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 "hw/sysbus.h"
  22 #include "monitor/monitor.h"
  23 #include "monitor/qdev.h"
  24 #include "qmp-commands.h"
  25 #include "sysemu/arch_init.h"
  26 #include "qemu/config-file.h"
  27
  28 /*
  29  * Aliases were a bad idea from the start.  Let's keep them
  30  * from spreading further.
  31  */
  32 typedef struct QDevAlias
  33 {
  34     const char *typename;
  35     const char *alias;
  36     uint32_t arch_mask;
  37 } QDevAlias;
  38
  39 static const QDevAlias qdev_alias_table[] = {
  40     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  41     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  42     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  43     { "virtio-balloon-pci", "virtio-balloon",
  44             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  45     { "virtio-blk-s390", "virtio-blk", QEMU_ARCH_S390X },
  46     { "virtio-net-s390", "virtio-net", QEMU_ARCH_S390X },
  47     { "virtio-serial-s390", "virtio-serial", QEMU_ARCH_S390X },
  48     { "lsi53c895a", "lsi" },
  49     { "ich9-ahci", "ahci" },
  50     { "kvm-pci-assign", "pci-assign" },
  51     { }
  52 };
  53
  54 static const char *qdev_class_get_alias(DeviceClass *dc)
  55 {
  56     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  57     int i;
  58
  59     for (i = 0; qdev_alias_table[i].typename; i++) {
  60         if (qdev_alias_table[i].arch_mask &&
  61             !(qdev_alias_table[i].arch_mask & arch_type)) {
  62             continue;
  63         }
  64
  65         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
  66             return qdev_alias_table[i].alias;
  67         }
  68     }
  69
  70     return NULL;
  71 }
  72
  73 static bool qdev_class_has_alias(DeviceClass *dc)
  74 {
  75     return (qdev_class_get_alias(dc) != NULL);
  76 }
  77
  78 static void qdev_print_devinfo(ObjectClass *klass, void *opaque)
  79 {
  80     DeviceClass *dc;
  81     bool *show_no_user = opaque;
  82
  83     dc = (DeviceClass *)object_class_dynamic_cast(klass, TYPE_DEVICE);
  84
  85     if (!dc || (show_no_user && !*show_no_user && dc->no_user)) {
  86         return;
  87     }
  88
  89     error_printf("name \"%s\"", object_class_get_name(klass));
  90     if (dc->bus_type) {
  91         error_printf(", bus %s", dc->bus_type);
  92     }
  93     if (qdev_class_has_alias(dc)) {
  94         error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
  95     }
  96     if (dc->desc) {
  97         error_printf(", desc \"%s\"", dc->desc);
  98     }
  99     if (dc->no_user) {
 100         error_printf(", no-user");
 101     }
 102     error_printf("\n");
 103 }
 104
 105 static int set_property(const char *name, const char *value, void *opaque)
 106 {
 107     DeviceState *dev = opaque;
 108     Error *err = NULL;
 109
 110     if (strcmp(name, "driver") == 0)
 111         return 0;
 112     if (strcmp(name, "bus") == 0)
 113         return 0;
 114
 115     qdev_prop_parse(dev, name, value, &err);
 116     if (err != NULL) {
 117         qerror_report_err(err);
 118         error_free(err);
 119         return -1;
 120     }
 121     return 0;
 122 }
 123
 124 static const char *find_typename_by_alias(const char *alias)
 125 {
 126     int i;
 127
 128     for (i = 0; qdev_alias_table[i].alias; i++) {
 129         if (qdev_alias_table[i].arch_mask &&
 130             !(qdev_alias_table[i].arch_mask & arch_type)) {
 131             continue;
 132         }
 133
 134         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 135             return qdev_alias_table[i].typename;
 136         }
 137     }
 138
 139     return NULL;
 140 }
 141
 142 int qdev_device_help(QemuOpts *opts)
 143 {
 144     const char *driver;
 145     Property *prop;
 146     ObjectClass *klass;
 147
 148     driver = qemu_opt_get(opts, "driver");
 149     if (driver && is_help_option(driver)) {
 150         bool show_no_user = false;
 151         object_class_foreach(qdev_print_devinfo, TYPE_DEVICE, false, &show_no_user);
 152         return 1;
 153     }
 154
 155     if (!driver || !qemu_opt_has_help_opt(opts)) {
 156         return 0;
 157     }
 158
 159     klass = object_class_by_name(driver);
 160     if (!klass) {
 161         const char *typename = find_typename_by_alias(driver);
 162
 163         if (typename) {
 164             driver = typename;
 165             klass = object_class_by_name(driver);
 166         }
 167     }
 168
 169     if (!klass) {
 170         return 0;
 171     }
 172     do {
 173         for (prop = DEVICE_CLASS(klass)->props; prop && prop->name; prop++) {
 174             /*
 175              * TODO Properties without a parser are just for dirty hacks.
