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 /* Please keep this table sorted by typename. */
  43 static const QDevAlias qdev_alias_table[] = {
  44     { "e1000", "e1000-82540em" },
  45     { "ich9-ahci", "ahci" },
  46     { "kvm-pci-assign", "pci-assign" },
  47     { "lsi53c895a", "lsi" },
  48     { "virtio-balloon-pci", "virtio-balloon",
  49             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  50     { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
  51     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  52     { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
  53     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  54     { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
  55     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  56     { }
  57 };
  58
  59 static const char *qdev_class_get_alias(DeviceClass *dc)
  60 {
  61     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  62     int i;
  63
  64     for (i = 0; qdev_alias_table[i].typename; i++) {
  65         if (qdev_alias_table[i].arch_mask &&
  66             !(qdev_alias_table[i].arch_mask & arch_type)) {
  67             continue;
  68         }
  69
  70         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
  71             return qdev_alias_table[i].alias;
  72         }
  73     }
  74
  75     return NULL;
  76 }
  77
  78 static bool qdev_class_has_alias(DeviceClass *dc)
  79 {
  80     return (qdev_class_get_alias(dc) != NULL);
  81 }
  82
  83 static void qdev_print_devinfo(DeviceClass *dc)
  84 {
  85     error_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
  86     if (dc->bus_type) {
  87         error_printf(", bus %s", dc->bus_type);
  88     }
  89     if (qdev_class_has_alias(dc)) {
  90         error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
  91     }
  92     if (dc->desc) {
  93         error_printf(", desc \"%s\"", dc->desc);
  94     }
  95     if (dc->cannot_instantiate_with_device_add_yet) {
  96         error_printf(", no-user");
  97     }
  98     error_printf("\n");
  99 }
 100
 101 static gint devinfo_cmp(gconstpointer a, gconstpointer b)
 102 {
 103     return strcasecmp(object_class_get_name((ObjectClass *)a),
 104                       object_class_get_name((ObjectClass *)b));
 105 }
 106
 107 static void qdev_print_devinfos(bool show_no_user)
 108 {
 109     static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
 110         [DEVICE_CATEGORY_BRIDGE]  = "Controller/Bridge/Hub",
 111         [DEVICE_CATEGORY_USB]     = "USB",
 112         [DEVICE_CATEGORY_STORAGE] = "Storage",
 113         [DEVICE_CATEGORY_NETWORK] = "Network",
 114         [DEVICE_CATEGORY_INPUT]   = "Input",
 115         [DEVICE_CATEGORY_DISPLAY] = "Display",
 116         [DEVICE_CATEGORY_SOUND]   = "Sound",
 117         [DEVICE_CATEGORY_MISC]    = "Misc",
 118         [DEVICE_CATEGORY_MAX]     = "Uncategorized",
 119     };
 120     GSList *list, *elt;
 121     int i;
 122     bool cat_printed;
 123
 124     list = g_slist_sort(object_class_get_list(TYPE_DEVICE, false),
 125                         devinfo_cmp);
 126
 127     for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
 128         cat_printed = false;
 129         for (elt = list; elt; elt = elt->next) {
 130             DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
 131                                                  TYPE_DEVICE);
 132             if ((i < DEVICE_CATEGORY_MAX
 133                  ? !test_bit(i, dc->categories)
 134                  : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
 135                 || (!show_no_user
 136                     && dc->cannot_instantiate_with_device_add_yet)) {
 137                 continue;
 138             }
 139             if (!cat_printed) {
 140                 error_printf("%s%s devices:\n", i ? "\n" : "",
 141                              cat_name[i]);
 142                 cat_printed = true;
 143             }
 144             qdev_print_devinfo(dc);
 145         }
 146     }
 147
 148     g_slist_free(list);
 149 }
 150
 151 static int set_property(void *opaque, const char *name, const char *value,
 152                         Error **errp)
 153 {
 154     Object *obj = opaque;
 155     Error *err = NULL;
 156
 157     if (strcmp(name, "driver") == 0)
 158         return 0;
 159     if (strcmp(name, "bus") == 0)
 160         return 0;
 161
 162     object_property_parse(obj, value, name, &err);
