From: Amery Hung <ameryhung@gmail.com>
To: netdev@vger.kernel.org
Cc: bpf@vger.kernel.org, daniel@iogearbox.net, andrii@kernel.org,
alexei.starovoitov@gmail.com, martin.lau@kernel.org,
kuba@kernel.org, edumazet@google.com, xiyou.wangcong@gmail.com,
cong.wang@bytedance.com, jhs@mojatatu.com, sinquersw@gmail.com,
toke@redhat.com, jiri@resnulli.us, stfomichev@gmail.com,
ekarani.silvestre@ccc.ufcg.edu.br, yangpeihao@sjtu.edu.cn,
yepeilin.cs@gmail.com, ming.lei@redhat.com,
kernel-team@meta.com
Subject: Re: [PATCH bpf-next v3 18/18] selftests/bpf: Test attaching bpf qdisc to mq and non root
Date: Fri, 31 Jan 2025 16:45:11 -0800 [thread overview]
Message-ID: <CAMB2axPNe0MK-_T6Dw3ioCLJD3VcPEMiHnv9Kyp4RYFqngoz+w@mail.gmail.com> (raw)
In-Reply-To: <20250131192912.133796-19-ameryhung@gmail.com>
On Fri, Jan 31, 2025 at 11:29 AM Amery Hung <ameryhung@gmail.com> wrote:
>
> Until we are certain that existing classful qdiscs work with bpf qdisc,
> make sure we don't allow attaching a bpf qdisc to non root. Meanwhile,
> attaching to mq is allowed.
>
> Signed-off-by: Amery Hung <ameryhung@gmail.com>
> ---
> tools/testing/selftests/bpf/config | 1 +
> .../selftests/bpf/prog_tests/bpf_qdisc.c | 111 +++++++++++++++++-
> 2 files changed, 110 insertions(+), 2 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/config b/tools/testing/selftests/bpf/config
> index 6b0cab55bd2d..3201a962b3dc 100644
> --- a/tools/testing/selftests/bpf/config
> +++ b/tools/testing/selftests/bpf/config
> @@ -74,6 +74,7 @@ CONFIG_NET_MPLS_GSO=y
> CONFIG_NET_SCH_BPF=y
> CONFIG_NET_SCH_FQ=y
> CONFIG_NET_SCH_INGRESS=y
> +CONFIG_NET_SCH_HTB=y
> CONFIG_NET_SCHED=y
> CONFIG_NETDEVSIM=y
> CONFIG_NETFILTER=y
> diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_qdisc.c b/tools/testing/selftests/bpf/prog_tests/bpf_qdisc.c
> index 7e8e3170e6b6..f3158170edff 100644
> --- a/tools/testing/selftests/bpf/prog_tests/bpf_qdisc.c
> +++ b/tools/testing/selftests/bpf/prog_tests/bpf_qdisc.c
> @@ -86,18 +86,125 @@ static void test_fq(void)
> bpf_qdisc_fq__destroy(fq_skel);
> }
>
> +static int netdevsim_write_cmd(const char *path, const char *cmd)
> +{
> + FILE *fp;
> +
> + fp = fopen(path, "w");
> + if (!ASSERT_OK_PTR(fp, "write_netdevsim_cmd"))
> + return -errno;
> +
> + fprintf(fp, cmd);
> + fclose(fp);
> + return 0;
> +}
> +
I will replace netdevsim with veth for attaching mq. The function
above that failed to compile in CI will also go.