 176              * qdev_prop_ptr is the only such PropertyInfo.  It's marked
 177              * for removal.  This conditional should be removed along with
 178              * it.
 179              */
 180             if (!prop->info->set) {
 181                 continue;           /* no way to set it, don't show */
 182             }
 183             error_printf("%s.%s=%s\n", driver, prop->name,
 184                          prop->info->legacy_name ?: prop->info->name);
 185         }
 186         klass = object_class_get_parent(klass);
 187     } while (klass != object_class_by_name(TYPE_DEVICE));
 188     return 1;
 189 }
 190
 191 static Object *qdev_get_peripheral(void)
 192 {
 193     static Object *dev;
 194
 195     if (dev == NULL) {
 196         dev = container_get(qdev_get_machine(), "/peripheral");
 197     }
 198
 199     return dev;
 200 }
 201
 202 static Object *qdev_get_peripheral_anon(void)
 203 {
 204     static Object *dev;
 205
 206     if (dev == NULL) {
 207         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 208     }
 209
 210     return dev;
 211 }
 212
 213 static void qbus_list_bus(DeviceState *dev)
 214 {
 215     BusState *child;
 216     const char *sep = " ";
 217
 218     error_printf("child busses at \"%s\":",
 219                  dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 220     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 221         error_printf("%s\"%s\"", sep, child->name);
 222         sep = ", ";
 223     }
 224     error_printf("\n");
 225 }
 226
 227 static void qbus_list_dev(BusState *bus)
 228 {
 229     BusChild *kid;
 230     const char *sep = " ";
 231
 232     error_printf("devices at \"%s\":", bus->name);
 233     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 234         DeviceState *dev = kid->child;
 235         error_printf("%s\"%s\"", sep, object_get_typename(OBJECT(dev)));
 236         if (dev->id)
 237             error_printf("/\"%s\"", dev->id);
 238         sep = ", ";
 239     }
 240     error_printf("\n");
 241 }
 242
 243 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 244 {
 245     BusState *child;
 246
 247     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 248         if (strcmp(child->name, elem) == 0) {
 249             return child;
 250         }
 251     }
 252     return NULL;
 253 }
 254
 255 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 256 {
 257     BusChild *kid;
 258
 259     /*
 260      * try to match in order:
 261      *   (1) instance id, if present
 262      *   (2) driver name
 263      *   (3) driver alias, if present
 264      */
 265     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 266         DeviceState *dev = kid->child;
 267         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 268             return dev;
 269         }
 270     }
 271     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 272         DeviceState *dev = kid->child;
 273         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 274             return dev;
 275         }
 276     }
 277     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 278         DeviceState *dev = kid->child;
 279         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 280
 281         if (qdev_class_has_alias(dc) &&
 282             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 283             return dev;
 284         }
 285     }
 286     return NULL;
 287 }
 288
 289 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 290                                      const char *bus_typename)
 291 {
 292     BusClass *bus_class = BUS_GET_CLASS(bus);
 293     BusChild *kid;
 294     BusState *child, *ret;
 295     int match = 1;
 296
 297     if (name && (strcmp(bus->name, name) != 0)) {
 298         match = 0;
 299     } else if (bus_typename && !object_dynamic_cast(OBJECT(bus), bus_typename)) {
 300         match = 0;
 301     } else if ((bus_class->max_dev != 0) && (bus_class->max_dev <= bus->max_index)) {
