Add fix for discard + copy-on-read affecting virt-v2v (RHBZ#1986509)

0001-qemu-block-Use-discard-unmap-for-the-copy-on-read-bl.patch

@@ -0,0 +1,39 @@
+From 9cccc94408d59ddd8f3b999bb62e133d443987f5 Mon Sep 17 00:00:00 2001
+From: Peter Krempa <pkrempa@redhat.com>
+Date: Tue, 27 Jul 2021 19:12:09 +0200
+Subject: [PATCH] qemu: block: Use 'discard': 'unmap' for the copy-on-read
+ block filter
+
+---
+ src/qemu/qemu_block.c                                       | 1 +
+ tests/qemuxml2argvdata/disk-copy_on_read.x86_64-latest.args | 2 +-
+ 2 files changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c
+index 1610f72d07..4691dff4f7 100644
+--- a/src/qemu/qemu_block.c
++++ b/src/qemu/qemu_block.c
+@@ -2157,6 +2157,7 @@ qemuBlockStorageGetCopyOnReadProps(virDomainDiskDef *disk)
+                                           "s:driver", "copy-on-read",
+                                           "s:node-name", priv->nodeCopyOnRead,
+                                           "s:file", disk->src->nodeformat,
++                                          "s:discard", "unmap",
+                                           NULL));
+ 
+     return ret;
+diff --git a/tests/qemuxml2argvdata/disk-copy_on_read.x86_64-latest.args b/tests/qemuxml2argvdata/disk-copy_on_read.x86_64-latest.args
+index 93d3a06c88..690d4f3ea1 100644
+--- a/tests/qemuxml2argvdata/disk-copy_on_read.x86_64-latest.args
++++ b/tests/qemuxml2argvdata/disk-copy_on_read.x86_64-latest.args
+@@ -30,7 +30,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-test/.config \
+ -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x6 \
+ -blockdev '{"driver":"file","filename":"/var/lib/libvirt/images/f14.img","node-name":"libvirt-2-storage","auto-read-only":true,"discard":"unmap"}' \
+ -blockdev '{"node-name":"libvirt-2-format","read-only":false,"driver":"qcow2","file":"libvirt-2-storage"}' \
+--blockdev '{"driver":"copy-on-read","node-name":"libvirt-CoR-vda","file":"libvirt-2-format"}' \
++-blockdev '{"driver":"copy-on-read","node-name":"libvirt-CoR-vda","file":"libvirt-2-format","discard":"unmap"}' \
+ -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=libvirt-CoR-vda,id=virtio-disk0,bootindex=2 \
+ -blockdev '{"driver":"file","filename":"/var/lib/libvirt/Fedora-14-x86_64-Live-KDE.iso","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}' \
+ -blockdev '{"node-name":"libvirt-1-format","read-only":true,"driver":"raw","file":"libvirt-1-storage"}' \
+-- 
+2.32.0
+

libvirt.spec

@@ -201,7 +201,7 @@
 Summary: Library providing a simple virtualization API
 Name: libvirt
 Version: 7.5.0
-Release: 2%{?dist}
+Release: 3%{?dist}
 License: LGPLv2+
 URL: https://libvirt.org/
 
@@ -210,6 +210,10 @@ URL: https://libvirt.org/
 %endif
 Source: https://libvirt.org/sources/%{?mainturl}libvirt-%{version}.tar.xz
 
+# Not upstream, but already reviewed and acked for 7.6
+# https://listman.redhat.com/archives/libvir-list/2021-July/msg00823.html
+Patch1: 0001-qemu-block-Use-discard-unmap-for-the-copy-on-read-bl.patch
+
 Requires: libvirt-daemon = %{version}-%{release}
 Requires: libvirt-daemon-config-network = %{version}-%{release}
 Requires: libvirt-daemon-config-nwfilter = %{version}-%{release}
@@ -1902,6 +1906,9 @@ exit 0
 
 
 %changelog
+* Wed Jul 28 2021 Richard W.M. Jones <rjones@redhat.com> - 7.5.0-3
+- Add fix for discard + copy-on-read affecting virt-v2v (RHBZ#1986509)
+
 * Thu Jul 22 2021 Fedora Release Engineering <releng@fedoraproject.org> - 7.5.0-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild