* [PATCH v2 2/2] selftests/net: fix opening object file failed
2022-11-15 10:23 [PATCH v2 0/2] some fixes for selftest/net Wang Yufen
2022-11-15 10:23 ` [PATCH v2 1/2] selftests/net: fix missing xdp_dummy Wang Yufen
@ 2022-11-15 10:23 ` Wang Yufen
2022-11-16 22:08 ` Saeed Mahameed
2022-11-18 18:57 ` Martin KaFai Lau
1 sibling, 2 replies; 8+ messages in thread
From: Wang Yufen @ 2022-11-15 10:23 UTC (permalink / raw)
To: netdev, bpf
Cc: davem, edumazet, kuba, pabeni, shuah, andrii, mykolal, ast,
daniel, martin.lau, Wang Yufen
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset="y", Size: 61914 bytes --]
The program file used in the udpgro_frglist testcase is "../bpf/nat6to4.o",
but the actual nat6to4.o file is in "bpf/" not "../bpf".
The following error occurs:
Error opening object ../bpf/nat6to4.o: No such file or directory
Cannot initialize ELF context!
Unable to load program
In addition, all the kernel bpf source files are centred under the
subdir "progs" after commit bd4aed0ee73c ("selftests: bpf: centre
kernel bpf objects under new subdir "progs""). So mv nat6to4.c to
"../bpf/progs" and use "../bpf/nat6to4.bpf.o". And also move the
test program to selftests/bpf.
Fixes: edae34a3ed92 ("selftests net: add UDP GRO fraglist + bpf self-tests")
Signed-off-by: Wang Yufen <wangyufen@huawei.com>
---
tools/testing/selftests/bpf/Makefile | 7 +-
tools/testing/selftests/bpf/in_netns.sh | 23 +
.../testing/selftests/bpf/progs/nat6to4_egress4.c | 184 ++++++
.../testing/selftests/bpf/progs/nat6to4_ingress6.c | 149 +++++
tools/testing/selftests/bpf/test_udpgro_frglist.sh | 110 ++++
tools/testing/selftests/bpf/udpgso_bench_rx.c | 409 ++++++++++++
tools/testing/selftests/bpf/udpgso_bench_tx.c | 712 +++++++++++++++++++++
tools/testing/selftests/net/Makefile | 2 -
tools/testing/selftests/net/bpf/Makefile | 14 -
tools/testing/selftests/net/bpf/nat6to4.c | 285 ---------
tools/testing/selftests/net/udpgro_frglist.sh | 103 ---
11 files changed, 1592 insertions(+), 406 deletions(-)
create mode 100755 tools/testing/selftests/bpf/in_netns.sh
create mode 100644 tools/testing/selftests/bpf/progs/nat6to4_egress4.c
create mode 100644 tools/testing/selftests/bpf/progs/nat6to4_ingress6.c
create mode 100755 tools/testing/selftests/bpf/test_udpgro_frglist.sh
create mode 100644 tools/testing/selftests/bpf/udpgso_bench_rx.c
create mode 100644 tools/testing/selftests/bpf/udpgso_bench_tx.c
delete mode 100644 tools/testing/selftests/net/bpf/Makefile
delete mode 100644 tools/testing/selftests/net/bpf/nat6to4.c
delete mode 100755 tools/testing/selftests/net/udpgro_frglist.sh
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index e6cf21f..e81e32d 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -39,7 +39,9 @@ TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test
test_sock test_sockmap get_cgroup_id_user \
test_cgroup_storage \
test_tcpnotify_user test_sysctl \
- test_progs-no_alu32
+ test_progs-no_alu32 \
+ udpgso_bench_rx \
+ udpgso_bench_tx
# Also test bpf-gcc, if present
ifneq ($(BPF_GCC),)
@@ -73,7 +75,8 @@ TEST_PROGS := test_kmod.sh \
test_bpftool.sh \
test_bpftool_metadata.sh \
test_doc_build.sh \
- test_xsk.sh
+ test_xsk.sh \
+ test_udpgro_frglist.sh
TEST_PROGS_EXTENDED := with_addr.sh \
with_tunnels.sh ima_setup.sh verify_sig_setup.sh \
diff --git a/tools/testing/selftests/bpf/in_netns.sh b/tools/testing/selftests/bpf/in_netns.sh
new file mode 100755
index 0000000..88795b5
--- /dev/null
+++ b/tools/testing/selftests/bpf/in_netns.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Execute a subprocess in a network namespace
+
+set -e
+
+readonly NETNS="ns-$(mktemp -u XXXXXX)"
+
+setup() {
+ ip netns add "${NETNS}"
+ ip -netns "${NETNS}" link set lo up
+}
+
+cleanup() {
+ ip netns del "${NETNS}"
+}
+
+trap cleanup EXIT
+setup
+
+ip netns exec "${NETNS}" "$@"
+exit "$?"
diff --git a/tools/testing/selftests/bpf/progs/nat6to4_egress4.c b/tools/testing/selftests/bpf/progs/nat6to4_egress4.c
new file mode 100644
index 0000000..9ebb2b2
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/nat6to4_egress4.c
@@ -0,0 +1,184 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * This code is taken from the Android Open Source Project and the author
+ * (Maciej Żenczykowski) has gave permission to relicense it under the
+ * GPLv2. Therefore this program is free software;
+ * You can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 2 as published by the Free Software
+ * Foundation
+
+ * The original headers, including the original license headers, are
+ * included below for completeness.
+ *
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * 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 <linux/bpf.h>
+#include <linux/if.h>
+#include <linux/if_ether.h>
+#include <linux/if_packet.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/pkt_cls.h>
+#include <linux/swab.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+
+#include <linux/udp.h>
+
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_endian.h>
+
+#define IP_DF 0x4000 // Flag: "Don't Fragment"
+
+SEC("tc")
+int sched_cls_egress4_snat4_prog(struct __sk_buff *skb)
+{
+ const int l2_header_size = sizeof(struct ethhdr);
+ void *data = (void *)(long)skb->data;
+ const void *data_end = (void *)(long)skb->data_end;
+ const struct ethhdr *const eth = data; // used iff is_ethernet
+ const struct iphdr *const ip4 = (void *)(eth + 1);
+
+ // Must be meta-ethernet IPv4 frame
+ if (skb->protocol != bpf_htons(ETH_P_IP))
+ return TC_ACT_OK;
+
+ // Must have ipv4 header
+ if (data + l2_header_size + sizeof(struct ipv6hdr) > data_end)
+ return TC_ACT_OK;
+
+ // Ethertype - if present - must be IPv4
+ if (eth->h_proto != bpf_htons(ETH_P_IP))
+ return TC_ACT_OK;
+
+ // IP version must be 4
+ if (ip4->version != 4)
+ return TC_ACT_OK;
+
+ // We cannot handle IP options, just standard 20 byte == 5 dword minimal IPv4 header
+ if (ip4->ihl != 5)
+ return TC_ACT_OK;
+
+ // Maximum IPv6 payload length that can be translated to IPv4
+ if (bpf_htons(ip4->tot_len) > 0xFFFF - sizeof(struct ipv6hdr))
+ return TC_ACT_OK;
+
+ // Calculate the IPv4 one's complement checksum of the IPv4 header.
+ __wsum sum4 = 0;
+
+ for (int i = 0; i < sizeof(*ip4) / sizeof(__u16); ++i)
+ sum4 += ((__u16 *)ip4)[i];
+
+ // Note that sum4 is guaranteed to be non-zero by virtue of ip4->version == 4
+ sum4 = (sum4 & 0xFFFF) + (sum4 >> 16); // collapse u32 into range 1 .. 0x1FFFE
+ sum4 = (sum4 & 0xFFFF) + (sum4 >> 16); // collapse any potential carry into u16
+ // for a correct checksum we should get *a* zero, but sum4 must be positive, ie 0xFFFF
+ if (sum4 != 0xFFFF)
+ return TC_ACT_OK;
+
+ // Minimum IPv4 total length is the size of the header
+ if (bpf_ntohs(ip4->tot_len) < sizeof(*ip4))
+ return TC_ACT_OK;
+
+ // We are incapable of dealing with IPv4 fragments
+ if (ip4->frag_off & ~bpf_htons(IP_DF))
+ return TC_ACT_OK;
+
+ switch (ip4->protocol) {
+ case IPPROTO_TCP: // For TCP & UDP the checksum neutrality of the chosen IPv6
+ case IPPROTO_GRE: // address means there is no need to update their checksums.
+ case IPPROTO_ESP: // We do not need to bother looking at GRE/ESP headers,
+ break; // since there is never a checksum to update.
+
+ case IPPROTO_UDP: // See above comment, but must also have UDP header...
+ if (data + sizeof(*ip4) + sizeof(struct udphdr) > data_end)
+ return TC_ACT_OK;
+ const struct udphdr *uh = (const struct udphdr *)(ip4 + 1);
+ // If IPv4/UDP checksum is 0 then fallback to clatd so it can calculate the
+ // checksum. Otherwise the network or more likely the NAT64 gateway might
+ // drop the packet because in most cases IPv6/UDP packets with a zero checksum
+ // are invalid. See RFC 6935. TODO: calculate checksum via bpf_csum_diff()
+ if (!uh->check)
+ return TC_ACT_OK;
+ break;
+
+ default: // do not know how to handle anything else
+ return TC_ACT_OK;
+ }
+ struct ethhdr eth2; // used iff is_ethernet
+
+ eth2 = *eth; // Copy over the ethernet header (src/dst mac)
+ eth2.h_proto = bpf_htons(ETH_P_IPV6); // But replace the ethertype
+
+ struct ipv6hdr ip6 = {
+ .version = 6, // __u8:4
+ .priority = ip4->tos >> 4, // __u8:4
+ .flow_lbl = {(ip4->tos & 0xF) << 4, 0, 0}, // __u8[3]
+ .payload_len = bpf_htons(bpf_ntohs(ip4->tot_len) - 20), // __be16
+ .nexthdr = ip4->protocol, // __u8
+ .hop_limit = ip4->ttl, // __u8
+ };
+ ip6.saddr.in6_u.u6_addr32[0] = bpf_htonl(0x20010db8);
+ ip6.saddr.in6_u.u6_addr32[1] = 0;
+ ip6.saddr.in6_u.u6_addr32[2] = 0;
+ ip6.saddr.in6_u.u6_addr32[3] = bpf_htonl(1);
+ ip6.daddr.in6_u.u6_addr32[0] = bpf_htonl(0x20010db8);
+ ip6.daddr.in6_u.u6_addr32[1] = 0;
+ ip6.daddr.in6_u.u6_addr32[2] = 0;
+ ip6.daddr.in6_u.u6_addr32[3] = bpf_htonl(2);
+
+ // Calculate the IPv6 16-bit one's complement checksum of the IPv6 header.
+ __wsum sum6 = 0;
+ // We'll end up with a non-zero sum due to ip6.version == 6
+ for (int i = 0; i < sizeof(ip6) / sizeof(__u16); ++i)
+ sum6 += ((__u16 *)&ip6)[i];
+
+ // Packet mutations begin - point of no return, but if this first modification fails
+ // the packet is probably still pristine, so let clatd handle it.
+ if (bpf_skb_change_proto(skb, bpf_htons(ETH_P_IPV6), 0))
+ return TC_ACT_OK;
+
+ // This takes care of updating the skb->csum field for a CHECKSUM_COMPLETE packet.
+ // In such a case, skb->csum is a 16-bit one's complement sum of the entire payload,
+ // thus we need to subtract out the ipv4 header's sum, and add in the ipv6 header's sum.
+ // However, we've already verified the ipv4 checksum is correct and thus 0.
+ // Thus we only need to add the ipv6 header's sum.
+ //
+ // bpf_csum_update() always succeeds if the skb is CHECKSUM_COMPLETE and returns an error
+ // (-ENOTSUPP) if it isn't. So we just ignore the return code (see above for more details).
+ bpf_csum_update(skb, sum6);
+
+ // bpf_skb_change_proto() invalidates all pointers - reload them.
+ data = (void *)(long)skb->data;
+ data_end = (void *)(long)skb->data_end;
+
+ // I cannot think of any valid way for this error condition to trigger, however I do
+ // believe the explicit check is required to keep the in kernel ebpf verifier happy.
+ if (data + l2_header_size + sizeof(ip6) > data_end)
+ return TC_ACT_SHOT;
+
+ struct ethhdr *new_eth = data;
+
+ // Copy over the updated ethernet header
+ *new_eth = eth2;
+ // Copy over the new ipv4 header.
+ *(struct ipv6hdr *)(new_eth + 1) = ip6;
+ return TC_ACT_OK;
+}
+
+char _license[] SEC("license") = ("GPL");
diff --git a/tools/testing/selftests/bpf/progs/nat6to4_ingress6.c b/tools/testing/selftests/bpf/progs/nat6to4_ingress6.c
new file mode 100644
index 0000000..76a7b19
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/nat6to4_ingress6.c
@@ -0,0 +1,149 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * This code is taken from the Android Open Source Project and the author
+ * (Maciej Żenczykowski) has gave permission to relicense it under the
+ * GPLv2. Therefore this program is free software;
+ * You can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 2 as published by the Free Software
+ * Foundation
+
+ * The original headers, including the original license headers, are
+ * included below for completeness.
+ *
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * 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 <linux/bpf.h>
+#include <linux/if.h>
+#include <linux/if_ether.h>
+#include <linux/if_packet.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/pkt_cls.h>
+#include <linux/swab.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+
+#include <linux/udp.h>
+
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_endian.h>
+
+#define IP_DF 0x4000 // Flag: "Don't Fragment"
+
+SEC("tc")
+int sched_cls_ingress6_nat_6_prog(struct __sk_buff *skb)
+{
+ const int l2_header_size = sizeof(struct ethhdr);
+ void *data = (void *)(long)skb->data;
+ const void *data_end = (void *)(long)skb->data_end;
+ const struct ethhdr * const eth = data; // used iff is_ethernet
+ const struct ipv6hdr * const ip6 = (void *)(eth + 1);
+
+ // Require ethernet dst mac address to be our unicast address.
+ if (skb->pkt_type != PACKET_HOST)
+ return TC_ACT_OK;
+
+ // Must be meta-ethernet IPv6 frame
+ if (skb->protocol != bpf_htons(ETH_P_IPV6))
+ return TC_ACT_OK;
+
+ // Must have (ethernet and) ipv6 header
+ if (data + l2_header_size + sizeof(*ip6) > data_end)
+ return TC_ACT_OK;
+
+ // Ethertype - if present - must be IPv6
+ if (eth->h_proto != bpf_htons(ETH_P_IPV6))
+ return TC_ACT_OK;
+
+ // IP version must be 6
+ if (ip6->version != 6)
+ return TC_ACT_OK;
+ // Maximum IPv6 payload length that can be translated to IPv4
+ if (bpf_ntohs(ip6->payload_len) > 0xFFFF - sizeof(struct iphdr))
+ return TC_ACT_OK;
+ switch (ip6->nexthdr) {
+ case IPPROTO_TCP: // For TCP & UDP the checksum neutrality of the chosen IPv6
+ case IPPROTO_UDP: // address means there is no need to update their checksums.
+ case IPPROTO_GRE: // We do not need to bother looking at GRE/ESP headers,
+ case IPPROTO_ESP: // since there is never a checksum to update.
+ break;
+ default: // do not know how to handle anything else
+ return TC_ACT_OK;
+ }
+
+ struct ethhdr eth2; // used iff is_ethernet
+
+ eth2 = *eth; // Copy over the ethernet header (src/dst mac)
+ eth2.h_proto = bpf_htons(ETH_P_IP); // But replace the ethertype
+
+ struct iphdr ip = {
+ .version = 4, // u4
+ .ihl = sizeof(struct iphdr) / sizeof(__u32), // u4
+ .tos = (ip6->priority << 4) + (ip6->flow_lbl[0] >> 4), // u8
+ .tot_len = bpf_htons(bpf_ntohs(ip6->payload_len) + sizeof(struct iphdr)), // u16
+ .id = 0, // u16
+ .frag_off = bpf_htons(IP_DF), // u16
+ .ttl = ip6->hop_limit, // u8
+ .protocol = ip6->nexthdr, // u8
+ .check = 0, // u16
+ .saddr = 0x0201a8c0, // u32
+ .daddr = 0x0101a8c0, // u32
+ };
+
+ // Calculate the IPv4 one's complement checksum of the IPv4 header.
+ __wsum sum4 = 0;
+
+ for (int i = 0; i < sizeof(ip) / sizeof(__u16); ++i)
+ sum4 += ((__u16 *)&ip)[i];
+
+ // Note that sum4 is guaranteed to be non-zero by virtue of ip.version == 4
+ sum4 = (sum4 & 0xFFFF) + (sum4 >> 16); // collapse u32 into range 1 .. 0x1FFFE
+ sum4 = (sum4 & 0xFFFF) + (sum4 >> 16); // collapse any potential carry into u16
+ ip.check = (__u16)~sum4; // sum4 cannot be zero, so this is never 0xFFFF
+
+ // Calculate the *negative* IPv6 16-bit one's complement checksum of the IPv6 header.
+ __wsum sum6 = 0;
+ // We'll end up with a non-zero sum due to ip6->version == 6 (which has '0' bits)
+ for (int i = 0; i < sizeof(*ip6) / sizeof(__u16); ++i)
+ sum6 += ~((__u16 *)ip6)[i]; // note the bitwise negation
+
+ // Note that there is no L4 checksum update: we are relying on the checksum neutrality
+ // of the ipv6 address chosen by netd's ClatdController.
+
+ // Packet mutations begin - point of no return, but if this first modification fails
+ // the packet is probably still pristine, so let clatd handle it.
+ if (bpf_skb_change_proto(skb, bpf_htons(ETH_P_IP), 0))
+ return TC_ACT_OK;
+ bpf_csum_update(skb, sum6);
+
+ data = (void *)(long)skb->data;
+ data_end = (void *)(long)skb->data_end;
+ if (data + l2_header_size + sizeof(struct iphdr) > data_end)
+ return TC_ACT_SHOT;
+
+ struct ethhdr *new_eth = data;
+
+ // Copy over the updated ethernet header
+ *new_eth = eth2;
+
+ // Copy over the new ipv4 header.
