This patch adds function bdrv_query_image_info(), which will retrieve image info in qmp object format. The implementation is based on the code moved from qemu-img.c, but uses block layer function to get snapshot info. Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
427 lines
14 KiB
C
427 lines
14 KiB
C
/*
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* Block layer qmp and info dump related functions
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "block/qapi.h"
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#include "block/block_int.h"
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#include "qmp-commands.h"
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/*
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* Returns 0 on success, with *p_list either set to describe snapshot
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* information, or NULL because there are no snapshots. Returns -errno on
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* error, with *p_list untouched.
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*/
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int bdrv_query_snapshot_info_list(BlockDriverState *bs,
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SnapshotInfoList **p_list,
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Error **errp)
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{
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int i, sn_count;
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QEMUSnapshotInfo *sn_tab = NULL;
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SnapshotInfoList *info_list, *cur_item = NULL, *head = NULL;
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SnapshotInfo *info;
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sn_count = bdrv_snapshot_list(bs, &sn_tab);
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if (sn_count < 0) {
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const char *dev = bdrv_get_device_name(bs);
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switch (sn_count) {
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case -ENOMEDIUM:
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error_setg(errp, "Device '%s' is not inserted", dev);
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break;
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case -ENOTSUP:
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error_setg(errp,
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"Device '%s' does not support internal snapshots",
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dev);
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break;
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default:
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error_setg_errno(errp, -sn_count,
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"Can't list snapshots of device '%s'", dev);
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break;
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}
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return sn_count;
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}
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for (i = 0; i < sn_count; i++) {
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info = g_new0(SnapshotInfo, 1);
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info->id = g_strdup(sn_tab[i].id_str);
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info->name = g_strdup(sn_tab[i].name);
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info->vm_state_size = sn_tab[i].vm_state_size;
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info->date_sec = sn_tab[i].date_sec;
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info->date_nsec = sn_tab[i].date_nsec;
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info->vm_clock_sec = sn_tab[i].vm_clock_nsec / 1000000000;
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info->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
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info_list = g_new0(SnapshotInfoList, 1);
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info_list->value = info;
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/* XXX: waiting for the qapi to support qemu-queue.h types */
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if (!cur_item) {
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head = cur_item = info_list;
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} else {
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cur_item->next = info_list;
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cur_item = info_list;
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}
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}
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g_free(sn_tab);
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*p_list = head;
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return 0;
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}
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/**
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* bdrv_query_image_info:
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* @bs: block device to examine
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* @p_info: location to store image information
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* @errp: location to store error information
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*
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* @p_info will be set only on success. On error, store error in @errp.
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*/
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void bdrv_query_image_info(BlockDriverState *bs,
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ImageInfo **p_info,
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Error **errp)
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{
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uint64_t total_sectors;
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const char *backing_filename;
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char backing_filename2[1024];
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BlockDriverInfo bdi;
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int ret;
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Error *err = NULL;
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ImageInfo *info = g_new0(ImageInfo, 1);
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bdrv_get_geometry(bs, &total_sectors);
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info->filename = g_strdup(bs->filename);
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info->format = g_strdup(bdrv_get_format_name(bs));
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info->virtual_size = total_sectors * 512;
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info->actual_size = bdrv_get_allocated_file_size(bs);
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info->has_actual_size = info->actual_size >= 0;
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if (bdrv_is_encrypted(bs)) {
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info->encrypted = true;
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info->has_encrypted = true;
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}
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if (bdrv_get_info(bs, &bdi) >= 0) {
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if (bdi.cluster_size != 0) {
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info->cluster_size = bdi.cluster_size;
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info->has_cluster_size = true;
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}
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info->dirty_flag = bdi.is_dirty;
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info->has_dirty_flag = true;
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}
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backing_filename = bs->backing_file;
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if (backing_filename[0] != '\0') {
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info->backing_filename = g_strdup(backing_filename);
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info->has_backing_filename = true;
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bdrv_get_full_backing_filename(bs, backing_filename2,
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sizeof(backing_filename2));
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if (strcmp(backing_filename, backing_filename2) != 0) {
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info->full_backing_filename =
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g_strdup(backing_filename2);
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info->has_full_backing_filename = true;
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}
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if (bs->backing_format[0]) {
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info->backing_filename_format = g_strdup(bs->backing_format);
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info->has_backing_filename_format = true;
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}
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}
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ret = bdrv_query_snapshot_info_list(bs, &info->snapshots, &err);
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switch (ret) {
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case 0:
