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         error_propagate(errp, err);
 160         return -1;
 161     }
 162     return 0;
 163 }
 164
 165 static const char *find_typename_by_alias(const char *alias)
 166 {
 167     int i;
 168
 169     for (i = 0; qdev_alias_table[i].alias; i++) {
 170         if (qdev_alias_table[i].arch_mask &&
 171             !(qdev_alias_table[i].arch_mask & arch_type)) {
 172             continue;
 173         }
 174
 175         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 176             return qdev_alias_table[i].typename;
 177         }
 178     }
 179
 180     return NULL;
 181 }
 182
 183 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
 184 {
 185     ObjectClass *oc;
 186     DeviceClass *dc;
 187
 188     oc = object_class_by_name(*driver);
 189     if (!oc) {
 190         const char *typename = find_typename_by_alias(*driver);
 191
 192         if (typename) {
 193             *driver = typename;
 194             oc = object_class_by_name(*driver);
 195         }
 196     }
 197
 198     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 199         error_setg(errp, "'%s' is not a valid device model name", *driver);
 200         return NULL;
 201     }
 202
 203     if (object_class_is_abstract(oc)) {
 204         error_set(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 205                   "non-abstract device type");
 206         return NULL;
 207     }
 208
 209     dc = DEVICE_CLASS(oc);
 210     if (dc->cannot_instantiate_with_device_add_yet ||
 211         (qdev_hotplug && !dc->hotpluggable)) {
 212         error_set(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 213                   "pluggable device type");
 214         return NULL;
 215     }
 216
 217     return dc;
 218 }
 219
 220
 221 int qdev_device_help(QemuOpts *opts)
 222 {
 223     Error *local_err = NULL;
 224     const char *driver;
 225     DevicePropertyInfoList *prop_list;
 226     DevicePropertyInfoList *prop;
 227
 228     driver = qemu_opt_get(opts, "driver");
 229     if (driver && is_help_option(driver)) {
 230         qdev_print_devinfos(false);
 231         return 1;
 232     }
 233
 234     if (!driver || !qemu_opt_has_help_opt(opts)) {
 235         return 0;
 236     }
 237
 238     qdev_get_device_class(&driver, &local_err);
 239     if (local_err) {
 240         goto error;
 241     }
 242
 243     prop_list = qmp_device_list_properties(driver, &local_err);
 244     if (local_err) {
 245         goto error;
 246     }
 247
 248     for (prop = prop_list; prop; prop = prop->next) {
 249         error_printf("%s.%s=%s", driver,
 250                      prop->value->name,
 251                      prop->value->type);
 252         if (prop->value->has_description) {
 253             error_printf(" (%s)\n", prop->value->description);
 254         } else {
 255             error_printf("\n");
 256         }
 257     }
 258
 259     qapi_free_DevicePropertyInfoList(prop_list);
 260     return 1;
 261
 262 error:
 263     error_printf("%s\n", error_get_pretty(local_err));
 264     error_free(local_err);
 265     return 1;
 266 }
 267
 268 static Object *qdev_get_peripheral(void)
 269 {
 270     static Object *dev;
 271
 272     if (dev == NULL) {
 273         dev = container_get(qdev_get_machine(), "/peripheral");
 274     }
 275
 276     return dev;
 277 }
 278
 279 static Object *qdev_get_peripheral_anon(void)
 280 {
 281     static Object *dev;
 282
 283     if (dev == NULL) {
 284         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 285     }
 286
 287     return dev;
 288 }
 289
 290 #if 0 /* conversion from qerror_report() to error_set() broke their use */
 291 static void qbus_list_bus(DeviceState *dev)
 292 {
 293     BusState *child;
 294     const char *sep = " ";
 295
 296     error_printf("child buses 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 #endif
 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, QERR_DEVICE_NOT_FOUND, elem);
 461 #if 0 /* conversion from qerror_report() to error_set() broke this: */
 462             if (!monitor_cur_is_qmp()) {
 463                 qbus_list_dev(bus);
 464             }
 465 #endif
 466             return NULL;
 467         }
 468
 469         assert(path[pos] == '/' || !path[pos]);
 470         while (path[pos] == '/') {
 471             pos++;
 472         }
 473         if (path[pos] == '\0') {
 474             /* last specified element is a device.  If it has exactly
 475              * one child bus accept it nevertheless */
 476             if (dev->num_child_bus == 1) {
 477                 bus = QLIST_FIRST(&dev->child_bus);
 478                 break;
 479             }
 480             if (dev->num_child_bus) {
 481                 error_setg(errp, "Device '%s' has multiple child buses",
 482                            elem);
 483 #if 0 /* conversion from qerror_report() to error_set() broke this: */
 484                 if (!monitor_cur_is_qmp()) {
 485                     qbus_list_bus(dev);
 486                 }
 487 #endif
 488             } else {
 489                 error_setg(errp, "Device '%s' has no child bus", elem);
 490             }
 491             return NULL;
 492         }
 493
 494         /* find bus */
 495         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 496             g_assert_not_reached();
 497             elem[0] = len = 0;
 498         }
 499         pos += len;
 500         bus = qbus_find_bus(dev, elem);
 501         if (!bus) {
 502             error_setg(errp, "Bus '%s' not found", elem);
 503 #if 0 /* conversion from qerror_report() to error_set() broke this: */
 504             if (!monitor_cur_is_qmp()) {
 505                 qbus_list_bus(dev);
 506             }
 507 #endif
 508             return NULL;
 509         }
 510     }
 511
 512     if (qbus_is_full(bus)) {
 513         error_setg(errp, "Bus '%s' is full", path);
 514         return NULL;
 515     }
 516     return bus;
 517 }
 518
 519 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 520 {
 521     DeviceClass *dc;
 522     const char *driver, *path, *id;
 523     DeviceState *dev;
 524     BusState *bus = NULL;
 525     Error *err = NULL;
 526
 527     driver = qemu_opt_get(opts, "driver");
 528     if (!driver) {
 529         error_set(errp, QERR_MISSING_PARAMETER, "driver");
 530         return NULL;
 531     }
 532
 533     /* find driver */
 534     dc = qdev_get_device_class(&driver, errp);
 535     if (!dc) {
 536         return NULL;
 537     }
 538
 539     /* find bus */
 540     path = qemu_opt_get(opts, "bus");
 541     if (path != NULL) {
 542         bus = qbus_find(path, errp);
 543         if (!bus) {
 544             return NULL;
 545         }
 546         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 547             error_setg(errp, "Device '%s' can't go on %s bus",
 548                        driver, object_get_typename(OBJECT(bus)));
 549             return NULL;
 550         }
 551     } else if (dc->bus_type != NULL) {
 552         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 553         if (!bus || qbus_is_full(bus)) {
 554             error_setg(errp, "No '%s' bus found for device '%s'",
 555                        dc->bus_type, driver);
 556             return NULL;
 557         }
 558     }
 559     if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
 560         error_set(errp, QERR_BUS_NO_HOTPLUG, bus->name);
 561         return NULL;
 562     }
 563
 564     /* create device */
 565     dev = DEVICE(object_new(driver));
 566
 567     if (bus) {
 568         qdev_set_parent_bus(dev, bus);
 569     }
 570
 571     id = qemu_opts_id(opts);
 572     if (id) {
 573         dev->id = id;
 574     }
 575
 576     if (dev->id) {
 577         object_property_add_child(qdev_get_peripheral(), dev->id,
 578                                   OBJECT(dev), NULL);
 579     } else {
 580         static int anon_count;
 581         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 582         object_property_add_child(qdev_get_peripheral_anon(), name,
 583                                   OBJECT(dev), NULL);
 584         g_free(name);
 585     }
 586
 587     /* set properties */
 588     if (qemu_opt_foreach(opts, set_property, dev, &err)) {
 589         error_propagate(errp, err);
 590         object_unparent(OBJECT(dev));
 591         object_unref(OBJECT(dev));
 592         return NULL;
 593     }
 594
 595     dev->opts = opts;
 596     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 597     if (err != NULL) {
 598         error_propagate(errp, err);
 599         dev->opts = NULL;
 600         object_unparent(OBJECT(dev));
 601         object_unref(OBJECT(dev));
 602         return NULL;
 603     }
 604     return dev;
 605 }
 606
 607
 608 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 609 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 610
 611 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 612                              int indent)
 613 {
 614     if (!props)
 615         return;
 616     for (; props->name; props++) {
 617         Error *err = NULL;
 618         char *value;
 619         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 620         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 621             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 622         } else {
 623             value = object_property_print(OBJECT(dev), props->name, true, &err);
 624         }
 625         g_free(legacy_name);
 626
 627         if (err) {
 628             error_free(err);
 629             continue;
 630         }
 631         qdev_printf("%s = %s\n", props->name,
 632                     value && *value ? value : "<null>");
 633         g_free(value);
 634     }
 635 }
 636
 637 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 638 {
 639     BusClass *bc = BUS_GET_CLASS(bus);
 640
 641     if (bc->print_dev) {
 642         bc->print_dev(mon, dev, indent);
 643     }
 644 }
 645
 646 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 647 {
 648     ObjectClass *class;
 649     BusState *child;
 650     NamedGPIOList *ngl;
 651
 652     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 653                 dev->id ? dev->id : "");
 654     indent += 2;
 655     QLIST_FOREACH(ngl, &dev->gpios, node) {
 656         if (ngl->num_in) {
 657             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 658                         ngl->num_in);
 659         }
 660         if (ngl->num_out) {
 661             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 662                         ngl->num_out);
 663         }
 664     }
 665     class = object_get_class(OBJECT(dev));
 666     do {
 667         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 668         class = object_class_get_parent(class);
 669     } while (class != object_class_by_name(TYPE_DEVICE));
 670     bus_print_dev(dev->parent_bus, mon, dev, indent);
 671     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 672         qbus_print(mon, child, indent);
