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 "block/qapi.h"
  27 #include "block/block_int.h"
  28 #include "block/throttle-groups.h"
  29 #include "block/write-threshold.h"
  30 #include "qapi/error.h"
  31 #include "qapi/qapi-commands-block-core.h"
  32 #include "qapi/qobject-output-visitor.h"
  33 #include "qapi/qapi-visit-block-core.h"
  34 #include "qapi/qmp/qbool.h"
  35 #include "qapi/qmp/qdict.h"
  36 #include "qapi/qmp/qlist.h"
  37 #include "qapi/qmp/qnum.h"
  38 #include "qapi/qmp/qstring.h"
  39 #include "qemu/qemu-print.h"
  40 #include "sysemu/block-backend.h"
  41 #include "qemu/cutils.h"
  42
  43 BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
  44                                         BlockDriverState *bs, Error **errp)
  45 {
  46     ImageInfo **p_image_info;
  47     BlockDriverState *bs0;
  48     BlockDeviceInfo *info;
  49
  50     if (!bs->drv) {
  51         error_setg(errp, "Block device %s is ejected", bs->node_name);
  52         return NULL;
  53     }
  54
  55     bdrv_refresh_filename(bs);
  56
  57     info = g_malloc0(sizeof(*info));
  58     info->file                   = g_strdup(bs->filename);
  59     info->ro                     = bs->read_only;
  60     info->drv                    = g_strdup(bs->drv->format_name);
  61     info->encrypted              = bs->encrypted;
  62     info->encryption_key_missing = false;
  63
  64     info->cache = g_new(BlockdevCacheInfo, 1);
  65     *info->cache = (BlockdevCacheInfo) {
  66         .writeback      = blk ? blk_enable_write_cache(blk) : true,
  67         .direct         = !!(bs->open_flags & BDRV_O_NOCACHE),
  68         .no_flush       = !!(bs->open_flags & BDRV_O_NO_FLUSH),
  69     };
  70
  71     if (bs->node_name[0]) {
  72         info->has_node_name = true;
  73         info->node_name = g_strdup(bs->node_name);
  74     }
  75
  76     if (bs->backing_file[0]) {
  77         info->has_backing_file = true;
  78         info->backing_file = g_strdup(bs->backing_file);
  79     }
  80
  81     info->detect_zeroes = bs->detect_zeroes;
  82
  83     if (blk && blk_get_public(blk)->throttle_group_member.throttle_state) {
  84         ThrottleConfig cfg;
  85         BlockBackendPublic *blkp = blk_get_public(blk);
  86
  87         throttle_group_get_config(&blkp->throttle_group_member, &cfg);
  88
  89         info->bps     = cfg.buckets[THROTTLE_BPS_TOTAL].avg;
  90         info->bps_rd  = cfg.buckets[THROTTLE_BPS_READ].avg;
  91         info->bps_wr  = cfg.buckets[THROTTLE_BPS_WRITE].avg;
  92
  93         info->iops    = cfg.buckets[THROTTLE_OPS_TOTAL].avg;
  94         info->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg;
  95         info->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg;
  96
  97         info->has_bps_max     = cfg.buckets[THROTTLE_BPS_TOTAL].max;
  98         info->bps_max         = cfg.buckets[THROTTLE_BPS_TOTAL].max;
  99         info->has_bps_rd_max  = cfg.buckets[THROTTLE_BPS_READ].max;
 100         info->bps_rd_max      = cfg.buckets[THROTTLE_BPS_READ].max;
 101         info->has_bps_wr_max  = cfg.buckets[THROTTLE_BPS_WRITE].max;
 102         info->bps_wr_max      = cfg.buckets[THROTTLE_BPS_WRITE].max;
 103
 104         info->has_iops_max    = cfg.buckets[THROTTLE_OPS_TOTAL].max;
 105         info->iops_max        = cfg.buckets[THROTTLE_OPS_TOTAL].max;
 106         info->has_iops_rd_max = cfg.buckets[THROTTLE_OPS_READ].max;
 107         info->iops_rd_max     = cfg.buckets[THROTTLE_OPS_READ].max;
 108         info->has_iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max;
 109         info->iops_wr_max     = cfg.buckets[THROTTLE_OPS_WRITE].max;
 110
 111         info->has_bps_max_length     = info->has_bps_max;
 112         info->bps_max_length         =
 113             cfg.buckets[THROTTLE_BPS_TOTAL].burst_length;
 114         info->has_bps_rd_max_length  = info->has_bps_rd_max;
 115         info->bps_rd_max_length      =
 116             cfg.buckets[THROTTLE_BPS_READ].burst_length;
 117         info->has_bps_wr_max_length  = info->has_bps_wr_max;
 118         info->bps_wr_max_length      =
 119             cfg.buckets[THROTTLE_BPS_WRITE].burst_length;
 120
 121         info->has_iops_max_length    = info->has_iops_max;
 122         info->iops_max_length        =
 123             cfg.buckets[THROTTLE_OPS_TOTAL].burst_length;
 124         info->has_iops_rd_max_length = info->has_iops_rd_max;
 125         info->iops_rd_max_length     =
 126             cfg.buckets[THROTTLE_OPS_READ].burst_length;
 127         info->has_iops_wr_max_length = info->has_iops_wr_max;
 128         info->iops_wr_max_length     =
 129             cfg.buckets[THROTTLE_OPS_WRITE].burst_length;
 130
 131         info->has_iops_size = cfg.op_size;
 132         info->iops_size = cfg.op_size;
 133
 134         info->has_group = true;
 135         info->group =
 136             g_strdup(throttle_group_get_name(&blkp->throttle_group_member));
 137     }
 138
 139     info->write_threshold = bdrv_write_threshold_get(bs);
 140
 141     bs0 = bs;
 142     p_image_info = &info->image;
 143     info->backing_file_depth = 0;
 144     while (1) {
 145         Error *local_err = NULL;
 146         bdrv_query_image_info(bs0, p_image_info, &local_err);
 147         if (local_err) {
 148             error_propagate(errp, local_err);
 149             qapi_free_BlockDeviceInfo(info);
 150             return NULL;
 151         }
 152
 153         if (bs0->drv && bs0->backing) {
 154             info->backing_file_depth++;
 155             bs0 = bs0->backing->bs;
 156             (*p_image_info)->has_backing_image = true;
 157             p_image_info = &((*p_image_info)->backing_image);
 158         } else {
 159             break;
 160         }
 161
 162         /* Skip automatically inserted nodes that the user isn't aware of for
 163          * query-block (blk != NULL), but not for query-named-block-nodes */
 164         while (blk && bs0->drv && bs0->implicit) {
 165             bs0 = backing_bs(bs0);
 166             assert(bs0);
 167         }
 168     }
 169
 170     return info;
 171 }
 172
 173 /*
 174  * Returns 0 on success, with *p_list either set to describe snapshot
 175  * information, or NULL because there are no snapshots.  Returns -errno on
 176  * error, with *p_list untouched.
