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[Qemu-devel] [PATCH V5 08/13] qmp: add interface query-images.
From: |
Wenchao Xia |
Subject: |
[Qemu-devel] [PATCH V5 08/13] qmp: add interface query-images. |
Date: |
Thu, 24 Jan 2013 10:57:58 +0800 |
This mirror function will return all image info including
snapshots. Now Qemu have both query-images and query-block
interfaces.
Signed-off-by: Wenchao Xia <address@hidden>
---
block.c | 32 ++++++++++++++++++++++
qapi-schema.json | 27 +++++++++++++++++++
qmp-commands.hx | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 135 insertions(+), 0 deletions(-)
diff --git a/block.c b/block.c
index 082237b..02c74dc 100644
--- a/block.c
+++ b/block.c
@@ -2975,6 +2975,38 @@ ImageInfo *bdrv_query_image_info(BlockDriverState *bs,
Error **errp)
return info;
}
+DeviceImageInfoList *qmp_query_images(Error **errp)
+{
+ DeviceImageInfoList *head = NULL, **p_next = &head;
+ BlockDriverState *bs;
+ Error *err = NULL;
+
+ QTAILQ_FOREACH(bs, &bdrv_states, list) {
+ DeviceImageInfo *dii = g_malloc0(sizeof(*dii));
+ DeviceImageInfoList *diil = g_malloc0(sizeof(*diil));
+ diil->value = dii;
+ *p_next = diil;
+ p_next = &diil->next;
+
+ dii->device = g_strdup(bs->device_name);
+ if (!bdrv_is_inserted(bs)) {
+ dii->has_image = false;
+ continue;
+ }
+ dii->has_image = true;
+ dii->image = bdrv_query_image_info(bs, &err);
+ if (error_is_set(&err)) {
+ goto err;
+ }
+ }
+
+ return head;
+
+ err:
+ qapi_free_DeviceImageInfoList(head);
+ return NULL;
+}
+
BlockInfo *bdrv_query_block_info(BlockDriverState *bs)
{
BlockInfo *info = g_malloc0(sizeof(*info));
diff --git a/qapi-schema.json b/qapi-schema.json
index 6d7252b..7881a9a 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -245,6 +245,22 @@
'*backing-filename-format': 'str', '*snapshots': ['SnapshotInfo'] }
}
##
+# @DeviceImageInfo:
+#
+# Information about an image used by QEMU block device
+#
+# @device: name of the block device
+#
+# @image: #optional info of the image used.
+#
+# Since: 1.4
+#
+##
+
+{ 'type': 'DeviceImageInfo',
+ 'data': {'device': 'str', '*image': 'ImageInfo' } }
+
+##
# @StatusInfo:
#
# Information about VCPU run state
@@ -720,6 +736,17 @@
{ 'command': 'query-block', 'returns': ['BlockInfo'] }
##
+# @query-images:
+#
+# Get a list of DeviceImageInfo for all virtual block devices.
+#
+# Returns: a list of @DeviceImageInfo describing each virtual block device
+#
+# Since: 1.4
+##
+{ 'command': 'query-images', 'returns': ['DeviceImageInfo'] }
+
+##
# @BlockDeviceStats:
#
# Statistics of a virtual block device or a block backing device.
diff --git a/qmp-commands.hx b/qmp-commands.hx
index cbf1280..9bd6288 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -1668,6 +1668,82 @@ EQMP
},
SQMP
+query-images
+-----------
+
+Show the block devices' images.
+
+Each block image information is stored in a json-object and the returned value
+is a json-array of all devices' images.
+
+Each json-object contain the following:
+
+- "device": device name (json-string)
+- "image": related image information, it is a optional json-object containing
the following:
+ - "filename": image file name (json-string)
+ - "format": image format (json-string)
+ - "virtual-size": maximum capacity in bytes of the image (json-int)
+ - "dirty-flag": true if image is not cleanly closed (json-bool,
optional)
+ - "actual-size": actual size on disk in bytes of the image (json-int,
optional)
+ - "cluster-size": size of a cluster in bytes (json-int, optional)
+ - "encrypted": true if the image is encrypted (json-bool, optional)
+ - "backing_file": backing file name (json-string, optional)
+ - "full-backing-filename": full path of the backing file
(json-string, optional)
+ - "backing-filename-format": the format of the backing file
(json-string, optional)
+ - "snapshots": the internal snapshot info, it is an optional list of
json-object
+ containing the following:
+ - "id": unique snapshot id (json-string)
+ - "name": internal snapshot name (json-string)
+ - "vm-state-size": size of the VM state in bytes (json-int)
+ - "date-sec": UTC date of the snapshot in seconds (json-int)
+ - "date-nsec": fractional part in nano seconds to be used with
date-sec(json-int)
+ - "vm-clock-sec": VM clock relative to boot in seconds (json-int)
+ - "vm-clock-nsec": fractional part in nano seconds to be used
with vm-clock-sec (json-int)
+
+Example:
+
+-> { "execute": "query-images" }
+<- {
+ "return":[
+ {
+ "device":"ide0-hd0",
+ "image":{
+ "filename":"disks/test0.img",
+ "format":"qcow2",
+ "virtual-size":1024000
+ }
+ },
+ {
+ "device":"ide0-hd1",
+ "image":{
+ "filename":"disks/test1.img",
+ "format":"qcow2",
+ "virtual-size":2048000,
+ "snapshots":[
+ {
+ "id": "1",
+ "name": "snapshot1",
+ "vm-state-size": 0,
+ "date-sec": 10000200,
+ "date-nsec": 12,
+ "vm-clock-sec": 206,
+ "vm-clock-nsec": 30
+ }
+ ]
+ }
+ }
+ ]
+ }
+
+EQMP
+
+ {
+ .name = "query-images",
+ .args_type = "",
+ .mhandler.cmd_new = qmp_marshal_input_query_images,
+ },
+
+SQMP
query-blockstats
----------------
--
1.7.1
- Re: [Qemu-devel] [PATCH V5 03/13] block: add bdrv_can_read_snapshot() function, (continued)
- [Qemu-devel] [PATCH V5 04/13] block: add snapshot info query function bdrv_query_snapshot_infolist(), Wenchao Xia, 2013/01/23
- [Qemu-devel] [PATCH V5 05/13] block: add image info query function bdrv_query_image_info(), Wenchao Xia, 2013/01/23
- [Qemu-devel] [PATCH V5 06/13] qemu-img: switch image retrieving function, Wenchao Xia, 2013/01/23
- [Qemu-devel] [PATCH V5 07/13] block: rename bdrv_query_info to bdrv_query_block_info, Wenchao Xia, 2013/01/23
- [Qemu-devel] [PATCH V5 09/13] block: export function bdrv_find_snapshot(), Wenchao Xia, 2013/01/23
- [Qemu-devel] [PATCH V5 11/13] hmp: add function hmp_info_snapshots(), Wenchao Xia, 2013/01/23
- [Qemu-devel] [PATCH V5 12/13] hmp: switch snapshot info function to qmp based one, Wenchao Xia, 2013/01/23
- [Qemu-devel] [PATCH V5 13/13] hmp: show snapshots on single block device, Wenchao Xia, 2013/01/23
- [Qemu-devel] [PATCH V5 08/13] qmp: add interface query-images.,
Wenchao Xia <=
- [Qemu-devel] [PATCH V5 10/13] qmp: add interface query-snapshots, Wenchao Xia, 2013/01/23