term=1
* (NOT 0). RED before the fix (streamer sent hdr.term=0 for the predecessor).
*/
static uint64_t g_cap_term_for_lsn2 = 0;
static uint64_t g_cap_prevterm_for_lsn2 = 0;
static int g_cap_saw_lsn2 = 0;
static int capture_terms_wal_stream_hook(endpoint_t *ep, xce_request_t *req)
{
(void)ep;
if (!req || !req->body.walcatchupentrymsg) return 0;
wal_catchup_entry_t *batch =
(wal_catchup_entry_t *)req->body.walcatchupentrymsg;
for (int i = 0; i < batch->n_entries; i++) {
wal_catchup_entry_t *e = batch->entries[i];
if (e && e->lsn == 2) {
g_cap_saw_lsn2 = 1;
g_cap_term_for_lsn2 = e->term;
g_cap_prevterm_for_lsn2 = e->prev_log_term;
}
}
return 0;
}
static void test_wal_stream_term_from_index_not_raw_hdr(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr_streamterm_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t *c = t42_make_cluster(tmp);
TEST_ASSERT_NOT_NULL(c);
/* LSN 1: legacy entry (term 0 on disk → persist_entry_term maps to 1). */
persist_set_term(&c->persist, 0);
TEST_ASSERT_EQUAL_INT(0, persist_wal_async(&c->persist, WAL_JOB_UPDATE,
NULL, 0));
/* LSN 2: real new-term entry (term 3). */
persist_set_term(&c->persist, 3);
TEST_ASSERT_EQUAL_INT(0, persist_wal_async(&c->persist, WAL_JOB_UPDATE,
NULL, 0));
/* Sanity: the authoritative index normalises legacy-0 → 1, keeps 3. */
TEST_ASSERT_EQUAL_UINT64(WAL_LEGACY_TERM, persist_entry_term(&c->persist, 1));
TEST_ASSERT_EQUAL_UINT64(3, persist_entry_term(&c->persist, 2));
xce_wal_stream_request_hook = capture_terms_wal_stream_hook;
g_cap_saw_lsn2 = 0; g_cap_term_for_lsn2 = 0; g_cap_prevterm_for_lsn2 = 0;
/* Standby holds LSN 1, catching up to committed 2 — streams just LSN 2,
* whose prev tuple references LSN 1 (the legacy entry). */
int rc = ha_stream_wal_to_standby(/*ep=*/NULL, c->persist.wal_path,
&c->persist,
/*leader_term=*/atomic_load_explicit(
&c->ha.term, memory_order_acquire),
/*standby_lsn=*/1, /*committed_lsn=*/2);
TEST_ASSERT_EQUAL_INT_MESSAGE(0, rc, "ha_stream_wal_to_standby failed");
xce_wal_stream_request_hook = NULL;
TEST_ASSERT_TRUE_MESSAGE(g_cap_saw_lsn2, "LSN 2 must be streamed");
TEST_ASSERT_EQUAL_UINT64_MESSAGE(3, g_cap_term_for_lsn2,
"streamed entry term must come from persist_entry_term (3)");
TEST_ASSERT_EQUAL_UINT64_MESSAGE(WAL_LEGACY_TERM, g_cap_prevterm_for_lsn2,
"bug-1028: prev_log_term must be the index-normalised legacy term (1), "
"NOT raw on-disk hdr.term (0) — else the standby's logOk rejects forever");
t42_teardown(c);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmp);
system(cmd);
printf("test_wal_stream_term_from_index_not_raw_hdr: PASS\n");
}
/* ── Task 3.5: Snapshot chunk transfer ──────────────────────── */
static snapshot_transfer_t g_snaptest_chunks[16];
static int g_snaptest_chunk_count = 0;
static void snaptest_reset(void)
{
memset(g_snaptest_chunks, 0, sizeof(g_snaptest_chunks));
g_snaptest_chunk_count = 0;
}
static int snaptest_hook(endpoint_t *ep, xce_request_t *req)
{
(void)ep;
if (g_snaptest_chunk_count >= 16) return -1;
memcpy(&g_snaptest_chunks[g_snaptest_chunk_count],
req->body.snapshottransfermsg, sizeof(snapshot_transfer_t));
g_snaptest_chunk_count++;
return 0;
}
static void test_snapshot_transfer_two_chunks(void)
{
char tmpdir[] = "/tmp/xcectest_snaptrans_XXXXXX";
TEST_ASSERT_NOT_NULL(mkdtemp(tmpdir));
char snap_path[512];
snprintf(snap_path, sizeof(snap_path), "%s/snap-0000000000000064.capnp", tmpdir);
FILE *f = fopen(snap_path, "wb");
TEST_ASSERT_NOT_NULL(f);
char header[16] = "XCESNAP\0";
uint64_t lsn = 100;
memcpy(header + 8, &lsn, 8);
fwrite(header, 1, 16, f);
char zero[4096];
memset(zero, 0, sizeof(zero));
for (int i = 16; i < 131072; i += 4096)
fwrite(zero, 1, (i + 4096 > 131072) ? (size_t)(131072 - i) : 4096, f);
fclose(f);
extern int (*xce_snapshot_chunk_hook)(endpoint_t *, xce_request_t *);
xce_snapshot_chunk_hook = snaptest_hook;
snaptest_reset();
extern int ha_send_snapshot_to_standby(endpoint_t *, const char *,
uint64_t, uint64_t);
int rc = ha_send_snapshot_to_standby(NULL, tmpdir, lsn, 0);
TEST_ASSERT_EQUAL_INT(0, rc);
TEST_ASSERT_EQUAL_INT(2, g_snaptest_chunk_count);
TEST_ASSERT_EQUAL_UINT64(100, g_snaptest_chunks[0].snapshot_lsn);
TEST_ASSERT_EQUAL_UINT32(0, g_snaptest_chunks[0].chunk_index);
TEST_ASSERT_EQUAL_UINT64(0, g_snaptest_chunks[0].chunk_offset);
TEST_ASSERT_EQUAL_UINT64(131072, g_snaptest_chunks[0].total_size);
TEST_ASSERT_EQUAL_INT(0, g_snaptest_chunks[0].is_last);
TEST_ASSERT_EQUAL_UINT64(131072, g_snaptest_chunks[1].total_size);
TEST_ASSERT_EQUAL_UINT32(1, g_snaptest_chunks[1].chunk_index);
TEST_ASSERT_EQUAL_UINT64(65536, g_snaptest_chunks[1].chunk_offset);
TEST_ASSERT_EQUAL_INT(1, g_snaptest_chunks[1].is_last);
xce_snapshot_chunk_hook = NULL;
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_snapshot_transfer_two_chunks: PASS\n");
}
/* ══════════════════════════════════════════════════════════════════════════
* bug-1475 Finding 2 (coordinator review, 2026-07-27/28): the SAME permanent
* catch-up wedge bug-1475 fixed for WAL-streaming catch-up, reachable
* instead via the SNAPSHOT-INSTALL path (HA_REPL_SEND_SNAPSHOT — dispatched
* whenever a standby has fallen too far behind for incremental streaming, a
* live, common path, not dead code).
*
* ha_snapshot_do_send (ha.c) computes checkpoint_term = persist_entry_term(
* leader, checkpoint_lsn) — which, thanks to bug-1475's TERM_INDEX_UNSET
* fix, is now PERMANENTLY 0 (absent) for any real checkpoint LSN
* (persist_write_checkpoint_marker never records a term for its own entry,
* by design). Before THIS fix, ha_handle_snapshot_chunk's
* persist_reconcile_checkpoint_term(p, checkpoint_lsn, checkpoint_term)
* wrote that 0 RAW into the term index via an EXPLICIT record_entry_term
* call (not a growth-fill) — so entry_term_locked's legacy-0 rule read it
* back as WAL_LEGACY_TERM(1), NOT absent, permanently diverging from the
* leader's own permanently-absent(0) value for the IDENTICAL LSN. A
* subsequent AppendEntries whose prev_log_index==checkpoint_lsn (the entry
* immediately following it) then mismatched logOk (0 != 1) forever.
*
* RED (pre-fix, verified by temporarily reverting persist_reconcile_
* checkpoint_term's TERM_INDEX_UNSET substitution): the receiver's
* checkpoint-boundary term reads back 1 (WAL_LEGACY_TERM), not 0, and the
* subsequent AppendEntries is rejected — applied_lsn never reaches 3.
* GREEN (post-fix): the receiver's checkpoint-boundary term reads back 0
* (absent, matching the leader), and the subsequent AppendEntries is
* accepted.
* ══════════════════════════════════════════════════════════════════════════ */
static cluster_t *g_bug1475f2_recv = NULL;
static int bug1475f2_snapshot_replay_hook(endpoint_t *ep, xce_request_t *req)
{
(void)ep;
if (!req || !req->body.snapshottransfermsg || !g_bug1475f2_recv)
return 0;
snapshot_transfer_t *chunk =
(snapshot_transfer_t *)req->body.snapshottransfermsg;
return ha_handle_snapshot_chunk(&g_bug1475f2_recv->ha,
&g_bug1475f2_recv->persist,
g_bug1475f2_recv->persist.snap_path,
chunk, chunk->raw_payload,
chunk->raw_payload_len);
}
static void test_bug1475_finding2_snapshot_install_checkpoint_term_absent(void)
{
char ltmp[256], rtmp[256];
strcpy(ltmp, "/tmp/xce_cr_b1475f2_leader_XXXXXX");
strcpy(rtmp, "/tmp/xce_cr_b1475f2_recv_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(ltmp));
TEST_ASSERT_NOT_NULL(mkdtemp(rtmp));
cluster_t *leader = t42_make_cluster(ltmp);
cluster_t *recv = t42_make_cluster(rtmp);
TEST_ASSERT_NOT_NULL(leader);
TEST_ASSERT_NOT_NULL(recv);
extern int (*xce_snapshot_chunk_hook)(endpoint_t *, xce_request_t *);
extern int ha_send_snapshot_to_standby(endpoint_t *, const char *,
uint64_t, uint64_t);
enum { TERM = 5 };
t42_make_leader(leader, TERM, /*n_peers=*/3);
t_bug1475_make_follower(recv, TERM, /*n_peers=*/3);
/* ha_handle_snapshot_chunk takes ha->lock directly; t42_make_cluster /
* ha_init_raft never call pthread_mutex_init on it (only the AE-receive
* path is exercised by the OTHER bug-1475 test, which never locks it) —
* initialize it explicitly here rather than relying on a zeroed mutex
* happening to behave like PTHREAD_MUTEX_INITIALIZER. */
pthread_mutex_init(&recv->ha.lock, NULL);
/* Leader: a real entry at lsn=1, then a REAL checkpoint at lsn=2 via
* persist_checkpoint -> persist_write_checkpoint_marker (the exact
* production path — not a synthetic marker).
*
* p->checkpoint_lsn is NOT the WAL_CHECKPOINT entry's own physical lsn —
* persist_checkpoint() (the general/periodic form ha_snapshot_do_send
* actually calls) labels the snapshot with last_applied_lsn, read
* immediately AFTER persist_write_checkpoint_marker has already
* consumed the next lsn slot for the checkpoint itself. In a
* continuously-active system checkpoint_lsn is usually one BELOW the
* checkpoint's own physical lsn (the last real entry applied so far);
* Finding 2 requires the specific (real, reachable) quiescent-state
* timing where the apply pump has already walked all the way through
* and landed exactly ON the checkpoint's own lsn (persist_apply_pump_run
* advances last_applied_lsn one lsn at a time, INCLUDING a no-op pass
* over a WAL_CHECKPOINT slot, before this snapshot-send cycle runs) —
* e.g. right after a config upgrade with no immediate follow-up
* activity. Seed that precondition directly (deterministic; the real
* race depends on independent apply-pump timing this test does not
* need to reproduce) so persist_checkpoint()'s OWN checkpoint_lsn
* coincides with the checkpoint entry's own un-recorded lsn — exactly
* the case where persist_entry_term(checkpoint_lsn) reads genuinely
* absent. */
persist_set_term(&leader->persist, TERM);
TEST_ASSERT_EQUAL_INT(0,
persist_wal_async(&leader->persist, WAL_JOB_UPDATE, NULL, 0)); /* lsn=1 */
TEST_ASSERT_EQUAL_UINT64(2, (uint64_t)leader->persist.current_lsn);
atomic_store_explicit(&leader->persist.last_applied_lsn, 2,
memory_order_release);
TEST_ASSERT_EQUAL_INT(0, persist_checkpoint(&leader->persist)); /* lsn=2 */
TEST_ASSERT_EQUAL_INT(0, persist_flush(&leader->persist));
TEST_ASSERT_EQUAL_UINT64_MESSAGE(2, leader->persist.checkpoint_lsn,
"precondition: checkpoint_lsn must coincide with the checkpoint "
"entry's own physical lsn for this test to exercise Finding 2 "
"(otherwise it would read a real, non-absent term instead)");
/* Leader appends one more real entry AFTER the checkpoint — mirrors the
* real timing that exposed Finding 2 (persist_entry_term(checkpoint_lsn)
* read right after the checkpoint vs. after later growth exists). */
persist_set_term(&leader->persist, TERM);
TEST_ASSERT_EQUAL_INT(0,
persist_wal_async(&leader->persist, WAL_JOB_UPDATE, NULL, 0)); /* lsn=3 */
/* Precondition: exactly what ha_snapshot_do_send's real computation
* would read for the wire — genuinely absent (0), permanently, even
* after later growth (TERM_INDEX_UNSET's whole point). */
uint64_t checkpoint_term =
persist_entry_term(&leader->persist, leader->persist.checkpoint_lsn);
TEST_ASSERT_EQUAL_UINT64_MESSAGE(0, checkpoint_term,
"precondition: a real checkpoint LSN's term reads absent (0) on the "
"sender, even after later entries exist — the exact value "
"ha_snapshot_do_send would put on the wire");
/* Drive the REAL snapshot send -> receive path: ha_send_snapshot_to_standby
* chunks the on-disk snapshot file (written by persist_checkpoint above)
* and stamps checkpoint_term on every chunk; the capture-and-replay hook
* feeds each chunk into the REAL ha_handle_snapshot_chunk on the
* receiver, exactly the wire hop a live transfer performs. */
g_bug1475f2_recv = recv;
xce_snapshot_chunk_hook = bug1475f2_snapshot_replay_hook;
int rc = ha_send_snapshot_to_standby(/*ep=*/NULL, leader->persist.snap_path,
leader->persist.checkpoint_lsn,
checkpoint_term);
xce_snapshot_chunk_hook = NULL;
g_bug1475f2_recv = NULL;
TEST_ASSERT_EQUAL_INT_MESSAGE(0, rc, "ha_send_snapshot_to_standby failed");
TEST_ASSERT_EQUAL_UINT64(leader->persist.checkpoint_lsn,
recv->persist.checkpoint_lsn);
/* The receiver must reconcile the checkpoint boundary LSN's term to
* match the leader's — genuinely absent (0), NOT WAL_LEGACY_TERM(1). */
TEST_ASSERT_EQUAL_UINT64_MESSAGE(0,
persist_entry_term(&recv->persist, leader->persist.checkpoint_lsn),
"bug-1475 Finding 2: the receiver's checkpoint-boundary term must "
"reconcile to absent (0), matching the leader's permanently-absent "
"value for the SAME lsn — NOT get reinterpreted as "
"WAL_LEGACY_TERM(1) by persist_reconcile_checkpoint_term's "
"record_entry_term(..., 0) call");
/* Isolate Finding 2's term-index concern from two OTHER, SEPARATE,
* pre-existing (unchanged by this fix) mechanics this test is not about:
*
* 1. ha_handle_snapshot_chunk does not itself resync ha->raft.log_len
* (only ha_apply_term_entry_via_library's JIT resync does, on the
* NEXT AE) — set it directly to the checkpoint's own lsn here, the
* value a real deployment reaches once durable_lsn catches up (or a
* later boot-reseed runs).
* 2. load_snapshot() sets p->current_lsn = stored_lsn (the checkpoint's
* OWN lsn), NOT stored_lsn + 1 — confirmed via direct instrumentation
* (current_lsn read back as 2, matching checkpoint_lsn, immediately
* after this install). persist_wal_write_replicated's forward-gap
* guard (lsn > current_lsn -> EAGAIN) would then reject ANY entry at
* checkpoint_lsn+1 regardless of term, confounding this test's
* specific term question. Whether that current_lsn convention
* correctly bridges into the next live catch-up cycle in production
* is a DIFFERENT, pre-existing question this test does not answer —
* flagged here, not fixed (out of Finding 2's scope: the coordinator's
* review identified a term(0-vs-1) mismatch specifically, not a
* current_lsn contiguity gap). Bypass it directly so only the term
* question is under test. */
recv->ha.raft.log_len = leader->persist.checkpoint_lsn;
recv->persist.current_lsn = leader->persist.checkpoint_lsn + 1;
/* Drive a REAL subsequent AppendEntries whose prev_log_index is the
* checkpoint's own LSN — the entry immediately following it. */
wal_catchup_entry_t sub;
memset(&sub, 0, sizeof(sub));
sub.lsn = 3;
sub.entry_type = WAL_JOB_UPDATE;
sub.term = TERM;
sub.prev_log_index = leader->persist.checkpoint_lsn; /* == 2 */
sub.prev_log_term = checkpoint_term; /* == 0, absent */
sub.leader_current_term = TERM;
wal_catchup_entry_t *sub_arr[1] = { &sub };
wal_catchup_entry_t batch;
memset(&batch, 0, sizeof(batch));
batch.n_entries = 1;
batch.entries = sub_arr;
batch.term = TERM;
batch.prev_log_index = sub.prev_log_index;
batch.prev_log_term = sub.prev_log_term;
rc = ha_apply_wal_catchup_entry(&recv->ha, &recv->persist, &batch,
/*ep*/NULL, recv);
TEST_ASSERT_EQUAL_INT(0, rc);
TEST_ASSERT_EQUAL_UINT64_MESSAGE(3,
atomic_load_explicit(&recv->ha.applied_lsn, memory_order_acquire),
"bug-1475 Finding 2: the standby must accept the AppendEntries "
"immediately following the checkpoint boundary after a snapshot "
"install, not permanently reject it (ae_reject_logmismatch) due to "
"a term(0) vs term(1) mismatch at the checkpoint LSN");
TEST_ASSERT_EQUAL_UINT64(TERM, persist_entry_term(&recv->persist, 3));
pthread_mutex_destroy(&recv->ha.lock);
t42_teardown(leader);
t42_teardown(recv);
printf("test_bug1475_finding2_snapshot_install_checkpoint_term_absent: PASS\n");
}
static void test_snapshot_transfer_small_less_than_one_chunk(void)
{
char tmpdir[] = "/tmp/xcectest_snaptrans_XXXXXX";
TEST_ASSERT_NOT_NULL(mkdtemp(tmpdir));
char snap_path[512];
snprintf(snap_path, sizeof(snap_path), "%s/snap-000000000000000a.capnp", tmpdir);
FILE *f = fopen(snap_path, "wb");
TEST_ASSERT_NOT_NULL(f);
char buf[64];
memset(buf, 0, sizeof(buf));
memcpy(buf, "XCESNAP\0", 8);
uint64_t lsn = 10;
memcpy(buf + 8, &lsn, 8);
fwrite(buf, 1, sizeof(buf), f);
fclose(f);
extern int (*xce_snapshot_chunk_hook)(endpoint_t *, xce_request_t *);
xce_snapshot_chunk_hook = snaptest_hook;
snaptest_reset();
extern int ha_send_snapshot_to_standby(endpoint_t *, const char *,
uint64_t, uint64_t);
int rc = ha_send_snapshot_to_standby(NULL, tmpdir, lsn, 0);
TEST_ASSERT_EQUAL_INT(0, rc);
TEST_ASSERT_EQUAL_INT(1, g_snaptest_chunk_count);
TEST_ASSERT_EQUAL_UINT64(10, g_snaptest_chunks[0].snapshot_lsn);
TEST_ASSERT_EQUAL_UINT32(0, g_snaptest_chunks[0].chunk_index);
TEST_ASSERT_EQUAL_UINT64(64, g_snaptest_chunks[0].total_size);
TEST_ASSERT_EQUAL_INT(1, g_snaptest_chunks[0].is_last);
xce_snapshot_chunk_hook = NULL;
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_snapshot_transfer_small_less_than_one_chunk: PASS\n");
}
/* bug-1386: a chunk send that fails mid-transfer (e.g. -ECONNRESET while the
* standby endpoint is mid-teardown/reconnect) must stop the loop and be
* propagated, not be silently swallowed while the function still reports
* "transfer complete". */
static int g_snaptest_fail_after_calls = -1; /* -1 = never fail */
static int snaptest_fail_after_hook(endpoint_t *ep, xce_request_t *req)
{
(void)ep;
if (g_snaptest_chunk_count >= 16) return -1;
memcpy(&g_snaptest_chunks[g_snaptest_chunk_count],
req->body.snapshottransfermsg, sizeof(snapshot_transfer_t));
g_snaptest_chunk_count++;
if (g_snaptest_fail_after_calls >= 0 &&
g_snaptest_chunk_count > g_snaptest_fail_after_calls)
return -ECONNRESET;
return 0;
}
static void test_snapshot_transfer_stops_and_propagates_send_failure(void)
{
char tmpdir[] = "/tmp/xcectest_snaptrans_XXXXXX";
TEST_ASSERT_NOT_NULL(mkdtemp(tmpdir));
/* 3 chunks: 2 full 64KB chunks + a partial third, so a mid-stream
* failure on chunk 1 leaves chunk 2 (the would-be is_last chunk)
* unsent. */
char snap_path[512];
snprintf(snap_path, sizeof(snap_path), "%s/snap-00000000000000c8.capnp", tmpdir);
FILE *f = fopen(snap_path, "wb");
TEST_ASSERT_NOT_NULL(f);
char header[16] = "XCESNAP\0";
uint64_t lsn = 200;
memcpy(header + 8, &lsn, 8);
fwrite(header, 1, 16, f);
char zero[4096];
memset(zero, 0, sizeof(zero));
size_t total = 65536 + 65536 + 4096;
for (size_t i = 16; i < total; i += 4096)
fwrite(zero, 1, (i + 4096 > total) ? (total - i) : 4096, f);
fclose(f);
extern int (*xce_snapshot_chunk_hook)(endpoint_t *, xce_request_t *);
xce_snapshot_chunk_hook = snaptest_fail_after_hook;
snaptest_reset();
g_snaptest_fail_after_calls = 1; /* chunk_index 0 succeeds, chunk_index 1 fails */
extern int ha_send_snapshot_to_standby(endpoint_t *, const char *,
uint64_t, uint64_t);
int rc = ha_send_snapshot_to_standby(NULL, tmpdir, lsn, 0);
TEST_ASSERT_EQUAL_INT(-ECONNRESET, rc);
/* Loop must stop right after the failing chunk — chunk_index 2 (the
* is_last chunk) must never be attempted. */
TEST_ASSERT_EQUAL_INT(2, g_snaptest_chunk_count);
TEST_ASSERT_EQUAL_INT(0, g_snaptest_chunks[1].is_last);
xce_snapshot_chunk_hook = NULL;
g_snaptest_fail_after_calls = -1;
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_snapshot_transfer_stops_and_propagates_send_failure: PASS\n");
}
/* ── Task 3.5c: Standby snapshot receive handler ──────────────────────────── */
/* Helper: initialise a minimal ha_state_t for snapshot receive tests */
static void snap_recv_ha_init(ha_state_t *ha)
{
memset(ha, 0, sizeof(*ha));
ha_config_t cfg;
memset(&cfg, 0, sizeof(cfg));
cfg.heartbeat_timeout_ms = 10000;
cfg.election_timeout_ms = 1500;
ha_init(ha, &cfg, 0);
}
/* Helper: write a minimal valid snapshot file to path (XCESNAP header + body) */
static void write_test_snapshot(const char *path, uint64_t lsn, size_t body_size)
{
FILE *f = fopen(path, "wb");
TEST_ASSERT_NOT_NULL_MESSAGE(f, "Failed to create test snapshot file");
char header[16];
memcpy(header, "XCESNAP\0", 8);
memcpy(header + 8, &lsn, 8);
fwrite(header, 1, 16, f);
if (body_size > 16) {
char *zeros = calloc(1, body_size - 16);
fwrite(zeros, 1, body_size - 16, f);
free(zeros);
}
fclose(f);
}
/* Test 3.5c-A: receive 2 chunks, verify snap.part assembled and renamed correctly,
* applied_lsn set to checkpoint_lsn.
