Matej,
There has been a long standing issue with vhost-user reconnection to
QEMU. I don't recall if the QEMU folks have committed a fix for that
issue, but Matus Fabian worked on it when he first started working on VPP.
cc'ing Matus for his input.
Thanks,
-daw-
On 03/31/2017 05:02 AM, Matej Klotton -X (mklotton - PANTHEON
TECHNOLOGIES at Cisco) wrote:
Hi all,
Does VPP support reconnect to existing qemu’s vhost user socket?
I configured vhost-user interface on VPP (client), I started qemu, I
restarted VPP and reconfigured VPP.
Before restart packet was forwarded to the VM, after restart no packet
received on the VM.
VPP config:
sw_interface_set_flags sw_if_index 1 admin-up
sw_interface_set_flags sw_if_index 2 admin-up
create_vhost_user_if socket /tmp/sock1
create_vhost_user_if socket /tmp/sock2
sw_interface_set_flags sw_if_index 5 admin-up
sw_interface_set_flags sw_if_index 6 admin-up
bridge_domain_add_del bd_id 101 flood 1 uu-flood 1 forward 1 learn 1
arp-term 0
bridge_domain_add_del bd_id 102 flood 1 uu-flood 1 forward 1 learn 1
arp-term 0
sw_interface_set_l2_bridge sw_if_index 5 bd_id 101 shg 0 enable
sw_interface_set_l2_bridge sw_if_index 6 bd_id 102 shg 0 enable
sw_interface_set_l2_bridge sw_if_index 1 bd_id 101 shg 0 enable
sw_interface_set_l2_bridge sw_if_index 2 bd_id 102 shg 0 enable
root@sut1:/home/cisco# /usr/bin/qemu-system-x86_64 -smp
1,sockets=1,cores=1,threads=1 -object
memory-backend-file,id=mem,size=512M,mem-path=/mnt/huge,share=on -m
512 -numa node,memdev=mem -net user,hostfwd=tcp::10022-:22 -cpu host
-daemonize -enable-kvm -machine pc,accel=kvm,usb=off,mem-merge=off
-net nic,macaddr=52:54:00:00:01:ff -balloon none -chardev
socket,id=char1,path=/tmp/sock1,server -netdev
vhost-user,id=vhost1,chardev=char1,queues=1 -device
virtio-net-pci,netdev=vhost1,mac=52:54:00:00:01:01,mq=on,csum=off,gso=off,guest_tso4=off,guest_tso6=off,guest_ecn=off,mrg_rxbuf=off
-chardev socket,id=char2,path=/tmp/sock2,server -netdev
vhost-user,id=vhost2,chardev=char2,queues=1 -device
virtio-net-pci,netdev=vhost2,mac=52:54:00:00:01:02,mq=on,csum=off,gso=off,guest_tso4=off,guest_tso6=off,guest_ecn=off,mrg_rxbuf=off
-drive
file=/var/lib/vm/vhost-nested.img,format=raw,cache=none,if=virtio -qmp
unix:/tmp/qmp1.sock,server,nowait -chardev
socket,host=127.0.0.1,port=4556,id=gnc0,server,nowait -device
isa-serial,chardev=gnc0 -chardev
socket,path=/tmp/qga1.sock,server,nowait,id=qga0 -device
isa-serial,chardev=qga0 -monitor none -display none -vga none -pidfile
/tmp/qemu1.pid
QEMU waiting for connection on: disconnected:unix:/tmp/sock1,server
QEMU waiting for connection on: disconnected:unix:/tmp/sock2,server
root@sut1:/home/cisco#
vpp# show vhost-user VirtualEthernet0/0/0
Virtio vhost-user interfaces
Global:
coalesce frames 32 time 1e-3
Interface: VirtualEthernet0/0/0 (ifindex 5)
virtio_net_hdr_sz 10
features mask (0xffffffffffffffff):
features (0x58600000):
VIRTIO_NET_F_GUEST_ANNOUNCE (21)
VIRTIO_NET_F_MQ (22)
VIRTIO_F_ANY_LAYOUT (27)
VIRTIO_F_INDIRECT_DESC (28)
VHOST_USER_F_PROTOCOL_FEATURES (30)
protocol features (0x3)
VHOST_USER_PROTOCOL_F_MQ (0)
VHOST_USER_PROTOCOL_F_LOG_SHMFD (1)
socket filename /tmp/sock1 type client errno "Success"
rx placement:
thread 0 on vring 1
tx placement: lock-free
thread 0 on vring 0
Memory regions (total 1)
region fd guest_phys_addr memory_size userspace_addr
mmap_offset mmap_addr
====== ===== ================== ================== ==================
================== ==================
0 26 0x0000000000000000 0x0000000020000000 0x00007f3503200000
0x0000000000000000 0x00007ff944800000
Virtqueue 0 (TX)
qsz 256 last_avail_idx 0 last_used_idx 0
avail.flags 0 avail.idx 256 used.flags 1 used.idx 0
kickfd 27 callfd 28 errfd -1
Virtqueue 1 (RX)
qsz 256 last_avail_idx 0 last_used_idx 0
avail.flags 0 avail.idx 0 used.flags 1 used.idx 0
kickfd 22 callfd 29 errfd -1
root@sut1:/home/cisco# service vpp restart
vat# exec show vhost-user VirtualEthernet0/0/0
Virtio vhost-user interfaces
Global:
coalesce frames 32 time 1e-3
Interface: VirtualEthernet0/0/0 (ifindex 5)
virtio_net_hdr_sz 0
features mask (0xffffffffffffffff):
features (0x0):
protocol features (0x0)
socket filename /tmp/sock1 type client errno "Success"
rx placement:
tx placement: spin-lock
thread 0 on vring 0
Memory regions (total 0)
vat#
vat# exec show ver
vpp v17.04-rc0~419-gdeee5ee~b4400 built by jenkins on
ubuntu1604-basebuild-4c-4g-4199 at Sun Mar 12 23:22:32 UTC 2017
root@sut1:/home/cisco# qemu-system-x86_64 --version
QEMU emulator version 2.5.0 (Debian 1:2.5+dfsg-5ubuntu10.9), Copyright
(c) 2003-2008 Fabrice Bellard
Thanks,
Matej
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