628 lines
18 KiB
C
628 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright (C) 2005 Marc Kleine-Budde, Pengutronix
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* Copyright (C) 2006 Andrey Volkov, Varma Electronics
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* Copyright (C) 2008-2009 Wolfgang Grandegger <wg@grandegger.com>
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* Copyright (C) 2021 Vincent Mailhol <mailhol.vincent@wanadoo.fr>
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*/
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#include <linux/can/dev.h>
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#include <net/rtnetlink.h>
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static const struct nla_policy can_policy[IFLA_CAN_MAX + 1] = {
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[IFLA_CAN_STATE] = { .type = NLA_U32 },
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[IFLA_CAN_CTRLMODE] = { .len = sizeof(struct can_ctrlmode) },
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[IFLA_CAN_RESTART_MS] = { .type = NLA_U32 },
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[IFLA_CAN_RESTART] = { .type = NLA_U32 },
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[IFLA_CAN_BITTIMING] = { .len = sizeof(struct can_bittiming) },
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[IFLA_CAN_BITTIMING_CONST] = { .len = sizeof(struct can_bittiming_const) },
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[IFLA_CAN_CLOCK] = { .len = sizeof(struct can_clock) },
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[IFLA_CAN_BERR_COUNTER] = { .len = sizeof(struct can_berr_counter) },
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[IFLA_CAN_DATA_BITTIMING] = { .len = sizeof(struct can_bittiming) },
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[IFLA_CAN_DATA_BITTIMING_CONST] = { .len = sizeof(struct can_bittiming_const) },
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[IFLA_CAN_TERMINATION] = { .type = NLA_U16 },
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[IFLA_CAN_TDC] = { .type = NLA_NESTED },
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[IFLA_CAN_CTRLMODE_EXT] = { .type = NLA_NESTED },
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};
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static const struct nla_policy can_tdc_policy[IFLA_CAN_TDC_MAX + 1] = {
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[IFLA_CAN_TDC_TDCV_MIN] = { .type = NLA_U32 },
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[IFLA_CAN_TDC_TDCV_MAX] = { .type = NLA_U32 },
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[IFLA_CAN_TDC_TDCO_MIN] = { .type = NLA_U32 },
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[IFLA_CAN_TDC_TDCO_MAX] = { .type = NLA_U32 },
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[IFLA_CAN_TDC_TDCF_MIN] = { .type = NLA_U32 },
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[IFLA_CAN_TDC_TDCF_MAX] = { .type = NLA_U32 },
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[IFLA_CAN_TDC_TDCV] = { .type = NLA_U32 },
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[IFLA_CAN_TDC_TDCO] = { .type = NLA_U32 },
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[IFLA_CAN_TDC_TDCF] = { .type = NLA_U32 },
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};
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static int can_validate(struct nlattr *tb[], struct nlattr *data[],
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struct netlink_ext_ack *extack)
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{
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bool is_can_fd = false;
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/* Make sure that valid CAN FD configurations always consist of
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* - nominal/arbitration bittiming
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* - data bittiming
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* - control mode with CAN_CTRLMODE_FD set
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* - TDC parameters are coherent (details below)
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*/
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if (!data)
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return 0;
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if (data[IFLA_CAN_CTRLMODE]) {
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struct can_ctrlmode *cm = nla_data(data[IFLA_CAN_CTRLMODE]);
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u32 tdc_flags = cm->flags & CAN_CTRLMODE_TDC_MASK;
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is_can_fd = cm->flags & cm->mask & CAN_CTRLMODE_FD;
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/* CAN_CTRLMODE_TDC_{AUTO,MANUAL} are mutually exclusive */
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if (tdc_flags == CAN_CTRLMODE_TDC_MASK)
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return -EOPNOTSUPP;
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/* If one of the CAN_CTRLMODE_TDC_* flag is set then
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* TDC must be set and vice-versa
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*/
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if (!!tdc_flags != !!data[IFLA_CAN_TDC])
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return -EOPNOTSUPP;
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/* If providing TDC parameters, at least TDCO is
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* needed. TDCV is needed if and only if
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* CAN_CTRLMODE_TDC_MANUAL is set
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*/
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if (data[IFLA_CAN_TDC]) {
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struct nlattr *tb_tdc[IFLA_CAN_TDC_MAX + 1];
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int err;
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err = nla_parse_nested(tb_tdc, IFLA_CAN_TDC_MAX,
