selftests: drv-net: rss_ctx: check behavior of indirection table resizing

import random

from lib.py import ksft_run, ksft_pr, ksft_exit, ksft_eq, ksft_ge, ksft_lt

from lib.py import NetDrvEpEnv

from lib.py import NetdevFamily

from lib.py import EthtoolFamily, NetdevFamily

from lib.py import KsftSkipEx

from lib.py import rand_port

from lib.py import ethtool, ip, defer, GenerateTraffic, CmdExitFailure

        raise Exception(f"Driver didn't prevent us from deactivating a used queue (context {ctx_id})")

def test_rss_resize(cfg):

    """Test resizing of the RSS table.

    Some devices dynamically increase and decrease the size of the RSS

    indirection table based on the number of enabled queues.

    When that happens driver must maintain the balance of entries

    (preferably duplicating the smaller table).

    """

    channels = cfg.ethnl.channels_get({'header': {'dev-index': cfg.ifindex}})

    ch_max = channels['combined-max']

    qcnt = channels['combined-count']

    if ch_max < 2:

        raise KsftSkipEx(f"Not enough queues for the test: {ch_max}")

    ethtool(f"-L {cfg.ifname} combined 2")

    defer(ethtool, f"-L {cfg.ifname} combined {qcnt}")

    ethtool(f"-X {cfg.ifname} weight 1 7")

    defer(ethtool, f"-X {cfg.ifname} default")

    ethtool(f"-L {cfg.ifname} combined {ch_max}")

    data = get_rss(cfg)

    ksft_eq(0, min(data['rss-indirection-table']))

    ksft_eq(1, max(data['rss-indirection-table']))

    ksft_eq(7,

            data['rss-indirection-table'].count(1) /

            data['rss-indirection-table'].count(0),

            f"Table imbalance after resize: {data['rss-indirection-table']}")

def test_rss_context(cfg, ctx_cnt=1, create_with_cfg=None):

    """

    Test separating traffic into RSS contexts.

def main() -> None:

    with NetDrvEpEnv(__file__, nsim_test=False) as cfg:

        cfg.ethnl = EthtoolFamily()

        cfg.netdevnl = NetdevFamily()

        ksft_run([test_rss_key_indir, test_rss_queue_reconfigure,

                  test_rss_resize,

                  test_rss_context, test_rss_context4, test_rss_context32,

                  test_rss_context_queue_reconfigure,

                  test_rss_context_overlap, test_rss_context_overlap2,