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qemu: Assume QEMU_CAPS_DISK_WRITE_CACHE

Browse Source 
Introduced in QEMU's commit of v2.7.0-rc0~32^2~5 the .write-cache
attribute of virtio-blk dvice is always available for all QEMU
versions we support (4.2.0, currently). Therefore, we can assume
the capability is always set and thus doesn't need to be checked
for.

The change in some .args is justified, because the qemuxml2argvdatatest
runs these test caseses with very minimalistic set of capabilities,
that's nowhere near real life scenario.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Michal Privoznik 2022-11-08 08:40:07 +01:00
parent e2927db185
commit f28807a1e0
14 changed files with 14 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/qemu/qemu_command.c
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@ -1900,8 +1900,7 @@ qemuBuildDiskDeviceProps(const virDomainDef *def,
if (disk->cachemode != VIR_DOMAIN_DISK_CACHE_DEFAULT) {
/* VIR_DOMAIN_DISK_DEVICE_LUN translates into 'scsi-block'
* where any caching setting makes no sense. */
if (disk->device != VIR_DOMAIN_DISK_DEVICE_LUN &&
virQEMUCapsGet(qemuCaps, QEMU_CAPS_DISK_WRITE_CACHE)) {
if (disk->device != VIR_DOMAIN_DISK_DEVICE_LUN) {
bool wb;
if (qemuDomainDiskCachemodeFlags(disk->cachemode, &wb, NULL,

2
tests/qemuxml2argvdata/controller-order.args
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@ -29,7 +29,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-fdr/.config \
-device usb-ccid,id=ccid0,bus=usb.0,port=1.1 \
-blockdev '{"driver":"file","filename":"/tmp/fdr.img","aio":"native","node-name":"libvirt-2-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-2-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"raw","file":"libvirt-2-storage"}' \
-device virtio-blk-pci,bus=pci.0,addr=0x5,share-rw=on,drive=libvirt-2-format,id=virtio-disk0,bootindex=1 \
-device virtio-blk-pci,bus=pci.0,addr=0x5,share-rw=on,drive=libvirt-2-format,id=virtio-disk0,bootindex=1,write-cache=on \
-blockdev '{"driver":"file","filename":"/tmp/Fedora-17-x86_64-Live-Desktop.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"}' \
-device ide-cd,bus=ide.1,unit=0,drive=libvirt-1-format,id=ide0-1-0 \

2
tests/qemuxml2argvdata/video-device-pciaddr-default.args
View File

@ -27,7 +27,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
-usb \
-blockdev '{"driver":"file","filename":"/var/lib/libvirt/images/QEMUGuest1","node-name":"libvirt-1-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage"}' \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1 \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1,write-cache=on \
-audiodev '{"id":"audio1","driver":"none"}' \
-vnc 127.0.0.1:0,audiodev=audio1 \
-device qxl-vga,id=video0,max_outputs=1,ram_size=67108864,vram_size=67108864,bus=pci.0,addr=0x3 \

2
tests/qemuxml2argvdata/video-qxl-device-vgamem.args
View File

@ -28,7 +28,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
-usb \
-blockdev '{"driver":"file","filename":"/var/lib/libvirt/images/QEMUGuest1","node-name":"libvirt-1-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage"}' \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1 \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1,write-cache=on \
-audiodev '{"id":"audio1","driver":"none"}' \
-device qxl-vga,id=video0,max_outputs=1,ram_size=67108864,vram_size=67108864,vgamem_mb=16,bus=pci.0,addr=0x2 \
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 \

2
tests/qemuxml2argvdata/video-qxl-device.args
View File

@ -28,7 +28,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
-usb \
-blockdev '{"driver":"file","filename":"/var/lib/libvirt/images/QEMUGuest1","node-name":"libvirt-1-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage"}' \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1 \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1,write-cache=on \
-audiodev '{"id":"audio1","driver":"none"}' \
-device qxl-vga,id=video0,max_outputs=1,ram_size=67108864,vram_size=67108864,bus=pci.0,addr=0x2 \
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 \

2
tests/qemuxml2argvdata/video-qxl-sec-device-vgamem.args
View File

@ -28,7 +28,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
-usb \
-blockdev '{"driver":"file","filename":"/var/lib/libvirt/images/QEMUGuest1","node-name":"libvirt-1-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage"}' \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1 \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1,write-cache=on \
-audiodev '{"id":"audio1","driver":"none"}' \
-device qxl-vga,id=video0,max_outputs=1,ram_size=67108864,vram_size=67108864,vgamem_mb=16,bus=pci.0,addr=0x2 \
-device qxl,id=video1,max_outputs=1,ram_size=67108864,vram_size=67108864,vgamem_mb=16,bus=pci.0,addr=0x4 \

