Hey all,
This patch series refactors the vsock selftest VM infrastructure to improve test run times, improve logging, and prepare for future tests which make heavy usage of these refactored functions and have new requirements such as simultaneous QEMU processes.
These patches were broken off from this prior series: https://lore.kernel.org/all/20251021-vsock-vmtest-v7-0-0661b7b6f081@meta.com...
To: Stefano Garzarella sgarzare@redhat.com To: Shuah Khan shuah@kernel.org Cc: virtualization@lists.linux.dev Cc: netdev@vger.kernel.org Cc: linux-kselftest@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Simon Horman horms@kernel.org
Changes in v4: - fix messed up rebase (wrt check_result() and shared_vm_test() patches) - more consistent variable quotes style - use associative array for pidfiles, remove after terminate - Link to v3: https://lore.kernel.org/r/20251106-vsock-selftests-fixes-and-improvements-v3...
Changes in v3: - see per-patch changes - Link to v2: https://lore.kernel.org/all/20251104-vsock-selftests-fixes-and-improvements-...
Changes in v2: - remove "Fixes" for some patches because they do not fix bugs in kselftest runs (some fix bugs only when using bash args that kselftest does not use or otherwise prepare functions for new usage) - broke out one fixes patch for "net" - per-patch changes - add patch for shellcheck declaration to disable false positives - Link to v1: https://lore.kernel.org/r/20251022-vsock-selftests-fixes-and-improvements-v1...
--- Bobby Eshleman (12): selftests/vsock: improve logging in vmtest.sh selftests/vsock: make wait_for_listener() work even if pipefail is on selftests/vsock: reuse logic for vsock_test through wrapper functions selftests/vsock: avoid multi-VM pidfile collisions with QEMU selftests/vsock: do not unconditionally die if qemu fails selftests/vsock: speed up tests by reducing the QEMU pidfile timeout selftests/vsock: add check_result() for pass/fail counting selftests/vsock: identify and execute tests that can re-use VM selftests/vsock: add BUILD=0 definition selftests/vsock: add 1.37 to tested virtme-ng versions selftests/vsock: add vsock_loopback module loading selftests/vsock: disable shellcheck SC2317 and SC2119
tools/testing/selftests/vsock/vmtest.sh | 346 +++++++++++++++++++++----------- 1 file changed, 233 insertions(+), 113 deletions(-) --- base-commit: a0c3aefb08cd81864b17c23c25b388dba90b9dad change-id: 20251021-vsock-selftests-fixes-and-improvements-057440ffb2fa
Best regards,
From: Bobby Eshleman bobbyeshleman@meta.com
Improve usability of logging functions. Remove the test name prefix from logging functions so that logging calls can be made deeper into the call stack without passing down the test name or setting some global. Teach log function to accept a LOG_PREFIX variable to avoid unnecessary argument shifting.
Remove log_setup() and instead use log_host(). The host/guest prefixes are useful to show whether a failure happened on the guest or host side, but "setup" doesn't really give additional useful information. Since all log_setup() calls happen on the host, lets just use log_host() instead.
Signed-off-by: Bobby Eshleman bobbyeshleman@meta.com --- Changes in v4: - add quotes to "${redirect}" for consistency
Changes in v2: - add quotes around $@ in log_{host,guest} (Simon) - remove unnecessary cat for piping into awk (Simon)
Changes from previous series: - do not use log levels, keep as on/off switch, after revising the other patch series the levels became unnecessary. --- tools/testing/selftests/vsock/vmtest.sh | 69 ++++++++++++++------------------- 1 file changed, 29 insertions(+), 40 deletions(-)
diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh index 8ceeb8a7894f..bc16b13cdbe3 100755 --- a/tools/testing/selftests/vsock/vmtest.sh +++ b/tools/testing/selftests/vsock/vmtest.sh @@ -271,60 +271,51 @@ EOF
