This commit introduces a new vmtest.sh runner for vsock.

It uses virtme-ng/qemu to run tests in a VM. The tests validate G2H, H2G, and loopback. The testing tools from tools/testing/vsock/ are reused. Currently, only vsock_test is used.

VMCI and hyperv support is automatically built, though not used.

Only tested on x86.

To run:

$ tools/testing/selftests/vsock/vmtest.sh

or

$ make -C tools/testing/selftests TARGETS=vsock run_tests

Output (vmtest.sh): TAP version 13 1..3 not ok 1 vm_server_host_client # exit=1 ok 1 vm_client_host_server ok 2 vm_loopback SUMMARY: PASS=2 SKIP=0 FAIL=1 1..3

Future work can include vsock_diag_test.

The tap output style copies mm's run_vmtests.sh.

Because vsock requires a VM to test anything other than loopback, this patch adds vmtest.sh as a kselftest itself. This is different than other systems that have a "vmtest.sh", where it is used as a utility script to spin up a VM to run the selftests as a guest (but isn't hooked into kselftest).

I've began testing this in one of the NIPA environments Jakub as graciously provided. I would expect at least one more revision to have that setup ironed out and fully tested.

Signed-off-by: Bobby Eshleman bobbyeshleman@gmail.com --- Changes in v4: - do not use special tab delimiter for help string parsing (Stefano + Paolo) - fix paths for when installing kselftest and running out-of-tree (Paolo) - change vng to using running kernel instead of compiled kernel (Paolo) - use multi-line string for QEMU_OPTS (Stefano) - change timeout to 300s (Paolo) - skip if tools are not found and use kselftests status codes (Paolo) - remove build from vmtest.sh (Paolo) - change 2222 -> SSH_HOST_PORT (Stefano) - add tap-format output - add vmtest.log to gitignore - check for vsock_test binary and remind user to build it if missing - create a proper build in makefile - style fixes - add ssh, timeout, and pkill to dependency check, just in case - fix numerical comparison in conditionals - check qemu pidfile exists before proceeding (avoid wasting time waiting for ssh) - fix tracking of pass/fail bug - fix stderr redirection bug - Link to v3: https://lore.kernel.org/r/20250428-vsock-vmtest-v3-1-181af6163f3e@gmail.com

Changes in v3: - use common conditional syntax for checking variables - use return value instead of global rc - fix typo TEST_HOST_LISTENER_PORT -> TEST_HOST_PORT_LISTENER - use SIGTERM instead of SIGKILL on cleanup - use peer-cid=1 for loopback - change sleep delay times into globals - fix test_vm_loopback logging - add test selection in arguments - make QEMU an argument - check that vng binary is on path - use QEMU variable - change <tab><backslash> to <space><backslash> - fix hardcoded file paths - add comment in commit msg about script that vmtest.sh was based off of - Add tools/testing/selftest/vsock/Makefile for kselftest - Link to v2: https://lore.kernel.org/r/20250417-vsock-vmtest-v2-1-3901a27331e8@gmail.com

Changes in v2: - add kernel oops and warnings checker - change testname variable to use FUNCNAME - fix spacing in test_vm_server_host_client - add -s skip build option to vmtest.sh - add test_vm_loopback - pass port to vm_wait_for_listener - fix indentation in vmtest.sh - add vmci and hyperv to config - changed whitespace from tabs to spaces in help string - Link to v1: https://lore.kernel.org/r/20250410-vsock-vmtest-v1-1-f35a81dab98c@gmail.com --- MAINTAINERS | 1 + tools/testing/selftests/vsock/.gitignore | 2 + tools/testing/selftests/vsock/Makefile | 17 ++ tools/testing/selftests/vsock/config | 114 +++++++++ tools/testing/selftests/vsock/settings | 1 + tools/testing/selftests/vsock/vmtest.sh | 423 +++++++++++++++++++++++++++++++ 6 files changed, 558 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS index 657a67f9031e..3fbdd7bbfce7 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -25751,6 +25751,7 @@ F: include/uapi/linux/vm_sockets.h F: include/uapi/linux/vm_sockets_diag.h F: include/uapi/linux/vsockmon.h F: net/vmw_vsock/ +F: tools/testing/selftests/vsock/ F: tools/testing/vsock/

