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_printf("%s\n", error_get_pretty(local_err));
 270     error_free(local_err);
 271     return 1;
 272 }
 273
 274 static Object *qdev_get_peripheral(void)
 275 {
 276     static Object *dev;
 277
 278     if (dev == NULL) {
 279         dev = container_get(qdev_get_machine(), "/peripheral");
 280     }
 281
 282     return dev;
 283 }
 284
 285 static Object *qdev_get_peripheral_anon(void)
 286 {
 287     static Object *dev;
 288
 289     if (dev == NULL) {
 290         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 291     }
 292
 293     return dev;
 294 }
 295
 296 static void qbus_list_bus(DeviceState *dev, Error **errp)
 297 {
 298     BusState *child;
 299     const char *sep = " ";
 300
 301     error_append_hint(errp, "child buses at \"%s\":",
 302                       dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 303     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 304         error_append_hint(errp, "%s\"%s\"", sep, child->name);
 305         sep = ", ";
 306     }
 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 }
 325
 326 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 327 {
 328     BusState *child;
 329
 330     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 331         if (strcmp(child->name, elem) == 0) {
 332             return child;
 333         }
 334     }
 335     return NULL;
 336 }
 337
 338 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 339 {
 340     BusChild *kid;
 341
 342     /*
 343      * try to match in order:
 344      *   (1) instance id, if present
 345      *   (2) driver name
 346      *   (3) driver alias, if present
 347      */
 348     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 349         DeviceState *dev = kid->child;
 350         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 351             return dev;
 352         }
 353     }
 354     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 355         DeviceState *dev = kid->child;
 356         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 357             return dev;
 358         }
 359     }
 360     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 361         DeviceState *dev = kid->child;
 362         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 363
 364         if (qdev_class_has_alias(dc) &&
 365             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 366             return dev;
 367         }
 368     }
 369     return NULL;
 370 }
 371
 372 static inline bool qbus_is_full(BusState *bus)
 373 {
 374     BusClass *bus_class = BUS_GET_CLASS(bus);
 375     return bus_class->max_dev && bus->max_index >= bus_class->max_dev;
 376 }
 377
 378 /*
 379  * Search the tree rooted at @bus for a bus.
 380  * If @name, search for a bus with that name.  Note that bus names
 381  * need not be unique.  Yes, that's screwed up.
 382  * Else search for a bus that is a subtype of @bus_typename.
 383  * If more than one exists, prefer one that can take another device.
 384  * Return the bus if found, else %NULL.
 385  */
 386 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 387                                      const char *bus_typename)
 388 {
 389     BusChild *kid;
 390     BusState *pick, *child, *ret;
 391     bool match;
 392
 393     assert(name || bus_typename);
 394     if (name) {
 395         match = !strcmp(bus->name, name);
 396     } else {
 397         match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
 398     }
 399
 400     if (match && !qbus_is_full(bus)) {
 401         return bus;             /* root matches and isn't full */
 402     }
 403
 404     pick = match ? bus : NULL;
 405
 406     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 407         DeviceState *dev = kid->child;
 408         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 409             ret = qbus_find_recursive(child, name, bus_typename);
 410             if (ret && !qbus_is_full(ret)) {
 411                 return ret;     /* a descendant matches and isn't full */
 412             }
 413             if (ret && !pick) {
 414                 pick = ret;
 415             }
 416         }
 417     }
 418
 419     /* root or a descendant matches, but is full */
 420     return pick;
 421 }
 422
 423 static BusState *qbus_find(const char *path, Error **errp)
 424 {
 425     DeviceState *dev;
 426     BusState *bus;
 427     char elem[128];
 428     int pos, len;
 429
 430     /* find start element */
