block/qapi.c

   1 /*
   2  * Block layer qmp and info dump related functions
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include "qemu/osdep.h"
  26 #include "qemu/cutils.h"
  27 #include "block/qapi.h"
  28 #include "block/block_int.h"
  29 #include "block/throttle-groups.h"
  30 #include "block/write-threshold.h"
  31 #include "qapi/error.h"
  32 #include "qapi/qapi-commands-block-core.h"
  33 #include "qapi/qobject-output-visitor.h"
  34 #include "qapi/qapi-visit-block-core.h"
  35 #include "qapi/qmp/qbool.h"
  36 #include "qapi/qmp/qdict.h"
  37 #include "qapi/qmp/qlist.h"
  38 #include "qapi/qmp/qnum.h"
  39 #include "qapi/qmp/qstring.h"
  40 #include "qemu/qemu-print.h"
  41 #include "sysemu/block-backend.h"
  42 #include "qemu/cutils.h"
  43
  44 BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
  45                                         BlockDriverState *bs,
  46                                         bool flat,
  47                                         Error **errp)
  48 {
  49     ImageInfo **p_image_info;
  50     BlockDriverState *bs0, *backing;
  51     BlockDeviceInfo *info;
  52
  53     if (!bs->drv) {
  54         error_setg(errp, "Block device %s is ejected", bs->node_name);
  55         return NULL;
  56     }
  57
  58     bdrv_refresh_filename(bs);
  59
  60     info = g_malloc0(sizeof(*info));
  61     info->file                   = g_strdup(bs->filename);
  62     info->ro                     = bs->read_only;
  63     info->drv                    = g_strdup(bs->drv->format_name);
  64     info->encrypted              = bs->encrypted;
  65
  66     info->cache = g_new(BlockdevCacheInfo, 1);
  67     *info->cache = (BlockdevCacheInfo) {
  68         .writeback      = blk ? blk_enable_write_cache(blk) : true,
  69         .direct         = !!(bs->open_flags & BDRV_O_NOCACHE),
  70         .no_flush       = !!(bs->open_flags & BDRV_O_NO_FLUSH),
  71     };
  72
  73     if (bs->node_name[0]) {
  74         info->has_node_name = true;
  75         info->node_name = g_strdup(bs->node_name);
  76     }
  77
  78     backing = bdrv_cow_bs(bs);
  79     if (backing) {
  80         info->has_backing_file = true;
  81         info->backing_file = g_strdup(backing->filename);
  82     }
  83
  84     if (!QLIST_EMPTY(&bs->dirty_bitmaps)) {
  85         info->has_dirty_bitmaps = true;
  86         info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
  87     }
  88
  89     info->detect_zeroes = bs->detect_zeroes;
  90
  91     if (blk && blk_get_public(blk)->throttle_group_member.throttle_state) {
  92         ThrottleConfig cfg;
  93         BlockBackendPublic *blkp = blk_get_public(blk);
  94
  95         throttle_group_get_config(&blkp->throttle_group_member, &cfg);
  96
  97         info->bps     = cfg.buckets[THROTTLE_BPS_TOTAL].avg;
  98         info->bps_rd  = cfg.buckets[THROTTLE_BPS_READ].avg;
  99         info->bps_wr  = cfg.buckets[THROTTLE_BPS_WRITE].avg;
 100
 101         info->iops    = cfg.buckets[THROTTLE_OPS_TOTAL].avg;
 102         info->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg;
 103         info->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg;
 104
 105         info->has_bps_max     = cfg.buckets[THROTTLE_BPS_TOTAL].max;
 106         info->bps_max         = cfg.buckets[THROTTLE_BPS_TOTAL].max;
 107         info->has_bps_rd_max  = cfg.buckets[THROTTLE_BPS_READ].max;
 108         info->bps_rd_max      = cfg.buckets[THROTTLE_BPS_READ].max;
 109         info->has_bps_wr_max  = cfg.buckets[THROTTLE_BPS_WRITE].max;
