int req_capsule_get_size(const struct req_capsule *pill,
const struct req_msg_field *field,
enum req_location loc);
+int req_capsule_msg_size(const struct req_capsule *pill, enum req_location loc);
+int req_capsule_fmt_size(__u32 magic, const struct req_format *fmt,
+ enum req_location loc);
void req_capsule_extend(struct req_capsule *pill, const struct req_format *fmt);
int req_capsule_has_field(const struct req_capsule *pill,