qdev-monitor.c

   1 /*
   2  *  Dynamic device configuration and creation.
   3  *
   4  *  Copyright (c) 2009 CodeSourcery
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "hw/qdev.h"
  21 #include "hw/sysbus.h"
  22 #include "monitor/monitor.h"
  23 #include "monitor/qdev.h"
  24 #include "qmp-commands.h"
  25 #include "sysemu/arch_init.h"
  26 #include "qapi/qmp/qerror.h"
  27 #include "qemu/config-file.h"
  28 #include "qemu/error-report.h"
  29
  30 /*
  31  * Aliases were a bad idea from the start.  Let's keep them
  32  * from spreading further.
  33  */
  34 typedef struct QDevAlias
  35 {
  36     const char *typename;
  37     const char *alias;
  38     uint32_t arch_mask;
  39 } QDevAlias;
  40
  41 static const QDevAlias qdev_alias_table[] = {
  42     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  43     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  44     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  45     { "virtio-balloon-pci", "virtio-balloon",
  46             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  47     { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
  48     { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
  49     { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
  50     { "lsi53c895a", "lsi" },
  51     { "ich9-ahci", "ahci" },
  52     { "kvm-pci-assign", "pci-assign" },
  53     { "e1000", "e1000-82540em" },
  54     { }
  55 };
  56
  57 static const char *qdev_class_get_alias(DeviceClass *dc)
  58 {
  59     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  60     int i;
  61
  62     for (i = 0; qdev_alias_table[i].typename; i++) {
  63         if (qdev_alias_table[i].arch_mask &&
  64             !(qdev_alias_table[i].arch_mask & arch_type)) {
  65             continue;
  66         }
  67
  68         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
  69             return qdev_alias_table[i].alias;
  70         }
  71     }
  72
  73     return NULL;
  74 }
  75
  76 static bool qdev_class_has_alias(DeviceClass *dc)
  77 {
  78     return (qdev_class_get_alias(dc) != NULL);
  79 }
  80
  81 static void qdev_print_devinfo(DeviceClass *dc)
  82 {
  83     error_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
  84     if (dc->bus_type) {
  85         error_printf(", bus %s", dc->bus_type);
  86     }
  87     if (qdev_class_has_alias(dc)) {
  88         error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
  89     }
  90     if (dc->desc) {
  91         error_printf(", desc \"%s\"", dc->desc);
  92     }
  93     if (dc->cannot_instantiate_with_device_add_yet) {
  94         error_printf(", no-user");
  95     }
  96     error_printf("\n");
  97 }
  98
  99 static gint devinfo_cmp(gconstpointer a, gconstpointer b)
 100 {
 101     return strcasecmp(object_class_get_name((ObjectClass *)a),
 102                       object_class_get_name((ObjectClass *)b));
 103 }
 104
 105 static void qdev_print_devinfos(bool show_no_user)
 106 {
 107     static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
 108         [DEVICE_CATEGORY_BRIDGE]  = "Controller/Bridge/Hub",
 109         [DEVICE_CATEGORY_USB]     = "USB",
 110         [DEVICE_CATEGORY_STORAGE] = "Storage",
 111         [DEVICE_CATEGORY_NETWORK] = "Network",
 112         [DEVICE_CATEGORY_INPUT]   = "Input",
 113         [DEVICE_CATEGORY_DISPLAY] = "Display",
 114         [DEVICE_CATEGORY_SOUND]   = "Sound",
 115         [DEVICE_CATEGORY_MISC]    = "Misc",
 116         [DEVICE_CATEGORY_MAX]     = "Uncategorized",
 117     };
 118     GSList *list, *elt;
 119     int i;
 120     bool cat_printed;
 121
 122     list = g_slist_sort(object_class_get_list(TYPE_DEVICE, false),
 123                         devinfo_cmp);
 124
 125     for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
 126         cat_printed = false;
 127         for (elt = list; elt; elt = elt->next) {
 128             DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
 129                                                  TYPE_DEVICE);
 130             if ((i < DEVICE_CATEGORY_MAX
 131                  ? !test_bit(i, dc->categories)
 132                  : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
 133                 || (!show_no_user
 134                     && dc->cannot_instantiate_with_device_add_yet)) {
 135                 continue;
 136             }
 137             if (!cat_printed) {
