sk_msg_trim
void sk_msg_trim(struct sock *sk, struct sk_msg *msg, int len);
EXPORT_SYMBOL_GPL(sk_msg_trim);
sk_msg_trim(sk, msg, osize);
sk_msg_trim(sk, msg_tx, osize);
sk_msg_trim(sk, msg_en,
sk_msg_trim(sk, msg_pl, orig_size);
sk_msg_trim(sk, msg_en,
sk_msg_trim(sk, &rec->msg_plaintext, target_size);
sk_msg_trim(sk, &rec->msg_encrypted, target_size);
sk_msg_trim(sk, msg_en, msg_pl->sg.size +
sk_msg_trim(sk, msg_en, msg_pl->sg.size + prot->overhead_size);
sk_msg_trim(sk, enc, enc->sg.size - delta);