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(parent: fec0055) | patch
ssh: Support BDRV_REQ_ZERO_WRITE for truncate
authorEric Blake <eblake@redhat.com>
Tue, 28 Apr 2020 20:29:02 +0000 (15:29 -0500)
committerKevin Wolf <kwolf@redhat.com>
Fri, 8 May 2020 11:26:35 +0000 (13:26 +0200)
commitbe9c9404db7e6992946fa55c75ca61dfb20926eb
treed1c974e4a6679cb120caf44aa086c36bb8abf53atree
parentfec00559e71c94749deac176f6c4bebf81fbe7b8commit | diff
ssh: Support BDRV_REQ_ZERO_WRITE for truncate

Our .bdrv_has_zero_init_truncate can detect when the remote side
always zero fills; we can reuse that same knowledge to implement
BDRV_REQ_ZERO_WRITE by ignoring it when the server gives it to us for
free.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200428202905.770727-7-eblake@redhat.com>
Reviewed-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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