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 "qemu/qemu-print.h"
  35 #include "sysemu/block-backend.h"
  36 #include "migration/misc.h"
  37
  38 /*
  39  * Aliases were a bad idea from the start.  Let's keep them
  40  * from spreading further.
  41  */
  42 typedef struct QDevAlias
  43 {
  44     const char *typename;
  45     const char *alias;
  46     uint32_t arch_mask;
  47 } QDevAlias;
  48
  49 /* Please keep this table sorted by typename. */
  50 static const QDevAlias qdev_alias_table[] = {
  51     { "e1000", "e1000-82540em" },
  52     { "ich9-ahci", "ahci" },
  53     { "lsi53c895a", "lsi" },
  54     { "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_S390X },
  55     { "virtio-9p-pci", "virtio-9p", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  56     { "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_S390X },
  57     { "virtio-balloon-pci", "virtio-balloon",
  58             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  59     { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
  60     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  61     { "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_S390X },
  62     { "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  63     { "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_S390X },
  64     { "virtio-input-host-pci", "virtio-input-host",
  65             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  66     { "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_S390X },
  67     { "virtio-keyboard-pci", "virtio-keyboard",
  68             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  69     { "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_S390X },
  70     { "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  71     { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
  72     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  73     { "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_S390X },
  74     { "virtio-rng-pci", "virtio-rng", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  75     { "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_S390X },
  76     { "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  77     { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
  78     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  79     { "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_S390X },
  80     { "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  81     { }
  82 };
  83
  84 static const char *qdev_class_get_alias(DeviceClass *dc)
  85 {
  86     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  87     int i;
  88
  89     for (i = 0; qdev_alias_table[i].typename; i++) {
  90         if (qdev_alias_table[i].arch_mask &&
  91             !(qdev_alias_table[i].arch_mask & arch_type)) {
  92             continue;
  93         }
  94
  95         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
  96             return qdev_alias_table[i].alias;
  97         }
  98     }
  99
 100     return NULL;
 101 }
 102
 103 static bool qdev_class_has_alias(DeviceClass *dc)
 104 {
 105     return (qdev_class_get_alias(dc) != NULL);
 106 }
 107
 108 static void qdev_print_devinfo(DeviceClass *dc)
 109 {
 110     qemu_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
 111     if (dc->bus_type) {
 112         qemu_printf(", bus %s", dc->bus_type);
 113     }
 114     if (qdev_class_has_alias(dc)) {
 115         qemu_printf(", alias \"%s\"", qdev_class_get_alias(dc));
 116     }
 117     if (dc->desc) {
 118         qemu_printf(", desc \"%s\"", dc->desc);
 119     }
 120     if (!dc->user_creatable) {
 121         qemu_printf(", no-user");
 122     }
 123     qemu_printf("\n");
 124 }
 125
 126 static void qdev_print_devinfos(bool show_no_user)
 127 {
 128     static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
 129         [DEVICE_CATEGORY_BRIDGE]  = "Controller/Bridge/Hub",
 130         [DEVICE_CATEGORY_USB]     = "USB",
 131         [DEVICE_CATEGORY_STORAGE] = "Storage",
 132         [DEVICE_CATEGORY_NETWORK] = "Network",
 133         [DEVICE_CATEGORY_INPUT]   = "Input",
 134         [DEVICE_CATEGORY_DISPLAY] = "Display",
 135         [DEVICE_CATEGORY_SOUND]   = "Sound",
 136         [DEVICE_CATEGORY_MISC]    = "Misc",
 137         [DEVICE_CATEGORY_CPU]     = "CPU",
 138         [DEVICE_CATEGORY_MAX]     = "Uncategorized",
 139     };
 140     GSList *list, *elt;
 141     int i;
 142     bool cat_printed;
 143
 144     list = object_class_get_list_sorted(TYPE_DEVICE, false);
 145
 146     for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
 147         cat_printed = false;
 148         for (elt = list; elt; elt = elt->next) {
 149             DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
 150                                                  TYPE_DEVICE);
 151             if ((i < DEVICE_CATEGORY_MAX
 152                  ? !test_bit(i, dc->categories)
 153                  : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
 154                 || (!show_no_user
 155                     && !dc->user_creatable)) {
 156                 continue;
 157             }
 158             if (!cat_printed) {
 159                 qemu_printf("%s%s devices:\n", i ? "\n" : "", cat_name[i]);
 160                 cat_printed = true;
 161             }
 162             qdev_print_devinfo(dc);
 163         }
 164     }
 165
 166     g_slist_free(list);
 167 }
 168
 169 static int set_property(void *opaque, const char *name, const char *value,
 170                         Error **errp)
 171 {
 172     Object *obj = opaque;
 173     Error *err = NULL;
 174
 175     if (strcmp(name, "driver") == 0)
 176         return 0;
 177     if (strcmp(name, "bus") == 0)
 178         return 0;
 179
 180     object_property_parse(obj, value, name, &err);
 181     if (err != NULL) {
 182         error_propagate(errp, err);
 183         return -1;
 184     }
 185     return 0;
 186 }
 187
 188 static const char *find_typename_by_alias(const char *alias)
 189 {
 190     int i;
 191
 192     for (i = 0; qdev_alias_table[i].alias; i++) {
 193         if (qdev_alias_table[i].arch_mask &&
 194             !(qdev_alias_table[i].arch_mask & arch_type)) {
 195             continue;
 196         }
 197
 198         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 199             return qdev_alias_table[i].typename;
 200         }
 201     }
 202
 203     return NULL;
 204 }
 205
 206 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
 207 {
 208     ObjectClass *oc;
 209     DeviceClass *dc;
 210     const char *original_name = *driver;
 211
 212     oc = object_class_by_name(*driver);
 213     if (!oc) {
 214         const char *typename = find_typename_by_alias(*driver);
 215
 216         if (typename) {
 217             *driver = typename;
 218             oc = object_class_by_name(*driver);
 219         }
 220     }
 221
 222     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 223         if (*driver != original_name) {
 224             error_setg(errp, "'%s' (alias '%s') is not a valid device model"
 225                        " name", original_name, *driver);
 226         } else {
 227             error_setg(errp, "'%s' is not a valid device model name", *driver);
 228         }
 229         return NULL;
 230     }
 231
 232     if (object_class_is_abstract(oc)) {
 233         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 234                    "non-abstract device type");
 235         return NULL;
 236     }
 237
 238     dc = DEVICE_CLASS(oc);
 239     if (!dc->user_creatable ||
 240         (qdev_hotplug && !dc->hotpluggable)) {
 241         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 242                    "pluggable device type");
 243         return NULL;
 244     }
 245
 246     return dc;
 247 }
 248
 249
 250 int qdev_device_help(QemuOpts *opts)
 251 {
 252     Error *local_err = NULL;
 253     const char *driver;
 254     ObjectPropertyInfoList *prop_list;
 255     ObjectPropertyInfoList *prop;
 256
 257     driver = qemu_opt_get(opts, "driver");
 258     if (driver && is_help_option(driver)) {
 259         qdev_print_devinfos(false);
 260         return 1;
 261     }
 262
 263     if (!driver || !qemu_opt_has_help_opt(opts)) {
 264         return 0;
 265     }
 266
 267     if (!object_class_by_name(driver)) {
 268         const char *typename = find_typename_by_alias(driver);
 269
 270         if (typename) {
 271             driver = typename;
 272         }
 273     }
 274
 275     prop_list = qmp_device_list_properties(driver, &local_err);
 276     if (local_err) {
 277         goto error;
 278     }
 279
 280     if (prop_list) {
 281         qemu_printf("%s options:\n", driver);
