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     info->encryption_key_missing = false;
  66
  67     info->cache = g_new(BlockdevCacheInfo, 1);
  68     *info->cache = (BlockdevCacheInfo) {
  69         .writeback      = blk ? blk_enable_write_cache(blk) : true,
  70         .direct         = !!(bs->open_flags & BDRV_O_NOCACHE),
  71         .no_flush       = !!(bs->open_flags & BDRV_O_NO_FLUSH),
  72     };
  73
  74     if (bs->node_name[0]) {
  75         info->has_node_name = true;
  76         info->node_name = g_strdup(bs->node_name);
  77     }
  78
  79     backing = bdrv_cow_bs(bs);
  80     if (backing) {
  81         info->has_backing_file = true;
  82         info->backing_file = g_strdup(backing->filename);
  83     }
  84
  85     if (!QLIST_EMPTY(&bs->dirty_bitmaps)) {
  86         info->has_dirty_bitmaps = true;
  87         info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
  88     }
  89
  90     info->detect_zeroes = bs->detect_zeroes;
  91
  92     if (blk && blk_get_public(blk)->throttle_group_member.throttle_state) {
  93         ThrottleConfig cfg;
  94         BlockBackendPublic *blkp = blk_get_public(blk);
  95
  96         throttle_group_get_config(&blkp->throttle_group_member, &cfg);
  97
  98         info->bps     = cfg.buckets[THROTTLE_BPS_TOTAL].avg;
  99         info->bps_rd  = cfg.buckets[THROTTLE_BPS_READ].avg;
 100         info->bps_wr  = cfg.buckets[THROTTLE_BPS_WRITE].avg;
 101
 102         info->iops    = cfg.buckets[THROTTLE_OPS_TOTAL].avg;
 103         info->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg;
 104         info->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg;
 105
 106         info->has_bps_max     = cfg.buckets[THROTTLE_BPS_TOTAL].max;
 107         info->bps_max         = cfg.buckets[THROTTLE_BPS_TOTAL].max;
 108         info->has_bps_rd_max  = cfg.buckets[THROTTLE_BPS_READ].max;
 109         info->bps_rd_max      = cfg.buckets[THROTTLE_BPS_READ].max;
 110         info->has_bps_wr_max  = cfg.buckets[THROTTLE_BPS_WRITE].max;
 111         info->bps_wr_max      = cfg.buckets[THROTTLE_BPS_WRITE].max;
 112
 113         info->has_iops_max    = cfg.buckets[THROTTLE_OPS_TOTAL].max;
 114         info->iops_max        = cfg.buckets[THROTTLE_OPS_TOTAL].max;
 115         info->has_iops_rd_max = cfg.buckets[THROTTLE_OPS_READ].max;
 116         info->iops_rd_max     = cfg.buckets[THROTTLE_OPS_READ].max;
 117         info->has_iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max;
 118         info->iops_wr_max     = cfg.buckets[THROTTLE_OPS_WRITE].max;
 119
 120         info->has_bps_max_length     = info->has_bps_max;
 121         info->bps_max_length         =
 122             cfg.buckets[THROTTLE_BPS_TOTAL].burst_length;
 123         info->has_bps_rd_max_length  = info->has_bps_rd_max;
 124         info->bps_rd_max_length      =
 125             cfg.buckets[THROTTLE_BPS_READ].burst_length;
 126         info->has_bps_wr_max_length  = info->has_bps_wr_max;
 127         info->bps_wr_max_length      =
 128             cfg.buckets[THROTTLE_BPS_WRITE].burst_length;
 129
 130         info->has_iops_max_length    = info->has_iops_max;
 131         info->iops_max_length        =
 132             cfg.buckets[THROTTLE_OPS_TOTAL].burst_length;
 133         info->has_iops_rd_max_length = info->has_iops_rd_max;
 134         info->iops_rd_max_length     =
 135             cfg.buckets[THROTTLE_OPS_READ].burst_length;
 136         info->has_iops_wr_max_length = info->has_iops_wr_max;
 137         info->iops_wr_max_length     =
 138             cfg.buckets[THROTTLE_OPS_WRITE].burst_length;
 139
 140         info->has_iops_size = cfg.op_size;
 141         info->iops_size = cfg.op_size;
 142
 143         info->has_group = true;
 144         info->group =
 145             g_strdup(throttle_group_get_name(&blkp->throttle_group_member));
 146     }
 147
 148     info->write_threshold = bdrv_write_threshold_get(bs);
 149
 150     bs0 = bs;
 151     p_image_info = &info->image;
 152     info->backing_file_depth = 0;
 153     while (1) {
 154         Error *local_err = NULL;
 155         bdrv_query_image_info(bs0, p_image_info, &local_err);
 156         if (local_err) {
 157             error_propagate(errp, local_err);
 158             qapi_free_BlockDeviceInfo(info);
 159             return NULL;
 160         }
 161
 162         /* stop gathering data for flat output */
 163         if (flat) {
 164             break;
 165         }
 166
 167         if (bs0->drv && bdrv_filter_or_cow_child(bs0)) {
 168             /*
 169              * Put any filtered child here (for backwards compatibility to when
 170              * we put bs0->backing here, which might be any filtered child).
