364 lines
11 KiB
C
364 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include "netlink.h"
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#include "common.h"
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#include "bitset.h"
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/* LINKMODES_GET */
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struct linkmodes_req_info {
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struct ethnl_req_info base;
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};
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struct linkmodes_reply_data {
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struct ethnl_reply_data base;
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struct ethtool_link_ksettings ksettings;
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struct ethtool_link_settings *lsettings;
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bool peer_empty;
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};
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#define LINKMODES_REPDATA(__reply_base) \
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container_of(__reply_base, struct linkmodes_reply_data, base)
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const struct nla_policy ethnl_linkmodes_get_policy[] = {
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[ETHTOOL_A_LINKMODES_HEADER] =
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NLA_POLICY_NESTED(ethnl_header_policy),
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};
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static int linkmodes_prepare_data(const struct ethnl_req_info *req_base,
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struct ethnl_reply_data *reply_base,
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struct genl_info *info)
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{
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struct linkmodes_reply_data *data = LINKMODES_REPDATA(reply_base);
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struct net_device *dev = reply_base->dev;
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int ret;
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data->lsettings = &data->ksettings.base;
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ret = ethnl_ops_begin(dev);
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if (ret < 0)
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return ret;
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ret = __ethtool_get_link_ksettings(dev, &data->ksettings);
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if (ret < 0 && info) {
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GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
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goto out;
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}
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if (!dev->ethtool_ops->cap_link_lanes_supported)
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data->ksettings.lanes = 0;
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data->peer_empty =
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bitmap_empty(data->ksettings.link_modes.lp_advertising,
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__ETHTOOL_LINK_MODE_MASK_NBITS);
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out:
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ethnl_ops_complete(dev);
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return ret;
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}
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static int linkmodes_reply_size(const struct ethnl_req_info *req_base,
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const struct ethnl_reply_data *reply_base)
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{
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const struct linkmodes_reply_data *data = LINKMODES_REPDATA(reply_base);
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const struct ethtool_link_ksettings *ksettings = &data->ksettings;
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const struct ethtool_link_settings *lsettings = &ksettings->base;
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bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
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int len, ret;
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len = nla_total_size(sizeof(u8)) /* LINKMODES_AUTONEG */
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+ nla_total_size(sizeof(u32)) /* LINKMODES_SPEED */
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+ nla_total_size(sizeof(u32)) /* LINKMODES_LANES */
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+ nla_total_size(sizeof(u8)) /* LINKMODES_DUPLEX */
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+ 0;
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ret = ethnl_bitset_size(ksettings->link_modes.advertising,
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ksettings->link_modes.supported,
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__ETHTOOL_LINK_MODE_MASK_NBITS,
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link_mode_names, compact);
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if (ret < 0)
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return ret;
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len += ret;
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if (!data->peer_empty) {
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ret = ethnl_bitset_size(ksettings->link_modes.lp_advertising,
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NULL, __ETHTOOL_LINK_MODE_MASK_NBITS,
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link_mode_names, compact);
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if (ret < 0)
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return ret;
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len += ret;
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}
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if (lsettings->master_slave_cfg != MASTER_SLAVE_CFG_UNSUPPORTED)
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len += nla_total_size(sizeof(u8));
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if (lsettings->master_slave_state != MASTER_SLAVE_STATE_UNSUPPORTED)
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len += nla_total_size(sizeof(u8));
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return len;
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}
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static int linkmodes_fill_reply(struct sk_buff *skb,
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const struct ethnl_req_info *req_base,
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const struct ethnl_reply_data *reply_base)
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{
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const struct linkmodes_reply_data *data = LINKMODES_REPDATA(reply_base);
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const struct ethtool_link_ksettings *ksettings = &data->ksettings;
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const struct ethtool_link_settings *lsettings = &ksettings->base;
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bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
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int ret;
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if (nla_put_u8(skb, ETHTOOL_A_LINKMODES_AUTONEG, lsettings->autoneg))
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return -EMSGSIZE;
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ret = ethnl_put_bitset(skb, ETHTOOL_A_LINKMODES_OURS,
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ksettings->link_modes.advertising,
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ksettings->link_modes.supported,
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__ETHTOOL_LINK_MODE_MASK_NBITS, link_mode_names,
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compact);
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if (ret < 0)
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return -EMSGSIZE;
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if (!data->peer_empty) {
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ret = ethnl_put_bitset(skb, ETHTOOL_A_LINKMODES_PEER,
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ksettings->link_modes.lp_advertising,
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NULL, __ETHTOOL_LINK_MODE_MASK_NBITS,
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link_mode_names, compact);
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if (ret < 0)