 431     if (path[0] == '/') {
 432         bus = sysbus_get_default();
 433         pos = 0;
 434     } else {
 435         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 436             assert(!path[0]);
 437             elem[0] = len = 0;
 438         }
 439         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 440         if (!bus) {
 441             error_setg(errp, "Bus '%s' not found", elem);
 442             return NULL;
 443         }
 444         pos = len;
 445     }
 446
 447     for (;;) {
 448         assert(path[pos] == '/' || !path[pos]);
 449         while (path[pos] == '/') {
 450             pos++;
 451         }
 452         if (path[pos] == '\0') {
 453             break;
 454         }
 455
 456         /* find device */
 457         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 458             g_assert_not_reached();
 459             elem[0] = len = 0;
 460         }
 461         pos += len;
 462         dev = qbus_find_dev(bus, elem);
 463         if (!dev) {
 464             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 465                       "Device '%s' not found", elem);
 466             qbus_list_dev(bus, errp);
 467             return NULL;
 468         }
 469
 470         assert(path[pos] == '/' || !path[pos]);
 471         while (path[pos] == '/') {
 472             pos++;
 473         }
 474         if (path[pos] == '\0') {
 475             /* last specified element is a device.  If it has exactly
 476              * one child bus accept it nevertheless */
 477             if (dev->num_child_bus == 1) {
 478                 bus = QLIST_FIRST(&dev->child_bus);
 479                 break;
 480             }
 481             if (dev->num_child_bus) {
 482                 error_setg(errp, "Device '%s' has multiple child buses",
 483                            elem);
 484                 qbus_list_bus(dev, errp);
 485             } else {
 486                 error_setg(errp, "Device '%s' has no child bus", elem);
 487             }
 488             return NULL;
 489         }
 490
 491         /* find bus */
 492         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 493             g_assert_not_reached();
 494             elem[0] = len = 0;
 495         }
 496         pos += len;
 497         bus = qbus_find_bus(dev, elem);
 498         if (!bus) {
 499             error_setg(errp, "Bus '%s' not found", elem);
 500             qbus_list_bus(dev, errp);
 501             return NULL;
 502         }
 503     }
 504
 505     if (qbus_is_full(bus)) {
 506         error_setg(errp, "Bus '%s' is full", path);
 507         return NULL;
 508     }
 509     return bus;
 510 }
 511
 512 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 513 {
 514     DeviceClass *dc;
 515     const char *driver, *path, *id;
 516     DeviceState *dev;
 517     BusState *bus = NULL;
 518     Error *err = NULL;
 519
 520     driver = qemu_opt_get(opts, "driver");
 521     if (!driver) {
 522         error_setg(errp, QERR_MISSING_PARAMETER, "driver");
 523         return NULL;
 524     }
 525
 526     /* find driver */
 527     dc = qdev_get_device_class(&driver, errp);
 528     if (!dc) {
 529         return NULL;
 530     }
 531
 532     /* find bus */
 533     path = qemu_opt_get(opts, "bus");
 534     if (path != NULL) {
 535         bus = qbus_find(path, errp);
 536         if (!bus) {
 537             return NULL;
 538         }
 539         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 540             error_setg(errp, "Device '%s' can't go on %s bus",
 541                        driver, object_get_typename(OBJECT(bus)));
 542             return NULL;
 543         }
 544     } else if (dc->bus_type != NULL) {
 545         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 546         if (!bus || qbus_is_full(bus)) {
 547             error_setg(errp, "No '%s' bus found for device '%s'",
 548                        dc->bus_type, driver);
 549             return NULL;
 550         }
 551     }
 552     if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
 553         error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
 554         return NULL;
 555     }
 556
 557     /* create device */
 558     dev = DEVICE(object_new(driver));
 559
 560     if (bus) {
 561         qdev_set_parent_bus(dev, bus);
 562     }
 563
 564     id = qemu_opts_id(opts);
 565     if (id) {
 566         dev->id = id;
 567     }
 568
 569     if (dev->id) {
 570         object_property_add_child(qdev_get_peripheral(), dev->id,
