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/vnc.h"
  27 #include "sysemu/kvm.h"
  28 #include "sysemu/runstate.h"
  29 #include "sysemu/arch_init.h"
  30 #include "sysemu/blockdev.h"
  31 #include "sysemu/block-backend.h"
  32 #include "qapi/error.h"
  33 #include "qapi/qapi-commands-block.h"
  34 #include "qapi/qapi-commands-control.h"
  35 #include "qapi/qapi-commands-machine.h"
  36 #include "qapi/qapi-commands-misc.h"
  37 #include "qapi/qapi-commands-ui.h"
  38 #include "qapi/qmp/qerror.h"
  39 #include "hw/mem/memory-device.h"
  40 #include "hw/acpi/acpi_dev_interface.h"
  41
  42 NameInfo *qmp_query_name(Error **errp)
  43 {
  44     NameInfo *info = g_malloc0(sizeof(*info));
  45
  46     if (qemu_name) {
  47         info->has_name = true;
  48         info->name = g_strdup(qemu_name);
  49     }
  50
  51     return info;
  52 }
  53
  54 KvmInfo *qmp_query_kvm(Error **errp)
  55 {
  56     KvmInfo *info = g_malloc0(sizeof(*info));
  57
  58     info->enabled = kvm_enabled();
  59     info->present = kvm_available();
  60
  61     return info;
  62 }
  63
  64 UuidInfo *qmp_query_uuid(Error **errp)
  65 {
  66     UuidInfo *info = g_malloc0(sizeof(*info));
  67
  68     info->UUID = qemu_uuid_unparse_strdup(&qemu_uuid);
  69     return info;
  70 }
  71
  72 void qmp_quit(Error **errp)
  73 {
  74     no_shutdown = 0;
  75     qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_QMP_QUIT);
  76 }
  77
  78 void qmp_stop(Error **errp)
  79 {
  80     /* if there is a dump in background, we should wait until the dump
  81      * finished */
  82     if (dump_in_progress()) {
  83         error_setg(errp, "There is a dump in process, please wait.");
  84         return;
  85     }
  86
  87     if (runstate_check(RUN_STATE_INMIGRATE)) {
  88         autostart = 0;
  89     } else {
  90         vm_stop(RUN_STATE_PAUSED);
  91     }
  92 }
  93
  94 void qmp_system_reset(Error **errp)
  95 {
  96     qemu_system_reset_request(SHUTDOWN_CAUSE_HOST_QMP_SYSTEM_RESET);
  97 }
  98
  99 void qmp_system_powerdown(Error **errp)
 100 {
 101     qemu_system_powerdown_request();
 102 }
 103
 104 void qmp_x_exit_preconfig(Error **errp)
 105 {
 106     if (!runstate_check(RUN_STATE_PRECONFIG)) {
 107         error_setg(errp, "The command is permitted only in '%s' state",
 108                    RunState_str(RUN_STATE_PRECONFIG));
 109         return;
 110     }
 111     qemu_exit_preconfig_request();
 112 }
 113
 114 void qmp_cont(Error **errp)
 115 {
 116     BlockBackend *blk;
 117     BlockJob *job;
 118     Error *local_err = NULL;
 119
 120     /* if there is a dump in background, we should wait until the dump
 121      * finished */
 122     if (dump_in_progress()) {
 123         error_setg(errp, "There is a dump in process, please wait.");
 124         return;
 125     }
 126
 127     if (runstate_needs_reset()) {
 128         error_setg(errp, "Resetting the Virtual Machine is required");
 129         return;
 130     } else if (runstate_check(RUN_STATE_SUSPENDED)) {
 131         return;
 132     } else if (runstate_check(RUN_STATE_FINISH_MIGRATE)) {
 133         error_setg(errp, "Migration is not finalized yet");
 134         return;
 135     }
 136
 137     for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
 138         blk_iostatus_reset(blk);
 139     }
 140
 141     for (job = block_job_next(NULL); job; job = block_job_next(job)) {
 142         block_job_iostatus_reset(job);
 143     }
 144
 145     /* Continuing after completed migration. Images have been inactivated to
 146      * allow the destination to take control. Need to get control back now.
