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qemu/block/qapi.c
Kevin Wolf d3c8c67469 block: Skip implicit nodes in query-block/blockstats 
Commits 0db832f and 6cdbceb introduced the automatic insertion of filter
nodes above the top layer of mirror and commit block jobs. The
assumption made there was that since libvirt doesn't do node-level
management of the block layer yet, it shouldn't be affected by added
nodes.

This is true as far as commands issued by libvirt are concerned. It only
uses BlockBackend names to address nodes, so any operations it performs
still operate on the root of the tree as intended.

However, the assumption breaks down when you consider query commands,
which return data for the wrong node now. These commands also return
information on some child nodes (bs->file and/or bs->backing), which
libvirt does make use of, and which refer to the wrong nodes, too.

One of the consequences is that oVirt gets wrong information about the
image size and stops the VM in response as long as a mirror or commit
job is running:

https://bugzilla.redhat.com/show_bug.cgi?id=1470634

This patch fixes the problem by hiding the implicit nodes created
automatically by the mirror and commit block jobs in the output of
query-block and BlockBackend-based query-blockstats as long as the user
doesn't indicate that they are aware of those nodes by providing a node
name for them in the QMP command to start the block job.

The node-based commands query-named-block-nodes and query-blockstats
with query-nodes=true still show all nodes, including implicit ones.
This ensures that users that are capable of node-level management can
still access the full information; users that only know BlockBackends
won't use these commands.

Cc: qemu-stable@nongnu.org
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Tested-by: Eric Blake <eblake@redhat.com>
2017-07-24 15:06:04 +02:00

804 lines
26 KiB
C
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/*
* Block layer qmp and info dump related functions
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "block/qapi.h"
#include "block/block_int.h"
#include "block/throttle-groups.h"
#include "block/write-threshold.h"
#include "qmp-commands.h"
#include "qapi-visit.h"
#include "qapi/qobject-output-visitor.h"
#include "qapi/qmp/types.h"
#include "sysemu/block-backend.h"
#include "qemu/cutils.h"
BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
BlockDriverState *bs, Error **errp)
{
ImageInfo **p_image_info;
BlockDriverState *bs0;
BlockDeviceInfo *info = g_malloc0(sizeof(*info));
info->file = g_strdup(bs->filename);
info->ro = bs->read_only;
info->drv = g_strdup(bs->drv->format_name);
info->encrypted = bs->encrypted;
info->encryption_key_missing = false;
info->cache = g_new(BlockdevCacheInfo, 1);
*info->cache = (BlockdevCacheInfo) {
.writeback = blk ? blk_enable_write_cache(blk) : true,
.direct = !!(bs->open_flags & BDRV_O_NOCACHE),
.no_flush = !!(bs->open_flags & BDRV_O_NO_FLUSH),
};
if (bs->node_name[0]) {
info->has_node_name = true;
info->node_name = g_strdup(bs->node_name);
}
if (bs->backing_file[0]) {
info->has_backing_file = true;
info->backing_file = g_strdup(bs->backing_file);
}
info->detect_zeroes = bs->detect_zeroes;
if (blk && blk_get_public(blk)->throttle_state) {
ThrottleConfig cfg;
throttle_group_get_config(blk, &cfg);
info->bps = cfg.buckets[THROTTLE_BPS_TOTAL].avg;
info->bps_rd = cfg.buckets[THROTTLE_BPS_READ].avg;
info->bps_wr = cfg.buckets[THROTTLE_BPS_WRITE].avg;
info->iops = cfg.buckets[THROTTLE_OPS_TOTAL].avg;
info->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg;
info->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg;
info->has_bps_max = cfg.buckets[THROTTLE_BPS_TOTAL].max;
info->bps_max = cfg.buckets[THROTTLE_BPS_TOTAL].max;
info->has_bps_rd_max = cfg.buckets[THROTTLE_BPS_READ].max;
info->bps_rd_max = cfg.buckets[THROTTLE_BPS_READ].max;
info->has_bps_wr_max = cfg.buckets[THROTTLE_BPS_WRITE].max;
info->bps_wr_max = cfg.buckets[THROTTLE_BPS_WRITE].max;
