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