netdev - Re: [PATCH v14 net-next 09/12] crypto: chtls

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Message-ID: <20180329162611.GA9517@bistromath.localdomain>
Date:   Thu, 29 Mar 2018 18:26:11 +0200
From:   Sabrina Dubroca <sd@...asysnail.net>
To:     Atul Gupta <atul.gupta@...lsio.com>
Cc:     davem@...emloft.net, herbert@...dor.apana.org.au,
        davejwatson@...com, sbrivio@...hat.com,
        linux-crypto@...r.kernel.org, netdev@...r.kernel.org,
        werner@...lsio.com, leedom@...lsio.com,
        swise@...ngridcomputing.com, indranil@...lsio.com,
        ganeshgr@...lsio.com
Subject: Re: [PATCH v14 net-next 09/12] crypto: chtls - Inline TLS record Tx

2018-03-29, 21:27:51 +0530, Atul Gupta wrote:
> TLS handler for record transmit.
> Create Inline TLS work request and post to FW.
> Create Inline TLS record CPLs for hardware
> 
> Signed-off-by: Atul Gupta <atul.gupta@...lsio.com>
> Signed-off-by: Michael Werner <werner@...lsio.com>
> ---

...
> +int chtls_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
> +{
> +	struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
> +	struct chtls_dev *cdev = csk->cdev;
> +	struct tcp_sock *tp = tcp_sk(sk);
> +	struct sk_buff *skb;
> +	int mss, flags, err;
> +	int recordsz = 0;
> +	int copied = 0;
> +	int hdrlen = 0;
> +	long timeo;
> +
> +	lock_sock(sk);
> +	flags = msg->msg_flags;
> +	timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT);
> +
> +	if (!sk_in_state(sk, TCPF_ESTABLISHED | TCPF_CLOSE_WAIT)) {
> +		err = sk_stream_wait_connect(sk, &timeo);
> +		if (err)
> +			goto out_err;
> +	}
> +
> +	if (sk->sk_prot->sendmsg != chtls_sendmsg) {

Can that actually happen? If so, how? AFAICT, this function is only
called when sk->sk_prot has been set to be chtls_cpl_prot.

> +		release_sock(sk);
> +		if (sk->sk_prot->sendmsg)
> +			return sk->sk_prot->sendmsg(sk, msg, size);
> +		else
> +			return sk->sk_socket->ops->sendmsg(sk->sk_socket,
> +							   msg, size);
> +	}

-- 
Sabrina