xref: /openbmc/qemu/block/qapi.c (revision 3ab8bf83)
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/dirty-bitmap.h"
30 #include "block/throttle-groups.h"
31 #include "block/write-threshold.h"
32 #include "qapi/error.h"
33 #include "qapi/qapi-commands-block-core.h"
34 #include "qapi/qobject-output-visitor.h"
35 #include "qapi/qapi-visit-block-core.h"
36 #include "qapi/qmp/qbool.h"
37 #include "qapi/qmp/qdict.h"
38 #include "qapi/qmp/qlist.h"
39 #include "qapi/qmp/qnum.h"
40 #include "qapi/qmp/qstring.h"
41 #include "qemu/qemu-print.h"
42 #include "sysemu/block-backend.h"
43 #include "qemu/cutils.h"
44 
45 BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
46                                         BlockDriverState *bs,
47                                         bool flat,
48                                         Error **errp)
49 {
50     ImageInfo **p_image_info;
51     BlockDriverState *bs0, *backing;
52     BlockDeviceInfo *info;
53 
54     if (!bs->drv) {
55         error_setg(errp, "Block device %s is ejected", bs->node_name);
56         return NULL;
57     }
58 
59     bdrv_refresh_filename(bs);
60 
61     info = g_malloc0(sizeof(*info));
62     info->file                   = g_strdup(bs->filename);
63     info->ro                     = bdrv_is_read_only(bs);
64     info->drv                    = g_strdup(bs->drv->format_name);
65     info->encrypted              = bs->encrypted;
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->node_name = g_strdup(bs->node_name);
76     }
77 
78     backing = bdrv_cow_bs(bs);
79     if (backing) {
80         info->backing_file = g_strdup(backing->filename);
81     }
82 
83     if (!QLIST_EMPTY(&bs->dirty_bitmaps)) {
84         info->has_dirty_bitmaps = true;
85         info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
86     }
87 
88     info->detect_zeroes = bs->detect_zeroes;
89 
90     if (blk && blk_get_public(blk)->throttle_group_member.throttle_state) {
91         ThrottleConfig cfg;
92         BlockBackendPublic *blkp = blk_get_public(blk);
93 
94         throttle_group_get_config(&blkp->throttle_group_member, &cfg);
95 
96         info->bps     = cfg.buckets[THROTTLE_BPS_TOTAL].avg;
97         info->bps_rd  = cfg.buckets[THROTTLE_BPS_READ].avg;
98         info->bps_wr  = cfg.buckets[THROTTLE_BPS_WRITE].avg;
99 
100         info->iops    = cfg.buckets[THROTTLE_OPS_TOTAL].avg;
101         info->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg;
102         info->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg;
103 
104         info->has_bps_max     = cfg.buckets[THROTTLE_BPS_TOTAL].max;
105         info->bps_max         = cfg.buckets[THROTTLE_BPS_TOTAL].max;
106         info->has_bps_rd_max  = cfg.buckets[THROTTLE_BPS_READ].max;
107         info->bps_rd_max      = cfg.buckets[THROTTLE_BPS_READ].max;
108         info->has_bps_wr_max  = cfg.buckets[THROTTLE_BPS_WRITE].max;
109         info->bps_wr_max      = cfg.buckets[THROTTLE_BPS_WRITE].max;
110 
111         info->has_iops_max    = cfg.buckets[THROTTLE_OPS_TOTAL].max;
112         info->iops_max        = cfg.buckets[THROTTLE_OPS_TOTAL].max;
113         info->has_iops_rd_max = cfg.buckets[THROTTLE_OPS_READ].max;
114         info->iops_rd_max     = cfg.buckets[THROTTLE_OPS_READ].max;
115         info->has_iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max;
116         info->iops_wr_max     = cfg.buckets[THROTTLE_OPS_WRITE].max;
117 
118         info->has_bps_max_length     = info->has_bps_max;
119         info->bps_max_length         =
120             cfg.buckets[THROTTLE_BPS_TOTAL].burst_length;
121         info->has_bps_rd_max_length  = info->has_bps_rd_max;
122         info->bps_rd_max_length      =
123             cfg.buckets[THROTTLE_BPS_READ].burst_length;
124         info->has_bps_wr_max_length  = info->has_bps_wr_max;
125         info->bps_wr_max_length      =
126             cfg.buckets[THROTTLE_BPS_WRITE].burst_length;
127 
128         info->has_iops_max_length    = info->has_iops_max;
129         info->iops_max_length        =
130             cfg.buckets[THROTTLE_OPS_TOTAL].burst_length;
131         info->has_iops_rd_max_length = info->has_iops_rd_max;
132         info->iops_rd_max_length     =
133             cfg.buckets[THROTTLE_OPS_READ].burst_length;
134         info->has_iops_wr_max_length = info->has_iops_wr_max;
135         info->iops_wr_max_length     =
136             cfg.buckets[THROTTLE_OPS_WRITE].burst_length;
137 
138         info->has_iops_size = cfg.op_size;
139         info->iops_size = cfg.op_size;
140 
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         /* stop gathering data for flat output */
160         if (flat) {
161             break;
162         }
163 
164         if (bs0->drv && bdrv_filter_or_cow_child(bs0)) {
165             /*
166              * Put any filtered child here (for backwards compatibility to when
167              * we put bs0->backing here, which might be any filtered child).
