tdb2: test: import tdb1's tests.

The main change is to s/tdb/tdb1_/ everywhere.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(Imported from CCAN commit fab544c24c1ad6523f95893abcaec4e6cce6c2b4)

33 files changed, 2102 insertions, 0 deletions

diff --git a/lib/tdb2/test/jenkins-be-hash.tdb1 b/lib/tdb2/test/jenkins-be-hash.tdb1
new file mode 100644
index 0000000000..b652840414
--- /dev/null
+++ b/lib/tdb2/test/jenkins-be-hash.tdb1
diff --git a/lib/tdb2/test/jenkins-le-hash.tdb1 b/lib/tdb2/test/jenkins-le-hash.tdb1
new file mode 100644
index 0000000000..007e0a3368
--- /dev/null
+++ b/lib/tdb2/test/jenkins-le-hash.tdb1
diff --git a/lib/tdb2/test/old-nohash-be.tdb1 b/lib/tdb2/test/old-nohash-be.tdb1
new file mode 100644
index 0000000000..1c49116c1d
--- /dev/null
+++ b/lib/tdb2/test/old-nohash-be.tdb1
diff --git a/lib/tdb2/test/old-nohash-le.tdb1 b/lib/tdb2/test/old-nohash-le.tdb1
new file mode 100644
index 0000000000..0655072d88
--- /dev/null
+++ b/lib/tdb2/test/old-nohash-le.tdb1
diff --git a/lib/tdb2/test/run-tdb1-3G-file.c b/lib/tdb2/test/run-tdb1-3G-file.c
new file mode 100644
index 0000000000..6509ca3ab7
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-3G-file.c
@@ -0,0 +1,118 @@
+/* We need this otherwise fcntl locking fails. */
+#define _FILE_OFFSET_BITS 64
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <err.h>
+#include "tdb1-logging.h"
+
+static int tdb1_expand_file_sparse(struct tdb1_context *tdb,
+				  tdb1_off_t size,
+				  tdb1_off_t addition)
+{
+	if (tdb->read_only || tdb->traverse_read) {
+		tdb->ecode = TDB1_ERR_RDONLY;
+		return -1;
+	}
+
+	if (ftruncate(tdb->fd, size+addition) == -1) {
+		char b = 0;
+		ssize_t written = pwrite(tdb->fd,  &b, 1, (size+addition) - 1);
+		if (written == 0) {
+			/* try once more, potentially revealing errno */
+			written = pwrite(tdb->fd,  &b, 1, (size+addition) - 1);
+		}
+		if (written == 0) {
+			/* again - give up, guessing errno */
+			errno = ENOSPC;
+		}
+		if (written != 1) {
+			TDB1_LOG((tdb, TDB1_DEBUG_FATAL, "expand_file to %d failed (%s)\n",
+				 size+addition, strerror(errno)));
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+static const struct tdb1_methods large_io_methods = {
+	tdb1_read,
+	tdb1_write,
+	tdb1_next_hash_chain,
+	tdb1_oob,
+	tdb1_expand_file_sparse
+};
+
+static int test_traverse(struct tdb1_context *tdb, TDB1_DATA key, TDB1_DATA data,
+			 void *_data)
+{
+	TDB1_DATA *expect = _data;
+	ok1(key.dsize == strlen("hi"));
+	ok1(memcmp(key.dptr, "hi", strlen("hi")) == 0);
+	ok1(data.dsize == expect->dsize);
+	ok1(memcmp(data.dptr, expect->dptr, data.dsize) == 0);
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	struct tdb1_context *tdb;
+	TDB1_DATA key, orig_data, data;
+	uint32_t hash;
+	tdb1_off_t rec_ptr;
+	struct tdb1_record rec;
+
+	plan_tests(24);
+	tdb = tdb1_open_ex("run-36-file.tdb", 1024, TDB1_CLEAR_IF_FIRST,
+			  O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
+
+	ok1(tdb);
+	tdb->methods = &large_io_methods;
+
+	/* Enlarge the file (internally multiplies by 2). */
+	ok1(tdb1_expand(tdb, 1500000000) == 0);
+
+	/* Put an entry in, and check it. */
+	key.dsize = strlen("hi");
+	key.dptr = (void *)"hi";
+	orig_data.dsize = strlen("world");
+	orig_data.dptr = (void *)"world";
+
+	ok1(tdb1_store(tdb, key, orig_data, TDB1_INSERT) == 0);
+
+	data = tdb1_fetch(tdb, key);
+	ok1(data.dsize == strlen("world"));
+	ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
+	free(data.dptr);
+
+	/* That currently fills at the end, make sure that's true. */
+	hash = tdb->hash_fn(&key);
+	rec_ptr = tdb1_find_lock_hash(tdb, key, hash, F_RDLCK, &rec);
+	ok1(rec_ptr);
+	ok1(rec_ptr > 2U*1024*1024*1024);
+	tdb1_unlock(tdb, TDB1_BUCKET(rec.full_hash), F_RDLCK);
+
+	/* Traverse must work. */
+	ok1(tdb1_traverse(tdb, test_traverse, &orig_data) == 1);
+
+	/* Delete should work. */
+	ok1(tdb1_delete(tdb, key) == 0);
+
+	ok1(tdb1_traverse(tdb, test_traverse, NULL) == 0);
+
+	/* Transactions should work. */
+	ok1(tdb1_transaction_start(tdb) == 0);
+	ok1(tdb1_store(tdb, key, orig_data, TDB1_INSERT) == 0);
+
+	data = tdb1_fetch(tdb, key);
+	ok1(data.dsize == strlen("world"));
+	ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
+	free(data.dptr);
+	ok1(tdb1_transaction_commit(tdb) == 0);
+
+	ok1(tdb1_traverse(tdb, test_traverse, &orig_data) == 1);
+	tdb1_close(tdb);
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1-bad-tdb-header.c b/lib/tdb2/test/run-tdb1-bad-tdb-header.c
new file mode 100644
index 0000000000..9e23e97970
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-bad-tdb-header.c
@@ -0,0 +1,49 @@
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <err.h>
+#include "tdb1-logging.h"
+
+int main(int argc, char *argv[])
+{
+	struct tdb1_context *tdb;
+	struct tdb1_header hdr;
+	int fd;
+
+	plan_tests(11);
+	/* Can open fine if complete crap, as long as O_CREAT. */
+	fd = open("run-bad-tdb-header.tdb", O_RDWR|O_CREAT|O_TRUNC, 0600);
+	ok1(fd >= 0);
+	ok1(write(fd, "hello world", 11) == 11);
+	close(fd);
+	tdb = tdb1_open_ex("run-bad-tdb-header.tdb", 1024, 0, O_RDWR, 0,
+			  &taplogctx, NULL);
+	ok1(!tdb);
+	tdb = tdb1_open_ex("run-bad-tdb-header.tdb", 1024, 0, O_CREAT|O_RDWR,
+			  0600, &taplogctx, NULL);
+	ok1(tdb);
+	tdb1_close(tdb);
+
+	/* Now, with wrong version it should *not* overwrite. */
+	fd = open("run-bad-tdb-header.tdb", O_RDWR);
+	ok1(fd >= 0);
+	ok1(read(fd, &hdr, sizeof(hdr)) == sizeof(hdr));
+	ok1(hdr.version == TDB1_VERSION);
+	hdr.version++;
+	lseek(fd, 0, SEEK_SET);
+	ok1(write(fd, &hdr, sizeof(hdr)) == sizeof(hdr));
+	close(fd);
+
+	tdb = tdb1_open_ex("run-bad-tdb-header.tdb", 1024, 0, O_RDWR|O_CREAT,
+			  0600, &taplogctx, NULL);
+	ok1(errno == EIO);
+	ok1(!tdb);
+
+	/* With truncate, will be fine. */
+	tdb = tdb1_open_ex("run-bad-tdb-header.tdb", 1024, 0,
+			  O_RDWR|O_CREAT|O_TRUNC, 0600, &taplogctx, NULL);
+	ok1(tdb);
+	tdb1_close(tdb);
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1-check.c b/lib/tdb2/test/run-tdb1-check.c
new file mode 100644
index 0000000000..03b0191a17
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-check.c
@@ -0,0 +1,55 @@
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <err.h>
+#include "tdb1-logging.h"
+
+int main(int argc, char *argv[])
+{
+	struct tdb1_context *tdb;
+	TDB1_DATA key, data;
+
+	plan_tests(13);
+	tdb = tdb1_open_ex("run-check.tdb", 1, TDB1_CLEAR_IF_FIRST,
+			  O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
+
+	ok1(tdb);
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+
+	key.dsize = strlen("hi");
+	key.dptr = (void *)"hi";
+	data.dsize = strlen("world");
+	data.dptr = (void *)"world";
+
+	ok1(tdb1_store(tdb, key, data, TDB1_INSERT) == 0);
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+	tdb1_close(tdb);
+
+	tdb = tdb1_open_ex("run-check.tdb", 1024, 0, O_RDWR, 0,
+			  &taplogctx, NULL);
+	ok1(tdb);
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+	tdb1_close(tdb);
+
+	tdb = tdb1_open_ex("test/tdb1.corrupt", 1024, 0, O_RDWR, 0,
+			  &taplogctx, NULL);
+	ok1(tdb);
+	ok1(tdb1_check(tdb, NULL, NULL) == -1);
+	ok1(tdb1_error(tdb) == TDB1_ERR_CORRUPT);
+	tdb1_close(tdb);
+
+	/* Big and little endian should work! */
+	tdb = tdb1_open_ex("test/old-nohash-le.tdb1", 1024, 0, O_RDWR, 0,
+			  &taplogctx, NULL);
+	ok1(tdb);
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+	tdb1_close(tdb);
+
+	tdb = tdb1_open_ex("test/old-nohash-be.tdb1", 1024, 0, O_RDWR, 0,
+			  &taplogctx, NULL);
+	ok1(tdb);
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+	tdb1_close(tdb);
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1-corrupt.c b/lib/tdb2/test/run-tdb1-corrupt.c
new file mode 100644
index 0000000000..b2dcafadc0
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-corrupt.c
@@ -0,0 +1,118 @@
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <err.h>
+#include "tdb1-logging.h"
+
+static int check(TDB1_DATA key, TDB1_DATA data, void *private)
+{
+	unsigned int *sizes = private;
+
+	if (key.dsize > strlen("hello"))
+		return -1;
+	if (memcmp(key.dptr, "hello", key.dsize) != 0)
+		return -1;
+
+	if (data.dsize != strlen("world"))
+		return -1;
+	if (memcmp(data.dptr, "world", data.dsize) != 0)
+		return -1;
+
+	sizes[0] += key.dsize;
+	sizes[1] += data.dsize;
+	return 0;
+}
+
+static void tdb1_flip_bit(struct tdb1_context *tdb, unsigned int bit)
+{
+	unsigned int off = bit / CHAR_BIT;
+	unsigned char mask = (1 << (bit % CHAR_BIT));
+
+	if (tdb->map_ptr)
+		((unsigned char *)tdb->map_ptr)[off] ^= mask;
+	else {
+		unsigned char c;
+		if (pread(tdb->fd, &c, 1, off) != 1)
+			err(1, "pread");
+		c ^= mask;
+		if (pwrite(tdb->fd, &c, 1, off) != 1)
+			err(1, "pwrite");
+	}
+}
+
+static void check_test(struct tdb1_context *tdb)
+{
+	TDB1_DATA key, data;
+	unsigned int i, verifiable, corrupt, sizes[2], dsize, ksize;
+
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+
+	key.dptr = (void *)"hello";
+	data.dsize = strlen("world");
+	data.dptr = (void *)"world";
+
+	/* Key and data size respectively. */
+	dsize = ksize = 0;
+
+	/* 5 keys in hash size 2 means we'll have multichains. */
+	for (key.dsize = 1; key.dsize <= 5; key.dsize++) {
+		ksize += key.dsize;
+		dsize += data.dsize;
+		if (tdb1_store(tdb, key, data, TDB1_INSERT) != 0)
+			abort();
+	}
+
+	/* This is how many bytes we expect to be verifiable. */
+	/* From the file header. */
+	verifiable = strlen(TDB1_MAGIC_FOOD) + 1
+		+ 2 * sizeof(uint32_t) + 2 * sizeof(tdb1_off_t)
+		+ 2 * sizeof(uint32_t);
+	/* From the free list chain and hash chains. */
+	verifiable += 3 * sizeof(tdb1_off_t);
+	/* From the record headers & tailer */
+	verifiable += 5 * (sizeof(struct tdb1_record) + sizeof(uint32_t));
+	/* The free block: we ignore datalen, keylen, full_hash. */
+	verifiable += sizeof(struct tdb1_record) - 3*sizeof(uint32_t) +
+		sizeof(uint32_t);
+	/* Our check function verifies the key and data. */
+	verifiable += ksize + dsize;
+
+	/* Flip one bit at a time, make sure it detects verifiable bytes. */
+	for (i = 0, corrupt = 0; i < tdb->map_size * CHAR_BIT; i++) {
+		tdb1_flip_bit(tdb, i);
+		memset(sizes, 0, sizeof(sizes));
+		if (tdb1_check(tdb, check, sizes) != 0)
+			corrupt++;
+		else if (sizes[0] != ksize || sizes[1] != dsize)
+			corrupt++;
+		tdb1_flip_bit(tdb, i);
+	}
+	ok(corrupt == verifiable * CHAR_BIT, "corrupt %u should be %u",
+	   corrupt, verifiable * CHAR_BIT);
+}
+
+int main(int argc, char *argv[])
+{
+	struct tdb1_context *tdb;
+
+	plan_tests(4);
+	/* This should use mmap. */
+	tdb = tdb1_open_ex("run-corrupt.tdb", 2, TDB1_CLEAR_IF_FIRST,
+			  O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
+
+	if (!tdb)
+		abort();
+	check_test(tdb);
+	tdb1_close(tdb);
+
+	/* This should not. */
+	tdb = tdb1_open_ex("run-corrupt.tdb", 2, TDB1_CLEAR_IF_FIRST|TDB1_NOMMAP,
+			  O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
+
+	if (!tdb)
+		abort();
+	check_test(tdb);
+	tdb1_close(tdb);
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1-die-during-transaction.c b/lib/tdb2/test/run-tdb1-die-during-transaction.c
new file mode 100644
index 0000000000..ae03d5f8b9
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-die-during-transaction.c
@@ -0,0 +1,215 @@
+#include <ccan/tdb2/private.h>
+#include <unistd.h>
+#include "tdb1-lock-tracking.h"
+static ssize_t pwrite_check(int fd, const void *buf, size_t count, off_t offset);
+static ssize_t write_check(int fd, const void *buf, size_t count);
+static int ftruncate_check(int fd, off_t length);
+
+#define pwrite pwrite_check
+#define write write_check
+#define fcntl fcntl_with_lockcheck1
+#define ftruncate ftruncate_check
+
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <stdarg.h>
+#include <err.h>
+#include <setjmp.h>
+#include "tdb1-external-agent.h"
+#include "tdb1-logging.h"
+
+#undef write
+#undef pwrite
+#undef fcntl
+#undef ftruncate
+
+static bool in_transaction;
+static int target, current;
+static jmp_buf jmpbuf;
+#define TEST_DBNAME "run-die-during-transaction.tdb"
+#define KEY_STRING "helloworld"
+
+static void maybe_die(int fd)
+{
+	if (in_transaction && current++ == target) {
+		longjmp(jmpbuf, 1);
+	}
+}
+
+static ssize_t pwrite_check(int fd,
+			    const void *buf, size_t count, off_t offset)
+{
+	ssize_t ret;
+
+	maybe_die(fd);
+
+	ret = pwrite(fd, buf, count, offset);
+	if (ret != count)
+		return ret;
+
+	maybe_die(fd);
+	return ret;
+}
+
+static ssize_t write_check(int fd, const void *buf, size_t count)
+{
+	ssize_t ret;
+
+	maybe_die(fd);
+
+	ret = write(fd, buf, count);
+	if (ret != count)
+		return ret;
+
+	maybe_die(fd);
+	return ret;
+}
+
+static int ftruncate_check(int fd, off_t length)
+{
+	int ret;
+
+	maybe_die(fd);
+
+	ret = ftruncate(fd, length);
+
+	maybe_die(fd);
+	return ret;
+}
+
+static bool test_death(enum operation op, struct agent *agent)
+{
+	struct tdb1_context *tdb = NULL;
+	TDB1_DATA key;
+	enum agent_return ret;
+	int needed_recovery = 0;
+
+	current = target = 0;
+reset:
+	unlink(TEST_DBNAME);
+	tdb = tdb1_open_ex(TEST_DBNAME, 1024, TDB1_NOMMAP,
+			  O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
+
+	if (setjmp(jmpbuf) != 0) {
+		/* We're partway through.  Simulate our death. */
+		close(tdb->fd);
+		forget_locking1();
+		in_transaction = false;
+
+		ret = external_agent_operation1(agent, NEEDS_RECOVERY, "");
+		if (ret == SUCCESS)
+			needed_recovery++;
+		else if (ret != FAILED) {
+			diag("Step %u agent NEEDS_RECOVERY = %s", current,
+			     agent_return_name1(ret));
+			return false;
+		}
+
+		ret = external_agent_operation1(agent, op, KEY_STRING);
+		if (ret != SUCCESS) {
+			diag("Step %u op %s failed = %s", current,
+			     operation_name1(op),
+			     agent_return_name1(ret));
+			return false;
+		}
+
+		ret = external_agent_operation1(agent, NEEDS_RECOVERY, "");
+		if (ret != FAILED) {
+			diag("Still needs recovery after step %u = %s",
+			     current, agent_return_name1(ret));
+			return false;
+		}
+
+		ret = external_agent_operation1(agent, CHECK, "");
+		if (ret != SUCCESS) {
+			diag("Step %u check failed = %s", current,
+			     agent_return_name1(ret));
+			return false;
+		}
+
+		ret = external_agent_operation1(agent, CLOSE, "");
+		if (ret != SUCCESS) {
+			diag("Step %u close failed = %s", current,
+			     agent_return_name1(ret));
+			return false;
+		}
+
+		/* Suppress logging as this tries to use closed fd. */
+		suppress_logging = true;
+		suppress_lockcheck1 = true;
+		tdb1_close(tdb);
+		suppress_logging = false;
+		suppress_lockcheck1 = false;
+		target++;
+		current = 0;
+		goto reset;
+	}
+
+	/* Put key for agent to fetch. */
+	key.dsize = strlen(KEY_STRING);
+	key.dptr = (void *)KEY_STRING;
+	if (tdb1_store(tdb, key, key, TDB1_INSERT) != 0)
+		return false;
+
+	/* This is the key we insert in transaction. */
+	key.dsize--;
+
+	ret = external_agent_operation1(agent, OPEN, TEST_DBNAME);
+	if (ret != SUCCESS)
+		errx(1, "Agent failed to open: %s", agent_return_name1(ret));
+
+	ret = external_agent_operation1(agent, FETCH, KEY_STRING);
+	if (ret != SUCCESS)
+		errx(1, "Agent failed find key: %s", agent_return_name1(ret));
+
+	in_transaction = true;
+	if (tdb1_transaction_start(tdb) != 0)
+		return false;
+
+	if (tdb1_store(tdb, key, key, TDB1_INSERT) != 0)
+		return false;
+
+	if (tdb1_transaction_commit(tdb) != 0)
+		return false;
+
+	in_transaction = false;
+
+	/* We made it! */
+	diag("Completed %u runs", current);
+	tdb1_close(tdb);
+	ret = external_agent_operation1(agent, CLOSE, "");
+	if (ret != SUCCESS) {
+		diag("Step %u close failed = %s", current,
+		     agent_return_name1(ret));
+		return false;
+	}
+
+	ok1(needed_recovery);
+	ok1(locking_errors1 == 0);
+	ok1(forget_locking1() == 0);
+	locking_errors1 = 0;
+	return true;
+}
+
+int main(int argc, char *argv[])
+{
+	enum operation ops[] = { FETCH, STORE, TRANSACTION_START };
+	struct agent *agent;
+	int i;
+
+	plan_tests(12);
+	unlock_callback1 = maybe_die;
+
+	agent = prepare_external_agent1();
+	if (!agent)
+		err(1, "preparing agent");
+
+	for (i = 0; i < sizeof(ops)/sizeof(ops[0]); i++) {
+		diag("Testing %s after death", operation_name1(ops[i]));
+		ok1(test_death(ops[i], agent));
+	}
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1-endian.c b/lib/tdb2/test/run-tdb1-endian.c
new file mode 100644
index 0000000000..1a01de17ab
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-endian.c
@@ -0,0 +1,54 @@
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <err.h>
+#include "tdb1-logging.h"
+
+int main(int argc, char *argv[])
+{
+	struct tdb1_context *tdb;
+	TDB1_DATA key, data;
+
+	plan_tests(13);
+	tdb = tdb1_open_ex("run-endian.tdb", 1024,
+			  TDB1_CLEAR_IF_FIRST|TDB1_CONVERT,
+			  O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
+
+	ok1(tdb);
+	key.dsize = strlen("hi");
+	key.dptr = (void *)"hi";
+	data.dsize = strlen("world");
+	data.dptr = (void *)"world";
+
+	ok1(tdb1_store(tdb, key, data, TDB1_MODIFY) < 0);
+	ok1(tdb1_error(tdb) == TDB1_ERR_NOEXIST);
+	ok1(tdb1_store(tdb, key, data, TDB1_INSERT) == 0);
+	ok1(tdb1_store(tdb, key, data, TDB1_INSERT) < 0);
+	ok1(tdb1_error(tdb) == TDB1_ERR_EXISTS);
+	ok1(tdb1_store(tdb, key, data, TDB1_MODIFY) == 0);
+
+	data = tdb1_fetch(tdb, key);
+	ok1(data.dsize == strlen("world"));
+	ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
+	free(data.dptr);
+
+	key.dsize++;
+	data = tdb1_fetch(tdb, key);
+	ok1(data.dptr == NULL);
+	tdb1_close(tdb);
+
+	/* Reopen: should read it */
+	tdb = tdb1_open_ex("run-endian.tdb", 1024, 0, O_RDWR, 0,
+			  &taplogctx, NULL);
+	ok1(tdb);
+
+	key.dsize = strlen("hi");
+	key.dptr = (void *)"hi";
+	data = tdb1_fetch(tdb, key);
+	ok1(data.dsize == strlen("world"));
+	ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
+	free(data.dptr);
+	tdb1_close(tdb);
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1-incompatible.c b/lib/tdb2/test/run-tdb1-incompatible.c
new file mode 100644
index 0000000000..ed3181a9b5
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-incompatible.c
@@ -0,0 +1,178 @@
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <err.h>
+
+static unsigned int tdb1_dumb_hash(TDB1_DATA *key)
+{
+	return key->dsize;
+}
+
+static void log_fn(struct tdb1_context *tdb, enum tdb1_debug_level level, const char *fmt, ...)
+{
+	unsigned int *count = tdb1_get_logging_private(tdb);
+	if (strstr(fmt, "hash"))
+		(*count)++;
+}
+
+static unsigned int hdr_rwlocks(const char *fname)
+{
+	struct tdb1_header hdr;
+
+	int fd = open(fname, O_RDONLY);
+	if (fd == -1)
+		return -1;
+
+	if (read(fd, &hdr, sizeof(hdr)) != sizeof(hdr))
+		return -1;
+
+	close(fd);
+	return hdr.rwlocks;
+}
+
+int main(int argc, char *argv[])
+{
+	struct tdb1_context *tdb;
+	unsigned int log_count, flags;
+	TDB1_DATA d;
+	struct tdb1_logging_context log_ctx = { log_fn, &log_count };
+
+	plan_tests(38 * 2);
+
+	for (flags = 0; flags <= TDB1_CONVERT; flags += TDB1_CONVERT) {
+		unsigned int rwmagic = TDB1_HASH_RWLOCK_MAGIC;
+
+		if (flags & TDB1_CONVERT)
+			tdb1_convert(&rwmagic, sizeof(rwmagic));
+
+		/* Create an old-style hash. */
+		log_count = 0;
+		tdb = tdb1_open_ex("run-incompatible.tdb", 0, flags,
+				  O_CREAT|O_RDWR|O_TRUNC, 0600, &log_ctx,
+				  NULL);
+		ok1(tdb);
+		ok1(log_count == 0);
+		d.dptr = (void *)"Hello";
+		d.dsize = 5;
+		ok1(tdb1_store(tdb, d, d, TDB1_INSERT) == 0);
+		tdb1_close(tdb);
+
+		/* Should not have marked rwlocks field. */
+		ok1(hdr_rwlocks("run-incompatible.tdb") == 0);
+
+		/* We can still open any old-style with incompat flag. */
+		log_count = 0;
+		tdb = tdb1_open_ex("run-incompatible.tdb", 0,
+				  TDB1_INCOMPATIBLE_HASH,
+				  O_RDWR, 0600, &log_ctx, NULL);
+		ok1(tdb);
+		ok1(log_count == 0);
+		d = tdb1_fetch(tdb, d);
+		ok1(d.dsize == 5);
+		free(d.dptr);
+		ok1(tdb1_check(tdb, NULL, NULL) == 0);
+		tdb1_close(tdb);
+
+		log_count = 0;
+		tdb = tdb1_open_ex("test/jenkins-le-hash.tdb1", 0, 0, O_RDONLY,
+				  0, &log_ctx, tdb1_jenkins_hash);
+		ok1(tdb);
+		ok1(log_count == 0);
+		ok1(tdb1_check(tdb, NULL, NULL) == 0);
+		tdb1_close(tdb);
+
+		log_count = 0;
+		tdb = tdb1_open_ex("test/jenkins-be-hash.tdb1", 0, 0, O_RDONLY,
+				  0, &log_ctx, tdb1_jenkins_hash);
+		ok1(tdb);
+		ok1(log_count == 0);
+		ok1(tdb1_check(tdb, NULL, NULL) == 0);
+		tdb1_close(tdb);
+
+		/* OK, now create with incompatible flag, default hash. */
+		log_count = 0;
+		tdb = tdb1_open_ex("run-incompatible.tdb", 0,
+				  flags|TDB1_INCOMPATIBLE_HASH,
+				  O_CREAT|O_RDWR|O_TRUNC, 0600, &log_ctx,
+				  NULL);
+		ok1(tdb);
+		ok1(log_count == 0);
+		d.dptr = (void *)"Hello";
+		d.dsize = 5;
+		ok1(tdb1_store(tdb, d, d, TDB1_INSERT) == 0);
+		tdb1_close(tdb);
+
+		/* Should have marked rwlocks field. */
+		ok1(hdr_rwlocks("run-incompatible.tdb") == rwmagic);
+
+		/* Cannot open with old hash. */
+		log_count = 0;
+		tdb = tdb1_open_ex("run-incompatible.tdb", 0, 0,
+				  O_RDWR, 0600, &log_ctx, tdb1_old_hash);
+		ok1(!tdb);
+		ok1(log_count == 1);
+
+		/* Can open with jenkins hash. */
+		log_count = 0;
+		tdb = tdb1_open_ex("run-incompatible.tdb", 0, 0,
+				  O_RDWR, 0600, &log_ctx, tdb1_jenkins_hash);
+		ok1(tdb);
+		ok1(log_count == 0);
+		d = tdb1_fetch(tdb, d);
+		ok1(d.dsize == 5);
+		free(d.dptr);
+		ok1(tdb1_check(tdb, NULL, NULL) == 0);
+		tdb1_close(tdb);
+
+		/* Can open by letting it figure it out itself. */
+		log_count = 0;
+		tdb = tdb1_open_ex("run-incompatible.tdb", 0, 0,
+				  O_RDWR, 0600, &log_ctx, NULL);
+		ok1(tdb);
+		ok1(log_count == 0);
+		d.dptr = (void *)"Hello";
+		d.dsize = 5;
+		d = tdb1_fetch(tdb, d);
+		ok1(d.dsize == 5);
+		free(d.dptr);
+		ok1(tdb1_check(tdb, NULL, NULL) == 0);
+		tdb1_close(tdb);
+
+		/* We can also use incompatible hash with other hashes. */
+		log_count = 0;
+		tdb = tdb1_open_ex("run-incompatible.tdb", 0,
+				  flags|TDB1_INCOMPATIBLE_HASH,
+				  O_CREAT|O_RDWR|O_TRUNC, 0600, &log_ctx,
+				  tdb1_dumb_hash);
+		ok1(tdb);
+		ok1(log_count == 0);
+		d.dptr = (void *)"Hello";
+		d.dsize = 5;
+		ok1(tdb1_store(tdb, d, d, TDB1_INSERT) == 0);
+		tdb1_close(tdb);
+
+		/* Should have marked rwlocks field. */
+		ok1(hdr_rwlocks("run-incompatible.tdb") == rwmagic);
+
+		/* It should not open if we don't specify. */
+		log_count = 0;
+		tdb = tdb1_open_ex("run-incompatible.tdb", 0, 0, O_RDWR, 0,
+				  &log_ctx, NULL);
+		ok1(!tdb);
+		ok1(log_count == 1);
+
+		/* Should reopen with correct hash. */
+		log_count = 0;
+		tdb = tdb1_open_ex("run-incompatible.tdb", 0, 0, O_RDWR, 0,
+				  &log_ctx, tdb1_dumb_hash);
+		ok1(tdb);
+		ok1(log_count == 0);
+		d = tdb1_fetch(tdb, d);
+		ok1(d.dsize == 5);
+		free(d.dptr);
+		ok1(tdb1_check(tdb, NULL, NULL) == 0);
+		tdb1_close(tdb);
+	}
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1-nested-transactions.c b/lib/tdb2/test/run-tdb1-nested-transactions.c
new file mode 100644
index 0000000000..2518003c63
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-nested-transactions.c
@@ -0,0 +1,68 @@
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <err.h>
+#include "tdb1-logging.h"
+
+int main(int argc, char *argv[])
+{
+	struct tdb1_context *tdb;
+	TDB1_DATA key, data;
+
+	plan_tests(27);
+	key.dsize = strlen("hi");
+	key.dptr = (void *)"hi";
+
+	tdb = tdb1_open_ex("run-nested-transactions.tdb",
+			  1024, TDB1_CLEAR_IF_FIRST|TDB1_DISALLOW_NESTING,
+			  O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
+	ok1(tdb);
+
+	ok1(tdb1_transaction_start(tdb) == 0);
+	data.dptr = (void *)"world";
+	data.dsize = strlen("world");
+	ok1(tdb1_store(tdb, key, data, TDB1_INSERT) == 0);
+	data = tdb1_fetch(tdb, key);
+	ok1(data.dsize == strlen("world"));
+	ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
+	free(data.dptr);
+	ok1(tdb1_transaction_start(tdb) != 0);
+	ok1(tdb1_error(tdb) == TDB1_ERR_NESTING);
+
+	data = tdb1_fetch(tdb, key);
+	ok1(data.dsize == strlen("world"));
+	ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
+	free(data.dptr);
+	ok1(tdb1_transaction_commit(tdb) == 0);
+	data = tdb1_fetch(tdb, key);
+	ok1(data.dsize == strlen("world"));
+	ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
+	free(data.dptr);
+	tdb1_close(tdb);
+
+	/* Allow nesting by default. */
+	tdb = tdb1_open_ex("run-nested-transactions.tdb",
+			  1024, TDB1_DEFAULT, O_RDWR, 0, &taplogctx, NULL);
+	ok1(tdb);
+
+	ok1(tdb1_transaction_start(tdb) == 0);
+	ok1(tdb1_transaction_start(tdb) == 0);
+	ok1(tdb1_delete(tdb, key) == 0);
+	ok1(tdb1_transaction_commit(tdb) == 0);
+	ok1(!tdb1_exists(tdb, key));
+	ok1(tdb1_transaction_cancel(tdb) == 0);
+	/* Surprise! Kills inner "committed" transaction. */
+	ok1(tdb1_exists(tdb, key));
+
+	ok1(tdb1_transaction_start(tdb) == 0);
+	ok1(tdb1_transaction_start(tdb) == 0);
+	ok1(tdb1_delete(tdb, key) == 0);
+	ok1(tdb1_transaction_commit(tdb) == 0);
+	ok1(!tdb1_exists(tdb, key));
+	ok1(tdb1_transaction_commit(tdb) == 0);
+	ok1(!tdb1_exists(tdb, key));
+	tdb1_close(tdb);
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1-nested-traverse.c b/lib/tdb2/test/run-tdb1-nested-traverse.c
new file mode 100644
index 0000000000..b6f6ac63d9
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-nested-traverse.c
@@ -0,0 +1,80 @@
+#include "tdb1-lock-tracking.h"
+#define fcntl fcntl_with_lockcheck1
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#undef fcntl
+#include <stdlib.h>
+#include <stdbool.h>
+#include <err.h>
+#include "tdb1-external-agent.h"
+#include "tdb1-logging.h"
+
+static struct agent *agent;
+
+static bool correct_key(TDB1_DATA key)
+{
+	return key.dsize == strlen("hi")
+		&& memcmp(key.dptr, "hi", key.dsize) == 0;
+}
+
+static bool correct_data(TDB1_DATA data)
+{
+	return data.dsize == strlen("world")
+		&& memcmp(data.dptr, "world", data.dsize) == 0;
+}
+
+static int traverse2(struct tdb1_context *tdb, TDB1_DATA key, TDB1_DATA data,
+		     void *p)
+{
+	ok1(correct_key(key));
+	ok1(correct_data(data));
+	return 0;
+}
+
+static int traverse1(struct tdb1_context *tdb, TDB1_DATA key, TDB1_DATA data,
+		     void *p)
+{
+	ok1(correct_key(key));
+	ok1(correct_data(data));
+	ok1(external_agent_operation1(agent, TRANSACTION_START, tdb1_name(tdb))
+	    == WOULD_HAVE_BLOCKED);
+	tdb1_traverse(tdb, traverse2, NULL);
+
+	/* That should *not* release the transaction lock! */
+	ok1(external_agent_operation1(agent, TRANSACTION_START, tdb1_name(tdb))
+	    == WOULD_HAVE_BLOCKED);
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	struct tdb1_context *tdb;
+	TDB1_DATA key, data;
+
+	plan_tests(17);
+	agent = prepare_external_agent1();
+	if (!agent)
+		err(1, "preparing agent");
+
+	tdb = tdb1_open_ex("run-nested-traverse.tdb", 1024, TDB1_CLEAR_IF_FIRST,
+			  O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
+	ok1(tdb);
+
+	ok1(external_agent_operation1(agent, OPEN, tdb1_name(tdb)) == SUCCESS);
+	ok1(external_agent_operation1(agent, TRANSACTION_START, tdb1_name(tdb))
+	    == SUCCESS);
+	ok1(external_agent_operation1(agent, TRANSACTION_COMMIT, tdb1_name(tdb))
+	    == SUCCESS);
+
+	key.dsize = strlen("hi");
+	key.dptr = (void *)"hi";
+	data.dptr = (void *)"world";
+	data.dsize = strlen("world");
+
+	ok1(tdb1_store(tdb, key, data, TDB1_INSERT) == 0);
+	tdb1_traverse(tdb, traverse1, NULL);
+	tdb1_traverse_read(tdb, traverse1, NULL);
+	tdb1_close(tdb);
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1-no-lock-during-traverse.c b/lib/tdb2/test/run-tdb1-no-lock-during-traverse.c
new file mode 100644
index 0000000000..570562991d
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-no-lock-during-traverse.c
@@ -0,0 +1,106 @@
+#include <ccan/tdb2/private.h>
+#include <unistd.h>
+#include "tdb1-lock-tracking.h"
+
+#define fcntl fcntl_with_lockcheck1
+
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <err.h>
+#include "tdb1-logging.h"
+
+#undef fcntl
+
+#define NUM_ENTRIES 10
+
+static bool prepare_entries(struct tdb1_context *tdb)
+{
+	unsigned int i;
+	TDB1_DATA key, data;
+
+	for (i = 0; i < NUM_ENTRIES; i++) {
+		key.dsize = sizeof(i);
+		key.dptr = (void *)&i;
+		data.dsize = strlen("world");
+		data.dptr = (void *)"world";
+
+		if (tdb1_store(tdb, key, data, 0) != 0)
+			return false;
+	}
+	return true;
+}
+
+static void delete_entries(struct tdb1_context *tdb)
+{
+	unsigned int i;
+	TDB1_DATA key;
+
+	for (i = 0; i < NUM_ENTRIES; i++) {
+		key.dsize = sizeof(i);
+		key.dptr = (void *)&i;
+
+		ok1(tdb1_delete(tdb, key) == 0);
+	}
+}
+
+/* We don't know how many times this will run. */
+static int delete_other(struct tdb1_context *tdb, TDB1_DATA key, TDB1_DATA data,
+			void *private_data)
+{
+	unsigned int i;
+	memcpy(&i, key.dptr, 4);
+	i = (i + 1) % NUM_ENTRIES;
+	key.dptr = (void *)&i;
+	if (tdb1_delete(tdb, key) != 0)
+		(*(int *)private_data)++;
+	return 0;
+}
+
+static int delete_self(struct tdb1_context *tdb, TDB1_DATA key, TDB1_DATA data,
+			void *private_data)
+{
+	ok1(tdb1_delete(tdb, key) == 0);
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	struct tdb1_context *tdb;
+	int errors = 0;
+
+	plan_tests(41);
+	tdb = tdb1_open_ex("run-no-lock-during-traverse.tdb",
+			  1024, TDB1_CLEAR_IF_FIRST, O_CREAT|O_TRUNC|O_RDWR,
+			  0600, &taplogctx, NULL);
+
+	ok1(tdb);
+	ok1(prepare_entries(tdb));
+	ok1(locking_errors1 == 0);
+	ok1(tdb1_lockall(tdb) == 0);
+	ok1(locking_errors1 == 0);
+	tdb1_traverse(tdb, delete_other, &errors);
+	ok1(errors == 0);
+	ok1(locking_errors1 == 0);
+	ok1(tdb1_unlockall(tdb) == 0);
+
+	ok1(prepare_entries(tdb));
+	ok1(locking_errors1 == 0);
+	ok1(tdb1_lockall(tdb) == 0);
+	ok1(locking_errors1 == 0);
+	tdb1_traverse(tdb, delete_self, NULL);
+	ok1(locking_errors1 == 0);
+	ok1(tdb1_unlockall(tdb) == 0);
+
+	ok1(prepare_entries(tdb));
+	ok1(locking_errors1 == 0);
+	ok1(tdb1_lockall(tdb) == 0);
+	ok1(locking_errors1 == 0);
+	delete_entries(tdb);
+	ok1(locking_errors1 == 0);
+	ok1(tdb1_unlockall(tdb) == 0);
+
+	ok1(tdb1_close(tdb) == 0);
