tdb: enforce hashing, via example hash in old rwlocks entry in header.

[ccan] / ccan / tdb / test / run-wronghash-fail.c

diff --git a/ccan/tdb/test/run-wronghash-fail.c b/ccan/tdb/test/run-wronghash-fail.c
new file mode 100644 (file)
index 0000000..2804515
--- /dev/null
+++ b/ccan/tdb/test/run-wronghash-fail.c
@@ -0,0 +1,97 @@
+#define _XOPEN_SOURCE 500
+#include <ccan/tdb/tdb.h>
+#include <ccan/tdb/io.c>
+#include <ccan/tdb/tdb.c>
+#include <ccan/tdb/lock.c>
+#include <ccan/tdb/freelist.c>
+#include <ccan/tdb/traverse.c>
+#include <ccan/tdb/transaction.c>
+#include <ccan/tdb/error.c>
+#include <ccan/tdb/open.c>
+#include <ccan/tdb/check.c>
+#include <ccan/hash/hash.h>
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <err.h>
+
+static unsigned int jenkins_hash(TDB_DATA *key)
+{
+       return hash_stable(key->dptr, key->dsize, 0);
+}
+
+static void log_fn(struct tdb_context *tdb, enum tdb_debug_level level, const char *fmt, ...)
+{
+       unsigned int *count = tdb_get_logging_private(tdb);
+       /* Old code used to complain about spinlocks when we put something
+          here. */
+       if (strstr(fmt, "wrong hash") || strstr(fmt, "spinlock"))
+               (*count)++;
+}
+
+int main(int argc, char *argv[])
+{
+       struct tdb_context *tdb;
+       unsigned int log_count;
+       struct tdb_logging_context log_ctx = { log_fn, &log_count };
+
+       plan_tests(16);
+
+       /* Create with default hash. */
+       log_count = 0;
+       tdb = tdb_open_ex("run-wronghash-fail.tdb", 0, 0,
+                         O_CREAT|O_RDWR|O_TRUNC, 0600, &log_ctx, NULL);
+       ok1(tdb);
+       ok1(log_count == 0);
+       tdb_close(tdb);
+
+       /* Fail to open with different hash. */
+       tdb = tdb_open_ex("run-wronghash-fail.tdb", 0, 0, O_RDWR, 0,
+                         &log_ctx, jenkins_hash);
+       ok1(!tdb);
+       ok1(log_count == 1);
+
+       /* Create with different hash. */
+       log_count = 0;
+       tdb = tdb_open_ex("run-wronghash-fail.tdb", 0, 0,
+                         O_CREAT|O_RDWR|O_TRUNC,
+                         0600, &log_ctx, jenkins_hash);
+       ok1(tdb);
+       ok1(log_count == 0);
+       tdb_close(tdb);
+
+       /* Endian should be no problem. */
+       log_count = 0;
+       tdb = tdb_open_ex("test/jenkins-le-hash.tdb", 0, 0, O_RDWR, 0,
+                         &log_ctx, NULL);
+       ok1(!tdb);
+       ok1(log_count == 1);
+
+       log_count = 0;
+       tdb = tdb_open_ex("test/jenkins-be-hash.tdb", 0, 0, O_RDWR, 0,
+                         &log_ctx, NULL);
+       ok1(!tdb);
+       ok1(log_count == 1);
+
+       log_count = 0;
+       /* Fail to open with defailt hash. */
+       tdb = tdb_open_ex("run-wronghash-fail.tdb", 0, 0, O_RDWR, 0,
+                         &log_ctx, NULL);
+       ok1(!tdb);
+       ok1(log_count == 1);
+
+       log_count = 0;
+       tdb = tdb_open_ex("test/jenkins-le-hash.tdb", 0, 0, O_RDONLY,
+                         0, &log_ctx, jenkins_hash);
+       ok1(tdb);
+       ok1(log_count == 0);
+       tdb_close(tdb);
+
+       log_count = 0;
+       tdb = tdb_open_ex("test/jenkins-be-hash.tdb", 0, 0, O_RDONLY,
+                         0, &log_ctx, jenkins_hash);
+       ok1(tdb);
+       ok1(log_count == 0);
+       tdb_close(tdb);
+
+       return exit_status();
+}