168              */
169             info->backing_file_depth++;
170             bs0 = bdrv_filter_or_cow_bs(bs0);
171             p_image_info = &((*p_image_info)->backing_image);
172         } else {
173             break;
174         }
175 
176         /* Skip automatically inserted nodes that the user isn't aware of for
177          * query-block (blk != NULL), but not for query-named-block-nodes */
178         if (blk) {
179             bs0 = bdrv_skip_implicit_filters(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 *head = NULL, **tail = &head;
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         info->icount        = sn_tab[i].icount;
230         info->has_icount    = sn_tab[i].icount != -1ULL;
231 
232         QAPI_LIST_APPEND(tail, info);
233     }
234 
235     g_free(sn_tab);
236     *p_list = head;
237     return 0;
238 }
239 
240 /**
241  * bdrv_query_image_info:
242  * @bs: block device to examine
243  * @p_info: location to store image information
244  * @errp: location to store error information
245  *
246  * Store "flat" image information in @p_info.
247  *
248  * "Flat" means it does *not* query backing image information,
249  * i.e. (*pinfo)->has_backing_image will be set to false and
250  * (*pinfo)->backing_image to NULL even when the image does in fact have
251  * a backing image.
252  *
253  * @p_info will be set only on success. On error, store error in @errp.
254  */
255 void bdrv_query_image_info(BlockDriverState *bs,
256                            ImageInfo **p_info,
257                            Error **errp)
258 {
259     int64_t size;
260     const char *backing_filename;
261     BlockDriverInfo bdi;
262     int ret;
263     Error *err = NULL;
264     ImageInfo *info;
265 
266     aio_context_acquire(bdrv_get_aio_context(bs));
267 
268     size = bdrv_getlength(bs);
269     if (size < 0) {
270         error_setg_errno(errp, -size, "Can't get image size '%s'",
271                          bs->exact_filename);
272         goto out;
273     }
274 
275     bdrv_refresh_filename(bs);
276 
277     info = g_new0(ImageInfo, 1);
278     info->filename        = g_strdup(bs->filename);
279     info->format          = g_strdup(bdrv_get_format_name(bs));
280     info->virtual_size    = size;
281     info->actual_size     = bdrv_get_allocated_file_size(bs);
282     info->has_actual_size = info->actual_size >= 0;
283     if (bs->encrypted) {
284         info->encrypted = true;
285         info->has_encrypted = true;
286     }
287     if (bdrv_get_info(bs, &bdi) >= 0) {
288         if (bdi.cluster_size != 0) {
289             info->cluster_size = bdi.cluster_size;
290             info->has_cluster_size = true;
291         }
292         info->dirty_flag = bdi.is_dirty;
293         info->has_dirty_flag = true;
294     }
295     info->format_specific = bdrv_get_specific_info(bs, &err);
296     if (err) {
297         error_propagate(errp, err);
298         qapi_free_ImageInfo(info);
299         goto out;
300     }
301     backing_filename = bs->backing_file;
302     if (backing_filename[0] != '\0') {
303         char *backing_filename2;
304 
305         info->backing_filename = g_strdup(backing_filename);
306         backing_filename2 = bdrv_get_full_backing_filename(bs, NULL);
307 
308         /* Always report the full_backing_filename if present, even if it's the
309          * same as backing_filename. That they are same is useful info. */
310         if (backing_filename2) {
311             info->full_backing_filename = g_strdup(backing_filename2);
312         }
313 
314         if (bs->backing_format[0]) {
315             info->backing_filename_format = g_strdup(bs->backing_format);
316         }
317         g_free(backing_filename2);
318     }
319 