 163     if (err != NULL) {
 164         error_propagate(errp, err);
 165         return -1;
 166     }
 167     return 0;
 168 }
 169
 170 static const char *find_typename_by_alias(const char *alias)
 171 {
 172     int i;
 173
 174     for (i = 0; qdev_alias_table[i].alias; i++) {
 175         if (qdev_alias_table[i].arch_mask &&
 176             !(qdev_alias_table[i].arch_mask & arch_type)) {
 177             continue;
 178         }
 179
 180         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 181             return qdev_alias_table[i].typename;
 182         }
 183     }
 184
 185     return NULL;
 186 }
 187
 188 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
 189 {
 190     ObjectClass *oc;
 191     DeviceClass *dc;
 192     const char *original_name = *driver;
 193
 194     oc = object_class_by_name(*driver);
 195     if (!oc) {
 196         const char *typename = find_typename_by_alias(*driver);
 197
 198         if (typename) {
 199             *driver = typename;
 200             oc = object_class_by_name(*driver);
 201         }
 202     }
 203
 204     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 205         if (*driver != original_name) {
 206             error_setg(errp, "'%s' (alias '%s') is not a valid device model"
 207                        " name", original_name, *driver);
 208         } else {
 209             error_setg(errp, "'%s' is not a valid device model name", *driver);
 210         }
 211         return NULL;
 212     }
 213
 214     if (object_class_is_abstract(oc)) {
 215         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 216                    "non-abstract device type");
 217         return NULL;
 218     }
 219
 220     dc = DEVICE_CLASS(oc);
 221     if (dc->cannot_instantiate_with_device_add_yet ||
 222         (qdev_hotplug && !dc->hotpluggable)) {
 223         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 224                    "pluggable device type");
 225         return NULL;
 226     }
 227
 228     return dc;
 229 }
 230
 231
 232 int qdev_device_help(QemuOpts *opts)
 233 {
 234     Error *local_err = NULL;
 235     const char *driver;
 236     DevicePropertyInfoList *prop_list;
 237     DevicePropertyInfoList *prop;
 238
 239     driver = qemu_opt_get(opts, "driver");
 240     if (driver && is_help_option(driver)) {
 241         qdev_print_devinfos(false);
 242         return 1;
 243     }
 244
 245     if (!driver || !qemu_opt_has_help_opt(opts)) {
 246         return 0;
 247     }
 248
 249     if (!object_class_by_name(driver)) {
 250         const char *typename = find_typename_by_alias(driver);
 251
 252         if (typename) {
 253             driver = typename;
 254         }
 255     }
 256
 257     prop_list = qmp_device_list_properties(driver, &local_err);
 258     if (local_err) {
 259         goto error;
 260     }
 261
 262     for (prop = prop_list; prop; prop = prop->next) {
 263         error_printf("%s.%s=%s", driver,
 264                      prop->value->name,
 265                      prop->value->type);
 266         if (prop->value->has_description) {
 267             error_printf(" (%s)\n", prop->value->description);
 268         } else {
 269             error_printf("\n");
 270         }
 271     }
 272
 273     qapi_free_DevicePropertyInfoList(prop_list);
 274     return 1;
 275
 276 error:
 277     error_report_err(local_err);
 278     return 1;
 279 }
 280
 281 static Object *qdev_get_peripheral(void)
 282 {
 283     static Object *dev;
 284
 285     if (dev == NULL) {
 286         dev = container_get(qdev_get_machine(), "/peripheral");
 287     }
 288
 289     return dev;
 290 }
 291
 292 static Object *qdev_get_peripheral_anon(void)
 293 {
 294     static Object *dev;
 295
 296     if (dev == NULL) {
 297         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 298     }
 299
 300     return dev;
 301 }
 302
 303 static void qbus_list_bus(DeviceState *dev, Error **errp)
 304 {
 305     BusState *child;
 306     const char *sep = " ";
 307
 308     error_append_hint(errp, "child buses at \"%s\":",
 309                       dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 310     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 311         error_append_hint(errp, "%s\"%s\"", sep, child->name);
 312         sep = ", ";
 313     }
 314     error_append_hint(errp, "\n");
 315 }
 316
 317 static void qbus_list_dev(BusState *bus, Error **errp)
 318 {
 319     BusChild *kid;
 320     const char *sep = " ";
 321
 322     error_append_hint(errp, "devices at \"%s\":", bus->name);
 323     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 324         DeviceState *dev = kid->child;
 325         error_append_hint(errp, "%s\"%s\"", sep,
 326                           object_get_typename(OBJECT(dev)));
 327         if (dev->id) {
 328             error_append_hint(errp, "/\"%s\"", dev->id);
 329         }
 330         sep = ", ";
 331     }
 332     error_append_hint(errp, "\n");
 333 }
 334
 335 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 336 {
 337     BusState *child;
 338
 339     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 340         if (strcmp(child->name, elem) == 0) {
 341             return child;
 342         }
 343     }
 344     return NULL;
 345 }
 346
 347 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 348 {
 349     BusChild *kid;
 350
 351     /*
 352      * try to match in order:
 353      *   (1) instance id, if present
 354      *   (2) driver name
 355      *   (3) driver alias, if present
 356      */
 357     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 358         DeviceState *dev = kid->child;
 359         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 360             return dev;
 361         }
 362     }
 363     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 364         DeviceState *dev = kid->child;
 365         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 366             return dev;
 367         }
 368     }
 369     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 370         DeviceState *dev = kid->child;
 371         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 372
 373         if (qdev_class_has_alias(dc) &&
 374             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 375             return dev;
 376         }
 377     }
 378     return NULL;
 379 }
 380
 381 static inline bool qbus_is_full(BusState *bus)
 382 {
 383     BusClass *bus_class = BUS_GET_CLASS(bus);
 384     return bus_class->max_dev && bus->max_index >= bus_class->max_dev;
 385 }
 386
 387 /*
 388  * Search the tree rooted at @bus for a bus.
 389  * If @name, search for a bus with that name.  Note that bus names
 390  * need not be unique.  Yes, that's screwed up.
 391  * Else search for a bus that is a subtype of @bus_typename.
 392  * If more than one exists, prefer one that can take another device.
 393  * Return the bus if found, else %NULL.
 394  */
 395 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 396                                      const char *bus_typename)
 397 {
 398     BusChild *kid;
 399     BusState *pick, *child, *ret;
 400     bool match;
 401
 402     assert(name || bus_typename);
 403     if (name) {
 404         match = !strcmp(bus->name, name);
 405     } else {
 406         match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
 407     }
 408
 409     if (match && !qbus_is_full(bus)) {
 410         return bus;             /* root matches and isn't full */
 411     }
 412
 413     pick = match ? bus : NULL;
 414
 415     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 416         DeviceState *dev = kid->child;
 417         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 418             ret = qbus_find_recursive(child, name, bus_typename);
 419             if (ret && !qbus_is_full(ret)) {
 420                 return ret;     /* a descendant matches and isn't full */
 421             }
 422             if (ret && !pick) {
 423                 pick = ret;
 424             }
 425         }
 426     }
 427
 428     /* root or a descendant matches, but is full */
 429     return pick;
 430 }
 431
 432 static BusState *qbus_find(const char *path, Error **errp)
 433 {
 434     DeviceState *dev;
 435     BusState *bus;
 436     char elem[128];
 437     int pos, len;
 438
 439     /* find start element */
 440     if (path[0] == '/') {
 441         bus = sysbus_get_default();
 442         pos = 0;
 443     } else {
 444         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 445             assert(!path[0]);
 446             elem[0] = len = 0;
 447         }
 448         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 449         if (!bus) {
 450             error_setg(errp, "Bus '%s' not found", elem);
 451             return NULL;
 452         }
 453         pos = len;
 454     }
 455
 456     for (;;) {
 457         assert(path[pos] == '/' || !path[pos]);
