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     AioContext *aio_context;
 145     Error *local_err = NULL;
 146
 147     GLOBAL_STATE_CODE();
 148     GRAPH_RDLOCK_GUARD_MAINLOOP();
 149
 150     bs = bdrv_find_node(id);
 151     if (bs) {
 152         qmp_blockdev_del(id, &local_err);
 153         if (local_err) {
 154             error_report_err(local_err);
 155         }
 156         return;
 157     }
 158
 159     blk = blk_by_name(id);
 160     if (!blk) {
 161         error_report("Device '%s' not found", id);
 162         return;
 163     }
 164
 165     if (!blk_legacy_dinfo(blk)) {
 166         error_report("Deleting device added with blockdev-add"
 167                      " is not supported");
 168         return;
 169     }
 170
 171     aio_context = blk_get_aio_context(blk);
 172     aio_context_acquire(aio_context);
 173
 174     bs = blk_bs(blk);
 175     if (bs) {
 176         if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
 177             error_report_err(local_err);
 178             aio_context_release(aio_context);
 179             return;
 180         }
 181
 182         blk_remove_bs(blk);
 183     }
 184
 185     /* Make the BlockBackend and the attached BlockDriverState anonymous */
 186     monitor_remove_blk(blk);
 187
 188     /*
 189      * If this BlockBackend has a device attached to it, its refcount will be
 190      * decremented when the device is removed; otherwise we have to do so here.
 191      */
 192     if (blk_get_attached_dev(blk)) {
 193         /* Further I/O must not pause the guest */
 194         blk_set_on_error(blk, BLOCKDEV_ON_ERROR_REPORT,
 195                          BLOCKDEV_ON_ERROR_REPORT);
 196     } else {
 197         blk_unref(blk);
 198     }
 199
 200     aio_context_release(aio_context);
 201 }
 202
 203 void hmp_commit(Monitor *mon, const QDict *qdict)
 204 {
 205     const char *device = qdict_get_str(qdict, "device");
 206     BlockBackend *blk;
 207     int ret;
 208
 209     if (!strcmp(device, "all")) {
 210         ret = blk_commit_all();
 211     } else {
 212         BlockDriverState *bs;
 213         AioContext *aio_context;
 214
 215         blk = blk_by_name(device);
 216         if (!blk) {
 217             error_report("Device '%s' not found", device);
 218             return;
 219         }
 220
 221         bs = bdrv_skip_implicit_filters(blk_bs(blk));
 222         aio_context = bdrv_get_aio_context(bs);
 223         aio_context_acquire(aio_context);
 224
 225         if (!blk_is_available(blk)) {
 226             error_report("Device '%s' has no medium", device);
 227             aio_context_release(aio_context);
 228             return;
 229         }
 230
 231         ret = bdrv_commit(bs);
 232
 233         aio_context_release(aio_context);
 234     }
 235     if (ret < 0) {
 236         error_report("'commit' error for '%s': %s", device, strerror(-ret));
 237     }
 238 }
 239
 240 void hmp_drive_mirror(Monitor *mon, const QDict *qdict)
 241 {
 242     const char *filename = qdict_get_str(qdict, "target");
 243     const char *format = qdict_get_try_str(qdict, "format");
 244     bool reuse = qdict_get_try_bool(qdict, "reuse", false);
 245     bool full = qdict_get_try_bool(qdict, "full", false);
 246     Error *err = NULL;
 247     DriveMirror mirror = {
 248         .device = (char *)qdict_get_str(qdict, "device"),
 249         .target = (char *)filename,
 250         .format = (char *)format,
 251         .sync = full ? MIRROR_SYNC_MODE_FULL : MIRROR_SYNC_MODE_TOP,
 252         .has_mode = true,
