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 "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 "sysemu/block-backend.h"
  40#include "qemu/cutils.h"
  41
  42BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
  43                                        BlockDriverState *bs, Error **errp)
  44{
  45    ImageInfo **p_image_info;
  46    BlockDriverState *bs0;
  47    BlockDeviceInfo *info;
  48
  49    if (!bs->drv) {
  50        error_setg(errp, "Block device %s is ejected", bs->node_name);
  51        return NULL;
  52    }
  53
  54    info = g_malloc0(sizeof(*info));
  55    info->file                   = g_strdup(bs->filename);
  56    info->ro                     = bs->read_only;
  57    info->drv                    = g_strdup(bs->drv->format_name);
  58    info->encrypted              = bs->encrypted;
  59    info->encryption_key_missing = false;
  60
  61    info->cache = g_new(BlockdevCacheInfo, 1);
  62    *info->cache = (BlockdevCacheInfo) {
  63        .writeback      = blk ? blk_enable_write_cache(blk) : true,
  64        .direct         = !!(bs->open_flags & BDRV_O_NOCACHE),
  65        .no_flush       = !!(bs->open_flags & BDRV_O_NO_FLUSH),
  66    };
  67
  68    if (bs->node_name[0]) {
  69        info->has_node_name = true;
  70        info->node_name = g_strdup(bs->node_name);
  71    }
  72
  73    if (bs->backing_file[0]) {
  74        info->has_backing_file = true;
  75        info->backing_file = g_strdup(bs->backing_file);
  76    }
  77
  78    info->detect_zeroes = bs->detect_zeroes;
  79
  80    if (blk && blk_get_public(blk)->throttle_group_member.throttle_state) {
  81        ThrottleConfig cfg;
  82        BlockBackendPublic *blkp = blk_get_public(blk);
  83
  84        throttle_group_get_config(&blkp->throttle_group_member, &cfg);
  85
  86        info->bps     = cfg.buckets[THROTTLE_BPS_TOTAL].avg;
  87        info->bps_rd  = cfg.buckets[THROTTLE_BPS_READ].avg;
  88        info->bps_wr  = cfg.buckets[THROTTLE_BPS_WRITE].avg;
  89
  90        info->iops    = cfg.buckets[THROTTLE_OPS_TOTAL].avg;
  91        info->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg;
  92        info->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg;
  93
  94        info->has_bps_max     = cfg.buckets[THROTTLE_BPS_TOTAL].max;
  95        info->bps_max         = cfg.buckets[THROTTLE_BPS_TOTAL].max;
  96        info->has_bps_rd_max  = cfg.buckets[THROTTLE_BPS_READ].max;
  97        info->bps_rd_max      = cfg.buckets[THROTTLE_BPS_READ].max;
  98        info->has_bps_wr_max  = cfg.buckets[THROTTLE_BPS_WRITE].max;
  99        info->bps_wr_max      = cfg.buckets[THROTTLE_BPS_WRITE].max;
 100
 101        info->has_iops_max    = cfg.buckets[THROTTLE_OPS_TOTAL].max;
 102        info->iops_max        = cfg.buckets[THROTTLE_OPS_TOTAL].max;
 103        info->has_iops_rd_max = cfg.buckets[THROTTLE_OPS_READ].max;
 104        info->iops_rd_max     = cfg.buckets[THROTTLE_OPS_READ].max;
 105        info->has_iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max;
 106        info->iops_wr_max     = cfg.buckets[THROTTLE_OPS_WRITE].max;
 107
 108        info->has_bps_max_length     = info->has_bps_max;
 109        info->bps_max_length         =
 110            cfg.buckets[THROTTLE_BPS_TOTAL].burst_length;
 111        info->has_bps_rd_max_length  = info->has_bps_rd_max;
 112        info->bps_rd_max_length      =
 113            cfg.buckets[THROTTLE_BPS_READ].burst_length;
 114        info->has_bps_wr_max_length  = info->has_bps_wr_max;
 115        info->bps_wr_max_length      =
 116            cfg.buckets[THROTTLE_BPS_WRITE].burst_length;
 117
 118        info->has_iops_max_length    = info->has_iops_max;
 119        info->iops_max_length        =
 120            cfg.buckets[THROTTLE_OPS_TOTAL].burst_length;
 121        info->has_iops_rd_max_length = info->has_iops_rd_max;
 122        info->iops_rd_max_length     =
 123            cfg.buckets[THROTTLE_OPS_READ].burst_length;
 124        info->has_iops_wr_max_length = info->has_iops_wr_max;
