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 "qemu/osdep.h"
  21 #include "hw/qdev.h"
  22 #include "hw/sysbus.h"
  23 #include "monitor/monitor.h"
  24 #include "monitor/qdev.h"
  25 #include "qmp-commands.h"
  26 #include "sysemu/arch_init.h"
  27 #include "qapi/qmp/qerror.h"
  28 #include "qemu/config-file.h"
  29 #include "qemu/error-report.h"
  30
  31 /*
  32  * Aliases were a bad idea from the start.  Let's keep them
  33  * from spreading further.
  34  */
  35 typedef struct QDevAlias
  36 {
  37     const char *typename;
  38     const char *alias;
  39     uint32_t arch_mask;
  40 } QDevAlias;
  41
  42 static const QDevAlias qdev_alias_table[] = {
  43     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  44     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  45     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  46     { "virtio-balloon-pci", "virtio-balloon",
  47             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  48     { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
  49     { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
  50     { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
  51     { "lsi53c895a", "lsi" },
  52     { "ich9-ahci", "ahci" },
  53     { "kvm-pci-assign", "pci-assign" },
  54     { "e1000", "e1000-82540em" },
  55     { }
  56 };
  57
  58 static const char *qdev_class_get_alias(DeviceClass *dc)
  59 {
  60     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  61     int i;
  62
  63     for (i = 0; qdev_alias_table[i].typename; i++) {
  64         if (qdev_alias_table[i].arch_mask &&
  65             !(qdev_alias_table[i].arch_mask & arch_type)) {
  66             continue;
  67         }
  68
  69         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
  70             return qdev_alias_table[i].alias;
  71         }
  72     }
  73
  74     return NULL;
  75 }
  76
  77 static bool qdev_class_has_alias(DeviceClass *dc)
  78 {
  79     return (qdev_class_get_alias(dc) != NULL);
  80 }
  81
  82 static void qdev_print_devinfo(DeviceClass *dc)
  83 {
  84     error_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
  85     if (dc->bus_type) {
  86         error_printf(", bus %s", dc->bus_type);
  87     }
  88     if (qdev_class_has_alias(dc)) {
  89         error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
  90     }
  91     if (dc->desc) {
  92         error_printf(", desc \"%s\"", dc->desc);
  93     }
  94     if (dc->cannot_instantiate_with_device_add_yet) {
  95         error_printf(", no-user");
  96     }
  97     error_printf("\n");
  98 }
  99
 100 static gint devinfo_cmp(gconstpointer a, gconstpointer b)
 101 {
 102     return strcasecmp(object_class_get_name((ObjectClass *)a),
 103                       object_class_get_name((ObjectClass *)b));
 104 }
 105
 106 static void qdev_print_devinfos(bool show_no_user)
 107 {
 108     static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
 109         [DEVICE_CATEGORY_BRIDGE]  = "Controller/Bridge/Hub",
 110         [DEVICE_CATEGORY_USB]     = "USB",
 111         [DEVICE_CATEGORY_STORAGE] = "Storage",
 112         [DEVICE_CATEGORY_NETWORK] = "Network",
 113         [DEVICE_CATEGORY_INPUT]   = "Input",
 114         [DEVICE_CATEGORY_DISPLAY] = "Display",
 115         [DEVICE_CATEGORY_SOUND]   = "Sound",
 116         [DEVICE_CATEGORY_MISC]    = "Misc",
 117         [DEVICE_CATEGORY_MAX]     = "Uncategorized",
 118     };
 119     GSList *list, *elt;
 120     int i;
 121     bool cat_printed;
 122
 123     list = g_slist_sort(object_class_get_list(TYPE_DEVICE, false),
 124                         devinfo_cmp);
 125
 126     for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
 127         cat_printed = false;
 128         for (elt = list; elt; elt = elt->next) {
 129             DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
 130                                                  TYPE_DEVICE);
 131             if ((i < DEVICE_CATEGORY_MAX
