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     bs = bdrv_find_node(id);
 148     if (bs) {
 149         qmp_blockdev_del(id, &local_err);
 150         if (local_err) {
 151             error_report_err(local_err);
 152         }
 153         return;
 154     }
 155
 156     blk = blk_by_name(id);
 157     if (!blk) {
 158         error_report("Device '%s' not found", id);
 159         return;
 160     }
 161
 162     if (!blk_legacy_dinfo(blk)) {
 163         error_report("Deleting device added with blockdev-add"
 164                      " is not supported");
 165         return;
 166     }
 167
 168     aio_context = blk_get_aio_context(blk);
 169     aio_context_acquire(aio_context);
 170
 171     bs = blk_bs(blk);
 172     if (bs) {
 173         if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
 174             error_report_err(local_err);
 175             aio_context_release(aio_context);
 176             return;
 177         }
 178
 179         blk_remove_bs(blk);
 180     }
 181
 182     /* Make the BlockBackend and the attached BlockDriverState anonymous */
 183     monitor_remove_blk(blk);
 184
 185     /*
 186      * If this BlockBackend has a device attached to it, its refcount will be
 187      * decremented when the device is removed; otherwise we have to do so here.
 188      */
 189     if (blk_get_attached_dev(blk)) {
 190         /* Further I/O must not pause the guest */
 191         blk_set_on_error(blk, BLOCKDEV_ON_ERROR_REPORT,
 192                          BLOCKDEV_ON_ERROR_REPORT);
 193     } else {
 194         blk_unref(blk);
 195     }
 196
 197     aio_context_release(aio_context);
 198 }
 199
 200 void hmp_commit(Monitor *mon, const QDict *qdict)
 201 {
 202     const char *device = qdict_get_str(qdict, "device");
 203     BlockBackend *blk;
 204     int ret;
 205
 206     if (!strcmp(device, "all")) {
 207         ret = blk_commit_all();
 208     } else {
 209         BlockDriverState *bs;
 210         AioContext *aio_context;
 211
 212         blk = blk_by_name(device);
 213         if (!blk) {
 214             error_report("Device '%s' not found", device);
 215             return;
 216         }
 217         if (!blk_is_available(blk)) {
 218             error_report("Device '%s' has no medium", device);
 219             return;
 220         }
 221
 222         bs = bdrv_skip_implicit_filters(blk_bs(blk));
 223         aio_context = bdrv_get_aio_context(bs);
 224         aio_context_acquire(aio_context);
 225
 226         ret = bdrv_commit(bs);
 227
 228         aio_context_release(aio_context);
 229     }
 230     if (ret < 0) {
 231         error_report("'commit' error for '%s': %s", device, strerror(-ret));
 232     }
 233 }
 234
 235 void hmp_drive_mirror(Monitor *mon, const QDict *qdict)
 236 {
 237     const char *filename = qdict_get_str(qdict, "target");
 238     const char *format = qdict_get_try_str(qdict, "format");
 239     bool reuse = qdict_get_try_bool(qdict, "reuse", false);
 240     bool full = qdict_get_try_bool(qdict, "full", false);
 241     Error *err = NULL;
 242     DriveMirror mirror = {
 243         .device = (char *)qdict_get_str(qdict, "device"),
 244         .target = (char *)filename,
 245         .format = (char *)format,
 246         .sync = full ? MIRROR_SYNC_MODE_FULL : MIRROR_SYNC_MODE_TOP,
 247         .has_mode = true,
 248         .mode = reuse ? NEW_IMAGE_MODE_EXISTING : NEW_IMAGE_MODE_ABSOLUTE_PATHS,
 249         .unmap = true,
 250     };
