[people/ms/linux.git] / net / ethtool / pause.c

// 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;
}
Commit	Line	Data
7f59fb32 MK	1	// SPDX-License-Identifier: GPL-2.0-only
	2
	3	#include "netlink.h"
	4	#include "common.h"
	5
	6	struct pause_req_info {
	7	struct ethnl_req_info base;
	8	};
	9
	10	struct pause_reply_data {
	11	struct ethnl_reply_data base;
	12	struct ethtool_pauseparam pauseparam;
9a27a330	13	struct ethtool_pause_stats pausestat;
7f59fb32 MK	14	};
	15
	16	#define PAUSE_REPDATA(__reply_base) \
	17	container_of(__reply_base, struct pause_reply_data, base)
	18
ff419afa	19	const struct nla_policy ethnl_pause_get_policy[] = {
329d9c33	20	[ETHTOOL_A_PAUSE_HEADER] =
a0de1cd3	21	NLA_POLICY_NESTED(ethnl_header_policy_stats),
7f59fb32 MK	22	};
	23
	24	static int pause_prepare_data(const struct ethnl_req_info *req_base,
	25	struct ethnl_reply_data *reply_base,
	26	struct genl_info *info)
	27	{
	28	struct pause_reply_data *data = PAUSE_REPDATA(reply_base);
	29	struct net_device *dev = reply_base->dev;
	30	int ret;
	31
	32	if (!dev->ethtool_ops->get_pauseparam)
	33	return -EOPNOTSUPP;
9a27a330	34
16756d3e JK	35	ethtool_stats_init((u64 *)&data->pausestat,
	36	sizeof(data->pausestat) / 8);
	37
7f59fb32 MK	38	ret = ethnl_ops_begin(dev);
	39	if (ret < 0)
	40	return ret;
	41	dev->ethtool_ops->get_pauseparam(dev, &data->pauseparam);
9a27a330	42	if (req_base->flags & ETHTOOL_FLAG_STATS &&
16756d3e	43	dev->ethtool_ops->get_pause_stats)
9a27a330	44	dev->ethtool_ops->get_pause_stats(dev, &data->pausestat);
7f59fb32 MK	45	ethnl_ops_complete(dev);
	46
	47	return 0;
	48	}
	49
	50	static int pause_reply_size(const struct ethnl_req_info *req_base,
	51	const struct ethnl_reply_data *reply_base)
	52	{
9a27a330	53	int n = nla_total_size(sizeof(u8)) + /* _PAUSE_AUTONEG */
7f59fb32 MK	54	nla_total_size(sizeof(u8)) + /* _PAUSE_RX */
7f59fb32 MK	55	nla_total_size(sizeof(u8)); /* _PAUSE_TX */
9a27a330 JK	56
	57	if (req_base->flags & ETHTOOL_FLAG_STATS)
	58	n += nla_total_size(0) + /* _PAUSE_STATS */
1aabe578	59	nla_total_size_64bit(sizeof(u64)) * ETHTOOL_PAUSE_STAT_CNT;
9a27a330 JK	60	return n;
	61	}
	62
	63	static int ethtool_put_stat(struct sk_buff *skb, u64 val, u16 attrtype,
	64	u16 padtype)
	65	{
	66	if (val == ETHTOOL_STAT_NOT_SET)
	67	return 0;
	68	if (nla_put_u64_64bit(skb, attrtype, val, padtype))
	69	return -EMSGSIZE;
	70
	71	return 0;
	72	}
	73
	74	static int pause_put_stats(struct sk_buff *skb,
	75	const struct ethtool_pause_stats *pause_stats)
	76	{
	77	const u16 pad = ETHTOOL_A_PAUSE_STAT_PAD;
	78	struct nlattr *nest;
	79
	80	nest = nla_nest_start(skb, ETHTOOL_A_PAUSE_STATS);
	81	if (!nest)
	82	return -EMSGSIZE;
	83
	84	if (ethtool_put_stat(skb, pause_stats->tx_pause_frames,
	85	ETHTOOL_A_PAUSE_STAT_TX_FRAMES, pad) \|\|
	86	ethtool_put_stat(skb, pause_stats->rx_pause_frames,
	87	ETHTOOL_A_PAUSE_STAT_RX_FRAMES, pad))
	88	goto err_cancel;
	89
	90	nla_nest_end(skb, nest);
	91	return 0;
	92
	93	err_cancel:
	94	nla_nest_cancel(skb, nest);
	95	return -EMSGSIZE;
7f59fb32 MK	96	}