 171              */
 172             info->backing_file_depth++;
 173             bs0 = bdrv_filter_or_cow_bs(bs0);
 174             (*p_image_info)->has_backing_image = true;
 175             p_image_info = &((*p_image_info)->backing_image);
 176         } else {
 177             break;
 178         }
 179
 180         /* Skip automatically inserted nodes that the user isn't aware of for
 181          * query-block (blk != NULL), but not for query-named-block-nodes */
 182         if (blk) {
 183             bs0 = bdrv_skip_implicit_filters(bs0);
 184         }
 185     }
 186
 187     return info;
 188 }
 189
 190 /*
 191  * Returns 0 on success, with *p_list either set to describe snapshot
 192  * information, or NULL because there are no snapshots.  Returns -errno on
 193  * error, with *p_list untouched.
 194  */
 195 int bdrv_query_snapshot_info_list(BlockDriverState *bs,
 196                                   SnapshotInfoList **p_list,
 197                                   Error **errp)
 198 {
 199     int i, sn_count;
 200     QEMUSnapshotInfo *sn_tab = NULL;
 201     SnapshotInfoList *head = NULL, **tail = &head;
 202     SnapshotInfo *info;
 203
 204     sn_count = bdrv_snapshot_list(bs, &sn_tab);
 205     if (sn_count < 0) {
 206         const char *dev = bdrv_get_device_name(bs);
 207         switch (sn_count) {
 208         case -ENOMEDIUM:
 209             error_setg(errp, "Device '%s' is not inserted", dev);
 210             break;
 211         case -ENOTSUP:
 212             error_setg(errp,
 213                        "Device '%s' does not support internal snapshots",
 214                        dev);
 215             break;
 216         default:
 217             error_setg_errno(errp, -sn_count,
 218                              "Can't list snapshots of device '%s'", dev);
 219             break;
 220         }
 221         return sn_count;
 222     }
 223
 224     for (i = 0; i < sn_count; i++) {
 225         info = g_new0(SnapshotInfo, 1);
 226         info->id            = g_strdup(sn_tab[i].id_str);
 227         info->name          = g_strdup(sn_tab[i].name);
 228         info->vm_state_size = sn_tab[i].vm_state_size;
 229         info->date_sec      = sn_tab[i].date_sec;
 230         info->date_nsec     = sn_tab[i].date_nsec;
 231         info->vm_clock_sec  = sn_tab[i].vm_clock_nsec / 1000000000;
 232         info->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
 233         info->icount        = sn_tab[i].icount;
 234         info->has_icount    = sn_tab[i].icount != -1ULL;
 235
 236         QAPI_LIST_APPEND(tail, info);
 237     }
 238
 239     g_free(sn_tab);
 240     *p_list = head;
 241     return 0;
 242 }
 243
 244 /**
 245  * bdrv_query_image_info:
 246  * @bs: block device to examine
 247  * @p_info: location to store image information
 248  * @errp: location to store error information
 249  *
 250  * Store "flat" image information in @p_info.
