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363 lines
11 KiB
363 lines
11 KiB
// 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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