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 "block/qapi.h"
  26 #include "block/block_int.h"
  27 #include "qmp-commands.h"
  28 #include "qapi-visit.h"
  29 #include "qapi/qmp-output-visitor.h"
  30 #include "qapi/qmp/types.h"
  31
  32 BlockDeviceInfo *bdrv_block_device_info(BlockDriverState *bs)
  33 {
  34     BlockDeviceInfo *info = g_malloc0(sizeof(*info));
  35
  36     info->file                   = g_strdup(bs->filename);
  37     info->ro                     = bs->read_only;
  38     info->drv                    = g_strdup(bs->drv->format_name);
  39     info->encrypted              = bs->encrypted;
  40     info->encryption_key_missing = bdrv_key_required(bs);
  41
  42     if (bs->node_name[0]) {
  43         info->has_node_name = true;
  44         info->node_name = g_strdup(bs->node_name);
  45     }
  46
  47     if (bs->backing_file[0]) {
  48         info->has_backing_file = true;
  49         info->backing_file = g_strdup(bs->backing_file);
  50     }
  51
  52     info->backing_file_depth = bdrv_get_backing_file_depth(bs);
  53     info->detect_zeroes = bs->detect_zeroes;
  54
  55     if (bs->io_limits_enabled) {
  56         ThrottleConfig cfg;
  57         throttle_get_config(&bs->throttle_state, &cfg);
  58         info->bps     = cfg.buckets[THROTTLE_BPS_TOTAL].avg;
  59         info->bps_rd  = cfg.buckets[THROTTLE_BPS_READ].avg;
  60         info->bps_wr  = cfg.buckets[THROTTLE_BPS_WRITE].avg;
  61
  62         info->iops    = cfg.buckets[THROTTLE_OPS_TOTAL].avg;
  63         info->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg;
  64         info->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg;
  65
  66         info->has_bps_max     = cfg.buckets[THROTTLE_BPS_TOTAL].max;
  67         info->bps_max         = cfg.buckets[THROTTLE_BPS_TOTAL].max;
  68         info->has_bps_rd_max  = cfg.buckets[THROTTLE_BPS_READ].max;
  69         info->bps_rd_max      = cfg.buckets[THROTTLE_BPS_READ].max;
  70         info->has_bps_wr_max  = cfg.buckets[THROTTLE_BPS_WRITE].max;
  71         info->bps_wr_max      = cfg.buckets[THROTTLE_BPS_WRITE].max;
  72
  73         info->has_iops_max    = cfg.buckets[THROTTLE_OPS_TOTAL].max;
  74         info->iops_max        = cfg.buckets[THROTTLE_OPS_TOTAL].max;
  75         info->has_iops_rd_max = cfg.buckets[THROTTLE_OPS_READ].max;
  76         info->iops_rd_max     = cfg.buckets[THROTTLE_OPS_READ].max;
  77         info->has_iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max;
  78         info->iops_wr_max     = cfg.buckets[THROTTLE_OPS_WRITE].max;
  79
  80         info->has_iops_size = cfg.op_size;
  81         info->iops_size = cfg.op_size;
  82     }
  83
  84     return info;
  85 }
  86
  87 /*
  88  * Returns 0 on success, with *p_list either set to describe snapshot
  89  * information, or NULL because there are no snapshots.  Returns -errno on
  90  * error, with *p_list untouched.
