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qemuBlockStorageSourceNeedsFormatLayer: Stop formatting 'raw' driver when not needed

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The 'raw' driver without any special configuration is not needed and
creates overhead in qemu.

Stop using the 'raw' format driver in cases when it's not needed. A
special case when it is needed is for FD passed images with only a
single writable FD passed, where we need an overlay driver to properly
reflect the 'read-only' flag.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa
2023-10-19 22:07:49 +02:00
parent abdcb46012
commit 6eaf3614b6
389 changed files with 1304 additions and 1939 deletions
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25
tests/qemuxmlconfdata/controller-virtio-scsi.x86_64-latest.args
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@@ -32,21 +32,16 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \
-device '{"driver":"virtio-scsi-pci","id":"scsi2","cmd_per_lun":50,"bus":"pci.0","addr":"0x4"}' \
-device '{"driver":"virtio-scsi-pci","id":"scsi3","max_sectors":512,"bus":"pci.0","addr":"0x5"}' \
-device '{"driver":"virtio-scsi-pci","id":"scsi4","ioeventfd":true,"bus":"pci.0","addr":"0x6"}' \
-blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-5-storage","auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-5-format","read-only":false,"driver":"raw","file":"libvirt-5-storage"}' \
-device '{"driver":"scsi-hd","bus":"scsi0.0","channel":0,"scsi-id":0,"lun":0,"device_id":"drive-scsi0-0-0-0","drive":"libvirt-5-format","id":"scsi0-0-0-0","bootindex":1}' \
-blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest2","node-name":"libvirt-4-storage","auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-4-format","read-only":false,"driver":"raw","file":"libvirt-4-storage"}' \
-device '{"driver":"scsi-hd","bus":"scsi1.0","channel":0,"scsi-id":0,"lun":0,"device_id":"drive-scsi1-0-0-0","drive":"libvirt-4-format","id":"scsi1-0-0-0"}' \
-blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest3","node-name":"libvirt-3-storage","auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-3-format","read-only":false,"driver":"raw","file":"libvirt-3-storage"}' \
-device '{"driver":"scsi-hd","bus":"scsi2.0","channel":0,"scsi-id":0,"lun":0,"device_id":"drive-scsi2-0-0-0","drive":"libvirt-3-format","id":"scsi2-0-0-0"}' \
-blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest4","node-name":"libvirt-2-storage","auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-2-format","read-only":false,"driver":"raw","file":"libvirt-2-storage"}' \
-device '{"driver":"scsi-hd","bus":"scsi3.0","channel":0,"scsi-id":0,"lun":0,"device_id":"drive-scsi3-0-0-0","drive":"libvirt-2-format","id":"scsi3-0-0-0"}' \
-blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest5","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-1-format","read-only":false,"driver":"raw","file":"libvirt-1-storage"}' \
-device '{"driver":"scsi-hd","bus":"scsi4.0","channel":0,"scsi-id":0,"lun":0,"device_id":"drive-scsi4-0-0-0","drive":"libvirt-1-format","id":"scsi4-0-0-0"}' \
-blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-5-storage","read-only":false}' \
-device '{"driver":"scsi-hd","bus":"scsi0.0","channel":0,"scsi-id":0,"lun":0,"device_id":"drive-scsi0-0-0-0","drive":"libvirt-5-storage","id":"scsi0-0-0-0","bootindex":1}' \
-blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest2","node-name":"libvirt-4-storage","read-only":false}' \
-device '{"driver":"scsi-hd","bus":"scsi1.0","channel":0,"scsi-id":0,"lun":0,"device_id":"drive-scsi1-0-0-0","drive":"libvirt-4-storage","id":"scsi1-0-0-0"}' \
-blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest3","node-name":"libvirt-3-storage","read-only":false}' \
-device '{"driver":"scsi-hd","bus":"scsi2.0","channel":0,"scsi-id":0,"lun":0,"device_id":"drive-scsi2-0-0-0","drive":"libvirt-3-storage","id":"scsi2-0-0-0"}' \
-blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest4","node-name":"libvirt-2-storage","read-only":false}' \
-device '{"driver":"scsi-hd","bus":"scsi3.0","channel":0,"scsi-id":0,"lun":0,"device_id":"drive-scsi3-0-0-0","drive":"libvirt-2-storage","id":"scsi3-0-0-0"}' \
-blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest5","node-name":"libvirt-1-storage","read-only":false}' \
-device '{"driver":"scsi-hd","bus":"scsi4.0","channel":0,"scsi-id":0,"lun":0,"device_id":"drive-scsi4-0-0-0","drive":"libvirt-1-storage","id":"scsi4-0-0-0"}' \
-audiodev '{"id":"audio1","driver":"none"}' \
-device '{"driver":"virtio-balloon-pci","id":"balloon0","bus":"pci.0","addr":"0x7"}' \
-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \