netdev - Re: [PATCH bpf-next 1/3] selftests/bpf: rewrite test_sock

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Date:   Tue, 1 Dec 2020 16:26:45 -0800
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Stanislav Fomichev <sdf@...gle.com>
Cc:     Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>
Subject: Re: [PATCH bpf-next 1/3] selftests/bpf: rewrite test_sock_addr bind
 bpf into C

On Tue, Nov 17, 2020 at 4:20 PM Stanislav Fomichev <sdf@...gle.com> wrote:
>
> I'm planning to extend it in the next patches. It's much easier to
> work with C than BPF assembly.
>
> Signed-off-by: Stanislav Fomichev <sdf@...gle.com>
> ---

With nits below:

Acked-by: Andrii Nakryiko <andrii@...nel.org>


>  .../testing/selftests/bpf/progs/bind4_prog.c  |  73 +++++++
>  .../testing/selftests/bpf/progs/bind6_prog.c  |  90 ++++++++
>  tools/testing/selftests/bpf/test_sock_addr.c  | 196 ++----------------
>  3 files changed, 175 insertions(+), 184 deletions(-)
>  create mode 100644 tools/testing/selftests/bpf/progs/bind4_prog.c
>  create mode 100644 tools/testing/selftests/bpf/progs/bind6_prog.c
>
> diff --git a/tools/testing/selftests/bpf/progs/bind4_prog.c b/tools/testing/selftests/bpf/progs/bind4_prog.c
> new file mode 100644
> index 000000000000..ff3def2ee6f9
> --- /dev/null
> +++ b/tools/testing/selftests/bpf/progs/bind4_prog.c
> @@ -0,0 +1,73 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +#include <string.h>
> +
> +#include <linux/stddef.h>
> +#include <linux/bpf.h>
> +#include <linux/in.h>
> +#include <linux/in6.h>
> +#include <sys/socket.h>
> +#include <netinet/tcp.h>
> +#include <linux/if.h>
> +#include <errno.h>
> +
> +#include <bpf/bpf_helpers.h>
> +#include <bpf/bpf_endian.h>
> +
> +#define SERV4_IP               0xc0a801feU /* 192.168.1.254 */
> +#define SERV4_PORT             4040
> +#define SERV4_REWRITE_IP       0x7f000001U /* 127.0.0.1 */
> +#define SERV4_REWRITE_PORT     4444
> +
> +int _version SEC("version") = 1;

not needed, let's not add it to a new test prog

> +

[...]

> diff --git a/tools/testing/selftests/bpf/progs/bind6_prog.c b/tools/testing/selftests/bpf/progs/bind6_prog.c
> new file mode 100644
> index 000000000000..97686baaae65
> --- /dev/null
> +++ b/tools/testing/selftests/bpf/progs/bind6_prog.c
> @@ -0,0 +1,90 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +#include <string.h>
> +
> +#include <linux/stddef.h>
> +#include <linux/bpf.h>
> +#include <linux/in.h>
> +#include <linux/in6.h>
> +#include <sys/socket.h>
> +#include <netinet/tcp.h>
> +#include <linux/if.h>
> +#include <errno.h>
> +
> +#include <bpf/bpf_helpers.h>
> +#include <bpf/bpf_endian.h>
> +
> +#define SERV6_IP_0             0xfaceb00c /* face:b00c:1234:5678::abcd */
> +#define SERV6_IP_1             0x12345678
> +#define SERV6_IP_2             0x00000000
> +#define SERV6_IP_3             0x0000abcd
> +#define SERV6_PORT             6060
> +#define SERV6_REWRITE_IP_0     0x00000000
> +#define SERV6_REWRITE_IP_1     0x00000000
> +#define SERV6_REWRITE_IP_2     0x00000000
> +#define SERV6_REWRITE_IP_3     0x00000001
> +#define SERV6_REWRITE_PORT     6666
> +
> +int _version SEC("version") = 1;

same

> +
> +SEC("cgroup/bind6")
> +int bind_v6_prog(struct bpf_sock_addr *ctx)
> +{

[...]