 110         info->bps_wr_max      = cfg.buckets[THROTTLE_BPS_WRITE].max;
 111
 112         info->has_iops_max    = cfg.buckets[THROTTLE_OPS_TOTAL].max;
 113         info->iops_max        = cfg.buckets[THROTTLE_OPS_TOTAL].max;
 114         info->has_iops_rd_max = cfg.buckets[THROTTLE_OPS_READ].max;
 115         info->iops_rd_max     = cfg.buckets[THROTTLE_OPS_READ].max;
 116         info->has_iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max;
 117         info->iops_wr_max     = cfg.buckets[THROTTLE_OPS_WRITE].max;
 118
 119         info->has_bps_max_length     = info->has_bps_max;
 120         info->bps_max_length         =
 121             cfg.buckets[THROTTLE_BPS_TOTAL].burst_length;
 122         info->has_bps_rd_max_length  = info->has_bps_rd_max;
 123         info->bps_rd_max_length      =
 124             cfg.buckets[THROTTLE_BPS_READ].burst_length;
 125         info->has_bps_wr_max_length  = info->has_bps_wr_max;
 126         info->bps_wr_max_length      =
 127             cfg.buckets[THROTTLE_BPS_WRITE].burst_length;
 128
 129         info->has_iops_max_length    = info->has_iops_max;
 130         info->iops_max_length        =
 131             cfg.buckets[THROTTLE_OPS_TOTAL].burst_length;
 132         info->has_iops_rd_max_length = info->has_iops_rd_max;
 133         info->iops_rd_max_length     =
 134             cfg.buckets[THROTTLE_OPS_READ].burst_length;
 135         info->has_iops_wr_max_length = info->has_iops_wr_max;
 136         info->iops_wr_max_length     =
 137             cfg.buckets[THROTTLE_OPS_WRITE].burst_length;
 138
 139         info->has_iops_size = cfg.op_size;
 140         info->iops_size = cfg.op_size;
 141
 142         info->has_group = true;
 143         info->group =
 144             g_strdup(throttle_group_get_name(&blkp->throttle_group_member));
 145     }
 146
 147     info->write_threshold = bdrv_write_threshold_get(bs);
 148
 149     bs0 = bs;
 150     p_image_info = &info->image;
 151     info->backing_file_depth = 0;
 152     while (1) {
 153         Error *local_err = NULL;
 154         bdrv_query_image_info(bs0, p_image_info, &local_err);
 155         if (local_err) {
 156             error_propagate(errp, local_err);
 157             qapi_free_BlockDeviceInfo(info);
 158             return NULL;
 159         }
 160
 161         /* stop gathering data for flat output */
 162         if (flat) {
 163             break;
 164         }
 165
 166         if (bs0->drv && bdrv_filter_or_cow_child(bs0)) {
 167             /*
 168              * Put any filtered child here (for backwards compatibility to when
 169              * we put bs0->backing here, which might be any filtered child).
 170              */
 171             info->backing_file_depth++;
 172             bs0 = bdrv_filter_or_cow_bs(bs0);
 173             (*p_image_info)->has_backing_image = true;
 174             p_image_info = &((*p_image_info)->backing_image);
 175         } else {
 176             break;
 177         }
 178
 179         /* Skip automatically inserted nodes that the user isn't aware of for
 180          * query-block (blk != NULL), but not for query-named-block-nodes */
 181         if (blk) {
 182             bs0 = bdrv_skip_implicit_filters(bs0);
 183         }
 184     }
 185
 186     return info;
 187 }
 188
 189 /*
 190  * Returns 0 on success, with *p_list either set to describe snapshot
 191  * information, or NULL because there are no snapshots.  Returns -errno on
 192  * error, with *p_list untouched.
