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 "qmp-commands.h"
  26 #include "sysemu/arch_init.h"
  27 #include "qapi/qmp/qerror.h"
  28 #include "qemu/config-file.h"
  29 #include "qemu/error-report.h"
  30 #include "qemu/help_option.h"
  31 #include "sysemu/block-backend.h"
  32 #include "migration/misc.h"
  33
  34 /*
  35  * Aliases were a bad idea from the start.  Let's keep them
  36  * from spreading further.
  37  */
  38 typedef struct QDevAlias
  39 {
  40     const char *typename;
  41     const char *alias;
  42     uint32_t arch_mask;
  43 } QDevAlias;
  44
  45 /* Please keep this table sorted by typename. */
  46 static const QDevAlias qdev_alias_table[] = {
  47     { "e1000", "e1000-82540em" },
  48     { "ich9-ahci", "ahci" },
  49     { "lsi53c895a", "lsi" },
  50     { "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_S390X },
  51     { "virtio-9p-pci", "virtio-9p", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  52     { "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_S390X },
  53     { "virtio-balloon-pci", "virtio-balloon",
  54             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  55     { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
  56     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  57     { "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_S390X },
  58     { "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  59     { "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_S390X },
  60     { "virtio-input-host-pci", "virtio-input-host",
  61             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  62     { "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_S390X },
  63     { "virtio-keyboard-pci", "virtio-keyboard",
  64             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  65     { "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_S390X },
  66     { "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  67     { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
  68     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  69     { "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_S390X },
  70     { "virtio-rng-pci", "virtio-rng", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  71     { "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_S390X },
  72     { "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  73     { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
  74     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  75     { "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_S390X },
  76     { "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  77     { }
  78 };
  79
  80 static const char *qdev_class_get_alias(DeviceClass *dc)
  81 {
  82     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  83     int i;
  84
  85     for (i = 0; qdev_alias_table[i].typename; i++) {
  86         if (qdev_alias_table[i].arch_mask &&
  87             !(qdev_alias_table[i].arch_mask & arch_type)) {
  88             continue;
  89         }
  90
  91         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
  92             return qdev_alias_table[i].alias;
  93         }
  94     }
  95
  96     return NULL;
  97 }
  98
  99 static bool qdev_class_has_alias(DeviceClass *dc)
 100 {
 101     return (qdev_class_get_alias(dc) != NULL);
 102 }
 103
 104 static void qdev_print_devinfo(DeviceClass *dc)
 105 {
 106     error_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
 107     if (dc->bus_type) {
 108         error_printf(", bus %s", dc->bus_type);
 109     }
 110     if (qdev_class_has_alias(dc)) {
 111         error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
 112     }
 113     if (dc->desc) {
 114         error_printf(", desc \"%s\"", dc->desc);
 115     }
 116     if (!dc->user_creatable) {
 117         error_printf(", no-user");
 118     }
 119     error_printf("\n");
 120 }
 121
 122 static gint devinfo_cmp(gconstpointer a, gconstpointer b)
 123 {
 124     return strcasecmp(object_class_get_name((ObjectClass *)a),
 125                       object_class_get_name((ObjectClass *)b));
 126 }
 127
 128 static void qdev_print_devinfos(bool show_no_user)
 129 {
 130     static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
 131         [DEVICE_CATEGORY_BRIDGE]  = "Controller/Bridge/Hub",
 132         [DEVICE_CATEGORY_USB]     = "USB",
 133         [DEVICE_CATEGORY_STORAGE] = "Storage",
 134         [DEVICE_CATEGORY_NETWORK] = "Network",
 135         [DEVICE_CATEGORY_INPUT]   = "Input",
 136         [DEVICE_CATEGORY_DISPLAY] = "Display",
 137         [DEVICE_CATEGORY_SOUND]   = "Sound",
 138         [DEVICE_CATEGORY_MISC]    = "Misc",
 139         [DEVICE_CATEGORY_CPU]     = "CPU",
 140         [DEVICE_CATEGORY_MAX]     = "Uncategorized",
 141     };
 142     GSList *list, *elt;
 143     int i;
 144     bool cat_printed;
 145
 146     list = g_slist_sort(object_class_get_list(TYPE_DEVICE, false),
 147                         devinfo_cmp);
 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                 error_printf("%s%s devices:\n", i ? "\n" : "",
 163                              cat_name[i]);
 164                 cat_printed = true;
 165             }
 166             qdev_print_devinfo(dc);
 167         }
 168     }
 169
 170     g_slist_free(list);
 171 }
 172
 173 static int set_property(void *opaque, const char *name, const char *value,
 174                         Error **errp)
 175 {
 176     Object *obj = opaque;
 177     Error *err = NULL;
 178
 179     if (strcmp(name, "driver") == 0)
 180         return 0;
 181     if (strcmp(name, "bus") == 0)
 182         return 0;
 183
 184     object_property_parse(obj, value, name, &err);
 185     if (err != NULL) {
 186         error_propagate(errp, err);
 187         return -1;
 188     }
 189     return 0;
 190 }
 191
 192 static const char *find_typename_by_alias(const char *alias)
 193 {
 194     int i;
 195
 196     for (i = 0; qdev_alias_table[i].alias; i++) {
 197         if (qdev_alias_table[i].arch_mask &&
 198             !(qdev_alias_table[i].arch_mask & arch_type)) {
 199             continue;
 200         }
 201
 202         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 203             return qdev_alias_table[i].typename;
 204         }
 205     }
 206
 207     return NULL;
 208 }
 209
 210 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
 211 {
 212     ObjectClass *oc;
 213     DeviceClass *dc;
 214     const char *original_name = *driver;
 215
 216     oc = object_class_by_name(*driver);
 217     if (!oc) {
 218         const char *typename = find_typename_by_alias(*driver);
 219
 220         if (typename) {
 221             *driver = typename;
 222             oc = object_class_by_name(*driver);
 223         }
 224     }
 225
 226     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 227         if (*driver != original_name) {
 228             error_setg(errp, "'%s' (alias '%s') is not a valid device model"
 229                        " name", original_name, *driver);
 230         } else {
 231             error_setg(errp, "'%s' is not a valid device model name", *driver);
 232         }
 233         return NULL;
 234     }
 235
 236     if (object_class_is_abstract(oc)) {
 237         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 238                    "non-abstract device type");
 239         return NULL;
 240     }
 241
 242     dc = DEVICE_CLASS(oc);
 243     if (!dc->user_creatable ||
 244         (qdev_hotplug && !dc->hotpluggable)) {
 245         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 246                    "pluggable device type");
 247         return NULL;
 248     }
 249
 250     return dc;
 251 }
 252
 253
 254 int qdev_device_help(QemuOpts *opts)
 255 {
 256     Error *local_err = NULL;
 257     const char *driver;
 258     DevicePropertyInfoList *prop_list;
 259     DevicePropertyInfoList *prop;
 260
 261     driver = qemu_opt_get(opts, "driver");
 262     if (driver && is_help_option(driver)) {
 263         qdev_print_devinfos(false);
 264         return 1;
 265     }
 266
 267     if (!driver || !qemu_opt_has_help_opt(opts)) {
 268         return 0;
 269     }
 270
 271     if (!object_class_by_name(driver)) {
 272         const char *typename = find_typename_by_alias(driver);
 273
 274         if (typename) {
 275             driver = typename;
 276         }
 277     }
 278
 279     prop_list = qmp_device_list_properties(driver, &local_err);
 280     if (local_err) {
 281         goto error;
 282     }
 283
 284     for (prop = prop_list; prop; prop = prop->next) {
 285         error_printf("%s.%s=%s", driver,
 286                      prop->value->name,
 287                      prop->value->type);
 288         if (prop->value->has_description) {
 289             error_printf(" (%s)\n", prop->value->description);
 290         } else {
 291             error_printf("\n");
 292         }
 293     }
 294
 295     qapi_free_DevicePropertyInfoList(prop_list);
 296     return 1;
 297
 298 error:
 299     error_report_err(local_err);
 300     return 1;
 301 }
 302
 303 static Object *qdev_get_peripheral(void)
 304 {
 305     static Object *dev;
 306
 307     if (dev == NULL) {
 308         dev = container_get(qdev_get_machine(), "/peripheral");
 309     }
 310
 311     return dev;
 312 }
 313
 314 static Object *qdev_get_peripheral_anon(void)
 315 {
 316     static Object *dev;
 317
 318     if (dev == NULL) {
 319         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 320     }
 321
 322     return dev;
 323 }
 324
 325 static void qbus_list_bus(DeviceState *dev, Error **errp)
 326 {
 327     BusState *child;
 328     const char *sep = " ";
 329
 330     error_append_hint(errp, "child buses at \"%s\":",
 331                       dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 332     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 333         error_append_hint(errp, "%s\"%s\"", sep, child->name);
 334         sep = ", ";
 335     }
 336     error_append_hint(errp, "\n");
 337 }
 338
 339 static void qbus_list_dev(BusState *bus, Error **errp)
 340 {
 341     BusChild *kid;
 342     const char *sep = " ";
 343
 344     error_append_hint(errp, "devices at \"%s\":", bus->name);
 345     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 346         DeviceState *dev = kid->child;
 347         error_append_hint(errp, "%s\"%s\"", sep,
 348                           object_get_typename(OBJECT(dev)));
 349         if (dev->id) {
 350             error_append_hint(errp, "/\"%s\"", dev->id);
 351         }
 352         sep = ", ";
 353     }
 354     error_append_hint(errp, "\n");
 355 }
 356
 357 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 358 {
 359     BusState *child;
 360
 361     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 362         if (strcmp(child->name, elem) == 0) {
 363             return child;
 364         }
 365     }
 366     return NULL;
 367 }
 368
 369 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 370 {
 371     BusChild *kid;
 372
 373     /*
 374      * try to match in order:
 375      *   (1) instance id, if present
 376      *   (2) driver name
 377      *   (3) driver alias, if present
 378      */
 379     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 380         DeviceState *dev = kid->child;
 381         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 382             return dev;
 383         }
 384     }
 385     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 386         DeviceState *dev = kid->child;
 387         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 388             return dev;
 389         }
 390     }
 391     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 392         DeviceState *dev = kid->child;
 393         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 394
 395         if (qdev_class_has_alias(dc) &&
 396             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 397             return dev;
 398         }
 399     }
 400     return NULL;
 401 }
 402
 403 static inline bool qbus_is_full(BusState *bus)
 404 {
 405     BusClass *bus_class = BUS_GET_CLASS(bus);
 406     return bus_class->max_dev && bus->max_index >= bus_class->max_dev;
 407 }
 408
 409 /*
 410  * Search the tree rooted at @bus for a bus.
 411  * If @name, search for a bus with that name.  Note that bus names
 412  * need not be unique.  Yes, that's screwed up.
 413  * Else search for a bus that is a subtype of @bus_typename.
 414  * If more than one exists, prefer one that can take another device.
 415  * Return the bus if found, else %NULL.
 416  */
 417 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 418                                      const char *bus_typename)
 419 {
 420     BusChild *kid;
 421     BusState *pick, *child, *ret;
 422     bool match;
 423
 424     assert(name || bus_typename);
 425     if (name) {
 426         match = !strcmp(bus->name, name);
 427     } else {
 428         match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
 429     }
 430
 431     if (match && !qbus_is_full(bus)) {
 432         return bus;             /* root matches and isn't full */
 433     }
 434
 435     pick = match ? bus : NULL;
 436
 437     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 438         DeviceState *dev = kid->child;
 439         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 440             ret = qbus_find_recursive(child, name, bus_typename);
 441             if (ret && !qbus_is_full(ret)) {
 442                 return ret;     /* a descendant matches and isn't full */
 443             }
 444             if (ret && !pick) {
 445                 pick = ret;
 446             }
 447         }
 448     }
 449
 450     /* root or a descendant matches, but is full */
 451     return pick;
 452 }
 453
 454 static BusState *qbus_find(const char *path, Error **errp)
 455 {
 456     DeviceState *dev;
 457     BusState *bus;
 458     char elem[128];
 459     int pos, len;
 460
 461     /* find start element */
 462     if (path[0] == '/') {
 463         bus = sysbus_get_default();
 464         pos = 0;
 465     } else {
 466         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 467             assert(!path[0]);
 468             elem[0] = len = 0;
 469         }
 470         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 471         if (!bus) {
 472             error_setg(errp, "Bus '%s' not found", elem);
 473             return NULL;
 474         }
 475         pos = len;
 476     }
 477
 478     for (;;) {
 479         assert(path[pos] == '/' || !path[pos]);
 480         while (path[pos] == '/') {
 481             pos++;
 482         }
 483         if (path[pos] == '\0') {
 484             break;
 485         }
 486
 487         /* find device */
 488         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 489             g_assert_not_reached();