 251
 252     if (!filename) {
 253         error_setg(&err, QERR_MISSING_PARAMETER, "target");
 254         goto end;
 255     }
 256     qmp_drive_mirror(&mirror, &err);
 257 end:
 258     hmp_handle_error(mon, err);
 259 }
 260
 261 void hmp_drive_backup(Monitor *mon, const QDict *qdict)
 262 {
 263     const char *device = qdict_get_str(qdict, "device");
 264     const char *filename = qdict_get_str(qdict, "target");
 265     const char *format = qdict_get_try_str(qdict, "format");
 266     bool reuse = qdict_get_try_bool(qdict, "reuse", false);
 267     bool full = qdict_get_try_bool(qdict, "full", false);
 268     bool compress = qdict_get_try_bool(qdict, "compress", false);
 269     Error *err = NULL;
 270     DriveBackup backup = {
 271         .device = (char *)device,
 272         .target = (char *)filename,
 273         .format = (char *)format,
 274         .sync = full ? MIRROR_SYNC_MODE_FULL : MIRROR_SYNC_MODE_TOP,
 275         .has_mode = true,
 276         .mode = reuse ? NEW_IMAGE_MODE_EXISTING : NEW_IMAGE_MODE_ABSOLUTE_PATHS,
 277         .has_compress = !!compress,
 278         .compress = compress,
 279     };
 280
 281     if (!filename) {
 282         error_setg(&err, QERR_MISSING_PARAMETER, "target");
 283         goto end;
 284     }
 285
 286     qmp_drive_backup(&backup, &err);
 287 end:
 288     hmp_handle_error(mon, err);
 289 }
 290
 291 void hmp_block_job_set_speed(Monitor *mon, const QDict *qdict)
 292 {
 293     Error *error = NULL;
 294     const char *device = qdict_get_str(qdict, "device");
 295     int64_t value = qdict_get_int(qdict, "speed");
 296
 297     qmp_block_job_set_speed(device, value, &error);
 298
 299     hmp_handle_error(mon, error);
 300 }
 301
 302 void hmp_block_job_cancel(Monitor *mon, const QDict *qdict)
 303 {
 304     Error *error = NULL;
 305     const char *device = qdict_get_str(qdict, "device");
 306     bool force = qdict_get_try_bool(qdict, "force", false);
 307
 308     qmp_block_job_cancel(device, true, force, &error);
 309
 310     hmp_handle_error(mon, error);
 311 }
 312
 313 void hmp_block_job_pause(Monitor *mon, const QDict *qdict)
 314 {
 315     Error *error = NULL;
 316     const char *device = qdict_get_str(qdict, "device");
 317
 318     qmp_block_job_pause(device, &error);
 319
 320     hmp_handle_error(mon, error);
 321 }
 322
 323 void hmp_block_job_resume(Monitor *mon, const QDict *qdict)
 324 {
 325     Error *error = NULL;
 326     const char *device = qdict_get_str(qdict, "device");
 327
 328     qmp_block_job_resume(device, &error);
 329
 330     hmp_handle_error(mon, error);
 331 }
 332
 333 void hmp_block_job_complete(Monitor *mon, const QDict *qdict)
 334 {
 335     Error *error = NULL;
 336     const char *device = qdict_get_str(qdict, "device");
 337
 338     qmp_block_job_complete(device, &error);
 339
 340     hmp_handle_error(mon, error);
 341 }
 342
 343 void hmp_snapshot_blkdev(Monitor *mon, const QDict *qdict)
 344 {
 345     const char *device = qdict_get_str(qdict, "device");
 346     const char *filename = qdict_get_try_str(qdict, "snapshot-file");
 347     const char *format = qdict_get_try_str(qdict, "format");
 348     bool reuse = qdict_get_try_bool(qdict, "reuse", false);
 349     enum NewImageMode mode;
 350     Error *err = NULL;
 351
 352     if (!filename) {
 353         /*
 354          * In the future, if 'snapshot-file' is not specified, the snapshot
 355          * will be taken internally. Today it's actually required.