 302         if (name != NULL) {
 303             /* bus was explicitly specified: return an error. */
 304             qerror_report(ERROR_CLASS_GENERIC_ERROR, "Bus '%s' is full",
 305                           bus->name);
 306             return NULL;
 307         } else {
 308             /* bus was not specified: try to find another one. */
 309             match = 0;
 310         }
 311     }
 312     if (match) {
 313         return bus;
 314     }
 315
 316     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 317         DeviceState *dev = kid->child;
 318         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 319             ret = qbus_find_recursive(child, name, bus_typename);
 320             if (ret) {
 321                 return ret;
 322             }
 323         }
 324     }
 325     return NULL;
 326 }
 327
 328 static BusState *qbus_find(const char *path)
 329 {
 330     DeviceState *dev;
 331     BusState *bus;
 332     char elem[128];
 333     int pos, len;
 334
 335     /* find start element */
 336     if (path[0] == '/') {
 337         bus = sysbus_get_default();
 338         pos = 0;
 339     } else {
 340         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 341             assert(!path[0]);
 342             elem[0] = len = 0;
 343         }
 344         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 345         if (!bus) {
 346             qerror_report(QERR_BUS_NOT_FOUND, elem);
 347             return NULL;
 348         }
 349         pos = len;
 350     }
 351
 352     for (;;) {
 353         assert(path[pos] == '/' || !path[pos]);
 354         while (path[pos] == '/') {
 355             pos++;
 356         }
 357         if (path[pos] == '\0') {
 358             return bus;
 359         }
 360
 361         /* find device */
 362         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 363             assert(0);
 364             elem[0] = len = 0;
 365         }
 366         pos += len;
 367         dev = qbus_find_dev(bus, elem);
 368         if (!dev) {
 369             qerror_report(QERR_DEVICE_NOT_FOUND, elem);
 370             if (!monitor_cur_is_qmp()) {
 371                 qbus_list_dev(bus);
 372             }
 373             return NULL;
 374         }
 375
 376         assert(path[pos] == '/' || !path[pos]);
 377         while (path[pos] == '/') {
 378             pos++;
 379         }
 380         if (path[pos] == '\0') {
 381             /* last specified element is a device.  If it has exactly
 382              * one child bus accept it nevertheless */
 383             switch (dev->num_child_bus) {
 384             case 0:
 385                 qerror_report(QERR_DEVICE_NO_BUS, elem);
 386                 return NULL;
 387             case 1:
 388                 return QLIST_FIRST(&dev->child_bus);
 389             default:
 390                 qerror_report(QERR_DEVICE_MULTIPLE_BUSSES, elem);
 391                 if (!monitor_cur_is_qmp()) {
 392                     qbus_list_bus(dev);
 393                 }
 394                 return NULL;
 395             }
 396         }
 397
 398         /* find bus */
 399         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 400             assert(0);
 401             elem[0] = len = 0;
 402         }
 403         pos += len;
 404         bus = qbus_find_bus(dev, elem);
 405         if (!bus) {
 406             qerror_report(QERR_BUS_NOT_FOUND, elem);
 407             if (!monitor_cur_is_qmp()) {
 408                 qbus_list_bus(dev);
 409             }
 410             return NULL;
 411         }
 412     }
 413 }
 414
 415 DeviceState *qdev_device_add(QemuOpts *opts)
 416 {
 417     ObjectClass *obj;
 418     DeviceClass *k;
 419     const char *driver, *path, *id;
 420     DeviceState *qdev;
 421     BusState *bus = NULL;
 422
 423     driver = qemu_opt_get(opts, "driver");
 424     if (!driver) {
 425         qerror_report(QERR_MISSING_PARAMETER, "driver");
 426         return NULL;
