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