 356          */
 357         error_setg(&err, QERR_MISSING_PARAMETER, "snapshot-file");
 358         goto end;
 359     }
 360
 361     mode = reuse ? NEW_IMAGE_MODE_EXISTING : NEW_IMAGE_MODE_ABSOLUTE_PATHS;
 362     qmp_blockdev_snapshot_sync(device, NULL, filename, NULL, format,
 363                                true, mode, &err);
 364 end:
 365     hmp_handle_error(mon, err);
 366 }
 367
 368 void hmp_snapshot_blkdev_internal(Monitor *mon, const QDict *qdict)
 369 {
 370     const char *device = qdict_get_str(qdict, "device");
 371     const char *name = qdict_get_str(qdict, "name");
 372     Error *err = NULL;
 373
 374     qmp_blockdev_snapshot_internal_sync(device, name, &err);
 375     hmp_handle_error(mon, err);
 376 }
 377
 378 void hmp_snapshot_delete_blkdev_internal(Monitor *mon, const QDict *qdict)
 379 {
 380     const char *device = qdict_get_str(qdict, "device");
 381     const char *name = qdict_get_str(qdict, "name");
 382     const char *id = qdict_get_try_str(qdict, "id");
 383     Error *err = NULL;
 384
 385     qmp_blockdev_snapshot_delete_internal_sync(device, id, name, &err);
 386     hmp_handle_error(mon, err);
 387 }
 388
 389 void hmp_nbd_server_start(Monitor *mon, const QDict *qdict)
 390 {
 391     const char *uri = qdict_get_str(qdict, "uri");
 392     bool writable = qdict_get_try_bool(qdict, "writable", false);
 393     bool all = qdict_get_try_bool(qdict, "all", false);
 394     Error *local_err = NULL;
 395     BlockInfoList *block_list, *info;
 396     SocketAddress *addr;
 397     NbdServerAddOptions export;
 398
 399     if (writable && !all) {
 400         error_setg(&local_err, "-w only valid together with -a");
 401         goto exit;
 402     }
 403
 404     /* First check if the address is valid and start the server.  */
 405     addr = socket_parse(uri, &local_err);
 406     if (local_err != NULL) {
 407         goto exit;
 408     }
 409
 410     nbd_server_start(addr, NULL, NULL, 0, &local_err);
 411     qapi_free_SocketAddress(addr);
 412     if (local_err != NULL) {
 413         goto exit;
 414     }
 415
 416     if (!all) {
 417         return;
 418     }
 419
 420     /* Then try adding all block devices.  If one fails, close all and
 421      * exit.
 422      */
 423     block_list = qmp_query_block(NULL);
 424
 425     for (info = block_list; info; info = info->next) {
 426         if (!info->value->inserted) {
 427             continue;
 428         }
 429
 430         export = (NbdServerAddOptions) {
 431             .device         = info->value->device,
 432             .has_writable   = true,
 433             .writable       = writable,
 434         };
 435
 436         qmp_nbd_server_add(&export, &local_err);
 437
 438         if (local_err != NULL) {
 439             qmp_nbd_server_stop(NULL);
 440             break;
 441         }
 442     }
 443
 444     qapi_free_BlockInfoList(block_list);
 445
 446 exit:
 447     hmp_handle_error(mon, local_err);
 448 }
 449
 450 void hmp_nbd_server_add(Monitor *mon, const QDict *qdict)
 451 {
 452     const char *device = qdict_get_str(qdict, "device");
 453     const char *name = qdict_get_try_str(qdict, "name");
 454     bool writable = qdict_get_try_bool(qdict, "writable", false);
 455     Error *local_err = NULL;
 456
 457     NbdServerAddOptions export = {
 458         .device         = (char *) device,
 459         .name           = (char *) name,
 460         .has_writable   = true,
 461         .writable       = writable,
 462     };
 463
 464     qmp_nbd_server_add(&export, &local_err);
 465     hmp_handle_error(mon, local_err);
 466 }
 467
 468 void hmp_nbd_server_remove(Monitor *mon, const QDict *qdict)
 469 {
 470     const char *name = qdict_get_str(qdict, "name");
 471     bool force = qdict_get_try_bool(qdict, "force", false);
 472     Error *err = NULL;
 473
 474     /* Rely on BLOCK_EXPORT_REMOVE_MODE_SAFE being the default */
 475     qmp_nbd_server_remove(name, force, BLOCK_EXPORT_REMOVE_MODE_HARD, &err);
 476     hmp_handle_error(mon, err);
 477 }
 478
 479 void hmp_nbd_server_stop(Monitor *mon, const QDict *qdict)
 480 {
 481     Error *err = NULL;