 132                  ? !test_bit(i, dc->categories)
 133                  : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
 134                 || (!show_no_user
 135                     && dc->cannot_instantiate_with_device_add_yet)) {
 136                 continue;
 137             }
 138             if (!cat_printed) {
 139                 error_printf("%s%s devices:\n", i ? "\n" : "",
 140                              cat_name[i]);
 141                 cat_printed = true;
 142             }
 143             qdev_print_devinfo(dc);
 144         }
 145     }
 146
 147     g_slist_free(list);
 148 }
 149
 150 static int set_property(void *opaque, const char *name, const char *value,
 151                         Error **errp)
 152 {
 153     Object *obj = opaque;
 154     Error *err = NULL;
 155
 156     if (strcmp(name, "driver") == 0)
 157         return 0;
 158     if (strcmp(name, "bus") == 0)
 159         return 0;
 160
 161     object_property_parse(obj, value, name, &err);
 162     if (err != NULL) {
 163         error_propagate(errp, err);
 164         return -1;
 165     }
 166     return 0;
 167 }
 168
 169 static const char *find_typename_by_alias(const char *alias)
 170 {
 171     int i;
 172
 173     for (i = 0; qdev_alias_table[i].alias; i++) {
 174         if (qdev_alias_table[i].arch_mask &&
 175             !(qdev_alias_table[i].arch_mask & arch_type)) {
 176             continue;
 177         }
 178
 179         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 180             return qdev_alias_table[i].typename;
 181         }
 182     }
 183
 184     return NULL;
 185 }
 186
 187 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
 188 {
 189     ObjectClass *oc;
 190     DeviceClass *dc;
 191     const char *original_name = *driver;
 192
 193     oc = object_class_by_name(*driver);
 194     if (!oc) {
 195         const char *typename = find_typename_by_alias(*driver);
 196
 197         if (typename) {
 198             *driver = typename;
 199             oc = object_class_by_name(*driver);
 200         }
 201     }
 202
 203     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 204         if (*driver != original_name) {
 205             error_setg(errp, "'%s' (alias '%s') is not a valid device model"
 206                        " name", original_name, *driver);
 207         } else {
 208             error_setg(errp, "'%s' is not a valid device model name", *driver);
 209         }
 210         return NULL;
 211     }
 212
 213     if (object_class_is_abstract(oc)) {
 214         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 215                    "non-abstract device type");
 216         return NULL;
 217     }
 218
 219     dc = DEVICE_CLASS(oc);
 220     if (dc->cannot_instantiate_with_device_add_yet ||
 221         (qdev_hotplug && !dc->hotpluggable)) {
 222         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 223                    "pluggable device type");
 224         return NULL;
 225     }
 226
 227     return dc;
 228 }
 229
 230
 231 int qdev_device_help(QemuOpts *opts)
 232 {
 233     Error *local_err = NULL;
 234     const char *driver;
 235     DevicePropertyInfoList *prop_list;
 236     DevicePropertyInfoList *prop;
 237
 238     driver = qemu_opt_get(opts, "driver");
 239     if (driver && is_help_option(driver)) {
 240         qdev_print_devinfos(false);
 241         return 1;
 242     }
 243
 244     if (!driver || !qemu_opt_has_help_opt(opts)) {
 245         return 0;
 246     }
 247
 248     if (!object_class_by_name(driver)) {
 249         const char *typename = find_typename_by_alias(driver);
 250
 251         if (typename) {
 252             driver = typename;
 253         }
 254     }
 255
 256     prop_list = qmp_device_list_properties(driver, &local_err);
 257     if (local_err) {
 258         goto error;
 259     }
 260
 261     for (prop = prop_list; prop; prop = prop->next) {
 262         error_printf("%s.%s=%s", driver,
