[ovs-dev] [PATCHv7] netdev-afxdp: add new netdev type for AF_XDP.
William Tu
u9012063 at gmail.com
Wed May 8 16:59:25 UTC 2019
Hi Ilya,
Thanks for your review.
I will fix them in my next version.
On Mon, May 6, 2019 at 5:37 AM Ilya Maximets <i.maximets at samsung.com> wrote:
>
> Hi. Thanks for a new version.
>
> Quick review inline.
>
> Best regards, Ilya Maximets.
>
> On 03.05.2019 22:02, William Tu wrote:
> > The patch introduces experimental AF_XDP support for OVS netdev.
> > AF_XDP, Address Family of the eXpress Data Path, is a new Linux socket type
> > built upon the eBPF and XDP technology. It is aims to have comparable
> > performance to DPDK but cooperate better with existing kernel's networking
> > stack. An AF_XDP socket receives and sends packets from an eBPF/XDP program
> > attached to the netdev, by-passing a couple of Linux kernel's subsystems
> > As a result, AF_XDP socket shows much better performance than AF_PACKET
> > For more details about AF_XDP, please see linux kernel's
> > Documentation/networking/af_xdp.rst
> >
> > Signed-off-by: William Tu <u9012063 at gmail.com>
> >
> > ---
> > v1->v2:
> > - add a list to maintain unused umem elements
> > - remove copy from rx umem to ovs internal buffer
> > - use hugetlb to reduce misses (not much difference)
> > - use pmd mode netdev in OVS (huge performance improve)
> > - remove malloc dp_packet, instead put dp_packet in umem
> >
> > v2->v3:
> > - rebase on the OVS master, 7ab4b0653784
> > ("configure: Check for more specific function to pull in pthread library.")
> > - remove the dependency on libbpf and dpif-bpf.
> > instead, use the built-in XDP_ATTACH feature.
> > - data structure optimizations for better performance, see[1]
> > - more test cases support
> > v3: https://mail.openvswitch.org/pipermail/ovs-dev/2018-November/354179.html
> >
> > v3->v4:
> > - Use AF_XDP API provided by libbpf
> > - Remove the dependency on XDP_ATTACH kernel patch set
> > - Add documentation, bpf.rst
> >
> > v4->v5:
> > - rebase to master
> > - remove rfc, squash all into a single patch
> > - add --enable-afxdp, so by default, AF_XDP is not compiled
> > - add options: xdpmode=drv,skb
> > - add multiple queue and multiple PMD support, with options: n_rxq
> > - improve documentation, rename bpf.rst to af_xdp.rst
> >
> > v5->v6
> > - rebase to master, commit 0cdd5b13de91b98
> > - address errors from sparse and clang
> > - pass travis-ci test
> > - address feedback from Ben
> > - fix issues reported by 0-day robot
> > - improved documentation
> >
> > v6-v7
> > - rebase to master, commit abf11558c1515bf3b1
> > - address feedbacks from Ilya, Ben, and Eelco, see:
> > https://www.mail-archive.com/ovs-dev@openvswitch.org/msg32357.html
> > - add XDP mode change, implement get/set_config, reconfigure
> > - Fix reconfiguration/crash issue caused by libbpf, see patch:
> > [PATCH bpf 0/2] libbpf: fixes for AF_XDP teardown
> > - perf optimization for batching umem_push/pop
> > - perf optimization for batching kick_tx
> > - test build with dpdk
> > - fix/refactor atomic operation
> > - make AF_XDP x86 specific, otherwise fail at build time
> > - lots of code refactoring
> > - add PVP setup in documentation
> > ---
> > ---
> > Documentation/automake.mk | 1 +
> > Documentation/index.rst | 1 +
> > Documentation/intro/install/afxdp.rst | 469 ++++++++++++++++
> > Documentation/intro/install/index.rst | 1 +
> > acinclude.m4 | 32 ++
> > configure.ac | 1 +
> > lib/automake.mk | 12 +
> > lib/dp-packet.c | 12 +
> > lib/dp-packet.h | 18 +
> > lib/dpif-netdev-perf.h | 14 +
> > lib/netdev-afxdp.c | 698 ++++++++++++++++++++++++
> > lib/netdev-afxdp.h | 51 ++
> > lib/netdev-linux.c | 118 ++--
> > lib/netdev-linux.h | 72 +++
> > lib/netdev-provider.h | 4 +-
> > lib/netdev.c | 3 +
> > lib/xdpsock.c | 236 ++++++++
> > lib/xdpsock.h | 127 +++++
> > tests/automake.mk | 17 +
> > tests/system-afxdp-macros.at | 153 ++++++
> > tests/system-afxdp-testsuite.at | 26 +
> > tests/system-afxdp-traffic.at | 978 ++++++++++++++++++++++++++++++++++
> > 22 files changed, 2993 insertions(+), 51 deletions(-)
> > create mode 100644 Documentation/intro/install/afxdp.rst
> > create mode 100644 lib/netdev-afxdp.c
> > create mode 100644 lib/netdev-afxdp.h
> > create mode 100644 lib/xdpsock.c
> > create mode 100644 lib/xdpsock.h
> > create mode 100644 tests/system-afxdp-macros.at
> > create mode 100644 tests/system-afxdp-testsuite.at
> > create mode 100644 tests/system-afxdp-traffic.at
> >
> > diff --git a/Documentation/automake.mk b/Documentation/automake.mk
> > index 082438e09a33..11cc59efc881 100644
> > --- a/Documentation/automake.mk
> > +++ b/Documentation/automake.mk
> > @@ -10,6 +10,7 @@ DOC_SOURCE = \
> > Documentation/intro/why-ovs.rst \
> > Documentation/intro/install/index.rst \
> > Documentation/intro/install/bash-completion.rst \
> > + Documentation/intro/install/afxdp.rst \
> > Documentation/intro/install/debian.rst \
> > Documentation/intro/install/documentation.rst \
> > Documentation/intro/install/distributions.rst \
> > diff --git a/Documentation/index.rst b/Documentation/index.rst
> > index 46261235c732..aa9e7c49f179 100644
> > --- a/Documentation/index.rst
> > +++ b/Documentation/index.rst
> > @@ -59,6 +59,7 @@ vSwitch? Start here.
> > :doc:`intro/install/windows` |
> > :doc:`intro/install/xenserver` |
> > :doc:`intro/install/dpdk` |
> > + :doc:`intro/install/afxdp` |
> > :doc:`Installation FAQs <faq/releases>`
> >
> > - **Tutorials:** :doc:`tutorials/faucet` |
> > diff --git a/Documentation/intro/install/afxdp.rst b/Documentation/intro/install/afxdp.rst
> > new file mode 100644
> > index 000000000000..d68a4ac7ff8b
> > --- /dev/null
> > +++ b/Documentation/intro/install/afxdp.rst
> > @@ -0,0 +1,469 @@
> > +..
> > + Licensed under the Apache License, Version 2.0 (the "License"); you may
> > + not use this file except in compliance with the License. You may obtain
> > + a copy of the License at
> > +
> > + http://www.apache.org/licenses/LICENSE-2.0
> > +
> > + Unless required by applicable law or agreed to in writing, software
> > + distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
> > + WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
> > + License for the specific language governing permissions and limitations
> > + under the License.
> > +
> > + Convention for heading levels in Open vSwitch documentation:
> > +
> > + ======= Heading 0 (reserved for the title in a document)
> > + ------- Heading 1
> > + ~~~~~~~ Heading 2
> > + +++++++ Heading 3
> > + ''''''' Heading 4
> > +
> > + Avoid deeper levels because they do not render well.
> > +
> > +
> > +========================
> > +Open vSwitch with AF_XDP
> > +========================
> > +
> > +This document describes how to build and install Open vSwitch using
> > +AF_XDP netdev.
> > +
> > +.. warning::
> > + The AF_XDP support of Open vSwitch is considered 'experimental',
> > + and it is not compiled in by default.
> > +
> > +Introduction
> > +------------
> > +AF_XDP, Address Family of the eXpress Data Path, is a new Linux socket type
> > +built upon the eBPF and XDP technology. It is aims to have comparable
> > +performance to DPDK but cooperate better with existing kernel's networking
> > +stack. An AF_XDP socket receives and sends packets from an eBPF/XDP program
> > +attached to the netdev, by-passing a couple of Linux kernel's subsystems.
> > +As a result, AF_XDP socket shows much better performance than AF_PACKET.
> > +For more details about AF_XDP, please see linux kernel's
> > +Documentation/networking/af_xdp.rst
> > +
> > +
> > +AF_XDP Netdev
> > +-------------
> > +OVS has a couple of netdev types, i.e., system, tap, or
> > +internal. The AF_XDP feature adds a new netdev types called
> > +"afxdp", and implement its configuration, packet reception,
> > +and transmit functions. Since the AF_XDP socket, xsk,
> > +operates in userspace, once ovs-vswitchd receives packets
> > +from xsk, the proposed architecture re-uses the existing
> > +userspace dpif-netdev datapath. As a result, most of
> > +the packet processing happens at the userspace instead of
> > +linux kernel.
> > +
> > +::
> > +
> > + | +-------------------+
> > + | | ovs-vswitchd |<-->ovsdb-server
> > + | +-------------------+
> > + | | ofproto |<-->OpenFlow controllers
> > + | +--------+-+--------+
> > + | | netdev | |ofproto-|
> > + userspace | +--------+ | dpif |
> > + | | afxdp | +--------+
> > + | | netdev | | dpif |
> > + | +---||---+ +--------+
> > + | || | dpif- |
> > + | || | netdev |
> > + |_ || +--------+
> > + ||
> > + _ +---||-----+--------+
> > + | | AF_XDP prog + |
> > + kernel | | xsk_map |
> > + |_ +--------||---------+
> > + ||
> > + physical
> > + NIC
> > +
> > +
> > +Build requirements
> > +------------------
> > +
> > +In addition to the requirements described in :doc:`general`, building Open
> > +vSwitch with AF_XDP will require the following:
> > +
> > +- libbpf from kernel source tree (kernel 5.0.0 or later)
> > +
> > +- Linux kernel XDP support, with the following options (required)
>
> Empty line will be good here.
>
> > + ``_CONFIG_BPF=y``
> > +
> > + ``_CONFIG_BPF_SYSCALL=y``
> > +
> > + ``_CONFIG_XDP_SOCKETS=y``
>
> It also be better to make a dot list instead. Like:
>
> * item1
> * item2
>
> And why these underscores here?
I think it's a mistake, will fix it later.
>
> > +
> > +
> > +- The following optional Kconfig options are also recommended, but not
> > + required:
> > +
> > + ``_CONFIG_BPF_JIT=y`` (Performance)
> > +
> > + ``_CONFIG_HAVE_BPF_JIT=y`` (Performance)
> > +
> > + ``_CONFIG_XDP_SOCKETS_DIAG=y`` (Debugging)
> > +
Also fix the above.
> > +- If possible, run **./xdpsock -r -N -z -i <your device>** under
> > + linux/samples/bpf. This is the OVS indepedent benchmark tools for AF_XDP.
> > + It makes sure your basic kernel requirements are met for AF_XDP.
> > +
> > +
> > +Installing
> > +----------
> > +For OVS to use AF_XDP netdev, it has to be configured with LIBBPF support.
> > +Frist, clone a recent version of Linux bpf-next tree::
> > +
> > + git clone git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git
> > +
> > +Second, go into the Linux source directory and build libbpf in the tools
> > +directory::
> > +
> > + cd bpf-next/
> > + cd tools/lib/bpf/
> > + make && make install
> > + make install_headers
> > +
> > +.. note::
> > + Make sure xsk.h and bpf.h are installed in system's library path,
> > + e.g. /usr/local/include/bpf/ or /usr/include/bpf/
> > +
> > +Make sure the libbpf.so is installed correctly::
> > +
> > + ldconfig
> > + ldconfig -p | grep libbpf
> > +
> > +
> > +Third, ensure the standard OVS requirements are installed and
> > +bootstrap/configure the package::
> > +
> > + ./boot.sh && ./configure --enable-afxdp
> > +
> > +Finally, build and install OVS::
> > +
> > + make && make install
> > +
> > +To kick start end-to-end autotesting::
> > +
> > + uname -a # make sure having 5.0+ kernel
> > + make check-afxdp
> > +
> > +if a test case fails, check the log at::
> > +
> > + cat tests/system-afxdp-testsuite.dir/<number>/system-afxdp-testsuite.log
> > +
> > +
> > +Setup AF_XDP netdev
> > +-------------------
> > +Before running OVS with AF_XDP, make sure the libbpf and libelf are
> > +set-up right::
> > +
> > + ldd vswitchd/ovs-vswitchd
> > +
> > +Open vSwitch should be started using userspace datapath as described
> > +in :doc:`general`::
> > +
> > + ovs-vswitchd --disable-system
> > + ovs-vsctl -- add-br br0 -- set Bridge br0 datapath_type=netdev
> > +
> > +.. note::
> > + OVS AF_XDP netdev is using the userspace datapath, the same datapath
> > + as used by OVS-DPDK. So it requires --disable-system for ovs-vswitchd
> > + and datapath_type=netdev when adding a new bridge.
> > +
> > +Make sure your device driver support AF_XDP, and to use 1 PMD (on core 4)
> > +on 1 queue (queue 0) device, configure these options: **pmd-cpu-mask,
> > +pmd-rxq-affinity, and n_rxq**. The **xdpmode** can be "drv" or "skb"::
> > +
> > + ethtool -L enp2s0 combined 1
> > + ovs-vsctl set Open_vSwitch . other_config:pmd-cpu-mask=0x10
> > + ovs-vsctl add-port br0 enp2s0 -- set interface enp2s0 type="afxdp" \
> > + options:n_rxq=1 options:xdpmode=drv \
> > + other_config:pmd-rxq-affinity="0:4"
> > +
> > +Or, use 4 pmds/cores and 4 queues by doing::
> > +
> > + ethtool -L enp2s0 combined 4
> > + ovs-vsctl set Open_vSwitch . other_config:pmd-cpu-mask=0x36
> > + ovs-vsctl add-port br0 enp2s0 -- set interface enp2s0 type="afxdp" \
> > + options:n_rxq=4 options:xdpmode=drv \
> > + other_config:pmd-rxq-affinity="0:1,1:2,2:3,3:4"
> > +
> > +To validate that the bridge has successfully instantiated, you can use the::
> > +
> > + ovs-vsctl show
> > +
> > +should show something like::
> > +
> > + Port "ens802f0"
> > + Interface "ens802f0"
> > + type: afxdp
> > + options: {n_rxq="1", xdpmode=drv}
> > +
> > +Otherwise, enable debug by::
> > +
> > + ovs-appctl vlog/set netdev_afxdp::dbg
> > +
> > +
> > +References
> > +----------
> > +Most of the design details are described in the paper presented at
> > +Linux Plumber 2018, "Bringing the Power of eBPF to Open vSwitch"[1],
> > +section 4, and slides[2][4].
> > +"The Path to DPDK Speeds for AF XDP"[3] gives a very good introduction
> > +about AF_XDP current and future work.
> > +
> > +
> > +[1] http://vger.kernel.org/lpc_net2018_talks/ovs-ebpf-afxdp.pdf
> > +
> > +[2] http://vger.kernel.org/lpc_net2018_talks/ovs-ebpf-lpc18-presentation.pdf
> > +
> > +[3] http://vger.kernel.org/lpc_net2018_talks/lpc18_paper_af_xdp_perf-v2.pdf
> > +
> > +[4] https://ovsfall2018.sched.com/event/IO7p/fast-userspace-ovs-with-afxdp
> > +
> > +
> > +Performance Tuning
> > +------------------
> > +The name of the game is to keep your CPU running in userspace, allowing PMD
> > +to keep polling the AF_XDP queues without any interferences from kernel.
> > +
> > +#. Make sure everything is in the same NUMA node (memory used by AF_XDP, pmd
> > + running cores, device plug-in slot)
> > +
> > +#. Isolate your CPU by doing isolcpu at grub configure.
> > +
> > +#. IRQ should not set to pmd running core.
> > +
> > +#. The Spectre and Meltdown fixes increase the overhead of system calls.
> > +
> > +Debugging performance issue
> > +~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > +While running the traffic, use linux perf tool to see where your cpu
> > +spends its cycle::
> > +
> > + cd bpf-next/tools/perf
> > + make
> > + ./perf record -p `pidof ovs-vswitchd` sleep 10
> > + ./perf report
> > +
> > +Measure your system call rate by doing::
> > +
> > + pstree -p `pidof ovs-vswitchd`
> > + strace -c -p <your pmd's PID>
> > +
> > +Or, use OVS pmd tool::
> > +
> > + ovs-appctl dpif-netdev/pmd-stats-show
> > +
> > +
> > +Example Script
> > +--------------
> > +
> > +Below is a script using namespaces and veth peer::
> > +
> > + #!/bin/bash
> > + ovs-vswitchd --no-chdir --pidfile -vvconn -vofproto_dpif -vunixctl \
> > + --disable-system --detach \
> > + ovs-vsctl -- add-br br0 -- set Bridge br0 \
> > + protocols=OpenFlow10,OpenFlow11,OpenFlow12,OpenFlow13,OpenFlow14 \
> > + fail-mode=secure datapath_type=netdev
> > + ovs-vsctl -- add-br br0 -- set Bridge br0 datapath_type=netdev
> > +
> > + ip netns add at_ns0
> > + ovs-appctl vlog/set netdev_afxdp::dbg
> > +
> > + ip link add p0 type veth peer name afxdp-p0
> > + ip link set p0 netns at_ns0
> > + ip link set dev afxdp-p0 up
> > + ovs-vsctl add-port br0 afxdp-p0 -- \
> > + set interface afxdp-p0 external-ids:iface-id="p0" type="afxdp"
> > +
> > + ip netns exec at_ns0 sh << NS_EXEC_HEREDOC
> > + ip addr add "10.1.1.1/24" dev p0
> > + ip link set dev p0 up
> > + NS_EXEC_HEREDOC
> > +
> > + ip netns add at_ns1
> > + ip link add p1 type veth peer name afxdp-p1
> > + ip link set p1 netns at_ns1
> > + ip link set dev afxdp-p1 up
> > +
> > + ovs-vsctl add-port br0 afxdp-p1 -- \
> > + set interface afxdp-p1 external-ids:iface-id="p1" type="afxdp"
> > + ip netns exec at_ns1 sh << NS_EXEC_HEREDOC
> > + ip addr add "10.1.1.2/24" dev p1
> > + ip link set dev p1 up
> > + NS_EXEC_HEREDOC
> > +
> > + ip netns exec at_ns0 ping -i .2 10.1.1.2
> > +
> > +
> > +Limitations/Known Issues
> > +------------------------
> > +#. Device's numa ID is always 0, need a way to find numa id from a netdev.
> > +#. No QoS support because AF_XDP netdev by-pass the Linux TC layer. A possible
> > + work-around is to use OpenFlow meter action.
> > +#. AF_XDP device added to bridge, remove, and added again will fail.
> > +#. Most of the tests are done using i40e single port. Multiple ports and
> > + also ixgbe driver also needs to be tested.
> > +#. No latency test result (TODO items)
> > +
> > +
> > +make check-afxdp
> > +----------------
> > +When executing 'make check-afxdp', OVS creates namespaces, sets up AF_XDP on
> > +veth devices and kicks start the testing. So far we have the following test
> > +cases::
> > +
> > + AF_XDP netdev datapath-sanity
> > +
> > + 1: datapath - ping between two ports ok
> > + 2: datapath - ping between two ports on vlan ok
> > + 3: datapath - ping6 between two ports ok
> > + 4: datapath - ping6 between two ports on vlan ok
> > + 5: datapath - ping over vxlan tunnel ok
> > + 6: datapath - ping over vxlan6 tunnel ok
> > + 7: datapath - ping over gre tunnel ok
> > + 8: datapath - ping over erspan v1 tunnel ok
> > + 9: datapath - ping over erspan v2 tunnel ok
> > + 10: datapath - ping over ip6erspan v1 tunnel ok
> > + 11: datapath - ping over ip6erspan v2 tunnel ok
> > + 12: datapath - ping over geneve tunnel ok
> > + 13: datapath - ping over geneve6 tunnel ok
> > + 14: datapath - clone action ok
> > + 15: datapath - basic truncate action ok
> > +
> > + conntrack
> > +
> > + 16: conntrack - controller ok
> > + 17: conntrack - force commit ok
> > + 18: conntrack - ct flush by 5-tuple ok
> > + 19: conntrack - IPv4 ping ok
> > + 20: conntrack - get_nconns and get/set_maxconns ok
> > + 21: conntrack - IPv6 ping ok
> > +
> > + system-ovn
> > +
> > + 22: ovn -- 2 LRs connected via LS, gateway router, SNAT and DNAT ok
> > + 23: ovn -- 2 LRs connected via LS, gateway router, easy SNAT ok
> > + 24: ovn -- multiple gateway routers, SNAT and DNAT ok
> > + 25: ovn -- load-balancing ok
> > + 26: ovn -- load-balancing - same subnet. ok
> > + 27: ovn -- load balancing in gateway router ok
> > + 28: ovn -- multiple gateway routers, load-balancing ok
> > + 29: ovn -- load balancing in router with gateway router port ok
> > + 30: ovn -- DNAT and SNAT on distributed router - N/S ok
> > + 31: ovn -- DNAT and SNAT on distributed router - E/W ok
> > +
> > +PVP using tap device
> > +--------------------
> > +Assume you have enp2s0 as physical nic, and a tap device connected to VM.
