qdev-monitor.c

   1 /*
   2  *  Dynamic device configuration and creation.
   3  *
   4  *  Copyright (c) 2009 CodeSourcery
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "qemu/osdep.h"
  21 #include "hw/sysbus.h"
  22 #include "monitor/hmp.h"
  23 #include "monitor/monitor.h"
  24 #include "monitor/qdev.h"
  25 #include "sysemu/arch_init.h"
  26 #include "qapi/error.h"
  27 #include "qapi/qapi-commands-qdev.h"
  28 #include "qapi/qmp/qdict.h"
  29 #include "qapi/qmp/qerror.h"
  30 #include "qemu/config-file.h"
  31 #include "qemu/error-report.h"
  32 #include "qemu/help_option.h"
  33 #include "qemu/option.h"
  34 #include "qemu/qemu-print.h"
  35 #include "qemu/option_int.h"
  36 #include "sysemu/block-backend.h"
  37 #include "sysemu/sysemu.h"
  38 #include "migration/misc.h"
  39 #include "migration/migration.h"
  40
  41 /*
  42  * Aliases were a bad idea from the start.  Let's keep them
  43  * from spreading further.
  44  */
  45 typedef struct QDevAlias
  46 {
  47     const char *typename;
  48     const char *alias;
  49     uint32_t arch_mask;
  50 } QDevAlias;
  51
  52 /* Please keep this table sorted by typename. */
  53 static const QDevAlias qdev_alias_table[] = {
  54     { "e1000", "e1000-82540em" },
  55     { "ich9-ahci", "ahci" },
  56     { "lsi53c895a", "lsi" },
  57     { "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_S390X },
  58     { "virtio-9p-pci", "virtio-9p", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  59     { "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_S390X },
  60     { "virtio-balloon-pci", "virtio-balloon",
  61             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  62     { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
  63     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  64     { "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_S390X },
  65     { "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  66     { "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_S390X },
  67     { "virtio-input-host-pci", "virtio-input-host",
  68             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  69     { "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_S390X },
  70     { "virtio-keyboard-pci", "virtio-keyboard",
  71             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  72     { "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_S390X },
  73     { "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  74     { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
  75     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  76     { "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_S390X },
  77     { "virtio-rng-pci", "virtio-rng", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  78     { "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_S390X },
  79     { "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  80     { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
  81     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  82     { "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_S390X },
  83     { "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  84     { }
  85 };
  86
  87 static const char *qdev_class_get_alias(DeviceClass *dc)
  88 {
  89     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  90     int i;
  91
  92     for (i = 0; qdev_alias_table[i].typename; i++) {
  93         if (qdev_alias_table[i].arch_mask &&
  94             !(qdev_alias_table[i].arch_mask & arch_type)) {
  95             continue;
  96         }
  97
  98         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
  99             return qdev_alias_table[i].alias;
 100         }
 101     }
 102
 103     return NULL;
 104 }
 105
 106 static bool qdev_class_has_alias(DeviceClass *dc)
 107 {
 108     return (qdev_class_get_alias(dc) != NULL);
 109 }
 110
 111 static void qdev_print_devinfo(DeviceClass *dc)
 112 {
 113     qemu_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
 114     if (dc->bus_type) {
 115         qemu_printf(", bus %s", dc->bus_type);
 116     }
 117     if (qdev_class_has_alias(dc)) {
 118         qemu_printf(", alias \"%s\"", qdev_class_get_alias(dc));
 119     }
 120     if (dc->desc) {
 121         qemu_printf(", desc \"%s\"", dc->desc);
 122     }
 123     if (!dc->user_creatable) {
 124         qemu_printf(", no-user");
 125     }
 126     qemu_printf("\n");
 127 }
 128
 129 static void qdev_print_devinfos(bool show_no_user)
 130 {