 138                 error_printf("%s%s devices:\n", i ? "\n" : "",
 139                              cat_name[i]);
 140                 cat_printed = true;
 141             }
 142             qdev_print_devinfo(dc);
 143         }
 144     }
 145
 146     g_slist_free(list);
 147 }
 148
 149 static int set_property(void *opaque, const char *name, const char *value,
 150                         Error **errp)
 151 {
 152     Object *obj = opaque;
 153     Error *err = NULL;
 154
 155     if (strcmp(name, "driver") == 0)
 156         return 0;
 157     if (strcmp(name, "bus") == 0)
 158         return 0;
 159
 160     object_property_parse(obj, value, name, &err);
 161     if (err != NULL) {
 162         error_propagate(errp, err);
 163         return -1;
 164     }
 165     return 0;
 166 }
 167
 168 static const char *find_typename_by_alias(const char *alias)
 169 {
 170     int i;
 171
 172     for (i = 0; qdev_alias_table[i].alias; i++) {
 173         if (qdev_alias_table[i].arch_mask &&
 174             !(qdev_alias_table[i].arch_mask & arch_type)) {
 175             continue;
 176         }
 177
 178         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 179             return qdev_alias_table[i].typename;
 180         }
 181     }
 182
 183     return NULL;
 184 }
 185
 186 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
 187 {
 188     ObjectClass *oc;
 189     DeviceClass *dc;
 190
 191     oc = object_class_by_name(*driver);
 192     if (!oc) {
 193         const char *typename = find_typename_by_alias(*driver);
 194
 195         if (typename) {
 196             *driver = typename;
 197             oc = object_class_by_name(*driver);
 198         }
 199     }
 200
 201     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 202         error_setg(errp, "'%s' is not a valid device model name", *driver);
 203         return NULL;
 204     }
 205
 206     if (object_class_is_abstract(oc)) {
 207         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 208                    "non-abstract device type");
 209         return NULL;
 210     }
 211
 212     dc = DEVICE_CLASS(oc);
 213     if (dc->cannot_instantiate_with_device_add_yet ||
 214         (qdev_hotplug && !dc->hotpluggable)) {
 215         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 216                    "pluggable device type");
 217         return NULL;
 218     }
 219
 220     return dc;
 221 }
 222
 223
 224 int qdev_device_help(QemuOpts *opts)
 225 {
 226     Error *local_err = NULL;
 227     const char *driver;
 228     DevicePropertyInfoList *prop_list;
 229     DevicePropertyInfoList *prop;
 230
 231     driver = qemu_opt_get(opts, "driver");
 232     if (driver && is_help_option(driver)) {
 233         qdev_print_devinfos(false);
 234         return 1;
 235     }
 236
 237     if (!driver || !qemu_opt_has_help_opt(opts)) {
 238         return 0;
 239     }
 240
 241     qdev_get_device_class(&driver, &local_err);
 242     if (local_err) {
 243         goto error;
 244     }
 245
 246     prop_list = qmp_device_list_properties(driver, &local_err);
 247     if (local_err) {
 248         goto error;
 249     }
 250
 251     for (prop = prop_list; prop; prop = prop->next) {
 252         error_printf("%s.%s=%s", driver,
 253                      prop->value->name,
 254                      prop->value->type);
 255         if (prop->value->has_description) {
 256             error_printf(" (%s)\n", prop->value->description);
 257         } else {
 258             error_printf("\n");
 259         }
 260     }
 261
 262     qapi_free_DevicePropertyInfoList(prop_list);
 263     return 1;
 264
 265 error:
 266     error_printf("%s\n", error_get_pretty(local_err));
 267     error_free(local_err);
 268     return 1;
 269 }
 270
 271 static Object *qdev_get_peripheral(void)
 272 {
 273     static Object *dev;
 274
 275     if (dev == NULL) {
 276         dev = container_get(qdev_get_machine(), "/peripheral");
 277     }
 278
 279     return dev;
 280 }
 281
 282 static Object *qdev_get_peripheral_anon(void)
 283 {
 284     static Object *dev;
 285
 286     if (dev == NULL) {
 287         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 288     }
 289
 290     return dev;
 291 }
 292
 293 static void qbus_list_bus(DeviceState *dev, Error **errp)
 294 {
 295     BusState *child;
 296     const char *sep = " ";
 297
 298     error_append_hint(errp, "child buses at \"%s\":",
