--- /dev/null
+#include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/free.c>
+#include <ccan/tdb2/lock.c>
+#include <ccan/tdb2/io.c>
+#include <ccan/tdb2/check.c>
+#include <ccan/tdb2/hash.c>
+#include <ccan/tap/tap.h>
+#include <err.h>
+#include "logging.h"
+
+static uint64_t fixedhash(const void *key, size_t len, uint64_t seed, void *p)
+{
+ return hash64_stable((const unsigned char *)key, len,
+ *(uint64_t *)p);
+}
+
+int main(int argc, char *argv[])
+{
+ unsigned int i, j;
+ struct tdb_context *tdb;
+ int flags[] = { TDB_INTERNAL, TDB_DEFAULT, TDB_NOMMAP,
+ TDB_INTERNAL|TDB_CONVERT, TDB_CONVERT,
+ TDB_NOMMAP|TDB_CONVERT };
+ uint64_t seed = 0;
+ union tdb_attribute fixed_hattr
+ = { .hash = { .base = { TDB_ATTRIBUTE_HASH },
+ .hash_fn = fixedhash,
+ .hash_private = &seed } };
+
+ fixed_hattr.base.next = &tap_log_attr;
+ plan_tests(sizeof(flags) / sizeof(flags[0]) * 5 + 1);
+
+ for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
+ tdb_off_t free[BUCKETS_FOR_ZONE(INITIAL_ZONE_BITS) + 1];
+ bool all_empty;
+ TDB_DATA k, d;
+
+ k.dptr = (void *)&j;
+ k.dsize = sizeof(j);
+
+ tdb = tdb_open("run-30-exhaust-before-expand.tdb", flags[i],
+ O_RDWR|O_CREAT|O_TRUNC, 0600, &tap_log_attr);
+ ok1(tdb);
+ if (!tdb)
+ continue;
+
+ /* We don't want the hash to expand, so we use one alloc to
+ * chew up over 90% of the space first. */
+ j = -1;
+ d.dsize = (1 << INITIAL_ZONE_BITS) * 9 / 10;
+ d.dptr = malloc(d.dsize);
+ ok1(tdb_store(tdb, k, d, TDB_INSERT) == 0);
+ ok1(tdb->map_size == sizeof(struct tdb_header)
+ + (1 << INITIAL_ZONE_BITS)+1);
+
+ /* Insert minimal-length records until we add a zone. */
+ for (j = 0;
+ tdb->map_size == sizeof(struct tdb_header)
+ + (1 << INITIAL_ZONE_BITS)+1;
+ j++) {
+ if (tdb_store(tdb, k, k, TDB_INSERT) != 0)
+ err(1, "Failed to store record %i", j);
+ }
+
+ /* Now, free list should be completely exhausted in zone 0 */
+ ok1(tdb_read_convert(tdb,
+ sizeof(struct tdb_header)
+ + sizeof(struct free_zone_header),
+ &free, sizeof(free)) == 0);
+
+ all_empty = true;
+ for (j = 0; j < sizeof(free)/sizeof(free[0]); j++) {
+ if (free[j]) {
+ diag("Free bucket %i not empty", j);
+ all_empty = false;
+ }
+ }
+ ok1(all_empty);
+ tdb_close(tdb);
+ }
+
+ ok1(tap_log_messages == 0);
+ return exit_status();
+}