Merge remote-tracking branch 'remotes/armbru/tags/pull-qapi-2021-01-28' into staging

QAPI patches patches for 2021-01-28

# gpg: Signature made Thu 28 Jan 2021 07:10:21 GMT
# gpg:                using RSA key 354BC8B3D7EB2A6B68674E5F3870B400EB918653
# gpg:                issuer "armbru@redhat.com"
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" [full]
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>" [full]
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* remotes/armbru/tags/pull-qapi-2021-01-28:
  qapi: More complex uses of QAPI_LIST_APPEND
  qapi: Use QAPI_LIST_APPEND in trivial cases
  qapi: Introduce QAPI_LIST_APPEND
  qapi: A couple more QAPI_LIST_PREPEND() stragglers
  net: Clarify early exit condition

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

5 files changed, 77 insertions, 137 deletions

diff --git a/hw/acpi/cpu.c b/hw/acpi/cpu.c
index 6350caa765..e2317be546 100644
--- a/hw/acpi/cpu.c
+++ b/hw/acpi/cpu.c
@@ -44,14 +44,11 @@ static ACPIOSTInfo *acpi_cpu_device_status(int idx, AcpiCpuStatus *cdev)
 
 void acpi_cpu_ospm_status(CPUHotplugState *cpu_st, ACPIOSTInfoList ***list)
 {
+    ACPIOSTInfoList ***tail = list;
     int i;
 
     for (i = 0; i < cpu_st->dev_count; i++) {
-        ACPIOSTInfoList *elem = g_new0(ACPIOSTInfoList, 1);
-        elem->value = acpi_cpu_device_status(i, &cpu_st->devs[i]);
-        elem->next = NULL;
-        **list = elem;
-        *list = &elem->next;
+        QAPI_LIST_APPEND(*tail, acpi_cpu_device_status(i, &cpu_st->devs[i]));
     }
 }
 
diff --git a/hw/acpi/memory_hotplug.c b/hw/acpi/memory_hotplug.c
index f2552b2a46..0bdcf15528 100644
--- a/hw/acpi/memory_hotplug.c
+++ b/hw/acpi/memory_hotplug.c
@@ -53,14 +53,12 @@ static ACPIOSTInfo *acpi_memory_device_status(int slot, MemStatus *mdev)
 
 void acpi_memory_ospm_status(MemHotplugState *mem_st, ACPIOSTInfoList ***list)
 {
+    ACPIOSTInfoList ***tail = list;
     int i;
 
     for (i = 0; i < mem_st->dev_count; i++) {
-        ACPIOSTInfoList *elem = g_new0(ACPIOSTInfoList, 1);
-        elem->value = acpi_memory_device_status(i, &mem_st->devs[i]);
-        elem->next = NULL;
-        **list = elem;
-        *list = &elem->next;
+        QAPI_LIST_APPEND(*tail,
+                         acpi_memory_device_status(i, &mem_st->devs[i]));
     }
 }
 
diff --git a/hw/core/machine-qmp-cmds.c b/hw/core/machine-qmp-cmds.c
index affffe0c4a..44e979e503 100644
--- a/hw/core/machine-qmp-cmds.c
+++ b/hw/core/machine-qmp-cmds.c
@@ -28,11 +28,11 @@ CpuInfoList *qmp_query_cpus(Error **errp)
 {
     MachineState *ms = MACHINE(qdev_get_machine());
     MachineClass *mc = MACHINE_GET_CLASS(ms);
-    CpuInfoList *head = NULL, *cur_item = NULL;
+    CpuInfoList *head = NULL, **tail = &head;
     CPUState *cpu;
 
     CPU_FOREACH(cpu) {
-        CpuInfoList *info;
+        CpuInfo *value;
 #if defined(TARGET_I386)
         X86CPU *x86_cpu = X86_CPU(cpu);
         CPUX86State *env = &x86_cpu->env;
@@ -58,53 +58,46 @@ CpuInfoList *qmp_query_cpus(Error **errp)
 
         cpu_synchronize_state(cpu);
 
