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 #include "qemu/help_option.h"
  31 #include "sysemu/block-backend.h"
  32
  33 /*
  34  * Aliases were a bad idea from the start.  Let's keep them
  35  * from spreading further.
  36  */
  37 typedef struct QDevAlias
  38 {
  39     const char *typename;
  40     const char *alias;
  41     uint32_t arch_mask;
  42 } QDevAlias;
  43
  44 /* Please keep this table sorted by typename. */
  45 static const QDevAlias qdev_alias_table[] = {
  46     { "e1000", "e1000-82540em" },
  47     { "ich9-ahci", "ahci" },
  48     { "kvm-pci-assign", "pci-assign" },
  49     { "lsi53c895a", "lsi" },
  50     { "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_S390X },
  51     { "virtio-9p-pci", "virtio-9p", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  52     { "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_S390X },
  53     { "virtio-balloon-pci", "virtio-balloon",
  54             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  55     { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
  56     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  57     { "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_S390X },
  58     { "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  59     { "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_S390X },
  60     { "virtio-input-host-pci", "virtio-input-host",
  61             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  62     { "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_S390X },
  63     { "virtio-keyboard-pci", "virtio-keyboard",
  64             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  65     { "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_S390X },
  66     { "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  67     { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
  68     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  69     { "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_S390X },
  70     { "virtio-rng-pci", "virtio-rng", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  71     { "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_S390X },
  72     { "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  73     { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
  74     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  75     { "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_S390X },
  76     { "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  77     { }
  78 };
  79
  80 static const char *qdev_class_get_alias(DeviceClass *dc)
  81 {
  82     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  83     int i;
  84
  85     for (i = 0; qdev_alias_table[i].typename; i++) {
  86         if (qdev_alias_table[i].arch_mask &&
  87             !(qdev_alias_table[i].arch_mask & arch_type)) {
  88             continue;
  89         }
  90
  91         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
  92             return qdev_alias_table[i].alias;
  93         }
  94     }
  95
  96     return NULL;
  97 }
  98
  99 static bool qdev_class_has_alias(DeviceClass *dc)
 100 {
 101     return (qdev_class_get_alias(dc) != NULL);
 102 }
 103
 104 static void qdev_print_devinfo(DeviceClass *dc)
 105 {
 106     error_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
 107     if (dc->bus_type) {
 108         error_printf(", bus %s", dc->bus_type);
 109     }
 110     if (qdev_class_has_alias(dc)) {
 111         error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
 112     }
 113     if (dc->desc) {
 114         error_printf(", desc \"%s\"", dc->desc);
 115     }
 116     if (dc->cannot_instantiate_with_device_add_yet) {
 117         error_printf(", no-user");
 118     }
 119     error_printf("\n");
 120 }
 121
 122 static gint devinfo_cmp(gconstpointer a, gconstpointer b)
 123 {
 124     return strcasecmp(object_class_get_name((ObjectClass *)a),
 125                       object_class_get_name((ObjectClass *)b));
 126 }
 127
 128 static void qdev_print_devinfos(bool show_no_user)
 129 {
 130     static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
 131         [DEVICE_CATEGORY_BRIDGE]  = "Controller/Bridge/Hub",
 132         [DEVICE_CATEGORY_USB]     = "USB",
 133         [DEVICE_CATEGORY_STORAGE] = "Storage",
 134         [DEVICE_CATEGORY_NETWORK] = "Network",
