netdev - Re: [RFC PATCH net-next 15/15] bpf: Sample bpf program to set sndcwnd clamp

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Message-Id: <20170613.173206.1185302030405741253.davem@davemloft.net>
Date:   Tue, 13 Jun 2017 17:32:06 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     brakmo@...com
Cc:     netdev@...r.kernel.org, kernel-team@...com, bmatheny@...com,
        ast@...com, daniel@...earbox.net, dsa@...ulusnetworks.com
Subject: Re: [RFC PATCH net-next 15/15] bpf: Sample bpf program to set
 sndcwnd clamp

From: Lawrence Brakmo <brakmo@...com>
Date: Tue, 13 Jun 2017 11:00:04 -0700

> +SEC("sockops")
> +int bpf_clamp(struct __sk_buff *skb)
> +{
> +	struct bpf_socket_ops *skops = (struct bpf_socket_ops *) skb;
> +	char fmt1[] = "BPF command: %d\n";
> +	char fmt2[] = "  Returning %d\n";
> +	int op;
> +	int rv = 0;
> +	int bufsize = 150000;
> +	int clamp = 100;
> +	int to_init = 10;
> +
> +	// For testing purposes, only execute rest of BPF program
> +	// if neither port numberis 55601
> +	if (skops->remote_port != 55601 && skops->local_port != 55601)
> +		return -1;

Local variable ordering and C++ comments.