[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH V12 10/18] qmp: add interface query-snapshots
From: |
Wenchao Xia |
Subject: |
[Qemu-devel] [PATCH V12 10/18] qmp: add interface query-snapshots |
Date: |
Sat, 13 Apr 2013 16:56:39 +0800 |
This interface returns info of valid internal snapshots for whole vm.
Signed-off-by: Wenchao Xia <address@hidden>
---
block/qapi.c | 17 +++++++++++++++
qapi-schema.json | 14 +++++++++++++
qmp-commands.hx | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 89 insertions(+), 0 deletions(-)
diff --git a/block/qapi.c b/block/qapi.c
index 73c1961..13c7860 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -268,6 +268,23 @@ BlockInfo *bdrv_query_info(BlockDriverState *bs)
return info;
}
+SnapshotInfoList *qmp_query_snapshots(Error **errp)
+{
+ BlockDriverState *bs;
+ SnapshotInfoList *list = NULL;
+
+ /* internal snapshot for whole vm */
+ bs = bdrv_snapshots();
+ if (!bs) {
+ error_setg(errp, "No available block device supports snapshots\n");
+ return NULL;
+ }
+
+ bdrv_query_snapshot_info_list(bs, &list, true, errp);
+
+ return list;
+}
+
BlockInfoList *qmp_query_block(Error **errp)
{
BlockInfoList *head = NULL, **p_next = &head;
diff --git a/qapi-schema.json b/qapi-schema.json
index db542f6..16d0b1f 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -841,6 +841,20 @@
{ 'command': 'query-block', 'returns': ['BlockInfo'] }
##
+# @query-snapshots:
+#
+# Get a list of internal snapshots for the whole virtual machine. Only valid
+# internal snapshots will be returned, inconsistent ones will be ignored
+#
+# Returns: a list of @SnapshotInfo describing all consistent virtual machine
+# snapshots
+#
+# Since: 1.5
+##
+{ 'command': 'query-snapshots',
+ 'returns': ['SnapshotInfo'] }
+
+##
# @BlockDeviceStats:
#
# Statistics of a virtual block device or a block backing device.
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 1e0e11e..e13c029 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -1765,6 +1765,64 @@ EQMP
},
SQMP
+query-snapshots
+---------------
+
+Show the internal consistent snapshot information
+
+Consistent snapshots are snapshots that exist in all writeable block devices.
+When 'savevm' takes a snapshot it uses the same ID across all writeable block
+devices. If a snapshot ID only exists in one block device then it is not a
+consistent one. Each snapshot is represented by a json-object and the returned
+value is a json-array of all snapshots
+
+Each json-object contain 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 nanoseconds 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 nanoseconds to be used with
+ vm-clock-sec (json-int)
+
+Example:
+
+-> { "execute": "query-snapshots" }
+<- {
+ "return":[
+ {
+ "id": "1",
+ "name": "snapshot1",
+ "vm-state-size": 0,
+ "date-sec": 10000200,
+ "date-nsec": 12,
+ "vm-clock-sec": 206,
+ "vm-clock-nsec": 30
+ },
+ {
+ "id": "2",
+ "name": "snapshot2",
+ "vm-state-size": 34000000,
+ "date-sec": 13000200,
+ "date-nsec": 32,
+ "vm-clock-sec": 406,
+ "vm-clock-nsec": 31
+ }
+ ]
+ }
+
+EQMP
+
+ {
+ .name = "query-snapshots",
+ .args_type = "",
+ .mhandler.cmd_new = qmp_marshal_input_query_snapshots,
+ },
+
+SQMP
query-blockstats
----------------
--
1.7.1
- [Qemu-devel] [PATCH V12 05/18] block: add snapshot info query function bdrv_query_snapshot_info_list(), (continued)
- [Qemu-devel] [PATCH V12 05/18] block: add snapshot info query function bdrv_query_snapshot_info_list(), Wenchao Xia, 2013/04/13
- [Qemu-devel] [PATCH V12 08/18] block: add image info query function bdrv_query_image_info(), Wenchao Xia, 2013/04/13
- [Qemu-devel] [PATCH V12 07/18] block: change VM snapshot checking logic, Wenchao Xia, 2013/04/13
- [Qemu-devel] [PATCH V12 09/18] block: move qmp_query_block() and bdrv_query_info() to block/qapi.c, Wenchao Xia, 2013/04/13
- [Qemu-devel] [PATCH V12 02/18] block: distinguish id and name in bdrv_find_snapshot(), Wenchao Xia, 2013/04/13
- [Qemu-devel] [PATCH V12 01/18] block: move bdrv_snapshot_find() to block/snapshot.c, Wenchao Xia, 2013/04/13
- [Qemu-devel] [PATCH V12 10/18] qmp: add interface query-snapshots,
Wenchao Xia <=
- [Qemu-devel] [PATCH V12 11/18] qmp: add recursive member in ImageInfo, Wenchao Xia, 2013/04/13
- [Qemu-devel] [PATCH V12 06/18] block: add check for VM snapshot in bdrv_query_snapshot_info_list(), Wenchao Xia, 2013/04/13
- [Qemu-devel] [PATCH V12 13/18] block: move bdrv_snapshot_dump() and dump_human_image_info() to block/qapi.c, Wenchao Xia, 2013/04/13
- [Qemu-devel] [PATCH V12 15/18] hmp: add function hmp_info_snapshots(), Wenchao Xia, 2013/04/13
- [Qemu-devel] [PATCH V12 17/18] hmp: show ImageInfo in 'info block', Wenchao Xia, 2013/04/13
- [Qemu-devel] [PATCH V12 14/18] block: dump to monitor for bdrv_snapshot_dump() and bdrv_image_info_dump(), Wenchao Xia, 2013/04/13