 253         .mode = reuse ? NEW_IMAGE_MODE_EXISTING : NEW_IMAGE_MODE_ABSOLUTE_PATHS,
 254         .unmap = true,
 255     };
 256
 257     if (!filename) {
 258         error_setg(&err, QERR_MISSING_PARAMETER, "target");
 259         goto end;
 260     }
 261     qmp_drive_mirror(&mirror, &err);
 262 end:
 263     hmp_handle_error(mon, err);
 264 }
 265
 266 void hmp_drive_backup(Monitor *mon, const QDict *qdict)
 267 {
 268     const char *device = qdict_get_str(qdict, "device");
 269     const char *filename = qdict_get_str(qdict, "target");
 270     const char *format = qdict_get_try_str(qdict, "format");
 271     bool reuse = qdict_get_try_bool(qdict, "reuse", false);
 272     bool full = qdict_get_try_bool(qdict, "full", false);
 273     bool compress = qdict_get_try_bool(qdict, "compress", false);
 274     Error *err = NULL;
 275     DriveBackup backup = {
 276         .device = (char *)device,
 277         .target = (char *)filename,
 278         .format = (char *)format,
 279         .sync = full ? MIRROR_SYNC_MODE_FULL : MIRROR_SYNC_MODE_TOP,
 280         .has_mode = true,
 281         .mode = reuse ? NEW_IMAGE_MODE_EXISTING : NEW_IMAGE_MODE_ABSOLUTE_PATHS,
 282         .has_compress = !!compress,
 283         .compress = compress,
 284     };
 285
 286     if (!filename) {
 287         error_setg(&err, QERR_MISSING_PARAMETER, "target");
 288         goto end;
 289     }
 290
 291     qmp_drive_backup(&backup, &err);
 292 end:
 293     hmp_handle_error(mon, err);
 294 }
 295
 296 void hmp_block_job_set_speed(Monitor *mon, const QDict *qdict)
 297 {
 298     Error *error = NULL;
 299     const char *device = qdict_get_str(qdict, "device");
 300     int64_t value = qdict_get_int(qdict, "speed");
 301
 302     qmp_block_job_set_speed(device, value, &error);
 303
 304     hmp_handle_error(mon, error);
 305 }
 306
 307 void hmp_block_job_cancel(Monitor *mon, const QDict *qdict)
 308 {
 309     Error *error = NULL;
 310     const char *device = qdict_get_str(qdict, "device");
 311     bool force = qdict_get_try_bool(qdict, "force", false);
 312
 313     qmp_block_job_cancel(device, true, force, &error);
 314
 315     hmp_handle_error(mon, error);
 316 }
 317
 318 void hmp_block_job_pause(Monitor *mon, const QDict *qdict)
 319 {
 320     Error *error = NULL;
 321     const char *device = qdict_get_str(qdict, "device");
 322
 323     qmp_block_job_pause(device, &error);
 324
 325     hmp_handle_error(mon, error);
 326 }
 327
 328 void hmp_block_job_resume(Monitor *mon, const QDict *qdict)
 329 {
 330     Error *error = NULL;
 331     const char *device = qdict_get_str(qdict, "device");
 332
 333     qmp_block_job_resume(device, &error);
 334
 335     hmp_handle_error(mon, error);
 336 }
 337
 338 void hmp_block_job_complete(Monitor *mon, const QDict *qdict)
 339 {
 340     Error *error = NULL;
 341     const char *device = qdict_get_str(qdict, "device");
 342
 343     qmp_block_job_complete(device, &error);
 344
 345     hmp_handle_error(mon, error);
 346 }
 347
 348 void hmp_snapshot_blkdev(Monitor *mon, const QDict *qdict)
 349 {
 350     const char *device = qdict_get_str(qdict, "device");
 351     const char *filename = qdict_get_try_str(qdict, "snapshot-file");
 352     const char *format = qdict_get_try_str(qdict, "format");
 353     bool reuse = qdict_get_try_bool(qdict, "reuse", false);
 354     enum NewImageMode mode;
 355     Error *err = NULL;
 356
 357     if (!filename) {
 358         /*
 359          * In the future, if 'snapshot-file' is not specified, the snapshot
 360          * will be taken internally. Today it's actually required.
