Orange Pi5 kernel

// 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:
<------>dev_put(dev);
<------>return ret;
}