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 "qmp-commands.h"
  31 #include "qapi-visit.h"
  32 #include "qapi/qobject-output-visitor.h"
  33 #include "qapi/qmp/types.h"
  34 #include "sysemu/block-backend.h"
  35 #include "qemu/cutils.h"
  36
  37 BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
  38                                         BlockDriverState *bs, Error **errp)
  39 {
  40     ImageInfo **p_image_info;
  41     BlockDriverState *bs0;
  42     BlockDeviceInfo *info = g_malloc0(sizeof(*info));
  43
  44     info->file                   = g_strdup(bs->filename);
  45     info->ro                     = bs->read_only;
  46     info->drv                    = g_strdup(bs->drv->format_name);
  47     info->encrypted              = bs->encrypted;
  48     info->encryption_key_missing = false;
  49
  50     info->cache = g_new(BlockdevCacheInfo, 1);
  51     *info->cache = (BlockdevCacheInfo) {
  52         .writeback      = blk ? blk_enable_write_cache(blk) : true,
  53         .direct         = !!(bs->open_flags & BDRV_O_NOCACHE),
  54         .no_flush       = !!(bs->open_flags & BDRV_O_NO_FLUSH),
  55     };
  56
  57     if (bs->node_name[0]) {
  58         info->has_node_name = true;
  59         info->node_name = g_strdup(bs->node_name);
  60     }
  61
  62     if (bs->backing_file[0]) {
  63         info->has_backing_file = true;
  64         info->backing_file = g_strdup(bs->backing_file);
  65     }
  66
  67     info->backing_file_depth = bdrv_get_backing_file_depth(bs);
  68     info->detect_zeroes = bs->detect_zeroes;
  69
  70     if (blk && blk_get_public(blk)->throttle_state) {
  71         ThrottleConfig cfg;
  72
  73         throttle_group_get_config(blk, &cfg);
  74
  75         info->bps     = cfg.buckets[THROTTLE_BPS_TOTAL].avg;
  76         info->bps_rd  = cfg.buckets[THROTTLE_BPS_READ].avg;
  77         info->bps_wr  = cfg.buckets[THROTTLE_BPS_WRITE].avg;
  78
  79         info->iops    = cfg.buckets[THROTTLE_OPS_TOTAL].avg;
  80         info->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg;
  81         info->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg;
  82
  83         info->has_bps_max     = cfg.buckets[THROTTLE_BPS_TOTAL].max;
  84         info->bps_max         = cfg.buckets[THROTTLE_BPS_TOTAL].max;
  85         info->has_bps_rd_max  = cfg.buckets[THROTTLE_BPS_READ].max;
  86         info->bps_rd_max      = cfg.buckets[THROTTLE_BPS_READ].max;
  87         info->has_bps_wr_max  = cfg.buckets[THROTTLE_BPS_WRITE].max;
  88         info->bps_wr_max      = cfg.buckets[THROTTLE_BPS_WRITE].max;
  89
  90         info->has_iops_max    = cfg.buckets[THROTTLE_OPS_TOTAL].max;
  91         info->iops_max        = cfg.buckets[THROTTLE_OPS_TOTAL].max;
  92         info->has_iops_rd_max = cfg.buckets[THROTTLE_OPS_READ].max;
  93         info->iops_rd_max     = cfg.buckets[THROTTLE_OPS_READ].max;
  94         info->has_iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max;
  95         info->iops_wr_max     = cfg.buckets[THROTTLE_OPS_WRITE].max;
  96
  97         info->has_bps_max_length     = info->has_bps_max;
  98         info->bps_max_length         =
  99             cfg.buckets[THROTTLE_BPS_TOTAL].burst_length;
 100         info->has_bps_rd_max_length  = info->has_bps_rd_max;
 101         info->bps_rd_max_length      =
 102             cfg.buckets[THROTTLE_BPS_READ].burst_length;
 103         info->has_bps_wr_max_length  = info->has_bps_wr_max;
 104         info->bps_wr_max_length      =
 105             cfg.buckets[THROTTLE_BPS_WRITE].burst_length;
 106
 107         info->has_iops_max_length    = info->has_iops_max;
 108         info->iops_max_length        =
 109             cfg.buckets[THROTTLE_OPS_TOTAL].burst_length;
 110         info->has_iops_rd_max_length = info->has_iops_rd_max;
 111         info->iops_rd_max_length     =
 112             cfg.buckets[THROTTLE_OPS_READ].burst_length;
 113         info->has_iops_wr_max_length = info->has_iops_wr_max;
