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-rw-r--r--block.c3
-rw-r--r--qapi-schema.json9
-rw-r--r--qmp-commands.hx2
3 files changed, 11 insertions, 3 deletions
diff --git a/block.c b/block.c
index 1206bba84d..24323c11d0 100644
--- a/block.c
+++ b/block.c
@@ -2450,6 +2450,9 @@ BlockInfoList *qmp_query_block(Error **errp)
info->value->inserted->backing_file = g_strdup(bs->backing_file);
}
+ info->value->inserted->backing_file_depth =
+ bdrv_get_backing_file_depth(bs);
+
if (bs->io_limits_enabled) {
info->value->inserted->bps =
bs->io_limits.bps[BLOCK_IO_LIMIT_TOTAL];
diff --git a/qapi-schema.json b/qapi-schema.json
index bc55ed2b6d..b58f5cded8 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -398,6 +398,8 @@
#
# @backing_file: #optional the name of the backing file (for copy-on-write)
#
+# @backing_file_depth: number of files in the backing file chain (since: 1.2)
+#
# @encrypted: true if the backing device is encrypted
#
# @bps: total throughput limit in bytes per second is specified
@@ -418,9 +420,10 @@
##
{ 'type': 'BlockDeviceInfo',
'data': { 'file': 'str', 'ro': 'bool', 'drv': 'str',
- '*backing_file': 'str', 'encrypted': 'bool',
- 'bps': 'int', 'bps_rd': 'int', 'bps_wr': 'int',
- 'iops': 'int', 'iops_rd': 'int', 'iops_wr': 'int'} }
+ '*backing_file': 'str', 'backing_file_depth': 'int',
+ 'encrypted': 'bool', 'bps': 'int', 'bps_rd': 'int',
+ 'bps_wr': 'int', 'iops': 'int', 'iops_rd': 'int',
+ 'iops_wr': 'int'} }
##
# @BlockDeviceIoStatus:
diff --git a/qmp-commands.hx b/qmp-commands.hx
index e3cf3c5a1a..ac466382c0 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -1317,6 +1317,7 @@ Each json-object contain the following:
"nbd", "parallels", "qcow", "qcow2", "raw",
"tftp", "vdi", "vmdk", "vpc", "vvfat"
- "backing_file": backing file name (json-string, optional)
+ - "backing_file_depth": number of files in the backing file chain (json-int)
- "encrypted": true if encrypted, false otherwise (json-bool)
- "bps": limit total bytes per second (json-int)
- "bps_rd": limit read bytes per second (json-int)
@@ -1345,6 +1346,7 @@ Example:
"drv":"qcow2",
"encrypted":false,
"file":"disks/test.img",
+ "backing_file_depth":0,
"bps":1000000,
"bps_rd":0,
"bps_wr":0,