* Requirements: 4.2, 4.3 */
static void test_snapshot_recv_two_chunks_assembles_and_renames(void)
{
char tmpdir[] = "/tmp/xcectest_snaprecv_XXXXXX";
TEST_ASSERT_NOT_NULL(mkdtemp(tmpdir));
/* Create snap_dir subdirectory (matches persist->snap_path layout) */
char snap_dir[512];
snprintf(snap_dir, sizeof(snap_dir), "%s/snap", tmpdir);
TEST_ASSERT_EQUAL_INT(0, mkdir(snap_dir, 0700));
/* Build a fake 128-byte snapshot body (two 64-byte chunks).
* payload_bytes contains the raw file bytes for each chunk.
* We skip writing an actual snapshot source file — the receiver
* writes snap.part and renames it; we use the resulting file to verify.
*
* The body must be a WELL-FORMED entity-bearing checkpoint, not opaque
* filler (ha-entity-snapshots task 5.2): load_snapshot() now actually
* parses everything past the legacy header — a 0xAA/0xBB filler tail
* used to be silently ignored (load_snapshot only ever read the 57-byte
* header) but is now correctly rejected as an unrecognized
* format_version. Layout (design.md "Checkpoint File Layout"): the
* 57-byte legacy header (cfgref_present=0 at byte 16, so bytes 17-56 are
* unread and left zero) + format_version=2 + job_count=0 + queue_count=0
* (69 bytes total), padded with zero filler out to 128 bytes to keep the
* two-64-byte-chunk shape this test exercises — the padding is never
* read (load_snapshot_entities stops right after the queue_count=0
* loop), so its content is immaterial. */
uint64_t snap_lsn = 100;
size_t total_size = 128;
uint8_t body[128];
memset(body, 0, sizeof(body));
memcpy(body, "XCESNAP\0", 8);
memcpy(body + 8, &snap_lsn, 8);
/* body[16] (cfgref_present) left 0 by the memset above. */
uint32_t fake_fmt = 2u; /* must match persist.c's SNAPSHOT_FORMAT_VERSION
* (config-upgrade-snapshot task 1 bumped 1->2) */
uint32_t fake_job_count = 0u;
uint32_t fake_queue_count = 0u;
memcpy(body + 57, &fake_fmt, sizeof(fake_fmt));
memcpy(body + 61, &fake_job_count, sizeof(fake_job_count));
memcpy(body + 65, &fake_queue_count, sizeof(fake_queue_count));
uint8_t chunk0[64];
uint8_t chunk1[64];
memcpy(chunk0, body, 64);
memcpy(chunk1, body + 64, 64);
persist_t *p = calloc(1, sizeof(persist_t));
TEST_ASSERT_NOT_NULL(p);
persist_config_t pcfg = persist_config_defaults();
persist_set_workdir(p, tmpdir, "ctrl-snaprecv");
persist_init(p, &pcfg, NULL);
persist_start(p);
ha_state_t ha;
snap_recv_ha_init(&ha);
/* Chunk 0 */
snapshot_transfer_t c0;
memset(&c0, 0, sizeof(c0));
c0.snapshot_lsn = snap_lsn;
c0.chunk_index = 0;
c0.chunk_offset = 0;
c0.total_size = (uint64_t)total_size;
c0.is_last = 0;
int rc = ha_handle_snapshot_chunk(&ha, p, snap_dir, &c0, chunk0, 64);
TEST_ASSERT_EQUAL_INT(0, rc);
/* snap.part must exist after first chunk */
char part_path[600];
snprintf(part_path, sizeof(part_path), "%s/snap.part", snap_dir);
struct stat st;
TEST_ASSERT_EQUAL_INT_MESSAGE(0, stat(part_path, &st),
"snap.part should exist after chunk 0");
TEST_ASSERT_EQUAL_UINT64(64, (uint64_t)st.st_size);
/* Chunk 1 (isLast=true) */
snapshot_transfer_t c1;
memset(&c1, 0, sizeof(c1));
c1.snapshot_lsn = snap_lsn;
c1.chunk_index = 1;
c1.chunk_offset = 64;
c1.total_size = (uint64_t)total_size;
c1.is_last = 1;
rc = ha_handle_snapshot_chunk(&ha, p, snap_dir, &c1, chunk1, 64);
TEST_ASSERT_EQUAL_INT(0, rc);
/* snap.part must be gone (renamed) */
TEST_ASSERT_NOT_EQUAL_MESSAGE(0, stat(part_path, &st),
"snap.part should be gone after isLast");
/* Final file snap-{lsn:016x}.bin must exist */
char final_path[600];
snprintf(final_path, sizeof(final_path),
"%s/snap-%016" PRIx64 ".bin", snap_dir, snap_lsn);
TEST_ASSERT_EQUAL_INT_MESSAGE(0, stat(final_path, &st),
"snap-{lsn}.bin should exist after isLast");
TEST_ASSERT_EQUAL_UINT64((uint64_t)total_size, (uint64_t)st.st_size);
/* applied_lsn must be set to checkpoint_lsn (= snap_lsn = 100) */
uint64_t got_lsn = (uint64_t)atomic_load_explicit(&ha.applied_lsn,
memory_order_acquire);
TEST_ASSERT_EQUAL_UINT64(snap_lsn, got_lsn);
ha_fini(&ha);
persist_stop(p);
persist_fini(p);
free(p);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_snapshot_recv_two_chunks_assembles_and_renames: PASS\n");
}
/* config-upgrade-snapshot task 1 (Req 1.9, 5.7): SNAPSHOT_FORMAT_VERSION was
* bumped 1->2 to reserve the version for the HostAdminState/QueueAdminState
* capnp migration of the host/queue admin-state frames. A checkpoint written
* under the PRIOR format_version (1 -- the raw queue-frame layout this spec
* migrates off of) must be hard-rejected fail-loud by a binary built against
* the bumped SNAPSHOT_FORMAT_VERSION=2, never silently reinterpreted (Design
* Invariant 4; persist.c:2541's existing `fmt != SNAPSHOT_FORMAT_VERSION`
* check, unchanged logic, new constant). Same well-formed-except-for-
* format-version fixture shape as
* test_snapshot_recv_two_chunks_assembles_and_renames above, but the
* embedded format_version is pinned to the literal PRIOR value (1)
* regardless of whatever persist.c's SNAPSHOT_FORMAT_VERSION currently is —
* this is exactly the "old on-disk checkpoint, new binary" skew the version
* bump must reject. */
static void test_snapshot_recv_old_format_version_rejected_fail_loud(void)
{
char tmpdir[] = "/tmp/xcectest_snaprecv_oldfmt_XXXXXX";
TEST_ASSERT_NOT_NULL(mkdtemp(tmpdir));
char snap_dir[512];
snprintf(snap_dir, sizeof(snap_dir), "%s/snap", tmpdir);
TEST_ASSERT_EQUAL_INT(0, mkdir(snap_dir, 0700));
uint64_t snap_lsn = 200;
size_t total_size = 128;
uint8_t body[128];
memset(body, 0, sizeof(body));
memcpy(body, "XCESNAP\0", 8);
memcpy(body + 8, &snap_lsn, 8);
/* body[16] (cfgref_present) left 0 by the memset above. */
uint32_t old_fmt = 1u; /* the pre-migration raw queue-frame layout --
* deliberately NOT persist.c's current
* SNAPSHOT_FORMAT_VERSION */
uint32_t fake_job_count = 0u;
uint32_t fake_queue_count = 0u;
memcpy(body + 57, &old_fmt, sizeof(old_fmt));
memcpy(body + 61, &fake_job_count, sizeof(fake_job_count));
memcpy(body + 65, &fake_queue_count, sizeof(fake_queue_count));
uint8_t chunk0[64];
uint8_t chunk1[64];
memcpy(chunk0, body, 64);
memcpy(chunk1, body + 64, 64);
persist_t *p = calloc(1, sizeof(persist_t));
TEST_ASSERT_NOT_NULL(p);
persist_config_t pcfg = persist_config_defaults();
persist_set_workdir(p, tmpdir, "ctrl-snaprecv-oldfmt");
persist_init(p, &pcfg, NULL);
persist_start(p);
ha_state_t ha;
snap_recv_ha_init(&ha);
/* Chunk 0 — assembling snap.part never itself parses the body, so this
* must still succeed regardless of what format_version the bytes carry. */
snapshot_transfer_t c0;
memset(&c0, 0, sizeof(c0));
c0.snapshot_lsn = snap_lsn;
c0.chunk_index = 0;
c0.chunk_offset = 0;
c0.total_size = (uint64_t)total_size;
c0.is_last = 0;
int rc = ha_handle_snapshot_chunk(&ha, p, snap_dir, &c0, chunk0, 64);
TEST_ASSERT_EQUAL_INT_MESSAGE(0, rc, "assembling a chunk never parses the body");
/* Chunk 1 (isLast=true) triggers rename + persist_load_snapshot — this is
* where the format-version check fires and must fail loud. */
snapshot_transfer_t c1;
memset(&c1, 0, sizeof(c1));
c1.snapshot_lsn = snap_lsn;
c1.chunk_index = 1;
c1.chunk_offset = 64;
c1.total_size = (uint64_t)total_size;
c1.is_last = 1;
rc = ha_handle_snapshot_chunk(&ha, p, snap_dir, &c1, chunk1, 64);
TEST_ASSERT_TRUE_MESSAGE(rc != 0,
"a checkpoint encoded under the prior SNAPSHOT_FORMAT_VERSION must be "
"rejected fail-loud by a binary built against the bumped version, "
"never silently reinterpreted (Requirement 5.7)");
/* A rejected load must never advance applied_lsn (no partial/silent
* acceptance of mismatched-format bytes). */
uint64_t got_lsn = (uint64_t)atomic_load_explicit(&ha.applied_lsn,
memory_order_acquire);
TEST_ASSERT_EQUAL_UINT64_MESSAGE(0, got_lsn,
"a rejected format-mismatched checkpoint must never advance applied_lsn");
ha_fini(&ha);
persist_stop(p);
persist_fini(p);
free(p);
char cmd2[512];
snprintf(cmd2, sizeof(cmd2), "rm -rf %s", tmpdir);
system(cmd2);
printf("test_snapshot_recv_old_format_version_rejected_fail_loud: PASS\n");
}
/* Test 6.1: a legacy (pre-ha-entity-snapshots) position-only snapshot —
* exactly the 16-byte XCESNAP magic+lsn header, no entity payload — driven
* through the real receive handler end-to-end. persist_load_snapshot's
* entities_restored out-param comes back false (design.md "Checkpoint File
* Layout": "does more data exist" is the legacy discriminator), and
* ha_handle_snapshot_chunk must still: (a) return rc==0 (a legacy file is
* not a failure, Requirement 2.4/5.1/5.2), and (b) advance ha->applied_lsn
* exactly as it does for an entity-bearing file (Requirement 4.1/4.2 —
* the applied_lsn gating is unchanged by task 6.1; only a new informational
* log line is added on this path).
