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gro.sh and toeplitz.sh used to source in one of two setup scripts depending on whether the test was expected to be run against veth or a real device. veth testing is replaced by netdevsim and existing "remote endpoint" support in our Python tests. Add a script which sets up loopback mode. The usage is a little bit more complicated than running the scripts used to be. Testing used to work like this: ./../gro.sh -i eth0 ... now the "setup script" has to be run explicitly: NETIF=eth0 ./../ksft_setup_loopback.sh ./../gro.sh But the functionality itself is retained. Reviewed-by: Petr Machata <petrm@nvidia.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20251120021024.2944527-13-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
112 lines
3.4 KiB
Bash
Executable File
112 lines
3.4 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Setup script for running ksft tests over a real interface in loopback mode.
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# This scripts replaces the historical setup_loopback.sh. It puts
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# a (presumably) real hardware interface into loopback mode, creates macvlan
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# interfaces on top and places them in a network namespace for isolation.
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#
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# NETIF env variable must be exported to indicate the real target device.
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# Note that the test will override NETIF with one of the macvlans, the
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# actual ksft test will only see the macvlans.
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#
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# Example use:
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# export NETIF=eth0
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# ./net/lib/ksft_setup_loopback.sh ./drivers/net/gro.py
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if [ -z "$NETIF" ]; then
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echo "Error: NETIF variable not set"
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exit 1
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fi
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if ! [ -d "/sys/class/net/$NETIF" ]; then
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echo "Error: Can't find $NETIF, invalid netdevice"
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exit 1
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fi
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# Save original settings for cleanup
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readonly FLUSH_PATH="/sys/class/net/${NETIF}/gro_flush_timeout"
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readonly IRQ_PATH="/sys/class/net/${NETIF}/napi_defer_hard_irqs"
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FLUSH_TIMEOUT="$(< "${FLUSH_PATH}")"
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readonly FLUSH_TIMEOUT
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HARD_IRQS="$(< "${IRQ_PATH}")"
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readonly HARD_IRQS
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SERVER_NS=$(mktemp -u server-XXXXXXXX)
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readonly SERVER_NS
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CLIENT_NS=$(mktemp -u client-XXXXXXXX)
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readonly CLIENT_NS
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readonly SERVER_MAC="aa:00:00:00:00:02"
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readonly CLIENT_MAC="aa:00:00:00:00:01"
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# ksft expects addresses to communicate with remote
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export LOCAL_V6=2001:db8:1::1
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export REMOTE_V6=2001:db8:1::2
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cleanup() {
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local exit_code=$?
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echo "Cleaning up..."
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# Remove macvlan interfaces and namespaces
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ip -netns "${SERVER_NS}" link del dev server 2>/dev/null || true
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ip netns del "${SERVER_NS}" 2>/dev/null || true
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ip -netns "${CLIENT_NS}" link del dev client 2>/dev/null || true
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ip netns del "${CLIENT_NS}" 2>/dev/null || true
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# Disable loopback
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ethtool -K "${NETIF}" loopback off 2>/dev/null || true
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sleep 1
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echo "${FLUSH_TIMEOUT}" >"${FLUSH_PATH}"
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echo "${HARD_IRQS}" >"${IRQ_PATH}"
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exit $exit_code
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}
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trap cleanup EXIT INT TERM
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# Enable loopback mode
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echo "Enabling loopback on ${NETIF}..."
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ethtool -K "${NETIF}" loopback on || {
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echo "Failed to enable loopback mode"
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exit 1
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}
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# The interface may need time to get carrier back, but selftests
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# will wait for carrier, so no need to wait / sleep here.
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# Use timer on host to trigger the network stack
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# Also disable device interrupt to not depend on NIC interrupt
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# Reduce test flakiness caused by unexpected interrupts
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echo 100000 >"${FLUSH_PATH}"
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echo 50 >"${IRQ_PATH}"
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# Create server namespace with macvlan
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ip netns add "${SERVER_NS}"
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ip link add link "${NETIF}" dev server address "${SERVER_MAC}" type macvlan
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ip link set dev server netns "${SERVER_NS}"
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ip -netns "${SERVER_NS}" link set dev server up
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ip -netns "${SERVER_NS}" addr add $LOCAL_V6/64 dev server
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ip -netns "${SERVER_NS}" link set dev lo up
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# Create client namespace with macvlan
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ip netns add "${CLIENT_NS}"
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ip link add link "${NETIF}" dev client address "${CLIENT_MAC}" type macvlan
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ip link set dev client netns "${CLIENT_NS}"
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ip -netns "${CLIENT_NS}" link set dev client up
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ip -netns "${CLIENT_NS}" addr add $REMOTE_V6/64 dev client
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ip -netns "${CLIENT_NS}" link set dev lo up
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echo "Setup complete!"
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echo " Device: ${NETIF}"
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echo " Server NS: ${SERVER_NS}"
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echo " Client NS: ${CLIENT_NS}"
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echo ""
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# Setup environment variables for tests
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export NETIF=server
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export REMOTE_TYPE=netns
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export REMOTE_ARGS="${CLIENT_NS}"
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# Run the command
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ip netns exec "${SERVER_NS}" "$@"
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