how to use `socat` setup bid pipe between host and vm?
qm showcmd 100 output:
/usr/bin/kvm -id 100 -name louwa -no-shutdown -chardev 'socket,id=qmp,path=/var/run/qemu-server/100.qmp,server=on,wait=off' -mon 'chardev=qmp,mode=control' -chardev 'socket,id=qmp-event,path=/var/run/qmeventd.sock,reconnect=5' -mon 'chardev=qmp-event,mode=control' -pidfile /var/run/qemu-server/100.pid -daemonize -smbios 'type=1,uuid=8bd9a368-67fe-420e-9033-9ee7e78cf865' -smp '12,sockets=1,cores=12,maxcpus=12' -nodefaults -boot 'menu=on,strict=on,reboot-timeout=1000,splash=/usr/share/qemu-server/bootsplash.jpg' -vnc 'unix:/var/run/qemu-server/100.vnc,password=on' -cpu kvm64,enforce,+kvm_pv_eoi,+kvm_pv_unhalt,+lahf_lm,+sep -m 16384 -device 'pci-bridge,id=pci.1,chassis_nr=1,bus=pci.0,addr=0x1e' -device 'pci-bridge,id=pci.2,chassis_nr=2,bus=pci.0,addr=0x1f' -device 'vmgenid,guid=4e6d169b-351b-4023-9081-d1f2f2dd3c88' -device 'piix3-usb-uhci,id=uhci,bus=pci.0,addr=0x1.0x2' -chardev 'socket,id=serial0,path=/var/run/qemu-server/100.serial0,server=on,wait=off' -device 'isa-serial,chardev=serial0' -device 'qxl-vga,id=vga,max_outputs=4,bus=pci.0,addr=0x2' -device 'virtio-serial,id=spice,bus=pci.0,addr=0x9' -chardev 'spicevmc,id=vdagent,name=vdagent' -device 'virtserialport,chardev=vdagent,name=com.redhat.spice.0' -spice 'tls-port=61001,addr=127.0.0.1,tls-ciphers=HIGH,seamless-migration=on' -device 'virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3' -iscsi 'initiator-name=iqn.1993-08.org.debian:01:10433c2839cf' -drive 'file=/mnt/sdb/template/iso/CentOS-7-x86_64-DVD-1804.iso,if=none,id=drive-ide2,media=cdrom,aio=io_uring' -device 'ide-cd,bus=ide.1,unit=0,drive=drive-ide2,id=ide2,bootindex=101' -device 'virtio-scsi-pci,id=scsihw0,bus=pci.0,addr=0x5' -drive 'file=/mnt/sdb/images/100/vm-100-disk-0.qcow2,if=none,id=drive-scsi0,format=qcow2,cache=none,aio=io_uring,detect-zeroes=on' -device 'scsi-hd,bus=scsihw0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0,id=scsi0,bootindex=100' -netdev 'type=tap,id=net0,ifname=tap100i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' -device 'virtio-net-pci,mac=2A:9F:94:C6:59:50,netdev=net0,bus=pci.0,addr=0x12,id=net0,bootindex=102' -netdev 'type=tap,id=net1,ifname=tap100i1,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' -device 'virtio-net-pci,mac=62:ED:4C:08:D0:F0,netdev=net1,bus=pci.0,addr=0x13,id=net1' -netdev 'type=tap,id=net2,ifname=tap100i2,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' -device 'virtio-net-pci,mac=6E:25:D8:2F:AD:12,netdev=net2,bus=pci.0,addr=0x14,id=net2' -netdev 'type=tap,id=net3,ifname=tap100i3,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' -device 'virtio-net-pci,mac=FA:FB:DD:21:26:0D,netdev=net3,bus=pci.0,addr=0x15,id=net3' -netdev 'type=tap,id=net4,ifname=tap100i4,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' -device 'virtio-net-pci,mac=F2:59:C8:97:B6:32,netdev=net4,bus=pci.0,addr=0x16,id=net4' -netdev 'type=tap,id=net5,ifname=tap100i5,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' -device 'virtio-net-pci,mac=D6:C5:AF:5F:C2:9B,netdev=net5,bus=pci.0,addr=0x17,id=net5' -machine 'type=pc+pve0'