 263                      prop->value->name,
 264                      prop->value->type);
 265         if (prop->value->has_description) {
 266             error_printf(" (%s)\n", prop->value->description);
 267         } else {
 268             error_printf("\n");
 269         }
 270     }
 271
 272     qapi_free_DevicePropertyInfoList(prop_list);
 273     return 1;
 274
 275 error:
 276     error_report_err(local_err);
 277     return 1;
 278 }
 279
 280 static Object *qdev_get_peripheral(void)
 281 {
 282     static Object *dev;
 283
 284     if (dev == NULL) {
 285         dev = container_get(qdev_get_machine(), "/peripheral");
 286     }
 287
 288     return dev;
 289 }
 290
 291 static Object *qdev_get_peripheral_anon(void)
 292 {
 293     static Object *dev;
 294
 295     if (dev == NULL) {
 296         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 297     }
 298
 299     return dev;
 300 }
 301
 302 static void qbus_list_bus(DeviceState *dev, Error **errp)
 303 {
 304     BusState *child;
 305     const char *sep = " ";
 306
 307     error_append_hint(errp, "child buses at \"%s\":",
 308                       dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 309     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 310         error_append_hint(errp, "%s\"%s\"", sep, child->name);
 311         sep = ", ";
 312     }
 313     error_append_hint(errp, "\n");
 314 }
 315
 316 static void qbus_list_dev(BusState *bus, Error **errp)
 317 {
 318     BusChild *kid;
 319     const char *sep = " ";
 320
 321     error_append_hint(errp, "devices at \"%s\":", bus->name);
 322     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 323         DeviceState *dev = kid->child;
 324         error_append_hint(errp, "%s\"%s\"", sep,
 325                           object_get_typename(OBJECT(dev)));
 326         if (dev->id) {
 327             error_append_hint(errp, "/\"%s\"", dev->id);
 328         }
 329         sep = ", ";
 330     }
 331     error_append_hint(errp, "\n");
 332 }
 333
 334 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 335 {
 336     BusState *child;
 337
 338     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 339         if (strcmp(child->name, elem) == 0) {
 340             return child;
 341         }
 342     }
 343     return NULL;
 344 }
 345
 346 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 347 {
 348     BusChild *kid;
 349
 350     /*
 351      * try to match in order:
 352      *   (1) instance id, if present
 353      *   (2) driver name
 354      *   (3) driver alias, if present
 355      */
 356     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 357         DeviceState *dev = kid->child;
 358         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 359             return dev;
 360         }
 361     }
 362     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 363         DeviceState *dev = kid->child;
 364         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 365             return dev;
 366         }
 367     }
 368     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 369         DeviceState *dev = kid->child;
 370         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 371
 372         if (qdev_class_has_alias(dc) &&
 373             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 374             return dev;
 375         }
 376     }
 377     return NULL;
 378 }
 379
 380 static inline bool qbus_is_full(BusState *bus)
 381 {
 382     BusClass *bus_class = BUS_GET_CLASS(bus);
 383     return bus_class->max_dev && bus->max_index >= bus_class->max_dev;
 384 }
 385
 386 /*
 387  * Search the tree rooted at @bus for a bus.
 388  * If @name, search for a bus with that name.  Note that bus names
 389  * need not be unique.  Yes, that's screwed up.
 390  * Else search for a bus that is a subtype of @bus_typename.
 391  * If more than one exists, prefer one that can take another device.
 392  * Return the bus if found, else %NULL.
