mirror of https://github.com/torvalds/linux.git
129 lines
4.0 KiB
C
129 lines
4.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2025 Meta Platforms, Inc. and affiliates. */
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#include <test_progs.h>
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#include "cgroup_helpers.h"
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#include "cgroup_preorder.skel.h"
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static int run_getsockopt_test(int cg_parent, int cg_child, int sock_fd, bool all_preorder)
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{
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LIBBPF_OPTS(bpf_prog_attach_opts, opts);
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enum bpf_attach_type prog_c_atype, prog_c2_atype, prog_p_atype, prog_p2_atype;
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int prog_c_fd, prog_c2_fd, prog_p_fd, prog_p2_fd;
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struct cgroup_preorder *skel = NULL;
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struct bpf_program *prog;
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__u8 *result, buf;
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socklen_t optlen;
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int err = 0;
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skel = cgroup_preorder__open_and_load();
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if (!ASSERT_OK_PTR(skel, "cgroup_preorder__open_and_load"))
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return 0;
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buf = 0x00;
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err = setsockopt(sock_fd, SOL_IP, IP_TOS, &buf, 1);
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if (!ASSERT_OK(err, "setsockopt"))
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goto close_skel;
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opts.flags = BPF_F_ALLOW_MULTI;
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if (all_preorder)
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opts.flags |= BPF_F_PREORDER;
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prog = skel->progs.child;
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prog_c_fd = bpf_program__fd(prog);
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prog_c_atype = bpf_program__expected_attach_type(prog);
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err = bpf_prog_attach_opts(prog_c_fd, cg_child, prog_c_atype, &opts);
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if (!ASSERT_OK(err, "bpf_prog_attach_opts-child"))
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goto close_skel;
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opts.flags = BPF_F_ALLOW_MULTI | BPF_F_PREORDER;
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prog = skel->progs.child_2;
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prog_c2_fd = bpf_program__fd(prog);
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prog_c2_atype = bpf_program__expected_attach_type(prog);
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err = bpf_prog_attach_opts(prog_c2_fd, cg_child, prog_c2_atype, &opts);
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if (!ASSERT_OK(err, "bpf_prog_attach_opts-child_2"))
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goto detach_child;
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optlen = 1;
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err = getsockopt(sock_fd, SOL_IP, IP_TOS, &buf, &optlen);
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if (!ASSERT_OK(err, "getsockopt"))
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goto detach_child_2;
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result = skel->bss->result;
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if (all_preorder)
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ASSERT_TRUE(result[0] == 1 && result[1] == 2, "child only");
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else
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ASSERT_TRUE(result[0] == 2 && result[1] == 1, "child only");
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skel->bss->idx = 0;
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memset(result, 0, 4);
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opts.flags = BPF_F_ALLOW_MULTI;
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if (all_preorder)
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opts.flags |= BPF_F_PREORDER;
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prog = skel->progs.parent;
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prog_p_fd = bpf_program__fd(prog);
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prog_p_atype = bpf_program__expected_attach_type(prog);
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err = bpf_prog_attach_opts(prog_p_fd, cg_parent, prog_p_atype, &opts);
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if (!ASSERT_OK(err, "bpf_prog_attach_opts-parent"))
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goto detach_child_2;
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opts.flags = BPF_F_ALLOW_MULTI | BPF_F_PREORDER;
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prog = skel->progs.parent_2;
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prog_p2_fd = bpf_program__fd(prog);
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prog_p2_atype = bpf_program__expected_attach_type(prog);
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err = bpf_prog_attach_opts(prog_p2_fd, cg_parent, prog_p2_atype, &opts);
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if (!ASSERT_OK(err, "bpf_prog_attach_opts-parent_2"))
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goto detach_parent;
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err = getsockopt(sock_fd, SOL_IP, IP_TOS, &buf, &optlen);
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if (!ASSERT_OK(err, "getsockopt"))
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goto detach_parent_2;
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if (all_preorder)
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ASSERT_TRUE(result[0] == 3 && result[1] == 4 && result[2] == 1 && result[3] == 2,
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"parent and child");
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else
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ASSERT_TRUE(result[0] == 4 && result[1] == 2 && result[2] == 1 && result[3] == 3,
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"parent and child");
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detach_parent_2:
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ASSERT_OK(bpf_prog_detach2(prog_p2_fd, cg_parent, prog_p2_atype),
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"bpf_prog_detach2-parent_2");
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detach_parent:
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ASSERT_OK(bpf_prog_detach2(prog_p_fd, cg_parent, prog_p_atype),
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"bpf_prog_detach2-parent");
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detach_child_2:
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ASSERT_OK(bpf_prog_detach2(prog_c2_fd, cg_child, prog_c2_atype),
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"bpf_prog_detach2-child_2");
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detach_child:
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ASSERT_OK(bpf_prog_detach2(prog_c_fd, cg_child, prog_c_atype),
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"bpf_prog_detach2-child");
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close_skel:
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cgroup_preorder__destroy(skel);
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return err;
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}
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void test_cgroup_preorder(void)
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{
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int cg_parent = -1, cg_child = -1, sock_fd = -1;
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cg_parent = test__join_cgroup("/parent");
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if (!ASSERT_GE(cg_parent, 0, "join_cgroup /parent"))
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goto out;
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cg_child = test__join_cgroup("/parent/child");
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if (!ASSERT_GE(cg_child, 0, "join_cgroup /parent/child"))
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goto out;
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sock_fd = socket(AF_INET, SOCK_STREAM, 0);
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if (!ASSERT_GE(sock_fd, 0, "socket"))
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goto out;
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ASSERT_OK(run_getsockopt_test(cg_parent, cg_child, sock_fd, false), "getsockopt_test_1");
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ASSERT_OK(run_getsockopt_test(cg_parent, cg_child, sock_fd, true), "getsockopt_test_2");
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out:
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close(sock_fd);
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close(cg_child);
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close(cg_parent);
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}
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