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