> > +First, start OVS, then add physical port::
> > +
> > + ethtool -L enp2s0 combined 1
> > + ovs-vsctl set Open_vSwitch . other_config:pmd-cpu-mask=0x10
> > + ovs-vsctl add-port br0 enp2s0 -- set interface enp2s0 type="afxdp" \
> > + options:n_rxq=1 options:xdpmode=drv \
> > + other_config:pmd-rxq-affinity="0:4"
> > +
> > +Start a VM with virtio and tap device::
> > +
> > + qemu-system-x86_64 -hda ubuntu1810.qcow \
> > + -m 4096 \
> > + -cpu host,+x2apic -enable-kvm \
> > + -device virtio-net-pci,mac=00:02:00:00:00:01,netdev=net0,mq=on,\
> > + vectors=10,mrg_rxbuf=on,rx_queue_size=1024 \
> > + -netdev type=tap,id=net0,vhost=on,queues=8 \
> > + -object memory-backend-file,id=mem,size=4096M,\
> > + mem-path=/dev/hugepages,share=on \
> > + -numa node,memdev=mem -mem-prealloc -smp 2
> > +
> > +Create OpenFlow rules::
> > +
> > + ovs-vsctl add-port br0 tap0
> > + ovs-ofctl del-flows br0
> > + ovs-ofctl add-flow br0 "in_port=enp2s0, actions=output:tap0"
> > + ovs-ofctl add-flow br0 "in_port=tap0, actions=output:enp2s0"
> > +
> > +Inside the VM, use xdp_rxq_info to bounce back the traffic::
> > +
> > + ./xdp_rxq_info --dev ens3 --action XDP_TX
> > +
> > +The performance number I got is around 700Kpps.
> > +This is due to using the kernel's tap interface, which requires copying
> > +packet into kernel from the umem buffer in userspace.
> > +
> > +PVP using vhostuser device
> > +--------------------------
> > +First, build OVS with DPDK and AFXDP::
> > +
> > + ./configure --enable-afxdp --with-dpdk=<dpdk path>
> > + make -j4 && make install
> > +
> > +Create a vhost-user port from OVS::
> > +
> > + ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-init=true
> > + ovs-vsctl -- add-br br0 -- set Bridge br0 datapath_type=netdev \
> > + other_config:pmd-cpu-mask=0xfff
> > + ovs-vsctl add-port br0 vhost-user-1 \
> > + -- set Interface vhost-user-1 type=dpdkvhostuser
> > +
> > +Start VM using vhost-user mode::
> > +
> > + qemu-system-x86_64 -hda ubuntu1810.qcow \
> > + -m 4096 \
> > + -cpu host,+x2apic -enable-kvm \
> > + -chardev socket,id=char1,path=/usr/local/var/run/openvswitch/vhost-user-1 \
> > + -netdev type=vhost-user,id=mynet1,chardev=char1,vhostforce,queues=4 \
> > + -device virtio-net-pci,mac=00:00:00:00:00:01,\
> > + netdev=mynet1,mq=on,vectors=10 \
> > + -object memory-backend-file,id=mem,size=4096M,\
> > + mem-path=/dev/hugepages,share=on \
> > + -numa node,memdev=mem -mem-prealloc -smp 2
> > +
> > +Setup the OpenFlow ruls::
> > +
> > + ovs-ofctl del-flows br0
> > + ovs-ofctl add-flow br0 "in_port=enp2s0, actions=output:vhost-user-1"
> > + ovs-ofctl add-flow br0 "in_port=vhost-user-1, actions=output:enp2s0"
> > +
> > +Inside the VM, use xdp_rxq_info to drop or bounce back the traffic::
> > +
> > + ./xdp_rxq_info --dev ens3 --action XDP_DROP
> > + ./xdp_rxq_info --dev ens3 --action XDP_TX
> > +
> > +Performance: for RX_DROP: 6.6Mpps, TX: 2.3Mpps
> > +
> > +PCP container using veth
> > +------------------------
> > +Create namespace and veth peer devices::
> > +
> > + ip netns add at_ns0
> > + ip link add p0 type veth peer name afxdp-p0
> > + ip link set p0 netns at_ns0
> > + ip link set dev afxdp-p0 up
> > + ip netns exec at_ns0 ip link set dev p0 up
> > +
> > +Attach the veth port to br0::
> > +
> > + ovs-vsctl add-port br0 afxdp-p0 -- \
> > + set interface afxdp-p0 options:n_rxq=1 type="afxdp" options:xdpmode=skb
> > +
> > +Setup the OpenFlow rules::
> > +
> > + ovs-ofctl del-flows br0
> > + ovs-ofctl add-flow br0 "in_port=enp2s0, actions=output:afxdp-p0"
> > + ovs-ofctl add-flow br0 "in_port=afxdp-p0, actions=output:enp2s0"
> > +
> > +In the namespace, run drop or bounce back the packet::
> > +
> > + ip netns exec at_ns0 ./xdp_rxq_info --dev p0 --action XDP_DROP
> > +
> > +Bug Reporting
> > +-------------
> > +
> > +Please report problems to dev at openvswitch.org.
> > diff --git a/Documentation/intro/install/index.rst b/Documentation/intro/install/index.rst
> > index 3193c736cf17..c27a9c9d16ff 100644
> > --- a/Documentation/intro/install/index.rst
> > +++ b/Documentation/intro/install/index.rst
> > @@ -45,6 +45,7 @@ Installation from Source
> > xenserver
> > userspace
> > dpdk
> > + afxdp
> >
> > Installation from Packages
> > --------------------------
> > diff --git a/acinclude.m4 b/acinclude.m4
> > index b532a4579266..5782f7e4bc2e 100644
> > --- a/acinclude.m4
> > +++ b/acinclude.m4
> > @@ -221,6 +221,38 @@ AC_DEFUN([OVS_FIND_DEPENDENCY], [
> > ])
> > ])
> >
> > +dnl OVS_CHECK_LINUX_AF_XDP
> > +dnl
> > +dnl Check both Linux kernel AF_XDP and libbpf support
> > +AC_DEFUN([OVS_CHECK_LINUX_AF_XDP], [
> > + AC_ARG_ENABLE([afxdp],
> > + [AC_HELP_STRING([--enable-afxdp], [Enable AF-XDP support])],
> > + [], [enable_afxdp=no])
> > + AC_MSG_CHECKING([whether AF_XDP is enabled])
> > + if test "$enable_afxdp" != yes; then
> > + AC_MSG_RESULT([no])
> > + AF_XDP_ENABLE=false
> > + else
> > + AC_MSG_RESULT([yes])
> > + AF_XDP_ENABLE=true
> > +
> > + AC_CHECK_HEADER([bpf/libbpf.h], [],
> > + [AC_MSG_ERROR([unable to find bpf/libbpf.h for AF_XDP support])])
> > +
> > + AC_CHECK_HEADER([linux/if_xdp.h], [],
> > + [AC_MSG_ERROR([unable to find linux/if_xdp.h for AF_XDP support])])
> > +
> > + AC_CHECK_HEADER([bpf/xsk.h], [],
> > + [AC_MSG_ERROR([unable to find bpf/xsk.h for AF_XDP support])])
> > +
> > + AC_DEFINE([HAVE_AF_XDP], [1],
> > + [Define to 1 if AF_XDP support is available and enabled.])
> > + LIBBPF_LDADD=" -lbpf -lelf"
> > + AC_SUBST([LIBBPF_LDADD])
> > + fi
> > + AM_CONDITIONAL([HAVE_AF_XDP], test "$AF_XDP_ENABLE" = true)
> > +])
> > +
> > dnl OVS_CHECK_DPDK
> > dnl
> > dnl Configure DPDK source tree
> > diff --git a/configure.ac b/configure.ac
> > index 505e3d041e93..29c90b73f836 100644
> > --- a/configure.ac
> > +++ b/configure.ac
> > @@ -99,6 +99,7 @@ OVS_CHECK_SPHINX
> > OVS_CHECK_DOT
> > OVS_CHECK_IF_DL
> > OVS_CHECK_STRTOK_R
> > +OVS_CHECK_LINUX_AF_XDP
> > AC_CHECK_DECLS([sys_siglist], [], [], [[#include <signal.h>]])
> > AC_CHECK_MEMBERS([struct stat.st_mtim.tv_nsec, struct stat.st_mtimensec],
> > [], [], [[#include <sys/stat.h>]])
> > diff --git a/lib/automake.mk b/lib/automake.mk
> > index cc5dccf39d6b..e3c1d9cbf363 100644
> > --- a/lib/automake.mk
> > +++ b/lib/automake.mk
> > @@ -14,6 +14,10 @@ if WIN32
> > lib_libopenvswitch_la_LIBADD += ${PTHREAD_LIBS}
> > endif
> >
> > +if HAVE_AF_XDP
> > +lib_libopenvswitch_la_LIBADD += $(LIBBPF_LDADD)
> > +endif
> > +
> > lib_libopenvswitch_la_LDFLAGS = \
> > $(OVS_LTINFO) \
> > -Wl,--version-script=$(top_builddir)/lib/libopenvswitch.sym \
> > @@ -409,6 +413,14 @@ lib_libopenvswitch_la_SOURCES += \
> > lib/tc.h
> > endif
> >
> > +if HAVE_AF_XDP
> > +lib_libopenvswitch_la_SOURCES += \
> > + lib/xdpsock.c \
> > + lib/xdpsock.h \
> > + lib/netdev-afxdp.c \
> > + lib/netdev-afxdp.h
> > +endif
> > +
> > if DPDK_NETDEV
> > lib_libopenvswitch_la_SOURCES += \
> > lib/dpdk.c \
> > diff --git a/lib/dp-packet.c b/lib/dp-packet.c
> > index 0976a35e758b..c50f88e6e056 100644
> > --- a/lib/dp-packet.c
> > +++ b/lib/dp-packet.c
> > @@ -22,6 +22,9 @@
> > #include "netdev-dpdk.h"
> > #include "openvswitch/dynamic-string.h"
> > #include "util.h"
> > +#ifdef HAVE_AF_XDP
> > +#include "netdev-afxdp.h"
> > +#endif
> >
> > static void
> > dp_packet_init__(struct dp_packet *b, size_t allocated, enum dp_packet_source source)
> > @@ -122,6 +125,11 @@ dp_packet_uninit(struct dp_packet *b)
> > * created as a dp_packet */
> > free_dpdk_buf((struct dp_packet*) b);
> > #endif
> > + } else if (b->source == DPBUF_AFXDP) {
> > +#ifdef HAVE_AF_XDP
> > + free_afxdp_buf(b);
> > +#endif
> > + return;
> > }
> > }
> > }
> > @@ -248,6 +256,9 @@ dp_packet_resize__(struct dp_packet *b, size_t new_headroom, size_t new_tailroom
> > case DPBUF_STACK:
> > OVS_NOT_REACHED();
> >
> > + case DPBUF_AFXDP:
> > + OVS_NOT_REACHED();
> > +
> > case DPBUF_STUB:
> > b->source = DPBUF_MALLOC;
> > new_base = xmalloc(new_allocated);
> > @@ -433,6 +444,7 @@ dp_packet_steal_data(struct dp_packet *b)
> > {
> > void *p;
> > ovs_assert(b->source != DPBUF_DPDK);
> > + ovs_assert(b->source != DPBUF_AFXDP);
> >
> > if (b->source == DPBUF_MALLOC && dp_packet_data(b) == dp_packet_base(b)) {
> > p = dp_packet_data(b);
> > diff --git a/lib/dp-packet.h b/lib/dp-packet.h
> > index a5e9ade1244a..91dcb886899f 100644
> > --- a/lib/dp-packet.h
> > +++ b/lib/dp-packet.h
> > @@ -25,6 +25,10 @@
> > #include <rte_mbuf.h>
> > #endif
> >
> > +#ifdef HAVE_AF_XDP
> > +#include "netdev-afxdp.h"
> > +#endif
> > +
> > #include "netdev-dpdk.h"
> > #include "openvswitch/list.h"
> > #include "packets.h"
> > @@ -42,6 +46,7 @@ enum OVS_PACKED_ENUM dp_packet_source {
> > DPBUF_DPDK, /* buffer data is from DPDK allocated memory.
> > * ref to dp_packet_init_dpdk() in dp-packet.c.
> > */
> > + DPBUF_AFXDP, /* buffer data from XDP frame */
> > };
> >
> > #define DP_PACKET_CONTEXT_SIZE 64
> > @@ -89,6 +94,13 @@ struct dp_packet {
> > };
> > };
> >
> > +#if HAVE_AF_XDP
> > +struct dp_packet_afxdp {
> > + struct umem_pool *mpool;
> > + struct dp_packet packet;
> > +};
> > +#endif
> > +
> > static inline void *dp_packet_data(const struct dp_packet *);
> > static inline void dp_packet_set_data(struct dp_packet *, void *);
> > static inline void *dp_packet_base(const struct dp_packet *);
> > @@ -184,6 +196,12 @@ dp_packet_delete(struct dp_packet *b)
> > return;
> > }
> >
> > +#ifdef HAVE_AF_XDP
> > + if (b->source == DPBUF_AFXDP) {
> > + free_afxdp_buf((struct dp_packet *)b);
>
> I think that pointer cast is not needed here. BTW, I don't know
> why it exists for dpdk case above.
right, thanks.
>
> > + return;
> > + }
> > +#endif
> > dp_packet_uninit(b);
> > free(b);
> > }
> > diff --git a/lib/dpif-netdev-perf.h b/lib/dpif-netdev-perf.h
> > index 859c05613ddf..cc91720fad6e 100644
> > --- a/lib/dpif-netdev-perf.h
> > +++ b/lib/dpif-netdev-perf.h
> > @@ -198,6 +198,20 @@ cycles_counter_update(struct pmd_perf_stats *s)
> > {
> > #ifdef DPDK_NETDEV
> > return s->last_tsc = rte_get_tsc_cycles();
> > +#elif HAVE_AF_XDP
> > + /* This is x86-specific instructions. */
> > + union {
> > + uint64_t tsc_64;
> > + struct {
> > + uint32_t lo_32;
> > + uint32_t hi_32;
> > + };
> > + } tsc;
> > + asm volatile("rdtsc" :
> > + "=a" (tsc.lo_32),
> > + "=d" (tsc.hi_32));
> > +
> > + return s->last_tsc = tsc.tsc_64;
> > #else
> > return s->last_tsc = 0;
> > #endif
> > diff --git a/lib/netdev-afxdp.c b/lib/netdev-afxdp.c
> > new file mode 100644
> > index 000000000000..48de4eaaeed3
> > --- /dev/null
> > +++ b/lib/netdev-afxdp.c
> > @@ -0,0 +1,698 @@
> > +/*
> > + * Copyright (c) 2018, 2019 Nicira, Inc.
> > + *
> > + * Licensed under the Apache License, Version 2.0 (the "License");
> > + * you may not use this file except in compliance with the License.
> > + * You may obtain a copy of the License at:
> > + *
> > + * http://www.apache.org/licenses/LICENSE-2.0
> > + *
> > + * Unless required by applicable law or agreed to in writing, software
> > + * distributed under the License is distributed on an "AS IS" BASIS,
> > + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
> > + * See the License for the specific language governing permissions and
> > + * limitations under the License.
> > + */
> > +
> > +#if !defined(__i386__) && !defined(__x86_64__)
> > +#error AF_XDP supported only for Linux on x86 or x86_64
> > +#endif
> > +
> > +#include <config.h>
>
> Some space here.
>
> > +#include "netdev-linux.h"
>
> And here.
OK, will fix it.
>
> > +#include <errno.h>
> > +#include <fcntl.h>
> > +#include <sys/types.h>
> > +#include <netinet/in.h>
> > +#include <arpa/inet.h>
> > +#include <inttypes.h>
> > +#include <sys/ioctl.h>
> > +#include <sys/socket.h>
> > +#include <sys/utsname.h>
> > +#include <netpacket/packet.h>
> > +#include <net/if.h>
> > +#include <net/if_arp.h>
> > +#include <net/route.h>
> > +#include <poll.h>
> > +#include <stdlib.h>
> > +#include <string.h>
> > +#include <unistd.h>
> > +
> > +#include "coverage.h"
> > +#include "dp-packet.h"
> > +#include "dpif-netlink.h"
> > +#include "dpif-netdev.h"
> > +#include "openvswitch/dynamic-string.h"
> > +#include "fatal-signal.h"
> > +#include "hash.h"
> > +#include "openvswitch/hmap.h"
> > +#include "netdev-provider.h"
> > +#include "netdev-tc-offloads.h"
> > +#include "netdev-vport.h"
> > +#include "netlink-notifier.h"
> > +#include "netlink-socket.h"
> > +#include "netlink.h"
> > +#include "netnsid.h"
> > +#include "openvswitch/ofpbuf.h"
> > +#include "openflow/openflow.h"
> > +#include "ovs-atomic.h"
> > +#include "packets.h"
> > +#include "openvswitch/poll-loop.h"
> > +#include "rtnetlink.h"
> > +#include "openvswitch/shash.h"
> > +#include "socket-util.h"
> > +#include "sset.h"
> > +#include "tc.h"
> > +#include "timer.h"
> > +#include "unaligned.h"
> > +#include "openvswitch/vlog.h"
> > +#include "util.h"
> > +#include "netdev-afxdp.h"
>
> Above header should be at the top, near to 'netdev-linux'.
>
> > +
> > +#include <linux/if_ether.h>
> > +#include <linux/if_tun.h>
> > +#include <linux/types.h>
> > +#include <linux/ethtool.h>
> > +#include <linux/mii.h>
> > +#include <linux/rtnetlink.h>
> > +#include <linux/sockios.h>
> > +#include <linux/if_xdp.h>
> > +#include "xdpsock.h"
>
> All above headers should be within corresponding blocks.
> i.e. system headers along with system headers, ovs headers
> with ovs headers above. In lexicographical order, if possible.
>
Thanks, I will also check other places.
> > +
> > +#ifndef SOL_XDP
> > +#define SOL_XDP 283
> > +#endif
> > +#ifndef AF_XDP
> > +#define AF_XDP 44
> > +#endif
> > +#ifndef PF_XDP
> > +#define PF_XDP AF_XDP
> > +#endif
> > +
> > +VLOG_DEFINE_THIS_MODULE(netdev_afxdp);
> > +static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
> > +
> > +#define UMEM2DESC(elem, base) ((uint64_t)((char *)elem - (char *)base))
> > +#define UMEM2XPKT(base, i) \
> > + ALIGNED_CAST(struct dp_packet_afxdp *, (char *)base + \
> > + i * sizeof(struct dp_packet_afxdp))
>
> Please, align this line to the first parenthesis.
OK.
>
> > +
> > +static uint32_t prog_id;
> > +static struct xsk_socket_info *xsk_configure(int ifindex, int xdp_queue_id,
> > + int mode);
> > +static void xsk_remove_xdp_program(uint32_t ifindex, int xdpmode);
> > +static void xsk_destroy(struct xsk_socket_info *xsk);
> > +
> > +static struct xsk_umem_info *xsk_configure_umem(void *buffer, uint64_t size,
> > + int xdpmode)
> > +{
> > + struct xsk_umem_info *umem;
> > + int ret;
> > + int i;
> > +
> > + umem = xcalloc(1, sizeof(*umem));
> > + ret = xsk_umem__create(&umem->umem, buffer, size, &umem->fq, &umem->cq,
> > + NULL);
> > +
> > + if (ret) {
> > + VLOG_ERR("xsk umem create failed (%s) mode: %s",
> > + ovs_strerror(errno),
> > + xdpmode == XDP_COPY ? "SKB": "DRV");
>
> free(umem);
Right, thanks!