 299                       dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 300     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 301         error_append_hint(errp, "%s\"%s\"", sep, child->name);
 302         sep = ", ";
 303     }
 304 }
 305
 306 static void qbus_list_dev(BusState *bus, Error **errp)
 307 {
 308     BusChild *kid;
 309     const char *sep = " ";
 310
 311     error_append_hint(errp, "devices at \"%s\":", bus->name);
 312     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 313         DeviceState *dev = kid->child;
 314         error_append_hint(errp, "%s\"%s\"", sep,
 315                           object_get_typename(OBJECT(dev)));
 316         if (dev->id) {
 317             error_append_hint(errp, "/\"%s\"", dev->id);
 318         }
 319         sep = ", ";
 320     }
 321 }
 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             qbus_list_dev(bus, errp);
 464             return NULL;
 465         }
 466
 467         assert(path[pos] == '/' || !path[pos]);
 468         while (path[pos] == '/') {
 469             pos++;
 470         }
 471         if (path[pos] == '\0') {
 472             /* last specified element is a device.  If it has exactly
 473              * one child bus accept it nevertheless */
 474             if (dev->num_child_bus == 1) {
 475                 bus = QLIST_FIRST(&dev->child_bus);
 476                 break;
 477             }
 478             if (dev->num_child_bus) {
 479                 error_setg(errp, "Device '%s' has multiple child buses",
 480                            elem);
 481                 qbus_list_bus(dev, errp);
 482             } else {
 483                 error_setg(errp, "Device '%s' has no child bus", elem);
 484             }
 485             return NULL;
 486         }
 487
 488         /* find bus */
 489         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 490             g_assert_not_reached();
 491             elem[0] = len = 0;
 492         }
 493         pos += len;
 494         bus = qbus_find_bus(dev, elem);
 495         if (!bus) {
 496             error_setg(errp, "Bus '%s' not found", elem);
 497             qbus_list_bus(dev, errp);
 498             return NULL;
 499         }
 500     }
 501
 502     if (qbus_is_full(bus)) {
 503         error_setg(errp, "Bus '%s' is full", path);
 504         return NULL;
 505     }
 506     return bus;
 507 }
 508
 509 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 510 {
 511     DeviceClass *dc;
 512     const char *driver, *path, *id;
 513     DeviceState *dev;
 514     BusState *bus = NULL;
 515     Error *err = NULL;
 516
 517     driver = qemu_opt_get(opts, "driver");
 518     if (!driver) {
 519         error_setg(errp, QERR_MISSING_PARAMETER, "driver");
 520         return NULL;
 521     }
 522
 523     /* find driver */
 524     dc = qdev_get_device_class(&driver, errp);
 525     if (!dc) {
 526         return NULL;
 527     }
 528
 529     /* find bus */
 530     path = qemu_opt_get(opts, "bus");
 531     if (path != NULL) {
 532         bus = qbus_find(path, errp);
 533         if (!bus) {
 534             return NULL;
 535         }
 536         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 537             error_setg(errp, "Device '%s' can't go on %s bus",
 538                        driver, object_get_typename(OBJECT(bus)));
 539             return NULL;
 540         }
 541     } else if (dc->bus_type != NULL) {
 542         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 543         if (!bus || qbus_is_full(bus)) {
 544             error_setg(errp, "No '%s' bus found for device '%s'",
 545                        dc->bus_type, driver);
 546             return NULL;
 547         }
 548     }
 549     if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
 550         error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
 551         return NULL;
 552     }
 553
 554     /* create device */
 555     dev = DEVICE(object_new(driver));
 556
 557     if (bus) {
 558         qdev_set_parent_bus(dev, bus);
 559     }
 560
 561     id = qemu_opts_id(opts);
 562     if (id) {
 563         dev->id = id;
 564     }
 565
 566     if (dev->id) {
 567         object_property_add_child(qdev_get_peripheral(), dev->id,
 568                                   OBJECT(dev), NULL);
 569     } else {
 570         static int anon_count;