 114         info->iops_wr_max_length     =
 115             cfg.buckets[THROTTLE_OPS_WRITE].burst_length;
 116
 117         info->has_iops_size = cfg.op_size;
 118         info->iops_size = cfg.op_size;
 119
 120         info->has_group = true;
 121         info->group = g_strdup(throttle_group_get_name(blk));
 122     }
 123
 124     info->write_threshold = bdrv_write_threshold_get(bs);
 125
 126     bs0 = bs;
 127     p_image_info = &info->image;
 128     while (1) {
 129         Error *local_err = NULL;
 130         bdrv_query_image_info(bs0, p_image_info, &local_err);
 131         if (local_err) {
 132             error_propagate(errp, local_err);
 133             qapi_free_BlockDeviceInfo(info);
 134             return NULL;
 135         }
 136         if (bs0->drv && bs0->backing) {
 137             bs0 = bs0->backing->bs;
 138             (*p_image_info)->has_backing_image = true;
 139             p_image_info = &((*p_image_info)->backing_image);
 140         } else {
 141             break;
 142         }
 143     }
 144
 145     return info;
 146 }
 147
 148 /*
 149  * Returns 0 on success, with *p_list either set to describe snapshot
 150  * information, or NULL because there are no snapshots.  Returns -errno on
 151  * error, with *p_list untouched.
 152  */
 153 int bdrv_query_snapshot_info_list(BlockDriverState *bs,
 154                                   SnapshotInfoList **p_list,
 155                                   Error **errp)
 156 {
 157     int i, sn_count;
 158     QEMUSnapshotInfo *sn_tab = NULL;
 159     SnapshotInfoList *info_list, *cur_item = NULL, *head = NULL;
 160     SnapshotInfo *info;
 161
 162     sn_count = bdrv_snapshot_list(bs, &sn_tab);
 163     if (sn_count < 0) {
 164         const char *dev = bdrv_get_device_name(bs);
 165         switch (sn_count) {
 166         case -ENOMEDIUM:
 167             error_setg(errp, "Device '%s' is not inserted", dev);
 168             break;
 169         case -ENOTSUP:
 170             error_setg(errp,
 171                        "Device '%s' does not support internal snapshots",
 172                        dev);
 173             break;
 174         default:
 175             error_setg_errno(errp, -sn_count,
 176                              "Can't list snapshots of device '%s'", dev);
 177             break;
 178         }
 179         return sn_count;
 180     }
 181
 182     for (i = 0; i < sn_count; i++) {
 183         info = g_new0(SnapshotInfo, 1);
 184         info->id            = g_strdup(sn_tab[i].id_str);
 185         info->name          = g_strdup(sn_tab[i].name);
 186         info->vm_state_size = sn_tab[i].vm_state_size;
 187         info->date_sec      = sn_tab[i].date_sec;
 188         info->date_nsec     = sn_tab[i].date_nsec;
 189         info->vm_clock_sec  = sn_tab[i].vm_clock_nsec / 1000000000;
 190         info->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
 191
 192         info_list = g_new0(SnapshotInfoList, 1);
 193         info_list->value = info;
 194
 195         /* XXX: waiting for the qapi to support qemu-queue.h types */
 196         if (!cur_item) {
 197             head = cur_item = info_list;
 198         } else {
 199             cur_item->next = info_list;
 200             cur_item = info_list;
 201         }
 202
 203     }
 204
 205     g_free(sn_tab);
 206     *p_list = head;
 207     return 0;
 208 }
 209
 210 /**
 211  * bdrv_query_image_info:
 212  * @bs: block device to examine
 213  * @p_info: location to store image information
 214  * @errp: location to store error information
 215  *
 216  * Store "flat" image information in @p_info.
 217  *
 218  * "Flat" means it does *not* query backing image information,
 219  * i.e. (*pinfo)->has_backing_image will be set to false and
 220  * (*pinfo)->backing_image to NULL even when the image does in fact have
 221  * a backing image.
 222  *
 223  * @p_info will be set only on success. On error, store error in @errp.
