From: Benoît Canet <ben...@irqsave.net>
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 <ben...@irqsave.net>
Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
Makefile | 3 +-
qemu-img-cmds.hx | 4 +-
qemu-img.c | 236 ++++++++++++++++++++++++++++++++++++++++++++----------
qemu-img.texi | 5 +-
4 files changed, 199 insertions(+), 49 deletions(-)
diff --git a/Makefile b/Makefile
index 1cd5bc8..971e92f 100644
--- a/Makefile
+++ b/Makefile
@@ -157,7 +157,8 @@ tools-obj-y = $(oslib-obj-y) $(trace-obj-y) qemu-tool.o
qemu-timer.o \
iohandler.o cutils.o iov.o async.o
tools-obj-$(CONFIG_POSIX) += compatfd.o
-qemu-img$(EXESUF): qemu-img.o $(tools-obj-y) $(block-obj-y)
+qemu-img$(EXESUF): qemu-img.o $(tools-obj-y) $(block-obj-y) $(qapi-obj-y) \
+ qapi-visit.o qapi-types.o
qemu-nbd$(EXESUF): qemu-nbd.o $(tools-obj-y) $(block-obj-y)
qemu-io$(EXESUF): qemu-io.o cmd.o $(tools-obj-y) $(block-obj-y)
diff --git a/qemu-img-cmds.hx b/qemu-img-cmds.hx
index 39419a0..0ef82e9 100644
--- a/qemu-img-cmds.hx
+++ b/qemu-img-cmds.hx
@@ -34,9 +34,9 @@ STEXI
ETEXI
DEF("info", img_info,
- "info [-f fmt] filename")
+ "info [-f fmt] [--output=ofmt] filename")
STEXI
-@item info [-f @var{fmt}] @var{filename}
+@item info [-f @var{fmt}] [--output=@var{ofmt}] @var{filename}
ETEXI
DEF("snapshot", img_snapshot,
diff --git a/qemu-img.c b/qemu-img.c
index b41e670..30e33c7 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -21,12 +21,16 @@
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
+#include "qapi-visit.h"
+#include "qapi/qmp-output-visitor.h"
+#include "qjson.h"
#include "qemu-common.h"
#include "qemu-option.h"
#include "qemu-error.h"
#include "osdep.h"
#include "sysemu.h"
#include "block_int.h"
+#include <getopt.h>
#include <stdio.h>
#ifdef _WIN32
@@ -84,6 +88,7 @@ static void help(void)
" '-p' show progress of command (only certain commands)\n"
" '-S' indicates the consecutive number of bytes that must contain
only zeros\n"
" for qemu-img to create a sparse image during conversion\n"
+ " '--output' takes the format in which the output must be done
(human or json)\n"
"\n"
"Parameters to check subcommand:\n"
" '-r' tries to repair any inconsistencies that are found during
the check.\n"
@@ -1102,21 +1107,174 @@ static void dump_snapshots(BlockDriverState *bs)
g_free(sn_tab);
}
-static int img_info(int argc, char **argv)
+static void collect_snapshots(BlockDriverState *bs , ImageInfo *info)
+{
+ int i, sn_count;
+ QEMUSnapshotInfo *sn_tab = NULL;
+ SnapshotInfoList *info_list, *cur_item = NULL;
+ sn_count = bdrv_snapshot_list(bs, &sn_tab);
+
+ for (i = 0; i < sn_count; i++) {
+ info->has_snapshots = true;
+ info_list = g_new0(SnapshotInfoList, 1);
+
+ info_list->value = g_new0(SnapshotInfo, 1);
+ info_list->value->id = g_strdup(sn_tab[i].id_str);
+ info_list->value->name = g_strdup(sn_tab[i].name);
+ info_list->value->vm_state_size = sn_tab[i].vm_state_size;
+ info_list->value->date_sec = sn_tab[i].date_sec;
+ info_list->value->date_nsec = sn_tab[i].date_nsec;
+ info_list->value->vm_clock_sec = sn_tab[i].vm_clock_nsec / 1000000000;
+ info_list->value->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
+
+ /* XXX: waiting for the qapi to support qemu-queue.h types */
+ if (!cur_item) {
+ info->snapshots = cur_item = info_list;
+ } else {
+ cur_item->next = info_list;
+ cur_item = info_list;
+ }
+
+ }
+
+ g_free(sn_tab);
+}
+
+static void dump_json_image_info(ImageInfo *info)
+{
+ Error *errp = NULL;
+ QString *str;
+ QmpOutputVisitor *ov = qmp_output_visitor_new();
+ QObject *obj;
+ visit_type_ImageInfo(qmp_output_get_visitor(ov),
+ &info, NULL, &errp);
+ obj = qmp_output_get_qobject(ov);
+ str = qobject_to_json_pretty(obj);
+ assert(str != NULL);
+ printf("%s\n", qstring_get_str(str));
+ qobject_decref(obj);
+ qmp_output_visitor_cleanup(ov);
+ QDECREF(str);
+}
+
+static void collect_image_info(BlockDriverState *bs,
+ ImageInfo *info,
+ const char *filename,
+ const char *fmt)
{
- int c;
- const char *filename, *fmt;
- BlockDriverState *bs;
- char size_buf[128], dsize_buf[128];
uint64_t total_sectors;
- int64_t allocated_size;
char backing_filename[1024];
char backing_filename2[1024];
BlockDriverInfo bdi;
+ bdrv_get_geometry(bs, &total_sectors);
+
+ info->filename = g_strdup(filename);
+ info->format = g_strdup(bdrv_get_format_name(bs));
+ info->virtual_size = total_sectors * 512;
+ 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;
+ }
+ bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
+ if (backing_filename[0] != '\0') {
+ info->backing_filename = g_strdup(backing_filename);
+ info->has_backing_filename = true;
