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 ObjectPropertyInfoList *qmp_qom_list(const char *path, Error **errp)
 167 {
 168     Object *obj;
 169     bool ambiguous = false;
 170     ObjectPropertyInfoList *props = NULL;
 171     ObjectProperty *prop;
 172
 173     obj = object_resolve_path(path, &ambiguous);
 174     if (obj == NULL) {
 175         error_set(errp, QERR_DEVICE_NOT_FOUND, path);
 176         return NULL;
 177     }
 178
 179     QTAILQ_FOREACH(prop, &obj->properties, node) {
 180         ObjectPropertyInfoList *entry = g_malloc0(sizeof(*entry));
 181
 182         entry->value = g_malloc0(sizeof(ObjectPropertyInfo));
 183         entry->next = props;
 184         props = entry;
 185
 186         entry->value->name = g_strdup(prop->name);
 187         entry->value->type = g_strdup(prop->type);
 188     }
 189
 190     return props;
 191 }
 192
 193 /* FIXME: teach qapi about how to pass through Visitors */
 194 int qmp_qom_set(Monitor *mon, const QDict *qdict, QObject **ret)
 195 {
 196     const char *path = qdict_get_str(qdict, "path");
 197     const char *property = qdict_get_str(qdict, "property");
 198     QObject *value = qdict_get(qdict, "value");
 199     Error *local_err = NULL;
 200     Object *obj;
 201
 202     obj = object_resolve_path(path, NULL);
 203     if (!obj) {
 204         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 205         goto out;
 206     }
 207
 208     object_property_set_qobject(obj, value, property, &local_err);
 209
 210 out:
 211     if (local_err) {
 212         qerror_report_err(local_err);
 213         error_free(local_err);
 214         return -1;
 215     }
 216
 217     return 0;
 218 }
 219
 220 int qmp_qom_get(Monitor *mon, const QDict *qdict, QObject **ret)
 221 {
 222     const char *path = qdict_get_str(qdict, "path");
 223     const char *property = qdict_get_str(qdict, "property");
 224     Error *local_err = NULL;
 225     Object *obj;
 226
 227     obj = object_resolve_path(path, NULL);
 228     if (!obj) {
 229         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 230         goto out;
 231     }
 232
 233     *ret = object_property_get_qobject(obj, property, &local_err);
 234
 235 out:
 236     if (local_err) {
 237         qerror_report_err(local_err);
 238         error_free(local_err);
 239         return -1;
 240     }
 241
 242     return 0;
 243 }
 244
 245 void qmp_set_password(const char *protocol, const char *password,
 246                       bool has_connected, const char *connected, Error **errp)
 247 {
 248     int disconnect_if_connected = 0;
 249     int fail_if_connected = 0;
 250     int rc;
 251
 252     if (has_connected) {
 253         if (strcmp(connected, "fail") == 0) {
 254             fail_if_connected = 1;
 255         } else if (strcmp(connected, "disconnect") == 0) {
 256             disconnect_if_connected = 1;
 257         } else if (strcmp(connected, "keep") == 0) {
 258             /* nothing */
 259         } else {
 260             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 261             return;
 262         }
 263     }
 264
 265     if (strcmp(protocol, "spice") == 0) {
 266         if (!using_spice) {
 267             /* correct one? spice isn't a device ,,, */
 268             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 269             return;
 270         }
 271         rc = qemu_spice_set_passwd(password, fail_if_connected,
 272                                    disconnect_if_connected);
 273         if (rc != 0) {
 274             error_set(errp, QERR_SET_PASSWD_FAILED);
 275         }
 276         return;
 277     }
 278
 279     if (strcmp(protocol, "vnc") == 0) {
 280         if (fail_if_connected || disconnect_if_connected) {
 281             /* vnc supports "connected=keep" only */
 282             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 283             return;
 284         }
 285         /* Note that setting an empty password will not disable login through
 286          * this interface. */
