net/ethtool/module.c

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

File Facts

System
Linux kernel
Corpus path
net/ethtool/module.c
Extension
.c
Size
14805 bytes
Lines
567
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 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;

	if (dev->ethtool->module_fw_flash_in_progress) {
		NL_SET_ERR_MSG(extack,
			       "Module firmware flashing is in progress");
		return -EBUSY;
	}

	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,
			       const struct genl_info *info)
{
	struct module_reply_data *data = MODULE_REPDATA(reply_base);
	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, info->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;
}

Annotation

Implementation Notes