-        info = g_malloc0(sizeof(*info));
-        info->value = g_malloc0(sizeof(*info->value));
-        info->value->CPU = cpu->cpu_index;
-        info->value->current = (cpu == first_cpu);
-        info->value->halted = cpu->halted;
-        info->value->qom_path = object_get_canonical_path(OBJECT(cpu));
-        info->value->thread_id = cpu->thread_id;
+        value = g_malloc0(sizeof(*value));
+        value->CPU = cpu->cpu_index;
+        value->current = (cpu == first_cpu);
+        value->halted = cpu->halted;
+        value->qom_path = object_get_canonical_path(OBJECT(cpu));
+        value->thread_id = cpu->thread_id;
 #if defined(TARGET_I386)
-        info->value->arch = CPU_INFO_ARCH_X86;
-        info->value->u.x86.pc = env->eip + env->segs[R_CS].base;
+        value->arch = CPU_INFO_ARCH_X86;
+        value->u.x86.pc = env->eip + env->segs[R_CS].base;
 #elif defined(TARGET_PPC)
-        info->value->arch = CPU_INFO_ARCH_PPC;
-        info->value->u.ppc.nip = env->nip;
+        value->arch = CPU_INFO_ARCH_PPC;
+        value->u.ppc.nip = env->nip;
 #elif defined(TARGET_SPARC)
-        info->value->arch = CPU_INFO_ARCH_SPARC;
-        info->value->u.q_sparc.pc = env->pc;
-        info->value->u.q_sparc.npc = env->npc;
+        value->arch = CPU_INFO_ARCH_SPARC;
+        value->u.q_sparc.pc = env->pc;
+        value->u.q_sparc.npc = env->npc;
 #elif defined(TARGET_MIPS)
-        info->value->arch = CPU_INFO_ARCH_MIPS;
-        info->value->u.q_mips.PC = env->active_tc.PC;
+        value->arch = CPU_INFO_ARCH_MIPS;
+        value->u.q_mips.PC = env->active_tc.PC;
 #elif defined(TARGET_TRICORE)
-        info->value->arch = CPU_INFO_ARCH_TRICORE;
-        info->value->u.tricore.PC = env->PC;
+        value->arch = CPU_INFO_ARCH_TRICORE;
+        value->u.tricore.PC = env->PC;
 #elif defined(TARGET_S390X)
-        info->value->arch = CPU_INFO_ARCH_S390;
-        info->value->u.s390.cpu_state = env->cpu_state;
+        value->arch = CPU_INFO_ARCH_S390;
+        value->u.s390.cpu_state = env->cpu_state;
 #elif defined(TARGET_RISCV)
-        info->value->arch = CPU_INFO_ARCH_RISCV;
-        info->value->u.riscv.pc = env->pc;
+        value->arch = CPU_INFO_ARCH_RISCV;
+        value->u.riscv.pc = env->pc;
 #else
-        info->value->arch = CPU_INFO_ARCH_OTHER;
+        value->arch = CPU_INFO_ARCH_OTHER;
 #endif
-        info->value->has_props = !!mc->cpu_index_to_instance_props;
-        if (info->value->has_props) {
+        value->has_props = !!mc->cpu_index_to_instance_props;
+        if (value->has_props) {
             CpuInstanceProperties *props;
             props = g_malloc0(sizeof(*props));
             *props = mc->cpu_index_to_instance_props(ms, cpu->cpu_index);
-            info->value->props = props;
+            value->props = props;
         }
 
-        /* XXX: waiting for the qapi to support GSList */
-        if (!cur_item) {
-            head = cur_item = info;
-        } else {
-            cur_item->next = info;
-            cur_item = info;
-        }
+        QAPI_LIST_APPEND(tail, value);
     }
 
     return head;
@@ -170,39 +163,33 @@ CpuInfoFastList *qmp_query_cpus_fast(Error **errp)
 {
     MachineState *ms = MACHINE(qdev_get_machine());
     MachineClass *mc = MACHINE_GET_CLASS(ms);
-    CpuInfoFastList *head = NULL, *cur_item = NULL;
+    CpuInfoFastList *head = NULL, **tail = &head;
     SysEmuTarget target = qapi_enum_parse(&SysEmuTarget_lookup, TARGET_NAME,
                                           -1, &error_abort);
     CPUState *cpu;
 
     CPU_FOREACH(cpu) {
-        CpuInfoFastList *info = g_malloc0(sizeof(*info));
-        info->value = g_malloc0(sizeof(*info->value));
+        CpuInfoFast *value = g_malloc0(sizeof(*value));
 
-        info->value->cpu_index = cpu->cpu_index;
-        info->value->qom_path = object_get_canonical_path(OBJECT(cpu));
-        info->value->thread_id = cpu->thread_id;
+        value->cpu_index = cpu->cpu_index;
+        value->qom_path = object_get_canonical_path(OBJECT(cpu));
+        value->thread_id = cpu->thread_id;
 
