net/ethtool/debug.c

Source file repositories/reference/linux-study-clean/net/ethtool/debug.c

File Facts

System
Linux kernel
Corpus path
net/ethtool/debug.c
Extension
.c
Size
3187 bytes
Lines
118
Domain
Networking Core
Bucket
Sockets, Protocols, Packet Path, And Network Policy
Inferred role
Networking Core: implementation source
Status
source implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

Dependency Surface

Detected Declarations

Annotated Snippet

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)

const struct nla_policy ethnl_debug_get_policy[] = {
	[ETHTOOL_A_DEBUG_HEADER]	=
		NLA_POLICY_NESTED(ethnl_header_policy),
};

static int debug_prepare_data(const struct ethnl_req_info *req_base,
			      struct ethnl_reply_data *reply_base,
			      const 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);
}

/* DEBUG_SET */

const struct nla_policy ethnl_debug_set_policy[] = {
	[ETHTOOL_A_DEBUG_HEADER]	=
		NLA_POLICY_NESTED(ethnl_header_policy),
	[ETHTOOL_A_DEBUG_MSGMASK]	= { .type = NLA_NESTED },
};

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

	return ops->get_msglevel && ops->set_msglevel ? 1 : -EOPNOTSUPP;
}

static int
ethnl_set_debug(struct ethnl_req_info *req_info, struct genl_info *info)
{
	struct net_device *dev = req_info->dev;
	struct nlattr **tb = info->attrs;
	bool mod = false;
	u32 msg_mask;
	int ret;

	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)

Annotation

Implementation Notes