block/monitor/block-hmp-cmds.c

   1 /*
   2  * Blockdev HMP commands
   3  *
   4  *  Authors:
   5  *  Anthony Liguori   <aliguori@us.ibm.com>
   6  *
   7  * Copyright (c) 2003-2008 Fabrice Bellard
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2.
  10  * See the COPYING file in the top-level directory.
  11  * Contributions after 2012-01-13 are licensed under the terms of the
  12  * GNU GPL, version 2 or (at your option) any later version.
  13  *
  14  * This file incorporates work covered by the following copyright and
  15  * permission notice:
  16  *
  17  * Copyright (c) 2003-2008 Fabrice Bellard
  18  *
  19  * Permission is hereby granted, free of charge, to any person obtaining a copy
  20  * of this software and associated documentation files (the "Software"), to deal
  21  * in the Software without restriction, including without limitation the rights
  22  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  23  * copies of the Software, and to permit persons to whom the Software is
  24  * furnished to do so, subject to the following conditions:
  25  *
  26  * The above copyright notice and this permission notice shall be included in
  27  * all copies or substantial portions of the Software.
  28  *
  29  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  30  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  31  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  32  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  33  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  34  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  35  * THE SOFTWARE.
  36  */
  37
  38 #include "qemu/osdep.h"
  39 #include "hw/boards.h"
  40 #include "sysemu/block-backend.h"
  41 #include "sysemu/blockdev.h"
  42 #include "qapi/qapi-commands-block.h"
  43 #include "qapi/qapi-commands-block-export.h"
  44 #include "qapi/qmp/qdict.h"
  45 #include "qapi/error.h"
  46 #include "qapi/qmp/qerror.h"
  47 #include "qemu/config-file.h"
  48 #include "qemu/option.h"
  49 #include "qemu/sockets.h"
  50 #include "qemu/cutils.h"
  51 #include "qemu/error-report.h"
  52 #include "sysemu/sysemu.h"
  53 #include "monitor/monitor.h"
  54 #include "monitor/hmp.h"
  55 #include "block/nbd.h"
  56 #include "block/qapi.h"
  57 #include "block/block_int.h"
  58 #include "block/block-hmp-cmds.h"
  59 #include "qemu-io.h"
  60
  61 static void hmp_drive_add_node(Monitor *mon, const char *optstr)
  62 {
  63     QemuOpts *opts;
  64     QDict *qdict;
  65     Error *local_err = NULL;
  66
  67     opts = qemu_opts_parse_noisily(&qemu_drive_opts, optstr, false);
  68     if (!opts) {
  69         return;
  70     }
  71
  72     qdict = qemu_opts_to_qdict(opts, NULL);
  73
  74     if (!qdict_get_try_str(qdict, "node-name")) {
  75         qobject_unref(qdict);
  76         error_report("'node-name' needs to be specified");
  77         goto out;
  78     }
  79
  80     BlockDriverState *bs = bds_tree_init(qdict, &local_err);
  81     if (!bs) {
  82         error_report_err(local_err);
  83         goto out;
  84     }
  85
  86     bdrv_set_monitor_owned(bs);
  87 out:
  88     qemu_opts_del(opts);
  89 }
  90
  91 void hmp_drive_add(Monitor *mon, const QDict *qdict)
  92 {
  93     Error *err = NULL;
  94     DriveInfo *dinfo;
  95     QemuOpts *opts;
  96     MachineClass *mc;
  97     const char *optstr = qdict_get_str(qdict, "opts");
  98     bool node = qdict_get_try_bool(qdict, "node", false);
  99
 100     if (node) {
 101         hmp_drive_add_node(mon, optstr);
 102         return;
 103     }
 104
 105     opts = qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false);
 106     if (!opts)
 107         return;
 108
 109     mc = MACHINE_GET_CLASS(current_machine);
 110     dinfo = drive_new(opts, mc->block_default_type, &err);
 111     if (err) {
 112         error_report_err(err);
 113         qemu_opts_del(opts);
 114         goto err;
 115     }
 116
 117     if (!dinfo) {
 118         return;
 119     }
 120
 121     switch (dinfo->type) {
 122     case IF_NONE:
 123         monitor_printf(mon, "OK\n");
 124         break;
 125     default:
 126         monitor_printf(mon, "Can't hot-add drive to type %d\n", dinfo->type);
 127         goto err;
 128     }
 129     return;
 130
 131 err:
 132     if (dinfo) {
 133         BlockBackend *blk = blk_by_legacy_dinfo(dinfo);
 134         monitor_remove_blk(blk);
 135         blk_unref(blk);
 136     }
 137 }
 138
 139 void hmp_drive_del(Monitor *mon, const QDict *qdict)
 140 {
 141     const char *id = qdict_get_str(qdict, "id");
 142     BlockBackend *blk;
 143     BlockDriverState *bs;
 144     Error *local_err = NULL;
 145
 146     GLOBAL_STATE_CODE();
 147     GRAPH_RDLOCK_GUARD_MAINLOOP();
 148
 149     bs = bdrv_find_node(id);
 150     if (bs) {
 151         qmp_blockdev_del(id, &local_err);
 152         if (local_err) {
 153             error_report_err(local_err);
 154         }
 155         return;
 156     }
 157
 158     blk = blk_by_name(id);
 159     if (!blk) {
 160         error_report("Device '%s' not found", id);
 161         return;
 162     }
 163
 164     if (!blk_legacy_dinfo(blk)) {
 165         error_report("Deleting device added with blockdev-add"
 166                      " is not supported");
 167         return;
 168     }
 169
 170     bs = blk_bs(blk);
 171     if (bs) {
 172         if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
 173             error_report_err(local_err);
 174             return;
 175         }
 176
 177         blk_remove_bs(blk);
 178     }
 179
 180     /* Make the BlockBackend and the attached BlockDriverState anonymous */
 181     monitor_remove_blk(blk);
 182
 183     /*
 184      * If this BlockBackend has a device attached to it, its refcount will be
 185      * decremented when the device is removed; otherwise we have to do so here.
