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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /tools/testing/selftests/bpf/test_xdp_vlan.sh
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/bpf/test_xdp_vlan.sh')
-rwxr-xr-xtools/testing/selftests/bpf/test_xdp_vlan.sh233
1 files changed, 233 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/test_xdp_vlan.sh b/tools/testing/selftests/bpf/test_xdp_vlan.sh
new file mode 100755
index 000000000..fbcaa9f01
--- /dev/null
+++ b/tools/testing/selftests/bpf/test_xdp_vlan.sh
@@ -0,0 +1,233 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Author: Jesper Dangaard Brouer <hawk@kernel.org>
+
+# Kselftest framework requirement - SKIP code is 4.
+readonly KSFT_SKIP=4
+readonly NS1="ns1-$(mktemp -u XXXXXX)"
+readonly NS2="ns2-$(mktemp -u XXXXXX)"
+
+# Allow wrapper scripts to name test
+if [ -z "$TESTNAME" ]; then
+ TESTNAME=xdp_vlan
+fi
+
+# Default XDP mode
+XDP_MODE=xdpgeneric
+
+usage() {
+ echo "Testing XDP + TC eBPF VLAN manipulations: $TESTNAME"
+ echo ""
+ echo "Usage: $0 [-vfh]"
+ echo " -v | --verbose : Verbose"
+ echo " --flush : Flush before starting (e.g. after --interactive)"
+ echo " --interactive : Keep netns setup running after test-run"
+ echo " --mode=XXX : Choose XDP mode (xdp | xdpgeneric | xdpdrv)"
+ echo ""
+}
+
+valid_xdp_mode()
+{
+ local mode=$1
+
+ case "$mode" in
+ xdpgeneric | xdpdrv | xdp)
+ return 0
+ ;;
+ *)
+ return 1
+ esac
+}
+
+cleanup()
+{
+ local status=$?
+
+ if [ "$status" = "0" ]; then
+ echo "selftests: $TESTNAME [PASS]";
+ else
+ echo "selftests: $TESTNAME [FAILED]";
+ fi
+
+ if [ -n "$INTERACTIVE" ]; then
+ echo "Namespace setup still active explore with:"
+ echo " ip netns exec ${NS1} bash"
+ echo " ip netns exec ${NS2} bash"
+ exit $status
+ fi
+
+ set +e
+ ip link del veth1 2> /dev/null
+ ip netns del ${NS1} 2> /dev/null
+ ip netns del ${NS2} 2> /dev/null
+}
+
+# Using external program "getopt" to get --long-options
+OPTIONS=$(getopt -o hvfi: \
+ --long verbose,flush,help,interactive,debug,mode: -- "$@")
+if (( $? != 0 )); then
+ usage
+ echo "selftests: $TESTNAME [FAILED] Error calling getopt, unknown option?"
+ exit 2
+fi
+eval set -- "$OPTIONS"
+
+## --- Parse command line arguments / parameters ---
+while true; do
+ case "$1" in
+ -v | --verbose)
+ export VERBOSE=yes
+ shift
+ ;;
+ -i | --interactive | --debug )
+ INTERACTIVE=yes
+ shift
+ ;;
+ -f | --flush )
+ cleanup
+ shift
+ ;;
+ --mode )
+ shift
+ XDP_MODE=$1
+ shift
+ ;;
+ -- )
+ shift
+ break
+ ;;
+ -h | --help )
+ usage;
+ echo "selftests: $TESTNAME [SKIP] usage help info requested"
+ exit $KSFT_SKIP
+ ;;
+ * )
+ shift
+ break
+ ;;
+ esac
+done
+
+if [ "$EUID" -ne 0 ]; then
+ echo "selftests: $TESTNAME [FAILED] need root privileges"
+ exit 1
+fi
+
+valid_xdp_mode $XDP_MODE
+if [ $? -ne 0 ]; then
+ echo "selftests: $TESTNAME [FAILED] unknown XDP mode ($XDP_MODE)"
+ exit 1
+fi
+
+ip link set dev lo xdpgeneric off 2>/dev/null > /dev/null
+if [ $? -ne 0 ]; then
+ echo "selftests: $TESTNAME [SKIP] need ip xdp support"
+ exit $KSFT_SKIP
+fi
+
+# Interactive mode likely require us to cleanup netns
+if [ -n "$INTERACTIVE" ]; then
+ ip link del veth1 2> /dev/null
+ ip netns del ${NS1} 2> /dev/null
+ ip netns del ${NS2} 2> /dev/null
+fi
+
+# Exit on failure
+set -e
+
+# Some shell-tools dependencies
+which ip > /dev/null
+which tc > /dev/null