 135         [DEVICE_CATEGORY_INPUT]   = "Input",
 136         [DEVICE_CATEGORY_DISPLAY] = "Display",
 137         [DEVICE_CATEGORY_SOUND]   = "Sound",
 138         [DEVICE_CATEGORY_MISC]    = "Misc",
 139         [DEVICE_CATEGORY_MAX]     = "Uncategorized",
 140     };
 141     GSList *list, *elt;
 142     int i;
 143     bool cat_printed;
 144
 145     list = g_slist_sort(object_class_get_list(TYPE_DEVICE, false),
 146                         devinfo_cmp);
 147
 148     for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
 149         cat_printed = false;
 150         for (elt = list; elt; elt = elt->next) {
 151             DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
 152                                                  TYPE_DEVICE);
 153             if ((i < DEVICE_CATEGORY_MAX
 154                  ? !test_bit(i, dc->categories)
 155                  : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
 156                 || (!show_no_user
 157                     && dc->cannot_instantiate_with_device_add_yet)) {
 158                 continue;
 159             }
 160             if (!cat_printed) {
 161                 error_printf("%s%s devices:\n", i ? "\n" : "",
 162                              cat_name[i]);
 163                 cat_printed = true;
 164             }
 165             qdev_print_devinfo(dc);
 166         }
 167     }
 168
 169     g_slist_free(list);
 170 }
 171
 172 static int set_property(void *opaque, const char *name, const char *value,
 173                         Error **errp)
 174 {
 175     Object *obj = opaque;
 176     Error *err = NULL;
 177
 178     if (strcmp(name, "driver") == 0)
 179         return 0;
 180     if (strcmp(name, "bus") == 0)
 181         return 0;
 182
 183     object_property_parse(obj, value, name, &err);
 184     if (err != NULL) {
 185         error_propagate(errp, err);
 186         return -1;
 187     }
 188     return 0;
 189 }
 190
 191 static const char *find_typename_by_alias(const char *alias)
 192 {
 193     int i;
 194
 195     for (i = 0; qdev_alias_table[i].alias; i++) {
 196         if (qdev_alias_table[i].arch_mask &&
 197             !(qdev_alias_table[i].arch_mask & arch_type)) {
 198             continue;
 199         }
 200
 201         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 202             return qdev_alias_table[i].typename;
 203         }
 204     }
 205
 206     return NULL;
 207 }
 208
 209 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
 210 {
 211     ObjectClass *oc;
 212     DeviceClass *dc;
 213     const char *original_name = *driver;
 214
 215     oc = object_class_by_name(*driver);
 216     if (!oc) {
 217         const char *typename = find_typename_by_alias(*driver);
 218
 219         if (typename) {
 220             *driver = typename;
 221             oc = object_class_by_name(*driver);
 222         }
 223     }
 224
 225     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 226         if (*driver != original_name) {
 227             error_setg(errp, "'%s' (alias '%s') is not a valid device model"
 228                        " name", original_name, *driver);
 229         } else {
 230             error_setg(errp, "'%s' is not a valid device model name", *driver);
 231         }
 232         return NULL;
 233     }
 234
 235     if (object_class_is_abstract(oc)) {
 236         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 237                    "non-abstract device type");
 238         return NULL;
 239     }
 240
 241     dc = DEVICE_CLASS(oc);
 242     if (dc->cannot_instantiate_with_device_add_yet ||
 243         (qdev_hotplug && !dc->hotpluggable)) {
 244         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 245                    "pluggable device type");
 246         return NULL;
 247     }
 248
 249     return dc;
 250 }
 251
 252
 253 int qdev_device_help(QemuOpts *opts)
 254 {
 255     Error *local_err = NULL;
 256     const char *driver;
 257     DevicePropertyInfoList *prop_list;
 258     DevicePropertyInfoList *prop;
 259
 260     driver = qemu_opt_get(opts, "driver");
 261     if (driver && is_help_option(driver)) {
 262         qdev_print_devinfos(false);
 263         return 1;
 264     }
 265
 266     if (!driver || !qemu_opt_has_help_opt(opts)) {
 267         return 0;
 268     }
 269
 270     if (!object_class_by_name(driver)) {
