qdev-monitor.c

   1 /*
   2  *  Dynamic device configuration and creation.
   3  *
   4  *  Copyright (c) 2009 CodeSourcery
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "hw/qdev.h"
  21 #include "hw/sysbus.h"
  22 #include "monitor/monitor.h"
  23 #include "monitor/qdev.h"
  24 #include "qmp-commands.h"
  25 #include "sysemu/arch_init.h"
  26 #include "qapi/qmp/qerror.h"
  27 #include "qemu/config-file.h"
  28 #include "qemu/error-report.h"
  29
  30 /*
  31  * Aliases were a bad idea from the start.  Let's keep them
  32  * from spreading further.
  33  */
  34 typedef struct QDevAlias
  35 {
  36     const char *typename;
  37     const char *alias;
  38     uint32_t arch_mask;
  39 } QDevAlias;
  40
  41 static const QDevAlias qdev_alias_table[] = {
  42     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  43     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  44     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  45     { "virtio-balloon-pci", "virtio-balloon",
  46             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  47     { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
  48     { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
  49     { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
  50     { "lsi53c895a", "lsi" },
  51     { "ich9-ahci", "ahci" },
  52     { "kvm-pci-assign", "pci-assign" },
  53     { "e1000", "e1000-82540em" },
  54     { }
  55 };
  56
  57 static const char *qdev_class_get_alias(DeviceClass *dc)
  58 {
  59     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  60     int i;
  61
  62     for (i = 0; qdev_alias_table[i].typename; i++) {
  63         if (qdev_alias_table[i].arch_mask &&
  64             !(qdev_alias_table[i].arch_mask & arch_type)) {
  65             continue;
  66         }
  67
  68         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
  69             return qdev_alias_table[i].alias;
  70         }
  71     }
  72
  73     return NULL;
  74 }
  75
  76 static bool qdev_class_has_alias(DeviceClass *dc)
  77 {
  78     return (qdev_class_get_alias(dc) != NULL);
  79 }
  80
  81 static void qdev_print_devinfo(DeviceClass *dc)
  82 {
  83     error_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
  84     if (dc->bus_type) {
  85         error_printf(", bus %s", dc->bus_type);
  86     }
  87     if (qdev_class_has_alias(dc)) {
  88         error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
  89     }
  90     if (dc->desc) {
  91         error_printf(", desc \"%s\"", dc->desc);
  92     }
  93     if (dc->cannot_instantiate_with_device_add_yet) {
  94         error_printf(", no-user");
  95     }
  96     error_printf("\n");
  97 }
  98
  99 static gint devinfo_cmp(gconstpointer a, gconstpointer b)
 100 {
 101     return strcasecmp(object_class_get_name((ObjectClass *)a),
 102                       object_class_get_name((ObjectClass *)b));
 103 }
 104
 105 static void qdev_print_devinfos(bool show_no_user)
 106 {
 107     static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
 108         [DEVICE_CATEGORY_BRIDGE]  = "Controller/Bridge/Hub",
 109         [DEVICE_CATEGORY_USB]     = "USB",
 110         [DEVICE_CATEGORY_STORAGE] = "Storage",
 111         [DEVICE_CATEGORY_NETWORK] = "Network",
 112         [DEVICE_CATEGORY_INPUT]   = "Input",
 113         [DEVICE_CATEGORY_DISPLAY] = "Display",
 114         [DEVICE_CATEGORY_SOUND]   = "Sound",
 115         [DEVICE_CATEGORY_MISC]    = "Misc",
 116         [DEVICE_CATEGORY_MAX]     = "Uncategorized",
 117     };
 118     GSList *list, *elt;
 119     int i;
 120     bool cat_printed;
 121
 122     list = g_slist_sort(object_class_get_list(TYPE_DEVICE, false),
 123                         devinfo_cmp);
 124
 125     for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
 126         cat_printed = false;
 127         for (elt = list; elt; elt = elt->next) {