 282     } else {
 283         qemu_printf("There are no options for %s.\n", driver);
 284     }
 285     for (prop = prop_list; prop; prop = prop->next) {
 286         int len;
 287         qemu_printf("  %s=<%s>%n", prop->value->name, prop->value->type, &len);
 288         if (prop->value->has_description) {
 289             if (len < 24) {
 290                 qemu_printf("%*s", 24 - len, "");
 291             }
 292             qemu_printf(" - %s\n", prop->value->description);
 293         } else {
 294             qemu_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->num_children >= 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     Error *local_err = NULL;
 858
 859     if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
 860         error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
 861         return;
 862     }
 863
 864     if (!dc->hotpluggable) {
 865         error_setg(errp, QERR_DEVICE_NO_HOTPLUG,
 866                    object_get_typename(OBJECT(dev)));
 867         return;
 868     }
 869
 870     if (!migration_is_idle()) {
 871         error_setg(errp, "device_del not allowed while migrating");
 872         return;
 873     }
 874
 875     qdev_hot_removed = true;
 876
 877     hotplug_ctrl = qdev_get_hotplug_handler(dev);
 878     /* hotpluggable device MUST have HotplugHandler, if it doesn't
 879      * then something is very wrong with it */
 880     g_assert(hotplug_ctrl);
 881
 882     /* If device supports async unplug just request it to be done,
 883      * otherwise just remove it synchronously */
 884     hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
 885     if (hdc->unplug_request) {
 886         hotplug_handler_unplug_request(hotplug_ctrl, dev, &local_err);
 887     } else {
 888         hotplug_handler_unplug(hotplug_ctrl, dev, &local_err);
 889         if (!local_err) {
 890             object_unparent(OBJECT(dev));
 891         }
 892     }
 893     error_propagate(errp, local_err);
 894 }
 895
 896 void qmp_device_del(const char *id, Error **errp)
 897 {
 898     DeviceState *dev = find_device_state(id, errp);
 899     if (dev != NULL) {
 900         qdev_unplug(dev, errp);
 901     }
 902 }
 903
 904 BlockBackend *blk_by_qdev_id(const char *id, Error **errp)
 905 {
 906     DeviceState *dev;
 907     BlockBackend *blk;
 908
 909     dev = find_device_state(id, errp);
 910     if (dev == NULL) {
 911         return NULL;
 912     }
 913
 914     blk = blk_by_dev(dev);
 915     if (!blk) {
 916         error_setg(errp, "Device does not have a block device backend");
 917     }
 918     return blk;
 919 }
 920
 921 void qdev_machine_init(void)
 922 {
 923     qdev_get_peripheral_anon();
 924     qdev_get_peripheral();
 925 }
 926
 927 QemuOptsList qemu_device_opts = {
 928     .name = "device",
 929     .implied_opt_name = "driver",
 930     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 931     .desc = {
 932         /*
 933          * no elements => accept any
 934          * sanity checking will happen later
 935          * when setting device properties
 936          */
 937         { /* end of list */ }
 938     },
 939 };
 940
 941 QemuOptsList qemu_global_opts = {
 942     .name = "global",
 943     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 944     .desc = {
 945         {
 946             .name = "driver",
 947             .type = QEMU_OPT_STRING,
 948         },{
 949             .name = "property",
 950             .type = QEMU_OPT_STRING,
 951         },{
 952             .name = "value",
 953             .type = QEMU_OPT_STRING,
 954         },
 955         { /* end of list */ }
 956     },
 957 };
 958
 959 int qemu_global_option(const char *str)
 960 {
 961     char driver[64], property[64];
 962     QemuOpts *opts;
 963     int rc, offset;
 964
 965     rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
 966     if (rc == 2 && str[offset] == '=') {
 967         opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 968         qemu_opt_set(opts, "driver", driver, &error_abort);
 969         qemu_opt_set(opts, "property", property, &error_abort);
 970         qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
 971         return 0;
 972     }
 973
 974     opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
 975     if (!opts) {
 976         return -1;
 977     }
 978
 979     return 0;
 980 }