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     { "e1000", "e1000-82540em" },
  57     { "ich9-ahci", "ahci" },
  58     { "lsi53c895a", "lsi" },
  59     { "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_S390X },
  60     { "virtio-9p-pci", "virtio-9p", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  61     { "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_S390X },
  62     { "virtio-balloon-pci", "virtio-balloon",
  63             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  64     { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
  65     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  66     { "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_S390X },
  67     { "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  68     { "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_S390X },
  69     { "virtio-input-host-pci", "virtio-input-host",
  70             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  71     { "virtio-iommu-pci", "virtio-iommu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  72     { "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_S390X },
  73     { "virtio-keyboard-pci", "virtio-keyboard",
  74             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  75     { "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_S390X },
  76     { "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  77     { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
  78     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  79     { "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_S390X },
  80     { "virtio-rng-pci", "virtio-rng", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  81     { "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_S390X },
  82     { "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  83     { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
  84     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  85     { "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_S390X },
  86     { "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  87     { }
  88 };
  89
  90 static const char *qdev_class_get_alias(DeviceClass *dc)
  91 {
  92     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  93     int i;
  94
  95     for (i = 0; qdev_alias_table[i].typename; i++) {
  96         if (qdev_alias_table[i].arch_mask &&
  97             !(qdev_alias_table[i].arch_mask & arch_type)) {
  98             continue;
  99         }
 100
 101         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
 102             return qdev_alias_table[i].alias;
 103         }
 104     }
 105
 106     return NULL;
 107 }
 108
 109 static bool qdev_class_has_alias(DeviceClass *dc)
 110 {
 111     return (qdev_class_get_alias(dc) != NULL);
 112 }
 113
 114 static void qdev_print_devinfo(DeviceClass *dc)
 115 {
 116     qemu_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
 117     if (dc->bus_type) {
 118         qemu_printf(", bus %s", dc->bus_type);
 119     }
 120     if (qdev_class_has_alias(dc)) {
 121         qemu_printf(", alias \"%s\"", qdev_class_get_alias(dc));
 122     }
 123     if (dc->desc) {
 124         qemu_printf(", desc \"%s\"", dc->desc);
 125     }
 126     if (!dc->user_creatable) {
 127         qemu_printf(", no-user");
 128     }
 129     qemu_printf("\n");
 130 }
 131
 132 static void qdev_print_devinfos(bool show_no_user)
 133 {
 134     static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
 135         [DEVICE_CATEGORY_BRIDGE]  = "Controller/Bridge/Hub",
 136         [DEVICE_CATEGORY_USB]     = "USB",
 137         [DEVICE_CATEGORY_STORAGE] = "Storage",
 138         [DEVICE_CATEGORY_NETWORK] = "Network",
 139         [DEVICE_CATEGORY_INPUT]   = "Input",
 140         [DEVICE_CATEGORY_DISPLAY] = "Display",
 141         [DEVICE_CATEGORY_SOUND]   = "Sound",
 142         [DEVICE_CATEGORY_MISC]    = "Misc",
 143         [DEVICE_CATEGORY_CPU]     = "CPU",
 144         [DEVICE_CATEGORY_MAX]     = "Uncategorized",
 145     };
 146     GSList *list, *elt;
 147     int i;
 148     bool cat_printed;
 149
 150     module_load_qom_all();
 151     list = object_class_get_list_sorted(TYPE_DEVICE, false);
 152
 153     for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
 154         cat_printed = false;
 155         for (elt = list; elt; elt = elt->next) {
 156             DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
 157                                                  TYPE_DEVICE);
 158             if ((i < DEVICE_CATEGORY_MAX
 159                  ? !test_bit(i, dc->categories)
 160                  : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
 161                 || (!show_no_user
 162                     && !dc->user_creatable)) {
 163                 continue;
 164             }
 165             if (!cat_printed) {
 166                 qemu_printf("%s%s devices:\n", i ? "\n" : "", cat_name[i]);
 167                 cat_printed = true;
 168             }
 169             qdev_print_devinfo(dc);
 170         }
 171     }
 172
 173     g_slist_free(list);
 174 }
 175
 176 static int set_property(void *opaque, const char *name, const char *value,
 177                         Error **errp)
 178 {
 179     Object *obj = opaque;
 180     Error *err = NULL;
 181
 182     if (strcmp(name, "driver") == 0)
 183         return 0;
 184     if (strcmp(name, "bus") == 0)
 185         return 0;
 186
 187     object_property_parse(obj, value, name, &err);
 188     if (err != NULL) {
 189         error_propagate(errp, err);
 190         return -1;
 191     }
 192     return 0;
 193 }
 194
 195 static const char *find_typename_by_alias(const char *alias)
 196 {
 197     int i;
 198
 199     for (i = 0; qdev_alias_table[i].alias; i++) {
 200         if (qdev_alias_table[i].arch_mask &&
 201             !(qdev_alias_table[i].arch_mask & arch_type)) {
 202             continue;
 203         }
 204
 205         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 206             return qdev_alias_table[i].typename;
 207         }
 208     }
 209
 210     return NULL;
 211 }
 212
 213 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
 214 {
 215     ObjectClass *oc;
 216     DeviceClass *dc;
 217     const char *original_name = *driver;
 218
 219     oc = module_object_class_by_name(*driver);
 220     if (!oc) {
 221         const char *typename = find_typename_by_alias(*driver);
 222
 223         if (typename) {
 224             *driver = typename;
 225             oc = module_object_class_by_name(*driver);
 226         }
 227     }
 228
 229     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 230         if (*driver != original_name) {
 231             error_setg(errp, "'%s' (alias '%s') is not a valid device model"
 232                        " name", original_name, *driver);
 233         } else {
 234             error_setg(errp, "'%s' is not a valid device model name", *driver);
 235         }
 236         return NULL;
 237     }
 238
 239     if (object_class_is_abstract(oc)) {
 240         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 241                    "non-abstract device type");
 242         return NULL;
 243     }
 244
 245     dc = DEVICE_CLASS(oc);
 246     if (!dc->user_creatable ||
 247         (qdev_hotplug && !dc->hotpluggable)) {
 248         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 249                    "pluggable device type");
 250         return NULL;
 251     }
 252
 253     return dc;
 254 }
 255
 256
 257 int qdev_device_help(QemuOpts *opts)
 258 {
 259     Error *local_err = NULL;
 260     const char *driver;
 261     ObjectPropertyInfoList *prop_list;
 262     ObjectPropertyInfoList *prop;
 263     GPtrArray *array;
 264     int i;
 265
 266     driver = qemu_opt_get(opts, "driver");
 267     if (driver && is_help_option(driver)) {
 268         qdev_print_devinfos(false);
 269         return 1;
 270     }
 271
 272     if (!driver || !qemu_opt_has_help_opt(opts)) {
 273         return 0;
 274     }
 275
 276     if (!object_class_by_name(driver)) {
 277         const char *typename = find_typename_by_alias(driver);
 278
 279         if (typename) {
 280             driver = typename;
 281         }
 282     }
 283
 284     prop_list = qmp_device_list_properties(driver, &local_err);
 285     if (local_err) {
 286         goto error;
 287     }
 288
 289     if (prop_list) {
 290         qemu_printf("%s options:\n", driver);
 291     } else {
 292         qemu_printf("There are no options for %s.\n", driver);
 293     }
 294     array = g_ptr_array_new();
 295     for (prop = prop_list; prop; prop = prop->next) {
 296         g_ptr_array_add(array,
 297                         object_property_help(prop->value->name,