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data[IFLA_CAN_TDC],
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can_tdc_policy, extack);
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if (err)
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return err;
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if (tb_tdc[IFLA_CAN_TDC_TDCV]) {
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if (tdc_flags & CAN_CTRLMODE_TDC_AUTO)
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return -EOPNOTSUPP;
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} else {
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if (tdc_flags & CAN_CTRLMODE_TDC_MANUAL)
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return -EOPNOTSUPP;
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}
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if (!tb_tdc[IFLA_CAN_TDC_TDCO])
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return -EOPNOTSUPP;
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}
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}
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if (is_can_fd) {
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if (!data[IFLA_CAN_BITTIMING] || !data[IFLA_CAN_DATA_BITTIMING])
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return -EOPNOTSUPP;
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}
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if (data[IFLA_CAN_DATA_BITTIMING] || data[IFLA_CAN_TDC]) {
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if (!is_can_fd)
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return -EOPNOTSUPP;
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}
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return 0;
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}
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static int can_tdc_changelink(struct can_priv *priv, const struct nlattr *nla,
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struct netlink_ext_ack *extack)
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{
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struct nlattr *tb_tdc[IFLA_CAN_TDC_MAX + 1];
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struct can_tdc tdc = { 0 };
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const struct can_tdc_const *tdc_const = priv->tdc_const;
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int err;
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if (!tdc_const || !can_tdc_is_enabled(priv))
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return -EOPNOTSUPP;
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err = nla_parse_nested(tb_tdc, IFLA_CAN_TDC_MAX, nla,
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can_tdc_policy, extack);
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if (err)
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return err;
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if (tb_tdc[IFLA_CAN_TDC_TDCV]) {
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u32 tdcv = nla_get_u32(tb_tdc[IFLA_CAN_TDC_TDCV]);
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if (tdcv < tdc_const->tdcv_min || tdcv > tdc_const->tdcv_max)
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return -EINVAL;
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tdc.tdcv = tdcv;
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}
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if (tb_tdc[IFLA_CAN_TDC_TDCO]) {
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u32 tdco = nla_get_u32(tb_tdc[IFLA_CAN_TDC_TDCO]);
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if (tdco < tdc_const->tdco_min || tdco > tdc_const->tdco_max)
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return -EINVAL;
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tdc.tdco = tdco;
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}
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if (tb_tdc[IFLA_CAN_TDC_TDCF]) {
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u32 tdcf = nla_get_u32(tb_tdc[IFLA_CAN_TDC_TDCF]);
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if (tdcf < tdc_const->tdcf_min || tdcf > tdc_const->tdcf_max)
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return -EINVAL;
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tdc.tdcf = tdcf;
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}
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priv->tdc = tdc;
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return 0;
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}
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static int can_changelink(struct net_device *dev, struct nlattr *tb[],
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struct nlattr *data[],
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struct netlink_ext_ack *extack)
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{
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struct can_priv *priv = netdev_priv(dev);
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u32 tdc_mask = 0;
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int err;
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/* We need synchronization with dev->stop() */
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ASSERT_RTNL();
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if (data[IFLA_CAN_BITTIMING]) {
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struct can_bittiming bt;
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/* Do not allow changing bittiming while running */
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if (dev->flags & IFF_UP)
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return -EBUSY;
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/* Calculate bittiming parameters based on
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* bittiming_const if set, otherwise pass bitrate
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* directly via do_set_bitrate(). Bail out if neither
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* is given.
