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/sysbus.h"
  22 #include "monitor/hmp.h"
  23 #include "monitor/monitor.h"
  24 #include "monitor/qdev.h"
  25 #include "sysemu/arch_init.h"
  26 #include "qapi/error.h"
  27 #include "qapi/qapi-commands-qdev.h"
  28 #include "qapi/qmp/qdict.h"
  29 #include "qapi/qmp/qerror.h"
  30 #include "qemu/config-file.h"
  31 #include "qemu/error-report.h"
  32 #include "qemu/help_option.h"
  33 #include "qemu/option.h"
  34 #include "qemu/qemu-print.h"
  35 #include "qemu/option_int.h"
  36 #include "sysemu/block-backend.h"
  37 #include "sysemu/sysemu.h"
  38 #include "migration/misc.h"
  39 #include "migration/migration.h"
  40 #include "qemu/cutils.h"
  41
  42 /*
  43  * Aliases were a bad idea from the start.  Let's keep them
  44  * from spreading further.
  45  */
  46 typedef struct QDevAlias
  47 {
  48     const char *typename;
  49     const char *alias;
  50     uint32_t arch_mask;
  51 } QDevAlias;
  52
  53 /* Please keep this table sorted by typename. */
  54 static const QDevAlias qdev_alias_table[] = {
  55     { "e1000", "e1000-82540em" },
  56     { "ich9-ahci", "ahci" },
  57     { "lsi53c895a", "lsi" },
  58     { "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_S390X },
  59     { "virtio-9p-pci", "virtio-9p", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  60     { "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_S390X },
  61     { "virtio-balloon-pci", "virtio-balloon",
  62             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  63     { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
  64     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  65     { "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_S390X },
  66     { "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  67     { "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_S390X },
  68     { "virtio-input-host-pci", "virtio-input-host",
  69             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  70     { "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_S390X },
  71     { "virtio-keyboard-pci", "virtio-keyboard",
  72             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  73     { "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_S390X },
  74     { "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  75     { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
  76     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  77     { "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_S390X },
  78     { "virtio-rng-pci", "virtio-rng", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  79     { "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_S390X },
  80     { "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  81     { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
  82     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  83     { "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_S390X },
  84     { "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  85     { }
  86 };
  87
  88 static const char *qdev_class_get_alias(DeviceClass *dc)
  89 {
  90     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  91     int i;
  92
  93     for (i = 0; qdev_alias_table[i].typename; i++) {
  94         if (qdev_alias_table[i].arch_mask &&
  95             !(qdev_alias_table[i].arch_mask & arch_type)) {
  96             continue;
  97         }
  98
  99         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
 100             return qdev_alias_table[i].alias;
 101         }
 102     }
 103
 104     return NULL;
 105 }
 106
 107 static bool qdev_class_has_alias(DeviceClass *dc)
 108 {
 109     return (qdev_class_get_alias(dc) != NULL);
 110 }
 111
 112 static void qdev_print_devinfo(DeviceClass *dc)
 113 {
 114     qemu_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
 115     if (dc->bus_type) {
 116         qemu_printf(", bus %s", dc->bus_type);
 117     }
 118     if (qdev_class_has_alias(dc)) {
 119         qemu_printf(", alias \"%s\"", qdev_class_get_alias(dc));
 120     }
 121     if (dc->desc) {
 122         qemu_printf(", desc \"%s\"", dc->desc);
 123     }
 124     if (!dc->user_creatable) {
 125         qemu_printf(", no-user");
 126     }
 127     qemu_printf("\n");
 128 }
 129
 130 static void qdev_print_devinfos(bool show_no_user)
 131 {
 132     static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
 133         [DEVICE_CATEGORY_BRIDGE]  = "Controller/Bridge/Hub",
 134         [DEVICE_CATEGORY_USB]     = "USB",