 193  */
 194 int bdrv_query_snapshot_info_list(BlockDriverState *bs,
 195                                   SnapshotInfoList **p_list,
 196                                   Error **errp)
 197 {
 198     int i, sn_count;
 199     QEMUSnapshotInfo *sn_tab = NULL;
 200     SnapshotInfoList *head = NULL, **tail = &head;
 201     SnapshotInfo *info;
 202
 203     sn_count = bdrv_snapshot_list(bs, &sn_tab);
 204     if (sn_count < 0) {
 205         const char *dev = bdrv_get_device_name(bs);
 206         switch (sn_count) {
 207         case -ENOMEDIUM:
 208             error_setg(errp, "Device '%s' is not inserted", dev);
 209             break;
 210         case -ENOTSUP:
 211             error_setg(errp,
 212                        "Device '%s' does not support internal snapshots",
 213                        dev);
 214             break;
 215         default:
 216             error_setg_errno(errp, -sn_count,
 217                              "Can't list snapshots of device '%s'", dev);
 218             break;
 219         }
 220         return sn_count;
 221     }
 222
 223     for (i = 0; i < sn_count; i++) {
 224         info = g_new0(SnapshotInfo, 1);
 225         info->id            = g_strdup(sn_tab[i].id_str);
 226         info->name          = g_strdup(sn_tab[i].name);
 227         info->vm_state_size = sn_tab[i].vm_state_size;
 228         info->date_sec      = sn_tab[i].date_sec;
 229         info->date_nsec     = sn_tab[i].date_nsec;
 230         info->vm_clock_sec  = sn_tab[i].vm_clock_nsec / 1000000000;
 231         info->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
 232         info->icount        = sn_tab[i].icount;
 233         info->has_icount    = sn_tab[i].icount != -1ULL;
 234
 235         QAPI_LIST_APPEND(tail, info);
 236     }
 237
 238     g_free(sn_tab);
 239     *p_list = head;
 240     return 0;
 241 }
 242
 243 /**
 244  * bdrv_query_image_info:
 245  * @bs: block device to examine
 246  * @p_info: location to store image information
 247  * @errp: location to store error information
 248  *
 249  * Store "flat" image information in @p_info.
 250  *
 251  * "Flat" means it does *not* query backing image information,
 252  * i.e. (*pinfo)->has_backing_image will be set to false and
 253  * (*pinfo)->backing_image to NULL even when the image does in fact have
 254  * a backing image.
 255  *
 256  * @p_info will be set only on success. On error, store error in @errp.
 257  */
 258 void bdrv_query_image_info(BlockDriverState *bs,
 259                            ImageInfo **p_info,
 260                            Error **errp)
 261 {
 262     int64_t size;
 263     const char *backing_filename;
 264     BlockDriverInfo bdi;
 265     int ret;
 266     Error *err = NULL;
 267     ImageInfo *info;
 268
 269     aio_context_acquire(bdrv_get_aio_context(bs));
 270
 271     size = bdrv_getlength(bs);
 272     if (size < 0) {
 273         error_setg_errno(errp, -size, "Can't get image size '%s'",
 274                          bs->exact_filename);
 275         goto out;
 276     }
 277
 278     bdrv_refresh_filename(bs);
 279
 280     info = g_new0(ImageInfo, 1);
 281     info->filename        = g_strdup(bs->filename);
 282     info->format          = g_strdup(bdrv_get_format_name(bs));
 283     info->virtual_size    = size;
 284     info->actual_size     = bdrv_get_allocated_file_size(bs);
 285     info->has_actual_size = info->actual_size >= 0;
 286     if (bs->encrypted) {
 287         info->encrypted = true;
 288         info->has_encrypted = true;
 289     }
 290     if (bdrv_get_info(bs, &bdi) >= 0) {
 291         if (bdi.cluster_size != 0) {
 292             info->cluster_size = bdi.cluster_size;
 293             info->has_cluster_size = true;
 294         }
 295         info->dirty_flag = bdi.is_dirty;
 296         info->has_dirty_flag = true;
 297     }
 298     info->format_specific = bdrv_get_specific_info(bs, &err);
 299     if (err) {
 300         error_propagate(errp, err);
 301         qapi_free_ImageInfo(info);
 302         goto out;
 303     }
 304     info->has_format_specific = info->format_specific != NULL;
 305
 306     backing_filename = bs->backing_file;
 307     if (backing_filename[0] != '\0') {