 298                                              prop->value->type,
 299                                              prop->value->default_value,
 300                                              prop->value->description));
 301     }
 302     g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0);
 303     for (i = 0; i < array->len; i++) {
 304         printf("%s\n", (char *)array->pdata[i]);
 305     }
 306     g_ptr_array_set_free_func(array, g_free);
 307     g_ptr_array_free(array, true);
 308     qapi_free_ObjectPropertyInfoList(prop_list);
 309     return 1;
 310
 311 error:
 312     error_report_err(local_err);
 313     return 1;
 314 }
 315
 316 static Object *qdev_get_peripheral(void)
 317 {
 318     static Object *dev;
 319
 320     if (dev == NULL) {
 321         dev = container_get(qdev_get_machine(), "/peripheral");
 322     }
 323
 324     return dev;
 325 }
 326
 327 static Object *qdev_get_peripheral_anon(void)
 328 {
 329     static Object *dev;
 330
 331     if (dev == NULL) {
 332         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 333     }
 334
 335     return dev;
 336 }
 337
 338 static void qbus_error_append_bus_list_hint(DeviceState *dev,
 339                                             Error *const *errp)
 340 {
 341     BusState *child;
 342     const char *sep = " ";
 343
 344     error_append_hint(errp, "child buses at \"%s\":",
 345                       dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 346     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 347         error_append_hint(errp, "%s\"%s\"", sep, child->name);
 348         sep = ", ";
 349     }
 350     error_append_hint(errp, "\n");
 351 }
 352
 353 static void qbus_error_append_dev_list_hint(BusState *bus,
 354                                             Error *const *errp)
 355 {
 356     BusChild *kid;
 357     const char *sep = " ";
 358
 359     error_append_hint(errp, "devices at \"%s\":", bus->name);
 360     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 361         DeviceState *dev = kid->child;
 362         error_append_hint(errp, "%s\"%s\"", sep,
 363                           object_get_typename(OBJECT(dev)));
 364         if (dev->id) {
 365             error_append_hint(errp, "/\"%s\"", dev->id);
 366         }
 367         sep = ", ";
 368     }
 369     error_append_hint(errp, "\n");
 370 }
 371
 372 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 373 {
 374     BusState *child;
 375
 376     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 377         if (strcmp(child->name, elem) == 0) {
 378             return child;
 379         }
 380     }
 381     return NULL;
 382 }
 383
 384 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 385 {
 386     BusChild *kid;
 387
 388     /*
 389      * try to match in order:
 390      *   (1) instance id, if present
 391      *   (2) driver name
 392      *   (3) driver alias, if present
 393      */
 394     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 395         DeviceState *dev = kid->child;
 396         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 397             return dev;
 398         }
 399     }
 400     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 401         DeviceState *dev = kid->child;
 402         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 403             return dev;
 404         }
 405     }
 406     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 407         DeviceState *dev = kid->child;
 408         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 409
 410         if (qdev_class_has_alias(dc) &&
 411             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 412             return dev;
 413         }
 414     }
 415     return NULL;
 416 }
 417
 418 static inline bool qbus_is_full(BusState *bus)
 419 {
 420     BusClass *bus_class = BUS_GET_CLASS(bus);
 421     return bus_class->max_dev && bus->num_children >= bus_class->max_dev;
 422 }
 423
 424 /*
 425  * Search the tree rooted at @bus for a bus.
 426  * If @name, search for a bus with that name.  Note that bus names
 427  * need not be unique.  Yes, that's screwed up.
 428  * Else search for a bus that is a subtype of @bus_typename.
 429  * If more than one exists, prefer one that can take another device.
 430  * Return the bus if found, else %NULL.