 135         [DEVICE_CATEGORY_STORAGE] = "Storage",
 136         [DEVICE_CATEGORY_NETWORK] = "Network",
 137         [DEVICE_CATEGORY_INPUT]   = "Input",
 138         [DEVICE_CATEGORY_DISPLAY] = "Display",
 139         [DEVICE_CATEGORY_SOUND]   = "Sound",
 140         [DEVICE_CATEGORY_MISC]    = "Misc",
 141         [DEVICE_CATEGORY_CPU]     = "CPU",
 142         [DEVICE_CATEGORY_MAX]     = "Uncategorized",
 143     };
 144     GSList *list, *elt;
 145     int i;
 146     bool cat_printed;
 147
 148     list = object_class_get_list_sorted(TYPE_DEVICE, false);
 149
 150     for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
 151         cat_printed = false;
 152         for (elt = list; elt; elt = elt->next) {
 153             DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
 154                                                  TYPE_DEVICE);
 155             if ((i < DEVICE_CATEGORY_MAX
 156                  ? !test_bit(i, dc->categories)
 157                  : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
 158                 || (!show_no_user
 159                     && !dc->user_creatable)) {
 160                 continue;
 161             }
 162             if (!cat_printed) {
 163                 qemu_printf("%s%s devices:\n", i ? "\n" : "", cat_name[i]);
 164                 cat_printed = true;
 165             }
 166             qdev_print_devinfo(dc);
 167         }
 168     }
 169
 170     g_slist_free(list);
 171 }
 172
 173 static int set_property(void *opaque, const char *name, const char *value,
 174                         Error **errp)
 175 {
 176     Object *obj = opaque;
 177     Error *err = NULL;
 178
 179     if (strcmp(name, "driver") == 0)
 180         return 0;
 181     if (strcmp(name, "bus") == 0)
 182         return 0;
 183
 184     object_property_parse(obj, value, name, &err);
 185     if (err != NULL) {
 186         error_propagate(errp, err);
 187         return -1;
 188     }
 189     return 0;
 190 }
 191
 192 static const char *find_typename_by_alias(const char *alias)
 193 {
 194     int i;
 195
 196     for (i = 0; qdev_alias_table[i].alias; i++) {
 197         if (qdev_alias_table[i].arch_mask &&
 198             !(qdev_alias_table[i].arch_mask & arch_type)) {
 199             continue;
 200         }
 201
 202         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 203             return qdev_alias_table[i].typename;
 204         }
 205     }
 206
 207     return NULL;
 208 }
 209
 210 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
 211 {
 212     ObjectClass *oc;
 213     DeviceClass *dc;
 214     const char *original_name = *driver;
 215
 216     oc = object_class_by_name(*driver);
 217     if (!oc) {
 218         const char *typename = find_typename_by_alias(*driver);
 219
 220         if (typename) {
 221             *driver = typename;
 222             oc = object_class_by_name(*driver);
 223         }
 224     }
 225
 226     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 227         if (*driver != original_name) {
 228             error_setg(errp, "'%s' (alias '%s') is not a valid device model"
 229                        " name", original_name, *driver);
 230         } else {
 231             error_setg(errp, "'%s' is not a valid device model name", *driver);
 232         }
 233         return NULL;
 234     }
 235
 236     if (object_class_is_abstract(oc)) {
 237         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 238                    "non-abstract device type");
 239         return NULL;
 240     }
 241
 242     dc = DEVICE_CLASS(oc);
 243     if (!dc->user_creatable ||
 244         (qdev_hotplug && !dc->hotpluggable)) {
 245         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 246                    "pluggable device type");
 247         return NULL;
 248     }
 249
 250     return dc;
 251 }
 252
 253
 254 int qdev_device_help(QemuOpts *opts)
 255 {
 256     Error *local_err = NULL;
 257     const char *driver;
 258     ObjectPropertyInfoList *prop_list;
 259     ObjectPropertyInfoList *prop;
 260     GPtrArray *array;
 261     int i;
 262
 263     driver = qemu_opt_get(opts, "driver");
 264     if (driver && is_help_option(driver)) {
 265         qdev_print_devinfos(false);
 266         return 1;
 267     }
 268
 269     if (!driver || !qemu_opt_has_help_opt(opts)) {
 270         return 0;
 271     }
 272
 273     if (!object_class_by_name(driver)) {
 274         const char *typename = find_typename_by_alias(driver);
 275
 276         if (typename) {
 277             driver = typename;