info->has_iops_max = cfg.buckets[THROTTLE_OPS_TOTAL].max;
info->iops_max = cfg.buckets[THROTTLE_OPS_TOTAL].max;
info->has_iops_rd_max = cfg.buckets[THROTTLE_OPS_READ].max;
info->iops_rd_max = cfg.buckets[THROTTLE_OPS_READ].max;
info->has_iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max;
info->iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max;
info->has_bps_max_length = info->has_bps_max;
info->bps_max_length =
cfg.buckets[THROTTLE_BPS_TOTAL].burst_length;
info->has_bps_rd_max_length = info->has_bps_rd_max;
info->bps_rd_max_length =
cfg.buckets[THROTTLE_BPS_READ].burst_length;
info->has_bps_wr_max_length = info->has_bps_wr_max;
info->bps_wr_max_length =
cfg.buckets[THROTTLE_BPS_WRITE].burst_length;
info->has_iops_max_length = info->has_iops_max;
info->iops_max_length =
cfg.buckets[THROTTLE_OPS_TOTAL].burst_length;
info->has_iops_rd_max_length = info->has_iops_rd_max;
info->iops_rd_max_length =
cfg.buckets[THROTTLE_OPS_READ].burst_length;
info->has_iops_wr_max_length = info->has_iops_wr_max;
info->iops_wr_max_length =
cfg.buckets[THROTTLE_OPS_WRITE].burst_length;
info->has_iops_size = cfg.op_size;
info->iops_size = cfg.op_size;
info->has_group = true;
info->group = g_strdup(throttle_group_get_name(blk));
}
info->write_threshold = bdrv_write_threshold_get(bs);
bs0 = bs;
p_image_info = &info->image;
info->backing_file_depth = 0;
while (1) {
Error *local_err = NULL;
bdrv_query_image_info(bs0, p_image_info, &local_err);
if (local_err) {
error_propagate(errp, local_err);
qapi_free_BlockDeviceInfo(info);
return NULL;
}
if (bs0->drv && bs0->backing) {
info->backing_file_depth++;
bs0 = bs0->backing->bs;
(*p_image_info)->has_backing_image = true;
p_image_info = &((*p_image_info)->backing_image);
} else {
break;
}
/* Skip automatically inserted nodes that the user isn't aware of for
* query-block (blk != NULL), but not for query-named-block-nodes */
while (blk && bs0 && bs0->drv && bs0->implicit) {
bs0 = backing_bs(bs0);
}
}
return info;
}
/*
* Returns 0 on success, with *p_list either set to describe snapshot
* information, or NULL because there are no snapshots. Returns -errno on
* error, with *p_list untouched.
*/
int bdrv_query_snapshot_info_list(BlockDriverState *bs,
SnapshotInfoList **p_list,
Error **errp)
{
int i, sn_count;
QEMUSnapshotInfo *sn_tab = NULL;
SnapshotInfoList *info_list, *cur_item = NULL, *head = NULL;
SnapshotInfo *info;
sn_count = bdrv_snapshot_list(bs, &sn_tab);
if (sn_count < 0) {
const char *dev = bdrv_get_device_name(bs);
switch (sn_count) {
case -ENOMEDIUM:
error_setg(errp, "Device '%s' is not inserted", dev);
break;
case -ENOTSUP:
error_setg(errp,
"Device '%s' does not support internal snapshots",
dev);
break;
default:
error_setg_errno(errp, -sn_count,
"Can't list snapshots of device '%s'", dev);
break;
}
return sn_count;
}
for (i = 0; i < sn_count; i++) {
info = g_new0(SnapshotInfo, 1);
info->id = g_strdup(sn_tab[i].id_str);
info->name = g_strdup(sn_tab[i].name);
info->vm_state_size = sn_tab[i].vm_state_size;
info->date_sec = sn_tab[i].date_sec;
info->date_nsec = sn_tab[i].date_nsec;
info->vm_clock_sec = sn_tab[i].vm_clock_nsec / 1000000000;
info->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
info_list = g_new0(SnapshotInfoList, 1);
info_list->value = info;
/* XXX: waiting for the qapi to support qemu-queue.h types */
if (!cur_item) {
head = cur_item = info_list;
} else {
cur_item->next = info_list;
cur_item = info_list;
}
}
g_free(sn_tab);
*p_list = head;
return 0;
}
/**
* bdrv_query_image_info:
* @bs: block device to examine
* @p_info: location to store image information
* @errp: location to store error information
*
* Store "flat" image information in @p_info.
*
* "Flat" means it does *not* query backing image information,
* i.e. (*pinfo)->has_backing_image will be set to false and
* (*pinfo)->backing_image to NULL even when the image does in fact have
* a backing image.
*
* @p_info will be set only on success. On error, store error in @errp.
*/
void bdrv_query_image_info(BlockDriverState *bs,
ImageInfo **p_info,
Error **errp)
{
int64_t size;
const char *backing_filename;
BlockDriverInfo bdi;
int ret;
Error *err = NULL;
ImageInfo *info;
aio_context_acquire(bdrv_get_aio_context(bs));
size = bdrv_getlength(bs);
if (size < 0) {
error_setg_errno(errp, -size, "Can't get image size '%s'",
bs->exact_filename);
goto out;
}
info = g_new0(ImageInfo, 1);
info->filename = g_strdup(bs->filename);
info->format = g_strdup(bdrv_get_format_name(bs));
info->virtual_size = size;
info->actual_size = bdrv_get_allocated_file_size(bs);
info->has_actual_size = info->actual_size >= 0;
if (bdrv_is_encrypted(bs)) {
info->encrypted = true;
info->has_encrypted = true;
}
if (bdrv_get_info(bs, &bdi) >= 0) {
if (bdi.cluster_size != 0) {
info->cluster_size = bdi.cluster_size;
info->has_cluster_size = true;
}
info->dirty_flag = bdi.is_dirty;
info->has_dirty_flag = true;
}
info->format_specific = bdrv_get_specific_info(bs);
info->has_format_specific = info->format_specific != NULL;
backing_filename = bs->backing_file;
if (backing_filename[0] != '\0') {
char *backing_filename2 = g_malloc0(PATH_MAX);
info->backing_filename = g_strdup(backing_filename);
info->has_backing_filename = true;
bdrv_get_full_backing_filename(bs, backing_filename2, PATH_MAX, &err);
if (err) {
/* Can't reconstruct the full backing filename, so we must omit
* this field and apply a Best Effort to this query. */
g_free(backing_filename2);
backing_filename2 = NULL;
error_free(err);
err = NULL;
}
/* Always report the full_backing_filename if present, even if it's the
* same as backing_filename. That they are same is useful info. */
if (backing_filename2) {
info->full_backing_filename = g_strdup(backing_filename2);
info->has_full_backing_filename = true;
}
if (bs->backing_format[0]) {
info->backing_filename_format = g_strdup(bs->backing_format);
info->has_backing_filename_format = true;
}
g_free(backing_filename2);
}
ret = bdrv_query_snapshot_info_list(bs, &info->snapshots, &err);
switch (ret) {
case 0:
if (info->snapshots) {
info->has_snapshots = true;
}
break;
/* recoverable error */
case -ENOMEDIUM:
case -ENOTSUP:
error_free(err);
break;
default:
error_propagate(errp, err);
qapi_free_ImageInfo(info);
goto out;
}
*p_info = info;
out:
aio_context_release(bdrv_get_aio_context(bs));
}
/* @p_info will be set only on success. */
static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
Error **errp)
{
BlockInfo *info = g_malloc0(sizeof(*info));
BlockDriverState *bs = blk_bs(blk);
char *qdev;
/* Skip automatically inserted nodes that the user isn't aware of */
while (bs && bs->drv && bs->implicit) {
bs = backing_bs(bs);
}
info->device = g_strdup(blk_name(blk));
info->type = g_strdup("unknown");
info->locked = blk_dev_is_medium_locked(blk);
info->removable = blk_dev_has_removable_media(blk);
qdev = blk_get_attached_dev_id(blk);
if (qdev && *qdev) {
info->has_qdev = true;
info->qdev = qdev;
} else {
g_free(qdev);
}
if (blk_dev_has_tray(blk)) {
info->has_tray_open = true;
info->tray_open = blk_dev_is_tray_open(blk);
}
if (blk_iostatus_is_enabled(blk)) {
info->has_io_status = true;
info->io_status = blk_iostatus(blk);
}
if (bs && !QLIST_EMPTY(&bs->dirty_bitmaps)) {
info->has_dirty_bitmaps = true;
info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
}
if (bs && bs->drv) {
info->has_inserted = true;
info->inserted = bdrv_block_device_info(blk, bs, errp);
if (info->inserted == NULL) {
goto err;
}
}
*p_info = info;
return;
err:
qapi_free_BlockInfo(info);
}
static void bdrv_query_blk_stats(BlockDeviceStats *ds, BlockBackend *blk)
{
BlockAcctStats *stats = blk_get_stats(blk);
BlockAcctTimedStats *ts = NULL;
ds->rd_bytes = stats->nr_bytes[BLOCK_ACCT_READ];
ds->wr_bytes = stats->nr_bytes[BLOCK_ACCT_WRITE];
ds->rd_operations = stats->nr_ops[BLOCK_ACCT_READ];
ds->wr_operations = stats->nr_ops[BLOCK_ACCT_WRITE];
ds->failed_rd_operations = stats->failed_ops[BLOCK_ACCT_READ];
ds->failed_wr_operations = stats->failed_ops[BLOCK_ACCT_WRITE];
ds->failed_flush_operations = stats->failed_ops[BLOCK_ACCT_FLUSH];
ds->invalid_rd_operations = stats->invalid_ops[BLOCK_ACCT_READ];
ds->invalid_wr_operations = stats->invalid_ops[BLOCK_ACCT_WRITE];
ds->invalid_flush_operations =
stats->invalid_ops[BLOCK_ACCT_FLUSH];
ds->rd_merged = stats->merged[BLOCK_ACCT_READ];
ds->wr_merged = stats->merged[BLOCK_ACCT_WRITE];
ds->flush_operations = stats->nr_ops[BLOCK_ACCT_FLUSH];
ds->wr_total_time_ns = stats->total_time_ns[BLOCK_ACCT_WRITE];
ds->rd_total_time_ns = stats->total_time_ns[BLOCK_ACCT_READ];
ds->flush_total_time_ns = stats->total_time_ns[BLOCK_ACCT_FLUSH];
ds->has_idle_time_ns = stats->last_access_time_ns > 0;
if (ds->has_idle_time_ns) {
ds->idle_time_ns = block_acct_idle_time_ns(stats);
}
ds->account_invalid = stats->account_invalid;
ds->account_failed = stats->account_failed;
while ((ts = block_acct_interval_next(stats, ts))) {
BlockDeviceTimedStatsList *timed_stats =
g_malloc0(sizeof(*timed_stats));
BlockDeviceTimedStats *dev_stats = g_malloc0(sizeof(*dev_stats));
timed_stats->next = ds->timed_stats;
timed_stats->value = dev_stats;
ds->timed_stats = timed_stats;
TimedAverage *rd = &ts->latency[BLOCK_ACCT_READ];
TimedAverage *wr = &ts->latency[BLOCK_ACCT_WRITE];
TimedAverage *fl = &ts->latency[BLOCK_ACCT_FLUSH];
dev_stats->interval_length = ts->interval_length;
dev_stats->min_rd_latency_ns = timed_average_min(rd);
dev_stats->max_rd_latency_ns = timed_average_max(rd);
dev_stats->avg_rd_latency_ns = timed_average_avg(rd);
dev_stats->min_wr_latency_ns = timed_average_min(wr);
dev_stats->max_wr_latency_ns = timed_average_max(wr);
dev_stats->avg_wr_latency_ns = timed_average_avg(wr);
dev_stats->min_flush_latency_ns = timed_average_min(fl);
dev_stats->max_flush_latency_ns = timed_average_max(fl);
dev_stats->avg_flush_latency_ns = timed_average_avg(fl);
dev_stats->avg_rd_queue_depth =
block_acct_queue_depth(ts, BLOCK_ACCT_READ);
dev_stats->avg_wr_queue_depth =
block_acct_queue_depth(ts, BLOCK_ACCT_WRITE);
}
}
static BlockStats *bdrv_query_bds_stats(BlockDriverState *bs,
bool blk_level)
{
BlockStats *s = NULL;
s = g_malloc0(sizeof(*s));
s->stats = g_malloc0(sizeof(*s->stats));
if (!bs) {
return s;
}
/* Skip automatically inserted nodes that the user isn't aware of in
* a BlockBackend-level command. Stay at the exact node for a node-level
* command. */
while (blk_level && bs->drv && bs->implicit) {
bs = backing_bs(bs);
assert(bs);
}
if (bdrv_get_node_name(bs)[0]) {
s->has_node_name = true;
s->node_name = g_strdup(bdrv_get_node_name(bs));
}
s->stats->wr_highest_offset = stat64_get(&bs->wr_highest_offset);
if (bs->file) {
s->has_parent = true;
s->parent = bdrv_query_bds_stats(bs->file->bs, blk_level);
}
if (blk_level && bs->backing) {
s->has_backing = true;
s->backing = bdrv_query_bds_stats(bs->backing->bs, blk_level);
}
return s;
}
BlockInfoList *qmp_query_block(Error **errp)
{
BlockInfoList *head = NULL, **p_next = &head;
BlockBackend *blk;
Error *local_err = NULL;
for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
BlockInfoList *info;
if (!*blk_name(blk) && !blk_get_attached_dev(blk)) {
continue;
}
info = g_malloc0(sizeof(*info));
bdrv_query_info(blk, &info->value, &local_err);
if (local_err) {
error_propagate(errp, local_err);
g_free(info);
