qmp.c

   1 /*
   2  * QEMU Management Protocol
   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-common.h"
  17 #include "sysemu.h"
  18 #include "qmp-commands.h"
  19 #include "ui/qemu-spice.h"
  20 #include "ui/vnc.h"
  21 #include "kvm.h"
  22 #include "arch_init.h"
  23 #include "hw/qdev.h"
  24 #include "blockdev.h"
  25 #include "qemu/qom-qobject.h"
  26
  27 NameInfo *qmp_query_name(Error **errp)
  28 {
  29     NameInfo *info = g_malloc0(sizeof(*info));
  30
  31     if (qemu_name) {
  32         info->has_name = true;
  33         info->name = g_strdup(qemu_name);
  34     }
  35
  36     return info;
  37 }
  38
  39 VersionInfo *qmp_query_version(Error **err)
  40 {
  41     VersionInfo *info = g_malloc0(sizeof(*info));
  42     const char *version = QEMU_VERSION;
  43     char *tmp;
  44
  45     info->qemu.major = strtol(version, &tmp, 10);
  46     tmp++;
  47     info->qemu.minor = strtol(tmp, &tmp, 10);
  48     tmp++;
  49     info->qemu.micro = strtol(tmp, &tmp, 10);
  50     info->package = g_strdup(QEMU_PKGVERSION);
  51
  52     return info;
  53 }
  54
  55 KvmInfo *qmp_query_kvm(Error **errp)
  56 {
  57     KvmInfo *info = g_malloc0(sizeof(*info));
  58
  59     info->enabled = kvm_enabled();
  60     info->present = kvm_available();
  61
  62     return info;
  63 }
  64
  65 UuidInfo *qmp_query_uuid(Error **errp)
  66 {
  67     UuidInfo *info = g_malloc0(sizeof(*info));
  68     char uuid[64];
  69
  70     snprintf(uuid, sizeof(uuid), UUID_FMT, qemu_uuid[0], qemu_uuid[1],
  71                    qemu_uuid[2], qemu_uuid[3], qemu_uuid[4], qemu_uuid[5],
  72                    qemu_uuid[6], qemu_uuid[7], qemu_uuid[8], qemu_uuid[9],
  73                    qemu_uuid[10], qemu_uuid[11], qemu_uuid[12], qemu_uuid[13],
  74                    qemu_uuid[14], qemu_uuid[15]);
  75
  76     info->UUID = g_strdup(uuid);
  77     return info;
  78 }
  79
  80 void qmp_quit(Error **err)
  81 {
  82     no_shutdown = 0;
  83     qemu_system_shutdown_request();
  84 }
  85
  86 void qmp_stop(Error **errp)
  87 {
  88     vm_stop(RUN_STATE_PAUSED);
  89 }
  90
  91 void qmp_system_reset(Error **errp)
  92 {
  93     qemu_system_reset_request();
  94 }
  95
  96 void qmp_system_powerdown(Error **erp)
  97 {
  98     qemu_system_powerdown_request();
  99 }
 100
 101 void qmp_cpu(int64_t index, Error **errp)
 102 {
 103     /* Just do nothing */
 104 }
 105
 106 #ifndef CONFIG_VNC
 107 /* If VNC support is enabled, the "true" query-vnc command is
 108    defined in the VNC subsystem */
 109 VncInfo *qmp_query_vnc(Error **errp)
 110 {
 111     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 112     return NULL;
 113 };
 114 #endif
 115
 116 #ifndef CONFIG_SPICE
 117 /* If SPICE support is enabled, the "true" query-spice command is
 118    defined in the SPICE subsystem. Also note that we use a small
 119    trick to maintain query-spice's original behavior, which is not
 120    to be available in the namespace if SPICE is not compiled in */
 121 SpiceInfo *qmp_query_spice(Error **errp)
 122 {
 123     error_set(errp, QERR_COMMAND_NOT_FOUND, "query-spice");
 124     return NULL;
 125 };
 126 #endif
 127
 128 static void iostatus_bdrv_it(void *opaque, BlockDriverState *bs)
 129 {
 130     bdrv_iostatus_reset(bs);
 131 }
 132
 133 static void encrypted_bdrv_it(void *opaque, BlockDriverState *bs)
 134 {
 135     Error **err = opaque;
 136
 137     if (!error_is_set(err) && bdrv_key_required(bs)) {
 138         error_set(err, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
 139                   bdrv_get_encrypted_filename(bs));
 140     }
 141 }
 142
 143 void qmp_cont(Error **errp)
 144 {
 145     Error *local_err = NULL;
 146
 147     if (runstate_check(RUN_STATE_INMIGRATE)) {
 148         error_set(errp, QERR_MIGRATION_EXPECTED);
 149         return;
 150     } else if (runstate_check(RUN_STATE_INTERNAL_ERROR) ||
 151                runstate_check(RUN_STATE_SHUTDOWN)) {
 152         error_set(errp, QERR_RESET_REQUIRED);
 153         return;
 154     }
 155
 156     bdrv_iterate(iostatus_bdrv_it, NULL);
 157     bdrv_iterate(encrypted_bdrv_it, &local_err);