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*/
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if (!priv->bittiming_const && !priv->do_set_bittiming &&
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!priv->bitrate_const)
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return -EOPNOTSUPP;
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memcpy(&bt, nla_data(data[IFLA_CAN_BITTIMING]), sizeof(bt));
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err = can_get_bittiming(dev, &bt,
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priv->bittiming_const,
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priv->bitrate_const,
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priv->bitrate_const_cnt);
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if (err)
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return err;
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if (priv->bitrate_max && bt.bitrate > priv->bitrate_max) {
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netdev_err(dev, "arbitration bitrate surpasses transceiver capabilities of %d bps\n",
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priv->bitrate_max);
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return -EINVAL;
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}
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memcpy(&priv->bittiming, &bt, sizeof(bt));
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if (priv->do_set_bittiming) {
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/* Finally, set the bit-timing registers */
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err = priv->do_set_bittiming(dev);
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if (err)
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return err;
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}
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}
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if (data[IFLA_CAN_CTRLMODE]) {
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struct can_ctrlmode *cm;
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u32 ctrlstatic;
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u32 maskedflags;
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/* Do not allow changing controller mode while running */
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if (dev->flags & IFF_UP)
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return -EBUSY;
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cm = nla_data(data[IFLA_CAN_CTRLMODE]);
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ctrlstatic = can_get_static_ctrlmode(priv);
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maskedflags = cm->flags & cm->mask;
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/* check whether provided bits are allowed to be passed */
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if (maskedflags & ~(priv->ctrlmode_supported | ctrlstatic))
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return -EOPNOTSUPP;
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/* do not check for static fd-non-iso if 'fd' is disabled */
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if (!(maskedflags & CAN_CTRLMODE_FD))
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ctrlstatic &= ~CAN_CTRLMODE_FD_NON_ISO;
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/* make sure static options are provided by configuration */
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if ((maskedflags & ctrlstatic) != ctrlstatic)
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return -EOPNOTSUPP;
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/* clear bits to be modified and copy the flag values */
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priv->ctrlmode &= ~cm->mask;
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priv->ctrlmode |= maskedflags;
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/* CAN_CTRLMODE_FD can only be set when driver supports FD */
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if (priv->ctrlmode & CAN_CTRLMODE_FD) {
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dev->mtu = CANFD_MTU;
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} else {
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dev->mtu = CAN_MTU;
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memset(&priv->data_bittiming, 0,
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sizeof(priv->data_bittiming));
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priv->ctrlmode &= ~CAN_CTRLMODE_TDC_MASK;
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memset(&priv->tdc, 0, sizeof(priv->tdc));
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}
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tdc_mask = cm->mask & CAN_CTRLMODE_TDC_MASK;
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/* CAN_CTRLMODE_TDC_{AUTO,MANUAL} are mutually
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* exclusive: make sure to turn the other one off
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*/
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if (tdc_mask)
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priv->ctrlmode &= cm->flags | ~CAN_CTRLMODE_TDC_MASK;
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}
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if (data[IFLA_CAN_RESTART_MS]) {
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/* Do not allow changing restart delay while running */
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if (dev->flags & IFF_UP)
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return -EBUSY;
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priv->restart_ms = nla_get_u32(data[IFLA_CAN_RESTART_MS]);
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}
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if (data[IFLA_CAN_RESTART]) {
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/* Do not allow a restart while not running */
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if (!(dev->flags & IFF_UP))
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return -EINVAL;
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err = can_restart_now(dev);
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if (err)
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return err;
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}
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if (data[IFLA_CAN_DATA_BITTIMING]) {
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struct can_bittiming dbt;
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/* Do not allow changing bittiming while running */
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if (dev->flags & IFF_UP)
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return -EBUSY;
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/* Calculate bittiming parameters based on
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* data_bittiming_const if set, otherwise pass bitrate
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* directly via do_set_bitrate(). Bail out if neither
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* is given.