	97
	98	static int pause_fill_reply(struct sk_buff *skb,
	99	const struct ethnl_req_info *req_base,
	100	const struct ethnl_reply_data *reply_base)
	101	{
	102	const struct pause_reply_data *data = PAUSE_REPDATA(reply_base);
	103	const struct ethtool_pauseparam *pauseparam = &data->pauseparam;
	104
	105	if (nla_put_u8(skb, ETHTOOL_A_PAUSE_AUTONEG, !!pauseparam->autoneg) \|\|
	106	nla_put_u8(skb, ETHTOOL_A_PAUSE_RX, !!pauseparam->rx_pause) \|\|
	107	nla_put_u8(skb, ETHTOOL_A_PAUSE_TX, !!pauseparam->tx_pause))
	108	return -EMSGSIZE;
	109
9a27a330 JK	110	if (req_base->flags & ETHTOOL_FLAG_STATS &&
	111	pause_put_stats(skb, &data->pausestat))
	112	return -EMSGSIZE;
	113
7f59fb32 MK	114	return 0;
	115	}
	116
	117	const struct ethnl_request_ops ethnl_pause_request_ops = {
	118	.request_cmd = ETHTOOL_MSG_PAUSE_GET,
	119	.reply_cmd = ETHTOOL_MSG_PAUSE_GET_REPLY,
	120	.hdr_attr = ETHTOOL_A_PAUSE_HEADER,
7f59fb32 MK	121	.req_info_size = sizeof(struct pause_req_info),
7f59fb32 MK	122	.reply_data_size = sizeof(struct pause_reply_data),
7f59fb32 MK	123
	124	.prepare_data = pause_prepare_data,
	125	.reply_size = pause_reply_size,
	126	.fill_reply = pause_fill_reply,
	127	};
3ab87993 MK	128
	129	/* PAUSE_SET */
	130
ff419afa	131	const struct nla_policy ethnl_pause_set_policy[] = {
329d9c33 JK	132	[ETHTOOL_A_PAUSE_HEADER] =
329d9c33 JK	133	NLA_POLICY_NESTED(ethnl_header_policy),
3ab87993 MK	134	[ETHTOOL_A_PAUSE_AUTONEG] = { .type = NLA_U8 },
	135	[ETHTOOL_A_PAUSE_RX] = { .type = NLA_U8 },
	136	[ETHTOOL_A_PAUSE_TX] = { .type = NLA_U8 },
	137	};
	138
	139	int ethnl_set_pause(struct sk_buff skb, struct genl_info info)
	140	{
3ab87993 MK	141	struct ethtool_pauseparam params = {};
3ab87993 MK	142	struct ethnl_req_info req_info = {};
5028588b	143	struct nlattr **tb = info->attrs;
3ab87993 MK	144	const struct ethtool_ops *ops;
	145	struct net_device *dev;
	146	bool mod = false;
	147	int ret;
	148
3ab87993 MK	149	ret = ethnl_parse_header_dev_get(&req_info,
	150	tb[ETHTOOL_A_PAUSE_HEADER],
	151	genl_info_net(info), info->extack,
	152	true);
	153	if (ret < 0)
	154	return ret;
	155	dev = req_info.dev;
	156	ops = dev->ethtool_ops;
	157	ret = -EOPNOTSUPP;
	158	if (!ops->get_pauseparam \|\| !ops->set_pauseparam)
	159	goto out_dev;
	160
	161	rtnl_lock();
	162	ret = ethnl_ops_begin(dev);
	163	if (ret < 0)
	164	goto out_rtnl;
	165	ops->get_pauseparam(dev, &params);
	166
	167	ethnl_update_bool32(&params.autoneg, tb[ETHTOOL_A_PAUSE_AUTONEG], &mod);
	168	ethnl_update_bool32(&params.rx_pause, tb[ETHTOOL_A_PAUSE_RX], &mod);
	169	ethnl_update_bool32(&params.tx_pause, tb[ETHTOOL_A_PAUSE_TX], &mod);
	170	ret = 0;
	171	if (!mod)
	172	goto out_ops;
	173
	174	ret = dev->ethtool_ops->set_pauseparam(dev, &params);
bf37faa3 MK	175	if (ret < 0)
	176	goto out_ops;
	177	ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
3ab87993 MK	178
	179	out_ops:
	180	ethnl_ops_complete(dev);
	181	out_rtnl:
	182	rtnl_unlock();
	183	out_dev:
34ac17ec	184	ethnl_parse_header_dev_put(&req_info);
3ab87993 MK	185	return ret;
3ab87993 MK	186	}