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