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if (info->snapshots) {
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info->has_snapshots = true;
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}
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break;
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/* recoverable error */
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case -ENOMEDIUM:
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case -ENOTSUP:
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error_free(err);
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break;
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default:
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error_propagate(errp, err);
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qapi_free_ImageInfo(info);
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return;
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}
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*p_info = info;
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}
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BlockInfo *bdrv_query_info(BlockDriverState *bs)
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{
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BlockInfo *info = g_malloc0(sizeof(*info));
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info->device = g_strdup(bs->device_name);
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info->type = g_strdup("unknown");
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info->locked = bdrv_dev_is_medium_locked(bs);
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info->removable = bdrv_dev_has_removable_media(bs);
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if (bdrv_dev_has_removable_media(bs)) {
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info->has_tray_open = true;
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info->tray_open = bdrv_dev_is_tray_open(bs);
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}
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if (bdrv_iostatus_is_enabled(bs)) {
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info->has_io_status = true;
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info->io_status = bs->iostatus;
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}
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if (bs->dirty_bitmap) {
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info->has_dirty = true;
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info->dirty = g_malloc0(sizeof(*info->dirty));
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info->dirty->count = bdrv_get_dirty_count(bs) * BDRV_SECTOR_SIZE;
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info->dirty->granularity =
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((int64_t) BDRV_SECTOR_SIZE << hbitmap_granularity(bs->dirty_bitmap));
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}
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if (bs->drv) {
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info->has_inserted = true;
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info->inserted = g_malloc0(sizeof(*info->inserted));
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info->inserted->file = g_strdup(bs->filename);
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info->inserted->ro = bs->read_only;
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info->inserted->drv = g_strdup(bs->drv->format_name);
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info->inserted->encrypted = bs->encrypted;
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info->inserted->encryption_key_missing = bdrv_key_required(bs);
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if (bs->backing_file[0]) {
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info->inserted->has_backing_file = true;
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info->inserted->backing_file = g_strdup(bs->backing_file);
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}
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info->inserted->backing_file_depth = bdrv_get_backing_file_depth(bs);
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if (bs->io_limits_enabled) {
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info->inserted->bps =
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bs->io_limits.bps[BLOCK_IO_LIMIT_TOTAL];
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info->inserted->bps_rd =
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bs->io_limits.bps[BLOCK_IO_LIMIT_READ];
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info->inserted->bps_wr =
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bs->io_limits.bps[BLOCK_IO_LIMIT_WRITE];
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info->inserted->iops =
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bs->io_limits.iops[BLOCK_IO_LIMIT_TOTAL];
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info->inserted->iops_rd =
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bs->io_limits.iops[BLOCK_IO_LIMIT_READ];
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info->inserted->iops_wr =
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bs->io_limits.iops[BLOCK_IO_LIMIT_WRITE];
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}
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}
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return info;
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}
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BlockStats *bdrv_query_stats(const BlockDriverState *bs)
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{
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BlockStats *s;
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s = g_malloc0(sizeof(*s));
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if (bs->device_name[0]) {
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s->has_device = true;
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s->device = g_strdup(bs->device_name);
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}
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s->stats = g_malloc0(sizeof(*s->stats));
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s->stats->rd_bytes = bs->nr_bytes[BDRV_ACCT_READ];
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s->stats->wr_bytes = bs->nr_bytes[BDRV_ACCT_WRITE];
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s->stats->rd_operations = bs->nr_ops[BDRV_ACCT_READ];
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s->stats->wr_operations = bs->nr_ops[BDRV_ACCT_WRITE];
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s->stats->wr_highest_offset = bs->wr_highest_sector * BDRV_SECTOR_SIZE;
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s->stats->flush_operations = bs->nr_ops[BDRV_ACCT_FLUSH];
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s->stats->wr_total_time_ns = bs->total_time_ns[BDRV_ACCT_WRITE];
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s->stats->rd_total_time_ns = bs->total_time_ns[BDRV_ACCT_READ];
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s->stats->flush_total_time_ns = bs->total_time_ns[BDRV_ACCT_FLUSH];
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if (bs->file) {
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s->has_parent = true;
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s->parent = bdrv_query_stats(bs->file);
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}
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return s;
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}
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BlockInfoList *qmp_query_block(Error **errp)
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{
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BlockInfoList *head = NULL, **p_next = &head;
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BlockDriverState *bs = NULL;
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while ((bs = bdrv_next(bs))) {
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BlockInfoList *info = g_malloc0(sizeof(*info));
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info->value = bdrv_query_info(bs);
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*p_next = info;
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p_next = &info->next;
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}
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return head;
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}
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BlockStatsList *qmp_query_blockstats(Error **errp)
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{
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BlockStatsList *head = NULL, **p_next = &head;
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BlockDriverState *bs = NULL;
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while ((bs = bdrv_next(bs))) {
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BlockStatsList *info = g_malloc0(sizeof(*info));
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info->value = bdrv_query_stats(bs);
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*p_next = info;
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p_next = &info->next;
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}
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return head;
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}
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#define NB_SUFFIXES 4