 158     if (local_err) {
 159         error_propagate(errp, local_err);
 160         return;
 161     }
 162
 163     vm_start();
 164 }
 165
 166 void qmp_system_wakeup(Error **errp)
 167 {
 168     qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
 169 }
 170
 171 ObjectPropertyInfoList *qmp_qom_list(const char *path, Error **errp)
 172 {
 173     Object *obj;
 174     bool ambiguous = false;
 175     ObjectPropertyInfoList *props = NULL;
 176     ObjectProperty *prop;
 177
 178     obj = object_resolve_path(path, &ambiguous);
 179     if (obj == NULL) {
 180         error_set(errp, QERR_DEVICE_NOT_FOUND, path);
 181         return NULL;
 182     }
 183
 184     QTAILQ_FOREACH(prop, &obj->properties, node) {
 185         ObjectPropertyInfoList *entry = g_malloc0(sizeof(*entry));
 186
 187         entry->value = g_malloc0(sizeof(ObjectPropertyInfo));
 188         entry->next = props;
 189         props = entry;
 190
 191         entry->value->name = g_strdup(prop->name);
 192         entry->value->type = g_strdup(prop->type);
 193     }
 194
 195     return props;
 196 }
 197
 198 /* FIXME: teach qapi about how to pass through Visitors */
 199 int qmp_qom_set(Monitor *mon, const QDict *qdict, QObject **ret)
 200 {
 201     const char *path = qdict_get_str(qdict, "path");
 202     const char *property = qdict_get_str(qdict, "property");
 203     QObject *value = qdict_get(qdict, "value");
 204     Error *local_err = NULL;
 205     Object *obj;
 206
 207     obj = object_resolve_path(path, NULL);
 208     if (!obj) {
 209         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 210         goto out;
 211     }
 212
 213     object_property_set_qobject(obj, value, property, &local_err);
 214
 215 out:
 216     if (local_err) {
 217         qerror_report_err(local_err);
 218         error_free(local_err);
 219         return -1;
 220     }
 221
 222     return 0;
 223 }
 224
 225 int qmp_qom_get(Monitor *mon, const QDict *qdict, QObject **ret)
 226 {
 227     const char *path = qdict_get_str(qdict, "path");
 228     const char *property = qdict_get_str(qdict, "property");
 229     Error *local_err = NULL;
 230     Object *obj;
 231
 232     obj = object_resolve_path(path, NULL);
 233     if (!obj) {
 234         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 235         goto out;
 236     }
 237
 238     *ret = object_property_get_qobject(obj, property, &local_err);
 239
 240 out:
 241     if (local_err) {
 242         qerror_report_err(local_err);
 243         error_free(local_err);
 244         return -1;
 245     }
 246
 247     return 0;
 248 }
 249
 250 void qmp_set_password(const char *protocol, const char *password,
 251                       bool has_connected, const char *connected, Error **errp)
 252 {
 253     int disconnect_if_connected = 0;
 254     int fail_if_connected = 0;
 255     int rc;
 256
 257     if (has_connected) {
 258         if (strcmp(connected, "fail") == 0) {
 259             fail_if_connected = 1;
 260         } else if (strcmp(connected, "disconnect") == 0) {
 261             disconnect_if_connected = 1;
 262         } else if (strcmp(connected, "keep") == 0) {
 263             /* nothing */
 264         } else {
 265             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 266             return;
 267         }
 268     }
 269
 270     if (strcmp(protocol, "spice") == 0) {
 271         if (!using_spice) {
 272             /* correct one? spice isn't a device ,,, */
 273             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 274             return;
 275         }
 276         rc = qemu_spice_set_passwd(password, fail_if_connected,
 277                                    disconnect_if_connected);
 278         if (rc != 0) {
 279             error_set(errp, QERR_SET_PASSWD_FAILED);
 280         }
 281         return;
 282     }
 283
 284     if (strcmp(protocol, "vnc") == 0) {
 285         if (fail_if_connected || disconnect_if_connected) {
 286             /* vnc supports "connected=keep" only */
 287             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 288             return;
