Description of problem:

boot guest with "Ctrl_vlan=on" in cmd and check vlan table in rx-filter information when guest starts.It turns out that the vlan table is filled from 0~4095.


Version-Release number of selected component (if applicable):

host version:
virtio-win-prewhql-162
kernel-4.18.0-48.el8.x86_64
qemu-kvm-3.1.0-0.module+el8+2266+616cf026
seabios-1.11.1-2.module+el8+2179+85112f94.src.rpm

Guest: win2019-q35

How reproducible:

100%

Steps to Reproduce:

1.boot a win2019 guest with cmd:
/usr/libexec/qemu-kvm \
-M q35,kernel-irqchip=split \
-cpu host,+kvm_pv_unhalt,hv_relaxed,hv_spinlocks=0x1fff,hv_vapic,hv_time -name NIC2019x8664q35 -enable-kvm \
-m 3G -smp 4 -uuid cd270a7c-fdd8-11e8-bec6-1866daf23dc8 -nodefaults -rtc base=localtime,driftfix=slew -boot order=cd,menu=on \
-device piix3-usb-uhci,id=usb,bus=pcie.0 \
-drive file=net.raw,if=none,id=drive-ide0-0-0,format=raw,cache=none \
-device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,share-rw=on   -chardev pty,id=charserial0 \
-device isa-serial,chardev=charserial0,id=isa_serial0 -device usb-tablet,id=input0 \
-vnc 0.0.0.0:0 -vga std \
-qmp tcp:0:4445,server,nowait -monitor stdio \
-device pcie-root-port,id=pcie.0-root-port-4,slot=4,chassis=4,addr=0x4,bus=pcie.0 \
-netdev tap,script=/etc/qemu-ifup,downscript=no,id=hostnet0,vhost=on,queues=4 \
-device virtio-net-pci,netdev=hostnet0,id=net0,mac=00:52:3b:35:88:00,mq=on,vectors=10,bus=pcie.0-root-port-4,status=on,ctrl_vlan=on \
-cdrom /home/kvm_autotest_root/iso/ISO/Win2019/en_windows_server_2019_x64_dvd_4cb967d8.iso \
-drive file=virtio-win-prewhql-0.1-162.iso,format=raw,if=none,id=drive2,media=cdrom,readonly=off -device ide-drive,drive=drive2,bus=ide.1,unit=0,id=cdrom \

2.check vlan table in rx-filter information in QMP:

{"QMP": {"version": {"qemu": {"micro": 92, "minor": 0, "major": 3}, "package": "qemu-kvm-3.1.0-0.module+el8+2266+616cf026.next.candidate"}, "capabilities": []}}
{ "execute": "qmp_capabilities" }
{"return": {}}
{"timestamp": {"seconds": 1544674318, "microseconds": 301614}, "event": "NIC_RX_FILTER_CHANGED", "data": {"name": "net0", "path": "/machine/peripheral/net0/virtio-backend"}}
{ "execute": "query-rx-filter", "arguments": { "name": "net0" } }

Actual results:

{"return": [{"promiscuous": false, "name": "net0", "main-mac": "00:52:3b:35:88:00", "unicast": "normal", "vlan": "normal", "vlan-table": [4095, 4094, 4093, 4092, 4091, 4090, 4089, 4088, 4087, 4086, 4085, 4084, 4083, 4082, 4081, 4080, 4079, 4078, 4077, 4076, 4075, 4074, 4073, 4072, 4071, 4070, 4069, 4068, 4067, ...................... 54, 53, 52, 51, 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0], "unicast-table": [], "multicast": "normal", "multicast-overflow": false, "unicast-overflow": false, "multicast-table": ["33:33:ff:8b:8b:db", "01:00:5e:00:00:01", "33:33:00:00:00:01"], "broadcast-allowed": false}]}
{"timestamp": {"seconds": 1544674326, "microseconds": 399397}, "event": "NIC_RX_FILTER_CHANGED", "data": {"name": "net0", "path": "/machine/peripheral/net0/virtio-backend"}}

Expected results:
vlan-table is [] for RHEL8.0 guest.

Additional info:

1)After doing the steps mentioned above and then set vlan id =1 in device manager,check the vlan-table again , the result is: "vlan-table": [1]
Then shutdown and boot guest with "ctrl_vlan=off", check the vlan-table again , the result is: the vlan-table is filled from 0~4095.

2)for rhel7.6 guest, not hit this issue, with "ctrl_vlan=on" in cmd and then check vlan-table info in QMP , the result  is :

{"return": [{"promiscuous": false, "name": "net0", "main-mac": "00:52:3b:35:88:00", "unicast": "normal", "vlan": "normal", "vlan-table": [0], "unicast-table": [], "multicast": "normal", "multicast-overflow": false, "unicast-overflow": false, "multicast-table": ["01:00:5e:00:00:fb", "33:33:ff:35:88:00", "33:33:00:00:00:01", "01:00:5e:00:00:01"], "broadcast-allowed": false}]}