 224  */
 225 void bdrv_query_image_info(BlockDriverState *bs,
 226                            ImageInfo **p_info,
 227                            Error **errp)
 228 {
 229     int64_t size;
 230     const char *backing_filename;
 231     BlockDriverInfo bdi;
 232     int ret;
 233     Error *err = NULL;
 234     ImageInfo *info;
 235
 236     aio_context_acquire(bdrv_get_aio_context(bs));
 237
 238     size = bdrv_getlength(bs);
 239     if (size < 0) {
 240         error_setg_errno(errp, -size, "Can't get image size '%s'",
 241                          bs->exact_filename);
 242         goto out;
 243     }
 244
 245     info = g_new0(ImageInfo, 1);
 246     info->filename        = g_strdup(bs->filename);
 247     info->format          = g_strdup(bdrv_get_format_name(bs));
 248     info->virtual_size    = size;
 249     info->actual_size     = bdrv_get_allocated_file_size(bs);
 250     info->has_actual_size = info->actual_size >= 0;
 251     if (bdrv_is_encrypted(bs)) {
 252         info->encrypted = true;
 253         info->has_encrypted = true;
 254     }
 255     if (bdrv_get_info(bs, &bdi) >= 0) {
 256         if (bdi.cluster_size != 0) {
 257             info->cluster_size = bdi.cluster_size;
 258             info->has_cluster_size = true;
 259         }
 260         info->dirty_flag = bdi.is_dirty;
 261         info->has_dirty_flag = true;
 262     }
 263     info->format_specific     = bdrv_get_specific_info(bs);
 264     info->has_format_specific = info->format_specific != NULL;
 265
 266     backing_filename = bs->backing_file;
 267     if (backing_filename[0] != '\0') {
 268         char *backing_filename2 = g_malloc0(PATH_MAX);
 269         info->backing_filename = g_strdup(backing_filename);
 270         info->has_backing_filename = true;
 271         bdrv_get_full_backing_filename(bs, backing_filename2, PATH_MAX, &err);
 272         if (err) {
 273             /* Can't reconstruct the full backing filename, so we must omit
 274              * this field and apply a Best Effort to this query. */
 275             g_free(backing_filename2);
 276             backing_filename2 = NULL;
 277             error_free(err);
 278             err = NULL;
 279         }
 280
 281         /* Always report the full_backing_filename if present, even if it's the
 282          * same as backing_filename. That they are same is useful info. */
 283         if (backing_filename2) {
 284             info->full_backing_filename = g_strdup(backing_filename2);
 285             info->has_full_backing_filename = true;
 286         }
 287
 288         if (bs->backing_format[0]) {
 289             info->backing_filename_format = g_strdup(bs->backing_format);
 290             info->has_backing_filename_format = true;
 291         }
 292         g_free(backing_filename2);
 293     }
 294
 295     ret = bdrv_query_snapshot_info_list(bs, &info->snapshots, &err);
 296     switch (ret) {
 297     case 0:
 298         if (info->snapshots) {
 299             info->has_snapshots = true;
 300         }
 301         break;
 302     /* recoverable error */
 303     case -ENOMEDIUM:
 304     case -ENOTSUP:
 305         error_free(err);
 306         break;
 307     default:
 308         error_propagate(errp, err);
 309         qapi_free_ImageInfo(info);
 310         goto out;
 311     }
 312
 313     *p_info = info;
 314
 315 out:
 316     aio_context_release(bdrv_get_aio_context(bs));
 317 }
 318
 319 /* @p_info will be set only on success. */
 320 static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
 321                             Error **errp)
 322 {
 323     BlockInfo *info = g_malloc0(sizeof(*info));
 324     BlockDriverState *bs = blk_bs(blk);
 325     char *qdev;
 326
 327     info->device = g_strdup(blk_name(blk));
 328     info->type = g_strdup("unknown");
 329     info->locked = blk_dev_is_medium_locked(blk);
 330     info->removable = blk_dev_has_removable_media(blk);
 331
 332     qdev = blk_get_attached_dev_id(blk);
 333     if (qdev && *qdev) {
 334         info->has_qdev = true;
 335         info->qdev = qdev;
 336     } else {
 337         g_free(qdev);
 338     }
 339