 289         }
 290         /* Note that setting an empty password will not disable login through
 291          * this interface. */
 292         rc = vnc_display_password(NULL, password);
 293         if (rc < 0) {
 294             error_set(errp, QERR_SET_PASSWD_FAILED);
 295         }
 296         return;
 297     }
 298
 299     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 300 }
 301
 302 void qmp_expire_password(const char *protocol, const char *whenstr,
 303                          Error **errp)
 304 {
 305     time_t when;
 306     int rc;
 307
 308     if (strcmp(whenstr, "now") == 0) {
 309         when = 0;
 310     } else if (strcmp(whenstr, "never") == 0) {
 311         when = TIME_MAX;
 312     } else if (whenstr[0] == '+') {
 313         when = time(NULL) + strtoull(whenstr+1, NULL, 10);
 314     } else {
 315         when = strtoull(whenstr, NULL, 10);
 316     }
 317
 318     if (strcmp(protocol, "spice") == 0) {
 319         if (!using_spice) {
 320             /* correct one? spice isn't a device ,,, */
 321             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 322             return;
 323         }
 324         rc = qemu_spice_set_pw_expire(when);
 325         if (rc != 0) {
 326             error_set(errp, QERR_SET_PASSWD_FAILED);
 327         }
 328         return;
 329     }
 330
 331     if (strcmp(protocol, "vnc") == 0) {
 332         rc = vnc_display_pw_expire(NULL, when);
 333         if (rc != 0) {
 334             error_set(errp, QERR_SET_PASSWD_FAILED);
 335         }
 336         return;
 337     }
 338
 339     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 340 }
 341
 342 #ifdef CONFIG_VNC
 343 void qmp_change_vnc_password(const char *password, Error **errp)
 344 {
 345     if (vnc_display_password(NULL, password) < 0) {
 346         error_set(errp, QERR_SET_PASSWD_FAILED);
 347     }
 348 }
 349
 350 static void qmp_change_vnc_listen(const char *target, Error **err)
 351 {
 352     if (vnc_display_open(NULL, target) < 0) {
 353         error_set(err, QERR_VNC_SERVER_FAILED, target);
 354     }
 355 }
 356
 357 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 358                            Error **errp)
 359 {
 360     if (strcmp(target, "passwd") == 0 || strcmp(target, "password") == 0) {
 361         if (!has_arg) {
 362             error_set(errp, QERR_MISSING_PARAMETER, "password");
 363         } else {
 364             qmp_change_vnc_password(arg, errp);
 365         }
 366     } else {
 367         qmp_change_vnc_listen(target, errp);
 368     }
 369 }
 370 #else
 371 void qmp_change_vnc_password(const char *password, Error **errp)
 372 {
 373     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 374 }
 375 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 376                            Error **errp)
 377 {
 378     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 379 }
 380 #endif /* !CONFIG_VNC */
 381
 382 void qmp_change(const char *device, const char *target,
 383                 bool has_arg, const char *arg, Error **err)
 384 {
 385     if (strcmp(device, "vnc") == 0) {
 386         qmp_change_vnc(target, has_arg, arg, err);
 387     } else {
 388         qmp_change_blockdev(device, target, has_arg, arg, err);
 389     }
 390 }
 391
 392 static void qom_list_types_tramp(ObjectClass *klass, void *data)
 393 {
 394     ObjectTypeInfoList *e, **pret = data;
 395     ObjectTypeInfo *info;
 396
 397     info = g_malloc0(sizeof(*info));
 398     info->name = g_strdup(object_class_get_name(klass));
 399
 400     e = g_malloc0(sizeof(*e));
 401     e->value = info;
 402     e->next = *pret;
 403     *pret = e;
 404 }
 405
 406 ObjectTypeInfoList *qmp_qom_list_types(bool has_implements,
 407                                        const char *implements,
 408                                        bool has_abstract,
 409                                        bool abstract,
 410                                        Error **errp)
 411 {
 412     ObjectTypeInfoList *ret = NULL;
 413
 414     object_class_foreach(qom_list_types_tramp, implements, abstract, &ret);
 415
 416     return ret;
 417 }