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RDMA/selftests: Add rxe_netns_names test
Add a kselftest script that exercises per-netns RDMA device naming with RXE. Cover duplicate names across namespaces, move conflict handling, move-with-rename, and same-namespace rename requests. Signed-off-by: Jiri Pirko <jiri@nvidia.com> Link: https://patch.msgid.link/20260716132316.1495242-15-jiri@resnulli.us Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Jiri Pirko
Leon Romanovsky
parent
acf9cbb06f
commit
ecdcc8a455
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@ -3,6 +3,7 @@ TEST_PROGS := rxe_rping_between_netns.sh \
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rxe_ipv6.sh \
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rxe_socket_with_netns.sh \
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rxe_test_NETDEV_UNREGISTER.sh \
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rxe_sent_rcvd_bytes.sh
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rxe_sent_rcvd_bytes.sh \
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rxe_netns_names.sh
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include ../lib.mk
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@ -1,3 +1,5 @@
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CONFIG_TUN
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CONFIG_VETH
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CONFIG_DUMMY
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CONFIG_NET_NS
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CONFIG_RDMA_RXE
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334
tools/testing/selftests/rdma/rxe_netns_names.sh
Executable file
334
tools/testing/selftests/rdma/rxe_netns_names.sh
Executable file
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@ -0,0 +1,334 @@
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Exercise RDMA device name handling across network namespaces.
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source "$(dirname "$0")/../kselftest/ktap_helpers.sh"
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NAME_PREFIX="rxe_netns_names_$$"
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NETDEV_PREFIX="rxn$$"
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NS1="${NAME_PREFIX}ns1"
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NS2="${NAME_PREFIX}ns2"
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RXE_A="${NAME_PREFIX}rxe_a"
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RXE_B="${NAME_PREFIX}rxe_b"
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RXE_SAME="${NAME_PREFIX}rxe_same"
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RXE_NEW="${NAME_PREFIX}rxe_new"
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DUMMY_A="${NETDEV_PREFIX}a"
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DUMMY_B="${NETDEV_PREFIX}b"
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OLD_MODE=""
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MODE_CHANGED=0
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MODS=("dummy" "rdma_rxe")
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TEST_SAME_NAMES="same RDMA device name can exist in two net namespaces"
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TEST_MOVE_CONFLICT="move without rename fails on destination name conflict"
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TEST_MOVE_RENAME="move then rename succeeds"
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TEST_COMBINED_MOVE_RENAME="move with requested destination name succeeds"
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TEST_SAME_NETNS_DUP_RENAME="same-netns rename rejects duplicate name"
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TEST_TEARDOWN_RETURN="netns delete returns device to init_net and renames on conflict"
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ksft_skip()
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{
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ktap_skip_all "$*"
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exit "$KSFT_SKIP"
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}
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fail()
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{
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ktap_exit_fail_msg "$*"
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}
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need_cmd()
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{
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command -v "$1" >/dev/null 2>&1 || ksft_skip "missing command: $1"
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}
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rdma_ns()
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{
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local ns=$1
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shift
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ip netns exec "$ns" rdma "$@"
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}
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rdma_dev_exists()
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{
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local ns=$1
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local dev=$2
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if [ -n "$ns" ]; then
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rdma_ns "$ns" dev show "$dev" >/dev/null 2>&1
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else
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rdma dev show "$dev" >/dev/null 2>&1
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fi
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}
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add_dummy()
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{
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local netdev=$1
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ip link add "$netdev" type dummy || return 1
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ip link set "$netdev" up || return 1
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}
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add_rxe()
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{
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local dev=$1
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local netdev=$2
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rdma link add "$dev" type rxe netdev "$netdev"
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}
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rdma_dev_on_netdev()
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{
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local netdev=$1
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rdma link show 2>/dev/null | awk -v want="$netdev" '
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{
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for (i = 1; i < NF; i++)
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if ($i == "netdev" && $(i + 1) == want) {
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dev = $2
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sub(/\/.*/, "", dev)
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print dev
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exit
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}
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}'
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}
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wait_rdma_dev_on_netdev()
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{
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local netdev=$1
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local dev
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local i
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for i in $(seq 1 50); do
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dev=$(rdma_dev_on_netdev "$netdev")
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if [ -n "$dev" ]; then
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echo "$dev"
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return 0
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fi
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sleep 0.1
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done
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return 1
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}
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# ip link del returns after NETDEV_UNREGISTER, but rxe tears the RDMA device
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# down asynchronously via ib_unregister_device_queued(). Wait until our names
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# are gone.