 186      */
 187     if (blk_get_attached_dev(blk)) {
 188         /* Further I/O must not pause the guest */
 189         blk_set_on_error(blk, BLOCKDEV_ON_ERROR_REPORT,
 190                          BLOCKDEV_ON_ERROR_REPORT);
 191     } else {
 192         blk_unref(blk);
 193     }
 194 }
 195
 196 void hmp_commit(Monitor *mon, const QDict *qdict)
 197 {
 198     const char *device = qdict_get_str(qdict, "device");
 199     BlockBackend *blk;
 200     int ret;
 201
 202     GLOBAL_STATE_CODE();
 203     GRAPH_RDLOCK_GUARD_MAINLOOP();
 204
 205     if (!strcmp(device, "all")) {
 206         ret = blk_commit_all();
 207     } else {
 208         BlockDriverState *bs;
 209
 210         blk = blk_by_name(device);
 211         if (!blk) {
 212             error_report("Device '%s' not found", device);
 213             return;
 214         }
 215
 216         bs = bdrv_skip_implicit_filters(blk_bs(blk));
 217
 218         if (!blk_is_available(blk)) {
 219             error_report("Device '%s' has no medium", device);
 220             return;
 221         }
 222
 223         ret = bdrv_commit(bs);
 224     }
 225     if (ret < 0) {
 226         error_report("'commit' error for '%s': %s", device, strerror(-ret));
 227     }
 228 }
 229
 230 void hmp_drive_mirror(Monitor *mon, const QDict *qdict)
 231 {
 232     const char *filename = qdict_get_str(qdict, "target");
 233     const char *format = qdict_get_try_str(qdict, "format");
 234     bool reuse = qdict_get_try_bool(qdict, "reuse", false);
 235     bool full = qdict_get_try_bool(qdict, "full", false);
 236     Error *err = NULL;
 237     DriveMirror mirror = {
 238         .device = (char *)qdict_get_str(qdict, "device"),
 239         .target = (char *)filename,
 240         .format = (char *)format,
 241         .sync = full ? MIRROR_SYNC_MODE_FULL : MIRROR_SYNC_MODE_TOP,
 242         .has_mode = true,
 243         .mode = reuse ? NEW_IMAGE_MODE_EXISTING : NEW_IMAGE_MODE_ABSOLUTE_PATHS,
 244         .unmap = true,
 245     };
 246
 247     if (!filename) {
 248         error_setg(&err, QERR_MISSING_PARAMETER, "target");
 249         goto end;
 250     }
 251     qmp_drive_mirror(&mirror, &err);
 252 end:
 253     hmp_handle_error(mon, err);
 254 }
 255
 256 void hmp_drive_backup(Monitor *mon, const QDict *qdict)
 257 {
 258     const char *device = qdict_get_str(qdict, "device");
 259     const char *filename = qdict_get_str(qdict, "target");
 260     const char *format = qdict_get_try_str(qdict, "format");
 261     bool reuse = qdict_get_try_bool(qdict, "reuse", false);
 262     bool full = qdict_get_try_bool(qdict, "full", false);
 263     bool compress = qdict_get_try_bool(qdict, "compress", false);
 264     Error *err = NULL;
 265     DriveBackup backup = {
 266         .device = (char *)device,
 267         .target = (char *)filename,
 268         .format = (char *)format,
 269         .sync = full ? MIRROR_SYNC_MODE_FULL : MIRROR_SYNC_MODE_TOP,
 270         .has_mode = true,
 271         .mode = reuse ? NEW_IMAGE_MODE_EXISTING : NEW_IMAGE_MODE_ABSOLUTE_PATHS,
 272         .has_compress = !!compress,
 273         .compress = compress,
 274     };
 275
 276     if (!filename) {
 277         error_setg(&err, QERR_MISSING_PARAMETER, "target");
 278         goto end;
 279     }
 280
 281     qmp_drive_backup(&backup, &err);
 282 end:
 283     hmp_handle_error(mon, err);
 284 }
 285
 286 void hmp_block_job_set_speed(Monitor *mon, const QDict *qdict)
 287 {
 288     Error *error = NULL;
 289     const char *device = qdict_get_str(qdict, "device");
 290     int64_t value = qdict_get_int(qdict, "speed");
 291
 292     qmp_block_job_set_speed(device, value, &error);
 293
 294     hmp_handle_error(mon, error);
 295 }
 296
 297 void hmp_block_job_cancel(Monitor *mon, const QDict *qdict)
 298 {
 299     Error *error = NULL;
 300     const char *device = qdict_get_str(qdict, "device");