+ bdrv_get_full_backing_filename(bs, backing_filename2,
+ sizeof(backing_filename2));
+
+ 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;
+ }
+ }
+}
+
+static void dump_human_image_info(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);
+ printf("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) {
+ printf("encrypted: yes\n");
+ }
+
+ if (info->has_cluster_size) {
+ printf("cluster_size: %" PRId64 "\n", info->cluster_size);
+ }
+
+ if (info->has_dirty_flag && info->dirty_flag) {
+ printf("cleanly shut down: no\n");
+ }
+
+ if (info->has_backing_filename) {
+ printf("backing file: %s", info->backing_filename);
+ if (info->has_full_backing_filename) {
+ printf(" (actual path: %s)", info->full_backing_filename);
+ }
+ putchar('\n');
+ if (info->has_backing_filename_format) {
+ printf("backing file format: %s\n", info->backing_filename_format);
+ }
+ }
+}
+
+enum {OPTION_OUTPUT = 256};
+
+typedef enum OutputFormat {
+ OFORMAT_JSON,
+ OFORMAT_HUMAN,
+} OutputFormat;
+
+static int img_info(int argc, char **argv)
+{
+ int c;
+ OutputFormat output_format = OFORMAT_HUMAN;
+ const char *filename, *fmt, *output;
+ BlockDriverState *bs;
+ ImageInfo *info;
+
fmt = NULL;
+ output = NULL;
for(;;) {
- c = getopt(argc, argv, "f:h");
+ int option_index = 0;
+ static const struct option long_options[] = {
+ {"help", no_argument, 0, 'h'},
+ {"format", required_argument, 0, 'f'},
+ {"output", required_argument, 0, OPTION_OUTPUT},
+ {0, 0, 0, 0}
+ };
+ c = getopt_long(argc, argv, "f:h",
+ long_options, &option_index);
if (c == -1) {
break;
}
@@ -1128,6 +1286,9 @@ static int img_info(int argc, char **argv)
case 'f':
fmt = optarg;
break;
+ case OPTION_OUTPUT:
+ output = optarg;
+ break;
}
}
if (optind >= argc) {
@@ -1135,48 +1296,35 @@ static int img_info(int argc, char **argv)
}
filename = argv[optind++];
+ if (output && !strcmp(output, "json")) {
+ output_format = OFORMAT_JSON;
+ } else if (output && !strcmp(output, "human")) {
+ output_format = OFORMAT_HUMAN;
+ } else if (output) {
+ error_report("--output must be used with human or json as argument.");
+ return 1;
+ }
+
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING);
if (!bs) {
return 1;
}
- bdrv_get_geometry(bs, &total_sectors);
- get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512);
- allocated_size = bdrv_get_allocated_file_size(bs);
- if (allocated_size < 0) {
- snprintf(dsize_buf, sizeof(dsize_buf), "unavailable");
- } else {
- get_human_readable_size(dsize_buf, sizeof(dsize_buf),
- allocated_size);
- }
- printf("image: %s\n"
- "file format: %s\n"
- "virtual size: %s (%" PRId64 " bytes)\n"
- "disk size: %s\n",
- filename, bdrv_get_format_name(bs), size_buf,
- (total_sectors * 512),
- dsize_buf);
- if (bdrv_is_encrypted(bs)) {
- printf("encrypted: yes\n");
- }
- if (bdrv_get_info(bs, &bdi) >= 0) {
- if (bdi.cluster_size != 0) {
- printf("cluster_size: %d\n", bdi.cluster_size);
- }
- if (bdi.is_dirty) {
- printf("cleanly shut down: no\n");
- }
- }
- bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
- if (backing_filename[0] != '\0') {
- bdrv_get_full_backing_filename(bs, backing_filename2,
- sizeof(backing_filename2));
- printf("backing file: %s", backing_filename);
- if (strcmp(backing_filename, backing_filename2) != 0) {
- printf(" (actual path: %s)", backing_filename2);
- }
- putchar('\n');
+
+ info = g_new0(ImageInfo, 1);
+ collect_image_info(bs, info, filename, fmt);
+
+ switch (output_format) {
+ case OFORMAT_HUMAN:
+ dump_human_image_info(info);
+ dump_snapshots(bs);
+ break;
+ case OFORMAT_JSON:
+ collect_snapshots(bs, info);
+ dump_json_image_info(info);
+ break;
}
- dump_snapshots(bs);
+
+ qapi_free_ImageInfo(info);
bdrv_delete(bs);
return 0;
}
diff --git a/qemu-img.texi b/qemu-img.texi
index 6b42e35..ca85891 100644
--- a/qemu-img.texi
+++ b/qemu-img.texi
@@ -129,12 +129,13 @@ created as a copy on write image of the specified base
image; the
@var{backing_file} should have the same content as the input's base image,
however the path, image format, etc may differ.
-@item info [-f @var{fmt}] @var{filename}
+@item info [-f @var{fmt}] [--output=@var{ofmt}] @var{filename}
Give information about the disk image @var{filename}. Use it in
particular to know the size reserved on disk which can be different
from the displayed size. If VM snapshots are stored in the disk image,
-they are displayed too.
+they are displayed too. The command can output in the format @var{ofmt}
+which is either @code{human} or @code{json}.
@item snapshot [-l | -a @var{snapshot} | -c @var{snapshot} | -d @var{snapshot}
] @var{filename}
--
1.7.6.5