320     ret = bdrv_query_snapshot_info_list(bs, &info->snapshots, &err);
321     switch (ret) {
322     case 0:
323         if (info->snapshots) {
324             info->has_snapshots = true;
325         }
326         break;
327     /* recoverable error */
328     case -ENOMEDIUM:
329     case -ENOTSUP:
330         error_free(err);
331         break;
332     default:
333         error_propagate(errp, err);
334         qapi_free_ImageInfo(info);
335         goto out;
336     }
337 
338     *p_info = info;
339 
340 out:
341     aio_context_release(bdrv_get_aio_context(bs));
342 }
343 
344 /* @p_info will be set only on success. */
345 static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
346                             Error **errp)
347 {
348     BlockInfo *info = g_malloc0(sizeof(*info));
349     BlockDriverState *bs = blk_bs(blk);
350     char *qdev;
351 
352     /* Skip automatically inserted nodes that the user isn't aware of */
353     bs = bdrv_skip_implicit_filters(bs);
354 
355     info->device = g_strdup(blk_name(blk));
356     info->type = g_strdup("unknown");
357     info->locked = blk_dev_is_medium_locked(blk);
358     info->removable = blk_dev_has_removable_media(blk);
359 
360     qdev = blk_get_attached_dev_id(blk);
361     if (qdev && *qdev) {
362         info->qdev = qdev;
363     } else {
364         g_free(qdev);
365     }
366 
367     if (blk_dev_has_tray(blk)) {
368         info->has_tray_open = true;
369         info->tray_open = blk_dev_is_tray_open(blk);
370     }
371 
372     if (blk_iostatus_is_enabled(blk)) {
373         info->has_io_status = true;
374         info->io_status = blk_iostatus(blk);
375     }
376 
377     if (bs && bs->drv) {
378         info->inserted = bdrv_block_device_info(blk, bs, false, errp);
379         if (info->inserted == NULL) {
380             goto err;
381         }
382     }
383 
384     *p_info = info;
385     return;
386 
387  err:
388     qapi_free_BlockInfo(info);
389 }
390 
391 static uint64List *uint64_list(uint64_t *list, int size)
392 {
393     int i;
394     uint64List *out_list = NULL;
395     uint64List **tail = &out_list;
396 
397     for (i = 0; i < size; i++) {
398         QAPI_LIST_APPEND(tail, list[i]);
399     }
400 
401     return out_list;
402 }
403 
404 static BlockLatencyHistogramInfo *
405 bdrv_latency_histogram_stats(BlockLatencyHistogram *hist)
406 {
407     BlockLatencyHistogramInfo *info;
408 
409     if (!hist->bins) {
410         return NULL;
411     }
412 
413     info = g_new0(BlockLatencyHistogramInfo, 1);
414     info->boundaries = uint64_list(hist->boundaries, hist->nbins - 1);
415     info->bins = uint64_list(hist->bins, hist->nbins);
416     return info;
417 }
418 
419 static void bdrv_query_blk_stats(BlockDeviceStats *ds, BlockBackend *blk)
420 {
421     BlockAcctStats *stats = blk_get_stats(blk);
422     BlockAcctTimedStats *ts = NULL;
423     BlockLatencyHistogram *hgram;
424 
425     ds->rd_bytes = stats->nr_bytes[BLOCK_ACCT_READ];
426     ds->wr_bytes = stats->nr_bytes[BLOCK_ACCT_WRITE];
427     ds->unmap_bytes = stats->nr_bytes[BLOCK_ACCT_UNMAP];
428     ds->rd_operations = stats->nr_ops[BLOCK_ACCT_READ];
429     ds->wr_operations = stats->nr_ops[BLOCK_ACCT_WRITE];
430     ds->unmap_operations = stats->nr_ops[BLOCK_ACCT_UNMAP];
431 
432     ds->failed_rd_operations = stats->failed_ops[BLOCK_ACCT_READ];
433     ds->failed_wr_operations = stats->failed_ops[BLOCK_ACCT_WRITE];
434     ds->failed_flush_operations = stats->failed_ops[BLOCK_ACCT_FLUSH];
435     ds->failed_unmap_operations = stats->failed_ops[BLOCK_ACCT_UNMAP];
436 
437     ds->invalid_rd_operations = stats->invalid_ops[BLOCK_ACCT_READ];
438     ds->invalid_wr_operations = stats->invalid_ops[BLOCK_ACCT_WRITE];
439     ds->invalid_flush_operations =