>
> > + return NULL;
> > + }
> > +
> > + umem->buffer = buffer;
> > +
> > + /* set-up umem pool */
> > + umem_pool_init(&umem->mpool, NUM_FRAMES);
> > +
> > + for (i = NUM_FRAMES - 1; i >= 0; i--) {
> > + struct umem_elem *elem;
> > +
> > + elem = ALIGNED_CAST(struct umem_elem *,
> > + (char *)umem->buffer + i * FRAME_SIZE);
> > + umem_elem_push(&umem->mpool, elem);
> > + }
> > +
> > + /* set-up metadata */
> > + xpacket_pool_init(&umem->xpool, NUM_FRAMES);
> > +
> > + VLOG_DBG("%s xpacket pool from %p to %p", __func__,
> > + umem->xpool.array,
> > + (char *)umem->xpool.array +
> > + NUM_FRAMES * sizeof(struct dp_packet_afxdp));
> > +
> > + for (i = NUM_FRAMES - 1; i >= 0; i--) {
> > + struct dp_packet_afxdp *xpacket;
> > + struct dp_packet *packet;
> > +
> > + xpacket = UMEM2XPKT(umem->xpool.array, i);
> > + xpacket->mpool = &umem->mpool;
> > +
> > + packet = &xpacket->packet;
> > + packet->source = DPBUF_AFXDP;
> > + }
> > +
> > + return umem;
> > +}
> > +
> > +static struct xsk_socket_info *
> > +xsk_configure_socket(struct xsk_umem_info *umem, uint32_t ifindex,
> > + uint32_t queue_id, int xdpmode)
> > +{
> > + struct xsk_socket_config cfg;
> > + struct xsk_socket_info *xsk;
> > + char devname[IF_NAMESIZE];
> > + uint32_t idx = 0;
> > + int ret;
> > + int i;
> > +
> > + xsk = xcalloc(1, sizeof(*xsk));
> > + xsk->umem = umem;
> > + cfg.rx_size = CONS_NUM_DESCS;
> > + cfg.tx_size = PROD_NUM_DESCS;
> > + cfg.libbpf_flags = 0;
> > +
> > + if (xdpmode == XDP_ZEROCOPY) {
> > + cfg.bind_flags = XDP_ZEROCOPY;
> > + cfg.xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST | XDP_FLAGS_DRV_MODE;
> > + } else {
> > + cfg.bind_flags = XDP_COPY;
> > + cfg.xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST | XDP_FLAGS_SKB_MODE;
> > + }
> > +
> > + if (if_indextoname(ifindex, devname) == NULL) {
> > + VLOG_ERR("ifindex %d to devname failed (%s)",
> > + ifindex, ovs_strerror(errno));
>
> free(xsk);
>
> > + return NULL;
> > + }
> > +
> > + ret = xsk_socket__create(&xsk->xsk, devname, queue_id, umem->umem,
> > + &xsk->rx, &xsk->tx, &cfg);
> > + if (ret) {
> > + VLOG_ERR("xsk_socket_create failed (%s) mode: %s qid: %d",
> > + ovs_strerror(errno),
> > + xdpmode == XDP_COPY ? "SKB": "DRV",
> > + queue_id);
>
> free(xsk);
Right, thanks!
>
> > + return NULL;
> > + }
> > +
> > + /* Make sure the built-in AF_XDP program is loaded */
> > + ret = bpf_get_link_xdp_id(ifindex, &prog_id, cfg.xdp_flags);
> > + if (ret) {
> > + VLOG_ERR("get XDP prog ID failed (%s)", ovs_strerror(errno));
> > + xsk_socket__delete(xsk->xsk);
>
> xsk_socket__delete(xsk->xsk);
> free(xsk);
>
Right, thanks!
> > + return NULL;
> > + }
> > +
> > + xsk_ring_prod__reserve(&xsk->umem->fq, PROD_NUM_DESCS, &idx);
> > +
> > + for (i = 0;
> > + i < PROD_NUM_DESCS * FRAME_SIZE;
> > + i += FRAME_SIZE) {
> > + struct umem_elem *elem;
> > + uint64_t addr;
> > +
> > + elem = umem_elem_pop(&xsk->umem->mpool);
> > + addr = UMEM2DESC(elem, xsk->umem->buffer);
> > +
> > + *xsk_ring_prod__fill_addr(&xsk->umem->fq, idx++) = addr;
> > + }
> > +
> > + xsk_ring_prod__submit(&xsk->umem->fq,
> > + PROD_NUM_DESCS);
> > + return xsk;
> > +}
> > +
> > +static struct xsk_socket_info *
> > +xsk_configure(int ifindex, int xdp_queue_id, int xdpmode)
> > +{
> > + struct xsk_socket_info *xsk;
> > + struct xsk_umem_info *umem;
> > + void *bufs;
> > + int ret;
> > +
> > + /* umem memory region */
> > + ret = posix_memalign(&bufs, getpagesize(),
> > + NUM_FRAMES * FRAME_SIZE);
> > + memset(bufs, 0, NUM_FRAMES * FRAME_SIZE);
> > + ovs_assert(!ret);
> > +
> > + /* create AF_XDP socket */
> > + umem = xsk_configure_umem(bufs,
> > + NUM_FRAMES * FRAME_SIZE,
> > + xdpmode);
> > + if (!umem) {
>
> free(bufs);
>
> > + return NULL;
> > + }
> > +
> > + xsk = xsk_configure_socket(umem, ifindex, xdp_queue_id, xdpmode);
> > + if (!xsk) {
> > + /* clean up umem and xpacket pool */
> > + free(bufs);
> > + (void)xsk_umem__delete(umem->umem);
>
> 'umem' created on 'bufs', so you need to delete 'umem' before
> freeing the 'bufs'.
>
> > + umem_pool_cleanup(&xsk->umem->mpool);
> > + xpacket_pool_cleanup(&xsk->umem->xpool);
>
> There is no xsk here:
>
> umem_pool_cleanup(&umem->mpool);
> xpacket_pool_cleanup(&umem->xpool);
>
> And:
>
> free(umem);
good catch, thanks.
>
> > + }
> > + return xsk;
> > +}
> > +
> > +void
> > +xsk_configure_all(struct netdev *netdev)
> > +{
> > + struct netdev_linux *dev = netdev_linux_cast(netdev);
> > + struct xsk_socket_info *xsk;
> > + int i, ifindex;
> > +
> > + ifindex = linux_get_ifindex(netdev->name);
> > +
> > + /* configure each queue */
> > + for (i = 0; i < netdev->n_rxq; i++) {
> > + VLOG_INFO("%s configure queue %d mode %s", __func__, i,
> > + dev->xdpmode == XDP_COPY ? "SKB" : "DRV");
>
> Please, align to the first parenthesis.
Right, thanks!
>
> > + xsk = xsk_configure(ifindex, i, dev->xdpmode);
> > + if (!xsk) {
> > + VLOG_ERR("failed to create AF_XDP socket on queue %d", i);
>
> Need to destroy sockets that was configured.
>
> > + return;
>
> We also need to return the error and check the result in caller functions.
OK, will fix it in next version.
>
> > + }
> > + dev->xsk[i] = xsk;
> > + }
> > +}
> > +
> > +static void OVS_UNUSED vlog_hex_dump(const void *buf, size_t count)
> > +{
> > + struct ds ds = DS_EMPTY_INITIALIZER;
> > + ds_put_hex_dump(&ds, buf, count, 0, false);
> > + VLOG_DBG_RL(&rl, "%s", ds_cstr(&ds));
> > + ds_destroy(&ds);
> > +}
> > +
> > +static void
> > +xsk_destroy(struct xsk_socket_info *xsk)
> > +{
> > + struct xsk_umem *umem;
> > +
> > + if (!xsk) {
> > + return;
> > + }
> > +
> > + umem = xsk->umem->umem;
> > + xsk_socket__delete(xsk->xsk);
> > + (void)xsk_umem__delete(umem);
> > +
> > + /* free the packet buffer */
> > + free(xsk->umem->buffer);
> > +
> > + /* cleanup umem pool */
> > + umem_pool_cleanup(&xsk->umem->mpool);
> > +
> > + /* cleanup metadata pool */
> > + xpacket_pool_cleanup(&xsk->umem->xpool);
>
> free(xsk->umem);
> free(xsk);
Right, thanks!
>
> > +}
> > +
> > +void
> > +xsk_destroy_all(struct netdev *netdev)
> > +{
> > + struct netdev_linux *dev = netdev_linux_cast(netdev);
> > + int i, ifindex;
> > +
> > + ifindex = linux_get_ifindex(netdev->name);
> > +
> > + for (i = 0; i < MAX_XSKQ; i++) {
> > + if (dev->xsk[i]) {
> > + VLOG_INFO("destroy xsk[%d]", i);
> > + xsk_destroy(dev->xsk[i]);
>
> dev->xsk[i] = NULL;
> To avoid double destroy on multiple reconfigurations.
good point, thanks.
>
> > + }
> > + }
> > + VLOG_INFO("remove xdp program");
> > + xsk_remove_xdp_program(ifindex, dev->xdpmode);
> > +}
> > +
> > +static inline void OVS_UNUSED
> > +print_xsk_stat(struct xsk_socket_info *xsk OVS_UNUSED) {
> > + struct xdp_statistics stat;
> > + socklen_t optlen;
> > +
> > + optlen = sizeof stat;
> > + ovs_assert(getsockopt(xsk_socket__fd(xsk->xsk), SOL_XDP, XDP_STATISTICS,
> > + &stat, &optlen) == 0);
>
> Please, align to arguments of 'getsockopt'.
Right, thanks!
>
> > +
> > + VLOG_DBG_RL(&rl, "rx dropped %llu, rx_invalid %llu, tx_invalid %llu",
> > + stat.rx_dropped,
> > + stat.rx_invalid_descs,
> > + stat.tx_invalid_descs);
> > +}
> > +
> > +int
> > +netdev_afxdp_set_config(struct netdev *netdev, const struct smap *args,
> > + char **errp OVS_UNUSED)
> > +{
> > + struct netdev_linux *dev = netdev_linux_cast(netdev);
> > + struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
> > + const char *xdpmode;
> > + int new_n_rxq;
> > +
> > + ovs_mutex_lock(&dev->mutex);
> > +
> > + new_n_rxq = MAX(smap_get_int(args, "n_rxq", NR_QUEUE), 1);
> > + if (new_n_rxq > MAX_XSKQ) {
> > + ovs_mutex_unlock(&dev->mutex);
> > + return EINVAL;
> > + }
> > +
> > + if (new_n_rxq != netdev->n_rxq) {
> > + dev->requested_n_rxq = new_n_rxq;
> > + netdev_request_reconfigure(netdev);
> > + }
> > +
> > + xdpmode = smap_get(args, "xdpmode");
> > + if (xdpmode && strncmp(xdpmode, "drv", 3) == 0) {
> > + dev->requested_xdpmode = XDP_ZEROCOPY;
> > +
> > + if (dev->xdpmode != dev->requested_xdpmode) {
> > + VLOG_INFO("AF_XDP device %s in DRV mode", netdev->name);
> > +
> > + /* From SKB mode to DRV mode */
> > + dev->xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST | XDP_FLAGS_DRV_MODE;
> > + dev->xdp_bind_flags = XDP_ZEROCOPY;
> > + dev->xdpmode = XDP_ZEROCOPY;
>
> Some of these flags are used while device destruction. Also, they are used
> while reporting the current device status. So, we should not update them
> before the actual reconfiguration. This should be done after the xsk_destroy_all().
> Same for the 'else' case and the 'setrlimit'.
yes, I will fix this in next version.
>
> > + netdev_request_reconfigure(netdev);
> > + }
> > + } else {
> > + dev->requested_xdpmode = XDP_COPY;
> > + if (dev->xdpmode != dev->requested_xdpmode) {
> > + VLOG_INFO("AF_XDP device %s in SKB mode", netdev->name);
> > +
> > + /* From DRV mode to SKB mode */
> > + dev->xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST | XDP_FLAGS_SKB_MODE;
> > + dev->xdp_bind_flags = XDP_COPY;
> > + dev->xdpmode = XDP_COPY;
> > + netdev_request_reconfigure(netdev);
> > + }
> > + }
> > +
> > + if (dev->xdpmode == XDP_ZEROCOPY) {
> > + if (setrlimit(RLIMIT_MEMLOCK, &r)) {
> > + VLOG_ERR("ERROR: setrlimit(RLIMIT_MEMLOCK) \"%s\"\n",
> > + ovs_strerror(errno));
> > + }
> > + }
> > +
> > + ovs_mutex_unlock(&dev->mutex);
> > + return 0;
> > +}
> > +
> > +int
> > +netdev_afxdp_get_config(const struct netdev *netdev, struct smap *args)
> > +{
> > + struct netdev_linux *dev = netdev_linux_cast(netdev);
> > +
> > + ovs_mutex_lock(&dev->mutex);
> > + smap_add_format(args, "n_rxq", "%d", netdev->n_rxq);
> > + smap_add_format(args, "xdpmode", "%s",
> > + dev->xdp_bind_flags == XDP_ZEROCOPY ? "drv" : "skb");
> > + ovs_mutex_unlock(&dev->mutex);
> > + return 0;
> > +}
> > +
> > +int
> > +netdev_afxdp_reconfigure(struct netdev *netdev)
> > +{
> > + struct netdev_linux *dev = netdev_linux_cast(netdev);
> > + int err = 0;
> > +
> > + ovs_mutex_lock(&dev->mutex);
> > +
> > + if (netdev->n_rxq == dev->requested_n_rxq
> > + && dev->xdpmode == dev->requested_xdpmode) {
> > + goto out;
> > + }
> > +
> > + xsk_destroy_all(netdev);
> > +
> > + netdev->n_rxq = dev->requested_n_rxq;
> > + dev->xdpmode = dev->requested_xdpmode;
> > +
> > + xsk_configure_all(netdev);
>
> Need to get the actual status of xsk_configure_all() and set the 'err'
> accordingly to avoid using broken device.
>
> Another thought is that destroy/configure of each xsk should be implemented
> as rxq_construct/destruct() callbacks, so the datapath will handle rxqs, i.e.
> open and close them when needed. But this could be implemented later.
OK, I will implement this later.
>
> > + netdev_change_seq_changed(netdev);
> > +out:
> > + ovs_mutex_unlock(&dev->mutex);
> > + return err;
> > +}
> > +
> > +int
> > +netdev_afxdp_get_numa_id(const struct netdev *netdev)
> > +{
> > + /* FIXME: Get netdev's PCIe device ID, then find
> > + * its NUMA node id.
> > + */
> > + VLOG_INFO("FIXME: Device %s always use numa id 0", netdev->name);
>
> s/netdev->name/netdev_get_name(netdev)/g
>
> For all the other places in the code.
Right, thanks!
>
> > + return 0;
> > +}
> > +
> > +void
> > +xsk_remove_xdp_program(uint32_t ifindex, int xdpmode)
> > +{
> > + uint32_t curr_prog_id = 0;
> > + uint32_t flags;
> > +
> > + /* remove_xdp_program() */
> > + if (xdpmode == XDP_COPY) {
> > + flags = XDP_FLAGS_UPDATE_IF_NOEXIST | XDP_FLAGS_SKB_MODE;
> > + } else {
> > + flags = XDP_FLAGS_UPDATE_IF_NOEXIST | XDP_FLAGS_DRV_MODE;
> > + }
> > +
> > + if (bpf_get_link_xdp_id(ifindex, &curr_prog_id, flags)) {
> > + bpf_set_link_xdp_fd(ifindex, -1, flags);
> > + }
> > + if (prog_id == curr_prog_id) {
> > + bpf_set_link_xdp_fd(ifindex, -1, flags);
> > + } else if (!curr_prog_id) {
> > + VLOG_INFO("couldn't find a prog id on a given interface");
> > + } else {
> > + VLOG_INFO("program on interface changed, not removing");
> > + }
> > +}
> > +
> > +static inline struct dp_packet_afxdp *
> > +dp_packet_cast_afxdp(const struct dp_packet *d OVS_UNUSED)
>
> 'd' is not UNUSED.
Right, thanks!
>
> > +{
> > + ovs_assert(d->source == DPBUF_AFXDP);
> > + return CONTAINER_OF(d, struct dp_packet_afxdp, packet);
> > +}
> > +
> > +void
> > +free_afxdp_buf(struct dp_packet *p)
> > +{
> > + struct dp_packet_afxdp *xpacket;
> > + unsigned long addr;
> > +
> > + xpacket = dp_packet_cast_afxdp(p);
> > + if (xpacket->mpool) {
> > + void *base = dp_packet_base(p);
> > +
> > + addr = (unsigned long)base & (~FRAME_SHIFT_MASK);
> > + umem_elem_push(xpacket->mpool, (void *)addr);
> > + }
> > +}
> > +
> > +void
> > +free_afxdp_buf_batch(struct dp_packet_batch *batch)
> > +{
> > + struct dp_packet_afxdp *xpacket = NULL;
> > + struct dp_packet *packet;
> > + void *elems[BATCH_SIZE];
> > + unsigned long addr;
> > +
> > + /* all packets are AF_XDP, so handles its own delete in batch */
> > + DP_PACKET_BATCH_FOR_EACH (i, packet, batch) {
> > + xpacket = dp_packet_cast_afxdp(packet);
> > + if (xpacket->mpool) {
> > + void *base = dp_packet_base(packet);
> > +
> > + addr = (unsigned long)base & (~FRAME_SHIFT_MASK);
> > + elems[i] = (void *)addr;
> > + }
> > + }
> > + umem_elem_push_n(xpacket->mpool, batch->count, elems);
> > + dp_packet_batch_init(batch);
> > +}
> > +
> > +/* Receive packet from AF_XDP socket */
> > +int
> > +netdev_linux_rxq_xsk(struct xsk_socket_info *xsk,
> > + struct dp_packet_batch *batch)
> > +{
> > + struct umem_elem *elems[BATCH_SIZE];
> > + uint32_t idx_rx = 0, idx_fq = 0;
> > + unsigned int rcvd, i;
> > + int ret = 0;
> > +
> > + /* See if there is any packet on RX queue,
> > + * if yes, idx_rx is the index having the packet.
> > + */
> > + rcvd = xsk_ring_cons__peek(&xsk->rx, BATCH_SIZE, &idx_rx);
> > + if (!rcvd) {
> > + return 0;
> > + }
> > +
> > + /* Form a dp_packet batch from descriptor in RX queue */
> > + for (i = 0; i < rcvd; i++) {
> > + uint64_t addr = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx)->addr;
> > + uint32_t len = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx)->len;
> > + char *pkt = xsk_umem__get_data(xsk->umem->buffer, addr);
> > + uint64_t index;
> > +
> > + struct dp_packet_afxdp *xpacket;
> > + struct dp_packet *packet;
> > +
> > + index = addr >> FRAME_SHIFT;
> > + xpacket = UMEM2XPKT(xsk->umem->xpool.array, index);
> > +
> > + packet = &xpacket->packet;
> > + xpacket->mpool = &xsk->umem->mpool;
> > +
> > + /* Initialize the struct dp_packet */
> > + dp_packet_set_base(packet, pkt);
> > + dp_packet_set_data(packet, pkt);
> > + dp_packet_set_size(packet, len);
>
> There must be some more work done. We need to clear all the data
> that left from the previous packets.
>
> You may initialize source and call dp_packet_init_specific() on xpool
> initialization, but base, data, size, packet_type, cutlen and offload
> flags should be initialized for each packet.
>
> You probably may implement your own dp_packet_use_afxdp() for this.
good idea. I will add it to my next version.
>
> > +
> > + /* Add packet into batch, increase batch->count */
> > + dp_packet_batch_add(batch, packet);
> > +
> > + idx_rx++;
> > + }
> > +
> > + /* We've consume rcvd packets in RX, now re-fill the
> > + * same number back to FILL queue.
