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 #include "hw/clock.h"
  42
  43 /*
  44  * Aliases were a bad idea from the start.  Let's keep them
  45  * from spreading further.
  46  */
  47 typedef struct QDevAlias
  48 {
  49     const char *typename;
  50     const char *alias;
  51     uint32_t arch_mask;
  52 } QDevAlias;
  53
  54 /* Please keep this table sorted by typename. */
  55 static const QDevAlias qdev_alias_table[] = {
  56     { "AC97", "ac97" }, /* -soundhw name */
  57     { "e1000", "e1000-82540em" },
  58     { "ES1370", "es1370" }, /* -soundhw name */
  59     { "ich9-ahci", "ahci" },
  60     { "lsi53c895a", "lsi" },
  61     { "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_S390X },
  62     { "virtio-9p-pci", "virtio-9p", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  63     { "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_S390X },
  64     { "virtio-balloon-pci", "virtio-balloon",
  65             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  66     { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
  67     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  68     { "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_S390X },
  69     { "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  70     { "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_S390X },
  71     { "virtio-input-host-pci", "virtio-input-host",
  72             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  73     { "virtio-iommu-pci", "virtio-iommu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  74     { "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_S390X },
  75     { "virtio-keyboard-pci", "virtio-keyboard",
  76             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  77     { "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_S390X },
  78     { "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  79     { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
  80     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  81     { "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_S390X },
  82     { "virtio-rng-pci", "virtio-rng", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  83     { "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_S390X },
  84     { "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  85     { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
  86     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  87     { "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_S390X },
  88     { "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  89     { }
  90 };
  91
  92 static const char *qdev_class_get_alias(DeviceClass *dc)
  93 {
  94     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  95     int i;
  96
  97     for (i = 0; qdev_alias_table[i].typename; i++) {
  98         if (qdev_alias_table[i].arch_mask &&
  99             !(qdev_alias_table[i].arch_mask & arch_type)) {
 100             continue;
 101         }
 102
 103         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
 104             return qdev_alias_table[i].alias;
 105         }
 106     }
 107
 108     return NULL;
 109 }
 110
 111 static bool qdev_class_has_alias(DeviceClass *dc)
 112 {
 113     return (qdev_class_get_alias(dc) != NULL);
 114 }
 115
 116 static void qdev_print_devinfo(DeviceClass *dc)
 117 {
 118     qemu_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
 119     if (dc->bus_type) {
 120         qemu_printf(", bus %s", dc->bus_type);
 121     }
 122     if (qdev_class_has_alias(dc)) {
 123         qemu_printf(", alias \"%s\"", qdev_class_get_alias(dc));
 124     }
 125     if (dc->desc) {
 126         qemu_printf(", desc \"%s\"", dc->desc);
 127     }
 128     if (!dc->user_creatable) {
 129         qemu_printf(", no-user");
 130     }
 131     qemu_printf("\n");
 132 }
 133
 134 static void qdev_print_devinfos(bool show_no_user)
 135 {
 136     static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
 137         [DEVICE_CATEGORY_BRIDGE]  = "Controller/Bridge/Hub",
 138         [DEVICE_CATEGORY_USB]     = "USB",
 139         [DEVICE_CATEGORY_STORAGE] = "Storage",
 140         [DEVICE_CATEGORY_NETWORK] = "Network",
 141         [DEVICE_CATEGORY_INPUT]   = "Input",
 142         [DEVICE_CATEGORY_DISPLAY] = "Display",
 143         [DEVICE_CATEGORY_SOUND]   = "Sound",
 144         [DEVICE_CATEGORY_MISC]    = "Misc",
 145         [DEVICE_CATEGORY_CPU]     = "CPU",
 146         [DEVICE_CATEGORY_MAX]     = "Uncategorized",
 147     };
 148     GSList *list, *elt;
 149     int i;
 150     bool cat_printed;
 151
 152     module_load_qom_all();
 153     list = object_class_get_list_sorted(TYPE_DEVICE, false);
 154
 155     for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
 156         cat_printed = false;
 157         for (elt = list; elt; elt = elt->next) {
 158             DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
 159                                                  TYPE_DEVICE);
 160             if ((i < DEVICE_CATEGORY_MAX
 161                  ? !test_bit(i, dc->categories)
 162                  : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
 163                 || (!show_no_user
 164                     && !dc->user_creatable)) {
 165                 continue;
 166             }
 167             if (!cat_printed) {
 168                 qemu_printf("%s%s devices:\n", i ? "\n" : "", cat_name[i]);
 169                 cat_printed = true;
 170             }
 171             qdev_print_devinfo(dc);
 172         }
 173     }
 174
 175     g_slist_free(list);
 176 }
 177
 178 static int set_property(void *opaque, const char *name, const char *value,
 179                         Error **errp)
 180 {
 181     Object *obj = opaque;
 182     Error *err = NULL;
 183
 184     if (strcmp(name, "driver") == 0)
 185         return 0;
 186     if (strcmp(name, "bus") == 0)
 187         return 0;
 188
 189     if (!object_property_parse(obj, name, value, &err)) {
 190         error_propagate(errp, err);
 191         return -1;
 192     }
 193     return 0;
 194 }
 195
 196 static const char *find_typename_by_alias(const char *alias)
 197 {
 198     int i;
 199
 200     for (i = 0; qdev_alias_table[i].alias; i++) {
 201         if (qdev_alias_table[i].arch_mask &&
 202             !(qdev_alias_table[i].arch_mask & arch_type)) {
 203             continue;
 204         }
 205
 206         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 207             return qdev_alias_table[i].typename;
 208         }
 209     }
 210
 211     return NULL;
 212 }
 213
 214 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
 215 {
 216     ObjectClass *oc;
 217     DeviceClass *dc;
 218     const char *original_name = *driver;
 219
 220     oc = module_object_class_by_name(*driver);
 221     if (!oc) {
 222         const char *typename = find_typename_by_alias(*driver);
 223
 224         if (typename) {
 225             *driver = typename;
 226             oc = module_object_class_by_name(*driver);
 227         }
 228     }
 229
 230     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 231         if (*driver != original_name) {
 232             error_setg(errp, "'%s' (alias '%s') is not a valid device model"
 233                        " name", original_name, *driver);
 234         } else {
 235             error_setg(errp, "'%s' is not a valid device model name", *driver);
 236         }
 237         return NULL;
 238     }
 239
 240     if (object_class_is_abstract(oc)) {
 241         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 242                    "non-abstract device type");
 243         return NULL;
 244     }
 245
 246     dc = DEVICE_CLASS(oc);
 247     if (!dc->user_creatable ||
 248         (qdev_hotplug && !dc->hotpluggable)) {
 249         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 250                    "pluggable device type");
 251         return NULL;
 252     }
 253
 254     return dc;
 255 }
 256
 257
 258 int qdev_device_help(QemuOpts *opts)
 259 {
 260     Error *local_err = NULL;
 261     const char *driver;
 262     ObjectPropertyInfoList *prop_list;
 263     ObjectPropertyInfoList *prop;
 264     GPtrArray *array;
 265     int i;
 266
 267     driver = qemu_opt_get(opts, "driver");
 268     if (driver && is_help_option(driver)) {
 269         qdev_print_devinfos(false);
 270         return 1;
 271     }
 272
 273     if (!driver || !qemu_opt_has_help_opt(opts)) {
 274         return 0;
 275     }
 276
 277     if (!object_class_by_name(driver)) {
 278         const char *typename = find_typename_by_alias(driver);
 279
 280         if (typename) {
 281             driver = typename;
 282         }
 283     }
 284
 285     prop_list = qmp_device_list_properties(driver, &local_err);
 286     if (local_err) {
 287         goto error;
 288     }
 289
 290     if (prop_list) {
 291         qemu_printf("%s options:\n", driver);
 292     } else {
 293         qemu_printf("There are no options for %s.\n", driver);
 294     }
 295     array = g_ptr_array_new();
 296     for (prop = prop_list; prop; prop = prop->next) {
 297         g_ptr_array_add(array,
 298                         object_property_help(prop->value->name,
 299                                              prop->value->type,
 300                                              prop->value->default_value,
 301                                              prop->value->description));
 302     }
 303     g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0);
 304     for (i = 0; i < array->len; i++) {
 305         printf("%s\n", (char *)array->pdata[i]);
 306     }
 307     g_ptr_array_set_free_func(array, g_free);
 308     g_ptr_array_free(array, true);
 309     qapi_free_ObjectPropertyInfoList(prop_list);
 310     return 1;
 311
 312 error:
 313     error_report_err(local_err);
 314     return 1;
 315 }
 316
 317 static Object *qdev_get_peripheral(void)
 318 {
 319     static Object *dev;
 320
 321     if (dev == NULL) {
 322         dev = container_get(qdev_get_machine(), "/peripheral");
 323     }
 324
 325     return dev;
 326 }
 327
 328 static Object *qdev_get_peripheral_anon(void)
 329 {
 330     static Object *dev;
 331
 332     if (dev == NULL) {
 333         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 334     }
 335
 336     return dev;
 337 }
 338
 339 static void qbus_error_append_bus_list_hint(DeviceState *dev,
 340                                             Error *const *errp)
 341 {
 342     BusState *child;
 343     const char *sep = " ";
 344
 345     error_append_hint(errp, "child buses at \"%s\":",
 346                       dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 347     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 348         error_append_hint(errp, "%s\"%s\"", sep, child->name);
 349         sep = ", ";
 350     }
 351     error_append_hint(errp, "\n");
 352 }
 353
 354 static void qbus_error_append_dev_list_hint(BusState *bus,
 355                                             Error *const *errp)
 356 {
 357     BusChild *kid;
 358     const char *sep = " ";
 359
 360     error_append_hint(errp, "devices at \"%s\":", bus->name);
 361     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 362         DeviceState *dev = kid->child;
 363         error_append_hint(errp, "%s\"%s\"", sep,
 364                           object_get_typename(OBJECT(dev)));
 365         if (dev->id) {
 366             error_append_hint(errp, "/\"%s\"", dev->id);
 367         }
 368         sep = ", ";
 369     }
 370     error_append_hint(errp, "\n");
 371 }
 372
 373 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 374 {
 375     BusState *child;
 376
 377     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 378         if (strcmp(child->name, elem) == 0) {
 379             return child;
 380         }
 381     }
 382     return NULL;
 383 }
 384
 385 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 386 {
 387     BusChild *kid;
 388
 389     /*
 390      * try to match in order:
 391      *   (1) instance id, if present
 392      *   (2) driver name
 393      *   (3) driver alias, if present
 394      */
 395     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 396         DeviceState *dev = kid->child;
 397         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 398             return dev;
 399         }
 400     }
 401     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 402         DeviceState *dev = kid->child;
 403         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 404             return dev;
 405         }
 406     }
 407     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 408         DeviceState *dev = kid->child;
 409         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 410
 411         if (qdev_class_has_alias(dc) &&
 412             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 413             return dev;
 414         }
 415     }
 416     return NULL;
 417 }
 418
 419 static inline bool qbus_is_full(BusState *bus)
 420 {
 421     BusClass *bus_class = BUS_GET_CLASS(bus);
 422     return bus_class->max_dev && bus->num_children >= bus_class->max_dev;
 423 }
 424
 425 /*
 426  * Search the tree rooted at @bus for a bus.
 427  * If @name, search for a bus with that name.  Note that bus names
 428  * need not be unique.  Yes, that's screwed up.
 429  * Else search for a bus that is a subtype of @bus_typename.
 430  * If more than one exists, prefer one that can take another device.
 431  * Return the bus if found, else %NULL.
