Re: qemu couldn't connect the unix domain socket

[Li Feng <fengli@smartx.com>]

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On Tue, Oct 26, 2021 at 1:28 PM Li Feng <fengli(a)smartx.com> wrote:
>
> Hi,
> I just tested the master code, the passt just exited without any error.
>
> ```
> $ ./passt
> Outbound interface: ens192
> ARP:
>     address: 00:50:56:be:9d:1f
> DHCP:
>     assign: 192.168.64.217
>     mask: 255.255.240.0
>     router: 192.168.64.1
>         search:
>             .
> UNIX domain socket bound at /tmp/passt_1.socket
>
> You can now start qrap:
>     ./qrap 5 kvm ... -net socket,fd=5 -net nic,model=virtio
> or directly qemu, patched with:
>     qemu/0001-net-Allow-also-UNIX-domain-sockets-to-be-used-as-net.patch
> as follows:
>     kvm ... -net socket,connect=/tmp/passt_1.socket -net nic,model=virtio
> 21-10-26 13:23:43 root(a)192.168.64.217:~/passt(master✗)
> ```
> Another terminal:
> ```
> $ bash x.sh
> recv: Connection reset by peer
> Probe of /tmp/passt_1.socket failed
> connect: No such file or directory
> Probe of /tmp/passt_2.socket failed
> connect: No such file or directory
> Probe of /tmp/passt_3.socket failed
> ...
> ```
>
> ```
> $ cat x.sh
> ./qrap 5 /root/qemu-master/build/qemu-system-x86_64 -uuid
> 1869b108-42b3-42a7-852e-70261d73f6a9 -name
> guest=1869b108-42b3-42a7-852e-70261d73f6a9 -cpu host -enable-kvm -smp
> 4 -device pci-bridge,chassis_nr=1,id=pci.0 -device
> pci-bridge,chassis_nr=1,id=pci.1 -device
> virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x10 -fsdev
> local,security_model=mapped,id=fsdev-fs0,path=/root -device
> virtio-9p-pci,id=fs0,fsdev=fsdev-fs0,mount_tag=fs0 -device
> intel-iommu,device-iotlb=on,intremap=on -M
> q35,accel=kvm,kernel-irqchip=split -serial mon:stdio -nographic -m
> size=2048M,maxmem=32G,slots=128 -device virtio-balloon -drive
> file=/root/fedora34.qcow2,format=qcow2,cache=none,aio=native,if=none,id=drive-virtio-disk1,file.locking=off
> -device virtio-blk-pci,scsi=off,drive=drive-virtio-disk1,id=virtio-disk1,bootindex=1
> -vnc 0.0.0.0:101 -chardev
> socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-222-29ec19c9-d330-4949-b/monitor.sock,server,nowait
> -mon chardev=charmonitor,id=monitor,mode=control -qmp
> tcp:0.0.0.0:2235,server,nowait -device
> virtio-serial-pci,id=virtio-serial0,max_ports=16 -net socket,fd=5 -net
> nic,model=virtio
> ```
>
> Thanks,
> Feng Li