softmmu/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
 183     if (strcmp(name, "driver") == 0)
 184         return 0;
 185     if (strcmp(name, "bus") == 0)
 186         return 0;
 187
 188     if (!object_property_parse(obj, name, value, errp)) {
 189         return -1;
 190     }
 191     return 0;
 192 }
 193
 194 static const char *find_typename_by_alias(const char *alias)
 195 {
 196     int i;
 197
 198     for (i = 0; qdev_alias_table[i].alias; i++) {
 199         if (qdev_alias_table[i].arch_mask &&
 200             !(qdev_alias_table[i].arch_mask & arch_type)) {
 201             continue;
 202         }
 203
 204         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 205             return qdev_alias_table[i].typename;
 206         }
 207     }
 208
 209     return NULL;
 210 }
 211
 212 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
 213 {
 214     ObjectClass *oc;
 215     DeviceClass *dc;
 216     const char *original_name = *driver;
 217
 218     oc = module_object_class_by_name(*driver);
 219     if (!oc) {
 220         const char *typename = find_typename_by_alias(*driver);
 221
 222         if (typename) {
 223             *driver = typename;
 224             oc = module_object_class_by_name(*driver);
 225         }
 226     }
 227
 228     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 229         if (*driver != original_name) {
 230             error_setg(errp, "'%s' (alias '%s') is not a valid device model"
 231                        " name", original_name, *driver);
 232         } else {
 233             error_setg(errp, "'%s' is not a valid device model name", *driver);
 234         }
 235         return NULL;
 236     }
 237
 238     if (object_class_is_abstract(oc)) {
 239         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 240                    "non-abstract device type");
 241         return NULL;
 242     }
 243
 244     dc = DEVICE_CLASS(oc);
 245     if (!dc->user_creatable ||
 246         (qdev_hotplug && !dc->hotpluggable)) {
 247         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 248                    "pluggable device type");
 249         return NULL;
 250     }
 251
 252     return dc;
 253 }
 254
 255
 256 int qdev_device_help(QemuOpts *opts)
 257 {
 258     Error *local_err = NULL;
 259     const char *driver;
 260     ObjectPropertyInfoList *prop_list;
 261     ObjectPropertyInfoList *prop;
 262     GPtrArray *array;
 263     int i;
 264
 265     driver = qemu_opt_get(opts, "driver");
 266     if (driver && is_help_option(driver)) {
 267         qdev_print_devinfos(false);
 268         return 1;
 269     }
 270
 271     if (!driver || !qemu_opt_has_help_opt(opts)) {
 272         return 0;
 273     }
 274
 275     if (!object_class_by_name(driver)) {
 276         const char *typename = find_typename_by_alias(driver);
 277
 278         if (typename) {
 279             driver = typename;
 280         }
 281     }
 282
 283     prop_list = qmp_device_list_properties(driver, &local_err);
 284     if (local_err) {
 285         goto error;
 286     }
 287
 288     if (prop_list) {
 289         qemu_printf("%s options:\n", driver);
 290     } else {
 291         qemu_printf("There are no options for %s.\n", driver);
 292     }
 293     array = g_ptr_array_new();
 294     for (prop = prop_list; prop; prop = prop->next) {
 295         g_ptr_array_add(array,
 296                         object_property_help(prop->value->name,
 297                                              prop->value->type,
 298                                              prop->value->default_value,
 299                                              prop->value->description));
 300     }
 301     g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0);
 302     for (i = 0; i < array->len; i++) {
 303         qemu_printf("%s\n", (char *)array->pdata[i]);
 304     }
 305     g_ptr_array_set_free_func(array, g_free);