  91  */
  92 int bdrv_query_snapshot_info_list(BlockDriverState *bs,
  93                                   SnapshotInfoList **p_list,
  94                                   Error **errp)
  95 {
  96     int i, sn_count;
  97     QEMUSnapshotInfo *sn_tab = NULL;
  98     SnapshotInfoList *info_list, *cur_item = NULL, *head = NULL;
  99     SnapshotInfo *info;
 100
 101     sn_count = bdrv_snapshot_list(bs, &sn_tab);
 102     if (sn_count < 0) {
 103         const char *dev = bdrv_get_device_name(bs);
 104         switch (sn_count) {
 105         case -ENOMEDIUM:
 106             error_setg(errp, "Device '%s' is not inserted", dev);
 107             break;
 108         case -ENOTSUP:
 109             error_setg(errp,
 110                        "Device '%s' does not support internal snapshots",
 111                        dev);
 112             break;
 113         default:
 114             error_setg_errno(errp, -sn_count,
 115                              "Can't list snapshots of device '%s'", dev);
 116             break;
 117         }
 118         return sn_count;
 119     }
 120
 121     for (i = 0; i < sn_count; i++) {
 122         info = g_new0(SnapshotInfo, 1);
 123         info->id            = g_strdup(sn_tab[i].id_str);
 124         info->name          = g_strdup(sn_tab[i].name);
 125         info->vm_state_size = sn_tab[i].vm_state_size;
 126         info->date_sec      = sn_tab[i].date_sec;
 127         info->date_nsec     = sn_tab[i].date_nsec;
 128         info->vm_clock_sec  = sn_tab[i].vm_clock_nsec / 1000000000;
 129         info->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
 130
 131         info_list = g_new0(SnapshotInfoList, 1);
 132         info_list->value = info;
 133
 134         /* XXX: waiting for the qapi to support qemu-queue.h types */
 135         if (!cur_item) {
 136             head = cur_item = info_list;
 137         } else {
 138             cur_item->next = info_list;
 139             cur_item = info_list;
 140         }
 141
 142     }
 143
 144     g_free(sn_tab);
 145     *p_list = head;
 146     return 0;
 147 }
 148
 149 /**
 150  * bdrv_query_image_info:
 151  * @bs: block device to examine
 152  * @p_info: location to store image information
 153  * @errp: location to store error information
 154  *
 155  * Store "flat" image information in @p_info.
 156  *
 157  * "Flat" means it does *not* query backing image information,
 158  * i.e. (*pinfo)->has_backing_image will be set to false and
 159  * (*pinfo)->backing_image to NULL even when the image does in fact have
 160  * a backing image.
 161  *
 162  * @p_info will be set only on success. On error, store error in @errp.
 163  */
 164 void bdrv_query_image_info(BlockDriverState *bs,
 165                            ImageInfo **p_info,
 166                            Error **errp)
 167 {
 168     uint64_t total_sectors;
 169     const char *backing_filename;
 170     char backing_filename2[1024];
 171     BlockDriverInfo bdi;
 172     int ret;
 173     Error *err = NULL;
 174     ImageInfo *info = g_new0(ImageInfo, 1);
 175
 176     bdrv_get_geometry(bs, &total_sectors);
 177
 178     info->filename        = g_strdup(bs->filename);
 179     info->format          = g_strdup(bdrv_get_format_name(bs));
 180     info->virtual_size    = total_sectors * 512;
 181     info->actual_size     = bdrv_get_allocated_file_size(bs);
 182     info->has_actual_size = info->actual_size >= 0;
 183     if (bdrv_is_encrypted(bs)) {
 184         info->encrypted = true;
 185         info->has_encrypted = true;
 186     }
 187     if (bdrv_get_info(bs, &bdi) >= 0) {
 188         if (bdi.cluster_size != 0) {
 189             info->cluster_size = bdi.cluster_size;
 190             info->has_cluster_size = true;
 191         }
 192         info->dirty_flag = bdi.is_dirty;
 193         info->has_dirty_flag = true;
 194     }
