Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 446 insertions, 0 deletions

diff --git a/tools/testing/selftests/net/l2_tos_ttl_inherit.sh b/tools/testing/selftests/net/l2_tos_ttl_inherit.sh
new file mode 100755
index 000000000..f11756e7d
--- /dev/null
+++ b/tools/testing/selftests/net/l2_tos_ttl_inherit.sh
@@ -0,0 +1,446 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+# Author: Matthias May <matthias.may@westermo.com>
+#
+# This script evaluates ip tunnels that are capable of carrying L2 traffic
+# if they inherit or set the inheritable fields.
+# Namely these tunnels are: 'gretap', 'vxlan' and 'geneve'.
+# Checked inheritable fields are: TOS and TTL.
+# The outer tunnel protocol of 'IPv4' or 'IPv6' is verified-
+# As payload frames of type 'IPv4', 'IPv6' and 'other'(ARP) are verified.
+# In addition this script also checks if forcing a specific field in the
+# outer header is working.
+
+# Return 4 by default (Kselftest SKIP code)
+ERR=4
+
+if [ "$(id -u)" != "0" ]; then
+	echo "Please run as root."
+	exit $ERR
+fi
+if ! which tcpdump > /dev/null 2>&1; then
+	echo "No tcpdump found. Required for this test."
+	exit $ERR
+fi
+
+expected_tos="0x00"
+expected_ttl="0"
+failed=false
+
+readonly NS0=$(mktemp -u ns0-XXXXXXXX)
+readonly NS1=$(mktemp -u ns1-XXXXXXXX)
+
+RUN_NS0="ip netns exec ${NS0}"
+
+get_random_tos() {
+	# Get a random hex tos value between 0x00 and 0xfc, a multiple of 4
+	echo "0x$(tr -dc '0-9a-f' < /dev/urandom | head -c 1)\
+$(tr -dc '048c' < /dev/urandom | head -c 1)"
+}
+get_random_ttl() {
+	# Get a random dec value between 0 and 255
+	printf "%d" "0x$(tr -dc '0-9a-f' < /dev/urandom | head -c 2)"
+}
+get_field() {
+	# Expects to get the 'head -n 1' of a captured frame by tcpdump.
+	# Parses this first line and returns the specified field.
+	local field="$1"
+	local input="$2"
+	local found=false
+	input="$(echo "$input" | tr -d '(),')"
+	for input_field in $input; do
+		if $found; then
+			echo "$input_field"
+			return
+		fi
+		# The next field that we iterate over is the looked for value
+		if [ "$input_field" = "$field" ]; then
+			found=true
+		fi
+	done
+	echo "0"
+}
+setup() {
+	local type="$1"
+	local outer="$2"
+	local inner="$3"
+	local tos_ttl="$4"
+	local vlan="$5"
+	local test_tos="0x00"
+	local test_ttl="0"
+
+	# We don't want a test-tos of 0x00,
+	# because this is the value that we get when no tos is set.
+	expected_tos="$(get_random_tos)"
+	while [ "$expected_tos" = "0x00" ]; do
+		expected_tos="$(get_random_tos)"
+	done
+	if [ "$tos_ttl" = "random" ]; then
+		test_tos="$expected_tos"
+		tos="fixed $test_tos"
+	elif [ "$tos_ttl" = "inherit" ]; then
+		test_tos="$tos_ttl"
+		tos="inherit $expected_tos"
+	fi
+
+	# We don't want a test-ttl of 64 or 0,
+	# because 64 is when no ttl is set and 0 is not a valid ttl.