 482
 483     qmp_nbd_server_stop(&err);
 484     hmp_handle_error(mon, err);
 485 }
 486
 487 void coroutine_fn hmp_block_resize(Monitor *mon, const QDict *qdict)
 488 {
 489     const char *device = qdict_get_str(qdict, "device");
 490     int64_t size = qdict_get_int(qdict, "size");
 491     Error *err = NULL;
 492
 493     qmp_block_resize(device, NULL, size, &err);
 494     hmp_handle_error(mon, err);
 495 }
 496
 497 void hmp_block_stream(Monitor *mon, const QDict *qdict)
 498 {
 499     Error *error = NULL;
 500     const char *device = qdict_get_str(qdict, "device");
 501     const char *base = qdict_get_try_str(qdict, "base");
 502     int64_t speed = qdict_get_try_int(qdict, "speed", 0);
 503
 504     qmp_block_stream(device, device, base, NULL, NULL, NULL,
 505                      qdict_haskey(qdict, "speed"), speed,
 506                      true, BLOCKDEV_ON_ERROR_REPORT, NULL,
 507                      false, false, false, false, &error);
 508
 509     hmp_handle_error(mon, error);
 510 }
 511
 512 void hmp_block_set_io_throttle(Monitor *mon, const QDict *qdict)
 513 {
 514     Error *err = NULL;
 515     char *device = (char *) qdict_get_str(qdict, "device");
 516     BlockIOThrottle throttle = {
 517         .bps = qdict_get_int(qdict, "bps"),
 518         .bps_rd = qdict_get_int(qdict, "bps_rd"),
 519         .bps_wr = qdict_get_int(qdict, "bps_wr"),
 520         .iops = qdict_get_int(qdict, "iops"),
 521         .iops_rd = qdict_get_int(qdict, "iops_rd"),
 522         .iops_wr = qdict_get_int(qdict, "iops_wr"),
 523     };
 524
 525     /*
 526      * qmp_block_set_io_throttle has separate parameters for the
 527      * (deprecated) block device name and the qdev ID but the HMP
 528      * version has only one, so we must decide which one to pass.
 529      */
 530     if (blk_by_name(device)) {
 531         throttle.device = device;
 532     } else {
 533         throttle.id = device;
 534     }
 535
 536     qmp_block_set_io_throttle(&throttle, &err);
 537     hmp_handle_error(mon, err);
 538 }
 539
 540 void hmp_eject(Monitor *mon, const QDict *qdict)
 541 {
 542     bool force = qdict_get_try_bool(qdict, "force", false);
 543     const char *device = qdict_get_str(qdict, "device");
 544     Error *err = NULL;
 545
 546     qmp_eject(device, NULL, true, force, &err);
 547     hmp_handle_error(mon, err);
 548 }
 549
 550 void hmp_qemu_io(Monitor *mon, const QDict *qdict)
 551 {
 552     BlockBackend *blk = NULL;
 553     BlockDriverState *bs = NULL;
 554     BlockBackend *local_blk = NULL;
 555     AioContext *ctx = NULL;
 556     bool qdev = qdict_get_try_bool(qdict, "qdev", false);
 557     const char *device = qdict_get_str(qdict, "device");
 558     const char *command = qdict_get_str(qdict, "command");
 559     Error *err = NULL;
 560     int ret;
 561
 562     if (qdev) {
 563         blk = blk_by_qdev_id(device, &err);
 564         if (!blk) {
 565             goto fail;
 566         }
 567     } else {
 568         blk = blk_by_name(device);
 569         if (!blk) {
 570             bs = bdrv_lookup_bs(NULL, device, &err);
 571             if (!bs) {
 572                 goto fail;
 573             }
 574         }
 575     }
 576
 577     ctx = blk ? blk_get_aio_context(blk) : bdrv_get_aio_context(bs);
 578     aio_context_acquire(ctx);
 579
 580     if (bs) {
 581         blk = local_blk = blk_new(bdrv_get_aio_context(bs), 0, BLK_PERM_ALL);
 582         ret = blk_insert_bs(blk, bs, &err);
 583         if (ret < 0) {
 584             goto fail;
 585         }
 586     }
 587
 588     /*
 589      * Notably absent: Proper permission management. This is sad, but it seems
 590      * almost impossible to achieve without changing the semantics and thereby
 591      * limiting the use cases of the qemu-io HMP command.
 592      *
 593      * In an ideal world we would unconditionally create a new BlockBackend for
 594      * qemuio_command(), but we have commands like 'reopen' and want them to
 595      * take effect on the exact BlockBackend whose name the user passed instead
 596      * of just on a temporary copy of it.
