[linux-block.git] / net / ethtool / linkinfo.c

// 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;
}

/* 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 },
};

static int
ethnl_set_linkinfo_validate(struct ethnl_req_info *req_info,
			    struct genl_info *info)
{
	const struct ethtool_ops *ops = req_info->dev->ethtool_ops;

	if (!ops->get_link_ksettings || !ops->set_link_ksettings)
		return -EOPNOTSUPP;
	return 1;
}

static int
ethnl_set_linkinfo(struct ethnl_req_info *req_info, struct genl_info *info)
{
	struct ethtool_link_ksettings ksettings = {};
	struct ethtool_link_settings *lsettings;
	struct net_device *dev = req_info->dev;
	struct nlattr **tb = info->attrs;
	bool mod = false;
	int ret;

	ret = __ethtool_get_link_ksettings(dev, &ksettings);
	if (ret < 0) {
		GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
		return ret;
	}
	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);
	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_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,

	.set_validate		= ethnl_set_linkinfo_validate,
	.set			= ethnl_set_linkinfo,
	.set_ntf_cmd		= ETHTOOL_MSG_LINKINFO_NTF,
};
Commit	Line	Data
459e0b81 MK	1	// SPDX-License-Identifier: GPL-2.0-only
	2
	3	#include "netlink.h"
	4	#include "common.h"
	5
	6	struct linkinfo_req_info {
	7	struct ethnl_req_info base;
	8	};
	9
	10	struct linkinfo_reply_data {
	11	struct ethnl_reply_data base;
	12	struct ethtool_link_ksettings ksettings;
	13	struct ethtool_link_settings *lsettings;
	14	};
	15
	16	#define LINKINFO_REPDATA(__reply_base) \
	17	container_of(__reply_base, struct linkinfo_reply_data, base)
	18
ff419afa	19	const struct nla_policy ethnl_linkinfo_get_policy[] = {
329d9c33 JK	20	[ETHTOOL_A_LINKINFO_HEADER] =
329d9c33 JK	21	NLA_POLICY_NESTED(ethnl_header_policy),
459e0b81 MK	22	};
	23
	24	static int linkinfo_prepare_data(const struct ethnl_req_info *req_base,
	25	struct ethnl_reply_data *reply_base,
	26	struct genl_info *info)
	27	{
	28	struct linkinfo_reply_data *data = LINKINFO_REPDATA(reply_base);
	29	struct net_device *dev = reply_base->dev;
	30	int ret;
	31
	32	data->lsettings = &data->ksettings.base;
	33
	34	ret = ethnl_ops_begin(dev);
	35	if (ret < 0)
	36	return ret;
	37	ret = __ethtool_get_link_ksettings(dev, &data->ksettings);
	38	if (ret < 0 && info)
	39	GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
	40	ethnl_ops_complete(dev);
	41
	42	return ret;
	43	}
	44
	45	static int linkinfo_reply_size(const struct ethnl_req_info *req_base,
	46	const struct ethnl_reply_data *reply_base)
	47	{
	48	return nla_total_size(sizeof(u8)) /* LINKINFO_PORT */
	49	+ nla_total_size(sizeof(u8)) /* LINKINFO_PHYADDR */
	50	+ nla_total_size(sizeof(u8)) /* LINKINFO_TP_MDIX */
	51	+ nla_total_size(sizeof(u8)) /* LINKINFO_TP_MDIX_CTRL */
	52	+ nla_total_size(sizeof(u8)) /* LINKINFO_TRANSCEIVER */
	53	+ 0;
	54	}
	55
	56	static int linkinfo_fill_reply(struct sk_buff *skb,
	57	const struct ethnl_req_info *req_base,
	58	const struct ethnl_reply_data *reply_base)
	59	{
	60	const struct linkinfo_reply_data *data = LINKINFO_REPDATA(reply_base);
