On Wed, Dec 10, 2025 at 10:16:01PM -0700, Caleb Sander Mateos wrote:
The kublk mock ublk server allows multiple data copy mode arguments to be passed on the command line (--zero_copy, --get_data, and --auto_zc). The ublk device will be created with all the requested feature flags, however kublk will only use one of the modes to interact with request data (arbitrarily preferring auto_zc over zero_copy over get_data). To clarify the intent of the test, don't allow multiple data copy modes to be specified. Don't set UBLK_F_USER_COPY for zero_copy, as it's an independent feature. Don't require zero_copy for auto_zc_fallback, as only auto_zc is needed. Fix the test cases passing multiple data copy mode arguments.
Signed-off-by: Caleb Sander Mateos csander@purestorage.com
tools/testing/selftests/ublk/kublk.c | 21 ++++++++++++------- .../testing/selftests/ublk/test_generic_09.sh | 2 +- .../testing/selftests/ublk/test_stress_03.sh | 4 ++-- .../testing/selftests/ublk/test_stress_04.sh | 2 +- .../testing/selftests/ublk/test_stress_05.sh | 10 ++++----- 5 files changed, 22 insertions(+), 17 deletions(-)
diff --git a/tools/testing/selftests/ublk/kublk.c b/tools/testing/selftests/ublk/kublk.c index f8fa102a627f..1765c4806523 100644 --- a/tools/testing/selftests/ublk/kublk.c +++ b/tools/testing/selftests/ublk/kublk.c @@ -1611,11 +1611,11 @@ int main(int argc, char *argv[]) break; case 'd': ctx.queue_depth = strtol(optarg, NULL, 10); break; case 'z':
ctx.flags |= UBLK_F_SUPPORT_ZERO_COPY | UBLK_F_USER_COPY;
ctx.flags |= UBLK_F_SUPPORT_ZERO_COPY; break;@@ -1674,17 +1674,22 @@ int main(int argc, char *argv[]) optind += 1; break; } }
- /* auto_zc_fallback depends on F_AUTO_BUF_REG & F_SUPPORT_ZERO_COPY */
- if (ctx.auto_zc_fallback &&
!((ctx.flags & UBLK_F_AUTO_BUF_REG) &&(ctx.flags & UBLK_F_SUPPORT_ZERO_COPY))) {ublk_err("%s: auto_zc_fallback is set but neither ""F_AUTO_BUF_REG nor F_SUPPORT_ZERO_COPY is enabled\n",__func__);
- /* auto_zc_fallback depends on F_AUTO_BUF_REG */
- if (ctx.auto_zc_fallback && !(ctx.flags & UBLK_F_AUTO_BUF_REG)) {
ublk_err("%s: auto_zc_fallback is set but F_AUTO_BUF_REG is disabled\n",__func__);return -EINVAL;- }
- if (!!(ctx.flags & UBLK_F_SUPPORT_ZERO_COPY) +
!!(ctx.flags & UBLK_F_NEED_GET_DATA) +!!(ctx.flags & UBLK_F_USER_COPY) +!!(ctx.flags & UBLK_F_AUTO_BUF_REG) > 1) {fprintf(stderr, "too many data copy modes specified\n");
Actually most of them are allowed to co-exist, such as -z/--auto_zc/-u.
i = optind; while (i < argc && ctx.nr_files < MAX_BACK_FILES) { diff --git a/tools/testing/selftests/ublk/test_generic_09.sh b/tools/testing/selftests/ublk/test_generic_09.sh index bb6f77ca5522..145e17b3d2b0 100755 --- a/tools/testing/selftests/ublk/test_generic_09.sh +++ b/tools/testing/selftests/ublk/test_generic_09.sh @@ -14,11 +14,11 @@ if ! _have_program fio; then exit "$UBLK_SKIP_CODE" fi _prep_test "null" "basic IO test" -dev_id=$(_add_ublk_dev -t null -z --auto_zc --auto_zc_fallback) +dev_id=$(_add_ublk_dev -t null --auto_zc --auto_zc_fallback) _check_add_dev $TID $? # run fio over the two disks fio --name=job1 --filename=/dev/ublkb"${dev_id}" --ioengine=libaio --rw=readwrite --iodepth=32 --size=256M > /dev/null 2>&1 ERR_CODE=$? diff --git a/tools/testing/selftests/ublk/test_stress_03.sh b/tools/testing/selftests/ublk/test_stress_03.sh index 3ed4c9b2d8c0..8e9f2786ef9c 100755 --- a/tools/testing/selftests/ublk/test_stress_03.sh +++ b/tools/testing/selftests/ublk/test_stress_03.sh @@ -36,19 +36,19 @@ wait if _have_feature "AUTO_BUF_REG"; then ublk_io_and_remove 8G -t null -q 4 --auto_zc & ublk_io_and_remove 256M -t loop -q 4 --auto_zc "${UBLK_BACKFILES[0]}" & ublk_io_and_remove 256M -t stripe -q 4 --auto_zc "${UBLK_BACKFILES[1]}" "${UBLK_BACKFILES[2]}" &
