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 "qemu/cutils.h"
  27 #include "block/qapi.h"
  28 #include "block/block_int.h"
  29 #include "block/throttle-groups.h"
  30 #include "block/write-threshold.h"
  31 #include "qapi/error.h"
  32 #include "qapi/qapi-commands-block-core.h"
  33 #include "qapi/qobject-output-visitor.h"
  34 #include "qapi/qapi-visit-block-core.h"
  35 #include "qapi/qmp/qbool.h"
  36 #include "qapi/qmp/qdict.h"
  37 #include "qapi/qmp/qlist.h"
  38 #include "qapi/qmp/qnum.h"
  39 #include "qapi/qmp/qstring.h"
  40 #include "qemu/qemu-print.h"
  41 #include "sysemu/block-backend.h"
  42 #include "qemu/cutils.h"
  43
  44 BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
  45                                         BlockDriverState *bs, Error **errp)
  46 {
  47     ImageInfo **p_image_info;
  48     BlockDriverState *bs0;
  49     BlockDeviceInfo *info;
  50
  51     if (!bs->drv) {
  52         error_setg(errp, "Block device %s is ejected", bs->node_name);
  53         return NULL;
  54     }
  55
  56     bdrv_refresh_filename(bs);
  57
  58     info = g_malloc0(sizeof(*info));
  59     info->file                   = g_strdup(bs->filename);
  60     info->ro                     = bs->read_only;
  61     info->drv                    = g_strdup(bs->drv->format_name);
  62     info->encrypted              = bs->encrypted;
  63     info->encryption_key_missing = false;
  64
  65     info->cache = g_new(BlockdevCacheInfo, 1);
  66     *info->cache = (BlockdevCacheInfo) {
  67         .writeback      = blk ? blk_enable_write_cache(blk) : true,
  68         .direct         = !!(bs->open_flags & BDRV_O_NOCACHE),
  69         .no_flush       = !!(bs->open_flags & BDRV_O_NO_FLUSH),
  70     };
  71
  72     if (bs->node_name[0]) {
  73         info->has_node_name = true;
  74         info->node_name = g_strdup(bs->node_name);
  75     }
  76
  77     if (bs->backing_file[0]) {
  78         info->has_backing_file = true;
  79         info->backing_file = g_strdup(bs->backing_file);
  80     }
  81
  82     if (!QLIST_EMPTY(&bs->dirty_bitmaps)) {
  83         info->has_dirty_bitmaps = true;
  84         info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
  85     }
  86
  87     info->detect_zeroes = bs->detect_zeroes;
  88
  89     if (blk && blk_get_public(blk)->throttle_group_member.throttle_state) {
  90         ThrottleConfig cfg;
  91         BlockBackendPublic *blkp = blk_get_public(blk);
  92
  93         throttle_group_get_config(&blkp->throttle_group_member, &cfg);
  94
  95         info->bps     = cfg.buckets[THROTTLE_BPS_TOTAL].avg;
  96         info->bps_rd  = cfg.buckets[THROTTLE_BPS_READ].avg;
  97         info->bps_wr  = cfg.buckets[THROTTLE_BPS_WRITE].avg;
  98
  99         info->iops    = cfg.buckets[THROTTLE_OPS_TOTAL].avg;
 100         info->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg;
 101         info->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg;
 102
 103         info->has_bps_max     = cfg.buckets[THROTTLE_BPS_TOTAL].max;
 104         info->bps_max         = cfg.buckets[THROTTLE_BPS_TOTAL].max;
 105         info->has_bps_rd_max  = cfg.buckets[THROTTLE_BPS_READ].max;
 106         info->bps_rd_max      = cfg.buckets[THROTTLE_BPS_READ].max;