 177  */
 178 int bdrv_query_snapshot_info_list(BlockDriverState *bs,
 179                                   SnapshotInfoList **p_list,
 180                                   Error **errp)
 181 {
 182     int i, sn_count;
 183     QEMUSnapshotInfo *sn_tab = NULL;
 184     SnapshotInfoList *info_list, *cur_item = NULL, *head = NULL;
 185     SnapshotInfo *info;
 186
 187     sn_count = bdrv_snapshot_list(bs, &sn_tab);
 188     if (sn_count < 0) {
 189         const char *dev = bdrv_get_device_name(bs);
 190         switch (sn_count) {
 191         case -ENOMEDIUM:
 192             error_setg(errp, "Device '%s' is not inserted", dev);
 193             break;
 194         case -ENOTSUP:
 195             error_setg(errp,
 196                        "Device '%s' does not support internal snapshots",
 197                        dev);
 198             break;
 199         default:
 200             error_setg_errno(errp, -sn_count,
 201                              "Can't list snapshots of device '%s'", dev);
 202             break;
 203         }
 204         return sn_count;
 205     }
 206
 207     for (i = 0; i < sn_count; i++) {
 208         info = g_new0(SnapshotInfo, 1);
 209         info->id            = g_strdup(sn_tab[i].id_str);
 210         info->name          = g_strdup(sn_tab[i].name);
 211         info->vm_state_size = sn_tab[i].vm_state_size;
 212         info->date_sec      = sn_tab[i].date_sec;
 213         info->date_nsec     = sn_tab[i].date_nsec;
 214         info->vm_clock_sec  = sn_tab[i].vm_clock_nsec / 1000000000;
 215         info->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
 216
 217         info_list = g_new0(SnapshotInfoList, 1);
 218         info_list->value = info;
 219
 220         /* XXX: waiting for the qapi to support qemu-queue.h types */
 221         if (!cur_item) {
 222             head = cur_item = info_list;
 223         } else {
 224             cur_item->next = info_list;
 225             cur_item = info_list;
 226         }
 227
 228     }
 229
 230     g_free(sn_tab);
 231     *p_list = head;
 232     return 0;
 233 }
 234
 235 /**
 236  * bdrv_query_image_info:
 237  * @bs: block device to examine
 238  * @p_info: location to store image information
 239  * @errp: location to store error information
 240  *
 241  * Store "flat" image information in @p_info.
 242  *
 243  * "Flat" means it does *not* query backing image information,
 244  * i.e. (*pinfo)->has_backing_image will be set to false and
 245  * (*pinfo)->backing_image to NULL even when the image does in fact have
 246  * a backing image.
 247  *
 248  * @p_info will be set only on success. On error, store error in @errp.
 249  */
 250 void bdrv_query_image_info(BlockDriverState *bs,
 251                            ImageInfo **p_info,
 252                            Error **errp)
 253 {
 254     int64_t size;
 255     const char *backing_filename;
 256     BlockDriverInfo bdi;
 257     int ret;
 258     Error *err = NULL;
 259     ImageInfo *info;
 260
 261     aio_context_acquire(bdrv_get_aio_context(bs));
 262
 263     size = bdrv_getlength(bs);
 264     if (size < 0) {
 265         error_setg_errno(errp, -size, "Can't get image size '%s'",
 266                          bs->exact_filename);
 267         goto out;
 268     }
 269
 270     bdrv_refresh_filename(bs);
 271
 272     info = g_new0(ImageInfo, 1);
 273     info->filename        = g_strdup(bs->filename);
 274     info->format          = g_strdup(bdrv_get_format_name(bs));
 275     info->virtual_size    = size;
 276     info->actual_size     = bdrv_get_allocated_file_size(bs);
 277     info->has_actual_size = info->actual_size >= 0;
 278     if (bdrv_is_encrypted(bs)) {
 279         info->encrypted = true;
 280         info->has_encrypted = true;
 281     }
 282     if (bdrv_get_info(bs, &bdi) >= 0) {
 283         if (bdi.cluster_size != 0) {
 284             info->cluster_size = bdi.cluster_size;
 285             info->has_cluster_size = true;
 286         }