> > + */
> > + ret = umem_elem_pop_n(&xsk->umem->mpool, rcvd, (void **)elems);
> > + if (OVS_UNLIKELY(ret)) {
> > + return -ENOMEM;
> > + }
> > +
> > + for (i = 0; i < rcvd; i++) {
> > + uint64_t index;
> > + struct umem_elem *elem;
> > +
> > + ret = xsk_ring_prod__reserve(&xsk->umem->fq, 1, &idx_fq);
> > + while (OVS_UNLIKELY(ret == 0)) {
> > + /* The FILL queue is full, so retry. (or skip)? */
> > + ret = xsk_ring_prod__reserve(&xsk->umem->fq, 1, &idx_fq);
> > + }
> > +
> > + /* Get one free umem, program it into FILL queue */
> > + elem = elems[i];
> > + index = (uint64_t)((char *)elem - (char *)xsk->umem->buffer);
> > + ovs_assert((index & FRAME_SHIFT_MASK) == 0);
> > + *xsk_ring_prod__fill_addr(&xsk->umem->fq, idx_fq) = index;
> > +
> > + idx_fq++;
> > + }
> > + xsk_ring_prod__submit(&xsk->umem->fq, rcvd);
> > +
> > + /* Release the RX queue */
> > + xsk_ring_cons__release(&xsk->rx, rcvd);
> > + xsk->rx_npkts += rcvd;
> > +
> > +#ifdef AFXDP_DEBUG
> > + print_xsk_stat(xsk);
> > +#endif
> > + return 0;
> > +}
> > +
> > +static void kick_tx(struct xsk_socket_info *xsk)
> > +{
> > + int ret;
> > +
> > + /* This causes system call into kernel, avoid calling
> > + * this as much as we can.
> > + */
> > + ret = sendto(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, 0);
> > + if (ret >= 0 || errno == ENOBUFS || errno == EAGAIN || errno == EBUSY) {
> > + return;
>
> This makes no much sense. Did you want to print something on error?
Right, will fix it in next version.
>
> > + }
> > +}
> > +
> > +int
> > +netdev_linux_afxdp_batch_send(struct xsk_socket_info *xsk,
> > + struct dp_packet_batch *batch)
> > +{
> > + struct umem_elem *elems_pop[BATCH_SIZE];
> > + struct umem_elem *elems_push[BATCH_SIZE];
> > + uint32_t tx_done, idx_cq = 0;
> > + struct dp_packet *packet;
> > + uint32_t idx = 0;
> > + int j, ret;
> > +
> > + /* Make sure we have enough TX descs */
> > + ret = xsk_ring_prod__reserve(&xsk->tx, batch->count, &idx);
> > + if (OVS_UNLIKELY(ret == 0)) {
> > + return -EAGAIN;
> > + }
> > +
> > + ret = umem_elem_pop_n(&xsk->umem->mpool, batch->count, (void **)elems_pop);
> > + if (OVS_UNLIKELY(ret)) {
> > + return -EAGAIN;
> > + }
>
> We should probably make umem_elem_pop_n() first before the
> xsk_ring_prod__reserve(), because we can't undo the xsk_ring_prod__reserve(),
> but we can push umem_elems back in case of xsk_ring_prod__reserve() failure.
>
Right, thanks!
> > +
> > + DP_PACKET_BATCH_FOR_EACH (i, packet, batch) {
> > + struct umem_elem *elem;
> > + uint64_t index;
> > +
> > + elem = elems_pop[i];
> > + if (OVS_UNLIKELY(!elem)) {
> > + return -EAGAIN;
> > + }
> > +
> > + /* Copy the packet to the umem we just pop from umem pool.
> > + * We can avoid this copy if the packet and the pop umem
> > + * are located in the same umem.
> > + */
> > + memcpy(elem, dp_packet_data(packet), dp_packet_size(packet));
> > +
> > + index = (uint64_t)((char *)elem - (char *)xsk->umem->buffer);
> > + xsk_ring_prod__tx_desc(&xsk->tx, idx + i)->addr = index;
> > + xsk_ring_prod__tx_desc(&xsk->tx, idx + i)->len
> > + = dp_packet_size(packet);
> > + }
> > + xsk_ring_prod__submit(&xsk->tx, batch->count);
> > + xsk->outstanding_tx += batch->count;
> > +
> > + kick_tx(xsk);
> > +retry:
> > +
> > + /* Process CQ */
> > + tx_done = xsk_ring_cons__peek(&xsk->umem->cq, batch->count, &idx_cq);
> > + if (tx_done > 0) {
> > + xsk->outstanding_tx -= tx_done;
> > + xsk->tx_npkts += tx_done;
> > + }
> > +
> > + /* Recycle back to umem pool */
> > + for (j = 0; j < tx_done; j++) {
> > + struct umem_elem *elem;
> > + uint64_t addr;
> > +
> > + addr = *xsk_ring_cons__comp_addr(&xsk->umem->cq, idx_cq++);
> > +
> > + elem = ALIGNED_CAST(struct umem_elem *,
> > + (char *)xsk->umem->buffer + addr);
> > + elems_push[j] = elem;
> > + }
> > + ret = umem_elem_push_n(&xsk->umem->mpool, tx_done, (void **)elems_push);
> > + if (OVS_UNLIKELY(ret < 0)) {
> > + goto out;
> > + }
> > + xsk_ring_cons__release(&xsk->umem->cq, tx_done);
> > +
> > + if (xsk->outstanding_tx > PROD_NUM_DESCS - (PROD_NUM_DESCS >> 2)) {
> > + /* If there are still a lot not transmitted,
> > + * try harder.
> > + */
> > + goto retry;
> > + }
> > +out:
> > + return 0;
> > +}
> > diff --git a/lib/netdev-afxdp.h b/lib/netdev-afxdp.h
> > new file mode 100644
> > index 000000000000..e0a49a89accf
> > --- /dev/null
> > +++ b/lib/netdev-afxdp.h
> > @@ -0,0 +1,51 @@
> > +/*
> > + * Copyright (c) 2018 Nicira, Inc.
> > + *
> > + * Licensed under the Apache License, Version 2.0 (the "License");
> > + * you may not use this file except in compliance with the License.
> > + * You may obtain a copy of the License at:
> > + *
> > + * http://www.apache.org/licenses/LICENSE-2.0
> > + *
> > + * Unless required by applicable law or agreed to in writing, software
> > + * distributed under the License is distributed on an "AS IS" BASIS,
> > + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
> > + * See the License for the specific language governing permissions and
> > + * limitations under the License.
> > + */
> > +
> > +#ifndef NETDEV_AFXDP_H
> > +#define NETDEV_AFXDP_H 1
> > +
> > +#include <stdint.h>
> > +#include <stdbool.h>
> > +
> > +/* These functions are Linux AF_XDP specific, so they should be used directly
> > + * only by Linux-specific code. */
> > +#define MAX_XSKQ 16
> > +struct netdev;
> > +struct xsk_socket_info;
> > +struct xdp_umem;
> > +struct dp_packet_batch;
> > +struct smap;
> > +struct dp_packet;
> > +
> > +void xsk_configure_all(struct netdev *netdev);
> > +
> > +void xsk_destroy_all(struct netdev *netdev);
> > +
> > +int netdev_linux_rxq_xsk(struct xsk_socket_info *xsk,
> > + struct dp_packet_batch *batch);
> > +
> > +int netdev_linux_afxdp_batch_send(struct xsk_socket_info *xsk,
> > + struct dp_packet_batch *batch);
> > +
> > +int netdev_afxdp_set_config(struct netdev *netdev, const struct smap *args,
> > + char **errp);
> > +int netdev_afxdp_get_config(const struct netdev *netdev, struct smap *args);
> > +int netdev_afxdp_get_numa_id(const struct netdev *netdev);
> > +
> > +void free_afxdp_buf(struct dp_packet *p);
> > +void free_afxdp_buf_batch(struct dp_packet_batch *batch);
> > +int netdev_afxdp_reconfigure(struct netdev *netdev);
> > +#endif /* netdev-afxdp.h */
> > diff --git a/lib/netdev-linux.c b/lib/netdev-linux.c
> > index f75d73fd39f8..a17cf614a00c 100644
> > --- a/lib/netdev-linux.c
> > +++ b/lib/netdev-linux.c
> > @@ -75,6 +75,7 @@
> > #include "unaligned.h"
> > #include "openvswitch/vlog.h"
> > #include "util.h"
> > +#include "netdev-afxdp.h"
>
> Headers should be added in lexicographical order.
OK will fix it.
>
> >
> > VLOG_DEFINE_THIS_MODULE(netdev_linux);
> >
> > @@ -487,51 +488,6 @@ static int tc_calc_cell_log(unsigned int mtu);
> > static void tc_fill_rate(struct tc_ratespec *rate, uint64_t bps, int mtu);
> > static int tc_calc_buffer(unsigned int Bps, int mtu, uint64_t burst_bytes);
> >
> > -struct netdev_linux {
> > - struct netdev up;
> > -
> > - /* Protects all members below. */
> > - struct ovs_mutex mutex;
> > -
> > - unsigned int cache_valid;
> > -
> > - bool miimon; /* Link status of last poll. */
> > - long long int miimon_interval; /* Miimon Poll rate. Disabled if <= 0. */
> > - struct timer miimon_timer;
> > -
> > - int netnsid; /* Network namespace ID. */
> > - /* The following are figured out "on demand" only. They are only valid
> > - * when the corresponding VALID_* bit in 'cache_valid' is set. */
> > - int ifindex;
> > - struct eth_addr etheraddr;
> > - int mtu;
> > - unsigned int ifi_flags;
> > - long long int carrier_resets;
> > - uint32_t kbits_rate; /* Policing data. */
> > - uint32_t kbits_burst;
> > - int vport_stats_error; /* Cached error code from vport_get_stats().
> > - 0 or an errno value. */
> > - int netdev_mtu_error; /* Cached error code from SIOCGIFMTU or SIOCSIFMTU. */
> > - int ether_addr_error; /* Cached error code from set/get etheraddr. */
> > - int netdev_policing_error; /* Cached error code from set policing. */
> > - int get_features_error; /* Cached error code from ETHTOOL_GSET. */
> > - int get_ifindex_error; /* Cached error code from SIOCGIFINDEX. */
> > -
> > - enum netdev_features current; /* Cached from ETHTOOL_GSET. */
> > - enum netdev_features advertised; /* Cached from ETHTOOL_GSET. */
> > - enum netdev_features supported; /* Cached from ETHTOOL_GSET. */
> > -
> > - struct ethtool_drvinfo drvinfo; /* Cached from ETHTOOL_GDRVINFO. */
> > - struct tc *tc;
> > -
> > - /* For devices of class netdev_tap_class only. */
> > - int tap_fd;
> > - bool present; /* If the device is present in the namespace */
> > - uint64_t tx_dropped; /* tap device can drop if the iface is down */
> > -
> > - /* LAG information. */
> > - bool is_lag_master; /* True if the netdev is a LAG master. */
> > -};
> >
> > struct netdev_rxq_linux {
> > struct netdev_rxq up;
> > @@ -579,13 +535,26 @@ is_netdev_linux_class(const struct netdev_class *netdev_class)
> > return netdev_class->run == netdev_linux_run;
> > }
> >
> > +#if HAVE_AF_XDP
> > +static bool
> > +is_afxdp_netdev(const struct netdev *netdev)
> > +{
> > + return netdev_get_class(netdev) == &netdev_afxdp_class;
> > +}
> > +#else
> > +static bool
> > +is_afxdp_netdev(const struct netdev *netdev OVS_UNUSED)
> > +{
> > + return false;
> > +}
> > +#endif
> > static bool
> > is_tap_netdev(const struct netdev *netdev)
> > {
> > return netdev_get_class(netdev) == &netdev_tap_class;
> > }
> >
> > -static struct netdev_linux *
> > +struct netdev_linux *
> > netdev_linux_cast(const struct netdev *netdev)
> > {
> > ovs_assert(is_netdev_linux_class(netdev_get_class(netdev)));
> > @@ -1083,7 +1052,11 @@ netdev_linux_destruct(struct netdev *netdev_)
> > if (netdev->miimon_interval > 0) {
> > atomic_count_dec(&miimon_cnt);
> > }
> > -
> > +#if HAVE_AF_XDP
> > + if (is_afxdp_netdev(netdev_)) {
> > + xsk_destroy_all(netdev_);
> > + }
> > +#endif
> > ovs_mutex_destroy(&netdev->mutex);
> > }
> >
> > @@ -1113,7 +1086,7 @@ netdev_linux_rxq_construct(struct netdev_rxq *rxq_)
> > rx->is_tap = is_tap_netdev(netdev_);
> > if (rx->is_tap) {
> > rx->fd = netdev->tap_fd;
> > - } else {
> > + } else if (!is_afxdp_netdev(netdev_)) {
> > struct sockaddr_ll sll;
> > int ifindex, val;
> > /* Result of tcpdump -dd inbound */
> > @@ -1318,10 +1291,18 @@ netdev_linux_rxq_recv(struct netdev_rxq *rxq_, struct dp_packet_batch *batch,
> > {
> > struct netdev_rxq_linux *rx = netdev_rxq_linux_cast(rxq_);
> > struct netdev *netdev = rx->up.netdev;
> > - struct dp_packet *buffer;
> > + struct dp_packet *buffer = NULL;
> > ssize_t retval;
> > int mtu;
> >
> > +#if HAVE_AF_XDP
> > + if (is_afxdp_netdev(netdev)) {
> > + struct netdev_linux *dev = netdev_linux_cast(netdev);
> > + int qid = rxq_->queue_id;
> > +
> > + return netdev_linux_rxq_xsk(dev->xsk[qid], batch);
> > + }
> > +#endif
> > if (netdev_linux_get_mtu__(netdev_linux_cast(netdev), &mtu)) {
> > mtu = ETH_PAYLOAD_MAX;
> > }
> > @@ -1329,6 +1310,7 @@ netdev_linux_rxq_recv(struct netdev_rxq *rxq_, struct dp_packet_batch *batch,
> > /* Assume Ethernet port. No need to set packet_type. */
> > buffer = dp_packet_new_with_headroom(VLAN_ETH_HEADER_LEN + mtu,
> > DP_NETDEV_HEADROOM);
> > +
> > retval = (rx->is_tap
> > ? netdev_linux_rxq_recv_tap(rx->fd, buffer)
> > : netdev_linux_rxq_recv_sock(rx->fd, buffer));
> > @@ -1480,7 +1462,8 @@ netdev_linux_send(struct netdev *netdev_, int qid OVS_UNUSED,
> > int error = 0;
> > int sock = 0;
> >
> > - if (!is_tap_netdev(netdev_)) {
> > + if (!is_tap_netdev(netdev_) &&
> > + !is_afxdp_netdev(netdev_)) {
> > if (netdev_linux_netnsid_is_remote(netdev_linux_cast(netdev_))) {
> > error = EOPNOTSUPP;
> > goto free_batch;
> > @@ -1499,6 +1482,23 @@ netdev_linux_send(struct netdev *netdev_, int qid OVS_UNUSED,
> > }
> >
> > error = netdev_linux_sock_batch_send(sock, ifindex, batch);
> > +#if HAVE_AF_XDP
> > + } else if (is_afxdp_netdev(netdev_)) {
> > + struct netdev_linux *dev = netdev_linux_cast(netdev_);
> > + struct dp_packet *packet;
> > +
> > + error = netdev_linux_afxdp_batch_send(dev->xsk[qid], batch);
> > +
> > + DP_PACKET_BATCH_FOR_EACH (i, packet, batch) {
> > + if (packet->source != DPBUF_AFXDP) {
>
> You have to be sure that all packets are from the same umem, not only
> the same type.
Good catch. Will do it next version.
>
> > + /* free one-by-one */
> > + goto free_batch;
> > + }
> > + }
> > + /* free in batch */
> > + free_afxdp_buf_batch(batch);
> > + return 0;
> > +#endif
> > } else {
> > error = netdev_linux_tap_batch_send(netdev_, batch);
> > }
> > @@ -3323,6 +3323,7 @@ const struct netdev_class netdev_linux_class = {
> > NETDEV_LINUX_CLASS_COMMON,
> > LINUX_FLOW_OFFLOAD_API,
> > .type = "system",
> > + .is_pmd = false,
> > .construct = netdev_linux_construct,
> > .get_stats = netdev_linux_get_stats,
> > .get_features = netdev_linux_get_features,
> > @@ -3333,6 +3334,7 @@ const struct netdev_class netdev_linux_class = {
> > const struct netdev_class netdev_tap_class = {
> > NETDEV_LINUX_CLASS_COMMON,
> > .type = "tap",
> > + .is_pmd = false,
> > .construct = netdev_linux_construct_tap,
> > .get_stats = netdev_tap_get_stats,
> > .get_features = netdev_linux_get_features,
> > @@ -3343,10 +3345,26 @@ const struct netdev_class netdev_internal_class = {
> > NETDEV_LINUX_CLASS_COMMON,
> > LINUX_FLOW_OFFLOAD_API,
> > .type = "internal",
> > + .is_pmd = false,
> > .construct = netdev_linux_construct,
> > .get_stats = netdev_internal_get_stats,
> > .get_status = netdev_internal_get_status,
> > };
> > +
> > +#ifdef HAVE_AF_XDP
> > +const struct netdev_class netdev_afxdp_class = {
> > + NETDEV_LINUX_CLASS_COMMON,
> > + .type = "afxdp",
> > + .is_pmd = true,
> > + .construct = netdev_linux_construct,
> > + .get_stats = netdev_linux_get_stats,
> > + .get_status = netdev_linux_get_status,
> > + .set_config = netdev_afxdp_set_config,
> > + .get_config = netdev_afxdp_get_config,
> > + .reconfigure = netdev_afxdp_reconfigure,
> > + .get_numa_id = netdev_afxdp_get_numa_id,
> > +};
> > +#endif
> >
> >
> > #define CODEL_N_QUEUES 0x0000
> > diff --git a/lib/netdev-linux.h b/lib/netdev-linux.h
> > index 17ca9120168a..570f9134e3d4 100644
> > --- a/lib/netdev-linux.h
> > +++ b/lib/netdev-linux.h
> > @@ -19,6 +19,21 @@
> >
> > #include <stdint.h>
> > #include <stdbool.h>
> > +#include <linux/filter.h>
> > +#include <linux/gen_stats.h>
> > +#include <linux/if_ether.h>
> > +#include <linux/if_tun.h>
> > +#include <linux/types.h>
> > +#include <linux/ethtool.h>
> > +#include <linux/mii.h>
> > +
> > +#include "netdev-provider.h"
> > +#include "netdev-tc-offloads.h"
> > +#include "netdev-vport.h"
> > +#include "openvswitch/thread.h"
> > +#include "timer.h"
> > +#include "ovs-atomic.h"
> > +#include "netdev-afxdp.h"
> >
> > /* These functions are Linux specific, so they should be used directly only by
> > * Linux-specific code. */
> > @@ -28,6 +43,7 @@ struct netdev;
> > int netdev_linux_ethtool_set_flag(struct netdev *netdev, uint32_t flag,
> > const char *flag_name, bool enable);
> > int linux_get_ifindex(const char *netdev_name);
> > +struct netdev_linux *netdev_linux_cast(const struct netdev *netdev);
> >
> > #define LINUX_FLOW_OFFLOAD_API \
> > .flow_flush = netdev_tc_flow_flush, \
> > @@ -39,4 +55,60 @@ int linux_get_ifindex(const char *netdev_name);
> > .flow_del = netdev_tc_flow_del, \
> > .init_flow_api = netdev_tc_init_flow_api
> >
> > +struct netdev_linux {
> > + struct netdev up;
> > +
> > + /* Protects all members below. */
> > + struct ovs_mutex mutex;
> > +
> > + unsigned int cache_valid;
> > +
> > + bool miimon; /* Link status of last poll. */
> > + long long int miimon_interval; /* Miimon Poll rate. Disabled if <= 0. */
> > + struct timer miimon_timer;
> > +
> > + int netnsid; /* Network namespace ID. */
> > + /* The following are figured out "on demand" only. They are only valid
> > + * when the corresponding VALID_* bit in 'cache_valid' is set. */
> > + int ifindex;
> > + struct eth_addr etheraddr;
> > + int mtu;
> > + unsigned int ifi_flags;
> > + long long int carrier_resets;
> > + uint32_t kbits_rate; /* Policing data. */
> > + uint32_t kbits_burst;
> > + int vport_stats_error; /* Cached error code from vport_get_stats().
> > + 0 or an errno value. */
> > + int netdev_mtu_error; /* Cached error code from SIOCGIFMTU
> > + * or SIOCSIFMTU.