 195     info->format_specific     = bdrv_get_specific_info(bs);
 196     info->has_format_specific = info->format_specific != NULL;
 197
 198     backing_filename = bs->backing_file;
 199     if (backing_filename[0] != '\0') {
 200         info->backing_filename = g_strdup(backing_filename);
 201         info->has_backing_filename = true;
 202         bdrv_get_full_backing_filename(bs, backing_filename2,
 203                                        sizeof(backing_filename2));
 204
 205         if (strcmp(backing_filename, backing_filename2) != 0) {
 206             info->full_backing_filename =
 207                         g_strdup(backing_filename2);
 208             info->has_full_backing_filename = true;
 209         }
 210
 211         if (bs->backing_format[0]) {
 212             info->backing_filename_format = g_strdup(bs->backing_format);
 213             info->has_backing_filename_format = true;
 214         }
 215     }
 216
 217     ret = bdrv_query_snapshot_info_list(bs, &info->snapshots, &err);
 218     switch (ret) {
 219     case 0:
 220         if (info->snapshots) {
 221             info->has_snapshots = true;
 222         }
 223         break;
 224     /* recoverable error */
 225     case -ENOMEDIUM:
 226     case -ENOTSUP:
 227         error_free(err);
 228         break;
 229     default:
 230         error_propagate(errp, err);
 231         qapi_free_ImageInfo(info);
 232         return;
 233     }
 234
 235     *p_info = info;
 236 }
 237
 238 /* @p_info will be set only on success. */
 239 void bdrv_query_info(BlockDriverState *bs,
 240                      BlockInfo **p_info,
 241                      Error **errp)
 242 {
 243     BlockInfo *info = g_malloc0(sizeof(*info));
 244     BlockDriverState *bs0;
 245     ImageInfo **p_image_info;
 246     Error *local_err = NULL;
 247     info->device = g_strdup(bs->device_name);
 248     info->type = g_strdup("unknown");
 249     info->locked = bdrv_dev_is_medium_locked(bs);
 250     info->removable = bdrv_dev_has_removable_media(bs);
 251
 252     if (bdrv_dev_has_removable_media(bs)) {
 253         info->has_tray_open = true;
 254         info->tray_open = bdrv_dev_is_tray_open(bs);
 255     }
 256
 257     if (bdrv_iostatus_is_enabled(bs)) {
 258         info->has_io_status = true;
 259         info->io_status = bs->iostatus;
 260     }
 261
 262     if (!QLIST_EMPTY(&bs->dirty_bitmaps)) {
 263         info->has_dirty_bitmaps = true;
 264         info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
 265     }
 266
 267     if (bs->drv) {
 268         info->has_inserted = true;
 269         info->inserted = bdrv_block_device_info(bs);
 270
 271         bs0 = bs;
 272         p_image_info = &info->inserted->image;
 273         while (1) {
 274             bdrv_query_image_info(bs0, p_image_info, &local_err);
 275             if (local_err) {
 276                 error_propagate(errp, local_err);
 277                 goto err;
 278             }
 279             if (bs0->drv && bs0->backing_hd) {
 280                 bs0 = bs0->backing_hd;
 281                 (*p_image_info)->has_backing_image = true;
 282                 p_image_info = &((*p_image_info)->backing_image);
 283             } else {
 284                 break;
 285             }
 286         }
 287     }
 288
 289     *p_info = info;
 290     return;
 291
 292  err:
 293     qapi_free_BlockInfo(info);
 294 }
 295
 296 BlockStats *bdrv_query_stats(const BlockDriverState *bs)
 297 {
 298     BlockStats *s;
 299
 300     s = g_malloc0(sizeof(*s));
 301
 302     if (bs->device_name[0]) {
 303         s->has_device = true;
 304         s->device = g_strdup(bs->device_name);
 305     }
 306
 307     s->stats = g_malloc0(sizeof(*s->stats));
 308     s->stats->rd_bytes = bs->nr_bytes[BDRV_ACCT_READ];
 309     s->stats->wr_bytes = bs->nr_bytes[BDRV_ACCT_WRITE];
 310     s->stats->rd_operations = bs->nr_ops[BDRV_ACCT_READ];
