1be8d8537SStefan Hajnoczi /* 2be8d8537SStefan Hajnoczi * Event loop thread 3be8d8537SStefan Hajnoczi * 4be8d8537SStefan Hajnoczi * Copyright Red Hat Inc., 2013 5be8d8537SStefan Hajnoczi * 6be8d8537SStefan Hajnoczi * Authors: 7be8d8537SStefan Hajnoczi * Stefan Hajnoczi <stefanha@redhat.com> 8be8d8537SStefan Hajnoczi * 9be8d8537SStefan Hajnoczi * This work is licensed under the terms of the GNU GPL, version 2 or later. 10be8d8537SStefan Hajnoczi * See the COPYING file in the top-level directory. 11be8d8537SStefan Hajnoczi * 12be8d8537SStefan Hajnoczi */ 13be8d8537SStefan Hajnoczi 14d38ea87aSPeter Maydell #include "qemu/osdep.h" 15be8d8537SStefan Hajnoczi #include "qom/object.h" 16be8d8537SStefan Hajnoczi #include "qom/object_interfaces.h" 17be8d8537SStefan Hajnoczi #include "qemu/module.h" 18be8d8537SStefan Hajnoczi #include "block/aio.h" 19d16341faSPaolo Bonzini #include "block/block.h" 20be8d8537SStefan Hajnoczi #include "sysemu/iothread.h" 21dc3dd0d2SStefan Hajnoczi #include "qmp-commands.h" 222f78e491SChrysostomos Nanakos #include "qemu/error-report.h" 23ab28bd23SPaolo Bonzini #include "qemu/rcu.h" 24e4370165SPaolo Bonzini #include "qemu/main-loop.h" 25be8d8537SStefan Hajnoczi 26be8d8537SStefan Hajnoczi typedef ObjectClass IOThreadClass; 27be8d8537SStefan Hajnoczi 28be8d8537SStefan Hajnoczi #define IOTHREAD_GET_CLASS(obj) \ 29be8d8537SStefan Hajnoczi OBJECT_GET_CLASS(IOThreadClass, obj, TYPE_IOTHREAD) 30be8d8537SStefan Hajnoczi #define IOTHREAD_CLASS(klass) \ 31be8d8537SStefan Hajnoczi OBJECT_CLASS_CHECK(IOThreadClass, klass, TYPE_IOTHREAD) 32be8d8537SStefan Hajnoczi 33cdd7abfdSStefan Hajnoczi /* Benchmark results from 2016 on NVMe SSD drives show max polling times around 34cdd7abfdSStefan Hajnoczi * 16-32 microseconds yield IOPS improvements for both iodepth=1 and iodepth=32 35cdd7abfdSStefan Hajnoczi * workloads. 36cdd7abfdSStefan Hajnoczi */ 37cdd7abfdSStefan Hajnoczi #define IOTHREAD_POLL_MAX_NS_DEFAULT 32768ULL 38cdd7abfdSStefan Hajnoczi 39e4370165SPaolo Bonzini static __thread IOThread *my_iothread; 40e4370165SPaolo Bonzini 41e4370165SPaolo Bonzini AioContext *qemu_get_current_aio_context(void) 42e4370165SPaolo Bonzini { 43e4370165SPaolo Bonzini return my_iothread ? my_iothread->ctx : qemu_get_aio_context(); 44e4370165SPaolo Bonzini } 45e4370165SPaolo Bonzini 46be8d8537SStefan Hajnoczi static void *iothread_run(void *opaque) 47be8d8537SStefan Hajnoczi { 48be8d8537SStefan Hajnoczi IOThread *iothread = opaque; 49be8d8537SStefan Hajnoczi 50ab28bd23SPaolo Bonzini rcu_register_thread(); 51ab28bd23SPaolo Bonzini 52e4370165SPaolo Bonzini my_iothread = iothread; 5388eb7c29SStefan Hajnoczi qemu_mutex_lock(&iothread->init_done_lock); 5488eb7c29SStefan Hajnoczi iothread->thread_id = qemu_get_thread_id(); 5588eb7c29SStefan Hajnoczi qemu_cond_signal(&iothread->init_done_cond); 5688eb7c29SStefan Hajnoczi qemu_mutex_unlock(&iothread->init_done_lock); 5788eb7c29SStefan Hajnoczi 5865c1b5b6SPaolo Bonzini while (!atomic_read(&iothread->stopping)) { 5965c1b5b6SPaolo Bonzini aio_poll(iothread->ctx, true); 60329163cbSWang Yong 61329163cbSWang Yong if (atomic_read(&iothread->worker_context)) { 