netdev - Re: [PATCH 1/4] libbpf: add function to setup XDP

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Message-ID: <94dcaa45-70e0-09bf-ea14-e7cf764b0ee0@lab.ntt.co.jp>
Date:   Thu, 28 Dec 2017 09:59:58 +0900
From:   Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
To:     Eric Leblond <eric@...it.org>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     netdev@...r.kernel.org, daniel@...earbox.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] libbpf: add function to setup XDP

On 2017/12/28 3:02, Eric Leblond wrote:
> Most of the code is taken from set_link_xdp_fd() in bpf_load.c and
> slightly modified to be library compliant.
> 
> Signed-off-by: Eric Leblond <eric@...it.org>
> ---
...
> +int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags)
...
> +	if (bind(sock, (struct sockaddr *)&sa, sizeof(sa)) < 0) {
> +		ret = -errno;
> +		goto cleanup;
> +	}
> +
> +	addrlen = sizeof(sa);
> +	if (getsockname(sock, (struct sockaddr *)&sa, &addrlen) < 0) {
> +		ret = errno;

forgot to prepend '-'?

> +		goto cleanup;
> +	}
> +
> +	if (addrlen != sizeof(sa)) {
> +		ret = errno;

errno is not set?

> +		goto cleanup;
> +	}

-- 
Toshiaki Makita