 311     s->stats->wr_operations = bs->nr_ops[BDRV_ACCT_WRITE];
 312     s->stats->wr_highest_offset = bs->wr_highest_sector * BDRV_SECTOR_SIZE;
 313     s->stats->flush_operations = bs->nr_ops[BDRV_ACCT_FLUSH];
 314     s->stats->wr_total_time_ns = bs->total_time_ns[BDRV_ACCT_WRITE];
 315     s->stats->rd_total_time_ns = bs->total_time_ns[BDRV_ACCT_READ];
 316     s->stats->flush_total_time_ns = bs->total_time_ns[BDRV_ACCT_FLUSH];
 317
 318     if (bs->file) {
 319         s->has_parent = true;
 320         s->parent = bdrv_query_stats(bs->file);
 321     }
 322
 323     if (bs->backing_hd) {
 324         s->has_backing = true;
 325         s->backing = bdrv_query_stats(bs->backing_hd);
 326     }
 327
 328     return s;
 329 }
 330
 331 BlockInfoList *qmp_query_block(Error **errp)
 332 {
 333     BlockInfoList *head = NULL, **p_next = &head;
 334     BlockDriverState *bs = NULL;
 335     Error *local_err = NULL;
 336
 337      while ((bs = bdrv_next(bs))) {
 338         BlockInfoList *info = g_malloc0(sizeof(*info));
 339         bdrv_query_info(bs, &info->value, &local_err);
 340         if (local_err) {
 341             error_propagate(errp, local_err);
 342             goto err;
 343         }
 344
 345         *p_next = info;
 346         p_next = &info->next;
 347     }
 348
 349     return head;
 350
 351  err:
 352     qapi_free_BlockInfoList(head);
 353     return NULL;
 354 }
 355
 356 BlockStatsList *qmp_query_blockstats(Error **errp)
 357 {
 358     BlockStatsList *head = NULL, **p_next = &head;
 359     BlockDriverState *bs = NULL;
 360
 361      while ((bs = bdrv_next(bs))) {
 362         BlockStatsList *info = g_malloc0(sizeof(*info));
 363         info->value = bdrv_query_stats(bs);
 364
 365         *p_next = info;
 366         p_next = &info->next;
 367     }
 368
 369     return head;
 370 }
 371
 372 #define NB_SUFFIXES 4
 373
 374 static char *get_human_readable_size(char *buf, int buf_size, int64_t size)
 375 {
 376     static const char suffixes[NB_SUFFIXES] = "KMGT";
 377     int64_t base;
 378     int i;
 379
 380     if (size <= 999) {
 381         snprintf(buf, buf_size, "%" PRId64, size);
 382     } else {
 383         base = 1024;
 384         for (i = 0; i < NB_SUFFIXES; i++) {
 385             if (size < (10 * base)) {
 386                 snprintf(buf, buf_size, "%0.1f%c",
 387                          (double)size / base,
 388                          suffixes[i]);
 389                 break;
 390             } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) {
 391                 snprintf(buf, buf_size, "%" PRId64 "%c",
 392                          ((size + (base >> 1)) / base),
 393                          suffixes[i]);
 394                 break;
 395             }
 396             base = base * 1024;
 397         }
 398     }
 399     return buf;
 400 }
 401
 402 void bdrv_snapshot_dump(fprintf_function func_fprintf, void *f,
 403                         QEMUSnapshotInfo *sn)
 404 {
 405     char buf1[128], date_buf[128], clock_buf[128];
 406     struct tm tm;
 407     time_t ti;
 408     int64_t secs;
 409
 410     if (!sn) {
 411         func_fprintf(f,
 412                      "%-10s%-20s%7s%20s%15s",
 413                      "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK");
 414     } else {
 415         ti = sn->date_sec;
 416         localtime_r(&ti, &tm);
 417         strftime(date_buf, sizeof(date_buf),
 418                  "%Y-%m-%d %H:%M:%S", &tm);
 419         secs = sn->vm_clock_nsec / 1000000000;
 420         snprintf(clock_buf, sizeof(clock_buf),
 421                  "%02d:%02d:%02d.%03d",
 422                  (int)(secs / 3600),
 423                  (int)((secs / 60) % 60),
 424                  (int)(secs % 60),
 425                  (int)((sn->vm_clock_nsec / 1000000) % 1000));
 426         func_fprintf(f,
