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 #include "sysemu/block-backend.h"
  32
  33 BlockDeviceInfo *bdrv_block_device_info(BlockDriverState *bs)
  34 {
  35     BlockDeviceInfo *info = g_malloc0(sizeof(*info));
  36
  37     info->file                   = g_strdup(bs->filename);
  38     info->ro                     = bs->read_only;
  39     info->drv                    = g_strdup(bs->drv->format_name);
  40     info->encrypted              = bs->encrypted;
  41     info->encryption_key_missing = bdrv_key_required(bs);
  42
  43     info->cache = g_new(BlockdevCacheInfo, 1);
  44     *info->cache = (BlockdevCacheInfo) {
  45         .writeback      = bdrv_enable_write_cache(bs),
  46         .direct         = !!(bs->open_flags & BDRV_O_NOCACHE),
  47         .no_flush       = !!(bs->open_flags & BDRV_O_NO_FLUSH),
  48     };
  49
  50     if (bs->node_name[0]) {
  51         info->has_node_name = true;
  52         info->node_name = g_strdup(bs->node_name);
  53     }
  54
  55     if (bs->backing_file[0]) {
  56         info->has_backing_file = true;
  57         info->backing_file = g_strdup(bs->backing_file);
  58     }
  59
  60     info->backing_file_depth = bdrv_get_backing_file_depth(bs);
  61     info->detect_zeroes = bs->detect_zeroes;
  62
  63     if (bs->io_limits_enabled) {
  64         ThrottleConfig cfg;
  65         throttle_get_config(&bs->throttle_state, &cfg);
  66         info->bps     = cfg.buckets[THROTTLE_BPS_TOTAL].avg;
  67         info->bps_rd  = cfg.buckets[THROTTLE_BPS_READ].avg;
  68         info->bps_wr  = cfg.buckets[THROTTLE_BPS_WRITE].avg;
  69
  70         info->iops    = cfg.buckets[THROTTLE_OPS_TOTAL].avg;
  71         info->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg;
  72         info->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg;
  73
  74         info->has_bps_max     = cfg.buckets[THROTTLE_BPS_TOTAL].max;
  75         info->bps_max         = cfg.buckets[THROTTLE_BPS_TOTAL].max;
  76         info->has_bps_rd_max  = cfg.buckets[THROTTLE_BPS_READ].max;
  77         info->bps_rd_max      = cfg.buckets[THROTTLE_BPS_READ].max;
  78         info->has_bps_wr_max  = cfg.buckets[THROTTLE_BPS_WRITE].max;
  79         info->bps_wr_max      = cfg.buckets[THROTTLE_BPS_WRITE].max;
  80
  81         info->has_iops_max    = cfg.buckets[THROTTLE_OPS_TOTAL].max;
  82         info->iops_max        = cfg.buckets[THROTTLE_OPS_TOTAL].max;
  83         info->has_iops_rd_max = cfg.buckets[THROTTLE_OPS_READ].max;
  84         info->iops_rd_max     = cfg.buckets[THROTTLE_OPS_READ].max;
  85         info->has_iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max;
  86         info->iops_wr_max     = cfg.buckets[THROTTLE_OPS_WRITE].max;
  87
  88         info->has_iops_size = cfg.op_size;
  89         info->iops_size = cfg.op_size;
  90     }
  91
  92     return info;
  93 }
  94
  95 /*
  96  * Returns 0 on success, with *p_list either set to describe snapshot
  97  * information, or NULL because there are no snapshots.  Returns -errno on
  98  * error, with *p_list untouched.
