// SPDX-License-Identifier: GPL-2.0-only #include <linux/phy.h>#include <linux/phylib_stubs.h> #include "common.h"#include "netlink.h" struct linkstate_req_info {	struct ethnl_req_info		base;}; struct linkstate_reply_data {	struct ethnl_reply_data			base;	int					link;	int					sqi;	int					sqi_max;	struct ethtool_link_ext_stats		link_stats;	bool					link_ext_state_provided;	struct ethtool_link_ext_state_info	ethtool_link_ext_state_info;}; #define LINKSTATE_REPDATA(__reply_base) \	container_of(__reply_base, struct linkstate_reply_data, base) const struct nla_policy ethnl_linkstate_get_policy[] = {	[ETHTOOL_A_LINKSTATE_HEADER]		=		NLA_POLICY_NESTED(ethnl_header_policy_stats),}; static int linkstate_get_sqi(struct phy_device *phydev){	int ret; 	if (!phydev)		return -EOPNOTSUPP; 	mutex_lock(&phydev->lock);	if (!phydev->drv || !phydev->drv->get_sqi)		ret = -EOPNOTSUPP;	else if (!phydev->link)		ret = -ENETDOWN;	else		ret = phydev->drv->get_sqi(phydev);	mutex_unlock(&phydev->lock); 	return ret;} static int linkstate_get_sqi_max(struct phy_device *phydev){	int ret; 	if (!phydev)		return -EOPNOTSUPP; 	mutex_lock(&phydev->lock);	if (!phydev->drv || !phydev->drv->get_sqi_max)		ret = -EOPNOTSUPP;	else if (!phydev->link)		ret = -ENETDOWN;	else		ret = phydev->drv->get_sqi_max(phydev);	mutex_unlock(&phydev->lock); 	return ret;}; static bool linkstate_sqi_critical_error(int sqi){	return sqi < 0 && sqi != -EOPNOTSUPP && sqi != -ENETDOWN;} static bool linkstate_sqi_valid(struct linkstate_reply_data *data){	return data->sqi >= 0 && data->sqi_max >= 0 &&	       data->sqi <= data->sqi_max;} static int linkstate_get_link_ext_state(struct net_device *dev,					struct linkstate_reply_data *data){	int err; 	if (!dev->ethtool_ops->get_link_ext_state)		return -EOPNOTSUPP; 	err = dev->ethtool_ops->get_link_ext_state(dev, &data->ethtool_link_ext_state_info);	if (err)		return err; 	data->link_ext_state_provided = true; 	return 0;} static int linkstate_prepare_data(const struct ethnl_req_info *req_base,				  struct ethnl_reply_data *reply_base,				  const struct genl_info *info){	struct linkstate_reply_data *data = LINKSTATE_REPDATA(reply_base);	struct net_device *dev = reply_base->dev;	struct nlattr **tb = info->attrs;	struct phy_device *phydev;	int ret; 	phydev = ethnl_req_get_phydev(req_base, tb, ETHTOOL_A_LINKSTATE_HEADER,				      info->extack);	if (IS_ERR(phydev))		return PTR_ERR(phydev); 	ret = ethnl_ops_begin(dev);	if (ret < 0)		return ret;	data->link = __ethtool_get_link(dev); 	ret = linkstate_get_sqi(phydev);	if (linkstate_sqi_critical_error(ret))		goto out;	data->sqi = ret; 	ret = linkstate_get_sqi_max(phydev);	if (linkstate_sqi_critical_error(ret))		goto out;	data->sqi_max = ret; 	if (dev->flags & IFF_UP) {		ret = linkstate_get_link_ext_state(dev, data);		if (ret < 0 && ret != -EOPNOTSUPP && ret != -ENODATA)			goto out;	} 	ethtool_stats_init((u64 *)&data->link_stats,			   sizeof(data->link_stats) / 8); 	if (req_base->flags & ETHTOOL_FLAG_STATS) {		if (phydev)			phy_ethtool_get_link_ext_stats(phydev,						       &data->link_stats); 		if (dev->ethtool_ops->get_link_ext_stats)			dev->ethtool_ops->get_link_ext_stats(dev,							     &data->link_stats);	} 	ret = 0;out:	ethnl_ops_complete(dev);	return ret;} static int linkstate_reply_size(const struct ethnl_req_info *req_base,				const struct ethnl_reply_data *reply_base){	struct linkstate_reply_data *data = LINKSTATE_REPDATA(reply_base);	int len; 	len = nla_total_size(sizeof(u8)) /* LINKSTATE_LINK */		+ 0; 	if (linkstate_sqi_valid(data)) {		len += nla_total_size(sizeof(u32)); /* LINKSTATE_SQI */		len += nla_total_size(sizeof(u32)); /* LINKSTATE_SQI_MAX */	} 	if (data->link_ext_state_provided)		len += nla_total_size(sizeof(u8)); /* LINKSTATE_EXT_STATE */ 	if (data->ethtool_link_ext_state_info.__link_ext_substate)		len += nla_total_size(sizeof(u8)); /* LINKSTATE_EXT_SUBSTATE */ 	if (data->link_stats.link_down_events != ETHTOOL_STAT_NOT_SET)		len += nla_total_size(sizeof(u32)); 	return len;} static int linkstate_fill_reply(struct sk_buff *skb,				const struct ethnl_req_info *req_base,				const struct ethnl_reply_data *reply_base){	struct linkstate_reply_data *data = LINKSTATE_REPDATA(reply_base); 	if (data->link >= 0 &&	    nla_put_u8(skb, ETHTOOL_A_LINKSTATE_LINK, !!data->link))		return -EMSGSIZE; 	if (linkstate_sqi_valid(data)) {		if (nla_put_u32(skb, ETHTOOL_A_LINKSTATE_SQI, data->sqi))			return -EMSGSIZE; 		if (nla_put_u32(skb, ETHTOOL_A_LINKSTATE_SQI_MAX,				data->sqi_max))			return -EMSGSIZE;	} 	if (data->link_ext_state_provided) {		if (nla_put_u8(skb, ETHTOOL_A_LINKSTATE_EXT_STATE,			       data->ethtool_link_ext_state_info.link_ext_state))			return -EMSGSIZE; 		if (data->ethtool_link_ext_state_info.__link_ext_substate &&		    nla_put_u8(skb, ETHTOOL_A_LINKSTATE_EXT_SUBSTATE,			       data->ethtool_link_ext_state_info.__link_ext_substate))			return -EMSGSIZE;	} 	if (data->link_stats.link_down_events != ETHTOOL_STAT_NOT_SET)		if (nla_put_u32(skb, ETHTOOL_A_LINKSTATE_EXT_DOWN_CNT,				data->link_stats.link_down_events))			return -EMSGSIZE; 	return 0;} const struct ethnl_request_ops ethnl_linkstate_request_ops = {	.request_cmd		= ETHTOOL_MSG_LINKSTATE_GET,	.reply_cmd		= ETHTOOL_MSG_LINKSTATE_GET_REPLY,	.hdr_attr		= ETHTOOL_A_LINKSTATE_HEADER,	.req_info_size		= sizeof(struct linkstate_req_info),	.reply_data_size	= sizeof(struct linkstate_reply_data), 	.prepare_data		= linkstate_prepare_data,	.reply_size		= linkstate_reply_size,	.fill_reply		= linkstate_fill_reply,};