 278         }
 279     }
 280
 281     prop_list = qmp_device_list_properties(driver, &local_err);
 282     if (local_err) {
 283         goto error;
 284     }
 285
 286     if (prop_list) {
 287         qemu_printf("%s options:\n", driver);
 288     } else {
 289         qemu_printf("There are no options for %s.\n", driver);
 290     }
 291     array = g_ptr_array_new();
 292     for (prop = prop_list; prop; prop = prop->next) {
 293         g_ptr_array_add(array,
 294                         object_property_help(prop->value->name,
 295                                              prop->value->type,
 296                                              prop->value->default_value,
 297                                              prop->value->description));
 298     }
 299     g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0);
 300     for (i = 0; i < array->len; i++) {
 301         printf("%s\n", (char *)array->pdata[i]);
 302     }
 303     g_ptr_array_set_free_func(array, g_free);
 304     g_ptr_array_free(array, true);
 305     qapi_free_ObjectPropertyInfoList(prop_list);
 306     return 1;
 307
 308 error:
 309     error_report_err(local_err);
 310     return 1;
 311 }
 312
 313 static Object *qdev_get_peripheral(void)
 314 {
 315     static Object *dev;
 316
 317     if (dev == NULL) {
 318         dev = container_get(qdev_get_machine(), "/peripheral");
 319     }
 320
 321     return dev;
 322 }
 323
 324 static Object *qdev_get_peripheral_anon(void)
 325 {
 326     static Object *dev;
 327
 328     if (dev == NULL) {
 329         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 330     }
 331
 332     return dev;
 333 }
 334
 335 static void qbus_error_append_bus_list_hint(DeviceState *dev,
 336                                             Error *const *errp)
 337 {
 338     BusState *child;
 339     const char *sep = " ";
 340
 341     error_append_hint(errp, "child buses at \"%s\":",
 342                       dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 343     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 344         error_append_hint(errp, "%s\"%s\"", sep, child->name);
 345         sep = ", ";
 346     }
 347     error_append_hint(errp, "\n");
 348 }
 349
 350 static void qbus_error_append_dev_list_hint(BusState *bus,
 351                                             Error *const *errp)
 352 {
 353     BusChild *kid;
 354     const char *sep = " ";
 355
 356     error_append_hint(errp, "devices at \"%s\":", bus->name);
 357     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 358         DeviceState *dev = kid->child;
 359         error_append_hint(errp, "%s\"%s\"", sep,
 360                           object_get_typename(OBJECT(dev)));
 361         if (dev->id) {
 362             error_append_hint(errp, "/\"%s\"", dev->id);
 363         }
 364         sep = ", ";
 365     }
 366     error_append_hint(errp, "\n");
 367 }
 368
 369 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 370 {
 371     BusState *child;
 372
 373     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 374         if (strcmp(child->name, elem) == 0) {
 375             return child;
 376         }
 377     }
 378     return NULL;
 379 }
 380
 381 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 382 {
 383     BusChild *kid;
 384
 385     /*
 386      * try to match in order:
 387      *   (1) instance id, if present
 388      *   (2) driver name
 389      *   (3) driver alias, if present
 390      */
 391     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 392         DeviceState *dev = kid->child;
 393         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 394             return dev;
 395         }
 396     }
 397     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 398         DeviceState *dev = kid->child;
 399         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 400             return dev;
 401         }
 402     }
 403     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 404         DeviceState *dev = kid->child;
 405         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 406
 407         if (qdev_class_has_alias(dc) &&
 408             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 409             return dev;
 410         }
 411     }
 412     return NULL;
 413 }
 414
 415 static inline bool qbus_is_full(BusState *bus)
 416 {
 417     BusClass *bus_class = BUS_GET_CLASS(bus);
 418     return bus_class->max_dev && bus->num_children >= bus_class->max_dev;
 419 }
 420
 421 /*
 422  * Search the tree rooted at @bus for a bus.