 340     if (blk_dev_has_tray(blk)) {
 341         info->has_tray_open = true;
 342         info->tray_open = blk_dev_is_tray_open(blk);
 343     }
 344
 345     if (blk_iostatus_is_enabled(blk)) {
 346         info->has_io_status = true;
 347         info->io_status = blk_iostatus(blk);
 348     }
 349
 350     if (bs && !QLIST_EMPTY(&bs->dirty_bitmaps)) {
 351         info->has_dirty_bitmaps = true;
 352         info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
 353     }
 354
 355     if (bs && bs->drv) {
 356         info->has_inserted = true;
 357         info->inserted = bdrv_block_device_info(blk, bs, errp);
 358         if (info->inserted == NULL) {
 359             goto err;
 360         }
 361     }
 362
 363     *p_info = info;
 364     return;
 365
 366  err:
 367     qapi_free_BlockInfo(info);
 368 }
 369
 370 static void bdrv_query_blk_stats(BlockDeviceStats *ds, BlockBackend *blk)
 371 {
 372     BlockAcctStats *stats = blk_get_stats(blk);
 373     BlockAcctTimedStats *ts = NULL;
 374
 375     ds->rd_bytes = stats->nr_bytes[BLOCK_ACCT_READ];
 376     ds->wr_bytes = stats->nr_bytes[BLOCK_ACCT_WRITE];
 377     ds->rd_operations = stats->nr_ops[BLOCK_ACCT_READ];
 378     ds->wr_operations = stats->nr_ops[BLOCK_ACCT_WRITE];
 379
 380     ds->failed_rd_operations = stats->failed_ops[BLOCK_ACCT_READ];
 381     ds->failed_wr_operations = stats->failed_ops[BLOCK_ACCT_WRITE];
 382     ds->failed_flush_operations = stats->failed_ops[BLOCK_ACCT_FLUSH];
 383
 384     ds->invalid_rd_operations = stats->invalid_ops[BLOCK_ACCT_READ];
 385     ds->invalid_wr_operations = stats->invalid_ops[BLOCK_ACCT_WRITE];
 386     ds->invalid_flush_operations =
 387         stats->invalid_ops[BLOCK_ACCT_FLUSH];
 388
 389     ds->rd_merged = stats->merged[BLOCK_ACCT_READ];
 390     ds->wr_merged = stats->merged[BLOCK_ACCT_WRITE];
 391     ds->flush_operations = stats->nr_ops[BLOCK_ACCT_FLUSH];
 392     ds->wr_total_time_ns = stats->total_time_ns[BLOCK_ACCT_WRITE];
 393     ds->rd_total_time_ns = stats->total_time_ns[BLOCK_ACCT_READ];
 394     ds->flush_total_time_ns = stats->total_time_ns[BLOCK_ACCT_FLUSH];
 395
 396     ds->has_idle_time_ns = stats->last_access_time_ns > 0;
 397     if (ds->has_idle_time_ns) {
 398         ds->idle_time_ns = block_acct_idle_time_ns(stats);
 399     }
 400
 401     ds->account_invalid = stats->account_invalid;
 402     ds->account_failed = stats->account_failed;
 403
 404     while ((ts = block_acct_interval_next(stats, ts))) {
 405         BlockDeviceTimedStatsList *timed_stats =
 406             g_malloc0(sizeof(*timed_stats));
 407         BlockDeviceTimedStats *dev_stats = g_malloc0(sizeof(*dev_stats));
 408         timed_stats->next = ds->timed_stats;
 409         timed_stats->value = dev_stats;
 410         ds->timed_stats = timed_stats;
 411
 412         TimedAverage *rd = &ts->latency[BLOCK_ACCT_READ];
 413         TimedAverage *wr = &ts->latency[BLOCK_ACCT_WRITE];
 414         TimedAverage *fl = &ts->latency[BLOCK_ACCT_FLUSH];
 415
 416         dev_stats->interval_length = ts->interval_length;
 417
 418         dev_stats->min_rd_latency_ns = timed_average_min(rd);
 419         dev_stats->max_rd_latency_ns = timed_average_max(rd);
 420         dev_stats->avg_rd_latency_ns = timed_average_avg(rd);
 421
 422         dev_stats->min_wr_latency_ns = timed_average_min(wr);
 423         dev_stats->max_wr_latency_ns = timed_average_max(wr);
 424         dev_stats->avg_wr_latency_ns = timed_average_avg(wr);
 425
 426         dev_stats->min_flush_latency_ns = timed_average_min(fl);
 427         dev_stats->max_flush_latency_ns = timed_average_max(fl);
 428         dev_stats->avg_flush_latency_ns = timed_average_avg(fl);
 429
 430         dev_stats->avg_rd_queue_depth =
 431             block_acct_queue_depth(ts, BLOCK_ACCT_READ);
 432         dev_stats->avg_wr_queue_depth =
 433             block_acct_queue_depth(ts, BLOCK_ACCT_WRITE);
 434     }
 435 }
 436
 437 static BlockStats *bdrv_query_bds_stats(const BlockDriverState *bs,
 438                                  bool query_backing)
 439 {
 440     BlockStats *s = NULL;
 441
 442     s = g_malloc0(sizeof(*s));
 443     s->stats = g_malloc0(sizeof(*s->stats));
 444
 445     if (!bs) {
 446         return s;
 447     }
 448
 449     if (bdrv_get_node_name(bs)[0]) {
 450         s->has_node_name = true;
 451         s->node_name = g_strdup(bdrv_get_node_name(bs));
 452     }
 453
 454     s->stats->wr_highest_offset = stat64_get(&bs->wr_highest_offset);
 455
 456     if (bs->file) {
 457         s->has_parent = true;
 458         s->parent = bdrv_query_bds_stats(bs->file->bs, query_backing);
 459     }
 460
 461     if (query_backing && bs->backing) {
 462         s->has_backing = true;
 463         s->backing = bdrv_query_bds_stats(bs->backing->bs, query_backing);
 464     }
 465
 466     return s;
 467 }
 468
 469 BlockInfoList *qmp_query_block(Error **errp)
 470 {
 471     BlockInfoList *head = NULL, **p_next = &head;
 472     BlockBackend *blk;
 473     Error *local_err = NULL;
 474
 475     for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
 476         BlockInfoList *info = g_malloc0(sizeof(*info));
 477         bdrv_query_info(blk, &info->value, &local_err);
 478         if (local_err) {
 479             error_propagate(errp, local_err);
 480             g_free(info);
 481             qapi_free_BlockInfoList(head);
 482             return NULL;
 483         }
 484
 485         *p_next = info;
 486         p_next = &info->next;
 487     }
 488
 489     return head;
 490 }
 491
 492 BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
 493                                      bool query_nodes,
 494                                      Error **errp)
 495 {
 496     BlockStatsList *head = NULL, **p_next = &head;
 497     BlockBackend *blk;
 498     BlockDriverState *bs;
 499
 500     /* Just to be safe if query_nodes is not always initialized */
 501     if (has_query_nodes && query_nodes) {
 502         for (bs = bdrv_next_node(NULL); bs; bs = bdrv_next_node(bs)) {
 503             BlockStatsList *info = g_malloc0(sizeof(*info));
 504             AioContext *ctx = bdrv_get_aio_context(bs);
 505
 506             aio_context_acquire(ctx);
 507             info->value = bdrv_query_bds_stats(bs, false);
 508             aio_context_release(ctx);
 509
 510             *p_next = info;
 511             p_next = &info->next;
 512         }
 513     } else {
 514         for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
 515             BlockStatsList *info = g_malloc0(sizeof(*info));
 516             AioContext *ctx = blk_get_aio_context(blk);
 517             BlockStats *s;
 518
 519             aio_context_acquire(ctx);
 520             s = bdrv_query_bds_stats(blk_bs(blk), true);
 521             s->has_device = true;
 522             s->device = g_strdup(blk_name(blk));
 523             bdrv_query_blk_stats(s->stats, blk);
 524             aio_context_release(ctx);
 525
 526             info->value = s;
 527             *p_next = info;
 528             p_next = &info->next;
 529         }
 530     }
 531
 532     return head;
 533 }
 534
 535 #define NB_SUFFIXES 4
 536
 537 static char *get_human_readable_size(char *buf, int buf_size, int64_t size)
 538 {
 539     static const char suffixes[NB_SUFFIXES] = {'K', 'M', 'G', 'T'};
 540     int64_t base;
 541     int i;
 542
 543     if (size <= 999) {
 544         snprintf(buf, buf_size, "%" PRId64, size);
 545     } else {
 546         base = 1024;
 547         for (i = 0; i < NB_SUFFIXES; i++) {
 548             if (size < (10 * base)) {
 549                 snprintf(buf, buf_size, "%0.1f%c",
 550                          (double)size / base,
 551                          suffixes[i]);
 552                 break;
 553             } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) {
 554                 snprintf(buf, buf_size, "%" PRId64 "%c",
 555                          ((size + (base >> 1)) / base),
 556                          suffixes[i]);
 557                 break;
 558             }
 559             base = base * 1024;
 560         }
 561     }
 562     return buf;
 563 }
 564
 565 void bdrv_snapshot_dump(fprintf_function func_fprintf, void *f,
 566                         QEMUSnapshotInfo *sn)
 567 {
 568     char buf1[128], date_buf[128], clock_buf[128];
 569     struct tm tm;
 570     time_t ti;
 571     int64_t secs;
 572
 573     if (!sn) {
 574         func_fprintf(f,
 575                      "%-10s%-20s%7s%20s%15s",
 576                      "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK");
 577     } else {
 578         ti = sn->date_sec;
 579         localtime_r(&ti, &tm);
 580         strftime(date_buf, sizeof(date_buf),
 581                  "%Y-%m-%d %H:%M:%S", &tm);
 582         secs = sn->vm_clock_nsec / 1000000000;
 583         snprintf(clock_buf, sizeof(clock_buf),
 584                  "%02d:%02d:%02d.%03d",
 585                  (int)(secs / 3600),
 586                  (int)((secs / 60) % 60),
 587                  (int)(secs % 60),
 588                  (int)((sn->vm_clock_nsec / 1000000) % 1000));
 589         func_fprintf(f,
 590                      "%-10s%-20s%7s%20s%15s",
 591                      sn->id_str, sn->name,
 592                      get_human_readable_size(buf1, sizeof(buf1),
 593                                              sn->vm_state_size),
 594                      date_buf,
 595                      clock_buf);
 596     }
 597 }
 598
 599 static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation,
 600                        QDict *dict);
 601 static void dump_qlist(fprintf_function func_fprintf, void *f, int indentation,
 602                        QList *list);
 603
 604 static void dump_qobject(fprintf_function func_fprintf, void *f,
 605                          int comp_indent, QObject *obj)
 606 {
 607     switch (qobject_type(obj)) {
 608         case QTYPE_QNUM: {
 609             QNum *value = qobject_to_qnum(obj);
 610             char *tmp = qnum_to_string(value);
 611             func_fprintf(f, "%s", tmp);
 612             g_free(tmp);
 613             break;
 614         }
 615         case QTYPE_QSTRING: {
 616             QString *value = qobject_to_qstring(obj);
 617             func_fprintf(f, "%s", qstring_get_str(value));
 618             break;
 619         }
 620         case QTYPE_QDICT: {
 621             QDict *value = qobject_to_qdict(obj);
 622             dump_qdict(func_fprintf, f, comp_indent, value);
 623             break;
 624         }
 625         case QTYPE_QLIST: {
 626             QList *value = qobject_to_qlist(obj);
 627             dump_qlist(func_fprintf, f, comp_indent, value);
 628             break;
 629         }
 630         case QTYPE_QBOOL: {
 631             QBool *value = qobject_to_qbool(obj);
 632             func_fprintf(f, "%s", qbool_get_bool(value) ? "true" : "false");
 633             break;
 634         }
 635         default:
 636             abort();
 637     }
 638 }
 639
 640 static void dump_qlist(fprintf_function func_fprintf, void *f, int indentation,
 641                        QList *list)
 642 {
 643     const QListEntry *entry;
 644     int i = 0;
 645
 646     for (entry = qlist_first(list); entry; entry = qlist_next(entry), i++) {
 647         QType type = qobject_type(entry->value);
 648         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 649         func_fprintf(f, "%*s[%i]:%c", indentation * 4, "", i,
 650                      composite ? '\n' : ' ');
 651         dump_qobject(func_fprintf, f, indentation + 1, entry->value);
 652         if (!composite) {
 653             func_fprintf(f, "\n");
 654         }
 655     }
 656 }
 657
 658 static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation,
 659                        QDict *dict)
 660 {
 661     const QDictEntry *entry;
 662
 663     for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) {
 664         QType type = qobject_type(entry->value);
 665         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 666         char *key = g_malloc(strlen(entry->key) + 1);
 667         int i;
 668
 669         /* replace dashes with spaces in key (variable) names */
 670         for (i = 0; entry->key[i]; i++) {
 671             key[i] = entry->key[i] == '-' ? ' ' : entry->key[i];
 672         }
 673         key[i] = 0;
