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