 571                                   OBJECT(dev), NULL);
 572     } else {
 573         static int anon_count;
 574         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 575         object_property_add_child(qdev_get_peripheral_anon(), name,
 576                                   OBJECT(dev), NULL);
 577         g_free(name);
 578     }
 579
 580     /* set properties */
 581     if (qemu_opt_foreach(opts, set_property, dev, &err)) {
 582         error_propagate(errp, err);
 583         object_unparent(OBJECT(dev));
 584         object_unref(OBJECT(dev));
 585         return NULL;
 586     }
 587
 588     dev->opts = opts;
 589     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 590     if (err != NULL) {
 591         error_propagate(errp, err);
 592         dev->opts = NULL;
 593         object_unparent(OBJECT(dev));
 594         object_unref(OBJECT(dev));
 595         return NULL;
 596     }
 597     return dev;
 598 }
 599
 600
 601 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 602 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 603
 604 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 605                              int indent)
 606 {
 607     if (!props)
 608         return;
 609     for (; props->name; props++) {
 610         Error *err = NULL;
 611         char *value;
 612         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 613         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 614             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 615         } else {
 616             value = object_property_print(OBJECT(dev), props->name, true, &err);
 617         }
 618         g_free(legacy_name);
 619
 620         if (err) {
 621             error_free(err);
 622             continue;
 623         }
 624         qdev_printf("%s = %s\n", props->name,
 625                     value && *value ? value : "<null>");
 626         g_free(value);
 627     }
 628 }
 629
 630 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 631 {
 632     BusClass *bc = BUS_GET_CLASS(bus);
 633
 634     if (bc->print_dev) {
 635         bc->print_dev(mon, dev, indent);
 636     }
 637 }
 638
 639 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 640 {
 641     ObjectClass *class;
 642     BusState *child;
 643     NamedGPIOList *ngl;
 644
 645     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 646                 dev->id ? dev->id : "");
 647     indent += 2;
 648     QLIST_FOREACH(ngl, &dev->gpios, node) {
 649         if (ngl->num_in) {
 650             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 651                         ngl->num_in);
 652         }
 653         if (ngl->num_out) {
 654             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 655                         ngl->num_out);
 656         }
 657     }
 658     class = object_get_class(OBJECT(dev));
 659     do {
 660         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 661         class = object_class_get_parent(class);
 662     } while (class != object_class_by_name(TYPE_DEVICE));
 663     bus_print_dev(dev->parent_bus, mon, dev, indent);
 664     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 665         qbus_print(mon, child, indent);
 666     }
 667 }
 668
 669 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 670 {
 671     BusChild *kid;
 672
 673     qdev_printf("bus: %s\n", bus->name);
 674     indent += 2;
 675     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 676     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 677         DeviceState *dev = kid->child;
 678         qdev_print(mon, dev, indent);
 679     }
 680 }
 681 #undef qdev_printf
 682
 683 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
 684 {
 685     if (sysbus_get_default())
 686         qbus_print(mon, sysbus_get_default(), 0);
 687 }
 688
 689 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
 690 {
 691     qdev_print_devinfos(true);
 692 }
 693
 694 typedef struct QOMCompositionState {
 695     Monitor *mon;
 696     int indent;
 697 } QOMCompositionState;
 698
 699 static void print_qom_composition(Monitor *mon, Object *obj, int indent);
 700
 701 static int print_qom_composition_child(Object *obj, void *opaque)
 702 {
 703     QOMCompositionState *s = opaque;
 704
 705     print_qom_composition(s->mon, obj, s->indent);
 706
 707     return 0;
 708 }
 709
 710 static void print_qom_composition(Monitor *mon, Object *obj, int indent)
 711 {