 287         info->dirty_flag = bdi.is_dirty;
 288         info->has_dirty_flag = true;
 289     }
 290     info->format_specific = bdrv_get_specific_info(bs, &err);
 291     if (err) {
 292         error_propagate(errp, err);
 293         qapi_free_ImageInfo(info);
 294         goto out;
 295     }
 296     info->has_format_specific = info->format_specific != NULL;
 297
 298     backing_filename = bs->backing_file;
 299     if (backing_filename[0] != '\0') {
 300         char *backing_filename2;
 301         info->backing_filename = g_strdup(backing_filename);
 302         info->has_backing_filename = true;
 303         backing_filename2 = bdrv_get_full_backing_filename(bs, NULL);
 304
 305         /* Always report the full_backing_filename if present, even if it's the
 306          * same as backing_filename. That they are same is useful info. */
 307         if (backing_filename2) {
 308             info->full_backing_filename = g_strdup(backing_filename2);
 309             info->has_full_backing_filename = true;
 310         }
 311
 312         if (bs->backing_format[0]) {
 313             info->backing_filename_format = g_strdup(bs->backing_format);
 314             info->has_backing_filename_format = true;
 315         }
 316         g_free(backing_filename2);
 317     }
 318
 319     ret = bdrv_query_snapshot_info_list(bs, &info->snapshots, &err);
 320     switch (ret) {
 321     case 0:
 322         if (info->snapshots) {
 323             info->has_snapshots = true;
 324         }
 325         break;
 326     /* recoverable error */
 327     case -ENOMEDIUM:
 328     case -ENOTSUP:
 329         error_free(err);
 330         break;
 331     default:
 332         error_propagate(errp, err);
 333         qapi_free_ImageInfo(info);
 334         goto out;
 335     }
 336
 337     *p_info = info;
 338
 339 out:
 340     aio_context_release(bdrv_get_aio_context(bs));
 341 }
 342
 343 /* @p_info will be set only on success. */
 344 static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
 345                             Error **errp)
 346 {
 347     BlockInfo *info = g_malloc0(sizeof(*info));
 348     BlockDriverState *bs = blk_bs(blk);
 349     char *qdev;
 350
 351     /* Skip automatically inserted nodes that the user isn't aware of */
 352     while (bs && bs->drv && bs->implicit) {
 353         bs = backing_bs(bs);
 354     }
 355
 356     info->device = g_strdup(blk_name(blk));
 357     info->type = g_strdup("unknown");
 358     info->locked = blk_dev_is_medium_locked(blk);
 359     info->removable = blk_dev_has_removable_media(blk);
 360
 361     qdev = blk_get_attached_dev_id(blk);
 362     if (qdev && *qdev) {
 363         info->has_qdev = true;
 364         info->qdev = qdev;
 365     } else {
 366         g_free(qdev);
 367     }
 368
 369     if (blk_dev_has_tray(blk)) {
 370         info->has_tray_open = true;
 371         info->tray_open = blk_dev_is_tray_open(blk);
 372     }
 373
 374     if (blk_iostatus_is_enabled(blk)) {
 375         info->has_io_status = true;
 376         info->io_status = blk_iostatus(blk);
 377     }
 378
 379     if (bs && !QLIST_EMPTY(&bs->dirty_bitmaps)) {
 380         info->has_dirty_bitmaps = true;
 381         info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
 382     }
 383
 384     if (bs && bs->drv) {
 385         info->has_inserted = true;
 386         info->inserted = bdrv_block_device_info(blk, bs, errp);
 387         if (info->inserted == NULL) {
 388             goto err;
 389         }
 390     }
 391
 392     *p_info = info;
 393     return;
 394
 395  err:
 396     qapi_free_BlockInfo(info);
 397 }
 398
 399 static uint64List *uint64_list(uint64_t *list, int size)
 400 {
 401     int i;
 402     uint64List *out_list = NULL;
 403     uint64List **pout_list = &out_list;
 404
 405     for (i = 0; i < size; i++) {
 406         uint64List *entry = g_new(uint64List, 1);
 407         entry->value = list[i];
 408         *pout_list = entry;
 409         pout_list = &entry->next;
 410     }
 411