  99  */
 100 int bdrv_query_snapshot_info_list(BlockDriverState *bs,
 101                                   SnapshotInfoList **p_list,
 102                                   Error **errp)
 103 {
 104     int i, sn_count;
 105     QEMUSnapshotInfo *sn_tab = NULL;
 106     SnapshotInfoList *info_list, *cur_item = NULL, *head = NULL;
 107     SnapshotInfo *info;
 108
 109     sn_count = bdrv_snapshot_list(bs, &sn_tab);
 110     if (sn_count < 0) {
 111         const char *dev = bdrv_get_device_name(bs);
 112         switch (sn_count) {
 113         case -ENOMEDIUM:
 114             error_setg(errp, "Device '%s' is not inserted", dev);
 115             break;
 116         case -ENOTSUP:
 117             error_setg(errp,
 118                        "Device '%s' does not support internal snapshots",
 119                        dev);
 120             break;
 121         default:
 122             error_setg_errno(errp, -sn_count,
 123                              "Can't list snapshots of device '%s'", dev);
 124             break;
 125         }
 126         return sn_count;
 127     }
 128
 129     for (i = 0; i < sn_count; i++) {
 130         info = g_new0(SnapshotInfo, 1);
 131         info->id            = g_strdup(sn_tab[i].id_str);
 132         info->name          = g_strdup(sn_tab[i].name);
 133         info->vm_state_size = sn_tab[i].vm_state_size;
 134         info->date_sec      = sn_tab[i].date_sec;
 135         info->date_nsec     = sn_tab[i].date_nsec;
 136         info->vm_clock_sec  = sn_tab[i].vm_clock_nsec / 1000000000;
 137         info->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
 138
 139         info_list = g_new0(SnapshotInfoList, 1);
 140         info_list->value = info;
 141
 142         /* XXX: waiting for the qapi to support qemu-queue.h types */
 143         if (!cur_item) {
 144             head = cur_item = info_list;
 145         } else {
 146             cur_item->next = info_list;
 147             cur_item = info_list;
 148         }
 149
 150     }
 151
 152     g_free(sn_tab);
 153     *p_list = head;
 154     return 0;
 155 }
 156
 157 /**
 158  * bdrv_query_image_info:
 159  * @bs: block device to examine
 160  * @p_info: location to store image information
 161  * @errp: location to store error information
 162  *
 163  * Store "flat" image information in @p_info.
 164  *
 165  * "Flat" means it does *not* query backing image information,
 166  * i.e. (*pinfo)->has_backing_image will be set to false and
 167  * (*pinfo)->backing_image to NULL even when the image does in fact have
 168  * a backing image.
 169  *
 170  * @p_info will be set only on success. On error, store error in @errp.
 171  */
 172 void bdrv_query_image_info(BlockDriverState *bs,
 173                            ImageInfo **p_info,
 174                            Error **errp)
 175 {
 176     int64_t size;
 177     const char *backing_filename;
 178     char backing_filename2[1024];
 179     BlockDriverInfo bdi;
 180     int ret;
 181     Error *err = NULL;
 182     ImageInfo *info;
 183
 184     size = bdrv_getlength(bs);
 185     if (size < 0) {
 186         error_setg_errno(errp, -size, "Can't get size of device '%s'",
 187                          bdrv_get_device_name(bs));
 188         return;
 189     }
 190
 191     info = g_new0(ImageInfo, 1);
 192     info->filename        = g_strdup(bs->filename);
 193     info->format          = g_strdup(bdrv_get_format_name(bs));
 194     info->virtual_size    = size;
 195     info->actual_size     = bdrv_get_allocated_file_size(bs);
 196     info->has_actual_size = info->actual_size >= 0;
 197     if (bdrv_is_encrypted(bs)) {
 198         info->encrypted = true;
 199         info->has_encrypted = true;
 200     }
 201     if (bdrv_get_info(bs, &bdi) >= 0) {
 202         if (bdi.cluster_size != 0) {
 203             info->cluster_size = bdi.cluster_size;
 204             info->has_cluster_size = true;
 205         }
 206         info->dirty_flag = bdi.is_dirty;
 207         info->has_dirty_flag = true;
 208     }
 209     info->format_specific     = bdrv_get_specific_info(bs);