440         stats->invalid_ops[BLOCK_ACCT_FLUSH];
441     ds->invalid_unmap_operations = stats->invalid_ops[BLOCK_ACCT_UNMAP];
442 
443     ds->rd_merged = stats->merged[BLOCK_ACCT_READ];
444     ds->wr_merged = stats->merged[BLOCK_ACCT_WRITE];
445     ds->unmap_merged = stats->merged[BLOCK_ACCT_UNMAP];
446     ds->flush_operations = stats->nr_ops[BLOCK_ACCT_FLUSH];
447     ds->wr_total_time_ns = stats->total_time_ns[BLOCK_ACCT_WRITE];
448     ds->rd_total_time_ns = stats->total_time_ns[BLOCK_ACCT_READ];
449     ds->flush_total_time_ns = stats->total_time_ns[BLOCK_ACCT_FLUSH];
450     ds->unmap_total_time_ns = stats->total_time_ns[BLOCK_ACCT_UNMAP];
451 
452     ds->has_idle_time_ns = stats->last_access_time_ns > 0;
453     if (ds->has_idle_time_ns) {
454         ds->idle_time_ns = block_acct_idle_time_ns(stats);
455     }
456 
457     ds->account_invalid = stats->account_invalid;
458     ds->account_failed = stats->account_failed;
459 
460     while ((ts = block_acct_interval_next(stats, ts))) {
461         BlockDeviceTimedStats *dev_stats = g_malloc0(sizeof(*dev_stats));
462 
463         TimedAverage *rd = &ts->latency[BLOCK_ACCT_READ];
464         TimedAverage *wr = &ts->latency[BLOCK_ACCT_WRITE];
465         TimedAverage *fl = &ts->latency[BLOCK_ACCT_FLUSH];
466 
467         dev_stats->interval_length = ts->interval_length;
468 
469         dev_stats->min_rd_latency_ns = timed_average_min(rd);
470         dev_stats->max_rd_latency_ns = timed_average_max(rd);
471         dev_stats->avg_rd_latency_ns = timed_average_avg(rd);
472 
473         dev_stats->min_wr_latency_ns = timed_average_min(wr);
474         dev_stats->max_wr_latency_ns = timed_average_max(wr);
475         dev_stats->avg_wr_latency_ns = timed_average_avg(wr);
476 
477         dev_stats->min_flush_latency_ns = timed_average_min(fl);
478         dev_stats->max_flush_latency_ns = timed_average_max(fl);
479         dev_stats->avg_flush_latency_ns = timed_average_avg(fl);
480 
481         dev_stats->avg_rd_queue_depth =
482             block_acct_queue_depth(ts, BLOCK_ACCT_READ);
483         dev_stats->avg_wr_queue_depth =
484             block_acct_queue_depth(ts, BLOCK_ACCT_WRITE);
485 
486         QAPI_LIST_PREPEND(ds->timed_stats, dev_stats);
487     }
488 
489     hgram = stats->latency_histogram;
490     ds->rd_latency_histogram
491         = bdrv_latency_histogram_stats(&hgram[BLOCK_ACCT_READ]);
492     ds->wr_latency_histogram
493         = bdrv_latency_histogram_stats(&hgram[BLOCK_ACCT_WRITE]);
494     ds->flush_latency_histogram
495         = bdrv_latency_histogram_stats(&hgram[BLOCK_ACCT_FLUSH]);
496 }
497 
498 static BlockStats *bdrv_query_bds_stats(BlockDriverState *bs,
499                                         bool blk_level)
500 {
501     BdrvChild *parent_child;
502     BlockDriverState *filter_or_cow_bs;
503     BlockStats *s = NULL;
504 
505     s = g_malloc0(sizeof(*s));
506     s->stats = g_malloc0(sizeof(*s->stats));
507 
508     if (!bs) {
509         return s;
510     }
511 
512     /* Skip automatically inserted nodes that the user isn't aware of in
513      * a BlockBackend-level command. Stay at the exact node for a node-level
514      * command. */
515     if (blk_level) {
516         bs = bdrv_skip_implicit_filters(bs);
517     }
518 
519     if (bdrv_get_node_name(bs)[0]) {
520         s->node_name = g_strdup(bdrv_get_node_name(bs));
521     }
522 
523     s->stats->wr_highest_offset = stat64_get(&bs->wr_highest_offset);
524 
525     s->driver_specific = bdrv_get_specific_stats(bs);
526 
527     parent_child = bdrv_primary_child(bs);
528     if (!parent_child ||
529         !(parent_child->role & (BDRV_CHILD_DATA | BDRV_CHILD_FILTERED)))
530     {
531         BdrvChild *c;
532 
533         /*