 251  *
 252  * "Flat" means it does *not* query backing image information,
 253  * i.e. (*pinfo)->has_backing_image will be set to false and
 254  * (*pinfo)->backing_image to NULL even when the image does in fact have
 255  * a backing image.
 256  *
 257  * @p_info will be set only on success. On error, store error in @errp.
 258  */
 259 void bdrv_query_image_info(BlockDriverState *bs,
 260                            ImageInfo **p_info,
 261                            Error **errp)
 262 {
 263     int64_t size;
 264     const char *backing_filename;
 265     BlockDriverInfo bdi;
 266     int ret;
 267     Error *err = NULL;
 268     ImageInfo *info;
 269
 270     aio_context_acquire(bdrv_get_aio_context(bs));
 271
 272     size = bdrv_getlength(bs);
 273     if (size < 0) {
 274         error_setg_errno(errp, -size, "Can't get image size '%s'",
 275                          bs->exact_filename);
 276         goto out;
 277     }
 278
 279     bdrv_refresh_filename(bs);
 280
 281     info = g_new0(ImageInfo, 1);
 282     info->filename        = g_strdup(bs->filename);
 283     info->format          = g_strdup(bdrv_get_format_name(bs));
 284     info->virtual_size    = size;
 285     info->actual_size     = bdrv_get_allocated_file_size(bs);
 286     info->has_actual_size = info->actual_size >= 0;
 287     if (bs->encrypted) {
 288         info->encrypted = true;
 289         info->has_encrypted = true;
 290     }
 291     if (bdrv_get_info(bs, &bdi) >= 0) {
 292         if (bdi.cluster_size != 0) {
 293             info->cluster_size = bdi.cluster_size;
 294             info->has_cluster_size = true;
 295         }
 296         info->dirty_flag = bdi.is_dirty;
 297         info->has_dirty_flag = true;
 298     }
 299     info->format_specific = bdrv_get_specific_info(bs, &err);
 300     if (err) {
 301         error_propagate(errp, err);
 302         qapi_free_ImageInfo(info);
 303         goto out;
 304     }
 305     info->has_format_specific = info->format_specific != NULL;
 306
 307     backing_filename = bs->backing_file;
 308     if (backing_filename[0] != '\0') {
 309         char *backing_filename2;
 310
 311         info->backing_filename = g_strdup(backing_filename);
 312         info->has_backing_filename = true;
 313         backing_filename2 = bdrv_get_full_backing_filename(bs, NULL);
 314
 315         /* Always report the full_backing_filename if present, even if it's the
 316          * same as backing_filename. That they are same is useful info. */
 317         if (backing_filename2) {
 318             info->full_backing_filename = g_strdup(backing_filename2);
 319             info->has_full_backing_filename = true;
 320         }
 321
 322         if (bs->backing_format[0]) {
 323             info->backing_filename_format = g_strdup(bs->backing_format);
 324             info->has_backing_filename_format = true;
 325         }
 326         g_free(backing_filename2);
 327     }
 328
 329     ret = bdrv_query_snapshot_info_list(bs, &info->snapshots, &err);
 330     switch (ret) {
 331     case 0:
 332         if (info->snapshots) {
 333             info->has_snapshots = true;
 334         }
 335         break;
 336     /* recoverable error */
 337     case -ENOMEDIUM:
 338     case -ENOTSUP:
 339         error_free(err);
 340         break;
 341     default:
 342         error_propagate(errp, err);
 343         qapi_free_ImageInfo(info);
 344         goto out;
 345     }
 346
 347     *p_info = info;
 348
 349 out:
 350     aio_context_release(bdrv_get_aio_context(bs));
 351 }
 352
 353 /* @p_info will be set only on success. */
 354 static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
 355                             Error **errp)
 356 {
 357     BlockInfo *info = g_malloc0(sizeof(*info));
 358     BlockDriverState *bs = blk_bs(blk);
 359     char *qdev;