 301     bool force = qdict_get_try_bool(qdict, "force", false);
 302
 303     qmp_block_job_cancel(device, true, force, &error);
 304
 305     hmp_handle_error(mon, error);
 306 }
 307
 308 void hmp_block_job_pause(Monitor *mon, const QDict *qdict)
 309 {
 310     Error *error = NULL;
 311     const char *device = qdict_get_str(qdict, "device");
 312
 313     qmp_block_job_pause(device, &error);
 314
 315     hmp_handle_error(mon, error);
 316 }
 317
 318 void hmp_block_job_resume(Monitor *mon, const QDict *qdict)
 319 {
 320     Error *error = NULL;
 321     const char *device = qdict_get_str(qdict, "device");
 322
 323     qmp_block_job_resume(device, &error);
 324
 325     hmp_handle_error(mon, error);
 326 }
 327
 328 void hmp_block_job_complete(Monitor *mon, const QDict *qdict)
 329 {
 330     Error *error = NULL;
 331     const char *device = qdict_get_str(qdict, "device");
 332
 333     qmp_block_job_complete(device, &error);
 334
 335     hmp_handle_error(mon, error);
 336 }
 337
 338 void hmp_snapshot_blkdev(Monitor *mon, const QDict *qdict)
 339 {
 340     const char *device = qdict_get_str(qdict, "device");
 341     const char *filename = qdict_get_try_str(qdict, "snapshot-file");
 342     const char *format = qdict_get_try_str(qdict, "format");
 343     bool reuse = qdict_get_try_bool(qdict, "reuse", false);
 344     enum NewImageMode mode;
 345     Error *err = NULL;
 346
 347     if (!filename) {
 348         /*
 349          * In the future, if 'snapshot-file' is not specified, the snapshot
 350          * will be taken internally. Today it's actually required.
 351          */
 352         error_setg(&err, QERR_MISSING_PARAMETER, "snapshot-file");
 353         goto end;
 354     }
 355
 356     mode = reuse ? NEW_IMAGE_MODE_EXISTING : NEW_IMAGE_MODE_ABSOLUTE_PATHS;
 357     qmp_blockdev_snapshot_sync(device, NULL, filename, NULL, format,
 358                                true, mode, &err);
 359 end:
 360     hmp_handle_error(mon, err);
 361 }
 362
 363 void hmp_snapshot_blkdev_internal(Monitor *mon, const QDict *qdict)
 364 {
 365     const char *device = qdict_get_str(qdict, "device");
 366     const char *name = qdict_get_str(qdict, "name");
 367     Error *err = NULL;
 368
 369     qmp_blockdev_snapshot_internal_sync(device, name, &err);
 370     hmp_handle_error(mon, err);
 371 }
 372
 373 void hmp_snapshot_delete_blkdev_internal(Monitor *mon, const QDict *qdict)
 374 {
 375     const char *device = qdict_get_str(qdict, "device");
 376     const char *name = qdict_get_str(qdict, "name");
 377     const char *id = qdict_get_try_str(qdict, "id");
 378     Error *err = NULL;
 379
 380     qmp_blockdev_snapshot_delete_internal_sync(device, id, name, &err);
 381     hmp_handle_error(mon, err);
 382 }
 383
 384 void hmp_nbd_server_start(Monitor *mon, const QDict *qdict)
 385 {
 386     const char *uri = qdict_get_str(qdict, "uri");
 387     bool writable = qdict_get_try_bool(qdict, "writable", false);
 388     bool all = qdict_get_try_bool(qdict, "all", false);
 389     Error *local_err = NULL;
 390     BlockInfoList *block_list, *info;
 391     SocketAddress *addr;
 392     NbdServerAddOptions export;
 393
 394     if (writable && !all) {
 395         error_setg(&local_err, "-w only valid together with -a");
 396         goto exit;
 397     }
 398
 399     /* First check if the address is valid and start the server.  */
 400     addr = socket_parse(uri, &local_err);
 401     if (local_err != NULL) {
 402         goto exit;
 403     }
 404
 405     nbd_server_start(addr, NULL, NULL, 0, &local_err);
 406     qapi_free_SocketAddress(addr);
 407     if (local_err != NULL) {
 408         goto exit;
 409     }
 410
 411     if (!all) {
 412         return;
 413     }
 414
 415     /* Then try adding all block devices.  If one fails, close all and
 416      * exit.
