monitor/qmp-cmds.c

   1 /*
   2  * QEMU Management Protocol commands
   3  *
   4  * Copyright IBM, Corp. 2011
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2.  See
  10  * the COPYING file in the top-level directory.
  11  *
  12  * Contributions after 2012-01-13 are licensed under the terms of the
  13  * GNU GPL, version 2 or (at your option) any later version.
  14  */
  15
  16 #include "qemu/osdep.h"
  17 #include "qemu/cutils.h"
  18 #include "qemu/option.h"
  19 #include "monitor/monitor.h"
  20 #include "sysemu/sysemu.h"
  21 #include "qemu/config-file.h"
  22 #include "qemu/uuid.h"
  23 #include "chardev/char.h"
  24 #include "ui/qemu-spice.h"
  25 #include "ui/console.h"
  26 #include "ui/dbus-display.h"
  27 #include "sysemu/kvm.h"
  28 #include "sysemu/runstate.h"
  29 #include "sysemu/runstate-action.h"
  30 #include "sysemu/blockdev.h"
  31 #include "sysemu/block-backend.h"
  32 #include "qapi/error.h"
  33 #include "qapi/qapi-commands-acpi.h"
  34 #include "qapi/qapi-commands-block.h"
  35 #include "qapi/qapi-commands-control.h"
  36 #include "qapi/qapi-commands-machine.h"
  37 #include "qapi/qapi-commands-misc.h"
  38 #include "qapi/qapi-commands-ui.h"
  39 #include "qapi/type-helpers.h"
  40 #include "qapi/qmp/qerror.h"
  41 #include "exec/ramlist.h"
  42 #include "hw/mem/memory-device.h"
  43 #include "hw/acpi/acpi_dev_interface.h"
  44 #include "hw/intc/intc.h"
  45 #include "hw/rdma/rdma.h"
  46
  47 NameInfo *qmp_query_name(Error **errp)
  48 {
  49     NameInfo *info = g_malloc0(sizeof(*info));
  50
  51     if (qemu_name) {
  52         info->has_name = true;
  53         info->name = g_strdup(qemu_name);
  54     }
  55
  56     return info;
  57 }
  58
  59 KvmInfo *qmp_query_kvm(Error **errp)
  60 {
  61     KvmInfo *info = g_malloc0(sizeof(*info));
  62
  63     info->enabled = kvm_enabled();
  64     info->present = accel_find("kvm");
  65
  66     return info;
  67 }
  68
  69 UuidInfo *qmp_query_uuid(Error **errp)
  70 {
  71     UuidInfo *info = g_malloc0(sizeof(*info));
  72
  73     info->UUID = qemu_uuid_unparse_strdup(&qemu_uuid);
  74     return info;
  75 }
  76
  77 void qmp_quit(Error **errp)
  78 {
  79     shutdown_action = SHUTDOWN_ACTION_POWEROFF;
  80     qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_QMP_QUIT);
  81 }
  82
  83 void qmp_stop(Error **errp)
  84 {
  85     /* if there is a dump in background, we should wait until the dump
  86      * finished */
  87     if (qemu_system_dump_in_progress()) {
  88         error_setg(errp, "There is a dump in process, please wait.");
  89         return;
  90     }
  91
  92     if (runstate_check(RUN_STATE_INMIGRATE)) {
  93         autostart = 0;
  94     } else {
  95         vm_stop(RUN_STATE_PAUSED);
  96     }
  97 }
  98
  99 void qmp_system_reset(Error **errp)
 100 {
 101     qemu_system_reset_request(SHUTDOWN_CAUSE_HOST_QMP_SYSTEM_RESET);
 102 }
 103
 104 void qmp_system_powerdown(Error **errp)
 105 {
 106     qemu_system_powerdown_request();
 107 }
 108
 109 void qmp_cont(Error **errp)
 110 {
 111     BlockBackend *blk;
 112     BlockJob *job;
 113     Error *local_err = NULL;
 114
 115     /* if there is a dump in background, we should wait until the dump
 116      * finished */
 117     if (qemu_system_dump_in_progress()) {
 118         error_setg(errp, "There is a dump in process, please wait.");
 119         return;
 120     }
 121
 122     if (runstate_needs_reset()) {
 123         error_setg(errp, "Resetting the Virtual Machine is required");
 124         return;
 125     } else if (runstate_check(RUN_STATE_SUSPENDED)) {
 126         return;
 127     } else if (runstate_check(RUN_STATE_FINISH_MIGRATE)) {
 128         error_setg(errp, "Migration is not finalized yet");
 129         return;
 130     }
 131
 132     for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
 133         blk_iostatus_reset(blk);
 134     }
 135
 136     for (job = block_job_next(NULL); job; job = block_job_next(job)) {
 137         block_job_iostatus_reset(job);
 138     }
 139
 140     /* Continuing after completed migration. Images have been inactivated to
 141      * allow the destination to take control. Need to get control back now.
 142      *
 143      * If there are no inactive block nodes (e.g. because the VM was just
 144      * paused rather than completing a migration), bdrv_inactivate_all() simply
 145      * doesn't do anything. */
 146     bdrv_activate_all(&local_err);
 147     if (local_err) {
 148         error_propagate(errp, local_err);
 149         return;
 150     }
 151
 152     if (runstate_check(RUN_STATE_INMIGRATE)) {
 153         autostart = 1;
 154     } else {
 155         vm_start();
 156     }
 157 }
 158
 159 void qmp_system_wakeup(Error **errp)
 160 {
 161     if (!qemu_wakeup_suspend_enabled()) {
 162         error_setg(errp,
 163                    "wake-up from suspend is not supported by this guest");
 164         return;
 165     }
 166
 167     qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, errp);
 168 }
 169
 170 void qmp_set_password(SetPasswordOptions *opts, Error **errp)
 171 {
 172     int rc;
 173
 174     if (opts->protocol == DISPLAY_PROTOCOL_SPICE) {
 175         if (!qemu_using_spice(errp)) {
 176             return;
 177         }
 178         rc = qemu_spice.set_passwd(opts->password,
 179                 opts->connected == SET_PASSWORD_ACTION_FAIL,
 180                 opts->connected == SET_PASSWORD_ACTION_DISCONNECT);
 181     } else {
 182         assert(opts->protocol == DISPLAY_PROTOCOL_VNC);
 183         if (opts->connected != SET_PASSWORD_ACTION_KEEP) {
 184             /* vnc supports "connected=keep" only */
 185             error_setg(errp, QERR_INVALID_PARAMETER, "connected");
 186             return;
 187         }
 188         /* Note that setting an empty password will not disable login through
 189          * this interface. */
 190         rc = vnc_display_password(opts->u.vnc.display, opts->password);
 191     }
 192
 193     if (rc != 0) {
 194         error_setg(errp, "Could not set password");
 195     }
 196 }
 197
 198 void qmp_expire_password(ExpirePasswordOptions *opts, Error **errp)
 199 {
 200     time_t when;
 201     int rc;
 202     const char *whenstr = opts->time;
 203
 204     if (strcmp(whenstr, "now") == 0) {
 205         when = 0;
 206     } else if (strcmp(whenstr, "never") == 0) {
 207         when = TIME_MAX;
 208     } else if (whenstr[0] == '+') {
 209         when = time(NULL) + strtoull(whenstr+1, NULL, 10);
 210     } else {
 211         when = strtoull(whenstr, NULL, 10);
 212     }
 213
 214     if (opts->protocol == DISPLAY_PROTOCOL_SPICE) {
 215         if (!qemu_using_spice(errp)) {
 216             return;
 217         }
 218         rc = qemu_spice.set_pw_expire(when);
 219     } else {
 220         assert(opts->protocol == DISPLAY_PROTOCOL_VNC);
 221         rc = vnc_display_pw_expire(opts->u.vnc.display, when);
 222     }
 223
 224     if (rc != 0) {
 225         error_setg(errp, "Could not set password expire time");
 226     }
 227 }
 228
 229 #ifdef CONFIG_VNC
 230 void qmp_change_vnc_password(const char *password, Error **errp)
 231 {
 232     if (vnc_display_password(NULL, password) < 0) {
 233         error_setg(errp, "Could not set password");
 234     }
 235 }
 236 #endif
 237
 238 void qmp_add_client(const char *protocol, const char *fdname,
 239                     bool has_skipauth, bool skipauth, bool has_tls, bool tls,
 240                     Error **errp)
 241 {
 242     Chardev *s;
 243     int fd;
 244
 245     fd = monitor_get_fd(monitor_cur(), fdname, errp);
 246     if (fd < 0) {
 247         return;
 248     }
 249
 250     if (strcmp(protocol, "spice") == 0) {
 251         if (!qemu_using_spice(errp)) {
 252             close(fd);
 253             return;
 254         }
 255         skipauth = has_skipauth ? skipauth : false;
 256         tls = has_tls ? tls : false;
 257         if (qemu_spice.display_add_client(fd, skipauth, tls) < 0) {
 258             error_setg(errp, "spice failed to add client");
 259             close(fd);
 260         }
 261         return;
 262 #ifdef CONFIG_VNC
 263     } else if (strcmp(protocol, "vnc") == 0) {
 264         skipauth = has_skipauth ? skipauth : false;
 265         vnc_display_add_client(NULL, fd, skipauth);
 266         return;
 267 #endif
 268 #ifdef CONFIG_DBUS_DISPLAY
 269     } else if (strcmp(protocol, "@dbus-display") == 0) {
 270         if (!qemu_using_dbus_display(errp)) {
 271             close(fd);
 272             return;
 273         }
 274         if (!qemu_dbus_display.add_client(fd, errp)) {
 275             close(fd);
 276             return;
 277         }
 278         return;
 279 #endif
 280     } else if ((s = qemu_chr_find(protocol)) != NULL) {
 281         if (qemu_chr_add_client(s, fd) < 0) {
 282             error_setg(errp, "failed to add client");
 283             close(fd);
 284             return;
 285         }
 286         return;
 287     }
 288
 289     error_setg(errp, "protocol '%s' is invalid", protocol);
 290     close(fd);
 291 }
 292
 293
 294 MemoryDeviceInfoList *qmp_query_memory_devices(Error **errp)
 295 {
 296     return qmp_memory_device_list();
 297 }
 298
 299 ACPIOSTInfoList *qmp_query_acpi_ospm_status(Error **errp)
 300 {
 301     bool ambig;
 302     ACPIOSTInfoList *head = NULL;
 303     ACPIOSTInfoList **prev = &head;
 304     Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, &ambig);
 305
 306     if (obj) {
 307         AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj);
 308         AcpiDeviceIf *adev = ACPI_DEVICE_IF(obj);
 309
 310         adevc->ospm_status(adev, &prev);
 311     } else {
 312         error_setg(errp, "command is not supported, missing ACPI device");
 313     }
 314
 315     return head;
 316 }
 317
 318 MemoryInfo *qmp_query_memory_size_summary(Error **errp)
 319 {
 320     MemoryInfo *mem_info = g_new0(MemoryInfo, 1);
 321     MachineState *ms = MACHINE(qdev_get_machine());
 322
 323     mem_info->base_memory = ms->ram_size;
 324
 325     mem_info->plugged_memory = get_plugged_memory_size();
 326     mem_info->has_plugged_memory =
 327         mem_info->plugged_memory != (uint64_t)-1;
 328
 329     return mem_info;
 330 }
 331
 332 void qmp_display_reload(DisplayReloadOptions *arg, Error **errp)
 333 {
 334     switch (arg->type) {
 335     case DISPLAY_RELOAD_TYPE_VNC:
 336 #ifdef CONFIG_VNC
 337         if (arg->u.vnc.has_tls_certs && arg->u.vnc.tls_certs) {
 338             vnc_display_reload_certs(NULL, errp);
 339         }
 340 #else
 341         error_setg(errp, "vnc is invalid, missing 'CONFIG_VNC'");
 342 #endif
 343         break;
 344     default:
 345         abort();