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*/
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if (!priv->data_bittiming_const && !priv->do_set_data_bittiming &&
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!priv->data_bitrate_const)
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return -EOPNOTSUPP;
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memcpy(&dbt, nla_data(data[IFLA_CAN_DATA_BITTIMING]),
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sizeof(dbt));
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err = can_get_bittiming(dev, &dbt,
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priv->data_bittiming_const,
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priv->data_bitrate_const,
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priv->data_bitrate_const_cnt);
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if (err)
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return err;
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if (priv->bitrate_max && dbt.bitrate > priv->bitrate_max) {
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netdev_err(dev, "canfd data bitrate surpasses transceiver capabilities of %d bps\n",
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priv->bitrate_max);
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return -EINVAL;
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}
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memset(&priv->tdc, 0, sizeof(priv->tdc));
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if (data[IFLA_CAN_TDC]) {
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/* TDC parameters are provided: use them */
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err = can_tdc_changelink(priv, data[IFLA_CAN_TDC],
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extack);
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if (err) {
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priv->ctrlmode &= ~CAN_CTRLMODE_TDC_MASK;
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return err;
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}
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} else if (!tdc_mask) {
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/* Neither of TDC parameters nor TDC flags are
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* provided: do calculation
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*/
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can_calc_tdco(&priv->tdc, priv->tdc_const, &priv->data_bittiming,
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&priv->ctrlmode, priv->ctrlmode_supported);
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} /* else: both CAN_CTRLMODE_TDC_{AUTO,MANUAL} are explicitly
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* turned off. TDC is disabled: do nothing
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*/
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memcpy(&priv->data_bittiming, &dbt, sizeof(dbt));
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if (priv->do_set_data_bittiming) {
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/* Finally, set the bit-timing registers */
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err = priv->do_set_data_bittiming(dev);
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if (err)
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return err;
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}
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}
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if (data[IFLA_CAN_TERMINATION]) {
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const u16 termval = nla_get_u16(data[IFLA_CAN_TERMINATION]);
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const unsigned int num_term = priv->termination_const_cnt;
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unsigned int i;
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if (!priv->do_set_termination)
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return -EOPNOTSUPP;
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/* check whether given value is supported by the interface */
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for (i = 0; i < num_term; i++) {
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if (termval == priv->termination_const[i])
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break;
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}