 427     }
 428
 429     /* find driver */
 430     obj = object_class_by_name(driver);
 431     if (!obj) {
 432         const char *typename = find_typename_by_alias(driver);
 433
 434         if (typename) {
 435             driver = typename;
 436             obj = object_class_by_name(driver);
 437         }
 438     }
 439
 440     if (!obj) {
 441         qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver", "device type");
 442         return NULL;
 443     }
 444
 445     k = DEVICE_CLASS(obj);
 446
 447     /* find bus */
 448     path = qemu_opt_get(opts, "bus");
 449     if (path != NULL) {
 450         bus = qbus_find(path);
 451         if (!bus) {
 452             return NULL;
 453         }
 454         if (!object_dynamic_cast(OBJECT(bus), k->bus_type)) {
 455             qerror_report(QERR_BAD_BUS_FOR_DEVICE,
 456                           driver, object_get_typename(OBJECT(bus)));
 457             return NULL;
 458         }
 459     } else if (k->bus_type != NULL) {
 460         bus = qbus_find_recursive(sysbus_get_default(), NULL, k->bus_type);
 461         if (!bus) {
 462             qerror_report(QERR_NO_BUS_FOR_DEVICE,
 463                           k->bus_type, driver);
 464             return NULL;
 465         }
 466     }
 467     if (qdev_hotplug && bus && !bus->allow_hotplug) {
 468         qerror_report(QERR_BUS_NO_HOTPLUG, bus->name);
 469         return NULL;
 470     }
 471
 472     /* create device, set properties */
 473     qdev = DEVICE(object_new(driver));
 474
 475     if (bus) {
 476         qdev_set_parent_bus(qdev, bus);
 477     }
 478
 479     id = qemu_opts_id(opts);
 480     if (id) {
 481         qdev->id = id;
 482     }
 483     if (qemu_opt_foreach(opts, set_property, qdev, 1) != 0) {
 484         qdev_free(qdev);
 485         return NULL;
 486     }
 487     if (qdev->id) {
 488         object_property_add_child(qdev_get_peripheral(), qdev->id,
 489                                   OBJECT(qdev), NULL);
 490     } else {
 491         static int anon_count;
 492         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 493         object_property_add_child(qdev_get_peripheral_anon(), name,
 494                                   OBJECT(qdev), NULL);
 495         g_free(name);
 496     }
 497     if (qdev_init(qdev) < 0) {
 498         qerror_report(QERR_DEVICE_INIT_FAILED, driver);
 499         return NULL;
 500     }
 501     qdev->opts = opts;
 502     return qdev;
 503 }
 504
 505
 506 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 507 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 508
 509 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 510                              int indent)
 511 {
 512     if (!props)
 513         return;
 514     for (; props->name; props++) {
 515         Error *err = NULL;
 516         char *value;
 517         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 518         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 519             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 520         } else {
 521             value = object_property_print(OBJECT(dev), props->name, &err);
 522         }
 523         g_free(legacy_name);
 524
 525         if (err) {
 526             error_free(err);
 527             continue;
 528         }
 529         qdev_printf("%s = %s\n", props->name,
 530                     value && *value ? value : "<null>");
 531         g_free(value);
 532     }
 533 }
 534
 535 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 536 {
 537     BusClass *bc = BUS_GET_CLASS(bus);
 538
 539     if (bc->print_dev) {
 540         bc->print_dev(mon, dev, indent);
 541     }
 542 }
 543
 544 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 545 {
 546     ObjectClass *class;
 547     BusState *child;
 548     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 549                 dev->id ? dev->id : "");
 550     indent += 2;
 551     if (dev->num_gpio_in) {