 125        info->iops_wr_max_length     =
 126            cfg.buckets[THROTTLE_OPS_WRITE].burst_length;
 127
 128        info->has_iops_size = cfg.op_size;
 129        info->iops_size = cfg.op_size;
 130
 131        info->has_group = true;
 132        info->group =
 133            g_strdup(throttle_group_get_name(&blkp->throttle_group_member));
 134    }
 135
 136    info->write_threshold = bdrv_write_threshold_get(bs);
 137
 138    bs0 = bs;
 139    p_image_info = &info->image;
 140    info->backing_file_depth = 0;
 141    while (1) {
 142        Error *local_err = NULL;
 143        bdrv_query_image_info(bs0, p_image_info, &local_err);
 144        if (local_err) {
 145            error_propagate(errp, local_err);
 146            qapi_free_BlockDeviceInfo(info);
 147            return NULL;
 148        }
 149
 150        if (bs0->drv && bs0->backing) {
 151            info->backing_file_depth++;
 152            bs0 = bs0->backing->bs;
 153            (*p_image_info)->has_backing_image = true;
 154            p_image_info = &((*p_image_info)->backing_image);
 155        } else {
 156            break;
 157        }
 158
 159        /* Skip automatically inserted nodes that the user isn't aware of for
 160         * query-block (blk != NULL), but not for query-named-block-nodes */
 161        while (blk && bs0->drv && bs0->implicit) {
 162            bs0 = backing_bs(bs0);
 163            assert(bs0);
 164        }
 165    }
 166
 167    return info;
 168}
 169
 170/*
 171 * Returns 0 on success, with *p_list either set to describe snapshot
 172 * information, or NULL because there are no snapshots.  Returns -errno on
 173 * error, with *p_list untouched.
 174 */
 175int bdrv_query_snapshot_info_list(BlockDriverState *bs,
 176                                  SnapshotInfoList **p_list,
 177                                  Error **errp)
 178{
 179    int i, sn_count;
 180    QEMUSnapshotInfo *sn_tab = NULL;
 181    SnapshotInfoList *info_list, *cur_item = NULL, *head = NULL;
 182    SnapshotInfo *info;
 183
 184    sn_count = bdrv_snapshot_list(bs, &sn_tab);
 185    if (sn_count < 0) {
 186        const char *dev = bdrv_get_device_name(bs);
 187        switch (sn_count) {
 188        case -ENOMEDIUM:
 189            error_setg(errp, "Device '%s' is not inserted", dev);
 190            break;
 191        case -ENOTSUP:
 192            error_setg(errp,
 193                       "Device '%s' does not support internal snapshots",
 194                       dev);
 195            break;
 196        default:
 197            error_setg_errno(errp, -sn_count,
 198                             "Can't list snapshots of device '%s'", dev);
 199            break;
 200        }
 201        return sn_count;
 202    }
 203
 204    for (i = 0; i < sn_count; i++) {
 205        info = g_new0(SnapshotInfo, 1);
 206        info->id            = g_strdup(sn_tab[i].id_str);
 207        info->name          = g_strdup(sn_tab[i].name);
 208        info->vm_state_size = sn_tab[i].vm_state_size;
 209        info->date_sec      = sn_tab[i].date_sec;
 210        info->date_nsec     = sn_tab[i].date_nsec;
 211        info->vm_clock_sec  = sn_tab[i].vm_clock_nsec / 1000000000;
 212        info->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
 213
 214        info_list = g_new0(SnapshotInfoList, 1);
 215        info_list->value = info;
 216
 217        /* XXX: waiting for the qapi to support qemu-queue.h types */
 218        if (!cur_item) {
 219            head = cur_item = info_list;
 220        } else {
 221            cur_item->next = info_list;
 222            cur_item = info_list;
 223        }
 224
 225    }
 226
 227    g_free(sn_tab);
 228    *p_list = head;
 229    return 0;
 230}
 231
 232/**
 233 * bdrv_query_image_info:
 234 * @bs: block device to examine
 235 * @p_info: location to store image information
 236 * @errp: location to store error information
 237 *
 238 * Store "flat" image information in @p_info.
