The test currently modifies the HDS settings and doesn't restore them. This may cause subsequent tests to fail (or pass when they should not). Add defer()ed reset handling.

Signed-off-by: Jakub Kicinski kuba@kernel.org --- tools/testing/selftests/drivers/net/hds.py | 38 ++++++++++++++++++++++ 1 file changed, 38 insertions(+)

diff --git a/tools/testing/selftests/drivers/net/hds.py b/tools/testing/selftests/drivers/net/hds.py index 7c90a040ce45..abad81a88ba9 100755 --- a/tools/testing/selftests/drivers/net/hds.py +++ b/tools/testing/selftests/drivers/net/hds.py @@ -58,7 +58,39 @@ from lib.py import defer, ethtool, ip, random if 'hds-thresh' not in rings: raise KsftSkipEx('hds-thresh not supported by device')

+ +def _hds_reset(cfg, netnl, rings) -> None: + cur = netnl.rings_get({'header': {'dev-index': cfg.ifindex}}) + + arg = {'header': {'dev-index': cfg.ifindex}} + if cur.get('tcp-data-split') != rings.get('tcp-data-split'): + # Try to reset to "unknown" first, we don't know if the setting + # was the default or user chose it. Default seems more likely. + arg['tcp-data-split'] = "unknown" + netnl.rings_set(arg) + cur = netnl.rings_get({'header': {'dev-index': cfg.ifindex}}) + if cur['tcp-data-split'] == rings['tcp-data-split']: + del arg['tcp-data-split'] + else: + # Try the explicit setting + arg['tcp-data-split'] = rings['tcp-data-split'] + if cur.get('hds-thresh') != rings.get('hds-thresh'): + arg['hds-thresh'] = rings['hds-thresh'] + if len(arg) > 1: + netnl.rings_set(arg) + + +def _defer_reset_hds(cfg, netnl) -> dict | None: + try: + rings = netnl.rings_get({'header': {'dev-index': cfg.ifindex}}) + if 'hds-thresh' in rings or 'tcp-data-split' in rings: + defer(_hds_reset, cfg, netnl, rings) + except NlError as e: + pass + + def set_hds_enable(cfg, netnl) -> None: + _defer_reset_hds(cfg, netnl) try: netnl.rings_set({'header': {'dev-index': cfg.ifindex}, 'tcp-data-split': 'enabled'}) except NlError as e: @@ -76,6 +108,7 @@ from lib.py import defer, ethtool, ip, random ksft_eq('enabled', rings['tcp-data-split'])

def set_hds_disable(cfg, netnl) -> None: + _defer_reset_hds(cfg, netnl) try: netnl.rings_set({'header': {'dev-index': cfg.ifindex}, 'tcp-data-split': 'disabled'}) except NlError as e: @@ -93,6 +126,7 @@ from lib.py import defer, ethtool, ip, random ksft_eq('disabled', rings['tcp-data-split'])

def set_hds_thresh_zero(cfg, netnl) -> None: + _defer_reset_hds(cfg, netnl) try: netnl.rings_set({'header': {'dev-index': cfg.ifindex}, 'hds-thresh': 0}) except NlError as e: @@ -110,6 +144,7 @@ from lib.py import defer, ethtool, ip, random ksft_eq(0, rings['hds-thresh'])

def set_hds_thresh_random(cfg, netnl) -> None: + _defer_reset_hds(cfg, netnl) try: rings = netnl.rings_get({'header': {'dev-index': cfg.ifindex}}) except NlError as e: @@ -140,6 +175,7 @@ from lib.py import defer, ethtool, ip, random ksft_eq(hds_thresh, rings['hds-thresh'])

def set_hds_thresh_max(cfg, netnl) -> None: + _defer_reset_hds(cfg, netnl) try: rings = netnl.rings_get({'header': {'dev-index': cfg.ifindex}}) except NlError as e: @@ -157,6 +193,7 @@ from lib.py import defer, ethtool, ip, random ksft_eq(rings['hds-thresh'], rings['hds-thresh-max'])

def set_hds_thresh_gt(cfg, netnl) -> None: + _defer_reset_hds(cfg, netnl) try: rings = netnl.rings_get({'header': {'dev-index': cfg.ifindex}}) except NlError as e: @@ -178,6 +215,7 @@ from lib.py import defer, ethtool, ip, random """ mode = _get_hds_mode(cfg, netnl) if mode == 'enabled': + _defer_reset_hds(cfg, netnl) netnl.rings_set({'header': {'dev-index': cfg.ifindex}, 'tcp-data-split': 'unknown'})