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

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

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

struct debug_req_info {
	struct ethnl_req_info		base;
};

struct debug_reply_data {
	struct ethnl_reply_data		base;
	u32				msg_mask;
};

#define DEBUG_REPDATA(__reply_base) \
	container_of(__reply_base, struct debug_reply_data, base)

static const struct nla_policy
debug_get_policy[ETHTOOL_A_DEBUG_MAX + 1] = {
	[ETHTOOL_A_DEBUG_UNSPEC]	= { .type = NLA_REJECT },
	[ETHTOOL_A_DEBUG_HEADER]	= { .type = NLA_NESTED },
	[ETHTOOL_A_DEBUG_MSGMASK]	= { .type = NLA_REJECT },
};

static int debug_prepare_data(const struct ethnl_req_info *req_base,
			      struct ethnl_reply_data *reply_base,
			      struct genl_info *info)
{
	struct debug_reply_data *data = DEBUG_REPDATA(reply_base);
	struct net_device *dev = reply_base->dev;
	int ret;

	if (!dev->ethtool_ops->get_msglevel)
		return -EOPNOTSUPP;

	ret = ethnl_ops_begin(dev);
	if (ret < 0)
		return ret;
	data->msg_mask = dev->ethtool_ops->get_msglevel(dev);
	ethnl_ops_complete(dev);

	return 0;
}

static int debug_reply_size(const struct ethnl_req_info *req_base,
			    const struct ethnl_reply_data *reply_base)
{
	const struct debug_reply_data *data = DEBUG_REPDATA(reply_base);
	bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;

	return ethnl_bitset32_size(&data->msg_mask, NULL, NETIF_MSG_CLASS_COUNT,
				   netif_msg_class_names, compact);
}

static int debug_fill_reply(struct sk_buff *skb,
			    const struct ethnl_req_info *req_base,
			    const struct ethnl_reply_data *reply_base)
{
	const struct debug_reply_data *data = DEBUG_REPDATA(reply_base);
	bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;

	return ethnl_put_bitset32(skb, ETHTOOL_A_DEBUG_MSGMASK, &data->msg_mask,
				  NULL, NETIF_MSG_CLASS_COUNT,
				  netif_msg_class_names, compact);
}

const struct ethnl_request_ops ethnl_debug_request_ops = {
	.request_cmd		= ETHTOOL_MSG_DEBUG_GET,
	.reply_cmd		= ETHTOOL_MSG_DEBUG_GET_REPLY,
	.hdr_attr		= ETHTOOL_A_DEBUG_HEADER,
	.max_attr		= ETHTOOL_A_DEBUG_MAX,
	.req_info_size		= sizeof(struct debug_req_info),
	.reply_data_size	= sizeof(struct debug_reply_data),
	.request_policy		= debug_get_policy,

	.prepare_data		= debug_prepare_data,
	.reply_size		= debug_reply_size,
	.fill_reply		= debug_fill_reply,
};

/* DEBUG_SET */

static const struct nla_policy
debug_set_policy[ETHTOOL_A_DEBUG_MAX + 1] = {
	[ETHTOOL_A_DEBUG_UNSPEC]	= { .type = NLA_REJECT },
	[ETHTOOL_A_DEBUG_HEADER]	= { .type = NLA_NESTED },
	[ETHTOOL_A_DEBUG_MSGMASK]	= { .type = NLA_NESTED },
};

int ethnl_set_debug(struct sk_buff *skb, struct genl_info *info)
{
	struct nlattr *tb[ETHTOOL_A_DEBUG_MAX + 1];
	struct ethnl_req_info req_info = {};
	struct net_device *dev;
	bool mod = false;
	u32 msg_mask;
	int ret;

	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
			  ETHTOOL_A_DEBUG_MAX, debug_set_policy,
			  info->extack);
	if (ret < 0)
		return ret;
	ret = ethnl_parse_header(&req_info, tb[ETHTOOL_A_DEBUG_HEADER],
				 genl_info_net(info), info->extack, true);
	if (ret < 0)
		return ret;
	dev = req_info.dev;
	ret = -EOPNOTSUPP;
	if (!dev->ethtool_ops->get_msglevel || !dev->ethtool_ops->set_msglevel)
		goto out_dev;

	rtnl_lock();
	ret = ethnl_ops_begin(dev);
	if (ret < 0)
		goto out_rtnl;

	msg_mask = dev->ethtool_ops->get_msglevel(dev);
	ret = ethnl_update_bitset32(&msg_mask, NETIF_MSG_CLASS_COUNT,
				    tb[ETHTOOL_A_DEBUG_MSGMASK],
				    netif_msg_class_names, info->extack, &mod);
	if (ret < 0 || !mod)
		goto out_ops;

	dev->ethtool_ops->set_msglevel(dev, msg_mask);
	ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);