 412     *pout_list = NULL;
 413
 414     return out_list;
 415 }
 416
 417 static void bdrv_latency_histogram_stats(BlockLatencyHistogram *hist,
 418                                          bool *not_null,
 419                                          BlockLatencyHistogramInfo **info)
 420 {
 421     *not_null = hist->bins != NULL;
 422     if (*not_null) {
 423         *info = g_new0(BlockLatencyHistogramInfo, 1);
 424
 425         (*info)->boundaries = uint64_list(hist->boundaries, hist->nbins - 1);
 426         (*info)->bins = uint64_list(hist->bins, hist->nbins);
 427     }
 428 }
 429
 430 static void bdrv_query_blk_stats(BlockDeviceStats *ds, BlockBackend *blk)
 431 {
 432     BlockAcctStats *stats = blk_get_stats(blk);
 433     BlockAcctTimedStats *ts = NULL;
 434
 435     ds->rd_bytes = stats->nr_bytes[BLOCK_ACCT_READ];
 436     ds->wr_bytes = stats->nr_bytes[BLOCK_ACCT_WRITE];
 437     ds->rd_operations = stats->nr_ops[BLOCK_ACCT_READ];
 438     ds->wr_operations = stats->nr_ops[BLOCK_ACCT_WRITE];
 439
 440     ds->failed_rd_operations = stats->failed_ops[BLOCK_ACCT_READ];
 441     ds->failed_wr_operations = stats->failed_ops[BLOCK_ACCT_WRITE];
 442     ds->failed_flush_operations = stats->failed_ops[BLOCK_ACCT_FLUSH];
 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
 449     ds->rd_merged = stats->merged[BLOCK_ACCT_READ];
 450     ds->wr_merged = stats->merged[BLOCK_ACCT_WRITE];
 451     ds->flush_operations = stats->nr_ops[BLOCK_ACCT_FLUSH];
 452     ds->wr_total_time_ns = stats->total_time_ns[BLOCK_ACCT_WRITE];
 453     ds->rd_total_time_ns = stats->total_time_ns[BLOCK_ACCT_READ];
 454     ds->flush_total_time_ns = stats->total_time_ns[BLOCK_ACCT_FLUSH];
 455
 456     ds->has_idle_time_ns = stats->last_access_time_ns > 0;
 457     if (ds->has_idle_time_ns) {
 458         ds->idle_time_ns = block_acct_idle_time_ns(stats);
 459     }
 460
 461     ds->account_invalid = stats->account_invalid;
 462     ds->account_failed = stats->account_failed;
 463
 464     while ((ts = block_acct_interval_next(stats, ts))) {
 465         BlockDeviceTimedStatsList *timed_stats =
 466             g_malloc0(sizeof(*timed_stats));
 467         BlockDeviceTimedStats *dev_stats = g_malloc0(sizeof(*dev_stats));
 468         timed_stats->next = ds->timed_stats;
 469         timed_stats->value = dev_stats;
 470         ds->timed_stats = timed_stats;
 471
 472         TimedAverage *rd = &ts->latency[BLOCK_ACCT_READ];
 473         TimedAverage *wr = &ts->latency[BLOCK_ACCT_WRITE];
 474         TimedAverage *fl = &ts->latency[BLOCK_ACCT_FLUSH];
 475
 476         dev_stats->interval_length = ts->interval_length;
 477
 478         dev_stats->min_rd_latency_ns = timed_average_min(rd);
 479         dev_stats->max_rd_latency_ns = timed_average_max(rd);
 480         dev_stats->avg_rd_latency_ns = timed_average_avg(rd);
 481
 482         dev_stats->min_wr_latency_ns = timed_average_min(wr);
 483         dev_stats->max_wr_latency_ns = timed_average_max(wr);
 484         dev_stats->avg_wr_latency_ns = timed_average_avg(wr);
 485
 486         dev_stats->min_flush_latency_ns = timed_average_min(fl);
 487         dev_stats->max_flush_latency_ns = timed_average_max(fl);
 488         dev_stats->avg_flush_latency_ns = timed_average_avg(fl);
 489
 490         dev_stats->avg_rd_queue_depth =
 491             block_acct_queue_depth(ts, BLOCK_ACCT_READ);
 492         dev_stats->avg_wr_queue_depth =
 493             block_acct_queue_depth(ts, BLOCK_ACCT_WRITE);
 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     BlockStats *s = NULL;
 511
 512     s = g_malloc0(sizeof(*s));
 513     s->stats = g_malloc0(sizeof(*s->stats));
 514
 515     if (!bs) {
 516         return s;
 517     }
 518
 519     /* Skip automatically inserted nodes that the user isn't aware of in
 520      * a BlockBackend-level command. Stay at the exact node for a node-level
 521      * command. */
 522     while (blk_level && bs->drv && bs->implicit) {
 523         bs = backing_bs(bs);
 524         assert(bs);