 417      */
 418     block_list = qmp_query_block(NULL);
 419
 420     for (info = block_list; info; info = info->next) {
 421         if (!info->value->inserted) {
 422             continue;
 423         }
 424
 425         export = (NbdServerAddOptions) {
 426             .device         = info->value->device,
 427             .has_writable   = true,
 428             .writable       = writable,
 429         };
 430
 431         qmp_nbd_server_add(&export, &local_err);
 432
 433         if (local_err != NULL) {
 434             qmp_nbd_server_stop(NULL);
 435             break;
 436         }
 437     }
 438
 439     qapi_free_BlockInfoList(block_list);
 440
 441 exit:
 442     hmp_handle_error(mon, local_err);
 443 }
 444
 445 void hmp_nbd_server_add(Monitor *mon, const QDict *qdict)
 446 {
 447     const char *device = qdict_get_str(qdict, "device");
 448     const char *name = qdict_get_try_str(qdict, "name");
 449     bool writable = qdict_get_try_bool(qdict, "writable", false);
 450     Error *local_err = NULL;
 451
 452     NbdServerAddOptions export = {
 453         .device         = (char *) device,
 454         .name           = (char *) name,
 455         .has_writable   = true,
 456         .writable       = writable,
 457     };
 458
 459     qmp_nbd_server_add(&export, &local_err);
 460     hmp_handle_error(mon, local_err);
 461 }
 462
 463 void hmp_nbd_server_remove(Monitor *mon, const QDict *qdict)
 464 {
 465     const char *name = qdict_get_str(qdict, "name");
 466     bool force = qdict_get_try_bool(qdict, "force", false);
 467     Error *err = NULL;
 468
 469     /* Rely on BLOCK_EXPORT_REMOVE_MODE_SAFE being the default */
 470     qmp_nbd_server_remove(name, force, BLOCK_EXPORT_REMOVE_MODE_HARD, &err);
 471     hmp_handle_error(mon, err);
 472 }
 473
 474 void hmp_nbd_server_stop(Monitor *mon, const QDict *qdict)
 475 {
 476     Error *err = NULL;
 477
 478     qmp_nbd_server_stop(&err);
 479     hmp_handle_error(mon, err);
 480 }
 481
 482 void coroutine_fn hmp_block_resize(Monitor *mon, const QDict *qdict)
 483 {
 484     const char *device = qdict_get_str(qdict, "device");
 485     int64_t size = qdict_get_int(qdict, "size");
 486     Error *err = NULL;
 487
 488     qmp_block_resize(device, NULL, size, &err);
 489     hmp_handle_error(mon, err);
 490 }
 491
 492 void hmp_block_stream(Monitor *mon, const QDict *qdict)
 493 {
 494     Error *error = NULL;
 495     const char *device = qdict_get_str(qdict, "device");
 496     const char *base = qdict_get_try_str(qdict, "base");
 497     int64_t speed = qdict_get_try_int(qdict, "speed", 0);
 498
 499     qmp_block_stream(device, device, base, NULL, NULL, false, false, NULL,
 500                      qdict_haskey(qdict, "speed"), speed,
 501                      true, BLOCKDEV_ON_ERROR_REPORT, NULL,
 502                      false, false, false, false, &error);
 503
 504     hmp_handle_error(mon, error);
 505 }
 506
 507 void hmp_block_set_io_throttle(Monitor *mon, const QDict *qdict)
 508 {
 509     Error *err = NULL;
 510     char *device = (char *) qdict_get_str(qdict, "device");
 511     BlockIOThrottle throttle = {
 512         .bps = qdict_get_int(qdict, "bps"),
 513         .bps_rd = qdict_get_int(qdict, "bps_rd"),
 514         .bps_wr = qdict_get_int(qdict, "bps_wr"),
 515         .iops = qdict_get_int(qdict, "iops"),
 516         .iops_rd = qdict_get_int(qdict, "iops_rd"),
 517         .iops_wr = qdict_get_int(qdict, "iops_wr"),
 518     };
 519
 520     /*
 521      * qmp_block_set_io_throttle has separate parameters for the
 522      * (deprecated) block device name and the qdev ID but the HMP
 523      * version has only one, so we must decide which one to pass.