 361          */
 362         error_setg(&err, QERR_MISSING_PARAMETER, "snapshot-file");
 363         goto end;
 364     }
 365
 366     mode = reuse ? NEW_IMAGE_MODE_EXISTING : NEW_IMAGE_MODE_ABSOLUTE_PATHS;
 367     qmp_blockdev_snapshot_sync(device, NULL, filename, NULL, format,
 368                                true, mode, &err);
 369 end:
 370     hmp_handle_error(mon, err);
 371 }
 372
 373 void hmp_snapshot_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     Error *err = NULL;
 378
 379     qmp_blockdev_snapshot_internal_sync(device, name, &err);
 380     hmp_handle_error(mon, err);
 381 }
 382
 383 void hmp_snapshot_delete_blkdev_internal(Monitor *mon, const QDict *qdict)
 384 {
 385     const char *device = qdict_get_str(qdict, "device");
 386     const char *name = qdict_get_str(qdict, "name");
 387     const char *id = qdict_get_try_str(qdict, "id");
 388     Error *err = NULL;
 389
 390     qmp_blockdev_snapshot_delete_internal_sync(device, id, name, &err);
 391     hmp_handle_error(mon, err);
 392 }
 393
 394 void hmp_nbd_server_start(Monitor *mon, const QDict *qdict)
 395 {
 396     const char *uri = qdict_get_str(qdict, "uri");
 397     bool writable = qdict_get_try_bool(qdict, "writable", false);
 398     bool all = qdict_get_try_bool(qdict, "all", false);
 399     Error *local_err = NULL;
 400     BlockInfoList *block_list, *info;
 401     SocketAddress *addr;
 402     NbdServerAddOptions export;
 403
 404     if (writable && !all) {
 405         error_setg(&local_err, "-w only valid together with -a");
 406         goto exit;
 407     }
 408
 409     /* First check if the address is valid and start the server.  */
 410     addr = socket_parse(uri, &local_err);
 411     if (local_err != NULL) {
 412         goto exit;
 413     }
 414
 415     nbd_server_start(addr, NULL, NULL, 0, &local_err);
 416     qapi_free_SocketAddress(addr);
 417     if (local_err != NULL) {
 418         goto exit;
 419     }
 420
 421     if (!all) {
 422         return;
 423     }
 424
 425     /* Then try adding all block devices.  If one fails, close all and
 426      * exit.
 427      */
 428     block_list = qmp_query_block(NULL);
 429
 430     for (info = block_list; info; info = info->next) {
 431         if (!info->value->inserted) {
 432             continue;
 433         }
 434
 435         export = (NbdServerAddOptions) {
 436             .device         = info->value->device,
 437             .has_writable   = true,
 438             .writable       = writable,
 439         };
 440
 441         qmp_nbd_server_add(&export, &local_err);
 442
 443         if (local_err != NULL) {
 444             qmp_nbd_server_stop(NULL);
 445             break;
 446         }
 447     }
 448
 449     qapi_free_BlockInfoList(block_list);
 450
 451 exit:
 452     hmp_handle_error(mon, local_err);
 453 }
 454
 455 void hmp_nbd_server_add(Monitor *mon, const QDict *qdict)
 456 {
 457     const char *device = qdict_get_str(qdict, "device");
 458     const char *name = qdict_get_try_str(qdict, "name");
 459     bool writable = qdict_get_try_bool(qdict, "writable", false);
 460     Error *local_err = NULL;
 461
 462     NbdServerAddOptions export = {
 463         .device         = (char *) device,
 464         .name           = (char *) name,
 465         .has_writable   = true,
 466         .writable       = writable,
 467     };
 468
 469     qmp_nbd_server_add(&export, &local_err);
 470     hmp_handle_error(mon, local_err);
 471 }
 472
 473 void hmp_nbd_server_remove(Monitor *mon, const QDict *qdict)
 474 {
 475     const char *name = qdict_get_str(qdict, "name");
 476     bool force = qdict_get_try_bool(qdict, "force", false);
 477     Error *err = NULL;
 478
 479     /* Rely on BLOCK_EXPORT_REMOVE_MODE_SAFE being the default */
 480     qmp_nbd_server_remove(name, force, BLOCK_EXPORT_REMOVE_MODE_HARD, &err);
 481     hmp_handle_error(mon, err);
 482 }
 483
 484 void hmp_nbd_server_stop(Monitor *mon, const QDict *qdict)
 485 {
 486     Error *err = NULL;
 487
 488     qmp_nbd_server_stop(&err);