 427                      "%-10s%-20s%7s%20s%15s",
 428                      sn->id_str, sn->name,
 429                      get_human_readable_size(buf1, sizeof(buf1),
 430                                              sn->vm_state_size),
 431                      date_buf,
 432                      clock_buf);
 433     }
 434 }
 435
 436 static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation,
 437                        QDict *dict);
 438 static void dump_qlist(fprintf_function func_fprintf, void *f, int indentation,
 439                        QList *list);
 440
 441 static void dump_qobject(fprintf_function func_fprintf, void *f,
 442                          int comp_indent, QObject *obj)
 443 {
 444     switch (qobject_type(obj)) {
 445         case QTYPE_QINT: {
 446             QInt *value = qobject_to_qint(obj);
 447             func_fprintf(f, "%" PRId64, qint_get_int(value));
 448             break;
 449         }
 450         case QTYPE_QSTRING: {
 451             QString *value = qobject_to_qstring(obj);
 452             func_fprintf(f, "%s", qstring_get_str(value));
 453             break;
 454         }
 455         case QTYPE_QDICT: {
 456             QDict *value = qobject_to_qdict(obj);
 457             dump_qdict(func_fprintf, f, comp_indent, value);
 458             break;
 459         }
 460         case QTYPE_QLIST: {
 461             QList *value = qobject_to_qlist(obj);
 462             dump_qlist(func_fprintf, f, comp_indent, value);
 463             break;
 464         }
 465         case QTYPE_QFLOAT: {
 466             QFloat *value = qobject_to_qfloat(obj);
 467             func_fprintf(f, "%g", qfloat_get_double(value));
 468             break;
 469         }
 470         case QTYPE_QBOOL: {
 471             QBool *value = qobject_to_qbool(obj);
 472             func_fprintf(f, "%s", qbool_get_int(value) ? "true" : "false");
 473             break;
 474         }
 475         case QTYPE_QERROR: {
 476             QString *value = qerror_human((QError *)obj);
 477             func_fprintf(f, "%s", qstring_get_str(value));
 478             QDECREF(value);
 479             break;
 480         }
 481         case QTYPE_NONE:
 482             break;
 483         case QTYPE_MAX:
 484         default:
 485             abort();
 486     }
 487 }
 488
 489 static void dump_qlist(fprintf_function func_fprintf, void *f, int indentation,
 490                        QList *list)
 491 {
 492     const QListEntry *entry;
 493     int i = 0;
 494
 495     for (entry = qlist_first(list); entry; entry = qlist_next(entry), i++) {
 496         qtype_code type = qobject_type(entry->value);
 497         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 498         const char *format = composite ? "%*s[%i]:\n" : "%*s[%i]: ";
 499
 500         func_fprintf(f, format, indentation * 4, "", i);
 501         dump_qobject(func_fprintf, f, indentation + 1, entry->value);
 502         if (!composite) {
 503             func_fprintf(f, "\n");
 504         }
 505     }
 506 }
 507
 508 static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation,
 509                        QDict *dict)
 510 {
 511     const QDictEntry *entry;
 512
 513     for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) {
 514         qtype_code type = qobject_type(entry->value);
 515         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 516         const char *format = composite ? "%*s%s:\n" : "%*s%s: ";
 517         char key[strlen(entry->key) + 1];
 518         int i;
 519
 520         /* replace dashes with spaces in key (variable) names */
 521         for (i = 0; entry->key[i]; i++) {
 522             key[i] = entry->key[i] == '-' ? ' ' : entry->key[i];
 523         }
 524         key[i] = 0;
 525
 526         func_fprintf(f, format, indentation * 4, "", key);
 527         dump_qobject(func_fprintf, f, indentation + 1, entry->value);