 147      *
 148      * If there are no inactive block nodes (e.g. because the VM was just
 149      * paused rather than completing a migration), bdrv_inactivate_all() simply
 150      * doesn't do anything. */
 151     bdrv_invalidate_cache_all(&local_err);
 152     if (local_err) {
 153         error_propagate(errp, local_err);
 154         return;
 155     }
 156
 157     if (runstate_check(RUN_STATE_INMIGRATE)) {
 158         autostart = 1;
 159     } else {
 160         vm_start();
 161     }
 162 }
 163
 164 void qmp_system_wakeup(Error **errp)
 165 {
 166     if (!qemu_wakeup_suspend_enabled()) {
 167         error_setg(errp,
 168                    "wake-up from suspend is not supported by this guest");
 169         return;
 170     }
 171
 172     qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, errp);
 173 }
 174
 175 void qmp_set_password(const char *protocol, const char *password,
 176                       bool has_connected, const char *connected, Error **errp)
 177 {
 178     int disconnect_if_connected = 0;
 179     int fail_if_connected = 0;
 180     int rc;
 181
 182     if (has_connected) {
 183         if (strcmp(connected, "fail") == 0) {
 184             fail_if_connected = 1;
 185         } else if (strcmp(connected, "disconnect") == 0) {
 186             disconnect_if_connected = 1;
 187         } else if (strcmp(connected, "keep") == 0) {
 188             /* nothing */
 189         } else {
 190             error_setg(errp, QERR_INVALID_PARAMETER, "connected");
 191             return;
 192         }
 193     }
 194
 195     if (strcmp(protocol, "spice") == 0) {
 196         if (!qemu_using_spice(errp)) {
 197             return;
 198         }
 199         rc = qemu_spice_set_passwd(password, fail_if_connected,
 200                                    disconnect_if_connected);
 201         if (rc != 0) {
 202             error_setg(errp, QERR_SET_PASSWD_FAILED);
 203         }
 204         return;
 205     }
 206
 207     if (strcmp(protocol, "vnc") == 0) {
 208         if (fail_if_connected || disconnect_if_connected) {
 209             /* vnc supports "connected=keep" only */
 210             error_setg(errp, QERR_INVALID_PARAMETER, "connected");
 211             return;
 212         }
 213         /* Note that setting an empty password will not disable login through
 214          * this interface. */
 215         rc = vnc_display_password(NULL, password);
 216         if (rc < 0) {
 217             error_setg(errp, QERR_SET_PASSWD_FAILED);
 218         }
 219         return;
 220     }
 221
 222     error_setg(errp, QERR_INVALID_PARAMETER, "protocol");
 223 }
 224
 225 void qmp_expire_password(const char *protocol, const char *whenstr,
 226                          Error **errp)
 227 {
 228     time_t when;
 229     int rc;
 230
 231     if (strcmp(whenstr, "now") == 0) {
 232         when = 0;
 233     } else if (strcmp(whenstr, "never") == 0) {
 234         when = TIME_MAX;
 235     } else if (whenstr[0] == '+') {
 236         when = time(NULL) + strtoull(whenstr+1, NULL, 10);
 237     } else {
 238         when = strtoull(whenstr, NULL, 10);
 239     }
 240
 241     if (strcmp(protocol, "spice") == 0) {
 242         if (!qemu_using_spice(errp)) {
 243             return;
 244         }
 245         rc = qemu_spice_set_pw_expire(when);
 246         if (rc != 0) {
 247             error_setg(errp, QERR_SET_PASSWD_FAILED);
 248         }
 249         return;
 250     }
 251
 252     if (strcmp(protocol, "vnc") == 0) {
 253         rc = vnc_display_pw_expire(NULL, when);
 254         if (rc != 0) {
 255             error_setg(errp, QERR_SET_PASSWD_FAILED);
 256         }
 257         return;
 258     }
 259
 260     error_setg(errp, QERR_INVALID_PARAMETER, "protocol");
 261 }
 262
 263 #ifdef CONFIG_VNC
 264 void qmp_change_vnc_password(const char *password, Error **errp)
 265 {
 266     if (vnc_display_password(NULL, password) < 0) {
 267         error_setg(errp, QERR_SET_PASSWD_FAILED);
 268     }
 269 }
 270
 271 static void qmp_change_vnc_listen(const char *target, Error **errp)