 210     info->has_format_specific = info->format_specific != NULL;
 211
 212     backing_filename = bs->backing_file;
 213     if (backing_filename[0] != '\0') {
 214         info->backing_filename = g_strdup(backing_filename);
 215         info->has_backing_filename = true;
 216         bdrv_get_full_backing_filename(bs, backing_filename2,
 217                                        sizeof(backing_filename2));
 218
 219         if (strcmp(backing_filename, backing_filename2) != 0) {
 220             info->full_backing_filename =
 221                         g_strdup(backing_filename2);
 222             info->has_full_backing_filename = true;
 223         }
 224
 225         if (bs->backing_format[0]) {
 226             info->backing_filename_format = g_strdup(bs->backing_format);
 227             info->has_backing_filename_format = true;
 228         }
 229     }
 230
 231     ret = bdrv_query_snapshot_info_list(bs, &info->snapshots, &err);
 232     switch (ret) {
 233     case 0:
 234         if (info->snapshots) {
 235             info->has_snapshots = true;
 236         }
 237         break;
 238     /* recoverable error */
 239     case -ENOMEDIUM:
 240     case -ENOTSUP:
 241         error_free(err);
 242         break;
 243     default:
 244         error_propagate(errp, err);
 245         qapi_free_ImageInfo(info);
 246         return;
 247     }
 248
 249     *p_info = info;
 250 }
 251
 252 /* @p_info will be set only on success. */
 253 static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
 254                             Error **errp)
 255 {
 256     BlockInfo *info = g_malloc0(sizeof(*info));
 257     BlockDriverState *bs = blk_bs(blk);
 258     BlockDriverState *bs0;
 259     ImageInfo **p_image_info;
 260     Error *local_err = NULL;
 261     info->device = g_strdup(blk_name(blk));
 262     info->type = g_strdup("unknown");
 263     info->locked = blk_dev_is_medium_locked(blk);
 264     info->removable = blk_dev_has_removable_media(blk);
 265
 266     if (blk_dev_has_removable_media(blk)) {
 267         info->has_tray_open = true;
 268         info->tray_open = blk_dev_is_tray_open(blk);
 269     }
 270
 271     if (bdrv_iostatus_is_enabled(bs)) {
 272         info->has_io_status = true;
 273         info->io_status = bs->iostatus;
 274     }
 275
 276     if (!QLIST_EMPTY(&bs->dirty_bitmaps)) {
 277         info->has_dirty_bitmaps = true;
 278         info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
 279     }
 280
 281     if (bs->drv) {
 282         info->has_inserted = true;
 283         info->inserted = bdrv_block_device_info(bs);
 284
 285         bs0 = bs;
 286         p_image_info = &info->inserted->image;
 287         while (1) {
 288             bdrv_query_image_info(bs0, p_image_info, &local_err);
 289             if (local_err) {
 290                 error_propagate(errp, local_err);
 291                 goto err;
 292             }
 293             if (bs0->drv && bs0->backing_hd) {
 294                 bs0 = bs0->backing_hd;
 295                 (*p_image_info)->has_backing_image = true;
 296                 p_image_info = &((*p_image_info)->backing_image);
 297             } else {
 298                 break;
 299             }
 300         }
 301     }
 302
 303     *p_info = info;
 304     return;
 305
 306  err:
 307     qapi_free_BlockInfo(info);
 308 }
 309
 310 static BlockStats *bdrv_query_stats(const BlockDriverState *bs,
 311                                     bool query_backing)
 312 {
 313     BlockStats *s;
 314
 315     s = g_malloc0(sizeof(*s));
 316
 317     if (bdrv_get_device_name(bs)[0]) {
 318         s->has_device = true;
 319         s->device = g_strdup(bdrv_get_device_name(bs));
 320     }
 321
 322     if (bdrv_get_node_name(bs)[0]) {
 323         s->has_node_name = true;
 324         s->node_name = g_strdup(bdrv_get_node_name(bs));
 325     }
 326
 327     s->stats = g_malloc0(sizeof(*s->stats));
 328     s->stats->rd_bytes = bs->stats.nr_bytes[BLOCK_ACCT_READ];
 329     s->stats->wr_bytes = bs->stats.nr_bytes[BLOCK_ACCT_WRITE];
 330     s->stats->rd_operations = bs->stats.nr_ops[BLOCK_ACCT_READ];
 331     s->stats->wr_operations = bs->stats.nr_ops[BLOCK_ACCT_WRITE];
 332     s->stats->wr_highest_offset =
 333         bs->stats.wr_highest_sector * BDRV_SECTOR_SIZE;
 334     s->stats->flush_operations = bs->stats.nr_ops[BLOCK_ACCT_FLUSH];
 335     s->stats->wr_total_time_ns = bs->stats.total_time_ns[BLOCK_ACCT_WRITE];
 336     s->stats->rd_total_time_ns = bs->stats.total_time_ns[BLOCK_ACCT_READ];
 337     s->stats->flush_total_time_ns = bs->stats.total_time_ns[BLOCK_ACCT_FLUSH];
 338
 339     if (bs->file) {
 340         s->has_parent = true;
 341         s->parent = bdrv_query_stats(bs->file, query_backing);
 342     }
 343
 344     if (query_backing && bs->backing_hd) {
 345         s->has_backing = true;
 346         s->backing = bdrv_query_stats(bs->backing_hd, query_backing);
 347     }
 348
 349     return s;
 350 }
 351
 352 BlockInfoList *qmp_query_block(Error **errp)
 353 {
 354     BlockInfoList *head = NULL, **p_next = &head;
 355     BlockBackend *blk;
 356     Error *local_err = NULL;
 357
 358     for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
 359         BlockInfoList *info = g_malloc0(sizeof(*info));
 360         bdrv_query_info(blk, &info->value, &local_err);
 361         if (local_err) {
 362             error_propagate(errp, local_err);
 363             goto err;
 364         }
 365
 366         *p_next = info;
 367         p_next = &info->next;
 368     }
 369
 370     return head;
 371
 372  err:
 373     qapi_free_BlockInfoList(head);
 374     return NULL;
 375 }
 376
 377 BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
 378                                      bool query_nodes,
 379                                      Error **errp)
 380 {
 381     BlockStatsList *head = NULL, **p_next = &head;
 382     BlockDriverState *bs = NULL;
 383
 384     /* Just to be safe if query_nodes is not always initialized */
 385     query_nodes = has_query_nodes && query_nodes;
 386
 387     while ((bs = query_nodes ? bdrv_next_node(bs) : bdrv_next(bs))) {
 388         BlockStatsList *info = g_malloc0(sizeof(*info));
 389         AioContext *ctx = bdrv_get_aio_context(bs);
 390
 391         aio_context_acquire(ctx);
 392         info->value = bdrv_query_stats(bs, !query_nodes);
 393         aio_context_release(ctx);
 394
 395         *p_next = info;
 396         p_next = &info->next;
 397     }
 398
 399     return head;
 400 }
 401
 402 #define NB_SUFFIXES 4
 403
 404 static char *get_human_readable_size(char *buf, int buf_size, int64_t size)
 405 {
 406     static const char suffixes[NB_SUFFIXES] = "KMGT";
 407     int64_t base;
 408     int i;
 409
 410     if (size <= 999) {
 411         snprintf(buf, buf_size, "%" PRId64, size);
 412     } else {
 413         base = 1024;
 414         for (i = 0; i < NB_SUFFIXES; i++) {
 415             if (size < (10 * base)) {
 416                 snprintf(buf, buf_size, "%0.1f%c",
 417                          (double)size / base,
 418                          suffixes[i]);
 419                 break;
 420             } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) {
 421                 snprintf(buf, buf_size, "%" PRId64 "%c",
 422                          ((size + (base >> 1)) / base),
 423                          suffixes[i]);
 424                 break;
 425             }
 426             base = base * 1024;
 427         }
 428     }
 429     return buf;
 430 }
 431
 432 void bdrv_snapshot_dump(fprintf_function func_fprintf, void *f,
 433                         QEMUSnapshotInfo *sn)
 434 {
 435     char buf1[128], date_buf[128], clock_buf[128];
 436     struct tm tm;
 437     time_t ti;
 438     int64_t secs;
 439
 440     if (!sn) {
 441         func_fprintf(f,
 442                      "%-10s%-20s%7s%20s%15s",
 443                      "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK");
 444     } else {
 445         ti = sn->date_sec;
 446         localtime_r(&ti, &tm);
 447         strftime(date_buf, sizeof(date_buf),
 448                  "%Y-%m-%d %H:%M:%S", &tm);