 239 *
 240 * "Flat" means it does *not* query backing image information,
 241 * i.e. (*pinfo)->has_backing_image will be set to false and
 242 * (*pinfo)->backing_image to NULL even when the image does in fact have
 243 * a backing image.
 244 *
 245 * @p_info will be set only on success. On error, store error in @errp.
 246 */
 247void bdrv_query_image_info(BlockDriverState *bs,
 248                           ImageInfo **p_info,
 249                           Error **errp)
 250{
 251    int64_t size;
 252    const char *backing_filename;
 253    BlockDriverInfo bdi;
 254    int ret;
 255    Error *err = NULL;
 256    ImageInfo *info;
 257
 258    aio_context_acquire(bdrv_get_aio_context(bs));
 259
 260    size = bdrv_getlength(bs);
 261    if (size < 0) {
 262        error_setg_errno(errp, -size, "Can't get image size '%s'",
 263                         bs->exact_filename);
 264        goto out;
 265    }
 266
 267    info = g_new0(ImageInfo, 1);
 268    info->filename        = g_strdup(bs->filename);
 269    info->format          = g_strdup(bdrv_get_format_name(bs));
 270    info->virtual_size    = size;
 271    info->actual_size     = bdrv_get_allocated_file_size(bs);
 272    info->has_actual_size = info->actual_size >= 0;
 273    if (bdrv_is_encrypted(bs)) {
 274        info->encrypted = true;
 275        info->has_encrypted = true;
 276    }
 277    if (bdrv_get_info(bs, &bdi) >= 0) {
 278        if (bdi.cluster_size != 0) {
 279            info->cluster_size = bdi.cluster_size;
 280            info->has_cluster_size = true;
 281        }
 282        info->dirty_flag = bdi.is_dirty;
 283        info->has_dirty_flag = true;
 284    }
 285    info->format_specific     = bdrv_get_specific_info(bs);
 286    info->has_format_specific = info->format_specific != NULL;
 287
 288    backing_filename = bs->backing_file;
 289    if (backing_filename[0] != '\0') {
 290        char *backing_filename2 = g_malloc0(PATH_MAX);
 291        info->backing_filename = g_strdup(backing_filename);
 292        info->has_backing_filename = true;
 293        bdrv_get_full_backing_filename(bs, backing_filename2, PATH_MAX, &err);
 294        if (err) {
 295            /* Can't reconstruct the full backing filename, so we must omit
 296             * this field and apply a Best Effort to this query. */
 297            g_free(backing_filename2);
 298            backing_filename2 = NULL;
 299            error_free(err);
 300            err = NULL;
 301        }
 302
 303        /* Always report the full_backing_filename if present, even if it's the
 304         * same as backing_filename. That they are same is useful info. */
 305        if (backing_filename2) {
 306            info->full_backing_filename = g_strdup(backing_filename2);
 307            info->has_full_backing_filename = true;
 308        }
 309
 310        if (bs->backing_format[0]) {
 311            info->backing_filename_format = g_strdup(bs->backing_format);
 312            info->has_backing_filename_format = true;
 313        }
 314        g_free(backing_filename2);
 315    }
 316
 317    ret = bdrv_query_snapshot_info_list(bs, &info->snapshots, &err);
 318    switch (ret) {
 319    case 0:
 320        if (info->snapshots) {
 321            info->has_snapshots = true;
 322        }
 323        break;
 324    /* recoverable error */
 325    case -ENOMEDIUM:
 326    case -ENOTSUP:
 327        error_free(err);
 328        break;
 329    default:
 330        error_propagate(errp, err);
 331        qapi_free_ImageInfo(info);
 332        goto out;
 333    }
 334
 335    *p_info = info;
 336
 337out:
 338    aio_context_release(bdrv_get_aio_context(bs));
 339}
 340
 341/* @p_info will be set only on success. */
 342static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