 308         char *backing_filename2;
 309
 310         info->backing_filename = g_strdup(backing_filename);
 311         info->has_backing_filename = true;
 312         backing_filename2 = bdrv_get_full_backing_filename(bs, NULL);
 313
 314         /* Always report the full_backing_filename if present, even if it's the
 315          * same as backing_filename. That they are same is useful info. */
 316         if (backing_filename2) {
 317             info->full_backing_filename = g_strdup(backing_filename2);
 318             info->has_full_backing_filename = true;
 319         }
 320
 321         if (bs->backing_format[0]) {
 322             info->backing_filename_format = g_strdup(bs->backing_format);
 323             info->has_backing_filename_format = true;
 324         }
 325         g_free(backing_filename2);
 326     }
 327
 328     ret = bdrv_query_snapshot_info_list(bs, &info->snapshots, &err);
 329     switch (ret) {
 330     case 0:
 331         if (info->snapshots) {
 332             info->has_snapshots = true;
 333         }
 334         break;
 335     /* recoverable error */
 336     case -ENOMEDIUM:
 337     case -ENOTSUP:
 338         error_free(err);
 339         break;
 340     default:
 341         error_propagate(errp, err);
 342         qapi_free_ImageInfo(info);
 343         goto out;
 344     }
 345
 346     *p_info = info;
 347
 348 out:
 349     aio_context_release(bdrv_get_aio_context(bs));
 350 }
 351
 352 /* @p_info will be set only on success. */
 353 static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
 354                             Error **errp)
 355 {
 356     BlockInfo *info = g_malloc0(sizeof(*info));
 357     BlockDriverState *bs = blk_bs(blk);
 358     char *qdev;
 359
 360     /* Skip automatically inserted nodes that the user isn't aware of */
 361     bs = bdrv_skip_implicit_filters(bs);
 362
 363     info->device = g_strdup(blk_name(blk));
 364     info->type = g_strdup("unknown");
 365     info->locked = blk_dev_is_medium_locked(blk);
 366     info->removable = blk_dev_has_removable_media(blk);
 367
 368     qdev = blk_get_attached_dev_id(blk);
 369     if (qdev && *qdev) {
 370         info->has_qdev = true;
 371         info->qdev = qdev;
 372     } else {
 373         g_free(qdev);
 374     }
 375
 376     if (blk_dev_has_tray(blk)) {
 377         info->has_tray_open = true;
 378         info->tray_open = blk_dev_is_tray_open(blk);
 379     }
 380
 381     if (blk_iostatus_is_enabled(blk)) {
 382         info->has_io_status = true;
 383         info->io_status = blk_iostatus(blk);
 384     }
 385
 386     if (bs && !QLIST_EMPTY(&bs->dirty_bitmaps)) {
 387         info->has_dirty_bitmaps = true;
 388         info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
 389     }
 390
 391     if (bs && bs->drv) {
 392         info->has_inserted = true;
 393         info->inserted = bdrv_block_device_info(blk, bs, false, errp);
 394         if (info->inserted == NULL) {
 395             goto err;
 396         }
 397     }
 398
 399     *p_info = info;
 400     return;
 401
 402  err:
 403     qapi_free_BlockInfo(info);
 404 }
 405
 406 static uint64List *uint64_list(uint64_t *list, int size)
 407 {
 408     int i;
 409     uint64List *out_list = NULL;
 410     uint64List **tail = &out_list;
 411
 412     for (i = 0; i < size; i++) {
 413         QAPI_LIST_APPEND(tail, list[i]);
 414     }
 415
 416     return out_list;
 417 }
 418
 419 static void bdrv_latency_histogram_stats(BlockLatencyHistogram *hist,
 420                                          bool *not_null,
 421                                          BlockLatencyHistogramInfo **info)
 422 {
 423     *not_null = hist->bins != NULL;
 424     if (*not_null) {
 425         *info = g_new0(BlockLatencyHistogramInfo, 1);
 426
 427         (*info)->boundaries = uint64_list(hist->boundaries, hist->nbins - 1);
 428         (*info)->bins = uint64_list(hist->bins, hist->nbins);
 429     }
 430 }
 431
 432 static void bdrv_query_blk_stats(BlockDeviceStats *ds, BlockBackend *blk)
 433 {
 434     BlockAcctStats *stats = blk_get_stats(blk);
 435     BlockAcctTimedStats *ts = NULL;
 436
 437     ds->rd_bytes = stats->nr_bytes[BLOCK_ACCT_READ];
 438     ds->wr_bytes = stats->nr_bytes[BLOCK_ACCT_WRITE];
 439     ds->unmap_bytes = stats->nr_bytes[BLOCK_ACCT_UNMAP];
 440     ds->rd_operations = stats->nr_ops[BLOCK_ACCT_READ];
 441     ds->wr_operations = stats->nr_ops[BLOCK_ACCT_WRITE];
 442     ds->unmap_operations = stats->nr_ops[BLOCK_ACCT_UNMAP];
 443
 444     ds->failed_rd_operations = stats->failed_ops[BLOCK_ACCT_READ];
 445     ds->failed_wr_operations = stats->failed_ops[BLOCK_ACCT_WRITE];
 446     ds->failed_flush_operations = stats->failed_ops[BLOCK_ACCT_FLUSH];
 447     ds->failed_unmap_operations = stats->failed_ops[BLOCK_ACCT_UNMAP];
 448
 449     ds->invalid_rd_operations = stats->invalid_ops[BLOCK_ACCT_READ];
 450     ds->invalid_wr_operations = stats->invalid_ops[BLOCK_ACCT_WRITE];
 451     ds->invalid_flush_operations =
 452         stats->invalid_ops[BLOCK_ACCT_FLUSH];
 453     ds->invalid_unmap_operations = stats->invalid_ops[BLOCK_ACCT_UNMAP];
 454
 455     ds->rd_merged = stats->merged[BLOCK_ACCT_READ];
 456     ds->wr_merged = stats->merged[BLOCK_ACCT_WRITE];
 457     ds->unmap_merged = stats->merged[BLOCK_ACCT_UNMAP];
 458     ds->flush_operations = stats->nr_ops[BLOCK_ACCT_FLUSH];
 459     ds->wr_total_time_ns = stats->total_time_ns[BLOCK_ACCT_WRITE];
 460     ds->rd_total_time_ns = stats->total_time_ns[BLOCK_ACCT_READ];
 461     ds->flush_total_time_ns = stats->total_time_ns[BLOCK_ACCT_FLUSH];
 462     ds->unmap_total_time_ns = stats->total_time_ns[BLOCK_ACCT_UNMAP];
 463
 464     ds->has_idle_time_ns = stats->last_access_time_ns > 0;
 465     if (ds->has_idle_time_ns) {
 466         ds->idle_time_ns = block_acct_idle_time_ns(stats);
 467     }
 468
 469     ds->account_invalid = stats->account_invalid;
 470     ds->account_failed = stats->account_failed;
 471
 472     while ((ts = block_acct_interval_next(stats, ts))) {
 473         BlockDeviceTimedStats *dev_stats = g_malloc0(sizeof(*dev_stats));
 474
 475         TimedAverage *rd = &ts->latency[BLOCK_ACCT_READ];
 476         TimedAverage *wr = &ts->latency[BLOCK_ACCT_WRITE];
 477         TimedAverage *fl = &ts->latency[BLOCK_ACCT_FLUSH];
 478
 479         dev_stats->interval_length = ts->interval_length;
 480
 481         dev_stats->min_rd_latency_ns = timed_average_min(rd);
 482         dev_stats->max_rd_latency_ns = timed_average_max(rd);
 483         dev_stats->avg_rd_latency_ns = timed_average_avg(rd);
 484
 485         dev_stats->min_wr_latency_ns = timed_average_min(wr);
 486         dev_stats->max_wr_latency_ns = timed_average_max(wr);
 487         dev_stats->avg_wr_latency_ns = timed_average_avg(wr);
 488
 489         dev_stats->min_flush_latency_ns = timed_average_min(fl);
 490         dev_stats->max_flush_latency_ns = timed_average_max(fl);
 491         dev_stats->avg_flush_latency_ns = timed_average_avg(fl);
 492
 493         dev_stats->avg_rd_queue_depth =
 494             block_acct_queue_depth(ts, BLOCK_ACCT_READ);
 495         dev_stats->avg_wr_queue_depth =
 496             block_acct_queue_depth(ts, BLOCK_ACCT_WRITE);
 497
 498         QAPI_LIST_PREPEND(ds->timed_stats, dev_stats);
 499     }
 500
 501     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_READ],
 502                                  &ds->has_rd_latency_histogram,
 503                                  &ds->rd_latency_histogram);
 504     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_WRITE],
 505                                  &ds->has_wr_latency_histogram,
 506                                  &ds->wr_latency_histogram);
 507     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_FLUSH],
 508                                  &ds->has_flush_latency_histogram,
 509                                  &ds->flush_latency_histogram);
 510 }
 511
 512 static BlockStats *bdrv_query_bds_stats(BlockDriverState *bs,
 513                                         bool blk_level)
 514 {
 515     BdrvChild *parent_child;
 516     BlockDriverState *filter_or_cow_bs;
 517     BlockStats *s = NULL;
 518
 519     s = g_malloc0(sizeof(*s));
 520     s->stats = g_malloc0(sizeof(*s->stats));
 521
 522     if (!bs) {
 523         return s;
 524     }
 525
 526     /* Skip automatically inserted nodes that the user isn't aware of in
