[PATCH Libvirt 3/3] qemu_command: Generate cmd line for discard and write-zeroes properties

From: Hyman Huang(黄勇) <yong.huang(a)smartx.com&gt; Generate cmd line for virtio-blk.discard and virtio-blk.write-zeroes properties. Also, validate that the requested feature is supported by QEMU. Signed-off-by: Hyman Huang(黄勇) <yong.huang(a)smartx.com&gt; --- src/qemu/qemu_command.c | 2 + src/qemu/qemu_validate.c | 14 +++++ .../disk-virtio-discard.x86_64-latest.args | 44 +++++++++++++++ .../qemuxml2argvdata/disk-virtio-discard.xml | 56 +++++++++++++++++++ tests/qemuxml2argvtest.c | 1 + 5 files changed, 117 insertions(+) create mode 100644 tests/qemuxml2argvdata/disk-virtio-discard.x86_64-latest.args create mode 100644 tests/qemuxml2argvdata/disk-virtio-discard.xml diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index ad224571f3..6954fc5d75 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -1834,6 +1834,8 @@ qemuBuildDiskDeviceProps(const virDomainDef *def, "T:scsi", scsi, "p:num-queues", disk->queues, "p:queue-size", disk->queue_size, + "T:discard", disk->virtio_discard, + "T:write-zeroes", disk->virtio_write_zeroes, NULL) < 0) return NULL; } diff --git a/src/qemu/qemu_validate.c b/src/qemu/qemu_validate.c index 7e09e2c52f..5abe82e1a5 100644 --- a/src/qemu/qemu_validate.c +++ b/src/qemu/qemu_validate.c @@ -2989,6 +2989,20 @@ qemuValidateDomainDeviceDefDiskFrontend(const virDomainDiskDef *disk, _("queue-size property isn't supported by this QEMU binary")); return -1; } + if (disk->virtio_discard && + !virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_BLK_DISCARD)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("discard property for virtio-blk device isn't supported " + "by this QEMU binary")); + return -1; + } + if (disk->virtio_write_zeroes && + !virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_BLK_WRITE_ZEROES)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("write_zeroes property for virtio-blk device isn't " + "supported by this QEMU binary")); + return -1; + } break; case VIR_DOMAIN_DISK_BUS_USB: diff --git a/tests/qemuxml2argvdata/disk-virtio-discard.x86_64-latest.args b/tests/qemuxml2argvdata/disk-virtio-discard.x86_64-latest.args new file mode 100644 index 0000000000..30596a57a5 --- /dev/null +++ b/tests/qemuxml2argvdata/disk-virtio-discard.x86_64-latest.args @@ -0,0 +1,44 @@ +LC_ALL=C \ +PATH=/bin \ +HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1 \ +USER=test \ +LOGNAME=test \ +XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.local/share \ +XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.cache \ +XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \ +/usr/bin/qemu-system-x86_64 \ +-name guest=QEMUGuest1,debug-threads=on \ +-S \ +-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-QEMUGuest1/master-key.aes"}' \ +-machine pc,usb=off,dump-guest-core=off,memory-backend=pc.ram,acpi=off \ +-accel tcg \ +-cpu qemu64 \ +-m size=219136k \ +-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":224395264}' \ +-overcommit mem-lock=off \ +-smp 1,sockets=1,cores=1,threads=1 \ +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \ +-display none \ +-no-user-config \ +-nodefaults \ +-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \ +-mon chardev=charmonitor,id=monitor,mode=control \ +-rtc base=utc \ +-no-shutdown \ +-boot strict=on \ +-device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \ +-blockdev '{"driver":"file","filename":"/tmp/data.img","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":"virtio-blk-pci","discard":true,"write-zeroes":true,"bus":"pci.0","addr":"0x3","drive":"libvirt-4-format","id":"virtio-disk0","bootindex":1}' \ +-blockdev '{"driver":"file","filename":"/tmp/data1.img","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":"virtio-blk-pci","discard":true,"write-zeroes":false,"bus":"pci.0","addr":"0x4","drive":"libvirt-3-format","id":"virtio-disk1"}' \ +-blockdev '{"driver":"file","filename":"/tmp/data2.img","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":"virtio-blk-pci","discard":false,"write-zeroes":true,"bus":"pci.0","addr":"0x5","drive":"libvirt-2-format","id":"virtio-disk2"}' \ +-blockdev '{"driver":"file","filename":"/tmp/data3.img","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":"virtio-blk-pci","discard":false,"write-zeroes":false,"bus":"pci.0","addr":"0x6","drive":"libvirt-1-format","id":"virtio-disk3"}' \ +-audiodev '{"id":"audio1","driver":"none"}' \ +-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \ +-msg timestamp=on diff --git a/tests/qemuxml2argvdata/disk-virtio-discard.xml b/tests/qemuxml2argvdata/disk-virtio-discard.xml new file mode 100644 index 0000000000..54d2a56d18 --- /dev/null +++ b/tests/qemuxml2argvdata/disk-virtio-discard.xml @@ -0,0 +1,56 @@ +<domain type='qemu'> + <name>QEMUGuest1</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219136</memory> + <currentMemory unit='KiB'>219136</currentMemory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='x86_64' machine='pc'>hvm</type> + <boot dev='hd'/> + </os> + <cpu mode='custom' match='exact' check='none'> + <model fallback='forbid'>qemu64</model> + </cpu> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + <emulator>/usr/bin/qemu-system-x86_64</emulator> + <disk type='file' device='disk'> + <driver name='qemu' type='raw' virtio_discard='on' virtio_write_zeroes='on'/> + <source file='/tmp/data.img'/> + <target dev='vda' bus='virtio'/> + <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> + </disk> + <disk type='file' device='disk'> + <driver name='qemu' type='raw' virtio_discard='on' virtio_write_zeroes='off'/> + <source file='/tmp/data1.img'/> + <target dev='vdb' bus='virtio'/> + <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> + </disk> + <disk type='file' device='disk'> + <driver name='qemu' type='raw' virtio_discard='off' virtio_write_zeroes='on'/> + <source file='/tmp/data2.img'/> + <target dev='vdc' bus='virtio'/> + <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> + </disk> + <disk type='file' device='disk'> + <driver name='qemu' type='raw' virtio_discard='off' virtio_write_zeroes='off'/> + <source file='/tmp/data3.img'/> + <target dev='vdd' bus='virtio'/> + <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> + </disk> + <controller type='usb' index='0' model='piix3-uhci'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> + </controller> + <controller type='ide' index='0'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> + </controller> + <controller type='pci' index='0' model='pci-root'/> + <input type='mouse' bus='ps2'/> + <input type='keyboard' bus='ps2'/> + <audio id='1' type='none'/> + <memballoon model='none'/> + </devices> +</domain> diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index 534eb9e699..9c7ff63ff1 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -1420,6 +1420,7 @@ mymain(void) DO_TEST_CAPS_LATEST("net-vdpa"); DO_TEST_CAPS_LATEST("net-vdpa-multiqueue"); DO_TEST_CAPS_LATEST("net-virtio-rss"); + DO_TEST_CAPS_LATEST("disk-virtio-discard"); DO_TEST("hostdev-pci-multifunction", QEMU_CAPS_KVM, -- 2.38.5