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From 5d79960f00eebe7a8a8bcd423f39c4e72f3366d1 Mon Sep 17 00:00:00 2001
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From: Fam Zheng <famz@redhat.com>
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Date: Fri, 29 Jun 2018 06:11:43 +0200
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Subject: [PATCH 39/57] raw: Implement copy offloading
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RH-Author: Fam Zheng <famz@redhat.com>
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Message-id: <20180629061153.12687-4-famz@redhat.com>
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Patchwork-id: 81155
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O-Subject: [RHEL-7.6 qemu-kvm-rhev PATCH v2 03/13] raw: Implement copy offloading
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Bugzilla: 1482537
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
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Just pass down to ->file.
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Signed-off-by: Fam Zheng <famz@redhat.com>
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Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
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Message-id: 20180601092648.24614-4-famz@redhat.com
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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(cherry picked from commit 72d219e2f916adeec9845473d239571a267f3314)
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Signed-off-by: Fam Zheng <famz@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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block/raw-format.c | 32 ++++++++++++++++++++++++++++++++
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1 file changed, 32 insertions(+)
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diff --git a/block/raw-format.c b/block/raw-format.c
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index b69a067..f2e468d 100644
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--- a/block/raw-format.c
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+++ b/block/raw-format.c
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@@ -497,6 +497,36 @@ static int raw_probe_geometry(BlockDriverState *bs, HDGeometry *geo)
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return bdrv_probe_geometry(bs->file->bs, geo);
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}
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+static int coroutine_fn raw_co_copy_range_from(BlockDriverState *bs,
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+ BdrvChild *src, uint64_t src_offset,
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+ BdrvChild *dst, uint64_t dst_offset,
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+ uint64_t bytes, BdrvRequestFlags flags)
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+{
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+ int ret;
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+
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+ ret = raw_adjust_offset(bs, &src_offset, bytes, false);
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+ if (ret) {
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+ return ret;
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+ }
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+ return bdrv_co_copy_range_from(bs->file, src_offset, dst, dst_offset,
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+ bytes, flags);
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+}
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+
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+static int coroutine_fn raw_co_copy_range_to(BlockDriverState *bs,
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+ BdrvChild *src, uint64_t src_offset,
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+ BdrvChild *dst, uint64_t dst_offset,
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+ uint64_t bytes, BdrvRequestFlags flags)
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+{
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+ int ret;
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+
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+ ret = raw_adjust_offset(bs, &dst_offset, bytes, true);
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+ if (ret) {
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+ return ret;
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+ }
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+ return bdrv_co_copy_range_to(src, src_offset, bs->file, dst_offset, bytes,
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+ flags);
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+}
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+
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BlockDriver bdrv_raw = {
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.format_name = "raw",
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.instance_size = sizeof(BDRVRawState),
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@@ -513,6 +543,8 @@ BlockDriver bdrv_raw = {
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.bdrv_co_pwrite_zeroes = &raw_co_pwrite_zeroes,
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.bdrv_co_pdiscard = &raw_co_pdiscard,
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.bdrv_co_block_status = &raw_co_block_status,
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+ .bdrv_co_copy_range_from = &raw_co_copy_range_from,
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+ .bdrv_co_copy_range_to = &raw_co_copy_range_to,
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.bdrv_truncate = &raw_truncate,
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.bdrv_getlength = &raw_getlength,
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.has_variable_length = true,
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--
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1.8.3.1
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