 306     g_ptr_array_free(array, true);
 307     qapi_free_ObjectPropertyInfoList(prop_list);
 308     return 1;
 309
 310 error:
 311     error_report_err(local_err);
 312     return 1;
 313 }
 314
 315 static Object *qdev_get_peripheral(void)
 316 {
 317     static Object *dev;
 318
 319     if (dev == NULL) {
 320         dev = container_get(qdev_get_machine(), "/peripheral");
 321     }
 322
 323     return dev;
 324 }
 325
 326 static Object *qdev_get_peripheral_anon(void)
 327 {
 328     static Object *dev;
 329
 330     if (dev == NULL) {
 331         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 332     }
 333
 334     return dev;
 335 }
 336
 337 static void qbus_error_append_bus_list_hint(DeviceState *dev,
 338                                             Error *const *errp)
 339 {
 340     BusState *child;
 341     const char *sep = " ";
 342
 343     error_append_hint(errp, "child buses at \"%s\":",
 344                       dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 345     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 346         error_append_hint(errp, "%s\"%s\"", sep, child->name);
 347         sep = ", ";
 348     }
 349     error_append_hint(errp, "\n");
 350 }
 351
 352 static void qbus_error_append_dev_list_hint(BusState *bus,
 353                                             Error *const *errp)
 354 {
 355     BusChild *kid;
 356     const char *sep = " ";
 357
 358     error_append_hint(errp, "devices at \"%s\":", bus->name);
 359     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 360         DeviceState *dev = kid->child;
 361         error_append_hint(errp, "%s\"%s\"", sep,
 362                           object_get_typename(OBJECT(dev)));
 363         if (dev->id) {
 364             error_append_hint(errp, "/\"%s\"", dev->id);
 365         }
 366         sep = ", ";
 367     }
 368     error_append_hint(errp, "\n");
 369 }
 370
 371 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 372 {
 373     BusState *child;
 374
 375     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 376         if (strcmp(child->name, elem) == 0) {
 377             return child;
 378         }
 379     }
 380     return NULL;
 381 }
 382
 383 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 384 {
 385     BusChild *kid;
 386
 387     /*
 388      * try to match in order:
 389      *   (1) instance id, if present
 390      *   (2) driver name
 391      *   (3) driver alias, if present
 392      */
 393     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 394         DeviceState *dev = kid->child;
 395         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 396             return dev;
 397         }
 398     }
 399     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 400         DeviceState *dev = kid->child;
 401         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 402             return dev;
 403         }
 404     }
 405     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 406         DeviceState *dev = kid->child;
 407         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 408
 409         if (qdev_class_has_alias(dc) &&
 410             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 411             return dev;
 412         }
 413     }
 414     return NULL;
 415 }
 416
 417 static inline bool qbus_is_full(BusState *bus)
 418 {
 419     BusClass *bus_class = BUS_GET_CLASS(bus);
 420     return bus_class->max_dev && bus->num_children >= bus_class->max_dev;
 421 }
 422
 423 /*
 424  * Search the tree rooted at @bus for a bus.
 425  * If @name, search for a bus with that name.  Note that bus names
 426  * need not be unique.  Yes, that's screwed up.
 427  * Else search for a bus that is a subtype of @bus_typename.
 428  * If more than one exists, prefer one that can take another device.
 429  * Return the bus if found, else %NULL.
