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 #include "qemu/error-report.h"
  28
  29 /*
  30  * Aliases were a bad idea from the start.  Let's keep them
  31  * from spreading further.
  32  */
  33 typedef struct QDevAlias
  34 {
  35     const char *typename;
  36     const char *alias;
  37     uint32_t arch_mask;
  38 } QDevAlias;
  39
  40 static const QDevAlias qdev_alias_table[] = {
  41     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  42     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  43     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  44     { "virtio-balloon-pci", "virtio-balloon",
  45             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  46     { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
  47     { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
  48     { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
  49     { "lsi53c895a", "lsi" },
  50     { "ich9-ahci", "ahci" },
  51     { "kvm-pci-assign", "pci-assign" },
  52     { }
  53 };
  54
  55 static const char *qdev_class_get_alias(DeviceClass *dc)
  56 {
  57     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  58     int i;
  59
  60     for (i = 0; qdev_alias_table[i].typename; i++) {
  61         if (qdev_alias_table[i].arch_mask &&
  62             !(qdev_alias_table[i].arch_mask & arch_type)) {
  63             continue;
  64         }
  65
  66         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
  67             return qdev_alias_table[i].alias;
  68         }
  69     }
  70
  71     return NULL;
  72 }
  73
  74 static bool qdev_class_has_alias(DeviceClass *dc)
  75 {
  76     return (qdev_class_get_alias(dc) != NULL);
  77 }
  78
  79 static void qdev_print_devinfo(DeviceClass *dc)
  80 {
  81     error_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
  82     if (dc->bus_type) {
  83         error_printf(", bus %s", dc->bus_type);
  84     }
  85     if (qdev_class_has_alias(dc)) {
  86         error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
  87     }
  88     if (dc->desc) {
  89         error_printf(", desc \"%s\"", dc->desc);
  90     }
  91     if (dc->cannot_instantiate_with_device_add_yet) {
  92         error_printf(", no-user");
  93     }
  94     error_printf("\n");
  95 }
  96
  97 static gint devinfo_cmp(gconstpointer a, gconstpointer b)
  98 {
  99     return strcasecmp(object_class_get_name((ObjectClass *)a),
 100                       object_class_get_name((ObjectClass *)b));
 101 }
 102
 103 static void qdev_print_devinfos(bool show_no_user)
 104 {
 105     static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
 106         [DEVICE_CATEGORY_BRIDGE]  = "Controller/Bridge/Hub",
 107         [DEVICE_CATEGORY_USB]     = "USB",
 108         [DEVICE_CATEGORY_STORAGE] = "Storage",
 109         [DEVICE_CATEGORY_NETWORK] = "Network",
 110         [DEVICE_CATEGORY_INPUT]   = "Input",
 111         [DEVICE_CATEGORY_DISPLAY] = "Display",
 112         [DEVICE_CATEGORY_SOUND]   = "Sound",
 113         [DEVICE_CATEGORY_MISC]    = "Misc",
 114         [DEVICE_CATEGORY_MAX]     = "Uncategorized",
 115     };
 116     GSList *list, *elt;
 117     int i;
 118     bool cat_printed;
 119
 120     list = g_slist_sort(object_class_get_list(TYPE_DEVICE, false),
 121                         devinfo_cmp);
 122
 123     for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
 124         cat_printed = false;
 125         for (elt = list; elt; elt = elt->next) {
 126             DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
 127                                                  TYPE_DEVICE);
 128             if ((i < DEVICE_CATEGORY_MAX
 129                  ? !test_bit(i, dc->categories)
 130                  : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
 131                 || (!show_no_user
 132                     && dc->cannot_instantiate_with_device_add_yet)) {
 133                 continue;
 134             }
 135             if (!cat_printed) {
 136                 error_printf("%s%s devices:\n", i ? "\n" : "",
 137                              cat_name[i]);
 138                 cat_printed = true;
 139             }
 140             qdev_print_devinfo(dc);
 141         }
 142     }
 143
 144     g_slist_free(list);
 145 }
 146
 147 static int set_property(void *opaque, const char *name, const char *value,
 148                         Error **errp)
 149 {
 150     Object *obj = opaque;
 151     Error *err = NULL;
 152
 153     if (strcmp(name, "driver") == 0)
 154         return 0;
 155     if (strcmp(name, "bus") == 0)
 156         return 0;
 157
 158     object_property_parse(obj, value, name, &err);
 159     if (err != NULL) {
 160         error_propagate(errp, 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_setg(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_setg(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 #if 0 /* conversion from qerror_report() to error_set() broke their use */
 292 static void qbus_list_bus(DeviceState *dev)
 293 {
 294     BusState *child;
 295     const char *sep = " ";
 296
 297     error_printf("child buses at \"%s\":",
 298                  dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 299     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 300         error_printf("%s\"%s\"", sep, child->name);
