qapi qga: Elide redundant has_FOO in generated C

The has_FOO for pointer-valued FOO are redundant, except for arrays.
They are also a nuisance to work with.  Recent commit "qapi: Start to
elide redundant has_FOO in generated C" provided the means to elide
them step by step.  This is the step for qga/qapi-schema.json.

Said commit explains the transformation in more detail.  The invariant
violations mentioned there do not occur here.

Cc: Michael Roth <michael.roth@amd.com>
Cc: Konstantin Kostiuk <kkostiuk@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20221104160712.3005652-30-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

qga/commands-posix.c

@@ -71,7 +71,7 @@ static void ga_wait_child(pid_t pid, int *status, Error **errp)
     g_assert(rpid == pid);
 }
 
-void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp)
+void qmp_guest_shutdown(const char *mode, Error **errp)
 {
     const char *shutdown_flag;
     Error *local_err = NULL;
@@ -93,7 +93,7 @@ void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp)
 #endif
 
     slog("guest-shutdown called, mode: %s", mode);
-    if (!has_mode || strcmp(mode, "powerdown") == 0) {
+    if (!mode || strcmp(mode, "powerdown") == 0) {
         shutdown_flag = powerdown_flag;
     } else if (strcmp(mode, "halt") == 0) {
         shutdown_flag = halt_flag;
@@ -404,14 +404,14 @@ end:
     return f;
 }
 
-int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode,
+int64_t qmp_guest_file_open(const char *path, const char *mode,
                             Error **errp)
 {
     FILE *fh;
     Error *local_err = NULL;
     int64_t handle;
 
-    if (!has_mode) {
+    if (!mode) {
         mode = "r";
     }
     slog("guest-file-open called, filepath: %s, mode: %s", path, mode);
@@ -1037,7 +1037,6 @@ static bool build_guest_fsinfo_for_ccw_dev(char const *syspath,
         return false;
     }
 
-    disk->has_ccw_address = true;
     disk->ccw_address = g_new0(GuestCCWAddress, 1);
     disk->ccw_address->cssid = cssid;
     disk->ccw_address->ssid = ssid;
@@ -1084,12 +1083,10 @@ static void build_guest_fsinfo_for_real_device(char const *syspath,
         devnode = udev_device_get_devnode(udevice);
         if (devnode != NULL) {
             disk->dev = g_strdup(devnode);
-            disk->has_dev = true;
         }
         serial = udev_device_get_property_value(udevice, "ID_SERIAL");
         if (serial != NULL && *serial != 0) {
             disk->serial = g_strdup(serial);
-            disk->has_serial = true;
         }
     }
 
@@ -1108,7 +1105,7 @@ static void build_guest_fsinfo_for_real_device(char const *syspath,
         has_hwinf = false;
     }
 
-    if (has_hwinf || disk->has_dev || disk->has_serial) {
+    if (has_hwinf || disk->dev || disk->serial) {
         QAPI_LIST_PREPEND(fs->disk, disk);
     } else {
         qapi_free_GuestDiskAddress(disk);
@@ -1411,7 +1408,6 @@ static void get_nvme_smart(GuestDiskInfo *disk)
         return;
     }
 
-    disk->has_smart = true;
     disk->smart = g_new0(GuestDiskSmart, 1);
     disk->smart->type = GUEST_DISK_BUS_TYPE_NVME;
 
@@ -1449,7 +1445,7 @@ static void get_nvme_smart(GuestDiskInfo *disk)
 
 static void get_disk_smart(GuestDiskInfo *disk)
 {
-    if (disk->has_address
+    if (disk->address
         && (disk->address->bus_type == GUEST_DISK_BUS_TYPE_NVME)) {
         get_nvme_smart(disk);
     }
@@ -1502,7 +1498,6 @@ GuestDiskInfoList *qmp_guest_get_disks(Error **errp)
         disk->name = dev_name;
         disk->partition = false;
         disk->alias = get_alias_for_syspath(disk_dir);
-        disk->has_alias = (disk->alias != NULL);
         QAPI_LIST_PREPEND(ret, disk);
 
         /* Get address for non-virtual devices */
@@ -1522,8 +1517,6 @@ GuestDiskInfoList *qmp_guest_get_disks(Error **errp)
                     error_get_pretty(local_err));
                 error_free(local_err);
                 local_err = NULL;
-            } else if (disk->address != NULL) {
-                disk->has_address = true;
             }
         }
 