 525     }
 526
 527     if (bdrv_get_node_name(bs)[0]) {
 528         s->has_node_name = true;
 529         s->node_name = g_strdup(bdrv_get_node_name(bs));
 530     }
 531
 532     s->stats->wr_highest_offset = stat64_get(&bs->wr_highest_offset);
 533
 534     if (bs->file) {
 535         s->has_parent = true;
 536         s->parent = bdrv_query_bds_stats(bs->file->bs, blk_level);
 537     }
 538
 539     if (blk_level && bs->backing) {
 540         s->has_backing = true;
 541         s->backing = bdrv_query_bds_stats(bs->backing->bs, blk_level);
 542     }
 543
 544     return s;
 545 }
 546
 547 BlockInfoList *qmp_query_block(Error **errp)
 548 {
 549     BlockInfoList *head = NULL, **p_next = &head;
 550     BlockBackend *blk;
 551     Error *local_err = NULL;
 552
 553     for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
 554         BlockInfoList *info;
 555
 556         if (!*blk_name(blk) && !blk_get_attached_dev(blk)) {
 557             continue;
 558         }
 559
 560         info = g_malloc0(sizeof(*info));
 561         bdrv_query_info(blk, &info->value, &local_err);
 562         if (local_err) {
 563             error_propagate(errp, local_err);
 564             g_free(info);
 565             qapi_free_BlockInfoList(head);
 566             return NULL;
 567         }
 568
 569         *p_next = info;
 570         p_next = &info->next;
 571     }
 572
 573     return head;
 574 }
 575
 576 BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
 577                                      bool query_nodes,
 578                                      Error **errp)
 579 {
 580     BlockStatsList *head = NULL, **p_next = &head;
 581     BlockBackend *blk;
 582     BlockDriverState *bs;
 583
 584     /* Just to be safe if query_nodes is not always initialized */
 585     if (has_query_nodes && query_nodes) {
 586         for (bs = bdrv_next_node(NULL); bs; bs = bdrv_next_node(bs)) {
 587             BlockStatsList *info = g_malloc0(sizeof(*info));
 588             AioContext *ctx = bdrv_get_aio_context(bs);
 589
 590             aio_context_acquire(ctx);
 591             info->value = bdrv_query_bds_stats(bs, false);
 592             aio_context_release(ctx);
 593
 594             *p_next = info;
 595             p_next = &info->next;
 596         }
 597     } else {
 598         for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
 599             BlockStatsList *info;
 600             AioContext *ctx = blk_get_aio_context(blk);
 601             BlockStats *s;
 602             char *qdev;
 603
 604             if (!*blk_name(blk) && !blk_get_attached_dev(blk)) {
 605                 continue;
 606             }
 607
 608             aio_context_acquire(ctx);
 609             s = bdrv_query_bds_stats(blk_bs(blk), true);
 610             s->has_device = true;
 611             s->device = g_strdup(blk_name(blk));
 612
 613             qdev = blk_get_attached_dev_id(blk);
 614             if (qdev && *qdev) {
 615                 s->has_qdev = true;
 616                 s->qdev = qdev;
 617             } else {
 618                 g_free(qdev);
 619             }
 620
 621             bdrv_query_blk_stats(s->stats, blk);
 622             aio_context_release(ctx);
 623
 624             info = g_malloc0(sizeof(*info));
 625             info->value = s;
 626             *p_next = info;
 627             p_next = &info->next;
 628         }
 629     }
 630
 631     return head;
 632 }
 633
 634 #define NB_SUFFIXES 4
 635
 636 static char *get_human_readable_size(char *buf, int buf_size, int64_t size)
 637 {
 638     static const char suffixes[NB_SUFFIXES] = {'K', 'M', 'G', 'T'};
 639     int64_t base;
 640     int i;
 641
 642     if (size <= 999) {
 643         snprintf(buf, buf_size, "%" PRId64, size);
 644     } else {
 645         base = 1024;
 646         for (i = 0; i < NB_SUFFIXES; i++) {
 647             if (size < (10 * base)) {
 648                 snprintf(buf, buf_size, "%0.1f%c",
 649                          (double)size / base,