 432  */
 433 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 434                                      const char *bus_typename)
 435 {
 436     BusChild *kid;
 437     BusState *pick, *child, *ret;
 438     bool match;
 439
 440     assert(name || bus_typename);
 441     if (name) {
 442         match = !strcmp(bus->name, name);
 443     } else {
 444         match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
 445     }
 446
 447     if (match && !qbus_is_full(bus)) {
 448         return bus;             /* root matches and isn't full */
 449     }
 450
 451     pick = match ? bus : NULL;
 452
 453     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 454         DeviceState *dev = kid->child;
 455         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 456             ret = qbus_find_recursive(child, name, bus_typename);
 457             if (ret && !qbus_is_full(ret)) {
 458                 return ret;     /* a descendant matches and isn't full */
 459             }
 460             if (ret && !pick) {
 461                 pick = ret;
 462             }
 463         }
 464     }
 465
 466     /* root or a descendant matches, but is full */
 467     return pick;
 468 }
 469
 470 static BusState *qbus_find(const char *path, Error **errp)
 471 {
 472     DeviceState *dev;
 473     BusState *bus;
 474     char elem[128];
 475     int pos, len;
 476
 477     /* find start element */
 478     if (path[0] == '/') {
 479         bus = sysbus_get_default();
 480         pos = 0;
 481     } else {
 482         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 483             assert(!path[0]);
 484             elem[0] = len = 0;
 485         }
 486         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 487         if (!bus) {
 488             error_setg(errp, "Bus '%s' not found", elem);
 489             return NULL;
 490         }
 491         pos = len;
 492     }
 493
 494     for (;;) {
 495         assert(path[pos] == '/' || !path[pos]);
 496         while (path[pos] == '/') {
 497             pos++;
 498         }
 499         if (path[pos] == '\0') {
 500             break;
 501         }
 502
 503         /* find device */
 504         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 505             g_assert_not_reached();
 506             elem[0] = len = 0;
 507         }
 508         pos += len;
 509         dev = qbus_find_dev(bus, elem);
 510         if (!dev) {
 511             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 512                       "Device '%s' not found", elem);
 513             qbus_error_append_dev_list_hint(bus, errp);
 514             return NULL;
 515         }
 516
 517         assert(path[pos] == '/' || !path[pos]);
 518         while (path[pos] == '/') {
 519             pos++;
 520         }
 521         if (path[pos] == '\0') {
 522             /* last specified element is a device.  If it has exactly
 523              * one child bus accept it nevertheless */
 524             if (dev->num_child_bus == 1) {
 525                 bus = QLIST_FIRST(&dev->child_bus);
 526                 break;
 527             }
 528             if (dev->num_child_bus) {
 529                 error_setg(errp, "Device '%s' has multiple child buses",
 530                            elem);
 531                 qbus_error_append_bus_list_hint(dev, errp);
 532             } else {
 533                 error_setg(errp, "Device '%s' has no child bus", elem);
 534             }
 535             return NULL;
 536         }
 537
 538         /* find bus */
 539         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 540             g_assert_not_reached();
 541             elem[0] = len = 0;
 542         }
 543         pos += len;
 544         bus = qbus_find_bus(dev, elem);
 545         if (!bus) {
 546             error_setg(errp, "Bus '%s' not found", elem);
 547             qbus_error_append_bus_list_hint(dev, errp);
 548             return NULL;
 549         }
 550     }
 551
 552     if (qbus_is_full(bus)) {
 553         error_setg(errp, "Bus '%s' is full", path);
 554         return NULL;
 555     }
 556     return bus;
 557 }
 558
 559 void qdev_set_id(DeviceState *dev, const char *id)
 560 {
 561     if (id) {
 562         dev->id = id;
 563     }
 564
 565     if (dev->id) {
 566         object_property_add_child(qdev_get_peripheral(), dev->id,
 567                                   OBJECT(dev));
 568     } else {
 569         static int anon_count;
