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if (attrs[ATTR_OPTS]) {
struct nlattr *nested[NESTED_MAX+1];
struct nla_policy nested_policy[] = {
[NESTED_FOO] = { .type = NLA_U32 },
};
if (nla_parse_nested(nested, NESTED_MAX, attrs[ATTR_OPTS], nested_policy) < 0)
/* error */
if (nested[NESTED_FOO])
uint32_t val = nla_get_u32(nested[NESTED_FOO]);
}
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