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if (i >= num_term)
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return -EINVAL;
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/* Finally, set the termination value */
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err = priv->do_set_termination(dev, termval);
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if (err)
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return err;
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priv->termination = termval;
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}
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return 0;
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}
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static size_t can_tdc_get_size(const struct net_device *dev)
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{
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struct can_priv *priv = netdev_priv(dev);
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size_t size;
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if (!priv->tdc_const)
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return 0;
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size = nla_total_size(0); /* nest IFLA_CAN_TDC */
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if (priv->ctrlmode_supported & CAN_CTRLMODE_TDC_MANUAL) {
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size += nla_total_size(sizeof(u32)); /* IFLA_CAN_TDCV_MIN */
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size += nla_total_size(sizeof(u32)); /* IFLA_CAN_TDCV_MAX */
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}
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size += nla_total_size(sizeof(u32)); /* IFLA_CAN_TDCO_MIN */
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size += nla_total_size(sizeof(u32)); /* IFLA_CAN_TDCO_MAX */
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if (priv->tdc_const->tdcf_max) {
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size += nla_total_size(sizeof(u32)); /* IFLA_CAN_TDCF_MIN */
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size += nla_total_size(sizeof(u32)); /* IFLA_CAN_TDCF_MAX */
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}
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if (can_tdc_is_enabled(priv)) {
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if (priv->ctrlmode & CAN_CTRLMODE_TDC_MANUAL ||
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priv->do_get_auto_tdcv)
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size += nla_total_size(sizeof(u32)); /* IFLA_CAN_TDCV */
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size += nla_total_size(sizeof(u32)); /* IFLA_CAN_TDCO */
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if (priv->tdc_const->tdcf_max)
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size += nla_total_size(sizeof(u32)); /* IFLA_CAN_TDCF */
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}
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return size;
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}
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static size_t can_ctrlmode_ext_get_size(void)
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{
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return nla_total_size(0) + /* nest IFLA_CAN_CTRLMODE_EXT */
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nla_total_size(sizeof(u32)); /* IFLA_CAN_CTRLMODE_SUPPORTED */
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}
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static size_t can_get_size(const struct net_device *dev)
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{
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struct can_priv *priv = netdev_priv(dev);
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size_t size = 0;
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if (priv->bittiming.bitrate) /* IFLA_CAN_BITTIMING */
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size += nla_total_size(sizeof(struct can_bittiming));
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if (priv->bittiming_const) /* IFLA_CAN_BITTIMING_CONST */
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size += nla_total_size(sizeof(struct can_bittiming_const));
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size += nla_total_size(sizeof(struct can_clock)); /* IFLA_CAN_CLOCK */
