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