qdev-monitor.c

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