 431  */
 432 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 433                                      const char *bus_typename)
 434 {
 435     BusChild *kid;
 436     BusState *pick, *child, *ret;
 437     bool match;
 438
 439     assert(name || bus_typename);
 440     if (name) {
 441         match = !strcmp(bus->name, name);
 442     } else {
 443         match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
 444     }
 445
 446     if (match && !qbus_is_full(bus)) {
 447         return bus;             /* root matches and isn't full */
 448     }
 449
 450     pick = match ? bus : NULL;
 451
 452     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 453         DeviceState *dev = kid->child;
 454         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 455             ret = qbus_find_recursive(child, name, bus_typename);
 456             if (ret && !qbus_is_full(ret)) {
 457                 return ret;     /* a descendant matches and isn't full */
 458             }
 459             if (ret && !pick) {
 460                 pick = ret;
 461             }
 462         }
 463     }
 464
 465     /* root or a descendant matches, but is full */
 466     return pick;
 467 }
 468
 469 static BusState *qbus_find(const char *path, Error **errp)
 470 {
 471     DeviceState *dev;
 472     BusState *bus;
 473     char elem[128];
 474     int pos, len;
 475
 476     /* find start element */
 477     if (path[0] == '/') {
 478         bus = sysbus_get_default();
 479         pos = 0;
 480     } else {
 481         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 482             assert(!path[0]);
 483             elem[0] = len = 0;
 484         }
 485         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 486         if (!bus) {
 487             error_setg(errp, "Bus '%s' not found", elem);
 488             return NULL;
 489         }
 490         pos = len;
 491     }
 492
 493     for (;;) {
 494         assert(path[pos] == '/' || !path[pos]);
 495         while (path[pos] == '/') {
 496             pos++;
 497         }
 498         if (path[pos] == '\0') {
 499             break;
 500         }
 501
 502         /* find device */
 503         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 504             g_assert_not_reached();
 505             elem[0] = len = 0;
 506         }
 507         pos += len;
 508         dev = qbus_find_dev(bus, elem);
 509         if (!dev) {
 510             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 511                       "Device '%s' not found", elem);
 512             qbus_error_append_dev_list_hint(bus, errp);
 513             return NULL;
 514         }
 515
 516         assert(path[pos] == '/' || !path[pos]);
 517         while (path[pos] == '/') {
 518             pos++;
 519         }
 520         if (path[pos] == '\0') {
 521             /* last specified element is a device.  If it has exactly
 522              * one child bus accept it nevertheless */
 523             if (dev->num_child_bus == 1) {
 524                 bus = QLIST_FIRST(&dev->child_bus);
 525                 break;
 526             }
 527             if (dev->num_child_bus) {
 528                 error_setg(errp, "Device '%s' has multiple child buses",
 529                            elem);
 530                 qbus_error_append_bus_list_hint(dev, errp);
 531             } else {
 532                 error_setg(errp, "Device '%s' has no child bus", elem);
 533             }
 534             return NULL;
 535         }
 536
 537         /* find bus */
 538         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 539             g_assert_not_reached();
 540             elem[0] = len = 0;
 541         }
 542         pos += len;
 543         bus = qbus_find_bus(dev, elem);
 544         if (!bus) {
 545             error_setg(errp, "Bus '%s' not found", elem);
 546             qbus_error_append_bus_list_hint(dev, errp);
 547             return NULL;
 548         }
 549     }
 550
 551     if (qbus_is_full(bus)) {
 552         error_setg(errp, "Bus '%s' is full", path);
 553         return NULL;
 554     }
 555     return bus;
 556 }
 557
 558 void qdev_set_id(DeviceState *dev, const char *id)
 559 {
 560     if (id) {
 561         dev->id = id;
 562     }
 563
 564     if (dev->id) {
 565         object_property_add_child(qdev_get_peripheral(), dev->id,
 566                                   OBJECT(dev));
 567     } else {
 568         static int anon_count;
 569         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 570         object_property_add_child(qdev_get_peripheral_anon(), name,
 571                                   OBJECT(dev));
 572         g_free(name);