 343                            Error **errp)
 344{
 345    BlockInfo *info = g_malloc0(sizeof(*info));
 346    BlockDriverState *bs = blk_bs(blk);
 347    char *qdev;
 348
 349    /* Skip automatically inserted nodes that the user isn't aware of */
 350    while (bs && bs->drv && bs->implicit) {
 351        bs = backing_bs(bs);
 352    }
 353
 354    info->device = g_strdup(blk_name(blk));
 355    info->type = g_strdup("unknown");
 356    info->locked = blk_dev_is_medium_locked(blk);
 357    info->removable = blk_dev_has_removable_media(blk);
 358
 359    qdev = blk_get_attached_dev_id(blk);
 360    if (qdev && *qdev) {
 361        info->has_qdev = true;
 362        info->qdev = qdev;
 363    } else {
 364        g_free(qdev);
 365    }
 366
 367    if (blk_dev_has_tray(blk)) {
 368        info->has_tray_open = true;
 369        info->tray_open = blk_dev_is_tray_open(blk);
 370    }
 371
 372    if (blk_iostatus_is_enabled(blk)) {
 373        info->has_io_status = true;
 374        info->io_status = blk_iostatus(blk);
 375    }
 376
 377    if (bs && !QLIST_EMPTY(&bs->dirty_bitmaps)) {
 378        info->has_dirty_bitmaps = true;
 379        info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
 380    }
 381
 382    if (bs && bs->drv) {
 383        info->has_inserted = true;
 384        info->inserted = bdrv_block_device_info(blk, bs, errp);
 385        if (info->inserted == NULL) {
 386            goto err;
 387        }
 388    }
 389
 390    *p_info = info;
 391    return;
 392
 393 err:
 394    qapi_free_BlockInfo(info);
 395}
 396
 397static uint64List *uint64_list(uint64_t *list, int size)
 398{
 399    int i;
 400    uint64List *out_list = NULL;
 401    uint64List **pout_list = &out_list;
 402
 403    for (i = 0; i < size; i++) {
 404        uint64List *entry = g_new(uint64List, 1);
 405        entry->value = list[i];
 406        *pout_list = entry;
 407        pout_list = &entry->next;
 408    }
 409
 410    *pout_list = NULL;
 411
 412    return out_list;
 413}
 414
 415static void bdrv_latency_histogram_stats(BlockLatencyHistogram *hist,
 416                                         bool *not_null,
 417                                         BlockLatencyHistogramInfo **info)
 418{
 419    *not_null = hist->bins != NULL;
 420    if (*not_null) {
 421        *info = g_new0(BlockLatencyHistogramInfo, 1);
 422
 423        (*info)->boundaries = uint64_list(hist->boundaries, hist->nbins - 1);
 424        (*info)->bins = uint64_list(hist->bins, hist->nbins);
 425    }
 426}
 427
 428static void bdrv_query_blk_stats(BlockDeviceStats *ds, BlockBackend *blk)
 429{
 430    BlockAcctStats *stats = blk_get_stats(blk);
 431    BlockAcctTimedStats *ts = NULL;
 432
 433    ds->rd_bytes = stats->nr_bytes[BLOCK_ACCT_READ];
 434    ds->wr_bytes = stats->nr_bytes[BLOCK_ACCT_WRITE];
 435    ds->rd_operations = stats->nr_ops[BLOCK_ACCT_READ];
 436    ds->wr_operations = stats->nr_ops[BLOCK_ACCT_WRITE];
 437
 438    ds->failed_rd_operations = stats->failed_ops[BLOCK_ACCT_READ];
 439    ds->failed_wr_operations = stats->failed_ops[BLOCK_ACCT_WRITE];
 440    ds->failed_flush_operations = stats->failed_ops[BLOCK_ACCT_FLUSH];
 441
 442    ds->invalid_rd_operations = stats->invalid_ops[BLOCK_ACCT_READ];
 443    ds->invalid_wr_operations = stats->invalid_ops[BLOCK_ACCT_WRITE];
 444    ds->invalid_flush_operations =
 445        stats->invalid_ops[BLOCK_ACCT_FLUSH];
 446
 447    ds->rd_merged = stats->merged[BLOCK_ACCT_READ];
 448    ds->wr_merged = stats->merged[BLOCK_ACCT_WRITE];
 449    ds->flush_operations = stats->nr_ops[BLOCK_ACCT_FLUSH];
 450    ds->wr_total_time_ns = stats->total_time_ns[BLOCK_ACCT_WRITE];
 451    ds->rd_total_time_ns = stats->total_time_ns[BLOCK_ACCT_READ];