@@ -1641,7 +1634,6 @@ qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
         if (fd == -1) {
             result->error = g_strdup_printf("failed to open: %s",
                                             strerror(errno));
-            result->has_error = true;
             continue;
         }
 
@@ -1656,7 +1648,6 @@ qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
         r.minlen = has_minimum ? minimum : 0;
         ret = ioctl(fd, FITRIM, &r);
         if (ret == -1) {
-            result->has_error = true;
             if (errno == ENOTTY || errno == EOPNOTSUPP) {
                 result->error = g_strdup("trim not supported");
             } else {
@@ -2967,7 +2958,7 @@ GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
             QAPI_LIST_APPEND(tail, info);
         }
 
-        if (!info->has_hardware_address) {
+        if (!info->hardware_address) {
             if (!guest_get_hw_addr(ifa, mac_addr, &obtained, errp)) {
                 goto error;
             }
@@ -2977,7 +2968,6 @@ GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
                                     (int) mac_addr[0], (int) mac_addr[1],
                                     (int) mac_addr[2], (int) mac_addr[3],
                                     (int) mac_addr[4], (int) mac_addr[5]);
-                info->has_hardware_address = true;
             }
         }
 
@@ -3037,14 +3027,12 @@ GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
 
         info->has_ip_addresses = true;
 
-        if (!info->has_statistics) {
+        if (!info->statistics) {
             interface_stat = g_malloc0(sizeof(*interface_stat));
             if (guest_get_network_stats(info->name, interface_stat) == -1) {
-                info->has_statistics = false;
                 g_free(interface_stat);
             } else {
                 info->statistics = interface_stat;
-                info->has_statistics = true;
             }
         }
     }
@@ -3351,11 +3339,8 @@ GuestOSInfo *qmp_guest_get_osinfo(Error **errp)
     if (uname(&kinfo) != 0) {
         error_setg_errno(errp, errno, "uname failed");
     } else {
-        info->has_kernel_version = true;
         info->kernel_version = g_strdup(kinfo.version);
-        info->has_kernel_release = true;
         info->kernel_release = g_strdup(kinfo.release);
-        info->has_machine = true;
         info->machine = g_strdup(kinfo.machine);
     }
 
@@ -3375,7 +3360,6 @@ GuestOSInfo *qmp_guest_get_osinfo(Error **errp)
     value = g_key_file_get_value(osrelease, "os-release", osfield, NULL); \
     if (value != NULL) { \
         ga_osrelease_replace_special(value); \
-        info->has_ ## field = true; \
         info->field = value; \
     } \
 } while (0)

qga/commands-win32.c

@@ -193,8 +193,7 @@ static void handle_set_nonblocking(HANDLE fh)
     SetNamedPipeHandleState(fh, &pipe_state, NULL, NULL);
 }
 
-int64_t qmp_guest_file_open(const char *path, bool has_mode,
-                            const char *mode, Error **errp)
+int64_t qmp_guest_file_open(const char *path, const char *mode, Error **errp)
 {
     int64_t fd = -1;
     HANDLE fh;
@@ -206,7 +205,7 @@ int64_t qmp_guest_file_open(const char *path, bool has_mode,
     GError *gerr = NULL;
     wchar_t *w_path = NULL;
 
-    if (!has_mode) {
+    if (!mode) {
         mode = "r";
     }
     slog("guest-file-open called, filepath: %s, mode: %s", path, mode);
@@ -317,14 +316,14 @@ static void execute_async(DWORD WINAPI (*func)(LPVOID), LPVOID opaque,
     }
 }
 
-void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp)
+void qmp_guest_shutdown(const char *mode, Error **errp)
 {
     Error *local_err = NULL;
     UINT shutdown_flag = EWX_FORCE;
 
     slog("guest-shutdown called, mode: %s", mode);
 
