c085b6e3a7
Also, add two more features "tx-tcp-segmentation" and "tx-tcp6-segmentation". There are two reasons for that: - systemd-networkd supports setting these two features, so lets support them too (apparently they are important enough for networkd). - these two features are already implicitly covered by "tso". Like for the "ethtool" program, "tso" is an alias for several actual features. By adding two features that are already also covered by an alias (which sets multiple kernel names at once), we showcase how aliases for the same feature can coexist. In particular, note how setting "tso on tx-tcp6-segmentation off" will behave as one would expect: all 4 tso features covered by the alias are enabled, except that particular one.
148 lines
4.4 KiB
C
148 lines
4.4 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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/*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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* Copyright 2018 Red Hat, Inc.
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*/
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#include "nm-default.h"
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#include "nm-ethtool-utils.h"
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#include "nm-setting-ethtool.h"
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/*****************************************************************************/
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#define ETHT_DATA(xname) \
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[NM_ETHTOOL_ID_##xname] = (&((const NMEthtoolData) { \
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.optname = NM_ETHTOOL_OPTNAME_##xname, \
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.id = NM_ETHTOOL_ID_##xname, \
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}))
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const NMEthtoolData *const nm_ethtool_data[_NM_ETHTOOL_ID_NUM + 1] = {
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/* indexed by NMEthtoolID */
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ETHT_DATA (FEATURE_GRO),
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ETHT_DATA (FEATURE_GSO),
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ETHT_DATA (FEATURE_LRO),
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ETHT_DATA (FEATURE_NTUPLE),
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ETHT_DATA (FEATURE_RX),
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ETHT_DATA (FEATURE_RXHASH),
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ETHT_DATA (FEATURE_RXVLAN),
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ETHT_DATA (FEATURE_SG),
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ETHT_DATA (FEATURE_TSO),
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ETHT_DATA (FEATURE_TX),
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ETHT_DATA (FEATURE_TXVLAN),
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ETHT_DATA (FEATURE_TX_TCP6_SEGMENTATION),
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ETHT_DATA (FEATURE_TX_TCP_SEGMENTATION),
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[_NM_ETHTOOL_ID_NUM] = NULL,
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};
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const guint8 const _by_name[_NM_ETHTOOL_ID_NUM] = {
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/* sorted by optname. */
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NM_ETHTOOL_ID_FEATURE_GRO,
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NM_ETHTOOL_ID_FEATURE_GSO,
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NM_ETHTOOL_ID_FEATURE_LRO,
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NM_ETHTOOL_ID_FEATURE_NTUPLE,
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NM_ETHTOOL_ID_FEATURE_RX,
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NM_ETHTOOL_ID_FEATURE_RXHASH,
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NM_ETHTOOL_ID_FEATURE_RXVLAN,
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NM_ETHTOOL_ID_FEATURE_SG,
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NM_ETHTOOL_ID_FEATURE_TSO,
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NM_ETHTOOL_ID_FEATURE_TX,
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NM_ETHTOOL_ID_FEATURE_TX_TCP_SEGMENTATION,
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NM_ETHTOOL_ID_FEATURE_TX_TCP6_SEGMENTATION,
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NM_ETHTOOL_ID_FEATURE_TXVLAN,
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};
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/*****************************************************************************/
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static void
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_ASSERT_data (void)
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{
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#if NM_MORE_ASSERTS > 10
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int i;
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G_STATIC_ASSERT_EXPR (_NM_ETHTOOL_ID_FIRST == 0);
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G_STATIC_ASSERT_EXPR (_NM_ETHTOOL_ID_LAST == _NM_ETHTOOL_ID_NUM - 1);
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G_STATIC_ASSERT_EXPR (_NM_ETHTOOL_ID_NUM > 0);
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nm_assert (NM_PTRARRAY_LEN (nm_ethtool_data) == _NM_ETHTOOL_ID_NUM);
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nm_assert (G_N_ELEMENTS (_by_name) == _NM_ETHTOOL_ID_NUM);
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nm_assert (G_N_ELEMENTS (nm_ethtool_data) == _NM_ETHTOOL_ID_NUM + 1);
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for (i = 0; i < _NM_ETHTOOL_ID_NUM; i++) {
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const NMEthtoolData *d = nm_ethtool_data[i];
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nm_assert (d);
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nm_assert (d->id == (NMEthtoolID) i);
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nm_assert (d->optname && d->optname[0]);
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}
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for (i = 0; i < _NM_ETHTOOL_ID_NUM; i++) {
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NMEthtoolID id = _by_name[i];
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const NMEthtoolData *d;
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nm_assert (id >= 0);
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nm_assert (id < _NM_ETHTOOL_ID_NUM);
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d = nm_ethtool_data[id];
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if (i > 0) {
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/* since we assert that all optnames are sorted strictly monotonically increasing,
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* it also follows that there are no duplicates in the _by_name.
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* It also follows, that all names in nm_ethtool_data are unique. */
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if (strcmp (nm_ethtool_data[_by_name[i - 1]]->optname, d->optname) >= 0) {
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g_error ("nm_ethtool_data is not sorted asciibetically: %u/%s should be after %u/%s",
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i - 1, nm_ethtool_data[_by_name[i - 1]]->optname,
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i, d->optname);
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}
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}
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}
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#endif
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}
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static int
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_by_name_cmp (gconstpointer a,
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gconstpointer b,
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gpointer user_data)
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{
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const guint8 *p_id = a;
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const char *optname = b;
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nm_assert (p_id && p_id >= _by_name && p_id <= &_by_name[_NM_ETHTOOL_ID_NUM]);
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nm_assert (*p_id < _NM_ETHTOOL_ID_NUM);
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return strcmp (nm_ethtool_data[*p_id]->optname, optname);
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}
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const NMEthtoolData *
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nm_ethtool_data_get_by_optname (const char *optname)
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{
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gssize idx;
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nm_assert (optname);
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_ASSERT_data ();
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idx = nm_utils_array_find_binary_search ((gconstpointer *) _by_name,
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sizeof (_by_name[0]),
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_NM_ETHTOOL_ID_NUM,
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optname,
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_by_name_cmp,
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NULL);
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return (idx < 0) ? NULL : nm_ethtool_data[_by_name[idx]];
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}
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