- ublk_io_and_remove 8G -t null -q 4 -z --auto_zc --auto_zc_fallback &
- ublk_io_and_remove 8G -t null -q 4 --auto_zc --auto_zc_fallback & wait
fi if _have_feature "PER_IO_DAEMON"; then ublk_io_and_remove 8G -t null -q 4 --auto_zc --nthreads 8 --per_io_tasks & ublk_io_and_remove 256M -t loop -q 4 --auto_zc --nthreads 8 --per_io_tasks "${UBLK_BACKFILES[0]}" & ublk_io_and_remove 256M -t stripe -q 4 --auto_zc --nthreads 8 --per_io_tasks "${UBLK_BACKFILES[1]}" "${UBLK_BACKFILES[2]}" &
- ublk_io_and_remove 8G -t null -q 4 -z --auto_zc --auto_zc_fallback --nthreads 8 --per_io_tasks &
- ublk_io_and_remove 8G -t null -q 4 --auto_zc --auto_zc_fallback --nthreads 8 --per_io_tasks & wait
fi _cleanup_test "stress" _show_result $TID $ERR_CODE diff --git a/tools/testing/selftests/ublk/test_stress_04.sh b/tools/testing/selftests/ublk/test_stress_04.sh index c7220723b537..6e165a1f90b4 100755 --- a/tools/testing/selftests/ublk/test_stress_04.sh +++ b/tools/testing/selftests/ublk/test_stress_04.sh @@ -35,11 +35,11 @@ wait if _have_feature "AUTO_BUF_REG"; then ublk_io_and_kill_daemon 8G -t null -q 4 --auto_zc & ublk_io_and_kill_daemon 256M -t loop -q 4 --auto_zc "${UBLK_BACKFILES[0]}" & ublk_io_and_kill_daemon 256M -t stripe -q 4 --auto_zc --no_ublk_fixed_fd "${UBLK_BACKFILES[1]}" "${UBLK_BACKFILES[2]}" &
- ublk_io_and_kill_daemon 8G -t null -q 4 -z --auto_zc --auto_zc_fallback &
- ublk_io_and_kill_daemon 8G -t null -q 4 --auto_zc --auto_zc_fallback & wait
fi if _have_feature "PER_IO_DAEMON"; then ublk_io_and_kill_daemon 8G -t null -q 4 --auto_zc --nthreads 8 --per_io_tasks & diff --git a/tools/testing/selftests/ublk/test_stress_05.sh b/tools/testing/selftests/ublk/test_stress_05.sh index 274295061042..09b94c36f2ba 100755 --- a/tools/testing/selftests/ublk/test_stress_05.sh +++ b/tools/testing/selftests/ublk/test_stress_05.sh @@ -56,21 +56,21 @@ for reissue in $(seq 0 1); do wait done if _have_feature "ZERO_COPY"; then for reissue in $(seq 0 1); do
ublk_io_and_remove 8G -t null -q 4 -g -z -r 1 -i "$reissue" &ublk_io_and_remove 256M -t loop -q 4 -g -z -r 1 -i "$reissue" "${UBLK_BACKFILES[1]}" &
ublk_io_and_remove 8G -t null -q 4 -z -r 1 -i "$reissue" &ublk_io_and_remove 256M -t loop -q 4 -z -r 1 -i "$reissue" "${UBLK_BACKFILES[1]}" &fi if _have_feature "AUTO_BUF_REG"; then for reissue in $(seq 0 1); do
ublk_io_and_remove 8G -t null -q 4 -g --auto_zc -r 1 -i "$reissue" &ublk_io_and_remove 256M -t loop -q 4 -g --auto_zc -r 1 -i "$reissue" "${UBLK_BACKFILES[1]}" &ublk_io_and_remove 8G -t null -q 4 -g -z --auto_zc --auto_zc_fallback -r 1 -i "$reissue" &
ublk_io_and_remove 8G -t null -q 4 --auto_zc -r 1 -i "$reissue" &ublk_io_and_remove 256M -t loop -q 4 --auto_zc -r 1 -i "$reissue" "${UBLK_BACKFILES[1]}" &ublk_io_and_remove 8G -t null -q 4 --auto_zc --auto_zc_fallback -r 1 -i "$reissue" &
--auto_zc_fallback requires both -z and --auto_zc.
Thanks, Ming