62329163cbSWang Yong GMainLoop *loop; 63329163cbSWang Yong 64329163cbSWang Yong g_main_context_push_thread_default(iothread->worker_context); 65329163cbSWang Yong iothread->main_loop = 66329163cbSWang Yong g_main_loop_new(iothread->worker_context, TRUE); 67329163cbSWang Yong loop = iothread->main_loop; 68329163cbSWang Yong 69329163cbSWang Yong g_main_loop_run(iothread->main_loop); 70329163cbSWang Yong iothread->main_loop = NULL; 71329163cbSWang Yong g_main_loop_unref(loop); 72329163cbSWang Yong 73329163cbSWang Yong g_main_context_pop_thread_default(iothread->worker_context); 74329163cbSWang Yong } 75be8d8537SStefan Hajnoczi } 76ab28bd23SPaolo Bonzini 77ab28bd23SPaolo Bonzini rcu_unregister_thread(); 78be8d8537SStefan Hajnoczi return NULL; 79be8d8537SStefan Hajnoczi } 80be8d8537SStefan Hajnoczi 8182d90705SPeter Xu void iothread_stop(IOThread *iothread) 82be8d8537SStefan Hajnoczi { 8382d90705SPeter Xu if (!iothread->ctx || iothread->stopping) { 8482d90705SPeter Xu return; 852f78e491SChrysostomos Nanakos } 86be8d8537SStefan Hajnoczi iothread->stopping = true; 87be8d8537SStefan Hajnoczi aio_notify(iothread->ctx); 88329163cbSWang Yong if (atomic_read(&iothread->main_loop)) { 89329163cbSWang Yong g_main_loop_quit(iothread->main_loop); 90329163cbSWang Yong } 91be8d8537SStefan Hajnoczi qemu_thread_join(&iothread->thread); 9282d90705SPeter Xu } 9382d90705SPeter Xu 9482d90705SPeter Xu static int iothread_stop_iter(Object *object, void *opaque) 9582d90705SPeter Xu { 9682d90705SPeter Xu IOThread *iothread; 9782d90705SPeter Xu 9882d90705SPeter Xu iothread = (IOThread *)object_dynamic_cast(object, TYPE_IOTHREAD); 9982d90705SPeter Xu if (!iothread) { 10082d90705SPeter Xu return 0; 10182d90705SPeter Xu } 10282d90705SPeter Xu iothread_stop(iothread); 103dce8921bSFam Zheng return 0; 104dce8921bSFam Zheng } 105dce8921bSFam Zheng 106cdd7abfdSStefan Hajnoczi static void iothread_instance_init(Object *obj) 107cdd7abfdSStefan Hajnoczi { 108cdd7abfdSStefan Hajnoczi IOThread *iothread = IOTHREAD(obj); 109cdd7abfdSStefan Hajnoczi 110cdd7abfdSStefan Hajnoczi iothread->poll_max_ns = IOTHREAD_POLL_MAX_NS_DEFAULT; 111cdd7abfdSStefan Hajnoczi } 112cdd7abfdSStefan Hajnoczi 113dce8921bSFam Zheng static void iothread_instance_finalize(Object *obj) 114dce8921bSFam Zheng { 115dce8921bSFam Zheng IOThread *iothread = IOTHREAD(obj); 116dce8921bSFam Zheng 11782d90705SPeter Xu iothread_stop(iothread); 118*5b3ac23fSPeter Xu if (iothread->worker_context) { 119*5b3ac23fSPeter Xu g_main_context_unref(iothread->worker_context); 120*5b3ac23fSPeter Xu iothread->worker_context = NULL; 121*5b3ac23fSPeter Xu } 12288eb7c29SStefan Hajnoczi qemu_cond_destroy(&iothread->init_done_cond); 12388eb7c29SStefan Hajnoczi qemu_mutex_destroy(&iothread->init_done_lock); 124eb7b5c35SLin Ma if (!iothread->ctx) { 125eb7b5c35SLin Ma return; 126eb7b5c35SLin Ma } 127be8d8537SStefan Hajnoczi aio_context_unref(iothread->ctx); 128be8d8537SStefan Hajnoczi } 129be8d8537SStefan Hajnoczi 130be8d8537SStefan Hajnoczi static void iothread_complete(UserCreatable *obj, Error **errp) 131be8d8537SStefan Hajnoczi { 1322f78e491SChrysostomos Nanakos