534          * Look for a unique data-storing child.  We do not need to look for
535          * filtered children, as there would be only one and it would have been
536          * the primary child.
537          */
538         parent_child = NULL;
539         QLIST_FOREACH(c, &bs->children, next) {
540             if (c->role & BDRV_CHILD_DATA) {
541                 if (parent_child) {
542                     /*
543                      * There are multiple data-storing children and we cannot
544                      * choose between them.
545                      */
546                     parent_child = NULL;
547                     break;
548                 }
549                 parent_child = c;
550             }
551         }
552     }
553     if (parent_child) {
554         s->parent = bdrv_query_bds_stats(parent_child->bs, blk_level);
555     }
556 
557     filter_or_cow_bs = bdrv_filter_or_cow_bs(bs);
558     if (blk_level && filter_or_cow_bs) {
559         /*
560          * Put any filtered or COW child here (for backwards
561          * compatibility to when we put bs0->backing here, which might
562          * be either)
563          */
564         s->backing = bdrv_query_bds_stats(filter_or_cow_bs, blk_level);
565     }
566 
567     return s;
568 }
569 
570 BlockInfoList *qmp_query_block(Error **errp)
571 {
572     BlockInfoList *head = NULL, **p_next = &head;
573     BlockBackend *blk;
574     Error *local_err = NULL;
575 
576     for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
577         BlockInfoList *info;
578 
579         if (!*blk_name(blk) && !blk_get_attached_dev(blk)) {
580             continue;
581         }
582 
583         info = g_malloc0(sizeof(*info));
584         bdrv_query_info(blk, &info->value, &local_err);
585         if (local_err) {
586             error_propagate(errp, local_err);
587             g_free(info);
588             qapi_free_BlockInfoList(head);
589             return NULL;
590         }
591 
592         *p_next = info;
593         p_next = &info->next;
594     }
595 
596     return head;
597 }
598 
599 BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
600                                      bool query_nodes,
601                                      Error **errp)
602 {
603     BlockStatsList *head = NULL, **tail = &head;
604     BlockBackend *blk;
605     BlockDriverState *bs;
606 
607     /* Just to be safe if query_nodes is not always initialized */
608     if (has_query_nodes && query_nodes) {
609         for (bs = bdrv_next_node(NULL); bs; bs = bdrv_next_node(bs)) {
610             AioContext *ctx = bdrv_get_aio_context(bs);
611 
612             aio_context_acquire(ctx);
613             QAPI_LIST_APPEND(tail, bdrv_query_bds_stats(bs, false));
614             aio_context_release(ctx);
615         }
616     } else {
617         for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
618             AioContext *ctx = blk_get_aio_context(blk);
619             BlockStats *s;
620             char *qdev;
621 
622             if (!*blk_name(blk) && !blk_get_attached_dev(blk)) {
623                 continue;
624             }
625 
626             aio_context_acquire(ctx);
627             s = bdrv_query_bds_stats(blk_bs(blk), true);
628             s->device = g_strdup(blk_name(blk));
629 
630             qdev = blk_get_attached_dev_id(blk);
631             if (qdev && *qdev) {
632                 s->qdev = qdev;
633             } else {
634                 g_free(qdev);
635             }
636 
637             bdrv_query_blk_stats(s->stats, blk);
638             aio_context_release(ctx);
639 
640             QAPI_LIST_APPEND(tail, s);
641         }
642     }
643 
644     return head;
645 }
646 
647 void bdrv_snapshot_dump(QEMUSnapshotInfo *sn)
648 {
649     char clock_buf[128];
