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- // SPDX-License-Identifier: GPL-2.0-only
- #include "netlink.h"
- #include "common.h"
- struct linkinfo_req_info {
- struct ethnl_req_info base;
- };
- struct linkinfo_reply_data {
- struct ethnl_reply_data base;
- struct ethtool_link_ksettings ksettings;
- struct ethtool_link_settings *lsettings;
- };
- #define LINKINFO_REPDATA(__reply_base) \
- container_of(__reply_base, struct linkinfo_reply_data, base)
- const struct nla_policy ethnl_linkinfo_get_policy[] = {
- [ETHTOOL_A_LINKINFO_HEADER] =
- NLA_POLICY_NESTED(ethnl_header_policy),
- };
- static int linkinfo_prepare_data(const struct ethnl_req_info *req_base,
- struct ethnl_reply_data *reply_base,
- struct genl_info *info)
- {
- struct linkinfo_reply_data *data = LINKINFO_REPDATA(reply_base);
- struct net_device *dev = reply_base->dev;
- int ret;
- data->lsettings = &data->ksettings.base;
- ret = ethnl_ops_begin(dev);
- if (ret < 0)
- return ret;
- ret = __ethtool_get_link_ksettings(dev, &data->ksettings);
- if (ret < 0 && info)
- GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
- ethnl_ops_complete(dev);
- return ret;
- }
- static int linkinfo_reply_size(const struct ethnl_req_info *req_base,
- const struct ethnl_reply_data *reply_base)
- {
- return nla_total_size(sizeof(u8)) /* LINKINFO_PORT */
- + nla_total_size(sizeof(u8)) /* LINKINFO_PHYADDR */
- + nla_total_size(sizeof(u8)) /* LINKINFO_TP_MDIX */
- + nla_total_size(sizeof(u8)) /* LINKINFO_TP_MDIX_CTRL */
- + nla_total_size(sizeof(u8)) /* LINKINFO_TRANSCEIVER */
- + 0;
- }
- static int linkinfo_fill_reply(struct sk_buff *skb,
- const struct ethnl_req_info *req_base,
- const struct ethnl_reply_data *reply_base)
- {
- const struct linkinfo_reply_data *data = LINKINFO_REPDATA(reply_base);
- if (nla_put_u8(skb, ETHTOOL_A_LINKINFO_PORT, data->lsettings->port) ||
- nla_put_u8(skb, ETHTOOL_A_LINKINFO_PHYADDR,
- data->lsettings->phy_address) ||
- nla_put_u8(skb, ETHTOOL_A_LINKINFO_TP_MDIX,
- data->lsettings->eth_tp_mdix) ||
- nla_put_u8(skb, ETHTOOL_A_LINKINFO_TP_MDIX_CTRL,
- data->lsettings->eth_tp_mdix_ctrl) ||
- nla_put_u8(skb, ETHTOOL_A_LINKINFO_TRANSCEIVER,
- data->lsettings->transceiver))
- return -EMSGSIZE;
- return 0;
- }
- const struct ethnl_request_ops ethnl_linkinfo_request_ops = {
- .request_cmd = ETHTOOL_MSG_LINKINFO_GET,
- .reply_cmd = ETHTOOL_MSG_LINKINFO_GET_REPLY,
- .hdr_attr = ETHTOOL_A_LINKINFO_HEADER,
- .req_info_size = sizeof(struct linkinfo_req_info),
- .reply_data_size = sizeof(struct linkinfo_reply_data),
- .prepare_data = linkinfo_prepare_data,
- .reply_size = linkinfo_reply_size,
- .fill_reply = linkinfo_fill_reply,
- };
- /* LINKINFO_SET */
- const struct nla_policy ethnl_linkinfo_set_policy[] = {
- [ETHTOOL_A_LINKINFO_HEADER] =
- NLA_POLICY_NESTED(ethnl_header_policy),
- [ETHTOOL_A_LINKINFO_PORT] = { .type = NLA_U8 },
- [ETHTOOL_A_LINKINFO_PHYADDR] = { .type = NLA_U8 },
- [ETHTOOL_A_LINKINFO_TP_MDIX_CTRL] = { .type = NLA_U8 },
- };
- int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info)
- {
- struct ethtool_link_ksettings ksettings = {};
- struct ethtool_link_settings *lsettings;
- struct ethnl_req_info req_info = {};
- struct nlattr **tb = info->attrs;
- struct net_device *dev;
- bool mod = false;
- int ret;
- ret = ethnl_parse_header_dev_get(&req_info,
- tb[ETHTOOL_A_LINKINFO_HEADER],
- genl_info_net(info), info->extack,
- true);
- if (ret < 0)
- return ret;
- dev = req_info.dev;
- ret = -EOPNOTSUPP;
- if (!dev->ethtool_ops->get_link_ksettings ||
- !dev->ethtool_ops->set_link_ksettings)
- goto out_dev;
- rtnl_lock();
- ret = ethnl_ops_begin(dev);
- if (ret < 0)
- goto out_rtnl;
- ret = __ethtool_get_link_ksettings(dev, &ksettings);
- if (ret < 0) {
- GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
- goto out_ops;
- }
- lsettings = &ksettings.base;
- ethnl_update_u8(&lsettings->port, tb[ETHTOOL_A_LINKINFO_PORT], &mod);
- ethnl_update_u8(&lsettings->phy_address, tb[ETHTOOL_A_LINKINFO_PHYADDR],
- &mod);
- ethnl_update_u8(&lsettings->eth_tp_mdix_ctrl,
- tb[ETHTOOL_A_LINKINFO_TP_MDIX_CTRL], &mod);
- ret = 0;
- if (!mod)
- goto out_ops;
- ret = dev->ethtool_ops->set_link_ksettings(dev, &ksettings);
- if (ret < 0)
- GENL_SET_ERR_MSG(info, "link settings update failed");
- else
- ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
- out_ops:
- ethnl_ops_complete(dev);
- out_rtnl:
- rtnl_unlock();
- out_dev:
- ethnl_parse_header_dev_put(&req_info);
- return ret;
- }
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