 131     static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
 132         [DEVICE_CATEGORY_BRIDGE]  = "Controller/Bridge/Hub",
 133         [DEVICE_CATEGORY_USB]     = "USB",
 134         [DEVICE_CATEGORY_STORAGE] = "Storage",
 135         [DEVICE_CATEGORY_NETWORK] = "Network",
 136         [DEVICE_CATEGORY_INPUT]   = "Input",
 137         [DEVICE_CATEGORY_DISPLAY] = "Display",
 138         [DEVICE_CATEGORY_SOUND]   = "Sound",
 139         [DEVICE_CATEGORY_MISC]    = "Misc",
 140         [DEVICE_CATEGORY_CPU]     = "CPU",
 141         [DEVICE_CATEGORY_MAX]     = "Uncategorized",
 142     };
 143     GSList *list, *elt;
 144     int i;
 145     bool cat_printed;
 146
 147     list = object_class_get_list_sorted(TYPE_DEVICE, false);
 148
 149     for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
 150         cat_printed = false;
 151         for (elt = list; elt; elt = elt->next) {
 152             DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
 153                                                  TYPE_DEVICE);
 154             if ((i < DEVICE_CATEGORY_MAX
 155                  ? !test_bit(i, dc->categories)
 156                  : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
 157                 || (!show_no_user
 158                     && !dc->user_creatable)) {
 159                 continue;
 160             }
 161             if (!cat_printed) {
 162                 qemu_printf("%s%s devices:\n", i ? "\n" : "", cat_name[i]);
 163                 cat_printed = true;
 164             }
 165             qdev_print_devinfo(dc);
 166         }
 167     }
 168
 169     g_slist_free(list);
 170 }
 171
 172 static int set_property(void *opaque, const char *name, const char *value,
 173                         Error **errp)
 174 {
 175     Object *obj = opaque;
 176     Error *err = NULL;
 177
 178     if (strcmp(name, "driver") == 0)
 179         return 0;
 180     if (strcmp(name, "bus") == 0)
 181         return 0;
 182
 183     object_property_parse(obj, value, name, &err);
 184     if (err != NULL) {
 185         error_propagate(errp, err);
 186         return -1;
 187     }
 188     return 0;
 189 }
 190
 191 static const char *find_typename_by_alias(const char *alias)
 192 {
 193     int i;
 194
 195     for (i = 0; qdev_alias_table[i].alias; i++) {
 196         if (qdev_alias_table[i].arch_mask &&
 197             !(qdev_alias_table[i].arch_mask & arch_type)) {
 198             continue;
 199         }
 200
 201         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 202             return qdev_alias_table[i].typename;
 203         }
 204     }
 205
 206     return NULL;
 207 }
 208
 209 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
 210 {
 211     ObjectClass *oc;
 212     DeviceClass *dc;
 213     const char *original_name = *driver;
 214
 215     oc = object_class_by_name(*driver);
 216     if (!oc) {
 217         const char *typename = find_typename_by_alias(*driver);
 218
 219         if (typename) {
 220             *driver = typename;
 221             oc = object_class_by_name(*driver);
 222         }
 223     }
 224
 225     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 226         if (*driver != original_name) {
 227             error_setg(errp, "'%s' (alias '%s') is not a valid device model"
 228                        " name", original_name, *driver);
 229         } else {
 230             error_setg(errp, "'%s' is not a valid device model name", *driver);
 231         }
 232         return NULL;
 233     }
 234
 235     if (object_class_is_abstract(oc)) {
 236         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 237                    "non-abstract device type");
 238         return NULL;
 239     }
 240
 241     dc = DEVICE_CLASS(oc);
 242     if (!dc->user_creatable ||
 243         (qdev_hotplug && !dc->hotpluggable)) {
 244         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 245                    "pluggable device type");
 246         return NULL;
 247     }
 248
 249     return dc;
 250 }
 251
 252
 253 int qdev_device_help(QemuOpts *opts)
 254 {
 255     Error *local_err = NULL;
 256     const char *driver;
 257     ObjectPropertyInfoList *prop_list;
 258     ObjectPropertyInfoList *prop;
 259
 260     driver = qemu_opt_get(opts, "driver");
 261     if (driver && is_help_option(driver)) {
 262         qdev_print_devinfos(false);
 263         return 1;
 264     }
 265
 266     if (!driver || !qemu_opt_has_help_opt(opts)) {
 267         return 0;
 268     }
 269
