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,
  46                                         bool flat,
  47                                         Error **errp)
  48 {
  49     ImageInfo **p_image_info;
  50     BlockDriverState *bs0;
  51     BlockDeviceInfo *info;
  52
  53     if (!bs->drv) {
  54         error_setg(errp, "Block device %s is ejected", bs->node_name);
  55         return NULL;
  56     }
  57
  58     bdrv_refresh_filename(bs);
  59
  60     info = g_malloc0(sizeof(*info));
  61     info->file                   = g_strdup(bs->filename);
  62     info->ro                     = bs->read_only;
  63     info->drv                    = g_strdup(bs->drv->format_name);
  64     info->encrypted              = bs->encrypted;
  65     info->encryption_key_missing = false;
  66
  67     info->cache = g_new(BlockdevCacheInfo, 1);
  68     *info->cache = (BlockdevCacheInfo) {
  69         .writeback      = blk ? blk_enable_write_cache(blk) : true,
  70         .direct         = !!(bs->open_flags & BDRV_O_NOCACHE),
  71         .no_flush       = !!(bs->open_flags & BDRV_O_NO_FLUSH),
  72     };
  73
  74     if (bs->node_name[0]) {
  75         info->has_node_name = true;
  76         info->node_name = g_strdup(bs->node_name);
  77     }
  78
  79     if (bs->backing_file[0]) {
  80         info->has_backing_file = true;
  81         info->backing_file = g_strdup(bs->backing_file);
  82     }
  83
  84     if (!QLIST_EMPTY(&bs->dirty_bitmaps)) {
  85         info->has_dirty_bitmaps = true;
  86         info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
  87     }
  88
  89     info->detect_zeroes = bs->detect_zeroes;
  90
  91     if (blk && blk_get_public(blk)->throttle_group_member.throttle_state) {
  92         ThrottleConfig cfg;
  93         BlockBackendPublic *blkp = blk_get_public(blk);
  94
  95         throttle_group_get_config(&blkp->throttle_group_member, &cfg);
  96
  97         info->bps     = cfg.buckets[THROTTLE_BPS_TOTAL].avg;
  98         info->bps_rd  = cfg.buckets[THROTTLE_BPS_READ].avg;
  99         info->bps_wr  = cfg.buckets[THROTTLE_BPS_WRITE].avg;
 100
 101         info->iops    = cfg.buckets[THROTTLE_OPS_TOTAL].avg;
 102         info->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg;
 103         info->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg;
 104
 105         info->has_bps_max     = cfg.buckets[THROTTLE_BPS_TOTAL].max;
 106         info->bps_max         = cfg.buckets[THROTTLE_BPS_TOTAL].max;
 107         info->has_bps_rd_max  = cfg.buckets[THROTTLE_BPS_READ].max;
 108         info->bps_rd_max      = cfg.buckets[THROTTLE_BPS_READ].max;
 109         info->has_bps_wr_max  = cfg.buckets[THROTTLE_BPS_WRITE].max;
 110         info->bps_wr_max      = cfg.buckets[THROTTLE_BPS_WRITE].max;
 111
 112         info->has_iops_max    = cfg.buckets[THROTTLE_OPS_TOTAL].max;
 113         info->iops_max        = cfg.buckets[THROTTLE_OPS_TOTAL].max;
 114         info->has_iops_rd_max = cfg.buckets[THROTTLE_OPS_READ].max;
 115         info->iops_rd_max     = cfg.buckets[THROTTLE_OPS_READ].max;
 116         info->has_iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max;
 117         info->iops_wr_max     = cfg.buckets[THROTTLE_OPS_WRITE].max;
 118
 119         info->has_bps_max_length     = info->has_bps_max;
 120         info->bps_max_length         =
 121             cfg.buckets[THROTTLE_BPS_TOTAL].burst_length;
 122         info->has_bps_rd_max_length  = info->has_bps_rd_max;
 123         info->bps_rd_max_length      =
 124             cfg.buckets[THROTTLE_BPS_READ].burst_length;
 125         info->has_bps_wr_max_length  = info->has_bps_wr_max;
 126         info->bps_wr_max_length      =
 127             cfg.buckets[THROTTLE_BPS_WRITE].burst_length;
 128
 129         info->has_iops_max_length    = info->has_iops_max;
 130         info->iops_max_length        =
 131             cfg.buckets[THROTTLE_OPS_TOTAL].burst_length;
 132         info->has_iops_rd_max_length = info->has_iops_rd_max;
 133         info->iops_rd_max_length     =
 134             cfg.buckets[THROTTLE_OPS_READ].burst_length;
 135         info->has_iops_wr_max_length = info->has_iops_wr_max;