 570         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 571         object_property_add_child(qdev_get_peripheral_anon(), name,
 572                                   OBJECT(dev));
 573         g_free(name);
 574     }
 575 }
 576
 577 static int is_failover_device(void *opaque, const char *name, const char *value,
 578                         Error **errp)
 579 {
 580     if (strcmp(name, "failover_pair_id") == 0) {
 581         QemuOpts *opts = (QemuOpts *)opaque;
 582
 583         if (qdev_should_hide_device(opts)) {
 584             return 1;
 585         }
 586     }
 587
 588     return 0;
 589 }
 590
 591 static bool should_hide_device(QemuOpts *opts)
 592 {
 593     if (qemu_opt_foreach(opts, is_failover_device, opts, NULL) == 0) {
 594         return false;
 595     }
 596     return true;
 597 }
 598
 599 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 600 {
 601     DeviceClass *dc;
 602     const char *driver, *path;
 603     DeviceState *dev = NULL;
 604     BusState *bus = NULL;
 605     Error *err = NULL;
 606     bool hide;
 607
 608     driver = qemu_opt_get(opts, "driver");
 609     if (!driver) {
 610         error_setg(errp, QERR_MISSING_PARAMETER, "driver");
 611         return NULL;
 612     }
 613
 614     /* find driver */
 615     dc = qdev_get_device_class(&driver, errp);
 616     if (!dc) {
 617         return NULL;
 618     }
 619
 620     /* find bus */
 621     path = qemu_opt_get(opts, "bus");
 622     if (path != NULL) {
 623         bus = qbus_find(path, errp);
 624         if (!bus) {
 625             return NULL;
 626         }
 627         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 628             error_setg(errp, "Device '%s' can't go on %s bus",
 629                        driver, object_get_typename(OBJECT(bus)));
 630             return NULL;
 631         }
 632     } else if (dc->bus_type != NULL) {
 633         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 634         if (!bus || qbus_is_full(bus)) {
 635             error_setg(errp, "No '%s' bus found for device '%s'",
 636                        dc->bus_type, driver);
 637             return NULL;
 638         }
 639     }
 640     hide = should_hide_device(opts);
 641
 642     if ((hide || qdev_hotplug) && bus && !qbus_is_hotpluggable(bus)) {
 643         error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
 644         return NULL;
 645     }
 646
 647     if (hide) {
 648         return NULL;
 649     }
 650
 651     if (!migration_is_idle()) {
 652         error_setg(errp, "device_add not allowed while migrating");
 653         return NULL;
 654     }
 655
 656     /* create device */
 657     dev = qdev_new(driver);
 658
 659     /* Check whether the hotplug is allowed by the machine */
 660     if (qdev_hotplug && !qdev_hotplug_allowed(dev, &err)) {
 661         /* Error must be set in the machine hook */
 662         assert(err);
 663         goto err_del_dev;
 664     }
 665
 666     if (!bus && qdev_hotplug && !qdev_get_machine_hotplug_handler(dev)) {
 667         /* No bus, no machine hotplug handler --> device is not hotpluggable */
 668         error_setg(&err, "Device '%s' can not be hotplugged on this machine",
 669                    driver);
 670         goto err_del_dev;
 671     }
 672
 673     qdev_set_id(dev, qemu_opts_id(opts));
 674
 675     /* set properties */
 676     if (qemu_opt_foreach(opts, set_property, dev, &err)) {
 677         goto err_del_dev;
 678     }
 679
 680     dev->opts = opts;
 681     if (!qdev_realize(DEVICE(dev), bus, &err)) {
 682         dev->opts = NULL;
 683         goto err_del_dev;
 684     }
 685     return dev;
 686
 687 err_del_dev:
 688     error_propagate(errp, err);
 689     if (dev) {
 690         object_unparent(OBJECT(dev));
 691         object_unref(OBJECT(dev));
 692     }
 693     return NULL;
 694 }
 695
 696
 697 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 698 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 699
 700 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 701                              int indent)
 702 {
 703     if (!props)
 704         return;
 705     for (; props->name; props++) {
 706         Error *err = NULL;
 707         char *value;
 708         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 709         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 710             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 711         } else {
