qemu-img: Add json output option to the info command.
This option --output=[human|json] make qemu-img info output on
human or JSON representation at the choice of the user.
example:
{
"snapshots": [
{
"vm-clock-nsec": 637102488,
"name": "vm-20120821145509",
"date-sec": 1345553709,
"date-nsec": 220289000,
"vm-clock-sec": 20,
"id": "1",
"vm-state-size": 96522745
},
{
"vm-clock-nsec": 28210866,
"name": "vm-20120821154059",
"date-sec": 1345556459,
"date-nsec": 171392000,
"vm-clock-sec": 46,
"id": "2",
"vm-state-size": 101208714
}
],
"virtual-size": 1073741824,
"filename": "snap.qcow2",
"cluster-size": 65536,
"format": "qcow2",
"actual-size": 985587712,
"dirty-flag": false
}
Signed-off-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Benoît Canet
Kevin Wolf
parent
c249ee6825
commit
c054b3fd78
3
Makefile
3
Makefile
@ -157,7 +157,8 @@ tools-obj-y = $(oslib-obj-y) $(trace-obj-y) qemu-tool.o qemu-timer.o \
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iohandler.o cutils.o iov.o async.o
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tools-obj-$(CONFIG_POSIX) += compatfd.o
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qemu-img$(EXESUF): qemu-img.o $(tools-obj-y) $(block-obj-y)
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qemu-img$(EXESUF): qemu-img.o $(tools-obj-y) $(block-obj-y) $(qapi-obj-y) \
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qapi-visit.o qapi-types.o
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qemu-nbd$(EXESUF): qemu-nbd.o $(tools-obj-y) $(block-obj-y)
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qemu-io$(EXESUF): qemu-io.o cmd.o $(tools-obj-y) $(block-obj-y)
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@ -34,9 +34,9 @@ STEXI
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ETEXI
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DEF("info", img_info,
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"info [-f fmt] filename")
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"info [-f fmt] [--output=ofmt] filename")
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STEXI
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@item info [-f @var{fmt}] @var{filename}
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@item info [-f @var{fmt}] [--output=@var{ofmt}] @var{filename}
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ETEXI
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DEF("snapshot", img_snapshot,
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236
qemu-img.c
236
qemu-img.c
@ -21,12 +21,16 @@
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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 "qapi-visit.h"
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#include "qapi/qmp-output-visitor.h"
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#include "qjson.h"
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#include "qemu-common.h"
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#include "qemu-option.h"
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#include "qemu-error.h"
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#include "osdep.h"
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#include "sysemu.h"
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#include "block_int.h"
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#include <getopt.h>
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#include <stdio.h>
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#ifdef _WIN32
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@ -84,6 +88,7 @@ static void help(void)
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" '-p' show progress of command (only certain commands)\n"
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" '-S' indicates the consecutive number of bytes that must contain only zeros\n"
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" for qemu-img to create a sparse image during conversion\n"
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" '--output' takes the format in which the output must be done (human or json)\n"
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"\n"
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"Parameters to check subcommand:\n"
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" '-r' tries to repair any inconsistencies that are found during the check.\n"
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@ -1102,21 +1107,174 @@ static void dump_snapshots(BlockDriverState *bs)
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g_free(sn_tab);
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}
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static int img_info(int argc, char **argv)
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static void collect_snapshots(BlockDriverState *bs , ImageInfo *info)
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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;
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sn_count = bdrv_snapshot_list(bs, &sn_tab);
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for (i = 0; i < sn_count; i++) {
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info->has_snapshots = true;
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info_list = g_new0(SnapshotInfoList, 1);
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info_list->value = g_new0(SnapshotInfo, 1);
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info_list->value->id = g_strdup(sn_tab[i].id_str);
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info_list->value->name = g_strdup(sn_tab[i].name);
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info_list->value->vm_state_size = sn_tab[i].vm_state_size;
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info_list->value->date_sec = sn_tab[i].date_sec;
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info_list->value->date_nsec = sn_tab[i].date_nsec;
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info_list->value->vm_clock_sec = sn_tab[i].vm_clock_nsec / 1000000000;
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info_list->value->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
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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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info->snapshots = 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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}
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static void dump_json_image_info(ImageInfo *info)
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{
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Error *errp = NULL;
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QString *str;
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QmpOutputVisitor *ov = qmp_output_visitor_new();
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QObject *obj;
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visit_type_ImageInfo(qmp_output_get_visitor(ov),
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&info, NULL, &errp);
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obj = qmp_output_get_qobject(ov);
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str = qobject_to_json_pretty(obj);
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assert(str != NULL);
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printf("%s\n", qstring_get_str(str));
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qobject_decref(obj);
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qmp_output_visitor_cleanup(ov);
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QDECREF(str);
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}
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static void collect_image_info(BlockDriverState *bs,
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ImageInfo *info,
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const char *filename,
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const char *fmt)
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{
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int c;
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const char *filename, *fmt;
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BlockDriverState *bs;
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char size_buf[128], dsize_buf[128];
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uint64_t total_sectors;
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int64_t allocated_size;
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char backing_filename[1024];
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char backing_filename2[1024];
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BlockDriverInfo bdi;
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bdrv_get_geometry(bs, &total_sectors);
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info->filename = g_strdup(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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bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
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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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}
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static void dump_human_image_info(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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printf("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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printf("encrypted: yes\n");
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}
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if (info->has_cluster_size) {
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printf("cluster_size: %" PRId64 "\n", info->cluster_size);
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}
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if (info->has_dirty_flag && info->dirty_flag) {
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printf("cleanly shut down: no\n");