650     char icount_buf[128] = {0};
651     int64_t secs;
652     char *sizing = NULL;
653 
654     if (!sn) {
655         qemu_printf("%-10s%-17s%8s%20s%13s%11s",
656                     "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK", "ICOUNT");
657     } else {
658         g_autoptr(GDateTime) date = g_date_time_new_from_unix_local(sn->date_sec);
659         g_autofree char *date_buf = g_date_time_format(date, "%Y-%m-%d %H:%M:%S");
660 
661         secs = sn->vm_clock_nsec / 1000000000;
662         snprintf(clock_buf, sizeof(clock_buf),
663                  "%02d:%02d:%02d.%03d",
664                  (int)(secs / 3600),
665                  (int)((secs / 60) % 60),
666                  (int)(secs % 60),
667                  (int)((sn->vm_clock_nsec / 1000000) % 1000));
668         sizing = size_to_str(sn->vm_state_size);
669         if (sn->icount != -1ULL) {
670             snprintf(icount_buf, sizeof(icount_buf),
671                 "%"PRId64, sn->icount);
672         }
673         qemu_printf("%-9s %-16s %8s%20s%13s%11s",
674                     sn->id_str, sn->name,
675                     sizing,
676                     date_buf,
677                     clock_buf,
678                     icount_buf);
679     }
680     g_free(sizing);
681 }
682 
683 static void dump_qdict(int indentation, QDict *dict);
684 static void dump_qlist(int indentation, QList *list);
685 
686 static void dump_qobject(int comp_indent, QObject *obj)
687 {
688     switch (qobject_type(obj)) {
689         case QTYPE_QNUM: {
690             QNum *value = qobject_to(QNum, obj);
691             char *tmp = qnum_to_string(value);
692             qemu_printf("%s", tmp);
693             g_free(tmp);
694             break;
695         }
696         case QTYPE_QSTRING: {
697             QString *value = qobject_to(QString, obj);
698             qemu_printf("%s", qstring_get_str(value));
699             break;
700         }
701         case QTYPE_QDICT: {
702             QDict *value = qobject_to(QDict, obj);
703             dump_qdict(comp_indent, value);
704             break;
705         }
706         case QTYPE_QLIST: {
707             QList *value = qobject_to(QList, obj);
708             dump_qlist(comp_indent, value);
709             break;
710         }
711         case QTYPE_QBOOL: {
712             QBool *value = qobject_to(QBool, obj);
713             qemu_printf("%s", qbool_get_bool(value) ? "true" : "false");
714             break;
715         }
716         default:
717             abort();
718     }
719 }
720 
721 static void dump_qlist(int indentation, QList *list)
722 {
723     const QListEntry *entry;
724     int i = 0;
725 
726     for (entry = qlist_first(list); entry; entry = qlist_next(entry), i++) {
727         QType type = qobject_type(entry->value);
728         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
729         qemu_printf("%*s[%i]:%c", indentation * 4, "", i,
730                     composite ? '\n' : ' ');
731         dump_qobject(indentation + 1, entry->value);
732         if (!composite) {
733             qemu_printf("\n");
734         }
735     }
736 }
737 
738 static void dump_qdict(int indentation, QDict *dict)
739 {
740     const QDictEntry *entry;
741 
742     for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) {
743         QType type = qobject_type(entry->value);
744         bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
745         char *key = g_malloc(strlen(entry->key) + 1);
746         int i;
747 
748         /* replace dashes with spaces in key (variable) names */
749         for (i = 0; entry->key[i]; i++) {
750             key[i] = entry->key[i] == '-' ? ' ' : entry->key[i];
751         }
752         key[i] = 0;
