Add qemu 2.4.0
[kvmfornfv.git] / qemu / block / qapi.c
diff --git a/qemu/block/qapi.c b/qemu/block/qapi.c
new file mode 100644 (file)
index 0000000..2ce5097
--- /dev/null
@@ -0,0 +1,666 @@
+/*
+ * 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 "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/qmp-output-visitor.h"
+#include "qapi/qmp/types.h"
+#include "sysemu/block-backend.h"
+
+BlockDeviceInfo *bdrv_block_device_info(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 = bdrv_key_required(bs);
+
+    info->cache = g_new(BlockdevCacheInfo, 1);
+    *info->cache = (BlockdevCacheInfo) {
+        .writeback      = bdrv_enable_write_cache(bs),
+        .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->backing_file_depth = bdrv_get_backing_file_depth(bs);
+    info->detect_zeroes = bs->detect_zeroes;
+
+    if (bs->io_limits_enabled) {
+        ThrottleConfig cfg;
+
+        throttle_group_get_config(bs, &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_iops_size = cfg.op_size;
+        info->iops_size = cfg.op_size;
+
+        info->has_group = true;
+        info->group = g_strdup(throttle_group_get_name(bs));
+    }
+
+    info->write_threshold = bdrv_write_threshold_get(bs);
+
+    bs0 = bs;
+    p_image_info = &info->image;
+    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_hd) {
+            bs0 = bs0->backing_hd;
+            (*p_image_info)->has_backing_image = true;
+            p_image_info = &((*p_image_info)->backing_image);
+        } else {
+            break;
+        }
+    }
+
+    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;
+
+    size = bdrv_getlength(bs);
+    if (size < 0) {
+        error_setg_errno(errp, -size, "Can't get size of device '%s'",
+                         bdrv_get_device_name(bs));
+        return;
+    }
+
+    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) {
+            error_propagate(errp, err);
+            qapi_free_ImageInfo(info);
+            g_free(backing_filename2);
+            return;
+        }
+
+        if (strcmp(backing_filename, backing_filename2) != 0) {
+            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);
+        return;
+    }
+
+    *p_info = info;
+}
+
+/* @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);
+    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);
+
+    if (blk_dev_has_removable_media(blk)) {
+        info->has_tray_open = true;
+        info->tray_open = blk_dev_is_tray_open(blk);
+    }
+
+    if (bdrv_iostatus_is_enabled(bs)) {
+        info->has_io_status = true;
+        info->io_status = bs->iostatus;
+    }
+
+    if (!QLIST_EMPTY(&bs->dirty_bitmaps)) {
+        info->has_dirty_bitmaps = true;
+        info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
+    }
+
+    if (bs->drv) {
+        info->has_inserted = true;
+        info->inserted = bdrv_block_device_info(bs, errp);
+        if (info->inserted == NULL) {
+            goto err;
+        }
+    }
+
+    *p_info = info;
+    return;
+
+ err:
+    qapi_free_BlockInfo(info);
+}
+
+static BlockStats *bdrv_query_stats(const BlockDriverState *bs,
+                                    bool query_backing)
+{
+    BlockStats *s;
+
+    s = g_malloc0(sizeof(*s));
+
+    if (bdrv_get_device_name(bs)[0]) {
+        s->has_device = true;
+        s->device = g_strdup(bdrv_get_device_name(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 = g_malloc0(sizeof(*s->stats));
+    s->stats->rd_bytes = bs->stats.nr_bytes[BLOCK_ACCT_READ];
+    s->stats->wr_bytes = bs->stats.nr_bytes[BLOCK_ACCT_WRITE];
+    s->stats->rd_operations = bs->stats.nr_ops[BLOCK_ACCT_READ];
+    s->stats->wr_operations = bs->stats.nr_ops[BLOCK_ACCT_WRITE];
+    s->stats->rd_merged = bs->stats.merged[BLOCK_ACCT_READ];
+    s->stats->wr_merged = bs->stats.merged[BLOCK_ACCT_WRITE];