 489     hmp_handle_error(mon, err);
 490 }
 491
 492 void coroutine_fn hmp_block_resize(Monitor *mon, const QDict *qdict)
 493 {
 494     const char *device = qdict_get_str(qdict, "device");
 495     int64_t size = qdict_get_int(qdict, "size");
 496     Error *err = NULL;
 497
 498     qmp_block_resize(device, NULL, size, &err);
 499     hmp_handle_error(mon, err);
 500 }
 501
 502 void hmp_block_stream(Monitor *mon, const QDict *qdict)
 503 {
 504     Error *error = NULL;
 505     const char *device = qdict_get_str(qdict, "device");
 506     const char *base = qdict_get_try_str(qdict, "base");
 507     int64_t speed = qdict_get_try_int(qdict, "speed", 0);
 508
 509     qmp_block_stream(device, device, base, NULL, NULL, NULL,
 510                      qdict_haskey(qdict, "speed"), speed,
 511                      true, BLOCKDEV_ON_ERROR_REPORT, NULL,
 512                      false, false, false, false, &error);
 513
 514     hmp_handle_error(mon, error);
 515 }
 516
 517 void hmp_block_set_io_throttle(Monitor *mon, const QDict *qdict)
 518 {
 519     Error *err = NULL;
 520     char *device = (char *) qdict_get_str(qdict, "device");
 521     BlockIOThrottle throttle = {
 522         .bps = qdict_get_int(qdict, "bps"),
 523         .bps_rd = qdict_get_int(qdict, "bps_rd"),
 524         .bps_wr = qdict_get_int(qdict, "bps_wr"),
 525         .iops = qdict_get_int(qdict, "iops"),
 526         .iops_rd = qdict_get_int(qdict, "iops_rd"),
 527         .iops_wr = qdict_get_int(qdict, "iops_wr"),
 528     };
 529
 530     /*
 531      * qmp_block_set_io_throttle has separate parameters for the
 532      * (deprecated) block device name and the qdev ID but the HMP
 533      * version has only one, so we must decide which one to pass.
 534      */
 535     if (blk_by_name(device)) {
 536         throttle.device = device;
 537     } else {
 538         throttle.id = device;
 539     }
 540
 541     qmp_block_set_io_throttle(&throttle, &err);
 542     hmp_handle_error(mon, err);
 543 }
 544
 545 void hmp_eject(Monitor *mon, const QDict *qdict)
 546 {
 547     bool force = qdict_get_try_bool(qdict, "force", false);
 548     const char *device = qdict_get_str(qdict, "device");
 549     Error *err = NULL;
 550
 551     qmp_eject(device, NULL, true, force, &err);
 552     hmp_handle_error(mon, err);
 553 }
 554
 555 void hmp_qemu_io(Monitor *mon, const QDict *qdict)
 556 {
 557     BlockBackend *blk = NULL;
 558     BlockDriverState *bs = NULL;
 559     BlockBackend *local_blk = NULL;
 560     AioContext *ctx = NULL;
 561     bool qdev = qdict_get_try_bool(qdict, "qdev", false);
 562     const char *device = qdict_get_str(qdict, "device");
 563     const char *command = qdict_get_str(qdict, "command");
 564     Error *err = NULL;
 565     int ret;
 566
 567     if (qdev) {
 568         blk = blk_by_qdev_id(device, &err);
 569         if (!blk) {
 570             goto fail;
 571         }
 572     } else {
 573         blk = blk_by_name(device);
 574         if (!blk) {
 575             bs = bdrv_lookup_bs(NULL, device, &err);
 576             if (!bs) {
 577                 goto fail;
 578             }
 579         }
 580     }
 581
 582     ctx = blk ? blk_get_aio_context(blk) : bdrv_get_aio_context(bs);
 583     aio_context_acquire(ctx);
 584
 585     if (bs) {
 586         blk = local_blk = blk_new(bdrv_get_aio_context(bs), 0, BLK_PERM_ALL);
 587         ret = blk_insert_bs(blk, bs, &err);
 588         if (ret < 0) {
 589             goto fail;
 590         }
 591     }
 592
 593     /*
 594      * Notably absent: Proper permission management. This is sad, but it seems
 595      * almost impossible to achieve without changing the semantics and thereby
 596      * limiting the use cases of the qemu-io HMP command.
 597      *
 598      * In an ideal world we would unconditionally create a new BlockBackend for
 599      * qemuio_command(), but we have commands like 'reopen' and want them to
 600      * take effect on the exact BlockBackend whose name the user passed instead
 601      * of just on a temporary copy of it.