 270     if (!object_class_by_name(driver)) {
 271         const char *typename = find_typename_by_alias(driver);
 272
 273         if (typename) {
 274             driver = typename;
 275         }
 276     }
 277
 278     prop_list = qmp_device_list_properties(driver, &local_err);
 279     if (local_err) {
 280         goto error;
 281     }
 282
 283     if (prop_list) {
 284         qemu_printf("%s options:\n", driver);
 285     } else {
 286         qemu_printf("There are no options for %s.\n", driver);
 287     }
 288     for (prop = prop_list; prop; prop = prop->next) {
 289         int len;
 290         qemu_printf("  %s=<%s>%n", prop->value->name, prop->value->type, &len);
 291         if (prop->value->has_description) {
 292             if (len < 24) {
 293                 qemu_printf("%*s", 24 - len, "");
 294             }
 295             qemu_printf(" - %s\n", prop->value->description);
 296         } else {
 297             qemu_printf("\n");
 298         }
 299     }
 300
 301     qapi_free_ObjectPropertyInfoList(prop_list);
 302     return 1;
 303
 304 error:
 305     error_report_err(local_err);
 306     return 1;
 307 }
 308
 309 static Object *qdev_get_peripheral(void)
 310 {
 311     static Object *dev;
 312
 313     if (dev == NULL) {
 314         dev = container_get(qdev_get_machine(), "/peripheral");
 315     }
 316
 317     return dev;
 318 }
 319
 320 static Object *qdev_get_peripheral_anon(void)
 321 {
 322     static Object *dev;
 323
 324     if (dev == NULL) {
 325         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 326     }
 327
 328     return dev;
 329 }
 330
 331 static void qbus_error_append_bus_list_hint(DeviceState *dev,
 332                                             Error *const *errp)
 333 {
 334     BusState *child;
 335     const char *sep = " ";
 336
 337     error_append_hint(errp, "child buses at \"%s\":",
 338                       dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 339     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 340         error_append_hint(errp, "%s\"%s\"", sep, child->name);
 341         sep = ", ";
 342     }
 343     error_append_hint(errp, "\n");
 344 }
 345
 346 static void qbus_error_append_dev_list_hint(BusState *bus,
 347                                             Error *const *errp)
 348 {
 349     BusChild *kid;
 350     const char *sep = " ";
 351
 352     error_append_hint(errp, "devices at \"%s\":", bus->name);
 353     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 354         DeviceState *dev = kid->child;
 355         error_append_hint(errp, "%s\"%s\"", sep,
 356                           object_get_typename(OBJECT(dev)));
 357         if (dev->id) {
 358             error_append_hint(errp, "/\"%s\"", dev->id);
 359         }
 360         sep = ", ";
 361     }
 362     error_append_hint(errp, "\n");
 363 }
 364
 365 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 366 {
 367     BusState *child;
 368
 369     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 370         if (strcmp(child->name, elem) == 0) {
 371             return child;
 372         }
 373     }
 374     return NULL;
 375 }
 376
 377 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 378 {
 379     BusChild *kid;
 380
 381     /*
 382      * try to match in order:
 383      *   (1) instance id, if present
 384      *   (2) driver name
 385      *   (3) driver alias, if present
 386      */
 387     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 388         DeviceState *dev = kid->child;
 389         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 390             return dev;
 391         }
 392     }
 393     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 394         DeviceState *dev = kid->child;
 395         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 396             return dev;
 397         }
 398     }
 399     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 400         DeviceState *dev = kid->child;
 401         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 402
 403         if (qdev_class_has_alias(dc) &&
 404             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 405             return dev;
 406         }
 407     }
 408     return NULL;
 409 }
 410
 411 static inline bool qbus_is_full(BusState *bus)
 412 {
 413     BusClass *bus_class = BUS_GET_CLASS(bus);
 414     return bus_class->max_dev && bus->num_children >= bus_class->max_dev;
 415 }
 416
 417 /*
 418  * Search the tree rooted at @bus for a bus.