VMALLOC diff --git a/tools/testing/selftests/vsock/.gitignore b/tools/testing/selftests/vsock/.gitignore new file mode 100644 index 000000000000..9c5bf379480f --- /dev/null +++ b/tools/testing/selftests/vsock/.gitignore @@ -0,0 +1,2 @@ +vmtest.log +vsock_test diff --git a/tools/testing/selftests/vsock/Makefile b/tools/testing/selftests/vsock/Makefile new file mode 100644 index 000000000000..71fca0a2b8da --- /dev/null +++ b/tools/testing/selftests/vsock/Makefile @@ -0,0 +1,17 @@ +# SPDX-License-Identifier: GPL-2.0 + +CURDIR := $(abspath .) +TOOLSDIR := $(abspath ../../..) + +$(OUTPUT)/vsock_test: $(TOOLSDIR)/testing/vsock/vsock_test + install -m 755 $< $@ + +$(TOOLSDIR)/testing/vsock/vsock_test: + $(MAKE) -C $(TOOLSDIR)/testing/vsock vsock_test + +TEST_PROGS += vmtest.sh +EXTRA_CLEAN += vmtest.log +TEST_GEN_FILES := vsock_test + +include ../lib.mk + diff --git a/tools/testing/selftests/vsock/config b/tools/testing/selftests/vsock/config new file mode 100644 index 000000000000..3bffaaf98fff --- /dev/null +++ b/tools/testing/selftests/vsock/config @@ -0,0 +1,114 @@ +CONFIG_BLK_DEV_INITRD=y +CONFIG_BPF=y +CONFIG_BPF_SYSCALL=y +CONFIG_BPF_JIT=y +CONFIG_HAVE_EBPF_JIT=y +CONFIG_BPF_EVENTS=y +CONFIG_FTRACE_SYSCALLS=y +CONFIG_FUNCTION_TRACER=y +CONFIG_HAVE_DYNAMIC_FTRACE=y +CONFIG_DYNAMIC_FTRACE=y +CONFIG_HAVE_KPROBES=y +CONFIG_KPROBES=y +CONFIG_KPROBE_EVENTS=y +CONFIG_ARCH_SUPPORTS_UPROBES=y +CONFIG_UPROBES=y +CONFIG_UPROBE_EVENTS=y +CONFIG_DEBUG_FS=y +CONFIG_FW_CFG_SYSFS=y +CONFIG_FW_CFG_SYSFS_CMDLINE=y +CONFIG_DRM=y +CONFIG_DRM_VIRTIO_GPU=y +CONFIG_DRM_VIRTIO_GPU_KMS=y +CONFIG_DRM_BOCHS=y +CONFIG_VIRTIO_IOMMU=y +CONFIG_SOUND=y +CONFIG_SND=y +CONFIG_SND_SEQUENCER=y +CONFIG_SND_PCI=y +CONFIG_SND_INTEL8X0=y +CONFIG_SND_HDA_CODEC_REALTEK=y +CONFIG_SECURITYFS=y +CONFIG_CGROUP_BPF=y +CONFIG_SQUASHFS=y +CONFIG_SQUASHFS_XZ=y +CONFIG_SQUASHFS_ZSTD=y +CONFIG_FUSE_FS=y +CONFIG_SERIO=y +CONFIG_PCI=y +CONFIG_INPUT=y +CONFIG_INPUT_KEYBOARD=y +CONFIG_KEYBOARD_ATKBD=y +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y +CONFIG_X86_VERBOSE_BOOTUP=y +CONFIG_VGA_CONSOLE=y +CONFIG_FB=y +CONFIG_FB_VESA=y +CONFIG_FRAMEBUFFER_CONSOLE=y +CONFIG_RTC_CLASS=y +CONFIG_RTC_HCTOSYS=y +CONFIG_RTC_DRV_CMOS=y +CONFIG_HYPERVISOR_GUEST=y +CONFIG_PARAVIRT=y +CONFIG_KVM_GUEST=y +CONFIG_KVM=y +CONFIG_KVM_INTEL=y +CONFIG_KVM_AMD=y +CONFIG_VSOCKETS=y +CONFIG_VSOCKETS_DIAG=y +CONFIG_VSOCKETS_LOOPBACK=y +CONFIG_VMWARE_VMCI_VSOCKETS=y +CONFIG_VIRTIO_VSOCKETS=y +CONFIG_VIRTIO_VSOCKETS_COMMON=y +CONFIG_HYPERV_VSOCKETS=y +CONFIG_VMWARE_VMCI=y +CONFIG_VHOST_VSOCK=y +CONFIG_HYPERV=y +CONFIG_UEVENT_HELPER=n +CONFIG_VIRTIO=y +CONFIG_VIRTIO_PCI=y +CONFIG_VIRTIO_MMIO=y +CONFIG_VIRTIO_BALLOON=y +CONFIG_NET=y +CONFIG_NET_CORE=y +CONFIG_NETDEVICES=y +CONFIG_NETWORK_FILESYSTEMS=y +CONFIG_INET=y +CONFIG_NET_9P=y +CONFIG_NET_9P_VIRTIO=y +CONFIG_9P_FS=y +CONFIG_VIRTIO_NET=y +CONFIG_CMDLINE_OVERRIDE=n +CONFIG_BINFMT_SCRIPT=y +CONFIG_SHMEM=y +CONFIG_TMPFS=y +CONFIG_UNIX=y +CONFIG_MODULE_SIG_FORCE=n +CONFIG_DEVTMPFS=y +CONFIG_TTY=y +CONFIG_VT=y +CONFIG_UNIX98_PTYS=y +CONFIG_EARLY_PRINTK=y +CONFIG_INOTIFY_USER=y +CONFIG_BLOCK=y +CONFIG_SCSI_LOWLEVEL=y +CONFIG_SCSI=y +CONFIG_SCSI_VIRTIO=y +CONFIG_BLK_DEV_SD=y +CONFIG_VIRTIO_CONSOLE=y +CONFIG_WATCHDOG=y +CONFIG_WATCHDOG_CORE=y +CONFIG_I6300ESB_WDT=y +CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y +CONFIG_OVERLAY_FS=y +CONFIG_DAX=y +CONFIG_DAX_DRIVER=y +CONFIG_FS_DAX=y +CONFIG_MEMORY_HOTPLUG=y +CONFIG_MEMORY_HOTREMOVE=y +CONFIG_ZONE_DEVICE=y +CONFIG_FUSE_FS=y +CONFIG_VIRTIO_FS=y +CONFIG_VSOCKETS=y +CONFIG_VIRTIO_VSOCKETS=y diff --git a/tools/testing/selftests/vsock/settings b/tools/testing/selftests/vsock/settings new file mode 100644 index 000000000000..694d70710ff0 --- /dev/null +++ b/tools/testing/selftests/vsock/settings @@ -0,0 +1 @@ +timeout=300 diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh new file mode 100755 index 000000000000..d7e727306175 --- /dev/null +++ b/tools/testing/selftests/vsock/vmtest.sh @@ -0,0 +1,423 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (c) 2025 Meta Platforms, Inc. and affiliates +# +# Dependencies: +# * virtme-ng +# * busybox-static (used by virtme-ng) +# * qemu (used by virtme-ng) + +TAP_PREFIX="# " +VERBOSE=0 +KSFT_PASS=0 +KSFT_FAIL=1 +KSFT_SKIP=4 +SCRIPT_DIR="$(cd -P -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)" +VSOCK_TEST=${SCRIPT_DIR}/vsock_test + +TEST_GUEST_PORT=51000 +TEST_HOST_PORT=50000 +TEST_HOST_PORT_LISTENER=50001 +SSH_GUEST_PORT=22 +SSH_HOST_PORT=2222 +VSOCK_CID=1234 +WAIT_PERIOD=3 +WAIT_PERIOD_MAX=20 +WAIT_TOTAL=$(( WAIT_PERIOD * WAIT_PERIOD_MAX )) + +QEMU_PIDFILE=/tmp/qemu.pid + +# virtme-ng offers a netdev for ssh when using "--ssh", but we also need a +# control port forwarded for vsock_test. Because virtme-ng doesn't support +# adding an additional port to forward to the device created from "--ssh" and +# virtme-init mistakenly sets identical IPs to the ssh device and additional +# devices, we instead opt out of using --ssh, add the device manually, and also +# add the kernel cmdline options that virtme-init uses to setup the interface. +QEMU_TEST_PORT_FWD="hostfwd=tcp::${TEST_HOST_PORT}-:${TEST_GUEST_PORT}" +QEMU_SSH_PORT_FWD="hostfwd=tcp::${SSH_HOST_PORT}-:${SSH_GUEST_PORT}" +QEMU_OPTS="\ + -netdev user,id=n0,${QEMU_TEST_PORT_FWD},${QEMU_SSH_PORT_FWD} \ + -device virtio-net-pci,netdev=n0 \ + -device vhost-vsock-pci,guest-cid=${VSOCK_CID} \ + --pidfile ${QEMU_PIDFILE} \ +" +KERNEL_CMDLINE="virtme.dhcp net.ifnames=0 biosdevname=0 virtme.ssh virtme_ssh_user=$USER" + +LOG=${SCRIPT_DIR}/vmtest.log + +TEST_NAMES=(vm_server_host_client vm_client_host_server vm_loopback) +TEST_DESCS=( + "Run vsock_test in server mode on the VM and in client mode on the host." + "Run vsock_test in client mode on the VM and in server mode on the host." + "Run vsock_test using the loopback transport in the VM." +) + +usage() { + local name + local desc + local i + echo + echo "$0 [OPTIONS] [TEST]..." + echo "If no TEST argument is given, all tests will be run." + echo + echo "Options" + echo " -v: verbose output" + echo + echo "Available tests" + + for ((i = 0; i < ${#TEST_NAMES[@]}; i++)); do + name=${TEST_NAMES[${i}]} + desc=${TEST_DESCS[${i}]} + printf "\t%-35s%-35s\n" "${name}" "${desc}" + done + echo + + exit 1 +} + +die() { + echo "$*" >&2 + exit ${KSFT_FAIL} +} + +vm_ssh() { + ssh -q -o UserKnownHostsFile=/dev/null -p ${SSH_HOST_PORT} localhost $* + return $? +} + +cleanup() { + if [[ -f "${QEMU_PIDFILE}" ]]; then + pkill -SIGTERM -F ${QEMU_PIDFILE} 2>&1 > /dev/null + fi +} + +check_args() { + local found + + for arg in "$@"; do + found=0 + for name in "${TEST_NAMES[@]}"; do + if [[ "${name}" = "${arg}" ]]; then + found=1 + break + fi + done + + if [[ "${found}" -eq 0 ]]; then + echo "${arg} is not an available test" >&2 + usage + fi + done + + for arg in "$@"; do + if ! command -v > /dev/null "test_${arg}"; then + echo "Test ${arg} not found" >&2 + usage + fi + done +} + +check_deps() { + for dep in vng ${QEMU} busybox timeout pkill ssh; do + if [[ ! -x "$(command -v ${dep})" ]]; then + echo -e "skip: dependency ${dep} not found!\n" + exit ${KSFT_SKIP} + fi + done + + if [[ ! -x $(command -v ${VSOCK_TEST}) ]]; then + printf "skip: ${VSOCK_TEST} not found!" + printf " Please build the kselftest vsock target.\n" + exit ${KSFT_SKIP} + fi +} + +vm_setup() { + local VNG_OPTS="" + local logfile=/dev/null + + if [[ "${VERBOSE}" = 1 ]]; then + VNG_OPTS="--verbose" + logfile=/dev/stdout + fi + vng \ + $VNG_OPTS \ + --run \ + --qemu-opts="${QEMU_OPTS}" \ + --qemu="${QEMU}" \ + --user root \ + --append "${KERNEL_CMDLINE}" \ + --rw &> ${logfile} & + + timeout ${WAIT_TOTAL} \ + bash -c 'while [[ ! -e '"${QEMU_PIDFILE}"' ]]; do sleep 1; done; exit 0' + if [[ ! $? -eq 0 ]]; then + die "failed to boot VM" + fi +} + +vm_wait_for_ssh() { + i=0 + while [[ true ]]; do + if [[ ${i} -gt ${WAIT_PERIOD_MAX} ]]; then + die "Timed out waiting for guest ssh" + fi + vm_ssh -- true + if [[ $? -eq 0 ]]; then + break + fi + i=$(( i + 1 )) + sleep ${WAIT_PERIOD} + done +} + +wait_for_listener() { + local port=$1 + local interval=$2 + local max_intervals=$3 + local