netdev - Re: [RFC PATCH net-next 09/15] bpf: Sample BPF program to set buffer sizes

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Message-Id: <20170613.171707.2024415777832835116.davem@davemloft.net>
Date:   Tue, 13 Jun 2017 17:17:07 -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 09/15] bpf: Sample BPF program to set
 buffer sizes

From: Lawrence Brakmo <brakmo@...com>
Date: Tue, 13 Jun 2017 10:59:58 -0700

> diff --git a/samples/bpf/tcp_bufs_kern.c b/samples/bpf/tcp_bufs_kern.c
> new file mode 100644
> index 0000000..a407b73
> --- /dev/null
> +++ b/samples/bpf/tcp_bufs_kern.c
...
> +SEC("sockops")
> +int bpf_bufs(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 rwnd_init = 40;
> +	int bufsize = 1500000;
> +
> +	// For testing purposes, only execute rest of BPF program
> +	// if neither port numberis 55601

Local variable ordering and C++ comments.

Thanks.