 136         info->iops_wr_max_length     =
 137             cfg.buckets[THROTTLE_OPS_WRITE].burst_length;
 138
 139         info->has_iops_size = cfg.op_size;
 140         info->iops_size = cfg.op_size;
 141
 142         info->has_group = true;
 143         info->group =
 144             g_strdup(throttle_group_get_name(&blkp->throttle_group_member));
 145     }
 146
 147     info->write_threshold = bdrv_write_threshold_get(bs);
 148
 149     bs0 = bs;
 150     p_image_info = &info->image;
 151     info->backing_file_depth = 0;
 152     while (1) {
 153         Error *local_err = NULL;
 154         bdrv_query_image_info(bs0, p_image_info, &local_err);
 155         if (local_err) {
 156             error_propagate(errp, local_err);
 157             qapi_free_BlockDeviceInfo(info);
 158             return NULL;
 159         }
 160
 161         /* stop gathering data for flat output */
 162         if (flat) {
 163             break;
 164         }
 165
 166         if (bs0->drv && bs0->backing) {
 167             info->backing_file_depth++;
 168             bs0 = bs0->backing->bs;
 169             (*p_image_info)->has_backing_image = true;
 170             p_image_info = &((*p_image_info)->backing_image);
 171         } else {
 172             break;
 173         }
 174
 175         /* Skip automatically inserted nodes that the user isn't aware of for
 176          * query-block (blk != NULL), but not for query-named-block-nodes */
 177         while (blk && bs0->drv && bs0->implicit) {
 178             bs0 = backing_bs(bs0);
 179             assert(bs0);
 180         }
 181     }
 182
 183     return info;
 184 }
 185
 186 /*
 187  * Returns 0 on success, with *p_list either set to describe snapshot
 188  * information, or NULL because there are no snapshots.  Returns -errno on
 189  * error, with *p_list untouched.
 190  */
 191 int bdrv_query_snapshot_info_list(BlockDriverState *bs,
 192                                   SnapshotInfoList **p_list,
 193                                   Error **errp)
 194 {
 195     int i, sn_count;
 196     QEMUSnapshotInfo *sn_tab = NULL;
 197     SnapshotInfoList *info_list, *cur_item = NULL, *head = NULL;
 198     SnapshotInfo *info;
 199
 200     sn_count = bdrv_snapshot_list(bs, &sn_tab);
 201     if (sn_count < 0) {
 202         const char *dev = bdrv_get_device_name(bs);
 203         switch (sn_count) {
 204         case -ENOMEDIUM:
 205             error_setg(errp, "Device '%s' is not inserted", dev);
 206             break;
 207         case -ENOTSUP:
 208             error_setg(errp,
 209                        "Device '%s' does not support internal snapshots",
 210                        dev);
 211             break;
 212         default:
 213             error_setg_errno(errp, -sn_count,
 214                              "Can't list snapshots of device '%s'", dev);
 215             break;
 216         }
 217         return sn_count;
 218     }
 219
 220     for (i = 0; i < sn_count; i++) {
 221         info = g_new0(SnapshotInfo, 1);
 222         info->id            = g_strdup(sn_tab[i].id_str);
 223         info->name          = g_strdup(sn_tab[i].name);
 224         info->vm_state_size = sn_tab[i].vm_state_size;
 225         info->date_sec      = sn_tab[i].date_sec;
 226         info->date_nsec     = sn_tab[i].date_nsec;
 227         info->vm_clock_sec  = sn_tab[i].vm_clock_nsec / 1000000000;
 228         info->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
 229
 230         info_list = g_new0(SnapshotInfoList, 1);
 231         info_list->value = info;
 232
 233         /* XXX: waiting for the qapi to support qemu-queue.h types */
 234         if (!cur_item) {
 235             head = cur_item = info_list;
 236         } else {
 237             cur_item->next = info_list;
 238             cur_item = info_list;
 239         }
 240
 241     }
 242
 243     g_free(sn_tab);
 244     *p_list = head;
 245     return 0;
 246 }
 247
 248 /**
 249  * bdrv_query_image_info:
 250  * @bs: block device to examine
 251  * @p_info: location to store image information
 252  * @errp: location to store error information
 253  *
 254  * Store "flat" image information in @p_info.
