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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