 602      *
 603      * Another problem is that deleting the temporary BlockBackend involves
 604      * draining all requests on it first, but some qemu-iotests cases want to
 605      * issue multiple aio_read/write requests and expect them to complete in
 606      * the background while the monitor has already returned.
 607      *
 608      * This is also what prevents us from saving the original permissions and
 609      * restoring them later: We can't revoke permissions until all requests
 610      * have completed, and we don't know when that is nor can we really let
 611      * anything else run before we have revoken them to avoid race conditions.
 612      *
 613      * What happens now is that command() in qemu-io-cmds.c can extend the
 614      * permissions if necessary for the qemu-io command. And they simply stay
 615      * extended, possibly resulting in a read-only guest device keeping write
 616      * permissions. Ugly, but it appears to be the lesser evil.
 617      */
 618     qemuio_command(blk, command);
 619
 620 fail:
 621     blk_unref(local_blk);
 622
 623     if (ctx) {
 624         aio_context_release(ctx);
 625     }
 626
 627     hmp_handle_error(mon, err);
 628 }
 629
 630 static void print_block_info(Monitor *mon, BlockInfo *info,
 631                              BlockDeviceInfo *inserted, bool verbose)
 632 {
 633     ImageInfo *image_info;
 634
 635     assert(!info || !info->inserted || info->inserted == inserted);
 636
 637     if (info && *info->device) {
 638         monitor_puts(mon, info->device);
 639         if (inserted && inserted->node_name) {
 640             monitor_printf(mon, " (%s)", inserted->node_name);
 641         }
 642     } else {
 643         assert(info || inserted);
 644         monitor_puts(mon,
 645                      inserted && inserted->node_name ? inserted->node_name
 646                      : info && info->qdev ? info->qdev
 647                      : "<anonymous>");
 648     }
 649
 650     if (inserted) {
 651         monitor_printf(mon, ": %s (%s%s%s)\n",
 652                        inserted->file,
 653                        inserted->drv,
 654                        inserted->ro ? ", read-only" : "",
 655                        inserted->encrypted ? ", encrypted" : "");
 656     } else {
 657         monitor_printf(mon, ": [not inserted]\n");
 658     }
 659
 660     if (info) {
 661         if (info->qdev) {
 662             monitor_printf(mon, "    Attached to:      %s\n", info->qdev);
 663         }
 664         if (info->has_io_status && info->io_status != BLOCK_DEVICE_IO_STATUS_OK) {
 665             monitor_printf(mon, "    I/O status:       %s\n",
 666                            BlockDeviceIoStatus_str(info->io_status));
 667         }
 668
 669         if (info->removable) {
 670             monitor_printf(mon, "    Removable device: %slocked, tray %s\n",
 671                            info->locked ? "" : "not ",
 672                            info->tray_open ? "open" : "closed");
 673         }
 674     }
 675
 676
 677     if (!inserted) {
 678         return;
 679     }
 680
 681     monitor_printf(mon, "    Cache mode:       %s%s%s\n",
 682                    inserted->cache->writeback ? "writeback" : "writethrough",
 683                    inserted->cache->direct ? ", direct" : "",
 684                    inserted->cache->no_flush ? ", ignore flushes" : "");
 685
 686     if (inserted->backing_file) {
 687         monitor_printf(mon,
 688                        "    Backing file:     %s "
 689                        "(chain depth: %" PRId64 ")\n",
 690                        inserted->backing_file,
 691                        inserted->backing_file_depth);
 692     }
 693
 694     if (inserted->detect_zeroes != BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF) {
 695         monitor_printf(mon, "    Detect zeroes:    %s\n",
 696                 BlockdevDetectZeroesOptions_str(inserted->detect_zeroes));
 697     }
 698
 699     if (inserted->bps  || inserted->bps_rd  || inserted->bps_wr  ||
 700         inserted->iops || inserted->iops_rd || inserted->iops_wr)
 701     {
 702         monitor_printf(mon, "    I/O throttling:   bps=%" PRId64
