// SPDX-License-Identifier: GPL-2.0-only #include "bitset.h"#include "common.h"#include "netlink.h" /* LINKMODES_GET */ struct linkmodes_req_info {	struct ethnl_req_info		base;}; struct linkmodes_reply_data {	struct ethnl_reply_data		base;	struct ethtool_link_ksettings	ksettings;	struct ethtool_link_settings	*lsettings;	bool				peer_empty;}; #define LINKMODES_REPDATA(__reply_base) \	container_of(__reply_base, struct linkmodes_reply_data, base) const struct nla_policy ethnl_linkmodes_get_policy[] = {	[ETHTOOL_A_LINKMODES_HEADER]		=		NLA_POLICY_NESTED(ethnl_header_policy),}; static int linkmodes_prepare_data(const struct ethnl_req_info *req_base,				  struct ethnl_reply_data *reply_base,				  const struct genl_info *info){	struct linkmodes_reply_data *data = LINKMODES_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 = netif_get_link_ksettings(dev, &data->ksettings);	if (ret < 0) {		GENL_SET_ERR_MSG(info, "failed to retrieve link settings");		goto out;	} 	if (!dev->ethtool_ops->cap_link_lanes_supported)		data->ksettings.lanes = 0; 	data->peer_empty =		bitmap_empty(data->ksettings.link_modes.lp_advertising,			     __ETHTOOL_LINK_MODE_MASK_NBITS); out:	ethnl_ops_complete(dev);	return ret;} static int linkmodes_reply_size(const struct ethnl_req_info *req_base,				const struct ethnl_reply_data *reply_base){	const struct linkmodes_reply_data *data = LINKMODES_REPDATA(reply_base);	const struct ethtool_link_ksettings *ksettings = &data->ksettings;	const struct ethtool_link_settings *lsettings = &ksettings->base;	bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;	int len, ret; 	len = nla_total_size(sizeof(u8)) /* LINKMODES_AUTONEG */		+ nla_total_size(sizeof(u32)) /* LINKMODES_SPEED */		+ nla_total_size(sizeof(u32)) /* LINKMODES_LANES */		+ nla_total_size(sizeof(u8)) /* LINKMODES_DUPLEX */		+ nla_total_size(sizeof(u8)) /* LINKMODES_RATE_MATCHING */		+ 0;	ret = ethnl_bitset_size(ksettings->link_modes.advertising,				ksettings->link_modes.supported,				__ETHTOOL_LINK_MODE_MASK_NBITS,				link_mode_names, compact);	if (ret < 0)		return ret;	len += ret;	if (!data->peer_empty) {		ret = ethnl_bitset_size(ksettings->link_modes.lp_advertising,					NULL, __ETHTOOL_LINK_MODE_MASK_NBITS,					link_mode_names, compact);		if (ret < 0)			return ret;		len += ret;	} 	if (lsettings->master_slave_cfg != MASTER_SLAVE_CFG_UNSUPPORTED)		len += nla_total_size(sizeof(u8)); 	if (lsettings->master_slave_state != MASTER_SLAVE_STATE_UNSUPPORTED)		len += nla_total_size(sizeof(u8)); 	return len;} static int linkmodes_fill_reply(struct sk_buff *skb,				const struct ethnl_req_info *req_base,				const struct ethnl_reply_data *reply_base){	const struct linkmodes_reply_data *data = LINKMODES_REPDATA(reply_base);	const struct ethtool_link_ksettings *ksettings = &data->ksettings;	const struct ethtool_link_settings *lsettings = &ksettings->base;	bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;	int ret; 	if (nla_put_u8(skb, ETHTOOL_A_LINKMODES_AUTONEG, lsettings->autoneg))		return -EMSGSIZE; 	ret = ethnl_put_bitset(skb, ETHTOOL_A_LINKMODES_OURS,			       ksettings->link_modes.advertising,			       ksettings->link_modes.supported,			       __ETHTOOL_LINK_MODE_MASK_NBITS, link_mode_names,			       compact);	if (ret < 0)		return -EMSGSIZE;	if (!data->peer_empty) {		ret = ethnl_put_bitset(skb, ETHTOOL_A_LINKMODES_PEER,				       ksettings->link_modes.lp_advertising,				       NULL, __ETHTOOL_LINK_MODE_MASK_NBITS,				       link_mode_names, compact);		if (ret < 0)			return -EMSGSIZE;	} 	if (nla_put_u32(skb, ETHTOOL_A_LINKMODES_SPEED, lsettings->speed) ||	    nla_put_u8(skb, ETHTOOL_A_LINKMODES_DUPLEX, lsettings->duplex))		return -EMSGSIZE; 	if (ksettings->lanes &&	    nla_put_u32(skb, ETHTOOL_A_LINKMODES_LANES, ksettings->lanes))		return -EMSGSIZE; 	if (lsettings->master_slave_cfg != MASTER_SLAVE_CFG_UNSUPPORTED &&	    nla_put_u8(skb, ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG,		       lsettings->master_slave_cfg))		return -EMSGSIZE; 	if (lsettings->master_slave_state != MASTER_SLAVE_STATE_UNSUPPORTED &&	    nla_put_u8(skb, ETHTOOL_A_LINKMODES_MASTER_SLAVE_STATE,		       lsettings->master_slave_state))		return -EMSGSIZE; 	if (nla_put_u8(skb, ETHTOOL_A_LINKMODES_RATE_MATCHING,		       lsettings->rate_matching))		return -EMSGSIZE; 	return 0;} /* LINKMODES_SET */ const struct nla_policy ethnl_linkmodes_set_policy[] = {	[ETHTOOL_A_LINKMODES_HEADER]		=		NLA_POLICY_NESTED(ethnl_header_policy),	[ETHTOOL_A_LINKMODES_AUTONEG]		= { .type = NLA_U8 },	[ETHTOOL_A_LINKMODES_OURS]		= { .type = NLA_NESTED },	[ETHTOOL_A_LINKMODES_SPEED]		= { .type = NLA_U32 },	[ETHTOOL_A_LINKMODES_DUPLEX]		= { .type = NLA_U8 },	[ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG]	= { .type = NLA_U8 },	[ETHTOOL_A_LINKMODES_LANES]		= NLA_POLICY_RANGE(NLA_U32, 1, 8),}; /* Set advertised link modes to all supported modes matching requested speed, * lanes and duplex values. Called when autonegotiation is on, speed, lanes or * duplex is requested but no link mode change. This is done in userspace with * ioctl() interface, move it into kernel for netlink. * Returns true if advertised modes bitmap was modified. */static bool ethnl_auto_linkmodes(struct ethtool_link_ksettings *ksettings,				 bool req_speed, bool req_lanes, bool req_duplex){	unsigned long *advertising = ksettings->link_modes.advertising;	unsigned long *supported = ksettings->link_modes.supported;	DECLARE_BITMAP(old_adv, __ETHTOOL_LINK_MODE_MASK_NBITS);	unsigned int i; 	bitmap_copy(old_adv, advertising, __ETHTOOL_LINK_MODE_MASK_NBITS); 	for (i = 0; i < __ETHTOOL_LINK_MODE_MASK_NBITS; i++) {		const struct link_mode_info *info = &link_mode_params[i]; 		if (info->speed == SPEED_UNKNOWN)			continue;		if (test_bit(i, supported) &&		    (!req_speed || info->speed == ksettings->base.speed) &&		    (!req_lanes || info->lanes == ksettings->lanes) &&		    (!req_duplex || info->duplex == ksettings->base.duplex))			set_bit(i, advertising);		else			clear_bit(i, advertising);	} 	return !bitmap_equal(old_adv, advertising,			     __ETHTOOL_LINK_MODE_MASK_NBITS);} static bool ethnl_validate_master_slave_cfg(u8 cfg){	switch (cfg) {	case MASTER_SLAVE_CFG_MASTER_PREFERRED:	case MASTER_SLAVE_CFG_SLAVE_PREFERRED:	case MASTER_SLAVE_CFG_MASTER_FORCE:	case MASTER_SLAVE_CFG_SLAVE_FORCE:		return true;	} 	return false;} static int ethnl_check_linkmodes(struct genl_info *info, struct nlattr **tb){	const struct nlattr *master_slave_cfg, *lanes_cfg; 	master_slave_cfg = tb[ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG];	if (master_slave_cfg &&	    !ethnl_validate_master_slave_cfg(nla_get_u8(master_slave_cfg))) {		NL_SET_ERR_MSG_ATTR(info->extack, master_slave_cfg,				    "master/slave value is invalid");		return -EOPNOTSUPP;	} 	lanes_cfg = tb[ETHTOOL_A_LINKMODES_LANES];	if (lanes_cfg && !is_power_of_2(nla_get_u32(lanes_cfg))) {		NL_SET_ERR_MSG_ATTR(info->extack, lanes_cfg,				    "lanes value is invalid");		return -EINVAL;	} 	return 0;} static int ethnl_update_linkmodes(struct genl_info *info, struct nlattr **tb,				  struct ethtool_link_ksettings *ksettings,				  bool *mod, const struct net_device *dev){	struct ethtool_link_settings *lsettings = &ksettings->base;	bool req_speed, req_lanes, req_duplex;	const struct nlattr *master_slave_cfg, *lanes_cfg;	int ret; 	master_slave_cfg = tb[ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG];	if (master_slave_cfg) {		if (lsettings->master_slave_cfg == MASTER_SLAVE_CFG_UNSUPPORTED) {			NL_SET_ERR_MSG_ATTR(info->extack, master_slave_cfg,					    "master/slave configuration not supported by device");			return -EOPNOTSUPP;		}	} 	*mod = false;	req_speed = tb[ETHTOOL_A_LINKMODES_SPEED];	req_lanes = tb[ETHTOOL_A_LINKMODES_LANES];	req_duplex = tb[ETHTOOL_A_LINKMODES_DUPLEX]; 	ethnl_update_u8(&lsettings->autoneg, tb[ETHTOOL_A_LINKMODES_AUTONEG],			mod); 	lanes_cfg = tb[ETHTOOL_A_LINKMODES_LANES];	if (lanes_cfg) {		/* If autoneg is off and lanes parameter is not supported by the		 * driver, return an error.		 */		if (!lsettings->autoneg &&		    !dev->ethtool_ops->cap_link_lanes_supported) {			NL_SET_ERR_MSG_ATTR(info->extack, lanes_cfg,					    "lanes configuration not supported by device");			return -EOPNOTSUPP;		}	} else if (!lsettings->autoneg && ksettings->lanes) {		/* If autoneg is off and lanes parameter is not passed from user but		 * it was defined previously then set the lanes parameter to 0.		 */		ksettings->lanes = 0;		*mod = true;	} 	ret = ethnl_update_bitset(ksettings->link_modes.advertising,				  __ETHTOOL_LINK_MODE_MASK_NBITS,				  tb[ETHTOOL_A_LINKMODES_OURS], link_mode_names,				  info->extack, mod);	if (ret < 0)		return ret;	ethnl_update_u32(&lsettings->speed, tb[ETHTOOL_A_LINKMODES_SPEED],			 mod);	ethnl_update_u32(&ksettings->lanes, lanes_cfg, mod);	ethnl_update_u8(&lsettings->duplex, tb[ETHTOOL_A_LINKMODES_DUPLEX],			mod);	ethnl_update_u8(&lsettings->master_slave_cfg, master_slave_cfg, mod); 	if (!tb[ETHTOOL_A_LINKMODES_OURS] && lsettings->autoneg &&	    (req_speed || req_lanes || req_duplex) &&	    ethnl_auto_linkmodes(ksettings, req_speed, req_lanes, req_duplex))		*mod = true; 	return 0;} static intethnl_set_linkmodes_validate(struct ethnl_req_info *req_info,			     struct genl_info *info){	const struct ethtool_ops *ops = req_info->dev->ethtool_ops;	int ret; 	ret = ethnl_check_linkmodes(info, info->attrs);	if (ret < 0)		return ret; 	if (!ops->get_link_ksettings || !ops->set_link_ksettings)		return -EOPNOTSUPP;	return 1;} static intethnl_set_linkmodes(struct ethnl_req_info *req_info, struct genl_info *info){	struct ethtool_link_ksettings ksettings = {};	struct net_device *dev = req_info->dev;	struct nlattr **tb = info->attrs;	bool mod = false;	int ret; 	ret = netif_get_link_ksettings(dev, &ksettings);	if (ret < 0) {		GENL_SET_ERR_MSG(info, "failed to retrieve link settings");		return ret;	} 	ret = ethnl_update_linkmodes(info, tb, &ksettings, &mod, dev);	if (ret < 0)		return ret;	if (!mod)		return 0; 	ret = dev->ethtool_ops->set_link_ksettings(dev, &ksettings);	if (ret < 0) {		GENL_SET_ERR_MSG(info, "link settings update failed");		return ret;	} 	return 1;} const struct ethnl_request_ops ethnl_linkmodes_request_ops = {	.request_cmd		= ETHTOOL_MSG_LINKMODES_GET,	.reply_cmd		= ETHTOOL_MSG_LINKMODES_GET_REPLY,	.hdr_attr		= ETHTOOL_A_LINKMODES_HEADER,	.req_info_size		= sizeof(struct linkmodes_req_info),	.reply_data_size	= sizeof(struct linkmodes_reply_data), 	.prepare_data		= linkmodes_prepare_data,	.reply_size		= linkmodes_reply_size,	.fill_reply		= linkmodes_fill_reply, 	.set_validate		= ethnl_set_linkmodes_validate,	.set			= ethnl_set_linkmodes,	.set_ntf_cmd		= ETHTOOL_MSG_LINKMODES_NTF,};