host_wait_for_listener() { wait_for_listener "${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" + local redirect + local prefix
- shift - local redirect= if [[ ${VERBOSE} -eq 0 ]]; then redirect=/dev/null else redirect=/dev/stdout fi
+ prefix="${LOG_PREFIX:-}" + if [[ "$#" -eq 0 ]]; then - __log_stdin | tee -a "${LOG}" > ${redirect} + if [[ -n "${prefix}" ]]; then + awk -v prefix="${prefix}" '{printf "%s: %s\n", prefix, $0}' + else + cat + fi else - __log_args "$@" | tee -a "${LOG}" > ${redirect} - fi -} - -log_setup() { - log "setup" "$@" + if [[ -n "${prefix}" ]]; then + echo "${prefix}: " "$@" + else + echo "$@" + fi + fi | tee -a "${LOG}" > "${redirect}" }
log_host() { - local testname=$1 - - shift - log "test:${testname}:host" "$@" + LOG_PREFIX=host log "$@" }
log_guest() { - local testname=$1 - - shift - log "test:${testname}:guest" "$@" + LOG_PREFIX=guest log "$@" }
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}" & + 2>&1 | log_guest &
vm_wait_for_listener "${TEST_GUEST_PORT}"
@@ -332,18 +323,17 @@ test_vm_server_host_client() { --mode=client \ --control-host=127.0.0.1 \ --peer-cid="${VSOCK_CID}" \ - --control-port="${TEST_HOST_PORT}" 2>&1 | log_host "${testname}" + --control-port="${TEST_HOST_PORT}" 2>&1 | log_host
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}" & + --peer-cid "${VSOCK_CID}" 2>&1 | log_host &
host_wait_for_listener
@@ -351,19 +341,18 @@ test_vm_client_host_server() { --mode=client \ --control-host=10.0.2.2 \ --peer-cid=2 \ - --control-port="${TEST_HOST_PORT_LISTENER}" 2>&1 | log_guest "${testname}" + --control-port="${TEST_HOST_PORT_LISTENER}" 2>&1 | log_guest
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 "${testname}" & + --peer-cid=1 2>&1 | log_guest &
vm_wait_for_listener "${port}"
@@ -371,7 +360,7 @@ test_vm_loopback() { --mode=client \ --control-host="127.0.0.1" \ --control-port="${port}" \ - --peer-cid=1 2>&1 | log_guest "${testname}" + --peer-cid=1 2>&1 | log_guest
return $? } @@ -399,25 +388,25 @@ run_test() {
host_oops_cnt_after=$(dmesg | grep -i 'Oops' | wc -l) if [[ ${host_oops_cnt_after} -gt ${host_oops_cnt_before} ]]; then - echo "FAIL: kernel oops detected on host" | log_host "${name}" + echo "FAIL: kernel oops detected on host" | log_host rc=$KSFT_FAIL fi
host_warn_cnt_after=$(dmesg --level=warn | grep -c -i 'vsock') if [[ ${host_warn_cnt_after} -gt ${host_warn_cnt_before} ]]; then - echo "FAIL: kernel warning detected on host" | log_host "${name}" + echo "FAIL: kernel warning detected on host" | log_host rc=$KSFT_FAIL fi
vm_oops_cnt_after=$(vm_ssh -- dmesg | grep -i 'Oops' | wc -l) if [[ ${vm_oops_cnt_after} -gt ${vm_oops_cnt_before} ]]; then - echo "FAIL: kernel oops detected on vm" | log_host "${name}" + echo "FAIL: kernel oops detected on vm" | log_host rc=$KSFT_FAIL fi
vm_warn_cnt_after=$(vm_ssh -- dmesg --level=warn | grep -c -i 'vsock') if [[ ${vm_warn_cnt_after} -gt ${vm_warn_cnt_before} ]]; then - echo "FAIL: kernel warning detected on vm" | log_host "${name}" + echo "FAIL: kernel warning detected on vm" | log_host rc=$KSFT_FAIL fi
@@ -452,10 +441,10 @@ handle_build
echo "1..${#ARGS[@]}"
-log_setup "Booting up VM" +log_host "Booting up VM" vm_start vm_wait_for_ssh -log_setup "VM booted up" +log_host "VM booted up"
cnt_pass=0 cnt_fail=0
From: Bobby Eshleman bobbyeshleman@meta.com
Rewrite wait_for_listener()'s pattern matching to avoid tripping the if-condition when pipefail is on.
awk doesn't gracefully handle SIGPIPE with a non-zero exit code, so grep exiting upon finding a match causes false-positives when the pipefail option is used (grep exits, SIGPIPE emits, and awk complains with a non-zero exit code). Instead, move all of the pattern matching into awk so that SIGPIPE cannot happen and the correct exit code is returned.
