+int
+zap_add_int_key(objset_t *os, uint64_t obj,
+ uint64_t key, uint64_t value, dmu_tx_t *tx)
+{
+ char name[20];
+
+ (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key);
+ return (zap_add(os, obj, name, 8, 1, &value, tx));
+}
+
+int
+zap_lookup_int_key(objset_t *os, uint64_t obj, uint64_t key, uint64_t *valuep)
+{
+ char name[20];
+
+ (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key);
+ return (zap_lookup(os, obj, name, 8, 1, valuep));
+}
+
+int
+zap_increment(objset_t *os, uint64_t obj, const char *name, int64_t delta,
+ dmu_tx_t *tx)
+{
+ uint64_t value = 0;
+ int err;
+
+ if (delta == 0)
+ return (0);
+
+ err = zap_lookup(os, obj, name, 8, 1, &value);
+ if (err != 0 && err != ENOENT)
+ return (err);
+ value += delta;
+ if (value == 0)
+ err = zap_remove(os, obj, name, tx);
+ else
+ err = zap_update(os, obj, name, 8, 1, &value, tx);
+ return (err);
+}
+
+int
+zap_increment_int(objset_t *os, uint64_t obj, uint64_t key, int64_t delta,
+ dmu_tx_t *tx)
+{
+ char name[20];
+
+ (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key);
+ return (zap_increment(os, obj, name, delta, tx));
+}
+