 271         const char *typename = find_typename_by_alias(driver);
 272
 273         if (typename) {
 274             driver = typename;
 275         }
 276     }
 277
 278     prop_list = qmp_device_list_properties(driver, &local_err);
 279     if (local_err) {
 280         goto error;
 281     }
 282
 283     for (prop = prop_list; prop; prop = prop->next) {
 284         error_printf("%s.%s=%s", driver,
 285                      prop->value->name,
 286                      prop->value->type);
 287         if (prop->value->has_description) {
 288             error_printf(" (%s)\n", prop->value->description);
 289         } else {
 290             error_printf("\n");
 291         }
 292     }
 293
 294     qapi_free_DevicePropertyInfoList(prop_list);
 295     return 1;
 296
 297 error:
 298     error_report_err(local_err);
 299     return 1;
 300 }
 301
 302 static Object *qdev_get_peripheral(void)
 303 {
 304     static Object *dev;
 305
 306     if (dev == NULL) {
 307         dev = container_get(qdev_get_machine(), "/peripheral");
 308     }
 309
 310     return dev;
 311 }
 312
 313 static Object *qdev_get_peripheral_anon(void)
 314 {
 315     static Object *dev;
 316
 317     if (dev == NULL) {
 318         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 319     }
 320
 321     return dev;
 322 }
 323
 324 static void qbus_list_bus(DeviceState *dev, Error **errp)
 325 {
 326     BusState *child;
 327     const char *sep = " ";
 328
 329     error_append_hint(errp, "child buses at \"%s\":",
 330                       dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 331     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 332         error_append_hint(errp, "%s\"%s\"", sep, child->name);
 333         sep = ", ";
 334     }
 335     error_append_hint(errp, "\n");
 336 }
 337
 338 static void qbus_list_dev(BusState *bus, Error **errp)
 339 {
 340     BusChild *kid;
 341     const char *sep = " ";
 342
 343     error_append_hint(errp, "devices at \"%s\":", bus->name);
 344     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 345         DeviceState *dev = kid->child;
 346         error_append_hint(errp, "%s\"%s\"", sep,
 347                           object_get_typename(OBJECT(dev)));
 348         if (dev->id) {
 349             error_append_hint(errp, "/\"%s\"", dev->id);
 350         }
 351         sep = ", ";
 352     }
 353     error_append_hint(errp, "\n");
 354 }
 355
 356 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 357 {
 358     BusState *child;
 359
 360     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 361         if (strcmp(child->name, elem) == 0) {
 362             return child;
 363         }
 364     }
 365     return NULL;
 366 }
 367
 368 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 369 {
 370     BusChild *kid;
 371
 372     /*
 373      * try to match in order:
 374      *   (1) instance id, if present
 375      *   (2) driver name
 376      *   (3) driver alias, if present
 377      */
 378     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 379         DeviceState *dev = kid->child;
 380         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 381             return dev;
 382         }
 383     }
 384     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 385         DeviceState *dev = kid->child;
 386         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 387             return dev;
 388         }
 389     }
 390     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 391         DeviceState *dev = kid->child;
 392         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 393
 394         if (qdev_class_has_alias(dc) &&
 395             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 396             return dev;
 397         }
 398     }
 399     return NULL;
 400 }
 401
 402 static inline bool qbus_is_full(BusState *bus)
 403 {
 404     BusClass *bus_class = BUS_GET_CLASS(bus);
 405     return bus_class->max_dev && bus->max_index >= bus_class->max_dev;
 406 }
 407
 408 /*
 409  * Search the tree rooted at @bus for a bus.
 410  * If @name, search for a bus with that name.  Note that bus names
 411  * need not be unique.  Yes, that's screwed up.
 412  * Else search for a bus that is a subtype of @bus_typename.
 413  * If more than one exists, prefer one that can take another device.
 414  * Return the bus if found, else %NULL.