+ *(struct iphdr *)(new_eth + 1) = ip;
+ return bpf_redirect(skb->ifindex, BPF_F_INGRESS);
+}
+
+char _license[] SEC("license") = ("GPL");
diff --git a/tools/testing/selftests/bpf/test_udpgro_frglist.sh b/tools/testing/selftests/bpf/test_udpgro_frglist.sh
new file mode 100755
index 0000000..95c92c4
--- /dev/null
+++ b/tools/testing/selftests/bpf/test_udpgro_frglist.sh
@@ -0,0 +1,110 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Run a series of udpgro benchmarks
+
+readonly PEER_NS="ns-peer-$(mktemp -u XXXXXX)"
+
+BPF_FILE="xdp_dummy.bpf.o"
+BPF_FILE_INGRESS="nat6to4_ingress6.bpf.o"
+BPF_FILE_EGRESS="nat6to4_egress4.bpf.o"
+
+cleanup() {
+ local -r jobs="$(jobs -p)"
+ local -r ns="$(ip netns list|grep $PEER_NS)"
+
+ [ -n "${jobs}" ] && kill -INT ${jobs} 2>/dev/null
+ [ -n "$ns" ] && ip netns del $ns 2>/dev/null
+}
+trap cleanup EXIT
+
+run_one() {
+ # use 'rx' as separator between sender args and receiver args
+ local -r all="$@"
+ local -r tx_args=${all%rx*}
+ local rx_args=${all#*rx}
+
+
+
+ ip netns add "${PEER_NS}"
+ ip -netns "${PEER_NS}" link set lo up
+ ip link add type veth
+ ip link set dev veth0 up
+ ip addr add dev veth0 192.168.1.2/24
+ ip addr add dev veth0 2001:db8::2/64 nodad
+
+ ip link set dev veth1 netns "${PEER_NS}"
+ ip -netns "${PEER_NS}" addr add dev veth1 192.168.1.1/24
+ ip -netns "${PEER_NS}" addr add dev veth1 2001:db8::1/64 nodad
+ ip -netns "${PEER_NS}" link set dev veth1 up
+ ip netns exec "${PEER_NS}" ethtool -K veth1 rx-gro-list on
+
+
+ ip -n "${PEER_NS}" link set veth1 xdp object ${BPF_FILE} section xdp
+ tc -n "${PEER_NS}" qdisc add dev veth1 clsact
+ tc -n "${PEER_NS}" filter add dev veth1 ingress prio 4 protocol ipv6 bpf object-file ${BPF_FILE_INGRESS} section tc direct-action
+ tc -n "${PEER_NS}" filter add dev veth1 egress prio 4 protocol ip bpf object-file ${BPF_FILE_EGRESS} section tc direct-action
+ echo ${rx_args}
+ ip netns exec "${PEER_NS}" ./udpgso_bench_rx ${rx_args} -r &
+
+ # Hack: let bg programs complete the startup
+ sleep 0.2
+ ./udpgso_bench_tx ${tx_args}
+}
+
+run_in_netns() {
+ local -r args=$@
+ echo ${args}
+ ./in_netns.sh $0 __subprocess ${args}
+}
+
+run_udp() {
+ local -r args=$@
+
+ echo "udp gso - over veth touching data"
+ run_in_netns ${args} -u -S 0 rx -4 -v
+
+ echo "udp gso and gro - over veth touching data"
+ run_in_netns ${args} -S 0 rx -4 -G
+}
+
+run_tcp() {
+ local -r args=$@
+
+ echo "tcp - over veth touching data"
+ run_in_netns ${args} -t rx -4 -t
+}
+
+run_all() {
+ local -r core_args="-l 4"
+ local -r ipv4_args="${core_args} -4 -D 192.168.1.1"
+ local -r ipv6_args="${core_args} -6 -D 2001:db8::1"
+
+ echo "ipv6"
+ run_tcp "${ipv6_args}"
+ run_udp "${ipv6_args}"
+}
+
+if [ ! -f ${BPF_FILE} ]; then
+ echo "Missing xdp_dummy helper. Build bpf selftest first"
+ exit -1
+fi
+
+if [ ! -f ${BPF_FILE_INGRESS} ]; then
+ echo "Missing nat6to4_ingress6 helper. Build bpf selftest first"
+ exit -1
+fi
+
+if [ ! -f ${BPF_FILE_EGRESS} ]; then
+ echo "Missing nat6to4_egress4 helper. Build bpf selftest first"
+ exit -1
+fi
+
+if [[ $# -eq 0 ]]; then
+ run_all
+elif [[ $1 == "__subprocess" ]]; then
+ shift
+ run_one $@
+else
+ run_in_netns $@
+fi
diff --git a/tools/testing/selftests/bpf/udpgso_bench_rx.c b/tools/testing/selftests/bpf/udpgso_bench_rx.c
new file mode 100644
index 0000000..6a19342
--- /dev/null
+++ b/tools/testing/selftests/bpf/udpgso_bench_rx.c
@@ -0,0 +1,409 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#define _GNU_SOURCE
+
+#include <arpa/inet.h>
+#include <error.h>
+#include <errno.h>
+#include <limits.h>
+#include <linux/errqueue.h>
+#include <linux/if_packet.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <net/ethernet.h>
+#include <net/if.h>
+#include <netinet/ip.h>
+#include <netinet/ip6.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <poll.h>
+#include <sched.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#ifndef UDP_GRO
+#define UDP_GRO 104
+#endif
+
+static int cfg_port = 8000;
+static bool cfg_tcp;
+static bool cfg_verify;
+static bool cfg_read_all;
+static bool cfg_gro_segment;
+static int cfg_family = PF_INET6;
+static int cfg_alen = sizeof(struct sockaddr_in6);
+static int cfg_expected_pkt_nr;
+static int cfg_expected_pkt_len;
+static int cfg_expected_gso_size;
+static int cfg_connect_timeout_ms;
+static int cfg_rcv_timeout_ms;
+static struct sockaddr_storage cfg_bind_addr;
+
+static bool interrupted;
+static unsigned long packets, bytes;
+
+static void sigint_handler(int signum)
+{
+ if (signum == SIGINT)
+ interrupted = true;
+}
+
+static void setup_sockaddr(int domain, const char *str_addr, void *sockaddr)
+{
+ struct sockaddr_in6 *addr6 = (void *) sockaddr;
+ struct sockaddr_in *addr4 = (void *) sockaddr;
+
+ switch (domain) {
+ case PF_INET:
+ addr4->sin_family = AF_INET;
+ addr4->sin_port = htons(cfg_port);
+ if (inet_pton(AF_INET, str_addr, &(addr4->sin_addr)) != 1)
+ error(1, 0, "ipv4 parse error: %s", str_addr);
+ break;
+ case PF_INET6:
+ addr6->sin6_family = AF_INET6;
+ addr6->sin6_port = htons(cfg_port);
+ if (inet_pton(AF_INET6, str_addr, &(addr6->sin6_addr)) != 1)
+ error(1, 0, "ipv6 parse error: %s", str_addr);
+ break;
+ default:
+ error(1, 0, "illegal domain");
+ }
+}
+
+static unsigned long gettimeofday_ms(void)
+{
+ struct timeval tv;
+
+ gettimeofday(&tv, NULL);
+ return (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
+}
+
+static void do_poll(int fd, int timeout_ms)
+{
+ struct pollfd pfd;
+ int ret;
+
+ pfd.events = POLLIN;
+ pfd.revents = 0;
+ pfd.fd = fd;
+
+ do {
+ ret = poll(&pfd, 1, 10);
+ if (interrupted)
+ break;
+ if (ret == -1)
+ error(1, errno, "poll");
+ if (ret == 0) {
+ if (!timeout_ms)
+ continue;
+
+ timeout_ms -= 10;
+ if (timeout_ms <= 0) {
+ interrupted = true;
+ break;
+ }
+
+ /* no events and more time to wait, do poll again */
+ continue;
+ }
+ if (pfd.revents != POLLIN)
+ error(1, errno, "poll: 0x%x expected 0x%x\n",
+ pfd.revents, POLLIN);
+ } while (!ret);
+}
+
+static int do_socket(bool do_tcp)
+{
+ int fd, val;
+
+ fd = socket(cfg_family, cfg_tcp ? SOCK_STREAM : SOCK_DGRAM, 0);
+ if (fd == -1)
+ error(1, errno, "socket");
+
+ val = 1 << 21;
+ if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof(val)))
+ error(1, errno, "setsockopt rcvbuf");
+ val = 1;
+ if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &val, sizeof(val)))
+ error(1, errno, "setsockopt reuseport");
+
+ if (bind(fd, (void *)&cfg_bind_addr, cfg_alen))
+ error(1, errno, "bind");
+
+ if (do_tcp) {
+ int accept_fd = fd;
+
+ if (listen(accept_fd, 1))
+ error(1, errno, "listen");
+
+ do_poll(accept_fd, cfg_connect_timeout_ms);
+ if (interrupted)
+ exit(0);
+
+ fd = accept(accept_fd, NULL, NULL);
+ if (fd == -1)
+ error(1, errno, "accept");
+ if (close(accept_fd))
+ error(1, errno, "close accept fd");
+ }
+
+ return fd;
+}
+
+/* Flush all outstanding bytes for the tcp receive queue */
+static void do_flush_tcp(int fd)
+{
+ int ret;
+
+ while (true) {
+ /* MSG_TRUNC flushes up to len bytes */
+ ret = recv(fd, NULL, 1 << 21, MSG_TRUNC | MSG_DONTWAIT);
+ if (ret == -1 && errno == EAGAIN)
+ return;
+ if (ret == -1)
+ error(1, errno, "flush");