 650                          suffixes[i]);
 651                 break;
 652             } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) {
 653                 snprintf(buf, buf_size, "%" PRId64 "%c",
 654                          ((size + (base >> 1)) / base),
 655                          suffixes[i]);
 656                 break;
 657             }
 658             base = base * 1024;
 659         }
 660     }
 661     return buf;
 662 }
 663
 664 void bdrv_snapshot_dump(QEMUSnapshotInfo *sn)
 665 {
 666     char buf1[128], date_buf[128], clock_buf[128];
 667     struct tm tm;
 668     time_t ti;
 669     int64_t secs;
 670
 671     if (!sn) {
 672         qemu_printf("%-10s%-20s%7s%20s%15s",
 673                     "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK");
 674     } else {
 675         ti = sn->date_sec;
 676         localtime_r(&ti, &tm);
 677         strftime(date_buf, sizeof(date_buf),
 678                  "%Y-%m-%d %H:%M:%S", &tm);
 679         secs = sn->vm_clock_nsec / 1000000000;
 680         snprintf(clock_buf, sizeof(clock_buf),
 681                  "%02d:%02d:%02d.%03d",
 682                  (int)(secs / 3600),
 683                  (int)((secs / 60) % 60),
 684                  (int)(secs % 60),
 685                  (int)((sn->vm_clock_nsec / 1000000) % 1000));
 686         qemu_printf("%-10s%-20s%7s%20s%15s",
 687                     sn->id_str, sn->name,
 688                     get_human_readable_size(buf1, sizeof(buf1),
 689                                             sn->vm_state_size),
 690                     date_buf,
 691                     clock_buf);
 692     }
 693 }
 694
 695 static void dump_qdict(int indentation, QDict *dict);
 696 static void dump_qlist(int indentation, QList *list);
 697
 698 static void dump_qobject(int comp_indent, QObject *obj)
 699 {
 700     switch (qobject_type(obj)) {
 701         case QTYPE_QNUM: {
 702             QNum *value = qobject_to(QNum, obj);
 703             char *tmp = qnum_to_string(value);
 704             qemu_printf("%s", tmp);
 705             g_free(tmp);
 706             break;
 707         }
 708         case QTYPE_QSTRING: {
 709             QString *value = qobject_to(QString, obj);
 710             qemu_printf("%s", qstring_get_str(value));
 711             break;
 712         }
 713         case QTYPE_QDICT: {
 714             QDict *value = qobject_to(QDict, obj);
 715             dump_qdict(comp_indent, value);
 716             break;
 717         }
 718         case QTYPE_QLIST: {
 719             QList *value = qobject_to(QList, obj);
 720             dump_qlist(comp_indent, value);
 721             break;
 722         }
 723         case QTYPE_QBOOL: {
 724             QBool *value = qobject_to(QBool, obj);
 725             qemu_printf("%s", qbool_get_bool(value) ? "true" : "false");
 726             break;
 727         }
 728         default:
 729             abort();
 730     }
 731 }
 732
 733 static void dump_qlist(int indentation, QList *list)
 734 {
 735     const QListEntry *entry;
 736     int i = 0;
 737
 738     for (entry = qlist_first(list); entry; entry = qlist_next(entry), i++) {
 739         QType type = qobject_type(entry->value);
 740         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 741         qemu_printf("%*s[%i]:%c", indentation * 4, "", i,
 742                     composite ? '\n' : ' ');
 743         dump_qobject(indentation + 1, entry->value);
 744         if (!composite) {
 745             qemu_printf("\n");
 746         }
 747     }
 748 }
 749
 750 static void dump_qdict(int indentation, QDict *dict)
 751 {
 752     const QDictEntry *entry;
 753
 754     for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) {
 755         QType type = qobject_type(entry->value);
 756         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 757         char *key = g_malloc(strlen(entry->key) + 1);
 758         int i;
 759
 760         /* replace dashes with spaces in key (variable) names */