 527      * a BlockBackend-level command. Stay at the exact node for a node-level
 528      * command. */
 529     if (blk_level) {
 530         bs = bdrv_skip_implicit_filters(bs);
 531     }
 532
 533     if (bdrv_get_node_name(bs)[0]) {
 534         s->has_node_name = true;
 535         s->node_name = g_strdup(bdrv_get_node_name(bs));
 536     }
 537
 538     s->stats->wr_highest_offset = stat64_get(&bs->wr_highest_offset);
 539
 540     s->driver_specific = bdrv_get_specific_stats(bs);
 541     if (s->driver_specific) {
 542         s->has_driver_specific = true;
 543     }
 544
 545     parent_child = bdrv_primary_child(bs);
 546     if (!parent_child ||
 547         !(parent_child->role & (BDRV_CHILD_DATA | BDRV_CHILD_FILTERED)))
 548     {
 549         BdrvChild *c;
 550
 551         /*
 552          * Look for a unique data-storing child.  We do not need to look for
 553          * filtered children, as there would be only one and it would have been
 554          * the primary child.
 555          */
 556         parent_child = NULL;
 557         QLIST_FOREACH(c, &bs->children, next) {
 558             if (c->role & BDRV_CHILD_DATA) {
 559                 if (parent_child) {
 560                     /*
 561                      * There are multiple data-storing children and we cannot
 562                      * choose between them.
 563                      */
 564                     parent_child = NULL;
 565                     break;
 566                 }
 567                 parent_child = c;
 568             }
 569         }
 570     }
 571     if (parent_child) {
 572         s->has_parent = true;
 573         s->parent = bdrv_query_bds_stats(parent_child->bs, blk_level);
 574     }
 575
 576     filter_or_cow_bs = bdrv_filter_or_cow_bs(bs);
 577     if (blk_level && filter_or_cow_bs) {
 578         /*
 579          * Put any filtered or COW child here (for backwards
 580          * compatibility to when we put bs0->backing here, which might
 581          * be either)
 582          */
 583         s->has_backing = true;
 584         s->backing = bdrv_query_bds_stats(filter_or_cow_bs, blk_level);
 585     }
 586
 587     return s;
 588 }
 589
 590 BlockInfoList *qmp_query_block(Error **errp)
 591 {
 592     BlockInfoList *head = NULL, **p_next = &head;
 593     BlockBackend *blk;
 594     Error *local_err = NULL;
 595
 596     for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
 597         BlockInfoList *info;
 598
 599         if (!*blk_name(blk) && !blk_get_attached_dev(blk)) {
 600             continue;
 601         }
 602
 603         info = g_malloc0(sizeof(*info));
 604         bdrv_query_info(blk, &info->value, &local_err);
 605         if (local_err) {
 606             error_propagate(errp, local_err);
 607             g_free(info);
 608             qapi_free_BlockInfoList(head);
 609             return NULL;
 610         }
 611
 612         *p_next = info;
 613         p_next = &info->next;
 614     }
 615
 616     return head;
 617 }
 618
 619 BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
 620                                      bool query_nodes,
 621                                      Error **errp)
 622 {
 623     BlockStatsList *head = NULL, **tail = &head;
 624     BlockBackend *blk;
 625     BlockDriverState *bs;
 626
 627     /* Just to be safe if query_nodes is not always initialized */
 628     if (has_query_nodes && query_nodes) {
 629         for (bs = bdrv_next_node(NULL); bs; bs = bdrv_next_node(bs)) {
 630             AioContext *ctx = bdrv_get_aio_context(bs);
 631
 632             aio_context_acquire(ctx);
 633             QAPI_LIST_APPEND(tail, bdrv_query_bds_stats(bs, false));
 634             aio_context_release(ctx);
 635         }
 636     } else {
 637         for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
 638             AioContext *ctx = blk_get_aio_context(blk);
 639             BlockStats *s;
 640             char *qdev;
 641
 642             if (!*blk_name(blk) && !blk_get_attached_dev(blk)) {
 643                 continue;
 644             }
 645
 646             aio_context_acquire(ctx);
 647             s = bdrv_query_bds_stats(blk_bs(blk), true);