 524      */
 525     if (blk_by_name(device)) {
 526         throttle.device = device;
 527     } else {
 528         throttle.id = device;
 529     }
 530
 531     qmp_block_set_io_throttle(&throttle, &err);
 532     hmp_handle_error(mon, err);
 533 }
 534
 535 void hmp_eject(Monitor *mon, const QDict *qdict)
 536 {
 537     bool force = qdict_get_try_bool(qdict, "force", false);
 538     const char *device = qdict_get_str(qdict, "device");
 539     Error *err = NULL;
 540
 541     qmp_eject(device, NULL, true, force, &err);
 542     hmp_handle_error(mon, err);
 543 }
 544
 545 void hmp_qemu_io(Monitor *mon, const QDict *qdict)
 546 {
 547     BlockBackend *blk = NULL;
 548     BlockDriverState *bs = NULL;
 549     BlockBackend *local_blk = NULL;
 550     bool qdev = qdict_get_try_bool(qdict, "qdev", false);
 551     const char *device = qdict_get_str(qdict, "device");
 552     const char *command = qdict_get_str(qdict, "command");
 553     Error *err = NULL;
 554     int ret;
 555
 556     if (qdev) {
 557         blk = blk_by_qdev_id(device, &err);
 558         if (!blk) {
 559             goto fail;
 560         }
 561     } else {
 562         blk = blk_by_name(device);
 563         if (!blk) {
 564             bs = bdrv_lookup_bs(NULL, device, &err);
 565             if (!bs) {
 566                 goto fail;
 567             }
 568         }
 569     }
 570
 571     if (bs) {
 572         blk = local_blk = blk_new(bdrv_get_aio_context(bs), 0, BLK_PERM_ALL);
 573         ret = blk_insert_bs(blk, bs, &err);
 574         if (ret < 0) {
 575             goto fail;
 576         }
 577     }
 578
 579     /*
 580      * Notably absent: Proper permission management. This is sad, but it seems
 581      * almost impossible to achieve without changing the semantics and thereby
 582      * limiting the use cases of the qemu-io HMP command.
 583      *
 584      * In an ideal world we would unconditionally create a new BlockBackend for
 585      * qemuio_command(), but we have commands like 'reopen' and want them to
 586      * take effect on the exact BlockBackend whose name the user passed instead
 587      * of just on a temporary copy of it.
 588      *
 589      * Another problem is that deleting the temporary BlockBackend involves
 590      * draining all requests on it first, but some qemu-iotests cases want to
 591      * issue multiple aio_read/write requests and expect them to complete in
 592      * the background while the monitor has already returned.
 593      *
 594      * This is also what prevents us from saving the original permissions and
 595      * restoring them later: We can't revoke permissions until all requests
 596      * have completed, and we don't know when that is nor can we really let
 597      * anything else run before we have revoken them to avoid race conditions.
 598      *
 599      * What happens now is that command() in qemu-io-cmds.c can extend the
 600      * permissions if necessary for the qemu-io command. And they simply stay
 601      * extended, possibly resulting in a read-only guest device keeping write
 602      * permissions. Ugly, but it appears to be the lesser evil.