+ if (ret == 0) {
+ /* client detached */
+ exit(0);
+ }
+
+ packets++;
+ bytes += ret;
+ }
+
+}
+
+static char sanitized_char(char val)
+{
+ return (val >= 'a' && val <= 'z') ? val : '.';
+}
+
+static void do_verify_udp(const char *data, int len)
+{
+ char cur = data[0];
+ int i;
+
+ /* verify contents */
+ if (cur < 'a' || cur > 'z')
+ error(1, 0, "data initial byte out of range");
+
+ for (i = 1; i < len; i++) {
+ if (cur == 'z')
+ cur = 'a';
+ else
+ cur++;
+
+ if (data[i] != cur)
+ error(1, 0, "data[%d]: len %d, %c(%hhu) != %c(%hhu)\n",
+ i, len,
+ sanitized_char(data[i]), data[i],
+ sanitized_char(cur), cur);
+ }
+}
+
+static int recv_msg(int fd, char *buf, int len, int *gso_size)
+{
+ char control[CMSG_SPACE(sizeof(uint16_t))] = {0};
+ struct msghdr msg = {0};
+ struct iovec iov = {0};
+ struct cmsghdr *cmsg;
+ uint16_t *gsosizeptr;
+ int ret;
+
+ iov.iov_base = buf;
+ iov.iov_len = len;
+
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+
+ msg.msg_control = control;
+ msg.msg_controllen = sizeof(control);
+
+ *gso_size = -1;
+ ret = recvmsg(fd, &msg, MSG_TRUNC | MSG_DONTWAIT);
+ if (ret != -1) {
+ for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL;
+ cmsg = CMSG_NXTHDR(&msg, cmsg)) {
+ if (cmsg->cmsg_level == SOL_UDP
+ && cmsg->cmsg_type == UDP_GRO) {
+ gsosizeptr = (uint16_t *) CMSG_DATA(cmsg);
+ *gso_size = *gsosizeptr;
+ break;
+ }
+ }
+ }
+ return ret;
+}
+
+/* Flush all outstanding datagrams. Verify first few bytes of each. */
+static void do_flush_udp(int fd)
+{
+ static char rbuf[ETH_MAX_MTU];
+ int ret, len, gso_size, budget = 256;
+
+ len = cfg_read_all ? sizeof(rbuf) : 0;
+ while (budget--) {
+ /* MSG_TRUNC will make return value full datagram length */
+ if (!cfg_expected_gso_size)
+ ret = recv(fd, rbuf, len, MSG_TRUNC | MSG_DONTWAIT);
+ else
+ ret = recv_msg(fd, rbuf, len, &gso_size);
+ if (ret == -1 && errno == EAGAIN)
+ break;
+ if (ret == -1)
+ error(1, errno, "recv");
+ if (cfg_expected_pkt_len && ret != cfg_expected_pkt_len)
+ error(1, 0, "recv: bad packet len, got %d,"
+ " expected %d\n", ret, cfg_expected_pkt_len);
+ if (len && cfg_verify) {
+ if (ret == 0)
+ error(1, errno, "recv: 0 byte datagram\n");
+
+ do_verify_udp(rbuf, ret);
+ }
+ if (cfg_expected_gso_size && cfg_expected_gso_size != gso_size)
+ error(1, 0, "recv: bad gso size, got %d, expected %d "
+ "(-1 == no gso cmsg))\n", gso_size,
+ cfg_expected_gso_size);
+
+ packets++;
+ bytes += ret;
+ if (cfg_expected_pkt_nr && packets >= cfg_expected_pkt_nr)
+ break;
+ }
+}
+
+static void usage(const char *filepath)
+{
+ error(1, 0, "Usage: %s [-C connect_timeout] [-Grtv] [-b addr] [-p port]"
+ " [-l pktlen] [-n packetnr] [-R rcv_timeout] [-S gsosize]",
+ filepath);
+}
+
+static void parse_opts(int argc, char **argv)
+{
+ const char *bind_addr = NULL;
+ int c;
+
+ while ((c = getopt(argc, argv, "4b:C:Gl:n:p:rR:S:tv")) != -1) {
+ switch (c) {
+ case '4':
+ cfg_family = PF_INET;
+ cfg_alen = sizeof(struct sockaddr_in);
+ break;
+ case 'b':
+ bind_addr = optarg;
+ break;
+ case 'C':
+ cfg_connect_timeout_ms = strtoul(optarg, NULL, 0);
+ break;
+ case 'G':
+ cfg_gro_segment = true;
+ break;
+ case 'l':
+ cfg_expected_pkt_len = strtoul(optarg, NULL, 0);
+ break;
+ case 'n':
+ cfg_expected_pkt_nr = strtoul(optarg, NULL, 0);
+ break;
+ case 'p':
+ cfg_port = strtoul(optarg, NULL, 0);
+ break;
+ case 'r':
+ cfg_read_all = true;
+ break;
+ case 'R':
+ cfg_rcv_timeout_ms = strtoul(optarg, NULL, 0);
+ break;
+ case 'S':
+ cfg_expected_gso_size = strtol(optarg, NULL, 0);
+ break;
+ case 't':
+ cfg_tcp = true;
+ break;
+ case 'v':
+ cfg_verify = true;
+ cfg_read_all = true;
+ break;
+ }
+ }
+
+ if (!bind_addr)
+ bind_addr = cfg_family == PF_INET6 ? "::" : "0.0.0.0";
+
+ setup_sockaddr(cfg_family, bind_addr, &cfg_bind_addr);
+
+ if (optind != argc)
+ usage(argv[0]);
+
+ if (cfg_tcp && cfg_verify)
+ error(1, 0, "TODO: implement verify mode for tcp");
+}
+
+static void do_recv(void)
+{
+ int timeout_ms = cfg_tcp ? cfg_rcv_timeout_ms : cfg_connect_timeout_ms;
+ unsigned long tnow, treport;
+ int fd;
+
+ fd = do_socket(cfg_tcp);
+
+ if (cfg_gro_segment && !cfg_tcp) {
+ int val = 1;
+ if (setsockopt(fd, IPPROTO_UDP, UDP_GRO, &val, sizeof(val)))
+ error(1, errno, "setsockopt UDP_GRO");
+ }
+
+ treport = gettimeofday_ms() + 1000;
+ do {
+ do_poll(fd, timeout_ms);
+
+ if (cfg_tcp)
+ do_flush_tcp(fd);
+ else
+ do_flush_udp(fd);
+
+ tnow = gettimeofday_ms();
+ if (tnow > treport) {
+ if (packets)
+ fprintf(stderr,
+ "%s rx: %6lu MB/s %8lu calls/s\n",
+ cfg_tcp ? "tcp" : "udp",
+ bytes >> 20, packets);
+ bytes = packets = 0;
+ treport = tnow + 1000;
+ }
+
+ timeout_ms = cfg_rcv_timeout_ms;
+
+ } while (!interrupted);
+
+ if (cfg_expected_pkt_nr && (packets != cfg_expected_pkt_nr))
+ error(1, 0, "wrong packet number! got %ld, expected %d\n",
+ packets, cfg_expected_pkt_nr);
+
+ if (close(fd))
+ error(1, errno, "close");
+}
+
+int main(int argc, char **argv)
+{
+ parse_opts(argc, argv);
+
+ signal(SIGINT, sigint_handler);
+
+ do_recv();
+
+ return 0;
+}
diff --git a/tools/testing/selftests/bpf/udpgso_bench_tx.c b/tools/testing/selftests/bpf/udpgso_bench_tx.c
new file mode 100644
index 0000000..f1fdaa2
--- /dev/null
+++ b/tools/testing/selftests/bpf/udpgso_bench_tx.c
@@ -0,0 +1,712 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#define _GNU_SOURCE
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <error.h>
+#include <linux/errqueue.h>
+#include <linux/net_tstamp.h>
+#include <netinet/if_ether.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <netinet/ip6.h>
+#include <netinet/udp.h>
+#include <poll.h>
+#include <sched.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/poll.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "../kselftest.h"
+
+#ifndef ETH_MAX_MTU
+#define ETH_MAX_MTU 0xFFFFU
+#endif
+
+#ifndef UDP_SEGMENT
+#define UDP_SEGMENT 103
+#endif
+
+#ifndef SO_ZEROCOPY
+#define SO_ZEROCOPY 60
+#endif
+
+#ifndef SO_EE_ORIGIN_ZEROCOPY
+#define SO_EE_ORIGIN_ZEROCOPY 5
+#endif
+
+#ifndef MSG_ZEROCOPY
+#define MSG_ZEROCOPY 0x4000000
+#endif
+
+#ifndef ENOTSUPP
+#define ENOTSUPP 524
+#endif
+
+#define NUM_PKT 100
+
+static bool cfg_cache_trash;
+static int cfg_cpu = -1;
+static int cfg_connected = true;
+static int cfg_family = PF_UNSPEC;
+static uint16_t cfg_mss;
+static int cfg_payload_len = (1472 * 42);
+static int cfg_port = 8000;
+static int cfg_runtime_ms = -1;
+static bool cfg_poll;
+static bool cfg_segment;
+static bool cfg_sendmmsg;
+static bool cfg_tcp;
+static uint32_t cfg_tx_ts = SOF_TIMESTAMPING_TX_SOFTWARE;
+static bool cfg_tx_tstamp;
+static bool cfg_audit;
+static bool cfg_verbose;
+static bool cfg_zerocopy;
+static int cfg_msg_nr;
+static uint16_t cfg_gso_size;
+static unsigned long total_num_msgs;
+static unsigned long total_num_sends;
+static unsigned long stat_tx_ts;
+static unsigned long stat_tx_ts_errors;
+static unsigned long tstart;
+static unsigned long tend;
+static unsigned long stat_zcopies;
+
+static socklen_t cfg_alen;
+static struct sockaddr_storage cfg_dst_addr;
+
+static bool interrupted;
+static char buf[NUM_PKT][ETH_MAX_MTU];
+
+static void sigint_handler(int signum)
