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

// SPDX-License-Identifier: GPL-2.0-only

#include <linux/ethtool.h>

#include "netlink.h"
#include "common.h"
#include "bitset.h"

struct module_req_info {
	struct ethnl_req_info base;
};

struct module_reply_data {
	struct ethnl_reply_data	base;
	struct ethtool_module_power_mode_params power;
};

#define MODULE_REPDATA(__reply_base) \
	container_of(__reply_base, struct module_reply_data, base)

/* MODULE_GET */

const struct nla_policy ethnl_module_get_policy[ETHTOOL_A_MODULE_HEADER + 1] = {
	[ETHTOOL_A_MODULE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
};

static int module_get_power_mode(struct net_device *dev,
				 struct module_reply_data *data,
				 struct netlink_ext_ack *extack)
{
	const struct ethtool_ops *ops = dev->ethtool_ops;

	if (!ops->get_module_power_mode)
		return 0;

	return ops->get_module_power_mode(dev, &data->power, extack);
}

static int module_prepare_data(const struct ethnl_req_info *req_base,
			       struct ethnl_reply_data *reply_base,
			       struct genl_info *info)
{
	struct module_reply_data *data = MODULE_REPDATA(reply_base);
	struct netlink_ext_ack *extack = info ? info->extack : NULL;
	struct net_device *dev = reply_base->dev;
	int ret;

	ret = ethnl_ops_begin(dev);
	if (ret < 0)
		return ret;

	ret = module_get_power_mode(dev, data, extack);
	if (ret < 0)
		goto out_complete;

out_complete:
	ethnl_ops_complete(dev);
	return ret;
}

static int module_reply_size(const struct ethnl_req_info *req_base,
			     const struct ethnl_reply_data *reply_base)
{
	struct module_reply_data *data = MODULE_REPDATA(reply_base);
	int len = 0;

	if (data->power.policy)
		len += nla_total_size(sizeof(u8));	/* _MODULE_POWER_MODE_POLICY */

	if (data->power.mode)
		len += nla_total_size(sizeof(u8));	/* _MODULE_POWER_MODE */

	return len;
}

static int module_fill_reply(struct sk_buff *skb,
			     const struct ethnl_req_info *req_base,
			     const struct ethnl_reply_data *reply_base)
{
	const struct module_reply_data *data = MODULE_REPDATA(reply_base);

	if (data->power.policy &&
	    nla_put_u8(skb, ETHTOOL_A_MODULE_POWER_MODE_POLICY,
		       data->power.policy))
		return -EMSGSIZE;

	if (data->power.mode &&
	    nla_put_u8(skb, ETHTOOL_A_MODULE_POWER_MODE, data->power.mode))
		return -EMSGSIZE;

	return 0;
}

/* MODULE_SET */

const struct nla_policy ethnl_module_set_policy[ETHTOOL_A_MODULE_POWER_MODE_POLICY + 1] = {
	[ETHTOOL_A_MODULE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
	[ETHTOOL_A_MODULE_POWER_MODE_POLICY] =
		NLA_POLICY_RANGE(NLA_U8, ETHTOOL_MODULE_POWER_MODE_POLICY_HIGH,
				 ETHTOOL_MODULE_POWER_MODE_POLICY_AUTO),
};

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

	if (!tb[ETHTOOL_A_MODULE_POWER_MODE_POLICY])
		return 0;

	if (!ops->get_module_power_mode || !ops->set_module_power_mode) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[ETHTOOL_A_MODULE_POWER_MODE_POLICY],
				    "Setting power mode policy is not supported by this device");
		return -EOPNOTSUPP;
	}

	return 1;
}

static int
ethnl_set_module(struct ethnl_req_info *req_info, struct genl_info *info)
{
	struct ethtool_module_power_mode_params power = {};
	struct ethtool_module_power_mode_params power_new;
	const struct ethtool_ops *ops;
	struct net_device *dev = req_info->dev;
	struct nlattr **tb = info->attrs;
	int ret;