 360
 361     /* Skip automatically inserted nodes that the user isn't aware of */
 362     bs = bdrv_skip_implicit_filters(bs);
 363
 364     info->device = g_strdup(blk_name(blk));
 365     info->type = g_strdup("unknown");
 366     info->locked = blk_dev_is_medium_locked(blk);
 367     info->removable = blk_dev_has_removable_media(blk);
 368
 369     qdev = blk_get_attached_dev_id(blk);
 370     if (qdev && *qdev) {
 371         info->has_qdev = true;
 372         info->qdev = qdev;
 373     } else {
 374         g_free(qdev);
 375     }
 376
 377     if (blk_dev_has_tray(blk)) {
 378         info->has_tray_open = true;
 379         info->tray_open = blk_dev_is_tray_open(blk);
 380     }
 381
 382     if (blk_iostatus_is_enabled(blk)) {
 383         info->has_io_status = true;
 384         info->io_status = blk_iostatus(blk);
 385     }
 386
 387     if (bs && !QLIST_EMPTY(&bs->dirty_bitmaps)) {
 388         info->has_dirty_bitmaps = true;
 389         info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
 390     }
 391
 392     if (bs && bs->drv) {
 393         info->has_inserted = true;
 394         info->inserted = bdrv_block_device_info(blk, bs, false, errp);
 395         if (info->inserted == NULL) {
 396             goto err;
 397         }
 398     }
 399
 400     *p_info = info;
 401     return;
 402
 403  err:
 404     qapi_free_BlockInfo(info);
 405 }
 406
 407 static uint64List *uint64_list(uint64_t *list, int size)
 408 {
 409     int i;
 410     uint64List *out_list = NULL;
 411     uint64List **tail = &out_list;
 412
 413     for (i = 0; i < size; i++) {
 414         QAPI_LIST_APPEND(tail, list[i]);
 415     }
 416
 417     return out_list;
 418 }
 419
 420 static void bdrv_latency_histogram_stats(BlockLatencyHistogram *hist,
 421                                          bool *not_null,
 422                                          BlockLatencyHistogramInfo **info)
 423 {
 424     *not_null = hist->bins != NULL;
 425     if (*not_null) {
 426         *info = g_new0(BlockLatencyHistogramInfo, 1);
 427
 428         (*info)->boundaries = uint64_list(hist->boundaries, hist->nbins - 1);
 429         (*info)->bins = uint64_list(hist->bins, hist->nbins);
 430     }
 431 }
 432
 433 static void bdrv_query_blk_stats(BlockDeviceStats *ds, BlockBackend *blk)
 434 {
 435     BlockAcctStats *stats = blk_get_stats(blk);
 436     BlockAcctTimedStats *ts = NULL;
 437
 438     ds->rd_bytes = stats->nr_bytes[BLOCK_ACCT_READ];
 439     ds->wr_bytes = stats->nr_bytes[BLOCK_ACCT_WRITE];
 440     ds->unmap_bytes = stats->nr_bytes[BLOCK_ACCT_UNMAP];
 441     ds->rd_operations = stats->nr_ops[BLOCK_ACCT_READ];
 442     ds->wr_operations = stats->nr_ops[BLOCK_ACCT_WRITE];
 443     ds->unmap_operations = stats->nr_ops[BLOCK_ACCT_UNMAP];
 444
 445     ds->failed_rd_operations = stats->failed_ops[BLOCK_ACCT_READ];
 446     ds->failed_wr_operations = stats->failed_ops[BLOCK_ACCT_WRITE];
 447     ds->failed_flush_operations = stats->failed_ops[BLOCK_ACCT_FLUSH];
 448     ds->failed_unmap_operations = stats->failed_ops[BLOCK_ACCT_UNMAP];
 449
 450     ds->invalid_rd_operations = stats->invalid_ops[BLOCK_ACCT_READ];
 451     ds->invalid_wr_operations = stats->invalid_ops[BLOCK_ACCT_WRITE];
 452     ds->invalid_flush_operations =
 453         stats->invalid_ops[BLOCK_ACCT_FLUSH];
 454     ds->invalid_unmap_operations = stats->invalid_ops[BLOCK_ACCT_UNMAP];
 455
 456     ds->rd_merged = stats->merged[BLOCK_ACCT_READ];
 457     ds->wr_merged = stats->merged[BLOCK_ACCT_WRITE];
 458     ds->unmap_merged = stats->merged[BLOCK_ACCT_UNMAP];
 459     ds->flush_operations = stats->nr_ops[BLOCK_ACCT_FLUSH];
 460     ds->wr_total_time_ns = stats->total_time_ns[BLOCK_ACCT_WRITE];
 461     ds->rd_total_time_ns = stats->total_time_ns[BLOCK_ACCT_READ];
 462     ds->flush_total_time_ns = stats->total_time_ns[BLOCK_ACCT_FLUSH];
 463     ds->unmap_total_time_ns = stats->total_time_ns[BLOCK_ACCT_UNMAP];
 464
 465     ds->has_idle_time_ns = stats->last_access_time_ns > 0;
 466     if (ds->has_idle_time_ns) {
 467         ds->idle_time_ns = block_acct_idle_time_ns(stats);
 468     }
 469
 470     ds->account_invalid = stats->account_invalid;
 471     ds->account_failed = stats->account_failed;
 472
 473     while ((ts = block_acct_interval_next(stats, ts))) {
 474         BlockDeviceTimedStats *dev_stats = g_malloc0(sizeof(*dev_stats));
 475
 476         TimedAverage *rd = &ts->latency[BLOCK_ACCT_READ];
 477         TimedAverage *wr = &ts->latency[BLOCK_ACCT_WRITE];
 478         TimedAverage *fl = &ts->latency[BLOCK_ACCT_FLUSH];
 479
 480         dev_stats->interval_length = ts->interval_length;
 481
 482         dev_stats->min_rd_latency_ns = timed_average_min(rd);
 483         dev_stats->max_rd_latency_ns = timed_average_max(rd);
 484         dev_stats->avg_rd_latency_ns = timed_average_avg(rd);
 485
 486         dev_stats->min_wr_latency_ns = timed_average_min(wr);
 487         dev_stats->max_wr_latency_ns = timed_average_max(wr);
 488         dev_stats->avg_wr_latency_ns = timed_average_avg(wr);
 489
 490         dev_stats->min_flush_latency_ns = timed_average_min(fl);
 491         dev_stats->max_flush_latency_ns = timed_average_max(fl);
 492         dev_stats->avg_flush_latency_ns = timed_average_avg(fl);
 493
 494         dev_stats->avg_rd_queue_depth =
 495             block_acct_queue_depth(ts, BLOCK_ACCT_READ);
 496         dev_stats->avg_wr_queue_depth =
 497             block_acct_queue_depth(ts, BLOCK_ACCT_WRITE);
 498
 499         QAPI_LIST_PREPEND(ds->timed_stats, dev_stats);
 500     }
 501
 502     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_READ],
 503                                  &ds->has_rd_latency_histogram,
 504                                  &ds->rd_latency_histogram);
 505     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_WRITE],
 506                                  &ds->has_wr_latency_histogram,
 507                                  &ds->wr_latency_histogram);
 508     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_FLUSH],
 509                                  &ds->has_flush_latency_histogram,
 510                                  &ds->flush_latency_histogram);
 511 }
 512
 513 static BlockStats *bdrv_query_bds_stats(BlockDriverState *bs,
 514                                         bool blk_level)
 515 {
 516     BdrvChild *parent_child;
 517     BlockDriverState *filter_or_cow_bs;
 518     BlockStats *s = NULL;
 519
 520     s = g_malloc0(sizeof(*s));
 521     s->stats = g_malloc0(sizeof(*s->stats));
 522
 523     if (!bs) {
 524         return s;
 525     }
 526
 527     /* Skip automatically inserted nodes that the user isn't aware of in
 528      * a BlockBackend-level command. Stay at the exact node for a node-level
 529      * command. */
 530     if (blk_level) {
 531         bs = bdrv_skip_implicit_filters(bs);
 532     }
 533
 534     if (bdrv_get_node_name(bs)[0]) {
 535         s->has_node_name = true;
 536         s->node_name = g_strdup(bdrv_get_node_name(bs));
 537     }
 538
 539     s->stats->wr_highest_offset = stat64_get(&bs->wr_highest_offset);
 540
 541     s->driver_specific = bdrv_get_specific_stats(bs);
 542     if (s->driver_specific) {
 543         s->has_driver_specific = true;
 544     }
 545
 546     parent_child = bdrv_primary_child(bs);
 547     if (!parent_child ||
 548         !(parent_child->role & (BDRV_CHILD_DATA | BDRV_CHILD_FILTERED)))
 549     {
 550         BdrvChild *c;
 551
 552         /*
 553          * Look for a unique data-storing child.  We do not need to look for
 554          * filtered children, as there would be only one and it would have been
 555          * the primary child.
 556          */
 557         parent_child = NULL;
 558         QLIST_FOREACH(c, &bs->children, next) {
 559             if (c->role & BDRV_CHILD_DATA) {
 560                 if (parent_child) {
 561                     /*
 562                      * There are multiple data-storing children and we cannot
 563                      * choose between them.
 564                      */
 565                     parent_child = NULL;
 566                     break;
 567                 }
 568                 parent_child = c;
 569             }
 570         }
 571     }
 572     if (parent_child) {
 573         s->has_parent = true;
 574         s->parent = bdrv_query_bds_stats(parent_child->bs, blk_level);
 575     }
 576
 577     filter_or_cow_bs = bdrv_filter_or_cow_bs(bs);
 578     if (blk_level && filter_or_cow_bs) {
 579         /*
 580          * Put any filtered or COW child here (for backwards
 581          * compatibility to when we put bs0->backing here, which might
 582          * be either)
 583          */
 584         s->has_backing = true;
 585         s->backing = bdrv_query_bds_stats(filter_or_cow_bs, blk_level);
 586     }
 587
 588     return s;
 589 }
 590
 591 BlockInfoList *qmp_query_block(Error **errp)
 592 {
 593     BlockInfoList *head = NULL, **p_next = &head;
 594     BlockBackend *blk;
 595     Error *local_err = NULL;
 596
 597     for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
 598         BlockInfoList *info;
 599
 600         if (!*blk_name(blk) && !blk_get_attached_dev(blk)) {
 601             continue;
 602         }
 603
 604         info = g_malloc0(sizeof(*info));
 605         bdrv_query_info(blk, &info->value, &local_err);
 606         if (local_err) {
 607             error_propagate(errp, local_err);
 608             g_free(info);
 609             qapi_free_BlockInfoList(head);
 610             return NULL;
 611         }
 612
 613         *p_next = info;
 614         p_next = &info->next;
 615     }
 616
 617     return head;
 618 }
 619
 620 BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
 621                                      bool query_nodes,
 622                                      Error **errp)
 623 {
 624     BlockStatsList *head = NULL, **tail = &head;
 625     BlockBackend *blk;
 626     BlockDriverState *bs;
 627
 628     /* Just to be safe if query_nodes is not always initialized */
 629     if (has_query_nodes && query_nodes) {
 630         for (bs = bdrv_next_node(NULL); bs; bs = bdrv_next_node(bs)) {
 631             AioContext *ctx = bdrv_get_aio_context(bs);
 632
 633             aio_context_acquire(ctx);
 634             QAPI_LIST_APPEND(tail, bdrv_query_bds_stats(bs, false));
 635             aio_context_release(ctx);
 636         }
 637     } else {
 638         for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
 639             AioContext *ctx = blk_get_aio_context(blk);
 640             BlockStats *s;
 641             char *qdev;
 642
 643             if (!*blk_name(blk) && !blk_get_attached_dev(blk)) {
 644                 continue;
 645             }
 646
 647             aio_context_acquire(ctx);
 648             s = bdrv_query_bds_stats(blk_bs(blk), true);
 649             s->has_device = true;
 650             s->device = g_strdup(blk_name(blk));
 651
 652             qdev = blk_get_attached_dev_id(blk);
 653             if (qdev && *qdev) {
 654                 s->has_qdev = true;
 655                 s->qdev = qdev;
 656             } else {
 657                 g_free(qdev);
 658             }
 659
 660             bdrv_query_blk_stats(s->stats, blk);
 661             aio_context_release(ctx);
 662
 663             QAPI_LIST_APPEND(tail, s);
 664         }
 665     }
 666
 667     return head;
 668 }
 669
 670 void bdrv_snapshot_dump(QEMUSnapshotInfo *sn)
 671 {
 672     char date_buf[128], clock_buf[128];