 423  * If @name, search for a bus with that name.  Note that bus names
 424  * need not be unique.  Yes, that's screwed up.
 425  * Else search for a bus that is a subtype of @bus_typename.
 426  * If more than one exists, prefer one that can take another device.
 427  * Return the bus if found, else %NULL.
 428  */
 429 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 430                                      const char *bus_typename)
 431 {
 432     BusChild *kid;
 433     BusState *pick, *child, *ret;
 434     bool match;
 435
 436     assert(name || bus_typename);
 437     if (name) {
 438         match = !strcmp(bus->name, name);
 439     } else {
 440         match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
 441     }
 442
 443     if (match && !qbus_is_full(bus)) {
 444         return bus;             /* root matches and isn't full */
 445     }
 446
 447     pick = match ? bus : NULL;
 448
 449     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 450         DeviceState *dev = kid->child;
 451         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 452             ret = qbus_find_recursive(child, name, bus_typename);
 453             if (ret && !qbus_is_full(ret)) {
 454                 return ret;     /* a descendant matches and isn't full */
 455             }
 456             if (ret && !pick) {
 457                 pick = ret;
 458             }
 459         }
 460     }
 461
 462     /* root or a descendant matches, but is full */
 463     return pick;
 464 }
 465
 466 static BusState *qbus_find(const char *path, Error **errp)
 467 {
 468     DeviceState *dev;
 469     BusState *bus;
 470     char elem[128];
 471     int pos, len;
 472
 473     /* find start element */
 474     if (path[0] == '/') {
 475         bus = sysbus_get_default();
 476         pos = 0;
 477     } else {
 478         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 479             assert(!path[0]);
 480             elem[0] = len = 0;
 481         }
 482         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 483         if (!bus) {
 484             error_setg(errp, "Bus '%s' not found", elem);
 485             return NULL;
 486         }
 487         pos = len;
 488     }
 489
 490     for (;;) {
 491         assert(path[pos] == '/' || !path[pos]);
 492         while (path[pos] == '/') {
 493             pos++;
 494         }
 495         if (path[pos] == '\0') {
 496             break;
 497         }
 498
 499         /* find device */
 500         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 501             g_assert_not_reached();
 502             elem[0] = len = 0;
 503         }
 504         pos += len;
 505         dev = qbus_find_dev(bus, elem);
 506         if (!dev) {
 507             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 508                       "Device '%s' not found", elem);
 509             qbus_error_append_dev_list_hint(bus, errp);
 510             return NULL;
 511         }
 512
 513         assert(path[pos] == '/' || !path[pos]);
 514         while (path[pos] == '/') {
 515             pos++;
 516         }
 517         if (path[pos] == '\0') {
 518             /* last specified element is a device.  If it has exactly
 519              * one child bus accept it nevertheless */
 520             if (dev->num_child_bus == 1) {
 521                 bus = QLIST_FIRST(&dev->child_bus);
 522                 break;
 523             }
 524             if (dev->num_child_bus) {
 525                 error_setg(errp, "Device '%s' has multiple child buses",
 526                            elem);
 527                 qbus_error_append_bus_list_hint(dev, errp);
 528             } else {
 529                 error_setg(errp, "Device '%s' has no child bus", elem);
 530             }
 531             return NULL;
 532         }
 533
 534         /* find bus */
 535         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 536             g_assert_not_reached();
 537             elem[0] = len = 0;
 538         }
 539         pos += len;
 540         bus = qbus_find_bus(dev, elem);
 541         if (!bus) {
 542             error_setg(errp, "Bus '%s' not found", elem);
 543             qbus_error_append_bus_list_hint(dev, errp);
 544             return NULL;
 545         }
 546     }
 547
 548     if (qbus_is_full(bus)) {
 549         error_setg(errp, "Bus '%s' is full", path);
 550         return NULL;
 551     }