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static char *get_human_readable_size(char *buf, int buf_size, int64_t size)
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{
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static const char suffixes[NB_SUFFIXES] = "KMGT";
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int64_t base;
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int i;
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if (size <= 999) {
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snprintf(buf, buf_size, "%" PRId64, size);
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} else {
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base = 1024;
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for (i = 0; i < NB_SUFFIXES; i++) {
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if (size < (10 * base)) {
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snprintf(buf, buf_size, "%0.1f%c",
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(double)size / base,
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suffixes[i]);
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break;
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} else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) {
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snprintf(buf, buf_size, "%" PRId64 "%c",
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((size + (base >> 1)) / base),
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suffixes[i]);
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break;
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}
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base = base * 1024;
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}
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}
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return buf;
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}
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void bdrv_snapshot_dump(fprintf_function func_fprintf, void *f,
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QEMUSnapshotInfo *sn)
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{
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char buf1[128], date_buf[128], clock_buf[128];
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struct tm tm;
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time_t ti;
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int64_t secs;
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if (!sn) {
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func_fprintf(f,
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"%-10s%-20s%7s%20s%15s",
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"ID", "TAG", "VM SIZE", "DATE", "VM CLOCK");
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} else {
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ti = sn->date_sec;
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localtime_r(&ti, &tm);
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strftime(date_buf, sizeof(date_buf),
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"%Y-%m-%d %H:%M:%S", &tm);
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secs = sn->vm_clock_nsec / 1000000000;
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snprintf(clock_buf, sizeof(clock_buf),
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"%02d:%02d:%02d.%03d",
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(int)(secs / 3600),
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(int)((secs / 60) % 60),
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(int)(secs % 60),
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(int)((sn->vm_clock_nsec / 1000000) % 1000));
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func_fprintf(f,
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"%-10s%-20s%7s%20s%15s",
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sn->id_str, sn->name,
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get_human_readable_size(buf1, sizeof(buf1),
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sn->vm_state_size),
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date_buf,
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clock_buf);
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}
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}
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void bdrv_image_info_dump(fprintf_function func_fprintf, void *f,
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ImageInfo *info)
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{
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char size_buf[128], dsize_buf[128];
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if (!info->has_actual_size) {
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snprintf(dsize_buf, sizeof(dsize_buf), "unavailable");
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} else {
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get_human_readable_size(dsize_buf, sizeof(dsize_buf),
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info->actual_size);
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}
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get_human_readable_size(size_buf, sizeof(size_buf), info->virtual_size);
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func_fprintf(f,
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"image: %s\n"
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"file format: %s\n"
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"virtual size: %s (%" PRId64 " bytes)\n"
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"disk size: %s\n",
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info->filename, info->format, size_buf,
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info->virtual_size,
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dsize_buf);
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if (info->has_encrypted && info->encrypted) {
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func_fprintf(f, "encrypted: yes\n");
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}
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if (info->has_cluster_size) {
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func_fprintf(f, "cluster_size: %" PRId64 "\n",
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info->cluster_size);
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}
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if (info->has_dirty_flag && info->dirty_flag) {
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func_fprintf(f, "cleanly shut down: no\n");
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}
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if (info->has_backing_filename) {
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func_fprintf(f, "backing file: %s", info->backing_filename);
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if (info->has_full_backing_filename) {
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func_fprintf(f, " (actual path: %s)", info->full_backing_filename);
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}
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func_fprintf(f, "\n");
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if (info->has_backing_filename_format) {
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func_fprintf(f, "backing file format: %s\n",
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info->backing_filename_format);
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}
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}
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if (info->has_snapshots) {
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SnapshotInfoList *elem;
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func_fprintf(f, "Snapshot list:\n");
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bdrv_snapshot_dump(func_fprintf, f, NULL);
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func_fprintf(f, "\n");
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/* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but
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* we convert to the block layer's native QEMUSnapshotInfo for now.
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*/
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for (elem = info->snapshots; elem; elem = elem->next) {
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QEMUSnapshotInfo sn = {
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.vm_state_size = elem->value->vm_state_size,
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.date_sec = elem->value->date_sec,
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.date_nsec = elem->value->date_nsec,
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.vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +
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elem->value->vm_clock_nsec,
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};
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pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);
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pstrcpy(sn.name, sizeof(sn.name), elem->value->name);
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bdrv_snapshot_dump(func_fprintf, f, &sn);
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func_fprintf(f, "\n");
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}
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}
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}
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