	61
	62	if (nla_put_u8(skb, ETHTOOL_A_LINKINFO_PORT, data->lsettings->port) \|\|
	63	nla_put_u8(skb, ETHTOOL_A_LINKINFO_PHYADDR,
	64	data->lsettings->phy_address) \|\|
	65	nla_put_u8(skb, ETHTOOL_A_LINKINFO_TP_MDIX,
	66	data->lsettings->eth_tp_mdix) \|\|
	67	nla_put_u8(skb, ETHTOOL_A_LINKINFO_TP_MDIX_CTRL,
	68	data->lsettings->eth_tp_mdix_ctrl) \|\|
	69	nla_put_u8(skb, ETHTOOL_A_LINKINFO_TRANSCEIVER,
	70	data->lsettings->transceiver))
	71	return -EMSGSIZE;
	72
	73	return 0;
	74	}
	75
a53f3d41 MK	76	/* LINKINFO_SET */
a53f3d41 MK	77
ff419afa	78	const struct nla_policy ethnl_linkinfo_set_policy[] = {
329d9c33 JK	79	[ETHTOOL_A_LINKINFO_HEADER] =
329d9c33 JK	80	NLA_POLICY_NESTED(ethnl_header_policy),
a53f3d41 MK	81	[ETHTOOL_A_LINKINFO_PORT] = { .type = NLA_U8 },
a53f3d41 MK	82	[ETHTOOL_A_LINKINFO_PHYADDR] = { .type = NLA_U8 },
a53f3d41	83	[ETHTOOL_A_LINKINFO_TP_MDIX_CTRL] = { .type = NLA_U8 },
a53f3d41 MK	84	};
a53f3d41 MK	85
04007961 JK	86	static int
	87	ethnl_set_linkinfo_validate(struct ethnl_req_info *req_info,
	88	struct genl_info *info)
	89	{
	90	const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
	91
	92	if (!ops->get_link_ksettings \|\| !ops->set_link_ksettings)
	93	return -EOPNOTSUPP;
	94	return 1;
	95	}
	96
	97	static int
	98	ethnl_set_linkinfo(struct ethnl_req_info req_info, struct genl_info info)
a53f3d41	99	{
a53f3d41 MK	100	struct ethtool_link_ksettings ksettings = {};
a53f3d41 MK	101	struct ethtool_link_settings *lsettings;
04007961	102	struct net_device *dev = req_info->dev;
5028588b	103	struct nlattr **tb = info->attrs;
a53f3d41 MK	104	bool mod = false;
	105	int ret;
	106
a53f3d41 MK	107	ret = __ethtool_get_link_ksettings(dev, &ksettings);
a53f3d41 MK	108	if (ret < 0) {
178f67b1	109	GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
04007961	110	return ret;
a53f3d41 MK	111	}
	112	lsettings = &ksettings.base;
	113
	114	ethnl_update_u8(&lsettings->port, tb[ETHTOOL_A_LINKINFO_PORT], &mod);
	115	ethnl_update_u8(&lsettings->phy_address, tb[ETHTOOL_A_LINKINFO_PHYADDR],
	116	&mod);
	117	ethnl_update_u8(&lsettings->eth_tp_mdix_ctrl,
	118	tb[ETHTOOL_A_LINKINFO_TP_MDIX_CTRL], &mod);
a53f3d41	119	if (!mod)
04007961	120	return 0;
a53f3d41 MK	121
a53f3d41 MK	122	ret = dev->ethtool_ops->set_link_ksettings(dev, &ksettings);
04007961	123	if (ret < 0) {
a53f3d41	124	GENL_SET_ERR_MSG(info, "link settings update failed");
04007961 JK	125	return ret;
04007961 JK	126	}
a53f3d41	127
04007961	128	return 1;
a53f3d41	129	}
04007961 JK	130
	131	const struct ethnl_request_ops ethnl_linkinfo_request_ops = {
	132	.request_cmd = ETHTOOL_MSG_LINKINFO_GET,
	133	.reply_cmd = ETHTOOL_MSG_LINKINFO_GET_REPLY,
	134	.hdr_attr = ETHTOOL_A_LINKINFO_HEADER,
	135	.req_info_size = sizeof(struct linkinfo_req_info),
	136	.reply_data_size = sizeof(struct linkinfo_reply_data),
	137
	138	.prepare_data = linkinfo_prepare_data,
	139	.reply_size = linkinfo_reply_size,
	140	.fill_reply = linkinfo_fill_reply,
	141
	142	.set_validate = ethnl_set_linkinfo_validate,
	143	.set = ethnl_set_linkinfo,
	144	.set_ntf_cmd = ETHTOOL_MSG_LINKINFO_NTF,
	145	};