 430  */
 431 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 432                                      const char *bus_typename)
 433 {
 434     BusChild *kid;
 435     BusState *pick, *child, *ret;
 436     bool match;
 437
 438     assert(name || bus_typename);
 439     if (name) {
 440         match = !strcmp(bus->name, name);
 441     } else {
 442         match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
 443     }
 444
 445     if (match && !qbus_is_full(bus)) {
 446         return bus;             /* root matches and isn't full */
 447     }
 448
 449     pick = match ? bus : NULL;
 450
 451     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 452         DeviceState *dev = kid->child;
 453         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 454             ret = qbus_find_recursive(child, name, bus_typename);
 455             if (ret && !qbus_is_full(ret)) {
 456                 return ret;     /* a descendant matches and isn't full */
 457             }
 458             if (ret && !pick) {
 459                 pick = ret;
 460             }
 461         }
 462     }
 463
 464     /* root or a descendant matches, but is full */
 465     return pick;
 466 }
 467
 468 static BusState *qbus_find(const char *path, Error **errp)
 469 {
 470     DeviceState *dev;
 471     BusState *bus;
 472     char elem[128];
 473     int pos, len;
 474
 475     /* find start element */
 476     if (path[0] == '/') {
 477         bus = sysbus_get_default();
 478         pos = 0;
 479     } else {
 480         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 481             assert(!path[0]);
 482             elem[0] = len = 0;
 483         }
 484         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 485         if (!bus) {
 486             error_setg(errp, "Bus '%s' not found", elem);
 487             return NULL;
 488         }
 489         pos = len;
 490     }
 491
 492     for (;;) {
 493         assert(path[pos] == '/' || !path[pos]);
 494         while (path[pos] == '/') {
 495             pos++;
 496         }
 497         if (path[pos] == '\0') {
 498             break;
 499         }
 500
 501         /* find device */
 502         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 503             g_assert_not_reached();
 504             elem[0] = len = 0;
 505         }
 506         pos += len;
 507         dev = qbus_find_dev(bus, elem);
 508         if (!dev) {
 509             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 510                       "Device '%s' not found", elem);
 511             qbus_error_append_dev_list_hint(bus, errp);
 512             return NULL;
 513         }
 514
 515         assert(path[pos] == '/' || !path[pos]);
 516         while (path[pos] == '/') {
 517             pos++;
 518         }
 519         if (path[pos] == '\0') {
 520             /* last specified element is a device.  If it has exactly
 521              * one child bus accept it nevertheless */
 522             if (dev->num_child_bus == 1) {
 523                 bus = QLIST_FIRST(&dev->child_bus);
 524                 break;
 525             }
 526             if (dev->num_child_bus) {
 527                 error_setg(errp, "Device '%s' has multiple child buses",
 528                            elem);
 529                 qbus_error_append_bus_list_hint(dev, errp);
 530             } else {
 531                 error_setg(errp, "Device '%s' has no child bus", elem);
 532             }
 533             return NULL;
 534         }
 535
 536         /* find bus */
 537         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 538             g_assert_not_reached();
 539             elem[0] = len = 0;
 540         }
 541         pos += len;
 542         bus = qbus_find_bus(dev, elem);
 543         if (!bus) {
 544             error_setg(errp, "Bus '%s' not found", elem);
 545             qbus_error_append_bus_list_hint(dev, errp);
 546             return NULL;
 547         }
 548     }
 549
 550     if (qbus_is_full(bus)) {
 551         error_setg(errp, "Bus '%s' is full", path);
 552         return NULL;
 553     }
 554     return bus;
 555 }
 556
 557 void qdev_set_id(DeviceState *dev, const char *id)
 558 {
 559     if (id) {
 560         dev->id = id;
 561     }
 562
 563     if (dev->id) {
 564         object_property_add_child(qdev_get_peripheral(), dev->id,
 565                                   OBJECT(dev));
 566     } else {
 567         static int anon_count;