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size += nla_total_size(sizeof(u32)); /* IFLA_CAN_STATE */
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size += nla_total_size(sizeof(struct can_ctrlmode)); /* IFLA_CAN_CTRLMODE */
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size += nla_total_size(sizeof(u32)); /* IFLA_CAN_RESTART_MS */
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if (priv->do_get_berr_counter) /* IFLA_CAN_BERR_COUNTER */
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size += nla_total_size(sizeof(struct can_berr_counter));
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if (priv->data_bittiming.bitrate) /* IFLA_CAN_DATA_BITTIMING */
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size += nla_total_size(sizeof(struct can_bittiming));
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if (priv->data_bittiming_const) /* IFLA_CAN_DATA_BITTIMING_CONST */
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size += nla_total_size(sizeof(struct can_bittiming_const));
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if (priv->termination_const) {
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size += nla_total_size(sizeof(priv->termination)); /* IFLA_CAN_TERMINATION */
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size += nla_total_size(sizeof(*priv->termination_const) * /* IFLA_CAN_TERMINATION_CONST */
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priv->termination_const_cnt);
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}
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if (priv->bitrate_const) /* IFLA_CAN_BITRATE_CONST */
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size += nla_total_size(sizeof(*priv->bitrate_const) *
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priv->bitrate_const_cnt);
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if (priv->data_bitrate_const) /* IFLA_CAN_DATA_BITRATE_CONST */
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size += nla_total_size(sizeof(*priv->data_bitrate_const) *
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priv->data_bitrate_const_cnt);
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size += sizeof(priv->bitrate_max); /* IFLA_CAN_BITRATE_MAX */
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size += can_tdc_get_size(dev); /* IFLA_CAN_TDC */
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size += can_ctrlmode_ext_get_size(); /* IFLA_CAN_CTRLMODE_EXT */
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return size;
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}
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static int can_tdc_fill_info(struct sk_buff *skb, const struct net_device *dev)
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{
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struct nlattr *nest;
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struct can_priv *priv = netdev_priv(dev);
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struct can_tdc *tdc = &priv->tdc;
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const struct can_tdc_const *tdc_const = priv->tdc_const;
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if (!tdc_const)
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return 0;
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nest = nla_nest_start(skb, IFLA_CAN_TDC);
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if (!nest)
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return -EMSGSIZE;
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if (priv->ctrlmode_supported & CAN_CTRLMODE_TDC_MANUAL &&
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(nla_put_u32(skb, IFLA_CAN_TDC_TDCV_MIN, tdc_const->tdcv_min) ||
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nla_put_u32(skb, IFLA_CAN_TDC_TDCV_MAX, tdc_const->tdcv_max)))
|
|
goto err_cancel;
|
|
if (nla_put_u32(skb, IFLA_CAN_TDC_TDCO_MIN, tdc_const->tdco_min) ||
|
|
nla_put_u32(skb, IFLA_CAN_TDC_TDCO_MAX, tdc_const->tdco_max))
|
|
goto err_cancel;
|
|
if (tdc_const->tdcf_max &&
|
|
(nla_put_u32(skb, IFLA_CAN_TDC_TDCF_MIN, tdc_const->tdcf_min) ||
|
|
nla_put_u32(skb, IFLA_CAN_TDC_TDCF_MAX, tdc_const->tdcf_max)))
|
|
goto err_cancel;
|
|
|
|
if (can_tdc_is_enabled(priv)) {
|
|
u32 tdcv;
|
|
int err = -EINVAL;
|
|
|
|
if (priv->ctrlmode & CAN_CTRLMODE_TDC_MANUAL) {
|
|
tdcv = tdc->tdcv;
|
|
err = 0;
|
|
} else if (priv->do_get_auto_tdcv) {
|
|