+{
+ if (signum == SIGINT)
+ interrupted = true;
+}
+
+static unsigned long gettimeofday_ms(void)
+{
+ struct timeval tv;
+
+ gettimeofday(&tv, NULL);
+ return (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
+}
+
+static int set_cpu(int cpu)
+{
+ cpu_set_t mask;
+
+ CPU_ZERO(&mask);
+ CPU_SET(cpu, &mask);
+ if (sched_setaffinity(0, sizeof(mask), &mask))
+ error(1, 0, "setaffinity %d", cpu);
+
+ return 0;
+}
+
+static void setup_sockaddr(int domain, const char *str_addr, void *sockaddr)
+{
+ struct sockaddr_in6 *addr6 = (void *) sockaddr;
+ struct sockaddr_in *addr4 = (void *) sockaddr;
+
+ switch (domain) {
+ case PF_INET:
+ addr4->sin_family = AF_INET;
+ addr4->sin_port = htons(cfg_port);
+ if (inet_pton(AF_INET, str_addr, &(addr4->sin_addr)) != 1)
+ error(1, 0, "ipv4 parse error: %s", str_addr);
+ break;
+ case PF_INET6:
+ addr6->sin6_family = AF_INET6;
+ addr6->sin6_port = htons(cfg_port);
+ if (inet_pton(AF_INET6, str_addr, &(addr6->sin6_addr)) != 1)
+ error(1, 0, "ipv6 parse error: %s", str_addr);
+ break;
+ default:
+ error(1, 0, "illegal domain");
+ }
+}
+
+static void flush_cmsg(struct cmsghdr *cmsg)
+{
+ struct sock_extended_err *err;
+ struct scm_timestamping *tss;
+ __u32 lo;
+ __u32 hi;
+ int i;
+
+ switch (cmsg->cmsg_level) {
+ case SOL_SOCKET:
+ if (cmsg->cmsg_type == SO_TIMESTAMPING) {
+ i = (cfg_tx_ts == SOF_TIMESTAMPING_TX_HARDWARE) ? 2 : 0;
+ tss = (struct scm_timestamping *)CMSG_DATA(cmsg);
+ if (tss->ts[i].tv_sec == 0)
+ stat_tx_ts_errors++;
+ } else {
+ error(1, 0, "unknown SOL_SOCKET cmsg type=%u\n",
+ cmsg->cmsg_type);
+ }
+ break;
+ case SOL_IP:
+ case SOL_IPV6:
+ switch (cmsg->cmsg_type) {
+ case IP_RECVERR:
+ case IPV6_RECVERR:
+ {
+ err = (struct sock_extended_err *)CMSG_DATA(cmsg);
+ switch (err->ee_origin) {
+ case SO_EE_ORIGIN_TIMESTAMPING:
+ /* Got a TX timestamp from error queue */
+ stat_tx_ts++;
+ break;
+ case SO_EE_ORIGIN_ICMP:
+ case SO_EE_ORIGIN_ICMP6:
+ if (cfg_verbose)
+ fprintf(stderr,
+ "received ICMP error: type=%u, code=%u\n",
+ err->ee_type, err->ee_code);
+ break;
+ case SO_EE_ORIGIN_ZEROCOPY:
+ {
+ lo = err->ee_info;
+ hi = err->ee_data;
+ /* range of IDs acknowledged */
+ stat_zcopies += hi - lo + 1;
+ break;
+ }
+ case SO_EE_ORIGIN_LOCAL:
+ if (cfg_verbose)
+ fprintf(stderr,
+ "received packet with local origin: %u\n",
+ err->ee_origin);
+ break;
+ default:
+ error(0, 1, "received packet with origin: %u",
+ err->ee_origin);
+ }
+ break;
+ }
+ default:
+ error(0, 1, "unknown IP msg type=%u\n",
+ cmsg->cmsg_type);
+ break;
+ }
+ break;
+ default:
+ error(0, 1, "unknown cmsg level=%u\n",
+ cmsg->cmsg_level);
+ }
+}
+
+static void flush_errqueue_recv(int fd)
+{
+ char control[CMSG_SPACE(sizeof(struct scm_timestamping)) +
+ CMSG_SPACE(sizeof(struct sock_extended_err)) +
+ CMSG_SPACE(sizeof(struct sockaddr_in6))] = {0};
+ struct msghdr msg = {0};
+ struct cmsghdr *cmsg;
+ int ret;
+
+ while (1) {
+ msg.msg_control = control;
+ msg.msg_controllen = sizeof(control);
+ ret = recvmsg(fd, &msg, MSG_ERRQUEUE);
+ if (ret == -1 && errno == EAGAIN)
+ break;
+ if (ret == -1)
+ error(1, errno, "errqueue");
+ if (msg.msg_flags != MSG_ERRQUEUE)
+ error(1, 0, "errqueue: flags 0x%x\n", msg.msg_flags);
+ if (cfg_audit) {
+ for (cmsg = CMSG_FIRSTHDR(&msg);
+ cmsg;
+ cmsg = CMSG_NXTHDR(&msg, cmsg))
+ flush_cmsg(cmsg);
+ }
+ msg.msg_flags = 0;
+ }
+}
+
+static void flush_errqueue(int fd, const bool do_poll)
+{
+ if (do_poll) {
+ struct pollfd fds = {0};
+ int ret;
+
+ fds.fd = fd;
+ ret = poll(&fds, 1, 500);
+ if (ret == 0) {
+ if (cfg_verbose)
+ fprintf(stderr, "poll timeout\n");
+ } else if (ret < 0) {
+ error(1, errno, "poll");
+ }
+ }
+
+ flush_errqueue_recv(fd);
+}
+
+static int send_tcp(int fd, char *data)
+{
+ int ret, done = 0, count = 0;
+
+ while (done < cfg_payload_len) {
+ ret = send(fd, data + done, cfg_payload_len - done,
+ cfg_zerocopy ? MSG_ZEROCOPY : 0);
+ if (ret == -1)
+ error(1, errno, "write");
+
+ done += ret;
+ count++;
+ }
+
+ return count;
+}
+
+static int send_udp(int fd, char *data)
+{
+ int ret, total_len, len, count = 0;
+
+ total_len = cfg_payload_len;
+
+ while (total_len) {
+ len = total_len < cfg_mss ? total_len : cfg_mss;
+
+ ret = sendto(fd, data, len, cfg_zerocopy ? MSG_ZEROCOPY : 0,
+ cfg_connected ? NULL : (void *)&cfg_dst_addr,
+ cfg_connected ? 0 : cfg_alen);
+ if (ret == -1)
+ error(1, errno, "write");
+ if (ret != len)
+ error(1, errno, "write: %uB != %uB\n", ret, len);
+
+ total_len -= len;
+ count++;
+ }
+
+ return count;
+}
+
+static void send_ts_cmsg(struct cmsghdr *cm)
+{
+ uint32_t *valp;
+
+ cm->cmsg_level = SOL_SOCKET;
+ cm->cmsg_type = SO_TIMESTAMPING;
+ cm->cmsg_len = CMSG_LEN(sizeof(cfg_tx_ts));
+ valp = (void *)CMSG_DATA(cm);
+ *valp = cfg_tx_ts;
+}
+
+static int send_udp_sendmmsg(int fd, char *data)
+{
+ char control[CMSG_SPACE(sizeof(cfg_tx_ts))] = {0};
+ const int max_nr_msg = ETH_MAX_MTU / ETH_DATA_LEN;
+ struct mmsghdr mmsgs[max_nr_msg];
+ struct iovec iov[max_nr_msg];
+ unsigned int off = 0, left;
+ size_t msg_controllen = 0;
+ int i = 0, ret;
+
+ memset(mmsgs, 0, sizeof(mmsgs));
+
+ if (cfg_tx_tstamp) {
+ struct msghdr msg = {0};
+ struct cmsghdr *cmsg;
+
+ msg.msg_control = control;
+ msg.msg_controllen = sizeof(control);
+ cmsg = CMSG_FIRSTHDR(&msg);
+ send_ts_cmsg(cmsg);
+ msg_controllen += CMSG_SPACE(sizeof(cfg_tx_ts));
+ }
+
+ left = cfg_payload_len;
+ while (left) {
+ if (i == max_nr_msg)
+ error(1, 0, "sendmmsg: exceeds max_nr_msg");
+
+ iov[i].iov_base = data + off;
+ iov[i].iov_len = cfg_mss < left ? cfg_mss : left;
+
+ mmsgs[i].msg_hdr.msg_iov = iov + i;
+ mmsgs[i].msg_hdr.msg_iovlen = 1;
+
+ mmsgs[i].msg_hdr.msg_name = (void *)&cfg_dst_addr;
+ mmsgs[i].msg_hdr.msg_namelen = cfg_alen;
+ if (msg_controllen) {
+ mmsgs[i].msg_hdr.msg_control = control;
+ mmsgs[i].msg_hdr.msg_controllen = msg_controllen;
+ }
+
+ off += iov[i].iov_len;
+ left -= iov[i].iov_len;
+ i++;
+ }
+
+ ret = sendmmsg(fd, mmsgs, i, cfg_zerocopy ? MSG_ZEROCOPY : 0);
+ if (ret == -1)
+ error(1, errno, "sendmmsg");
+
+ return ret;
+}
+
+static void send_udp_segment_cmsg(struct cmsghdr *cm)
+{
+ uint16_t *valp;
+
+ cm->cmsg_level = SOL_UDP;
+ cm->cmsg_type = UDP_SEGMENT;
+ cm->cmsg_len = CMSG_LEN(sizeof(cfg_gso_size));
+ valp = (void *)CMSG_DATA(cm);
+ *valp = cfg_gso_size;
+}
+
+static int send_udp_segment(int fd, char *data)
+{
+ char control[CMSG_SPACE(sizeof(cfg_gso_size)) +
+ CMSG_SPACE(sizeof(cfg_tx_ts))] = {0};
+ struct msghdr msg = {0};
+ struct iovec iov = {0};
+ size_t msg_controllen;
+ struct cmsghdr *cmsg;
+ int ret;
+
+ iov.iov_base = data;
+ iov.iov_len = cfg_payload_len;
+
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+
+ msg.msg_control = control;
+ msg.msg_controllen = sizeof(control);
+ cmsg = CMSG_FIRSTHDR(&msg);
+ send_udp_segment_cmsg(cmsg);
+ msg_controllen = CMSG_SPACE(sizeof(cfg_mss));
+ if (cfg_tx_tstamp) {
+ cmsg = CMSG_NXTHDR(&msg, cmsg);
+ send_ts_cmsg(cmsg);
+ msg_controllen += CMSG_SPACE(sizeof(cfg_tx_ts));
+ }
+
+ msg.msg_controllen = msg_controllen;
+ msg.msg_name = (void *)&cfg_dst_addr;
+ msg.msg_namelen = cfg_alen;
+
+ ret = sendmsg(fd, &msg, cfg_zerocopy ? MSG_ZEROCOPY : 0);
