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1e9054b9c7
<interface type='vhostuser'><backend type='passt'/> needs to run the
passt command just as is done for interface type='user', but then add
vhostuser bits to the qemu commandline/monitor command.
There are some changes to the parsing/validation along with changes to
the vhostuser codepath do do the extra stuff for passt. I tried
keeping them separated into different patches, but then the unit test
failed in a strange way deep down in the bowels of the commandline
generation, so this patch both 1) makes the final changes to
parsing/formatting and 2) adds passt stuff at appropriate places for
vhostuser (as well as making a couple of things *not* happen when the
passt backend is chosen). The result is that you can now have:
<interface type='vhostuser'>
<backend type='passt'/>
...
</interface>
Then as long as you also have the following as a subelement of
<domain>:
<memoryBacking>
<access mode='shared'/>
</memoryBacking>
your passt interfaces will benefit from the greatly improved
efficiency of a vhost-user data path, and all without requiring
special privileges or capabilities *anywhere* (i.e. it works for
unprivileged libvirt (qemu:///session) as well as privileged libvirt).
Resolves: https://issues.redhat.com/browse/RHEL-69455
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
43 lines
2.2 KiB
Plaintext
43 lines
2.2 KiB
Plaintext
LC_ALL=C \
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PATH=/bin \
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HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1 \
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USER=test \
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LOGNAME=test \
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XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.local/share \
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XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.cache \
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XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \
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/usr/bin/qemu-system-x86_64 \
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-name guest=QEMUGuest1,debug-threads=on \
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-S \
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-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-QEMUGuest1/master-key.aes"}' \
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-machine pc,usb=off,dump-guest-core=off,memory-backend=pc.ram,acpi=off \
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-accel tcg \
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-cpu qemu64 \
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-m size=219136k \
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-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":224395264}' \
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-overcommit mem-lock=off \
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-smp 1,sockets=1,cores=1,threads=1 \
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-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
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-display none \
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-no-user-config \
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-nodefaults \
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-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
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-mon chardev=charmonitor,id=monitor,mode=control \
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-rtc base=utc \
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-no-shutdown \
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-boot strict=on \
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-blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","read-only":false}' \
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-device '{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-storage","id":"ide0-0-0","bootindex":1}' \
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-chardev socket,id=charnet0,path=/var/run/libvirt/qemu/passt/-1-QEMUGuest1-net0.socket \
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-netdev '{"type":"vhost-user","chardev":"charnet0","id":"hostnet0"}' \
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-device '{"driver":"virtio-net-pci","netdev":"hostnet0","id":"net0","mac":"00:11:22:33:44:55","bus":"pci.0","addr":"0x2"}' \
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-chardev socket,id=charnet1,path=/var/run/libvirt/qemu/passt/-1-QEMUGuest1-net1.socket \
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-netdev '{"type":"vhost-user","chardev":"charnet1","id":"hostnet1"}' \
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-device '{"driver":"virtio-net-pci","netdev":"hostnet1","id":"net1","mac":"00:11:22:33:44:11","bus":"pci.0","addr":"0x3"}' \
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-chardev socket,id=charnet2,path=/var/run/libvirt/qemu/passt/-1-QEMUGuest1-net2.socket \
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-netdev '{"type":"vhost-user","chardev":"charnet2","id":"hostnet2"}' \
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-device '{"driver":"virtio-net-pci","netdev":"hostnet2","id":"net2","mac":"00:11:22:33:44:11","bus":"pci.0","addr":"0x4"}' \
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-audiodev '{"id":"audio1","driver":"none"}' \
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-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
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-msg timestamp=on
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