 648             s->has_device = true;
 649             s->device = g_strdup(blk_name(blk));
 650
 651             qdev = blk_get_attached_dev_id(blk);
 652             if (qdev && *qdev) {
 653                 s->has_qdev = true;
 654                 s->qdev = qdev;
 655             } else {
 656                 g_free(qdev);
 657             }
 658
 659             bdrv_query_blk_stats(s->stats, blk);
 660             aio_context_release(ctx);
 661
 662             QAPI_LIST_APPEND(tail, s);
 663         }
 664     }
 665
 666     return head;
 667 }
 668
 669 void bdrv_snapshot_dump(QEMUSnapshotInfo *sn)
 670 {
 671     char date_buf[128], clock_buf[128];
 672     char icount_buf[128] = {0};
 673     struct tm tm;
 674     time_t ti;
 675     int64_t secs;
 676     char *sizing = NULL;
 677
 678     if (!sn) {
 679         qemu_printf("%-10s%-17s%8s%20s%13s%11s",
 680                     "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK", "ICOUNT");
 681     } else {
 682         ti = sn->date_sec;
 683         localtime_r(&ti, &tm);
 684         strftime(date_buf, sizeof(date_buf),
 685                  "%Y-%m-%d %H:%M:%S", &tm);
 686         secs = sn->vm_clock_nsec / 1000000000;
 687         snprintf(clock_buf, sizeof(clock_buf),
 688                  "%02d:%02d:%02d.%03d",
 689                  (int)(secs / 3600),
 690                  (int)((secs / 60) % 60),
 691                  (int)(secs % 60),
 692                  (int)((sn->vm_clock_nsec / 1000000) % 1000));
 693         sizing = size_to_str(sn->vm_state_size);
 694         if (sn->icount != -1ULL) {
 695             snprintf(icount_buf, sizeof(icount_buf),
 696                 "%"PRId64, sn->icount);
 697         }
 698         qemu_printf("%-9s %-16s %8s%20s%13s%11s",
 699                     sn->id_str, sn->name,
 700                     sizing,
 701                     date_buf,
 702                     clock_buf,
 703                     icount_buf);
 704     }
 705     g_free(sizing);
 706 }
 707
 708 static void dump_qdict(int indentation, QDict *dict);
 709 static void dump_qlist(int indentation, QList *list);
 710
 711 static void dump_qobject(int comp_indent, QObject *obj)
 712 {
 713     switch (qobject_type(obj)) {
 714         case QTYPE_QNUM: {
 715             QNum *value = qobject_to(QNum, obj);
 716             char *tmp = qnum_to_string(value);
 717             qemu_printf("%s", tmp);
 718             g_free(tmp);
 719             break;
 720         }
 721         case QTYPE_QSTRING: {
 722             QString *value = qobject_to(QString, obj);
 723             qemu_printf("%s", qstring_get_str(value));
 724             break;
 725         }
 726         case QTYPE_QDICT: {
 727             QDict *value = qobject_to(QDict, obj);
 728             dump_qdict(comp_indent, value);
 729             break;
 730         }
 731         case QTYPE_QLIST: {
 732             QList *value = qobject_to(QList, obj);
 733             dump_qlist(comp_indent, value);
 734             break;
 735         }
 736         case QTYPE_QBOOL: {
 737             QBool *value = qobject_to(QBool, obj);
 738             qemu_printf("%s", qbool_get_bool(value) ? "true" : "false");
 739             break;
 740         }
 741         default:
 742             abort();
 743     }
 744 }
 745
 746 static void dump_qlist(int indentation, QList *list)
 747 {
 748     const QListEntry *entry;
 749     int i = 0;
 750
 751     for (entry = qlist_first(list); entry; entry = qlist_next(entry), i++) {
 752         QType type = qobject_type(entry->value);
 753         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 754         qemu_printf("%*s[%i]:%c", indentation * 4, "", i,
 755                     composite ? '\n' : ' ');
 756         dump_qobject(indentation + 1, entry->value);
 757         if (!composite) {
 758             qemu_printf("\n");
 759         }
 760     }
 761 }
 762
 763 static void dump_qdict(int indentation, QDict *dict)
 764 {
 765     const QDictEntry *entry;
 766
 767     for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) {
 768         QType type = qobject_type(entry->value);
 769         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 770         char *key = g_malloc(strlen(entry->key) + 1);