 107         info->has_bps_wr_max  = cfg.buckets[THROTTLE_BPS_WRITE].max;
 108         info->bps_wr_max      = cfg.buckets[THROTTLE_BPS_WRITE].max;
 109
 110         info->has_iops_max    = cfg.buckets[THROTTLE_OPS_TOTAL].max;
 111         info->iops_max        = cfg.buckets[THROTTLE_OPS_TOTAL].max;
 112         info->has_iops_rd_max = cfg.buckets[THROTTLE_OPS_READ].max;
 113         info->iops_rd_max     = cfg.buckets[THROTTLE_OPS_READ].max;
 114         info->has_iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max;
 115         info->iops_wr_max     = cfg.buckets[THROTTLE_OPS_WRITE].max;
 116
 117         info->has_bps_max_length     = info->has_bps_max;
 118         info->bps_max_length         =
 119             cfg.buckets[THROTTLE_BPS_TOTAL].burst_length;
 120         info->has_bps_rd_max_length  = info->has_bps_rd_max;
 121         info->bps_rd_max_length      =
 122             cfg.buckets[THROTTLE_BPS_READ].burst_length;
 123         info->has_bps_wr_max_length  = info->has_bps_wr_max;
 124         info->bps_wr_max_length      =
 125             cfg.buckets[THROTTLE_BPS_WRITE].burst_length;
 126
 127         info->has_iops_max_length    = info->has_iops_max;
 128         info->iops_max_length        =
 129             cfg.buckets[THROTTLE_OPS_TOTAL].burst_length;
 130         info->has_iops_rd_max_length = info->has_iops_rd_max;
 131         info->iops_rd_max_length     =
 132             cfg.buckets[THROTTLE_OPS_READ].burst_length;
 133         info->has_iops_wr_max_length = info->has_iops_wr_max;
 134         info->iops_wr_max_length     =
 135             cfg.buckets[THROTTLE_OPS_WRITE].burst_length;
 136
 137         info->has_iops_size = cfg.op_size;
 138         info->iops_size = cfg.op_size;
 139
 140         info->has_group = true;
 141         info->group =
 142             g_strdup(throttle_group_get_name(&blkp->throttle_group_member));
 143     }
 144
 145     info->write_threshold = bdrv_write_threshold_get(bs);
 146
 147     bs0 = bs;
 148     p_image_info = &info->image;
 149     info->backing_file_depth = 0;
 150     while (1) {
 151         Error *local_err = NULL;
 152         bdrv_query_image_info(bs0, p_image_info, &local_err);
 153         if (local_err) {
 154             error_propagate(errp, local_err);
 155             qapi_free_BlockDeviceInfo(info);
 156             return NULL;
 157         }
 158
 159         if (bs0->drv && bs0->backing) {
 160             info->backing_file_depth++;
 161             bs0 = bs0->backing->bs;
 162             (*p_image_info)->has_backing_image = true;
 163             p_image_info = &((*p_image_info)->backing_image);
 164         } else {
 165             break;
 166         }
 167
 168         /* Skip automatically inserted nodes that the user isn't aware of for
 169          * query-block (blk != NULL), but not for query-named-block-nodes */
 170         while (blk && bs0->drv && bs0->implicit) {
 171             bs0 = backing_bs(bs0);
 172             assert(bs0);
 173         }
 174     }
 175
 176     return info;
 177 }
 178
 179 /*
 180  * Returns 0 on success, with *p_list either set to describe snapshot
 181  * information, or NULL because there are no snapshots.  Returns -errno on
 182  * error, with *p_list untouched.
 183  */
 184 int bdrv_query_snapshot_info_list(BlockDriverState *bs,
 185                                   SnapshotInfoList **p_list,
 186                                   Error **errp)
 187 {
 188     int i, sn_count;
 189     QEMUSnapshotInfo *sn_tab = NULL;
 190     SnapshotInfoList *info_list, *cur_item = NULL, *head = NULL;
 191     SnapshotInfo *info;
 192
 193     sn_count = bdrv_snapshot_list(bs, &sn_tab);
 194     if (sn_count < 0) {
 195         const char *dev = bdrv_get_device_name(bs);
 196         switch (sn_count) {
 197         case -ENOMEDIUM:
 198             error_setg(errp, "Device '%s' is not inserted", dev);
 199             break;
 200         case -ENOTSUP:
 201             error_setg(errp,
 202                        "Device '%s' does not support internal snapshots",
 203                        dev);
 204             break;
 205         default:
 206             error_setg_errno(errp, -sn_count,
 207                              "Can't list snapshots of device '%s'", dev);
 208             break;
 209         }
 210         return sn_count;
 211     }
 212
 213     for (i = 0; i < sn_count; i++) {
 214         info = g_new0(SnapshotInfo, 1);
 215         info->id            = g_strdup(sn_tab[i].id_str);
 216         info->name          = g_strdup(sn_tab[i].name);
 217         info->vm_state_size = sn_tab[i].vm_state_size;
 218         info->date_sec      = sn_tab[i].date_sec;
 219         info->date_nsec     = sn_tab[i].date_nsec;
 220         info->vm_clock_sec  = sn_tab[i].vm_clock_nsec / 1000000000;
 221         info->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
 222
 223         info_list = g_new0(SnapshotInfoList, 1);
 224         info_list->value = info;
 225
 226         /* XXX: waiting for the qapi to support qemu-queue.h types */
 227         if (!cur_item) {
 228             head = cur_item = info_list;
 229         } else {
 230             cur_item->next = info_list;
 231             cur_item = info_list;
 232         }
 233
 234     }
 235
 236     g_free(sn_tab);
 237     *p_list = head;
 238     return 0;
 239 }
 240
 241 /**
 242  * bdrv_query_image_info:
 243  * @bs: block device to examine
 244  * @p_info: location to store image information
 245  * @errp: location to store error information
 246  *
 247  * Store "flat" image information in @p_info.
 248  *
 249  * "Flat" means it does *not* query backing image information,
 250  * i.e. (*pinfo)->has_backing_image will be set to false and
 251  * (*pinfo)->backing_image to NULL even when the image does in fact have
 252  * a backing image.
 253  *
 254  * @p_info will be set only on success. On error, store error in @errp.
 255  */
 256 void bdrv_query_image_info(BlockDriverState *bs,
 257                            ImageInfo **p_info,
 258                            Error **errp)
 259 {
 260     int64_t size;
 261     const char *backing_filename;
 262     BlockDriverInfo bdi;
 263     int ret;
 264     Error *err = NULL;
 265     ImageInfo *info;
 266
 267     aio_context_acquire(bdrv_get_aio_context(bs));
 268
 269     size = bdrv_getlength(bs);
 270     if (size < 0) {
 271         error_setg_errno(errp, -size, "Can't get image size '%s'",
 272                          bs->exact_filename);
 273         goto out;
 274     }
 275
 276     bdrv_refresh_filename(bs);
 277
 278     info = g_new0(ImageInfo, 1);
 279     info->filename        = g_strdup(bs->filename);
 280     info->format          = g_strdup(bdrv_get_format_name(bs));
 281     info->virtual_size    = size;
 282     info->actual_size     = bdrv_get_allocated_file_size(bs);
 283     info->has_actual_size = info->actual_size >= 0;
 284     if (bdrv_is_encrypted(bs)) {
 285         info->encrypted = true;
 286         info->has_encrypted = true;
 287     }
 288     if (bdrv_get_info(bs, &bdi) >= 0) {
 289         if (bdi.cluster_size != 0) {
 290             info->cluster_size = bdi.cluster_size;
 291             info->has_cluster_size = true;
 292         }
 293         info->dirty_flag = bdi.is_dirty;
 294         info->has_dirty_flag = true;
 295     }
 296     info->format_specific = bdrv_get_specific_info(bs, &err);
 297     if (err) {
 298         error_propagate(errp, err);
 299         qapi_free_ImageInfo(info);
 300         goto out;
 301     }
 302     info->has_format_specific = info->format_specific != NULL;
 303
 304     backing_filename = bs->backing_file;
 305     if (backing_filename[0] != '\0') {
 306         char *backing_filename2;
 307         info->backing_filename = g_strdup(backing_filename);
 308         info->has_backing_filename = true;
 309         backing_filename2 = bdrv_get_full_backing_filename(bs, NULL);
 310
 311         /* Always report the full_backing_filename if present, even if it's the
 312          * same as backing_filename. That they are same is useful info. */
 313         if (backing_filename2) {
 314             info->full_backing_filename = g_strdup(backing_filename2);
 315             info->has_full_backing_filename = true;
 316         }
 317
 318         if (bs->backing_format[0]) {
 319             info->backing_filename_format = g_strdup(bs->backing_format);
 320             info->has_backing_filename_format = true;
 321         }
 322         g_free(backing_filename2);
 323     }
 324
 325     ret = bdrv_query_snapshot_info_list(bs, &info->snapshots, &err);
 326     switch (ret) {
 327     case 0:
 328         if (info->snapshots) {
 329             info->has_snapshots = true;
 330         }
 331         break;
 332     /* recoverable error */
 333     case -ENOMEDIUM:
 334     case -ENOTSUP:
 335         error_free(err);
 336         break;
 337     default:
 338         error_propagate(errp, err);
 339         qapi_free_ImageInfo(info);
 340         goto out;
 341     }
 342
 343     *p_info = info;
 344
 345 out:
 346     aio_context_release(bdrv_get_aio_context(bs));
 347 }
 348
 349 /* @p_info will be set only on success. */
 350 static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
 351                             Error **errp)
 352 {
 353     BlockInfo *info = g_malloc0(sizeof(*info));
 354     BlockDriverState *bs = blk_bs(blk);
 355     char *qdev;
 356
 357     /* Skip automatically inserted nodes that the user isn't aware of */
 358     while (bs && bs->drv && bs->implicit) {
 359         bs = backing_bs(bs);
 360     }
 361
 362     info->device = g_strdup(blk_name(blk));
 363     info->type = g_strdup("unknown");
 364     info->locked = blk_dev_is_medium_locked(blk);
 365     info->removable = blk_dev_has_removable_media(blk);
 366
 367     qdev = blk_get_attached_dev_id(blk);
 368     if (qdev && *qdev) {
 369         info->has_qdev = true;
 370         info->qdev = qdev;
 371     } else {
 372         g_free(qdev);
 373     }
 374
 375     if (blk_dev_has_tray(blk)) {
 376         info->has_tray_open = true;
 377         info->tray_open = blk_dev_is_tray_open(blk);
 378     }
 379
 380     if (blk_iostatus_is_enabled(blk)) {
 381         info->has_io_status = true;
 382         info->io_status = blk_iostatus(blk);
 383     }
 384
 385     if (bs && !QLIST_EMPTY(&bs->dirty_bitmaps)) {
 386         info->has_dirty_bitmaps = true;
 387         info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
 388     }
 389
 390     if (bs && bs->drv) {
 391         info->has_inserted = true;
 392         info->inserted = bdrv_block_device_info(blk, bs, errp);
 393         if (info->inserted == NULL) {
 394             goto err;
 395         }
 396     }
 397
 398     *p_info = info;
 399     return;
 400
 401  err:
 402     qapi_free_BlockInfo(info);
 403 }
 404
 405 static uint64List *uint64_list(uint64_t *list, int size)
 406 {
 407     int i;
 408     uint64List *out_list = NULL;
 409     uint64List **pout_list = &out_list;
 410
 411     for (i = 0; i < size; i++) {
 412         uint64List *entry = g_new(uint64List, 1);
 413         entry->value = list[i];
 414         *pout_list = entry;
 415         pout_list = &entry->next;
 416     }
 417
 418     *pout_list = NULL;
 419
 420     return out_list;
 421 }
 422
 423 static void bdrv_latency_histogram_stats(BlockLatencyHistogram *hist,
 424                                          bool *not_null,
 425                                          BlockLatencyHistogramInfo **info)
 426 {
 427     *not_null = hist->bins != NULL;
 428     if (*not_null) {
 429         *info = g_new0(BlockLatencyHistogramInfo, 1);
 430
 431         (*info)->boundaries = uint64_list(hist->boundaries, hist->nbins - 1);
 432         (*info)->bins = uint64_list(hist->bins, hist->nbins);
 433     }
 434 }
 435
 436 static void bdrv_query_blk_stats(BlockDeviceStats *ds, BlockBackend *blk)
 437 {
 438     BlockAcctStats *stats = blk_get_stats(blk);
 439     BlockAcctTimedStats *ts = NULL;
 440
 441     ds->rd_bytes = stats->nr_bytes[BLOCK_ACCT_READ];
 442     ds->wr_bytes = stats->nr_bytes[BLOCK_ACCT_WRITE];
 443     ds->unmap_bytes = stats->nr_bytes[BLOCK_ACCT_UNMAP];
 444     ds->rd_operations = stats->nr_ops[BLOCK_ACCT_READ];
 445     ds->wr_operations = stats->nr_ops[BLOCK_ACCT_WRITE];
 446     ds->unmap_operations = stats->nr_ops[BLOCK_ACCT_UNMAP];
 447
 448     ds->failed_rd_operations = stats->failed_ops[BLOCK_ACCT_READ];
 449     ds->failed_wr_operations = stats->failed_ops[BLOCK_ACCT_WRITE];
 450     ds->failed_flush_operations = stats->failed_ops[BLOCK_ACCT_FLUSH];
 451     ds->failed_unmap_operations = stats->failed_ops[BLOCK_ACCT_UNMAP];
 452
 453     ds->invalid_rd_operations = stats->invalid_ops[BLOCK_ACCT_READ];
 454     ds->invalid_wr_operations = stats->invalid_ops[BLOCK_ACCT_WRITE];
 455     ds->invalid_flush_operations =
 456         stats->invalid_ops[BLOCK_ACCT_FLUSH];
 457     ds->invalid_unmap_operations = stats->invalid_ops[BLOCK_ACCT_UNMAP];
 458
 459     ds->rd_merged = stats->merged[BLOCK_ACCT_READ];
 460     ds->wr_merged = stats->merged[BLOCK_ACCT_WRITE];
 461     ds->unmap_merged = stats->merged[BLOCK_ACCT_UNMAP];
 462     ds->flush_operations = stats->nr_ops[BLOCK_ACCT_FLUSH];
 463     ds->wr_total_time_ns = stats->total_time_ns[BLOCK_ACCT_WRITE];
 464     ds->rd_total_time_ns = stats->total_time_ns[BLOCK_ACCT_READ];
 465     ds->flush_total_time_ns = stats->total_time_ns[BLOCK_ACCT_FLUSH];
 466     ds->unmap_total_time_ns = stats->total_time_ns[BLOCK_ACCT_UNMAP];
 467
 468     ds->has_idle_time_ns = stats->last_access_time_ns > 0;
 469     if (ds->has_idle_time_ns) {
 470         ds->idle_time_ns = block_acct_idle_time_ns(stats);
 471     }
 472
 473     ds->account_invalid = stats->account_invalid;
 474     ds->account_failed = stats->account_failed;
 475
 476     while ((ts = block_acct_interval_next(stats, ts))) {
 477         BlockDeviceTimedStatsList *timed_stats =
 478             g_malloc0(sizeof(*timed_stats));
 479         BlockDeviceTimedStats *dev_stats = g_malloc0(sizeof(*dev_stats));
 480         timed_stats->next = ds->timed_stats;
 481         timed_stats->value = dev_stats;
 482         ds->timed_stats = timed_stats;
 483
 484         TimedAverage *rd = &ts->latency[BLOCK_ACCT_READ];
 485         TimedAverage *wr = &ts->latency[BLOCK_ACCT_WRITE];
 486         TimedAverage *fl = &ts->latency[BLOCK_ACCT_FLUSH];
 487
 488         dev_stats->interval_length = ts->interval_length;
 489
 490         dev_stats->min_rd_latency_ns = timed_average_min(rd);
 491         dev_stats->max_rd_latency_ns = timed_average_max(rd);
 492         dev_stats->avg_rd_latency_ns = timed_average_avg(rd);
 493
 494         dev_stats->min_wr_latency_ns = timed_average_min(wr);
 495         dev_stats->max_wr_latency_ns = timed_average_max(wr);
 496         dev_stats->avg_wr_latency_ns = timed_average_avg(wr);
 497
 498         dev_stats->min_flush_latency_ns = timed_average_min(fl);
 499         dev_stats->max_flush_latency_ns = timed_average_max(fl);
 500         dev_stats->avg_flush_latency_ns = timed_average_avg(fl);
 501
 502         dev_stats->avg_rd_queue_depth =
 503             block_acct_queue_depth(ts, BLOCK_ACCT_READ);
 504         dev_stats->avg_wr_queue_depth =
 505             block_acct_queue_depth(ts, BLOCK_ACCT_WRITE);
 506     }
 507
 508     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_READ],
 509                                  &ds->has_rd_latency_histogram,
 510                                  &ds->rd_latency_histogram);
 511     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_WRITE],
 512                                  &ds->has_wr_latency_histogram,
 513                                  &ds->wr_latency_histogram);
 514     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_FLUSH],
 515                                  &ds->has_flush_latency_histogram,
 516                                  &ds->flush_latency_histogram);
 517 }
 518
 519 static BlockStats *bdrv_query_bds_stats(BlockDriverState *bs,
 520                                         bool blk_level)
 521 {
 522     BlockStats *s = NULL;
 523
 524     s = g_malloc0(sizeof(*s));
 525     s->stats = g_malloc0(sizeof(*s->stats));
 526
 527     if (!bs) {
 528         return s;
 529     }
 530
 531     /* Skip automatically inserted nodes that the user isn't aware of in
 532      * a BlockBackend-level command. Stay at the exact node for a node-level
 533      * command. */
 534     while (blk_level && bs->drv && bs->implicit) {
 535         bs = backing_bs(bs);
 536         assert(bs);
 537     }
 538
 539     if (bdrv_get_node_name(bs)[0]) {
 540         s->has_node_name = true;
 541         s->node_name = g_strdup(bdrv_get_node_name(bs));
 542     }
 543
 544     s->stats->wr_highest_offset = stat64_get(&bs->wr_highest_offset);
 545
 546     s->driver_specific = bdrv_get_specific_stats(bs);
 547     if (s->driver_specific) {
 548         s->has_driver_specific = true;
 549     }
 550
 551     if (bs->file) {
 552         s->has_parent = true;
 553         s->parent = bdrv_query_bds_stats(bs->file->bs, blk_level);
 554     }
 555
 556     if (blk_level && bs->backing) {
 557         s->has_backing = true;
 558         s->backing = bdrv_query_bds_stats(bs->backing->bs, blk_level);
 559     }
 560
 561     return s;
 562 }
 563
 564 BlockInfoList *qmp_query_block(Error **errp)
 565 {
 566     BlockInfoList *head = NULL, **p_next = &head;
 567     BlockBackend *blk;
 568     Error *local_err = NULL;
 569
 570     for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
 571         BlockInfoList *info;
 572
 573         if (!*blk_name(blk) && !blk_get_attached_dev(blk)) {
 574             continue;
 575         }
 576
 577         info = g_malloc0(sizeof(*info));
 578         bdrv_query_info(blk, &info->value, &local_err);
 579         if (local_err) {
 580             error_propagate(errp, local_err);
 581             g_free(info);
 582             qapi_free_BlockInfoList(head);
 583             return NULL;
 584         }
 585
 586         *p_next = info;
 587         p_next = &info->next;
 588     }
 589
 590     return head;
 591 }
 592
 593 BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
 594                                      bool query_nodes,
 595                                      Error **errp)
 596 {
 597     BlockStatsList *head = NULL, **p_next = &head;
 598     BlockBackend *blk;
 599     BlockDriverState *bs;
 600
 601     /* Just to be safe if query_nodes is not always initialized */
 602     if (has_query_nodes && query_nodes) {
 603         for (bs = bdrv_next_node(NULL); bs; bs = bdrv_next_node(bs)) {
 604             BlockStatsList *info = g_malloc0(sizeof(*info));
 605             AioContext *ctx = bdrv_get_aio_context(bs);
 606
 607             aio_context_acquire(ctx);
 608             info->value = bdrv_query_bds_stats(bs, false);
 609             aio_context_release(ctx);
 610
 611             *p_next = info;
 612             p_next = &info->next;
 613         }
 614     } else {
 615         for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
 616             BlockStatsList *info;
 617             AioContext *ctx = blk_get_aio_context(blk);
 618             BlockStats *s;
 619             char *qdev;
 620
 621             if (!*blk_name(blk) && !blk_get_attached_dev(blk)) {
 622                 continue;
 623             }
 624
 625             aio_context_acquire(ctx);
 626             s = bdrv_query_bds_stats(blk_bs(blk), true);