qapi_free_BlockInfoList(head);
return NULL;
}
*p_next = info;
p_next = &info->next;
}
return head;
}
BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
bool query_nodes,
Error **errp)
{
BlockStatsList *head = NULL, **p_next = &head;
BlockBackend *blk;
BlockDriverState *bs;
/* Just to be safe if query_nodes is not always initialized */
if (has_query_nodes && query_nodes) {
for (bs = bdrv_next_node(NULL); bs; bs = bdrv_next_node(bs)) {
BlockStatsList *info = g_malloc0(sizeof(*info));
AioContext *ctx = bdrv_get_aio_context(bs);
aio_context_acquire(ctx);
info->value = bdrv_query_bds_stats(bs, false);
aio_context_release(ctx);
*p_next = info;
p_next = &info->next;
}
} else {
for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
BlockStatsList *info = g_malloc0(sizeof(*info));
AioContext *ctx = blk_get_aio_context(blk);
BlockStats *s;
aio_context_acquire(ctx);
s = bdrv_query_bds_stats(blk_bs(blk), true);
s->has_device = true;
s->device = g_strdup(blk_name(blk));
bdrv_query_blk_stats(s->stats, blk);
aio_context_release(ctx);
info->value = s;
*p_next = info;
p_next = &info->next;
}
}
return head;
}
#define NB_SUFFIXES 4
static char *get_human_readable_size(char *buf, int buf_size, int64_t size)
{
static const char suffixes[NB_SUFFIXES] = {'K', 'M', 'G', 'T'};
int64_t base;
int i;
if (size <= 999) {
snprintf(buf, buf_size, "%" PRId64, size);
} else {
base = 1024;
for (i = 0; i < NB_SUFFIXES; i++) {
if (size < (10 * base)) {
snprintf(buf, buf_size, "%0.1f%c",
(double)size / base,
suffixes[i]);
break;
} else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) {
snprintf(buf, buf_size, "%" PRId64 "%c",
((size + (base >> 1)) / base),
suffixes[i]);
break;
}
base = base * 1024;
}
}
return buf;
}
void bdrv_snapshot_dump(fprintf_function func_fprintf, void *f,
QEMUSnapshotInfo *sn)
{
char buf1[128], date_buf[128], clock_buf[128];
struct tm tm;
time_t ti;
int64_t secs;
if (!sn) {
func_fprintf(f,
"%-10s%-20s%7s%20s%15s",
"ID", "TAG", "VM SIZE", "DATE", "VM CLOCK");
} else {
ti = sn->date_sec;
localtime_r(&ti, &tm);
strftime(date_buf, sizeof(date_buf),
"%Y-%m-%d %H:%M:%S", &tm);
secs = sn->vm_clock_nsec / 1000000000;
snprintf(clock_buf, sizeof(clock_buf),
"%02d:%02d:%02d.%03d",
(int)(secs / 3600),
(int)((secs / 60) % 60),
(int)(secs % 60),
(int)((sn->vm_clock_nsec / 1000000) % 1000));
func_fprintf(f,
"%-10s%-20s%7s%20s%15s",
sn->id_str, sn->name,
get_human_readable_size(buf1, sizeof(buf1),
sn->vm_state_size),
date_buf,
clock_buf);
}
}
static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation,
QDict *dict);
static void dump_qlist(fprintf_function func_fprintf, void *f, int indentation,
QList *list);
static void dump_qobject(fprintf_function func_fprintf, void *f,
int comp_indent, QObject *obj)
{
switch (qobject_type(obj)) {
case QTYPE_QNUM: {
QNum *value = qobject_to_qnum(obj);
char *tmp = qnum_to_string(value);
func_fprintf(f, "%s", tmp);
g_free(tmp);
break;
}
case QTYPE_QSTRING: {
QString *value = qobject_to_qstring(obj);
func_fprintf(f, "%s", qstring_get_str(value));
break;
}
case QTYPE_QDICT: {
QDict *value = qobject_to_qdict(obj);
dump_qdict(func_fprintf, f, comp_indent, value);
break;
}
case QTYPE_QLIST: {
QList *value = qobject_to_qlist(obj);
dump_qlist(func_fprintf, f, comp_indent, value);
break;
}
case QTYPE_QBOOL: {
QBool *value = qobject_to_qbool(obj);
func_fprintf(f, "%s", qbool_get_bool(value) ? "true" : "false");
break;
}
default:
abort();
}
}
static void dump_qlist(fprintf_function func_fprintf, void *f, int indentation,
QList *list)
{
const QListEntry *entry;
int i = 0;
for (entry = qlist_first(list); entry; entry = qlist_next(entry), i++) {