 673     char icount_buf[128] = {0};
 674     struct tm tm;
 675     time_t ti;
 676     int64_t secs;
 677     char *sizing = NULL;
 678
 679     if (!sn) {
 680         qemu_printf("%-10s%-17s%8s%20s%13s%11s",
 681                     "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK", "ICOUNT");
 682     } else {
 683         ti = sn->date_sec;
 684         localtime_r(&ti, &tm);
 685         strftime(date_buf, sizeof(date_buf),
 686                  "%Y-%m-%d %H:%M:%S", &tm);
 687         secs = sn->vm_clock_nsec / 1000000000;
 688         snprintf(clock_buf, sizeof(clock_buf),
 689                  "%02d:%02d:%02d.%03d",
 690                  (int)(secs / 3600),
 691                  (int)((secs / 60) % 60),
 692                  (int)(secs % 60),
 693                  (int)((sn->vm_clock_nsec / 1000000) % 1000));
 694         sizing = size_to_str(sn->vm_state_size);
 695         if (sn->icount != -1ULL) {
 696             snprintf(icount_buf, sizeof(icount_buf),
 697                 "%"PRId64, sn->icount);
 698         }
 699         qemu_printf("%-9s %-16s %8s%20s%13s%11s",
 700                     sn->id_str, sn->name,
 701                     sizing,
 702                     date_buf,
 703                     clock_buf,
 704                     icount_buf);
 705     }
 706     g_free(sizing);
 707 }
 708
 709 static void dump_qdict(int indentation, QDict *dict);
 710 static void dump_qlist(int indentation, QList *list);
 711
 712 static void dump_qobject(int comp_indent, QObject *obj)
 713 {
 714     switch (qobject_type(obj)) {
 715         case QTYPE_QNUM: {
 716             QNum *value = qobject_to(QNum, obj);
 717             char *tmp = qnum_to_string(value);
 718             qemu_printf("%s", tmp);
 719             g_free(tmp);
 720             break;
 721         }
 722         case QTYPE_QSTRING: {
 723             QString *value = qobject_to(QString, obj);
 724             qemu_printf("%s", qstring_get_str(value));
 725             break;
 726         }
 727         case QTYPE_QDICT: {
 728             QDict *value = qobject_to(QDict, obj);
 729             dump_qdict(comp_indent, value);
 730             break;
 731         }
 732         case QTYPE_QLIST: {
 733             QList *value = qobject_to(QList, obj);
 734             dump_qlist(comp_indent, value);
 735             break;
 736         }
 737         case QTYPE_QBOOL: {
 738             QBool *value = qobject_to(QBool, obj);
 739             qemu_printf("%s", qbool_get_bool(value) ? "true" : "false");
 740             break;
 741         }
 742         default:
 743             abort();
 744     }
 745 }
 746
 747 static void dump_qlist(int indentation, QList *list)
 748 {
 749     const QListEntry *entry;
 750     int i = 0;
 751
 752     for (entry = qlist_first(list); entry; entry = qlist_next(entry), i++) {
 753         QType type = qobject_type(entry->value);
 754         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 755         qemu_printf("%*s[%i]:%c", indentation * 4, "", i,
 756                     composite ? '\n' : ' ');
 757         dump_qobject(indentation + 1, entry->value);
 758         if (!composite) {
 759             qemu_printf("\n");
 760         }
 761     }
 762 }
 763
 764 static void dump_qdict(int indentation, QDict *dict)
 765 {
 766     const QDictEntry *entry;
 767
 768     for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) {
 769         QType type = qobject_type(entry->value);
 770         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 771         char *key = g_malloc(strlen(entry->key) + 1);
 772         int i;
 773
 774         /* replace dashes with spaces in key (variable) names */
 775         for (i = 0; entry->key[i]; i++) {
 776             key[i] = entry->key[i] == '-' ? ' ' : entry->key[i];
 777         }
 778         key[i] = 0;