 452    ds->flush_total_time_ns = stats->total_time_ns[BLOCK_ACCT_FLUSH];
 453
 454    ds->has_idle_time_ns = stats->last_access_time_ns > 0;
 455    if (ds->has_idle_time_ns) {
 456        ds->idle_time_ns = block_acct_idle_time_ns(stats);
 457    }
 458
 459    ds->account_invalid = stats->account_invalid;
 460    ds->account_failed = stats->account_failed;
 461
 462    while ((ts = block_acct_interval_next(stats, ts))) {
 463        BlockDeviceTimedStatsList *timed_stats =
 464            g_malloc0(sizeof(*timed_stats));
 465        BlockDeviceTimedStats *dev_stats = g_malloc0(sizeof(*dev_stats));
 466        timed_stats->next = ds->timed_stats;
 467        timed_stats->value = dev_stats;
 468        ds->timed_stats = timed_stats;
 469
 470        TimedAverage *rd = &ts->latency[BLOCK_ACCT_READ];
 471        TimedAverage *wr = &ts->latency[BLOCK_ACCT_WRITE];
 472        TimedAverage *fl = &ts->latency[BLOCK_ACCT_FLUSH];
 473
 474        dev_stats->interval_length = ts->interval_length;
 475
 476        dev_stats->min_rd_latency_ns = timed_average_min(rd);
 477        dev_stats->max_rd_latency_ns = timed_average_max(rd);
 478        dev_stats->avg_rd_latency_ns = timed_average_avg(rd);
 479
 480        dev_stats->min_wr_latency_ns = timed_average_min(wr);
 481        dev_stats->max_wr_latency_ns = timed_average_max(wr);
 482        dev_stats->avg_wr_latency_ns = timed_average_avg(wr);
 483
 484        dev_stats->min_flush_latency_ns = timed_average_min(fl);
 485        dev_stats->max_flush_latency_ns = timed_average_max(fl);
 486        dev_stats->avg_flush_latency_ns = timed_average_avg(fl);
 487
 488        dev_stats->avg_rd_queue_depth =
 489            block_acct_queue_depth(ts, BLOCK_ACCT_READ);
 490        dev_stats->avg_wr_queue_depth =
 491            block_acct_queue_depth(ts, BLOCK_ACCT_WRITE);
 492    }
 493
 494    bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_READ],
 495                                 &ds->has_x_rd_latency_histogram,
 496                                 &ds->x_rd_latency_histogram);
 497    bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_WRITE],
 498                                 &ds->has_x_wr_latency_histogram,
 499                                 &ds->x_wr_latency_histogram);
 500    bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_FLUSH],
 501                                 &ds->has_x_flush_latency_histogram,
 502                                 &ds->x_flush_latency_histogram);
 503}
 504
 505static BlockStats *bdrv_query_bds_stats(BlockDriverState *bs,
 506                                        bool blk_level)
 507{
 508    BlockStats *s = NULL;
 509
 510    s = g_malloc0(sizeof(*s));
 511    s->stats = g_malloc0(sizeof(*s->stats));
 512
 513    if (!bs) {
 514        return s;
 515    }
 516
 517    /* Skip automatically inserted nodes that the user isn't aware of in
 518     * a BlockBackend-level command. Stay at the exact node for a node-level
 519     * command. */
 520    while (blk_level && bs->drv && bs->implicit) {
 521        bs = backing_bs(bs);
 522        assert(bs);
 523    }
 524
 525    if (bdrv_get_node_name(bs)[0]) {
 526        s->has_node_name = true;
 527        s->node_name = g_strdup(bdrv_get_node_name(bs));
 528    }
 529
 530    s->stats->wr_highest_offset = stat64_get(&bs->wr_highest_offset);
 531
 532    if (bs->file) {
 533        s->has_parent = true;
 534        s->parent = bdrv_query_bds_stats(bs->file->bs, blk_level);
 535    }
 536
 537    if (blk_level && bs->backing) {
 538        s->has_backing = true;
 539        s->backing = bdrv_query_bds_stats(bs->backing->bs, blk_level);
 540    }
 541
 542    return s;
 543}
 544
 545BlockInfoList *qmp_query_block(Error **errp)
 546{
 547    BlockInfoList *head = NULL, **p_next = &head;