 568         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 569         object_property_add_child(qdev_get_peripheral_anon(), name,
 570                                   OBJECT(dev));
 571         g_free(name);
 572     }
 573 }
 574
 575 static int is_failover_device(void *opaque, const char *name, const char *value,
 576                         Error **errp)
 577 {
 578     if (strcmp(name, "failover_pair_id") == 0) {
 579         QemuOpts *opts = (QemuOpts *)opaque;
 580
 581         if (qdev_should_hide_device(opts)) {
 582             return 1;
 583         }
 584     }
 585
 586     return 0;
 587 }
 588
 589 static bool should_hide_device(QemuOpts *opts)
 590 {
 591     if (qemu_opt_foreach(opts, is_failover_device, opts, NULL) == 0) {
 592         return false;
 593     }
 594     return true;
 595 }
 596
 597 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 598 {
 599     DeviceClass *dc;
 600     const char *driver, *path;
 601     DeviceState *dev = NULL;
 602     BusState *bus = NULL;
 603     bool hide;
 604
 605     driver = qemu_opt_get(opts, "driver");
 606     if (!driver) {
 607         error_setg(errp, QERR_MISSING_PARAMETER, "driver");
 608         return NULL;
 609     }
 610
 611     /* find driver */
 612     dc = qdev_get_device_class(&driver, errp);
 613     if (!dc) {
 614         return NULL;
 615     }
 616
 617     /* find bus */
 618     path = qemu_opt_get(opts, "bus");
 619     if (path != NULL) {
 620         bus = qbus_find(path, errp);
 621         if (!bus) {
 622             return NULL;
 623         }
 624         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 625             error_setg(errp, "Device '%s' can't go on %s bus",
 626                        driver, object_get_typename(OBJECT(bus)));
 627             return NULL;
 628         }
 629     } else if (dc->bus_type != NULL) {
 630         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 631         if (!bus || qbus_is_full(bus)) {
 632             error_setg(errp, "No '%s' bus found for device '%s'",
 633                        dc->bus_type, driver);
 634             return NULL;
 635         }
 636     }
 637     hide = should_hide_device(opts);
 638
 639     if ((hide || qdev_hotplug) && bus && !qbus_is_hotpluggable(bus)) {
 640         error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
 641         return NULL;
 642     }
 643
 644     if (hide) {
 645         return NULL;
 646     }
 647
 648     if (!migration_is_idle()) {
 649         error_setg(errp, "device_add not allowed while migrating");
 650         return NULL;
 651     }
 652
 653     /* create device */
 654     dev = qdev_new(driver);
 655
 656     /* Check whether the hotplug is allowed by the machine */
 657     if (qdev_hotplug && !qdev_hotplug_allowed(dev, errp)) {
 658         goto err_del_dev;
 659     }
 660
 661     if (!bus && qdev_hotplug && !qdev_get_machine_hotplug_handler(dev)) {
 662         /* No bus, no machine hotplug handler --> device is not hotpluggable */
 663         error_setg(errp, "Device '%s' can not be hotplugged on this machine",
 664                    driver);
 665         goto err_del_dev;
 666     }
 667
 668     qdev_set_id(dev, qemu_opts_id(opts));
 669
 670     /* set properties */
 671     if (qemu_opt_foreach(opts, set_property, dev, errp)) {
 672         goto err_del_dev;
 673     }
 674
 675     dev->opts = opts;
 676     if (!qdev_realize(DEVICE(dev), bus, errp)) {
 677         dev->opts = NULL;
 678         goto err_del_dev;
 679     }
 680     return dev;
 681
 682 err_del_dev:
 683     if (dev) {
 684         object_unparent(OBJECT(dev));
 685         object_unref(OBJECT(dev));
 686     }
 687     return NULL;
 688 }
 689
 690
 691 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 692 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 693
 694 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 695                              int indent)
 696 {
 697     if (!props)
 698         return;
 699     for (; props->name; props++) {
 700         char *value;
 701         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 702
 703         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 704             value = object_property_get_str(OBJECT(dev), legacy_name, NULL);
 705         } else {
 706             value = object_property_print(OBJECT(dev), props->name, true,
 707                                           NULL);
 708         }
 709         g_free(legacy_name);
 710
 711         if (!value) {
 712             continue;
 713         }