 419  * If @name, search for a bus with that name.  Note that bus names
 420  * need not be unique.  Yes, that's screwed up.
 421  * Else search for a bus that is a subtype of @bus_typename.
 422  * If more than one exists, prefer one that can take another device.
 423  * Return the bus if found, else %NULL.
 424  */
 425 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 426                                      const char *bus_typename)
 427 {
 428     BusChild *kid;
 429     BusState *pick, *child, *ret;
 430     bool match;
 431
 432     assert(name || bus_typename);
 433     if (name) {
 434         match = !strcmp(bus->name, name);
 435     } else {
 436         match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
 437     }
 438
 439     if (match && !qbus_is_full(bus)) {
 440         return bus;             /* root matches and isn't full */
 441     }
 442
 443     pick = match ? bus : NULL;
 444
 445     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 446         DeviceState *dev = kid->child;
 447         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 448             ret = qbus_find_recursive(child, name, bus_typename);
 449             if (ret && !qbus_is_full(ret)) {
 450                 return ret;     /* a descendant matches and isn't full */
 451             }
 452             if (ret && !pick) {
 453                 pick = ret;
 454             }
 455         }
 456     }
 457
 458     /* root or a descendant matches, but is full */
 459     return pick;
 460 }
 461
 462 static BusState *qbus_find(const char *path, Error **errp)
 463 {
 464     DeviceState *dev;
 465     BusState *bus;
 466     char elem[128];
 467     int pos, len;
 468
 469     /* find start element */
 470     if (path[0] == '/') {
 471         bus = sysbus_get_default();
 472         pos = 0;
 473     } else {
 474         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 475             assert(!path[0]);
 476             elem[0] = len = 0;
 477         }
 478         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 479         if (!bus) {
 480             error_setg(errp, "Bus '%s' not found", elem);
 481             return NULL;
 482         }
 483         pos = len;
 484     }
 485
 486     for (;;) {
 487         assert(path[pos] == '/' || !path[pos]);
 488         while (path[pos] == '/') {
 489             pos++;
 490         }
 491         if (path[pos] == '\0') {
 492             break;
 493         }
 494
 495         /* find device */
 496         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 497             g_assert_not_reached();
 498             elem[0] = len = 0;
 499         }
 500         pos += len;
 501         dev = qbus_find_dev(bus, elem);
 502         if (!dev) {
 503             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 504                       "Device '%s' not found", elem);
 505             qbus_error_append_dev_list_hint(bus, errp);
 506             return NULL;
 507         }
 508
 509         assert(path[pos] == '/' || !path[pos]);
 510         while (path[pos] == '/') {
 511             pos++;
 512         }
 513         if (path[pos] == '\0') {
 514             /* last specified element is a device.  If it has exactly
 515              * one child bus accept it nevertheless */
 516             if (dev->num_child_bus == 1) {
 517                 bus = QLIST_FIRST(&dev->child_bus);
 518                 break;
 519             }
 520             if (dev->num_child_bus) {
 521                 error_setg(errp, "Device '%s' has multiple child buses",
 522                            elem);
 523                 qbus_error_append_bus_list_hint(dev, errp);
 524             } else {
 525                 error_setg(errp, "Device '%s' has no child bus", elem);
 526             }
 527             return NULL;
 528         }
 529
 530         /* find bus */
 531         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 532             g_assert_not_reached();
 533             elem[0] = len = 0;
 534         }
 535         pos += len;
 536         bus = qbus_find_bus(dev, elem);
 537         if (!bus) {
 538             error_setg(errp, "Bus '%s' not found", elem);
 539             qbus_error_append_bus_list_hint(dev, errp);
 540             return NULL;
 541         }
 542     }
 543
 544     if (qbus_is_full(bus)) {
 545         error_setg(errp, "Bus '%s' is full", path);
 546         return NULL;
 547     }
 548     return bus;
 549 }
 550
 551 void qdev_set_id(DeviceState *dev, const char *id)
 552 {
 553     if (id) {
 554         dev->id = id;
 555     }
 556
 557     if (dev->id) {
 558         object_property_add_child(qdev_get_peripheral(), dev->id,
 559                                   OBJECT(dev), NULL);
 560     } else {
 561         static int anon_count;
 562         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 563         object_property_add_child(qdev_get_peripheral_anon(), name,
 564                                   OBJECT(dev), NULL);
 565         g_free(name);
 566     }
 567 }
 568
 569 static int is_failover_device(void *opaque, const char *name, const char *value,
 570                         Error **errp)
 571 {
 572     if (strcmp(name, "failover_pair_id") == 0) {
 573         QemuOpts *opts = (QemuOpts *)opaque;
 574
 575         if (qdev_should_hide_device(opts)) {
 576             return 1;
 577         }
 578     }
 579
 580     return 0;
 581 }
 582
 583 static bool should_hide_device(QemuOpts *opts)
 584 {
 585     if (qemu_opt_foreach(opts, is_failover_device, opts, NULL) == 0) {
 586         return false;
 587     }
 588     return true;
 589 }
 590
 591 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 592 {
 593     DeviceClass *dc;
 594     const char *driver, *path;
 595     DeviceState *dev = NULL;
 596     BusState *bus = NULL;
 597     Error *err = NULL;
 598     bool hide;
 599
 600     driver = qemu_opt_get(opts, "driver");
 601     if (!driver) {
 602         error_setg(errp, QERR_MISSING_PARAMETER, "driver");
 603         return NULL;
 604     }
 605
 606     /* find driver */
 607     dc = qdev_get_device_class(&driver, errp);
 608     if (!dc) {
 609         return NULL;
 610     }
 611
 612     /* find bus */
 613     path = qemu_opt_get(opts, "bus");
 614     if (path != NULL) {
 615         bus = qbus_find(path, errp);
 616         if (!bus) {
 617             return NULL;
 618         }
 619         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 620             error_setg(errp, "Device '%s' can't go on %s bus",
 621                        driver, object_get_typename(OBJECT(bus)));
 622             return NULL;
 623         }
 624     } else if (dc->bus_type != NULL) {
 625         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 626         if (!bus || qbus_is_full(bus)) {
 627             error_setg(errp, "No '%s' bus found for device '%s'",
 628                        dc->bus_type, driver);
 629             return NULL;
 630         }
 631     }
 632     hide = should_hide_device(opts);
 633
 634     if ((hide || qdev_hotplug) && bus && !qbus_is_hotpluggable(bus)) {
 635         error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
 636         return NULL;
 637     }
 638
 639     if (hide) {
 640         return NULL;
 641     }
 642
 643     if (!migration_is_idle()) {
 644         error_setg(errp, "device_add not allowed while migrating");
 645         return NULL;
 646     }
 647
 648     /* create device */
 649     dev = DEVICE(object_new(driver));
 650
 651     /* Check whether the hotplug is allowed by the machine */
 652     if (qdev_hotplug && !qdev_hotplug_allowed(dev, &err)) {
 653         /* Error must be set in the machine hook */
 654         assert(err);
 655         goto err_del_dev;
 656     }
 657
 658     if (bus) {
 659         qdev_set_parent_bus(dev, bus);
 660     } else if (qdev_hotplug && !qdev_get_machine_hotplug_handler(dev)) {
 661         /* No bus, no machine hotplug handler --> device is not hotpluggable */
 662         error_setg(&err, "Device '%s' can not be hotplugged on this machine",
 663                    driver);
 664         goto err_del_dev;
 665     }
 666
 667     qdev_set_id(dev, qemu_opts_id(opts));
 668
 669     /* set properties */
 670     if (qemu_opt_foreach(opts, set_property, dev, &err)) {
 671         goto err_del_dev;
 672     }
 673
 674     dev->opts = opts;
 675     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 676     if (err != NULL) {
 677         dev->opts = NULL;
 678         goto err_del_dev;
 679     }
 680     return dev;
 681
 682 err_del_dev:
 683     error_propagate(errp, err);
 684     if (dev) {
 685         object_unparent(OBJECT(dev));
 686         object_unref(OBJECT(dev));
 687     }
 688     return NULL;
 689 }
 690
 691
 692 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 693 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 694