 771         int i;
 772
 773         /* replace dashes with spaces in key (variable) names */
 774         for (i = 0; entry->key[i]; i++) {
 775             key[i] = entry->key[i] == '-' ? ' ' : entry->key[i];
 776         }
 777         key[i] = 0;
 778         qemu_printf("%*s%s:%c", indentation * 4, "", key,
 779                     composite ? '\n' : ' ');
 780         dump_qobject(indentation + 1, entry->value);
 781         if (!composite) {
 782             qemu_printf("\n");
 783         }
 784         g_free(key);
 785     }
 786 }
 787
 788 void bdrv_image_info_specific_dump(ImageInfoSpecific *info_spec)
 789 {
 790     QObject *obj, *data;
 791     Visitor *v = qobject_output_visitor_new(&obj);
 792
 793     visit_type_ImageInfoSpecific(v, NULL, &info_spec, &error_abort);
 794     visit_complete(v, &obj);
 795     data = qdict_get(qobject_to(QDict, obj), "data");
 796     dump_qobject(1, data);
 797     qobject_unref(obj);
 798     visit_free(v);
 799 }
 800
 801 void bdrv_image_info_dump(ImageInfo *info)
 802 {
 803     char *size_buf, *dsize_buf;
 804     if (!info->has_actual_size) {
 805         dsize_buf = g_strdup("unavailable");
 806     } else {
 807         dsize_buf = size_to_str(info->actual_size);
 808     }
 809     size_buf = size_to_str(info->virtual_size);
 810     qemu_printf("image: %s\n"
 811                 "file format: %s\n"
 812                 "virtual size: %s (%" PRId64 " bytes)\n"
 813                 "disk size: %s\n",
 814                 info->filename, info->format, size_buf,
 815                 info->virtual_size,
 816                 dsize_buf);
 817     g_free(size_buf);
 818     g_free(dsize_buf);
 819
 820     if (info->has_encrypted && info->encrypted) {
 821         qemu_printf("encrypted: yes\n");
 822     }
 823
 824     if (info->has_cluster_size) {
 825         qemu_printf("cluster_size: %" PRId64 "\n",
 826                     info->cluster_size);
 827     }
 828
 829     if (info->has_dirty_flag && info->dirty_flag) {
 830         qemu_printf("cleanly shut down: no\n");
 831     }
 832
 833     if (info->has_backing_filename) {
 834         qemu_printf("backing file: %s", info->backing_filename);
 835         if (!info->has_full_backing_filename) {
 836             qemu_printf(" (cannot determine actual path)");
 837         } else if (strcmp(info->backing_filename,
 838                           info->full_backing_filename) != 0) {
 839             qemu_printf(" (actual path: %s)", info->full_backing_filename);
 840         }
 841         qemu_printf("\n");
 842         if (info->has_backing_filename_format) {
 843             qemu_printf("backing file format: %s\n",
 844                         info->backing_filename_format);
 845         }
 846     }
 847
 848     if (info->has_snapshots) {
 849         SnapshotInfoList *elem;
 850
 851         qemu_printf("Snapshot list:\n");
 852         bdrv_snapshot_dump(NULL);
 853         qemu_printf("\n");
 854
 855         /* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but
 856          * we convert to the block layer's native QEMUSnapshotInfo for now.
 857          */
 858         for (elem = info->snapshots; elem; elem = elem->next) {
 859             QEMUSnapshotInfo sn = {
 860                 .vm_state_size = elem->value->vm_state_size,
 861                 .date_sec = elem->value->date_sec,
 862                 .date_nsec = elem->value->date_nsec,
 863                 .vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +
 864                                  elem->value->vm_clock_nsec,
 865                 .icount = elem->value->has_icount ?
 866                           elem->value->icount : -1ULL,
 867             };
 868
 869             pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);
 870             pstrcpy(sn.name, sizeof(sn.name), elem->value->name);
 871             bdrv_snapshot_dump(&sn);
 872             qemu_printf("\n");
 873         }
 874     }
 875
 876     if (info->has_format_specific) {
 877         qemu_printf("Format specific information:\n");
 878         bdrv_image_info_specific_dump(info->format_specific);
 879     }
 880 }