 573     }
 574 }
 575
 576 static int is_failover_device(void *opaque, const char *name, const char *value,
 577                         Error **errp)
 578 {
 579     if (strcmp(name, "failover_pair_id") == 0) {
 580         QemuOpts *opts = (QemuOpts *)opaque;
 581
 582         if (qdev_should_hide_device(opts)) {
 583             return 1;
 584         }
 585     }
 586
 587     return 0;
 588 }
 589
 590 static bool should_hide_device(QemuOpts *opts)
 591 {
 592     if (qemu_opt_foreach(opts, is_failover_device, opts, NULL) == 0) {
 593         return false;
 594     }
 595     return true;
 596 }
 597
 598 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 599 {
 600     DeviceClass *dc;
 601     const char *driver, *path;
 602     DeviceState *dev = NULL;
 603     BusState *bus = NULL;
 604     Error *err = NULL;
 605     bool hide;
 606
 607     driver = qemu_opt_get(opts, "driver");
 608     if (!driver) {
 609         error_setg(errp, QERR_MISSING_PARAMETER, "driver");
 610         return NULL;
 611     }
 612
 613     /* find driver */
 614     dc = qdev_get_device_class(&driver, errp);
 615     if (!dc) {
 616         return NULL;
 617     }
 618
 619     /* find bus */
 620     path = qemu_opt_get(opts, "bus");
 621     if (path != NULL) {
 622         bus = qbus_find(path, errp);
 623         if (!bus) {
 624             return NULL;
 625         }
 626         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 627             error_setg(errp, "Device '%s' can't go on %s bus",
 628                        driver, object_get_typename(OBJECT(bus)));
 629             return NULL;
 630         }
 631     } else if (dc->bus_type != NULL) {
 632         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 633         if (!bus || qbus_is_full(bus)) {
 634             error_setg(errp, "No '%s' bus found for device '%s'",
 635                        dc->bus_type, driver);
 636             return NULL;
 637         }
 638     }
 639     hide = should_hide_device(opts);
 640
 641     if ((hide || qdev_hotplug) && bus && !qbus_is_hotpluggable(bus)) {
 642         error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
 643         return NULL;
 644     }
 645
 646     if (hide) {
 647         return NULL;
 648     }
 649
 650     if (!migration_is_idle()) {
 651         error_setg(errp, "device_add not allowed while migrating");
 652         return NULL;
 653     }
 654
 655     /* create device */
 656     dev = qdev_new(driver);
 657
 658     /* Check whether the hotplug is allowed by the machine */
 659     if (qdev_hotplug && !qdev_hotplug_allowed(dev, &err)) {
 660         /* Error must be set in the machine hook */
 661         assert(err);
 662         goto err_del_dev;
 663     }
 664
 665     if (!bus && qdev_hotplug && !qdev_get_machine_hotplug_handler(dev)) {
 666         /* No bus, no machine hotplug handler --> device is not hotpluggable */
 667         error_setg(&err, "Device '%s' can not be hotplugged on this machine",
 668                    driver);
 669         goto err_del_dev;
 670     }
 671
 672     qdev_set_id(dev, qemu_opts_id(opts));
 673
 674     /* set properties */
 675     if (qemu_opt_foreach(opts, set_property, dev, &err)) {
 676         goto err_del_dev;
 677     }
 678
 679     dev->opts = opts;
 680     qdev_realize(DEVICE(dev), bus, &err);
 681     if (err != NULL) {
 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, &local_err);
 805     if (local_err) {
 806         error_propagate(errp, local_err);
 807         return;
 808     }
 809     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 810         qemu_opts_del(opts);
 811         return;
 812     }
 813     dev = qdev_device_add(opts, &local_err);
 814     if (!dev) {
 815         error_propagate(errp, local_err);
 816         qemu_opts_del(opts);
 817         return;
 818     }
 819     object_unref(OBJECT(dev));
 820 }
 821
 822 static DeviceState *find_device_state(const char *id, Error **errp)
 823 {
 824     Object *obj;
 825
 826     if (id[0] == '/') {
 827         obj = object_resolve_path(id, NULL);
 828     } else {
 829         char *root_path = object_get_canonical_path(qdev_get_peripheral());
 830         char *path = g_strdup_printf("%s/%s", root_path, id);
 831
 832         g_free(root_path);
 833         obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 834         g_free(path);
 835     }
 836
 837     if (!obj) {
 838         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 839                   "Device '%s' not found", id);
 840         return NULL;
 841     }
 842
 843     if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
 844         error_setg(errp, "%s is not a hotpluggable device", id);