 552     return bus;
 553 }
 554
 555 void qdev_set_id(DeviceState *dev, const char *id)
 556 {
 557     if (id) {
 558         dev->id = id;
 559     }
 560
 561     if (dev->id) {
 562         object_property_add_child(qdev_get_peripheral(), dev->id,
 563                                   OBJECT(dev), NULL);
 564     } else {
 565         static int anon_count;
 566         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 567         object_property_add_child(qdev_get_peripheral_anon(), name,
 568                                   OBJECT(dev), NULL);
 569         g_free(name);
 570     }
 571 }
 572
 573 static int is_failover_device(void *opaque, const char *name, const char *value,
 574                         Error **errp)
 575 {
 576     if (strcmp(name, "failover_pair_id") == 0) {
 577         QemuOpts *opts = (QemuOpts *)opaque;
 578
 579         if (qdev_should_hide_device(opts)) {
 580             return 1;
 581         }
 582     }
 583
 584     return 0;
 585 }
 586
 587 static bool should_hide_device(QemuOpts *opts)
 588 {
 589     if (qemu_opt_foreach(opts, is_failover_device, opts, NULL) == 0) {
 590         return false;
 591     }
 592     return true;
 593 }
 594
 595 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 596 {
 597     DeviceClass *dc;
 598     const char *driver, *path;
 599     DeviceState *dev = NULL;
 600     BusState *bus = NULL;
 601     Error *err = NULL;
 602     bool hide;
 603
 604     driver = qemu_opt_get(opts, "driver");
 605     if (!driver) {
 606         error_setg(errp, QERR_MISSING_PARAMETER, "driver");
 607         return NULL;
 608     }
 609
 610     /* find driver */
 611     dc = qdev_get_device_class(&driver, errp);
 612     if (!dc) {
 613         return NULL;
 614     }
 615
 616     /* find bus */
 617     path = qemu_opt_get(opts, "bus");
 618     if (path != NULL) {
 619         bus = qbus_find(path, errp);
 620         if (!bus) {
 621             return NULL;
 622         }
 623         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 624             error_setg(errp, "Device '%s' can't go on %s bus",
 625                        driver, object_get_typename(OBJECT(bus)));
 626             return NULL;
 627         }
 628     } else if (dc->bus_type != NULL) {
 629         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 630         if (!bus || qbus_is_full(bus)) {
 631             error_setg(errp, "No '%s' bus found for device '%s'",
 632                        dc->bus_type, driver);
 633             return NULL;
 634         }
 635     }
 636     hide = should_hide_device(opts);
 637
 638     if ((hide || qdev_hotplug) && bus && !qbus_is_hotpluggable(bus)) {
 639         error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
 640         return NULL;
 641     }
 642
 643     if (hide) {
 644         return NULL;
 645     }
 646
 647     if (!migration_is_idle()) {
 648         error_setg(errp, "device_add not allowed while migrating");
 649         return NULL;
 650     }
 651
 652     /* create device */
 653     dev = DEVICE(object_new(driver));
 654
 655     /* Check whether the hotplug is allowed by the machine */
 656     if (qdev_hotplug && !qdev_hotplug_allowed(dev, &err)) {
 657         /* Error must be set in the machine hook */
 658         assert(err);
 659         goto err_del_dev;
 660     }
 661
 662     if (bus) {
 663         qdev_set_parent_bus(dev, bus);
 664     } else if (qdev_hotplug && !qdev_get_machine_hotplug_handler(dev)) {
 665         /* No bus, no machine hotplug handler --> device is not hotpluggable */
 666         error_setg(&err, "Device '%s' can not be hotplugged on this machine",
 667                    driver);
 668         goto err_del_dev;
 669     }
 670
 671     qdev_set_id(dev, qemu_opts_id(opts));
 672
 673     /* set properties */
 674     if (qemu_opt_foreach(opts, set_property, dev, &err)) {
 675         goto err_del_dev;
 676     }
 677
 678     dev->opts = opts;
 679     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 680     if (err != NULL) {
 681         dev->opts = NULL;
 682         goto err_del_dev;
 683     }
 684     return dev;
 685
 686 err_del_dev:
 687     error_propagate(errp, err);
 688     if (dev) {
 689         object_unparent(OBJECT(dev));
 690         object_unref(OBJECT(dev));
 691     }
 692     return NULL;
 693 }
 694
 695
 696 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 697 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 698