Error *local_error = NULL; 133be8d8537SStefan Hajnoczi IOThread *iothread = IOTHREAD(obj); 134d21e8776SPaolo Bonzini char *name, *thread_name; 135be8d8537SStefan Hajnoczi 136be8d8537SStefan Hajnoczi iothread->stopping = false; 13788eb7c29SStefan Hajnoczi iothread->thread_id = -1; 1382f78e491SChrysostomos Nanakos iothread->ctx = aio_context_new(&local_error); 1392f78e491SChrysostomos Nanakos if (!iothread->ctx) { 1402f78e491SChrysostomos Nanakos error_propagate(errp, local_error); 1412f78e491SChrysostomos Nanakos return; 1422f78e491SChrysostomos Nanakos } 14388eb7c29SStefan Hajnoczi 1445e5db499SStefan Hajnoczi aio_context_set_poll_params(iothread->ctx, 1455e5db499SStefan Hajnoczi iothread->poll_max_ns, 1465e5db499SStefan Hajnoczi iothread->poll_grow, 1475e5db499SStefan Hajnoczi iothread->poll_shrink, 1480d9d86fbSStefan Hajnoczi &local_error); 1490d9d86fbSStefan Hajnoczi if (local_error) { 1500d9d86fbSStefan Hajnoczi error_propagate(errp, local_error); 1510d9d86fbSStefan Hajnoczi aio_context_unref(iothread->ctx); 1520d9d86fbSStefan Hajnoczi iothread->ctx = NULL; 1530d9d86fbSStefan Hajnoczi return; 1540d9d86fbSStefan Hajnoczi } 1550d9d86fbSStefan Hajnoczi 15688eb7c29SStefan Hajnoczi qemu_mutex_init(&iothread->init_done_lock); 15788eb7c29SStefan Hajnoczi qemu_cond_init(&iothread->init_done_cond); 158329163cbSWang Yong iothread->once = (GOnce) G_ONCE_INIT; 159be8d8537SStefan Hajnoczi 160be8d8537SStefan Hajnoczi /* This assumes we are called from a thread with useful CPU affinity for us 161be8d8537SStefan Hajnoczi * to inherit. 162be8d8537SStefan Hajnoczi */ 163d21e8776SPaolo Bonzini name = object_get_canonical_path_component(OBJECT(obj)); 164d21e8776SPaolo Bonzini thread_name = g_strdup_printf("IO %s", name); 165d21e8776SPaolo Bonzini qemu_thread_create(&iothread->thread, thread_name, iothread_run, 166be8d8537SStefan Hajnoczi iothread, QEMU_THREAD_JOINABLE); 167d21e8776SPaolo Bonzini g_free(thread_name); 168d21e8776SPaolo Bonzini g_free(name); 16988eb7c29SStefan Hajnoczi 17088eb7c29SStefan Hajnoczi /* Wait for initialization to complete */ 17188eb7c29SStefan Hajnoczi qemu_mutex_lock(&iothread->init_done_lock); 17288eb7c29SStefan Hajnoczi while (iothread->thread_id == -1) { 17388eb7c29SStefan Hajnoczi qemu_cond_wait(&iothread->init_done_cond, 17488eb7c29SStefan Hajnoczi &iothread->init_done_lock); 17588eb7c29SStefan Hajnoczi } 17688eb7c29SStefan Hajnoczi qemu_mutex_unlock(&iothread->init_done_lock); 177be8d8537SStefan Hajnoczi } 178be8d8537SStefan Hajnoczi 1795e5db499SStefan Hajnoczi typedef struct { 1805e5db499SStefan Hajnoczi const char *name; 1815e5db499SStefan Hajnoczi ptrdiff_t offset; /* field's byte offset in IOThread struct */ 1825e5db499SStefan Hajnoczi } PollParamInfo; 1835e5db499SStefan Hajnoczi 1845e5db499SStefan Hajnoczi static PollParamInfo poll_max_ns_info = { 1855e5db499SStefan Hajnoczi "poll-max-ns", offsetof(IOThread, poll_max_ns), 1865e5db499SStefan Hajnoczi }; 1875e5db499SStefan Hajnoczi static PollParamInfo poll_grow_info = { 1885e5db499SStefan Hajnoczi "poll-grow", offsetof(IOThread, poll_grow), 1895e5db499SStefan Hajnoczi }; 1905e5db499SStefan Hajnoczi