> > + */
> > + int ether_addr_error; /* Cached error code from set/get etheraddr. */
> > + int netdev_policing_error; /* Cached error code from set policing. */
> > + int get_features_error; /* Cached error code from ETHTOOL_GSET. */
> > + int get_ifindex_error; /* Cached error code from SIOCGIFINDEX. */
> > +
> > + enum netdev_features current; /* Cached from ETHTOOL_GSET. */
> > + enum netdev_features advertised; /* Cached from ETHTOOL_GSET. */
> > + enum netdev_features supported; /* Cached from ETHTOOL_GSET. */
> > +
> > + struct ethtool_drvinfo drvinfo; /* Cached from ETHTOOL_GDRVINFO. */
> > + struct tc *tc;
> > +
> > + /* For devices of class netdev_tap_class only. */
> > + int tap_fd;
> > + bool present; /* If the device is present in the namespace */
> > + uint64_t tx_dropped; /* tap device can drop if the iface is down */
> > +
> > + /* LAG information. */
> > + bool is_lag_master; /* True if the netdev is a LAG master. */
> > +
> > + /* AF_XDP information */
> > +#ifdef HAVE_AF_XDP
> > + struct xsk_socket_info *xsk[MAX_XSKQ];
> > + int requested_n_rxq;
> > + int xdpmode, requested_xdpmode; /* detect mode changed */
> > + int xdp_flags, xdp_bind_flags;
> > +#endif
> > +};
> > +
>
> Exposing internal data structures is not a good thing.
> You may create lib/netdev-linux-private.h and move the structure with the
> cast function there.
>
> > #endif /* netdev-linux.h */
> > diff --git a/lib/netdev-provider.h b/lib/netdev-provider.h
> > index fb0c27e6e8e8..d433818f7064 100644
> > --- a/lib/netdev-provider.h
> > +++ b/lib/netdev-provider.h
> > @@ -902,7 +902,9 @@ extern const struct netdev_class netdev_linux_class;
> > #endif
> > extern const struct netdev_class netdev_internal_class;
> > extern const struct netdev_class netdev_tap_class;
> > -
> > +#if HAVE_AF_XDP
> > +extern const struct netdev_class netdev_afxdp_class;
> > +#endif
> > #ifdef __cplusplus
> > }
> > #endif
> > diff --git a/lib/netdev.c b/lib/netdev.c
> > index 7d7ecf6f0946..e2fae37d5a5e 100644
> > --- a/lib/netdev.c
> > +++ b/lib/netdev.c
> > @@ -146,6 +146,9 @@ netdev_initialize(void)
> > netdev_register_provider(&netdev_internal_class);
> > netdev_register_provider(&netdev_tap_class);
> > netdev_vport_tunnel_register();
> > +#ifdef HAVE_AF_XDP
> > + netdev_register_provider(&netdev_afxdp_class);
> > +#endif
> > #endif
> > #if defined(__FreeBSD__) || defined(__NetBSD__)
> > netdev_register_provider(&netdev_tap_class);
> > diff --git a/lib/xdpsock.c b/lib/xdpsock.c
> > new file mode 100644
> > index 000000000000..7f20e16364e3
> > --- /dev/null
> > +++ b/lib/xdpsock.c
> > @@ -0,0 +1,236 @@
> > +/*
> > + * Copyright (c) 2018, 2019 Nicira, Inc.
> > + *
> > + * Licensed under the Apache License, Version 2.0 (the "License");
> > + * you may not use this file except in compliance with the License.
> > + * You may obtain a copy of the License at:
> > + *
> > + * http://www.apache.org/licenses/LICENSE-2.0
> > + *
> > + * Unless required by applicable law or agreed to in writing, software
> > + * distributed under the License is distributed on an "AS IS" BASIS,
> > + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
> > + * See the License for the specific language governing permissions and
> > + * limitations under the License.
> > + */
> > +#include <config.h>
>
> Space here.
>
> > +#include <ctype.h>
> > +#include <errno.h>
> > +#include <fcntl.h>
> > +#include <stdarg.h>
> > +#include <stdlib.h>
> > +#include <string.h>
> > +#include <sys/stat.h>
> > +#include <sys/types.h>
> > +#include <syslog.h>
> > +#include <time.h>
> > +#include <unistd.h>
>
> Space here.
>
> > +#include "openvswitch/vlog.h"
> > +#include "async-append.h"
> > +#include "coverage.h"
> > +#include "dirs.h"
> > +#include "ovs-thread.h"
> > +#include "sat-math.h"
> > +#include "socket-util.h"
> > +#include "svec.h"
> > +#include "syslog-direct.h"
> > +#include "syslog-libc.h"
> > +#include "syslog-provider.h"
> > +#include "timeval.h"
> > +#include "unixctl.h"
> > +#include "util.h"
> > +#include "ovs-atomic.h"
> > +#include "openvswitch/compiler.h"
> > +#include "dp-packet.h"
>
> Please, keep them sorted.
>
> > +
> > +#include "xdpsock.h"
>
> This should be moved closer to 'config.h'
>
Right, thanks!
> > +
> > +static inline void ovs_spinlock_init(ovs_spinlock_t *sl)
>
> Please, keep the consistency in function definitions.
> Function name should start from the new line. Same for other functions.
>
OK, will also check other places, thanks!
> > +{
> > + sl->locked = 0;
>
> atomic_init(&sl->locked, 0);
>
> > +}
> > +
> > +static inline void ovs_spin_lock(ovs_spinlock_t *sl)
> > +{
> > + int exp = 0, locked = 0;
> > +
> > + while (!atomic_compare_exchange_strong_explicit(&sl->locked, &exp, 1,
> > + memory_order_acquire,
> > + memory_order_relaxed)) {
> > + locked = 1;
> > + while (locked) {
> > + atomic_read_relaxed(&sl->locked, &locked);
> > + }
> > + exp = 0;
> > + }
> > +}
> > +
> > +static inline void ovs_spin_unlock(ovs_spinlock_t *sl)
> > +{
> > + atomic_store_explicit(&sl->locked, 0, memory_order_release);
> > +}
> > +
> > +static inline int OVS_UNUSED ovs_spin_trylock(ovs_spinlock_t *sl)
> > +{
> > + int exp = 0;
> > + return atomic_compare_exchange_strong_explicit(&sl->locked, &exp, 1,
> > + memory_order_acquire,
> > + memory_order_relaxed);
> > +}
> > +
> > +inline int
> > +__umem_elem_push_n(struct umem_pool *umemp, int n, void **addrs)
> > +{
> > + void *ptr;
> > +
> > + if (OVS_UNLIKELY(umemp->index + n > umemp->size)) {
> > + return -ENOMEM;
> > + }
> > +
> > + ptr = &umemp->array[umemp->index];
> > + memcpy(ptr, addrs, n * sizeof(void *));
> > + umemp->index += n;
> > +
> > + return 0;
> > +}
> > +
> > +int umem_elem_push_n(struct umem_pool *umemp, int n, void **addrs)
> > +{
> > + int ret;
> > +
> > + ovs_spin_lock(&umemp->mutex);
> > + ret = __umem_elem_push_n(umemp, n, addrs);
> > + ovs_spin_unlock(&umemp->mutex);
> > +
> > + return ret;
> > +}
> > +
> > +inline void
> > +__umem_elem_push(struct umem_pool *umemp OVS_UNUSED, void *addr)
>
> unused?
Thanks, will check all the places using unused.
>
> > +{
> > + umemp->array[umemp->index++] = addr;
> > +}
> > +
> > +void
> > +umem_elem_push(struct umem_pool *umemp OVS_UNUSED, void *addr)
>
> unused?
>
> > +{
> > +
> > + if (OVS_UNLIKELY(umemp->index >= umemp->size)) {
> > + /* stack is full */
> > + /* it's possible that one umem gets pushed twice,
> > + * because actions=1,2,3... multiple ports?
>
> In case of multiple output ports, packet will be cloned, so it's
> not the case. Most probably, you're pushing buffer from the wrong
> umem, i.e. umem of the diferent port/rxq.
This should be OK.
When packet gets cloned, it has
dp_execute_cb
dp_packet_batch_clone
dp_packet_clone
....
dp_packet_use
so this buffer is cloned to DPBUF_MALLOC
We will end up having to copy this buffer at
netdev_linux_afxdp_batch_send() when there are
multiple output ports.
>
> > + */
> > + OVS_NOT_REACHED();
> > + }
> > +
> > + ovs_assert(((uint64_t)addr & FRAME_SHIFT_MASK) == 0);
> > +
> > + ovs_spin_lock(&umemp->mutex);
> > + __umem_elem_push(umemp, addr);
> > + ovs_spin_unlock(&umemp->mutex);
> > +}
> > +
> > +inline int
> > +__umem_elem_pop_n(struct umem_pool *umemp, int n, void **addrs)
> > +{
> > + void *ptr;
> > +
> > + if (OVS_UNLIKELY(umemp->index - n < 0)) {
> > + return -ENOMEM;
> > + }
> > +
> > + umemp->index -= n;
> > + ptr = &umemp->array[umemp->index];
> > + memcpy(addrs, ptr, n * sizeof(void *));
> > +
> > + return 0;
> > +}
> > +
> > +int
> > +umem_elem_pop_n(struct umem_pool *umemp, int n, void **addrs)
> > +{
> > + int ret;
> > +
> > + ovs_spin_lock(&umemp->mutex);
> > + ret = __umem_elem_pop_n(umemp, n, addrs);
> > + ovs_spin_unlock(&umemp->mutex);
> > +
> > + return ret;
> > +}
> > +
> > +inline void *
> > +__umem_elem_pop(struct umem_pool *umemp OVS_UNUSED)
>
> unused?
>
> > +{
> > + return umemp->array[--umemp->index];
> > +}
> > +
> > +void *
> > +umem_elem_pop(struct umem_pool *umemp OVS_UNUSED)
>
> unused?
>
> > +{
> > + void *ptr;
> > +
> > + ovs_spin_lock(&umemp->mutex);
> > + ptr = __umem_elem_pop(umemp);
> > + ovs_spin_unlock(&umemp->mutex);
> > +
> > + return ptr;
> > +}
> > +
> > +void **
> > +__umem_pool_alloc(unsigned int size)
> > +{
> > + void *bufs;
> > +
> > + ovs_assert(posix_memalign(&bufs, getpagesize(),
> > + size * sizeof(void *)) == 0);
> > + memset(bufs, 0, size * sizeof(void *));
> > + return (void **)bufs;
> > +}
> > +
> > +unsigned int
> > +umem_elem_count(struct umem_pool *mpool)
> > +{
> > + return mpool->index;
> > +}
> > +
> > +int
> > +umem_pool_init(struct umem_pool *umemp OVS_UNUSED, unsigned int size)
> > +{
> > + umemp->array = __umem_pool_alloc(size);
> > + if (!umemp->array) {
> > + OVS_NOT_REACHED();
> > + }
> > +
> > + umemp->size = size;
> > + umemp->index = 0;
> > + ovs_spinlock_init(&umemp->mutex);
> > + return 0;
> > +}
> > +
> > +void
> > +umem_pool_cleanup(struct umem_pool *umemp OVS_UNUSED)
> > +{
> > + free(umemp->array);
> > +}
> > +
> > +/* AF_XDP metadata init/destroy */
> > +int
> > +xpacket_pool_init(struct xpacket_pool *xp, unsigned int size)
> > +{
> > + void *bufs;
> > +
> > + /* TODO: check HAVE_POSIX_MEMALIGN */
> > + ovs_assert(posix_memalign(&bufs, getpagesize(),
> > + size * sizeof(struct dp_packet_afxdp)) == 0);
> > + memset(bufs, 0, size * sizeof(struct dp_packet_afxdp));
> > +
> > + xp->array = bufs;
> > + xp->size = size;
> > + return 0;
> > +}
> > +
> > +void
> > +xpacket_pool_cleanup(struct xpacket_pool *xp)
> > +{
> > + free(xp->array);
> > +}
> > diff --git a/lib/xdpsock.h b/lib/xdpsock.h
> > new file mode 100644
> > index 000000000000..52d7faaacf75
> > --- /dev/null
> > +++ b/lib/xdpsock.h
> > @@ -0,0 +1,127 @@
> > +/*
> > + * Copyright (c) 2018, 2019 Nicira, Inc.
> > + *
> > + * Licensed under the Apache License, Version 2.0 (the "License");
> > + * you may not use this file except in compliance with the License.
> > + * You may obtain a copy of the License at:
> > + *
> > + * http://www.apache.org/licenses/LICENSE-2.0
> > + *
> > + * Unless required by applicable law or agreed to in writing, software
> > + * distributed under the License is distributed on an "AS IS" BASIS,
> > + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
> > + * See the License for the specific language governing permissions and
> > + * limitations under the License.
> > + */
> > +#ifndef XDPSOCK_H
> > +#define XDPSOCK_H 1
> > +#include <errno.h>
> > +#include <getopt.h>
> > +#include <libgen.h>
> > +#include <linux/bpf.h>
> > +#include <linux/if_link.h>
> > +#include <linux/if_xdp.h>
> > +#include <linux/if_ether.h>
> > +#include <net/if.h>
> > +#include <signal.h>
> > +#include <stdbool.h>
> > +#include <stdio.h>
> > +#include <stdlib.h>
> > +#include <string.h>
> > +#include <sys/resource.h>
> > +#include <sys/socket.h>
> > +#include <sys/mman.h>
> > +#include <time.h>
> > +#include <unistd.h>
> > +#include <pthread.h>
> > +#include <locale.h>
> > +#include <sys/types.h>
> > +#include <poll.h>
> > +#include <bpf/libbpf.h>
> > +
> > +#include "ovs-atomic.h"
> > +#include "openvswitch/thread.h"
> > +#include <bpf/xsk.h>
>
> Same for the headers.
sure, will fix it.
>
> > +
> > +#define FRAME_HEADROOM XDP_PACKET_HEADROOM
> > +#define FRAME_SIZE XSK_UMEM__DEFAULT_FRAME_SIZE
> > +#define BATCH_SIZE NETDEV_MAX_BURST
> > +#define FRAME_SHIFT XSK_UMEM__DEFAULT_FRAME_SHIFT
> > +#define FRAME_SHIFT_MASK ((1 << FRAME_SHIFT) - 1)
> > +
> > +#define NUM_FRAMES 4096
> > +#define PROD_NUM_DESCS 512
> > +#define CONS_NUM_DESCS 512
> > +
> > +#ifdef USE_XSK_DEFAULT
> > +#define PROD_NUM_DESCS XSK_RING_PROD__DEFAULT_NUM_DESCS
> > +#define CONS_NUM_DESCS XSK_RING_CONS__DEFAULT_NUM_DESCS
> > +#endif
> > +
> > +typedef struct {
> > + atomic_int locked;
> > +} ovs_spinlock_t;
> > +
> > +/* LIFO ptr_array */
> > +struct umem_pool {
> > + int index; /* point to top */
> > + unsigned int size;
> > + ovs_spinlock_t mutex;
> > + void **array; /* a pointer array */
> > +};
> > +
> > +/* array-based dp_packet_afxdp */
> > +struct xpacket_pool {
> > + unsigned int size;
> > + struct dp_packet_afxdp **array;
> > +};
> > +
> > +struct xsk_umem_info {
> > + struct umem_pool mpool;
> > + struct xpacket_pool xpool;
> > + struct xsk_ring_prod fq;
> > + struct xsk_ring_cons cq;
> > + struct xsk_umem *umem;
> > + void *buffer;
> > +};
> > +
> > +struct xsk_socket_info {
> > + struct xsk_ring_cons rx;
> > + struct xsk_ring_prod tx;
> > + struct xsk_umem_info *umem;
> > + struct xsk_socket *xsk;
> > + unsigned long rx_npkts;
> > + unsigned long tx_npkts;
> > + unsigned long prev_rx_npkts;
> > + unsigned long prev_tx_npkts;
> > + uint32_t outstanding_tx;
> > +};
> > +
> > +struct umem_elem_head {
> > + unsigned int index;
> > + struct ovs_mutex mutex;
> > + uint32_t n;
> > +};
>
> This structure is not used.
good catch, thanks.
>
> > +
> > +struct umem_elem {
> > + struct umem_elem *next;
> > +};
> > +
> > +void __umem_elem_push(struct umem_pool *umemp, void *addr);
> > +void umem_elem_push(struct umem_pool *umemp, void *addr);
> > +int __umem_elem_push_n(struct umem_pool *umemp, int n, void **addrs);
> > +int umem_elem_push_n(struct umem_pool *umemp, int n, void **addrs);
> > +
> > +void *__umem_elem_pop(struct umem_pool *umemp);
> > +void *umem_elem_pop(struct umem_pool *umemp);
> > +int __umem_elem_pop_n(struct umem_pool *umemp, int n, void **addrs);
> > +int umem_elem_pop_n(struct umem_pool *umemp, int n, void **addrs);
> > +
> > +void **__umem_pool_alloc(unsigned int size);
> > +int umem_pool_init(struct umem_pool *umemp, unsigned int size);
> > +void umem_pool_cleanup(struct umem_pool *umemp);
> > +unsigned int umem_elem_count(struct umem_pool *mpool);
> > +int xpacket_pool_init(struct xpacket_pool *xp, unsigned int size);
> > +void xpacket_pool_cleanup(struct xpacket_pool *xp);
> > +
> > +#endif
> > diff --git a/tests/automake.mk b/tests/automake.mk
> > index ea16532dd2a0..715cef9a6b3b 100644
> > --- a/tests/automake.mk
> > +++ b/tests/automake.mk
> > @@ -4,12 +4,14 @@ EXTRA_DIST += \
> > $(SYSTEM_TESTSUITE_AT) \
> > $(SYSTEM_KMOD_TESTSUITE_AT) \
> > $(SYSTEM_USERSPACE_TESTSUITE_AT) \
> > + $(SYSTEM_AFXDP_TESTSUITE_AT) \
> > $(SYSTEM_OFFLOADS_TESTSUITE_AT) \
> > $(SYSTEM_DPDK_TESTSUITE_AT) \
> > $(OVSDB_CLUSTER_TESTSUITE_AT) \
> > $(TESTSUITE) \
> > $(SYSTEM_KMOD_TESTSUITE) \
> > $(SYSTEM_USERSPACE_TESTSUITE) \
> > + $(SYSTEM_AFXDP_TESTSUITE) \
> > $(SYSTEM_OFFLOADS_TESTSUITE) \
> > $(SYSTEM_DPDK_TESTSUITE) \
> > $(OVSDB_CLUSTER_TESTSUITE) \
> > @@ -158,6 +160,11 @@ SYSTEM_USERSPACE_TESTSUITE_AT = \
> > tests/system-userspace-macros.at \
> > tests/system-userspace-packet-type-aware.at
> >
> > +SYSTEM_AFXDP_TESTSUITE_AT = \
> > + tests/system-afxdp-testsuite.at \
> > + tests/system-afxdp-traffic.at \
> > + tests/system-afxdp-macros.at
> > +
> > SYSTEM_TESTSUITE_AT = \
> > tests/system-common-macros.at \
> > tests/system-ovn.at \
> > @@ -182,6 +189,7 @@ TESTSUITE = $(srcdir)/tests/testsuite
> > TESTSUITE_PATCH = $(srcdir)/tests/testsuite.patch
> > SYSTEM_KMOD_TESTSUITE = $(srcdir)/tests/system-kmod-testsuite
> > SYSTEM_USERSPACE_TESTSUITE = $(srcdir)/tests/system-userspace-testsuite
> > +SYSTEM_AFXDP_TESTSUITE = $(srcdir)/tests/system-afxdp-testsuite
> > SYSTEM_OFFLOADS_TESTSUITE = $(srcdir)/tests/system-offloads-testsuite
> > SYSTEM_DPDK_TESTSUITE = $(srcdir)/tests/system-dpdk-testsuite
> > OVSDB_CLUSTER_TESTSUITE = $(srcdir)/tests/ovsdb-cluster-testsuite
> > @@ -315,6 +323,11 @@ check-system-userspace: all
> > set $(SHELL) '$(SYSTEM_USERSPACE_TESTSUITE)' -C tests AUTOTEST_PATH='$(AUTOTEST_PATH)'; \
> > "$$@" $(TESTSUITEFLAGS) -j1 || (test X'$(RECHECK)' = Xyes && "$$@" --recheck)
> >
> > +check-afxdp: all
> > + $(MAKE) install
> > + set $(SHELL) '$(SYSTEM_AFXDP_TESTSUITE)' -C tests AUTOTEST_PATH='$(AUTOTEST_PATH)' $(TESTSUITEFLAGS) -j1; \
> > + "$$@" || (test X'$(RECHECK)' = Xyes && "$$@" --recheck)
> > +
> > check-offloads: all
> > set $(SHELL) '$(SYSTEM_OFFLOADS_TESTSUITE)' -C tests AUTOTEST_PATH='$(AUTOTEST_PATH)'; \
> > "$$@" $(TESTSUITEFLAGS) -j1 || (test X'$(RECHECK)' = Xyes && "$$@" --recheck)
> > @@ -352,6 +365,10 @@ $(SYSTEM_USERSPACE_TESTSUITE): package.m4 $(SYSTEM_TESTSUITE_AT) $(SYSTEM_USERSP
> > $(AM_V_GEN)$(AUTOTEST) -I '$(srcdir)' -o $@.tmp $@.at
> > $(AM_V_at)mv $@.tmp $@
> >
> > +$(SYSTEM_AFXDP_TESTSUITE): package.m4 $(SYSTEM_TESTSUITE_AT) $(SYSTEM_AFXDP_TESTSUITE_AT) $(COMMON_MACROS_AT)
> > + $(AM_V_GEN)$(AUTOTEST) -I '$(srcdir)' -o $@.tmp $@.at
> > + $(AM_V_at)mv $@.tmp $@
> > +
> > $(SYSTEM_OFFLOADS_TESTSUITE): package.m4 $(SYSTEM_TESTSUITE_AT) $(SYSTEM_OFFLOADS_TESTSUITE_AT) $(COMMON_MACROS_AT)
> > $(AM_V_GEN)$(AUTOTEST) -I '$(srcdir)' -o $@.tmp $@.at
> > $(AM_V_at)mv $@.tmp $@
> > diff --git a/tests/system-afxdp-macros.at b/tests/system-afxdp-macros.at
> > new file mode 100644
> > index 000000000000..2c58c2d6554b
> > --- /dev/null
> > +++ b/tests/system-afxdp-macros.at
> > @@ -0,0 +1,153 @@
> > +# _ADD_BR([name])
> > +#
> > +# Expands into the proper ovs-vsctl commands to create a bridge with the
> > +# appropriate type and properties
> > +m4_define([_ADD_BR], [[add-br $1 -- set Bridge $1 datapath_type=netdev protocols=OpenFlow10,OpenFlow11,OpenFlow12,OpenFlow13,OpenFlow14,OpenFlow15 fail-mode=secure ]])
> > +
> > +# OVS_TRAFFIC_VSWITCHD_START([vsctl-args], [vsctl-output], [=override])
> > +#
> > +# Creates a database and starts ovsdb-server, starts ovs-vswitchd
> > +# connected to that database, calls ovs-vsctl to create a bridge named
> > +# br0 with predictable settings, passing 'vsctl-args' as additional
> > +# commands to ovs-vsctl. If 'vsctl-args' causes ovs-vsctl to provide
> > +# output (e.g. because it includes "create" commands) then 'vsctl-output'
> > +# specifies the expected output after filtering through uuidfilt.