* Requirements: 2.4, 4.1, 4.2, 5.1, 5.2 */
static void test_snapshot_recv_legacy_file_advances_without_entities(void)
{
char tmpdir[] = "/tmp/xcectest_snaprecv_legacy_XXXXXX";
TEST_ASSERT_NOT_NULL(mkdtemp(tmpdir));
char snap_dir[512];
snprintf(snap_dir, sizeof(snap_dir), "%s/snap", tmpdir);
TEST_ASSERT_EQUAL_INT(0, mkdir(snap_dir, 0700));
/* Legacy body: magic(8) + checkpoint_lsn(8), nothing else — the file
* ends exactly at the legacy header, so load_snapshot's "does more data
* exist" discriminator reports this as legacy (entities_restored=false)
* rather than corrupt or entity-bearing. */
uint64_t snap_lsn = 300;
uint8_t body[16];
memcpy(body, "XCESNAP\0", 8);
memcpy(body + 8, &snap_lsn, 8);
persist_t *p = calloc(1, sizeof(persist_t));
TEST_ASSERT_NOT_NULL(p);
persist_config_t pcfg = persist_config_defaults();
persist_set_workdir(p, tmpdir, "ctrl-snaprecv-legacy");
persist_init(p, &pcfg, NULL);
persist_start(p);
ha_state_t ha;
snap_recv_ha_init(&ha);
snapshot_transfer_t c0;
memset(&c0, 0, sizeof(c0));
c0.snapshot_lsn = snap_lsn;
c0.chunk_index = 0;
c0.chunk_offset = 0;
c0.total_size = sizeof(body);
c0.is_last = 1;
int rc = ha_handle_snapshot_chunk(&ha, p, snap_dir, &c0, body, sizeof(body));
TEST_ASSERT_EQUAL_INT_MESSAGE(0, rc,
"a legacy position-only checkpoint must not be treated as a failure");
/* Final file must exist (rename still happens on the legacy path) */
char final_path[600];
snprintf(final_path, sizeof(final_path),
"%s/snap-%016" PRIx64 ".bin", snap_dir, snap_lsn);
struct stat st;
TEST_ASSERT_EQUAL_INT_MESSAGE(0, stat(final_path, &st),
"snap-{lsn}.bin should exist after isLast");
/* applied_lsn advances to the legacy file's recorded position — same
* rc-gates-applied_lsn ordering as the entity-bearing path, unchanged by
* task 6.1 (Requirement 4.1, 4.2). */
uint64_t got_lsn = (uint64_t)atomic_load_explicit(&ha.applied_lsn,
memory_order_acquire);
TEST_ASSERT_EQUAL_UINT64(snap_lsn, got_lsn);
ha_fini(&ha);
persist_stop(p);
persist_fini(p);
free(p);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_snapshot_recv_legacy_file_advances_without_entities: PASS\n");
}
/* Test 3.5c-B: size mismatch on isLast returns error (verify size == total_size).
* Requirements: 4.3 */
static void test_snapshot_recv_size_mismatch_fails(void)
{
char tmpdir[] = "/tmp/xcectest_snaprecv2_XXXXXX";
TEST_ASSERT_NOT_NULL(mkdtemp(tmpdir));
char snap_dir[512];
snprintf(snap_dir, sizeof(snap_dir), "%s/snap", tmpdir);
TEST_ASSERT_EQUAL_INT(0, mkdir(snap_dir, 0700));
persist_t *p = calloc(1, sizeof(persist_t));
TEST_ASSERT_NOT_NULL(p);
persist_config_t pcfg = persist_config_defaults();
persist_set_workdir(p, tmpdir, "ctrl-snaprecv2");
persist_init(p, &pcfg, NULL);
persist_start(p);
ha_state_t ha;
snap_recv_ha_init(&ha);
uint64_t snap_lsn = 200;
uint8_t chunk0[64];
memset(chunk0, 0xCC, 64);
/* Claim total_size=200 but only send 64 bytes with is_last=true */
snapshot_transfer_t c0;
memset(&c0, 0, sizeof(c0));
c0.snapshot_lsn = snap_lsn;
c0.chunk_index = 0;
c0.chunk_offset = 0;
c0.total_size = 200; /* mismatch — only 64 bytes will be written */
c0.is_last = 1;
int rc = ha_handle_snapshot_chunk(&ha, p, snap_dir, &c0, chunk0, 64);
/* Must fail — size mismatch */
TEST_ASSERT_NOT_EQUAL_MESSAGE(0, rc, "size mismatch must return error");
/* applied_lsn must remain 0 (not advanced on failure) */
uint64_t got_lsn = (uint64_t)atomic_load_explicit(&ha.applied_lsn,
memory_order_acquire);
TEST_ASSERT_EQUAL_UINT64(0, got_lsn);
ha_fini(&ha);
persist_stop(p);
persist_fini(p);
free(p);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_snapshot_recv_size_mismatch_fails: PASS\n");
}
/* Test 3.5c-C: NULL snap_dir or NULL chunk returns error gracefully */
static void test_snapshot_recv_null_args_fail(void)
{
ha_state_t ha;
snap_recv_ha_init(&ha);
int rc = ha_handle_snapshot_chunk(&ha, NULL, NULL, NULL, NULL, 0);
TEST_ASSERT_NOT_EQUAL(0, rc);
ha_fini(&ha);
printf("test_snapshot_recv_null_args_fail: PASS\n");
}
/* Test 6.4-A: 128KB snapshot in 2 equal chunks (65536 bytes each) — standby
* receives both chunks, verifies total_size matches, snap.part is atomically
* renamed to snap-{lsn}.bin, persist_load_snapshot is called successfully,
* and applied_lsn equals the checkpoint_lsn embedded in the snapshot.
*
* This is the primary task-6.4 coverage test for Req 4.2, 4.3.
* Uses the same 65536-byte chunk size as the sender test
* (test_snapshot_transfer_two_chunks) to exercise the full receive path. */
static void test_snapshot_recv_128kb_two_chunks(void)
{
char tmpdir[] = "/tmp/xcectest_snap128kb_XXXXXX";
TEST_ASSERT_NOT_NULL(mkdtemp(tmpdir));
char snap_dir[512];
snprintf(snap_dir, sizeof(snap_dir), "%s/snap", tmpdir);
TEST_ASSERT_EQUAL_INT(0, mkdir(snap_dir, 0700));
persist_t *p = calloc(1, sizeof(persist_t));
TEST_ASSERT_NOT_NULL(p);
persist_config_t pcfg = persist_config_defaults();
persist_set_workdir(p, tmpdir, "ctrl-snap128kb");
persist_init(p, &pcfg, NULL);
persist_start(p);
ha_state_t ha;
snap_recv_ha_init(&ha);
/* 128KB snapshot split into two 65536-byte chunks */
const uint64_t snap_lsn = 0x64; /* LSN 100 — matches sender test */
const size_t chunk_size = 65536;
const size_t total_size = 131072; /* 128 * 1024 */
/* Allocate and zero-fill chunks */
uint8_t *chunk0 = calloc(1, chunk_size);
uint8_t *chunk1 = calloc(1, chunk_size);
TEST_ASSERT_NOT_NULL(chunk0);
TEST_ASSERT_NOT_NULL(chunk1);
/* Embed valid XCESNAP header in chunk0 so persist_load_snapshot succeeds.
* chunk0/chunk1 are otherwise zero-filled, but a well-formed entity-
* bearing checkpoint (ha-entity-snapshots task 5.2) needs format_version
* = SNAPSHOT_FORMAT_VERSION right after the 57-byte legacy header, or
* load_snapshot() correctly rejects an all-zero format_version as
* unrecognized rather than silently ignoring the body as before. The
* job_count=0/queue_count=0 that follow are already satisfied by the
* zero-fill; the rest of the 128KB body is never read (load_snapshot
* stops right after the queue_count=0 loop) so it stays harmless
* filler. */
memcpy(chunk0, "XCESNAP\0", 8);
memcpy(chunk0 + 8, &snap_lsn, 8);
/* chunk0[16] (cfgref_present) already 0 from calloc. */
const uint32_t fake_fmt = 2u; /* must match persist.c's SNAPSHOT_FORMAT_VERSION
* (config-upgrade-snapshot task 1 bumped 1->2) */
memcpy(chunk0 + 57, &fake_fmt, sizeof(fake_fmt));
/* ── Chunk 0: not last ── */
snapshot_transfer_t c0;
memset(&c0, 0, sizeof(c0));
c0.snapshot_lsn = snap_lsn;
c0.chunk_index = 0;
c0.chunk_offset = 0;
c0.total_size = (uint64_t)total_size;
c0.is_last = 0;
int rc = ha_handle_snapshot_chunk(&ha, p, snap_dir, &c0, chunk0, chunk_size);
TEST_ASSERT_EQUAL_INT_MESSAGE(0, rc, "chunk 0 must succeed");
/* snap.part must exist and be exactly chunk_size bytes */
char part_path[600];
snprintf(part_path, sizeof(part_path), "%s/snap.part", snap_dir);
struct stat st;
TEST_ASSERT_EQUAL_INT_MESSAGE(0, stat(part_path, &st),
"snap.part must exist after chunk 0");
TEST_ASSERT_EQUAL_UINT64_MESSAGE((uint64_t)chunk_size, (uint64_t)st.st_size,
"snap.part must be chunk_size bytes after chunk 0");
/* ── Chunk 1: isLast=true ── */
snapshot_transfer_t c1;
memset(&c1, 0, sizeof(c1));
c1.snapshot_lsn = snap_lsn;
c1.chunk_index = 1;
c1.chunk_offset = (uint64_t)chunk_size;
c1.total_size = (uint64_t)total_size;
c1.is_last = 1;
rc = ha_handle_snapshot_chunk(&ha, p, snap_dir, &c1, chunk1, chunk_size);
TEST_ASSERT_EQUAL_INT_MESSAGE(0, rc, "chunk 1 (isLast) must succeed");
/* snap.part must be gone (atomically renamed) */
TEST_ASSERT_NOT_EQUAL_MESSAGE(0, stat(part_path, &st),
"snap.part must be gone after isLast rename");
/* Final file snap-{lsn:016x}.bin must exist with total_size bytes */
char final_path[600];
snprintf(final_path, sizeof(final_path),
"%s/snap-%016" PRIx64 ".bin", snap_dir, snap_lsn);
TEST_ASSERT_EQUAL_INT_MESSAGE(0, stat(final_path, &st),
"snap-{lsn}.bin must exist after isLast");
TEST_ASSERT_EQUAL_UINT64_MESSAGE((uint64_t)total_size, (uint64_t)st.st_size,
"snap-{lsn}.bin must be exactly total_size bytes");
/* applied_lsn must equal checkpoint_lsn (snap_lsn) after successful load */
uint64_t got_lsn = (uint64_t)atomic_load_explicit(&ha.applied_lsn,
memory_order_acquire);
TEST_ASSERT_EQUAL_UINT64_MESSAGE(snap_lsn, got_lsn,
"applied_lsn must equal checkpoint_lsn after load");
free(chunk0);
free(chunk1);
ha_fini(&ha);
persist_stop(p);
persist_fini(p);
free(p);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_snapshot_recv_128kb_two_chunks: PASS\n");
}
/* bug-1389: a live --force-snapshot soak observed the vtask pool dispatching
* a 12-chunk transfer's chunks out of chunk_index order — chunk 2 was
* processed AFTER chunks 3 and 4 (arrival order 0,1,3,4,2,5,6,7,8,9,10,11).