 552         qdev_printf("gpio-in %d\n", dev->num_gpio_in);
 553     }
 554     if (dev->num_gpio_out) {
 555         qdev_printf("gpio-out %d\n", dev->num_gpio_out);
 556     }
 557     class = object_get_class(OBJECT(dev));
 558     do {
 559         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 560         class = object_class_get_parent(class);
 561     } while (class != object_class_by_name(TYPE_DEVICE));
 562     bus_print_dev(dev->parent_bus, mon, dev, indent);
 563     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 564         qbus_print(mon, child, indent);
 565     }
 566 }
 567
 568 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 569 {
 570     BusChild *kid;
 571
 572     qdev_printf("bus: %s\n", bus->name);
 573     indent += 2;
 574     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 575     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 576         DeviceState *dev = kid->child;
 577         qdev_print(mon, dev, indent);
 578     }
 579 }
 580 #undef qdev_printf
 581
 582 void do_info_qtree(Monitor *mon, const QDict *qdict)
 583 {
 584     if (sysbus_get_default())
 585         qbus_print(mon, sysbus_get_default(), 0);
 586 }
 587
 588 void do_info_qdm(Monitor *mon, const QDict *qdict)
 589 {
 590     object_class_foreach(qdev_print_devinfo, TYPE_DEVICE, false, NULL);
 591 }
 592
 593 int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
 594 {
 595     Error *local_err = NULL;
 596     QemuOpts *opts;
 597     DeviceState *dev;
 598
 599     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 600     if (error_is_set(&local_err)) {
 601         qerror_report_err(local_err);
 602         error_free(local_err);
 603         return -1;
 604     }
 605     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 606         qemu_opts_del(opts);
 607         return 0;
 608     }
 609     dev = qdev_device_add(opts);
 610     if (!dev) {
 611         qemu_opts_del(opts);
 612         return -1;
 613     }
 614     object_unref(OBJECT(dev));
 615     return 0;
 616 }
 617
 618 void qmp_device_del(const char *id, Error **errp)
 619 {
 620     DeviceState *dev;
 621
 622     dev = qdev_find_recursive(sysbus_get_default(), id);
 623     if (NULL == dev) {
 624         error_set(errp, QERR_DEVICE_NOT_FOUND, id);
 625         return;
 626     }
 627
 628     qdev_unplug(dev, errp);
 629 }
 630
 631 void qdev_machine_init(void)
 632 {
 633     qdev_get_peripheral_anon();
 634     qdev_get_peripheral();
 635 }
 636
 637 QemuOptsList qemu_device_opts = {
 638     .name = "device",
 639     .implied_opt_name = "driver",
 640     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 641     .desc = {
 642         /*
 643          * no elements => accept any
 644          * sanity checking will happen later
 645          * when setting device properties
 646          */
 647         { /* end of list */ }
 648     },
 649 };
 650
 651 QemuOptsList qemu_global_opts = {
 652     .name = "global",
 653     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 654     .desc = {
 655         {
 656             .name = "driver",
 657             .type = QEMU_OPT_STRING,
 658         },{
 659             .name = "property",
 660             .type = QEMU_OPT_STRING,
 661         },{
 662             .name = "value",
 663             .type = QEMU_OPT_STRING,
 664         },
 665         { /* end of list */ }
 666     },
 667 };
 668
 669 int qemu_global_option(const char *str)
 670 {
 671     char driver[64], property[64];
 672     QemuOpts *opts;
 673     int rc, offset;
 674
 675     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 676     if (rc < 2 || str[offset] != '=') {
 677         error_report("can't parse: \"%s\"", str);
 678         return -1;
 679     }
 680
 681     opts = qemu_opts_create_nofail(&qemu_global_opts);
 682     qemu_opt_set(opts, "driver", driver);
 683     qemu_opt_set(opts, "property", property);
 684     qemu_opt_set(opts, "value", str+offset+1);
 685     return 0;
 686 }