> > +m4_define([OVS_TRAFFIC_VSWITCHD_START],
> > + [
> > + export OVS_PKGDATADIR=$(`pwd`)
> > + _OVS_VSWITCHD_START([--disable-system])
> > + AT_CHECK([ovs-vsctl -- _ADD_BR([br0]) -- $1 m4_if([$2], [], [], [| uuidfilt])], [0], [$2])
> > +])
> > +
> > +# OVS_TRAFFIC_VSWITCHD_STOP([WHITELIST], [extra_cmds])
> > +#
> > +# Gracefully stops ovs-vswitchd and ovsdb-server, checking their log files
> > +# for messages with severity WARN or higher and signaling an error if any
> > +# is present. The optional WHITELIST may contain shell-quoted "sed"
> > +# commands to delete any warnings that are actually expected, e.g.:
> > +#
> > +# OVS_TRAFFIC_VSWITCHD_STOP(["/expected error/d"])
> > +#
> > +# 'extra_cmds' are shell commands to be executed afte OVS_VSWITCHD_STOP() is
> > +# invoked. They can be used to perform additional cleanups such as name space
> > +# removal.
> > +m4_define([OVS_TRAFFIC_VSWITCHD_STOP],
> > + [OVS_VSWITCHD_STOP([dnl
> > +$1";/netdev_linux.*obtaining netdev stats via vport failed/d
> > +/dpif_netlink.*Generic Netlink family 'ovs_datapath' does not exist. The Open vSwitch kernel module is probably not loaded./d
> > +/dpif_netdev(revalidator.*)|ERR|internal error parsing flow key/d
> > +/dpif(revalidator.*)|WARN|netdev at ovs-netdev: failed to put/d
> > +"])
> > + AT_CHECK([:; $2])
> > + ])
> > +
> > +m4_define([ADD_VETH_AFXDP],
> > + [ AT_CHECK([ip link add $1 type veth peer name ovs-$1 || return 77])
> > + CONFIGURE_AFXDP_VETH_OFFLOADS([$1])
> > + AT_CHECK([ip link set $1 netns $2])
> > + AT_CHECK([ip link set dev ovs-$1 up])
> > + AT_CHECK([ovs-vsctl add-port $3 ovs-$1 -- \
> > + set interface ovs-$1 external-ids:iface-id="$1" type="afxdp"])
> > + NS_CHECK_EXEC([$2], [ip addr add $4 dev $1 $7])
> > + NS_CHECK_EXEC([$2], [ip link set dev $1 up])
> > + if test -n "$5"; then
> > + NS_CHECK_EXEC([$2], [ip link set dev $1 address $5])
> > + fi
> > + if test -n "$6"; then
> > + NS_CHECK_EXEC([$2], [ip route add default via $6])
> > + fi
> > + on_exit 'ip link del ovs-$1'
> > + ]
> > +)
> > +
> > +# CONFIGURE_AFXDP_VETH_OFFLOADS([VETH])
> > +#
> > +# Disable TX offloads and VLAN offloads for veths used in AF_XDP.
> > +m4_define([CONFIGURE_AFXDP_VETH_OFFLOADS],
> > + [AT_CHECK([ethtool -K $1 tx off], [0], [ignore], [ignore])
> > + AT_CHECK([ethtool -K $1 rxvlan off], [0], [ignore], [ignore])
> > + AT_CHECK([ethtool -K $1 txvlan off], [0], [ignore], [ignore])
> > + ]
> > +)
> > +
> > +# CONFIGURE_VETH_OFFLOADS([VETH])
> > +#
> > +# Disable TX offloads for veths. The userspace datapath uses the AF_PACKET
> > +# socket to receive packets for veths. Unfortunately, the AF_PACKET socket
> > +# doesn't play well with offloads:
> > +# 1. GSO packets are received without segmentation and therefore discarded.
> > +# 2. Packets with offloaded partial checksum are received with the wrong
> > +# checksum, therefore discarded by the receiver.
> > +#
> > +# By disabling tx offloads in the non-OVS side of the veth peer we make sure
> > +# that the AF_PACKET socket will not receive bad packets.
> > +#
> > +# This is a workaround, and should be removed when offloads are properly
> > +# supported in netdev-linux.
> > +m4_define([CONFIGURE_VETH_OFFLOADS],
> > + [AT_CHECK([ethtool -K $1 tx off], [0], [ignore], [ignore])]
> > +)
> > +
> > +# CHECK_CONNTRACK()
> > +#
> > +# Perform requirements checks for running conntrack tests.
> > +#
> > +m4_define([CHECK_CONNTRACK],
> > + [AT_SKIP_IF([test $HAVE_PYTHON = no])]
> > +)
> > +
> > +# CHECK_CONNTRACK_ALG()
> > +#
> > +# Perform requirements checks for running conntrack ALG tests. The userspace
> > +# supports FTP and TFTP.
> > +#
> > +m4_define([CHECK_CONNTRACK_ALG])
> > +
> > +# CHECK_CONNTRACK_FRAG()
> > +#
> > +# Perform requirements checks for running conntrack fragmentations tests.
> > +# The userspace doesn't support fragmentation yet, so skip the tests.
> > +m4_define([CHECK_CONNTRACK_FRAG],
> > +[
> > + AT_SKIP_IF([:])
> > +])
> > +
> > +# CHECK_CONNTRACK_LOCAL_STACK()
> > +#
> > +# Perform requirements checks for running conntrack tests with local stack.
> > +# While the kernel connection tracker automatically passes all the connection
> > +# tracking state from an internal port to the OpenvSwitch kernel module, there
> > +# is simply no way of doing that with the userspace, so skip the tests.
> > +m4_define([CHECK_CONNTRACK_LOCAL_STACK],
> > +[
> > + AT_SKIP_IF([:])
> > +])
> > +
> > +# CHECK_CONNTRACK_NAT()
> > +#
> > +# Perform requirements checks for running conntrack NAT tests. The userspace
> > +# datapath supports NAT.
> > +#
> > +m4_define([CHECK_CONNTRACK_NAT])
> > +
> > +# CHECK_CT_DPIF_FLUSH_BY_CT_TUPLE()
> > +#
> > +# Perform requirements checks for running ovs-dpctl flush-conntrack by
> > +# conntrack 5-tuple test. The userspace datapath does not support
> > +# this feature yet.
> > +m4_define([CHECK_CT_DPIF_FLUSH_BY_CT_TUPLE],
> > +[
> > + AT_SKIP_IF([:])
> > +])
> > +
> > +# CHECK_CT_DPIF_SET_GET_MAXCONNS()
> > +#
> > +# Perform requirements checks for running ovs-dpctl ct-set-maxconns or
> > +# ovs-dpctl ct-get-maxconns. The userspace datapath does support this feature.
> > +m4_define([CHECK_CT_DPIF_SET_GET_MAXCONNS])
> > +
> > +# CHECK_CT_DPIF_GET_NCONNS()
> > +#
> > +# Perform requirements checks for running ovs-dpctl ct-get-nconns. The
> > +# userspace datapath does support this feature.
> > +m4_define([CHECK_CT_DPIF_GET_NCONNS])
> > diff --git a/tests/system-afxdp-testsuite.at b/tests/system-afxdp-testsuite.at
> > new file mode 100644
> > index 000000000000..538c0d15d556
> > --- /dev/null
> > +++ b/tests/system-afxdp-testsuite.at
> > @@ -0,0 +1,26 @@
> > +AT_INIT
> > +
> > +AT_COPYRIGHT([Copyright (c) 2018 Nicira, Inc.
> > +
> > +Licensed under the Apache License, Version 2.0 (the "License");
> > +you may not use this file except in compliance with the License.
> > +You may obtain a copy of the License at:
> > +
> > + http://www.apache.org/licenses/LICENSE-2.0
> > +
> > +Unless required by applicable law or agreed to in writing, software
> > +distributed under the License is distributed on an "AS IS" BASIS,
> > +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
> > +See the License for the specific language governing permissions and
> > +limitations under the License.])
> > +
> > +m4_ifdef([AT_COLOR_TESTS], [AT_COLOR_TESTS])
> > +
> > +m4_include([tests/ovs-macros.at])
> > +m4_include([tests/ovsdb-macros.at])
> > +m4_include([tests/ofproto-macros.at])
> > +m4_include([tests/system-afxdp-macros.at])
> > +m4_include([tests/system-common-macros.at])
> > +
> > +m4_include([tests/system-afxdp-traffic.at])
> > +m4_include([tests/system-ovn.at])
> > diff --git a/tests/system-afxdp-traffic.at b/tests/system-afxdp-traffic.at
> > new file mode 100644
> > index 000000000000..26f72acf48ef
> > --- /dev/null
> > +++ b/tests/system-afxdp-traffic.at
> > @@ -0,0 +1,978 @@
> > +AT_BANNER([AF_XDP netdev datapath-sanity])
> > +
> > +AT_SETUP([datapath - ping between two ports])
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +
> > +ulimit -l unlimited
> > +
> > +ADD_NAMESPACES(at_ns0, at_ns1)
> > +AT_CHECK([ovs-ofctl add-flow br0 "actions=normal"])
> > +
> > +ADD_VETH_AFXDP(p0, at_ns0, br0, "10.1.1.1/24")
> > +ADD_VETH_AFXDP(p1, at_ns1, br0, "10.1.1.2/24")
> > +
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 10.1.1.2 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([datapath - ping between two ports on vlan])
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +
> > +AT_CHECK([ovs-ofctl add-flow br0 "actions=normal"])
> > +
> > +ADD_NAMESPACES(at_ns0, at_ns1)
> > +
> > +ADD_VETH_AFXDP(p0, at_ns0, br0, "10.1.1.1/24")
> > +ADD_VETH_AFXDP(p1, at_ns1, br0, "10.1.1.2/24")
> > +
> > +ADD_VLAN(p0, at_ns0, 100, "10.2.2.1/24")
> > +ADD_VLAN(p1, at_ns1, 100, "10.2.2.2/24")
> > +
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 10.2.2.2 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([datapath - ping6 between two ports])
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +
> > +AT_CHECK([ovs-ofctl add-flow br0 "actions=normal"])
> > +
> > +ADD_NAMESPACES(at_ns0, at_ns1)
> > +
> > +ADD_VETH_AFXDP(p0, at_ns0, br0, "fc00::1/96")
> > +ADD_VETH_AFXDP(p1, at_ns1, br0, "fc00::2/96")
> > +
> > +dnl Linux seems to take a little time to get its IPv6 stack in order. Without
> > +dnl waiting, we get occasional failures due to the following error:
> > +dnl "connect: Cannot assign requested address"
> > +OVS_WAIT_UNTIL([ip netns exec at_ns0 ping6 -c 1 fc00::2])
> > +
> > +NS_CHECK_EXEC([at_ns0], [ping6 -q -c 3 -i 0.3 -w 6 fc00::2 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([datapath - ping6 between two ports on vlan])
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +
> > +AT_CHECK([ovs-ofctl add-flow br0 "actions=normal"])
> > +
> > +ADD_NAMESPACES(at_ns0, at_ns1)
> > +
> > +ADD_VETH_AFXDP(p0, at_ns0, br0, "fc00::1/96")
> > +ADD_VETH_AFXDP(p1, at_ns1, br0, "fc00::2/96")
> > +
> > +ADD_VLAN(p0, at_ns0, 100, "fc00:1::1/96")
> > +ADD_VLAN(p1, at_ns1, 100, "fc00:1::2/96")
> > +
> > +dnl Linux seems to take a little time to get its IPv6 stack in order. Without
> > +dnl waiting, we get occasional failures due to the following error:
> > +dnl "connect: Cannot assign requested address"
> > +OVS_WAIT_UNTIL([ip netns exec at_ns0 ping6 -c 1 fc00:1::2])
> > +
> > +NS_CHECK_EXEC([at_ns0], [ping6 -q -c 3 -i 0.3 -w 2 fc00:1::2 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +NS_CHECK_EXEC([at_ns0], [ping6 -s 1600 -q -c 3 -i 0.3 -w 2 fc00:1::2 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +NS_CHECK_EXEC([at_ns0], [ping6 -s 3200 -q -c 3 -i 0.3 -w 2 fc00:1::2 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([datapath - ping over vxlan tunnel])
> > +OVS_CHECK_VXLAN()
> > +
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +ADD_BR([br-underlay])
> > +
> > +AT_CHECK([ovs-ofctl add-flow br0 "actions=normal"])
> > +AT_CHECK([ovs-ofctl add-flow br-underlay "actions=normal"])
> > +
> > +ADD_NAMESPACES(at_ns0)
> > +
> > +dnl Set up underlay link from host into the namespace using veth pair.
> > +ADD_VETH_AFXDP(p0, at_ns0, br-underlay, "172.31.1.1/24")
> > +AT_CHECK([ip addr add dev br-underlay "172.31.1.100/24"])
> > +AT_CHECK([ip link set dev br-underlay up])
> > +
> > +
> > +dnl Set up tunnel endpoints on OVS outside the namespace and with a native
> > +dnl linux device inside the namespace.
> > +ADD_OVS_TUNNEL([vxlan], [br0], [at_vxlan0], [172.31.1.1], [10.1.1.100/24])
> > +ADD_NATIVE_TUNNEL([vxlan], [at_vxlan1], [at_ns0], [172.31.1.100], [10.1.1.1/24],
> > + [id 0 dstport 4789])
> > +
> > +AT_CHECK([ovs-appctl ovs/route/add 10.1.1.100/24 br0], [0], [OK
> > +])
> > +AT_CHECK([ovs-appctl ovs/route/add 172.31.1.92/24 br-underlay], [0], [OK
> > +])
> > +
> > +dnl First, check the underlay
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 172.31.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +dnl Okay, now check the overlay with different packet sizes
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +NS_CHECK_EXEC([at_ns0], [ping -s 1600 -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +NS_CHECK_EXEC([at_ns0], [ping -s 3200 -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([datapath - ping over vxlan6 tunnel])
> > +OVS_CHECK_VXLAN_UDP6ZEROCSUM()
> > +
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +ADD_BR([br-underlay])
> > +
> > +AT_CHECK([ovs-ofctl add-flow br0 "actions=normal"])
> > +AT_CHECK([ovs-ofctl add-flow br-underlay "actions=normal"])
> > +
> > +ADD_NAMESPACES(at_ns0)
> > +
> > +dnl Set up underlay link from host into the namespace using veth pair.
> > +ADD_VETH_AFXDP(p0, at_ns0, br-underlay, "fc00::1/64", [], [], "nodad")
> > +AT_CHECK([ip addr add dev br-underlay "fc00::100/64" nodad])
> > +AT_CHECK([ip link set dev br-underlay up])
> > +
> > +dnl Set up tunnel endpoints on OVS outside the namespace and with a native
> > +dnl linux device inside the namespace.
> > +ADD_OVS_TUNNEL6([vxlan], [br0], [at_vxlan0], [fc00::1], [10.1.1.100/24])
> > +ADD_NATIVE_TUNNEL6([vxlan], [at_vxlan1], [at_ns0], [fc00::100], [10.1.1.1/24],
> > + [id 0 dstport 4789 udp6zerocsumtx udp6zerocsumrx])
> > +
> > +AT_CHECK([ovs-appctl ovs/route/add 10.1.1.100/24 br0], [0], [OK
> > +])
> > +AT_CHECK([ovs-appctl ovs/route/add fc00::100/64 br-underlay], [0], [OK
> > +])
> > +
> > +OVS_WAIT_UNTIL([ip netns exec at_ns0 ping6 -c 1 fc00::100])
> > +
> > +dnl First, check the underlay
> > +NS_CHECK_EXEC([at_ns0], [ping6 -q -c 3 -i 0.3 -w 2 fc00::100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +dnl Okay, now check the overlay with different packet sizes
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +NS_CHECK_EXEC([at_ns0], [ping -s 1600 -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +NS_CHECK_EXEC([at_ns0], [ping -s 3200 -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([datapath - ping over gre tunnel])
> > +OVS_CHECK_GRE()
> > +
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +ADD_BR([br-underlay])
> > +
> > +AT_CHECK([ovs-ofctl add-flow br0 "actions=normal"])
> > +AT_CHECK([ovs-ofctl add-flow br-underlay "actions=normal"])
> > +
> > +ADD_NAMESPACES(at_ns0)
> > +
> > +dnl Set up underlay link from host into the namespace using veth pair.
> > +ADD_VETH_AFXDP(p0, at_ns0, br-underlay, "172.31.1.1/24")
> > +AT_CHECK([ip addr add dev br-underlay "172.31.1.100/24"])
> > +AT_CHECK([ip link set dev br-underlay up])
> > +
> > +dnl Set up tunnel endpoints on OVS outside the namespace and with a native
> > +dnl linux device inside the namespace.
> > +ADD_OVS_TUNNEL([gre], [br0], [at_gre0], [172.31.1.1], [10.1.1.100/24])
> > +ADD_NATIVE_TUNNEL([gretap], [ns_gre0], [at_ns0], [172.31.1.100], [10.1.1.1/24])
> > +
> > +AT_CHECK([ovs-appctl ovs/route/add 10.1.1.100/24 br0], [0], [OK
> > +])
> > +AT_CHECK([ovs-appctl ovs/route/add 172.31.1.92/24 br-underlay], [0], [OK
> > +])
> > +
> > +dnl First, check the underlay
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 172.31.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +dnl Okay, now check the overlay with different packet sizes
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +NS_CHECK_EXEC([at_ns0], [ping -s 1600 -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +NS_CHECK_EXEC([at_ns0], [ping -s 3200 -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([datapath - ping over erspan v1 tunnel])
> > +OVS_CHECK_GRE()
> > +OVS_CHECK_ERSPAN()
> > +
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +ADD_BR([br-underlay])
> > +
> > +AT_CHECK([ovs-ofctl add-flow br0 "actions=normal"])
> > +AT_CHECK([ovs-ofctl add-flow br-underlay "actions=normal"])
> > +
> > +ADD_NAMESPACES(at_ns0)
> > +
> > +dnl Set up underlay link from host into the namespace using veth pair.