 415  */
 416 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 417                                      const char *bus_typename)
 418 {
 419     BusChild *kid;
 420     BusState *pick, *child, *ret;
 421     bool match;
 422
 423     assert(name || bus_typename);
 424     if (name) {
 425         match = !strcmp(bus->name, name);
 426     } else {
 427         match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
 428     }
 429
 430     if (match && !qbus_is_full(bus)) {
 431         return bus;             /* root matches and isn't full */
 432     }
 433
 434     pick = match ? bus : NULL;
 435
 436     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 437         DeviceState *dev = kid->child;
 438         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 439             ret = qbus_find_recursive(child, name, bus_typename);
 440             if (ret && !qbus_is_full(ret)) {
 441                 return ret;     /* a descendant matches and isn't full */
 442             }
 443             if (ret && !pick) {
 444                 pick = ret;
 445             }
 446         }
 447     }
 448
 449     /* root or a descendant matches, but is full */
 450     return pick;
 451 }
 452
 453 static BusState *qbus_find(const char *path, Error **errp)
 454 {
 455     DeviceState *dev;
 456     BusState *bus;
 457     char elem[128];
 458     int pos, len;
 459
 460     /* find start element */
 461     if (path[0] == '/') {
 462         bus = sysbus_get_default();
 463         pos = 0;
 464     } else {
 465         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 466             assert(!path[0]);
 467             elem[0] = len = 0;
 468         }
 469         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 470         if (!bus) {
 471             error_setg(errp, "Bus '%s' not found", elem);
 472             return NULL;
 473         }
 474         pos = len;
 475     }
 476
 477     for (;;) {
 478         assert(path[pos] == '/' || !path[pos]);
 479         while (path[pos] == '/') {
 480             pos++;
 481         }
 482         if (path[pos] == '\0') {
 483             break;
 484         }
 485
 486         /* find device */
 487         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 488             g_assert_not_reached();
 489             elem[0] = len = 0;
 490         }
 491         pos += len;
 492         dev = qbus_find_dev(bus, elem);
 493         if (!dev) {
 494             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 495                       "Device '%s' not found", elem);
 496             qbus_list_dev(bus, errp);
 497             return NULL;
 498         }
 499
 500         assert(path[pos] == '/' || !path[pos]);
 501         while (path[pos] == '/') {
 502             pos++;
 503         }
 504         if (path[pos] == '\0') {
 505             /* last specified element is a device.  If it has exactly
 506              * one child bus accept it nevertheless */
 507             if (dev->num_child_bus == 1) {
 508                 bus = QLIST_FIRST(&dev->child_bus);
 509                 break;
 510             }
 511             if (dev->num_child_bus) {
 512                 error_setg(errp, "Device '%s' has multiple child buses",
 513                            elem);
 514                 qbus_list_bus(dev, errp);
 515             } else {
 516                 error_setg(errp, "Device '%s' has no child bus", elem);
 517             }
 518             return NULL;
 519         }
 520
 521         /* find bus */
 522         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 523             g_assert_not_reached();
 524             elem[0] = len = 0;
 525         }
 526         pos += len;
 527         bus = qbus_find_bus(dev, elem);
 528         if (!bus) {
 529             error_setg(errp, "Bus '%s' not found", elem);
 530             qbus_list_bus(dev, errp);
 531             return NULL;
 532         }
 533     }
 534
 535     if (qbus_is_full(bus)) {
 536         error_setg(errp, "Bus '%s' is full", path);
 537         return NULL;
 538     }
 539     return bus;
 540 }
 541
 542 void qdev_set_id(DeviceState *dev, const char *id)
 543 {
 544     if (id) {
 545         dev->id = id;
 546     }
 547
 548     if (dev->id) {
 549         object_property_add_child(qdev_get_peripheral(), dev->id,
 550                                   OBJECT(dev), NULL);
 551     } else {
 552         static int anon_count;
 553         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 554         object_property_add_child(qdev_get_peripheral_anon(), name,
 555                                   OBJECT(dev), NULL);
 556         g_free(name);
 557     }
 558 }
 559
 560 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 561 {
 562     DeviceClass *dc;
 563     const char *driver, *path;
 564     DeviceState *dev;
 565     BusState *bus = NULL;
 566     Error *err = NULL;
 567
 568     driver = qemu_opt_get(opts, "driver");
 569     if (!driver) {
 570         error_setg(errp, QERR_MISSING_PARAMETER, "driver");
 571         return NULL;
 572     }
 573
 574     /* find driver */
 575     dc = qdev_get_device_class(&driver, errp);
 576     if (!dc) {
 577         return NULL;
 578     }
 579
