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