 571         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 572         object_property_add_child(qdev_get_peripheral_anon(), name,
 573                                   OBJECT(dev), NULL);
 574         g_free(name);
 575     }
 576
 577     /* set properties */
 578     if (qemu_opt_foreach(opts, set_property, dev, &err)) {
 579         error_propagate(errp, err);
 580         object_unparent(OBJECT(dev));
 581         object_unref(OBJECT(dev));
 582         return NULL;
 583     }
 584
 585     dev->opts = opts;
 586     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 587     if (err != NULL) {
 588         error_propagate(errp, err);
 589         dev->opts = NULL;
 590         object_unparent(OBJECT(dev));
 591         object_unref(OBJECT(dev));
 592         return NULL;
 593     }
 594     return dev;
 595 }
 596
 597
 598 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 599 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 600
 601 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 602                              int indent)
 603 {
 604     if (!props)
 605         return;
 606     for (; props->name; props++) {
 607         Error *err = NULL;
 608         char *value;
 609         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 610         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 611             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 612         } else {
 613             value = object_property_print(OBJECT(dev), props->name, true, &err);
 614         }
 615         g_free(legacy_name);
 616
 617         if (err) {
 618             error_free(err);
 619             continue;
 620         }
 621         qdev_printf("%s = %s\n", props->name,
 622                     value && *value ? value : "<null>");
 623         g_free(value);
 624     }
 625 }
 626
 627 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 628 {
 629     BusClass *bc = BUS_GET_CLASS(bus);
 630
 631     if (bc->print_dev) {
 632         bc->print_dev(mon, dev, indent);
 633     }
 634 }
 635
 636 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 637 {
 638     ObjectClass *class;
 639     BusState *child;
 640     NamedGPIOList *ngl;
 641
 642     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 643                 dev->id ? dev->id : "");
 644     indent += 2;
 645     QLIST_FOREACH(ngl, &dev->gpios, node) {
 646         if (ngl->num_in) {
 647             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 648                         ngl->num_in);
 649         }
 650         if (ngl->num_out) {
 651             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 652                         ngl->num_out);
 653         }
 654     }
 655     class = object_get_class(OBJECT(dev));
 656     do {
 657         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 658         class = object_class_get_parent(class);
 659     } while (class != object_class_by_name(TYPE_DEVICE));
 660     bus_print_dev(dev->parent_bus, mon, dev, indent);
 661     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 662         qbus_print(mon, child, indent);
 663     }
 664 }
 665
 666 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 667 {
 668     BusChild *kid;
 669
 670     qdev_printf("bus: %s\n", bus->name);
 671     indent += 2;
 672     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 673     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 674         DeviceState *dev = kid->child;
 675         qdev_print(mon, dev, indent);
 676     }
 677 }
 678 #undef qdev_printf
 679
 680 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
 681 {
 682     if (sysbus_get_default())
 683         qbus_print(mon, sysbus_get_default(), 0);
 684 }
 685
 686 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
 687 {
 688     qdev_print_devinfos(true);
 689 }
 690
 691 typedef struct QOMCompositionState {
 692     Monitor *mon;
 693     int indent;
 694 } QOMCompositionState;
 695
 696 static void print_qom_composition(Monitor *mon, Object *obj, int indent);
 697
 698 static int print_qom_composition_child(Object *obj, void *opaque)
 699 {
 700     QOMCompositionState *s = opaque;
 701
 702     print_qom_composition(s->mon, obj, s->indent);
 703
 704     return 0;
 705 }
 706
 707 static void print_qom_composition(Monitor *mon, Object *obj, int indent)
 708 {
 709     QOMCompositionState s = {
 710         .mon = mon,
 711         .indent = indent + 2,
 712     };
