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From 1d94395d19ccfd501c5ce7ed2b300a1ac72cf0c0 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 06:11:49 +0200
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Subject: [PATCH 175/268] block-backend: Add blk_co_copy_range
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RH-Author: Fam Zheng <famz@redhat.com>
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Message-id: <20180629061153.12687-10-famz@redhat.com>
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Patchwork-id: 81161
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O-Subject: [RHEL-7.6 qemu-kvm-rhev PATCH v2 09/13] block-backend: Add blk_co_copy_range
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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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It's a BlockBackend wrapper of the BDS interface.
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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: 20180601092648.24614-10-famz@redhat.com
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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(cherry picked from commit b5679fa49c9a70efa7bf01f6efad1a65e2349a0b)
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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/block-backend.c | 18 ++++++++++++++++++
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include/sysemu/block-backend.h | 4 ++++
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2 files changed, 22 insertions(+)
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diff --git a/block/block-backend.c b/block/block-backend.c
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index 681b240..5562ec4 100644
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--- a/block/block-backend.c
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+++ b/block/block-backend.c
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@@ -2217,3 +2217,21 @@ void blk_unregister_buf(BlockBackend *blk, void *host)
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{
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bdrv_unregister_buf(blk_bs(blk), host);
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}
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+
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+int coroutine_fn blk_co_copy_range(BlockBackend *blk_in, int64_t off_in,
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+ BlockBackend *blk_out, int64_t off_out,
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+ int bytes, BdrvRequestFlags flags)
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+{
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+ int r;
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+ r = blk_check_byte_request(blk_in, off_in, bytes);
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+ if (r) {
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+ return r;
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+ }
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+ r = blk_check_byte_request(blk_out, off_out, bytes);
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+ if (r) {
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+ return r;
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+ }
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+ return bdrv_co_copy_range(blk_in->root, off_in,
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+ blk_out->root, off_out,
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+ bytes, flags);
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+}
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diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h
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index 92ab624..8d03d49 100644
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--- a/include/sysemu/block-backend.h
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+++ b/include/sysemu/block-backend.h
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@@ -232,4 +232,8 @@ void blk_set_force_allow_inactivate(BlockBackend *blk);
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void blk_register_buf(BlockBackend *blk, void *host, size_t size);
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void blk_unregister_buf(BlockBackend *blk, void *host);
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+int coroutine_fn blk_co_copy_range(BlockBackend *blk_in, int64_t off_in,
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+ BlockBackend *blk_out, int64_t off_out,
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+ int bytes, BdrvRequestFlags flags);
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+
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#endif
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--
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1.8.3.1
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