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1-oldhash.c b/lib/tdb2/test/run-tdb1-oldhash.c
new file mode 100644
index 0000000000..32b4200d54
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-oldhash.c
@@ -0,0 +1,40 @@
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <err.h>
+#include "tdb1-logging.h"
+
+int main(int argc, char *argv[])
+{
+	struct tdb1_context *tdb;
+
+	plan_tests(8);
+
+	/* Old format (with zeroes in the hash magic fields) should
+	 * open with any hash (since we don't know what hash they used). */
+	tdb = tdb1_open_ex("test/old-nohash-le.tdb1", 0, 0, O_RDWR, 0,
+			  &taplogctx, NULL);
+	ok1(tdb);
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+	tdb1_close(tdb);
+
+	tdb = tdb1_open_ex("test/old-nohash-be.tdb1", 0, 0, O_RDWR, 0,
+			  &taplogctx, NULL);
+	ok1(tdb);
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+	tdb1_close(tdb);
+
+	tdb = tdb1_open_ex("test/old-nohash-le.tdb1", 0, 0, O_RDWR, 0,
+			  &taplogctx, tdb1_jenkins_hash);
+	ok1(tdb);
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+	tdb1_close(tdb);
+
+	tdb = tdb1_open_ex("test/old-nohash-be.tdb1", 0, 0, O_RDWR, 0,
+			  &taplogctx, tdb1_jenkins_hash);
+	ok1(tdb);
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+	tdb1_close(tdb);
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1-open-during-transaction.c b/lib/tdb2/test/run-tdb1-open-during-transaction.c
new file mode 100644
index 0000000000..7b22320a73
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-open-during-transaction.c
@@ -0,0 +1,176 @@
+#include "config.h"
+#include "tdb1-lock-tracking.h"
+#include <unistd.h>
+
+static ssize_t pwrite_check(int fd, const void *buf, size_t count, off_t offset);
+static ssize_t write_check(int fd, const void *buf, size_t count);
+static int ftruncate_check(int fd, off_t length);
+
+#define pwrite pwrite_check
+#define write write_check
+#define fcntl fcntl_with_lockcheck1
+#define ftruncate ftruncate_check
+
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <stdarg.h>
+#include <err.h>
+#include "tdb1-external-agent.h"
+#include "tdb1-logging.h"
+
+static struct agent *agent;
+static bool opened;
+static int errors = 0;
+static bool clear_if_first;
+#define TEST_DBNAME "run-open-during-transaction.tdb"
+
+#undef write
+#undef pwrite
+#undef fcntl
+#undef ftruncate
+
+static bool is_same(const char *snapshot, const char *latest, off_t len)
+{
+	unsigned i;
+
+	for (i = 0; i < len; i++) {
+		if (snapshot[i] != latest[i])
+			return false;
+	}
+	return true;
+}
+
+static bool compare_file(int fd, const char *snapshot, off_t snapshot_len)
+{
+	char *contents;
+	bool same;
+
+	/* over-length read serves as length check. */
+	contents = malloc(snapshot_len+1);
+	same = pread(fd, contents, snapshot_len+1, 0) == snapshot_len
+		&& is_same(snapshot, contents, snapshot_len);
+	free(contents);
+	return same;
+}
+
+static void check_file_intact(int fd)
+{
+	enum agent_return ret;
+	struct stat st;
+	char *contents;
+
+	fstat(fd, &st);
+	contents = malloc(st.st_size);
+	if (pread(fd, contents, st.st_size, 0) != st.st_size) {
+		diag("Read fail");
+		errors++;
+		return;
+	}
+
+	/* Ask agent to open file. */
+	ret = external_agent_operation1(agent, clear_if_first ?
+				       OPEN_WITH_CLEAR_IF_FIRST :
+				       OPEN,
+				       TEST_DBNAME);
+
+	/* It's OK to open it, but it must not have changed! */
+	if (!compare_file(fd, contents, st.st_size)) {
+		diag("Agent changed file after opening %s",
+		     agent_return_name1(ret));
+		errors++;
+	}
+
+	if (ret == SUCCESS) {
+		ret = external_agent_operation1(agent, CLOSE, NULL);
+		if (ret != SUCCESS) {
+			diag("Agent failed to close tdb: %s",
+			     agent_return_name1(ret));
+			errors++;
+		}
+	} else if (ret != WOULD_HAVE_BLOCKED) {
+		diag("Agent opening file gave %s",
+		     agent_return_name1(ret));
+		errors++;
+	}
+
+	free(contents);
+}
+
+static void after_unlock(int fd)
+{
+	if (opened)
+		check_file_intact(fd);
+}
+
+static ssize_t pwrite_check(int fd,
+			    const void *buf, size_t count, off_t offset)
+{
+	if (opened)
+		check_file_intact(fd);
+
+	return pwrite(fd, buf, count, offset);
+}
+
+static ssize_t write_check(int fd, const void *buf, size_t count)
+{
+	if (opened)
+		check_file_intact(fd);
+
+	return write(fd, buf, count);
+}
+
+static int ftruncate_check(int fd, off_t length)
+{
+	if (opened)
+		check_file_intact(fd);
+
+	return ftruncate(fd, length);
+
+}
+
+int main(int argc, char *argv[])
+{
+	const int flags[] = { TDB1_DEFAULT,
+			      TDB1_CLEAR_IF_FIRST,
+			      TDB1_NOMMAP,
+			      TDB1_CLEAR_IF_FIRST | TDB1_NOMMAP };
+	int i;
+	struct tdb1_context *tdb;
+	TDB1_DATA key, data;
+
+	plan_tests(20);
+	agent = prepare_external_agent1();
+	if (!agent)
+		err(1, "preparing agent");
+
+	unlock_callback1 = after_unlock;
+	for (i = 0; i < sizeof(flags)/sizeof(flags[0]); i++) {
+		clear_if_first = (flags[i] & TDB1_CLEAR_IF_FIRST);
+		diag("Test with %s and %s\n",
+		     clear_if_first ? "CLEAR" : "DEFAULT",
+		     (flags[i] & TDB1_NOMMAP) ? "no mmap" : "mmap");
+		unlink(TEST_DBNAME);
+		tdb = tdb1_open_ex(TEST_DBNAME, 1024, flags[i],
+				  O_CREAT|O_TRUNC|O_RDWR, 0600,
+				  &taplogctx, NULL);
+		ok1(tdb);
+
+		opened = true;
+		ok1(tdb1_transaction_start(tdb) == 0);
+		key.dsize = strlen("hi");
+		key.dptr = (void *)"hi";
+		data.dptr = (void *)"world";
+		data.dsize = strlen("world");
+
+		ok1(tdb1_store(tdb, key, data, TDB1_INSERT) == 0);
+		ok1(tdb1_transaction_commit(tdb) == 0);
+		ok(!errors, "We had %u open errors", errors);
+
+		opened = false;
+		tdb1_close(tdb);
+	}
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1-readonly-check.c b/lib/tdb2/test/run-tdb1-readonly-check.c
new file mode 100644
index 0000000000..2c06ca92ee
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-readonly-check.c
@@ -0,0 +1,43 @@
+/* We should be able to tdb1_check a O_RDONLY tdb, and we were previously allowed
+ * to tdb1_check() inside a transaction (though that's paranoia!). */
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <err.h>
+#include "tdb1-logging.h"
+
+int main(int argc, char *argv[])
+{
+	struct tdb1_context *tdb;
+	TDB1_DATA key, data;
+
+	plan_tests(11);
+	tdb = tdb1_open_ex("run-readonly-check.tdb", 1024,
+			  TDB1_DEFAULT,
+			  O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
+
+	ok1(tdb);
+	key.dsize = strlen("hi");
+	key.dptr = (void *)"hi";
+	data.dsize = strlen("world");
+	data.dptr = (void *)"world";
+
+	ok1(tdb1_store(tdb, key, data, TDB1_INSERT) == 0);
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+
+	/* We are also allowed to do a check inside a transaction. */
+	ok1(tdb1_transaction_start(tdb) == 0);
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+	ok1(tdb1_close(tdb) == 0);
+
+	tdb = tdb1_open_ex("run-readonly-check.tdb", 1024,
+			  TDB1_DEFAULT, O_RDONLY, 0, &taplogctx, NULL);
+
+	ok1(tdb);
+	ok1(tdb1_store(tdb, key, data, TDB1_MODIFY) == -1);
+	ok1(tdb1_error(tdb) == TDB1_ERR_RDONLY);
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+	ok1(tdb1_close(tdb) == 0);
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1-rwlock-check.c b/lib/tdb2/test/run-tdb1-rwlock-check.c
new file mode 100644
index 0000000000..5d438d3883
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-rwlock-check.c
@@ -0,0 +1,36 @@
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <err.h>
+
+static void log_fn(struct tdb1_context *tdb, enum tdb1_debug_level level, const char *fmt, ...)
+{
+	unsigned int *count = tdb1_get_logging_private(tdb);
+	if (strstr(fmt, "spinlocks"))
+		(*count)++;
+}
+
+/* The code should barf on TDBs created with rwlocks. */
+int main(int argc, char *argv[])
+{
+	struct tdb1_context *tdb;
+	unsigned int log_count;
+	struct tdb1_logging_context log_ctx = { log_fn, &log_count };
+
+	plan_tests(4);
+
+	/* We should fail to open rwlock-using tdbs of either endian. */
+	log_count = 0;
+	tdb = tdb1_open_ex("test/rwlock-le.tdb1", 0, 0, O_RDWR, 0,
+			  &log_ctx, NULL);
+	ok1(!tdb);
+	ok1(log_count == 1);
+
+	log_count = 0;
+	tdb = tdb1_open_ex("test/rwlock-be.tdb1", 0, 0, O_RDWR, 0,
+			  &log_ctx, NULL);
+	ok1(!tdb);
+	ok1(log_count == 1);
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1-summary.c b/lib/tdb2/test/run-tdb1-summary.c
new file mode 100644
index 0000000000..ccfc0958e1
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-summary.c
@@ -0,0 +1,54 @@
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <err.h>
+
+int main(int argc, char *argv[])
+{
+	unsigned int i, j;
+	struct tdb1_context *tdb;
+	int flags[] = { TDB1_INTERNAL, TDB1_DEFAULT, TDB1_NOMMAP,
+			TDB1_INTERNAL|TDB1_CONVERT, TDB1_CONVERT,
+			TDB1_NOMMAP|TDB1_CONVERT };
+	TDB1_DATA key = { (unsigned char *)&j, sizeof(j) };
+	TDB1_DATA data = { (unsigned char *)&j, sizeof(j) };
+	char *summary;
+
+	plan_tests(sizeof(flags) / sizeof(flags[0]) * 14);
+	for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
+		tdb = tdb1_open("run-summary.tdb", 131, flags[i],
+			       O_RDWR|O_CREAT|O_TRUNC, 0600);
+		ok1(tdb);
+		if (!tdb)
+			continue;
+
+		/* Put some stuff in there. */
+		for (j = 0; j < 500; j++) {
+			/* Make sure padding varies to we get some graphs! */
+			data.dsize = j % (sizeof(j) + 1);
+			if (tdb1_store(tdb, key, data, TDB1_REPLACE) != 0)
+				fail("Storing in tdb");
+		}
+
+		summary = tdb1_summary(tdb);
+		diag("%s", summary);
+		ok1(strstr(summary, "Size of file/data: "));
+		ok1(strstr(summary, "Number of records: 500\n"));
+		ok1(strstr(summary, "Smallest/average/largest keys: 4/4/4\n"));
+		ok1(strstr(summary, "Smallest/average/largest data: 0/2/4\n"));
+		ok1(strstr(summary, "Smallest/average/largest padding: "));
+		ok1(strstr(summary, "Number of dead records: 0\n"));
+		ok1(strstr(summary, "Number of free records: 1\n"));
+		ok1(strstr(summary, "Smallest/average/largest free records: "));
+		ok1(strstr(summary, "Number of hash chains: 131\n"));
+		ok1(strstr(summary, "Smallest/average/largest hash chains: "));
+		ok1(strstr(summary, "Number of uncoalesced records: 0\n"));
+		ok1(strstr(summary, "Smallest/average/largest uncoalesced runs: 0/0/0\n"));
+		ok1(strstr(summary, "Percentage keys/data/padding/free/dead/rechdrs&tailers/hashes: "));
+
+		free(summary);
+		tdb1_close(tdb);
+	}
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1-traverse-in-transaction.c b/lib/tdb2/test/run-tdb1-traverse-in-transaction.c
new file mode 100644
index 0000000000..eb925be20c
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-traverse-in-transaction.c
@@ -0,0 +1,80 @@
+#include "config.h"
+#include "tdb1-lock-tracking.h"
+#define fcntl fcntl_with_lockcheck1
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#undef fcntl_with_lockcheck
+#include <stdlib.h>
+#include <stdbool.h>
+#include <err.h>
+#include "tdb1-external-agent.h"
+#include "tdb1-logging.h"
+
+static struct agent *agent;
+
+static bool correct_key(TDB1_DATA key)
+{
+	return key.dsize == strlen("hi")
+		&& memcmp(key.dptr, "hi", key.dsize) == 0;
+}
+
+static bool correct_data(TDB1_DATA data)
+{
+	return data.dsize == strlen("world")
+		&& memcmp(data.dptr, "world", data.dsize) == 0;
+}
+
+static int traverse(struct tdb1_context *tdb, TDB1_DATA key, TDB1_DATA data,
+		     void *p)
+{
+	ok1(correct_key(key));
+	ok1(correct_data(data));
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	struct tdb1_context *tdb;
+	TDB1_DATA key, data;
+
+	plan_tests(13);
+	agent = prepare_external_agent1();
+	if (!agent)
+		err(1, "preparing agent");
+
+	tdb = tdb1_open_ex("run-traverse-in-transaction.tdb",
+			  1024, TDB1_CLEAR_IF_FIRST, O_CREAT|O_TRUNC|O_RDWR,
+			  0600, &taplogctx, NULL);
+	ok1(tdb);
+
+	key.dsize = strlen("hi");
+	key.dptr = (void *)"hi";
+	data.dptr = (void *)"world";
+	data.dsize = strlen("world");
+
+	ok1(tdb1_store(tdb, key, data, TDB1_INSERT) == 0);
+
+	ok1(external_agent_operation1(agent, OPEN, tdb1_name(tdb)) == SUCCESS);
+
+	ok1(tdb1_transaction_start(tdb) == 0);
+	ok1(external_agent_operation1(agent, TRANSACTION_START, tdb1_name(tdb))
+	    == WOULD_HAVE_BLOCKED);
+	tdb1_traverse(tdb, traverse, NULL);
+
+	/* That should *not* release the transaction lock! */
+	ok1(external_agent_operation1(agent, TRANSACTION_START, tdb1_name(tdb))
+	    == WOULD_HAVE_BLOCKED);
+	tdb1_traverse_read(tdb, traverse, NULL);
+
+	/* That should *not* release the transaction lock! */
+	ok1(external_agent_operation1(agent, TRANSACTION_START, tdb1_name(tdb))
+	    == WOULD_HAVE_BLOCKED);
+	ok1(tdb1_transaction_commit(tdb) == 0);
+	/* Now we should be fine. */
+	ok1(external_agent_operation1(agent, TRANSACTION_START, tdb1_name(tdb))
+	    == SUCCESS);
+
+	tdb1_close(tdb);
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1-wronghash-fail.c b/lib/tdb2/test/run-tdb1-wronghash-fail.c
new file mode 100644
index 0000000000..5a7e311a9c
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-wronghash-fail.c
@@ -0,0 +1,111 @@
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <err.h>
+
+static void log_fn(struct tdb1_context *tdb, enum tdb1_debug_level level, const char *fmt, ...)
+{
+	unsigned int *count = tdb1_get_logging_private(tdb);
+	if (strstr(fmt, "hash"))
+		(*count)++;
+}
+
+int main(int argc, char *argv[])
+{
+	struct tdb1_context *tdb;
+	unsigned int log_count;
+	TDB1_DATA d;
+	struct tdb1_logging_context log_ctx = { log_fn, &log_count };
+
+	plan_tests(28);
+
+	/* Create with default hash. */
+	log_count = 0;
+	tdb = tdb1_open_ex("run-wronghash-fail.tdb", 0, 0,
+			  O_CREAT|O_RDWR|O_TRUNC, 0600, &log_ctx, NULL);
+	ok1(tdb);
+	ok1(log_count == 0);
+	d.dptr = (void *)"Hello";
+	d.dsize = 5;
+	ok1(tdb1_store(tdb, d, d, TDB1_INSERT) == 0);
+	tdb1_close(tdb);
+
+	/* Fail to open with different hash. */
+	tdb = tdb1_open_ex("run-wronghash-fail.tdb", 0, 0, O_RDWR, 0,
+			  &log_ctx, tdb1_jenkins_hash);
+	ok1(!tdb);
+	ok1(log_count == 1);
+
+	/* Create with different hash. */
+	log_count = 0;
+	tdb = tdb1_open_ex("run-wronghash-fail.tdb", 0, 0,
+			  O_CREAT|O_RDWR|O_TRUNC,
+			  0600, &log_ctx, tdb1_jenkins_hash);
+	ok1(tdb);
+	ok1(log_count == 0);
+	tdb1_close(tdb);
+
+	/* Endian should be no problem. */
+	log_count = 0;
+	tdb = tdb1_open_ex("test/jenkins-le-hash.tdb1", 0, 0, O_RDWR, 0,
+			  &log_ctx, tdb1_old_hash);
+	ok1(!tdb);
+	ok1(log_count == 1);
+
+	log_count = 0;
+	tdb = tdb1_open_ex("test/jenkins-be-hash.tdb1", 0, 0, O_RDWR, 0,
+			  &log_ctx, tdb1_old_hash);
+	ok1(!tdb);
+	ok1(log_count == 1);
+
+	log_count = 0;
+	/* Fail to open with old default hash. */
+	tdb = tdb1_open_ex("run-wronghash-fail.tdb", 0, 0, O_RDWR, 0,
+			  &log_ctx, tdb1_old_hash);
+	ok1(!tdb);
+	ok1(log_count == 1);
+
+	log_count = 0;
+	tdb = tdb1_open_ex("test/jenkins-le-hash.tdb1", 0, 0, O_RDONLY,
+			  0, &log_ctx, tdb1_jenkins_hash);
+	ok1(tdb);
+	ok1(log_count == 0);
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+	tdb1_close(tdb);
+
+	log_count = 0;
+	tdb = tdb1_open_ex("test/jenkins-be-hash.tdb1", 0, 0, O_RDONLY,
+			  0, &log_ctx, tdb1_jenkins_hash);
+	ok1(tdb);
+	ok1(log_count == 0);
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+	tdb1_close(tdb);
+
+	/* It should open with jenkins hash if we don't specify. */
+	log_count = 0;
+	tdb = tdb1_open_ex("test/jenkins-le-hash.tdb1", 0, 0, O_RDWR, 0,
+			  &log_ctx, NULL);
+	ok1(tdb);
+	ok1(log_count == 0);
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+	tdb1_close(tdb);
+
+	log_count = 0;
+	tdb = tdb1_open_ex("test/jenkins-be-hash.tdb1", 0, 0, O_RDWR, 0,
+			  &log_ctx, NULL);
+	ok1(tdb);
+	ok1(log_count == 0);
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+	tdb1_close(tdb);
+
+	log_count = 0;
+	tdb = tdb1_open_ex("run-wronghash-fail.tdb", 0, 0, O_RDONLY,
+			  0, &log_ctx, NULL);
+	ok1(tdb);
+	ok1(log_count == 0);