* Live crc32 instrumentation proved every chunk's CONTENT survived the wire
* intact; the bug was that ha_handle_snapshot_chunk appended bytes in
* ARRIVAL order (fopen "ab") instead of writing each chunk at its own
* chunk_offset, so chunks 2/3/4 landed at the wrong file positions —
* same total size, wrong content, exactly matching the corruption the soak
* saw. This test replays that exact arrival order and asserts the
* assembled file is byte-identical to the correctly-ordered source,
* regardless of the order ha_handle_snapshot_chunk was called in. */
static void test_snapshot_recv_out_of_order_chunks_assemble_correctly(void)
{
char tmpdir[] = "/tmp/xcectest_snaprecv3_XXXXXX";
TEST_ASSERT_NOT_NULL(mkdtemp(tmpdir));
char snap_dir[512];
snprintf(snap_dir, sizeof(snap_dir), "%s/snap", tmpdir);
TEST_ASSERT_EQUAL_INT(0, mkdir(snap_dir, 0700));
/* 4 chunks of 64 bytes each = 256-byte body. Must be a WELL-FORMED
* entity-bearing checkpoint (same reason as
* test_snapshot_recv_two_chunks_assembles_and_renames above): legacy
* 57-byte header (cfgref_present=0) + format_version=2 + job_count=0 +
* queue_count=0 + host_count=0 (config-upgrade-snapshot task 4 --
* load_snapshot_entities now reads a host section after the queue
* section, so it must likewise be pinned to a well-formed 0 here rather
* than left as position-dependent filler), then filler out to 256
* bytes. The filler is position-dependent (distinct per source byte,
* not per chunk) so ANY chunk landing at the wrong file offset is
* immediately detectable via a whole-buffer memcmp, regardless of
* which physical chunk a given structural field happens to fall in --
* except for the 4 structural-field byte ranges explicitly overlaid
* below (fmt/job_count/queue_count/host_count), which must stay
* well-formed for the load to succeed at all. */
uint64_t snap_lsn = 400;
size_t total_size = 256;
uint8_t body[256];
memset(body, 0, sizeof(body));
memcpy(body, "XCESNAP\0", 8);
memcpy(body + 8, &snap_lsn, 8);
for (int i = 16; i < 256; i++)
body[i] = (uint8_t)(i * 3 + 7); /* position-dependent, non-repeating */
uint32_t fake_fmt = 2u; /* must match persist.c's SNAPSHOT_FORMAT_VERSION
* (config-upgrade-snapshot task 1 bumped 1->2) */
uint32_t fake_job_count = 0u;
uint32_t fake_queue_count = 0u;
uint32_t fake_host_count = 0u;
memcpy(body + 57, &fake_fmt, sizeof(fake_fmt));
memcpy(body + 61, &fake_job_count, sizeof(fake_job_count));
memcpy(body + 65, &fake_queue_count, sizeof(fake_queue_count));
memcpy(body + 69, &fake_host_count, sizeof(fake_host_count));
persist_t *p = calloc(1, sizeof(persist_t));
TEST_ASSERT_NOT_NULL(p);
persist_config_t pcfg = persist_config_defaults();
persist_set_workdir(p, tmpdir, "ctrl-snaprecv3");
persist_init(p, &pcfg, NULL);
persist_start(p);
ha_state_t ha;
snap_recv_ha_init(&ha);
/* Deliver out of chunk_index order: 0, 2, 1, 3 (isLast). */
int order[4] = { 0, 2, 1, 3 };
for (int oi = 0; oi < 4; oi++) {
int idx = order[oi];
snapshot_transfer_t c;
memset(&c, 0, sizeof(c));
c.snapshot_lsn = snap_lsn;
c.chunk_index = (uint32_t)idx;
c.chunk_offset = (uint64_t)(idx * 64);
c.total_size = (uint64_t)total_size;
c.is_last = (idx == 3);
int rc = ha_handle_snapshot_chunk(&ha, p, snap_dir, &c, body + idx * 64, 64);
TEST_ASSERT_EQUAL_INT(0, rc);
}
/* Final file must exist (finalize triggers once all 4 chunks are in,
* regardless of the delivery order above) and be byte-identical to the
* correctly-ordered source body — proves each chunk landed at its own
* chunk_offset, not at the position it happened to arrive in. */
char final_path[600];
snprintf(final_path, sizeof(final_path),
"%s/snap-%016" PRIx64 ".bin", snap_dir, snap_lsn);
struct stat st;
TEST_ASSERT_EQUAL_INT_MESSAGE(0, stat(final_path, &st),
"snap-{lsn}.bin should exist once all "
"chunks are in, regardless of arrival order");
TEST_ASSERT_EQUAL_UINT64((uint64_t)total_size, (uint64_t)st.st_size);
FILE *f = fopen(final_path, "rb");
TEST_ASSERT_NOT_NULL(f);
uint8_t got[256];
TEST_ASSERT_EQUAL_size_t(256, fread(got, 1, 256, f));
fclose(f);
TEST_ASSERT_EQUAL_MEMORY_MESSAGE(body, got, 256,
"assembled file must be byte-identical to the source despite "
"out-of-chunk_index-order delivery (bug-1389)");
uint64_t got_lsn = (uint64_t)atomic_load_explicit(&ha.applied_lsn,
memory_order_acquire);
TEST_ASSERT_EQUAL_UINT64(snap_lsn, got_lsn);
ha_fini(&ha);
persist_stop(p);
persist_fini(p);
free(p);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_snapshot_recv_out_of_order_chunks_assemble_correctly: PASS\n");
}
/* Test 3.5d: reconnected standby discards snap.part and restarts from chunk 0.
*
* Design §Snapshot Transfer: "Mid-transfer reconnect always restarts snapshot
* from chunk 0 — the standby discards its partial snap.part file on reconnect."
* The discard (unlink) is done by the ctrlhello handler before the first chunk
* of a new transfer arrives. This test verifies that:
* 1. After receiving chunk 0 (creating snap.part), if the caller unlinks
* snap.part (simulating reconnect/reset) and then calls ha_handle_snapshot_chunk
* again with chunk_index=0, the function creates a fresh snap.part
* (not appending to a previous stale file).
* 2. The resulting snap.part contains only the new chunk's bytes (not a
* concatenation of old + new data).
*
* Requirement: 4.4 (ha-repl-hardening) — retry by reconnecting initiates new transfer.
*/
static void test_snapshot_recv_reconnect_discards_snappart(void)
{
char tmpdir[] = "/tmp/xcectest_snapreconn_XXXXXX";
TEST_ASSERT_NOT_NULL(mkdtemp(tmpdir));
char snap_dir[512];
snprintf(snap_dir, sizeof(snap_dir), "%s/snap", tmpdir);
TEST_ASSERT_EQUAL_INT(0, mkdir(snap_dir, 0700));
persist_t *p = calloc(1, sizeof(persist_t));
TEST_ASSERT_NOT_NULL(p);
persist_config_t pcfg = persist_config_defaults();
persist_set_workdir(p, tmpdir, "ctrl-snapreconn");
persist_init(p, &pcfg, NULL);
persist_start(p);
ha_state_t ha;
snap_recv_ha_init(&ha);
uint64_t snap_lsn = 300;
uint8_t first[64];
uint8_t second[64];
memset(first, 0xAA, 64);
memset(second, 0xBB, 64);
/* ── First transfer attempt: send chunk 0 ── */
snapshot_transfer_t c0;
memset(&c0, 0, sizeof(c0));
c0.snapshot_lsn = snap_lsn;
c0.chunk_index = 0;
c0.chunk_offset = 0;
c0.total_size = 64; /* single-chunk transfer */
c0.is_last = 0; /* not last — simulates partial in-flight transfer */
int rc = ha_handle_snapshot_chunk(&ha, p, snap_dir, &c0, first, 64);
TEST_ASSERT_EQUAL_INT(0, rc);
/* snap.part must exist and contain exactly 64 bytes (first chunk) */
char part_path[600];
snprintf(part_path, sizeof(part_path), "%s/snap.part", snap_dir);
struct stat st;
TEST_ASSERT_EQUAL_INT_MESSAGE(0, stat(part_path, &st),
"snap.part must exist after first chunk");
TEST_ASSERT_EQUAL_UINT64_MESSAGE(64, (uint64_t)st.st_size,
"snap.part must be 64 bytes after first chunk");
/* ── Simulate reconnect: caller discards snap.part ── */
TEST_ASSERT_EQUAL_INT_MESSAGE(0, unlink(part_path),
"unlink snap.part must succeed (simulating reconnect)");
/* ── Second transfer attempt: restart from chunk 0 ── */
snapshot_transfer_t c0b;
memset(&c0b, 0, sizeof(c0b));
c0b.snapshot_lsn = snap_lsn;
c0b.chunk_index = 0;
c0b.chunk_offset = 0;
c0b.total_size = 64;
c0b.is_last = 0; /* still not last — just verifying discard */
rc = ha_handle_snapshot_chunk(&ha, p, snap_dir, &c0b, second, 64);
TEST_ASSERT_EQUAL_INT(0, rc);
/* snap.part must exist and contain exactly 64 bytes (second chunk only,
* not 128 bytes which would indicate old data was appended) */
TEST_ASSERT_EQUAL_INT_MESSAGE(0, stat(part_path, &st),
"snap.part must exist after reconnect chunk 0");
TEST_ASSERT_EQUAL_UINT64_MESSAGE(64, (uint64_t)st.st_size,
"snap.part must be 64 bytes (not 128) — stale data discarded");
/* Verify the content is the second chunk (0xBB bytes), not the first (0xAA) */
FILE *f = fopen(part_path, "rb");
TEST_ASSERT_NOT_NULL_MESSAGE(f, "snap.part must be readable");
uint8_t buf[64];
size_t n = fread(buf, 1, 64, f);
fclose(f);
TEST_ASSERT_EQUAL_UINT64_MESSAGE(64, (uint64_t)n, "must read 64 bytes from snap.part");
TEST_ASSERT_EQUAL_UINT8_MESSAGE(0xBB, buf[0],
"snap.part content must be second chunk (0xBB), not first (0xAA)");
ha_fini(&ha);
persist_stop(p);
persist_fini(p);
free(p);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", tmpdir);
system(cmd);
printf("test_snapshot_recv_reconnect_discards_snappart: PASS\n");
}
/* ── Task 5.1: handle_ctrlhello — connection setup only ─────────────────────
*
* Verify that after the ha-repl-hardening simplification, handle_ctrlhello
* does connection bookkeeping only and enqueues NO replication messages.
*
* Requirements: 1.1, 1.2
*/
static int g_ctrlhello_repl_msg_count = 0;
/* Count any xce_request calls (via the wal stream hook) that arrive during
* handle_ctrlhello. After simplification this must remain 0.
* Note: the WAL streaming hook is for ha_stream_wal_to_standby; if
* handle_ctrlhello were still calling xce_request directly the test would
* need a separate seam — but since the simplified code has none, we simply
* verify no crash and correct state. */
static void test_ctrlhello_no_repl_messages_enqueued(void)
{
/* Build a minimal cluster_t in CTRL_STANDBY role.
