// SPDX-License-Identifier: GPL-2.0-only/* * Copyright 2023 Bootlin * */#include <linux/phy.h>#include <linux/phy_link_topology.h>#include <linux/sfp.h>#include <net/netdev_lock.h> #include "common.h"#include "netlink.h" struct phy_req_info {	struct ethnl_req_info base;}; struct phy_reply_data {	struct ethnl_reply_data	base;	u32 phyindex;	char *drvname;	char *name;	unsigned int upstream_type;	char *upstream_sfp_name;	unsigned int upstream_index;	char *downstream_sfp_name;}; #define PHY_REPDATA(__reply_base) \	container_of(__reply_base, struct phy_reply_data, base) const struct nla_policy ethnl_phy_get_policy[ETHTOOL_A_PHY_HEADER + 1] = {	[ETHTOOL_A_PHY_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),}; static int phy_reply_size(const struct ethnl_req_info *req_info,			  const struct ethnl_reply_data *reply_data){	struct phy_reply_data *rep_data = PHY_REPDATA(reply_data);	size_t size = 0; 	/* ETHTOOL_A_PHY_INDEX */	size += nla_total_size(sizeof(u32)); 	/* ETHTOOL_A_DRVNAME */	if (rep_data->drvname)		size += nla_total_size(strlen(rep_data->drvname) + 1); 	/* ETHTOOL_A_NAME */	size += nla_total_size(strlen(rep_data->name) + 1); 	/* ETHTOOL_A_PHY_UPSTREAM_TYPE */	size += nla_total_size(sizeof(u32)); 	/* ETHTOOL_A_PHY_UPSTREAM_SFP_NAME */	if (rep_data->upstream_sfp_name)		size += nla_total_size(strlen(rep_data->upstream_sfp_name) + 1); 	/* ETHTOOL_A_PHY_UPSTREAM_INDEX */	if (rep_data->upstream_index)		size += nla_total_size(sizeof(u32)); 	/* ETHTOOL_A_PHY_DOWNSTREAM_SFP_NAME */	if (rep_data->downstream_sfp_name)		size += nla_total_size(strlen(rep_data->downstream_sfp_name) + 1); 	return size;} static int phy_prepare_data(const struct ethnl_req_info *req_info,			    struct ethnl_reply_data *reply_data,			    const struct genl_info *info){	struct phy_link_topology *topo = reply_data->dev->link_topo;	struct phy_reply_data *rep_data = PHY_REPDATA(reply_data);	struct nlattr **tb = info->attrs;	struct phy_device_node *pdn;	struct phy_device *phydev;	int ret; 	phydev = ethnl_req_get_phydev(req_info, tb, ETHTOOL_A_PHY_HEADER,				      info->extack);	if (IS_ERR_OR_NULL(phydev))		return -EOPNOTSUPP; 	pdn = xa_load(&topo->phys, phydev->phyindex);	if (!pdn)		return -EOPNOTSUPP; 	rep_data->phyindex = phydev->phyindex; 	rep_data->name = kstrdup(dev_name(&phydev->mdio.dev), GFP_KERNEL);	if (!rep_data->name)		return -ENOMEM; 	if (phydev->drv) {		rep_data->drvname = kstrdup(phydev->drv->name, GFP_KERNEL);		if (!rep_data->drvname) {			ret = -ENOMEM;			goto err_free_name;		}	} 	rep_data->upstream_type = pdn->upstream_type; 	if (pdn->upstream_type == PHY_UPSTREAM_PHY) {		struct phy_device *upstream = pdn->upstream.phydev;		rep_data->upstream_index = upstream->phyindex;	} 	if (pdn->parent_sfp_bus) {		rep_data->upstream_sfp_name = kstrdup(sfp_get_name(pdn->parent_sfp_bus),						      GFP_KERNEL);		if (!rep_data->upstream_sfp_name) {			ret = -ENOMEM;			goto err_free_drvname;		}	} 	if (phydev->sfp_bus) {		rep_data->downstream_sfp_name = kstrdup(sfp_get_name(phydev->sfp_bus),							GFP_KERNEL);		if (!rep_data->downstream_sfp_name) {			ret = -ENOMEM;			goto err_free_upstream_sfp;		}	} 	return 0; err_free_upstream_sfp:	kfree(rep_data->upstream_sfp_name);err_free_drvname:	kfree(rep_data->drvname);err_free_name:	kfree(rep_data->name);	return ret;} static int phy_fill_reply(struct sk_buff *skb,			  const struct ethnl_req_info *req_info,			  const struct ethnl_reply_data *reply_data){	struct phy_reply_data *rep_data = PHY_REPDATA(reply_data); 	if (nla_put_u32(skb, ETHTOOL_A_PHY_INDEX, rep_data->phyindex) ||	    nla_put_string(skb, ETHTOOL_A_PHY_NAME, rep_data->name) ||	    nla_put_u32(skb, ETHTOOL_A_PHY_UPSTREAM_TYPE, rep_data->upstream_type))		return -EMSGSIZE; 	if (rep_data->drvname &&	    nla_put_string(skb, ETHTOOL_A_PHY_DRVNAME, rep_data->drvname))		return -EMSGSIZE; 	if (rep_data->upstream_index &&	    nla_put_u32(skb, ETHTOOL_A_PHY_UPSTREAM_INDEX,			rep_data->upstream_index))		return -EMSGSIZE; 	if (rep_data->upstream_sfp_name &&	    nla_put_string(skb, ETHTOOL_A_PHY_UPSTREAM_SFP_NAME,			   rep_data->upstream_sfp_name))		return -EMSGSIZE; 	if (rep_data->downstream_sfp_name &&	    nla_put_string(skb, ETHTOOL_A_PHY_DOWNSTREAM_SFP_NAME,			   rep_data->downstream_sfp_name))		return -EMSGSIZE; 	return 0;} static void phy_cleanup_data(struct ethnl_reply_data *reply_data){	struct phy_reply_data *rep_data = PHY_REPDATA(reply_data); 	kfree(rep_data->drvname);	kfree(rep_data->name);	kfree(rep_data->upstream_sfp_name);	kfree(rep_data->downstream_sfp_name);} const struct ethnl_request_ops ethnl_phy_request_ops = {	.request_cmd		= ETHTOOL_MSG_PHY_GET,	.reply_cmd		= ETHTOOL_MSG_PHY_GET_REPLY,	.hdr_attr		= ETHTOOL_A_PHY_HEADER,	.req_info_size		= sizeof(struct phy_req_info),	.reply_data_size	= sizeof(struct phy_reply_data), 	.prepare_data		= phy_prepare_data,	.reply_size		= phy_reply_size,	.fill_reply		= phy_fill_reply,	.cleanup_data		= phy_cleanup_data,};