 393  */
 394 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 395                                      const char *bus_typename)
 396 {
 397     BusChild *kid;
 398     BusState *pick, *child, *ret;
 399     bool match;
 400
 401     assert(name || bus_typename);
 402     if (name) {
 403         match = !strcmp(bus->name, name);
 404     } else {
 405         match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
 406     }
 407
 408     if (match && !qbus_is_full(bus)) {
 409         return bus;             /* root matches and isn't full */
 410     }
 411
 412     pick = match ? bus : NULL;
 413
 414     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 415         DeviceState *dev = kid->child;
 416         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 417             ret = qbus_find_recursive(child, name, bus_typename);
 418             if (ret && !qbus_is_full(ret)) {
 419                 return ret;     /* a descendant matches and isn't full */
 420             }
 421             if (ret && !pick) {
 422                 pick = ret;
 423             }
 424         }
 425     }
 426
 427     /* root or a descendant matches, but is full */
 428     return pick;
 429 }
 430
 431 static BusState *qbus_find(const char *path, Error **errp)
 432 {
 433     DeviceState *dev;
 434     BusState *bus;
 435     char elem[128];
 436     int pos, len;
 437
 438     /* find start element */
 439     if (path[0] == '/') {
 440         bus = sysbus_get_default();
 441         pos = 0;
 442     } else {
 443         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 444             assert(!path[0]);
 445             elem[0] = len = 0;
 446         }
 447         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 448         if (!bus) {
 449             error_setg(errp, "Bus '%s' not found", elem);
 450             return NULL;
 451         }
 452         pos = len;
 453     }
 454
 455     for (;;) {
 456         assert(path[pos] == '/' || !path[pos]);
 457         while (path[pos] == '/') {
 458             pos++;
 459         }
 460         if (path[pos] == '\0') {
 461             break;
 462         }
 463
 464         /* find device */
 465         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 466             g_assert_not_reached();
 467             elem[0] = len = 0;
 468         }
 469         pos += len;
 470         dev = qbus_find_dev(bus, elem);
 471         if (!dev) {
 472             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 473                       "Device '%s' not found", elem);
 474             qbus_list_dev(bus, errp);
 475             return NULL;
 476         }
 477
 478         assert(path[pos] == '/' || !path[pos]);
 479         while (path[pos] == '/') {
 480             pos++;
 481         }
 482         if (path[pos] == '\0') {
 483             /* last specified element is a device.  If it has exactly
 484              * one child bus accept it nevertheless */
 485             if (dev->num_child_bus == 1) {
 486                 bus = QLIST_FIRST(&dev->child_bus);
 487                 break;
 488             }
 489             if (dev->num_child_bus) {
 490                 error_setg(errp, "Device '%s' has multiple child buses",
 491                            elem);
 492                 qbus_list_bus(dev, errp);
 493             } else {
 494                 error_setg(errp, "Device '%s' has no child bus", elem);
 495             }
 496             return NULL;
 497         }
 498
 499         /* find bus */
 500         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 501             g_assert_not_reached();
 502             elem[0] = len = 0;
 503         }
 504         pos += len;
 505         bus = qbus_find_bus(dev, elem);
 506         if (!bus) {
 507             error_setg(errp, "Bus '%s' not found", elem);
 508             qbus_list_bus(dev, errp);
 509             return NULL;
 510         }
 511     }
 512
 513     if (qbus_is_full(bus)) {
 514         error_setg(errp, "Bus '%s' is full", path);
 515         return NULL;
 516     }
 517     return bus;
 518 }
 519
 520 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 521 {
 522     DeviceClass *dc;
 523     const char *driver, *path, *id;
 524     DeviceState *dev;
 525     BusState *bus = NULL;
 526     Error *err = NULL;
 527
 528     driver = qemu_opt_get(opts, "driver");
 529     if (!driver) {
 530         error_setg(errp, QERR_MISSING_PARAMETER, "driver");
 531         return NULL;
 532     }
 533
 534     /* find driver */
 535     dc = qdev_get_device_class(&driver, errp);
 536     if (!dc) {
 537         return NULL;
 538     }
 539
 540     /* find bus */
 541     path = qemu_opt_get(opts, "bus");
 542     if (path != NULL) {
 543         bus = qbus_find(path, errp);
 544         if (!bus) {
 545             return NULL;
 546         }
 547         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 548             error_setg(errp, "Device '%s' can't go on %s bus",
