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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 | // SPDX-License-Identifier: GPL-2.0 #include <test_progs.h> #include "cgroup_helpers.h" #define FOO "/foo" #define BAR "/foo/bar/" #define PING_CMD "ping -q -c1 -w1 127.0.0.1 > /dev/null" char bpf_log_buf[BPF_LOG_BUF_SIZE]; static int prog_load(int verdict) { struct bpf_insn prog[] = { BPF_MOV64_IMM(BPF_REG_0, verdict), /* r0 = verdict */ BPF_EXIT_INSN(), }; size_t insns_cnt = sizeof(prog) / sizeof(struct bpf_insn); return bpf_load_program(BPF_PROG_TYPE_CGROUP_SKB, prog, insns_cnt, "GPL", 0, bpf_log_buf, BPF_LOG_BUF_SIZE); } void test_cgroup_attach_override(void) { int drop_prog = -1, allow_prog = -1, foo = -1, bar = -1; __u32 duration = 0; allow_prog = prog_load(1); if (CHECK(allow_prog < 0, "prog_load_allow", "verifier output:\n%s\n-------\n", bpf_log_buf)) goto err; drop_prog = prog_load(0); if (CHECK(drop_prog < 0, "prog_load_drop", "verifier output:\n%s\n-------\n", bpf_log_buf)) goto err; foo = test__join_cgroup(FOO); if (CHECK(foo < 0, "cgroup_join_foo", "cgroup setup failed\n")) goto err; if (CHECK(bpf_prog_attach(drop_prog, foo, BPF_CGROUP_INET_EGRESS, BPF_F_ALLOW_OVERRIDE), "prog_attach_drop_foo_override", "attach prog to %s failed, errno=%d\n", FOO, errno)) goto err; if (CHECK(!system(PING_CMD), "ping_fail", "ping unexpectedly succeeded\n")) goto err; bar = test__join_cgroup(BAR); if (CHECK(bar < 0, "cgroup_join_bar", "cgroup setup failed\n")) goto err; if (CHECK(!system(PING_CMD), "ping_fail", "ping unexpectedly succeeded\n")) goto err; if (CHECK(bpf_prog_attach(allow_prog, bar, BPF_CGROUP_INET_EGRESS, BPF_F_ALLOW_OVERRIDE), "prog_attach_allow_bar_override", "attach prog to %s failed, errno=%d\n", BAR, errno)) goto err; if (CHECK(system(PING_CMD), "ping_ok", "ping failed\n")) goto err; if (CHECK(bpf_prog_detach(bar, BPF_CGROUP_INET_EGRESS), "prog_detach_bar", "detach prog from %s failed, errno=%d\n", BAR, errno)) goto err; if (CHECK(!system(PING_CMD), "ping_fail", "ping unexpectedly succeeded\n")) goto err; if (CHECK(bpf_prog_attach(allow_prog, bar, BPF_CGROUP_INET_EGRESS, BPF_F_ALLOW_OVERRIDE), "prog_attach_allow_bar_override", "attach prog to %s failed, errno=%d\n", BAR, errno)) goto err; if (CHECK(bpf_prog_detach(foo, BPF_CGROUP_INET_EGRESS), "prog_detach_foo", "detach prog from %s failed, errno=%d\n", FOO, errno)) goto err; if (CHECK(system(PING_CMD), "ping_ok", "ping failed\n")) goto err; if (CHECK(bpf_prog_attach(allow_prog, bar, BPF_CGROUP_INET_EGRESS, BPF_F_ALLOW_OVERRIDE), "prog_attach_allow_bar_override", "attach prog to %s failed, errno=%d\n", BAR, errno)) goto err; if (CHECK(!bpf_prog_attach(allow_prog, bar, BPF_CGROUP_INET_EGRESS, 0), "fail_prog_attach_allow_bar_none", "attach prog to %s unexpectedly succeeded\n", BAR)) goto err; if (CHECK(bpf_prog_detach(bar, BPF_CGROUP_INET_EGRESS), "prog_detach_bar", "detach prog from %s failed, errno=%d\n", BAR, errno)) goto err; if (CHECK(!bpf_prog_detach(foo, BPF_CGROUP_INET_EGRESS), "fail_prog_detach_foo", "double detach from %s unexpectedly succeeded\n", FOO)) goto err; if (CHECK(bpf_prog_attach(allow_prog, foo, BPF_CGROUP_INET_EGRESS, 0), "prog_attach_allow_foo_none", "attach prog to %s failed, errno=%d\n", FOO, errno)) goto err; if (CHECK(!bpf_prog_attach(allow_prog, bar, BPF_CGROUP_INET_EGRESS, 0), "fail_prog_attach_allow_bar_none", "attach prog to %s unexpectedly succeeded\n", BAR)) goto err; if (CHECK(!bpf_prog_attach(allow_prog, bar, BPF_CGROUP_INET_EGRESS, BPF_F_ALLOW_OVERRIDE), "fail_prog_attach_allow_bar_override", "attach prog to %s unexpectedly succeeded\n", BAR)) goto err; if (CHECK(!bpf_prog_attach(allow_prog, foo, BPF_CGROUP_INET_EGRESS, BPF_F_ALLOW_OVERRIDE), "fail_prog_attach_allow_foo_override", "attach prog to %s unexpectedly succeeded\n", FOO)) goto err; if (CHECK(bpf_prog_attach(drop_prog, foo, BPF_CGROUP_INET_EGRESS, 0), "prog_attach_drop_foo_none", "attach prog to %s failed, errno=%d\n", FOO, errno)) goto err; err: close(foo); close(bar); close(allow_prog); close(drop_prog); } |