 548    BlockBackend *blk;
 549    Error *local_err = NULL;
 550
 551    for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
 552        BlockInfoList *info;
 553
 554        if (!*blk_name(blk) && !blk_get_attached_dev(blk)) {
 555            continue;
 556        }
 557
 558        info = g_malloc0(sizeof(*info));
 559        bdrv_query_info(blk, &info->value, &local_err);
 560        if (local_err) {
 561            error_propagate(errp, local_err);
 562            g_free(info);
 563            qapi_free_BlockInfoList(head);
 564            return NULL;
 565        }
 566
 567        *p_next = info;
 568        p_next = &info->next;
 569    }
 570
 571    return head;
 572}
 573
 574BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
 575                                     bool query_nodes,
 576                                     Error **errp)
 577{
 578    BlockStatsList *head = NULL, **p_next = &head;
 579    BlockBackend *blk;
 580    BlockDriverState *bs;
 581
 582    /* Just to be safe if query_nodes is not always initialized */
 583    if (has_query_nodes && query_nodes) {
 584        for (bs = bdrv_next_node(NULL); bs; bs = bdrv_next_node(bs)) {
 585            BlockStatsList *info = g_malloc0(sizeof(*info));
 586            AioContext *ctx = bdrv_get_aio_context(bs);
 587
 588            aio_context_acquire(ctx);
 589            info->value = bdrv_query_bds_stats(bs, false);
 590            aio_context_release(ctx);
 591
 592            *p_next = info;
 593            p_next = &info->next;
 594        }
 595    } else {
 596        for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
 597            BlockStatsList *info;
 598            AioContext *ctx = blk_get_aio_context(blk);
 599            BlockStats *s;
 600            char *qdev;
 601
 602            if (!*blk_name(blk) && !blk_get_attached_dev(blk)) {
 603                continue;
 604            }
 605
 606            aio_context_acquire(ctx);
 607            s = bdrv_query_bds_stats(blk_bs(blk), true);
 608            s->has_device = true;
 609            s->device = g_strdup(blk_name(blk));
 610
 611            qdev = blk_get_attached_dev_id(blk);
 612            if (qdev && *qdev) {
 613                s->has_qdev = true;
 614                s->qdev = qdev;
 615            } else {
 616                g_free(qdev);
 617            }
 618
 619            bdrv_query_blk_stats(s->stats, blk);
 620            aio_context_release(ctx);
 621
 622            info = g_malloc0(sizeof(*info));
 623            info->value = s;
 624            *p_next = info;
 625            p_next = &info->next;
 626        }
 627    }
 628
 629    return head;
 630}
 631
 632#define NB_SUFFIXES 4
 633
 634static char *get_human_readable_size(char *buf, int buf_size, int64_t size)
 635{
 636    static const char suffixes[NB_SUFFIXES] = {'K', 'M', 'G', 'T'};
 637    int64_t base;
 638    int i;
 639
 640    if (size <= 999) {
 641        snprintf(buf, buf_size, "%" PRId64, size);
 642    } else {
 643        base = 1024;
 644        for (i = 0; i < NB_SUFFIXES; i++) {
 645            if (size < (10 * base)) {
 646                snprintf(buf, buf_size, "%0.1f%c",
 647                         (double)size / base,
 648                         suffixes[i]);
 649                break;
 650            } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) {
 651                snprintf(buf, buf_size, "%" PRId64 "%c",
 652                         ((size + (base >> 1)) / base),
 653                         suffixes[i]);
 654                break;
 655            }
 656            base = base * 1024;
 657        }
 658    }
 659    return buf;
 660}
 661
 662void bdrv_snapshot_dump(fprintf_function func_fprintf, void *f,
 663                        QEMUSnapshotInfo *sn)