+which ethtool > /dev/null
+
+# Make rest of shell verbose, showing comments as doc/info
+if [ -n "$VERBOSE" ]; then
+ set -v
+fi
+
+# Create two namespaces
+ip netns add ${NS1}
+ip netns add ${NS2}
+
+# Run cleanup if failing or on kill
+trap cleanup 0 2 3 6 9
+
+# Create veth pair
+ip link add veth1 type veth peer name veth2
+
+# Move veth1 and veth2 into the respective namespaces
+ip link set veth1 netns ${NS1}
+ip link set veth2 netns ${NS2}
+
+# NOTICE: XDP require VLAN header inside packet payload
+# - Thus, disable VLAN offloading driver features
+# - For veth REMEMBER TX side VLAN-offload
+#
+# Disable rx-vlan-offload (mostly needed on ns1)
+ip netns exec ${NS1} ethtool -K veth1 rxvlan off
+ip netns exec ${NS2} ethtool -K veth2 rxvlan off
+#
+# Disable tx-vlan-offload (mostly needed on ns2)
+ip netns exec ${NS2} ethtool -K veth2 txvlan off
+ip netns exec ${NS1} ethtool -K veth1 txvlan off
+
+export IPADDR1=100.64.41.1
+export IPADDR2=100.64.41.2
+
+# In ns1/veth1 add IP-addr on plain net_device
+ip netns exec ${NS1} ip addr add ${IPADDR1}/24 dev veth1
+ip netns exec ${NS1} ip link set veth1 up
+
+# In ns2/veth2 create VLAN device
+export VLAN=4011
+export DEVNS2=veth2
+ip netns exec ${NS2} ip link add link $DEVNS2 name $DEVNS2.$VLAN type vlan id $VLAN
+ip netns exec ${NS2} ip addr add ${IPADDR2}/24 dev $DEVNS2.$VLAN
+ip netns exec ${NS2} ip link set $DEVNS2 up
+ip netns exec ${NS2} ip link set $DEVNS2.$VLAN up
+
+# Bringup lo in netns (to avoids confusing people using --interactive)
+ip netns exec ${NS1} ip link set lo up
+ip netns exec ${NS2} ip link set lo up
+
+# At this point, the hosts cannot reach each-other,
+# because ns2 are using VLAN tags on the packets.
+
+ip netns exec ${NS2} sh -c 'ping -W 1 -c 1 100.64.41.1 || echo "Success: First ping must fail"'
+
+
+# Now we can use the test_xdp_vlan.c program to pop/push these VLAN tags
+# ----------------------------------------------------------------------
+# In ns1: ingress use XDP to remove VLAN tags
+export DEVNS1=veth1
+export BPF_FILE=test_xdp_vlan.bpf.o
+
+# First test: Remove VLAN by setting VLAN ID 0, using "xdp_vlan_change"
+export XDP_PROG=xdp_vlan_change
+ip netns exec ${NS1} ip link set $DEVNS1 $XDP_MODE object $BPF_FILE section $XDP_PROG
+
+# In ns1: egress use TC to add back VLAN tag 4011
+# (del cmd)
+# tc qdisc del dev $DEVNS1 clsact 2> /dev/null
+#
+ip netns exec ${NS1} tc qdisc add dev $DEVNS1 clsact
+ip netns exec ${NS1} tc filter add dev $DEVNS1 egress \
+ prio 1 handle 1 bpf da obj $BPF_FILE sec tc_vlan_push
+
+# Now the namespaces can reach each-other, test with ping:
+ip netns exec ${NS2} ping -i 0.2 -W 2 -c 2 $IPADDR1
+ip netns exec ${NS1} ping -i 0.2 -W 2 -c 2 $IPADDR2
+
+# Second test: Replace xdp prog, that fully remove vlan header
+#
+# Catch kernel bug for generic-XDP, that does didn't allow us to
+# remove a VLAN header, because skb->protocol still contain VLAN
+# ETH_P_8021Q indication, and this cause overwriting of our changes.
+#
+export XDP_PROG=xdp_vlan_remove_outer2
+ip netns exec ${NS1} ip link set $DEVNS1 $XDP_MODE off
+ip netns exec ${NS1} ip link set $DEVNS1 $XDP_MODE object $BPF_FILE section $XDP_PROG
+
+# Now the namespaces should still be able reach each-other, test with ping:
+ip netns exec ${NS2} ping -i 0.2 -W 2 -c 2 $IPADDR1
+ip netns exec ${NS1} ping -i 0.2 -W 2 -c 2 $IPADDR2