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AJvYcCUvZpl/Xnnunuh5ao9I95C4K4AmgSS2UxoG5GCJpSNf2+fQzEqjVt+WPZ7JtCBksVTbHZ+TLngJU57lKG41bW0=@vger.kernel.org X-Gm-Message-State: AOJu0YwrvvwZlksptCAwUjWCG5OULiRFyRoWtvyrbmLApgDITugvMWCU S+qZd2gjkqDmoGwhga+XBgZbdVSsxuyVYB2WAWS5xp7QeARFAYd9mjQVUtM+RGs= X-Google-Smtp-Source: AGHT+IGAGrQ7T/LTGDHFLHHxnP/Q17eKGNrI6ExFScNumI/xIpXTn7piGZ925jdHHFgVSgT8qy7eMw== X-Received: by 2002:a17:903:41cc:b0:207:6d2:2645 with SMTP id d9443c01a7336-2076e46177cmr318284595ad.47.1726645555086; Wed, 18 Sep 2024 00:45:55 -0700 (PDT) Received: from C02F52LSML85.bytedance.net ([203.208.167.149]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-20794747379sm60412995ad.288.2024.09.18.00.45.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Sep 2024 00:45:54 -0700 (PDT) From: Feng zhou To: martin.lau@linux.dev, daniel@iogearbox.net, john.fastabend@gmail.com, ast@kernel.org, andrii@kernel.org, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, mykolal@fb.com, shuah@kernel.org, geliang@kernel.org, laoar.shao@gmail.com Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, yangzhenze@bytedance.com, wangdongdong.6@bytedance.com, zhoufeng.zf@bytedance.com Subject: [PATCH bpf-next v2 2/2] bpf, selftests: Add test case for cgroup skb to get net_cls classid helpers Date: Wed, 18 Sep 2024 15:45:15 +0800 Message-Id: <20240918074516.5697-3-zhoufeng.zf@bytedance.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20240918074516.5697-1-zhoufeng.zf@bytedance.com> References: <20240918074516.5697-1-zhoufeng.zf@bytedance.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Feng Zhou This patch adds a test for cgroup skb to get classid. Signed-off-by: Feng Zhou --- .../bpf/prog_tests/cg_skb_get_classid.c | 87 +++++++++++++++++++ .../selftests/bpf/progs/cg_skb_get_classid.c | 19 ++++ 2 files changed, 106 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/cg_skb_get_classid.c create mode 100644 tools/testing/selftests/bpf/progs/cg_skb_get_classid.c diff --git a/tools/testing/selftests/bpf/prog_tests/cg_skb_get_classid.c b/tools/testing/selftests/bpf/prog_tests/cg_skb_get_classid.c new file mode 100644 index 000000000000..13a5943c387d --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/cg_skb_get_classid.c @@ -0,0 +1,87 @@ +// SPDX-License-Identifier: GPL-2.0-only + +/* + * Copyright 2024 Bytedance. + */ + +#include + +#include "cg_skb_get_classid.skel.h" + +#include "cgroup_helpers.h" +#include "network_helpers.h" + +static int run_test(int cgroup_fd, int server_fd) +{ + struct cg_skb_get_classid *skel; + int fd, err = 0; + + skel = cg_skb_get_classid__open_and_load(); + if (!ASSERT_OK_PTR(skel, "skel_open")) + return -1; + + skel->links.cg_skb_classid = + bpf_program__attach_cgroup(skel->progs.cg_skb_classid, + cgroup_fd); + if (!ASSERT_OK_PTR(skel->links.cg_skb_classid, "prog_attach")) { + err = -1; + goto out; + } + + if (!ASSERT_OK(join_classid(), "join_classid")) { + err = -1; + goto out; + } + + errno = 0; + fd = connect_to_fd_opts(server_fd, NULL); + if (fd >= 0) { + if (skel->bss->classid != getpid()) { + log_err("Get unexpected classid"); + err = -1; + } + + close(fd); + } else { + log_err("Unexpected errno from connect to server"); + err = -1; + } +out: + cg_skb_get_classid__destroy(skel); + return err; +} + +void test_cg_skb_get_classid(void) +{ + struct network_helper_opts opts = {}; + int server_fd, client_fd, cgroup_fd; + static const int port = 60120; + + /* Step 1: Check base connectivity works without any BPF. */ + server_fd = start_server(AF_INET, SOCK_STREAM, NULL, port, 0); + if (!ASSERT_GE(server_fd, 0, "server_fd")) + return; + client_fd = connect_to_fd_opts(server_fd, &opts); + if (!ASSERT_GE(client_fd, 0, "client_fd")) { + close(server_fd); + return; + } + close(client_fd); + close(server_fd); + + /* Step 2: Check BPF prog attached to cgroups. */ + cgroup_fd = test__join_cgroup("/cg_skb_get_classid"); + if (!ASSERT_GE(cgroup_fd, 0, "cgroup_fd")) + return; + server_fd = start_server(AF_INET, SOCK_STREAM, NULL, port, 0); + if (!ASSERT_GE(server_fd, 0, "server_fd")) { + close(cgroup_fd); + return; + } + setup_classid_environment(); + set_classid(); + ASSERT_OK(run_test(cgroup_fd, server_fd), "cg_skb_get_classid"); + cleanup_classid_environment(); + close(server_fd); + close(cgroup_fd); +} diff --git a/tools/testing/selftests/bpf/progs/cg_skb_get_classid.c b/tools/testing/selftests/bpf/progs/cg_skb_get_classid.c new file mode 100644 index 000000000000..aef0265d24eb --- /dev/null +++ b/tools/testing/selftests/bpf/progs/cg_skb_get_classid.c @@ -0,0 +1,19 @@ +// SPDX-License-Identifier: GPL-2.0-only + +/* + * Copyright 2024 Bytedance. + */ + +#include +#include +#include + +__u32 classid = 0; + +SEC("cgroup_skb/egress") +int cg_skb_classid(struct __sk_buff *ctx) +{ + classid = bpf_skb_cgroup_classid(ctx); + + return 1; +}