 664{
 665    char buf1[128], date_buf[128], clock_buf[128];
 666    struct tm tm;
 667    time_t ti;
 668    int64_t secs;
 669
 670    if (!sn) {
 671        func_fprintf(f,
 672                     "%-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        func_fprintf(f,
 687                     "%-10s%-20s%7s%20s%15s",
 688                     sn->id_str, sn->name,
 689                     get_human_readable_size(buf1, sizeof(buf1),
 690                                             sn->vm_state_size),
 691                     date_buf,
 692                     clock_buf);
 693    }
 694}
 695
 696static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation,
 697                       QDict *dict);
 698static void dump_qlist(fprintf_function func_fprintf, void *f, int indentation,
 699                       QList *list);
 700
 701static void dump_qobject(fprintf_function func_fprintf, void *f,
 702                         int comp_indent, QObject *obj)
 703{
 704    switch (qobject_type(obj)) {
 705        case QTYPE_QNUM: {
 706            QNum *value = qobject_to(QNum, obj);
 707            char *tmp = qnum_to_string(value);
 708            func_fprintf(f, "%s", tmp);
 709            g_free(tmp);
 710            break;
 711        }
 712        case QTYPE_QSTRING: {
 713            QString *value = qobject_to(QString, obj);
 714            func_fprintf(f, "%s", qstring_get_str(value));
 715            break;
 716        }
 717        case QTYPE_QDICT: {
 718            QDict *value = qobject_to(QDict, obj);
 719            dump_qdict(func_fprintf, f, comp_indent, value);
 720            break;
 721        }
 722        case QTYPE_QLIST: {
 723            QList *value = qobject_to(QList, obj);
 724            dump_qlist(func_fprintf, f, comp_indent, value);
 725            break;
 726        }
 727        case QTYPE_QBOOL: {
 728            QBool *value = qobject_to(QBool, obj);
 729            func_fprintf(f, "%s", qbool_get_bool(value) ? "true" : "false");
 730            break;
 731        }
 732        default:
 733            abort();
 734    }
 735}
 736
 737static void dump_qlist(fprintf_function func_fprintf, void *f, int indentation,
 738                       QList *list)
 739{
 740    const QListEntry *entry;
 741    int i = 0;
 742
 743    for (entry = qlist_first(list); entry; entry = qlist_next(entry), i++) {
 744        QType type = qobject_type(entry->value);
 745        bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 746        func_fprintf(f, "%*s[%i]:%c", indentation * 4, "", i,
 747                     composite ? '\n' : ' ');
 748        dump_qobject(func_fprintf, f, indentation + 1, entry->value);
 749        if (!composite) {
 750            func_fprintf(f, "\n");
 751        }
 752    }
 753}
 754
 755static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation,
 756                       QDict *dict)
 757{
 758    const QDictEntry *entry;
 759
 760    for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) {
 761        QType type = qobject_type(entry->value);
 762        bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 763        char *key = g_malloc(strlen(entry->key) + 1);
 764        int i;
 765
 766        /* replace dashes with spaces in key (variable) names */
 767        for (i = 0; entry->key[i]; i++) {
 768            key[i] = entry->key[i] == '-' ? ' ' : entry->key[i];
 769        }
 770        key[i] = 0;
 771        func_fprintf(f, "%*s%s:%c", indentation * 4, "", key,
 772                     composite ? '\n' : ' ');
 773        dump_qobject(func_fprintf, f, indentation + 1, entry->value);
 774        if (!composite) {
 775            func_fprintf(f, "\n");
 776        }
 777        g_free(key);
 778    }
 779}
 780