 301         sep = ", ";
 302     }
 303     error_printf("\n");
 304 }
 305
 306 static void qbus_list_dev(BusState *bus)
 307 {
 308     BusChild *kid;
 309     const char *sep = " ";
 310
 311     error_printf("devices at \"%s\":", bus->name);
 312     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 313         DeviceState *dev = kid->child;
 314         error_printf("%s\"%s\"", sep, object_get_typename(OBJECT(dev)));
 315         if (dev->id)
 316             error_printf("/\"%s\"", dev->id);
 317         sep = ", ";
 318     }
 319     error_printf("\n");
 320 }
 321 #endif
 322
 323 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 324 {
 325     BusState *child;
 326
 327     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 328         if (strcmp(child->name, elem) == 0) {
 329             return child;
 330         }
 331     }
 332     return NULL;
 333 }
 334
 335 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 336 {
 337     BusChild *kid;
 338
 339     /*
 340      * try to match in order:
 341      *   (1) instance id, if present
 342      *   (2) driver name
 343      *   (3) driver alias, if present
 344      */
 345     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 346         DeviceState *dev = kid->child;
 347         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 348             return dev;
 349         }
 350     }
 351     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 352         DeviceState *dev = kid->child;
 353         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 354             return dev;
 355         }
 356     }
 357     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 358         DeviceState *dev = kid->child;
 359         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 360
 361         if (qdev_class_has_alias(dc) &&
 362             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 363             return dev;
 364         }
 365     }
 366     return NULL;
 367 }
 368
 369 static inline bool qbus_is_full(BusState *bus)
 370 {
 371     BusClass *bus_class = BUS_GET_CLASS(bus);
 372     return bus_class->max_dev && bus->max_index >= bus_class->max_dev;
 373 }
 374
 375 /*
 376  * Search the tree rooted at @bus for a bus.
 377  * If @name, search for a bus with that name.  Note that bus names
 378  * need not be unique.  Yes, that's screwed up.
 379  * Else search for a bus that is a subtype of @bus_typename.
 380  * If more than one exists, prefer one that can take another device.
 381  * Return the bus if found, else %NULL.
 382  */
 383 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 384                                      const char *bus_typename)
 385 {
 386     BusChild *kid;
 387     BusState *pick, *child, *ret;
 388     bool match;
 389
 390     assert(name || bus_typename);
 391     if (name) {
 392         match = !strcmp(bus->name, name);
 393     } else {
 394         match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
 395     }
 396
 397     if (match && !qbus_is_full(bus)) {
 398         return bus;             /* root matches and isn't full */
 399     }
 400
 401     pick = match ? bus : NULL;
 402
 403     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 404         DeviceState *dev = kid->child;
 405         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 406             ret = qbus_find_recursive(child, name, bus_typename);
 407             if (ret && !qbus_is_full(ret)) {
 408                 return ret;     /* a descendant matches and isn't full */
 409             }
 410             if (ret && !pick) {
 411                 pick = ret;
 412             }
 413         }
 414     }
 415
 416     /* root or a descendant matches, but is full */
 417     return pick;
 418 }
 419
 420 static BusState *qbus_find(const char *path, Error **errp)
 421 {
 422     DeviceState *dev;
 423     BusState *bus;
 424     char elem[128];
 425     int pos, len;
 426
 427     /* find start element */
 428     if (path[0] == '/') {
 429         bus = sysbus_get_default();
 430         pos = 0;
 431     } else {
 432         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 433             assert(!path[0]);
 434             elem[0] = len = 0;
 435         }
 436         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 437         if (!bus) {
 438             error_setg(errp, "Bus '%s' not found", elem);
 439             return NULL;
 440         }
 441         pos = len;
 442     }
 443
 444     for (;;) {
 445         assert(path[pos] == '/' || !path[pos]);
 446         while (path[pos] == '/') {
 447             pos++;
 448         }
 449         if (path[pos] == '\0') {
 450             break;
 451         }
 452
 453         /* find device */
 454         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 455             g_assert_not_reached();
 456             elem[0] = len = 0;
 457         }
 458         pos += len;
 459         dev = qbus_find_dev(bus, elem);
 460         if (!dev) {
 461             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 462                       "Device '%s' not found", elem);
 463 #if 0 /* conversion from qerror_report() to error_set() broke this: */
 464             if (!monitor_cur_is_qmp()) {
 465                 qbus_list_dev(bus);
 466             }
 467 #endif