 597      *
 598      * Another problem is that deleting the temporary BlockBackend involves
 599      * draining all requests on it first, but some qemu-iotests cases want to
 600      * issue multiple aio_read/write requests and expect them to complete in
 601      * the background while the monitor has already returned.
 602      *
 603      * This is also what prevents us from saving the original permissions and
 604      * restoring them later: We can't revoke permissions until all requests
 605      * have completed, and we don't know when that is nor can we really let
 606      * anything else run before we have revoken them to avoid race conditions.
 607      *
 608      * What happens now is that command() in qemu-io-cmds.c can extend the
 609      * permissions if necessary for the qemu-io command. And they simply stay
 610      * extended, possibly resulting in a read-only guest device keeping write
 611      * permissions. Ugly, but it appears to be the lesser evil.
 612      */
 613     qemuio_command(blk, command);
 614
 615 fail:
 616     blk_unref(local_blk);
 617
 618     if (ctx) {
 619         aio_context_release(ctx);
 620     }
 621
 622     hmp_handle_error(mon, err);
 623 }
 624
 625 static void print_block_info(Monitor *mon, BlockInfo *info,
 626                              BlockDeviceInfo *inserted, bool verbose)
 627 {
 628     ImageInfo *image_info;
 629
 630     assert(!info || !info->inserted || info->inserted == inserted);
 631
 632     if (info && *info->device) {
 633         monitor_puts(mon, info->device);
 634         if (inserted && inserted->node_name) {
 635             monitor_printf(mon, " (%s)", inserted->node_name);
 636         }
 637     } else {
 638         assert(info || inserted);
 639         monitor_puts(mon,
 640                      inserted && inserted->node_name ? inserted->node_name
 641                      : info && info->qdev ? info->qdev
 642                      : "<anonymous>");
 643     }
 644
 645     if (inserted) {
 646         monitor_printf(mon, ": %s (%s%s%s)\n",
 647                        inserted->file,
 648                        inserted->drv,
 649                        inserted->ro ? ", read-only" : "",
 650                        inserted->encrypted ? ", encrypted" : "");
 651     } else {
 652         monitor_printf(mon, ": [not inserted]\n");
 653     }
 654
 655     if (info) {
 656         if (info->qdev) {
 657             monitor_printf(mon, "    Attached to:      %s\n", info->qdev);
 658         }
 659         if (info->has_io_status && info->io_status != BLOCK_DEVICE_IO_STATUS_OK) {
 660             monitor_printf(mon, "    I/O status:       %s\n",
 661                            BlockDeviceIoStatus_str(info->io_status));
 662         }
 663
 664         if (info->removable) {
 665             monitor_printf(mon, "    Removable device: %slocked, tray %s\n",
 666                            info->locked ? "" : "not ",
 667                            info->tray_open ? "open" : "closed");
 668         }
 669     }
 670
 671
 672     if (!inserted) {
 673         return;
 674     }
 675
 676     monitor_printf(mon, "    Cache mode:       %s%s%s\n",
 677                    inserted->cache->writeback ? "writeback" : "writethrough",
 678                    inserted->cache->direct ? ", direct" : "",
 679                    inserted->cache->no_flush ? ", ignore flushes" : "");
 680
 681     if (inserted->backing_file) {
 682         monitor_printf(mon,
 683                        "    Backing file:     %s "
 684                        "(chain depth: %" PRId64 ")\n",
 685                        inserted->backing_file,
 686                        inserted->backing_file_depth);
 687     }
 688
 689     if (inserted->detect_zeroes != BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF) {
 690         monitor_printf(mon, "    Detect zeroes:    %s\n",
 691                 BlockdevDetectZeroesOptions_str(inserted->detect_zeroes));
 692     }
 693
 694     if (inserted->bps  || inserted->bps_rd  || inserted->bps_wr  ||
 695         inserted->iops || inserted->iops_rd || inserted->iops_wr)
 696     {
 697         monitor_printf(mon, "    I/O throttling:   bps=%" PRId64