+	expected_ttl="$(get_random_ttl)"
+	while [ "$expected_ttl" = "64" ] || [ "$expected_ttl" = "0" ]; do
+		expected_ttl="$(get_random_ttl)"
+	done
+
+	if [ "$tos_ttl" = "random" ]; then
+		test_ttl="$expected_ttl"
+		ttl="fixed $test_ttl"
+	elif [ "$tos_ttl" = "inherit" ]; then
+		test_ttl="$tos_ttl"
+		ttl="inherit $expected_ttl"
+	fi
+	printf "│%7s │%6s │%6s │%13s │%13s │%6s │" \
+	"$type" "$outer" "$inner" "$tos" "$ttl" "$vlan"
+
+	# Create netns NS0 and NS1 and connect them with a veth pair
+	ip netns add "${NS0}"
+	ip netns add "${NS1}"
+	ip link add name veth0 netns "${NS0}" type veth \
+		peer name veth1 netns "${NS1}"
+	ip -netns "${NS0}" link set dev veth0 up
+	ip -netns "${NS1}" link set dev veth1 up
+	ip -netns "${NS0}" address flush dev veth0
+	ip -netns "${NS1}" address flush dev veth1
+
+	local local_addr1=""
+	local local_addr2=""
+	if [ "$type" = "gre" ] || [ "$type" = "vxlan" ]; then
+		if [ "$outer" = "4" ]; then
+			local_addr1="local 198.18.0.1"
+			local_addr2="local 198.18.0.2"
+		elif [ "$outer" = "6" ]; then
+			local_addr1="local fdd1:ced0:5d88:3fce::1"
+			local_addr2="local fdd1:ced0:5d88:3fce::2"
+		fi
+	fi
+	local vxlan=""
+	if [ "$type" = "vxlan" ]; then
+		vxlan="vni 100 dstport 4789"
+	fi
+	local geneve=""
+	if [ "$type" = "geneve" ]; then
+		geneve="vni 100"
+	fi
+	# Create tunnel and assign outer IPv4/IPv6 addresses
+	if [ "$outer" = "4" ]; then
+		if [ "$type" = "gre" ]; then
+			type="gretap"
+		fi
+		ip -netns "${NS0}" address add 198.18.0.1/24 dev veth0
+		ip -netns "${NS1}" address add 198.18.0.2/24 dev veth1
+		ip -netns "${NS0}" link add name tep0 type $type $local_addr1 \
+			remote 198.18.0.2 tos $test_tos ttl $test_ttl         \
+			$vxlan $geneve
+		ip -netns "${NS1}" link add name tep1 type $type $local_addr2 \
+			remote 198.18.0.1 tos $test_tos ttl $test_ttl         \
+			$vxlan $geneve
+	elif [ "$outer" = "6" ]; then
+		if [ "$type" = "gre" ]; then
+			type="ip6gretap"
+		fi
+		ip -netns "${NS0}" address add fdd1:ced0:5d88:3fce::1/64 \
+			dev veth0 nodad
+		ip -netns "${NS1}" address add fdd1:ced0:5d88:3fce::2/64 \
+			dev veth1 nodad
+		ip -netns "${NS0}" link add name tep0 type $type $local_addr1 \
+			remote fdd1:ced0:5d88:3fce::2 tos $test_tos           \
+			ttl $test_ttl $vxlan $geneve
+		ip -netns "${NS1}" link add name tep1 type $type $local_addr2 \
+			remote fdd1:ced0:5d88:3fce::1 tos $test_tos           \
+			ttl $test_ttl $vxlan $geneve
+	fi
+
+	# Bring L2-tunnel link up and create VLAN on top
+	ip -netns "${NS0}" link set tep0 up
+	ip -netns "${NS1}" link set tep1 up
+	ip -netns "${NS0}" address flush dev tep0
+	ip -netns "${NS1}" address flush dev tep1
+	local parent
+	if $vlan; then
+		parent="vlan99-"
+		ip -netns "${NS0}" link add link tep0 name ${parent}0 \
+			type vlan id 99
+		ip -netns "${NS1}" link add link tep1 name ${parent}1 \
+			type vlan id 99
+		ip -netns "${NS0}" link set dev ${parent}0 up