 714         qdev_printf("%s = %s\n", props->name,
 715                     *value ? value : "<null>");
 716         g_free(value);
 717     }
 718 }
 719
 720 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 721 {
 722     BusClass *bc = BUS_GET_CLASS(bus);
 723
 724     if (bc->print_dev) {
 725         bc->print_dev(mon, dev, indent);
 726     }
 727 }
 728
 729 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 730 {
 731     ObjectClass *class;
 732     BusState *child;
 733     NamedGPIOList *ngl;
 734     NamedClockList *ncl;
 735
 736     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 737                 dev->id ? dev->id : "");
 738     indent += 2;
 739     QLIST_FOREACH(ngl, &dev->gpios, node) {
 740         if (ngl->num_in) {
 741             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 742                         ngl->num_in);
 743         }
 744         if (ngl->num_out) {
 745             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 746                         ngl->num_out);
 747         }
 748     }
 749     QLIST_FOREACH(ncl, &dev->clocks, node) {
 750         qdev_printf("clock-%s%s \"%s\" freq_hz=%e\n",
 751                     ncl->output ? "out" : "in",
 752                     ncl->alias ? " (alias)" : "",
 753                     ncl->name,
 754                     CLOCK_PERIOD_TO_HZ(1.0 * clock_get(ncl->clock)));
 755     }
 756     class = object_get_class(OBJECT(dev));
 757     do {
 758         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props_, indent);
 759         class = object_class_get_parent(class);
 760     } while (class != object_class_by_name(TYPE_DEVICE));
 761     bus_print_dev(dev->parent_bus, mon, dev, indent);
 762     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 763         qbus_print(mon, child, indent);
 764     }
 765 }
 766
 767 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 768 {
 769     BusChild *kid;
 770
 771     qdev_printf("bus: %s\n", bus->name);
 772     indent += 2;
 773     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 774     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 775         DeviceState *dev = kid->child;
 776         qdev_print(mon, dev, indent);
 777     }
 778 }
 779 #undef qdev_printf
 780
 781 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
 782 {
 783     if (sysbus_get_default())
 784         qbus_print(mon, sysbus_get_default(), 0);
 785 }
 786
 787 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
 788 {
 789     qdev_print_devinfos(true);
 790 }
 791
 792 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
 793 {
 794     QemuOpts *opts;
 795     DeviceState *dev;
 796
 797     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, errp);
 798     if (!opts) {
 799         return;
 800     }
 801     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 802         qemu_opts_del(opts);
 803         return;
 804     }
 805     dev = qdev_device_add(opts, errp);
 806
 807     /*
 808      * Drain all pending RCU callbacks. This is done because
 809      * some bus related operations can delay a device removal
 810      * (in this case this can happen if device is added and then
 811      * removed due to a configuration error)
 812      * to a RCU callback, but user might expect that this interface
 813      * will finish its job completely once qmp command returns result
 814      * to the user
 815      */
 816     drain_call_rcu();
 817
 818     if (!dev) {
 819         qemu_opts_del(opts);
 820         return;
 821     }
 822     object_unref(OBJECT(dev));
 823 }
 824
 825 static DeviceState *find_device_state(const char *id, Error **errp)
 826 {
 827     Object *obj;
 828
 829     if (id[0] == '/') {
 830         obj = object_resolve_path(id, NULL);
 831     } else {
 832         char *root_path = object_get_canonical_path(qdev_get_peripheral());
 833         char *path = g_strdup_printf("%s/%s", root_path, id);
 834
 835         g_free(root_path);
 836         obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 837         g_free(path);
 838     }
 839
 840     if (!obj) {
 841         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 842                   "Device '%s' not found", id);
 843         return NULL;
 844     }
 845
 846     if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
 847         error_setg(errp, "%s is not a hotpluggable device", id);
 848         return NULL;
 849     }
 850
 851     return DEVICE(obj);
 852 }
 853
 854 void qdev_unplug(DeviceState *dev, Error **errp)
 855 {