> > +ADD_VETH_AFXDP(p0, at_ns0, br-underlay, "172.31.1.1/24")
> > +AT_CHECK([ip addr add dev br-underlay "172.31.1.100/24"])
> > +AT_CHECK([ip link set dev br-underlay up])
> > +
> > +dnl Set up tunnel endpoints on OVS outside the namespace and with a native
> > +dnl linux device inside the namespace.
> > +ADD_OVS_TUNNEL([erspan], [br0], [at_erspan0], [172.31.1.1], [10.1.1.100/24], [options:key=1 options:erspan_ver=1 options:erspan_idx=7])
> > +ADD_NATIVE_TUNNEL([erspan], [ns_erspan0], [at_ns0], [172.31.1.100], [10.1.1.1/24], [seq key 1 erspan_ver 1 erspan 7])
> > +
> > +AT_CHECK([ovs-appctl ovs/route/add 10.1.1.100/24 br0], [0], [OK
> > +])
> > +AT_CHECK([ovs-appctl ovs/route/add 172.31.1.92/24 br-underlay], [0], [OK
> > +])
> > +
> > +dnl First, check the underlay
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 172.31.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +dnl Okay, now check the overlay with different packet sizes
> > +dnl NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +NS_CHECK_EXEC([at_ns0], [ping -s 1200 -i 0.3 -c 3 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([datapath - ping over erspan v2 tunnel])
> > +OVS_CHECK_GRE()
> > +OVS_CHECK_ERSPAN()
> > +
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +ADD_BR([br-underlay])
> > +
> > +AT_CHECK([ovs-ofctl add-flow br0 "actions=normal"])
> > +AT_CHECK([ovs-ofctl add-flow br-underlay "actions=normal"])
> > +
> > +ADD_NAMESPACES(at_ns0)
> > +
> > +dnl Set up underlay link from host into the namespace using veth pair.
> > +ADD_VETH_AFXDP(p0, at_ns0, br-underlay, "172.31.1.1/24")
> > +AT_CHECK([ip addr add dev br-underlay "172.31.1.100/24"])
> > +AT_CHECK([ip link set dev br-underlay up])
> > +
> > +dnl Set up tunnel endpoints on OVS outside the namespace and with a native
> > +dnl linux device inside the namespace.
> > +ADD_OVS_TUNNEL([erspan], [br0], [at_erspan0], [172.31.1.1], [10.1.1.100/24], [options:key=1 options:erspan_ver=2 options:erspan_dir=1 options:erspan_hwid=0x7])
> > +ADD_NATIVE_TUNNEL([erspan], [ns_erspan0], [at_ns0], [172.31.1.100], [10.1.1.1/24], [seq key 1 erspan_ver 2 erspan_dir egress erspan_hwid 7])
> > +
> > +AT_CHECK([ovs-appctl ovs/route/add 10.1.1.100/24 br0], [0], [OK
> > +])
> > +AT_CHECK([ovs-appctl ovs/route/add 172.31.1.92/24 br-underlay], [0], [OK
> > +])
> > +
> > +dnl First, check the underlay
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 172.31.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +dnl Okay, now check the overlay with different packet sizes
> > +dnl NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +NS_CHECK_EXEC([at_ns0], [ping -s 1200 -i 0.3 -c 3 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([datapath - ping over ip6erspan v1 tunnel])
> > +OVS_CHECK_GRE()
> > +OVS_CHECK_ERSPAN()
> > +
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +ADD_BR([br-underlay])
> > +
> > +AT_CHECK([ovs-ofctl add-flow br0 "actions=normal"])
> > +AT_CHECK([ovs-ofctl add-flow br-underlay "actions=normal"])
> > +
> > +ADD_NAMESPACES(at_ns0)
> > +
> > +dnl Set up underlay link from host into the namespace using veth pair.
> > +ADD_VETH_AFXDP(p0, at_ns0, br-underlay, "fc00:100::1/96", [], [], nodad)
> > +AT_CHECK([ip addr add dev br-underlay "fc00:100::100/96" nodad])
> > +AT_CHECK([ip link set dev br-underlay up])
> > +
> > +dnl Set up tunnel endpoints on OVS outside the namespace and with a native
> > +dnl linux device inside the namespace.
> > +ADD_OVS_TUNNEL6([ip6erspan], [br0], [at_erspan0], [fc00:100::1], [10.1.1.100/24],
> > + [options:key=123 options:erspan_ver=1 options:erspan_idx=0x7])
> > +ADD_NATIVE_TUNNEL6([ip6erspan], [ns_erspan0], [at_ns0], [fc00:100::100],
> > + [10.1.1.1/24], [local fc00:100::1 seq key 123 erspan_ver 1 erspan 7])
> > +
> > +AT_CHECK([ovs-appctl ovs/route/add 10.1.1.100/24 br0], [0], [OK
> > +])
> > +AT_CHECK([ovs-appctl ovs/route/add fc00:100::1/96 br-underlay], [0], [OK
> > +])
> > +
> > +OVS_WAIT_UNTIL([ip netns exec at_ns0 ping6 -c 2 fc00:100::100])
> > +
> > +dnl First, check the underlay
> > +NS_CHECK_EXEC([at_ns0], [ping6 -q -c 3 -i 0.3 -w 2 fc00:100::100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +dnl Okay, now check the overlay with different packet sizes
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([datapath - ping over ip6erspan v2 tunnel])
> > +OVS_CHECK_GRE()
> > +OVS_CHECK_ERSPAN()
> > +
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +ADD_BR([br-underlay])
> > +
> > +AT_CHECK([ovs-ofctl add-flow br0 "actions=normal"])
> > +AT_CHECK([ovs-ofctl add-flow br-underlay "actions=normal"])
> > +
> > +ADD_NAMESPACES(at_ns0)
> > +
> > +dnl Set up underlay link from host into the namespace using veth pair.
> > +ADD_VETH_AFXDP(p0, at_ns0, br-underlay, "fc00:100::1/96", [], [], nodad)
> > +AT_CHECK([ip addr add dev br-underlay "fc00:100::100/96" nodad])
> > +AT_CHECK([ip link set dev br-underlay up])
> > +
> > +dnl Set up tunnel endpoints on OVS outside the namespace and with a native
> > +dnl linux device inside the namespace.
> > +ADD_OVS_TUNNEL6([ip6erspan], [br0], [at_erspan0], [fc00:100::1], [10.1.1.100/24],
> > + [options:key=121 options:erspan_ver=2 options:erspan_dir=0 options:erspan_hwid=0x7])
> > +ADD_NATIVE_TUNNEL6([ip6erspan], [ns_erspan0], [at_ns0], [fc00:100::100],
> > + [10.1.1.1/24],
> > + [local fc00:100::1 seq key 121 erspan_ver 2 erspan_dir ingress erspan_hwid 0x7])
> > +
> > +AT_CHECK([ovs-appctl ovs/route/add 10.1.1.100/24 br0], [0], [OK
> > +])
> > +AT_CHECK([ovs-appctl ovs/route/add fc00:100::1/96 br-underlay], [0], [OK
> > +])
> > +
> > +OVS_WAIT_UNTIL([ip netns exec at_ns0 ping6 -c 2 fc00:100::100])
> > +
> > +dnl First, check the underlay
> > +NS_CHECK_EXEC([at_ns0], [ping6 -q -c 3 -i 0.3 -w 2 fc00:100::100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +dnl Okay, now check the overlay with different packet sizes
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([datapath - ping over geneve tunnel])
> > +OVS_CHECK_GENEVE()
> > +
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +ADD_BR([br-underlay])
> > +
> > +AT_CHECK([ovs-ofctl add-flow br0 "actions=normal"])
> > +AT_CHECK([ovs-ofctl add-flow br-underlay "actions=normal"])
> > +
> > +ADD_NAMESPACES(at_ns0)
> > +
> > +dnl Set up underlay link from host into the namespace using veth pair.
> > +ADD_VETH_AFXDP(p0, at_ns0, br-underlay, "172.31.1.1/24")
> > +AT_CHECK([ip addr add dev br-underlay "172.31.1.100/24"])
> > +AT_CHECK([ip link set dev br-underlay up])
> > +
> > +dnl Set up tunnel endpoints on OVS outside the namespace and with a native
> > +dnl linux device inside the namespace.
> > +ADD_OVS_TUNNEL([geneve], [br0], [at_gnv0], [172.31.1.1], [10.1.1.100/24])
> > +ADD_NATIVE_TUNNEL([geneve], [ns_gnv0], [at_ns0], [172.31.1.100], [10.1.1.1/24],
> > + [vni 0])
> > +
> > +AT_CHECK([ovs-appctl ovs/route/add 10.1.1.100/24 br0], [0], [OK
> > +])
> > +AT_CHECK([ovs-appctl ovs/route/add 172.31.1.100/24 br-underlay], [0], [OK
> > +])
> > +
> > +dnl First, check the underlay
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 172.31.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +dnl Okay, now check the overlay with different packet sizes
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +NS_CHECK_EXEC([at_ns0], [ping -s 1600 -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +NS_CHECK_EXEC([at_ns0], [ping -s 3200 -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([datapath - ping over geneve6 tunnel])
> > +OVS_CHECK_GENEVE_UDP6ZEROCSUM()
> > +
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +ADD_BR([br-underlay])
> > +
> > +AT_CHECK([ovs-ofctl add-flow br0 "actions=normal"])
> > +AT_CHECK([ovs-ofctl add-flow br-underlay "actions=normal"])
> > +
> > +ADD_NAMESPACES(at_ns0)
> > +
> > +dnl Set up underlay link from host into the namespace using veth pair.
> > +ADD_VETH_AFXDP(p0, at_ns0, br-underlay, "fc00::1/64", [], [], "nodad")
> > +AT_CHECK([ip addr add dev br-underlay "fc00::100/64" nodad])
> > +AT_CHECK([ip link set dev br-underlay up])
> > +
> > +dnl Set up tunnel endpoints on OVS outside the namespace and with a native
> > +dnl linux device inside the namespace.
> > +ADD_OVS_TUNNEL6([geneve], [br0], [at_gnv0], [fc00::1], [10.1.1.100/24])
> > +ADD_NATIVE_TUNNEL6([geneve], [ns_gnv0], [at_ns0], [fc00::100], [10.1.1.1/24],
> > + [vni 0 udp6zerocsumtx udp6zerocsumrx])
> > +
> > +AT_CHECK([ovs-appctl ovs/route/add 10.1.1.100/24 br0], [0], [OK
> > +])
> > +AT_CHECK([ovs-appctl ovs/route/add fc00::100/64 br-underlay], [0], [OK
> > +])
> > +
> > +OVS_WAIT_UNTIL([ip netns exec at_ns0 ping6 -c 1 fc00::100])
> > +
> > +dnl First, check the underlay
> > +NS_CHECK_EXEC([at_ns0], [ping6 -q -c 3 -i 0.3 -w 2 fc00::100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +dnl Okay, now check the overlay with different packet sizes
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +NS_CHECK_EXEC([at_ns0], [ping -s 1600 -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +NS_CHECK_EXEC([at_ns0], [ping -s 3200 -q -c 3 -i 0.3 -w 2 10.1.1.100 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([datapath - clone action])
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +
> > +ADD_NAMESPACES(at_ns0, at_ns1, at_ns2)
> > +
> > +ADD_VETH_AFXDP(p0, at_ns0, br0, "10.1.1.1/24")
> > +ADD_VETH_AFXDP(p1, at_ns1, br0, "10.1.1.2/24")
> > +
> > +AT_CHECK([ovs-vsctl -- set interface ovs-p0 ofport_request=1 \
> > + -- set interface ovs-p1 ofport_request=2])
> > +
> > +AT_DATA([flows.txt], [dnl
> > +priority=1 actions=NORMAL
> > +priority=10 in_port=1,ip,actions=clone(mod_dl_dst(50:54:00:00:00:0a),set_field:192.168.3.3->ip_dst), output:2
> > +priority=10 in_port=2,ip,actions=clone(mod_dl_src(ae:c6:7e:54:8d:4d),mod_dl_dst(50:54:00:00:00:0b),set_field:192.168.4.4->ip_dst, controller), output:1
> > +])
> > +AT_CHECK([ovs-ofctl add-flows br0 flows.txt])
> > +
> > +AT_CHECK([ovs-ofctl monitor br0 65534 invalid_ttl --detach --no-chdir --pidfile 2> ofctl_monitor.log])
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 10.1.1.2 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +AT_CHECK([cat ofctl_monitor.log | STRIP_MONITOR_CSUM], [0], [dnl
> > +icmp,vlan_tci=0x0000,dl_src=ae:c6:7e:54:8d:4d,dl_dst=50:54:00:00:00:0b,nw_src=10.1.1.2,nw_dst=192.168.4.4,nw_tos=0,nw_ecn=0,nw_ttl=64,icmp_type=0,icmp_code=0 icmp_csum: <skip>
> > +icmp,vlan_tci=0x0000,dl_src=ae:c6:7e:54:8d:4d,dl_dst=50:54:00:00:00:0b,nw_src=10.1.1.2,nw_dst=192.168.4.4,nw_tos=0,nw_ecn=0,nw_ttl=64,icmp_type=0,icmp_code=0 icmp_csum: <skip>
> > +icmp,vlan_tci=0x0000,dl_src=ae:c6:7e:54:8d:4d,dl_dst=50:54:00:00:00:0b,nw_src=10.1.1.2,nw_dst=192.168.4.4,nw_tos=0,nw_ecn=0,nw_ttl=64,icmp_type=0,icmp_code=0 icmp_csum: <skip>
> > +])
> > +
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([datapath - basic truncate action])
> > +AT_SKIP_IF([test $HAVE_NC = no])
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +AT_CHECK([ovs-ofctl del-flows br0])
> > +
> > +dnl Create p0 and ovs-p0(1)
> > +ADD_NAMESPACES(at_ns0)
> > +ADD_VETH_AFXDP(p0, at_ns0, br0, "10.1.1.1/24")
> > +NS_CHECK_EXEC([at_ns0], [ip link set dev p0 address e6:66:c1:11:11:11])
> > +NS_CHECK_EXEC([at_ns0], [arp -s 10.1.1.2 e6:66:c1:22:22:22])
> > +
> > +dnl Create p1(3) and ovs-p1(2), packets received from ovs-p1 will appear in p1
> > +AT_CHECK([ip link add p1 type veth peer name ovs-p1])
> > +on_exit 'ip link del ovs-p1'
> > +AT_CHECK([ip link set dev ovs-p1 up])
> > +AT_CHECK([ip link set dev p1 up])
> > +AT_CHECK([ovs-vsctl add-port br0 ovs-p1 -- set interface ovs-p1 ofport_request=2])
> > +dnl Use p1 to check the truncated packet
> > +AT_CHECK([ovs-vsctl add-port br0 p1 -- set interface p1 ofport_request=3])
> > +
> > +dnl Create p2(5) and ovs-p2(4)
> > +AT_CHECK([ip link add p2 type veth peer name ovs-p2])
> > +on_exit 'ip link del ovs-p2'
> > +AT_CHECK([ip link set dev ovs-p2 up])
> > +AT_CHECK([ip link set dev p2 up])
> > +AT_CHECK([ovs-vsctl add-port br0 ovs-p2 -- set interface ovs-p2 ofport_request=4])
> > +dnl Use p2 to check the truncated packet
> > +AT_CHECK([ovs-vsctl add-port br0 p2 -- set interface p2 ofport_request=5])
> > +
> > +dnl basic test
> > +AT_CHECK([ovs-ofctl del-flows br0])
> > +AT_DATA([flows.txt], [dnl
> > +in_port=3 dl_dst=e6:66:c1:22:22:22 actions=drop
> > +in_port=5 dl_dst=e6:66:c1:22:22:22 actions=drop
> > +in_port=1 dl_dst=e6:66:c1:22:22:22 actions=output(port=2,max_len=100),output:4
> > +])
> > +AT_CHECK([ovs-ofctl add-flows br0 flows.txt])
> > +
> > +dnl use this file as payload file for ncat
> > +AT_CHECK([dd if=/dev/urandom of=payload200.bin bs=200 count=1 2> /dev/null])
> > +on_exit 'rm -f payload200.bin'
> > +NS_CHECK_EXEC([at_ns0], [nc $NC_EOF_OPT -u 10.1.1.2 1234 < payload200.bin])
> > +
> > +dnl packet with truncated size
> > +AT_CHECK([ovs-appctl revalidator/purge], [0])
> > +AT_CHECK([ovs-ofctl dump-flows br0 table=0 | grep "in_port=3" | sed -n 's/.*\(n\_bytes=[[0-9]]*\).*/\1/p'], [0], [dnl
> > +n_bytes=100
> > +])
> > +dnl packet with original size
> > +AT_CHECK([ovs-appctl revalidator/purge], [0])
> > +AT_CHECK([ovs-ofctl dump-flows br0 table=0 | grep "in_port=5" | sed -n 's/.*\(n\_bytes=[[0-9]]*\).*/\1/p'], [0], [dnl
> > +n_bytes=242
> > +])
> > +
> > +dnl more complicated output actions
> > +AT_CHECK([ovs-ofctl del-flows br0])
> > +AT_DATA([flows.txt], [dnl
> > +in_port=3 dl_dst=e6:66:c1:22:22:22 actions=drop
> > +in_port=5 dl_dst=e6:66:c1:22:22:22 actions=drop
> > +in_port=1 dl_dst=e6:66:c1:22:22:22 actions=output(port=2,max_len=100),output:4,output(port=2,max_len=100),output(port=4,max_len=100),output:2,output(port=4,max_len=200),output(port=2,max_len=65535)
> > +])
> > +AT_CHECK([ovs-ofctl add-flows br0 flows.txt])
> > +
> > +NS_CHECK_EXEC([at_ns0], [nc $NC_EOF_OPT -u 10.1.1.2 1234 < payload200.bin])
> > +
> > +dnl 100 + 100 + 242 + min(65535,242) = 684
> > +AT_CHECK([ovs-appctl revalidator/purge], [0])
> > +AT_CHECK([ovs-ofctl dump-flows br0 table=0 | grep "in_port=3" | sed -n 's/.*\(n\_bytes=[[0-9]]*\).*/\1/p'], [0], [dnl
> > +n_bytes=684
> > +])
> > +dnl 242 + 100 + min(242,200) = 542
> > +AT_CHECK([ovs-ofctl dump-flows br0 table=0 | grep "in_port=5" | sed -n 's/.*\(n\_bytes=[[0-9]]*\).*/\1/p'], [0], [dnl
> > +n_bytes=542
> > +])
> > +
> > +dnl SLOW_ACTION: disable kernel datapath truncate support
> > +dnl Repeat the test above, but exercise the SLOW_ACTION code path
> > +AT_CHECK([ovs-appctl dpif/set-dp-features br0 trunc false], [0])
> > +
> > +dnl SLOW_ACTION test1: check datapatch actions
> > +AT_CHECK([ovs-ofctl del-flows br0])
> > +AT_CHECK([ovs-ofctl add-flows br0 flows.txt])
> > +
> > +AT_CHECK([ovs-appctl ofproto/trace br0 "in_port=1,dl_type=0x800,dl_src=e6:66:c1:11:11:11,dl_dst=e6:66:c1:22:22:22,nw_src=192.168.0.1,nw_dst=192.168.0.2,nw_proto=6,tp_src=8,tp_dst=9"], [0], [stdout])
> > +AT_CHECK([tail -3 stdout], [0],
> > +[Datapath actions: trunc(100),3,5,trunc(100),3,trunc(100),5,3,trunc(200),5,trunc(65535),3
> > +This flow is handled by the userspace slow path because it:
> > + - Uses action(s) not supported by datapath.
