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