> +static void test_qdisc_attach_to_mq(void)
> +{
> + DECLARE_LIBBPF_OPTS(bpf_tc_hook, hook,
> + .attach_point = BPF_TC_QDISC,
> + .parent = 0x00010001,
> + .handle = 0x8000000,
> + .qdisc = "bpf_fifo");
> + struct bpf_qdisc_fifo *fifo_skel;
> + struct bpf_link *link;
> + int err;
> +
> + hook.ifindex = if_nametoindex("eni1np1");
> + if (!ASSERT_NEQ(hook.ifindex, 0, "if_nametoindex"))
> + return;
> +
> + fifo_skel = bpf_qdisc_fifo__open_and_load();
> + if (!ASSERT_OK_PTR(fifo_skel, "bpf_qdisc_fifo__open_and_load"))
> + return;
> +
> + link = bpf_map__attach_struct_ops(fifo_skel->maps.fifo);
> + if (!ASSERT_OK_PTR(link, "bpf_map__attach_struct_ops")) {
> + bpf_qdisc_fifo__destroy(fifo_skel);
> + return;
> + }
> +
> + ASSERT_OK(system("tc qdisc add dev eni1np1 root handle 1: mq"), "create mq");
> +
> + err = bpf_tc_hook_create(&hook);
> + ASSERT_OK(err, "attach qdisc");
> +
> + bpf_tc_hook_destroy(&hook);
> +
> + ASSERT_OK(system("tc qdisc delete dev eni1np1 root mq"), "delete mq");
> +
> + bpf_link__destroy(link);
> + bpf_qdisc_fifo__destroy(fifo_skel);
> +}
> +
> +static void test_qdisc_attach_to_non_root(void)
> +{
> + DECLARE_LIBBPF_OPTS(bpf_tc_hook, hook, .ifindex = LO_IFINDEX,
> + .attach_point = BPF_TC_QDISC,
> + .parent = 0x00010001,
> + .handle = 0x8000000,
> + .qdisc = "bpf_fifo");
> + struct bpf_qdisc_fifo *fifo_skel;
> + struct bpf_link *link;
> + int err;
> +
> + fifo_skel = bpf_qdisc_fifo__open_and_load();
> + if (!ASSERT_OK_PTR(fifo_skel, "bpf_qdisc_fifo__open_and_load"))
> + return;
> +
> + link = bpf_map__attach_struct_ops(fifo_skel->maps.fifo);
> + if (!ASSERT_OK_PTR(link, "bpf_map__attach_struct_ops")) {
> + bpf_qdisc_fifo__destroy(fifo_skel);
> + return;
> + }
> +
> + ASSERT_OK(system("tc qdisc add dev lo root handle 1: htb"), "create htb");
> + ASSERT_OK(system("tc class add dev lo parent 1: classid 1:1 htb rate 75Kbit"), "create htb class");
> +
> + err = bpf_tc_hook_create(&hook);
> + ASSERT_ERR(err, "attach qdisc");
> +
> + bpf_tc_hook_destroy(&hook);
> +
> + ASSERT_OK(system("tc qdisc delete dev lo root htb"), "delete htb");
> +
> + bpf_link__destroy(link);
> + bpf_qdisc_fifo__destroy(fifo_skel);
> +}
> +
> void test_bpf_qdisc(void)
> {
> + struct nstoken *nstoken = NULL;
> struct netns_obj *netns;
> + int err;
>
> - netns = netns_new("bpf_qdisc_ns", true);
> + netns = netns_new("bpf_qdisc_ns", false);
> if (!ASSERT_OK_PTR(netns, "netns_new"))
> return;
>
> + err = netdevsim_write_cmd("/sys/bus/netdevsim/new_device", "1 1 4");
> + if (!ASSERT_OK(err, "create netdevsim")) {
> + netns_free(netns);
> + return;
> + }
> +
> + ASSERT_OK(system("ip link set eni1np1 netns bpf_qdisc_ns"), "ip link set netdevsim");
> +
> + nstoken = open_netns("bpf_qdisc_ns");
> + if (!ASSERT_OK_PTR(nstoken, "open_netns"))
> + goto out;
> +
> if (test__start_subtest("fifo"))
> test_fifo();
> if (test__start_subtest("fq"))
> test_fq();
> -
> + if (test__start_subtest("attach to mq"))