 449         secs = sn->vm_clock_nsec / 1000000000;
 450         snprintf(clock_buf, sizeof(clock_buf),
 451                  "%02d:%02d:%02d.%03d",
 452                  (int)(secs / 3600),
 453                  (int)((secs / 60) % 60),
 454                  (int)(secs % 60),
 455                  (int)((sn->vm_clock_nsec / 1000000) % 1000));
 456         func_fprintf(f,
 457                      "%-10s%-20s%7s%20s%15s",
 458                      sn->id_str, sn->name,
 459                      get_human_readable_size(buf1, sizeof(buf1),
 460                                              sn->vm_state_size),
 461                      date_buf,
 462                      clock_buf);
 463     }
 464 }
 465
 466 static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation,
 467                        QDict *dict);
 468 static void dump_qlist(fprintf_function func_fprintf, void *f, int indentation,
 469                        QList *list);
 470
 471 static void dump_qobject(fprintf_function func_fprintf, void *f,
 472                          int comp_indent, QObject *obj)
 473 {
 474     switch (qobject_type(obj)) {
 475         case QTYPE_QINT: {
 476             QInt *value = qobject_to_qint(obj);
 477             func_fprintf(f, "%" PRId64, qint_get_int(value));
 478             break;
 479         }
 480         case QTYPE_QSTRING: {
 481             QString *value = qobject_to_qstring(obj);
 482             func_fprintf(f, "%s", qstring_get_str(value));
 483             break;
 484         }
 485         case QTYPE_QDICT: {
 486             QDict *value = qobject_to_qdict(obj);
 487             dump_qdict(func_fprintf, f, comp_indent, value);
 488             break;
 489         }
 490         case QTYPE_QLIST: {
 491             QList *value = qobject_to_qlist(obj);
 492             dump_qlist(func_fprintf, f, comp_indent, value);
 493             break;
 494         }
 495         case QTYPE_QFLOAT: {
 496             QFloat *value = qobject_to_qfloat(obj);
 497             func_fprintf(f, "%g", qfloat_get_double(value));
 498             break;
 499         }
 500         case QTYPE_QBOOL: {
 501             QBool *value = qobject_to_qbool(obj);
 502             func_fprintf(f, "%s", qbool_get_int(value) ? "true" : "false");
 503             break;
 504         }
 505         case QTYPE_QERROR: {
 506             QString *value = qerror_human((QError *)obj);
 507             func_fprintf(f, "%s", qstring_get_str(value));
 508             QDECREF(value);
 509             break;
 510         }
 511         case QTYPE_NONE:
 512             break;
 513         case QTYPE_MAX:
 514         default:
 515             abort();
 516     }
 517 }
 518
 519 static void dump_qlist(fprintf_function func_fprintf, void *f, int indentation,
 520                        QList *list)
 521 {
 522     const QListEntry *entry;
 523     int i = 0;
 524
 525     for (entry = qlist_first(list); entry; entry = qlist_next(entry), i++) {
 526         qtype_code type = qobject_type(entry->value);
 527         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 528         const char *format = composite ? "%*s[%i]:\n" : "%*s[%i]: ";
 529
 530         func_fprintf(f, format, indentation * 4, "", i);
 531         dump_qobject(func_fprintf, f, indentation + 1, entry->value);
 532         if (!composite) {
 533             func_fprintf(f, "\n");
 534         }
 535     }
 536 }
 537
 538 static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation,
 539                        QDict *dict)
 540 {
 541     const QDictEntry *entry;
 542
 543     for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) {
 544         qtype_code type = qobject_type(entry->value);
 545         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 546         const char *format = composite ? "%*s%s:\n" : "%*s%s: ";
 547         char key[strlen(entry->key) + 1];
 548         int i;
 549
 550         /* replace dashes with spaces in key (variable) names */
 551         for (i = 0; entry->key[i]; i++) {
 552             key[i] = entry->key[i] == '-' ? ' ' : entry->key[i];