 580     /* find bus */
 581     path = qemu_opt_get(opts, "bus");
 582     if (path != NULL) {
 583         bus = qbus_find(path, errp);
 584         if (!bus) {
 585             return NULL;
 586         }
 587         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 588             error_setg(errp, "Device '%s' can't go on %s bus",
 589                        driver, object_get_typename(OBJECT(bus)));
 590             return NULL;
 591         }
 592     } else if (dc->bus_type != NULL) {
 593         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 594         if (!bus || qbus_is_full(bus)) {
 595             error_setg(errp, "No '%s' bus found for device '%s'",
 596                        dc->bus_type, driver);
 597             return NULL;
 598         }
 599     }
 600     if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
 601         error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
 602         return NULL;
 603     }
 604
 605     /* create device */
 606     dev = DEVICE(object_new(driver));
 607
 608     if (bus) {
 609         qdev_set_parent_bus(dev, bus);
 610     }
 611
 612     qdev_set_id(dev, qemu_opts_id(opts));
 613
 614     /* set properties */
 615     if (qemu_opt_foreach(opts, set_property, dev, &err)) {
 616         error_propagate(errp, err);
 617         object_unparent(OBJECT(dev));
 618         object_unref(OBJECT(dev));
 619         return NULL;
 620     }
 621
 622     dev->opts = opts;
 623     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 624     if (err != NULL) {
 625         error_propagate(errp, err);
 626         dev->opts = NULL;
 627         object_unparent(OBJECT(dev));
 628         object_unref(OBJECT(dev));
 629         return NULL;
 630     }
 631     return dev;
 632 }
 633
 634
 635 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 636 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 637
 638 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 639                              int indent)
 640 {
 641     if (!props)
 642         return;
 643     for (; props->name; props++) {
 644         Error *err = NULL;
 645         char *value;
 646         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 647         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 648             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 649         } else {
 650             value = object_property_print(OBJECT(dev), props->name, true, &err);
 651         }
 652         g_free(legacy_name);
 653
 654         if (err) {
 655             error_free(err);
 656             continue;
 657         }
 658         qdev_printf("%s = %s\n", props->name,
 659                     value && *value ? value : "<null>");
 660         g_free(value);
 661     }
 662 }
 663
 664 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 665 {
 666     BusClass *bc = BUS_GET_CLASS(bus);
 667
 668     if (bc->print_dev) {
 669         bc->print_dev(mon, dev, indent);
 670     }
 671 }
 672
 673 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 674 {
 675     ObjectClass *class;
 676     BusState *child;
 677     NamedGPIOList *ngl;
 678
 679     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 680                 dev->id ? dev->id : "");
 681     indent += 2;
 682     QLIST_FOREACH(ngl, &dev->gpios, node) {
 683         if (ngl->num_in) {
 684             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 685                         ngl->num_in);
 686         }
 687         if (ngl->num_out) {
 688             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 689                         ngl->num_out);
 690         }
 691     }
 692     class = object_get_class(OBJECT(dev));
 693     do {
 694         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 695         class = object_class_get_parent(class);
 696     } while (class != object_class_by_name(TYPE_DEVICE));
 697     bus_print_dev(dev->parent_bus, mon, dev, indent);
 698     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 699         qbus_print(mon, child, indent);
 700     }
 701 }
 702
 703 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 704 {
 705     BusChild *kid;
 706
 707     qdev_printf("bus: %s\n", bus->name);
 708     indent += 2;
 709     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 710     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 711         DeviceState *dev = kid->child;
 712         qdev_print(mon, dev, indent);
 713     }
 714 }
 715 #undef qdev_printf
 716
 717 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
 718 {
 719     if (sysbus_get_default())
 720         qbus_print(mon, sysbus_get_default(), 0);
 721 }
 722
 723 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
 724 {
 725     qdev_print_devinfos(true);
 726 }
 727
 728 typedef struct QOMCompositionState {
 729     Monitor *mon;
 730     int indent;
 731 } QOMCompositionState;
 732
 733 static void print_qom_composition(Monitor *mon, Object *obj, int indent);
 734
 735 static int print_qom_composition_child(Object *obj, void *opaque)
 736 {
 737     QOMCompositionState *s = opaque;
 738
 739     print_qom_composition(s->mon, obj, s->indent);
 740
 741     return 0;
 742 }
 743