 128             DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
 129                                                  TYPE_DEVICE);
 130             if ((i < DEVICE_CATEGORY_MAX
 131                  ? !test_bit(i, dc->categories)
 132                  : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
 133                 || (!show_no_user
 134                     && dc->cannot_instantiate_with_device_add_yet)) {
 135                 continue;
 136             }
 137             if (!cat_printed) {
 138                 error_printf("%s%s devices:\n", i ? "\n" : "",
 139                              cat_name[i]);
 140                 cat_printed = true;
 141             }
 142             qdev_print_devinfo(dc);
 143         }
 144     }
 145
 146     g_slist_free(list);
 147 }
 148
 149 static int set_property(void *opaque, const char *name, const char *value,
 150                         Error **errp)
 151 {
 152     Object *obj = opaque;
 153     Error *err = NULL;
 154
 155     if (strcmp(name, "driver") == 0)
 156         return 0;
 157     if (strcmp(name, "bus") == 0)
 158         return 0;
 159
 160     object_property_parse(obj, value, name, &err);
 161     if (err != NULL) {
 162         error_propagate(errp, err);
 163         return -1;
 164     }
 165     return 0;
 166 }
 167
 168 static const char *find_typename_by_alias(const char *alias)
 169 {
 170     int i;
 171
 172     for (i = 0; qdev_alias_table[i].alias; i++) {
 173         if (qdev_alias_table[i].arch_mask &&
 174             !(qdev_alias_table[i].arch_mask & arch_type)) {
 175             continue;
 176         }
 177
 178         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 179             return qdev_alias_table[i].typename;
 180         }
 181     }
 182
 183     return NULL;
 184 }
 185
 186 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
 187 {
 188     ObjectClass *oc;
 189     DeviceClass *dc;
 190
 191     oc = object_class_by_name(*driver);
 192     if (!oc) {
 193         const char *typename = find_typename_by_alias(*driver);
 194
 195         if (typename) {
 196             *driver = typename;
 197             oc = object_class_by_name(*driver);
 198         }
 199     }
 200
 201     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 202         error_setg(errp, "'%s' is not a valid device model name", *driver);
 203         return NULL;
 204     }
 205
 206     if (object_class_is_abstract(oc)) {
 207         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 208                    "non-abstract device type");
 209         return NULL;
 210     }
 211
 212     dc = DEVICE_CLASS(oc);
 213     if (dc->cannot_instantiate_with_device_add_yet ||
 214         (qdev_hotplug && !dc->hotpluggable)) {
 215         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 216                    "pluggable device type");
 217         return NULL;
 218     }
 219
 220     return dc;
 221 }
 222
 223
 224 int qdev_device_help(QemuOpts *opts)
 225 {
 226     Error *local_err = NULL;
 227     const char *driver;
 228     DevicePropertyInfoList *prop_list;
 229     DevicePropertyInfoList *prop;
 230
 231     driver = qemu_opt_get(opts, "driver");
 232     if (driver && is_help_option(driver)) {
 233         qdev_print_devinfos(false);
 234         return 1;
 235     }
 236
 237     if (!driver || !qemu_opt_has_help_opt(opts)) {
 238         return 0;
 239     }
 240
 241     if (!object_class_by_name(driver)) {
 242         const char *typename = find_typename_by_alias(driver);
 243
 244         if (typename) {
 245             driver = typename;
 246         }
 247     }
 248
 249     prop_list = qmp_device_list_properties(driver, &local_err);
 250     if (local_err) {
 251         goto error;
 252     }
 253
 254     for (prop = prop_list; prop; prop = prop->next) {
 255         error_printf("%s.%s=%s", driver,
 256                      prop->value->name,