 287         rc = vnc_display_password(NULL, password);
 288         if (rc < 0) {
 289             error_set(errp, QERR_SET_PASSWD_FAILED);
 290         }
 291         return;
 292     }
 293
 294     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 295 }
 296
 297 void qmp_expire_password(const char *protocol, const char *whenstr,
 298                          Error **errp)
 299 {
 300     time_t when;
 301     int rc;
 302
 303     if (strcmp(whenstr, "now") == 0) {
 304         when = 0;
 305     } else if (strcmp(whenstr, "never") == 0) {
 306         when = TIME_MAX;
 307     } else if (whenstr[0] == '+') {
 308         when = time(NULL) + strtoull(whenstr+1, NULL, 10);
 309     } else {
 310         when = strtoull(whenstr, NULL, 10);
 311     }
 312
 313     if (strcmp(protocol, "spice") == 0) {
 314         if (!using_spice) {
 315             /* correct one? spice isn't a device ,,, */
 316             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 317             return;
 318         }
 319         rc = qemu_spice_set_pw_expire(when);
 320         if (rc != 0) {
 321             error_set(errp, QERR_SET_PASSWD_FAILED);
 322         }
 323         return;
 324     }
 325
 326     if (strcmp(protocol, "vnc") == 0) {
 327         rc = vnc_display_pw_expire(NULL, when);
 328         if (rc != 0) {
 329             error_set(errp, QERR_SET_PASSWD_FAILED);
 330         }
 331         return;
 332     }
 333
 334     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 335 }
 336
 337 #ifdef CONFIG_VNC
 338 void qmp_change_vnc_password(const char *password, Error **errp)
 339 {
 340     if (vnc_display_password(NULL, password) < 0) {
 341         error_set(errp, QERR_SET_PASSWD_FAILED);
 342     }
 343 }
 344
 345 static void qmp_change_vnc_listen(const char *target, Error **err)
 346 {
 347     if (vnc_display_open(NULL, target) < 0) {
 348         error_set(err, QERR_VNC_SERVER_FAILED, target);
 349     }
 350 }
 351
 352 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 353                            Error **errp)
 354 {
 355     if (strcmp(target, "passwd") == 0 || strcmp(target, "password") == 0) {
 356         if (!has_arg) {
 357             error_set(errp, QERR_MISSING_PARAMETER, "password");
 358         } else {
 359             qmp_change_vnc_password(arg, errp);
 360         }
 361     } else {
 362         qmp_change_vnc_listen(target, errp);
 363     }
 364 }
 365 #else
 366 void qmp_change_vnc_password(const char *password, Error **errp)
 367 {
 368     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 369 }
 370 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 371                            Error **errp)
 372 {
 373     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 374 }
 375 #endif /* !CONFIG_VNC */
 376
 377 void qmp_change(const char *device, const char *target,
 378                 bool has_arg, const char *arg, Error **err)
 379 {
 380     if (strcmp(device, "vnc") == 0) {
 381         qmp_change_vnc(target, has_arg, arg, err);
 382     } else {
 383         qmp_change_blockdev(device, target, has_arg, arg, err);
 384     }
 385 }
 386
 387 static void qom_list_types_tramp(ObjectClass *klass, void *data)
 388 {
 389     ObjectTypeInfoList *e, **pret = data;
 390     ObjectTypeInfo *info;
 391
 392     info = g_malloc0(sizeof(*info));
 393     info->name = g_strdup(object_class_get_name(klass));
 394
 395     e = g_malloc0(sizeof(*e));
 396     e->value = info;
 397     e->next = *pret;
 398     *pret = e;
 399 }
 400
 401 ObjectTypeInfoList *qmp_qom_list_types(bool has_implements,
 402                                        const char *implements,
 403                                        bool has_abstract,
 404                                        bool abstract,
 405                                        Error **errp)
 406 {
 407     ObjectTypeInfoList *ret = NULL;
 408
 409     object_class_foreach(qom_list_types_tramp, implements, abstract, &ret);
 410
 411     return ret;
 412 }