Signed-off-by: Bobby Eshleman bobbyeshleman@meta.com --- Changes in v2: - use awk-only tcp port lookup - remove fixes tag because this problem is only introduced when a later patch enables pipefail for other reasons (not yet in tree) --- tools/testing/selftests/vsock/vmtest.sh | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh index bc16b13cdbe3..01ce16523afb 100755 --- a/tools/testing/selftests/vsock/vmtest.sh +++ b/tools/testing/selftests/vsock/vmtest.sh @@ -251,9 +251,11 @@ wait_for_listener()
# for tcp protocol additionally check the socket state [ "${protocol}" = "tcp" ] && pattern="${pattern}0A" + for i in $(seq "${max_intervals}"); do - if awk '{print $2" "$4}' /proc/net/"${protocol}"* | \ - grep -q "${pattern}"; then + if awk -v pattern="${pattern}" \ + 'BEGIN {rc=1} $2" "$4 ~ pattern {rc=0} END {exit rc}' \ + /proc/net/"${protocol}"*; then break fi sleep "${interval}"
From: Bobby Eshleman bobbyeshleman@meta.com
Add wrapper functions vm_vsock_test() and host_vsock_test() to invoke the vsock_test binary. This encapsulates several items of repeat logic, such as waiting for the server to reach listening state and enabling/disabling the bash option pipefail to avoid pipe-style logging from hiding failures.
Signed-off-by: Bobby Eshleman bobbyeshleman@meta.com --- Changes in v4: - remember to disable pipefail before returning from host_vsock_test()
Changes in v3: - Add port input parameter to host_wait_for_listener() to accept port from host_vsock_test() (Stefano) - Change host_wait_for_listener() call-site to pass in parameter --- tools/testing/selftests/vsock/vmtest.sh | 135 ++++++++++++++++++++++---------- 1 file changed, 95 insertions(+), 40 deletions(-)
diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh index 01ce16523afb..3bccd9b84e4a 100755 --- a/tools/testing/selftests/vsock/vmtest.sh +++ b/tools/testing/selftests/vsock/vmtest.sh @@ -272,8 +272,81 @@ EOF }
host_wait_for_listener() { - wait_for_listener "${TEST_HOST_PORT_LISTENER}" "${WAIT_PERIOD}" "${WAIT_PERIOD_MAX}" + local port=$1
+ wait_for_listener "${port}" "${WAIT_PERIOD}" "${WAIT_PERIOD_MAX}" +} + +vm_vsock_test() { + local host=$1 + local cid=$2 + local port=$3 + local rc + + # log output and use pipefail to respect vsock_test errors + set -o pipefail + if [[ "${host}" != server ]]; then + vm_ssh -- "${VSOCK_TEST}" \ + --mode=client \ + --control-host="${host}" \ + --peer-cid="${cid}" \ + --control-port="${port}" \ + 2>&1 | log_guest + rc=$? + else + vm_ssh -- "${VSOCK_TEST}" \ + --mode=server \ + --peer-cid="${cid}" \ + --control-port="${port}" \ + 2>&1 | log_guest & + rc=$? + + if [[ $rc -ne 0 ]]; then + set +o pipefail + return $rc + fi + + vm_wait_for_listener "${port}" + rc=$? + fi + set +o pipefail + + return $rc +} + +host_vsock_test() { + local host=$1 + local cid=$2 + local port=$3 + local rc + + # log output and use pipefail to respect vsock_test errors + set -o pipefail + if [[ "${host}" != server ]]; then + ${VSOCK_TEST} \ + --mode=client \ + --peer-cid="${cid}" \ + --control-host="${host}" \ + --control-port="${port}" 2>&1 | log_host + rc=$? + else + ${VSOCK_TEST} \ + --mode=server \ + --peer-cid="${cid}" \ + --control-port="${port}" 2>&1 | log_host & + rc=$? + + if [[ $rc -ne 0 ]]; then + set +o pipefail + return $rc + fi + + host_wait_for_listener "${port}" + rc=$? + fi + set +o pipefail + + return $rc }
log() { @@ -312,59 +385,41 @@ log_guest() { }
test_vm_server_host_client() { + if ! vm_vsock_test "server" 2 "${TEST_GUEST_PORT}"; then + return "${KSFT_FAIL}" + fi