 255  *
 256  * "Flat" means it does *not* query backing image information,
 257  * i.e. (*pinfo)->has_backing_image will be set to false and
 258  * (*pinfo)->backing_image to NULL even when the image does in fact have
 259  * a backing image.
 260  *
 261  * @p_info will be set only on success. On error, store error in @errp.
 262  */
 263 void bdrv_query_image_info(BlockDriverState *bs,
 264                            ImageInfo **p_info,
 265                            Error **errp)
 266 {
 267     int64_t size;
 268     const char *backing_filename;
 269     BlockDriverInfo bdi;
 270     int ret;
 271     Error *err = NULL;
 272     ImageInfo *info;
 273
 274     aio_context_acquire(bdrv_get_aio_context(bs));
 275
 276     size = bdrv_getlength(bs);
 277     if (size < 0) {
 278         error_setg_errno(errp, -size, "Can't get image size '%s'",
 279                          bs->exact_filename);
 280         goto out;
 281     }
 282
 283     bdrv_refresh_filename(bs);
 284
 285     info = g_new0(ImageInfo, 1);
 286     info->filename        = g_strdup(bs->filename);
 287     info->format          = g_strdup(bdrv_get_format_name(bs));
 288     info->virtual_size    = size;
 289     info->actual_size     = bdrv_get_allocated_file_size(bs);
 290     info->has_actual_size = info->actual_size >= 0;
 291     if (bdrv_is_encrypted(bs)) {
 292         info->encrypted = true;
 293         info->has_encrypted = true;
 294     }
 295     if (bdrv_get_info(bs, &bdi) >= 0) {
 296         if (bdi.cluster_size != 0) {
 297             info->cluster_size = bdi.cluster_size;
 298             info->has_cluster_size = true;
 299         }
 300         info->dirty_flag = bdi.is_dirty;
 301         info->has_dirty_flag = true;
 302     }
 303     info->format_specific = bdrv_get_specific_info(bs, &err);
 304     if (err) {
 305         error_propagate(errp, err);
 306         qapi_free_ImageInfo(info);
 307         goto out;
 308     }
 309     info->has_format_specific = info->format_specific != NULL;
 310
 311     backing_filename = bs->backing_file;
 312     if (backing_filename[0] != '\0') {
 313         char *backing_filename2;
 314         info->backing_filename = g_strdup(backing_filename);
 315         info->has_backing_filename = true;
 316         backing_filename2 = bdrv_get_full_backing_filename(bs, NULL);
 317
 318         /* Always report the full_backing_filename if present, even if it's the
 319          * same as backing_filename. That they are same is useful info. */
 320         if (backing_filename2) {
 321             info->full_backing_filename = g_strdup(backing_filename2);
 322             info->has_full_backing_filename = true;
 323         }
 324
 325         if (bs->backing_format[0]) {
 326             info->backing_filename_format = g_strdup(bs->backing_format);
 327             info->has_backing_filename_format = true;
 328         }
 329         g_free(backing_filename2);
 330     }
 331
 332     ret = bdrv_query_snapshot_info_list(bs, &info->snapshots, &err);
 333     switch (ret) {
 334     case 0:
 335         if (info->snapshots) {
 336             info->has_snapshots = true;
 337         }
 338         break;
 339     /* recoverable error */
 340     case -ENOMEDIUM:
 341     case -ENOTSUP:
 342         error_free(err);
 343         break;
 344     default:
 345         error_propagate(errp, err);
 346         qapi_free_ImageInfo(info);
 347         goto out;
 348     }
 349
 350     *p_info = info;
 351
 352 out:
 353     aio_context_release(bdrv_get_aio_context(bs));
 354 }
 355
 356 /* @p_info will be set only on success. */
 357 static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