	ops = dev->ethtool_ops;

	power_new.policy = nla_get_u8(tb[ETHTOOL_A_MODULE_POWER_MODE_POLICY]);
	ret = ops->get_module_power_mode(dev, &power, info->extack);
	if (ret < 0)
		return ret;

	if (power_new.policy == power.policy)
		return 0;

	ret = ops->set_module_power_mode(dev, &power_new, info->extack);
	return ret < 0 ? ret : 1;
}

const struct ethnl_request_ops ethnl_module_request_ops = {
	.request_cmd		= ETHTOOL_MSG_MODULE_GET,
	.reply_cmd		= ETHTOOL_MSG_MODULE_GET_REPLY,
	.hdr_attr		= ETHTOOL_A_MODULE_HEADER,
	.req_info_size		= sizeof(struct module_req_info),
	.reply_data_size	= sizeof(struct module_reply_data),

	.prepare_data		= module_prepare_data,
	.reply_size		= module_reply_size,
	.fill_reply		= module_fill_reply,

	.set_validate		= ethnl_set_module_validate,
	.set			= ethnl_set_module,
	.set_ntf_cmd		= ETHTOOL_MSG_MODULE_NTF,
};
Commit	Line	Data
353407d9 IS	1	// SPDX-License-Identifier: GPL-2.0-only
	2
	3	#include <linux/ethtool.h>
	4
	5	#include "netlink.h"
	6	#include "common.h"
	7	#include "bitset.h"
	8
	9	struct module_req_info {
	10	struct ethnl_req_info base;
	11	};
	12
	13	struct module_reply_data {
	14	struct ethnl_reply_data base;
	15	struct ethtool_module_power_mode_params power;
	16	};
	17
	18	#define MODULE_REPDATA(__reply_base) \
	19	container_of(__reply_base, struct module_reply_data, base)
	20
	21	/* MODULE_GET */
	22
	23	const struct nla_policy ethnl_module_get_policy[ETHTOOL_A_MODULE_HEADER + 1] = {
	24	[ETHTOOL_A_MODULE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
	25	};
	26
	27	static int module_get_power_mode(struct net_device *dev,
	28	struct module_reply_data *data,
	29	struct netlink_ext_ack *extack)
	30	{
	31	const struct ethtool_ops *ops = dev->ethtool_ops;
	32
	33	if (!ops->get_module_power_mode)
	34	return 0;
	35
	36	return ops->get_module_power_mode(dev, &data->power, extack);
	37	}
	38
	39	static int module_prepare_data(const struct ethnl_req_info *req_base,
	40	struct ethnl_reply_data *reply_base,
	41	struct genl_info *info)
	42	{
	43	struct module_reply_data *data = MODULE_REPDATA(reply_base);
	44	struct netlink_ext_ack *extack = info ? info->extack : NULL;
	45	struct net_device *dev = reply_base->dev;
	46	int ret;
	47
	48	ret = ethnl_ops_begin(dev);
	49	if (ret < 0)
	50	return ret;
	51
	52	ret = module_get_power_mode(dev, data, extack);
	53	if (ret < 0)
	54	goto out_complete;
	55
	56	out_complete:
	57	ethnl_ops_complete(dev);
	58	return ret;
	59	}
	60
	61	static int module_reply_size(const struct ethnl_req_info *req_base,
	62	const struct ethnl_reply_data *reply_base)
	63	{
	64	struct module_reply_data *data = MODULE_REPDATA(reply_base);
65	int len = 0;
66
67	if (data->power.policy)
68	len += nla_total_size(sizeof(u8)); /* _MODULE_POWER_MODE_POLICY */
69
70	if (data->power.mode)
71	len += nla_total_size(sizeof(u8)); /* _MODULE_POWER_MODE */
72
73	return len;
74	}
75
76	static int module_fill_reply(struct sk_buff *skb,
77	const struct ethnl_req_info *req_base,