 856     DeviceClass *dc = DEVICE_GET_CLASS(dev);
 857     HotplugHandler *hotplug_ctrl;
 858     HotplugHandlerClass *hdc;
 859     Error *local_err = NULL;
 860
 861     if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
 862         error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
 863         return;
 864     }
 865
 866     if (!dc->hotpluggable) {
 867         error_setg(errp, QERR_DEVICE_NO_HOTPLUG,
 868                    object_get_typename(OBJECT(dev)));
 869         return;
 870     }
 871
 872     if (!migration_is_idle() && !dev->allow_unplug_during_migration) {
 873         error_setg(errp, "device_del not allowed while migrating");
 874         return;
 875     }
 876
 877     qdev_hot_removed = true;
 878
 879     hotplug_ctrl = qdev_get_hotplug_handler(dev);
 880     /* hotpluggable device MUST have HotplugHandler, if it doesn't
 881      * then something is very wrong with it */
 882     g_assert(hotplug_ctrl);
 883
 884     /* If device supports async unplug just request it to be done,
 885      * otherwise just remove it synchronously */
 886     hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
 887     if (hdc->unplug_request) {
 888         hotplug_handler_unplug_request(hotplug_ctrl, dev, &local_err);
 889     } else {
 890         hotplug_handler_unplug(hotplug_ctrl, dev, &local_err);
 891         if (!local_err) {
 892             object_unparent(OBJECT(dev));
 893         }
 894     }
 895     error_propagate(errp, local_err);
 896 }
 897
 898 void qmp_device_del(const char *id, Error **errp)
 899 {
 900     DeviceState *dev = find_device_state(id, errp);
 901     if (dev != NULL) {
 902         if (dev->pending_deleted_event) {
 903             error_setg(errp, "Device %s is already in the "
 904                              "process of unplug", id);
 905             return;
 906         }
 907
 908         qdev_unplug(dev, errp);
 909     }
 910 }
 911
 912 void hmp_device_add(Monitor *mon, const QDict *qdict)
 913 {
 914     Error *err = NULL;
 915
 916     qmp_device_add((QDict *)qdict, NULL, &err);
 917     hmp_handle_error(mon, err);
 918 }
 919
 920 void hmp_device_del(Monitor *mon, const QDict *qdict)
 921 {
 922     const char *id = qdict_get_str(qdict, "id");
 923     Error *err = NULL;
 924
 925     qmp_device_del(id, &err);
 926     hmp_handle_error(mon, err);
 927 }
 928
 929 BlockBackend *blk_by_qdev_id(const char *id, Error **errp)
 930 {
 931     DeviceState *dev;
 932     BlockBackend *blk;
 933
 934     dev = find_device_state(id, errp);
 935     if (dev == NULL) {
 936         return NULL;
 937     }
 938
 939     blk = blk_by_dev(dev);
 940     if (!blk) {
 941         error_setg(errp, "Device does not have a block device backend");
 942     }
 943     return blk;
 944 }
 945
 946 void qdev_machine_init(void)
 947 {
 948     qdev_get_peripheral_anon();
 949     qdev_get_peripheral();
 950 }
 951
 952 QemuOptsList qemu_device_opts = {
 953     .name = "device",
 954     .implied_opt_name = "driver",
 955     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 956     .desc = {
 957         /*
 958          * no elements => accept any
 959          * sanity checking will happen later
 960          * when setting device properties
 961          */
 962         { /* end of list */ }
 963     },
 964 };
 965
 966 QemuOptsList qemu_global_opts = {
 967     .name = "global",
 968     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 969     .desc = {
 970         {
 971             .name = "driver",
 972             .type = QEMU_OPT_STRING,
 973         },{
 974             .name = "property",
 975             .type = QEMU_OPT_STRING,
 976         },{
 977             .name = "value",
 978             .type = QEMU_OPT_STRING,
 979         },
 980         { /* end of list */ }
 981     },
 982 };
 983
 984 int qemu_global_option(const char *str)
 985 {
 986     char driver[64], property[64];
 987     QemuOpts *opts;
 988     int rc, offset;
 989
 990     rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
 991     if (rc == 2 && str[offset] == '=') {
 992         opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 993         qemu_opt_set(opts, "driver", driver, &error_abort);
 994         qemu_opt_set(opts, "property", property, &error_abort);
 995         qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
 996         return 0;
 997     }
 998
 999     opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
1000     if (!opts) {
1001         return -1;
1002     }
1003
1004     return 0;
1005 }