- vm_ssh -- "${VSOCK_TEST}" \ - --mode=server \ - --control-port="${TEST_GUEST_PORT}" \ - --peer-cid=2 \ - 2>&1 | log_guest & - - vm_wait_for_listener "${TEST_GUEST_PORT}" - - ${VSOCK_TEST} \ - --mode=client \ - --control-host=127.0.0.1 \ - --peer-cid="${VSOCK_CID}" \ - --control-port="${TEST_HOST_PORT}" 2>&1 | log_host + if ! host_vsock_test "127.0.0.1" "${VSOCK_CID}" "${TEST_HOST_PORT}"; then + return "${KSFT_FAIL}" + fi
- return $? + return "${KSFT_PASS}" }
test_vm_client_host_server() { + if ! host_vsock_test "server" "${VSOCK_CID}" "${TEST_HOST_PORT_LISTENER}"; then + return "${KSFT_FAIL}" + fi
- ${VSOCK_TEST} \ - --mode "server" \ - --control-port "${TEST_HOST_PORT_LISTENER}" \ - --peer-cid "${VSOCK_CID}" 2>&1 | log_host & - - host_wait_for_listener - - vm_ssh -- "${VSOCK_TEST}" \ - --mode=client \ - --control-host=10.0.2.2 \ - --peer-cid=2 \ - --control-port="${TEST_HOST_PORT_LISTENER}" 2>&1 | log_guest + if ! vm_vsock_test "10.0.2.2" 2 "${TEST_HOST_PORT_LISTENER}"; then + return "${KSFT_FAIL}" + fi
- return $? + return "${KSFT_PASS}" }
test_vm_loopback() { local port=60000 # non-forwarded local port
- vm_ssh -- "${VSOCK_TEST}" \ - --mode=server \ - --control-port="${port}" \ - --peer-cid=1 2>&1 | log_guest & - - vm_wait_for_listener "${port}" + if ! vm_vsock_test "server" 1 "${port}"; then + return "${KSFT_FAIL}" + fi
- vm_ssh -- "${VSOCK_TEST}" \ - --mode=client \ - --control-host="127.0.0.1" \ - --control-port="${port}" \ - --peer-cid=1 2>&1 | log_guest + if ! vm_vsock_test "127.0.0.1" 1 "${port}"; then + return "${KSFT_FAIL}" + fi
- return $? + return "${KSFT_PASS}" }
run_test() {
From: Bobby Eshleman bobbyeshleman@meta.com
Change QEMU to use generated pidfile names instead of just a single globally-defined pidfile. This allows multiple QEMU instances to co-exist with different pidfiles. This is required for future tests that use multiple VMs to check for CID collissions.
Additionally, this also places the burden of killing the QEMU process and cleaning up the pidfile on the caller of vm_start(). To help with this, a function terminate_pidfiles() is introduced that callers use to perform the cleanup. The terminate_pidfiles() function supports multiple pidfile removals because future patches will need to process two pidfiles at a time.
Change QEMU_OPTS to be initialized inside the vm_start(). This allows the generated pidfile to be passed to the string assignment, and prepares for future vm-specific options as well (e.g., cid).
Signed-off-by: Bobby Eshleman bobbyeshleman@meta.com --- Changes in v4: - use terminate_pidfiles() in cleanup (Simon) - use associative array for PIDFILES and remove pidfiles as they are terminated (Simon)
Changes in v3: - do not add unneeded -u to mktemp (Stefano) - quote $PIDFILE_TEMPLATE (Stefano) - do not remove cleanup(). Though it is expected that vm_start() does not exit(2) and its caller is responsible for pidfile cleanup, retaining cleanup() on EXIT is worth keeping as ill-timed kill signals (i.e., during manual runs) may leak those files. - add create_pidfile() function to generate pidfile and automatically add it to array for cleanup() to terminate and remove later.
Changes in v2: - mention QEMU_OPTS changes in commit message (Simon) --- tools/testing/selftests/vsock/vmtest.sh | 62 +++++++++++++++++++++++---------- 1 file changed, 43 insertions(+), 19 deletions(-)
diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh index 3bccd9b84e4a..13b685280a67 100755 --- a/tools/testing/selftests/vsock/vmtest.sh +++ b/tools/testing/selftests/vsock/vmtest.sh @@ -23,7 +23,8 @@ readonly VSOCK_CID=1234 readonly WAIT_PERIOD=3 readonly WAIT_PERIOD_MAX=60 readonly WAIT_TOTAL=$(( WAIT_PERIOD * WAIT_PERIOD_MAX )) -readonly QEMU_PIDFILE=$(mktemp /tmp/qemu_vsock_vmtest_XXXX.pid) +readonly PIDFILE_TEMPLATE=/tmp/vsock_vmtest_XXXX.pid +declare -A PIDFILES
# virtme-ng offers a netdev for ssh when using "--ssh", but we also need a # control port forwarded for vsock_test. Because virtme-ng doesn't support @@ -33,12 +34,6 @@ readonly QEMU_PIDFILE=$(mktemp /tmp/qemu_vsock_vmtest_XXXX.pid) # add the kernel cmdline options that virtme-init uses to setup the interface. readonly QEMU_TEST_PORT_FWD="hostfwd=tcp::${TEST_HOST_PORT}-:${TEST_GUEST_PORT}" readonly QEMU_SSH_PORT_FWD="hostfwd=tcp::${SSH_HOST_PORT}-:${SSH_GUEST_PORT}" -readonly 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 ${QEMU_PIDFILE} \ -" readonly KERNEL_CMDLINE="\ virtme.dhcp net.ifnames=0 biosdevname=0 \ virtme.ssh virtme_ssh_channel=tcp virtme_ssh_user=$USER \ @@ -90,15 +85,7 @@ vm_ssh() { }
cleanup() { - if [[ -s "${QEMU_PIDFILE}" ]]; then - pkill -SIGTERM -F "${QEMU_PIDFILE}" > /dev/null 2>&1 - fi - - # If failure occurred during or before qemu start up, then we need - # to clean this up ourselves. - if [[ -e "${QEMU_PIDFILE}" ]]; then - rm "${QEMU_PIDFILE}" - fi + terminate_pidfiles "${!PIDFILES[@]}" }
check_args() { @@ -188,10 +175,37 @@ handle_build() { popd &>/dev/null }
+create_pidfile() { + local pidfile + + pidfile=$(mktemp "${PIDFILE_TEMPLATE}") + PIDFILES["${pidfile}"]=1 + + echo "${pidfile}" +} + +terminate_pidfiles() { + local pidfile + + for pidfile in "$@"; do + if [[ -s "${pidfile}" ]]; then + pkill -SIGTERM -F "${pidfile}" > /dev/null 2>&1 + fi + + if [[ -e "${pidfile}" ]]; then + rm -f "${pidfile}" + fi + + unset "PIDFILES[${pidfile}]" + done +} + vm_start() { + local pidfile=$1 local logfile=/dev/null local verbose_opt="" local kernel_opt="" + local qemu_opts="" local qemu
qemu=$(command -v "${QEMU}") @@ -201,6 +215,13 @@ vm_start() { logfile=/dev/stdout fi
+ qemu_opts="\ + -netdev user,id=n0,${QEMU_TEST_PORT_FWD},${QEMU_SSH_PORT_FWD} \ + -device virtio-net-pci,netdev=n0 \ + -device vhost-vsock-pci,guest-cid=${VSOCK_CID} \ + --pidfile ${pidfile} + " + if [[ "${BUILD}" -eq 1 ]]; then kernel_opt="${KERNEL_CHECKOUT}" fi @@ -209,14 +230,14 @@ vm_start() { --run \ ${kernel_opt} \ ${verbose_opt} \ - --qemu-opts="${QEMU_OPTS}" \ + --qemu-opts="${qemu_opts}" \ --qemu="${qemu}" \ --user root \ --append "${KERNEL_CMDLINE}" \ --rw &> ${logfile} &
if ! timeout ${WAIT_TOTAL} \ - bash -c 'while [[ ! -s '"${QEMU_PIDFILE}"' ]]; do sleep 1; done; exit 0'; then + bash -c 'while [[ ! -s '"${pidfile}"' ]]; do sleep 1; done; exit 0'; then die "failed to boot VM" fi } @@ -499,7 +520,8 @@ handle_build echo "1..${#ARGS[@]}"
log_host "Booting up VM" -vm_start +pidfile="$(create_pidfile)" +vm_start "${pidfile}" vm_wait_for_ssh log_host "VM booted up"
@@ -523,6 +545,8 @@ for arg in "${ARGS[@]}"; do cnt_total=$(( cnt_total + 1 )) done
+terminate_pidfiles "${pidfile}" + echo "SUMMARY: PASS=${cnt_pass} SKIP=${cnt_skip} FAIL=${cnt_fail}" echo "Log: ${LOG}"
From: Bobby Eshleman bobbyeshleman@meta.com
If QEMU fails to boot, then set the returncode (via timeout) instead of unconditionally dying. This is in preparation for tests that expect QEMU to fail to boot. In that case, we just want to know if the boot failed or not so we can test the pass/fail criteria, and continue executing the next test.
