// SPDX-License-Identifier: GPL-2.0-only #include "netlink.h"#include "common.h" struct pause_req_info {	struct ethnl_req_info		base;}; struct pause_reply_data {	struct ethnl_reply_data		base;	struct ethtool_pauseparam	pauseparam;	struct ethtool_pause_stats	pausestat;}; #define PAUSE_REPDATA(__reply_base) \	container_of(__reply_base, struct pause_reply_data, base) const struct nla_policy ethnl_pause_get_policy[] = {	[ETHTOOL_A_PAUSE_HEADER]		=		NLA_POLICY_NESTED(ethnl_header_policy_stats),}; static int pause_prepare_data(const struct ethnl_req_info *req_base,			      struct ethnl_reply_data *reply_base,			      struct genl_info *info){	struct pause_reply_data *data = PAUSE_REPDATA(reply_base);	struct net_device *dev = reply_base->dev;	int ret; 	if (!dev->ethtool_ops->get_pauseparam)		return -EOPNOTSUPP; 	ethtool_stats_init((u64 *)&data->pausestat,			   sizeof(data->pausestat) / 8); 	ret = ethnl_ops_begin(dev);	if (ret < 0)		return ret;	dev->ethtool_ops->get_pauseparam(dev, &data->pauseparam);	if (req_base->flags & ETHTOOL_FLAG_STATS &&	    dev->ethtool_ops->get_pause_stats)		dev->ethtool_ops->get_pause_stats(dev, &data->pausestat);	ethnl_ops_complete(dev); 	return 0;} static int pause_reply_size(const struct ethnl_req_info *req_base,			    const struct ethnl_reply_data *reply_base){	int n = nla_total_size(sizeof(u8)) +	/* _PAUSE_AUTONEG */		nla_total_size(sizeof(u8)) +	/* _PAUSE_RX */		nla_total_size(sizeof(u8));	/* _PAUSE_TX */ 	if (req_base->flags & ETHTOOL_FLAG_STATS)		n += nla_total_size(0) +	/* _PAUSE_STATS */		     nla_total_size_64bit(sizeof(u64)) * ETHTOOL_PAUSE_STAT_CNT;	return n;} static int ethtool_put_stat(struct sk_buff *skb, u64 val, u16 attrtype,			    u16 padtype){	if (val == ETHTOOL_STAT_NOT_SET)		return 0;	if (nla_put_u64_64bit(skb, attrtype, val, padtype))		return -EMSGSIZE; 	return 0;} static int pause_put_stats(struct sk_buff *skb,			   const struct ethtool_pause_stats *pause_stats){	const u16 pad = ETHTOOL_A_PAUSE_STAT_PAD;	struct nlattr *nest; 	nest = nla_nest_start(skb, ETHTOOL_A_PAUSE_STATS);	if (!nest)		return -EMSGSIZE; 	if (ethtool_put_stat(skb, pause_stats->tx_pause_frames,			     ETHTOOL_A_PAUSE_STAT_TX_FRAMES, pad) ||	    ethtool_put_stat(skb, pause_stats->rx_pause_frames,			     ETHTOOL_A_PAUSE_STAT_RX_FRAMES, pad))		goto err_cancel; 	nla_nest_end(skb, nest);	return 0; err_cancel:	nla_nest_cancel(skb, nest);	return -EMSGSIZE;} static int pause_fill_reply(struct sk_buff *skb,			    const struct ethnl_req_info *req_base,			    const struct ethnl_reply_data *reply_base){	const struct pause_reply_data *data = PAUSE_REPDATA(reply_base);	const struct ethtool_pauseparam *pauseparam = &data->pauseparam; 	if (nla_put_u8(skb, ETHTOOL_A_PAUSE_AUTONEG, !!pauseparam->autoneg) ||	    nla_put_u8(skb, ETHTOOL_A_PAUSE_RX, !!pauseparam->rx_pause) ||	    nla_put_u8(skb, ETHTOOL_A_PAUSE_TX, !!pauseparam->tx_pause))		return -EMSGSIZE; 	if (req_base->flags & ETHTOOL_FLAG_STATS &&	    pause_put_stats(skb, &data->pausestat))		return -EMSGSIZE; 	return 0;} const struct ethnl_request_ops ethnl_pause_request_ops = {	.request_cmd		= ETHTOOL_MSG_PAUSE_GET,	.reply_cmd		= ETHTOOL_MSG_PAUSE_GET_REPLY,	.hdr_attr		= ETHTOOL_A_PAUSE_HEADER,	.req_info_size		= sizeof(struct pause_req_info),	.reply_data_size	= sizeof(struct pause_reply_data), 	.prepare_data		= pause_prepare_data,	.reply_size		= pause_reply_size,	.fill_reply		= pause_fill_reply,}; /* PAUSE_SET */ const struct nla_policy ethnl_pause_set_policy[] = {	[ETHTOOL_A_PAUSE_HEADER]		=		NLA_POLICY_NESTED(ethnl_header_policy),	[ETHTOOL_A_PAUSE_AUTONEG]		= { .type = NLA_U8 },	[ETHTOOL_A_PAUSE_RX]			= { .type = NLA_U8 },	[ETHTOOL_A_PAUSE_TX]			= { .type = NLA_U8 },}; int ethnl_set_pause(struct sk_buff *skb, struct genl_info *info){	struct ethtool_pauseparam params = {};	struct ethnl_req_info req_info = {};	struct nlattr **tb = info->attrs;	const struct ethtool_ops *ops;	struct net_device *dev;	bool mod = false;	int ret; 	ret = ethnl_parse_header_dev_get(&req_info,					 tb[ETHTOOL_A_PAUSE_HEADER],					 genl_info_net(info), info->extack,					 true);	if (ret < 0)		return ret;	dev = req_info.dev;	ops = dev->ethtool_ops;	ret = -EOPNOTSUPP;	if (!ops->get_pauseparam || !ops->set_pauseparam)		goto out_dev; 	rtnl_lock();	ret = ethnl_ops_begin(dev);	if (ret < 0)		goto out_rtnl;	ops->get_pauseparam(dev, &params); 	ethnl_update_bool32(&params.autoneg, tb[ETHTOOL_A_PAUSE_AUTONEG], &mod);	ethnl_update_bool32(&params.rx_pause, tb[ETHTOOL_A_PAUSE_RX], &mod);	ethnl_update_bool32(&params.tx_pause, tb[ETHTOOL_A_PAUSE_TX], &mod);	ret = 0;	if (!mod)		goto out_ops; 	ret = dev->ethtool_ops->set_pauseparam(dev, &params);	if (ret < 0)		goto out_ops;	ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL); out_ops:	ethnl_ops_complete(dev);out_rtnl:	rtnl_unlock();out_dev:	ethnl_parse_header_dev_put(&req_info);	return ret;}