 490             elem[0] = len = 0;
 491         }
 492         pos += len;
 493         dev = qbus_find_dev(bus, elem);
 494         if (!dev) {
 495             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 496                       "Device '%s' not found", elem);
 497             qbus_list_dev(bus, errp);
 498             return NULL;
 499         }
 500
 501         assert(path[pos] == '/' || !path[pos]);
 502         while (path[pos] == '/') {
 503             pos++;
 504         }
 505         if (path[pos] == '\0') {
 506             /* last specified element is a device.  If it has exactly
 507              * one child bus accept it nevertheless */
 508             if (dev->num_child_bus == 1) {
 509                 bus = QLIST_FIRST(&dev->child_bus);
 510                 break;
 511             }
 512             if (dev->num_child_bus) {
 513                 error_setg(errp, "Device '%s' has multiple child buses",
 514                            elem);
 515                 qbus_list_bus(dev, errp);
 516             } else {
 517                 error_setg(errp, "Device '%s' has no child bus", elem);
 518             }
 519             return NULL;
 520         }
 521
 522         /* find bus */
 523         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 524             g_assert_not_reached();
 525             elem[0] = len = 0;
 526         }
 527         pos += len;
 528         bus = qbus_find_bus(dev, elem);
 529         if (!bus) {
 530             error_setg(errp, "Bus '%s' not found", elem);
 531             qbus_list_bus(dev, errp);
 532             return NULL;
 533         }
 534     }
 535
 536     if (qbus_is_full(bus)) {
 537         error_setg(errp, "Bus '%s' is full", path);
 538         return NULL;
 539     }
 540     return bus;
 541 }
 542
 543 void qdev_set_id(DeviceState *dev, const char *id)
 544 {
 545     if (id) {
 546         dev->id = id;
 547     }
 548
 549     if (dev->id) {
 550         object_property_add_child(qdev_get_peripheral(), dev->id,
 551                                   OBJECT(dev), NULL);
 552     } else {
 553         static int anon_count;
 554         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 555         object_property_add_child(qdev_get_peripheral_anon(), name,
 556                                   OBJECT(dev), NULL);
 557         g_free(name);
 558     }
 559 }
 560
 561 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 562 {
 563     DeviceClass *dc;
 564     const char *driver, *path;
 565     DeviceState *dev;
 566     BusState *bus = NULL;
 567     Error *err = NULL;
 568
 569     driver = qemu_opt_get(opts, "driver");
 570     if (!driver) {
 571         error_setg(errp, QERR_MISSING_PARAMETER, "driver");
 572         return NULL;
 573     }
 574
 575     /* find driver */
 576     dc = qdev_get_device_class(&driver, errp);
 577     if (!dc) {
 578         return NULL;
 579     }
 580
 581     /* find bus */
 582     path = qemu_opt_get(opts, "bus");
 583     if (path != NULL) {
 584         bus = qbus_find(path, errp);
 585         if (!bus) {
 586             return NULL;
 587         }
 588         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 589             error_setg(errp, "Device '%s' can't go on %s bus",
 590                        driver, object_get_typename(OBJECT(bus)));
 591             return NULL;
 592         }
 593     } else if (dc->bus_type != NULL) {
 594         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 595         if (!bus || qbus_is_full(bus)) {
 596             error_setg(errp, "No '%s' bus found for device '%s'",
 597                        dc->bus_type, driver);
 598             return NULL;
 599         }
 600     }
 601     if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
 602         error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
 603         return NULL;
 604     }
 605
 606     if (!migration_is_idle()) {
 607         error_setg(errp, "device_add not allowed while migrating");
 608         return NULL;
 609     }
 610
 611     /* create device */
 612     dev = DEVICE(object_new(driver));
 613
 614     if (bus) {
 615         qdev_set_parent_bus(dev, bus);
 616     }
 617
 618     qdev_set_id(dev, qemu_opts_id(opts));
 619
 620     /* set properties */
 621     if (qemu_opt_foreach(opts, set_property, dev, &err)) {
 622         error_propagate(errp, err);
 623         object_unparent(OBJECT(dev));
 624         object_unref(OBJECT(dev));
 625         return NULL;
 626     }
 627
 628     dev->opts = opts;
 629     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 630     if (err != NULL) {
 631         error_propagate(errp, err);
 632         dev->opts = NULL;
 633         object_unparent(OBJECT(dev));
 634         object_unref(OBJECT(dev));
 635         return NULL;
 636     }
 637     return dev;
 638 }
 639
 640
 641 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 642 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 643