Reviewed-by: Simon Horman horms@kernel.org Signed-off-by: Bobby Eshleman bobbyeshleman@meta.com --- tools/testing/selftests/vsock/vmtest.sh | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh index 13b685280a67..6889bdb8a31c 100755 --- a/tools/testing/selftests/vsock/vmtest.sh +++ b/tools/testing/selftests/vsock/vmtest.sh @@ -236,10 +236,8 @@ vm_start() { --append "${KERNEL_CMDLINE}" \ --rw &> ${logfile} &
- if ! timeout ${WAIT_TOTAL} \ - bash -c 'while [[ ! -s '"${pidfile}"' ]]; do sleep 1; done; exit 0'; then - die "failed to boot VM" - fi + timeout "${WAIT_TOTAL}" \ + bash -c 'while [[ ! -s '"${pidfile}"' ]]; do sleep 1; done; exit 0' }
vm_wait_for_ssh() {
From: Bobby Eshleman bobbyeshleman@meta.com
Reduce the time waiting for the QEMU pidfile from three minutes to five seconds. The three minute time window was chosen to make sure QEMU had enough time to fully boot up. This, however, is an unreasonably long delay for QEMU to write the pidfile, which happens earlier when the QEMU process starts (not after VM boot). The three minute delay becomes noticeably wasteful in future tests that expect QEMU to fail and wait a full three minutes for a pidfile that will never exist.
Reviewed-by: Simon Horman horms@kernel.org Signed-off-by: Bobby Eshleman bobbyeshleman@meta.com --- tools/testing/selftests/vsock/vmtest.sh | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh index 6889bdb8a31c..bd231467c66b 100755 --- a/tools/testing/selftests/vsock/vmtest.sh +++ b/tools/testing/selftests/vsock/vmtest.sh @@ -22,7 +22,7 @@ readonly SSH_HOST_PORT=2222 readonly VSOCK_CID=1234 readonly WAIT_PERIOD=3 readonly WAIT_PERIOD_MAX=60 -readonly WAIT_TOTAL=$(( WAIT_PERIOD * WAIT_PERIOD_MAX )) +readonly WAIT_QEMU=5 readonly PIDFILE_TEMPLATE=/tmp/vsock_vmtest_XXXX.pid declare -A PIDFILES
@@ -236,7 +236,7 @@ vm_start() { --append "${KERNEL_CMDLINE}" \ --rw &> ${logfile} &
- timeout "${WAIT_TOTAL}" \ + timeout "${WAIT_QEMU}" \ bash -c 'while [[ ! -s '"${pidfile}"' ]]; do sleep 1; done; exit 0' }
From: Bobby Eshleman bobbyeshleman@meta.com
Add check_result() function to reuse logic for incrementing the pass/fail counters. This function will get used by different callers as we add different types of tests in future patches (namely, namespace and non-namespace tests will be called at different places, and re-use this function).
Reviewed-by: Simon Horman horms@kernel.org Signed-off-by: Bobby Eshleman bobbyeshleman@meta.com --- Changes in v4: - fix botched rebase - use more consistent ${VAR} style
Changes in v3: - increment cnt_total directly (no intermediary var) (Stefano) - pass arg to check_result() from caller, dont incidentally rely on global (Stefano) - use new create_pidfile() introduce in v3 of earlier patch - continue with more disciplined variable quoting style --- tools/testing/selftests/vsock/vmtest.sh | 32 +++++++++++++++++++++----------- 1 file changed, 21 insertions(+), 11 deletions(-)
diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh index bd231467c66b..2dd9bbb8c4a9 100755 --- a/tools/testing/selftests/vsock/vmtest.sh +++ b/tools/testing/selftests/vsock/vmtest.sh @@ -79,6 +79,26 @@ die() { exit "${KSFT_FAIL}" }
+check_result() { + local rc arg + + rc=$1 + arg=$2 + + cnt_total=$(( cnt_total + 1 )) + + if [[ ${rc} -eq ${KSFT_PASS} ]]; then + cnt_pass=$(( cnt_pass + 1 )) + echo "ok ${cnt_total} ${arg}" + elif [[ ${rc} -eq ${KSFT_SKIP} ]]; then + cnt_skip=$(( cnt_skip + 1 )) + echo "ok ${cnt_total} ${arg} # SKIP" + elif [[ ${rc} -eq ${KSFT_FAIL} ]]; then + cnt_fail=$(( cnt_fail + 1 )) + echo "not ok ${cnt_total} ${arg} # exit=${rc}" + fi +} + vm_ssh() { ssh -q -o UserKnownHostsFile=/dev/null -p ${SSH_HOST_PORT} localhost "$@" return $? @@ -530,17 +550,7 @@ cnt_total=0 for arg in "${ARGS[@]}"; do run_test "${arg}" rc=$? - if [[ ${rc} -eq $KSFT_PASS ]]; then - cnt_pass=$(( cnt_pass + 1 )) - echo "ok ${cnt_total} ${arg}" - elif [[ ${rc} -eq $KSFT_SKIP ]]; then - cnt_skip=$(( cnt_skip + 1 )) - echo "ok ${cnt_total} ${arg} # SKIP" - elif [[ ${rc} -eq $KSFT_FAIL ]]; then - cnt_fail=$(( cnt_fail + 1 )) - echo "not ok ${cnt_total} ${arg} # exit=$rc" - fi - cnt_total=$(( cnt_total + 1 )) + check_result "${rc}" "${arg}" done
terminate_pidfiles "${pidfile}"
From: Bobby Eshleman bobbyeshleman@meta.com
In preparation for future patches that introduce tests that cannot re-use the same VM, add functions to identify those that *can* re-use a VM.
By continuing to re-use the same VM for these tests we can save time by avoiding the delay of booting a VM for every test.
Reviewed-by: Simon Horman horms@kernel.org Signed-off-by: Bobby Eshleman bobbyeshleman@meta.com --- Changes in v4: - fix botched rebase --- tools/testing/selftests/vsock/vmtest.sh | 63 ++++++++++++++++++++++++++------- 1 file changed, 50 insertions(+), 13 deletions(-)
diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh index 2dd9bbb8c4a9..a1c2969c44b6 100755 --- a/tools/testing/selftests/vsock/vmtest.sh +++ b/tools/testing/selftests/vsock/vmtest.sh @@ -46,6 +46,8 @@ readonly TEST_DESCS=( "Run vsock_test using the loopback transport in the VM." )
+readonly USE_SHARED_VM=(vm_server_host_client vm_client_host_server vm_loopback) + VERBOSE=0
usage() { @@ -461,7 +463,44 @@ test_vm_loopback() { return "${KSFT_PASS}" }
-run_test() { +shared_vm_test() { + local tname + + tname="${1}" + + for testname in "${USE_SHARED_VM[@]}"; do + if [[ "${tname}" == "${testname}" ]]; then + return 0 + fi + done + + return 1 +} + +shared_vm_tests_requested() { + for arg in "$@"; do + if shared_vm_test "${arg}"; then + return 0 + fi + done + + return 1 +} + +run_shared_vm_tests() { + local arg + + for arg in "$@"; do + if ! shared_vm_test "${arg}"; then + continue + fi + + run_shared_vm_test "${arg}" + check_result "$?" "${arg}" + done +} + +run_shared_vm_test() { local host_oops_cnt_before local host_warn_cnt_before local vm_oops_cnt_before @@ -537,23 +576,21 @@ handle_build
echo "1..${#ARGS[@]}"
-log_host "Booting up VM" -pidfile="$(create_pidfile)" -vm_start "${pidfile}" -vm_wait_for_ssh -log_host "VM booted up" - cnt_pass=0 cnt_fail=0 cnt_skip=0 cnt_total=0 -for arg in "${ARGS[@]}"; do - run_test "${arg}" - rc=$? - check_result "${rc}" "${arg}" -done
-terminate_pidfiles "${pidfile}" +if shared_vm_tests_requested "${ARGS[@]}"; then + log_host "Booting up VM" + pidfile="$(create_pidfile)" + vm_start "${pidfile}" + vm_wait_for_ssh + log_host "VM booted up" + + run_shared_vm_tests "${ARGS[@]}" + terminate_pidfiles "${pidfile}" +fi
echo "SUMMARY: PASS=${cnt_pass} SKIP=${cnt_skip} FAIL=${cnt_fail}" echo "Log: ${LOG}"
From: Bobby Eshleman bobbyeshleman@meta.com
Add the definition for BUILD and initialize it to zero. This avoids 'bash -u vmtest.sh` from throwing 'unbound variable' when BUILD is not set to 1 and is later checked for its value.
Signed-off-by: Bobby Eshleman bobbyeshleman@meta.com --- Changes in v2: - remove fixes tag because it doesn't fix breakage of kselftest, and just supports otherwise invoking with bash -u --- tools/testing/selftests/vsock/vmtest.sh | 1 + 1 file changed, 1 insertion(+)
diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh index a1c2969c44b6..e961b65b4c6e 100755 --- a/tools/testing/selftests/vsock/vmtest.sh +++ b/tools/testing/selftests/vsock/vmtest.sh @@ -548,6 +548,7 @@ run_shared_vm_test() { return "${rc}" }
+BUILD=0 QEMU="qemu-system-$(uname -m)"
while getopts :hvsq:b o
From: Bobby Eshleman bobbyeshleman@meta.com
Testing with 1.37 shows all tests passing but emits the warning:
warning: vng version 'virtme-ng 1.37' has not been tested and may not function properly. The following versions have been tested: 1.33 1.36
This patch adds 1.37 to the virtme-ng versions to get rid of the above warning.