 695 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 696                              int indent)
 697 {
 698     if (!props)
 699         return;
 700     for (; props->name; props++) {
 701         Error *err = NULL;
 702         char *value;
 703         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 704         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 705             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 706         } else {
 707             value = object_property_print(OBJECT(dev), props->name, true, &err);
 708         }
 709         g_free(legacy_name);
 710
 711         if (err) {
 712             error_free(err);
 713             continue;
 714         }
 715         qdev_printf("%s = %s\n", props->name,
 716                     value && *value ? value : "<null>");
 717         g_free(value);
 718     }
 719 }
 720
 721 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 722 {
 723     BusClass *bc = BUS_GET_CLASS(bus);
 724
 725     if (bc->print_dev) {
 726         bc->print_dev(mon, dev, indent);
 727     }
 728 }
 729
 730 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 731 {
 732     ObjectClass *class;
 733     BusState *child;
 734     NamedGPIOList *ngl;
 735
 736     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 737                 dev->id ? dev->id : "");
 738     indent += 2;
 739     QLIST_FOREACH(ngl, &dev->gpios, node) {
 740         if (ngl->num_in) {
 741             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 742                         ngl->num_in);
 743         }
 744         if (ngl->num_out) {
 745             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 746                         ngl->num_out);
 747         }
 748     }
 749     class = object_get_class(OBJECT(dev));
 750     do {
 751         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 752         class = object_class_get_parent(class);
 753     } while (class != object_class_by_name(TYPE_DEVICE));
 754     bus_print_dev(dev->parent_bus, mon, dev, indent);
 755     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 756         qbus_print(mon, child, indent);
 757     }
 758 }
 759
 760 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 761 {
 762     BusChild *kid;
 763
 764     qdev_printf("bus: %s\n", bus->name);
 765     indent += 2;
 766     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 767     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 768         DeviceState *dev = kid->child;
 769         qdev_print(mon, dev, indent);
 770     }
 771 }
 772 #undef qdev_printf
 773
 774 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
 775 {
 776     if (sysbus_get_default())
 777         qbus_print(mon, sysbus_get_default(), 0);
 778 }
 779
 780 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
 781 {
 782     qdev_print_devinfos(true);
 783 }
 784
 785 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
 786 {
 787     Error *local_err = NULL;
 788     QemuOpts *opts;
 789     DeviceState *dev;
 790
 791     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 792     if (local_err) {
 793         error_propagate(errp, local_err);
 794         return;
 795     }
 796     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 797         qemu_opts_del(opts);
 798         return;
 799     }
 800     dev = qdev_device_add(opts, &local_err);
 801     if (!dev) {
 802         error_propagate(errp, local_err);
 803         qemu_opts_del(opts);
 804         return;
 805     }
 806     object_unref(OBJECT(dev));
 807 }
 808
 809 static DeviceState *find_device_state(const char *id, Error **errp)
 810 {
 811     Object *obj;
 812
 813     if (id[0] == '/') {
 814         obj = object_resolve_path(id, NULL);
 815     } else {
 816         char *root_path = object_get_canonical_path(qdev_get_peripheral());
 817         char *path = g_strdup_printf("%s/%s", root_path, id);
 818
 819         g_free(root_path);
 820         obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 821         g_free(path);
 822     }
 823
 824     if (!obj) {
 825         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 826                   "Device '%s' not found", id);
 827         return NULL;
 828     }
 829
 830     if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
 831         error_setg(errp, "%s is not a hotpluggable device", id);
 832         return NULL;