 744 static void print_qom_composition(Monitor *mon, Object *obj, int indent)
 745 {
 746     QOMCompositionState s = {
 747         .mon = mon,
 748         .indent = indent + 2,
 749     };
 750     char *name;
 751
 752     if (obj == object_get_root()) {
 753         name = g_strdup("");
 754     } else {
 755         name = object_get_canonical_path_component(obj);
 756     }
 757     monitor_printf(mon, "%*s/%s (%s)\n", indent, "", name,
 758                    object_get_typename(obj));
 759     g_free(name);
 760     object_child_foreach(obj, print_qom_composition_child, &s);
 761 }
 762
 763 void hmp_info_qom_tree(Monitor *mon, const QDict *dict)
 764 {
 765     const char *path = qdict_get_try_str(dict, "path");
 766     Object *obj;
 767     bool ambiguous = false;
 768
 769     if (path) {
 770         obj = object_resolve_path(path, &ambiguous);
 771         if (!obj) {
 772             monitor_printf(mon, "Path '%s' could not be resolved.\n", path);
 773             return;
 774         }
 775         if (ambiguous) {
 776             monitor_printf(mon, "Warning: Path '%s' is ambiguous.\n", path);
 777             return;
 778         }
 779     } else {
 780         obj = qdev_get_machine();
 781     }
 782     print_qom_composition(mon, obj, 0);
 783 }
 784
 785 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
 786 {
 787     Error *local_err = NULL;
 788     QemuOpts *opts;
 789     DeviceState *dev;
 790
 791     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 792     if (local_err) {
 793         error_propagate(errp, local_err);
 794         return;
 795     }
 796     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 797         qemu_opts_del(opts);
 798         return;
 799     }
 800     dev = qdev_device_add(opts, &local_err);
 801     if (!dev) {
 802         error_propagate(errp, local_err);
 803         qemu_opts_del(opts);
 804         return;
 805     }
 806     object_unref(OBJECT(dev));
 807 }
 808
 809 static DeviceState *find_device_state(const char *id, Error **errp)
 810 {
 811     Object *obj;
 812
 813     if (id[0] == '/') {
 814         obj = object_resolve_path(id, NULL);
 815     } else {
 816         char *root_path = object_get_canonical_path(qdev_get_peripheral());
 817         char *path = g_strdup_printf("%s/%s", root_path, id);
 818
 819         g_free(root_path);
 820         obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 821         g_free(path);
 822     }
 823
 824     if (!obj) {
 825         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 826                   "Device '%s' not found", id);
 827         return NULL;
 828     }
 829
 830     if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
 831         error_setg(errp, "%s is not a hotpluggable device", id);
 832         return NULL;
 833     }
 834
 835     return DEVICE(obj);
 836 }
 837
 838 void qmp_device_del(const char *id, Error **errp)
 839 {
 840     DeviceState *dev = find_device_state(id, errp);
 841     if (dev != NULL) {
 842         qdev_unplug(dev, errp);
 843     }
 844 }
 845
 846 BlockBackend *blk_by_qdev_id(const char *id, Error **errp)
 847 {
 848     DeviceState *dev;
 849     BlockBackend *blk;
 850
 851     dev = find_device_state(id, errp);
 852     if (dev == NULL) {
 853         return NULL;
 854     }
 855
 856     blk = blk_by_dev(dev);
 857     if (!blk) {
 858         error_setg(errp, "Device does not have a block device backend");
 859     }
 860     return blk;
 861 }
 862
 863 void qdev_machine_init(void)
 864 {
 865     qdev_get_peripheral_anon();
 866     qdev_get_peripheral();
 867 }
 868
 869 QemuOptsList qemu_device_opts = {
 870     .name = "device",
 871     .implied_opt_name = "driver",
 872     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 873     .desc = {
 874         /*
 875          * no elements => accept any
 876          * sanity checking will happen later
 877          * when setting device properties
 878          */
 879         { /* end of list */ }
 880     },
 881 };
 882
 883 QemuOptsList qemu_global_opts = {
 884     .name = "global",
 885     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 886     .desc = {
 887         {
 888             .name = "driver",
 889             .type = QEMU_OPT_STRING,
 890         },{
 891             .name = "property",
 892             .type = QEMU_OPT_STRING,
 893         },{
 894             .name = "value",
 895             .type = QEMU_OPT_STRING,
 896         },
 897         { /* end of list */ }
 898     },
 899 };
 900
 901 int qemu_global_option(const char *str)
 902 {
 903     char driver[64], property[64];
 904     QemuOpts *opts;
 905     int rc, offset;
 906
 907     rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
 908     if (rc == 2 && str[offset] == '=') {
 909         opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 910         qemu_opt_set(opts, "driver", driver, &error_abort);
 911         qemu_opt_set(opts, "property", property, &error_abort);
 912         qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
 913         return 0;
 914     }
 915
 916     opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
 917     if (!opts) {
 918         return -1;
 919     }
 920
 921     return 0;
 922 }