out_ops:
	ethnl_ops_complete(dev);
out_rtnl:
	rtnl_unlock();
out_dev:
	dev_put(dev);
	return ret;
}
Commit	Line	Data
6a94b8cc MK	1	// SPDX-License-Identifier: GPL-2.0-only
	2
	3	#include "netlink.h"
	4	#include "common.h"
	5	#include "bitset.h"
	6
	7	struct debug_req_info {
	8	struct ethnl_req_info base;
	9	};
	10
	11	struct debug_reply_data {
	12	struct ethnl_reply_data base;
	13	u32 msg_mask;
	14	};
	15
	16	#define DEBUG_REPDATA(__reply_base) \
	17	container_of(__reply_base, struct debug_reply_data, base)
	18
	19	static const struct nla_policy
	20	debug_get_policy[ETHTOOL_A_DEBUG_MAX + 1] = {
	21	[ETHTOOL_A_DEBUG_UNSPEC] = { .type = NLA_REJECT },
	22	[ETHTOOL_A_DEBUG_HEADER] = { .type = NLA_NESTED },
	23	[ETHTOOL_A_DEBUG_MSGMASK] = { .type = NLA_REJECT },
	24	};
	25
	26	static int debug_prepare_data(const struct ethnl_req_info *req_base,
	27	struct ethnl_reply_data *reply_base,
	28	struct genl_info *info)
	29	{
	30	struct debug_reply_data *data = DEBUG_REPDATA(reply_base);
	31	struct net_device *dev = reply_base->dev;
	32	int ret;
	33
	34	if (!dev->ethtool_ops->get_msglevel)
	35	return -EOPNOTSUPP;
	36
	37	ret = ethnl_ops_begin(dev);
	38	if (ret < 0)
	39	return ret;
	40	data->msg_mask = dev->ethtool_ops->get_msglevel(dev);
	41	ethnl_ops_complete(dev);
	42
	43	return 0;
	44	}
	45
	46	static int debug_reply_size(const struct ethnl_req_info *req_base,
	47	const struct ethnl_reply_data *reply_base)
	48	{
	49	const struct debug_reply_data *data = DEBUG_REPDATA(reply_base);
	50	bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
	51
	52	return ethnl_bitset32_size(&data->msg_mask, NULL, NETIF_MSG_CLASS_COUNT,
	53	netif_msg_class_names, compact);
	54	}
	55
	56	static int debug_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 debug_reply_data *data = DEBUG_REPDATA(reply_base);
	61	bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
	62
	63	return ethnl_put_bitset32(skb, ETHTOOL_A_DEBUG_MSGMASK, &data->msg_mask,
	64	NULL, NETIF_MSG_CLASS_COUNT,
65	netif_msg_class_names, compact);
66	}
67
68	const struct ethnl_request_ops ethnl_debug_request_ops = {
69	.request_cmd = ETHTOOL_MSG_DEBUG_GET,
70	.reply_cmd = ETHTOOL_MSG_DEBUG_GET_REPLY,
71	.hdr_attr = ETHTOOL_A_DEBUG_HEADER,
72	.max_attr = ETHTOOL_A_DEBUG_MAX,
73	.req_info_size = sizeof(struct debug_req_info),
74	.reply_data_size = sizeof(struct debug_reply_data),
75	.request_policy = debug_get_policy,
76
77	.prepare_data = debug_prepare_data,
78	.reply_size = debug_reply_size,
79	.fill_reply = debug_fill_reply,
80	};
e54d04e3 MK	81
	82	/* DEBUG_SET */
	83
	84	static const struct nla_policy
	85	debug_set_policy[ETHTOOL_A_DEBUG_MAX + 1] = {
	86	[ETHTOOL_A_DEBUG_UNSPEC] = { .type = NLA_REJECT },
	87	[ETHTOOL_A_DEBUG_HEADER] = { .type = NLA_NESTED },
	88	[ETHTOOL_A_DEBUG_MSGMASK] = { .type = NLA_NESTED },
	89	};
	90
	91	int ethnl_set_debug(struct sk_buff skb, struct genl_info info)
	92	{
	93	struct nlattr *tb[ETHTOOL_A_DEBUG_MAX + 1];
	94	struct ethnl_req_info req_info = {};
	95	struct net_device *dev;
	96	bool mod = false;
	97	u32 msg_mask;
	98	int ret;
	99
	100	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
	101	ETHTOOL_A_DEBUG_MAX, debug_set_policy,
	102	info->extack);
	103	if (ret < 0)
	104	return ret;
	105	ret = ethnl_parse_header(&req_info, tb[ETHTOOL_A_DEBUG_HEADER],
	106	genl_info_net(info), info->extack, true);
	107	if (ret < 0)
	108	return ret;
	109	dev = req_info.dev;
2f599ec4	110	ret = -EOPNOTSUPP;
e54d04e3	111	if (!dev->ethtool_ops->get_msglevel \|\| !dev->ethtool_ops->set_msglevel)
2f599ec4	112	goto out_dev;
e54d04e3 MK	113
	114	rtnl_lock();
	115	ret = ethnl_ops_begin(dev);
	116	if (ret < 0)
	117	goto out_rtnl;
	118
	119	msg_mask = dev->ethtool_ops->get_msglevel(dev);
	120	ret = ethnl_update_bitset32(&msg_mask, NETIF_MSG_CLASS_COUNT,
	121	tb[ETHTOOL_A_DEBUG_MSGMASK],
	122	netif_msg_class_names, info->extack, &mod);
	123	if (ret < 0 \|\| !mod)
	124	goto out_ops;
	125
	126	dev->ethtool_ops->set_msglevel(dev, msg_mask);
0bda7af3	127	ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
e54d04e3 MK	128
	129	out_ops:
	130	ethnl_ops_complete(dev);
	131	out_rtnl:
	132	rtnl_unlock();
2f599ec4	133	out_dev:
e54d04e3 MK	134	dev_put(dev);
	135	return ret;
	136	}