 699 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 700                              int indent)
 701 {
 702     if (!props)
 703         return;
 704     for (; props->name; props++) {
 705         Error *err = NULL;
 706         char *value;
 707         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 708         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 709             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 710         } else {
 711             value = object_property_print(OBJECT(dev), props->name, true, &err);
 712         }
 713         g_free(legacy_name);
 714
 715         if (err) {
 716             error_free(err);
 717             continue;
 718         }
 719         qdev_printf("%s = %s\n", props->name,
 720                     value && *value ? value : "<null>");
 721         g_free(value);
 722     }
 723 }
 724
 725 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 726 {
 727     BusClass *bc = BUS_GET_CLASS(bus);
 728
 729     if (bc->print_dev) {
 730         bc->print_dev(mon, dev, indent);
 731     }
 732 }
 733
 734 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 735 {
 736     ObjectClass *class;
 737     BusState *child;
 738     NamedGPIOList *ngl;
 739
 740     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 741                 dev->id ? dev->id : "");
 742     indent += 2;
 743     QLIST_FOREACH(ngl, &dev->gpios, node) {
 744         if (ngl->num_in) {
 745             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 746                         ngl->num_in);
 747         }
 748         if (ngl->num_out) {
 749             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 750                         ngl->num_out);
 751         }
 752     }
 753     class = object_get_class(OBJECT(dev));
 754     do {
 755         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props_, indent);
 756         class = object_class_get_parent(class);
 757     } while (class != object_class_by_name(TYPE_DEVICE));
 758     bus_print_dev(dev->parent_bus, mon, dev, indent);
 759     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 760         qbus_print(mon, child, indent);
 761     }
 762 }
 763
 764 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 765 {
 766     BusChild *kid;
 767
 768     qdev_printf("bus: %s\n", bus->name);
 769     indent += 2;
 770     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 771     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 772         DeviceState *dev = kid->child;
 773         qdev_print(mon, dev, indent);
 774     }
 775 }
 776 #undef qdev_printf
 777
 778 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
 779 {
 780     if (sysbus_get_default())
 781         qbus_print(mon, sysbus_get_default(), 0);
 782 }
 783
 784 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
 785 {
 786     qdev_print_devinfos(true);
 787 }
 788
 789 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
 790 {
 791     Error *local_err = NULL;
 792     QemuOpts *opts;
 793     DeviceState *dev;
 794
 795     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 796     if (local_err) {
 797         error_propagate(errp, local_err);
 798         return;
 799     }
 800     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 801         qemu_opts_del(opts);
 802         return;
 803     }
 804     dev = qdev_device_add(opts, &local_err);
 805     if (!dev) {
 806         error_propagate(errp, local_err);
 807         qemu_opts_del(opts);
 808         return;
 809     }
 810     object_unref(OBJECT(dev));
 811 }
 812
 813 static DeviceState *find_device_state(const char *id, Error **errp)
 814 {
 815     Object *obj;
 816
 817     if (id[0] == '/') {
 818         obj = object_resolve_path(id, NULL);
 819     } else {
 820         char *root_path = object_get_canonical_path(qdev_get_peripheral());
 821         char *path = g_strdup_printf("%s/%s", root_path, id);
 822
 823         g_free(root_path);
 824         obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 825         g_free(path);
 826     }
 827
 828     if (!obj) {
 829         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 830                   "Device '%s' not found", id);
 831         return NULL;
 832     }
 833
 834     if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
 835         error_setg(errp, "%s is not a hotpluggable device", id);
 836         return NULL;