 712             value = object_property_print(OBJECT(dev), props->name, true, &err);
 713         }
 714         g_free(legacy_name);
 715
 716         if (err) {
 717             error_free(err);
 718             continue;
 719         }
 720         qdev_printf("%s = %s\n", props->name,
 721                     value && *value ? value : "<null>");
 722         g_free(value);
 723     }
 724 }
 725
 726 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 727 {
 728     BusClass *bc = BUS_GET_CLASS(bus);
 729
 730     if (bc->print_dev) {
 731         bc->print_dev(mon, dev, indent);
 732     }
 733 }
 734
 735 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 736 {
 737     ObjectClass *class;
 738     BusState *child;
 739     NamedGPIOList *ngl;
 740     NamedClockList *ncl;
 741
 742     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 743                 dev->id ? dev->id : "");
 744     indent += 2;
 745     QLIST_FOREACH(ngl, &dev->gpios, node) {
 746         if (ngl->num_in) {
 747             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 748                         ngl->num_in);
 749         }
 750         if (ngl->num_out) {
 751             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 752                         ngl->num_out);
 753         }
 754     }
 755     QLIST_FOREACH(ncl, &dev->clocks, node) {
 756         qdev_printf("clock-%s%s \"%s\" freq_hz=%e\n",
 757                     ncl->output ? "out" : "in",
 758                     ncl->alias ? " (alias)" : "",
 759                     ncl->name,
 760                     CLOCK_PERIOD_TO_HZ(1.0 * clock_get(ncl->clock)));
 761     }
 762     class = object_get_class(OBJECT(dev));
 763     do {
 764         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props_, indent);
 765         class = object_class_get_parent(class);
 766     } while (class != object_class_by_name(TYPE_DEVICE));
 767     bus_print_dev(dev->parent_bus, mon, dev, indent);
 768     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 769         qbus_print(mon, child, indent);
 770     }
 771 }
 772
 773 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 774 {
 775     BusChild *kid;
 776
 777     qdev_printf("bus: %s\n", bus->name);
 778     indent += 2;
 779     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 780     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 781         DeviceState *dev = kid->child;
 782         qdev_print(mon, dev, indent);
 783     }
 784 }
 785 #undef qdev_printf
 786
 787 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
 788 {
 789     if (sysbus_get_default())
 790         qbus_print(mon, sysbus_get_default(), 0);
 791 }
 792
 793 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
 794 {
 795     qdev_print_devinfos(true);
 796 }
 797
 798 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
 799 {
 800     Error *local_err = NULL;
 801     QemuOpts *opts;
 802     DeviceState *dev;
 803
 804     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, errp);
 805     if (!opts) {
 806         return;
 807     }
 808     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 809         qemu_opts_del(opts);
 810         return;
 811     }
 812     dev = qdev_device_add(opts, &local_err);
 813     if (!dev) {
 814         error_propagate(errp, local_err);
 815         qemu_opts_del(opts);
 816         return;
 817     }
 818     object_unref(OBJECT(dev));
 819 }
 820
 821 static DeviceState *find_device_state(const char *id, Error **errp)
 822 {
 823     Object *obj;
 824
 825     if (id[0] == '/') {
 826         obj = object_resolve_path(id, NULL);
 827     } else {
 828         char *root_path = object_get_canonical_path(qdev_get_peripheral());
 829         char *path = g_strdup_printf("%s/%s", root_path, id);
 830
 831         g_free(root_path);
 832         obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 833         g_free(path);
 834     }
 835
 836     if (!obj) {
 837         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 838                   "Device '%s' not found", id);
 839         return NULL;
 840     }
 841
 842     if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
 843         error_setg(errp, "%s is not a hotpluggable device", id);
 844         return NULL;
 845     }
 846
 847     return DEVICE(obj);
 848 }
 849
 850 void qdev_unplug(DeviceState *dev, Error **errp)
 851 {
 852     DeviceClass *dc = DEVICE_GET_CLASS(dev);
 853     HotplugHandler *hotplug_ctrl;