+    s->stats->wr_highest_offset =
+        bs->stats.wr_highest_sector * BDRV_SECTOR_SIZE;
+    s->stats->flush_operations = bs->stats.nr_ops[BLOCK_ACCT_FLUSH];
+    s->stats->wr_total_time_ns = bs->stats.total_time_ns[BLOCK_ACCT_WRITE];
+    s->stats->rd_total_time_ns = bs->stats.total_time_ns[BLOCK_ACCT_READ];
+    s->stats->flush_total_time_ns = bs->stats.total_time_ns[BLOCK_ACCT_FLUSH];
+
+    if (bs->file) {
+        s->has_parent = true;
+        s->parent = bdrv_query_stats(bs->file, query_backing);
+    }
+
+    if (query_backing && bs->backing_hd) {
+        s->has_backing = true;
+        s->backing = bdrv_query_stats(bs->backing_hd, query_backing);
+    }
+
+    return s;
+}
+
+BlockInfoList *qmp_query_block(Error **errp)
+{
+    BlockInfoList *head = NULL, **p_next = &head;
+    BlockBackend *blk;
+    Error *local_err = NULL;
+
+    for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
+        BlockInfoList *info = g_malloc0(sizeof(*info));
+        bdrv_query_info(blk, &info->value, &local_err);
+        if (local_err) {
+            error_propagate(errp, local_err);
+            goto err;
+        }
+
+        *p_next = info;
+        p_next = &info->next;
+    }
+
+    return head;
+
+ err:
+    qapi_free_BlockInfoList(head);
+    return NULL;
+}
+
+BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
+                                     bool query_nodes,
+                                     Error **errp)
+{
+    BlockStatsList *head = NULL, **p_next = &head;
+    BlockDriverState *bs = NULL;
+
+    /* Just to be safe if query_nodes is not always initialized */
+    query_nodes = has_query_nodes && query_nodes;
+
+    while ((bs = query_nodes ? bdrv_next_node(bs) : bdrv_next(bs))) {
+        BlockStatsList *info = g_malloc0(sizeof(*info));
+        AioContext *ctx = bdrv_get_aio_context(bs);
+
+        aio_context_acquire(ctx);
+        info->value = bdrv_query_stats(bs, !query_nodes);
+        aio_context_release(ctx);
+
+        *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_QINT: {
+            QInt *value = qobject_to_qint(obj);
+            func_fprintf(f, "%" PRId64, qint_get_int(value));
+            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_QFLOAT: {
+            QFloat *value = qobject_to_qfloat(obj);
+            func_fprintf(f, "%g", qfloat_get_double(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_code type = qobject_type(entry->value);
+        bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
+        const char *format = composite ? "%*s[%i]:\n" : "%*s[%i]: ";
+
+        func_fprintf(f, format, indentation * 4, "", i);
+        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_code type = qobject_type(entry->value);
+        bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
+        const char *format = composite ? "%*s%s:\n" : "%*s%s: ";
+        char key[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, format, indentation * 4, "", key);
+        dump_qobject(func_fprintf, f, indentation + 1, entry->value);
+        if (!composite) {
+            func_fprintf(f, "\n");
+        }
+    }
+}
+
+void bdrv_image_info_specific_dump(fprintf_function func_fprintf, void *f,
+                                   ImageInfoSpecific *info_spec)
+{
+    QmpOutputVisitor *ov = qmp_output_visitor_new();
+    QObject *obj, *data;
+
+    visit_type_ImageInfoSpecific(qmp_output_get_visitor(ov), &info_spec, NULL,
+                                 &error_abort);
+    obj = qmp_output_get_qobject(ov);
+    assert(qobject_type(obj) == QTYPE_QDICT);
+    data = qdict_get(qobject_to_qdict(obj), "data");
+    dump_qobject(func_fprintf, f, 1, data);
+    qmp_output_visitor_cleanup(ov);
+}
+
+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, " (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);
+    }
+}