 553         }
 554         key[i] = 0;
 555
 556         func_fprintf(f, format, indentation * 4, "", key);
 557         dump_qobject(func_fprintf, f, indentation + 1, entry->value);
 558         if (!composite) {
 559             func_fprintf(f, "\n");
 560         }
 561     }
 562 }
 563
 564 void bdrv_image_info_specific_dump(fprintf_function func_fprintf, void *f,
 565                                    ImageInfoSpecific *info_spec)
 566 {
 567     QmpOutputVisitor *ov = qmp_output_visitor_new();
 568     QObject *obj, *data;
 569
 570     visit_type_ImageInfoSpecific(qmp_output_get_visitor(ov), &info_spec, NULL,
 571                                  &error_abort);
 572     obj = qmp_output_get_qobject(ov);
 573     assert(qobject_type(obj) == QTYPE_QDICT);
 574     data = qdict_get(qobject_to_qdict(obj), "data");
 575     dump_qobject(func_fprintf, f, 1, data);
 576     qmp_output_visitor_cleanup(ov);
 577 }
 578
 579 void bdrv_image_info_dump(fprintf_function func_fprintf, void *f,
 580                           ImageInfo *info)
 581 {
 582     char size_buf[128], dsize_buf[128];
 583     if (!info->has_actual_size) {
 584         snprintf(dsize_buf, sizeof(dsize_buf), "unavailable");
 585     } else {
 586         get_human_readable_size(dsize_buf, sizeof(dsize_buf),
 587                                 info->actual_size);
 588     }
 589     get_human_readable_size(size_buf, sizeof(size_buf), info->virtual_size);
 590     func_fprintf(f,
 591                  "image: %s\n"
 592                  "file format: %s\n"
 593                  "virtual size: %s (%" PRId64 " bytes)\n"
 594                  "disk size: %s\n",
 595                  info->filename, info->format, size_buf,
 596                  info->virtual_size,
 597                  dsize_buf);
 598
 599     if (info->has_encrypted && info->encrypted) {
 600         func_fprintf(f, "encrypted: yes\n");
 601     }
 602
 603     if (info->has_cluster_size) {
 604         func_fprintf(f, "cluster_size: %" PRId64 "\n",
 605                        info->cluster_size);
 606     }
 607
 608     if (info->has_dirty_flag && info->dirty_flag) {
 609         func_fprintf(f, "cleanly shut down: no\n");
 610     }
 611
 612     if (info->has_backing_filename) {
 613         func_fprintf(f, "backing file: %s", info->backing_filename);
 614         if (info->has_full_backing_filename) {
 615             func_fprintf(f, " (actual path: %s)", info->full_backing_filename);
 616         }
 617         func_fprintf(f, "\n");
 618         if (info->has_backing_filename_format) {
 619             func_fprintf(f, "backing file format: %s\n",
 620                          info->backing_filename_format);
 621         }
 622     }
 623
 624     if (info->has_snapshots) {
 625         SnapshotInfoList *elem;
 626
 627         func_fprintf(f, "Snapshot list:\n");
 628         bdrv_snapshot_dump(func_fprintf, f, NULL);
 629         func_fprintf(f, "\n");
 630
 631         /* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but
 632          * we convert to the block layer's native QEMUSnapshotInfo for now.
 633          */
 634         for (elem = info->snapshots; elem; elem = elem->next) {
 635             QEMUSnapshotInfo sn = {
 636                 .vm_state_size = elem->value->vm_state_size,
 637                 .date_sec = elem->value->date_sec,
 638                 .date_nsec = elem->value->date_nsec,
 639                 .vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +
 640                                  elem->value->vm_clock_nsec,
 641             };
 642
 643             pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);
 644             pstrcpy(sn.name, sizeof(sn.name), elem->value->name);
 645             bdrv_snapshot_dump(func_fprintf, f, &sn);
 646             func_fprintf(f, "\n");
 647         }
 648     }
 649
 650     if (info->has_format_specific) {
 651         func_fprintf(f, "Format specific information:\n");
 652         bdrv_image_info_specific_dump(func_fprintf, f, info->format_specific);
 653     }
 654 }