753         qemu_printf("%*s%s:%c", indentation * 4, "", key,
754                     composite ? '\n' : ' ');
755         dump_qobject(indentation + 1, entry->value);
756         if (!composite) {
757             qemu_printf("\n");
758         }
759         g_free(key);
760     }
761 }
762 
763 void bdrv_image_info_specific_dump(ImageInfoSpecific *info_spec)
764 {
765     QObject *obj, *data;
766     Visitor *v = qobject_output_visitor_new(&obj);
767 
768     visit_type_ImageInfoSpecific(v, NULL, &info_spec, &error_abort);
769     visit_complete(v, &obj);
770     data = qdict_get(qobject_to(QDict, obj), "data");
771     dump_qobject(1, data);
772     qobject_unref(obj);
773     visit_free(v);
774 }
775 
776 void bdrv_image_info_dump(ImageInfo *info)
777 {
778     char *size_buf, *dsize_buf;
779     if (!info->has_actual_size) {
780         dsize_buf = g_strdup("unavailable");
781     } else {
782         dsize_buf = size_to_str(info->actual_size);
783     }
784     size_buf = size_to_str(info->virtual_size);
785     qemu_printf("image: %s\n"
786                 "file format: %s\n"
787                 "virtual size: %s (%" PRId64 " bytes)\n"
788                 "disk size: %s\n",
789                 info->filename, info->format, size_buf,
790                 info->virtual_size,
791                 dsize_buf);
792     g_free(size_buf);
793     g_free(dsize_buf);
794 
795     if (info->has_encrypted && info->encrypted) {
796         qemu_printf("encrypted: yes\n");
797     }
798 
799     if (info->has_cluster_size) {
800         qemu_printf("cluster_size: %" PRId64 "\n",
801                     info->cluster_size);
802     }
803 
804     if (info->has_dirty_flag && info->dirty_flag) {
805         qemu_printf("cleanly shut down: no\n");
806     }
807 
808     if (info->backing_filename) {
809         qemu_printf("backing file: %s", info->backing_filename);
810         if (!info->full_backing_filename) {
811             qemu_printf(" (cannot determine actual path)");
812         } else if (strcmp(info->backing_filename,
813                           info->full_backing_filename) != 0) {
814             qemu_printf(" (actual path: %s)", info->full_backing_filename);
815         }
816         qemu_printf("\n");
817         if (info->backing_filename_format) {
818             qemu_printf("backing file format: %s\n",
819                         info->backing_filename_format);
820         }
821     }
822 
823     if (info->has_snapshots) {
824         SnapshotInfoList *elem;
825 
826         qemu_printf("Snapshot list:\n");
827         bdrv_snapshot_dump(NULL);
828         qemu_printf("\n");
829 
830         /* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but
831          * we convert to the block layer's native QEMUSnapshotInfo for now.
832          */
833         for (elem = info->snapshots; elem; elem = elem->next) {
834             QEMUSnapshotInfo sn = {
835                 .vm_state_size = elem->value->vm_state_size,
836                 .date_sec = elem->value->date_sec,
837                 .date_nsec = elem->value->date_nsec,
838                 .vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +
839                                  elem->value->vm_clock_nsec,
840                 .icount = elem->value->has_icount ?
841                           elem->value->icount : -1ULL,
842             };
843 
844             pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);
845             pstrcpy(sn.name, sizeof(sn.name), elem->value->name);
846             bdrv_snapshot_dump(&sn);
847             qemu_printf("\n");
848         }
849     }
850 
851     if (info->format_specific) {
852         qemu_printf("Format specific information:\n");
853         bdrv_image_info_specific_dump(info->format_specific);
854     }
855 }
856