 761         for (i = 0; entry->key[i]; i++) {
 762             key[i] = entry->key[i] == '-' ? ' ' : entry->key[i];
 763         }
 764         key[i] = 0;
 765         qemu_printf("%*s%s:%c", indentation * 4, "", key,
 766                     composite ? '\n' : ' ');
 767         dump_qobject(indentation + 1, entry->value);
 768         if (!composite) {
 769             qemu_printf("\n");
 770         }
 771         g_free(key);
 772     }
 773 }
 774
 775 void bdrv_image_info_specific_dump(ImageInfoSpecific *info_spec)
 776 {
 777     QObject *obj, *data;
 778     Visitor *v = qobject_output_visitor_new(&obj);
 779
 780     visit_type_ImageInfoSpecific(v, NULL, &info_spec, &error_abort);
 781     visit_complete(v, &obj);
 782     data = qdict_get(qobject_to(QDict, obj), "data");
 783     dump_qobject(1, data);
 784     qobject_unref(obj);
 785     visit_free(v);
 786 }
 787
 788 void bdrv_image_info_dump(ImageInfo *info)
 789 {
 790     char size_buf[128], dsize_buf[128];
 791     if (!info->has_actual_size) {
 792         snprintf(dsize_buf, sizeof(dsize_buf), "unavailable");
 793     } else {
 794         get_human_readable_size(dsize_buf, sizeof(dsize_buf),
 795                                 info->actual_size);
 796     }
 797     get_human_readable_size(size_buf, sizeof(size_buf), info->virtual_size);
 798     qemu_printf("image: %s\n"
 799                 "file format: %s\n"
 800                 "virtual size: %s (%" PRId64 " bytes)\n"
 801                 "disk size: %s\n",
 802                 info->filename, info->format, size_buf,
 803                 info->virtual_size,
 804                 dsize_buf);
 805
 806     if (info->has_encrypted && info->encrypted) {
 807         qemu_printf("encrypted: yes\n");
 808     }
 809
 810     if (info->has_cluster_size) {
 811         qemu_printf("cluster_size: %" PRId64 "\n",
 812                     info->cluster_size);
 813     }
 814
 815     if (info->has_dirty_flag && info->dirty_flag) {
 816         qemu_printf("cleanly shut down: no\n");
 817     }
 818
 819     if (info->has_backing_filename) {
 820         qemu_printf("backing file: %s", info->backing_filename);
 821         if (!info->has_full_backing_filename) {
 822             qemu_printf(" (cannot determine actual path)");
 823         } else if (strcmp(info->backing_filename,
 824                           info->full_backing_filename) != 0) {
 825             qemu_printf(" (actual path: %s)", info->full_backing_filename);
 826         }
 827         qemu_printf("\n");
 828         if (info->has_backing_filename_format) {
 829             qemu_printf("backing file format: %s\n",
 830                         info->backing_filename_format);
 831         }
 832     }
 833
 834     if (info->has_snapshots) {
 835         SnapshotInfoList *elem;
 836
 837         qemu_printf("Snapshot list:\n");
 838         bdrv_snapshot_dump(NULL);
 839         qemu_printf("\n");
 840
 841         /* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but
 842          * we convert to the block layer's native QEMUSnapshotInfo for now.
 843          */
 844         for (elem = info->snapshots; elem; elem = elem->next) {
 845             QEMUSnapshotInfo sn = {
 846                 .vm_state_size = elem->value->vm_state_size,
 847                 .date_sec = elem->value->date_sec,
 848                 .date_nsec = elem->value->date_nsec,
 849                 .vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +
 850                                  elem->value->vm_clock_nsec,
 851             };
 852
 853             pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);
 854             pstrcpy(sn.name, sizeof(sn.name), elem->value->name);
 855             bdrv_snapshot_dump(&sn);
 856             qemu_printf("\n");
 857         }
 858     }
 859
 860     if (info->has_format_specific) {
 861         qemu_printf("Format specific information:\n");
 862         bdrv_image_info_specific_dump(info->format_specific);
 863     }
 864 }