 468             return NULL;
 469         }
 470
 471         assert(path[pos] == '/' || !path[pos]);
 472         while (path[pos] == '/') {
 473             pos++;
 474         }
 475         if (path[pos] == '\0') {
 476             /* last specified element is a device.  If it has exactly
 477              * one child bus accept it nevertheless */
 478             if (dev->num_child_bus == 1) {
 479                 bus = QLIST_FIRST(&dev->child_bus);
 480                 break;
 481             }
 482             if (dev->num_child_bus) {
 483                 error_setg(errp, "Device '%s' has multiple child buses",
 484                            elem);
 485 #if 0 /* conversion from qerror_report() to error_set() broke this: */
 486                 if (!monitor_cur_is_qmp()) {
 487                     qbus_list_bus(dev);
 488                 }
 489 #endif
 490             } else {
 491                 error_setg(errp, "Device '%s' has no child bus", elem);
 492             }
 493             return NULL;
 494         }
 495
 496         /* find bus */
 497         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 498             g_assert_not_reached();
 499             elem[0] = len = 0;
 500         }
 501         pos += len;
 502         bus = qbus_find_bus(dev, elem);
 503         if (!bus) {
 504             error_setg(errp, "Bus '%s' not found", elem);
 505 #if 0 /* conversion from qerror_report() to error_set() broke this: */
 506             if (!monitor_cur_is_qmp()) {
 507                 qbus_list_bus(dev);
 508             }
 509 #endif
 510             return NULL;
 511         }
 512     }
 513
 514     if (qbus_is_full(bus)) {
 515         error_setg(errp, "Bus '%s' is full", path);
 516         return NULL;
 517     }
 518     return bus;
 519 }
 520
 521 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 522 {
 523     DeviceClass *dc;
 524     const char *driver, *path, *id;
 525     DeviceState *dev;
 526     BusState *bus = NULL;
 527     Error *err = NULL;
 528
 529     driver = qemu_opt_get(opts, "driver");
 530     if (!driver) {
 531         error_setg(errp, QERR_MISSING_PARAMETER, "driver");
 532         return NULL;
 533     }
 534
 535     /* find driver */
 536     dc = qdev_get_device_class(&driver, errp);
 537     if (!dc) {
 538         return NULL;
 539     }
 540
 541     /* find bus */
 542     path = qemu_opt_get(opts, "bus");
 543     if (path != NULL) {
 544         bus = qbus_find(path, errp);
 545         if (!bus) {
 546             return NULL;
 547         }
 548         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 549             error_setg(errp, "Device '%s' can't go on %s bus",
 550                        driver, object_get_typename(OBJECT(bus)));
 551             return NULL;
 552         }
 553     } else if (dc->bus_type != NULL) {
 554         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 555         if (!bus || qbus_is_full(bus)) {
 556             error_setg(errp, "No '%s' bus found for device '%s'",
 557                        dc->bus_type, driver);
 558             return NULL;
 559         }
 560     }
 561     if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
 562         error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
 563         return NULL;
 564     }
 565
 566     /* create device */
 567     dev = DEVICE(object_new(driver));
 568
 569     if (bus) {
 570         qdev_set_parent_bus(dev, bus);
 571     }
 572
 573     id = qemu_opts_id(opts);
 574     if (id) {
 575         dev->id = id;
 576     }
 577
 578     if (dev->id) {
 579         object_property_add_child(qdev_get_peripheral(), dev->id,
 580                                   OBJECT(dev), NULL);
 581     } else {
 582         static int anon_count;
 583         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 584         object_property_add_child(qdev_get_peripheral_anon(), name,
 585                                   OBJECT(dev), NULL);
 586         g_free(name);
 587     }
 588
 589     /* set properties */
 590     if (qemu_opt_foreach(opts, set_property, dev, &err)) {
 591         error_propagate(errp, err);
 592         object_unparent(OBJECT(dev));
 593         object_unref(OBJECT(dev));
 594         return NULL;
 595     }
 596
 597     dev->opts = opts;
 598     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 599     if (err != NULL) {
 600         error_propagate(errp, err);
 601         dev->opts = NULL;
 602         object_unparent(OBJECT(dev));
 603         object_unref(OBJECT(dev));
 604         return NULL;
 605     }
 606     return dev;
 607 }
 608
 609
 610 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 611 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 612
 613 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 614                              int indent)
 615 {
 616     if (!props)
 617         return;
 618     for (; props->name; props++) {
 619         Error *err = NULL;
 620         char *value;
 621         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 622         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 623             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 624         } else {
 625             value = object_property_print(OBJECT(dev), props->name, true, &err);
 626         }
 627         g_free(legacy_name);
