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-common.h"
  18 #include "qemu/cutils.h"
  19 #include "qemu/option.h"
  20 #include "monitor/monitor.h"
  21 #include "sysemu/sysemu.h"
  22 #include "qemu/config-file.h"
  23 #include "qemu/uuid.h"
  24 #include "chardev/char.h"
  25 #include "ui/qemu-spice.h"
  26 #include "ui/console.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 (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 (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_invalidate_cache_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(const char *protocol, const char *password,
 171                       bool has_connected, const char *connected, Error **errp)
 172 {
 173     int disconnect_if_connected = 0;
 174     int fail_if_connected = 0;
 175     int rc;
 176
 177     if (has_connected) {
 178         if (strcmp(connected, "fail") == 0) {
 179             fail_if_connected = 1;
 180         } else if (strcmp(connected, "disconnect") == 0) {
 181             disconnect_if_connected = 1;
 182         } else if (strcmp(connected, "keep") == 0) {
 183             /* nothing */
 184         } else {
 185             error_setg(errp, QERR_INVALID_PARAMETER, "connected");
 186             return;
 187         }
 188     }
 189
 190     if (strcmp(protocol, "spice") == 0) {
 191         if (!qemu_using_spice(errp)) {
 192             return;
 193         }
 194         rc = qemu_spice.set_passwd(password, fail_if_connected,
 195                                    disconnect_if_connected);
 196     } else if (strcmp(protocol, "vnc") == 0) {
 197         if (fail_if_connected || disconnect_if_connected) {
 198             /* vnc supports "connected=keep" only */
 199             error_setg(errp, QERR_INVALID_PARAMETER, "connected");
 200             return;
 201         }
 202         /* Note that setting an empty password will not disable login through
 203          * this interface. */
 204         rc = vnc_display_password(NULL, password);
 205     } else {
 206         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "protocol",
 207                    "'vnc' or 'spice'");
 208         return;
 209     }
 210
 211     if (rc != 0) {
 212         error_setg(errp, "Could not set password");
 213     }
 214 }
 215
 216 void qmp_expire_password(const char *protocol, const char *whenstr,
 217                          Error **errp)
 218 {
 219     time_t when;
 220     int rc;
 221
 222     if (strcmp(whenstr, "now") == 0) {
 223         when = 0;
 224     } else if (strcmp(whenstr, "never") == 0) {
 225         when = TIME_MAX;
 226     } else if (whenstr[0] == '+') {
 227         when = time(NULL) + strtoull(whenstr+1, NULL, 10);
 228     } else {
 229         when = strtoull(whenstr, NULL, 10);
 230     }
 231
 232     if (strcmp(protocol, "spice") == 0) {
 233         if (!qemu_using_spice(errp)) {
 234             return;
 235         }
 236         rc = qemu_spice.set_pw_expire(when);
 237     } else if (strcmp(protocol, "vnc") == 0) {
 238         rc = vnc_display_pw_expire(NULL, when);
 239     } else {
 240         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "protocol",
 241                    "'vnc' or 'spice'");
 242         return;
 243     }
 244
 245     if (rc != 0) {
 246         error_setg(errp, "Could not set password expire time");
 247     }
 248 }
 249
 250 #ifdef CONFIG_VNC
 251 void qmp_change_vnc_password(const char *password, Error **errp)
 252 {
 253     if (vnc_display_password(NULL, password) < 0) {
 254         error_setg(errp, "Could not set password");
 255     }
 256 }
 257 #endif
 258
 259 void qmp_add_client(const char *protocol, const char *fdname,
 260                     bool has_skipauth, bool skipauth, bool has_tls, bool tls,
 261                     Error **errp)
 262 {
 263     Chardev *s;
 264     int fd;
 265
 266     fd = monitor_get_fd(monitor_cur(), fdname, errp);
 267     if (fd < 0) {
 268         return;
 269     }
 270
 271     if (strcmp(protocol, "spice") == 0) {
 272         if (!qemu_using_spice(errp)) {
 273             close(fd);
 274             return;
 275         }
 276         skipauth = has_skipauth ? skipauth : false;
 277         tls = has_tls ? tls : false;
 278         if (qemu_spice.display_add_client(fd, skipauth, tls) < 0) {
 279             error_setg(errp, "spice failed to add client");
 280             close(fd);
 281         }
 282         return;
 283 #ifdef CONFIG_VNC
 284     } else if (strcmp(protocol, "vnc") == 0) {
 285         skipauth = has_skipauth ? skipauth : false;
 286         vnc_display_add_client(NULL, fd, skipauth);
 287         return;
 288 #endif
 289     } else if ((s = qemu_chr_find(protocol)) != NULL) {
 290         if (qemu_chr_add_client(s, fd) < 0) {
 291             error_setg(errp, "failed to add client");
 292             close(fd);
 293             return;
 294         }
 295         return;
 296     }
 297
 298     error_setg(errp, "protocol '%s' is invalid", protocol);
 299     close(fd);
 300 }
 301
 302
 303 MemoryDeviceInfoList *qmp_query_memory_devices(Error **errp)
 304 {
 305     return qmp_memory_device_list();
 306 }
 307
 308 ACPIOSTInfoList *qmp_query_acpi_ospm_status(Error **errp)
 309 {
 310     bool ambig;