+ if (ret == -1)
+ error(1, errno, "sendmsg");
+ if (ret != iov.iov_len)
+ error(1, 0, "sendmsg: %u != %llu\n", ret,
+ (unsigned long long)iov.iov_len);
+
+ return 1;
+}
+
+static void usage(const char *filepath)
+{
+ error(1, 0, "Usage: %s [-46acmHPtTuvz] [-C cpu] [-D dst ip] [-l secs] [-M messagenr] [-p port] [-s sendsize] [-S gsosize]",
+ filepath);
+}
+
+static void parse_opts(int argc, char **argv)
+{
+ const char *bind_addr = NULL;
+ int max_len, hdrlen;
+ int c;
+
+ while ((c = getopt(argc, argv, "46acC:D:Hl:mM:p:s:PS:tTuvz")) != -1) {
+ switch (c) {
+ case '4':
+ if (cfg_family != PF_UNSPEC)
+ error(1, 0, "Pass one of -4 or -6");
+ cfg_family = PF_INET;
+ cfg_alen = sizeof(struct sockaddr_in);
+ break;
+ case '6':
+ if (cfg_family != PF_UNSPEC)
+ error(1, 0, "Pass one of -4 or -6");
+ cfg_family = PF_INET6;
+ cfg_alen = sizeof(struct sockaddr_in6);
+ break;
+ case 'a':
+ cfg_audit = true;
+ break;
+ case 'c':
+ cfg_cache_trash = true;
+ break;
+ case 'C':
+ cfg_cpu = strtol(optarg, NULL, 0);
+ break;
+ case 'D':
+ bind_addr = optarg;
+ break;
+ case 'l':
+ cfg_runtime_ms = strtoul(optarg, NULL, 10) * 1000;
+ break;
+ case 'm':
+ cfg_sendmmsg = true;
+ break;
+ case 'M':
+ cfg_msg_nr = strtoul(optarg, NULL, 10);
+ break;
+ case 'p':
+ cfg_port = strtoul(optarg, NULL, 0);
+ break;
+ case 'P':
+ cfg_poll = true;
+ break;
+ case 's':
+ cfg_payload_len = strtoul(optarg, NULL, 0);
+ break;
+ case 'S':
+ cfg_gso_size = strtoul(optarg, NULL, 0);
+ cfg_segment = true;
+ break;
+ case 'H':
+ cfg_tx_ts = SOF_TIMESTAMPING_TX_HARDWARE;
+ cfg_tx_tstamp = true;
+ break;
+ case 't':
+ cfg_tcp = true;
+ break;
+ case 'T':
+ cfg_tx_tstamp = true;
+ break;
+ case 'u':
+ cfg_connected = false;
+ break;
+ case 'v':
+ cfg_verbose = true;
+ break;
+ case 'z':
+ cfg_zerocopy = true;
+ break;
+ }
+ }
+
+ if (!bind_addr)
+ bind_addr = cfg_family == PF_INET6 ? "::" : "0.0.0.0";
+
+ setup_sockaddr(cfg_family, bind_addr, &cfg_dst_addr);
+
+ if (optind != argc)
+ usage(argv[0]);
+
+ if (cfg_family == PF_UNSPEC)
+ error(1, 0, "must pass one of -4 or -6");
+ if (cfg_tcp && !cfg_connected)
+ error(1, 0, "connectionless tcp makes no sense");
+ if (cfg_segment && cfg_sendmmsg)
+ error(1, 0, "cannot combine segment offload and sendmmsg");
+ if (cfg_tx_tstamp && !(cfg_segment || cfg_sendmmsg))
+ error(1, 0, "Options -T and -H require either -S or -m option");
+
+ if (cfg_family == PF_INET)
+ hdrlen = sizeof(struct iphdr) + sizeof(struct udphdr);
+ else
+ hdrlen = sizeof(struct ip6_hdr) + sizeof(struct udphdr);
+
+ cfg_mss = ETH_DATA_LEN - hdrlen;
+ max_len = ETH_MAX_MTU - hdrlen;
+ if (!cfg_gso_size)
+ cfg_gso_size = cfg_mss;
+
+ if (cfg_payload_len > max_len)
+ error(1, 0, "payload length %u exceeds max %u",
+ cfg_payload_len, max_len);
+}
+
+static void set_pmtu_discover(int fd, bool is_ipv4)
+{
+ int level, name, val;
+
+ if (is_ipv4) {
+ level = SOL_IP;
+ name = IP_MTU_DISCOVER;
+ val = IP_PMTUDISC_DO;
+ } else {
+ level = SOL_IPV6;
+ name = IPV6_MTU_DISCOVER;
+ val = IPV6_PMTUDISC_DO;
+ }
+
+ if (setsockopt(fd, level, name, &val, sizeof(val)))
+ error(1, errno, "setsockopt path mtu");
+}
+
+static void set_tx_timestamping(int fd)
+{
+ int val = SOF_TIMESTAMPING_OPT_CMSG | SOF_TIMESTAMPING_OPT_ID |
+ SOF_TIMESTAMPING_OPT_TSONLY;
+
+ if (cfg_tx_ts == SOF_TIMESTAMPING_TX_SOFTWARE)
+ val |= SOF_TIMESTAMPING_SOFTWARE;
+ else
+ val |= SOF_TIMESTAMPING_RAW_HARDWARE;
+
+ if (setsockopt(fd, SOL_SOCKET, SO_TIMESTAMPING, &val, sizeof(val)))
+ error(1, errno, "setsockopt tx timestamping");
+}
+
+static void print_audit_report(unsigned long num_msgs, unsigned long num_sends)
+{
+ unsigned long tdelta;
+
+ tdelta = tend - tstart;
+ if (!tdelta)
+ return;
+
+ fprintf(stderr, "Summary over %lu.%03lu seconds...\n",
+ tdelta / 1000, tdelta % 1000);
+ fprintf(stderr,
+ "sum %s tx: %6lu MB/s %10lu calls (%lu/s) %10lu msgs (%lu/s)\n",
+ cfg_tcp ? "tcp" : "udp",
+ ((num_msgs * cfg_payload_len) >> 10) / tdelta,
+ num_sends, num_sends * 1000 / tdelta,
+ num_msgs, num_msgs * 1000 / tdelta);
+
+ if (cfg_tx_tstamp) {
+ if (stat_tx_ts_errors)
+ error(1, 0,
+ "Expected clean TX Timestamps: %9lu msgs received %6lu errors",
+ stat_tx_ts, stat_tx_ts_errors);
+ if (stat_tx_ts != num_sends)
+ error(1, 0,
+ "Unexpected number of TX Timestamps: %9lu expected %9lu received",
+ num_sends, stat_tx_ts);
+ fprintf(stderr,
+ "Tx Timestamps: %19lu received %17lu errors\n",
+ stat_tx_ts, stat_tx_ts_errors);
+ }
+
+ if (cfg_zerocopy) {
+ if (stat_zcopies != num_sends)
+ error(1, 0, "Unexpected number of Zerocopy completions: %9lu expected %9lu received",
+ num_sends, stat_zcopies);
+ fprintf(stderr,
+ "Zerocopy acks: %19lu\n",
+ stat_zcopies);
+ }
+}
+
+static void print_report(unsigned long num_msgs, unsigned long num_sends)
+{
+ fprintf(stderr,
+ "%s tx: %6lu MB/s %8lu calls/s %6lu msg/s\n",
+ cfg_tcp ? "tcp" : "udp",
+ (num_msgs * cfg_payload_len) >> 20,
+ num_sends, num_msgs);
+
+ if (cfg_audit) {
+ total_num_msgs += num_msgs;
+ total_num_sends += num_sends;
+ }
+}
+
+int main(int argc, char **argv)
+{
+ unsigned long num_msgs, num_sends;
+ unsigned long tnow, treport, tstop;
+ int fd, i, val, ret;
+
+ parse_opts(argc, argv);
+
+ if (cfg_cpu > 0)
+ set_cpu(cfg_cpu);
+
+ for (i = 0; i < sizeof(buf[0]); i++)
+ buf[0][i] = 'a' + (i % 26);
+ for (i = 1; i < NUM_PKT; i++)
+ memcpy(buf[i], buf[0], sizeof(buf[0]));
+
+ signal(SIGINT, sigint_handler);
+
+ fd = socket(cfg_family, cfg_tcp ? SOCK_STREAM : SOCK_DGRAM, 0);
+ if (fd == -1)
+ error(1, errno, "socket");
+
+ if (cfg_zerocopy) {
+ val = 1;
+
+ ret = setsockopt(fd, SOL_SOCKET, SO_ZEROCOPY,
+ &val, sizeof(val));
+ if (ret) {
+ if (errno == ENOPROTOOPT || errno == ENOTSUPP) {
+ fprintf(stderr, "SO_ZEROCOPY not supported");
+ exit(KSFT_SKIP);
+ }
+ error(1, errno, "setsockopt zerocopy");
+ }
+ }
+
+ if (cfg_connected &&
+ connect(fd, (void *)&cfg_dst_addr, cfg_alen))
+ error(1, errno, "connect");
+
+ if (cfg_segment)
+ set_pmtu_discover(fd, cfg_family == PF_INET);
+
+ if (cfg_tx_tstamp)
+ set_tx_timestamping(fd);
+
+ num_msgs = num_sends = 0;
+ tnow = gettimeofday_ms();
+ tstart = tnow;
+ tend = tnow;
+ tstop = tnow + cfg_runtime_ms;
+ treport = tnow + 1000;
+
+ i = 0;
+ do {
+ if (cfg_tcp)
+ num_sends += send_tcp(fd, buf[i]);
+ else if (cfg_segment)
+ num_sends += send_udp_segment(fd, buf[i]);
+ else if (cfg_sendmmsg)
+ num_sends += send_udp_sendmmsg(fd, buf[i]);
+ else
+ num_sends += send_udp(fd, buf[i]);
+ num_msgs++;
+ if ((cfg_zerocopy && ((num_msgs & 0xF) == 0)) || cfg_tx_tstamp)
+ flush_errqueue(fd, cfg_poll);
+
+ if (cfg_msg_nr && num_msgs >= cfg_msg_nr)
+ break;
+
+ tnow = gettimeofday_ms();
+ if (tnow >= treport) {
+ print_report(num_msgs, num_sends);
+ num_msgs = num_sends = 0;
+ treport = tnow + 1000;
+ }
+
+ /* cold cache when writing buffer */
+ if (cfg_cache_trash)
+ i = ++i < NUM_PKT ? i : 0;
+
+ } while (!interrupted && (cfg_runtime_ms == -1 || tnow < tstop));
+
+ if (cfg_zerocopy || cfg_tx_tstamp)
+ flush_errqueue(fd, true);
+
+ if (close(fd))
+ error(1, errno, "close");
+
+ if (cfg_audit) {
+ tend = tnow;
+ total_num_msgs += num_msgs;
+ total_num_sends += num_sends;
