net/devlink/dpipe.c

Source file repositories/reference/linux-study-clean/net/devlink/dpipe.c

File Facts

System
Linux kernel
Corpus path
net/devlink/dpipe.c
Extension
.c
Size
23470 bytes
Lines
916
Domain
Networking Core
Bucket
Sockets, Protocols, Packet Path, And Network Policy
Inferred role
Networking Core: exported/initcall integration point
Status
integration 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

if (!table_name) {
			err = devlink_dpipe_table_put(skb, table);
			if (err) {
				if (!i)
					goto err_table_put;
				incomplete = true;
				break;
			}
		} else {
			if (!strcmp(table->name, table_name)) {
				err = devlink_dpipe_table_put(skb, table);
				if (err)
					break;
			}
		}
		i++;
	}

	nla_nest_end(skb, tables_attr);
	genlmsg_end(skb, hdr);
	if (incomplete)
		goto start_again;

send_done:
	nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
			NLMSG_DONE, 0, flags | NLM_F_MULTI);
	if (!nlh) {
		err = devlink_dpipe_send_and_alloc_skb(&skb, info);
		if (err)
			return err;
		goto send_done;
	}

	return genlmsg_reply(skb, info);

nla_put_failure:
	err = -EMSGSIZE;
err_table_put:
	nlmsg_free(skb);
	return err;
}

int devlink_nl_dpipe_table_get_doit(struct sk_buff *skb, struct genl_info *info)
{
	struct devlink *devlink = info->user_ptr[0];
	const char *table_name =  NULL;

	if (info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
		table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);

	return devlink_dpipe_tables_fill(info, DEVLINK_CMD_DPIPE_TABLE_GET, 0,
					 &devlink->dpipe_table_list,
					 table_name);
}

static int devlink_dpipe_value_put(struct sk_buff *skb,
				   struct devlink_dpipe_value *value)
{
	if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE,
		    value->value_size, value->value))
		return -EMSGSIZE;
	if (value->mask)
		if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE_MASK,
			    value->value_size, value->mask))
			return -EMSGSIZE;
	if (value->mapping_valid)
		if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_VALUE_MAPPING,
				value->mapping_value))
			return -EMSGSIZE;
	return 0;
}

static int devlink_dpipe_action_value_put(struct sk_buff *skb,
					  struct devlink_dpipe_value *value)
{
	if (!value->action)
		return -EINVAL;
	if (devlink_dpipe_action_put(skb, value->action))
		return -EMSGSIZE;
	if (devlink_dpipe_value_put(skb, value))
		return -EMSGSIZE;
	return 0;
}

static int devlink_dpipe_action_values_put(struct sk_buff *skb,
					   struct devlink_dpipe_value *values,
					   unsigned int values_count)
{
	struct nlattr *action_attr;
	int i;

Annotation

Implementation Notes