 845         return NULL;
 846     }
 847
 848     return DEVICE(obj);
 849 }
 850
 851 void qdev_unplug(DeviceState *dev, Error **errp)
 852 {
 853     DeviceClass *dc = DEVICE_GET_CLASS(dev);
 854     HotplugHandler *hotplug_ctrl;
 855     HotplugHandlerClass *hdc;
 856     Error *local_err = NULL;
 857
 858     if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
 859         error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
 860         return;
 861     }
 862
 863     if (!dc->hotpluggable) {
 864         error_setg(errp, QERR_DEVICE_NO_HOTPLUG,
 865                    object_get_typename(OBJECT(dev)));
 866         return;
 867     }
 868
 869     if (!migration_is_idle() && !dev->allow_unplug_during_migration) {
 870         error_setg(errp, "device_del not allowed while migrating");
 871         return;
 872     }
 873
 874     qdev_hot_removed = true;
 875
 876     hotplug_ctrl = qdev_get_hotplug_handler(dev);
 877     /* hotpluggable device MUST have HotplugHandler, if it doesn't
 878      * then something is very wrong with it */
 879     g_assert(hotplug_ctrl);
 880
 881     /* If device supports async unplug just request it to be done,
 882      * otherwise just remove it synchronously */
 883     hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
 884     if (hdc->unplug_request) {
 885         hotplug_handler_unplug_request(hotplug_ctrl, dev, &local_err);
 886     } else {
 887         hotplug_handler_unplug(hotplug_ctrl, dev, &local_err);
 888         if (!local_err) {
 889             object_unparent(OBJECT(dev));
 890         }
 891     }
 892     error_propagate(errp, local_err);
 893 }
 894
 895 void qmp_device_del(const char *id, Error **errp)
 896 {
 897     DeviceState *dev = find_device_state(id, errp);
 898     if (dev != NULL) {
 899         if (dev->pending_deleted_event) {
 900             error_setg(errp, "Device %s is already in the "
 901                              "process of unplug", id);
 902             return;
 903         }
 904
 905         qdev_unplug(dev, errp);
 906     }
 907 }
 908
 909 void hmp_device_add(Monitor *mon, const QDict *qdict)
 910 {
 911     Error *err = NULL;
 912
 913     qmp_device_add((QDict *)qdict, NULL, &err);
 914     hmp_handle_error(mon, err);
 915 }
 916
 917 void hmp_device_del(Monitor *mon, const QDict *qdict)
 918 {
 919     const char *id = qdict_get_str(qdict, "id");
 920     Error *err = NULL;
 921
 922     qmp_device_del(id, &err);
 923     hmp_handle_error(mon, err);
 924 }
 925
 926 BlockBackend *blk_by_qdev_id(const char *id, Error **errp)
 927 {
 928     DeviceState *dev;
 929     BlockBackend *blk;
 930
 931     dev = find_device_state(id, errp);
 932     if (dev == NULL) {
 933         return NULL;
 934     }
 935
 936     blk = blk_by_dev(dev);
 937     if (!blk) {
 938         error_setg(errp, "Device does not have a block device backend");
 939     }
 940     return blk;
 941 }
 942
 943 void qdev_machine_init(void)
 944 {
 945     qdev_get_peripheral_anon();
 946     qdev_get_peripheral();
 947 }
 948
 949 QemuOptsList qemu_device_opts = {
 950     .name = "device",
 951     .implied_opt_name = "driver",
 952     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 953     .desc = {
 954         /*
 955          * no elements => accept any
 956          * sanity checking will happen later
 957          * when setting device properties
 958          */
 959         { /* end of list */ }
 960     },
 961 };
 962
 963 QemuOptsList qemu_global_opts = {
 964     .name = "global",
 965     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 966     .desc = {
 967         {
 968             .name = "driver",
 969             .type = QEMU_OPT_STRING,
 970         },{
 971             .name = "property",
 972             .type = QEMU_OPT_STRING,
 973         },{
 974             .name = "value",
 975             .type = QEMU_OPT_STRING,
 976         },
 977         { /* end of list */ }
 978     },
 979 };
 980
 981 int qemu_global_option(const char *str)
 982 {
 983     char driver[64], property[64];
 984     QemuOpts *opts;
 985     int rc, offset;
 986
 987     rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
 988     if (rc == 2 && str[offset] == '=') {
 989         opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 990         qemu_opt_set(opts, "driver", driver, &error_abort);
 991         qemu_opt_set(opts, "property", property, &error_abort);
 992         qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
 993         return 0;
 994     }
 995
 996     opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
 997     if (!opts) {
 998         return -1;
 999     }
1000
1001     return 0;
1002 }