 549                        driver, object_get_typename(OBJECT(bus)));
 550             return NULL;
 551         }
 552     } else if (dc->bus_type != NULL) {
 553         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 554         if (!bus || qbus_is_full(bus)) {
 555             error_setg(errp, "No '%s' bus found for device '%s'",
 556                        dc->bus_type, driver);
 557             return NULL;
 558         }
 559     }
 560     if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
 561         error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
 562         return NULL;
 563     }
 564
 565     /* create device */
 566     dev = DEVICE(object_new(driver));
 567
 568     if (bus) {
 569         qdev_set_parent_bus(dev, bus);
 570     }
 571
 572     id = qemu_opts_id(opts);
 573     if (id) {
 574         dev->id = id;
 575     }
 576
 577     if (dev->id) {
 578         object_property_add_child(qdev_get_peripheral(), dev->id,
 579                                   OBJECT(dev), NULL);
 580     } else {
 581         static int anon_count;
 582         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 583         object_property_add_child(qdev_get_peripheral_anon(), name,
 584                                   OBJECT(dev), NULL);
 585         g_free(name);
 586     }
 587
 588     /* set properties */
 589     if (qemu_opt_foreach(opts, set_property, dev, &err)) {
 590         error_propagate(errp, err);
 591         object_unparent(OBJECT(dev));
 592         object_unref(OBJECT(dev));
 593         return NULL;
 594     }
 595
 596     dev->opts = opts;
 597     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 598     if (err != NULL) {
 599         error_propagate(errp, err);
 600         dev->opts = NULL;
 601         object_unparent(OBJECT(dev));
 602         object_unref(OBJECT(dev));
 603         return NULL;
 604     }
 605     return dev;
 606 }
 607
 608
 609 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 610 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 611
 612 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 613                              int indent)
 614 {
 615     if (!props)
 616         return;
 617     for (; props->name; props++) {
 618         Error *err = NULL;
 619         char *value;
 620         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 621         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 622             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 623         } else {
 624             value = object_property_print(OBJECT(dev), props->name, true, &err);
 625         }
 626         g_free(legacy_name);
 627
 628         if (err) {
 629             error_free(err);
 630             continue;
 631         }
 632         qdev_printf("%s = %s\n", props->name,
 633                     value && *value ? value : "<null>");
 634         g_free(value);
 635     }
 636 }
 637
 638 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 639 {
 640     BusClass *bc = BUS_GET_CLASS(bus);
 641
 642     if (bc->print_dev) {
 643         bc->print_dev(mon, dev, indent);
 644     }
 645 }
 646
 647 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 648 {
 649     ObjectClass *class;
 650     BusState *child;
 651     NamedGPIOList *ngl;
 652
 653     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 654                 dev->id ? dev->id : "");
 655     indent += 2;
 656     QLIST_FOREACH(ngl, &dev->gpios, node) {
 657         if (ngl->num_in) {
 658             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 659                         ngl->num_in);
 660         }
 661         if (ngl->num_out) {
 662             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 663                         ngl->num_out);
 664         }
 665     }
 666     class = object_get_class(OBJECT(dev));
 667     do {
 668         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 669         class = object_class_get_parent(class);
 670     } while (class != object_class_by_name(TYPE_DEVICE));
 671     bus_print_dev(dev->parent_bus, mon, dev, indent);
 672     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 673         qbus_print(mon, child, indent);
 674     }
 675 }
 676
 677 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 678 {
 679     BusChild *kid;
 680
 681     qdev_printf("bus: %s\n", bus->name);
 682     indent += 2;
 683     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 684     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 685         DeviceState *dev = kid->child;
 686         qdev_print(mon, dev, indent);
 687     }
 688 }
 689 #undef qdev_printf
 690
 691 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
 692 {
 693     if (sysbus_get_default())
 694         qbus_print(mon, sysbus_get_default(), 0);
 695 }
 696
 697 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
 698 {
 699     qdev_print_devinfos(true);
 700 }
 701
 702 typedef struct QOMCompositionState {