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wait_rdma_devs_gone()
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{
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local i name ns
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local names=("$RXE_A" "$RXE_B" "$RXE_SAME" "$RXE_NEW")
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for i in $(seq 1 50); do
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local found=0
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for name in "${names[@]}"; do
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if rdma_dev_exists "" "$name"; then
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found=1
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break
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fi
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for ns in "$NS1" "$NS2"; do
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ip netns exec "$ns" true 2>/dev/null || continue
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if rdma_dev_exists "$ns" "$name"; then
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found=1
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break 2
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fi
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done
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done
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[ "$found" -eq 0 ] && return 0
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sleep 0.1
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done
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return 1
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}
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setup_devs()
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{
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cleanup_devs || return 1
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add_dummy "$DUMMY_A" || return 1
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add_dummy "$DUMMY_B" || return 1
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add_rxe "$RXE_A" "$DUMMY_A" || return 1
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add_rxe "$RXE_B" "$DUMMY_B" || return 1
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}
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cleanup_devs()
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{
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ip link del "$DUMMY_A" 2>/dev/null
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ip link del "$DUMMY_B" 2>/dev/null
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wait_rdma_devs_gone
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}
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setup()
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{
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OLD_MODE=$(rdma system show 2>/dev/null |
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sed -n 's/.*netns \([^ ]*\).*/\1/p')
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[ -n "$OLD_MODE" ] || ksft_skip "failed to read RDMA netns mode"
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rdma system set netns exclusive >/dev/null 2>&1 ||
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ksft_skip "rdma netns exclusive mode is not supported"
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MODE_CHANGED=1
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ip netns add "$NS1" || return 1
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ip netns add "$NS2" || return 1
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}
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# ip netns del returns before rdma_dev_exit_net() removes the net from
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# rdma_nets. rdma_compatdev_set() returns -EBUSY until that completes, so
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# retry the mode restore instead of leaving the system in exclusive mode.
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restore_netns_mode()
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{
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local i
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[ "$MODE_CHANGED" -eq 1 ] || return 0
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for i in $(seq 1 50); do
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if rdma system set netns "$OLD_MODE" >/dev/null 2>&1; then
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MODE_CHANGED=0
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return 0
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fi
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sleep 0.1
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done
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echo "warning: failed to restore RDMA netns mode to $OLD_MODE" >&2
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return 1
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}
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cleanup()
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{
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cleanup_devs
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ip netns del "$NS1" 2>/dev/null
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ip netns del "$NS2" 2>/dev/null
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restore_netns_mode
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for m in "${MODS[@]}"; do
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modprobe -r "$m" 2>/dev/null
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done
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}
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rdma_supports_combined_move_rename()
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{
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rdma dev help 2>&1 | grep -Eq 'netns .*name|name .*netns'
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}
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[ "$(id -u)" -eq 0 ] || ksft_skip "must be run as root"
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need_cmd ip
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need_cmd rdma
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need_cmd modprobe
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trap cleanup EXIT
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for m in "${MODS[@]}"; do
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modinfo "$m" >/dev/null 2>&1 || ksft_skip "module $m not found"
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modprobe "$m" || fail "failed to load $m"
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done
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setup || fail "failed to create net namespaces"
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ktap_print_header
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ktap_set_plan 6
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if setup_devs &&
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rdma dev set "$RXE_A" netns "$NS1" &&
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rdma_ns "$NS1" dev set "$RXE_A" name "$RXE_SAME" &&
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rdma dev set "$RXE_B" netns "$NS2" &&
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rdma_ns "$NS2" dev set "$RXE_B" name "$RXE_SAME" &&