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}
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if (info->has_backing_filename) {
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printf("backing file: %s", info->backing_filename);
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if (info->has_full_backing_filename) {
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printf(" (actual path: %s)", info->full_backing_filename);
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}
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putchar('\n');
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if (info->has_backing_filename_format) {
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printf("backing file format: %s\n", info->backing_filename_format);
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}
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}
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}
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enum {OPTION_OUTPUT = 256};
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typedef enum OutputFormat {
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OFORMAT_JSON,
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OFORMAT_HUMAN,
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} OutputFormat;
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static int img_info(int argc, char **argv)
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{
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int c;
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OutputFormat output_format = OFORMAT_HUMAN;
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const char *filename, *fmt, *output;
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BlockDriverState *bs;
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ImageInfo *info;
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fmt = NULL;
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output = NULL;
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for(;;) {
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c = getopt(argc, argv, "f:h");
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int option_index = 0;
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static const struct option long_options[] = {
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{"help", no_argument, 0, 'h'},
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{"format", required_argument, 0, 'f'},
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{"output", required_argument, 0, OPTION_OUTPUT},
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{0, 0, 0, 0}
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};
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c = getopt_long(argc, argv, "f:h",
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long_options, &option_index);
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if (c == -1) {
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break;
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}
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@ -1128,6 +1286,9 @@ static int img_info(int argc, char **argv)
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case 'f':
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fmt = optarg;
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break;
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case OPTION_OUTPUT:
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output = optarg;
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break;
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}
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}
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if (optind >= argc) {
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@ -1135,48 +1296,35 @@ static int img_info(int argc, char **argv)
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}
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filename = argv[optind++];
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if (output && !strcmp(output, "json")) {
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output_format = OFORMAT_JSON;
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} else if (output && !strcmp(output, "human")) {
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output_format = OFORMAT_HUMAN;
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} else if (output) {
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error_report("--output must be used with human or json as argument.");
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return 1;
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}
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bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING);
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if (!bs) {
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return 1;
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}
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bdrv_get_geometry(bs, &total_sectors);
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get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512);
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allocated_size = bdrv_get_allocated_file_size(bs);
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if (allocated_size < 0) {
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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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allocated_size);
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}
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printf("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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filename, bdrv_get_format_name(bs), size_buf,
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(total_sectors * 512),
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dsize_buf);
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if (bdrv_is_encrypted(bs)) {
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printf("encrypted: yes\n");
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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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printf("cluster_size: %d\n", bdi.cluster_size);
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}
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if (bdi.is_dirty) {
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printf("cleanly shut down: no\n");
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}
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}
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bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
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if (backing_filename[0] != '\0') {
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bdrv_get_full_backing_filename(bs, backing_filename2,
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sizeof(backing_filename2));
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printf("backing file: %s", backing_filename);
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if (strcmp(backing_filename, backing_filename2) != 0) {
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printf(" (actual path: %s)", backing_filename2);
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}
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putchar('\n');
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}
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info = g_new0(ImageInfo, 1);
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collect_image_info(bs, info, filename, fmt);
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switch (output_format) {
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case OFORMAT_HUMAN:
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dump_human_image_info(info);
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dump_snapshots(bs);
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break;
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case OFORMAT_JSON:
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collect_snapshots(bs, info);
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dump_json_image_info(info);
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break;
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}
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qapi_free_ImageInfo(info);
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bdrv_delete(bs);
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return 0;
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}
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@ -129,12 +129,13 @@ created as a copy on write image of the specified base image; the
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@var{backing_file} should have the same content as the input's base image,
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however the path, image format, etc may differ.
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@item info [-f @var{fmt}] @var{filename}
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@item info [-f @var{fmt}] [--output=@var{ofmt}] @var{filename}
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Give information about the disk image @var{filename}. Use it in
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particular to know the size reserved on disk which can be different
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from the displayed size. If VM snapshots are stored in the disk image,
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they are displayed too.
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they are displayed too. The command can output in the format @var{ofmt}
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which is either @code{human} or @code{json}.
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@item snapshot [-l | -a @var{snapshot} | -c @var{snapshot} | -d @var{snapshot} ] @var{filename}
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