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