 603      */
 604     qemuio_command(blk, command);
 605
 606 fail:
 607     blk_unref(local_blk);
 608     hmp_handle_error(mon, err);
 609 }
 610
 611 static void print_block_info(Monitor *mon, BlockInfo *info,
 612                              BlockDeviceInfo *inserted, bool verbose)
 613 {
 614     ImageInfo *image_info;
 615
 616     assert(!info || !info->inserted || info->inserted == inserted);
 617
 618     if (info && *info->device) {
 619         monitor_puts(mon, info->device);
 620         if (inserted && inserted->node_name) {
 621             monitor_printf(mon, " (%s)", inserted->node_name);
 622         }
 623     } else {
 624         assert(info || inserted);
 625         monitor_puts(mon,
 626                      inserted && inserted->node_name ? inserted->node_name
 627                      : info && info->qdev ? info->qdev
 628                      : "<anonymous>");
 629     }
 630
 631     if (inserted) {
 632         monitor_printf(mon, ": %s (%s%s%s)\n",
 633                        inserted->file,
 634                        inserted->drv,
 635                        inserted->ro ? ", read-only" : "",
 636                        inserted->encrypted ? ", encrypted" : "");
 637     } else {
 638         monitor_printf(mon, ": [not inserted]\n");
 639     }
 640
 641     if (info) {
 642         if (info->qdev) {
 643             monitor_printf(mon, "    Attached to:      %s\n", info->qdev);
 644         }
 645         if (info->has_io_status && info->io_status != BLOCK_DEVICE_IO_STATUS_OK) {
 646             monitor_printf(mon, "    I/O status:       %s\n",
 647                            BlockDeviceIoStatus_str(info->io_status));
 648         }
 649
 650         if (info->removable) {
 651             monitor_printf(mon, "    Removable device: %slocked, tray %s\n",
 652                            info->locked ? "" : "not ",
 653                            info->tray_open ? "open" : "closed");
 654         }
 655     }
 656
 657
 658     if (!inserted) {
 659         return;
 660     }
 661
 662     monitor_printf(mon, "    Cache mode:       %s%s%s\n",
 663                    inserted->cache->writeback ? "writeback" : "writethrough",
 664                    inserted->cache->direct ? ", direct" : "",
 665                    inserted->cache->no_flush ? ", ignore flushes" : "");
 666
 667     if (inserted->backing_file) {
 668         monitor_printf(mon,
 669                        "    Backing file:     %s "
 670                        "(chain depth: %" PRId64 ")\n",
 671                        inserted->backing_file,
 672                        inserted->backing_file_depth);
 673     }
 674
 675     if (inserted->detect_zeroes != BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF) {
 676         monitor_printf(mon, "    Detect zeroes:    %s\n",
 677                 BlockdevDetectZeroesOptions_str(inserted->detect_zeroes));
 678     }
 679
 680     if (inserted->bps  || inserted->bps_rd  || inserted->bps_wr  ||
 681         inserted->iops || inserted->iops_rd || inserted->iops_wr)
 682     {
 683         monitor_printf(mon, "    I/O throttling:   bps=%" PRId64
 684                         " bps_rd=%" PRId64  " bps_wr=%" PRId64
 685                         " bps_max=%" PRId64
 686                         " bps_rd_max=%" PRId64
 687                         " bps_wr_max=%" PRId64
 688                         " iops=%" PRId64 " iops_rd=%" PRId64
 689                         " iops_wr=%" PRId64
 690                         " iops_max=%" PRId64
 691                         " iops_rd_max=%" PRId64
 692                         " iops_wr_max=%" PRId64
 693                         " iops_size=%" PRId64
 694                         " group=%s\n",
 695                         inserted->bps,
 696                         inserted->bps_rd,
 697                         inserted->bps_wr,
 698                         inserted->bps_max,
 699                         inserted->bps_rd_max,
 700                         inserted->bps_wr_max,
 701                         inserted->iops,
 702                         inserted->iops_rd,
 703                         inserted->iops_wr,
 704                         inserted->iops_max,
 705                         inserted->iops_rd_max,
 706                         inserted->iops_wr_max,
 707                         inserted->iops_size,
 708                         inserted->group);
 709     }
 710
 711     if (verbose) {
 712         monitor_printf(mon, "\nImages:\n");
 713         image_info = inserted->image;
 714         while (1) {
 715             bdrv_node_info_dump(qapi_ImageInfo_base(image_info), 0, false);
 716             if (image_info->backing_image) {
 717                 image_info = image_info->backing_image;
 718             } else {
 719                 break;
 720             }
 721         }
 722     }
 723 }
 724
 725 void hmp_info_block(Monitor *mon, const QDict *qdict)
 726 {
 727     BlockInfoList *block_list, *info;
 728     BlockDeviceInfoList *blockdev_list, *blockdev;
 729     const char *device = qdict_get_try_str(qdict, "device");
 730     bool verbose = qdict_get_try_bool(qdict, "verbose", false);