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rdma_dev_exists "$NS1" "$RXE_SAME" &&
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rdma_dev_exists "$NS2" "$RXE_SAME"; then
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ktap_test_pass "$TEST_SAME_NAMES"
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else
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ktap_test_fail "$TEST_SAME_NAMES"
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fi
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cleanup_devs
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if ! setup_devs ||
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! rdma dev set "$RXE_A" netns "$NS1" ||
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! rdma_ns "$NS1" dev set "$RXE_A" name "$RXE_SAME" ||
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! rdma dev set "$RXE_B" netns "$NS2" ||
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! rdma_ns "$NS2" dev set "$RXE_B" name "$RXE_SAME"; then
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ktap_test_fail "$TEST_MOVE_CONFLICT"
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elif rdma_ns "$NS1" dev set "$RXE_SAME" netns "$NS2" >/dev/null 2>&1; then
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ktap_test_fail "$TEST_MOVE_CONFLICT"
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elif rdma_dev_exists "$NS1" "$RXE_SAME" &&
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rdma_dev_exists "$NS2" "$RXE_SAME"; then
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ktap_test_pass "$TEST_MOVE_CONFLICT"
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else
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ktap_test_fail "$TEST_MOVE_CONFLICT"
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fi
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cleanup_devs
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if ! setup_devs; then
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ktap_test_fail "$TEST_MOVE_RENAME"
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elif rdma dev set "$RXE_A" netns "$NS2" &&
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rdma_ns "$NS2" dev set "$RXE_A" name "$RXE_NEW"; then
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if rdma_dev_exists "$NS2" "$RXE_NEW" &&
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! rdma_dev_exists "" "$RXE_A"; then
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ktap_test_pass "$TEST_MOVE_RENAME"
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else
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ktap_test_fail "$TEST_MOVE_RENAME"
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fi
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else
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ktap_test_fail "$TEST_MOVE_RENAME"
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fi
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cleanup_devs
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if ! rdma_supports_combined_move_rename; then
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ktap_test_skip "$TEST_COMBINED_MOVE_RENAME"
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elif ! setup_devs; then
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ktap_test_fail "$TEST_COMBINED_MOVE_RENAME"
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elif rdma dev set "$RXE_A" netns "$NS2" name "$RXE_NEW"; then
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if rdma_dev_exists "$NS2" "$RXE_NEW" &&
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! rdma_dev_exists "" "$RXE_A"; then
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ktap_test_pass "$TEST_COMBINED_MOVE_RENAME"
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else
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ktap_test_fail "$TEST_COMBINED_MOVE_RENAME"
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fi
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else
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ktap_test_fail "$TEST_COMBINED_MOVE_RENAME"
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fi
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cleanup_devs
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if ! setup_devs; then
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ktap_test_fail "$TEST_SAME_NETNS_DUP_RENAME"
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elif rdma dev set "$RXE_A" name "$RXE_SAME" &&
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rdma dev set "$RXE_B" name "$RXE_NEW"; then
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if rdma dev set "$RXE_SAME" name "$RXE_NEW" >/dev/null 2>&1; then
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ktap_test_fail "$TEST_SAME_NETNS_DUP_RENAME"
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elif rdma_dev_exists "" "$RXE_SAME" &&
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rdma_dev_exists "" "$RXE_NEW"; then
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ktap_test_pass "$TEST_SAME_NETNS_DUP_RENAME"
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else
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ktap_test_fail "$TEST_SAME_NETNS_DUP_RENAME"
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fi
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else
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ktap_test_fail "$TEST_SAME_NETNS_DUP_RENAME"
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fi
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cleanup_devs
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if ! setup_devs; then
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ktap_test_fail "$TEST_TEARDOWN_RETURN"
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elif ! rdma dev set "$RXE_A" name "$RXE_SAME" ||
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! rdma dev set "$RXE_B" netns "$NS2" ||
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! rdma_ns "$NS2" dev set "$RXE_B" name "$RXE_SAME" ||
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! rdma_dev_exists "$NS2" "$RXE_SAME"; then
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ktap_test_fail "$TEST_TEARDOWN_RETURN"
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else
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ip netns del "$NS2"
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returned=$(wait_rdma_dev_on_netdev "$DUMMY_B")
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ktap_print_msg "device returned to init_net as '${returned:-<missing>}'"
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if rdma_dev_exists "" "$RXE_SAME" &&
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[ -n "$returned" ] &&
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[ "$returned" != "$RXE_SAME" ] &&
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[ "${returned#ibdev}" != "$returned" ]; then
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ktap_test_pass "$TEST_TEARDOWN_RETURN"
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else
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ktap_test_fail "$TEST_TEARDOWN_RETURN"
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fi
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fi
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cleanup_devs
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ktap_finished
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