 673     }
 674 }
 675
 676 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 677 {
 678     BusChild *kid;
 679
 680     qdev_printf("bus: %s\n", bus->name);
 681     indent += 2;
 682     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 683     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 684         DeviceState *dev = kid->child;
 685         qdev_print(mon, dev, indent);
 686     }
 687 }
 688 #undef qdev_printf
 689
 690 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
 691 {
 692     if (sysbus_get_default())
 693         qbus_print(mon, sysbus_get_default(), 0);
 694 }
 695
 696 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
 697 {
 698     qdev_print_devinfos(true);
 699 }
 700
 701 typedef struct QOMCompositionState {
 702     Monitor *mon;
 703     int indent;
 704 } QOMCompositionState;
 705
 706 static void print_qom_composition(Monitor *mon, Object *obj, int indent);
 707
 708 static int print_qom_composition_child(Object *obj, void *opaque)
 709 {
 710     QOMCompositionState *s = opaque;
 711
 712     print_qom_composition(s->mon, obj, s->indent);
 713
 714     return 0;
 715 }
 716
 717 static void print_qom_composition(Monitor *mon, Object *obj, int indent)
 718 {
 719     QOMCompositionState s = {
 720         .mon = mon,
 721         .indent = indent + 2,
 722     };
 723     char *name;
 724
 725     if (obj == object_get_root()) {
 726         name = g_strdup("");
 727     } else {
 728         name = object_get_canonical_path_component(obj);
 729     }
 730     monitor_printf(mon, "%*s/%s (%s)\n", indent, "", name,
 731                    object_get_typename(obj));
 732     g_free(name);
 733     object_child_foreach(obj, print_qom_composition_child, &s);
 734 }
 735
 736 void hmp_info_qom_tree(Monitor *mon, const QDict *dict)
 737 {
 738     const char *path = qdict_get_try_str(dict, "path");
 739     Object *obj;
 740     bool ambiguous = false;
 741
 742     if (path) {
 743         obj = object_resolve_path(path, &ambiguous);
 744         if (!obj) {
 745             monitor_printf(mon, "Path '%s' could not be resolved.\n", path);
 746             return;
 747         }
 748         if (ambiguous) {
 749             monitor_printf(mon, "Warning: Path '%s' is ambiguous.\n", path);
 750             return;
 751         }
 752     } else {
 753         obj = qdev_get_machine();
 754     }
 755     print_qom_composition(mon, obj, 0);
 756 }
 757
 758 int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
 759 {
 760     Error *local_err = NULL;
 761     QemuOpts *opts;
 762     DeviceState *dev;
 763
 764     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 765     if (local_err) {
 766         qerror_report_err(local_err);
 767         error_free(local_err);
 768         return -1;
 769     }
 770     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 771         qemu_opts_del(opts);
 772         return 0;
 773     }
 774     dev = qdev_device_add(opts, &local_err);
 775     if (!dev) {
 776         qerror_report_err(local_err);
 777         error_free(local_err);
 778         qemu_opts_del(opts);
 779         return -1;
 780     }
 781     object_unref(OBJECT(dev));
 782     return 0;
 783 }
 784
 785 void qmp_device_del(const char *id, Error **errp)
 786 {
 787     Object *obj;
 788     char *root_path = object_get_canonical_path(qdev_get_peripheral());
 789     char *path = g_strdup_printf("%s/%s", root_path, id);
 790
 791     g_free(root_path);
 792     obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 793     g_free(path);
 794
 795     if (!obj) {
 796         error_set(errp, QERR_DEVICE_NOT_FOUND, id);
 797         return;
 798     }
 799
 800     qdev_unplug(DEVICE(obj), errp);
 801 }
 802
 803 void qdev_machine_init(void)
 804 {
 805     qdev_get_peripheral_anon();
 806     qdev_get_peripheral();
 807 }
 808
 809 QemuOptsList qemu_device_opts = {
 810     .name = "device",
 811     .implied_opt_name = "driver",
 812     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 813     .desc = {
 814         /*
 815          * no elements => accept any
 816          * sanity checking will happen later
 817          * when setting device properties
 818          */
 819         { /* end of list */ }
 820     },
 821 };
 822
 823 QemuOptsList qemu_global_opts = {
 824     .name = "global",
 825     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 826     .desc = {
 827         {
 828             .name = "driver",
 829             .type = QEMU_OPT_STRING,
 830         },{
 831             .name = "property",
 832             .type = QEMU_OPT_STRING,
 833         },{
 834             .name = "value",
 835             .type = QEMU_OPT_STRING,
 836         },
 837         { /* end of list */ }
 838     },
 839 };
 840
 841 int qemu_global_option(const char *str)
 842 {
 843     char driver[64], property[64];
 844     QemuOpts *opts;
 845     int rc, offset;
 846
 847     rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
 848     if (rc == 2 && str[offset] == '=') {
 849         opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 850         qemu_opt_set(opts, "driver", driver, &error_abort);
 851         qemu_opt_set(opts, "property", property, &error_abort);
 852         qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
 853         return 0;
 854     }
 855
 856     opts = qemu_opts_parse(&qemu_global_opts, str, false);
 857     if (!opts) {
 858         return -1;
 859     }
 860
 861     return 0;
 862 }