2
tests/qemuxml2argvdata/video-qxl-sec-device.args
View File

@ -28,7 +28,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
-usb \
-blockdev '{"driver":"file","filename":"/var/lib/libvirt/images/QEMUGuest1","node-name":"libvirt-1-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage"}' \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1 \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1,write-cache=on \
-audiodev '{"id":"audio1","driver":"none"}' \
-device qxl-vga,id=video0,max_outputs=1,ram_size=67108864,vram_size=67108864,bus=pci.0,addr=0x2 \
-device qxl,id=video1,max_outputs=1,ram_size=67108864,vram_size=67108864,bus=pci.0,addr=0x4 \

2
tests/qemuxml2argvdata/video-vga-device-vgamem.args
View File

@ -28,7 +28,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
-usb \
-blockdev '{"driver":"file","filename":"/var/lib/libvirt/images/QEMUGuest1","node-name":"libvirt-1-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage"}' \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1 \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1,write-cache=on \
-audiodev '{"id":"audio1","driver":"none"}' \
-device VGA,id=video0,vgamem_mb=16,bus=pci.0,addr=0x2 \
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 \

2
tests/qemuxml2argvdata/video-vga-device.args
View File

@ -28,7 +28,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
-usb \
-blockdev '{"driver":"file","filename":"/var/lib/libvirt/images/QEMUGuest1","node-name":"libvirt-1-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage"}' \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1 \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1,write-cache=on \
-audiodev '{"id":"audio1","driver":"none"}' \
-device VGA,id=video0,bus=pci.0,addr=0x2 \
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 \

2
tests/qemuxml2argvdata/video-virtio-gpu-device.args
View File

@ -28,7 +28,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
-usb \
-blockdev '{"driver":"file","filename":"/var/lib/libvirt/images/QEMUGuest1","node-name":"libvirt-1-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage"}' \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1 \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1,write-cache=on \
-audiodev '{"id":"audio1","driver":"none"}' \
-device virtio-gpu-pci,id=video0,max_outputs=1,bus=pci.0,addr=0x2 \
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 \

2
tests/qemuxml2argvdata/video-virtio-gpu-sdl-gl.args
View File

@ -27,7 +27,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
-usb \
-blockdev '{"driver":"file","filename":"/var/lib/libvirt/images/QEMUGuest1","node-name":"libvirt-1-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage"}' \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1 \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1,write-cache=on \
-display sdl,gl=on \
-device virtio-gpu-pci,id=video0,virgl=on,max_outputs=1,bus=pci.0,addr=0x2 \
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 \

2
tests/qemuxml2argvdata/video-virtio-gpu-spice-gl.args
View File

@ -27,7 +27,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
-usb \
-blockdev '{"driver":"file","filename":"/var/lib/libvirt/images/QEMUGuest1","node-name":"libvirt-1-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage"}' \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1 \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1,write-cache=on \
-audiodev '{"id":"audio1","driver":"spice"}' \
-spice port=0,gl=on,rendernode=/dev/dri/foo,seamless-migration=on \
-device virtio-gpu-pci,id=video0,virgl=on,max_outputs=1,bus=pci.0,addr=0x2 \

2
tests/qemuxml2argvdata/video-virtio-gpu-virgl.args
View File

@ -28,7 +28,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
-usb \
-blockdev '{"driver":"file","filename":"/var/lib/libvirt/images/QEMUGuest1","node-name":"libvirt-1-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage"}' \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1 \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1,write-cache=on \
-audiodev '{"id":"audio1","driver":"none"}' \
-device virtio-gpu-pci,id=video0,virgl=on,max_outputs=1,bus=pci.0,addr=0x2 \
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 \

2
tests/qemuxml2argvdata/video-virtio-vga.args
View File

@ -28,7 +28,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
-usb \
-blockdev '{"driver":"file","filename":"/var/lib/libvirt/images/QEMUGuest1","node-name":"libvirt-1-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage"}' \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1 \
-device ide-hd,bus=ide.0,unit=0,drive=libvirt-1-format,id=ide0-0-0,bootindex=1,write-cache=on \
-audiodev '{"id":"audio1","driver":"none"}' \
-device virtio-vga,id=video0,max_outputs=1,bus=pci.0,addr=0x2 \
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 \