 257                      prop->value->type);
 258         if (prop->value->has_description) {
 259             error_printf(" (%s)\n", prop->value->description);
 260         } else {
 261             error_printf("\n");
 262         }
 263     }
 264
 265     qapi_free_DevicePropertyInfoList(prop_list);
 266     return 1;
 267
 268 error:
 269     error_report_err(local_err);
 270     return 1;
 271 }
 272
 273 static Object *qdev_get_peripheral(void)
 274 {
 275     static Object *dev;
 276
 277     if (dev == NULL) {
 278         dev = container_get(qdev_get_machine(), "/peripheral");
 279     }
 280
 281     return dev;
 282 }
 283
 284 static Object *qdev_get_peripheral_anon(void)
 285 {
 286     static Object *dev;
 287
 288     if (dev == NULL) {
 289         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 290     }
 291
 292     return dev;
 293 }
 294
 295 static void qbus_list_bus(DeviceState *dev, Error **errp)
 296 {
 297     BusState *child;
 298     const char *sep = " ";
 299
 300     error_append_hint(errp, "child buses at \"%s\":",
 301                       dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 302     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 303         error_append_hint(errp, "%s\"%s\"", sep, child->name);
 304         sep = ", ";
 305     }
 306     error_append_hint(errp, "\n");
 307 }
 308
 309 static void qbus_list_dev(BusState *bus, Error **errp)
 310 {
 311     BusChild *kid;
 312     const char *sep = " ";
 313
 314     error_append_hint(errp, "devices at \"%s\":", bus->name);
 315     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 316         DeviceState *dev = kid->child;
 317         error_append_hint(errp, "%s\"%s\"", sep,
 318                           object_get_typename(OBJECT(dev)));
 319         if (dev->id) {
 320             error_append_hint(errp, "/\"%s\"", dev->id);
 321         }
 322         sep = ", ";
 323     }
 324     error_append_hint(errp, "\n");
 325 }
 326
 327 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 328 {
 329     BusState *child;
 330
 331     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 332         if (strcmp(child->name, elem) == 0) {
 333             return child;
 334         }
 335     }
 336     return NULL;
 337 }
 338
 339 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 340 {
 341     BusChild *kid;
 342
 343     /*
 344      * try to match in order:
 345      *   (1) instance id, if present
 346      *   (2) driver name
 347      *   (3) driver alias, if present
 348      */
 349     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 350         DeviceState *dev = kid->child;
 351         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 352             return dev;
 353         }
 354     }
 355     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 356         DeviceState *dev = kid->child;
 357         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 358             return dev;
 359         }
 360     }
 361     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 362         DeviceState *dev = kid->child;
 363         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 364
 365         if (qdev_class_has_alias(dc) &&
 366             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 367             return dev;
 368         }
 369     }
 370     return NULL;
 371 }
 372
 373 static inline bool qbus_is_full(BusState *bus)
 374 {
 375     BusClass *bus_class = BUS_GET_CLASS(bus);
 376     return bus_class->max_dev && bus->max_index >= bus_class->max_dev;
 377 }
 378
 379 /*
 380  * Search the tree rooted at @bus for a bus.
 381  * If @name, search for a bus with that name.  Note that bus names
 382  * need not be unique.  Yes, that's screwed up.
 383  * Else search for a bus that is a subtype of @bus_typename.
 384  * If more than one exists, prefer one that can take another device.
 385  * Return the bus if found, else %NULL.
 386  */
 387 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 388                                      const char *bus_typename)
 389 {
 390     BusChild *kid;
 391     BusState *pick, *child, *ret;
 392     bool match;
 393
 394     assert(name || bus_typename);
 395     if (name) {
 396         match = !strcmp(bus->name, name);
 397     } else {
 398         match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
 399     }
 400
 401     if (match && !qbus_is_full(bus)) {
 402         return bus;             /* root matches and isn't full */
 403     }
 404
 405     pick = match ? bus : NULL;
 406
 407     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 408         DeviceState *dev = kid->child;
 409         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 410             ret = qbus_find_recursive(child, name, bus_typename);
 411             if (ret && !qbus_is_full(ret)) {
 412                 return ret;     /* a descendant matches and isn't full */
 413             }
 414             if (ret && !pick) {
 415                 pick = ret;
 416             }
 417         }
 418     }
 419
 420     /* root or a descendant matches, but is full */
 421     return pick;
 422 }
 423
 424 static BusState *qbus_find(const char *path, Error **errp)
 425 {
 426     DeviceState *dev;
 427     BusState *bus;
 428     char elem[128];
 429     int pos, len;
 430
 431     /* find start element */
 432     if (path[0] == '/') {
 433         bus = sysbus_get_default();
 434         pos = 0;
 435     } else {
 436         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 437             assert(!path[0]);
 438             elem[0] = len = 0;
 439         }
 440         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 441         if (!bus) {
 442             error_setg(errp, "Bus '%s' not found", elem);
 443             return NULL;
 444         }
 445         pos = len;
 446     }
 447
 448     for (;;) {
 449         assert(path[pos] == '/' || !path[pos]);
 450         while (path[pos] == '/') {
 451             pos++;
 452         }
 453         if (path[pos] == '\0') {
 454             break;
 455         }
 456
 457         /* find device */
 458         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 459             g_assert_not_reached();
 460             elem[0] = len = 0;
 461         }
 462         pos += len;
 463         dev = qbus_find_dev(bus, elem);
 464         if (!dev) {
 465             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 466                       "Device '%s' not found", elem);
 467             qbus_list_dev(bus, errp);
 468             return NULL;
 469         }
 470
 471         assert(path[pos] == '/' || !path[pos]);
 472         while (path[pos] == '/') {
 473             pos++;
 474         }
 475         if (path[pos] == '\0') {
 476             /* last specified element is a device.  If it has exactly
 477              * one child bus accept it nevertheless */
 478             if (dev->num_child_bus == 1) {
 479                 bus = QLIST_FIRST(&dev->child_bus);
 480                 break;
 481             }
 482             if (dev->num_child_bus) {
 483                 error_setg(errp, "Device '%s' has multiple child buses",
 484                            elem);
 485                 qbus_list_bus(dev, errp);
 486             } else {
 487                 error_setg(errp, "Device '%s' has no child bus", elem);
 488             }
 489             return NULL;
 490         }
 491
 492         /* find bus */
 493         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 494             g_assert_not_reached();
 495             elem[0] = len = 0;
 496         }
 497         pos += len;
 498         bus = qbus_find_bus(dev, elem);
 499         if (!bus) {
 500             error_setg(errp, "Bus '%s' not found", elem);
 501             qbus_list_bus(dev, errp);
 502             return NULL;
 503         }
 504     }
 505
 506     if (qbus_is_full(bus)) {
 507         error_setg(errp, "Bus '%s' is full", path);
 508         return NULL;
 509     }
 510     return bus;
 511 }
 512
 513 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 514 {
 515     DeviceClass *dc;
 516     const char *driver, *path, *id;
 517     DeviceState *dev;
 518     BusState *bus = NULL;
 519     Error *err = NULL;
 520
 521     driver = qemu_opt_get(opts, "driver");
 522     if (!driver) {
 523         error_setg(errp, QERR_MISSING_PARAMETER, "driver");
 524         return NULL;
 525     }
 526
 527     /* find driver */
 528     dc = qdev_get_device_class(&driver, errp);
 529     if (!dc) {
 530         return NULL;
 531     }
 532
 533     /* find bus */
 534     path = qemu_opt_get(opts, "bus");
 535     if (path != NULL) {
 536         bus = qbus_find(path, errp);
 537         if (!bus) {
 538             return NULL;
 539         }
 540         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 541             error_setg(errp, "Device '%s' can't go on %s bus",
 542                        driver, object_get_typename(OBJECT(bus)));
 543             return NULL;
 544         }
 545     } else if (dc->bus_type != NULL) {
 546         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 547         if (!bus || qbus_is_full(bus)) {
 548             error_setg(errp, "No '%s' bus found for device '%s'",
 549                        dc->bus_type, driver);
 550             return NULL;
 551         }
 552     }
 553     if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
 554         error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
 555         return NULL;
 556     }
 557
 558     /* create device */
 559     dev = DEVICE(object_new(driver));
 560
 561     if (bus) {
 562         qdev_set_parent_bus(dev, bus);
 563     }
 564
 565     id = qemu_opts_id(opts);
 566     if (id) {
 567         dev->id = id;
 568     }
 569
 570     if (dev->id) {
 571         object_property_add_child(qdev_get_peripheral(), dev->id,
 572                                   OBJECT(dev), NULL);
 573     } else {
 574         static int anon_count;
 575         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 576         object_property_add_child(qdev_get_peripheral_anon(), name,
 577                                   OBJECT(dev), NULL);
 578         g_free(name);
 579     }
 580
 581     /* set properties */
 582     if (qemu_opt_foreach(opts, set_property, dev, &err)) {
 583         error_propagate(errp, err);
 584         object_unparent(OBJECT(dev));
 585         object_unref(OBJECT(dev));
 586         return NULL;
 587     }
 588
 589     dev->opts = opts;
 590     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 591     if (err != NULL) {
 592         error_propagate(errp, err);
 593         dev->opts = NULL;
 594         object_unparent(OBJECT(dev));
 595         object_unref(OBJECT(dev));
 596         return NULL;
 597     }
 598     return dev;
 599 }
 600
 601
 602 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 603 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 604
 605 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 606                              int indent)
 607 {
 608     if (!props)
 609         return;
 610     for (; props->name; props++) {
 611         Error *err = NULL;
 612         char *value;
 613         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 614         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 615             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 616         } else {
 617             value = object_property_print(OBJECT(dev), props->name, true, &err);
 618         }
 619         g_free(legacy_name);
 620
 621         if (err) {
 622             error_free(err);
 623             continue;
 624         }
 625         qdev_printf("%s = %s\n", props->name,
 626                     value && *value ? value : "<null>");
 627         g_free(value);
 628     }
 629 }
 630
 631 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 632 {
 633     BusClass *bc = BUS_GET_CLASS(bus);
 634
 635     if (bc->print_dev) {
 636         bc->print_dev(mon, dev, indent);
 637     }
 638 }
 639
 640 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 641 {
 642     ObjectClass *class;
 643     BusState *child;
 644     NamedGPIOList *ngl;
 645
 646     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 647                 dev->id ? dev->id : "");
 648     indent += 2;
 649     QLIST_FOREACH(ngl, &dev->gpios, node) {
 650         if (ngl->num_in) {
 651             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 652                         ngl->num_in);
 653         }
 654         if (ngl->num_out) {
 655             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 656                         ngl->num_out);
 657         }
 658     }
 659     class = object_get_class(OBJECT(dev));
 660     do {
 661         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 662         class = object_class_get_parent(class);
 663     } while (class != object_class_by_name(TYPE_DEVICE));
 664     bus_print_dev(dev->parent_bus, mon, dev, indent);
 665     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 666         qbus_print(mon, child, indent);
 667     }
 668 }
 669
 670 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 671 {
 672     BusChild *kid;
 673
 674     qdev_printf("bus: %s\n", bus->name);
 675     indent += 2;
 676     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 677     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 678         DeviceState *dev = kid->child;
 679         qdev_print(mon, dev, indent);
 680     }
 681 }
 682 #undef qdev_printf
 683
 684 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
 685 {
 686     if (sysbus_get_default())
 687         qbus_print(mon, sysbus_get_default(), 0);
 688 }
 689
 690 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
 691 {
 692     qdev_print_devinfos(true);
 693 }
 694
 695 typedef struct QOMCompositionState {
