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 && bs->drv) {
 387         info->has_inserted = true;
 388         info->inserted = bdrv_block_device_info(blk, bs, false, errp);
 389         if (info->inserted == NULL) {
 390             goto err;
 391         }
 392     }
 393
 394     *p_info = info;
 395     return;
 396
 397  err:
 398     qapi_free_BlockInfo(info);
 399 }
 400
 401 static uint64List *uint64_list(uint64_t *list, int size)
 402 {
 403     int i;
 404     uint64List *out_list = NULL;
 405     uint64List **tail = &out_list;
 406
 407     for (i = 0; i < size; i++) {
 408         QAPI_LIST_APPEND(tail, list[i]);
 409     }
 410
 411     return out_list;
 412 }
 413
 414 static void bdrv_latency_histogram_stats(BlockLatencyHistogram *hist,
 415                                          bool *not_null,
 416                                          BlockLatencyHistogramInfo **info)
 417 {
 418     *not_null = hist->bins != NULL;
 419     if (*not_null) {
 420         *info = g_new0(BlockLatencyHistogramInfo, 1);
 421
 422         (*info)->boundaries = uint64_list(hist->boundaries, hist->nbins - 1);
 423         (*info)->bins = uint64_list(hist->bins, hist->nbins);
 424     }
 425 }
 426
 427 static void bdrv_query_blk_stats(BlockDeviceStats *ds, BlockBackend *blk)
 428 {
 429     BlockAcctStats *stats = blk_get_stats(blk);
 430     BlockAcctTimedStats *ts = NULL;
 431
 432     ds->rd_bytes = stats->nr_bytes[BLOCK_ACCT_READ];
 433     ds->wr_bytes = stats->nr_bytes[BLOCK_ACCT_WRITE];
 434     ds->unmap_bytes = stats->nr_bytes[BLOCK_ACCT_UNMAP];
 435     ds->rd_operations = stats->nr_ops[BLOCK_ACCT_READ];
 436     ds->wr_operations = stats->nr_ops[BLOCK_ACCT_WRITE];
 437     ds->unmap_operations = stats->nr_ops[BLOCK_ACCT_UNMAP];
 438
 439     ds->failed_rd_operations = stats->failed_ops[BLOCK_ACCT_READ];
 440     ds->failed_wr_operations = stats->failed_ops[BLOCK_ACCT_WRITE];
 441     ds->failed_flush_operations = stats->failed_ops[BLOCK_ACCT_FLUSH];
 442     ds->failed_unmap_operations = stats->failed_ops[BLOCK_ACCT_UNMAP];
 443
 444     ds->invalid_rd_operations = stats->invalid_ops[BLOCK_ACCT_READ];
 445     ds->invalid_wr_operations = stats->invalid_ops[BLOCK_ACCT_WRITE];
 446     ds->invalid_flush_operations =
 447         stats->invalid_ops[BLOCK_ACCT_FLUSH];
 448     ds->invalid_unmap_operations = stats->invalid_ops[BLOCK_ACCT_UNMAP];
 449
 450     ds->rd_merged = stats->merged[BLOCK_ACCT_READ];
 451     ds->wr_merged = stats->merged[BLOCK_ACCT_WRITE];
 452     ds->unmap_merged = stats->merged[BLOCK_ACCT_UNMAP];
 453     ds->flush_operations = stats->nr_ops[BLOCK_ACCT_FLUSH];
 454     ds->wr_total_time_ns = stats->total_time_ns[BLOCK_ACCT_WRITE];
 455     ds->rd_total_time_ns = stats->total_time_ns[BLOCK_ACCT_READ];
 456     ds->flush_total_time_ns = stats->total_time_ns[BLOCK_ACCT_FLUSH];
 457     ds->unmap_total_time_ns = stats->total_time_ns[BLOCK_ACCT_UNMAP];
 458
 459     ds->has_idle_time_ns = stats->last_access_time_ns > 0;
 460     if (ds->has_idle_time_ns) {
 461         ds->idle_time_ns = block_acct_idle_time_ns(stats);
 462     }
 463
 464     ds->account_invalid = stats->account_invalid;
 465     ds->account_failed = stats->account_failed;
 466
 467     while ((ts = block_acct_interval_next(stats, ts))) {
 468         BlockDeviceTimedStats *dev_stats = g_malloc0(sizeof(*dev_stats));
