virDomainDefMaybeAddHostdevSCSIcontroller() already inherits the model of an existing SCSI controller when auto-adding peers driven by a hostdev whose drive address overflows the highest declared idx. virDomainDefAddDiskControllersForType(), called for the disk-driven analogue, does not -- it passes model=-1 unconditionally. The unspecified peers then arrive at qemuDomainDefaultSCSIControllerModel() and pick up whichever model the capability cascade settles on (typically lsilogic). A user-declared virtio-scsi controller at idx 0 ends up alongside auto-added lsilogic peers at idx 1+.
Plug the same inheritance into qemuDomainDefaultSCSIControllerModel() itself so it covers both the disk-driven path and any other caller that arrives with an unresolved model. The function already prefers architectural defaults (PSeries, ARM virt, RISC-V virt, LoongArch, s390, built-in ESP) over capabilities; peer inheritance slots in just before the capability cascade. A virtio-scsi domain keeps the new peers as virtio-scsi; an lsisas1068 domain stays lsisas1068; a fresh domain with no SCSI controllers still gets the cap-driven default. controller-scsi-auto, the only existing test that flows through this helper, is unaffected (it has no peers to inherit from). controller-scsi-inherit-model covers the new behavior. Signed-off-by: Denis V. Lunev <[email protected]> --- src/qemu/qemu_domain.c | 15 +++++++ ...ller-scsi-inherit-model.x86_64-latest.args | 38 ++++++++++++++++ ...oller-scsi-inherit-model.x86_64-latest.xml | 45 +++++++++++++++++++ .../controller-scsi-inherit-model.xml | 20 +++++++++ tests/qemuxmlconftest.c | 1 + 5 files changed, 119 insertions(+) create mode 100644 tests/qemuxmlconfdata/controller-scsi-inherit-model.x86_64-latest.args create mode 100644 tests/qemuxmlconfdata/controller-scsi-inherit-model.x86_64-latest.xml create mode 100644 tests/qemuxmlconfdata/controller-scsi-inherit-model.xml diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 84c8645259..21f2641521 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -4289,6 +4289,8 @@ virDomainControllerModelSCSI qemuDomainDefaultSCSIControllerModel(const virDomainDef *def, virQEMUCaps *qemuCaps) { + size_t i; + /* For machine types with built-in SCSI controllers, the choice * of model is obvious */ if (qemuDomainHasBuiltinESP(def)) @@ -4305,6 +4307,19 @@ qemuDomainDefaultSCSIControllerModel(const virDomainDef *def, if (qemuDomainIsPSeries(def)) return VIR_DOMAIN_CONTROLLER_MODEL_SCSI_IBMVSCSI; + /* Inherit the model from any peer SCSI controller already + * resolved on this domain. */ + for (i = 0; i < def->ncontrollers; i++) { + const virDomainControllerDef *peer = def->controllers[i]; + + if (peer->type != VIR_DOMAIN_CONTROLLER_TYPE_SCSI) + continue; + if (peer->model == VIR_DOMAIN_CONTROLLER_MODEL_SCSI_DEFAULT || + peer->model == VIR_DOMAIN_CONTROLLER_MODEL_SCSI_AUTO) + continue; + return peer->model; + } + /* If there is no preference, base the choice on device * availability. In this case, lsilogic is favored over * virtio-scsi for backwards compatibility reasons */ diff --git a/tests/qemuxmlconfdata/controller-scsi-inherit-model.x86_64-latest.args b/tests/qemuxmlconfdata/controller-scsi-inherit-model.x86_64-latest.args new file mode 100644 index 0000000000..2bcd9ed92f --- /dev/null +++ b/tests/qemuxmlconfdata/controller-scsi-inherit-model.x86_64-latest.args @@ -0,0 +1,38 @@ +LC_ALL=C \ +PATH=/bin \ +HOME=/var/lib/libvirt/qemu/domain--1-guest \ +USER=test \ +LOGNAME=test \ +XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-guest/.local/share \ +XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-guest/.cache \ +XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-guest/.config \ +/usr/bin/qemu-system-x86_64 \ +-name guest=guest,debug-threads=on \ +-S \ +-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-guest/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 