1 files changed, 125 insertions, 0 deletions
diff --git a/lib/tdb/test/run-transaction-expand.c b/lib/tdb/test/run-transaction-expand.c
new file mode 100644
index 0000000..d36b894
--- /dev/null
+++ b/lib/tdb/test/run-transaction-expand.c
@@ -0,0 +1,125 @@
+#include "../common/tdb_private.h"
+
+/* Speed up the tests, but do the actual sync tests. */
+static unsigned int sync_counts = 0;
+static inline int fake_fsync(int fd)
+{
+	sync_counts++;
+	return 0;
+}
+#define fsync fake_fsync
+
+#ifdef MS_SYNC
+static inline int fake_msync(void *addr, size_t length, int flags)
+{
+	sync_counts++;
+	return 0;
+}
+#define msync fake_msync
+#endif
+
+#ifdef HAVE_FDATASYNC
+static inline int fake_fdatasync(int fd)
+{
+	sync_counts++;
+	return 0;
+}
+#define fdatasync fake_fdatasync
+#endif
+
+#include "../common/io.c"
+#include "../common/tdb.c"
+#include "../common/lock.c"
+#include "../common/freelist.c"
+#include "../common/traverse.c"
+#include "../common/transaction.c"
+#include "../common/error.c"
+#include "../common/open.c"
+#include "../common/check.c"
+#include "../common/hash.c"
+#include "../common/mutex.c"
+#include "tap-interface.h"
+#include <stdlib.h>
+#include "logging.h"
+
+static void write_record(struct tdb_context *tdb, size_t extra_len,
+			 TDB_DATA *data)
+{
+	TDB_DATA key;
+	key.dsize = strlen("hi");
+	key.dptr = discard_const_p(uint8_t, "hi");
+
+	data->dsize += extra_len;
+	tdb_transaction_start(tdb);
+	tdb_store(tdb, key, *data, TDB_REPLACE);
+	tdb_transaction_commit(tdb);
+}
+
+int main(int argc, char *argv[])
+{
+	struct tdb_context *tdb;
+	size_t i;
+	TDB_DATA data;
+	struct tdb_record rec;
+	tdb_off_t off;
+
+	/* Do *not* suppress sync for this test; we do it ourselves. */
+	unsetenv("TDB_NO_FSYNC");
+
+	plan_tests(5);
+	tdb = tdb_open_ex("run-transaction-expand.tdb",
+			  1024, TDB_CLEAR_IF_FIRST,
+			  O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
+	ok1(tdb);
+
+	data.dsize = 0;
+	data.dptr = calloc(1000, getpagesize());
+	if (data.dptr == NULL) {
+		diag("Unable to allocate memory for data.dptr");
+		tdb_close(tdb);
+		exit(1);
+	}
+
+	/* Simulate a slowly growing record. */
+	for (i = 0; i < 1000; i++)
+		write_record(tdb, getpagesize(), &data);
+
+	tdb_ofs_read(tdb, TDB_RECOVERY_HEAD, &off);
+	tdb_read(tdb, off, &rec, sizeof(rec), DOCONV());
+	diag("TDB size = %zu, recovery = %llu-%llu",
+	     (size_t)tdb->map_size, (unsigned long long)off, (unsigned long long)(off + sizeof(rec) + rec.rec_len));
+
+	/* We should only be about 5 times larger than largest record. */
+	ok1(tdb->map_size < 6 * i * getpagesize());
+	tdb_close(tdb);
+
+	tdb = tdb_open_ex("run-transaction-expand.tdb",
+			  1024, TDB_CLEAR_IF_FIRST,
+			  O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
+	ok1(tdb);
+
+	data.dsize = 0;
+
+	/* Simulate a slowly growing record, repacking to keep
+	 * recovery area at end. */
+	for (i = 0; i < 1000; i++) {
+		write_record(tdb, getpagesize(), &data);
+		if (i % 10 == 0)
+			tdb_repack(tdb);
+	}
+
+	tdb_ofs_read(tdb, TDB_RECOVERY_HEAD, &off);
+	tdb_read(tdb, off, &rec, sizeof(rec), DOCONV());
+	diag("TDB size = %zu, recovery = %llu-%llu",
+	     (size_t)tdb->map_size, (unsigned long long)off, (unsigned long long)(off + sizeof(rec) + rec.rec_len));
+
+	/* We should only be about 4 times larger than largest record. */
+	ok1(tdb->map_size < 5 * i * getpagesize());
+
+	/* We should have synchronized multiple times. */
+	ok1(sync_counts);
+	tdb_close(tdb);
+	free(data.dptr);
+
+	return exit_status();
+}