 696     Monitor *mon;
 697     int indent;
 698 } QOMCompositionState;
 699
 700 static void print_qom_composition(Monitor *mon, Object *obj, int indent);
 701
 702 static int print_qom_composition_child(Object *obj, void *opaque)
 703 {
 704     QOMCompositionState *s = opaque;
 705
 706     print_qom_composition(s->mon, obj, s->indent);
 707
 708     return 0;
 709 }
 710
 711 static void print_qom_composition(Monitor *mon, Object *obj, int indent)
 712 {
 713     QOMCompositionState s = {
 714         .mon = mon,
 715         .indent = indent + 2,
 716     };
 717     char *name;
 718
 719     if (obj == object_get_root()) {
 720         name = g_strdup("");
 721     } else {
 722         name = object_get_canonical_path_component(obj);
 723     }
 724     monitor_printf(mon, "%*s/%s (%s)\n", indent, "", name,
 725                    object_get_typename(obj));
 726     g_free(name);
 727     object_child_foreach(obj, print_qom_composition_child, &s);
 728 }
 729
 730 void hmp_info_qom_tree(Monitor *mon, const QDict *dict)
 731 {
 732     const char *path = qdict_get_try_str(dict, "path");
 733     Object *obj;
 734     bool ambiguous = false;
 735
 736     if (path) {
 737         obj = object_resolve_path(path, &ambiguous);
 738         if (!obj) {
 739             monitor_printf(mon, "Path '%s' could not be resolved.\n", path);
 740             return;
 741         }
 742         if (ambiguous) {
 743             monitor_printf(mon, "Warning: Path '%s' is ambiguous.\n", path);
 744             return;
 745         }
 746     } else {
 747         obj = qdev_get_machine();
 748     }
 749     print_qom_composition(mon, obj, 0);
 750 }
 751
 752 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
 753 {
 754     Error *local_err = NULL;
 755     QemuOpts *opts;
 756     DeviceState *dev;
 757
 758     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 759     if (local_err) {
 760         error_propagate(errp, local_err);
 761         return;
 762     }
 763     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 764         qemu_opts_del(opts);
 765         return;
 766     }
 767     dev = qdev_device_add(opts, &local_err);
 768     if (!dev) {
 769         error_propagate(errp, local_err);
 770         qemu_opts_del(opts);
 771         return;
 772     }
 773     object_unref(OBJECT(dev));
 774 }
 775
 776 void qmp_device_del(const char *id, Error **errp)
 777 {
 778     Object *obj;
 779
 780     if (id[0] == '/') {
 781         obj = object_resolve_path(id, NULL);
 782     } else {
 783         char *root_path = object_get_canonical_path(qdev_get_peripheral());
 784         char *path = g_strdup_printf("%s/%s", root_path, id);
 785
 786         g_free(root_path);
 787         obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 788         g_free(path);
 789     }
 790
 791     if (!obj) {
 792         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 793                   "Device '%s' not found", id);
 794         return;
 795     }
 796
 797     if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
 798         error_setg(errp, "%s is not a hotpluggable device", id);
 799         return;
 800     }
 801
 802     qdev_unplug(DEVICE(obj), errp);
 803 }
 804
 805 void qdev_machine_init(void)
 806 {
 807     qdev_get_peripheral_anon();
 808     qdev_get_peripheral();
 809 }
 810
 811 QemuOptsList qemu_device_opts = {
 812     .name = "device",
 813     .implied_opt_name = "driver",
 814     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 815     .desc = {
 816         /*
 817          * no elements => accept any
 818          * sanity checking will happen later
 819          * when setting device properties
 820          */
 821         { /* end of list */ }
 822     },
 823 };
 824
 825 QemuOptsList qemu_global_opts = {
 826     .name = "global",
 827     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 828     .desc = {
 829         {
 830             .name = "driver",
 831             .type = QEMU_OPT_STRING,
 832         },{
 833             .name = "property",
 834             .type = QEMU_OPT_STRING,
 835         },{
 836             .name = "value",
 837             .type = QEMU_OPT_STRING,
 838         },
 839         { /* end of list */ }
 840     },
 841 };
 842
 843 int qemu_global_option(const char *str)
 844 {
 845     char driver[64], property[64];
 846     QemuOpts *opts;
 847     int rc, offset;
 848
 849     rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
 850     if (rc == 2 && str[offset] == '=') {
 851         opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 852         qemu_opt_set(opts, "driver", driver, &error_abort);
 853         qemu_opt_set(opts, "property", property, &error_abort);
 854         qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
 855         return 0;
 856     }
 857
 858     opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
 859     if (!opts) {
 860         return -1;
 861     }
 862
 863     return 0;
 864 }