 346     }
 347 }
 348
 349 void qmp_display_update(DisplayUpdateOptions *arg, Error **errp)
 350 {
 351     switch (arg->type) {
 352     case DISPLAY_UPDATE_TYPE_VNC:
 353 #ifdef CONFIG_VNC
 354         vnc_display_update(&arg->u.vnc, errp);
 355 #else
 356         error_setg(errp, "vnc is invalid, missing 'CONFIG_VNC'");
 357 #endif
 358         break;
 359     default:
 360         abort();
 361     }
 362 }
 363
 364 static int qmp_x_query_rdma_foreach(Object *obj, void *opaque)
 365 {
 366     RdmaProvider *rdma;
 367     RdmaProviderClass *k;
 368     GString *buf = opaque;
 369
 370     if (object_dynamic_cast(obj, INTERFACE_RDMA_PROVIDER)) {
 371         rdma = RDMA_PROVIDER(obj);
 372         k = RDMA_PROVIDER_GET_CLASS(obj);
 373         if (k->format_statistics) {
 374             k->format_statistics(rdma, buf);
 375         } else {
 376             g_string_append_printf(buf,
 377                                    "RDMA statistics not available for %s.\n",
 378                                    object_get_typename(obj));
 379         }
 380     }
 381
 382     return 0;
 383 }
 384
 385 HumanReadableText *qmp_x_query_rdma(Error **errp)
 386 {
 387     g_autoptr(GString) buf = g_string_new("");
 388
 389     object_child_foreach_recursive(object_get_root(),
 390                                    qmp_x_query_rdma_foreach, buf);
 391
 392     return human_readable_text_from_str(buf);
 393 }
 394
 395 HumanReadableText *qmp_x_query_ramblock(Error **errp)
 396 {
 397     g_autoptr(GString) buf = ram_block_format();
 398
 399     return human_readable_text_from_str(buf);
 400 }
 401
 402 static int qmp_x_query_irq_foreach(Object *obj, void *opaque)
 403 {
 404     InterruptStatsProvider *intc;
 405     InterruptStatsProviderClass *k;
 406     GString *buf = opaque;
 407
 408     if (object_dynamic_cast(obj, TYPE_INTERRUPT_STATS_PROVIDER)) {
 409         intc = INTERRUPT_STATS_PROVIDER(obj);
 410         k = INTERRUPT_STATS_PROVIDER_GET_CLASS(obj);
 411         uint64_t *irq_counts;
 412         unsigned int nb_irqs, i;
 413         if (k->get_statistics &&
 414             k->get_statistics(intc, &irq_counts, &nb_irqs)) {
 415             if (nb_irqs > 0) {
 416                 g_string_append_printf(buf, "IRQ statistics for %s:\n",
 417                                        object_get_typename(obj));
 418                 for (i = 0; i < nb_irqs; i++) {
 419                     if (irq_counts[i] > 0) {
 420                         g_string_append_printf(buf, "%2d: %" PRId64 "\n", i,
 421                                                irq_counts[i]);
 422                     }
 423                 }
 424             }
 425         } else {
 426             g_string_append_printf(buf,
 427                                    "IRQ statistics not available for %s.\n",
 428                                    object_get_typename(obj));
 429         }
 430     }
 431
 432     return 0;
 433 }
 434
 435 HumanReadableText *qmp_x_query_irq(Error **errp)
 436 {
 437     g_autoptr(GString) buf = g_string_new("");
 438
 439     object_child_foreach_recursive(object_get_root(),
 440                                    qmp_x_query_irq_foreach, buf);
 441
 442     return human_readable_text_from_str(buf);
 443 }