* Intentionally leave persist.repl, persist.wal_path, and
* standby_endpoints uninitialised (zero/NULL) — the simplified
* handle_ctrlhello must not touch any of these fields.
* The old code would crash or corrupt memory if it reached
* repl_add_standby / WAL streaming / push_config_to_standbys
* with NULL repl state. */
cluster_t c;
memset(&c, 0, sizeof(c));
ha_config_t hcfg;
memset(&hcfg, 0, sizeof(hcfg));
hcfg.heartbeat_timeout_ms = 10000;
hcfg.election_timeout_ms = 1500;
ha_init(&c.ha, &hcfg, 0);
c.ha.primary_ctrl_fd = -1;
atomic_store_explicit(&c.ha.role, (int32_t)CTRL_STANDBY, memory_order_release);
/* Give myconf a non-zero config_version_tag so the old config-push branch
* would have fired (standby.config_tag=0 != primary_tag=0xCAFE). */
myconf_t conf;
memset(&conf, 0, sizeof(conf));
conf.config_version_tag = 0xCAFEULL;
c.myconf = &conf;
/* Give persist a non-zero committed_lsn so the old WAL-streaming branch
* would have fired (standby.applied_lsn=0 < committed_lsn=100). */
atomic_store_explicit(&c.persist.committed_lsn, 100ULL, memory_order_release);
/* Leave persist.wal_path as NULL / empty — old code would have opened NULL. */
/* Build a minimal CtrlHelloRequest: standby reports lsn=0, tag=0 */
ctrl_hello_req_t hello;
memset(&hello, 0, sizeof(hello));
hello.name = "standby-test";
hello.applied_lsn = 0;
hello.config_tag = 0;
xce_request_t req;
memset(&req, 0, sizeof(req));
req.body_which = Request_body_ctrlhellomsg;
req.body.ctrlhellomsg = &hello;
endpoint_t ep;
memset(&ep, 0, sizeof(ep));
ep.fd = 77;
/* Reset repl message counter */
g_ctrlhello_repl_msg_count = 0;
/* Call the simplified handle_ctrlhello — must return 0 without crash */
int rc = handle_ctrlhello(&c, &ep, &req);
TEST_ASSERT_EQUAL_INT_MESSAGE(0, rc,
"handle_ctrlhello must return 0 (Req 1.1)");
/* Connection bookkeeping must have happened */
TEST_ASSERT_EQUAL_INT_MESSAGE(77, c.ha.primary_ctrl_fd,
"handle_ctrlhello must set primary_ctrl_fd = ep->fd (Req 1.1)");
/* ha_on_heartbeat_received must have been called (last_activity updated) */
TEST_ASSERT_TRUE_MESSAGE(c.ha.last_activity > 0,
"handle_ctrlhello must call ha_on_heartbeat_received (Req 1.2)");
/* Idempotency: second call must not overwrite primary_ctrl_fd */
ep.fd = 99;
handle_ctrlhello(&c, &ep, &req);
TEST_ASSERT_EQUAL_INT_MESSAGE(77, c.ha.primary_ctrl_fd,
"handle_ctrlhello: second call must not overwrite primary_ctrl_fd (Req 1.1)");
/* Verify no replication messages were counted.
* With the simplified implementation, handle_ctrlhello never calls
* xce_request() — so g_ctrlhello_repl_msg_count stays 0. If xce_request
* were called for OPCode_replConfigPush or OPCode_walCatchupEntry the
* test binary would crash (NULL ep infrastructure) before reaching here. */
TEST_ASSERT_EQUAL_INT_MESSAGE(0, g_ctrlhello_repl_msg_count,
"handle_ctrlhello must enqueue no OPCode_replConfigPush or "
"OPCode_walCatchupEntry messages (Req 1.1, 1.2)");
ha_fini(&c.ha);
printf("test_ctrlhello_no_repl_messages_enqueued: PASS\n");
}
/* Declare handle_ctrlhello for this translation unit (defined in config_repl.c) */
extern int handle_ctrlhello(cluster_t *c, endpoint_t *ep, xce_request_t *req);
#endif /* XCE_TESTING */
/* ═══════════════════════════════════════════════════════════════════════════
* xce-audit-invariants controller pass, thread-role violation 2 fix
* (2026-07-18, the more urgent violation — catch-up can stream an unbounded
* amount of WAL data): ha_catchup_continuation_fn must not block the
* delaymgr thread — the SAME single thread that drives heartbeats and
* election timeouts cluster-wide (ha-async-io.md thread-role contract).
*
* These tests drive a REAL, STARTED delaymgr (single worker thread, exactly
* as production — delaymgr_t.worker is a single pthread, not a pool) so the
* scheduled one-shot continuation task is picked up and run BY that thread,
* proving whether it blocks. ha_repl_stream_wal_hook gates the blocking
* streaming call so the test controls exactly when it completes. A cheap
* PROBE task queued on the SAME delaymgr right after the continuation is
* scheduled stands in for "the next heartbeat/election timer" — whether it
* fires promptly is the load-bearing assertion.
* ═══════════════════════════════════════════════════════════════════════════ */
#ifdef XCE_TESTING
typedef struct {
pthread_mutex_t mu;
pthread_cond_t release_cv;
pthread_cond_t entered_cv;
int gate_open;
_Atomic int entered;
_Atomic int calls;
} cc_gate_t;
static cc_gate_t g_cc_gate;
static void cc_gate_init(cc_gate_t *g)
{
pthread_mutex_init(&g->mu, NULL);
pthread_cond_init(&g->release_cv, NULL);
pthread_cond_init(&g->entered_cv, NULL);
g->gate_open = 0;
atomic_store(&g->entered, 0);
atomic_store(&g->calls, 0);
}
static void cc_gate_destroy(cc_gate_t *g)
{
pthread_mutex_destroy(&g->mu);
pthread_cond_destroy(&g->release_cv);
pthread_cond_destroy(&g->entered_cv);
}
static void cc_gate_open(cc_gate_t *g)
{
pthread_mutex_lock(&g->mu);
g->gate_open = 1;
pthread_cond_broadcast(&g->release_cv);
pthread_mutex_unlock(&g->mu);
}
static int cc_gate_wait_entered(cc_gate_t *g, int n, int timeout_ms)
{
struct timespec deadline;
clock_gettime(CLOCK_REALTIME, &deadline);
deadline.tv_sec += timeout_ms / 1000;
deadline.tv_nsec += (long)(timeout_ms % 1000) * 1000000L;
if (deadline.tv_nsec >= 1000000000L) { deadline.tv_sec++; deadline.tv_nsec -= 1000000000L; }
pthread_mutex_lock(&g->mu);
int rc = 0;
while (atomic_load(&g->entered) < n) {
rc = pthread_cond_timedwait(&g->entered_cv, &g->mu, &deadline);
if (rc != 0) break;
}
int entered = atomic_load(&g->entered);
pthread_mutex_unlock(&g->mu);
return entered >= n ? 0 : -1;
}
/* Stand-in for the blocking WAL stream (ha_stream_wal_to_standby): count,
* signal entry, park until the test opens the gate, then return success.
* Runs on a slow-lane worker (flag ON) or inline on the delaymgr worker
* thread (flag OFF). */
static int cc_gated_stream_hook(void *ep, const char *wal_path,
uint64_t standby_lsn, uint64_t committed_lsn)
{
(void)ep; (void)wal_path; (void)standby_lsn; (void)committed_lsn;
atomic_fetch_add(&g_cc_gate.calls, 1);
pthread_mutex_lock(&g_cc_gate.mu);
atomic_fetch_add(&g_cc_gate.entered, 1);
pthread_cond_broadcast(&g_cc_gate.entered_cv);
while (!g_cc_gate.gate_open)
pthread_cond_wait(&g_cc_gate.release_cv, &g_cc_gate.mu);
pthread_mutex_unlock(&g_cc_gate.mu);
return 0;
}
/* Real, started delaymgr pass-through runner — production's run_delay_tasks
* (cluster.c) is not linked into controller_unit_test; mirrors
* test_commit_durability.c's dur_run_delay_task. */
static int cc_run_delay_task(delay_task_entry_fn_t entry, void *arg)
{
return entry(arg);
}
static int g_cc_ep_placeholder; /* fake non-NULL repl_ep_t identity */
typedef struct { _Atomic int fired; } cc_probe_t;
static int cc_probe_fn(void *arg)
{
cc_probe_t *p = (cc_probe_t *)arg;
atomic_store(&p->fired, 1);
return 0;
}
static int cc_poll_flag(_Atomic int *flag, int timeout_ms)
{
for (int i = 0; i < timeout_ms; i++) {
if (atomic_load(flag))
break;
struct timespec ts = { .tv_sec = 0, .tv_nsec = 1000000L }; /* 1 ms */
nanosleep(&ts, NULL);
}
return atomic_load(flag);
}
static void cc_run_offload_probe(int offload_on, const char *label)
{
char tmpdir[256];
snprintf(tmpdir, sizeof(tmpdir), "/tmp/xce_cc_%s_XXXXXX",
offload_on ? "on" : "off");
TEST_ASSERT_NOT_NULL(mkdtemp(tmpdir));
cluster_t c;
memset(&c, 0, sizeof(c));
persist_config_t pcfg = persist_config_defaults();
pcfg.wal_sync_ms = 5000;
persist_set_workdir(&c.persist, tmpdir, "ctrl-test");
TEST_ASSERT_EQUAL_INT(0, persist_init(&c.persist, &pcfg, &c));
TEST_ASSERT_EQUAL_INT(0, persist_start(&c.persist));
pthread_mutex_lock(&c.persist.lock);
c.persist.current_lsn = 11; /* tip = 10 */
pthread_mutex_unlock(&c.persist.lock);
atomic_store(&c.persist.committed_lsn, 10);
atomic_store(&c.persist.durable_lsn, 10);
TEST_ASSERT_TRUE(repl_add_standby(&c.persist.repl, &g_cc_ep_placeholder,
"ccsb0", 7600) >= 0);
ha_config_t hcfg = {
.heartbeat_interval_ms = 3000,
.heartbeat_timeout_ms = 10000,
.election_timeout_ms = 2000,
.probe_connect_timeout_ms = 500,
.max_promotion_retries = 5,
};
TEST_ASSERT_EQUAL_INT(0, ha_init(&c.ha, &hcfg, 0));
TEST_ASSERT_EQUAL_INT(0, slowlane_init(&c.slowlane, 2, 4));
TEST_ASSERT_EQUAL_INT(0, delaymgr_init(&c.delaymgr, 5, cc_run_delay_task));
TEST_ASSERT_EQUAL_INT(0, delaymgr_start(&c.delaymgr));
cc_gate_init(&g_cc_gate);
ha_repl_stream_wal_hook = cc_gated_stream_hook;
ha_set_catchup_offload_for_test(offload_on);
/* acked_lsn=0 < target(=10) -> schedules exactly one continuation. */
TEST_ASSERT_EQUAL_INT(0,
ha_walack_continuation_for_test(&c, &g_cc_ep_placeholder, 0, 0));
TEST_ASSERT_EQUAL_INT_MESSAGE(0, cc_gate_wait_entered(&g_cc_gate, 1, 1000),
"the streaming call must reach the gate (on the slow lane, or — "
"RED — inline on the delaymgr thread)");
/* Queue a cheap probe task RIGHT AFTER, on the SAME single-worker
* delaymgr — a stand-in for the next heartbeat/election timer. */
cc_probe_t probe;
atomic_store(&probe.fired, 0);
TEST_ASSERT_EQUAL_INT(0,
delay_task_ms(&c.delaymgr, 1, 1, cc_probe_fn, &probe));
if (offload_on) {
TEST_ASSERT_TRUE_MESSAGE(cc_poll_flag(&probe.fired, 1000),
"GREEN: with catch-up offloaded to the slow lane, the delaymgr "
"worker thread must be free to run the NEXT queued task "
"promptly, even while the streaming body is still parked");
} else {
TEST_ASSERT_FALSE_MESSAGE(cc_poll_flag(&probe.fired, 300),
"RED: with offload OFF the streaming body runs INLINE on the "
"delaymgr worker thread, so the next queued task (standing in "
"for a heartbeat/election timer) cannot fire until it returns "
"-- this is the blocking-on-delaymgr shape the fix removes");
}
cc_gate_open(&g_cc_gate);
/* Drain: wait for catchup_inflight[0] to clear (lane/inline body done),
* then confirm the probe (queued behind it in the OFF/RED case) fires. */
for (int i = 0; i < 1000; i++) {
if (atomic_load_explicit(&c.ha.catchup_inflight[0],
memory_order_acquire) == 0)
break;
struct timespec ts = { .tv_sec = 0, .tv_nsec = 1000000L };
nanosleep(&ts, NULL);
}
TEST_ASSERT_TRUE_MESSAGE(cc_poll_flag(&probe.fired, 1000),
"the probe task must eventually fire once the gate is released");
ha_repl_stream_wal_hook = NULL;
ha_set_catchup_offload_for_test(0); /* restore production default */
cc_gate_destroy(&g_cc_gate);
delaymgr_stop(&c.delaymgr);
delaymgr_fini(&c.delaymgr);
slowlane_fini(&c.slowlane);
ha_fini(&c.ha);
persist_stop(&c.persist);
persist_fini(&c.persist);
repl_fini(&c.persist.repl);
printf("%s: PASS\n", label);
}
static void test_catchup_offload_probe_runs_promptly(void)
{
cc_run_offload_probe(1, "test_catchup_offload_probe_runs_promptly");
}
static void test_catchup_inline_probe_blocks_RED(void)
{
cc_run_offload_probe(0, "test_catchup_inline_probe_blocks_RED");
}
/* ── bug-1476: concurrent load_primary_config() race on myconf->cluster_config ──
*
* load_primary_config()'s free-decode-publish sequence for
* myconf->cluster_config was completely unguarded by any lock. A live
* 3-node ASan soak (config-upgrade-snapshot task 8.9 re-verification,
* ctrl-3) caught a genuine heap-use-after-free: two concurrent
* handle_repl_config_push deliveries for the SAME standby raced two
* concurrent load_primary_config() calls on separate VTASK_LIVE_BLOCK
* workers -- one call's decode had already published a non-NULL,
* still-populating cluster_config_t* into the shared myconf->cluster_config
* field (decode_ClusterConfig_ptr calloc's *and publishes* the pointer via
* its out-parameter BEFORE decode_ClusterConfig populates the nested fields
* such as resources -- confirmed by reading
* lib/controller.capnp.c:17067-17077) while a second, concurrent invocation
* observed that same non-NULL pointer, assumed (per the single free-then-
* decode sequence) it was a prior FULLY-decoded config, and freed it out
* from under the first call's still-in-flight decode.