+		ip -netns "${NS1}" link set dev ${parent}1 up
+		ip -netns "${NS0}" address flush dev ${parent}0
+		ip -netns "${NS1}" address flush dev ${parent}1
+	else
+		parent="tep"
+	fi
+
+	# Assign inner IPv4/IPv6 addresses
+	if [ "$inner" = "4" ] || [ "$inner" = "other" ]; then
+		ip -netns "${NS0}" address add 198.19.0.1/24 brd + dev ${parent}0
+		ip -netns "${NS1}" address add 198.19.0.2/24 brd + dev ${parent}1
+	elif [ "$inner" = "6" ]; then
+		ip -netns "${NS0}" address add fdd4:96cf:4eae:443b::1/64 \
+			dev ${parent}0 nodad
+		ip -netns "${NS1}" address add fdd4:96cf:4eae:443b::2/64 \
+			dev ${parent}1 nodad
+	fi
+}
+
+verify() {
+	local outer="$1"
+	local inner="$2"
+	local tos_ttl="$3"
+	local vlan="$4"
+
+	local ping_pid out captured_tos captured_ttl result
+
+	local ping_dst
+	if [ "$inner" = "4" ]; then
+		ping_dst="198.19.0.2"
+	elif [ "$inner" = "6" ]; then
+		ping_dst="fdd4:96cf:4eae:443b::2"
+	elif [ "$inner" = "other" ]; then
+		ping_dst="198.19.0.3" # Generates ARPs which are not IPv4/IPv6
+	fi
+	if [ "$tos_ttl" = "inherit" ]; then
+		${RUN_NS0} ping -i 0.1 $ping_dst -Q "$expected_tos"          \
+			 -t "$expected_ttl" 2>/dev/null 1>&2 & ping_pid="$!"
+	else
+		${RUN_NS0} ping -i 0.1 $ping_dst 2>/dev/null 1>&2 & ping_pid="$!"
+	fi
+	local tunnel_type_offset tunnel_type_proto req_proto_offset req_offset
+	if [ "$type" = "gre" ]; then
+		tunnel_type_proto="0x2f"
+	elif [ "$type" = "vxlan" ] || [ "$type" = "geneve" ]; then
+		tunnel_type_proto="0x11"
+	fi
+	if [ "$outer" = "4" ]; then
+		tunnel_type_offset="9"
+		if [ "$inner" = "4" ]; then
+			req_proto_offset="47"
+			req_offset="58"
+			if [ "$type" = "vxlan" ] || [ "$type" = "geneve" ]; then
+				req_proto_offset="$((req_proto_offset + 12))"
+				req_offset="$((req_offset + 12))"
+			fi
+			if $vlan; then
+				req_proto_offset="$((req_proto_offset + 4))"
+				req_offset="$((req_offset + 4))"
+			fi
+			out="$(${RUN_NS0} tcpdump --immediate-mode -p -c 1 -v \
+				-i veth0 -n                                   \
+				ip[$tunnel_type_offset] = $tunnel_type_proto and \
+				ip[$req_proto_offset] = 0x01 and              \
+				ip[$req_offset] = 0x08 2>/dev/null            \
+				| head -n 1)"
+		elif [ "$inner" = "6" ]; then
+			req_proto_offset="44"
+			req_offset="78"
+			if [ "$type" = "vxlan" ] || [ "$type" = "geneve" ]; then
+				req_proto_offset="$((req_proto_offset + 12))"
+				req_offset="$((req_offset + 12))"
+			fi
+			if $vlan; then
+				req_proto_offset="$((req_proto_offset + 4))"
+				req_offset="$((req_offset + 4))"
+			fi
+			out="$(${RUN_NS0} tcpdump --immediate-mode -p -c 1 -v \
+				-i veth0 -n                                   \
+				ip[$tunnel_type_offset] = $tunnel_type_proto and \
+				ip[$req_proto_offset] = 0x3a and              \
+				ip[$req_offset] = 0x80 2>/dev/null            \
+				| head -n 1)"
+		elif [ "$inner" = "other" ]; then
+			req_proto_offset="36"
