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 "qapi/qmp-input-visitor.h"
  25 #include "qapi/qmp-output-visitor.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 DevicePropertyInfoList *qmp_qom_list(const char *path, Error **errp)
 167 {
 168     DeviceState *dev;
 169     bool ambiguous = false;
 170     DevicePropertyInfoList *props = NULL;
 171     DeviceProperty *prop;
 172
 173     dev = qdev_resolve_path(path, &ambiguous);
 174     if (dev == NULL) {
 175         error_set(errp, QERR_DEVICE_NOT_FOUND, path);
 176         return NULL;
 177     }
 178
 179     QTAILQ_FOREACH(prop, &dev->properties, node) {
 180         DevicePropertyInfoList *entry = g_malloc0(sizeof(*entry));
 181
 182         entry->value = g_malloc0(sizeof(DevicePropertyInfo));
 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     QmpInputVisitor *mi;
 201     DeviceState *dev;
 202
 203     dev = qdev_resolve_path(path, NULL);
 204     if (!dev) {
 205         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 206         goto out;
 207     }
 208
 209     mi = qmp_input_visitor_new(value);
 210     qdev_property_set(dev, qmp_input_get_visitor(mi), property, &local_err);
 211
 212     qmp_input_visitor_cleanup(mi);
 213
 214 out:
 215     if (local_err) {
 216         qerror_report_err(local_err);
 217         error_free(local_err);
 218         return -1;
 219     }
 220
 221     return 0;
 222 }
 223
 224 int qmp_qom_get(Monitor *mon, const QDict *qdict, QObject **ret)
 225 {
 226     const char *path = qdict_get_str(qdict, "path");
 227     const char *property = qdict_get_str(qdict, "property");
 228     Error *local_err = NULL;
 229     QmpOutputVisitor *mo;
 230     DeviceState *dev;
 231
 232     dev = qdev_resolve_path(path, NULL);
 233     if (!dev) {
 234         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 235         goto out;
 236     }
 237
 238     mo = qmp_output_visitor_new();
 239     qdev_property_get(dev, qmp_output_get_visitor(mo), property, &local_err);
 240     if (!local_err) {
 241         *ret = qmp_output_get_qobject(mo);
 242     }
 243
 244     qmp_output_visitor_cleanup(mo);
 245
 246 out:
 247     if (local_err) {
 248         qerror_report_err(local_err);
 249         error_free(local_err);
 250         return -1;
 251     }
 252
 253     return 0;
 254 }
 255
 256 void qmp_set_password(const char *protocol, const char *password,
 257                       bool has_connected, const char *connected, Error **errp)
 258 {
 259     int disconnect_if_connected = 0;
 260     int fail_if_connected = 0;
 261     int rc;
 262
 263     if (has_connected) {
 264         if (strcmp(connected, "fail") == 0) {
 265             fail_if_connected = 1;
 266         } else if (strcmp(connected, "disconnect") == 0) {
 267             disconnect_if_connected = 1;
 268         } else if (strcmp(connected, "keep") == 0) {
 269             /* nothing */
 270         } else {
 271             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 272             return;
 273         }
 274     }
 275
 276     if (strcmp(protocol, "spice") == 0) {
 277         if (!using_spice) {
 278             /* correct one? spice isn't a device ,,, */
 279             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 280             return;
 281         }
 282         rc = qemu_spice_set_passwd(password, fail_if_connected,
 283                                    disconnect_if_connected);
 284         if (rc != 0) {
 285             error_set(errp, QERR_SET_PASSWD_FAILED);
 286         }
 287         return;
 288     }
 289
 290     if (strcmp(protocol, "vnc") == 0) {
 291         if (fail_if_connected || disconnect_if_connected) {
 292             /* vnc supports "connected=keep" only */
 293             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 294             return;
 295         }
 296         /* Note that setting an empty password will not disable login through
 297          * this interface. */
 298         rc = vnc_display_password(NULL, password);
 299         if (rc < 0) {
 300             error_set(errp, QERR_SET_PASSWD_FAILED);
 301         }
 302         return;
 303     }
 304
 305     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 306 }
 307
 308 void qmp_expire_password(const char *protocol, const char *whenstr,
 309                          Error **errp)
 310 {
 311     time_t when;
 312     int rc;
 313
 314     if (strcmp(whenstr, "now") == 0) {
 315         when = 0;
 316     } else if (strcmp(whenstr, "never") == 0) {
 317         when = TIME_MAX;
 318     } else if (whenstr[0] == '+') {
 319         when = time(NULL) + strtoull(whenstr+1, NULL, 10);
 320     } else {
 321         when = strtoull(whenstr, NULL, 10);
 322     }
 323
 324     if (strcmp(protocol, "spice") == 0) {
 325         if (!using_spice) {
 326             /* correct one? spice isn't a device ,,, */
 327             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 328             return;
 329         }
 330         rc = qemu_spice_set_pw_expire(when);
 331         if (rc != 0) {
 332             error_set(errp, QERR_SET_PASSWD_FAILED);
 333         }
 334         return;
 335     }
 336
 337     if (strcmp(protocol, "vnc") == 0) {
 338         rc = vnc_display_pw_expire(NULL, when);
 339         if (rc != 0) {
 340             error_set(errp, QERR_SET_PASSWD_FAILED);
 341         }
 342         return;
 343     }
 344
 345     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 346 }
 347
 348 void qmp_change_vnc_password(const char *password, Error **errp)
 349 {
 350     if (vnc_display_password(NULL, password) < 0) {
 351         error_set(errp, QERR_SET_PASSWD_FAILED);
 352     }
 353 }