 458         while (path[pos] == '/') {
 459             pos++;
 460         }
 461         if (path[pos] == '\0') {
 462             break;
 463         }
 464
 465         /* find device */
 466         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 467             g_assert_not_reached();
 468             elem[0] = len = 0;
 469         }
 470         pos += len;
 471         dev = qbus_find_dev(bus, elem);
 472         if (!dev) {
 473             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 474                       "Device '%s' not found", elem);
 475             qbus_list_dev(bus, errp);
 476             return NULL;
 477         }
 478
 479         assert(path[pos] == '/' || !path[pos]);
 480         while (path[pos] == '/') {
 481             pos++;
 482         }
 483         if (path[pos] == '\0') {
 484             /* last specified element is a device.  If it has exactly
 485              * one child bus accept it nevertheless */
 486             if (dev->num_child_bus == 1) {
 487                 bus = QLIST_FIRST(&dev->child_bus);
 488                 break;
 489             }
 490             if (dev->num_child_bus) {
 491                 error_setg(errp, "Device '%s' has multiple child buses",
 492                            elem);
 493                 qbus_list_bus(dev, errp);
 494             } else {
 495                 error_setg(errp, "Device '%s' has no child bus", elem);
 496             }
 497             return NULL;
 498         }
 499
 500         /* find bus */
 501         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 502             g_assert_not_reached();
 503             elem[0] = len = 0;
 504         }
 505         pos += len;
 506         bus = qbus_find_bus(dev, elem);
 507         if (!bus) {
 508             error_setg(errp, "Bus '%s' not found", elem);
 509             qbus_list_bus(dev, errp);
 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
 788     if (id[0] == '/') {
 789         obj = object_resolve_path(id, NULL);
 790     } else {
 791         char *root_path = object_get_canonical_path(qdev_get_peripheral());
 792         char *path = g_strdup_printf("%s/%s", root_path, id);
 793
 794         g_free(root_path);
 795         obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 796         g_free(path);
 797     }
 798
 799     if (!obj) {
 800         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 801                   "Device '%s' not found", id);
 802         return;
 803     }
 804
 805     if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
 806         error_setg(errp, "%s is not a hotpluggable device", id);
 807         return;
 808     }
 809
 810     qdev_unplug(DEVICE(obj), errp);
 811 }
 812
 813 void qdev_machine_init(void)
 814 {
 815     qdev_get_peripheral_anon();
 816     qdev_get_peripheral();
 817 }
 818
 819 QemuOptsList qemu_device_opts = {
 820     .name = "device",
 821     .implied_opt_name = "driver",
 822     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 823     .desc = {
 824         /*
 825          * no elements => accept any
 826          * sanity checking will happen later
 827          * when setting device properties
 828          */
 829         { /* end of list */ }
 830     },
 831 };
 832
 833 QemuOptsList qemu_global_opts = {
 834     .name = "global",
 835     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 836     .desc = {
 837         {
 838             .name = "driver",
 839             .type = QEMU_OPT_STRING,
 840         },{
 841             .name = "property",
 842             .type = QEMU_OPT_STRING,
 843         },{
 844             .name = "value",
 845             .type = QEMU_OPT_STRING,
 846         },
 847         { /* end of list */ }
 848     },
 849 };
 850
 851 int qemu_global_option(const char *str)
 852 {
 853     char driver[64], property[64];
 854     QemuOpts *opts;
 855     int rc, offset;
 856
 857     rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
 858     if (rc == 2 && str[offset] == '=') {
 859         opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 860         qemu_opt_set(opts, "driver", driver, &error_abort);
 861         qemu_opt_set(opts, "property", property, &error_abort);
 862         qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
 863         return 0;
 864     }
 865
 866     opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
 867     if (!opts) {
 868         return -1;
 869     }
 870
 871     return 0;
 872 }