 272 {
 273     QemuOptsList *olist = qemu_find_opts("vnc");
 274     QemuOpts *opts;
 275
 276     if (strstr(target, "id=")) {
 277         error_setg(errp, "id not supported");
 278         return;
 279     }
 280
 281     opts = qemu_opts_find(olist, "default");
 282     if (opts) {
 283         qemu_opts_del(opts);
 284     }
 285     opts = vnc_parse(target, errp);
 286     if (!opts) {
 287         return;
 288     }
 289
 290     vnc_display_open("default", errp);
 291 }
 292
 293 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 294                            Error **errp)
 295 {
 296     if (strcmp(target, "passwd") == 0 || strcmp(target, "password") == 0) {
 297         if (!has_arg) {
 298             error_setg(errp, QERR_MISSING_PARAMETER, "password");
 299         } else {
 300             qmp_change_vnc_password(arg, errp);
 301         }
 302     } else {
 303         qmp_change_vnc_listen(target, errp);
 304     }
 305 }
 306 #endif /* !CONFIG_VNC */
 307
 308 void qmp_change(const char *device, const char *target,
 309                 bool has_arg, const char *arg, Error **errp)
 310 {
 311     if (strcmp(device, "vnc") == 0) {
 312 #ifdef CONFIG_VNC
 313         qmp_change_vnc(target, has_arg, arg, errp);
 314 #else
 315         error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
 316 #endif
 317     } else {
 318         qmp_blockdev_change_medium(true, device, false, NULL, target,
 319                                    has_arg, arg, false, 0, errp);
 320     }
 321 }
 322
 323 void qmp_add_client(const char *protocol, const char *fdname,
 324                     bool has_skipauth, bool skipauth, bool has_tls, bool tls,
 325                     Error **errp)
 326 {
 327     Chardev *s;
 328     int fd;
 329
 330     fd = monitor_get_fd(cur_mon, fdname, errp);
 331     if (fd < 0) {
 332         return;
 333     }
 334
 335     if (strcmp(protocol, "spice") == 0) {
 336         if (!qemu_using_spice(errp)) {
 337             close(fd);
 338             return;
 339         }
 340         skipauth = has_skipauth ? skipauth : false;
 341         tls = has_tls ? tls : false;
 342         if (qemu_spice_display_add_client(fd, skipauth, tls) < 0) {
 343             error_setg(errp, "spice failed to add client");
 344             close(fd);
 345         }
 346         return;
 347 #ifdef CONFIG_VNC
 348     } else if (strcmp(protocol, "vnc") == 0) {
 349         skipauth = has_skipauth ? skipauth : false;
 350         vnc_display_add_client(NULL, fd, skipauth);
 351         return;
 352 #endif
 353     } else if ((s = qemu_chr_find(protocol)) != NULL) {
 354         if (qemu_chr_add_client(s, fd) < 0) {
 355             error_setg(errp, "failed to add client");
 356             close(fd);
 357             return;
 358         }
 359         return;
 360     }
 361
 362     error_setg(errp, "protocol '%s' is invalid", protocol);
 363     close(fd);
 364 }
 365
 366
 367 MemoryDeviceInfoList *qmp_query_memory_devices(Error **errp)
 368 {
 369     return qmp_memory_device_list();
 370 }
 371
 372 ACPIOSTInfoList *qmp_query_acpi_ospm_status(Error **errp)
 373 {
 374     bool ambig;
 375     ACPIOSTInfoList *head = NULL;
 376     ACPIOSTInfoList **prev = &head;
 377     Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, &ambig);
 378
 379     if (obj) {
 380         AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj);
 381         AcpiDeviceIf *adev = ACPI_DEVICE_IF(obj);
 382
 383         adevc->ospm_status(adev, &prev);
 384     } else {
 385         error_setg(errp, "command is not supported, missing ACPI device");
 386     }
 387
 388     return head;
 389 }
 390
 391 MemoryInfo *qmp_query_memory_size_summary(Error **errp)
 392 {
 393     MemoryInfo *mem_info = g_malloc0(sizeof(MemoryInfo));
 394
 395     mem_info->base_memory = ram_size;
 396
 397     mem_info->plugged_memory = get_plugged_memory_size();
 398     mem_info->has_plugged_memory =
 399         mem_info->plugged_memory != (uint64_t)-1;
 400
 401     return mem_info;
 402 }