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return -EMSGSIZE;
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}
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if (nla_put_u32(skb, ETHTOOL_A_LINKMODES_SPEED, lsettings->speed) ||
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nla_put_u8(skb, ETHTOOL_A_LINKMODES_DUPLEX, lsettings->duplex))
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return -EMSGSIZE;
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if (ksettings->lanes &&
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nla_put_u32(skb, ETHTOOL_A_LINKMODES_LANES, ksettings->lanes))
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return -EMSGSIZE;
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if (lsettings->master_slave_cfg != MASTER_SLAVE_CFG_UNSUPPORTED &&
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nla_put_u8(skb, ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG,
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lsettings->master_slave_cfg))
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return -EMSGSIZE;
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if (lsettings->master_slave_state != MASTER_SLAVE_STATE_UNSUPPORTED &&
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nla_put_u8(skb, ETHTOOL_A_LINKMODES_MASTER_SLAVE_STATE,
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lsettings->master_slave_state))
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return -EMSGSIZE;
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return 0;
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}
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const struct ethnl_request_ops ethnl_linkmodes_request_ops = {
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.request_cmd = ETHTOOL_MSG_LINKMODES_GET,
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.reply_cmd = ETHTOOL_MSG_LINKMODES_GET_REPLY,
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.hdr_attr = ETHTOOL_A_LINKMODES_HEADER,
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.req_info_size = sizeof(struct linkmodes_req_info),
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.reply_data_size = sizeof(struct linkmodes_reply_data),
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.prepare_data = linkmodes_prepare_data,
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.reply_size = linkmodes_reply_size,
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.fill_reply = linkmodes_fill_reply,
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};
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/* LINKMODES_SET */
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const struct nla_policy ethnl_linkmodes_set_policy[] = {
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[ETHTOOL_A_LINKMODES_HEADER] =
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NLA_POLICY_NESTED(ethnl_header_policy),
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[ETHTOOL_A_LINKMODES_AUTONEG] = { .type = NLA_U8 },
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[ETHTOOL_A_LINKMODES_OURS] = { .type = NLA_NESTED },
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[ETHTOOL_A_LINKMODES_SPEED] = { .type = NLA_U32 },
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[ETHTOOL_A_LINKMODES_DUPLEX] = { .type = NLA_U8 },
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[ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG] = { .type = NLA_U8 },
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[ETHTOOL_A_LINKMODES_LANES] = NLA_POLICY_RANGE(NLA_U32, 1, 8),
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};
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/* Set advertised link modes to all supported modes matching requested speed,
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* lanes and duplex values. Called when autonegotiation is on, speed, lanes or
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* duplex is requested but no link mode change. This is done in userspace with
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* ioctl() interface, move it into kernel for netlink.
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* Returns true if advertised modes bitmap was modified.
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*/
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static bool ethnl_auto_linkmodes(struct ethtool_link_ksettings *ksettings,
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bool req_speed, bool req_lanes, bool req_duplex)
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{
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unsigned long *advertising = ksettings->link_modes.advertising;
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unsigned long *supported = ksettings->link_modes.supported;
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DECLARE_BITMAP(old_adv, __ETHTOOL_LINK_MODE_MASK_NBITS);
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unsigned int i;
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bitmap_copy(old_adv, advertising, __ETHTOOL_LINK_MODE_MASK_NBITS);
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for (i = 0; i < __ETHTOOL_LINK_MODE_MASK_NBITS; i++) {
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const struct link_mode_info *info = &link_mode_params[i];
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if (info->speed == SPEED_UNKNOWN)
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continue;
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if (test_bit(i, supported) &&
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(!req_speed || info->speed == ksettings->base.speed) &&
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(!req_lanes || info->lanes == ksettings->lanes) &&
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(!req_duplex || info->duplex == ksettings->base.duplex))
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set_bit(i, advertising);
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else
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clear_bit(i, advertising);
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}
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return !bitmap_equal(old_adv, advertising,
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__ETHTOOL_LINK_MODE_MASK_NBITS);
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}
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static bool ethnl_validate_master_slave_cfg(u8 cfg)
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{
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switch (cfg) {
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case MASTER_SLAVE_CFG_MASTER_PREFERRED:
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case MASTER_SLAVE_CFG_SLAVE_PREFERRED:
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case MASTER_SLAVE_CFG_MASTER_FORCE:
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case MASTER_SLAVE_CFG_SLAVE_FORCE:
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return true;
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}
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return false;
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}
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static int ethnl_check_linkmodes(struct genl_info *info, struct nlattr **tb)
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{
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const struct nlattr *master_slave_cfg, *lanes_cfg;
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master_slave_cfg = tb[ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG];
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if (master_slave_cfg &&
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!ethnl_validate_master_slave_cfg(nla_get_u8(master_slave_cfg))) {
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NL_SET_ERR_MSG_ATTR(info->extack, master_slave_cfg,
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"master/slave value is invalid");
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return -EOPNOTSUPP;
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}
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lanes_cfg = tb[ETHTOOL_A_LINKMODES_LANES];
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if (lanes_cfg && !is_power_of_2(nla_get_u32(lanes_cfg))) {
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NL_SET_ERR_MSG_ATTR(info->extack, lanes_cfg,
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"lanes value is invalid");
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return -EINVAL;
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}
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return 0;
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}