 713     char *name;
 714
 715     if (obj == object_get_root()) {
 716         name = g_strdup("");
 717     } else {
 718         name = object_get_canonical_path_component(obj);
 719     }
 720     monitor_printf(mon, "%*s/%s (%s)\n", indent, "", name,
 721                    object_get_typename(obj));
 722     g_free(name);
 723     object_child_foreach(obj, print_qom_composition_child, &s);
 724 }
 725
 726 void hmp_info_qom_tree(Monitor *mon, const QDict *dict)
 727 {
 728     const char *path = qdict_get_try_str(dict, "path");
 729     Object *obj;
 730     bool ambiguous = false;
 731
 732     if (path) {
 733         obj = object_resolve_path(path, &ambiguous);
 734         if (!obj) {
 735             monitor_printf(mon, "Path '%s' could not be resolved.\n", path);
 736             return;
 737         }
 738         if (ambiguous) {
 739             monitor_printf(mon, "Warning: Path '%s' is ambiguous.\n", path);
 740             return;
 741         }
 742     } else {
 743         obj = qdev_get_machine();
 744     }
 745     print_qom_composition(mon, obj, 0);
 746 }
 747
 748 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
 749 {
 750     Error *local_err = NULL;
 751     QemuOpts *opts;
 752     DeviceState *dev;
 753
 754     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 755     if (local_err) {
 756         error_propagate(errp, local_err);
 757         return;
 758     }
 759     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 760         qemu_opts_del(opts);
 761         return;
 762     }
 763     dev = qdev_device_add(opts, &local_err);
 764     if (!dev) {
 765         error_propagate(errp, local_err);
 766         qemu_opts_del(opts);
 767         return;
 768     }
 769     object_unref(OBJECT(dev));
 770 }
 771
 772 void qmp_device_del(const char *id, Error **errp)
 773 {
 774     Object *obj;
 775
 776     if (id[0] == '/') {
 777         obj = object_resolve_path(id, NULL);
 778     } else {
 779         char *root_path = object_get_canonical_path(qdev_get_peripheral());
 780         char *path = g_strdup_printf("%s/%s", root_path, id);
 781
 782         g_free(root_path);
 783         obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 784         g_free(path);
 785     }
 786
 787     if (!obj) {
 788         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 789                   "Device '%s' not found", id);
 790         return;
 791     }
 792
 793     if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
 794         error_setg(errp, "%s is not a hotpluggable device", id);
 795         return;
 796     }
 797
 798     qdev_unplug(DEVICE(obj), errp);
 799 }
 800
 801 void qdev_machine_init(void)
 802 {
 803     qdev_get_peripheral_anon();
 804     qdev_get_peripheral();
 805 }
 806
 807 QemuOptsList qemu_device_opts = {
 808     .name = "device",
 809     .implied_opt_name = "driver",
 810     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 811     .desc = {
 812         /*
 813          * no elements => accept any
 814          * sanity checking will happen later
 815          * when setting device properties
 816          */
 817         { /* end of list */ }
 818     },
 819 };
 820
 821 QemuOptsList qemu_global_opts = {
 822     .name = "global",
 823     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 824     .desc = {
 825         {
 826             .name = "driver",
 827             .type = QEMU_OPT_STRING,
 828         },{
 829             .name = "property",
 830             .type = QEMU_OPT_STRING,
 831         },{
 832             .name = "value",
 833             .type = QEMU_OPT_STRING,
 834         },
 835         { /* end of list */ }
 836     },
 837 };
 838
 839 int qemu_global_option(const char *str)
 840 {
 841     char driver[64], property[64];
 842     QemuOpts *opts;
 843     int rc, offset;
 844
 845     rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
 846     if (rc == 2 && str[offset] == '=') {
 847         opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 848         qemu_opt_set(opts, "driver", driver, &error_abort);
 849         qemu_opt_set(opts, "property", property, &error_abort);
 850         qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
 851         return 0;
 852     }
 853
 854     opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
 855     if (!opts) {
 856         return -1;
 857     }
 858
 859     return 0;
 860 }