 837     }
 838
 839     return DEVICE(obj);
 840 }
 841
 842 void qdev_unplug(DeviceState *dev, Error **errp)
 843 {
 844     DeviceClass *dc = DEVICE_GET_CLASS(dev);
 845     HotplugHandler *hotplug_ctrl;
 846     HotplugHandlerClass *hdc;
 847     Error *local_err = NULL;
 848
 849     if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
 850         error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
 851         return;
 852     }
 853
 854     if (!dc->hotpluggable) {
 855         error_setg(errp, QERR_DEVICE_NO_HOTPLUG,
 856                    object_get_typename(OBJECT(dev)));
 857         return;
 858     }
 859
 860     if (!migration_is_idle() && !dev->allow_unplug_during_migration) {
 861         error_setg(errp, "device_del not allowed while migrating");
 862         return;
 863     }
 864
 865     qdev_hot_removed = true;
 866
 867     hotplug_ctrl = qdev_get_hotplug_handler(dev);
 868     /* hotpluggable device MUST have HotplugHandler, if it doesn't
 869      * then something is very wrong with it */
 870     g_assert(hotplug_ctrl);
 871
 872     /* If device supports async unplug just request it to be done,
 873      * otherwise just remove it synchronously */
 874     hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
 875     if (hdc->unplug_request) {
 876         hotplug_handler_unplug_request(hotplug_ctrl, dev, &local_err);
 877     } else {
 878         hotplug_handler_unplug(hotplug_ctrl, dev, &local_err);
 879         if (!local_err) {
 880             object_unparent(OBJECT(dev));
 881         }
 882     }
 883     error_propagate(errp, local_err);
 884 }
 885
 886 void qmp_device_del(const char *id, Error **errp)
 887 {
 888     DeviceState *dev = find_device_state(id, errp);
 889     if (dev != NULL) {
 890         qdev_unplug(dev, errp);
 891     }
 892 }
 893
 894 void hmp_device_add(Monitor *mon, const QDict *qdict)
 895 {
 896     Error *err = NULL;
 897
 898     qmp_device_add((QDict *)qdict, NULL, &err);
 899     hmp_handle_error(mon, err);
 900 }
 901
 902 void hmp_device_del(Monitor *mon, const QDict *qdict)
 903 {
 904     const char *id = qdict_get_str(qdict, "id");
 905     Error *err = NULL;
 906
 907     qmp_device_del(id, &err);
 908     hmp_handle_error(mon, err);
 909 }
 910
 911 BlockBackend *blk_by_qdev_id(const char *id, Error **errp)
 912 {
 913     DeviceState *dev;
 914     BlockBackend *blk;
 915
 916     dev = find_device_state(id, errp);
 917     if (dev == NULL) {
 918         return NULL;
 919     }
 920
 921     blk = blk_by_dev(dev);
 922     if (!blk) {
 923         error_setg(errp, "Device does not have a block device backend");
 924     }
 925     return blk;
 926 }
 927
 928 void qdev_machine_init(void)
 929 {
 930     qdev_get_peripheral_anon();
 931     qdev_get_peripheral();
 932 }
 933
 934 QemuOptsList qemu_device_opts = {
 935     .name = "device",
 936     .implied_opt_name = "driver",
 937     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 938     .desc = {
 939         /*
 940          * no elements => accept any
 941          * sanity checking will happen later
 942          * when setting device properties
 943          */
 944         { /* end of list */ }
 945     },
 946 };
 947
 948 QemuOptsList qemu_global_opts = {
 949     .name = "global",
 950     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 951     .desc = {
 952         {
 953             .name = "driver",
 954             .type = QEMU_OPT_STRING,
 955         },{
 956             .name = "property",
 957             .type = QEMU_OPT_STRING,
 958         },{
 959             .name = "value",
 960             .type = QEMU_OPT_STRING,
 961         },
 962         { /* end of list */ }
 963     },
 964 };
 965
 966 int qemu_global_option(const char *str)
 967 {
 968     char driver[64], property[64];
 969     QemuOpts *opts;
 970     int rc, offset;
 971
 972     rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
 973     if (rc == 2 && str[offset] == '=') {
 974         opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 975         qemu_opt_set(opts, "driver", driver, &error_abort);
 976         qemu_opt_set(opts, "property", property, &error_abort);
 977         qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
 978         return 0;
 979     }
 980
 981     opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
 982     if (!opts) {
 983         return -1;
 984     }
 985
 986     return 0;
 987 }