+			req_offset="45"
+			if [ "$type" = "vxlan" ] || [ "$type" = "geneve" ]; then
+				req_proto_offset="$((req_proto_offset + 12))"
+				req_offset="$((req_offset + 12))"
+			fi
+			if $vlan; then
+				req_proto_offset="$((req_proto_offset + 4))"
+				req_offset="$((req_offset + 4))"
+			fi
+			if [ "$tos_ttl" = "inherit" ]; then
+				expected_tos="0x00"
+				expected_ttl="64"
+			fi
+			out="$(${RUN_NS0} tcpdump --immediate-mode -p -c 1 -v \
+				-i veth0 -n                                   \
+				ip[$tunnel_type_offset] = $tunnel_type_proto and \
+				ip[$req_proto_offset] = 0x08 and              \
+				ip[$((req_proto_offset + 1))] = 0x06 and      \
+				ip[$req_offset] = 0x01 2>/dev/null            \
+				| head -n 1)"
+		fi
+	elif [ "$outer" = "6" ]; then
+		if [ "$type" = "gre" ]; then
+			tunnel_type_offset="40"
+		elif [ "$type" = "vxlan" ] || [ "$type" = "geneve" ]; then
+			tunnel_type_offset="6"
+		fi
+		if [ "$inner" = "4" ]; then
+			local req_proto_offset="75"
+			local req_offset="86"
+			if [ "$type" = "vxlan" ] || [ "$type" = "geneve" ]; then
+				req_proto_offset="$((req_proto_offset + 4))"
+				req_offset="$((req_offset + 4))"
+			fi
+			if $vlan; then
+				req_proto_offset="$((req_proto_offset + 4))"
+				req_offset="$((req_offset + 4))"
+			fi
+			out="$(${RUN_NS0} tcpdump --immediate-mode -p -c 1 -v \
+				-i veth0 -n                                   \
+				ip6[$tunnel_type_offset] = $tunnel_type_proto and \
+				ip6[$req_proto_offset] = 0x01 and             \
+				ip6[$req_offset] = 0x08 2>/dev/null           \
+				| head -n 1)"
+		elif [ "$inner" = "6" ]; then
+			local req_proto_offset="72"
+			local req_offset="106"
+			if [ "$type" = "vxlan" ] || [ "$type" = "geneve" ]; then
+				req_proto_offset="$((req_proto_offset + 4))"
+				req_offset="$((req_offset + 4))"
+			fi
+			if $vlan; then
+				req_proto_offset="$((req_proto_offset + 4))"
+				req_offset="$((req_offset + 4))"
+			fi
+			out="$(${RUN_NS0} tcpdump --immediate-mode -p -c 1 -v \
+				-i veth0 -n                                   \
+				ip6[$tunnel_type_offset] = $tunnel_type_proto and \
+				ip6[$req_proto_offset] = 0x3a and             \
+				ip6[$req_offset] = 0x80 2>/dev/null           \
+				| head -n 1)"
+		elif [ "$inner" = "other" ]; then
+			local req_proto_offset="64"
+			local req_offset="73"
+			if [ "$type" = "vxlan" ] || [ "$type" = "geneve" ]; then
+				req_proto_offset="$((req_proto_offset + 4))"
+				req_offset="$((req_offset + 4))"
+			fi
+			if $vlan; then
+				req_proto_offset="$((req_proto_offset + 4))"
+				req_offset="$((req_offset + 4))"
+			fi
+			if [ "$tos_ttl" = "inherit" ]; then
+				expected_tos="0x00"
+				expected_ttl="64"
+			fi
+			out="$(${RUN_NS0} tcpdump --immediate-mode -p -c 1 -v \
+				-i veth0 -n                                   \
+				ip6[$tunnel_type_offset] = $tunnel_type_proto and \
+				ip6[$req_proto_offset] = 0x08 and             \