 358                             Error **errp)
 359 {
 360     BlockInfo *info = g_malloc0(sizeof(*info));
 361     BlockDriverState *bs = blk_bs(blk);
 362     char *qdev;
 363
 364     /* Skip automatically inserted nodes that the user isn't aware of */
 365     while (bs && bs->drv && bs->implicit) {
 366         bs = backing_bs(bs);
 367     }
 368
 369     info->device = g_strdup(blk_name(blk));
 370     info->type = g_strdup("unknown");
 371     info->locked = blk_dev_is_medium_locked(blk);
 372     info->removable = blk_dev_has_removable_media(blk);
 373
 374     qdev = blk_get_attached_dev_id(blk);
 375     if (qdev && *qdev) {
 376         info->has_qdev = true;
 377         info->qdev = qdev;
 378     } else {
 379         g_free(qdev);
 380     }
 381
 382     if (blk_dev_has_tray(blk)) {
 383         info->has_tray_open = true;
 384         info->tray_open = blk_dev_is_tray_open(blk);
 385     }
 386
 387     if (blk_iostatus_is_enabled(blk)) {
 388         info->has_io_status = true;
 389         info->io_status = blk_iostatus(blk);
 390     }
 391
 392     if (bs && !QLIST_EMPTY(&bs->dirty_bitmaps)) {
 393         info->has_dirty_bitmaps = true;
 394         info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
 395     }
 396
 397     if (bs && bs->drv) {
 398         info->has_inserted = true;
 399         info->inserted = bdrv_block_device_info(blk, bs, false, errp);
 400         if (info->inserted == NULL) {
 401             goto err;
 402         }
 403     }
 404
 405     *p_info = info;
 406     return;
 407
 408  err:
 409     qapi_free_BlockInfo(info);
 410 }
 411
 412 static uint64List *uint64_list(uint64_t *list, int size)
 413 {
 414     int i;
 415     uint64List *out_list = NULL;
 416     uint64List **pout_list = &out_list;
 417
 418     for (i = 0; i < size; i++) {
 419         uint64List *entry = g_new(uint64List, 1);
 420         entry->value = list[i];
 421         *pout_list = entry;
 422         pout_list = &entry->next;
 423     }
 424
 425     *pout_list = NULL;
 426
 427     return out_list;
 428 }
 429
 430 static void bdrv_latency_histogram_stats(BlockLatencyHistogram *hist,
 431                                          bool *not_null,
 432                                          BlockLatencyHistogramInfo **info)
 433 {
 434     *not_null = hist->bins != NULL;
 435     if (*not_null) {
 436         *info = g_new0(BlockLatencyHistogramInfo, 1);
 437
 438         (*info)->boundaries = uint64_list(hist->boundaries, hist->nbins - 1);
 439         (*info)->bins = uint64_list(hist->bins, hist->nbins);
 440     }
 441 }
 442
 443 static void bdrv_query_blk_stats(BlockDeviceStats *ds, BlockBackend *blk)
 444 {
 445     BlockAcctStats *stats = blk_get_stats(blk);
 446     BlockAcctTimedStats *ts = NULL;
 447
 448     ds->rd_bytes = stats->nr_bytes[BLOCK_ACCT_READ];
 449     ds->wr_bytes = stats->nr_bytes[BLOCK_ACCT_WRITE];
 450     ds->unmap_bytes = stats->nr_bytes[BLOCK_ACCT_UNMAP];
 451     ds->rd_operations = stats->nr_ops[BLOCK_ACCT_READ];
 452     ds->wr_operations = stats->nr_ops[BLOCK_ACCT_WRITE];
 453     ds->unmap_operations = stats->nr_ops[BLOCK_ACCT_UNMAP];
 454
 455     ds->failed_rd_operations = stats->failed_ops[BLOCK_ACCT_READ];
 456     ds->failed_wr_operations = stats->failed_ops[BLOCK_ACCT_WRITE];
 457     ds->failed_flush_operations = stats->failed_ops[BLOCK_ACCT_FLUSH];
 458     ds->failed_unmap_operations = stats->failed_ops[BLOCK_ACCT_UNMAP];
 459
 460     ds->invalid_rd_operations = stats->invalid_ops[BLOCK_ACCT_READ];
 461     ds->invalid_wr_operations = stats->invalid_ops[BLOCK_ACCT_WRITE];
 462     ds->invalid_flush_operations =
 463         stats->invalid_ops[BLOCK_ACCT_FLUSH];
