From: Peter Krempa Date: Tue, 27 Jul 2021 17:12:09 +0000 (+0200) Subject: qemu: block: Pass discard requests through the copy-on-read block filter X-Git-Tag: v7.6.0-rc2~6 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dc0b9c8376afb88eb3a3156d7e991d29d9c196a8;p=thirdparty%2Flibvirt.git qemu: block: Pass discard requests through the copy-on-read block filter We need to pass the 'trim' requests through the copy-on-read filter so if a user configures a discard policy on the disk the requests get through to the appropriate format layer in the blockdev tree. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1986509 Reported-by: Richard W.M. Jones Tested-by: Richard W.M. Jones Signed-off-by: Peter Krempa Reviewed-by: Daniel P. Berrangé Reviewed-by: Michal Privoznik Reviewed-by: Richard W.M. Jones --- 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"}' \