static PollParamInfo poll_shrink_info = { 1915e5db499SStefan Hajnoczi "poll-shrink", offsetof(IOThread, poll_shrink), 1925e5db499SStefan Hajnoczi }; 1935e5db499SStefan Hajnoczi 1945e5db499SStefan Hajnoczi static void iothread_get_poll_param(Object *obj, Visitor *v, 1950d9d86fbSStefan Hajnoczi const char *name, void *opaque, Error **errp) 1960d9d86fbSStefan Hajnoczi { 1970d9d86fbSStefan Hajnoczi IOThread *iothread = IOTHREAD(obj); 1985e5db499SStefan Hajnoczi PollParamInfo *info = opaque; 1995e5db499SStefan Hajnoczi int64_t *field = (void *)iothread + info->offset; 2000d9d86fbSStefan Hajnoczi 2015e5db499SStefan Hajnoczi visit_type_int64(v, name, field, errp); 2020d9d86fbSStefan Hajnoczi } 2030d9d86fbSStefan Hajnoczi 2045e5db499SStefan Hajnoczi static void iothread_set_poll_param(Object *obj, Visitor *v, 2050d9d86fbSStefan Hajnoczi const char *name, void *opaque, Error **errp) 2060d9d86fbSStefan Hajnoczi { 2070d9d86fbSStefan Hajnoczi IOThread *iothread = IOTHREAD(obj); 2085e5db499SStefan Hajnoczi PollParamInfo *info = opaque; 2095e5db499SStefan Hajnoczi int64_t *field = (void *)iothread + info->offset; 2100d9d86fbSStefan Hajnoczi Error *local_err = NULL; 2110d9d86fbSStefan Hajnoczi int64_t value; 2120d9d86fbSStefan Hajnoczi 2130d9d86fbSStefan Hajnoczi visit_type_int64(v, name, &value, &local_err); 2140d9d86fbSStefan Hajnoczi if (local_err) { 2150d9d86fbSStefan Hajnoczi goto out; 2160d9d86fbSStefan Hajnoczi } 2170d9d86fbSStefan Hajnoczi 2180d9d86fbSStefan Hajnoczi if (value < 0) { 2195e5db499SStefan Hajnoczi error_setg(&local_err, "%s value must be in range [0, %"PRId64"]", 2205e5db499SStefan Hajnoczi info->name, INT64_MAX); 2210d9d86fbSStefan Hajnoczi goto out; 2220d9d86fbSStefan Hajnoczi } 2230d9d86fbSStefan Hajnoczi 2245e5db499SStefan Hajnoczi *field = value; 2250d9d86fbSStefan Hajnoczi 2260d9d86fbSStefan Hajnoczi if (iothread->ctx) { 2275e5db499SStefan Hajnoczi aio_context_set_poll_params(iothread->ctx, 2285e5db499SStefan Hajnoczi iothread->poll_max_ns, 2295e5db499SStefan Hajnoczi iothread->poll_grow, 2305e5db499SStefan Hajnoczi iothread->poll_shrink, 2315e5db499SStefan Hajnoczi &local_err); 2320d9d86fbSStefan Hajnoczi } 2330d9d86fbSStefan Hajnoczi 2340d9d86fbSStefan Hajnoczi out: 2350d9d86fbSStefan Hajnoczi error_propagate(errp, local_err); 2360d9d86fbSStefan Hajnoczi } 2370d9d86fbSStefan Hajnoczi 238be8d8537SStefan Hajnoczi static void iothread_class_init(ObjectClass *klass, void *class_data) 239be8d8537SStefan Hajnoczi { 240be8d8537SStefan Hajnoczi UserCreatableClass *ucc = USER_CREATABLE_CLASS(klass); 241be8d8537SStefan Hajnoczi ucc->complete = iothread_complete; 2420d9d86fbSStefan Hajnoczi 2430d9d86fbSStefan Hajnoczi object_class_property_add(klass, "poll-max-ns", "int", 2445e5db499SStefan Hajnoczi iothread_get_poll_param, 2455e5db499SStefan Hajnoczi iothread_set_poll_param, 2465e5db499SStefan Hajnoczi NULL, &poll_max_ns_info, &error_abort); 2475e5db499SStefan Hajnoczi object_class_property_add(klass, "poll-grow", "int", 2485e5db499SStefan Hajnoczi iothread_get_poll_param, 2495e5db499SStefan Hajnoczi iothread_set_poll_param, 2505e5db499SStefan Hajnoczi NULL, &poll_grow_info, &error_abort); 2515e5db499SStefan Hajnoczi object_class_property_add(klass, "poll-shrink", "int", 2525e5db499SStefan Hajnoczi iothread_get_poll_param, 2535e5db499SStefan Hajnoczi iothread_set_poll_param, 2545e5db499SStefan Hajnoczi NULL, &poll_shrink_info, &error_abort); 255be8d8537SStefan Hajnoczi } 256be8d8537SStefan Hajnoczi 257be8d8537SStefan Hajnoczi static const TypeInfo iothread_info = { 258be8d8537SStefan Hajnoczi .name = TYPE_IOTHREAD, 259be8d8537SStefan Hajnoczi .parent = TYPE_OBJECT, 260be8d8537SStefan Hajnoczi .class_init = iothread_class_init, 261be8d8537SStefan Hajnoczi .instance_size = sizeof(IOThread), 262cdd7abfdSStefan Hajnoczi .instance_init = iothread_instance_init, 263be8d8537SStefan Hajnoczi .instance_finalize = iothread_instance_finalize, 264be8d8537SStefan Hajnoczi .interfaces = (InterfaceInfo[]) { 265be8d8537SStefan Hajnoczi {TYPE_USER_CREATABLE}, 266be8d8537SStefan Hajnoczi {} 267be8d8537SStefan Hajnoczi }, 268be8d8537SStefan Hajnoczi }; 269be8d8537SStefan Hajnoczi 270be8d8537SStefan Hajnoczi static void iothread_register_types(void) 271be8d8537SStefan Hajnoczi { 272be8d8537SStefan Hajnoczi type_register_static(&iothread_info); 273be8d8537SStefan Hajnoczi } 274be8d8537SStefan Hajnoczi 275be8d8537SStefan Hajnoczi type_init(iothread_register_types) 276be8d8537SStefan Hajnoczi 277be8d8537SStefan Hajnoczi char *iothread_get_id(IOThread *iothread) 278be8d8537SStefan Hajnoczi { 279be8d8537SStefan Hajnoczi return object_get_canonical_path_component(OBJECT(iothread)); 280be8d8537SStefan Hajnoczi } 281be8d8537SStefan Hajnoczi 282be8d8537SStefan Hajnoczi AioContext *iothread_get_aio_context(IOThread *iothread) 283be8d8537SStefan Hajnoczi { 284be8d8537SStefan Hajnoczi return iothread->ctx; 285be8d8537SStefan Hajnoczi } 286dc3dd0d2SStefan Hajnoczi 287dc3dd0d2SStefan Hajnoczi static int query_one_iothread(Object *object, void *opaque) 288dc3dd0d2SStefan Hajnoczi { 289dc3dd0d2SStefan Hajnoczi IOThreadInfoList ***prev = opaque; 290dc3dd0d2SStefan Hajnoczi IOThreadInfoList *elem; 291dc3dd0d2SStefan Hajnoczi IOThreadInfo *info; 292dc3dd0d2SStefan Hajnoczi IOThread *iothread; 293dc3dd0d2SStefan Hajnoczi 294dc3dd0d2SStefan Hajnoczi iothread = (IOThread *)object_dynamic_cast(object, TYPE_IOTHREAD); 295dc3dd0d2SStefan Hajnoczi if (!iothread) { 296dc3dd0d2SStefan Hajnoczi return 0; 297dc3dd0d2SStefan Hajnoczi } 298dc3dd0d2SStefan Hajnoczi 299dc3dd0d2SStefan Hajnoczi info = g_new0(IOThreadInfo, 1); 300dc3dd0d2SStefan Hajnoczi info->id = iothread_get_id(iothread); 301dc3dd0d2SStefan Hajnoczi info->thread_id = iothread->thread_id; 3025fc00480SPavel Hrdina info->poll_max_ns = iothread->poll_max_ns; 3035fc00480SPavel Hrdina info->poll_grow = iothread->poll_grow; 3045fc00480SPavel Hrdina info->poll_shrink = iothread->poll_shrink; 305dc3dd0d2SStefan Hajnoczi 306dc3dd0d2SStefan Hajnoczi elem = g_new0(IOThreadInfoList, 1); 307dc3dd0d2SStefan Hajnoczi elem->value = info; 308dc3dd0d2SStefan Hajnoczi elem->next = NULL; 309dc3dd0d2SStefan Hajnoczi 310dc3dd0d2SStefan Hajnoczi **prev = elem; 311dc3dd0d2SStefan Hajnoczi *prev = &elem->next; 312dc3dd0d2SStefan Hajnoczi