*
* load_primary_config_race_hook (XCE_TESTING-only, config_repl.c) lets this
* test deterministically force two REAL pthreads through that exact race
* window instead of depending on scheduler timing: thread A captures the
* config pointer it is about to retire and parks at the hook; thread B (a
* full, real, concurrent load_primary_config() call for the SAME myconf_t)
* is released to run while A is parked.
*
* RED (pre-fix, no lock): B runs to completion unblocked -- freeing the
* SAME pointer A already captured and publishing its own config. Opening
* the gate lets A retire (free) that already-freed pointer a SECOND time: a
* genuine, deterministic, ASan-catchable double-free from the identical
* missing-lock root cause the live crash exposed. (The exact
* decode_Resource_list-mid-write UAF the live trace shows additionally
* requires pausing inside the generated capnp decoder, which the fix
* deliberately avoids touching -- see the fix's own comment in
* load_primary_config; this reproduction targets the same unguarded
* read-free-decode-publish sequence and is caught by ASan the same way.)
*
* GREEN (post-fix): myconf->lock serializes the two calls end-to-end -- B
* cannot even acquire the lock (let alone reach its own retire step or
* corrupt anything) until A's whole call, hook included, returns and
* releases it. No pointer is ever freed twice, and load_primary_config (fix
* part 2) no longer decodes directly into the shared field at all, closing
* the exposure for any OTHER reader that never takes the lock. */
typedef struct {
pthread_mutex_t mu;
pthread_cond_t release_cv;
pthread_cond_t entered_cv;
int gate_open;
_Atomic int entered;
} lpc_gate_t;
static lpc_gate_t g_lpc_gate;
static _Atomic int g_lpc_hook_block_next; /* 1 = the NEXT hook call should park */
static void lpc_gate_init(lpc_gate_t *g)
{
pthread_mutex_init(&g->mu, NULL);
pthread_cond_init(&g->release_cv, NULL);
pthread_cond_init(&g->entered_cv, NULL);
g->gate_open = 0;
atomic_store(&g->entered, 0);
}
static void lpc_gate_destroy(lpc_gate_t *g)
{
pthread_mutex_destroy(&g->mu);
pthread_cond_destroy(&g->release_cv);
pthread_cond_destroy(&g->entered_cv);
}
static void lpc_gate_open(lpc_gate_t *g)
{
pthread_mutex_lock(&g->mu);
g->gate_open = 1;
pthread_cond_broadcast(&g->release_cv);
pthread_mutex_unlock(&g->mu);
}
static int lpc_gate_wait_entered(lpc_gate_t *g, int timeout_ms)
{
struct timespec deadline;
clock_gettime(CLOCK_REALTIME, &deadline);
deadline.tv_sec += timeout_ms / 1000;
deadline.tv_nsec += (long)(timeout_ms % 1000) * 1000000L;
if (deadline.tv_nsec >= 1000000000L) { deadline.tv_sec++; deadline.tv_nsec -= 1000000000L; }
pthread_mutex_lock(&g->mu);
int rc = 0;
while (atomic_load(&g->entered) < 1) {
rc = pthread_cond_timedwait(&g->entered_cv, &g->mu, &deadline);
if (rc != 0) break;
}
int entered = atomic_load(&g->entered);
pthread_mutex_unlock(&g->mu);
return entered >= 1 ? 0 : -1;
}
/* Fires from INSIDE load_primary_config -- holding no lock of its own under
* the OLD (pre-fix) code, or holding myconf->lock under the fixed code.
* Only the FIRST call (armed via g_lpc_hook_block_next) actually parks;
* later calls pass straight through, so thread B's own call runs unimpeded
* when it reaches this same hook (pre-fix), or never even reaches it
* (post-fix -- it blocks acquiring myconf->lock before getting this far). */
static void lpc_race_hook(void)
{
if (!atomic_exchange(&g_lpc_hook_block_next, 0))
return;
pthread_mutex_lock(&g_lpc_gate.mu);
atomic_fetch_add(&g_lpc_gate.entered, 1);
pthread_cond_broadcast(&g_lpc_gate.entered_cv);
while (!g_lpc_gate.gate_open)
pthread_cond_wait(&g_lpc_gate.release_cv, &g_lpc_gate.mu);
pthread_mutex_unlock(&g_lpc_gate.mu);
}
typedef struct {
cluster_t *c;
_Atomic int done;
_Atomic int rc;
} lpc_thread_arg_t;
static void *lpc_call_load_primary_config(void *arg)
{
lpc_thread_arg_t *a = (lpc_thread_arg_t *)arg;
int rc = load_primary_config(a->c);
atomic_store(&a->rc, rc);
atomic_store(&a->done, 1);
return NULL;
}
static void test_bug1476_concurrent_load_primary_config_no_uaf_or_double_free(void)
{
char tmp[256];
strcpy(tmp, "/tmp/xce_cr1476_race_XXXXXX");
TEST_ASSERT_NOT_NULL(mkdtemp(tmp));
cluster_t c;
memset(&c, 0, sizeof(c));
myconf_t *mc = t43_attach_myconf(&c, tmp); /* inits mc->lock */
/* conf_save_config only mkdir()s the LAST path component (workdir/name/
* conf); unlike other t43_* fixtures this test does not call
* t42_make_cluster (which creates workdir/name via persist_init) since
* load_primary_config only touches c->myconf -- create workdir/name
* directly instead. */
char ctrldir[300];
snprintf(ctrldir, sizeof(ctrldir), "%s/ctrl-test", tmp);
TEST_ASSERT_EQUAL_INT(0, mkdir(ctrldir, 0700));
/* Establish an initial live config so BOTH racing calls exercise the
* "free the OLD config" retire step (not the first-ever-load path) --
* matches the live crash, which happened on a standby reloading an
* ALREADY-activated config, not on first boot. */
size_t blen0 = 0;
uint8_t *bytes0 = t43_make_config_blob(&blen0);
uint8_t sha0[32];
SHA256(bytes0, blen0, sha0);
TEST_ASSERT_EQUAL_INT(0, conf_save_config(mc, bytes0, blen0, sha0));
free(bytes0);
TEST_ASSERT_EQUAL_INT(0, load_primary_config(&c));
TEST_ASSERT_NOT_NULL(mc->cluster_config);
/* Both racing calls independently resolve + decode the SAME conf/current
* file -- real production behaviour: two concurrent
* handle_repl_config_push deliveries for the same standby race over the
* SAME on-disk config, not different ones. */
lpc_gate_init(&g_lpc_gate);
atomic_store(&g_lpc_hook_block_next, 1);
load_primary_config_race_hook = lpc_race_hook;
lpc_thread_arg_t arg_a = { .c = &c, .done = 0, .rc = 0 };
lpc_thread_arg_t arg_b = { .c = &c, .done = 0, .rc = 0 };
pthread_t thread_a;
TEST_ASSERT_EQUAL_INT(0,
pthread_create(&thread_a, NULL, lpc_call_load_primary_config, &arg_a));
TEST_ASSERT_EQUAL_INT_MESSAGE(0, lpc_gate_wait_entered(&g_lpc_gate, 2000),
"thread A must reach the race-hook checkpoint inside "
"load_primary_config before the test proceeds");
pthread_t thread_b;
TEST_ASSERT_EQUAL_INT(0,
pthread_create(&thread_b, NULL, lpc_call_load_primary_config, &arg_b));
/* Snapshot whether B completed WHILE A was still parked -- the
* serialization proof. Captured into a plain variable (not asserted
* yet) so a pre-fix failure here does not abort the test before it
* reaches the release below: pre-fix (RED) the crash triggered by that
* release is the primary, load-bearing signal; this flag is
* corroborating evidence, asserted only after both threads have safely
* joined post-release. */
int b_raced_through_while_a_parked = cc_poll_flag(&arg_b.done, 300);
lpc_gate_open(&g_lpc_gate);
TEST_ASSERT_TRUE_MESSAGE(cc_poll_flag(&arg_a.done, 2000),
"thread A must complete once released");
pthread_join(thread_a, NULL);
TEST_ASSERT_TRUE_MESSAGE(cc_poll_flag(&arg_b.done, 2000),
"thread B must complete once unblocked by A's release");
pthread_join(thread_b, NULL);
load_primary_config_race_hook = NULL;
lpc_gate_destroy(&g_lpc_gate);
TEST_ASSERT_EQUAL_INT(0, atomic_load(&arg_a.rc));
TEST_ASSERT_EQUAL_INT(0, atomic_load(&arg_b.rc));
/* No corruption: the final published config is fully valid (whichever
* of the two calls happened to finish last -- both raced the SAME
* conf/current file, so either outcome is a legitimate, fully-decoded
* config, never a torn/freed one). */
TEST_ASSERT_NOT_NULL(mc->cluster_config);
TEST_ASSERT_NOT_NULL(mc->cluster_config->clustername);
TEST_ASSERT_EQUAL_STRING("t43-upgrade", mc->cluster_config->clustername);
/* GREEN: myconf->lock must have kept B blocked the whole time A was
* parked mid-call. RED (no lock) reliably fails this -- but reliably
* crashes (ASan double-free abort) even earlier, at lpc_gate_open()
* above, before ever reaching this line. */
TEST_ASSERT_EQUAL_INT_MESSAGE(0, b_raced_through_while_a_parked,
"thread B's load_primary_config must stay blocked (serialized by "
"myconf->lock) while thread A is parked mid-call");
t43_free_myconf(&c);
printf("test_bug1476_concurrent_load_primary_config_no_uaf_or_double_free: PASS\n");
}
#endif /* XCE_TESTING */
/* ── dispatch ───────────────────────────────────── */
void test_config_repl(void)
{
UnitySetTestFile(__FILE__);
RUN_TEST(test_conf_read_current_filename_missing);
RUN_TEST(test_conf_read_current_filename_empty_file);
RUN_TEST(test_conf_read_current_filename_path_separator);
RUN_TEST(test_conf_read_current_filename_bad_prefix);
RUN_TEST(test_conf_read_current_filename_wrong_hex_length);
RUN_TEST(test_conf_save_creates_pointer_file);
RUN_TEST(test_conf_save_filename_has_12_hex_suffix);
