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 "hw/qdev.h"
  21 #include "monitor/monitor.h"
  22 #include "monitor/qdev.h"
  23 #include "qmp-commands.h"
  24 #include "sysemu/arch_init.h"
  25 #include "qemu/config-file.h"
  26
  27 /*
  28  * Aliases were a bad idea from the start.  Let's keep them
  29  * from spreading further.
  30  */
  31 typedef struct QDevAlias
  32 {
  33     const char *typename;
  34     const char *alias;
  35     uint32_t arch_mask;
  36 } QDevAlias;
  37
  38 static const QDevAlias qdev_alias_table[] = {
  39     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  40     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  41     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  42     { "virtio-balloon-pci", "virtio-balloon",
  43             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  44     { "virtio-blk-s390", "virtio-blk", QEMU_ARCH_S390X },
  45     { "virtio-net-s390", "virtio-net", QEMU_ARCH_S390X },
  46     { "virtio-serial-s390", "virtio-serial", QEMU_ARCH_S390X },
  47     { "lsi53c895a", "lsi" },
  48     { "ich9-ahci", "ahci" },
  49     { "kvm-pci-assign", "pci-assign" },
  50     { }
  51 };
  52
  53 static const char *qdev_class_get_alias(DeviceClass *dc)
  54 {
  55     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  56     int i;
  57
  58     for (i = 0; qdev_alias_table[i].typename; i++) {
  59         if (qdev_alias_table[i].arch_mask &&
  60             !(qdev_alias_table[i].arch_mask & arch_type)) {
  61             continue;
  62         }
  63
  64         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
  65             return qdev_alias_table[i].alias;
  66         }
  67     }
  68
  69     return NULL;
  70 }
  71
  72 static bool qdev_class_has_alias(DeviceClass *dc)
  73 {
  74     return (qdev_class_get_alias(dc) != NULL);
  75 }
  76
  77 static void qdev_print_devinfo(ObjectClass *klass, void *opaque)
  78 {
  79     DeviceClass *dc;
  80     bool *show_no_user = opaque;
  81
  82     dc = (DeviceClass *)object_class_dynamic_cast(klass, TYPE_DEVICE);
  83
  84     if (!dc || (show_no_user && !*show_no_user && dc->no_user)) {
  85         return;
  86     }
  87
  88     error_printf("name \"%s\"", object_class_get_name(klass));
  89     if (dc->bus_type) {
  90         error_printf(", bus %s", dc->bus_type);
  91     }
  92     if (qdev_class_has_alias(dc)) {
  93         error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
  94     }
  95     if (dc->desc) {
  96         error_printf(", desc \"%s\"", dc->desc);
  97     }
  98     if (dc->no_user) {
  99         error_printf(", no-user");
 100     }
 101     error_printf("\n");
 102 }
 103
 104 static int set_property(const char *name, const char *value, void *opaque)
 105 {
 106     DeviceState *dev = opaque;
 107
 108     if (strcmp(name, "driver") == 0)
 109         return 0;
 110     if (strcmp(name, "bus") == 0)
 111         return 0;
 112
 113     if (qdev_prop_parse(dev, name, value) == -1) {
 114         return -1;
 115     }
 116     return 0;
 117 }
 118
 119 static const char *find_typename_by_alias(const char *alias)
 120 {
 121     int i;
 122
 123     for (i = 0; qdev_alias_table[i].alias; i++) {
 124         if (qdev_alias_table[i].arch_mask &&
 125             !(qdev_alias_table[i].arch_mask & arch_type)) {
 126             continue;
 127         }
 128
 129         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 130             return qdev_alias_table[i].typename;
 131         }
 132     }
 133
 134     return NULL;
 135 }
 136
 137 int qdev_device_help(QemuOpts *opts)
 138 {
 139     const char *driver;
 140     Property *prop;
 141     ObjectClass *klass;
 142
 143     driver = qemu_opt_get(opts, "driver");
 144     if (driver && is_help_option(driver)) {
 145         bool show_no_user = false;
 146         object_class_foreach(qdev_print_devinfo, TYPE_DEVICE, false, &show_no_user);
 147         return 1;
 148     }
 149
 150     if (!driver || !qemu_opt_has_help_opt(opts)) {
 151         return 0;
 152     }
 153
 154     klass = object_class_by_name(driver);
 155     if (!klass) {
 156         const char *typename = find_typename_by_alias(driver);
 157
 158         if (typename) {
 159             driver = typename;
 160             klass = object_class_by_name(driver);
 161         }
 162     }
 163
 164     if (!klass) {
 165         return 0;
 166     }
 167     do {
 168         for (prop = DEVICE_CLASS(klass)->props; prop && prop->name; prop++) {
 169             /*
 170              * TODO Properties without a parser are just for dirty hacks.