 674         func_fprintf(f, "%*s%s:%c", indentation * 4, "", key,
 675                      composite ? '\n' : ' ');
 676         dump_qobject(func_fprintf, f, indentation + 1, entry->value);
 677         if (!composite) {
 678             func_fprintf(f, "\n");
 679         }
 680         g_free(key);
 681     }
 682 }
 683
 684 void bdrv_image_info_specific_dump(fprintf_function func_fprintf, void *f,
 685                                    ImageInfoSpecific *info_spec)
 686 {
 687     QObject *obj, *data;
 688     Visitor *v = qobject_output_visitor_new(&obj);
 689
 690     visit_type_ImageInfoSpecific(v, NULL, &info_spec, &error_abort);
 691     visit_complete(v, &obj);
 692     data = qdict_get(qobject_to_qdict(obj), "data");
 693     dump_qobject(func_fprintf, f, 1, data);
 694     qobject_decref(obj);
 695     visit_free(v);
 696 }
 697
 698 void bdrv_image_info_dump(fprintf_function func_fprintf, void *f,
 699                           ImageInfo *info)
 700 {
 701     char size_buf[128], dsize_buf[128];
 702     if (!info->has_actual_size) {
 703         snprintf(dsize_buf, sizeof(dsize_buf), "unavailable");
 704     } else {
 705         get_human_readable_size(dsize_buf, sizeof(dsize_buf),
 706                                 info->actual_size);
 707     }
 708     get_human_readable_size(size_buf, sizeof(size_buf), info->virtual_size);
 709     func_fprintf(f,
 710                  "image: %s\n"
 711                  "file format: %s\n"
 712                  "virtual size: %s (%" PRId64 " bytes)\n"
 713                  "disk size: %s\n",
 714                  info->filename, info->format, size_buf,
 715                  info->virtual_size,
 716                  dsize_buf);
 717
 718     if (info->has_encrypted && info->encrypted) {
 719         func_fprintf(f, "encrypted: yes\n");
 720     }
 721
 722     if (info->has_cluster_size) {
 723         func_fprintf(f, "cluster_size: %" PRId64 "\n",
 724                        info->cluster_size);
 725     }
 726
 727     if (info->has_dirty_flag && info->dirty_flag) {
 728         func_fprintf(f, "cleanly shut down: no\n");
 729     }
 730
 731     if (info->has_backing_filename) {
 732         func_fprintf(f, "backing file: %s", info->backing_filename);
 733         if (!info->has_full_backing_filename) {
 734             func_fprintf(f, " (cannot determine actual path)");
 735         } else if (strcmp(info->backing_filename,
 736                           info->full_backing_filename) != 0) {
 737             func_fprintf(f, " (actual path: %s)", info->full_backing_filename);
 738         }
 739         func_fprintf(f, "\n");
 740         if (info->has_backing_filename_format) {
 741             func_fprintf(f, "backing file format: %s\n",
 742                          info->backing_filename_format);
 743         }
 744     }
 745
 746     if (info->has_snapshots) {
 747         SnapshotInfoList *elem;
 748
 749         func_fprintf(f, "Snapshot list:\n");
 750         bdrv_snapshot_dump(func_fprintf, f, NULL);
 751         func_fprintf(f, "\n");
 752
 753         /* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but
 754          * we convert to the block layer's native QEMUSnapshotInfo for now.
 755          */
 756         for (elem = info->snapshots; elem; elem = elem->next) {
 757             QEMUSnapshotInfo sn = {
 758                 .vm_state_size = elem->value->vm_state_size,
 759                 .date_sec = elem->value->date_sec,
 760                 .date_nsec = elem->value->date_nsec,
 761                 .vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +
 762                                  elem->value->vm_clock_nsec,
 763             };
 764
 765             pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);
 766             pstrcpy(sn.name, sizeof(sn.name), elem->value->name);
 767             bdrv_snapshot_dump(func_fprintf, f, &sn);
 768             func_fprintf(f, "\n");
 769         }
 770     }
 771
 772     if (info->has_format_specific) {
 773         func_fprintf(f, "Format specific information:\n");
 774         bdrv_image_info_specific_dump(func_fprintf, f, info->format_specific);
 775     }
 776 }