Reviewed-by: Simon Horman horms@kernel.org Reviewed-by: Stefano Garzarella sgarzare@redhat.com Signed-off-by: Bobby Eshleman bobbyeshleman@meta.com --- tools/testing/selftests/vsock/vmtest.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh index e961b65b4c6e..b611172da09e 100755 --- a/tools/testing/selftests/vsock/vmtest.sh +++ b/tools/testing/selftests/vsock/vmtest.sh @@ -156,7 +156,7 @@ check_vng() { local version local ok
- tested_versions=("1.33" "1.36") + tested_versions=("1.33" "1.36" "1.37") version="$(vng --version)"
ok=0
From: Bobby Eshleman bobbyeshleman@meta.com
Add vsock_loopback module loading to the loopback test so that vmtest.sh can be used for kernels built with loopback as a module.
This is not technically a fix as kselftest expects loopback to be built-in already (defined in selftests/vsock/config). This is useful only for using vmtest.sh outside of kselftest.
Reviewed-by: Stefano Garzarella sgarzare@redhat.com Signed-off-by: Bobby Eshleman bobbyeshleman@meta.com --- tools/testing/selftests/vsock/vmtest.sh | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh index b611172da09e..42e155b45602 100755 --- a/tools/testing/selftests/vsock/vmtest.sh +++ b/tools/testing/selftests/vsock/vmtest.sh @@ -452,6 +452,8 @@ test_vm_client_host_server() { test_vm_loopback() { local port=60000 # non-forwarded local port
+ vm_ssh -- modprobe vsock_loopback &> /dev/null || : + if ! vm_vsock_test "server" 1 "${port}"; then return "${KSFT_FAIL}" fi
From: Bobby Eshleman bobbyeshleman@meta.com
Disable shellcheck rules SC2317 and SC2119. These rules are being triggered due to false positives. For SC2317, many `return "${KSFT_PASS}"` lines are reported as unreachable, even though they are executed during normal runs. For SC2119, the fact that log_guest/log_host accept either stdin or arguments triggers SC2119, despite being valid.
Signed-off-by: Bobby Eshleman bobbyeshleman@meta.com --- tools/testing/selftests/vsock/vmtest.sh | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh index 42e155b45602..c7b270dd77a9 100755 --- a/tools/testing/selftests/vsock/vmtest.sh +++ b/tools/testing/selftests/vsock/vmtest.sh @@ -7,6 +7,8 @@ # * virtme-ng # * busybox-static (used by virtme-ng) # * qemu (used by virtme-ng) +# +# shellcheck disable=SC2317,SC2119
readonly SCRIPT_DIR="$(cd -P -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)" readonly KERNEL_CHECKOUT=$(realpath "${SCRIPT_DIR}"/../../../../)
On 11/8/25 5:00 PM, Bobby Eshleman wrote:
This patch series refactors the vsock selftest VM infrastructure to improve test run times, improve logging, and prepare for future tests which make heavy usage of these refactored functions and have new requirements such as simultaneous QEMU processes.
These patches were broken off from this prior series: https://lore.kernel.org/all/20251021-vsock-vmtest-v7-0-0661b7b6f081@meta.com...
To: Stefano Garzarella sgarzare@redhat.com To: Shuah Khan shuah@kernel.org Cc: virtualization@lists.linux.dev Cc: netdev@vger.kernel.org Cc: linux-kselftest@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Simon Horman horms@kernel.org
Changes in v4:
- fix messed up rebase (wrt check_result() and shared_vm_test() patches)
- more consistent variable quotes style
- use associative array for pidfiles, remove after terminate
- Link to v3: https://lore.kernel.org/r/20251106-vsock-selftests-fixes-and-improvements-v3...
Changes in v3:
- see per-patch changes
- Link to v2: https://lore.kernel.org/all/20251104-vsock-selftests-fixes-and-improvements-...
Changes in v2:
- remove "Fixes" for some patches because they do not fix bugs in kselftest runs (some fix bugs only when using bash args that kselftest does not use or otherwise prepare functions for new usage)
- broke out one fixes patch for "net"
- per-patch changes
- add patch for shellcheck declaration to disable false positives
- Link to v1: https://lore.kernel.org/r/20251022-vsock-selftests-fixes-and-improvements-v1...
Series LGTM, but let's wait a little bit more for explicit ack from Stefano.
Thanks,
Paolo
linux-kselftest-mirror@lists.linaro.org
-
Bobby Eshleman -
Paolo Abeni