i=0 + while ! ss -ltn | grep -q ":${port}"; do + if [[ ${i} -gt ${max_intervals} ]]; then + die "Timed out waiting for listener on port ${port}" + fi + i=$(( i + 1 )) + sleep ${interval} + done +} + +vm_wait_for_listener() { + local port=$1 + vm_ssh <<EOF +$(declare -f wait_for_listener) +wait_for_listener ${port} ${WAIT_PERIOD} ${WAIT_PERIOD_MAX} +EOF +} + +host_wait_for_listener() { + wait_for_listener ${TEST_HOST_PORT_LISTENER} ${WAIT_PERIOD} ${WAIT_PERIOD_MAX} +} + +__log_stdin() { + cat | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }' +} + +__log_args() { + echo "$*" | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }' +} + +log() { + local prefix="$1" + shift + + local redirect= + if [[ ${VERBOSE} -eq 0 ]]; then + redirect=/dev/null + else + redirect=/dev/stdout + fi + + if [[ "$#" -eq 0 ]]; then + __log_stdin | tee -a ${LOG} > ${redirect} + else + __log_args | tee -a ${LOG} > ${redirect} + fi +} + +log_setup() { + log "setup" "$@" +} + +log_host() { + testname=$1 + shift + log "test:${testname}:host" "$@" +} + +log_guest() { + testname=$1 + shift + log "test:${testname}:guest" "$@" +} + +tap_prefix() { + sed -e "s/^/${TAP_PREFIX}/" +} + +tap_output() { + if [[ ! -z "$TAP_PREFIX" ]]; then + read str + echo $str + fi +} + +test_vm_server_host_client() { + local testname="${FUNCNAME[0]#test_}" + + vm_ssh -- "${VSOCK_TEST}" \ + --mode=server \ + --control-port="${TEST_GUEST_PORT}" \ + --peer-cid=2 \ + 2>&1 | log_guest "${testname}" & + + vm_wait_for_listener ${TEST_GUEST_PORT} + + ${VSOCK_TEST} \ + --mode=client \ + --control-host=127.0.0.1 \ + --peer-cid="${VSOCK_CID}" \ + --control-port="${TEST_HOST_PORT}" 2>&1 | log_host "${testname}" + + return $? +} + +test_vm_client_host_server() { + local testname="${FUNCNAME[0]#test_}" + + ${VSOCK_TEST} \ + --mode "server" \ + --control-port "${TEST_HOST_PORT_LISTENER}" \ + --peer-cid "${VSOCK_CID}" 2>&1 | log_host "${testname}" & + + host_wait_for_listener + + vm_ssh -- "${VSOCK_TEST}" \ + --mode=client \ + --control-host=10.0.2.2 \ + --peer-cid=2 \ + --control-port="${TEST_HOST_PORT_LISTENER}" 2>&1 | log_guest "${testname}" + + return $? +} + +test_vm_loopback() { + local testname="${FUNCNAME[0]#test_}" + local port=60000 # non-forwarded local port + + vm_ssh -- ${VSOCK_TEST} \ + --mode=server \ + --control-port="${port}" \ + --peer-cid=1 2>&1 | log_guest "${testname}" & + + vm_wait_for_listener ${port} + + vm_ssh -- ${VSOCK_TEST} \ + --mode=client \ + --control-host="127.0.0.1" \ + --control-port="${port}" \ + --peer-cid=1 2>&1 | log_guest "${testname}" + + return $? +} + +run_test() { + unset IFS + local host_oops_cnt_before + local host_warn_cnt_before + local vm_oops_cnt_before + local vm_warn_cnt_before + local host_oops_cnt_after + local host_warn_cnt_after + local vm_oops_cnt_after + local vm_warn_cnt_after + local name + local rc + + host_oops_cnt_before=$(dmesg | grep -c -i 'Oops') + host_warn_cnt_before=$(dmesg --level=warn | wc -l) + vm_oops_cnt_before=$(vm_ssh -- dmesg | grep -c -i 'Oops') + vm_warn_cnt_before=$(vm_ssh -- dmesg --level=warn | wc -l) + + name=$(echo "${1}" | awk '{ print $1 }') + eval test_"${name}" + rc=$? + + host_oops_cnt_after=$(dmesg | grep -i 'Oops' | wc -l) + if [[ ${host_oops_cnt_after} -gt ${host_oops_cnt_before} ]]; then + echo "${name}: kernel oops detected on host" | log_host ${name} + rc=$KSFT_FAIL + fi + + host_warn_cnt_after=$(dmesg --level=warn | wc -l) + if [[ ${host_warn_cnt_after} -gt ${host_warn_cnt_before} ]]; then + echo "${name}: kernel warning detected on host" | log_host ${name} + rc=$KSFT_FAIL + fi + + vm_oops_cnt_after=$(vm_ssh -- dmesg | grep -i 'Oops' | wc -l) + if [[ ${vm_oops_cnt_after} -gt ${vm_oops_cnt_before} ]]; then + echo "${name}: kernel oops detected on vm" | log_host ${name} + rc=$KSFT_FAIL + fi + + vm_warn_cnt_after=$(vm_ssh -- dmesg --level=warn | wc -l) + if [[ ${vm_warn_cnt_after} -gt ${vm_warn_cnt_before} ]]; then + echo "${name}: kernel warning detected on vm" | log_host ${name} + rc=$KSFT_FAIL + fi + + return ${rc} +} + +while getopts :hvsq: o +do + case $o in + v) VERBOSE=1;; + q) QEMU=$OPTARG;; + h|*) usage;; + esac +done +shift $((OPTIND-1)) + +trap cleanup EXIT + +if [[ ${#} -eq 0 ]]; then + ARGS=(${TEST_NAMES[@]}) +else + ARGS=($@) +fi + +check_args "${ARGS[@]}" +check_deps + +QEMU=$(command -v ${QEMU:-qemu-system-$(uname -m)}) + +echo "TAP version 13" | tap_output +echo "1..${#ARGS[@]}" | tap_output + +rm -f "${LOG}" +log_setup "Booting up VM" +vm_setup +vm_wait_for_ssh +log_setup "VM booted up" + +cnt_pass=0 +cnt_fail=0 +cnt_skip=0 +cnt_total=0 +exitcode=0 +for arg in "${ARGS[@]}"; do + run_test "${arg}" + rc=$? + if [[ ${rc} == $KSFT_PASS ]]; then + cnt_pass=$(( cnt_pass + 1 )) + echo "[PASS]" | tap_prefix + echo "ok ${cnt_total} ${arg}" | tap_output + elif [[ ${rc} == $KSFT_SKIP ]]; then + cnt_skip=$(( cnt_skip + 1 )) + echo "[SKIP]" | tap_prefix + echo "ok ${cnt_total} ${arg} # SKIP" | tap_output + exitcode=$KSFT_SKIP + elif [[ ${rc} == $KSFT_FAIL ]]; then + cnt_fail=$(( cnt_fail + 1 )) + echo "[FAIL]" | tap_prefix + echo "not ok ${cnt_fail} ${arg} # exit=$rc" | tap_output + exitcode=$KSFT_FAIL + fi + cnt_total=$(( cnt_total + 1 )) +done + +echo "SUMMARY: PASS=${cnt_pass} SKIP=${cnt_skip} FAIL=${cnt_fail}" | tap_prefix +echo "1..${cnt_total}" | tap_output + +exit ${rc}

--- base-commit: 8066e388be48f1ad62b0449dc1d31a25489fa12a change-id: 20250325-vsock-vmtest-b3a21d2102c2

Best regards,