8,sockets=8,cores=1,threads=1 \ +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \ +-display none \ +-no-user-config \ +-nodefaults \ +-chardev socket,id=charmonitor,fd=@mon-fd@,server=on,wait=off \ +-mon chardev=charmonitor,id=monitor,mode=control \ +-rtc base=utc \ +-no-shutdown \ +-boot strict=on \ +-device '{"driver":"virtio-scsi-pci","id":"scsi0","bus":"pci.0","addr":"0x2"}' \ +-device '{"driver":"virtio-scsi-pci","id":"scsi1","bus":"pci.0","addr":"0x3"}' \ +-device '{"driver":"virtio-scsi-pci","id":"scsi2","bus":"pci.0","addr":"0x4"}' \ +-device '{"driver":"virtio-scsi-pci","id":"scsi3","bus":"pci.0","addr":"0x5"}' \ +-blockdev '{"driver":"file","filename":"/tmp/data.qcow2","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}' \ +-blockdev '{"node-name":"libvirt-1-format","read-only":false,"driver":"qcow2","file":"libvirt-1-storage"}' \ +-device '{"driver":"scsi-hd","bus":"scsi3.0","channel":0,"scsi-id":0,"lun":3,"device_id":"drive-scsi3-0-0-3","drive":"libvirt-1-format","id":"scsi3-0-0-3","bootindex":1}' \ +-audiodev '{"id":"audio1","driver":"none"}' \ +-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \ +-msg timestamp=on diff --git a/tests/qemuxmlconfdata/controller-scsi-inherit-model.x86_64-latest.xml b/tests/qemuxmlconfdata/controller-scsi-inherit-model.x86_64-latest.xml new file mode 100644 index 0000000000..b971c89a1b --- /dev/null +++ b/tests/qemuxmlconfdata/controller-scsi-inherit-model.x86_64-latest.xml @@ -0,0 +1,45 @@ +<domain type='qemu'> + <name>guest</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219136</memory> + <currentMemory unit='KiB'>219136</currentMemory> + <vcpu placement='static'>8</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='qcow2'/> + <source file='/tmp/data.qcow2'/> + <target dev='sdy' bus='scsi'/> + <address type='drive' controller='3' bus='0' target='0' unit='3'/> + </disk> + <controller type='scsi' index='0' model='virtio-scsi'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> + </controller> + <controller type='scsi' index='1' model='virtio-scsi'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> + </controller> + <controller type='scsi' index='2' model='virtio-scsi'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> + </controller> + <controller type='scsi' index='3' model='virtio-scsi'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> + </controller> + <controller type='usb' index='0' model='none'/> + <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/qemuxmlconfdata/controller-scsi-inherit-model.xml b/tests/qemuxmlconfdata/controller-scsi-inherit-model.xml new file mode 100644 index 0000000000..45e96b7ea1 --- /dev/null +++ b/tests/qemuxmlconfdata/controller-scsi-inherit-model.xml @@ -0,0 +1,20 @@ +<domain type='qemu'> + <name>guest</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219136</memory> + <vcpu placement='static'>8</vcpu> + <os> + <type arch='x86_64' machine='pc'>hvm</type> + </os> + <devices> + <emulator>/usr/bin/qemu-system-x86_64</emulator> + <controller type='scsi' index='0' model='virtio-scsi'/> + <disk type='file' device='disk'> + <driver name='qemu' type='qcow2'/> + <source file='/tmp/data.qcow2'/> + <target dev='sdy' bus='scsi'/> + </disk> + <controller type='usb' index='0' model='none'/> + <memballoon model='none'/> + </devices> +</domain> diff --git a/tests/qemuxmlconftest.c b/tests/qemuxmlconftest.c index 8e0f4bcb4f..7a441c1fa2 100644 --- a/tests/qemuxmlconftest.c +++ b/tests/qemuxmlconftest.c @@ -1690,6 +1690,7 @@ mymain(void) DO_TEST_CAPS_LATEST_PARSE_ERROR("disk-scsi-product-length"); DO_TEST_CAPS_LATEST("controller-virtio-scsi"); DO_TEST_CAPS_LATEST("controller-scsi-auto"); + DO_TEST_CAPS_LATEST("controller-scsi-inherit-model"); DO_TEST_FULL("controller-scsi-default-unavailable", ".x86_64-latest", ARG_CAPS_ARCH, "x86_64", ARG_CAPS_VER, "latest", -- 2.51.0