 464     ds->invalid_unmap_operations = stats->invalid_ops[BLOCK_ACCT_UNMAP];
 465
 466     ds->rd_merged = stats->merged[BLOCK_ACCT_READ];
 467     ds->wr_merged = stats->merged[BLOCK_ACCT_WRITE];
 468     ds->unmap_merged = stats->merged[BLOCK_ACCT_UNMAP];
 469     ds->flush_operations = stats->nr_ops[BLOCK_ACCT_FLUSH];
 470     ds->wr_total_time_ns = stats->total_time_ns[BLOCK_ACCT_WRITE];
 471     ds->rd_total_time_ns = stats->total_time_ns[BLOCK_ACCT_READ];
 472     ds->flush_total_time_ns = stats->total_time_ns[BLOCK_ACCT_FLUSH];
 473     ds->unmap_total_time_ns = stats->total_time_ns[BLOCK_ACCT_UNMAP];
 474
 475     ds->has_idle_time_ns = stats->last_access_time_ns > 0;
 476     if (ds->has_idle_time_ns) {
 477         ds->idle_time_ns = block_acct_idle_time_ns(stats);
 478     }
 479
 480     ds->account_invalid = stats->account_invalid;
 481     ds->account_failed = stats->account_failed;
 482
 483     while ((ts = block_acct_interval_next(stats, ts))) {
 484         BlockDeviceTimedStatsList *timed_stats =
 485             g_malloc0(sizeof(*timed_stats));
 486         BlockDeviceTimedStats *dev_stats = g_malloc0(sizeof(*dev_stats));
 487         timed_stats->next = ds->timed_stats;
 488         timed_stats->value = dev_stats;
 489         ds->timed_stats = timed_stats;
 490
 491         TimedAverage *rd = &ts->latency[BLOCK_ACCT_READ];
 492         TimedAverage *wr = &ts->latency[BLOCK_ACCT_WRITE];
 493         TimedAverage *fl = &ts->latency[BLOCK_ACCT_FLUSH];
 494
 495         dev_stats->interval_length = ts->interval_length;
 496
 497         dev_stats->min_rd_latency_ns = timed_average_min(rd);
 498         dev_stats->max_rd_latency_ns = timed_average_max(rd);
 499         dev_stats->avg_rd_latency_ns = timed_average_avg(rd);
 500
 501         dev_stats->min_wr_latency_ns = timed_average_min(wr);
 502         dev_stats->max_wr_latency_ns = timed_average_max(wr);
 503         dev_stats->avg_wr_latency_ns = timed_average_avg(wr);
 504
 505         dev_stats->min_flush_latency_ns = timed_average_min(fl);
 506         dev_stats->max_flush_latency_ns = timed_average_max(fl);
 507         dev_stats->avg_flush_latency_ns = timed_average_avg(fl);
 508
 509         dev_stats->avg_rd_queue_depth =
 510             block_acct_queue_depth(ts, BLOCK_ACCT_READ);
 511         dev_stats->avg_wr_queue_depth =
 512             block_acct_queue_depth(ts, BLOCK_ACCT_WRITE);
 513     }
 514
 515     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_READ],
 516                                  &ds->has_rd_latency_histogram,
 517                                  &ds->rd_latency_histogram);
 518     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_WRITE],
 519                                  &ds->has_wr_latency_histogram,
 520                                  &ds->wr_latency_histogram);
 521     bdrv_latency_histogram_stats(&stats->latency_histogram[BLOCK_ACCT_FLUSH],
 522                                  &ds->has_flush_latency_histogram,
 523                                  &ds->flush_latency_histogram);
 524 }
 525
 526 static BlockStats *bdrv_query_bds_stats(BlockDriverState *bs,
 527                                         bool blk_level)
 528 {
 529     BlockStats *s = NULL;
 530
 531     s = g_malloc0(sizeof(*s));
 532     s->stats = g_malloc0(sizeof(*s->stats));
 533
 534     if (!bs) {
 535         return s;
 536     }
 537
 538     /* Skip automatically inserted nodes that the user isn't aware of in
 539      * a BlockBackend-level command. Stay at the exact node for a node-level
 540      * command. */
 541     while (blk_level && bs->drv && bs->implicit) {
 542         bs = backing_bs(bs);
 543         assert(bs);
 544     }