 171              * qdev_prop_ptr is the only such PropertyInfo.  It's marked
 172              * for removal.  This conditional should be removed along with
 173              * it.
 174              */
 175             if (!prop->info->set) {
 176                 continue;           /* no way to set it, don't show */
 177             }
 178             error_printf("%s.%s=%s\n", driver, prop->name,
 179                          prop->info->legacy_name ?: prop->info->name);
 180         }
 181         klass = object_class_get_parent(klass);
 182     } while (klass != object_class_by_name(TYPE_DEVICE));
 183     return 1;
 184 }
 185
 186 static Object *qdev_get_peripheral(void)
 187 {
 188     static Object *dev;
 189
 190     if (dev == NULL) {
 191         dev = container_get(qdev_get_machine(), "/peripheral");
 192     }
 193
 194     return dev;
 195 }
 196
 197 static Object *qdev_get_peripheral_anon(void)
 198 {
 199     static Object *dev;
 200
 201     if (dev == NULL) {
 202         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 203     }
 204
 205     return dev;
 206 }
 207
 208 static void qbus_list_bus(DeviceState *dev)
 209 {
 210     BusState *child;
 211     const char *sep = " ";
 212
 213     error_printf("child busses at \"%s\":",
 214                  dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 215     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 216         error_printf("%s\"%s\"", sep, child->name);
 217         sep = ", ";
 218     }
 219     error_printf("\n");
 220 }
 221
 222 static void qbus_list_dev(BusState *bus)
 223 {
 224     BusChild *kid;
 225     const char *sep = " ";
 226
 227     error_printf("devices at \"%s\":", bus->name);
 228     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 229         DeviceState *dev = kid->child;
 230         error_printf("%s\"%s\"", sep, object_get_typename(OBJECT(dev)));
 231         if (dev->id)
 232             error_printf("/\"%s\"", dev->id);
 233         sep = ", ";
 234     }
 235     error_printf("\n");
 236 }
 237
 238 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 239 {
 240     BusState *child;
 241
 242     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 243         if (strcmp(child->name, elem) == 0) {
 244             return child;
 245         }
 246     }
 247     return NULL;
 248 }
 249
 250 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 251 {
 252     BusChild *kid;
 253
 254     /*
 255      * try to match in order:
 256      *   (1) instance id, if present
 257      *   (2) driver name
 258      *   (3) driver alias, if present
 259      */
 260     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 261         DeviceState *dev = kid->child;
 262         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 263             return dev;
 264         }
 265     }
 266     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 267         DeviceState *dev = kid->child;
 268         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 269             return dev;
 270         }
 271     }
 272     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 273         DeviceState *dev = kid->child;
 274         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 275
 276         if (qdev_class_has_alias(dc) &&
 277             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 278             return dev;
 279         }
 280     }
 281     return NULL;
 282 }
 283
 284 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 285                                      const char *bus_typename)
 286 {
 287     BusClass *bus_class = BUS_GET_CLASS(bus);
 288     BusChild *kid;
 289     BusState *child, *ret;
 290     int match = 1;
 291
 292     if (name && (strcmp(bus->name, name) != 0)) {
 293         match = 0;
 294     }
 295     if (bus_typename && !object_dynamic_cast(OBJECT(bus), bus_typename)) {
 296         match = 0;
 297     }
 298     if ((bus_class->max_dev != 0) && (bus_class->max_dev <= bus->max_index)) {
 299         if (name != NULL) {
 300             /* bus was explicitly specified: return an error. */
 301             qerror_report(ERROR_CLASS_GENERIC_ERROR, "Bus '%s' is full",
 302                           bus->name);
 303             return NULL;
 304         } else {
 305             /* bus was not specified: try to find another one. */
 306             match = 0;
 307         }
 308     }
 309     if (match) {
 310         return bus;
 311     }
 312
 313     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 314         DeviceState *dev = kid->child;
 315         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 316             ret = qbus_find_recursive(child, name, bus_typename);
 317             if (ret) {
 318                 return ret;
 319             }
 320         }
 321     }
 322     return NULL;
 323 }
 324
 325 static BusState *qbus_find(const char *path)
 326 {
 327     DeviceState *dev;
 328     BusState *bus;
 329     char elem[128];
 330     int pos, len;
 331
 332     /* find start element */
 333     if (path[0] == '/') {
 334         bus = sysbus_get_default();
 335         pos = 0;
 336     } else {
 337         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 338             assert(!path[0]);
 339             elem[0] = len = 0;
 340         }
 341         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 342         if (!bus) {
 343             qerror_report(QERR_BUS_NOT_FOUND, elem);
 344             return NULL;
 345         }
 346         pos = len;
 347     }
 348
 349     for (;;) {
 350         assert(path[pos] == '/' || !path[pos]);
 351         while (path[pos] == '/') {
 352             pos++;
 353         }
 354         if (path[pos] == '\0') {
 355             return bus;
 356         }
 357
 358         /* find device */
 359         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 360             assert(0);
 361             elem[0] = len = 0;
 362         }
 363         pos += len;
 364         dev = qbus_find_dev(bus, elem);
 365         if (!dev) {
 366             qerror_report(QERR_DEVICE_NOT_FOUND, elem);
 367             if (!monitor_cur_is_qmp()) {
 368                 qbus_list_dev(bus);
 369             }
 370             return NULL;
 371         }
 372
 373         assert(path[pos] == '/' || !path[pos]);
 374         while (path[pos] == '/') {
 375             pos++;
 376         }
 377         if (path[pos] == '\0') {
 378             /* last specified element is a device.  If it has exactly
 379              * one child bus accept it nevertheless */
 380             switch (dev->num_child_bus) {
 381             case 0:
 382                 qerror_report(QERR_DEVICE_NO_BUS, elem);
 383                 return NULL;
 384             case 1:
 385                 return QLIST_FIRST(&dev->child_bus);
 386             default:
 387                 qerror_report(QERR_DEVICE_MULTIPLE_BUSSES, elem);
 388                 if (!monitor_cur_is_qmp()) {
 389                     qbus_list_bus(dev);
 390                 }
 391                 return NULL;
 392             }
 393         }
 394
 395         /* find bus */
 396         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 397             assert(0);
 398             elem[0] = len = 0;
 399         }
 400         pos += len;
 401         bus = qbus_find_bus(dev, elem);
 402         if (!bus) {
 403             qerror_report(QERR_BUS_NOT_FOUND, elem);
 404             if (!monitor_cur_is_qmp()) {
 405                 qbus_list_bus(dev);
 406             }
 407             return NULL;
 408         }
 409     }
 410 }
 411
 412 DeviceState *qdev_device_add(QemuOpts *opts)
 413 {
 414     ObjectClass *obj;
 415     DeviceClass *k;
 416     const char *driver, *path, *id;
 417     DeviceState *qdev;
 418     BusState *bus;
 419
 420     driver = qemu_opt_get(opts, "driver");
 421     if (!driver) {
 422         qerror_report(QERR_MISSING_PARAMETER, "driver");
 423         return NULL;
 424     }
 425
 426     /* find driver */
 427     obj = object_class_by_name(driver);
 428     if (!obj) {
 429         const char *typename = find_typename_by_alias(driver);
 430
 431         if (typename) {
 432             driver = typename;
 433             obj = object_class_by_name(driver);
 434         }
 435     }
 436
 437     if (!obj) {
 438         qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver", "device type");
 439         return NULL;
 440     }
 441
 442     k = DEVICE_CLASS(obj);
 443
 444     /* find bus */
 445     path = qemu_opt_get(opts, "bus");
 446     if (path != NULL) {
 447         bus = qbus_find(path);
 448         if (!bus) {
 449             return NULL;
 450         }
 451         if (!object_dynamic_cast(OBJECT(bus), k->bus_type)) {
 452             qerror_report(QERR_BAD_BUS_FOR_DEVICE,
 453                           driver, object_get_typename(OBJECT(bus)));
 454             return NULL;
 455         }
 456     } else {
 457         bus = qbus_find_recursive(sysbus_get_default(), NULL, k->bus_type);
 458         if (!bus) {
 459             qerror_report(QERR_NO_BUS_FOR_DEVICE,
 460                           k->bus_type, driver);
 461             return NULL;
 462         }
 463     }
 464     if (qdev_hotplug && !bus->allow_hotplug) {
 465         qerror_report(QERR_BUS_NO_HOTPLUG, bus->name);
 466         return NULL;
 467     }
 468
 469     if (!bus) {
 470         bus = sysbus_get_default();
 471     }
 472
 473     /* create device, set properties */
 474     qdev = DEVICE(object_new(driver));
 475     qdev_set_parent_bus(qdev, bus);
 476
 477     id = qemu_opts_id(opts);
 478     if (id) {
 479         qdev->id = id;
 480     }
 481     if (qemu_opt_foreach(opts, set_property, qdev, 1) != 0) {
 482         qdev_free(qdev);
 483         return NULL;
 484     }
 485     if (qdev->id) {
 486         object_property_add_child(qdev_get_peripheral(), qdev->id,
 487                                   OBJECT(qdev), NULL);
 488     } else {
 489         static int anon_count;
 490         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 491         object_property_add_child(qdev_get_peripheral_anon(), name,
 492                                   OBJECT(qdev), NULL);
 493         g_free(name);
 494     }
 495     if (qdev_init(qdev) < 0) {
 496         qerror_report(QERR_DEVICE_INIT_FAILED, driver);
 497         return NULL;
 498     }
 499     qdev->opts = opts;
 500     return qdev;
 501 }
 502
 503
 504 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 505 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 506
 507 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 508                              int indent)
 509 {
 510     if (!props)
 511         return;
 512     for (; props->name; props++) {
 513         Error *err = NULL;
 514         char *value;
 515         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 516         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 517             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 518         } else {
 519             value = object_property_print(OBJECT(dev), props->name, &err);
 520         }
 521         g_free(legacy_name);
 522
 523         if (err) {
 524             error_free(err);
 525             continue;
 526         }
 527         qdev_printf("%s = %s\n", props->name,
 528                     value && *value ? value : "<null>");
 529         g_free(value);
 530     }
 531 }
 532
 533 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 534 {
 535     BusClass *bc = BUS_GET_CLASS(bus);
 536
 537     if (bc->print_dev) {
 538         bc->print_dev(mon, dev, indent);
 539     }
 540 }
 541
 542 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 543 {
 544     ObjectClass *class;
 545     BusState *child;
 546     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 547                 dev->id ? dev->id : "");
 548     indent += 2;
 549     if (dev->num_gpio_in) {
 550         qdev_printf("gpio-in %d\n", dev->num_gpio_in);
 551     }
 552     if (dev->num_gpio_out) {
 553         qdev_printf("gpio-out %d\n", dev->num_gpio_out);
 554     }
 555     class = object_get_class(OBJECT(dev));
 556     do {
 557         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 558         class = object_class_get_parent(class);
 559     } while (class != object_class_by_name(TYPE_DEVICE));
 560     bus_print_dev(dev->parent_bus, mon, dev, indent);
 561     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 562         qbus_print(mon, child, indent);
 563     }
 564 }
 565
 566 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 567 {
 568     BusChild *kid;
 569
 570     qdev_printf("bus: %s\n", bus->name);
 571     indent += 2;
 572     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 573     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 574         DeviceState *dev = kid->child;
 575         qdev_print(mon, dev, indent);
 576     }
 577 }
 578 #undef qdev_printf
 579
 580 void do_info_qtree(Monitor *mon, const QDict *qdict)
 581 {
 582     if (sysbus_get_default())
 583         qbus_print(mon, sysbus_get_default(), 0);
 584 }
 585
 586 void do_info_qdm(Monitor *mon, const QDict *qdict)
 587 {
 588     object_class_foreach(qdev_print_devinfo, TYPE_DEVICE, false, NULL);
 589 }
 590
 591 int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
 592 {
 593     Error *local_err = NULL;
 594     QemuOpts *opts;
 595     DeviceState *dev;
 596
 597     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 598     if (error_is_set(&local_err)) {
 599         qerror_report_err(local_err);
 600         error_free(local_err);
 601         return -1;
 602     }
 603     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 604         qemu_opts_del(opts);
 605         return 0;
 606     }
 607     dev = qdev_device_add(opts);
 608     if (!dev) {
 609         qemu_opts_del(opts);
 610         return -1;
 611     }
 612     object_unref(OBJECT(dev));
 613     return 0;
 614 }
 615
 616 void qmp_device_del(const char *id, Error **errp)
 617 {
 618     DeviceState *dev;
 619
 620     dev = qdev_find_recursive(sysbus_get_default(), id);
 621     if (NULL == dev) {
 622         error_set(errp, QERR_DEVICE_NOT_FOUND, id);
 623         return;
 624     }
 625
 626     qdev_unplug(dev, errp);
 627 }
 628
 629 void qdev_machine_init(void)
 630 {
 631     qdev_get_peripheral_anon();
 632     qdev_get_peripheral();
 633 }
 634
 635 QemuOptsList qemu_device_opts = {
 636     .name = "device",
 637     .implied_opt_name = "driver",
 638     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 639     .desc = {
 640         /*
 641          * no elements => accept any
 642          * sanity checking will happen later
 643          * when setting device properties
 644          */
 645         { /* end of list */ }
 646     },
 647 };
 648
 649 QemuOptsList qemu_global_opts = {
 650     .name = "global",
 651     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 652     .desc = {
 653         {
 654             .name = "driver",
 655             .type = QEMU_OPT_STRING,
 656         },{
 657             .name = "property",
 658             .type = QEMU_OPT_STRING,
 659         },{
 660             .name = "value",
 661             .type = QEMU_OPT_STRING,
 662         },
 663         { /* end of list */ }
 664     },
 665 };
 666
 667 int qemu_global_option(const char *str)
 668 {
 669     char driver[64], property[64];
 670     QemuOpts *opts;
 671     int rc, offset;
 672
 673     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 674     if (rc < 2 || str[offset] != '=') {
 675         error_report("can't parse: \"%s\"", str);
 676         return -1;
 677     }
 678
 679     opts = qemu_opts_create_nofail(&qemu_global_opts);
 680     qemu_opt_set(opts, "driver", driver);
 681     qemu_opt_set(opts, "property", property);
 682     qemu_opt_set(opts, "value", str+offset+1);
 683     return 0;
 684 }