+static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr)
+{
+ while(sub && sub->needed) {
+ if (strcmp(idstr, sub->vmsd->name) == 0) {
+ return sub->vmsd;
+ }
+ sub++;
+ }
+ return NULL;
+}
+
+static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd,
+ void *opaque)
+{
+ const VMStateSubsection *sub = vmsd->subsections;
+
+ if (!sub || !sub->needed) {
+ return 0;
+ }
+
+ while (qemu_peek_byte(f) == QEMU_VM_SUBSECTION) {
+ char idstr[256];
+ int ret;
+ uint8_t version_id, len;
+ const VMStateDescription *sub_vmsd;
+
+ qemu_get_byte(f); /* subsection */
+ len = qemu_get_byte(f);
+ qemu_get_buffer(f, (uint8_t *)idstr, len);
+ idstr[len] = 0;
+ version_id = qemu_get_be32(f);
+
+ sub_vmsd = vmstate_get_subsection(sub, idstr);
+ if (sub_vmsd == NULL) {
+ return -ENOENT;
+ }
+ assert(!sub_vmsd->subsections);
+ ret = vmstate_load_state(f, sub_vmsd, opaque, version_id);
+ if (ret) {
+ return ret;
+ }
+ }
+ return 0;
+}
+
+static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd,
+ void *opaque)
+{
+ const VMStateSubsection *sub = vmsd->subsections;
+
+ while (sub && sub->needed) {
+ if (sub->needed(opaque)) {
+ const VMStateDescription *vmsd = sub->vmsd;
+ uint8_t len;
+
+ qemu_put_byte(f, QEMU_VM_SUBSECTION);
+ len = strlen(vmsd->name);
+ qemu_put_byte(f, len);
+ qemu_put_buffer(f, (uint8_t *)vmsd->name, len);
+ qemu_put_be32(f, vmsd->version_id);
+ assert(!vmsd->subsections);
+ vmstate_save_state(f, vmsd, opaque);
+ }
+ sub++;
+ }
+}
+