 698                         " bps_rd=%" PRId64  " bps_wr=%" PRId64
 699                         " bps_max=%" PRId64
 700                         " bps_rd_max=%" PRId64
 701                         " bps_wr_max=%" PRId64
 702                         " iops=%" PRId64 " iops_rd=%" PRId64
 703                         " iops_wr=%" PRId64
 704                         " iops_max=%" PRId64
 705                         " iops_rd_max=%" PRId64
 706                         " iops_wr_max=%" PRId64
 707                         " iops_size=%" PRId64
 708                         " group=%s\n",
 709                         inserted->bps,
 710                         inserted->bps_rd,
 711                         inserted->bps_wr,
 712                         inserted->bps_max,
 713                         inserted->bps_rd_max,
 714                         inserted->bps_wr_max,
 715                         inserted->iops,
 716                         inserted->iops_rd,
 717                         inserted->iops_wr,
 718                         inserted->iops_max,
 719                         inserted->iops_rd_max,
 720                         inserted->iops_wr_max,
 721                         inserted->iops_size,
 722                         inserted->group);
 723     }
 724
 725     if (verbose) {
 726         monitor_printf(mon, "\nImages:\n");
 727         image_info = inserted->image;
 728         while (1) {
 729             bdrv_node_info_dump(qapi_ImageInfo_base(image_info), 0, false);
 730             if (image_info->backing_image) {
 731                 image_info = image_info->backing_image;
 732             } else {
 733                 break;
 734             }
 735         }
 736     }
 737 }
 738
 739 void hmp_info_block(Monitor *mon, const QDict *qdict)
 740 {
 741     BlockInfoList *block_list, *info;
 742     BlockDeviceInfoList *blockdev_list, *blockdev;
 743     const char *device = qdict_get_try_str(qdict, "device");
 744     bool verbose = qdict_get_try_bool(qdict, "verbose", false);
 745     bool nodes = qdict_get_try_bool(qdict, "nodes", false);
 746     bool printed = false;
 747
 748     /* Print BlockBackend information */
 749     if (!nodes) {
 750         block_list = qmp_query_block(NULL);
 751     } else {
 752         block_list = NULL;
 753     }
 754
 755     for (info = block_list; info; info = info->next) {
 756         if (device && strcmp(device, info->value->device)) {
 757             continue;
 758         }
 759
 760         if (info != block_list) {
 761             monitor_printf(mon, "\n");
 762         }
 763
 764         print_block_info(mon, info->value, info->value->inserted,
 765                          verbose);
 766         printed = true;
 767     }
 768
 769     qapi_free_BlockInfoList(block_list);
 770
 771     if ((!device && !nodes) || printed) {
 772         return;
 773     }
 774
 775     /* Print node information */
 776     blockdev_list = qmp_query_named_block_nodes(false, false, NULL);
 777     for (blockdev = blockdev_list; blockdev; blockdev = blockdev->next) {
 778         assert(blockdev->value->node_name);
 779         if (device && strcmp(device, blockdev->value->node_name)) {
 780             continue;
 781         }
 782
 783         if (blockdev != blockdev_list) {
 784             monitor_printf(mon, "\n");
 785         }
 786
 787         print_block_info(mon, NULL, blockdev->value, verbose);
 788     }
 789     qapi_free_BlockDeviceInfoList(blockdev_list);
 790 }
 791
 792 void hmp_info_blockstats(Monitor *mon, const QDict *qdict)
 793 {
 794     BlockStatsList *stats_list, *stats;
 795
 796     stats_list = qmp_query_blockstats(false, false, NULL);
 797
 798     for (stats = stats_list; stats; stats = stats->next) {
 799         if (!stats->value->device) {
 800             continue;
 801         }
 802
 803         monitor_printf(mon, "%s:", stats->value->device);
 804         monitor_printf(mon, " rd_bytes=%" PRId64
 805                        " wr_bytes=%" PRId64
 806                        " rd_operations=%" PRId64
 807                        " wr_operations=%" PRId64
 808                        " flush_operations=%" PRId64
 809                        " wr_total_time_ns=%" PRId64