 469
 470         TimedAverage *rd = &ts->latency[BLOCK_ACCT_READ];
 471         TimedAverage *wr = &ts->latency[BLOCK_ACCT_WRITE];
 472         TimedAverage *fl = &ts->latency[BLOCK_ACCT_FLUSH];
 473
 474         dev_stats->interval_length = ts->interval_length;
 475
 476         dev_stats->min_rd_latency_ns = timed_average_min(rd);
 477         dev_stats->max_rd_latency_ns = timed_average_max(rd);
 478         dev_stats->avg_rd_latency_ns = timed_average_avg(rd);
 479
 480         dev_stats->min_wr_latency_ns = timed_average_min(wr);
 481         dev_stats->max_wr_latency_ns = timed_average_max(wr);
 482         dev_stats->avg_wr_latency_ns = timed_average_avg(wr);
 483
 484         dev_stats->min_flush_latency_ns = timed_average_min(fl);
 485         dev_stats->max_flush_latency_ns = timed_average_max(fl);
 486         dev_stats->avg_flush_latency_ns = timed_average_avg(fl);
 487
 488         dev_stats->avg_rd_queue_depth =
 489             block_acct_queue_depth(ts, BLOCK_ACCT_READ);
 490         dev_stats->avg_wr_queue_depth =
 491             block_acct_queue_depth(ts, BLOCK_ACCT_WRITE);
 492
 493         QAPI_LIST_PREPEND(ds->timed_stats, dev_stats);
 494     }
 495
 496     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_READ],
 497                                  &ds->has_rd_latency_histogram,
 498                                  &ds->rd_latency_histogram);
 499     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_WRITE],
 500                                  &ds->has_wr_latency_histogram,
 501                                  &ds->wr_latency_histogram);
 502     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_FLUSH],
 503                                  &ds->has_flush_latency_histogram,
 504                                  &ds->flush_latency_histogram);
 505 }
 506
 507 static BlockStats *bdrv_query_bds_stats(BlockDriverState *bs,
 508                                         bool blk_level)
 509 {
 510     BdrvChild *parent_child;
 511     BlockDriverState *filter_or_cow_bs;
 512     BlockStats *s = NULL;
 513
 514     s = g_malloc0(sizeof(*s));
 515     s->stats = g_malloc0(sizeof(*s->stats));
 516
 517     if (!bs) {
 518         return s;
 519     }
 520
 521     /* Skip automatically inserted nodes that the user isn't aware of in
 522      * a BlockBackend-level command. Stay at the exact node for a node-level
 523      * command. */
 524     if (blk_level) {
 525         bs = bdrv_skip_implicit_filters(bs);
 526     }
 527
 528     if (bdrv_get_node_name(bs)[0]) {
 529         s->has_node_name = true;
 530         s->node_name = g_strdup(bdrv_get_node_name(bs));
 531     }
 532
 533     s->stats->wr_highest_offset = stat64_get(&bs->wr_highest_offset);
 534
 535     s->driver_specific = bdrv_get_specific_stats(bs);
 536     if (s->driver_specific) {
 537         s->has_driver_specific = true;
 538     }
 539
 540     parent_child = bdrv_primary_child(bs);
 541     if (!parent_child ||
 542         !(parent_child->role & (BDRV_CHILD_DATA | BDRV_CHILD_FILTERED)))
 543     {
 544         BdrvChild *c;
 545
 546         /*
 547          * Look for a unique data-storing child.  We do not need to look for
 548          * filtered children, as there would be only one and it would have been
 549          * the primary child.
 550          */
 551         parent_child = NULL;
 552         QLIST_FOREACH(c, &bs->children, next) {
 553             if (c->role & BDRV_CHILD_DATA) {
 554                 if (parent_child) {
 555                     /*
 556                      * There are multiple data-storing children and we cannot
 557                      * choose between them.
 558                      */
 559                     parent_child = NULL;
 560                     break;
 561                 }
 562                 parent_child = c;
 563             }
 564         }
 565     }
 566     if (parent_child) {
 567         s->has_parent = true;
 568         s->parent = bdrv_query_bds_stats(parent_child->bs, blk_level);
 569     }
 570
 571     filter_or_cow_bs = bdrv_filter_or_cow_bs(bs);
 572     if (blk_level && filter_or_cow_bs) {
 573         /*
 574          * Put any filtered or COW child here (for backwards
 575          * compatibility to when we put bs0->backing here, which might
 576          * be either)
 577          */
 578         s->has_backing = true;
 579         s->backing = bdrv_query_bds_stats(filter_or_cow_bs, blk_level);
 580     }
 581
 582     return s;
 583 }
 584
 585 BlockInfoList *qmp_query_block(Error **errp)
 586 {
 587     BlockInfoList *head = NULL, **p_next = &head;
 588     BlockBackend *blk;
 589     Error *local_err = NULL;
 590
 591     for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
 592         BlockInfoList *info;
 593
 594         if (!*blk_name(blk) && !blk_get_attached_dev(blk)) {
 595             continue;
 596         }
 597
 598         info = g_malloc0(sizeof(*info));
 599         bdrv_query_info(blk, &info->value, &local_err);
 600         if (local_err) {
 601             error_propagate(errp, local_err);
 602             g_free(info);
 603             qapi_free_BlockInfoList(head);
 604             return NULL;
 605         }
 606
 607         *p_next = info;
 608         p_next = &info->next;
 609     }
 610
 611     return head;
 612 }
 613
 614 BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
 615                                      bool query_nodes,
 616                                      Error **errp)
 617 {
 618     BlockStatsList *head = NULL, **tail = &head;
 619     BlockBackend *blk;
 620     BlockDriverState *bs;
 621
 622     /* Just to be safe if query_nodes is not always initialized */
 623     if (has_query_nodes && query_nodes) {
 624         for (bs = bdrv_next_node(NULL); bs; bs = bdrv_next_node(bs)) {
 625             AioContext *ctx = bdrv_get_aio_context(bs);
 626
 627             aio_context_acquire(ctx);
 628             QAPI_LIST_APPEND(tail, bdrv_query_bds_stats(bs, false));
 629             aio_context_release(ctx);
 630         }
 631     } else {
 632         for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
 633             AioContext *ctx = blk_get_aio_context(blk);
 634             BlockStats *s;
 635             char *qdev;
 636
 637             if (!*blk_name(blk) && !blk_get_attached_dev(blk)) {
 638                 continue;
 639             }
 640
 641             aio_context_acquire(ctx);
 642             s = bdrv_query_bds_stats(blk_bs(blk), true);
 643             s->has_device = true;
 644             s->device = g_strdup(blk_name(blk));
 645
 646             qdev = blk_get_attached_dev_id(blk);
 647             if (qdev && *qdev) {
 648                 s->has_qdev = true;
 649                 s->qdev = qdev;
 650             } else {
 651                 g_free(qdev);
 652             }
 653
 654             bdrv_query_blk_stats(s->stats, blk);
 655             aio_context_release(ctx);
 656
 657             QAPI_LIST_APPEND(tail, s);
 658         }
 659     }
 660
 661     return head;
 662 }
 663
 664 void bdrv_snapshot_dump(QEMUSnapshotInfo *sn)
 665 {
 666     char date_buf[128], clock_buf[128];