+	ok1(tdb1_check(tdb, NULL, NULL) == 0);
+	tdb1_close(tdb);
+
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1-zero-append.c b/lib/tdb2/test/run-tdb1-zero-append.c
new file mode 100644
index 0000000000..e79ab60a00
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-zero-append.c
@@ -0,0 +1,31 @@
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <err.h>
+#include "tdb1-logging.h"
+
+int main(int argc, char *argv[])
+{
+	struct tdb1_context *tdb;
+	TDB1_DATA key, data;
+
+	plan_tests(4);
+	tdb = tdb1_open_ex(NULL, 1024, TDB1_INTERNAL, O_CREAT|O_TRUNC|O_RDWR,
+			  0600, &taplogctx, NULL);
+	ok1(tdb);
+
+	/* Tickle bug on appending zero length buffer to zero length buffer. */
+	key.dsize = strlen("hi");
+	key.dptr = (void *)"hi";
+	data.dptr = (void *)"world";
+	data.dsize = 0;
+
+	ok1(tdb1_append(tdb, key, data) == 0);
+	ok1(tdb1_append(tdb, key, data) == 0);
+	data = tdb1_fetch(tdb, key);
+	ok1(data.dsize == 0);
+	free(data.dptr);
+	tdb1_close(tdb);
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/run-tdb1.c b/lib/tdb2/test/run-tdb1.c
new file mode 100644
index 0000000000..ebbfd77bb2
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1.c
@@ -0,0 +1,40 @@
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <err.h>
+#include "tdb1-logging.h"
+
+int main(int argc, char *argv[])
+{
+	struct tdb1_context *tdb;
+	TDB1_DATA key, data;
+
+	plan_tests(10);
+	tdb = tdb1_open_ex("run.tdb", 1024, TDB1_CLEAR_IF_FIRST,
+			  O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
+
+	ok1(tdb);
+	key.dsize = strlen("hi");
+	key.dptr = (void *)"hi";
+	data.dsize = strlen("world");
+	data.dptr = (void *)"world";
+
+	ok1(tdb1_store(tdb, key, data, TDB1_MODIFY) < 0);
+	ok1(tdb1_error(tdb) == TDB1_ERR_NOEXIST);
+	ok1(tdb1_store(tdb, key, data, TDB1_INSERT) == 0);
+	ok1(tdb1_store(tdb, key, data, TDB1_INSERT) < 0);
+	ok1(tdb1_error(tdb) == TDB1_ERR_EXISTS);
+	ok1(tdb1_store(tdb, key, data, TDB1_MODIFY) == 0);
+
+	data = tdb1_fetch(tdb, key);
+	ok1(data.dsize == strlen("world"));
+	ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
+	free(data.dptr);
+
+	key.dsize++;
+	data = tdb1_fetch(tdb, key);
+	ok1(data.dptr == NULL);
+	tdb1_close(tdb);
+
+	return exit_status();
+}
diff --git a/lib/tdb2/test/rwlock-be.tdb1 b/lib/tdb2/test/rwlock-be.tdb1
new file mode 100644
index 0000000000..45b5f09a1b
--- /dev/null
+++ b/lib/tdb2/test/rwlock-be.tdb1
diff --git a/lib/tdb2/test/rwlock-le.tdb1 b/lib/tdb2/test/rwlock-le.tdb1
new file mode 100644
index 0000000000..45b5f09a1b
--- /dev/null
+++ b/lib/tdb2/test/rwlock-le.tdb1
diff --git a/lib/tdb2/test/tdb1-external-agent.c b/lib/tdb2/test/tdb1-external-agent.c
new file mode 100644
index 0000000000..3f73ae3aaf
--- /dev/null
+++ b/lib/tdb2/test/tdb1-external-agent.c
@@ -0,0 +1,196 @@
+#include "tdb1-external-agent.h"
+#include "tdb1-lock-tracking.h"
+#include "tdb1-logging.h"
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <err.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <string.h>
+#include <errno.h>
+#include <ccan/tdb2/tdb1.h>
+#include <ccan/tdb2/tdb1_private.h>
+#include <ccan/tap/tap.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+static struct tdb1_context *tdb;
+
+static enum agent_return do_operation(enum operation op, const char *name)
+{
+	TDB1_DATA k;
+	enum agent_return ret;
+	TDB1_DATA data;
+
+	if (op != OPEN && op != OPEN_WITH_CLEAR_IF_FIRST && !tdb) {
+		diag("external: No tdb open!");
+		return OTHER_FAILURE;
+	}
+
+	k.dptr = (void *)name;
+	k.dsize = strlen(name);
+
+	locking_would_block1 = 0;
+	switch (op) {
+	case OPEN:
+		if (tdb) {
+			diag("Already have tdb %s open", tdb1_name(tdb));
+			return OTHER_FAILURE;
+		}
+		tdb = tdb1_open_ex(name, 0, TDB1_DEFAULT, O_RDWR, 0,
+				  &taplogctx, NULL);
+		if (!tdb) {
+			if (!locking_would_block1)
+				diag("Opening tdb gave %s", strerror(errno));
+			ret = OTHER_FAILURE;
+		} else
+			ret = SUCCESS;
+		break;
+	case OPEN_WITH_CLEAR_IF_FIRST:
+		if (tdb)
+			return OTHER_FAILURE;
+		tdb = tdb1_open_ex(name, 0, TDB1_CLEAR_IF_FIRST, O_RDWR, 0,
+				  &taplogctx, NULL);
+		ret = tdb ? SUCCESS : OTHER_FAILURE;
+		break;
+	case TRANSACTION_START:
+		ret = tdb1_transaction_start(tdb) == 0 ? SUCCESS : OTHER_FAILURE;
+		break;
+	case FETCH:
+		data = tdb1_fetch(tdb, k);
+		if (data.dptr == NULL) {
+			if (tdb->ecode == TDB1_ERR_NOEXIST)
+				ret = FAILED;
+			else
+				ret = OTHER_FAILURE;
+		} else if (data.dsize != k.dsize
+			   || memcmp(data.dptr, k.dptr, k.dsize) != 0) {
+			ret = OTHER_FAILURE;
+		} else {
+			ret = SUCCESS;
+		}
+		free(data.dptr);
+		break;
+	case STORE:
+		ret = tdb1_store(tdb, k, k, 0) == 0 ? SUCCESS : OTHER_FAILURE;
+		break;
+	case TRANSACTION_COMMIT:
+		ret = tdb1_transaction_commit(tdb)==0 ? SUCCESS : OTHER_FAILURE;
+		break;
+	case CHECK:
+		ret = tdb1_check(tdb, NULL, NULL) == 0 ? SUCCESS : OTHER_FAILURE;
+		break;
+	case NEEDS_RECOVERY:
+		ret = tdb1_needs_recovery(tdb) ? SUCCESS : FAILED;
+		break;
+	case CLOSE:
+		ret = tdb1_close(tdb) == 0 ? SUCCESS : OTHER_FAILURE;
+		tdb = NULL;
+		break;
+	default:
+		ret = OTHER_FAILURE;
+	}
+
+	if (locking_would_block1)
+		ret = WOULD_HAVE_BLOCKED;
+
+	return ret;
+}
+
+struct agent {
+	int cmdfd, responsefd;
+};
+
+/* Do this before doing any tdb stuff.  Return handle, or NULL. */
+struct agent *prepare_external_agent1(void)
+{
+	int pid, ret;
+	int command[2], response[2];
+	char name[1+PATH_MAX];
+
+	if (pipe(command) != 0 || pipe(response) != 0)
+		return NULL;
+
+	pid = fork();
+	if (pid < 0)
+		return NULL;
+
+	if (pid != 0) {
+		struct agent *agent = malloc(sizeof(*agent));
+
+		close(command[0]);
+		close(response[1]);
+		agent->cmdfd = command[1];
+		agent->responsefd = response[0];
+		return agent;
+	}
+
+	close(command[1]);
+	close(response[0]);
+
+	/* We want to fail, not block. */
+	nonblocking_locks1 = true;
+	log_prefix = "external: ";
+	while ((ret = read(command[0], name, sizeof(name))) > 0) {
+		enum agent_return result;
+
+		result = do_operation(name[0], name+1);
+		if (write(response[1], &result, sizeof(result))
+		    != sizeof(result))
+			err(1, "Writing response");
+	}
+	exit(0);
+}
+
+/* Ask the external agent to try to do an operation. */
+enum agent_return external_agent_operation1(struct agent *agent,
+					   enum operation op,
+					   const char *name)
+{
+	enum agent_return res;
+	unsigned int len;
+	char *string;
+
+	if (!name)
+		name = "";
+	len = 1 + strlen(name) + 1;
+	string = malloc(len);
+
+	string[0] = op;
+	strcpy(string+1, name);
+
+	if (write(agent->cmdfd, string, len) != len
+	    || read(agent->responsefd, &res, sizeof(res)) != sizeof(res))
+		res = AGENT_DIED;
+
+	free(string);
+	return res;
+}
+
+const char *agent_return_name1(enum agent_return ret)
+{
+	return ret == SUCCESS ? "SUCCESS"
+		: ret == WOULD_HAVE_BLOCKED ? "WOULD_HAVE_BLOCKED"
+		: ret == AGENT_DIED ? "AGENT_DIED"
+		: ret == FAILED ? "FAILED"
+		: ret == OTHER_FAILURE ? "OTHER_FAILURE"
+		: "**INVALID**";
+}
+
+const char *operation_name1(enum operation op)
+{
+	switch (op) {
+	case OPEN: return "OPEN";
+	case OPEN_WITH_CLEAR_IF_FIRST: return "OPEN_WITH_CLEAR_IF_FIRST";
+	case TRANSACTION_START: return "TRANSACTION_START";
+	case FETCH: return "FETCH";
+	case STORE: return "STORE";
+	case TRANSACTION_COMMIT: return "TRANSACTION_COMMIT";
+	case CHECK: return "CHECK";
+	case NEEDS_RECOVERY: return "NEEDS_RECOVERY";
+	case CLOSE: return "CLOSE";
+	}
+	return "**INVALID**";
+}
diff --git a/lib/tdb2/test/tdb1-external-agent.h b/lib/tdb2/test/tdb1-external-agent.h
new file mode 100644
index 0000000000..8b0c1548a7
--- /dev/null
+++ b/lib/tdb2/test/tdb1-external-agent.h
@@ -0,0 +1,41 @@
+#ifndef TDB_TEST_EXTERNAL_AGENT_H
+#define TDB_TEST_EXTERNAL_AGENT_H
+
+/* For locking tests, we need a different process to try things at
+ * various times. */
+enum operation {
+	OPEN,
+	OPEN_WITH_CLEAR_IF_FIRST,
+	TRANSACTION_START,
+	FETCH,
+	STORE,
+	TRANSACTION_COMMIT,
+	CHECK,
+	NEEDS_RECOVERY,
+	CLOSE,
+};
+
+/* Do this before doing any tdb stuff.  Return handle, or -1. */
+struct agent *prepare_external_agent1(void);
+
+enum agent_return {
+	SUCCESS,
+	WOULD_HAVE_BLOCKED,
+	AGENT_DIED,
+	FAILED, /* For fetch, or NEEDS_RECOVERY */
+	OTHER_FAILURE,
+};
+
+/* Ask the external agent to try to do an operation.
+ * name == tdb name for OPEN/OPEN_WITH_CLEAR_IF_FIRST,
+ * record name for FETCH/STORE (store stores name as data too)
+ */
+enum agent_return external_agent_operation1(struct agent *handle,
+					   enum operation op,
+					   const char *name);
+
+/* Mapping enum -> string. */
+const char *agent_return_name1(enum agent_return ret);
+const char *operation_name1(enum operation op);
+
+#endif /* TDB_TEST_EXTERNAL_AGENT_H */
diff --git a/lib/tdb2/test/tdb1-lock-tracking.c b/lib/tdb2/test/tdb1-lock-tracking.c
new file mode 100644
index 0000000000..197b1f0706
--- /dev/null
+++ b/lib/tdb2/test/tdb1-lock-tracking.c
@@ -0,0 +1,146 @@
+/* We save the locks so we can reaquire them. */
+#include <ccan/tdb2/tdb1_private.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <ccan/tap/tap.h>
+#include "tdb1-lock-tracking.h"
+
+struct lock {
+	struct lock *next;
+	unsigned int off;
+	unsigned int len;
+	int type;
+};
+static struct lock *locks;
+int locking_errors1 = 0;
+bool suppress_lockcheck1 = false;
+bool nonblocking_locks1;
+int locking_would_block1 = 0;
+void (*unlock_callback1)(int fd);
+
+int fcntl_with_lockcheck1(int fd, int cmd, ... /* arg */ )
+{
+	va_list ap;
+	int ret, arg3;
+	struct flock *fl;
+	bool may_block = false;
+
+	if (cmd != F_SETLK && cmd != F_SETLKW) {
+		/* This may be totally bogus, but we don't know in general. */
+		va_start(ap, cmd);
+		arg3 = va_arg(ap, int);
+		va_end(ap);
+
+		return fcntl(fd, cmd, arg3);
+	}
+
+	va_start(ap, cmd);
+	fl = va_arg(ap, struct flock *);
+	va_end(ap);
+
+	if (cmd == F_SETLKW && nonblocking_locks1) {
+		cmd = F_SETLK;
+		may_block = true;
+	}
+	ret = fcntl(fd, cmd, fl);
+
+	/* Detect when we failed, but might have been OK if we waited. */
+	if (may_block && ret == -1 && (errno == EAGAIN || errno == EACCES)) {
+		locking_would_block1++;
+	}
+
+	if (fl->l_type == F_UNLCK) {
+		struct lock **l;
+		struct lock *old = NULL;
+
+		for (l = &locks; *l; l = &(*l)->next) {
+			if ((*l)->off == fl->l_start
+			    && (*l)->len == fl->l_len) {
+				if (ret == 0) {
+					old = *l;
+					*l = (*l)->next;
+					free(old);
+				}
+				break;
+			}
+		}
+		if (!old && !suppress_lockcheck1) {
+			diag("Unknown unlock %u@%u - %i",
+			     (int)fl->l_len, (int)fl->l_start, ret);
+			locking_errors1++;
+		}
+	} else {
+		struct lock *new, *i;
+		unsigned int fl_end = fl->l_start + fl->l_len;
+		if (fl->l_len == 0)
+			fl_end = (unsigned int)-1;
+
+		/* Check for overlaps: we shouldn't do this. */
+		for (i = locks; i; i = i->next) {
+			unsigned int i_end = i->off + i->len;
+			if (i->len == 0)
+				i_end = (unsigned int)-1;
+
+			if (fl->l_start >= i->off && fl->l_start < i_end)
+				break;
+			if (fl_end >= i->off && fl_end < i_end)
+				break;
+
+			/* tdb_allrecord_lock does this, handle adjacent: */
+			if (fl->l_start == i_end && fl->l_type == i->type) {
+				if (ret == 0) {
+					i->len = fl->l_len
+						? i->len + fl->l_len
+						: 0;
+				}
+				goto done;
+			}
+		}
+		if (i) {
+			/* Special case: upgrade of allrecord lock. */
+			if (i->type == F_RDLCK && fl->l_type == F_WRLCK
+			    && i->off == TDB1_FREELIST_TOP
+			    && fl->l_start == TDB1_FREELIST_TOP
+			    && i->len == 0
+			    && fl->l_len == 0) {
+				if (ret == 0)
+					i->type = F_WRLCK;
+				goto done;
+			}
+			if (!suppress_lockcheck1) {
+				diag("%s lock %u@%u overlaps %u@%u",
+				     fl->l_type == F_WRLCK ? "write" : "read",
+				     (int)fl->l_len, (int)fl->l_start,
+				     i->len, (int)i->off);
+				locking_errors1++;
+			}
+		}
+
+		if (ret == 0) {
+			new = malloc(sizeof *new);
+			new->off = fl->l_start;
+			new->len = fl->l_len;
+			new->type = fl->l_type;
+			new->next = locks;
+			locks = new;
+		}
+	}
+done:
+	if (ret == 0 && fl->l_type == F_UNLCK && unlock_callback1)
+		unlock_callback1(fd);
+	return ret;
+}
+
+unsigned int forget_locking1(void)
+{
+	unsigned int num = 0;
+	while (locks) {
+		struct lock *next = locks->next;
+		free(locks);
+		locks = next;
+		num++;
+	}
+	return num;
+}
diff --git a/lib/tdb2/test/tdb1-lock-tracking.h b/lib/tdb2/test/tdb1-lock-tracking.h
new file mode 100644
index 0000000000..cb8c2f1278
--- /dev/null
+++ b/lib/tdb2/test/tdb1-lock-tracking.h
@@ -0,0 +1,26 @@
+#ifndef TDB1_LOCK_TRACKING_H
+#define TDB1_LOCK_TRACKING_H
+#include <ccan/tdb2/private.h>
+#include <stdbool.h>
+
+/* Set this if you want a callback after fnctl unlock. */
+extern void (*unlock_callback1)(int fd);
+
+/* Replacement fcntl. */
+int fcntl_with_lockcheck1(int fd, int cmd, ... /* arg */ );
+
+/* Discard locking info: returns number of locks outstanding. */
+unsigned int forget_locking1(void);
+
+/* Number of errors in locking. */
+extern int locking_errors1;
+
+/* Suppress lock checking. */
+extern bool suppress_lockcheck1;
+
+/* Make all locks non-blocking. */
+extern bool nonblocking_locks1;
+
+/* Number of times we failed a lock because we made it non-blocking. */
+extern int locking_would_block1;
+#endif /* LOCK_TRACKING_H */
diff --git a/lib/tdb2/test/tdb1-logging.c b/lib/tdb2/test/tdb1-logging.c
new file mode 100644
index 0000000000..43ce07b27c
--- /dev/null
+++ b/lib/tdb2/test/tdb1-logging.c
@@ -0,0 +1,30 @@
+#include "tdb1-logging.h"
+#include <ccan/tap/tap.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+/* Turn log messages into tap diag messages. */
+static void taplog(struct tdb1_context *tdb,
+		   enum tdb1_debug_level level,
+		   const char *fmt, ...)
+{
+	va_list ap;
+	char line[200];
+
+	if (suppress_logging)
+		return;
+
+	va_start(ap, fmt);
+	vsprintf(line, fmt, ap);
+	va_end(ap);
+
+	/* Strip trailing \n: diag adds it. */
+	if (line[0] && line[strlen(line)-1] == '\n')
+		diag("%s%.*s", log_prefix, (unsigned)strlen(line)-1, line);
+	else
+		diag("%s%s", log_prefix, line);
+}
+
+struct tdb1_logging_context taplogctx = { taplog, NULL };
diff --git a/lib/tdb2/test/tdb1-logging.h b/lib/tdb2/test/tdb1-logging.h
new file mode 100644
index 0000000000..128ec7f81d
--- /dev/null
+++ b/lib/tdb2/test/tdb1-logging.h
@@ -0,0 +1,10 @@
+#ifndef TDB_TEST_LOGGING_H
+#define TDB_TEST_LOGGING_H
+#include <ccan/tdb2/tdb1.h>
+#include <stdbool.h>
+
+extern bool suppress_logging;
+extern const char *log_prefix;
+extern struct tdb1_logging_context taplogctx;
+
+#endif /* TDB_TEST_LOGGING_H */
diff --git a/lib/tdb2/test/tdb1.corrupt b/lib/tdb2/test/tdb1.corrupt
new file mode 100644
index 0000000000..83d6677454
--- /dev/null
+++ b/lib/tdb2/test/tdb1.corrupt
diff --git a/lib/tdb2/test/tdb2-source.h b/lib/tdb2/test/tdb2-source.h
index 56765c8cd7..f289aeb009 100644
--- a/lib/tdb2/test/tdb2-source.h
+++ b/lib/tdb2/test/tdb2-source.h
@@ -1,3 +1,4 @@
+#include "config.h"
 #include <ccan/tdb2/check.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/hash.c>