 644 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 645                              int indent)
 646 {
 647     if (!props)
 648         return;
 649     for (; props->name; props++) {
 650         Error *err = NULL;
 651         char *value;
 652         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 653         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 654             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 655         } else {
 656             value = object_property_print(OBJECT(dev), props->name, true, &err);
 657         }
 658         g_free(legacy_name);
 659
 660         if (err) {
 661             error_free(err);
 662             continue;
 663         }
 664         qdev_printf("%s = %s\n", props->name,
 665                     value && *value ? value : "<null>");
 666         g_free(value);
 667     }
 668 }
 669
 670 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 671 {
 672     BusClass *bc = BUS_GET_CLASS(bus);
 673
 674     if (bc->print_dev) {
 675         bc->print_dev(mon, dev, indent);
 676     }
 677 }
 678
 679 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 680 {
 681     ObjectClass *class;
 682     BusState *child;
 683     NamedGPIOList *ngl;
 684
 685     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 686                 dev->id ? dev->id : "");
 687     indent += 2;
 688     QLIST_FOREACH(ngl, &dev->gpios, node) {
 689         if (ngl->num_in) {
 690             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 691                         ngl->num_in);
 692         }
 693         if (ngl->num_out) {
 694             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 695                         ngl->num_out);
 696         }
 697     }
 698     class = object_get_class(OBJECT(dev));
 699     do {
 700         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 701         class = object_class_get_parent(class);
 702     } while (class != object_class_by_name(TYPE_DEVICE));
 703     bus_print_dev(dev->parent_bus, mon, dev, indent);
 704     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 705         qbus_print(mon, child, indent);
 706     }
 707 }
 708
 709 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 710 {
 711     BusChild *kid;
 712
 713     qdev_printf("bus: %s\n", bus->name);
 714     indent += 2;
 715     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 716     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 717         DeviceState *dev = kid->child;
 718         qdev_print(mon, dev, indent);
 719     }
 720 }
 721 #undef qdev_printf
 722
 723 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
 724 {
 725     if (sysbus_get_default())
 726         qbus_print(mon, sysbus_get_default(), 0);
 727 }
 728
 729 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
 730 {
 731     qdev_print_devinfos(true);
 732 }
 733
 734 typedef struct QOMCompositionState {
 735     Monitor *mon;
 736     int indent;
 737 } QOMCompositionState;
 738
 739 static void print_qom_composition(Monitor *mon, Object *obj, int indent);
 740
 741 static int print_qom_composition_child(Object *obj, void *opaque)
 742 {
 743     QOMCompositionState *s = opaque;
 744
 745     print_qom_composition(s->mon, obj, s->indent);
 746
 747     return 0;
 748 }
 749
 750 static void print_qom_composition(Monitor *mon, Object *obj, int indent)
 751 {
 752     QOMCompositionState s = {
 753         .mon = mon,
 754         .indent = indent + 2,
 755     };
 756     char *name;
 757
 758     if (obj == object_get_root()) {
 759         name = g_strdup("");
 760     } else {
 761         name = object_get_canonical_path_component(obj);
 762     }
 763     monitor_printf(mon, "%*s/%s (%s)\n", indent, "", name,
 764                    object_get_typename(obj));
 765     g_free(name);
 766     object_child_foreach(obj, print_qom_composition_child, &s);
 767 }
 768
 769 void hmp_info_qom_tree(Monitor *mon, const QDict *dict)
 770 {
 771     const char *path = qdict_get_try_str(dict, "path");
 772     Object *obj;
 773     bool ambiguous = false;
 774
 775     if (path) {
 776         obj = object_resolve_path(path, &ambiguous);
 777         if (!obj) {
 778             monitor_printf(mon, "Path '%s' could not be resolved.\n", path);
 779             return;
 780         }
 781         if (ambiguous) {
 782             monitor_printf(mon, "Warning: Path '%s' is ambiguous.\n", path);
 783             return;
 784         }
 785     } else {
 786         obj = qdev_get_machine();
 787     }
 788     print_qom_composition(mon, obj, 0);
 789 }
 790
 791 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
 792 {
 793     Error *local_err = NULL;
 794     QemuOpts *opts;
 795     DeviceState *dev;
 796
 797     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 798     if (local_err) {
 799         error_propagate(errp, local_err);
 800         return;
 801     }