78	const struct ethnl_reply_data *reply_base)
79	{
80	const struct module_reply_data *data = MODULE_REPDATA(reply_base);
81
82	if (data->power.policy &&
83	nla_put_u8(skb, ETHTOOL_A_MODULE_POWER_MODE_POLICY,
84	data->power.policy))
85	return -EMSGSIZE;
86
87	if (data->power.mode &&
88	nla_put_u8(skb, ETHTOOL_A_MODULE_POWER_MODE, data->power.mode))
89	return -EMSGSIZE;
90
91	return 0;
92	}
93
353407d9 IS	94	/* MODULE_SET */
	95
	96	const struct nla_policy ethnl_module_set_policy[ETHTOOL_A_MODULE_POWER_MODE_POLICY + 1] = {
	97	[ETHTOOL_A_MODULE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
	98	[ETHTOOL_A_MODULE_POWER_MODE_POLICY] =
	99	NLA_POLICY_RANGE(NLA_U8, ETHTOOL_MODULE_POWER_MODE_POLICY_HIGH,
	100	ETHTOOL_MODULE_POWER_MODE_POLICY_AUTO),
	101	};
	102
04007961 JK	103	static int
	104	ethnl_set_module_validate(struct ethnl_req_info *req_info,
	105	struct genl_info *info)
353407d9	106	{
04007961 JK	107	const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
04007961 JK	108	struct nlattr **tb = info->attrs;
353407d9 IS	109
	110	if (!tb[ETHTOOL_A_MODULE_POWER_MODE_POLICY])
	111	return 0;
	112
	113	if (!ops->get_module_power_mode \|\| !ops->set_module_power_mode) {
04007961	114	NL_SET_ERR_MSG_ATTR(info->extack,
353407d9 IS	115	tb[ETHTOOL_A_MODULE_POWER_MODE_POLICY],
	116	"Setting power mode policy is not supported by this device");
	117	return -EOPNOTSUPP;
	118	}
	119
04007961	120	return 1;
353407d9 IS	121	}
353407d9 IS	122
04007961 JK	123	static int
04007961 JK	124	ethnl_set_module(struct ethnl_req_info req_info, struct genl_info info)
353407d9	125	{
04007961 JK	126	struct ethtool_module_power_mode_params power = {};
	127	struct ethtool_module_power_mode_params power_new;
	128	const struct ethtool_ops *ops;
	129	struct net_device *dev = req_info->dev;
353407d9	130	struct nlattr **tb = info->attrs;
353407d9 IS	131	int ret;
353407d9 IS	132
04007961 JK	133	ops = dev->ethtool_ops;
	134
	135	power_new.policy = nla_get_u8(tb[ETHTOOL_A_MODULE_POWER_MODE_POLICY]);
	136	ret = ops->get_module_power_mode(dev, &power, info->extack);
353407d9 IS	137	if (ret < 0)
353407d9 IS	138	return ret;
353407d9	139
04007961 JK	140	if (power_new.policy == power.policy)
04007961 JK	141	return 0;
353407d9	142
04007961 JK	143	ret = ops->set_module_power_mode(dev, &power_new, info->extack);
	144	return ret < 0 ? ret : 1;
	145	}
353407d9	146
04007961 JK	147	const struct ethnl_request_ops ethnl_module_request_ops = {
	148	.request_cmd = ETHTOOL_MSG_MODULE_GET,
	149	.reply_cmd = ETHTOOL_MSG_MODULE_GET_REPLY,
	150	.hdr_attr = ETHTOOL_A_MODULE_HEADER,
	151	.req_info_size = sizeof(struct module_req_info),
	152	.reply_data_size = sizeof(struct module_reply_data),
353407d9	153
04007961 JK	154	.prepare_data = module_prepare_data,
	155	.reply_size = module_reply_size,
	156	.fill_reply = module_fill_reply,
353407d9	157
04007961 JK	158	.set_validate = ethnl_set_module_validate,
	159	.set = ethnl_set_module,
	160	.set_ntf_cmd = ETHTOOL_MSG_MODULE_NTF,
	161	};