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qmp: Add optional bool "unmap" to drive-mirror

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If specified as "true", it allows discarding on target sectors where source is
not allocated.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Fam Zheng
2015-06-08 13:56:08 +08:00
committed by Stefan Hajnoczi
parent ba3f0e2545
commit 0fc9f8ea28
6 changed files with 24 additions and 4 deletions
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8
qapi/block-core.json
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@@ -975,6 +975,11 @@
# @on-target-error: #optional the action to take on an error on the target,
# default 'report' (no limitations, since this applies to
# a different block device than @device).
# @unmap: #optional Whether to try to unmap target sectors where source has
# only zero. If true, and target unallocated sectors will read as zero,
# target image sectors will be unmapped; otherwise, zeroes will be
# written. Both will result in identical contents.
# Default is true. (Since 2.4)
#
# Returns: nothing on success
# If @device is not a valid block device, DeviceNotFound
@@ -987,7 +992,8 @@
'sync': 'MirrorSyncMode', '*mode': 'NewImageMode',
'*speed': 'int', '*granularity': 'uint32',
'*buf-size': 'int', '*on-source-error': 'BlockdevOnError',
'*on-target-error': 'BlockdevOnError' } }
'*on-target-error': 'BlockdevOnError',
'*unmap': 'bool' } }
##
# @BlockDirtyBitmap