 802     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 803         qemu_opts_del(opts);
 804         return;
 805     }
 806     dev = qdev_device_add(opts, &local_err);
 807     if (!dev) {
 808         error_propagate(errp, local_err);
 809         qemu_opts_del(opts);
 810         return;
 811     }
 812     object_unref(OBJECT(dev));
 813 }
 814
 815 static DeviceState *find_device_state(const char *id, Error **errp)
 816 {
 817     Object *obj;
 818
 819     if (id[0] == '/') {
 820         obj = object_resolve_path(id, NULL);
 821     } else {
 822         char *root_path = object_get_canonical_path(qdev_get_peripheral());
 823         char *path = g_strdup_printf("%s/%s", root_path, id);
 824
 825         g_free(root_path);
 826         obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 827         g_free(path);
 828     }
 829
 830     if (!obj) {
 831         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 832                   "Device '%s' not found", id);
 833         return NULL;
 834     }
 835
 836     if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
 837         error_setg(errp, "%s is not a hotpluggable device", id);
 838         return NULL;
 839     }
 840
 841     return DEVICE(obj);
 842 }
 843
 844 void qdev_unplug(DeviceState *dev, Error **errp)
 845 {
 846     DeviceClass *dc = DEVICE_GET_CLASS(dev);
 847     HotplugHandler *hotplug_ctrl;
 848     HotplugHandlerClass *hdc;
 849
 850     if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
 851         error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
 852         return;
 853     }
 854
 855     if (!dc->hotpluggable) {
 856         error_setg(errp, QERR_DEVICE_NO_HOTPLUG,
 857                    object_get_typename(OBJECT(dev)));
 858         return;
 859     }
 860
 861     if (!migration_is_idle()) {
 862         error_setg(errp, "device_del not allowed while migrating");
 863         return;
 864     }
 865
 866     qdev_hot_removed = true;
 867
 868     hotplug_ctrl = qdev_get_hotplug_handler(dev);
 869     /* hotpluggable device MUST have HotplugHandler, if it doesn't
 870      * then something is very wrong with it */
 871     g_assert(hotplug_ctrl);
 872
 873     /* If device supports async unplug just request it to be done,
 874      * otherwise just remove it synchronously */
 875     hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
 876     if (hdc->unplug_request) {
 877         hotplug_handler_unplug_request(hotplug_ctrl, dev, errp);
 878     } else {
 879         hotplug_handler_unplug(hotplug_ctrl, dev, errp);
 880     }
 881 }
 882
 883 void qmp_device_del(const char *id, Error **errp)
 884 {
 885     DeviceState *dev = find_device_state(id, errp);
 886     if (dev != NULL) {
 887         qdev_unplug(dev, errp);
 888     }
 889 }
 890
 891 BlockBackend *blk_by_qdev_id(const char *id, Error **errp)
 892 {
 893     DeviceState *dev;
 894     BlockBackend *blk;
 895
 896     dev = find_device_state(id, errp);
 897     if (dev == NULL) {
 898         return NULL;
 899     }
 900
 901     blk = blk_by_dev(dev);
 902     if (!blk) {
 903         error_setg(errp, "Device does not have a block device backend");
 904     }
 905     return blk;
 906 }
 907
 908 void qdev_machine_init(void)
 909 {
 910     qdev_get_peripheral_anon();
 911     qdev_get_peripheral();
 912 }
 913
 914 QemuOptsList qemu_device_opts = {
 915     .name = "device",
 916     .implied_opt_name = "driver",
 917     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 918     .desc = {
 919         /*
 920          * no elements => accept any
 921          * sanity checking will happen later
 922          * when setting device properties
 923          */
 924         { /* end of list */ }
 925     },
 926 };
 927
 928 QemuOptsList qemu_global_opts = {
 929     .name = "global",
 930     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 931     .desc = {
 932         {
 933             .name = "driver",
 934             .type = QEMU_OPT_STRING,
 935         },{
 936             .name = "property",
 937             .type = QEMU_OPT_STRING,
 938         },{
 939             .name = "value",
 940             .type = QEMU_OPT_STRING,
 941         },
 942         { /* end of list */ }
 943     },
 944 };
 945
 946 int qemu_global_option(const char *str)
 947 {
 948     char driver[64], property[64];
 949     QemuOpts *opts;
 950     int rc, offset;
 951
 952     rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
 953     if (rc == 2 && str[offset] == '=') {
 954         opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 955         qemu_opt_set(opts, "driver", driver, &error_abort);
 956         qemu_opt_set(opts, "property", property, &error_abort);
 957         qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
 958         return 0;
 959     }
 960
 961     opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
 962     if (!opts) {
 963         return -1;
 964     }
 965
 966     return 0;
 967 }