 854     HotplugHandlerClass *hdc;
 855     Error *local_err = NULL;
 856
 857     if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
 858         error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
 859         return;
 860     }
 861
 862     if (!dc->hotpluggable) {
 863         error_setg(errp, QERR_DEVICE_NO_HOTPLUG,
 864                    object_get_typename(OBJECT(dev)));
 865         return;
 866     }
 867
 868     if (!migration_is_idle() && !dev->allow_unplug_during_migration) {
 869         error_setg(errp, "device_del not allowed while migrating");
 870         return;
 871     }
 872
 873     qdev_hot_removed = true;
 874
 875     hotplug_ctrl = qdev_get_hotplug_handler(dev);
 876     /* hotpluggable device MUST have HotplugHandler, if it doesn't
 877      * then something is very wrong with it */
 878     g_assert(hotplug_ctrl);
 879
 880     /* If device supports async unplug just request it to be done,
 881      * otherwise just remove it synchronously */
 882     hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
 883     if (hdc->unplug_request) {
 884         hotplug_handler_unplug_request(hotplug_ctrl, dev, &local_err);
 885     } else {
 886         hotplug_handler_unplug(hotplug_ctrl, dev, &local_err);
 887         if (!local_err) {
 888             object_unparent(OBJECT(dev));
 889         }
 890     }
 891     error_propagate(errp, local_err);
 892 }
 893
 894 void qmp_device_del(const char *id, Error **errp)
 895 {
 896     DeviceState *dev = find_device_state(id, errp);
 897     if (dev != NULL) {
 898         if (dev->pending_deleted_event) {
 899             error_setg(errp, "Device %s is already in the "
 900                              "process of unplug", id);
 901             return;
 902         }
 903
 904         qdev_unplug(dev, errp);
 905     }
 906 }
 907
 908 void hmp_device_add(Monitor *mon, const QDict *qdict)
 909 {
 910     Error *err = NULL;
 911
 912     qmp_device_add((QDict *)qdict, NULL, &err);
 913     hmp_handle_error(mon, err);
 914 }
 915
 916 void hmp_device_del(Monitor *mon, const QDict *qdict)
 917 {
 918     const char *id = qdict_get_str(qdict, "id");
 919     Error *err = NULL;
 920
 921     qmp_device_del(id, &err);
 922     hmp_handle_error(mon, err);
 923 }
 924
 925 BlockBackend *blk_by_qdev_id(const char *id, Error **errp)
 926 {
 927     DeviceState *dev;
 928     BlockBackend *blk;
 929
 930     dev = find_device_state(id, errp);
 931     if (dev == NULL) {
 932         return NULL;
 933     }
 934
 935     blk = blk_by_dev(dev);
 936     if (!blk) {
 937         error_setg(errp, "Device does not have a block device backend");
 938     }
 939     return blk;
 940 }
 941
 942 void qdev_machine_init(void)
 943 {
 944     qdev_get_peripheral_anon();
 945     qdev_get_peripheral();
 946 }
 947
 948 QemuOptsList qemu_device_opts = {
 949     .name = "device",
 950     .implied_opt_name = "driver",
 951     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 952     .desc = {
 953         /*
 954          * no elements => accept any
 955          * sanity checking will happen later
 956          * when setting device properties
 957          */
 958         { /* end of list */ }
 959     },
 960 };
 961
 962 QemuOptsList qemu_global_opts = {
 963     .name = "global",
 964     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 965     .desc = {
 966         {
 967             .name = "driver",
 968             .type = QEMU_OPT_STRING,
 969         },{
 970             .name = "property",
 971             .type = QEMU_OPT_STRING,
 972         },{
 973             .name = "value",
 974             .type = QEMU_OPT_STRING,
 975         },
 976         { /* end of list */ }
 977     },
 978 };
 979
 980 int qemu_global_option(const char *str)
 981 {
 982     char driver[64], property[64];
 983     QemuOpts *opts;
 984     int rc, offset;
 985
 986     rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
 987     if (rc == 2 && str[offset] == '=') {
 988         opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 989         qemu_opt_set(opts, "driver", driver, &error_abort);
 990         qemu_opt_set(opts, "property", property, &error_abort);
 991         qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
 992         return 0;
 993     }
 994
 995     opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
 996     if (!opts) {
 997         return -1;
 998     }
 999
1000     return 0;
1001 }