-    if (!has_mode || strcmp(mode, "powerdown") == 0) {
+    if (!mode || strcmp(mode, "powerdown") == 0) {
         shutdown_flag |= EWX_POWEROFF;
     } else if (strcmp(mode, "halt") == 0) {
         shutdown_flag |= EWX_SHUTDOWN;
@@ -833,7 +832,6 @@ static void get_disk_properties(HANDLE vol_h, GuestDiskAddress *disk,
         g_debug("serial number \"%s\"", serial);
         if (*serial != 0) {
             disk->serial = g_strndup(serial, len);
-            disk->has_serial = true;
         }
     }
 out_free:
@@ -951,7 +949,6 @@ static GuestDiskAddressList *build_guest_disk_info(char *guid, Error **errp)
             /* Possibly CD-ROM or a shared drive. Try to pass the volume */
             g_debug("volume not on disk");
             disk = g_new0(GuestDiskAddress, 1);
-            disk->has_dev = true;
             disk->dev = g_strdup(name);
             get_single_disk_info(0xffffffff, disk, &local_err);
             if (local_err) {
@@ -983,7 +980,6 @@ static GuestDiskAddressList *build_guest_disk_info(char *guid, Error **errp)
          * See also Naming Files, Paths and Namespaces:
          * https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file#win32-device-namespaces
          */
-        disk->has_dev = true;
         disk->dev = g_strdup_printf("\\\\.\\PhysicalDrive%lu",
                                     extents->Extents[i].DiskNumber);
 
@@ -1078,7 +1074,6 @@ GuestDiskInfoList *qmp_guest_get_disks(Error **errp)
 
         g_debug("  number: %lu", sdn.DeviceNumber);
         address = g_new0(GuestDiskAddress, 1);
-        address->has_dev = true;
         address->dev = g_strdup(disk->name);
         get_single_disk_info(sdn.DeviceNumber, address, &local_err);
         if (local_err) {
@@ -1089,7 +1084,6 @@ GuestDiskInfoList *qmp_guest_get_disks(Error **errp)
             address = NULL;
         } else {
             disk->address = address;
-            disk->has_address = true;
         }
 
         QAPI_LIST_PREPEND(ret, disk);
@@ -1369,7 +1363,6 @@ qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
         g_free(uc_path);
 
         if (!path) {
-            res->has_error = true;
             res->error = g_strdup(gerr->message);
             g_error_free(gerr);
             break;
@@ -1387,7 +1380,6 @@ qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
         if (!g_spawn_sync(NULL, argv, NULL, G_SPAWN_SEARCH_PATH, NULL, NULL,
                           &out /* stdout */, NULL /* stdin */,
                           NULL, &gerr)) {
-            res->has_error = true;
             res->error = g_strdup(gerr->message);
             g_error_free(gerr);
         } else {
@@ -1403,7 +1395,6 @@ qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
                 if (g_strstr_len(lines[i], -1, "(0x") == NULL) {
                     continue;
                 }
-                res->has_error = true;
                 res->error = g_strdup(lines[i]);
                 break;
             }
@@ -1683,8 +1674,6 @@ GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
                                 (int) mac_addr[0], (int) mac_addr[1],
                                 (int) mac_addr[2], (int) mac_addr[3],
                                 (int) mac_addr[4], (int) mac_addr[5]);
-
-            info->has_hardware_address = true;
         }
 
         head_addr = NULL;
@@ -1713,15 +1702,13 @@ GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
             info->has_ip_addresses = true;
             info->ip_addresses = head_addr;
         }
-        if (!info->has_statistics) {
+        if (!info->statistics) {
             interface_stat = g_malloc0(sizeof(*interface_stat));
-            if (guest_get_network_stats(addr->AdapterName,
-                interface_stat) == -1) {
-                info->has_statistics = false;
+            if (guest_get_network_stats(addr->AdapterName, interface_stat)
+                == -1) {
                 g_free(interface_stat);
             } else {
                 info->statistics = interface_stat;
-                info->has_statistics = true;
             }
         }
     }
@@ -2113,7 +2100,6 @@ GuestUserList *qmp_guest_get_users(Error **errp)
 
                     user->user = g_strdup(info->UserName);
                     user->domain = g_strdup(info->Domain);
-                    user->has_domain = true;
 
                     user->login_time = login_time;
 
@@ -2332,29 +2318,19 @@ GuestOSInfo *qmp_guest_get_osinfo(Error **errp)
 
     info = g_new0(GuestOSInfo, 1);
 
-    info->has_kernel_version = true;
     info->kernel_version = g_strdup_printf("%lu.%lu",
         os_version.dwMajorVersion,
         os_version.dwMinorVersion);
-    info->has_kernel_release = true;
     info->kernel_release = g_strdup_printf("%lu",
         os_version.dwBuildNumber);
-    info->has_machine = true;
     info->machine = ga_get_current_arch();
 