 810                        " rd_total_time_ns=%" PRId64
 811                        " flush_total_time_ns=%" PRId64
 812                        " rd_merged=%" PRId64
 813                        " wr_merged=%" PRId64
 814                        " idle_time_ns=%" PRId64
 815                        "\n",
 816                        stats->value->stats->rd_bytes,
 817                        stats->value->stats->wr_bytes,
 818                        stats->value->stats->rd_operations,
 819                        stats->value->stats->wr_operations,
 820                        stats->value->stats->flush_operations,
 821                        stats->value->stats->wr_total_time_ns,
 822                        stats->value->stats->rd_total_time_ns,
 823                        stats->value->stats->flush_total_time_ns,
 824                        stats->value->stats->rd_merged,
 825                        stats->value->stats->wr_merged,
 826                        stats->value->stats->idle_time_ns);
 827     }
 828
 829     qapi_free_BlockStatsList(stats_list);
 830 }
 831
 832 void hmp_info_block_jobs(Monitor *mon, const QDict *qdict)
 833 {
 834     BlockJobInfoList *list;
 835
 836     list = qmp_query_block_jobs(&error_abort);
 837
 838     if (!list) {
 839         monitor_printf(mon, "No active jobs\n");
 840         return;
 841     }
 842
 843     while (list) {
 844         if (strcmp(list->value->type, "stream") == 0) {
 845             monitor_printf(mon, "Streaming device %s: Completed %" PRId64
 846                            " of %" PRId64 " bytes, speed limit %" PRId64
 847                            " bytes/s\n",
 848                            list->value->device,
 849                            list->value->offset,
 850                            list->value->len,
 851                            list->value->speed);
 852         } else {
 853             monitor_printf(mon, "Type %s, device %s: Completed %" PRId64
 854                            " of %" PRId64 " bytes, speed limit %" PRId64
 855                            " bytes/s\n",
 856                            list->value->type,
 857                            list->value->device,
 858                            list->value->offset,
 859                            list->value->len,
 860                            list->value->speed);
 861         }
 862         list = list->next;
 863     }
 864
 865     qapi_free_BlockJobInfoList(list);
 866 }
 867
 868 void hmp_info_snapshots(Monitor *mon, const QDict *qdict)
 869 {
 870     BlockDriverState *bs, *bs1;
 871     BdrvNextIterator it1;
 872     QEMUSnapshotInfo *sn_tab, *sn;
 873     bool no_snapshot = true;
 874     int nb_sns, i;
 875     int total;
 876     int *global_snapshots;
 877     AioContext *aio_context;
 878
 879     typedef struct SnapshotEntry {
 880         QEMUSnapshotInfo sn;
 881         QTAILQ_ENTRY(SnapshotEntry) next;
 882     } SnapshotEntry;
 883
 884     typedef struct ImageEntry {
 885         const char *imagename;
 886         QTAILQ_ENTRY(ImageEntry) next;
 887         QTAILQ_HEAD(, SnapshotEntry) snapshots;
 888     } ImageEntry;
 889
 890     QTAILQ_HEAD(, ImageEntry) image_list =
 891         QTAILQ_HEAD_INITIALIZER(image_list);
 892
 893     ImageEntry *image_entry, *next_ie;
 894     SnapshotEntry *snapshot_entry;
 895     Error *err = NULL;
 896
 897     bs = bdrv_all_find_vmstate_bs(NULL, false, NULL, &err);
 898     if (!bs) {
 899         error_report_err(err);
 900         return;
 901     }
 902     aio_context = bdrv_get_aio_context(bs);
 903
 904     aio_context_acquire(aio_context);
 905     nb_sns = bdrv_snapshot_list(bs, &sn_tab);
 906     aio_context_release(aio_context);
 907
 908     if (nb_sns < 0) {
 909         monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
 910         return;
 911     }
 912
 913     for (bs1 = bdrv_first(&it1); bs1; bs1 = bdrv_next(&it1)) {
 914         int bs1_nb_sns = 0;
 915         ImageEntry *ie;
 916         SnapshotEntry *se;
 917         AioContext *ctx = bdrv_get_aio_context(bs1);
 918
 919         aio_context_acquire(ctx);
 920         if (bdrv_can_snapshot(bs1)) {
 921             sn = NULL;
