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