 703     Monitor *mon;
 704     int indent;
 705 } QOMCompositionState;
 706
 707 static void print_qom_composition(Monitor *mon, Object *obj, int indent);
 708
 709 static int print_qom_composition_child(Object *obj, void *opaque)
 710 {
 711     QOMCompositionState *s = opaque;
 712
 713     print_qom_composition(s->mon, obj, s->indent);
 714
 715     return 0;
 716 }
 717
 718 static void print_qom_composition(Monitor *mon, Object *obj, int indent)
 719 {
 720     QOMCompositionState s = {
 721         .mon = mon,
 722         .indent = indent + 2,
 723     };
 724     char *name;
 725
 726     if (obj == object_get_root()) {
 727         name = g_strdup("");
 728     } else {
 729         name = object_get_canonical_path_component(obj);
 730     }
 731     monitor_printf(mon, "%*s/%s (%s)\n", indent, "", name,
 732                    object_get_typename(obj));
 733     g_free(name);
 734     object_child_foreach(obj, print_qom_composition_child, &s);
 735 }
 736
 737 void hmp_info_qom_tree(Monitor *mon, const QDict *dict)
 738 {
 739     const char *path = qdict_get_try_str(dict, "path");
 740     Object *obj;
 741     bool ambiguous = false;
 742
 743     if (path) {
 744         obj = object_resolve_path(path, &ambiguous);
 745         if (!obj) {
 746             monitor_printf(mon, "Path '%s' could not be resolved.\n", path);
 747             return;
 748         }
 749         if (ambiguous) {
 750             monitor_printf(mon, "Warning: Path '%s' is ambiguous.\n", path);
 751             return;
 752         }
 753     } else {
 754         obj = qdev_get_machine();
 755     }
 756     print_qom_composition(mon, obj, 0);
 757 }
 758
 759 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
 760 {
 761     Error *local_err = NULL;
 762     QemuOpts *opts;
 763     DeviceState *dev;
 764
 765     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 766     if (local_err) {
 767         error_propagate(errp, local_err);
 768         return;
 769     }
 770     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 771         qemu_opts_del(opts);
 772         return;
 773     }
 774     dev = qdev_device_add(opts, &local_err);
 775     if (!dev) {
 776         error_propagate(errp, local_err);
 777         qemu_opts_del(opts);
 778         return;
 779     }
 780     object_unref(OBJECT(dev));
 781 }
 782
 783 void qmp_device_del(const char *id, Error **errp)
 784 {
 785     Object *obj;
 786
 787     if (id[0] == '/') {
 788         obj = object_resolve_path(id, NULL);
 789     } else {
 790         char *root_path = object_get_canonical_path(qdev_get_peripheral());
 791         char *path = g_strdup_printf("%s/%s", root_path, id);
 792
 793         g_free(root_path);
 794         obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 795         g_free(path);
 796     }
 797
 798     if (!obj) {
 799         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 800                   "Device '%s' not found", id);
 801         return;
 802     }
 803
 804     if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
 805         error_setg(errp, "%s is not a hotpluggable device", id);
 806         return;
 807     }
 808
 809     qdev_unplug(DEVICE(obj), errp);
 810 }
 811
 812 void qdev_machine_init(void)
 813 {
 814     qdev_get_peripheral_anon();
 815     qdev_get_peripheral();
 816 }
 817
 818 QemuOptsList qemu_device_opts = {
 819     .name = "device",
 820     .implied_opt_name = "driver",
 821     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 822     .desc = {
 823         /*
 824          * no elements => accept any
 825          * sanity checking will happen later
 826          * when setting device properties
 827          */
 828         { /* end of list */ }
 829     },
 830 };
 831
 832 QemuOptsList qemu_global_opts = {
 833     .name = "global",
 834     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 835     .desc = {
 836         {
 837             .name = "driver",
 838             .type = QEMU_OPT_STRING,
 839         },{
 840             .name = "property",
 841             .type = QEMU_OPT_STRING,
 842         },{
 843             .name = "value",
 844             .type = QEMU_OPT_STRING,
 845         },
 846         { /* end of list */ }
 847     },
 848 };
 849
 850 int qemu_global_option(const char *str)
 851 {
 852     char driver[64], property[64];
 853     QemuOpts *opts;
 854     int rc, offset;
 855
 856     rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
 857     if (rc == 2 && str[offset] == '=') {
 858         opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 859         qemu_opt_set(opts, "driver", driver, &error_abort);
 860         qemu_opt_set(opts, "property", property, &error_abort);
 861         qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
 862         return 0;
 863     }
 864
 865     opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
 866     if (!opts) {
 867         return -1;
 868     }
 869
 870     return 0;
 871 }