 703                         " bps_rd=%" PRId64  " bps_wr=%" PRId64
 704                         " bps_max=%" PRId64
 705                         " bps_rd_max=%" PRId64
 706                         " bps_wr_max=%" PRId64
 707                         " iops=%" PRId64 " iops_rd=%" PRId64
 708                         " iops_wr=%" PRId64
 709                         " iops_max=%" PRId64
 710                         " iops_rd_max=%" PRId64
 711                         " iops_wr_max=%" PRId64
 712                         " iops_size=%" PRId64
 713                         " group=%s\n",
 714                         inserted->bps,
 715                         inserted->bps_rd,
 716                         inserted->bps_wr,
 717                         inserted->bps_max,
 718                         inserted->bps_rd_max,
 719                         inserted->bps_wr_max,
 720                         inserted->iops,
 721                         inserted->iops_rd,
 722                         inserted->iops_wr,
 723                         inserted->iops_max,
 724                         inserted->iops_rd_max,
 725                         inserted->iops_wr_max,
 726                         inserted->iops_size,
 727                         inserted->group);
 728     }
 729
 730     if (verbose) {
 731         monitor_printf(mon, "\nImages:\n");
 732         image_info = inserted->image;
 733         while (1) {
 734             bdrv_node_info_dump(qapi_ImageInfo_base(image_info), 0, false);
 735             if (image_info->backing_image) {
 736                 image_info = image_info->backing_image;
 737             } else {
 738                 break;
 739             }
 740         }
 741     }
 742 }
 743
 744 void hmp_info_block(Monitor *mon, const QDict *qdict)
 745 {
 746     BlockInfoList *block_list, *info;
 747     BlockDeviceInfoList *blockdev_list, *blockdev;
 748     const char *device = qdict_get_try_str(qdict, "device");
 749     bool verbose = qdict_get_try_bool(qdict, "verbose", false);
 750     bool nodes = qdict_get_try_bool(qdict, "nodes", false);
 751     bool printed = false;
 752
 753     /* Print BlockBackend information */
 754     if (!nodes) {
 755         block_list = qmp_query_block(NULL);
 756     } else {
 757         block_list = NULL;
 758     }
 759
 760     for (info = block_list; info; info = info->next) {
 761         if (device && strcmp(device, info->value->device)) {
 762             continue;
 763         }
 764
 765         if (info != block_list) {
 766             monitor_printf(mon, "\n");
 767         }
 768
 769         print_block_info(mon, info->value, info->value->inserted,
 770                          verbose);
 771         printed = true;
 772     }
 773
 774     qapi_free_BlockInfoList(block_list);
 775
 776     if ((!device && !nodes) || printed) {
 777         return;
 778     }
 779
 780     /* Print node information */
 781     blockdev_list = qmp_query_named_block_nodes(false, false, NULL);
 782     for (blockdev = blockdev_list; blockdev; blockdev = blockdev->next) {
 783         assert(blockdev->value->node_name);
 784         if (device && strcmp(device, blockdev->value->node_name)) {
 785             continue;
 786         }
 787
 788         if (blockdev != blockdev_list) {
 789             monitor_printf(mon, "\n");
 790         }
 791
 792         print_block_info(mon, NULL, blockdev->value, verbose);
 793     }
 794     qapi_free_BlockDeviceInfoList(blockdev_list);
 795 }
 796
 797 void hmp_info_blockstats(Monitor *mon, const QDict *qdict)
 798 {
 799     BlockStatsList *stats_list, *stats;
 800
 801     stats_list = qmp_query_blockstats(false, false, NULL);
 802
 803     for (stats = stats_list; stats; stats = stats->next) {
 804         if (!stats->value->device) {
 805             continue;
 806         }
 807
 808         monitor_printf(mon, "%s:", stats->value->device);
 809         monitor_printf(mon, " rd_bytes=%" PRId64
 810                        " wr_bytes=%" PRId64
 811                        " rd_operations=%" PRId64
 812                        " wr_operations=%" PRId64
 813                        " flush_operations=%" PRId64
 814                        " wr_total_time_ns=%" PRId64