 667     char icount_buf[128] = {0};
 668     struct tm tm;
 669     time_t ti;
 670     int64_t secs;
 671     char *sizing = NULL;
 672
 673     if (!sn) {
 674         qemu_printf("%-10s%-17s%8s%20s%13s%11s",
 675                     "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK", "ICOUNT");
 676     } else {
 677         ti = sn->date_sec;
 678         localtime_r(&ti, &tm);
 679         strftime(date_buf, sizeof(date_buf),
 680                  "%Y-%m-%d %H:%M:%S", &tm);
 681         secs = sn->vm_clock_nsec / 1000000000;
 682         snprintf(clock_buf, sizeof(clock_buf),
 683                  "%02d:%02d:%02d.%03d",
 684                  (int)(secs / 3600),
 685                  (int)((secs / 60) % 60),
 686                  (int)(secs % 60),
 687                  (int)((sn->vm_clock_nsec / 1000000) % 1000));
 688         sizing = size_to_str(sn->vm_state_size);
 689         if (sn->icount != -1ULL) {
 690             snprintf(icount_buf, sizeof(icount_buf),
 691                 "%"PRId64, sn->icount);
 692         }
 693         qemu_printf("%-9s %-16s %8s%20s%13s%11s",
 694                     sn->id_str, sn->name,
 695                     sizing,
 696                     date_buf,
 697                     clock_buf,
 698                     icount_buf);
 699     }
 700     g_free(sizing);
 701 }
 702
 703 static void dump_qdict(int indentation, QDict *dict);
 704 static void dump_qlist(int indentation, QList *list);
 705
 706 static void dump_qobject(int comp_indent, QObject *obj)
 707 {
 708     switch (qobject_type(obj)) {
 709         case QTYPE_QNUM: {
 710             QNum *value = qobject_to(QNum, obj);
 711             char *tmp = qnum_to_string(value);
 712             qemu_printf("%s", tmp);
 713             g_free(tmp);
 714             break;
 715         }
 716         case QTYPE_QSTRING: {
 717             QString *value = qobject_to(QString, obj);
 718             qemu_printf("%s", qstring_get_str(value));
 719             break;
 720         }
 721         case QTYPE_QDICT: {
 722             QDict *value = qobject_to(QDict, obj);
 723             dump_qdict(comp_indent, value);
 724             break;
 725         }
 726         case QTYPE_QLIST: {
 727             QList *value = qobject_to(QList, obj);
 728             dump_qlist(comp_indent, value);
 729             break;
 730         }
 731         case QTYPE_QBOOL: {
 732             QBool *value = qobject_to(QBool, obj);
 733             qemu_printf("%s", qbool_get_bool(value) ? "true" : "false");
 734             break;
 735         }
 736         default:
 737             abort();
 738     }
 739 }
 740
 741 static void dump_qlist(int indentation, QList *list)
 742 {
 743     const QListEntry *entry;
 744     int i = 0;
 745
 746     for (entry = qlist_first(list); entry; entry = qlist_next(entry), i++) {
 747         QType type = qobject_type(entry->value);
 748         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 749         qemu_printf("%*s[%i]:%c", indentation * 4, "", i,
 750                     composite ? '\n' : ' ');
 751         dump_qobject(indentation + 1, entry->value);
 752         if (!composite) {
 753             qemu_printf("\n");
 754         }
 755     }
 756 }
 757
 758 static void dump_qdict(int indentation, QDict *dict)
 759 {
 760     const QDictEntry *entry;
 761
 762     for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) {
 763         QType type = qobject_type(entry->value);
 764         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 765         char *key = g_malloc(strlen(entry->key) + 1);
 766         int i;
 767
 768         /* replace dashes with spaces in key (variable) names */
 769         for (i = 0; entry->key[i]; i++) {
 770             key[i] = entry->key[i] == '-' ? ' ' : entry->key[i];
 771         }
 772         key[i] = 0;
 773         qemu_printf("%*s%s:%c", indentation * 4, "", key,
 774                     composite ? '\n' : ' ');
 775         dump_qobject(indentation + 1, entry->value);
 776         if (!composite) {
 777             qemu_printf("\n");
 778         }
 779         g_free(key);
 780     }
 781 }
 782
 783 void bdrv_image_info_specific_dump(ImageInfoSpecific *info_spec)
 784 {
 785     QObject *obj, *data;
 786     Visitor *v = qobject_output_visitor_new(&obj);
 787
 788     visit_type_ImageInfoSpecific(v, NULL, &info_spec, &error_abort);
 789     visit_complete(v, &obj);
 790     data = qdict_get(qobject_to(QDict, obj), "data");
 791     dump_qobject(1, data);
 792     qobject_unref(obj);
 793     visit_free(v);
 794 }
 795
 796 void bdrv_image_info_dump(ImageInfo *info)
 797 {
 798     char *size_buf, *dsize_buf;
 799     if (!info->has_actual_size) {
 800         dsize_buf = g_strdup("unavailable");
 801     } else {
 802         dsize_buf = size_to_str(info->actual_size);
 803     }
 804     size_buf = size_to_str(info->virtual_size);
 805     qemu_printf("image: %s\n"
 806                 "file format: %s\n"
 807                 "virtual size: %s (%" PRId64 " bytes)\n"
 808                 "disk size: %s\n",
 809                 info->filename, info->format, size_buf,
 810                 info->virtual_size,
 811                 dsize_buf);
 812     g_free(size_buf);
 813     g_free(dsize_buf);
 814
 815     if (info->has_encrypted && info->encrypted) {
 816         qemu_printf("encrypted: yes\n");
 817     }
 818
 819     if (info->has_cluster_size) {
 820         qemu_printf("cluster_size: %" PRId64 "\n",
 821                     info->cluster_size);
 822     }
 823
 824     if (info->has_dirty_flag && info->dirty_flag) {
 825         qemu_printf("cleanly shut down: no\n");
 826     }
 827
 828     if (info->has_backing_filename) {
 829         qemu_printf("backing file: %s", info->backing_filename);
 830         if (!info->has_full_backing_filename) {
 831             qemu_printf(" (cannot determine actual path)");
 832         } else if (strcmp(info->backing_filename,
 833                           info->full_backing_filename) != 0) {
 834             qemu_printf(" (actual path: %s)", info->full_backing_filename);
 835         }
 836         qemu_printf("\n");
 837         if (info->has_backing_filename_format) {
 838             qemu_printf("backing file format: %s\n",
 839                         info->backing_filename_format);
 840         }
 841     }
 842
 843     if (info->has_snapshots) {
 844         SnapshotInfoList *elem;
 845
 846         qemu_printf("Snapshot list:\n");
 847         bdrv_snapshot_dump(NULL);
 848         qemu_printf("\n");
 849
 850         /* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but
 851          * we convert to the block layer's native QEMUSnapshotInfo for now.
 852          */
 853         for (elem = info->snapshots; elem; elem = elem->next) {
 854             QEMUSnapshotInfo sn = {
 855                 .vm_state_size = elem->value->vm_state_size,
 856                 .date_sec = elem->value->date_sec,
 857                 .date_nsec = elem->value->date_nsec,
 858                 .vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +
 859                                  elem->value->vm_clock_nsec,
 860                 .icount = elem->value->has_icount ?
 861                           elem->value->icount : -1ULL,
 862             };
 863
 864             pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);
 865             pstrcpy(sn.name, sizeof(sn.name), elem->value->name);
 866             bdrv_snapshot_dump(&sn);
 867             qemu_printf("\n");
 868         }
 869     }
 870
 871     if (info->has_format_specific) {
 872         qemu_printf("Format specific information:\n");
 873         bdrv_image_info_specific_dump(info->format_specific);
 874     }
 875 }