> > +])
> > +
> > +dnl SLOW_ACTION test2: check actual packet truncate
> > +AT_CHECK([ovs-ofctl del-flows br0])
> > +AT_CHECK([ovs-ofctl add-flows br0 flows.txt])
> > +NS_CHECK_EXEC([at_ns0], [nc $NC_EOF_OPT -u 10.1.1.2 1234 < payload200.bin])
> > +
> > +dnl 100 + 100 + 242 + min(65535,242) = 684
> > +AT_CHECK([ovs-appctl revalidator/purge], [0])
> > +AT_CHECK([ovs-ofctl dump-flows br0 table=0 | grep "in_port=3" | sed -n 's/.*\(n\_bytes=[[0-9]]*\).*/\1/p'], [0], [dnl
> > +n_bytes=684
> > +])
> > +
> > +dnl 242 + 100 + min(242,200) = 542
> > +AT_CHECK([ovs-ofctl dump-flows br0 table=0 | grep "in_port=5" | sed -n 's/.*\(n\_bytes=[[0-9]]*\).*/\1/p'], [0], [dnl
> > +n_bytes=542
> > +])
> > +
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +
> > +AT_BANNER([conntrack])
> > +
> > +AT_SETUP([conntrack - controller])
> > +CHECK_CONNTRACK()
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +AT_CHECK([ovs-appctl vlog/set dpif:dbg dpif_netdev:dbg ofproto_dpif_upcall:dbg])
> > +
> > +ADD_NAMESPACES(at_ns0, at_ns1)
> > +
> > +ADD_VETH_AFXDP(p0, at_ns0, br0, "10.1.1.1/24")
> > +ADD_VETH_AFXDP(p1, at_ns1, br0, "10.1.1.2/24")
> > +
> > +dnl Allow any traffic from ns0->ns1. Only allow nd, return traffic from ns1->ns0.
> > +AT_DATA([flows.txt], [dnl
> > +priority=1,action=drop
> > +priority=10,arp,action=normal
> > +priority=100,in_port=1,udp,action=ct(commit),controller
> > +priority=100,in_port=2,ct_state=-trk,udp,action=ct(table=0)
> > +priority=100,in_port=2,ct_state=+trk+est,udp,action=controller
> > +])
> > +
> > +AT_CHECK([ovs-ofctl --bundle add-flows br0 flows.txt])
> > +
> > +AT_CAPTURE_FILE([ofctl_monitor.log])
> > +AT_CHECK([ovs-ofctl monitor br0 65534 invalid_ttl --detach --no-chdir --pidfile 2> ofctl_monitor.log])
> > +
> > +dnl Send an unsolicited reply from port 2. This should be dropped.
> > +AT_CHECK([ovs-ofctl -O OpenFlow13 packet-out br0 2 ct\(table=0\) '50540000000a50540000000908004500001c000000000011a4cd0a0101020a0101010002000100080000'])
> > +
> > +dnl OK, now start a new connection from port 1.
> > +AT_CHECK([ovs-ofctl -O OpenFlow13 packet-out br0 1 ct\(commit\),controller '50540000000a50540000000908004500001c000000000011a4cd0a0101010a0101020001000200080000'])
> > +
> > +dnl Now try a reply from port 2.
> > +AT_CHECK([ovs-ofctl -O OpenFlow13 packet-out br0 2 ct\(table=0\) '50540000000a50540000000908004500001c000000000011a4cd0a0101020a0101010002000100080000'])
> > +
> > +dnl Check this output. We only see the latter two packets, not the first.
> > +AT_CHECK([cat ofctl_monitor.log], [0], [dnl
> > +NXT_PACKET_IN2 (xid=0x0): total_len=42 in_port=1 (via action) data_len=42 (unbuffered)
> > +udp,vlan_tci=0x0000,dl_src=50:54:00:00:00:09,dl_dst=50:54:00:00:00:0a,nw_src=10.1.1.1,nw_dst=10.1.1.2,nw_tos=0,nw_ecn=0,nw_ttl=0,tp_src=1,tp_dst=2 udp_csum:0
> > +NXT_PACKET_IN2 (xid=0x0): cookie=0x0 total_len=42 ct_state=est|rpl|trk,ct_nw_src=10.1.1.1,ct_nw_dst=10.1.1.2,ct_nw_proto=17,ct_tp_src=1,ct_tp_dst=2,ip,in_port=2 (via action) data_len=42 (unbuffered)
> > +udp,vlan_tci=0x0000,dl_src=50:54:00:00:00:09,dl_dst=50:54:00:00:00:0a,nw_src=10.1.1.2,nw_dst=10.1.1.1,nw_tos=0,nw_ecn=0,nw_ttl=0,tp_src=2,tp_dst=1 udp_csum:0
> > +])
> > +
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([conntrack - force commit])
> > +CHECK_CONNTRACK()
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +AT_CHECK([ovs-appctl vlog/set dpif:dbg dpif_netdev:dbg ofproto_dpif_upcall:dbg])
> > +
> > +ADD_NAMESPACES(at_ns0, at_ns1)
> > +
> > +ADD_VETH_AFXDP(p0, at_ns0, br0, "10.1.1.1/24")
> > +ADD_VETH_AFXDP(p1, at_ns1, br0, "10.1.1.2/24")
> > +
> > +AT_DATA([flows.txt], [dnl
> > +priority=1,action=drop
> > +priority=10,arp,action=normal
> > +priority=100,in_port=1,udp,action=ct(force,commit),controller
> > +priority=100,in_port=2,ct_state=-trk,udp,action=ct(table=0)
> > +priority=100,in_port=2,ct_state=+trk+est,udp,action=ct(force,commit,table=1)
> > +table=1,in_port=2,ct_state=+trk,udp,action=controller
> > +])
> > +
> > +AT_CHECK([ovs-ofctl --bundle add-flows br0 flows.txt])
> > +
> > +AT_CAPTURE_FILE([ofctl_monitor.log])
> > +AT_CHECK([ovs-ofctl monitor br0 65534 invalid_ttl --detach --no-chdir --pidfile 2> ofctl_monitor.log])
> > +
> > +dnl Send an unsolicited reply from port 2. This should be dropped.
> > +AT_CHECK([ovs-ofctl -O OpenFlow13 packet-out br0 "in_port=2 packet=50540000000a50540000000908004500001c000000000011a4cd0a0101020a0101010002000100080000 actions=resubmit(,0)"])
> > +
> > +dnl OK, now start a new connection from port 1.
> > +AT_CHECK([ovs-ofctl -O OpenFlow13 packet-out br0 "in_port=1 packet=50540000000a50540000000908004500001c000000000011a4cd0a0101010a0101020001000200080000 actions=resubmit(,0)"])
> > +
> > +dnl Now try a reply from port 2.
> > +AT_CHECK([ovs-ofctl -O OpenFlow13 packet-out br0 "in_port=2 packet=50540000000a50540000000908004500001c000000000011a4cd0a0101020a0101010002000100080000 actions=resubmit(,0)"])
> > +
> > +AT_CHECK([ovs-appctl revalidator/purge], [0])
> > +
> > +dnl Check this output. We only see the latter two packets, not the first.
> > +AT_CHECK([cat ofctl_monitor.log], [0], [dnl
> > +NXT_PACKET_IN2 (xid=0x0): cookie=0x0 total_len=42 in_port=1 (via action) data_len=42 (unbuffered)
> > +udp,vlan_tci=0x0000,dl_src=50:54:00:00:00:09,dl_dst=50:54:00:00:00:0a,nw_src=10.1.1.1,nw_dst=10.1.1.2,nw_tos=0,nw_ecn=0,nw_ttl=0,tp_src=1,tp_dst=2 udp_csum:0
> > +NXT_PACKET_IN2 (xid=0x0): table_id=1 cookie=0x0 total_len=42 ct_state=new|trk,ct_nw_src=10.1.1.2,ct_nw_dst=10.1.1.1,ct_nw_proto=17,ct_tp_src=2,ct_tp_dst=1,ip,in_port=2 (via action) data_len=42 (unbuffered)
> > +udp,vlan_tci=0x0000,dl_src=50:54:00:00:00:09,dl_dst=50:54:00:00:00:0a,nw_src=10.1.1.2,nw_dst=10.1.1.1,nw_tos=0,nw_ecn=0,nw_ttl=0,tp_src=2,tp_dst=1 udp_csum:0
> > +])
> > +
> > +dnl
> > +dnl Check that the directionality has been changed by force commit.
> > +dnl
> > +AT_CHECK([ovs-appctl dpctl/dump-conntrack | grep "orig=.src=10\.1\.1\.2,"], [], [dnl
> > +udp,orig=(src=10.1.1.2,dst=10.1.1.1,sport=2,dport=1),reply=(src=10.1.1.1,dst=10.1.1.2,sport=1,dport=2)
> > +])
> > +
> > +dnl OK, now send another packet from port 1 and see that it switches again
> > +AT_CHECK([ovs-ofctl -O OpenFlow13 packet-out br0 "in_port=1 packet=50540000000a50540000000908004500001c000000000011a4cd0a0101010a0101020001000200080000 actions=resubmit(,0)"])
> > +AT_CHECK([ovs-appctl revalidator/purge], [0])
> > +
> > +AT_CHECK([ovs-appctl dpctl/dump-conntrack | grep "orig=.src=10\.1\.1\.1,"], [], [dnl
> > +udp,orig=(src=10.1.1.1,dst=10.1.1.2,sport=1,dport=2),reply=(src=10.1.1.2,dst=10.1.1.1,sport=2,dport=1)
> > +])
> > +
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([conntrack - ct flush by 5-tuple])
> > +CHECK_CONNTRACK()
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +
> > +ADD_NAMESPACES(at_ns0, at_ns1)
> > +
> > +ADD_VETH_AFXDP(p0, at_ns0, br0, "10.1.1.1/24")
> > +ADD_VETH_AFXDP(p1, at_ns1, br0, "10.1.1.2/24")
> > +
> > +AT_DATA([flows.txt], [dnl
> > +priority=1,action=drop
> > +priority=10,arp,action=normal
> > +priority=100,in_port=1,udp,action=ct(commit),2
> > +priority=100,in_port=2,udp,action=ct(zone=5,commit),1
> > +priority=100,in_port=1,icmp,action=ct(commit),2
> > +priority=100,in_port=2,icmp,action=ct(zone=5,commit),1
> > +])
> > +
> > +AT_CHECK([ovs-ofctl --bundle add-flows br0 flows.txt])
> > +
> > +dnl Test UDP from port 1
> > +AT_CHECK([ovs-ofctl -O OpenFlow13 packet-out br0 "in_port=1 packet=50540000000a50540000000908004500001c000000000011a4cd0a0101010a0101020001000200080000 actions=resubmit(,0)"])
> > +
> > +AT_CHECK([ovs-appctl dpctl/dump-conntrack | grep "orig=.src=10\.1\.1\.1,"], [], [dnl
> > +udp,orig=(src=10.1.1.1,dst=10.1.1.2,sport=1,dport=2),reply=(src=10.1.1.2,dst=10.1.1.1,sport=2,dport=1)
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/flush-conntrack 'ct_nw_src=10.1.1.2,ct_nw_dst=10.1.1.1,ct_nw_proto=17,ct_tp_src=2,ct_tp_dst=1'])
> > +
> > +AT_CHECK([ovs-appctl dpctl/dump-conntrack | grep "orig=.src=10\.1\.1\.1,"], [1], [dnl
> > +])
> > +
> > +dnl Test UDP from port 2
> > +AT_CHECK([ovs-ofctl -O OpenFlow13 packet-out br0 "in_port=2 packet=50540000000a50540000000908004500001c000000000011a4cd0a0101020a0101010002000100080000 actions=resubmit(,0)"])
> > +
> > +AT_CHECK([ovs-appctl dpctl/dump-conntrack | grep "orig=.src=10\.1\.1\.2,"], [0], [dnl
> > +udp,orig=(src=10.1.1.2,dst=10.1.1.1,sport=2,dport=1),reply=(src=10.1.1.1,dst=10.1.1.2,sport=1,dport=2),zone=5
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/flush-conntrack zone=5 'ct_nw_src=10.1.1.1,ct_nw_dst=10.1.1.2,ct_nw_proto=17,ct_tp_src=1,ct_tp_dst=2'])
> > +
> > +AT_CHECK([ovs-appctl dpctl/dump-conntrack | FORMAT_CT(10.1.1.2)], [0], [dnl
> > +])
> > +
> > +dnl Test ICMP traffic
> > +NS_CHECK_EXEC([at_ns1], [ping -q -c 3 -i 0.3 -w 2 10.1.1.1 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/dump-conntrack | grep "orig=.src=10\.1\.1\.2,"], [0], [stdout])
> > +AT_CHECK([cat stdout | FORMAT_CT(10.1.1.1)], [0],[dnl
> > +icmp,orig=(src=10.1.1.2,dst=10.1.1.1,id=<cleared>,type=8,code=0),reply=(src=10.1.1.1,dst=10.1.1.2,id=<cleared>,type=0,code=0),zone=5
> > +])
> > +
> > +ICMP_ID=`cat stdout | cut -d ',' -f4 | cut -d '=' -f2`
> > +ICMP_TUPLE=ct_nw_src=10.1.1.2,ct_nw_dst=10.1.1.1,ct_nw_proto=1,icmp_id=$ICMP_ID,icmp_type=8,icmp_code=0
> > +AT_CHECK([ovs-appctl dpctl/flush-conntrack zone=5 $ICMP_TUPLE])
> > +
> > +AT_CHECK([ovs-appctl dpctl/dump-conntrack | grep "orig=.src=10\.1\.1\.2,"], [1], [dnl
> > +])
> > +
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([conntrack - IPv4 ping])
> > +CHECK_CONNTRACK()
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +
> > +ADD_NAMESPACES(at_ns0, at_ns1)
> > +
> > +ADD_VETH_AFXDP(p0, at_ns0, br0, "10.1.1.1/24")
> > +ADD_VETH_AFXDP(p1, at_ns1, br0, "10.1.1.2/24")
> > +
> > +dnl Allow any traffic from ns0->ns1. Only allow nd, return traffic from ns1->ns0.
> > +AT_DATA([flows.txt], [dnl
> > +priority=1,action=drop
> > +priority=10,arp,action=normal
> > +priority=100,in_port=1,icmp,action=ct(commit),2
> > +priority=100,in_port=2,icmp,ct_state=-trk,action=ct(table=0)
> > +priority=100,in_port=2,icmp,ct_state=+trk+est,action=1
> > +])
> > +
> > +AT_CHECK([ovs-ofctl --bundle add-flows br0 flows.txt])
> > +
> > +dnl Pings from ns0->ns1 should work fine.
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 10.1.1.2 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/dump-conntrack | FORMAT_CT(10.1.1.2)], [0], [dnl
> > +icmp,orig=(src=10.1.1.1,dst=10.1.1.2,id=<cleared>,type=8,code=0),reply=(src=10.1.1.2,dst=10.1.1.1,id=<cleared>,type=0,code=0)
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/flush-conntrack])
> > +
> > +dnl Pings from ns1->ns0 should fail.
> > +NS_CHECK_EXEC([at_ns1], [ping -q -c 3 -i 0.3 -w 2 10.1.1.1 | FORMAT_PING], [0], [dnl
> > +7 packets transmitted, 0 received, 100% packet loss, time 0ms
> > +])
> > +
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([conntrack - get_nconns and get/set_maxconns])
> > +CHECK_CONNTRACK()
> > +CHECK_CT_DPIF_SET_GET_MAXCONNS()
> > +CHECK_CT_DPIF_GET_NCONNS()
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +
> > +ADD_NAMESPACES(at_ns0, at_ns1)
> > +
> > +ADD_VETH_AFXDP(p0, at_ns0, br0, "10.1.1.1/24")
> > +ADD_VETH_AFXDP(p1, at_ns1, br0, "10.1.1.2/24")
> > +
> > +dnl Allow any traffic from ns0->ns1. Only allow nd, return traffic from ns1->ns0.
> > +AT_DATA([flows.txt], [dnl
> > +priority=1,action=drop
> > +priority=10,arp,action=normal
> > +priority=100,in_port=1,icmp,action=ct(commit),2
> > +priority=100,in_port=2,icmp,ct_state=-trk,action=ct(table=0)
> > +priority=100,in_port=2,icmp,ct_state=+trk+est,action=1
> > +])
> > +
> > +AT_CHECK([ovs-ofctl --bundle add-flows br0 flows.txt])
> > +
> > +dnl Pings from ns0->ns1 should work fine.
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 10.1.1.2 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/dump-conntrack | FORMAT_CT(10.1.1.2)], [0], [dnl
> > +icmp,orig=(src=10.1.1.1,dst=10.1.1.2,id=<cleared>,type=8,code=0),reply=(src=10.1.1.2,dst=10.1.1.1,id=<cleared>,type=0,code=0)
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/ct-set-maxconns one-bad-dp], [2], [], [dnl
> > +ovs-vswitchd: maxconns missing or malformed (Invalid argument)
> > +ovs-appctl: ovs-vswitchd: server returned an error
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/ct-set-maxconns a], [2], [], [dnl
> > +ovs-vswitchd: maxconns missing or malformed (Invalid argument)
> > +ovs-appctl: ovs-vswitchd: server returned an error
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/ct-set-maxconns one-bad-dp 10], [2], [], [dnl
> > +ovs-vswitchd: datapath not found (Invalid argument)
> > +ovs-appctl: ovs-vswitchd: server returned an error
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/ct-get-maxconns one-bad-dp], [2], [], [dnl
> > +ovs-vswitchd: datapath not found (Invalid argument)
> > +ovs-appctl: ovs-vswitchd: server returned an error
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/ct-get-nconns one-bad-dp], [2], [], [dnl
> > +ovs-vswitchd: datapath not found (Invalid argument)
> > +ovs-appctl: ovs-vswitchd: server returned an error
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/ct-get-nconns], [], [dnl
> > +1
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/ct-get-maxconns], [], [dnl
> > +3000000
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/ct-set-maxconns 10], [], [dnl
> > +setting maxconns successful
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/ct-get-maxconns], [], [dnl
> > +10
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/flush-conntrack])
> > +
> > +AT_CHECK([ovs-appctl dpctl/ct-get-nconns], [], [dnl
> > +0
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/ct-get-maxconns], [], [dnl
> > +10
> > +])
> > +
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([conntrack - IPv6 ping])
> > +CHECK_CONNTRACK()
> > +OVS_TRAFFIC_VSWITCHD_START()
> > +
> > +ADD_NAMESPACES(at_ns0, at_ns1)
> > +
> > +ADD_VETH_AFXDP(p0, at_ns0, br0, "fc00::1/96")
> > +ADD_VETH_AFXDP(p1, at_ns1, br0, "fc00::2/96")
> > +
> > +AT_DATA([flows.txt], [dnl
> > +
> > +dnl ICMPv6 echo request and reply go to table 1. The rest of the traffic goes
> > +dnl through normal action.
> > +table=0,priority=10,icmp6,icmp_type=128,action=goto_table:1
> > +table=0,priority=10,icmp6,icmp_type=129,action=goto_table:1
> > +table=0,priority=1,action=normal
> > +
> > +dnl Allow everything from ns0->ns1. Only allow return traffic from ns1->ns0.
> > +table=1,priority=100,in_port=1,icmp6,action=ct(commit),2
> > +table=1,priority=100,in_port=2,icmp6,ct_state=-trk,action=ct(table=0)
> > +table=1,priority=100,in_port=2,icmp6,ct_state=+trk+est,action=1
> > +table=1,priority=1,action=drop
> > +])
> > +
> > +AT_CHECK([ovs-ofctl --bundle add-flows br0 flows.txt])
> > +
> > +OVS_WAIT_UNTIL([ip netns exec at_ns0 ping6 -c 1 fc00::2])
> > +
> > +dnl The above ping creates state in the connection tracker. We're not
> > +dnl interested in that state.
> > +AT_CHECK([ovs-appctl dpctl/flush-conntrack])
> > +
> > +dnl Pings from ns1->ns0 should fail.
> > +NS_CHECK_EXEC([at_ns1], [ping6 -q -c 3 -i 0.3 -w 2 fc00::1 | FORMAT_PING], [0], [dnl
> > +7 packets transmitted, 0 received, 100% packet loss, time 0ms
> > +])
> > +
> > +dnl Pings from ns0->ns1 should work fine.
> > +NS_CHECK_EXEC([at_ns0], [ping6 -q -c 3 -i 0.3 -w 2 fc00::2 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +AT_CHECK([ovs-appctl dpctl/dump-conntrack | FORMAT_CT(fc00::2)], [0], [dnl
> > +icmpv6,orig=(src=fc00::1,dst=fc00::2,id=<cleared>,type=128,code=0),reply=(src=fc00::2,dst=fc00::1,id=<cleared>,type=129,code=0)
> > +])
> > +
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> >
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