 311     ACPIOSTInfoList *head = NULL;
 312     ACPIOSTInfoList **prev = &head;
 313     Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, &ambig);
 314
 315     if (obj) {
 316         AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj);
 317         AcpiDeviceIf *adev = ACPI_DEVICE_IF(obj);
 318
 319         adevc->ospm_status(adev, &prev);
 320     } else {
 321         error_setg(errp, "command is not supported, missing ACPI device");
 322     }
 323
 324     return head;
 325 }
 326
 327 MemoryInfo *qmp_query_memory_size_summary(Error **errp)
 328 {
 329     MemoryInfo *mem_info = g_malloc0(sizeof(MemoryInfo));
 330     MachineState *ms = MACHINE(qdev_get_machine());
 331
 332     mem_info->base_memory = ms->ram_size;
 333
 334     mem_info->plugged_memory = get_plugged_memory_size();
 335     mem_info->has_plugged_memory =
 336         mem_info->plugged_memory != (uint64_t)-1;
 337
 338     return mem_info;
 339 }
 340
 341 void qmp_display_reload(DisplayReloadOptions *arg, Error **errp)
 342 {
 343     switch (arg->type) {
 344     case DISPLAY_RELOAD_TYPE_VNC:
 345 #ifdef CONFIG_VNC
 346         if (arg->u.vnc.has_tls_certs && arg->u.vnc.tls_certs) {
 347             vnc_display_reload_certs(NULL, errp);
 348         }
 349 #else
 350         error_setg(errp, "vnc is invalid, missing 'CONFIG_VNC'");
 351 #endif
 352         break;
 353     default:
 354         abort();
 355     }
 356 }
 357
 358 #ifdef CONFIG_PROFILER
 359
 360 int64_t dev_time;
 361
 362 HumanReadableText *qmp_x_query_profile(Error **errp)
 363 {
 364     g_autoptr(GString) buf = g_string_new("");
 365     static int64_t last_cpu_exec_time;
 366     int64_t cpu_exec_time;
 367     int64_t delta;
 368
 369     cpu_exec_time = tcg_cpu_exec_time();
 370     delta = cpu_exec_time - last_cpu_exec_time;
 371
 372     g_string_append_printf(buf, "async time  %" PRId64 " (%0.3f)\n",
 373                            dev_time, dev_time / (double)NANOSECONDS_PER_SECOND);
 374     g_string_append_printf(buf, "qemu time   %" PRId64 " (%0.3f)\n",
 375                            delta, delta / (double)NANOSECONDS_PER_SECOND);
 376     last_cpu_exec_time = cpu_exec_time;
 377     dev_time = 0;
 378
 379     return human_readable_text_from_str(buf);
 380 }
 381 #else
 382 HumanReadableText *qmp_x_query_profile(Error **errp)
 383 {
 384     error_setg(errp, "Internal profiler not compiled");
 385     return NULL;
 386 }
 387 #endif
 388
 389 static int qmp_x_query_rdma_foreach(Object *obj, void *opaque)
 390 {
 391     RdmaProvider *rdma;
 392     RdmaProviderClass *k;
 393     GString *buf = opaque;
 394
 395     if (object_dynamic_cast(obj, INTERFACE_RDMA_PROVIDER)) {
 396         rdma = RDMA_PROVIDER(obj);
 397         k = RDMA_PROVIDER_GET_CLASS(obj);
 398         if (k->format_statistics) {
 399             k->format_statistics(rdma, buf);
 400         } else {
 401             g_string_append_printf(buf,
 402                                    "RDMA statistics not available for %s.\n",
 403                                    object_get_typename(obj));
 404         }
 405     }
 406
 407     return 0;
 408 }
 409
 410 HumanReadableText *qmp_x_query_rdma(Error **errp)
 411 {
 412     g_autoptr(GString) buf = g_string_new("");
 413
 414     object_child_foreach_recursive(object_get_root(),
 415                                    qmp_x_query_rdma_foreach, buf);
 416
 417     return human_readable_text_from_str(buf);
 418 }
 419
 420 HumanReadableText *qmp_x_query_ramblock(Error **errp)
 421 {
 422     g_autoptr(GString) buf = ram_block_format();
 423
 424     return human_readable_text_from_str(buf);
 425 }
 426
 427 static int qmp_x_query_irq_foreach(Object *obj, void *opaque)
 428 {
 429     InterruptStatsProvider *intc;
 430     InterruptStatsProviderClass *k;
 431     GString *buf = opaque;
 432
 433     if (object_dynamic_cast(obj, TYPE_INTERRUPT_STATS_PROVIDER)) {
 434         intc = INTERRUPT_STATS_PROVIDER(obj);
 435         k = INTERRUPT_STATS_PROVIDER_GET_CLASS(obj);
 436         uint64_t *irq_counts;
 437         unsigned int nb_irqs, i;
 438         if (k->get_statistics &&
 439             k->get_statistics(intc, &irq_counts, &nb_irqs)) {
 440             if (nb_irqs > 0) {
 441                 g_string_append_printf(buf, "IRQ statistics for %s:\n",
 442                                        object_get_typename(obj));
 443                 for (i = 0; i < nb_irqs; i++) {
 444                     if (irq_counts[i] > 0) {
 445                         g_string_append_printf(buf, "%2d: %" PRId64 "\n", i,
 446                                                irq_counts[i]);
 447                     }
 448                 }
 449             }
 450         } else {
 451             g_string_append_printf(buf,
 452                                    "IRQ statistics not available for %s.\n",
 453                                    object_get_typename(obj));
 454         }
 455     }
 456
 457     return 0;
 458 }
 459
 460 HumanReadableText *qmp_x_query_irq(Error **errp)
 461 {
 462     g_autoptr(GString) buf = g_string_new("");
 463
 464     object_child_foreach_recursive(object_get_root(),
 465                                    qmp_x_query_irq_foreach, buf);
 466
 467     return human_readable_text_from_str(buf);
 468 }