> + test_qdisc_attach_to_mq();
> + if (test__start_subtest("attach to non root"))
> + test_qdisc_attach_to_non_root();
> +
> +out:
> + err = netdevsim_write_cmd("/sys/bus/netdevsim/del_device", "1");
> + ASSERT_OK(err, "delete netdevsim");
> netns_free(netns);
> }
> --
> 2.47.1
>
next prev parent reply other threads:[~2025-02-01 0:45 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-31 19:28 [PATCH bpf-next v3 00/18] bpf qdisc Amery Hung
2025-01-31 19:28 ` [PATCH bpf-next v3 01/18] bpf: Make every prog keep a copy of ctx_arg_info Amery Hung
2025-02-04 5:57 ` Eduard Zingerman
2025-01-31 19:28 ` [PATCH bpf-next v3 02/18] bpf: Support getting referenced kptr from struct_ops argument Amery Hung
2025-02-04 5:57 ` Eduard Zingerman
2025-01-31 19:28 ` [PATCH bpf-next v3 03/18] selftests/bpf: Test referenced kptr arguments of struct_ops programs Amery Hung
2025-02-04 5:58 ` Eduard Zingerman
2025-01-31 19:28 ` [PATCH bpf-next v3 04/18] bpf: Allow struct_ops prog to return referenced kptr Amery Hung
2025-02-04 5:58 ` Eduard Zingerman
2025-01-31 19:28 ` [PATCH bpf-next v3 05/18] selftests/bpf: Test returning referenced kptr from struct_ops programs Amery Hung
2025-02-04 5:58 ` Eduard Zingerman
2025-01-31 19:28 ` [PATCH bpf-next v3 06/18] bpf: Prepare to reuse get_ctx_arg_idx Amery Hung
2025-01-31 19:28 ` [PATCH bpf-next v3 07/18] bpf: Generalize finding member offset of struct_ops prog Amery Hung
2025-02-04 5:59 ` Eduard Zingerman
2025-01-31 19:28 ` [PATCH bpf-next v3 08/18] bpf: net_sched: Support implementation of Qdisc_ops in bpf Amery Hung
2025-02-04 22:18 ` Jakub Kicinski
2025-02-04 23:21 ` Amery Hung
2025-02-05 1:27 ` Jakub Kicinski
2025-02-05 4:13 ` Amery Hung
2025-01-31 19:28 ` [PATCH bpf-next v3 09/18] bpf: net_sched: Add basic bpf qdisc kfuncs Amery Hung
2025-01-31 19:28 ` [PATCH bpf-next v3 10/18] bpf: Search and add kfuncs in struct_ops prologue and epilogue Amery Hung
2025-02-04 5:59 ` Eduard Zingerman
2025-01-31 19:28 ` [PATCH bpf-next v3 11/18] bpf: net_sched: Add a qdisc watchdog timer Amery Hung
2025-01-31 19:28 ` [PATCH bpf-next v3 12/18] bpf: net_sched: Support updating bstats Amery Hung
2025-01-31 19:28 ` [PATCH bpf-next v3 13/18] bpf: net_sched: Support updating qstats Amery Hung
2025-01-31 19:28 ` [PATCH bpf-next v3 14/18] bpf: net_sched: Allow writing to more Qdisc members Amery Hung
2025-01-31 19:28 ` [PATCH bpf-next v3 15/18] libbpf: Support creating and destroying qdisc Amery Hung
2025-01-31 19:28 ` [PATCH bpf-next v3 16/18] selftests/bpf: Add a basic fifo qdisc test Amery Hung
2025-01-31 19:28 ` [PATCH bpf-next v3 17/18] selftests/bpf: Add a bpf fq qdisc to selftest Amery Hung
2025-01-31 19:28 ` [PATCH bpf-next v3 18/18] selftests/bpf: Test attaching bpf qdisc to mq and non root Amery Hung
2025-02-01 0:45 ` Amery Hung [this message]
2025-02-04 5:58 ` Eduard Zingerman
2025-02-04 18:17 ` Amery Hung
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