+				ip6[$((req_proto_offset + 1))] = 0x06 and     \
+				ip6[$req_offset] = 0x01 2>/dev/null           \
+				| head -n 1)"
+		fi
+	fi
+	kill -9 $ping_pid
+	wait $ping_pid 2>/dev/null || true
+	result="FAIL"
+	if [ "$outer" = "4" ]; then
+		captured_ttl="$(get_field "ttl" "$out")"
+		captured_tos="$(printf "0x%02x" "$(get_field "tos" "$out")")"
+		if [ "$captured_tos" = "$expected_tos" ] &&
+		   [ "$captured_ttl" = "$expected_ttl" ]; then
+			result="OK"
+		fi
+	elif [ "$outer" = "6" ]; then
+		captured_ttl="$(get_field "hlim" "$out")"
+		captured_tos="$(printf "0x%02x" "$(get_field "class" "$out")")"
+		if [ "$captured_tos" = "$expected_tos" ] &&
+		   [ "$captured_ttl" = "$expected_ttl" ]; then
+			result="OK"
+		fi
+	fi
+
+	printf "%7s │\n" "$result"
+	if [ "$result" = "FAIL" ]; then
+		failed=true
+		if [ "$captured_tos" != "$expected_tos" ]; then
+			printf "│%43s%27s │\n" \
+			"Expected TOS value: $expected_tos" \
+			"Captured TOS value: $captured_tos"
+		fi
+		if [ "$captured_ttl" != "$expected_ttl" ]; then
+			printf "│%43s%27s │\n" \
+			"Expected TTL value: $expected_ttl" \
+			"Captured TTL value: $captured_ttl"
+		fi
+		printf "│%71s│\n" " "
+	fi
+}
+
+cleanup() {
+	ip netns del "${NS0}" 2>/dev/null
+	ip netns del "${NS1}" 2>/dev/null
+}
+
+exit_handler() {
+	# Don't exit immediately if one of the intermediate commands fails.
+	# We might be called at the end of the script, when the network
+	# namespaces have already been deleted. So cleanup() may fail, but we
+	# still need to run until 'exit $ERR' or the script won't return the
+	# correct error code.
+	set +e
+
+	cleanup
+
+	exit $ERR
+}
+
+# Restore the default SIGINT handler (just in case) and exit.
+# The exit handler will take care of cleaning everything up.
+interrupted() {
+	trap - INT
+
+	exit $ERR
+}
+
+set -e
+trap exit_handler EXIT
+trap interrupted INT
+
+printf "┌────────┬───────┬───────┬──────────────┬"
+printf "──────────────┬───────┬────────┐\n"
+for type in gre vxlan geneve; do
+	if ! $(modprobe "$type" 2>/dev/null); then
+		continue
+	fi
+	for outer in 4 6; do
+		printf "├────────┼───────┼───────┼──────────────┼"
+		printf "──────────────┼───────┼────────┤\n"
+		printf "│  Type  │ outer | inner │     tos      │"
+		printf "      ttl     │  vlan │ result │\n"
+		for inner in 4 6 other; do
+			printf "├────────┼───────┼───────┼──────────────┼"
+			printf "──────────────┼───────┼────────┤\n"
+			for tos_ttl in inherit random; do
+				for vlan in false true; do
+					setup "$type" "$outer" "$inner" \
+					"$tos_ttl" "$vlan"
+					verify "$outer" "$inner" "$tos_ttl" \
+					"$vlan"
+					cleanup
+				done
+			done
+		done
+	done
+done
+printf "└────────┴───────┴───────┴──────────────┴"
+printf "──────────────┴───────┴────────┘\n"
+
+# All tests done.
+# Set ERR appropriately: it will be returned by the exit handler.
+if $failed; then
+	ERR=1
+else
+	ERR=0
+fi