 815                        " rd_total_time_ns=%" PRId64
 816                        " flush_total_time_ns=%" PRId64
 817                        " rd_merged=%" PRId64
 818                        " wr_merged=%" PRId64
 819                        " idle_time_ns=%" PRId64
 820                        "\n",
 821                        stats->value->stats->rd_bytes,
 822                        stats->value->stats->wr_bytes,
 823                        stats->value->stats->rd_operations,
 824                        stats->value->stats->wr_operations,
 825                        stats->value->stats->flush_operations,
 826                        stats->value->stats->wr_total_time_ns,
 827                        stats->value->stats->rd_total_time_ns,
 828                        stats->value->stats->flush_total_time_ns,
 829                        stats->value->stats->rd_merged,
 830                        stats->value->stats->wr_merged,
 831                        stats->value->stats->idle_time_ns);
 832     }
 833
 834     qapi_free_BlockStatsList(stats_list);
 835 }
 836
 837 void hmp_info_block_jobs(Monitor *mon, const QDict *qdict)
 838 {
 839     BlockJobInfoList *list;
 840
 841     list = qmp_query_block_jobs(&error_abort);
 842
 843     if (!list) {
 844         monitor_printf(mon, "No active jobs\n");
 845         return;
 846     }
 847
 848     while (list) {
 849         if (strcmp(list->value->type, "stream") == 0) {
 850             monitor_printf(mon, "Streaming device %s: Completed %" PRId64
 851                            " of %" PRId64 " bytes, speed limit %" PRId64
 852                            " bytes/s\n",
 853                            list->value->device,
 854                            list->value->offset,
 855                            list->value->len,
 856                            list->value->speed);
 857         } else {
 858             monitor_printf(mon, "Type %s, device %s: Completed %" PRId64
 859                            " of %" PRId64 " bytes, speed limit %" PRId64
 860                            " bytes/s\n",
 861                            list->value->type,
 862                            list->value->device,
 863                            list->value->offset,
 864                            list->value->len,
 865                            list->value->speed);
 866         }
 867         list = list->next;
 868     }
 869
 870     qapi_free_BlockJobInfoList(list);
 871 }
 872
 873 void hmp_info_snapshots(Monitor *mon, const QDict *qdict)
 874 {
 875     BlockDriverState *bs, *bs1;
 876     BdrvNextIterator it1;
 877     QEMUSnapshotInfo *sn_tab, *sn;
 878     bool no_snapshot = true;
 879     int nb_sns, i;
 880     int total;
 881     int *global_snapshots;
 882     AioContext *aio_context;
 883
 884     typedef struct SnapshotEntry {
 885         QEMUSnapshotInfo sn;
 886         QTAILQ_ENTRY(SnapshotEntry) next;
 887     } SnapshotEntry;
 888
 889     typedef struct ImageEntry {
 890         const char *imagename;
 891         QTAILQ_ENTRY(ImageEntry) next;
 892         QTAILQ_HEAD(, SnapshotEntry) snapshots;
 893     } ImageEntry;
 894
 895     QTAILQ_HEAD(, ImageEntry) image_list =
 896         QTAILQ_HEAD_INITIALIZER(image_list);
 897
 898     ImageEntry *image_entry, *next_ie;
 899     SnapshotEntry *snapshot_entry;
 900     Error *err = NULL;
 901
 902     GRAPH_RDLOCK_GUARD_MAINLOOP();
 903
 904     bs = bdrv_all_find_vmstate_bs(NULL, false, NULL, &err);
 905     if (!bs) {
 906         error_report_err(err);
 907         return;
 908     }
 909     aio_context = bdrv_get_aio_context(bs);
 910
 911     aio_context_acquire(aio_context);
 912     nb_sns = bdrv_snapshot_list(bs, &sn_tab);
 913     aio_context_release(aio_context);
 914
 915     if (nb_sns < 0) {
 916         monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
 917         return;
 918     }
 919
 920     for (bs1 = bdrv_first(&it1); bs1; bs1 = bdrv_next(&it1)) {
 921         int bs1_nb_sns = 0;
 922         ImageEntry *ie;
 923         SnapshotEntry *se;
 924         AioContext *ctx = bdrv_get_aio_context(bs1);
 925
 926         aio_context_acquire(ctx);
 927         if (bdrv_can_snapshot(bs1)) {
 928             sn = NULL;