RUN_TEST(test_conf_trim_keeps_only_n_versions);
RUN_TEST(test_conf_get_saved_tag_no_config);
RUN_TEST(test_conf_get_saved_tag_after_save);
RUN_TEST(test_conf_check_stale_disabled);
RUN_TEST(test_conf_check_stale_fresh);
RUN_TEST(test_conf_check_stale_aged);
RUN_TEST(test_config_contains_reserved_name_absent);
RUN_TEST(test_sanitise_cn_printable);
RUN_TEST(test_sanitise_cn_control_chars);
RUN_TEST(test_sanitise_cn_truncated);
RUN_TEST(test_conf_save_config_path_consistency);
/* Task 4.1: WAL_CONFIG_MARKER type + reference-only codec */
RUN_TEST(test_config_marker_enum_value_is_50);
RUN_TEST(test_config_marker_encode_decode_roundtrip);
RUN_TEST(test_config_marker_decode_truncated_fails);
RUN_TEST(test_config_marker_encode_short_buffer_fails);
/* Task 4.2: append marker via unified log + derive committed config */
RUN_TEST(test_config_marker_append_via_unified_log);
RUN_TEST(test_committed_marker_derives_after_commit);
RUN_TEST(test_uncommitted_marker_not_yet_committed_config);
RUN_TEST(test_divergent_marker_truncated_like_job_entry);
/* Task 4.2 r1: live wiring + compaction-safe derive */
RUN_TEST(test_config_commit_change_live_path_commits_and_derives);
RUN_TEST(test_committed_marker_survives_checkpoint_trim);
RUN_TEST(test_config_activate_match_activates_and_unfences);
RUN_TEST(test_config_activate_mismatch_fences_and_does_not_activate);
RUN_TEST(test_config_activate_obtained_bytes_verified_before_activate);
RUN_TEST(test_config_activate_recovery_uses_latest_committed_marker);
/* Task 4.3 r1 remediation: production integration (push-path sole activation,
* no-marker fallback, serve-fence enforced by dispatch gate + promotion). */
RUN_TEST(test_push_path_mismatch_does_not_preactivate);
RUN_TEST(test_config_activate_no_marker_falls_back_and_loads);
/* config-upgrade-snapshot task 6.1: Activation Fence. */
RUN_TEST(test_upgrade_materialization_verify_no_marker_clears_fence);
RUN_TEST(test_upgrade_materialization_verify_matching_materialization_clears_fence);
RUN_TEST(test_upgrade_materialization_verify_incomplete_materialization_fences);
RUN_TEST(test_upgrade_materialization_verify_stale_local_bytes_after_materialization_fences);
RUN_TEST(test_serve_fence_enforced_by_dispatch_gate_and_promotion);
/* Task 4.3 r2 remediation: commit-advance retry clears a push-before-commit
* serve-fence (Finding D / R7.9). */
RUN_TEST(test_commit_advance_retry_clears_push_before_commit_fence);
/* config-upgrade-snapshot task 6.2: Activation Fence gate composition +
* self-triggering retry. */
RUN_TEST(test_upgrade_materialization_fence_enforced_by_dispatch_gate_and_promotion);
RUN_TEST(test_schedule_upgrade_materialization_retry_noop_when_not_fenced);
RUN_TEST(test_schedule_upgrade_materialization_retry_noop_when_delaymgr_not_running);
RUN_TEST(test_upgrade_materialization_retry_fn_recovers_from_stale_bytes_fence);
RUN_TEST(test_commit_advance_wiring_calls_upgrade_materialization_schedule_retry);
RUN_TEST(test_ha_phase2_retry_fn_noop_when_already_done);
RUN_TEST(test_ha_phase2_retry_fn_does_not_latch_on_failure_and_succeeds_on_retry);
RUN_TEST(test_schedule_phase2_retry_noop_when_already_done);
RUN_TEST(test_schedule_phase2_retry_noop_when_delaymgr_not_running);
/* config-upgrade-snapshot task 6.2 remediation: fence set by a REAL
* production trigger (apply_committed_entry's WAL_CONFIG_MARKER case),
* not a direct test call -- proves the fence is reachable at all. */
RUN_TEST(test_wal_config_marker_apply_sets_fence_via_real_checkpoint_miss);
/* bug-1469: WAL_CONFIG_MARKER apply must activate config on the
* ORIGINATING member too, not just receiving standbys. */
RUN_TEST(test_wal_config_marker_apply_activates_originating_member_config);
/* config-upgrade-snapshot task 8.8: a second configuration-change
* marker committing before the first's snapshot install completes
* everywhere must cleanly supersede it, never leave it partially
* applied or conflated with the newer one. */
RUN_TEST(test_second_config_marker_supersedes_first_still_installing_on_member);
/* config-upgrade-snapshot task 8.7 Scenario 2: leadership change
* mid-materialization completes via the same generic apply-drain path. */
RUN_TEST(test_leadership_change_mid_materialization_completes_via_same_generic_apply_drain);
#ifdef XCE_TESTING
RUN_TEST(test_load_primary_config_missing_returns_error);
RUN_TEST(test_wait_all_with_timeout_slow_threads);
RUN_TEST(test_wait_all_with_timeout_fast_threads);
/* bug-1381: push_config_transport_only endpoint-lifetime regression */
RUN_TEST(test_configpush_transport_holds_endpoint_ref_across_send);
/* raft-adapter-conformance task 2.1: config-push reject reply integrity */
RUN_TEST(test_config_push_sha256_mismatch_sends_explicit_reject_reply);
/* raft-adapter-conformance task 2.2: config-push reply term adoption */
RUN_TEST(test_config_push_reply_higher_term_adopts_and_steps_down);
/* raft-adapter-conformance task 2.3: full config-push reply-integrity
* coverage -- remaining reject paths, the EAGAIN accept path, and the
* term-adoption check on the accept branch. */
RUN_TEST(test_config_push_malformed_request_sends_explicit_reject_reply);
RUN_TEST(test_config_push_missing_bytes_sends_explicit_reject_reply);
RUN_TEST(test_config_push_save_failure_sends_explicit_reject_reply);
RUN_TEST(test_config_push_eagain_activation_deferred_still_sends_accepted);
RUN_TEST(test_config_push_reply_higher_term_adopts_on_accept);
/* Task 2.1: OPCode_walCatchupEntry handler */
RUN_TEST(test_wal_catchup_entry_advances_applied_lsn);
RUN_TEST(test_wal_catchup_entry_error_skipped_no_crash);
RUN_TEST(test_bug1479_ae_reject_sends_nack_not_silence);
RUN_TEST(test_wal_catchup_entry_null_entry_no_crash);
/* Task 2.2: batch WAL catch-up entries */
RUN_TEST(test_wal_catchup_batch_advances_applied_lsn);
RUN_TEST(test_wal_catchup_partial_batch);
RUN_TEST(test_wal_catchup_batch_error_entry_skipped);
RUN_TEST(test_wal_catchup_batch_zero_entries_fallback);
/* Task 6.2: additional WAL catch-up and batch handling tests */
RUN_TEST(test_wal_catchup_batch_256_entries);
RUN_TEST(test_wal_catchup_batch_applied_lsn_only_after_full_batch);
/* Task 2.3: OPCode_nop heartbeat reply carries stateReport */
RUN_TEST(test_nop_reply_carries_state_report);
RUN_TEST(test_nop_reply_zero_state_fresh_standby);
/* Task 3.4: ha_stream_wal_to_standby batch WAL streaming */
RUN_TEST(test_wal_stream_500_entries_two_batches);
RUN_TEST(test_wal_stream_partial_batch);
RUN_TEST(test_wal_stream_empty_range_no_batches);
RUN_TEST(test_wal_stream_skips_checkpoint_marker);
RUN_TEST(test_bug1475_catchup_survives_midstream_checkpoint); /* bug-1475 */
RUN_TEST(test_wal_stream_term_from_index_not_raw_hdr); /* bug-1028 */
/* Task 3.5: snapshot chunk transfer (sender side) */
RUN_TEST(test_snapshot_transfer_two_chunks);
RUN_TEST(test_bug1475_finding2_snapshot_install_checkpoint_term_absent); /* bug-1475 Finding 2 */
RUN_TEST(test_snapshot_transfer_small_less_than_one_chunk);
RUN_TEST(test_snapshot_transfer_stops_and_propagates_send_failure);
/* Task 3.5c: standby snapshot receive handler */
RUN_TEST(test_snapshot_recv_two_chunks_assembles_and_renames);
/* config-upgrade-snapshot task 1: prior SNAPSHOT_FORMAT_VERSION rejected
* fail-loud by a binary built against the bumped version */
RUN_TEST(test_snapshot_recv_old_format_version_rejected_fail_loud);
/* Task 6.1: legacy position-only file consumed end-to-end via the
* receive handler — entities_restored=false path */
RUN_TEST(test_snapshot_recv_legacy_file_advances_without_entities);
RUN_TEST(test_snapshot_recv_size_mismatch_fails);
RUN_TEST(test_snapshot_recv_null_args_fail);
/* Task 6.4-A: 128KB snapshot in 2 chunks — full-size receive path */
RUN_TEST(test_snapshot_recv_128kb_two_chunks);
RUN_TEST(test_snapshot_recv_out_of_order_chunks_assemble_correctly);
/* Task 3.5d: reconnect discards snap.part */
RUN_TEST(test_snapshot_recv_reconnect_discards_snappart);
/* Task 5.1: handle_ctrlhello connection setup only — no repl messages */
RUN_TEST(test_ctrlhello_no_repl_messages_enqueued);
/* xce-audit-invariants controller pass, thread-role violation 2 fix
* (2026-07-18): catch-up continuation slow-lane offload */
RUN_TEST(test_catchup_offload_probe_runs_promptly);
RUN_TEST(test_catchup_inline_probe_blocks_RED);
/* bug-1476: concurrent load_primary_config() UAF/double-free race */
RUN_TEST(test_bug1476_concurrent_load_primary_config_no_uaf_or_double_free);
#endif
/* Task A: raw capnp shims */
RUN_TEST(test_replconfig_req_ssl_encode);
RUN_TEST(test_replconfig_reply_raw_encode);
RUN_TEST(test_upgrade_config_req_extract_raw);
}
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