 833     }
 834
 835     return DEVICE(obj);
 836 }
 837
 838 void qdev_unplug(DeviceState *dev, Error **errp)
 839 {
 840     DeviceClass *dc = DEVICE_GET_CLASS(dev);
 841     HotplugHandler *hotplug_ctrl;
 842     HotplugHandlerClass *hdc;
 843     Error *local_err = NULL;
 844
 845     if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
 846         error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
 847         return;
 848     }
 849
 850     if (!dc->hotpluggable) {
 851         error_setg(errp, QERR_DEVICE_NO_HOTPLUG,
 852                    object_get_typename(OBJECT(dev)));
 853         return;
 854     }
 855
 856     if (!migration_is_idle() && !dev->allow_unplug_during_migration) {
 857         error_setg(errp, "device_del not allowed while migrating");
 858         return;
 859     }
 860
 861     qdev_hot_removed = true;
 862
 863     hotplug_ctrl = qdev_get_hotplug_handler(dev);
 864     /* hotpluggable device MUST have HotplugHandler, if it doesn't
 865      * then something is very wrong with it */
 866     g_assert(hotplug_ctrl);
 867
 868     /* If device supports async unplug just request it to be done,
 869      * otherwise just remove it synchronously */
 870     hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
 871     if (hdc->unplug_request) {
 872         hotplug_handler_unplug_request(hotplug_ctrl, dev, &local_err);
 873     } else {
 874         hotplug_handler_unplug(hotplug_ctrl, dev, &local_err);
 875         if (!local_err) {
 876             object_unparent(OBJECT(dev));
 877         }
 878     }
 879     error_propagate(errp, local_err);
 880 }
 881
 882 void qmp_device_del(const char *id, Error **errp)
 883 {
 884     DeviceState *dev = find_device_state(id, errp);
 885     if (dev != NULL) {
 886         qdev_unplug(dev, errp);
 887     }
 888 }
 889
 890 void hmp_device_add(Monitor *mon, const QDict *qdict)
 891 {
 892     Error *err = NULL;
 893
 894     qmp_device_add((QDict *)qdict, NULL, &err);
 895     hmp_handle_error(mon, err);
 896 }
 897
 898 void hmp_device_del(Monitor *mon, const QDict *qdict)
 899 {
 900     const char *id = qdict_get_str(qdict, "id");
 901     Error *err = NULL;
 902
 903     qmp_device_del(id, &err);
 904     hmp_handle_error(mon, err);
 905 }
 906
 907 BlockBackend *blk_by_qdev_id(const char *id, Error **errp)
 908 {
 909     DeviceState *dev;
 910     BlockBackend *blk;
 911
 912     dev = find_device_state(id, errp);
 913     if (dev == NULL) {
 914         return NULL;
 915     }
 916
 917     blk = blk_by_dev(dev);
 918     if (!blk) {
 919         error_setg(errp, "Device does not have a block device backend");
 920     }
 921     return blk;
 922 }
 923
 924 void qdev_machine_init(void)
 925 {
 926     qdev_get_peripheral_anon();
 927     qdev_get_peripheral();
 928 }
 929
 930 QemuOptsList qemu_device_opts = {
 931     .name = "device",
 932     .implied_opt_name = "driver",
 933     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 934     .desc = {
 935         /*
 936          * no elements => accept any
 937          * sanity checking will happen later
 938          * when setting device properties
 939          */
 940         { /* end of list */ }
 941     },
 942 };
 943
 944 QemuOptsList qemu_global_opts = {
 945     .name = "global",
 946     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 947     .desc = {
 948         {
 949             .name = "driver",
 950             .type = QEMU_OPT_STRING,
 951         },{
 952             .name = "property",
 953             .type = QEMU_OPT_STRING,
 954         },{
 955             .name = "value",
 956             .type = QEMU_OPT_STRING,
 957         },
 958         { /* end of list */ }
 959     },
 960 };
 961
 962 int qemu_global_option(const char *str)
 963 {
 964     char driver[64], property[64];
 965     QemuOpts *opts;
 966     int rc, offset;
 967
 968     rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
 969     if (rc == 2 && str[offset] == '=') {
 970         opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 971         qemu_opt_set(opts, "driver", driver, &error_abort);
 972         qemu_opt_set(opts, "property", property, &error_abort);
 973         qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
 974         return 0;
 975     }
 976
 977     opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
 978     if (!opts) {
 979         return -1;
 980     }
 981
 982     return 0;
 983 }