-    info->has_id = true;
     info->id = g_strdup("mswindows");
-    info->has_name = true;
     info->name = g_strdup("Microsoft Windows");
-    info->has_pretty_name = true;
     info->pretty_name = product_name;
-    info->has_version = true;
     info->version = ga_get_win_name(&os_version, false);
-    info->has_version_id = true;
     info->version_id = ga_get_win_name(&os_version, true);
-    info->has_variant = true;
     info->variant = g_strdup(server ? "server" : "client");
-    info->has_variant_id = true;
     info->variant_id = g_strdup(server ? "server" : "client");
 
     return info;
@@ -2478,7 +2454,6 @@ GuestDeviceInfoList *qmp_guest_get_devices(Error **errp)
             device_id = g_match_info_fetch(match_info, 2);
 
             device->id = g_new0(GuestDeviceId, 1);
-            device->has_id = true;
             device->id->type = GUEST_DEVICE_TYPE_PCI;
             id = &device->id->u.pci;
             id->vendor_id = g_ascii_strtoull(vendor_id, NULL, 16);
@@ -2502,7 +2477,6 @@ GuestDeviceInfoList *qmp_guest_get_devices(Error **errp)
             error_setg(errp, "conversion to utf8 failed (driver version)");
             return NULL;
         }
-        device->has_driver_version = true;
 
         date = (LPFILETIME)cm_get_property(dev_info_data.DevInst,
             &qga_DEVPKEY_Device_DriverDate, &cm_type);

qga/commands.c

@@ -206,14 +206,12 @@ GuestExecStatus *qmp_guest_exec_status(int64_t pid, Error **errp)
         }
 #endif
         if (gei->out.length > 0) {
-            ges->has_out_data = true;
             ges->out_data = g_base64_encode(gei->out.data, gei->out.length);
             g_free(gei->out.data);
             ges->has_out_truncated = gei->out.truncated;
         }
 
         if (gei->err.length > 0) {
-            ges->has_err_data = true;
             ges->err_data = g_base64_encode(gei->err.data, gei->err.length);
             g_free(gei->err.data);
             ges->has_err_truncated = gei->err.truncated;
@@ -385,7 +383,7 @@ close:
 GuestExec *qmp_guest_exec(const char *path,
                        bool has_arg, strList *arg,
                        bool has_env, strList *env,
-                       bool has_input_data, const char *input_data,
+                       const char *input_data,
                        bool has_capture_output, bool capture_output,
                        Error **errp)
 {
@@ -406,7 +404,7 @@ GuestExec *qmp_guest_exec(const char *path,
     arglist.value = (char *)path;
     arglist.next = has_arg ? arg : NULL;
 
-    if (has_input_data) {
+    if (input_data) {
         input = qbase64_decode(input_data, -1, &ninput, errp);
         if (!input) {
             return NULL;
@@ -423,7 +421,7 @@ GuestExec *qmp_guest_exec(const char *path,
     }
 
     ret = g_spawn_async_with_pipes(NULL, argv, envp, flags,
-            guest_exec_task_setup, NULL, &pid, has_input_data ? &in_fd : NULL,
+            guest_exec_task_setup, NULL, &pid, input_data ? &in_fd : NULL,
             has_output ? &out_fd : NULL, has_output ? &err_fd : NULL, &gerr);
     if (!ret) {
         error_setg(errp, QERR_QGA_COMMAND_FAILED, gerr->message);
@@ -438,7 +436,7 @@ GuestExec *qmp_guest_exec(const char *path,
     gei->has_output = has_output;
     g_child_watch_add(pid, guest_exec_child_watch, gei);
 
-    if (has_input_data) {
+    if (input_data) {
         gei->in.data = g_steal_pointer(&input);
         gei->in.size = ninput;
 #ifdef G_OS_WIN32
@@ -547,7 +545,6 @@ GuestTimezone *qmp_guest_get_timezone(Error **errp)
     info->offset = g_time_zone_get_offset(tz, intv);
     name = g_time_zone_get_abbreviation(tz, intv);
     if (name != NULL) {
-        info->has_zone = true;
         info->zone = g_strdup(name);
     }
     g_time_zone_unref(tz);

scripts/qapi/schema.py

@@ -758,8 +758,7 @@ def __init__(self, name, info, typ, optional, ifcond=None, features=None):
     def need_has(self):
         assert self.type
         # Temporary hack to support dropping the has_FOO in reviewable chunks
-        opt_out = [
-            'qga/qapi-schema.json']
+        opt_out = []
         if self.info and any(self.info.fname.endswith(mod)
                              for mod in opt_out):
             return self.optional