 731     bool nodes = qdict_get_try_bool(qdict, "nodes", false);
 732     bool printed = false;
 733
 734     /* Print BlockBackend information */
 735     if (!nodes) {
 736         block_list = qmp_query_block(NULL);
 737     } else {
 738         block_list = NULL;
 739     }
 740
 741     for (info = block_list; info; info = info->next) {
 742         if (device && strcmp(device, info->value->device)) {
 743             continue;
 744         }
 745
 746         if (info != block_list) {
 747             monitor_printf(mon, "\n");
 748         }
 749
 750         print_block_info(mon, info->value, info->value->inserted,
 751                          verbose);
 752         printed = true;
 753     }
 754
 755     qapi_free_BlockInfoList(block_list);
 756
 757     if ((!device && !nodes) || printed) {
 758         return;
 759     }
 760
 761     /* Print node information */
 762     blockdev_list = qmp_query_named_block_nodes(false, false, NULL);
 763     for (blockdev = blockdev_list; blockdev; blockdev = blockdev->next) {
 764         assert(blockdev->value->node_name);
 765         if (device && strcmp(device, blockdev->value->node_name)) {
 766             continue;
 767         }
 768
 769         if (blockdev != blockdev_list) {
 770             monitor_printf(mon, "\n");
 771         }
 772
 773         print_block_info(mon, NULL, blockdev->value, verbose);
 774     }
 775     qapi_free_BlockDeviceInfoList(blockdev_list);
 776 }
 777
 778 void hmp_info_blockstats(Monitor *mon, const QDict *qdict)
 779 {
 780     BlockStatsList *stats_list, *stats;
 781
 782     stats_list = qmp_query_blockstats(false, false, NULL);
 783
 784     for (stats = stats_list; stats; stats = stats->next) {
 785         if (!stats->value->device) {
 786             continue;
 787         }
 788
 789         monitor_printf(mon, "%s:", stats->value->device);
 790         monitor_printf(mon, " rd_bytes=%" PRId64
 791                        " wr_bytes=%" PRId64
 792                        " rd_operations=%" PRId64
 793                        " wr_operations=%" PRId64
 794                        " flush_operations=%" PRId64
 795                        " wr_total_time_ns=%" PRId64
 796                        " rd_total_time_ns=%" PRId64
 797                        " flush_total_time_ns=%" PRId64
 798                        " rd_merged=%" PRId64
 799                        " wr_merged=%" PRId64
 800                        " idle_time_ns=%" PRId64
 801                        "\n",
 802                        stats->value->stats->rd_bytes,
 803                        stats->value->stats->wr_bytes,
 804                        stats->value->stats->rd_operations,
 805                        stats->value->stats->wr_operations,
 806                        stats->value->stats->flush_operations,
 807                        stats->value->stats->wr_total_time_ns,
 808                        stats->value->stats->rd_total_time_ns,
 809                        stats->value->stats->flush_total_time_ns,
 810                        stats->value->stats->rd_merged,
 811                        stats->value->stats->wr_merged,
 812                        stats->value->stats->idle_time_ns);
 813     }
 814
 815     qapi_free_BlockStatsList(stats_list);
 816 }
 817
 818 void hmp_info_block_jobs(Monitor *mon, const QDict *qdict)
 819 {
 820     BlockJobInfoList *list;
 821
 822     list = qmp_query_block_jobs(&error_abort);
 823
 824     if (!list) {
 825         monitor_printf(mon, "No active jobs\n");
 826         return;
 827     }
 828
 829     while (list) {
 830         if (list->value->type == JOB_TYPE_STREAM) {
 831             monitor_printf(mon, "Streaming device %s: Completed %" PRId64
 832                            " of %" PRId64 " bytes, speed limit %" PRId64
 833                            " bytes/s\n",
 834                            list->value->device,
 835                            list->value->offset,
 836                            list->value->len,
 837                            list->value->speed);
 838         } else {
 839             monitor_printf(mon, "Type %s, device %s: Completed %" PRId64
 840                            " of %" PRId64 " bytes, speed limit %" PRId64
 841                            " bytes/s\n",
 842                            JobType_str(list->value->type),
 843                            list->value->device,
 844                            list->value->offset,
 845                            list->value->len,
 846                            list->value->speed);
 847         }
 848         list = list->next;
 849     }
 850
 851     qapi_free_BlockJobInfoList(list);
 852 }
 853
 854 void hmp_info_snapshots(Monitor *mon, const QDict *qdict)
 855 {
 856     BlockDriverState *bs, *bs1;
 857     BdrvNextIterator it1;
 858     QEMUSnapshotInfo *sn_tab, *sn;
 859     bool no_snapshot = true;
 860     int nb_sns, i;
 861     int total;
 862     int *global_snapshots;
 863
 864     typedef struct SnapshotEntry {
 865         QEMUSnapshotInfo sn;
 866         QTAILQ_ENTRY(SnapshotEntry) next;
 867     } SnapshotEntry;
 868
 869     typedef struct ImageEntry {
 870         const char *imagename;