 628
 629         if (err) {
 630             error_free(err);
 631             continue;
 632         }
 633         qdev_printf("%s = %s\n", props->name,
 634                     value && *value ? value : "<null>");
 635         g_free(value);
 636     }
 637 }
 638
 639 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 640 {
 641     BusClass *bc = BUS_GET_CLASS(bus);
 642
 643     if (bc->print_dev) {
 644         bc->print_dev(mon, dev, indent);
 645     }
 646 }
 647
 648 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 649 {
 650     ObjectClass *class;
 651     BusState *child;
 652     NamedGPIOList *ngl;
 653
 654     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 655                 dev->id ? dev->id : "");
 656     indent += 2;
 657     QLIST_FOREACH(ngl, &dev->gpios, node) {
 658         if (ngl->num_in) {
 659             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 660                         ngl->num_in);
 661         }
 662         if (ngl->num_out) {
 663             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 664                         ngl->num_out);
 665         }
 666     }
 667     class = object_get_class(OBJECT(dev));
 668     do {
 669         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 670         class = object_class_get_parent(class);
 671     } while (class != object_class_by_name(TYPE_DEVICE));
 672     bus_print_dev(dev->parent_bus, mon, dev, indent);
 673     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 674         qbus_print(mon, child, indent);
 675     }
 676 }
 677
 678 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 679 {
 680     BusChild *kid;
 681
 682     qdev_printf("bus: %s\n", bus->name);
 683     indent += 2;
 684     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 685     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 686         DeviceState *dev = kid->child;
 687         qdev_print(mon, dev, indent);
 688     }
 689 }
 690 #undef qdev_printf
 691
 692 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
 693 {
 694     if (sysbus_get_default())
 695         qbus_print(mon, sysbus_get_default(), 0);
 696 }
 697
 698 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
 699 {
 700     qdev_print_devinfos(true);
 701 }
 702
 703 typedef struct QOMCompositionState {
 704     Monitor *mon;
 705     int indent;
 706 } QOMCompositionState;
 707
 708 static void print_qom_composition(Monitor *mon, Object *obj, int indent);
 709
 710 static int print_qom_composition_child(Object *obj, void *opaque)
 711 {
 712     QOMCompositionState *s = opaque;
 713
 714     print_qom_composition(s->mon, obj, s->indent);
 715
 716     return 0;
 717 }
 718
 719 static void print_qom_composition(Monitor *mon, Object *obj, int indent)
 720 {
 721     QOMCompositionState s = {
 722         .mon = mon,
 723         .indent = indent + 2,
 724     };
 725     char *name;
 726
 727     if (obj == object_get_root()) {
 728         name = g_strdup("");
 729     } else {
 730         name = object_get_canonical_path_component(obj);
 731     }
 732     monitor_printf(mon, "%*s/%s (%s)\n", indent, "", name,
 733                    object_get_typename(obj));
 734     g_free(name);
 735     object_child_foreach(obj, print_qom_composition_child, &s);
 736 }
 737
 738 void hmp_info_qom_tree(Monitor *mon, const QDict *dict)
 739 {
 740     const char *path = qdict_get_try_str(dict, "path");
 741     Object *obj;
 742     bool ambiguous = false;
 743
 744     if (path) {
 745         obj = object_resolve_path(path, &ambiguous);
 746         if (!obj) {
 747             monitor_printf(mon, "Path '%s' could not be resolved.\n", path);
 748             return;
 749         }
 750         if (ambiguous) {
 751             monitor_printf(mon, "Warning: Path '%s' is ambiguous.\n", path);
 752             return;
 753         }
 754     } else {
 755         obj = qdev_get_machine();
 756     }
 757     print_qom_composition(mon, obj, 0);
 758 }
 759
 760 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
 761 {
 762     Error *local_err = NULL;
 763     QemuOpts *opts;
 764     DeviceState *dev;
 765
 766     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 767     if (local_err) {
 768         error_propagate(errp, local_err);
 769         return;
 770     }
 771     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 772         qemu_opts_del(opts);
 773         return;
 774     }
 775     dev = qdev_device_add(opts, &local_err);
 776     if (!dev) {
 777         error_propagate(errp, local_err);
 778         qemu_opts_del(opts);
 779         return;
 780     }
 781     object_unref(OBJECT(dev));
 782 }
 783
 784 void qmp_device_del(const char *id, Error **errp)
 785 {
 786     Object *obj;
 787     char *root_path = object_get_canonical_path(qdev_get_peripheral());
 788     char *path = g_strdup_printf("%s/%s", root_path, id);
 789
 790     g_free(root_path);
 791     obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 792     g_free(path);
 793
 794     if (!obj) {
 795         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 796                   "Device '%s' 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_noisily(&qemu_global_opts, str, false);
 857     if (!opts) {
 858         return -1;
 859     }
 860
 861     return 0;
 862 }