 627             s->has_device = true;
 628             s->device = g_strdup(blk_name(blk));
 629
 630             qdev = blk_get_attached_dev_id(blk);
 631             if (qdev && *qdev) {
 632                 s->has_qdev = true;
 633                 s->qdev = qdev;
 634             } else {
 635                 g_free(qdev);
 636             }
 637
 638             bdrv_query_blk_stats(s->stats, blk);
 639             aio_context_release(ctx);
 640
 641             info = g_malloc0(sizeof(*info));
 642             info->value = s;
 643             *p_next = info;
 644             p_next = &info->next;
 645         }
 646     }
 647
 648     return head;
 649 }
 650
 651 void bdrv_snapshot_dump(QEMUSnapshotInfo *sn)
 652 {
 653     char date_buf[128], clock_buf[128];
 654     struct tm tm;
 655     time_t ti;
 656     int64_t secs;
 657     char *sizing = NULL;
 658
 659     if (!sn) {
 660         qemu_printf("%-10s%-20s%7s%20s%15s",
 661                     "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK");
 662     } else {
 663         ti = sn->date_sec;
 664         localtime_r(&ti, &tm);
 665         strftime(date_buf, sizeof(date_buf),
 666                  "%Y-%m-%d %H:%M:%S", &tm);
 667         secs = sn->vm_clock_nsec / 1000000000;
 668         snprintf(clock_buf, sizeof(clock_buf),
 669                  "%02d:%02d:%02d.%03d",
 670                  (int)(secs / 3600),
 671                  (int)((secs / 60) % 60),
 672                  (int)(secs % 60),
 673                  (int)((sn->vm_clock_nsec / 1000000) % 1000));
 674         sizing = size_to_str(sn->vm_state_size);
 675         qemu_printf("%-10s%-20s%7s%20s%15s",
 676                     sn->id_str, sn->name,
 677                     sizing,
 678                     date_buf,
 679                     clock_buf);
 680     }
 681     g_free(sizing);
 682 }
 683
 684 static void dump_qdict(int indentation, QDict *dict);
 685 static void dump_qlist(int indentation, QList *list);
 686
 687 static void dump_qobject(int comp_indent, QObject *obj)
 688 {
 689     switch (qobject_type(obj)) {
 690         case QTYPE_QNUM: {
 691             QNum *value = qobject_to(QNum, obj);
 692             char *tmp = qnum_to_string(value);
 693             qemu_printf("%s", tmp);
 694             g_free(tmp);
 695             break;
 696         }
 697         case QTYPE_QSTRING: {
 698             QString *value = qobject_to(QString, obj);
 699             qemu_printf("%s", qstring_get_str(value));
 700             break;
 701         }
 702         case QTYPE_QDICT: {
 703             QDict *value = qobject_to(QDict, obj);
 704             dump_qdict(comp_indent, value);
 705             break;
 706         }
 707         case QTYPE_QLIST: {
 708             QList *value = qobject_to(QList, obj);
 709             dump_qlist(comp_indent, value);
 710             break;
 711         }
 712         case QTYPE_QBOOL: {
 713             QBool *value = qobject_to(QBool, obj);
 714             qemu_printf("%s", qbool_get_bool(value) ? "true" : "false");
 715             break;
 716         }
 717         default:
 718             abort();
 719     }
 720 }
 721
 722 static void dump_qlist(int indentation, QList *list)
 723 {
 724     const QListEntry *entry;
 725     int i = 0;
 726
 727     for (entry = qlist_first(list); entry; entry = qlist_next(entry), i++) {
 728         QType type = qobject_type(entry->value);
 729         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 730         qemu_printf("%*s[%i]:%c", indentation * 4, "", i,
 731                     composite ? '\n' : ' ');
 732         dump_qobject(indentation + 1, entry->value);
 733         if (!composite) {
 734             qemu_printf("\n");
 735         }
 736     }
 737 }
 738
 739 static void dump_qdict(int indentation, QDict *dict)
 740 {
 741     const QDictEntry *entry;
 742
 743     for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) {
 744         QType type = qobject_type(entry->value);
 745         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 746         char *key = g_malloc(strlen(entry->key) + 1);