err = priv->do_get_auto_tdcv(dev, &tdcv);
|
|
}
|
|
if (!err && nla_put_u32(skb, IFLA_CAN_TDC_TDCV, tdcv))
|
|
goto err_cancel;
|
|
if (nla_put_u32(skb, IFLA_CAN_TDC_TDCO, tdc->tdco))
|
|
goto err_cancel;
|
|
if (tdc_const->tdcf_max &&
|
|
nla_put_u32(skb, IFLA_CAN_TDC_TDCF, tdc->tdcf))
|
|
goto err_cancel;
|
|
}
|
|
|
|
nla_nest_end(skb, nest);
|
|
return 0;
|
|
|
|
err_cancel:
|
|
nla_nest_cancel(skb, nest);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static int can_ctrlmode_ext_fill_info(struct sk_buff *skb,
|
|
const struct can_priv *priv)
|
|
{
|
|
struct nlattr *nest;
|
|
|
|
nest = nla_nest_start(skb, IFLA_CAN_CTRLMODE_EXT);
|
|
if (!nest)
|
|
return -EMSGSIZE;
|
|
|
|
if (nla_put_u32(skb, IFLA_CAN_CTRLMODE_SUPPORTED,
|
|
priv->ctrlmode_supported)) {
|
|
nla_nest_cancel(skb, nest);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
nla_nest_end(skb, nest);
|
|
return 0;
|
|
}
|
|
|
|
static int can_fill_info(struct sk_buff *skb, const struct net_device *dev)
|
|
{
|
|
struct can_priv *priv = netdev_priv(dev);
|
|
struct can_ctrlmode cm = {.flags = priv->ctrlmode};
|
|
struct can_berr_counter bec = { };
|
|
enum can_state state = priv->state;
|
|
|
|
if (priv->do_get_state)
|
|
priv->do_get_state(dev, &state);
|
|
|
|
if ((priv->bittiming.bitrate != CAN_BITRATE_UNSET &&
|
|
priv->bittiming.bitrate != CAN_BITRATE_UNKNOWN &&
|
|
nla_put(skb, IFLA_CAN_BITTIMING,
|
|
sizeof(priv->bittiming), &priv->bittiming)) ||
|
|
|
|
(priv->bittiming_const &&
|
|
nla_put(skb, IFLA_CAN_BITTIMING_CONST,
|
|
sizeof(*priv->bittiming_const), priv->bittiming_const)) ||
|
|
|
|
nla_put(skb, IFLA_CAN_CLOCK, sizeof(priv->clock), &priv->clock) ||
|
|
nla_put_u32(skb, IFLA_CAN_STATE, state) ||
|
|
nla_put(skb, IFLA_CAN_CTRLMODE, sizeof(cm), &cm) ||
|
|
nla_put_u32(skb, IFLA_CAN_RESTART_MS, priv->restart_ms) ||
|
|
|
|
(priv->do_get_berr_counter &&
|
|
!priv->do_get_berr_counter(dev, &bec) &&
|
|
nla_put(skb, IFLA_CAN_BERR_COUNTER, sizeof(bec), &bec)) ||
|
|
|
|
(priv->data_bittiming.bitrate &&
|
|
nla_put(skb, IFLA_CAN_DATA_BITTIMING,
|
|
sizeof(priv->data_bittiming), &priv->data_bittiming)) ||
|
|
|
|
(priv->data_bittiming_const &&
|
|
nla_put(skb, IFLA_CAN_DATA_BITTIMING_CONST,
|
|
sizeof(*priv->data_bittiming_const),
|
|
priv->data_bittiming_const)) ||
|
|
|
|
(priv->termination_const &&
|
|
(nla_put_u16(skb, IFLA_CAN_TERMINATION, priv->termination) ||
|
|
nla_put(skb, IFLA_CAN_TERMINATION_CONST,
|
|
sizeof(*priv->termination_const) *
|
|
priv->termination_const_cnt,
|
|
priv->termination_const))) ||
|
|
|
|
(priv->bitrate_const &&
|
|
nla_put(skb, IFLA_CAN_BITRATE_CONST,
|
|
sizeof(*priv->bitrate_const) *
|
|
priv->bitrate_const_cnt,
|
|
priv->bitrate_const)) ||
|
|
|
|
(priv->data_bitrate_const &&
|
|
nla_put(skb, IFLA_CAN_DATA_BITRATE_CONST,
|
|
sizeof(*priv->data_bitrate_const) *
|
|
priv->data_bitrate_const_cnt,
|
|
priv->data_bitrate_const)) ||
|
|
|
|
(nla_put(skb, IFLA_CAN_BITRATE_MAX,
|
|
sizeof(priv->bitrate_max),
|
|
&priv->bitrate_max)) ||
|
|
|
|
can_tdc_fill_info(skb, dev) ||
|
|
|
|
can_ctrlmode_ext_fill_info(skb, priv)
|
|
)
|
|
|
|
return -EMSGSIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static size_t can_get_xstats_size(const struct net_device *dev)
|
|
{
|
|
return sizeof(struct can_device_stats);
|
|
}
|
|
|
|
static int can_fill_xstats(struct sk_buff *skb, const struct net_device *dev)
|
|
{
|
|
struct can_priv *priv = netdev_priv(dev);
|
|
|
|
if (nla_put(skb, IFLA_INFO_XSTATS,
|
|
sizeof(priv->can_stats), &priv->can_stats))
|
|
goto nla_put_failure;
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static int can_newlink(struct net *src_net, struct net_device *dev,
|
|
struct nlattr *tb[], struct nlattr *data[],
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static void can_dellink(struct net_device *dev, struct list_head *head)
|
|
{
|
|
}
|
|
|
|
struct rtnl_link_ops can_link_ops __read_mostly = {
|
|
.kind = "can",
|
|
.netns_refund = true,
|
|
.maxtype = IFLA_CAN_MAX,
|
|
.policy = can_policy,
|
|
.setup = can_setup,
|
|
.validate = can_validate,
|
|
.newlink = can_newlink,
|
|
.changelink = can_changelink,
|
|
.dellink = can_dellink,
|
|
.get_size = can_get_size,
|
|
.fill_info = can_fill_info,
|
|
.get_xstats_size = can_get_xstats_size,
|
|
.fill_xstats = can_fill_xstats,
|
|
};
|
|
|
|
int can_netlink_register(void)
|
|
{
|
|
return rtnl_link_register(&can_link_ops);
|
|
}
|
|
|
|
void can_netlink_unregister(void)
|
|
{
|
|
rtnl_link_unregister(&can_link_ops);
|
|
}
|