-        info->value->has_props = !!mc->cpu_index_to_instance_props;
-        if (info->value->has_props) {
+        value->has_props = !!mc->cpu_index_to_instance_props;
+        if (value->has_props) {
             CpuInstanceProperties *props;
             props = g_malloc0(sizeof(*props));
             *props = mc->cpu_index_to_instance_props(ms, cpu->cpu_index);
-            info->value->props = props;
+            value->props = props;
         }
 
-        info->value->arch = sysemu_target_to_cpuinfo_arch(target);
-        info->value->target = target;
+        value->arch = sysemu_target_to_cpuinfo_arch(target);
+        value->target = target;
         if (target == SYS_EMU_TARGET_S390X) {
-            cpustate_to_cpuinfo_s390(&info->value->u.s390x, cpu);
+            cpustate_to_cpuinfo_s390(&value->u.s390x, cpu);
         }
 
-        if (!cur_item) {
-            head = cur_item = info;
-        } else {
-            cur_item->next = info;
-            cur_item = info;
-        }
+        QAPI_LIST_APPEND(tail, value);
     }
 
     return head;
@@ -293,41 +280,31 @@ void qmp_set_numa_node(NumaOptions *cmd, Error **errp)
 static int query_memdev(Object *obj, void *opaque)
 {
     MemdevList **list = opaque;
-    MemdevList *m = NULL;
+    Memdev *m;
     QObject *host_nodes;
     Visitor *v;
 
     if (object_dynamic_cast(obj, TYPE_MEMORY_BACKEND)) {
         m = g_malloc0(sizeof(*m));
 
-        m->value = g_malloc0(sizeof(*m->value));
-
-        m->value->id = g_strdup(object_get_canonical_path_component(obj));
-        m->value->has_id = !!m->value->id;
-
-        m->value->size = object_property_get_uint(obj, "size",
-                                                  &error_abort);
-        m->value->merge = object_property_get_bool(obj, "merge",
-                                                   &error_abort);
-        m->value->dump = object_property_get_bool(obj, "dump",
-                                                  &error_abort);
-        m->value->prealloc = object_property_get_bool(obj,
-                                                      "prealloc",
-                                                      &error_abort);
-        m->value->policy = object_property_get_enum(obj,
-                                                    "policy",
-                                                    "HostMemPolicy",
-                                                    &error_abort);
+        m->id = g_strdup(object_get_canonical_path_component(obj));
+        m->has_id = !!m->id;
+
+        m->size = object_property_get_uint(obj, "size", &error_abort);
+        m->merge = object_property_get_bool(obj, "merge", &error_abort);
+        m->dump = object_property_get_bool(obj, "dump", &error_abort);
+        m->prealloc = object_property_get_bool(obj, "prealloc", &error_abort);
+        m->policy = object_property_get_enum(obj, "policy", "HostMemPolicy",
+                                             &error_abort);
         host_nodes = object_property_get_qobject(obj,
                                                  "host-nodes",
                                                  &error_abort);
         v = qobject_input_visitor_new(host_nodes);
-        visit_type_uint16List(v, NULL, &m->value->host_nodes, &error_abort);
+        visit_type_uint16List(v, NULL, &m->host_nodes, &error_abort);
         visit_free(v);
         qobject_unref(host_nodes);
 
-        m->next = *list;
-        *list = m;
+        QAPI_LIST_PREPEND(*list, m);
     }
 
     return 0;
diff --git a/hw/mem/memory-device.c b/hw/mem/memory-device.c
index cf0627fd01..d9f8301711 100644
--- a/hw/mem/memory-device.c
+++ b/hw/mem/memory-device.c
@@ -199,7 +199,7 @@ out:
 MemoryDeviceInfoList *qmp_memory_device_list(void)
 {
     GSList *devices = NULL, *item;
-    MemoryDeviceInfoList *list = NULL, *prev = NULL;
+    MemoryDeviceInfoList *list = NULL, **tail = &list;
 
     object_child_foreach(qdev_get_machine(), memory_device_build_list,
                          &devices);
@@ -207,19 +207,11 @@ MemoryDeviceInfoList *qmp_memory_device_list(void)
     for (item = devices; item; item = g_slist_next(item)) {
         const MemoryDeviceState *md = MEMORY_DEVICE(item->data);
         const MemoryDeviceClass *mdc = MEMORY_DEVICE_GET_CLASS(item->data);
-        MemoryDeviceInfoList *elem = g_new0(MemoryDeviceInfoList, 1);
         MemoryDeviceInfo *info = g_new0(MemoryDeviceInfo, 1);
 
         mdc->fill_device_info(md, info);
 