 747         int i;
 748
 749         /* replace dashes with spaces in key (variable) names */
 750         for (i = 0; entry->key[i]; i++) {
 751             key[i] = entry->key[i] == '-' ? ' ' : entry->key[i];
 752         }
 753         key[i] = 0;
 754         qemu_printf("%*s%s:%c", indentation * 4, "", key,
 755                     composite ? '\n' : ' ');
 756         dump_qobject(indentation + 1, entry->value);
 757         if (!composite) {
 758             qemu_printf("\n");
 759         }
 760         g_free(key);
 761     }
 762 }
 763
 764 void bdrv_image_info_specific_dump(ImageInfoSpecific *info_spec)
 765 {
 766     QObject *obj, *data;
 767     Visitor *v = qobject_output_visitor_new(&obj);
 768
 769     visit_type_ImageInfoSpecific(v, NULL, &info_spec, &error_abort);
 770     visit_complete(v, &obj);
 771     data = qdict_get(qobject_to(QDict, obj), "data");
 772     dump_qobject(1, data);
 773     qobject_unref(obj);
 774     visit_free(v);
 775 }
 776
 777 void bdrv_image_info_dump(ImageInfo *info)
 778 {
 779     char *size_buf, *dsize_buf;
 780     if (!info->has_actual_size) {
 781         dsize_buf = g_strdup("unavailable");
 782     } else {
 783         dsize_buf = size_to_str(info->actual_size);
 784     }
 785     size_buf = size_to_str(info->virtual_size);
 786     qemu_printf("image: %s\n"
 787                 "file format: %s\n"
 788                 "virtual size: %s (%" PRId64 " bytes)\n"
 789                 "disk size: %s\n",
 790                 info->filename, info->format, size_buf,
 791                 info->virtual_size,
 792                 dsize_buf);
 793     g_free(size_buf);
 794     g_free(dsize_buf);
 795
 796     if (info->has_encrypted && info->encrypted) {
 797         qemu_printf("encrypted: yes\n");
 798     }
 799
 800     if (info->has_cluster_size) {
 801         qemu_printf("cluster_size: %" PRId64 "\n",
 802                     info->cluster_size);
 803     }
 804
 805     if (info->has_dirty_flag && info->dirty_flag) {
 806         qemu_printf("cleanly shut down: no\n");
 807     }
 808
 809     if (info->has_backing_filename) {
 810         qemu_printf("backing file: %s", info->backing_filename);
 811         if (!info->has_full_backing_filename) {
 812             qemu_printf(" (cannot determine actual path)");
 813         } else if (strcmp(info->backing_filename,
 814                           info->full_backing_filename) != 0) {
 815             qemu_printf(" (actual path: %s)", info->full_backing_filename);
 816         }
 817         qemu_printf("\n");
 818         if (info->has_backing_filename_format) {
 819             qemu_printf("backing file format: %s\n",
 820                         info->backing_filename_format);
 821         }
 822     }
 823
 824     if (info->has_snapshots) {
 825         SnapshotInfoList *elem;
 826
 827         qemu_printf("Snapshot list:\n");
 828         bdrv_snapshot_dump(NULL);
 829         qemu_printf("\n");
 830
 831         /* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but
 832          * we convert to the block layer's native QEMUSnapshotInfo for now.
 833          */
 834         for (elem = info->snapshots; elem; elem = elem->next) {
 835             QEMUSnapshotInfo sn = {
 836                 .vm_state_size = elem->value->vm_state_size,
 837                 .date_sec = elem->value->date_sec,
 838                 .date_nsec = elem->value->date_nsec,
 839                 .vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +
 840                                  elem->value->vm_clock_nsec,
 841             };
 842
 843             pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);
 844             pstrcpy(sn.name, sizeof(sn.name), elem->value->name);
 845             bdrv_snapshot_dump(&sn);
 846             qemu_printf("\n");
 847         }
 848     }
 849
 850     if (info->has_format_specific) {
 851         qemu_printf("Format specific information:\n");
 852         bdrv_image_info_specific_dump(info->format_specific);
 853     }
 854 }