 781void bdrv_image_info_specific_dump(fprintf_function func_fprintf, void *f,
 782                                   ImageInfoSpecific *info_spec)
 783{
 784    QObject *obj, *data;
 785    Visitor *v = qobject_output_visitor_new(&obj);
 786
 787    visit_type_ImageInfoSpecific(v, NULL, &info_spec, &error_abort);
 788    visit_complete(v, &obj);
 789    data = qdict_get(qobject_to(QDict, obj), "data");
 790    dump_qobject(func_fprintf, f, 1, data);
 791    qobject_unref(obj);
 792    visit_free(v);
 793}
 794
 795void bdrv_image_info_dump(fprintf_function func_fprintf, void *f,
 796                          ImageInfo *info)
 797{
 798    char size_buf[128], dsize_buf[128];
 799    if (!info->has_actual_size) {
 800        snprintf(dsize_buf, sizeof(dsize_buf), "unavailable");
 801    } else {
 802        get_human_readable_size(dsize_buf, sizeof(dsize_buf),
 803                                info->actual_size);
 804    }
 805    get_human_readable_size(size_buf, sizeof(size_buf), info->virtual_size);
 806    func_fprintf(f,
 807                 "image: %s\n"
 808                 "file format: %s\n"
 809                 "virtual size: %s (%" PRId64 " bytes)\n"
 810                 "disk size: %s\n",
 811                 info->filename, info->format, size_buf,
 812                 info->virtual_size,
 813                 dsize_buf);
 814
 815    if (info->has_encrypted && info->encrypted) {
 816        func_fprintf(f, "encrypted: yes\n");
 817    }
 818
 819    if (info->has_cluster_size) {
 820        func_fprintf(f, "cluster_size: %" PRId64 "\n",
 821                       info->cluster_size);
 822    }
 823
 824    if (info->has_dirty_flag && info->dirty_flag) {
 825        func_fprintf(f, "cleanly shut down: no\n");
 826    }
 827
 828    if (info->has_backing_filename) {
 829        func_fprintf(f, "backing file: %s", info->backing_filename);
 830        if (!info->has_full_backing_filename) {
 831            func_fprintf(f, " (cannot determine actual path)");
 832        } else if (strcmp(info->backing_filename,
 833                          info->full_backing_filename) != 0) {
 834            func_fprintf(f, " (actual path: %s)", info->full_backing_filename);
 835        }
 836        func_fprintf(f, "\n");
 837        if (info->has_backing_filename_format) {
 838            func_fprintf(f, "backing file format: %s\n",
 839                         info->backing_filename_format);
 840        }
 841    }
 842
 843    if (info->has_snapshots) {
 844        SnapshotInfoList *elem;
 845
 846        func_fprintf(f, "Snapshot list:\n");
 847        bdrv_snapshot_dump(func_fprintf, f, NULL);
 848        func_fprintf(f, "\n");
 849
 850        /* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but
 851         * we convert to the block layer's native QEMUSnapshotInfo for now.
 852         */
 853        for (elem = info->snapshots; elem; elem = elem->next) {
 854            QEMUSnapshotInfo sn = {
 855                .vm_state_size = elem->value->vm_state_size,
 856                .date_sec = elem->value->date_sec,
 857                .date_nsec = elem->value->date_nsec,
 858                .vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +
 859                                 elem->value->vm_clock_nsec,
 860            };
 861
 862            pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);
 863            pstrcpy(sn.name, sizeof(sn.name), elem->value->name);
 864            bdrv_snapshot_dump(func_fprintf, f, &sn);
 865            func_fprintf(f, "\n");
 866        }
 867    }
 868
 869    if (info->has_format_specific) {
 870        func_fprintf(f, "Format specific information:\n");
 871        bdrv_image_info_specific_dump(func_fprintf, f, info->format_specific);
 872    }
 873}
 874