return 0; 313dc3dd0d2SStefan Hajnoczi } 314dc3dd0d2SStefan Hajnoczi 315dc3dd0d2SStefan Hajnoczi IOThreadInfoList *qmp_query_iothreads(Error **errp) 316dc3dd0d2SStefan Hajnoczi { 317dc3dd0d2SStefan Hajnoczi IOThreadInfoList *head = NULL; 318dc3dd0d2SStefan Hajnoczi IOThreadInfoList **prev = &head; 319bc2256c4SDaniel P. Berrange Object *container = object_get_objects_root(); 320dc3dd0d2SStefan Hajnoczi 321dc3dd0d2SStefan Hajnoczi object_child_foreach(container, query_one_iothread, &prev); 322dc3dd0d2SStefan Hajnoczi return head; 323dc3dd0d2SStefan Hajnoczi } 324dce8921bSFam Zheng 325dce8921bSFam Zheng void iothread_stop_all(void) 326dce8921bSFam Zheng { 327dce8921bSFam Zheng Object *container = object_get_objects_root(); 328d16341faSPaolo Bonzini BlockDriverState *bs; 329d16341faSPaolo Bonzini BdrvNextIterator it; 330d16341faSPaolo Bonzini 331d16341faSPaolo Bonzini for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) { 332d16341faSPaolo Bonzini AioContext *ctx = bdrv_get_aio_context(bs); 333d16341faSPaolo Bonzini if (ctx == qemu_get_aio_context()) { 334d16341faSPaolo Bonzini continue; 335d16341faSPaolo Bonzini } 336d16341faSPaolo Bonzini aio_context_acquire(ctx); 337d16341faSPaolo Bonzini bdrv_set_aio_context(bs, qemu_get_aio_context()); 338d16341faSPaolo Bonzini aio_context_release(ctx); 339d16341faSPaolo Bonzini } 340dce8921bSFam Zheng 34182d90705SPeter Xu object_child_foreach(container, iothread_stop_iter, NULL); 342dce8921bSFam Zheng } 343329163cbSWang Yong 344329163cbSWang Yong static gpointer iothread_g_main_context_init(gpointer opaque) 345329163cbSWang Yong { 346329163cbSWang Yong AioContext *ctx; 347329163cbSWang Yong IOThread *iothread = opaque; 348329163cbSWang Yong GSource *source; 349329163cbSWang Yong 350329163cbSWang Yong iothread->worker_context = g_main_context_new(); 351329163cbSWang Yong 352329163cbSWang Yong ctx = iothread_get_aio_context(iothread); 353329163cbSWang Yong source = aio_get_g_source(ctx); 354329163cbSWang Yong g_source_attach(source, iothread->worker_context); 355329163cbSWang Yong g_source_unref(source); 356329163cbSWang Yong 357329163cbSWang Yong aio_notify(iothread->ctx); 358329163cbSWang Yong return NULL; 359329163cbSWang Yong } 360329163cbSWang Yong 361329163cbSWang Yong GMainContext *iothread_get_g_main_context(IOThread *iothread) 362329163cbSWang Yong { 363329163cbSWang Yong g_once(&iothread->once, iothread_g_main_context_init, iothread); 364329163cbSWang Yong 365329163cbSWang Yong return iothread->worker_context; 366329163cbSWang Yong } 3670173e21bSPeter Xu 3680173e21bSPeter Xu IOThread *iothread_create(const char *id, Error **errp) 3690173e21bSPeter Xu { 3700173e21bSPeter Xu Object *obj; 3710173e21bSPeter Xu 3720173e21bSPeter Xu obj = object_new_with_props(TYPE_IOTHREAD, 3730173e21bSPeter Xu object_get_internal_root(), 3740173e21bSPeter Xu id, errp, NULL); 3750173e21bSPeter Xu 3760173e21bSPeter Xu return IOTHREAD(obj); 3770173e21bSPeter Xu } 3780173e21bSPeter Xu 3790173e21bSPeter Xu void iothread_destroy(IOThread *iothread) 3800173e21bSPeter Xu { 3810173e21bSPeter Xu object_unparent(OBJECT(iothread)); 3820173e21bSPeter Xu } 383