 545
 546     if (bdrv_get_node_name(bs)[0]) {
 547         s->has_node_name = true;
 548         s->node_name = g_strdup(bdrv_get_node_name(bs));
 549     }
 550
 551     s->stats->wr_highest_offset = stat64_get(&bs->wr_highest_offset);
 552
 553     s->driver_specific = bdrv_get_specific_stats(bs);
 554     if (s->driver_specific) {
 555         s->has_driver_specific = true;
 556     }
 557
 558     if (bs->file) {
 559         s->has_parent = true;
 560         s->parent = bdrv_query_bds_stats(bs->file->bs, blk_level);
 561     }
 562
 563     if (blk_level && bs->backing) {
 564         s->has_backing = true;
 565         s->backing = bdrv_query_bds_stats(bs->backing->bs, blk_level);
 566     }
 567
 568     return s;
 569 }
 570
 571 BlockInfoList *qmp_query_block(Error **errp)
 572 {
 573     BlockInfoList *head = NULL, **p_next = &head;
 574     BlockBackend *blk;
 575     Error *local_err = NULL;
 576
 577     for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
 578         BlockInfoList *info;
 579
 580         if (!*blk_name(blk) && !blk_get_attached_dev(blk)) {
 581             continue;
 582         }
 583
 584         info = g_malloc0(sizeof(*info));
 585         bdrv_query_info(blk, &info->value, &local_err);
 586         if (local_err) {
 587             error_propagate(errp, local_err);
 588             g_free(info);
 589             qapi_free_BlockInfoList(head);
 590             return NULL;
 591         }
 592
 593         *p_next = info;
 594         p_next = &info->next;
 595     }
 596
 597     return head;
 598 }
 599
 600 BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
 601                                      bool query_nodes,
 602                                      Error **errp)
 603 {
 604     BlockStatsList *head = NULL, **p_next = &head;
 605     BlockBackend *blk;
 606     BlockDriverState *bs;
 607
 608     /* Just to be safe if query_nodes is not always initialized */
 609     if (has_query_nodes && query_nodes) {
 610         for (bs = bdrv_next_node(NULL); bs; bs = bdrv_next_node(bs)) {
 611             BlockStatsList *info = g_malloc0(sizeof(*info));
 612             AioContext *ctx = bdrv_get_aio_context(bs);
 613
 614             aio_context_acquire(ctx);
 615             info->value = bdrv_query_bds_stats(bs, false);
 616             aio_context_release(ctx);
 617
 618             *p_next = info;
 619             p_next = &info->next;
 620         }
 621     } else {
 622         for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
 623             BlockStatsList *info;
 624             AioContext *ctx = blk_get_aio_context(blk);
 625             BlockStats *s;
 626             char *qdev;
 627
 628             if (!*blk_name(blk) && !blk_get_attached_dev(blk)) {
 629                 continue;
 630             }
 631
 632             aio_context_acquire(ctx);
 633             s = bdrv_query_bds_stats(blk_bs(blk), true);
 634             s->has_device = true;
 635             s->device = g_strdup(blk_name(blk));
 636
 637             qdev = blk_get_attached_dev_id(blk);
 638             if (qdev && *qdev) {
 639                 s->has_qdev = true;
 640                 s->qdev = qdev;
 641             } else {
 642                 g_free(qdev);
 643             }
 644
 645             bdrv_query_blk_stats(s->stats, blk);
 646             aio_context_release(ctx);
 647
 648             info = g_malloc0(sizeof(*info));
 649             info->value = s;
 650             *p_next = info;
 651             p_next = &info->next;
 652         }
 653     }
 654
 655     return head;
 656 }
 657
 658 void bdrv_snapshot_dump(QEMUSnapshotInfo *sn)
 659 {
 660     char date_buf[128], clock_buf[128];