-        elem->value = info;
-        elem->next = NULL;
-        if (prev) {
-            prev->next = elem;
-        } else {
-            list = elem;
-        }
-        prev = elem;
+        QAPI_LIST_APPEND(tail, info);
     }
 
     g_slist_free(devices);
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index a6b0c5602e..512e9042ff 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -1683,41 +1683,34 @@ static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num);
 
 static PciMemoryRegionList *qmp_query_pci_regions(const PCIDevice *dev)
 {
-    PciMemoryRegionList *head = NULL, *cur_item = NULL;
+    PciMemoryRegionList *head = NULL, **tail = &head;
     int i;
 
     for (i = 0; i < PCI_NUM_REGIONS; i++) {
         const PCIIORegion *r = &dev->io_regions[i];
-        PciMemoryRegionList *region;
+        PciMemoryRegion *region;
 
         if (!r->size) {
             continue;
         }
 
         region = g_malloc0(sizeof(*region));
-        region->value = g_malloc0(sizeof(*region->value));
 
         if (r->type & PCI_BASE_ADDRESS_SPACE_IO) {
-            region->value->type = g_strdup("io");
+            region->type = g_strdup("io");
         } else {
-            region->value->type = g_strdup("memory");
-            region->value->has_prefetch = true;
-            region->value->prefetch = !!(r->type & PCI_BASE_ADDRESS_MEM_PREFETCH);
-            region->value->has_mem_type_64 = true;
-            region->value->mem_type_64 = !!(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64);
+            region->type = g_strdup("memory");
+            region->has_prefetch = true;
+            region->prefetch = !!(r->type & PCI_BASE_ADDRESS_MEM_PREFETCH);
+            region->has_mem_type_64 = true;
+            region->mem_type_64 = !!(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64);
         }
 
-        region->value->bar = i;
-        region->value->address = r->addr;
-        region->value->size = r->size;
+        region->bar = i;
+        region->address = r->addr;
+        region->size = r->size;
 
-        /* XXX: waiting for the qapi to support GSList */
-        if (!cur_item) {
-            head = cur_item = region;
-        } else {
-            cur_item->next = region;
-            cur_item = region;
-        }
+        QAPI_LIST_APPEND(tail, region);
     }
 
     return head;
@@ -1814,23 +1807,14 @@ static PciDeviceInfo *qmp_query_pci_device(PCIDevice *dev, PCIBus *bus,
 
 static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num)
 {
-    PciDeviceInfoList *info, *head = NULL, *cur_item = NULL;
+    PciDeviceInfoList *head = NULL, **tail = &head;
     PCIDevice *dev;
     int devfn;
 
     for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) {
         dev = bus->devices[devfn];
         if (dev) {
-            info = g_malloc0(sizeof(*info));
-            info->value = qmp_query_pci_device(dev, bus, bus_num);
-
-            /* XXX: waiting for the qapi to support GSList */
-            if (!cur_item) {
-                head = cur_item = info;
-            } else {
-                cur_item->next = info;
-                cur_item = info;
-            }
+            QAPI_LIST_APPEND(tail, qmp_query_pci_device(dev, bus, bus_num));
         }
     }
 
@@ -1853,21 +1837,13 @@ static PciInfo *qmp_query_pci_bus(PCIBus *bus, int bus_num)
 
 PciInfoList *qmp_query_pci(Error **errp)
 {
-    PciInfoList *info, *head = NULL, *cur_item = NULL;
+    PciInfoList *head = NULL, **tail = &head;
     PCIHostState *host_bridge;
 
     QLIST_FOREACH(host_bridge, &pci_host_bridges, next) {
-        info = g_malloc0(sizeof(*info));
-        info->value = qmp_query_pci_bus(host_bridge->bus,
-                                        pci_bus_num(host_bridge->bus));
-
-        /* XXX: waiting for the qapi to support GSList */
-        if (!cur_item) {
-            head = cur_item = info;
-        } else {
-            cur_item->next = info;
-            cur_item = info;
-        }
+        QAPI_LIST_APPEND(tail,
+                         qmp_query_pci_bus(host_bridge->bus,
+                                           pci_bus_num(host_bridge->bus)));
     }
 
     return head;