QType type = qobject_type(entry->value);
bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
func_fprintf(f, "%*s[%i]:%c", indentation * 4, "", i,
composite ? '\n' : ' ');
dump_qobject(func_fprintf, f, indentation + 1, entry->value);
if (!composite) {
func_fprintf(f, "\n");
}
}
}
static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation,
QDict *dict)
{
const QDictEntry *entry;
for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) {
QType type = qobject_type(entry->value);
bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
char *key = g_malloc(strlen(entry->key) + 1);
int i;
/* replace dashes with spaces in key (variable) names */
for (i = 0; entry->key[i]; i++) {
key[i] = entry->key[i] == '-' ? ' ' : entry->key[i];
}
key[i] = 0;
func_fprintf(f, "%*s%s:%c", indentation * 4, "", key,
composite ? '\n' : ' ');
dump_qobject(func_fprintf, f, indentation + 1, entry->value);
if (!composite) {
func_fprintf(f, "\n");
}
g_free(key);
}
}
void bdrv_image_info_specific_dump(fprintf_function func_fprintf, void *f,
ImageInfoSpecific *info_spec)
{
QObject *obj, *data;
Visitor *v = qobject_output_visitor_new(&obj);
visit_type_ImageInfoSpecific(v, NULL, &info_spec, &error_abort);
visit_complete(v, &obj);
data = qdict_get(qobject_to_qdict(obj), "data");
dump_qobject(func_fprintf, f, 1, data);
qobject_decref(obj);
visit_free(v);
}
void bdrv_image_info_dump(fprintf_function func_fprintf, void *f,
ImageInfo *info)
{
char size_buf[128], dsize_buf[128];
if (!info->has_actual_size) {
snprintf(dsize_buf, sizeof(dsize_buf), "unavailable");
} else {
get_human_readable_size(dsize_buf, sizeof(dsize_buf),
info->actual_size);
}
get_human_readable_size(size_buf, sizeof(size_buf), info->virtual_size);
func_fprintf(f,
"image: %s\n"
"file format: %s\n"
"virtual size: %s (%" PRId64 " bytes)\n"
"disk size: %s\n",
info->filename, info->format, size_buf,
info->virtual_size,
dsize_buf);
if (info->has_encrypted && info->encrypted) {
func_fprintf(f, "encrypted: yes\n");
}
if (info->has_cluster_size) {
func_fprintf(f, "cluster_size: %" PRId64 "\n",
info->cluster_size);
}
if (info->has_dirty_flag && info->dirty_flag) {
func_fprintf(f, "cleanly shut down: no\n");
}
if (info->has_backing_filename) {
func_fprintf(f, "backing file: %s", info->backing_filename);
if (!info->has_full_backing_filename) {
func_fprintf(f, " (cannot determine actual path)");
} else if (strcmp(info->backing_filename,
info->full_backing_filename) != 0) {
func_fprintf(f, " (actual path: %s)", info->full_backing_filename);
}
func_fprintf(f, "\n");
if (info->has_backing_filename_format) {
func_fprintf(f, "backing file format: %s\n",
info->backing_filename_format);
}
}
if (info->has_snapshots) {
SnapshotInfoList *elem;
func_fprintf(f, "Snapshot list:\n");
bdrv_snapshot_dump(func_fprintf, f, NULL);
func_fprintf(f, "\n");
/* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but
* we convert to the block layer's native QEMUSnapshotInfo for now.
*/
for (elem = info->snapshots; elem; elem = elem->next) {
QEMUSnapshotInfo sn = {
.vm_state_size = elem->value->vm_state_size,
.date_sec = elem->value->date_sec,
.date_nsec = elem->value->date_nsec,
.vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +
elem->value->vm_clock_nsec,
};
pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);
pstrcpy(sn.name, sizeof(sn.name), elem->value->name);
bdrv_snapshot_dump(func_fprintf, f, &sn);
func_fprintf(f, "\n");
}
}
if (info->has_format_specific) {
func_fprintf(f, "Format specific information:\n");
bdrv_image_info_specific_dump(func_fprintf, f, info->format_specific);
}
}
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