 922             bs1_nb_sns = bdrv_snapshot_list(bs1, &sn);
 923             if (bs1_nb_sns > 0) {
 924                 no_snapshot = false;
 925                 ie = g_new0(ImageEntry, 1);
 926                 ie->imagename = bdrv_get_device_name(bs1);
 927                 QTAILQ_INIT(&ie->snapshots);
 928                 QTAILQ_INSERT_TAIL(&image_list, ie, next);
 929                 for (i = 0; i < bs1_nb_sns; i++) {
 930                     se = g_new0(SnapshotEntry, 1);
 931                     se->sn = sn[i];
 932                     QTAILQ_INSERT_TAIL(&ie->snapshots, se, next);
 933                 }
 934             }
 935             g_free(sn);
 936         }
 937         aio_context_release(ctx);
 938     }
 939
 940     if (no_snapshot) {
 941         monitor_printf(mon, "There is no snapshot available.\n");
 942         return;
 943     }
 944
 945     global_snapshots = g_new0(int, nb_sns);
 946     total = 0;
 947     for (i = 0; i < nb_sns; i++) {
 948         SnapshotEntry *next_sn;
 949         if (bdrv_all_has_snapshot(sn_tab[i].name, false, NULL, NULL) == 1) {
 950             global_snapshots[total] = i;
 951             total++;
 952             QTAILQ_FOREACH(image_entry, &image_list, next) {
 953                 QTAILQ_FOREACH_SAFE(snapshot_entry, &image_entry->snapshots,
 954                                     next, next_sn) {
 955                     if (!strcmp(sn_tab[i].name, snapshot_entry->sn.name)) {
 956                         QTAILQ_REMOVE(&image_entry->snapshots, snapshot_entry,
 957                                       next);
 958                         g_free(snapshot_entry);
 959                     }
 960                 }
 961             }
 962         }
 963     }
 964     monitor_printf(mon, "List of snapshots present on all disks:\n");
 965
 966     if (total > 0) {
 967         bdrv_snapshot_dump(NULL);
 968         monitor_printf(mon, "\n");
 969         for (i = 0; i < total; i++) {
 970             sn = &sn_tab[global_snapshots[i]];
 971             /*
 972              * The ID is not guaranteed to be the same on all images, so
 973              * overwrite it.
 974              */
 975             pstrcpy(sn->id_str, sizeof(sn->id_str), "--");
 976             bdrv_snapshot_dump(sn);
 977             monitor_printf(mon, "\n");
 978         }
 979     } else {
 980         monitor_printf(mon, "None\n");
 981     }
 982
 983     QTAILQ_FOREACH(image_entry, &image_list, next) {
 984         if (QTAILQ_EMPTY(&image_entry->snapshots)) {
 985             continue;
 986         }
 987         monitor_printf(mon,
 988                        "\nList of partial (non-loadable) snapshots on '%s':\n",
 989                        image_entry->imagename);
 990         bdrv_snapshot_dump(NULL);
 991         monitor_printf(mon, "\n");
 992         QTAILQ_FOREACH(snapshot_entry, &image_entry->snapshots, next) {
 993             bdrv_snapshot_dump(&snapshot_entry->sn);
 994             monitor_printf(mon, "\n");
 995         }
 996     }
 997
 998     QTAILQ_FOREACH_SAFE(image_entry, &image_list, next, next_ie) {
 999         SnapshotEntry *next_sn;
1000         QTAILQ_FOREACH_SAFE(snapshot_entry, &image_entry->snapshots, next,
1001                             next_sn) {
1002             g_free(snapshot_entry);
1003         }
1004         g_free(image_entry);
1005     }
1006     g_free(sn_tab);
1007     g_free(global_snapshots);
1008 }
1009
1010 void hmp_change_medium(Monitor *mon, const char *device, const char *target,
1011                        const char *arg, const char *read_only, bool force,
1012                        Error **errp)
1013 {
1014     ERRP_GUARD();
1015     BlockdevChangeReadOnlyMode read_only_mode = 0;
1016
1017     if (read_only) {
1018         read_only_mode =
1019             qapi_enum_parse(&BlockdevChangeReadOnlyMode_lookup,
1020                             read_only,
1021                             BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN, errp);
1022         if (*errp) {
1023             return;
1024         }
1025     }
1026
1027     qmp_blockdev_change_medium(device, NULL, target, arg, true, force,
1028                                !!read_only, read_only_mode, errp);
1029 }