 779         qemu_printf("%*s%s:%c", indentation * 4, "", key,
 780                     composite ? '\n' : ' ');
 781         dump_qobject(indentation + 1, entry->value);
 782         if (!composite) {
 783             qemu_printf("\n");
 784         }
 785         g_free(key);
 786     }
 787 }
 788
 789 void bdrv_image_info_specific_dump(ImageInfoSpecific *info_spec)
 790 {
 791     QObject *obj, *data;
 792     Visitor *v = qobject_output_visitor_new(&obj);
 793
 794     visit_type_ImageInfoSpecific(v, NULL, &info_spec, &error_abort);
 795     visit_complete(v, &obj);
 796     data = qdict_get(qobject_to(QDict, obj), "data");
 797     dump_qobject(1, data);
 798     qobject_unref(obj);
 799     visit_free(v);
 800 }
 801
 802 void bdrv_image_info_dump(ImageInfo *info)
 803 {
 804     char *size_buf, *dsize_buf;
 805     if (!info->has_actual_size) {
 806         dsize_buf = g_strdup("unavailable");
 807     } else {
 808         dsize_buf = size_to_str(info->actual_size);
 809     }
 810     size_buf = size_to_str(info->virtual_size);
 811     qemu_printf("image: %s\n"
 812                 "file format: %s\n"
 813                 "virtual size: %s (%" PRId64 " bytes)\n"
 814                 "disk size: %s\n",
 815                 info->filename, info->format, size_buf,
 816                 info->virtual_size,
 817                 dsize_buf);
 818     g_free(size_buf);
 819     g_free(dsize_buf);
 820
 821     if (info->has_encrypted && info->encrypted) {
 822         qemu_printf("encrypted: yes\n");
 823     }
 824
 825     if (info->has_cluster_size) {
 826         qemu_printf("cluster_size: %" PRId64 "\n",
 827                     info->cluster_size);
 828     }
 829
 830     if (info->has_dirty_flag && info->dirty_flag) {
 831         qemu_printf("cleanly shut down: no\n");
 832     }
 833
 834     if (info->has_backing_filename) {
 835         qemu_printf("backing file: %s", info->backing_filename);
 836         if (!info->has_full_backing_filename) {
 837             qemu_printf(" (cannot determine actual path)");
 838         } else if (strcmp(info->backing_filename,
 839                           info->full_backing_filename) != 0) {
 840             qemu_printf(" (actual path: %s)", info->full_backing_filename);
 841         }
 842         qemu_printf("\n");
 843         if (info->has_backing_filename_format) {
 844             qemu_printf("backing file format: %s\n",
 845                         info->backing_filename_format);
 846         }
 847     }
 848
 849     if (info->has_snapshots) {
 850         SnapshotInfoList *elem;
 851
 852         qemu_printf("Snapshot list:\n");
 853         bdrv_snapshot_dump(NULL);
 854         qemu_printf("\n");
 855
 856         /* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but
 857          * we convert to the block layer's native QEMUSnapshotInfo for now.
 858          */
 859         for (elem = info->snapshots; elem; elem = elem->next) {
 860             QEMUSnapshotInfo sn = {
 861                 .vm_state_size = elem->value->vm_state_size,
 862                 .date_sec = elem->value->date_sec,
 863                 .date_nsec = elem->value->date_nsec,
 864                 .vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +
 865                                  elem->value->vm_clock_nsec,
 866                 .icount = elem->value->has_icount ?
 867                           elem->value->icount : -1ULL,
 868             };
 869
 870             pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);
 871             pstrcpy(sn.name, sizeof(sn.name), elem->value->name);
 872             bdrv_snapshot_dump(&sn);
 873             qemu_printf("\n");
 874         }
 875     }
 876
 877     if (info->has_format_specific) {
 878         qemu_printf("Format specific information:\n");
 879         bdrv_image_info_specific_dump(info->format_specific);
 880     }
 881 }