+ print_audit_report(total_num_msgs, total_num_sends);
+ }
+
+ return 0;
+}
diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
index 69c5836..a2ac42a 100644
--- a/tools/testing/selftests/net/Makefile
+++ b/tools/testing/selftests/net/Makefile
@@ -76,8 +76,6 @@ TEST_FILES := settings
include ../lib.mk
-include bpf/Makefile
-
$(OUTPUT)/reuseport_bpf_numa: LDLIBS += -lnuma
$(OUTPUT)/tcp_mmap: LDLIBS += -lpthread
$(OUTPUT)/tcp_inq: LDLIBS += -lpthread
diff --git a/tools/testing/selftests/net/bpf/Makefile b/tools/testing/selftests/net/bpf/Makefile
deleted file mode 100644
index 8ccaf87..0000000
--- a/tools/testing/selftests/net/bpf/Makefile
+++ /dev/null
@@ -1,14 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-CLANG ?= clang
-CCINCLUDE += -I../../bpf
-CCINCLUDE += -I../../../../lib
-CCINCLUDE += -I../../../../../usr/include/
-
-TEST_CUSTOM_PROGS = $(OUTPUT)/bpf/nat6to4.o
-all: $(TEST_CUSTOM_PROGS)
-
-$(OUTPUT)/%.o: %.c
- $(CLANG) -O2 -target bpf -c $< $(CCINCLUDE) -o $@
-
-EXTRA_CLEAN := $(TEST_CUSTOM_PROGS)
diff --git a/tools/testing/selftests/net/bpf/nat6to4.c b/tools/testing/selftests/net/bpf/nat6to4.c
deleted file mode 100644
index ac54c36..0000000
--- a/tools/testing/selftests/net/bpf/nat6to4.c
+++ /dev/null
@@ -1,285 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * This code is taken from the Android Open Source Project and the author
- * (Maciej Żenczykowski) has gave permission to relicense it under the
- * GPLv2. Therefore this program is free software;
- * You can redistribute it and/or modify it under the terms of the GNU
- * General Public License version 2 as published by the Free Software
- * Foundation
-
- * The original headers, including the original license headers, are
- * included below for completeness.
- *
- * Copyright (C) 2019 The Android Open Source Project
- *
- * 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 <linux/bpf.h>
-#include <linux/if.h>
-#include <linux/if_ether.h>
-#include <linux/if_packet.h>
-#include <linux/in.h>
-#include <linux/in6.h>
-#include <linux/ip.h>
-#include <linux/ipv6.h>
-#include <linux/pkt_cls.h>
-#include <linux/swab.h>
-#include <stdbool.h>
-#include <stdint.h>
-
-
-#include <linux/udp.h>
-
-#include <bpf/bpf_helpers.h>
-#include <bpf/bpf_endian.h>
-
-#define IP_DF 0x4000 // Flag: "Don't Fragment"
-
-SEC("schedcls/ingress6/nat_6")
-int sched_cls_ingress6_nat_6_prog(struct __sk_buff *skb)
-{
- const int l2_header_size = sizeof(struct ethhdr);
- void *data = (void *)(long)skb->data;
- const void *data_end = (void *)(long)skb->data_end;
- const struct ethhdr * const eth = data; // used iff is_ethernet
- const struct ipv6hdr * const ip6 = (void *)(eth + 1);
-
- // Require ethernet dst mac address to be our unicast address.
- if (skb->pkt_type != PACKET_HOST)
- return TC_ACT_OK;
-
- // Must be meta-ethernet IPv6 frame
- if (skb->protocol != bpf_htons(ETH_P_IPV6))
- return TC_ACT_OK;
-
- // Must have (ethernet and) ipv6 header
- if (data + l2_header_size + sizeof(*ip6) > data_end)
- return TC_ACT_OK;
-
- // Ethertype - if present - must be IPv6
- if (eth->h_proto != bpf_htons(ETH_P_IPV6))
- return TC_ACT_OK;
-
- // IP version must be 6
- if (ip6->version != 6)
- return TC_ACT_OK;
- // Maximum IPv6 payload length that can be translated to IPv4
- if (bpf_ntohs(ip6->payload_len) > 0xFFFF - sizeof(struct iphdr))
- return TC_ACT_OK;
- switch (ip6->nexthdr) {
- case IPPROTO_TCP: // For TCP & UDP the checksum neutrality of the chosen IPv6
- case IPPROTO_UDP: // address means there is no need to update their checksums.
- case IPPROTO_GRE: // We do not need to bother looking at GRE/ESP headers,
- case IPPROTO_ESP: // since there is never a checksum to update.
- break;
- default: // do not know how to handle anything else
- return TC_ACT_OK;
- }
-
- struct ethhdr eth2; // used iff is_ethernet
-
- eth2 = *eth; // Copy over the ethernet header (src/dst mac)
- eth2.h_proto = bpf_htons(ETH_P_IP); // But replace the ethertype
-
- struct iphdr ip = {
- .version = 4, // u4
- .ihl = sizeof(struct iphdr) / sizeof(__u32), // u4
- .tos = (ip6->priority << 4) + (ip6->flow_lbl[0] >> 4), // u8
- .tot_len = bpf_htons(bpf_ntohs(ip6->payload_len) + sizeof(struct iphdr)), // u16
- .id = 0, // u16
- .frag_off = bpf_htons(IP_DF), // u16
- .ttl = ip6->hop_limit, // u8
- .protocol = ip6->nexthdr, // u8
- .check = 0, // u16
- .saddr = 0x0201a8c0, // u32
- .daddr = 0x0101a8c0, // u32
- };
-
- // Calculate the IPv4 one's complement checksum of the IPv4 header.
- __wsum sum4 = 0;
-
- for (int i = 0; i < sizeof(ip) / sizeof(__u16); ++i)
- sum4 += ((__u16 *)&ip)[i];
-
- // Note that sum4 is guaranteed to be non-zero by virtue of ip.version == 4
- sum4 = (sum4 & 0xFFFF) + (sum4 >> 16); // collapse u32 into range 1 .. 0x1FFFE
- sum4 = (sum4 & 0xFFFF) + (sum4 >> 16); // collapse any potential carry into u16
- ip.check = (__u16)~sum4; // sum4 cannot be zero, so this is never 0xFFFF
-
- // Calculate the *negative* IPv6 16-bit one's complement checksum of the IPv6 header.
- __wsum sum6 = 0;
- // We'll end up with a non-zero sum due to ip6->version == 6 (which has '0' bits)
- for (int i = 0; i < sizeof(*ip6) / sizeof(__u16); ++i)
- sum6 += ~((__u16 *)ip6)[i]; // note the bitwise negation
-
- // Note that there is no L4 checksum update: we are relying on the checksum neutrality
- // of the ipv6 address chosen by netd's ClatdController.
-
- // Packet mutations begin - point of no return, but if this first modification fails
- // the packet is probably still pristine, so let clatd handle it.
- if (bpf_skb_change_proto(skb, bpf_htons(ETH_P_IP), 0))
- return TC_ACT_OK;
- bpf_csum_update(skb, sum6);
-
- data = (void *)(long)skb->data;
- data_end = (void *)(long)skb->data_end;
- if (data + l2_header_size + sizeof(struct iphdr) > data_end)
- return TC_ACT_SHOT;
-
- struct ethhdr *new_eth = data;
-
- // Copy over the updated ethernet header
- *new_eth = eth2;
-
- // Copy over the new ipv4 header.
- *(struct iphdr *)(new_eth + 1) = ip;
- return bpf_redirect(skb->ifindex, BPF_F_INGRESS);
-}
-
-SEC("schedcls/egress4/snat4")
-int sched_cls_egress4_snat4_prog(struct __sk_buff *skb)
-{
- const int l2_header_size = sizeof(struct ethhdr);
- void *data = (void *)(long)skb->data;
- const void *data_end = (void *)(long)skb->data_end;
- const struct ethhdr *const eth = data; // used iff is_ethernet
- const struct iphdr *const ip4 = (void *)(eth + 1);
-
- // Must be meta-ethernet IPv4 frame
- if (skb->protocol != bpf_htons(ETH_P_IP))
- return TC_ACT_OK;
-
- // Must have ipv4 header
- if (data + l2_header_size + sizeof(struct ipv6hdr) > data_end)
- return TC_ACT_OK;
-
- // Ethertype - if present - must be IPv4
- if (eth->h_proto != bpf_htons(ETH_P_IP))
- return TC_ACT_OK;
-
- // IP version must be 4
- if (ip4->version != 4)
- return TC_ACT_OK;
-
- // We cannot handle IP options, just standard 20 byte == 5 dword minimal IPv4 header
- if (ip4->ihl != 5)
- return TC_ACT_OK;
-
- // Maximum IPv6 payload length that can be translated to IPv4
- if (bpf_htons(ip4->tot_len) > 0xFFFF - sizeof(struct ipv6hdr))
- return TC_ACT_OK;
-
- // Calculate the IPv4 one's complement checksum of the IPv4 header.
