1 files changed, 183 insertions, 0 deletions
diff --git a/lib/tdb/test/run-open-during-transaction.c b/lib/tdb/test/run-open-during-transaction.c
new file mode 100644
index 0000000..9a6c6c1
--- /dev/null
+++ b/lib/tdb/test/run-open-during-transaction.c
@@ -0,0 +1,183 @@
+#include "../common/tdb_private.h"
+#include "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_lockcheck
+#define ftruncate ftruncate_check
+
+#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 <stdbool.h>
+#include <stdarg.h>
+#include "external-agent.h"
+#include "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++;
+		free(contents);
+		return;
+	}
+
+	/* Ask agent to open file. */
+	ret = external_agent_operation(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_name(ret));
+		errors++;
+	}
+
+	if (ret == SUCCESS) {
+		ret = external_agent_operation(agent, CLOSE, NULL);
+		if (ret != SUCCESS) {
+			diag("Agent failed to close tdb: %s",
+			     agent_return_name(ret));
+			errors++;
+		}
+	} else if (ret != WOULD_HAVE_BLOCKED) {
+		diag("Agent opening file gave %s",
+		     agent_return_name(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[] = { TDB_DEFAULT,
+			      TDB_CLEAR_IF_FIRST,
+			      TDB_NOMMAP,
+			      TDB_CLEAR_IF_FIRST | TDB_NOMMAP };
+	int i;
+	struct tdb_context *tdb;
+	TDB_DATA key, data;
+
+	plan_tests(20);
+	agent = prepare_external_agent();
+
+	unlock_callback = after_unlock;
+	for (i = 0; i < sizeof(flags)/sizeof(flags[0]); i++) {
+		clear_if_first = (flags[i] & TDB_CLEAR_IF_FIRST);
+		diag("Test with %s and %s",
+		     clear_if_first ? "CLEAR" : "DEFAULT",
+		     (flags[i] & TDB_NOMMAP) ? "no mmap" : "mmap");
+		unlink(TEST_DBNAME);
+		tdb = tdb_open_ex(TEST_DBNAME, 1024, flags[i],
+				  O_CREAT|O_TRUNC|O_RDWR, 0600,
+				  &taplogctx, NULL);
+		ok1(tdb);
+
+		opened = true;
+		ok1(tdb_transaction_start(tdb) == 0);
+		key.dsize = strlen("hi");
+		key.dptr = discard_const_p(uint8_t, "hi");
+		data.dptr = discard_const_p(uint8_t, "world");
+		data.dsize = strlen("world");
+
+		ok1(tdb_store(tdb, key, data, TDB_INSERT) == 0);
+		ok1(tdb_transaction_commit(tdb) == 0);
+		ok(!errors, "We had %u open errors", errors);
+
+		opened = false;
+		tdb_close(tdb);
+	}
+
+	return exit_status();
+}