 712     QOMCompositionState s = {
 713         .mon = mon,
 714         .indent = indent + 2,
 715     };
 716     char *name;
 717
 718     if (obj == object_get_root()) {
 719         name = g_strdup("");
 720     } else {
 721         name = object_get_canonical_path_component(obj);
 722     }
 723     monitor_printf(mon, "%*s/%s (%s)\n", indent, "", name,
 724                    object_get_typename(obj));
 725     g_free(name);
 726     object_child_foreach(obj, print_qom_composition_child, &s);
 727 }
 728
 729 void hmp_info_qom_tree(Monitor *mon, const QDict *dict)
 730 {
 731     const char *path = qdict_get_try_str(dict, "path");
 732     Object *obj;
 733     bool ambiguous = false;
 734
 735     if (path) {
 736         obj = object_resolve_path(path, &ambiguous);
 737         if (!obj) {
 738             monitor_printf(mon, "Path '%s' could not be resolved.\n", path);
 739             return;
 740         }
 741         if (ambiguous) {
 742             monitor_printf(mon, "Warning: Path '%s' is ambiguous.\n", path);
 743             return;
 744         }
 745     } else {
 746         obj = qdev_get_machine();
 747     }
 748     print_qom_composition(mon, obj, 0);
 749 }
 750
 751 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
 752 {
 753     Error *local_err = NULL;
 754     QemuOpts *opts;
 755     DeviceState *dev;
 756
 757     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 758     if (local_err) {
 759         error_propagate(errp, local_err);
 760         return;
 761     }
 762     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 763         qemu_opts_del(opts);
 764         return;
 765     }
 766     dev = qdev_device_add(opts, &local_err);
 767     if (!dev) {
 768         error_propagate(errp, local_err);
 769         qemu_opts_del(opts);
 770         return;
 771     }
 772     object_unref(OBJECT(dev));
 773 }
 774
 775 void qmp_device_del(const char *id, Error **errp)
 776 {
 777     Object *obj;
 778
 779     if (id[0] == '/') {
 780         obj = object_resolve_path(id, NULL);
 781     } else {
 782         char *root_path = object_get_canonical_path(qdev_get_peripheral());
 783         char *path = g_strdup_printf("%s/%s", root_path, id);
 784
 785         g_free(root_path);
 786         obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 787         g_free(path);
 788     }
 789
 790     if (!obj) {
 791         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 792                   "Device '%s' not found", id);
 793         return;
 794     }
 795
 796     if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
 797         error_setg(errp, "%s is not a hotpluggable device", id);
 798         return;
 799     }
 800
 801     qdev_unplug(DEVICE(obj), errp);
 802 }
 803
 804 void qdev_machine_init(void)
 805 {
 806     qdev_get_peripheral_anon();
 807     qdev_get_peripheral();
 808 }
 809
 810 QemuOptsList qemu_device_opts = {
 811     .name = "device",
 812     .implied_opt_name = "driver",
 813     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 814     .desc = {
 815         /*
 816          * no elements => accept any
 817          * sanity checking will happen later
 818          * when setting device properties
 819          */
 820         { /* end of list */ }
 821     },
 822 };
 823
 824 QemuOptsList qemu_global_opts = {
 825     .name = "global",
 826     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 827     .desc = {
 828         {
 829             .name = "driver",
 830             .type = QEMU_OPT_STRING,
 831         },{
 832             .name = "property",
 833             .type = QEMU_OPT_STRING,
 834         },{
 835             .name = "value",
 836             .type = QEMU_OPT_STRING,
 837         },
 838         { /* end of list */ }
 839     },
 840 };
 841
 842 int qemu_global_option(const char *str)
 843 {
 844     char driver[64], property[64];
 845     QemuOpts *opts;
 846     int rc, offset;
 847
 848     rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
 849     if (rc == 2 && str[offset] == '=') {
 850         opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 851         qemu_opt_set(opts, "driver", driver, &error_abort);
 852         qemu_opt_set(opts, "property", property, &error_abort);
 853         qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
 854         return 0;
 855     }
 856
 857     opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
 858     if (!opts) {
 859         return -1;
 860     }
 861
 862     return 0;
 863 }