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static int ethnl_update_linkmodes(struct genl_info *info, struct nlattr **tb,
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struct ethtool_link_ksettings *ksettings,
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bool *mod, const struct net_device *dev)
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{
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struct ethtool_link_settings *lsettings = &ksettings->base;
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bool req_speed, req_lanes, req_duplex;
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const struct nlattr *master_slave_cfg, *lanes_cfg;
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int ret;
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master_slave_cfg = tb[ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG];
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if (master_slave_cfg) {
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if (lsettings->master_slave_cfg == MASTER_SLAVE_CFG_UNSUPPORTED) {
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NL_SET_ERR_MSG_ATTR(info->extack, master_slave_cfg,
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"master/slave configuration not supported by device");
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return -EOPNOTSUPP;
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}
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}
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*mod = false;
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req_speed = tb[ETHTOOL_A_LINKMODES_SPEED];
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req_lanes = tb[ETHTOOL_A_LINKMODES_LANES];
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req_duplex = tb[ETHTOOL_A_LINKMODES_DUPLEX];
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ethnl_update_u8(&lsettings->autoneg, tb[ETHTOOL_A_LINKMODES_AUTONEG],
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mod);
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lanes_cfg = tb[ETHTOOL_A_LINKMODES_LANES];
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if (lanes_cfg) {
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/* If autoneg is off and lanes parameter is not supported by the
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* driver, return an error.
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*/
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if (!lsettings->autoneg &&
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!dev->ethtool_ops->cap_link_lanes_supported) {
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NL_SET_ERR_MSG_ATTR(info->extack, lanes_cfg,
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"lanes configuration not supported by device");
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return -EOPNOTSUPP;
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}
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} else if (!lsettings->autoneg) {
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/* If autoneg is off and lanes parameter is not passed from user,
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* set the lanes parameter to 0.
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*/
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ksettings->lanes = 0;
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}
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ret = ethnl_update_bitset(ksettings->link_modes.advertising,
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__ETHTOOL_LINK_MODE_MASK_NBITS,
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tb[ETHTOOL_A_LINKMODES_OURS], link_mode_names,
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info->extack, mod);
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if (ret < 0)
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return ret;
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ethnl_update_u32(&lsettings->speed, tb[ETHTOOL_A_LINKMODES_SPEED],
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mod);
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ethnl_update_u32(&ksettings->lanes, lanes_cfg, mod);
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ethnl_update_u8(&lsettings->duplex, tb[ETHTOOL_A_LINKMODES_DUPLEX],
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mod);
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ethnl_update_u8(&lsettings->master_slave_cfg, master_slave_cfg, mod);
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if (!tb[ETHTOOL_A_LINKMODES_OURS] && lsettings->autoneg &&
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(req_speed || req_lanes || req_duplex) &&
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ethnl_auto_linkmodes(ksettings, req_speed, req_lanes, req_duplex))
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*mod = true;
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return 0;
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}
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int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info)
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{
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struct ethtool_link_ksettings ksettings = {};
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struct ethnl_req_info req_info = {};
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struct nlattr **tb = info->attrs;
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struct net_device *dev;
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bool mod = false;
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int ret;
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ret = ethnl_check_linkmodes(info, tb);
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if (ret < 0)
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return ret;
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ret = ethnl_parse_header_dev_get(&req_info,
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tb[ETHTOOL_A_LINKMODES_HEADER],
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genl_info_net(info), info->extack,
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true);
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if (ret < 0)
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return ret;
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dev = req_info.dev;
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ret = -EOPNOTSUPP;
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if (!dev->ethtool_ops->get_link_ksettings ||
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!dev->ethtool_ops->set_link_ksettings)
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goto out_dev;
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rtnl_lock();
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ret = ethnl_ops_begin(dev);
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if (ret < 0)
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goto out_rtnl;
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ret = __ethtool_get_link_ksettings(dev, &ksettings);
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if (ret < 0) {
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GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
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goto out_ops;
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}
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ret = ethnl_update_linkmodes(info, tb, &ksettings, &mod, dev);
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if (ret < 0)
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goto out_ops;
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if (mod) {
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ret = dev->ethtool_ops->set_link_ksettings(dev, &ksettings);
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if (ret < 0)
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GENL_SET_ERR_MSG(info, "link settings update failed");
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else
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ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
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}
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out_ops:
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ethnl_ops_complete(dev);
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out_rtnl:
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rtnl_unlock();
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out_dev:
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dev_put(dev);
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return ret;
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}
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