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