 929             bs1_nb_sns = bdrv_snapshot_list(bs1, &sn);
 930             if (bs1_nb_sns > 0) {
 931                 no_snapshot = false;
 932                 ie = g_new0(ImageEntry, 1);
 933                 ie->imagename = bdrv_get_device_name(bs1);
 934                 QTAILQ_INIT(&ie->snapshots);
 935                 QTAILQ_INSERT_TAIL(&image_list, ie, next);
 936                 for (i = 0; i < bs1_nb_sns; i++) {
 937                     se = g_new0(SnapshotEntry, 1);
 938                     se->sn = sn[i];
 939                     QTAILQ_INSERT_TAIL(&ie->snapshots, se, next);
 940                 }
 941             }
 942             g_free(sn);
 943         }
 944         aio_context_release(ctx);
 945     }
 946
 947     if (no_snapshot) {
 948         monitor_printf(mon, "There is no snapshot available.\n");
 949         return;
 950     }
 951
 952     global_snapshots = g_new0(int, nb_sns);
 953     total = 0;
 954     for (i = 0; i < nb_sns; i++) {
 955         SnapshotEntry *next_sn;
 956         if (bdrv_all_has_snapshot(sn_tab[i].name, false, NULL, NULL) == 1) {
 957             global_snapshots[total] = i;
 958             total++;
 959             QTAILQ_FOREACH(image_entry, &image_list, next) {
 960                 QTAILQ_FOREACH_SAFE(snapshot_entry, &image_entry->snapshots,
 961                                     next, next_sn) {
 962                     if (!strcmp(sn_tab[i].name, snapshot_entry->sn.name)) {
 963                         QTAILQ_REMOVE(&image_entry->snapshots, snapshot_entry,
 964                                       next);
 965                         g_free(snapshot_entry);
 966                     }
 967                 }
 968             }
 969         }
 970     }
 971     monitor_printf(mon, "List of snapshots present on all disks:\n");
 972
 973     if (total > 0) {
 974         bdrv_snapshot_dump(NULL);
 975         monitor_printf(mon, "\n");
 976         for (i = 0; i < total; i++) {
 977             sn = &sn_tab[global_snapshots[i]];
 978             /*
 979              * The ID is not guaranteed to be the same on all images, so
 980              * overwrite it.
 981              */
 982             pstrcpy(sn->id_str, sizeof(sn->id_str), "--");
 983             bdrv_snapshot_dump(sn);
 984             monitor_printf(mon, "\n");
 985         }
 986     } else {
 987         monitor_printf(mon, "None\n");
 988     }
 989
 990     QTAILQ_FOREACH(image_entry, &image_list, next) {
 991         if (QTAILQ_EMPTY(&image_entry->snapshots)) {
 992             continue;
 993         }
 994         monitor_printf(mon,
 995                        "\nList of partial (non-loadable) snapshots on '%s':\n",
 996                        image_entry->imagename);
 997         bdrv_snapshot_dump(NULL);
 998         monitor_printf(mon, "\n");
 999         QTAILQ_FOREACH(snapshot_entry, &image_entry->snapshots, next) {
1000             bdrv_snapshot_dump(&snapshot_entry->sn);
1001             monitor_printf(mon, "\n");
1002         }
1003     }
1004
1005     QTAILQ_FOREACH_SAFE(image_entry, &image_list, next, next_ie) {
1006         SnapshotEntry *next_sn;
1007         QTAILQ_FOREACH_SAFE(snapshot_entry, &image_entry->snapshots, next,
1008                             next_sn) {
1009             g_free(snapshot_entry);
1010         }
1011         g_free(image_entry);
1012     }
1013     g_free(sn_tab);
1014     g_free(global_snapshots);
1015 }
1016
1017 void hmp_change_medium(Monitor *mon, const char *device, const char *target,
1018                        const char *arg, const char *read_only, bool force,
1019                        Error **errp)
1020 {
1021     ERRP_GUARD();
1022     BlockdevChangeReadOnlyMode read_only_mode = 0;
1023
1024     if (read_only) {
1025         read_only_mode =
1026             qapi_enum_parse(&BlockdevChangeReadOnlyMode_lookup,
1027                             read_only,
1028                             BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN, errp);
1029         if (*errp) {
1030             return;
1031         }
1032     }
1033
1034     qmp_blockdev_change_medium(device, NULL, target, arg, true, force,
1035                                !!read_only, read_only_mode, errp);
1036 }