 528         if (!composite) {
 529             func_fprintf(f, "\n");
 530         }
 531     }
 532 }
 533
 534 void bdrv_image_info_specific_dump(fprintf_function func_fprintf, void *f,
 535                                    ImageInfoSpecific *info_spec)
 536 {
 537     QmpOutputVisitor *ov = qmp_output_visitor_new();
 538     QObject *obj, *data;
 539
 540     visit_type_ImageInfoSpecific(qmp_output_get_visitor(ov), &info_spec, NULL,
 541                                  &error_abort);
 542     obj = qmp_output_get_qobject(ov);
 543     assert(qobject_type(obj) == QTYPE_QDICT);
 544     data = qdict_get(qobject_to_qdict(obj), "data");
 545     dump_qobject(func_fprintf, f, 1, data);
 546     qmp_output_visitor_cleanup(ov);
 547 }
 548
 549 void bdrv_image_info_dump(fprintf_function func_fprintf, void *f,
 550                           ImageInfo *info)
 551 {
 552     char size_buf[128], dsize_buf[128];
 553     if (!info->has_actual_size) {
 554         snprintf(dsize_buf, sizeof(dsize_buf), "unavailable");
 555     } else {
 556         get_human_readable_size(dsize_buf, sizeof(dsize_buf),
 557                                 info->actual_size);
 558     }
 559     get_human_readable_size(size_buf, sizeof(size_buf), info->virtual_size);
 560     func_fprintf(f,
 561                  "image: %s\n"
 562                  "file format: %s\n"
 563                  "virtual size: %s (%" PRId64 " bytes)\n"
 564                  "disk size: %s\n",
 565                  info->filename, info->format, size_buf,
 566                  info->virtual_size,
 567                  dsize_buf);
 568
 569     if (info->has_encrypted && info->encrypted) {
 570         func_fprintf(f, "encrypted: yes\n");
 571     }
 572
 573     if (info->has_cluster_size) {
 574         func_fprintf(f, "cluster_size: %" PRId64 "\n",
 575                        info->cluster_size);
 576     }
 577
 578     if (info->has_dirty_flag && info->dirty_flag) {
 579         func_fprintf(f, "cleanly shut down: no\n");
 580     }
 581
 582     if (info->has_backing_filename) {
 583         func_fprintf(f, "backing file: %s", info->backing_filename);
 584         if (info->has_full_backing_filename) {
 585             func_fprintf(f, " (actual path: %s)", info->full_backing_filename);
 586         }
 587         func_fprintf(f, "\n");
 588         if (info->has_backing_filename_format) {
 589             func_fprintf(f, "backing file format: %s\n",
 590                          info->backing_filename_format);
 591         }
 592     }
 593
 594     if (info->has_snapshots) {
 595         SnapshotInfoList *elem;
 596
 597         func_fprintf(f, "Snapshot list:\n");
 598         bdrv_snapshot_dump(func_fprintf, f, NULL);
 599         func_fprintf(f, "\n");
 600
 601         /* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but
 602          * we convert to the block layer's native QEMUSnapshotInfo for now.
 603          */
 604         for (elem = info->snapshots; elem; elem = elem->next) {
 605             QEMUSnapshotInfo sn = {
 606                 .vm_state_size = elem->value->vm_state_size,
 607                 .date_sec = elem->value->date_sec,
 608                 .date_nsec = elem->value->date_nsec,
 609                 .vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +
 610                                  elem->value->vm_clock_nsec,
 611             };
 612
 613             pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);
 614             pstrcpy(sn.name, sizeof(sn.name), elem->value->name);
 615             bdrv_snapshot_dump(func_fprintf, f, &sn);
 616             func_fprintf(f, "\n");
 617         }
 618     }
 619
 620     if (info->has_format_specific) {
 621         func_fprintf(f, "Format specific information:\n");
 622         bdrv_image_info_specific_dump(func_fprintf, f, info->format_specific);
 623     }
 624 }