- __wsum sum4 = 0;
-
- for (int i = 0; i < sizeof(*ip4) / sizeof(__u16); ++i)
- sum4 += ((__u16 *)ip4)[i];
-
- // Note that sum4 is guaranteed to be non-zero by virtue of ip4->version == 4
- sum4 = (sum4 & 0xFFFF) + (sum4 >> 16); // collapse u32 into range 1 .. 0x1FFFE
- sum4 = (sum4 & 0xFFFF) + (sum4 >> 16); // collapse any potential carry into u16
- // for a correct checksum we should get *a* zero, but sum4 must be positive, ie 0xFFFF
- if (sum4 != 0xFFFF)
- return TC_ACT_OK;
-
- // Minimum IPv4 total length is the size of the header
- if (bpf_ntohs(ip4->tot_len) < sizeof(*ip4))
- return TC_ACT_OK;
-
- // We are incapable of dealing with IPv4 fragments
- if (ip4->frag_off & ~bpf_htons(IP_DF))
- return TC_ACT_OK;
-
- switch (ip4->protocol) {
- case IPPROTO_TCP: // For TCP & UDP the checksum neutrality of the chosen IPv6
- case IPPROTO_GRE: // address means there is no need to update their checksums.
- case IPPROTO_ESP: // We do not need to bother looking at GRE/ESP headers,
- break; // since there is never a checksum to update.
-
- case IPPROTO_UDP: // See above comment, but must also have UDP header...
- if (data + sizeof(*ip4) + sizeof(struct udphdr) > data_end)
- return TC_ACT_OK;
- const struct udphdr *uh = (const struct udphdr *)(ip4 + 1);
- // If IPv4/UDP checksum is 0 then fallback to clatd so it can calculate the
- // checksum. Otherwise the network or more likely the NAT64 gateway might
- // drop the packet because in most cases IPv6/UDP packets with a zero checksum
- // are invalid. See RFC 6935. TODO: calculate checksum via bpf_csum_diff()
- if (!uh->check)
- return TC_ACT_OK;
- break;
-
- default: // do not know how to handle anything else
- return TC_ACT_OK;
- }
- struct ethhdr eth2; // used iff is_ethernet
-
- eth2 = *eth; // Copy over the ethernet header (src/dst mac)
- eth2.h_proto = bpf_htons(ETH_P_IPV6); // But replace the ethertype
-
- struct ipv6hdr ip6 = {
- .version = 6, // __u8:4
- .priority = ip4->tos >> 4, // __u8:4
- .flow_lbl = {(ip4->tos & 0xF) << 4, 0, 0}, // __u8[3]
- .payload_len = bpf_htons(bpf_ntohs(ip4->tot_len) - 20), // __be16
- .nexthdr = ip4->protocol, // __u8
- .hop_limit = ip4->ttl, // __u8
- };
- ip6.saddr.in6_u.u6_addr32[0] = bpf_htonl(0x20010db8);
- ip6.saddr.in6_u.u6_addr32[1] = 0;
- ip6.saddr.in6_u.u6_addr32[2] = 0;
- ip6.saddr.in6_u.u6_addr32[3] = bpf_htonl(1);
- ip6.daddr.in6_u.u6_addr32[0] = bpf_htonl(0x20010db8);
- ip6.daddr.in6_u.u6_addr32[1] = 0;
- ip6.daddr.in6_u.u6_addr32[2] = 0;
- ip6.daddr.in6_u.u6_addr32[3] = bpf_htonl(2);
-
- // Calculate the IPv6 16-bit one's complement checksum of the IPv6 header.
- __wsum sum6 = 0;
- // We'll end up with a non-zero sum due to ip6.version == 6
- for (int i = 0; i < sizeof(ip6) / sizeof(__u16); ++i)
- sum6 += ((__u16 *)&ip6)[i];
-
- // Packet mutations begin - point of no return, but if this first modification fails
- // the packet is probably still pristine, so let clatd handle it.
- if (bpf_skb_change_proto(skb, bpf_htons(ETH_P_IPV6), 0))
- return TC_ACT_OK;
-
- // This takes care of updating the skb->csum field for a CHECKSUM_COMPLETE packet.
- // In such a case, skb->csum is a 16-bit one's complement sum of the entire payload,
- // thus we need to subtract out the ipv4 header's sum, and add in the ipv6 header's sum.
- // However, we've already verified the ipv4 checksum is correct and thus 0.
- // Thus we only need to add the ipv6 header's sum.
- //
- // bpf_csum_update() always succeeds if the skb is CHECKSUM_COMPLETE and returns an error
- // (-ENOTSUPP) if it isn't. So we just ignore the return code (see above for more details).
- bpf_csum_update(skb, sum6);
-
- // bpf_skb_change_proto() invalidates all pointers - reload them.
- data = (void *)(long)skb->data;
- data_end = (void *)(long)skb->data_end;
-
- // I cannot think of any valid way for this error condition to trigger, however I do
- // believe the explicit check is required to keep the in kernel ebpf verifier happy.
- if (data + l2_header_size + sizeof(ip6) > data_end)
- return TC_ACT_SHOT;
-
- struct ethhdr *new_eth = data;
-
- // Copy over the updated ethernet header
- *new_eth = eth2;
- // Copy over the new ipv4 header.
- *(struct ipv6hdr *)(new_eth + 1) = ip6;
- return TC_ACT_OK;
-}
-
-char _license[] SEC("license") = ("GPL");
diff --git a/tools/testing/selftests/net/udpgro_frglist.sh b/tools/testing/selftests/net/udpgro_frglist.sh
deleted file mode 100755
index 7f94175..0000000
--- a/tools/testing/selftests/net/udpgro_frglist.sh
+++ /dev/null
@@ -1,103 +0,0 @@
-#!/bin/bash
-# SPDX-License-Identifier: GPL-2.0
-#
-# Run a series of udpgro benchmarks
-
-readonly PEER_NS="ns-peer-$(mktemp -u XXXXXX)"
-
-BPF_FILE="../bpf/xdp_dummy.bpf.o"
-
-cleanup() {
- local -r jobs="$(jobs -p)"
- local -r ns="$(ip netns list|grep $PEER_NS)"
-
- [ -n "${jobs}" ] && kill -INT ${jobs} 2>/dev/null
- [ -n "$ns" ] && ip netns del $ns 2>/dev/null
-}
-trap cleanup EXIT
-
-run_one() {
- # use 'rx' as separator between sender args and receiver args
- local -r all="$@"
- local -r tx_args=${all%rx*}
- local rx_args=${all#*rx}
-
-
-
- ip netns add "${PEER_NS}"
- ip -netns "${PEER_NS}" link set lo up
- ip link add type veth
- ip link set dev veth0 up
- ip addr add dev veth0 192.168.1.2/24
- ip addr add dev veth0 2001:db8::2/64 nodad
-
- ip link set dev veth1 netns "${PEER_NS}"
- ip -netns "${PEER_NS}" addr add dev veth1 192.168.1.1/24
- ip -netns "${PEER_NS}" addr add dev veth1 2001:db8::1/64 nodad
- ip -netns "${PEER_NS}" link set dev veth1 up
- ip netns exec "${PEER_NS}" ethtool -K veth1 rx-gro-list on
-
-
- ip -n "${PEER_NS}" link set veth1 xdp object ${BPF_FILE} section xdp
- tc -n "${PEER_NS}" qdisc add dev veth1 clsact
- tc -n "${PEER_NS}" filter add dev veth1 ingress prio 4 protocol ipv6 bpf object-file ../bpf/nat6to4.o section schedcls/ingress6/nat_6 direct-action
- tc -n "${PEER_NS}" filter add dev veth1 egress prio 4 protocol ip bpf object-file ../bpf/nat6to4.o section schedcls/egress4/snat4 direct-action
- echo ${rx_args}
- ip netns exec "${PEER_NS}" ./udpgso_bench_rx ${rx_args} -r &
-
- # Hack: let bg programs complete the startup
- sleep 0.2
- ./udpgso_bench_tx ${tx_args}
-}
-
-run_in_netns() {
- local -r args=$@
- echo ${args}
- ./in_netns.sh $0 __subprocess ${args}
-}
-
-run_udp() {
- local -r args=$@
-
- echo "udp gso - over veth touching data"
- run_in_netns ${args} -u -S 0 rx -4 -v
-
- echo "udp gso and gro - over veth touching data"
- run_in_netns ${args} -S 0 rx -4 -G
-}
-
-run_tcp() {
- local -r args=$@
-
- echo "tcp - over veth touching data"
- run_in_netns ${args} -t rx -4 -t
-}
-
-run_all() {
- local -r core_args="-l 4"
- local -r ipv4_args="${core_args} -4 -D 192.168.1.1"
- local -r ipv6_args="${core_args} -6 -D 2001:db8::1"
-
- echo "ipv6"
- run_tcp "${ipv6_args}"
- run_udp "${ipv6_args}"
-}
-
-if [ ! -f ${BPF_FILE} ]; then
- echo "Missing xdp_dummy helper. Build bpf selftest first"
- exit -1
-fi
-
-if [ ! -f bpf/nat6to4.o ]; then
- echo "Missing nat6to4 helper. Build bpfnat6to4.o selftest first"
- exit -1
-fi
-
-if [[ $# -eq 0 ]]; then
- run_all
-elif [[ $1 == "__subprocess" ]]; then
- shift
- run_one $@
-else
- run_in_netns $@
-fi
--
1.8.3.1
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