 871         QTAILQ_ENTRY(ImageEntry) next;
 872         QTAILQ_HEAD(, SnapshotEntry) snapshots;
 873     } ImageEntry;
 874
 875     QTAILQ_HEAD(, ImageEntry) image_list =
 876         QTAILQ_HEAD_INITIALIZER(image_list);
 877
 878     ImageEntry *image_entry, *next_ie;
 879     SnapshotEntry *snapshot_entry;
 880     Error *err = NULL;
 881
 882     GRAPH_RDLOCK_GUARD_MAINLOOP();
 883
 884     bs = bdrv_all_find_vmstate_bs(NULL, false, NULL, &err);
 885     if (!bs) {
 886         error_report_err(err);
 887         return;
 888     }
 889
 890     nb_sns = bdrv_snapshot_list(bs, &sn_tab);
 891
 892     if (nb_sns < 0) {
 893         monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
 894         return;
 895     }
 896
 897     for (bs1 = bdrv_first(&it1); bs1; bs1 = bdrv_next(&it1)) {
 898         int bs1_nb_sns = 0;
 899         ImageEntry *ie;
 900         SnapshotEntry *se;
 901
 902         if (bdrv_can_snapshot(bs1)) {
 903             sn = NULL;
 904             bs1_nb_sns = bdrv_snapshot_list(bs1, &sn);
 905             if (bs1_nb_sns > 0) {
 906                 no_snapshot = false;
 907                 ie = g_new0(ImageEntry, 1);
 908                 ie->imagename = bdrv_get_device_name(bs1);
 909                 QTAILQ_INIT(&ie->snapshots);
 910                 QTAILQ_INSERT_TAIL(&image_list, ie, next);
 911                 for (i = 0; i < bs1_nb_sns; i++) {
 912                     se = g_new0(SnapshotEntry, 1);
 913                     se->sn = sn[i];
 914                     QTAILQ_INSERT_TAIL(&ie->snapshots, se, next);
 915                 }
 916             }
 917             g_free(sn);
 918         }
 919     }
 920
 921     if (no_snapshot) {
 922         monitor_printf(mon, "There is no snapshot available.\n");
 923         return;
 924     }
 925
 926     global_snapshots = g_new0(int, nb_sns);
 927     total = 0;
 928     for (i = 0; i < nb_sns; i++) {
 929         SnapshotEntry *next_sn;
 930         if (bdrv_all_has_snapshot(sn_tab[i].name, false, NULL, NULL) == 1) {
 931             global_snapshots[total] = i;
 932             total++;
 933             QTAILQ_FOREACH(image_entry, &image_list, next) {
 934                 QTAILQ_FOREACH_SAFE(snapshot_entry, &image_entry->snapshots,
 935                                     next, next_sn) {
 936                     if (!strcmp(sn_tab[i].name, snapshot_entry->sn.name)) {
 937                         QTAILQ_REMOVE(&image_entry->snapshots, snapshot_entry,
 938                                       next);
 939                         g_free(snapshot_entry);
 940                     }
 941                 }
 942             }
 943         }
 944     }
 945     monitor_printf(mon, "List of snapshots present on all disks:\n");
 946
 947     if (total > 0) {
 948         bdrv_snapshot_dump(NULL);
 949         monitor_printf(mon, "\n");
 950         for (i = 0; i < total; i++) {
 951             sn = &sn_tab[global_snapshots[i]];
 952             /*
 953              * The ID is not guaranteed to be the same on all images, so
 954              * overwrite it.
 955              */
 956             pstrcpy(sn->id_str, sizeof(sn->id_str), "--");
 957             bdrv_snapshot_dump(sn);
 958             monitor_printf(mon, "\n");
 959         }
 960     } else {
 961         monitor_printf(mon, "None\n");
 962     }
 963
 964     QTAILQ_FOREACH(image_entry, &image_list, next) {
 965         if (QTAILQ_EMPTY(&image_entry->snapshots)) {
 966             continue;
 967         }
 968         monitor_printf(mon,
 969                        "\nList of partial (non-loadable) snapshots on '%s':\n",
 970                        image_entry->imagename);
 971         bdrv_snapshot_dump(NULL);
 972         monitor_printf(mon, "\n");
 973         QTAILQ_FOREACH(snapshot_entry, &image_entry->snapshots, next) {
 974             bdrv_snapshot_dump(&snapshot_entry->sn);
 975             monitor_printf(mon, "\n");
 976         }
 977     }
 978
 979     QTAILQ_FOREACH_SAFE(image_entry, &image_list, next, next_ie) {
 980         SnapshotEntry *next_sn;
 981         QTAILQ_FOREACH_SAFE(snapshot_entry, &image_entry->snapshots, next,
 982                             next_sn) {
 983             g_free(snapshot_entry);
 984         }
 985         g_free(image_entry);
 986     }
 987     g_free(sn_tab);
 988     g_free(global_snapshots);
 989 }
 990
 991 void hmp_change_medium(Monitor *mon, const char *device, const char *target,
 992                        const char *arg, const char *read_only, bool force,
 993                        Error **errp)
 994 {
 995     ERRP_GUARD();
 996     BlockdevChangeReadOnlyMode read_only_mode = 0;
 997
 998     if (read_only) {
 999         read_only_mode =
1000             qapi_enum_parse(&BlockdevChangeReadOnlyMode_lookup,
1001                             read_only,
1002                             BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN, errp);
1003         if (*errp) {
1004             return;
1005         }
1006     }
1007
1008     qmp_blockdev_change_medium(device, NULL, target, arg, true, force,
1009                                !!read_only, read_only_mode, errp);
1010 }