 661     struct tm tm;
 662     time_t ti;
 663     int64_t secs;
 664     char *sizing = NULL;
 665
 666     if (!sn) {
 667         qemu_printf("%-10s%-20s%11s%20s%15s",
 668                     "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK");
 669     } else {
 670         ti = sn->date_sec;
 671         localtime_r(&ti, &tm);
 672         strftime(date_buf, sizeof(date_buf),
 673                  "%Y-%m-%d %H:%M:%S", &tm);
 674         secs = sn->vm_clock_nsec / 1000000000;
 675         snprintf(clock_buf, sizeof(clock_buf),
 676                  "%02d:%02d:%02d.%03d",
 677                  (int)(secs / 3600),
 678                  (int)((secs / 60) % 60),
 679                  (int)(secs % 60),
 680                  (int)((sn->vm_clock_nsec / 1000000) % 1000));
 681         sizing = size_to_str(sn->vm_state_size);
 682         qemu_printf("%-10s%-20s%11s%20s%15s",
 683                     sn->id_str, sn->name,
 684                     sizing,
 685                     date_buf,
 686                     clock_buf);
 687     }
 688     g_free(sizing);
 689 }
 690
 691 static void dump_qdict(int indentation, QDict *dict);
 692 static void dump_qlist(int indentation, QList *list);
 693
 694 static void dump_qobject(int comp_indent, QObject *obj)
 695 {
 696     switch (qobject_type(obj)) {
 697         case QTYPE_QNUM: {
 698             QNum *value = qobject_to(QNum, obj);
 699             char *tmp = qnum_to_string(value);
 700             qemu_printf("%s", tmp);
 701             g_free(tmp);
 702             break;
 703         }
 704         case QTYPE_QSTRING: {
 705             QString *value = qobject_to(QString, obj);
 706             qemu_printf("%s", qstring_get_str(value));
 707             break;
 708         }
 709         case QTYPE_QDICT: {
 710             QDict *value = qobject_to(QDict, obj);
 711             dump_qdict(comp_indent, value);
 712             break;
 713         }
 714         case QTYPE_QLIST: {
 715             QList *value = qobject_to(QList, obj);
 716             dump_qlist(comp_indent, value);
 717             break;
 718         }
 719         case QTYPE_QBOOL: {
 720             QBool *value = qobject_to(QBool, obj);
 721             qemu_printf("%s", qbool_get_bool(value) ? "true" : "false");
 722             break;
 723         }
 724         default:
 725             abort();
 726     }
 727 }
 728
 729 static void dump_qlist(int indentation, QList *list)
 730 {
 731     const QListEntry *entry;
 732     int i = 0;
 733
 734     for (entry = qlist_first(list); entry; entry = qlist_next(entry), i++) {
 735         QType type = qobject_type(entry->value);
 736         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 737         qemu_printf("%*s[%i]:%c", indentation * 4, "", i,
 738                     composite ? '\n' : ' ');
 739         dump_qobject(indentation + 1, entry->value);
 740         if (!composite) {
 741             qemu_printf("\n");
 742         }
 743     }
 744 }
 745
 746 static void dump_qdict(int indentation, QDict *dict)
 747 {
 748     const QDictEntry *entry;
 749
 750     for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) {
 751         QType type = qobject_type(entry->value);
 752         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
 753         char *key = g_malloc(strlen(entry->key) + 1);
 754         int i;
 755
 756         /* replace dashes with spaces in key (variable) names */
 757         for (i = 0; entry->key[i]; i++) {
 758             key[i] = entry->key[i] == '-' ? ' ' : entry->key[i];
 759         }
 760         key[i] = 0;
 761         qemu_printf("%*s%s:%c", indentation * 4, "", key,
 762                     composite ? '\n' : ' ');
 763         dump_qobject(indentation + 1, entry->value);
 764         if (!composite) {
 765             qemu_printf("\n");
 766         }
 767         g_free(key);
 768     }
 769 }
 770
 771 void bdrv_image_info_specific_dump(ImageInfoSpecific *info_spec)
 772 {
 773     QObject *obj, *data;
 774     Visitor *v = qobject_output_visitor_new(&obj);
 775
 776     visit_type_ImageInfoSpecific(v, NULL, &info_spec, &error_abort);
 777     visit_complete(v, &obj);
 778     data = qdict_get(qobject_to(QDict, obj), "data");
 779     dump_qobject(1, data);
 780     qobject_unref(obj);
 781     visit_free(v);
 782 }
 783
 784 void bdrv_image_info_dump(ImageInfo *info)
 785 {
 786     char *size_buf, *dsize_buf;
 787     if (!info->has_actual_size) {
 788         dsize_buf = g_strdup("unavailable");
 789     } else {
 790         dsize_buf = size_to_str(info->actual_size);
 791     }
 792     size_buf = size_to_str(info->virtual_size);
 793     qemu_printf("image: %s\n"
 794                 "file format: %s\n"
 795                 "virtual size: %s (%" PRId64 " bytes)\n"
 796                 "disk size: %s\n",
 797                 info->filename, info->format, size_buf,
 798                 info->virtual_size,
 799                 dsize_buf);
 800     g_free(size_buf);
 801     g_free(dsize_buf);
 802
 803     if (info->has_encrypted && info->encrypted) {
 804         qemu_printf("encrypted: yes\n");
 805     }
 806
 807     if (info->has_cluster_size) {
 808         qemu_printf("cluster_size: %" PRId64 "\n",
 809                     info->cluster_size);
 810     }
 811
 812     if (info->has_dirty_flag && info->dirty_flag) {
 813         qemu_printf("cleanly shut down: no\n");
 814     }
 815
 816     if (info->has_backing_filename) {
 817         qemu_printf("backing file: %s", info->backing_filename);
 818         if (!info->has_full_backing_filename) {
 819             qemu_printf(" (cannot determine actual path)");
 820         } else if (strcmp(info->backing_filename,
 821                           info->full_backing_filename) != 0) {
 822             qemu_printf(" (actual path: %s)", info->full_backing_filename);
 823         }
 824         qemu_printf("\n");
 825         if (info->has_backing_filename_format) {
 826             qemu_printf("backing file format: %s\n",
 827                         info->backing_filename_format);
 828         }
 829     }
 830
 831     if (info->has_snapshots) {
 832         SnapshotInfoList *elem;
 833
 834         qemu_printf("Snapshot list:\n");
 835         bdrv_snapshot_dump(NULL);
 836         qemu_printf("\n");
 837
 838         /* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but
 839          * we convert to the block layer's native QEMUSnapshotInfo for now.
 840          */
 841         for (elem = info->snapshots; elem; elem = elem->next) {
 842             QEMUSnapshotInfo sn = {
 843                 .vm_state_size = elem->value->vm_state_size,
 844                 .date_sec = elem->value->date_sec,
 845                 .date_nsec = elem->value->date_nsec,
 846                 .vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +
 847                                  elem->value->vm_clock_nsec,
 848             };
 849
 850             pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);
 851             pstrcpy(sn.name, sizeof(sn.name), elem->value->name);
 852             bdrv_snapshot_dump(&sn);
 853             qemu_printf("\n");
 854         }
 855     }
 856
 857     if (info->has_format_specific) {
 858         qemu_printf("Format specific information:\n");
 859         bdrv_image_info_specific_dump(info->format_specific);
 860     }
 861 }