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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 | // SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2022 Meta Platforms, Inc. and affiliates.*/ #define _GNU_SOURCE #include <unistd.h> #include <sys/syscall.h> #include <sys/types.h> #include <test_progs.h> #include <bpf/btf.h> #include "rcu_read_lock.skel.h" #include "cgroup_helpers.h" static unsigned long long cgroup_id; static void test_success(void) { struct rcu_read_lock *skel; int err; skel = rcu_read_lock__open(); if (!ASSERT_OK_PTR(skel, "skel_open")) return; skel->bss->target_pid = syscall(SYS_gettid); bpf_program__set_autoload(skel->progs.get_cgroup_id, true); bpf_program__set_autoload(skel->progs.task_succ, true); bpf_program__set_autoload(skel->progs.two_regions, true); bpf_program__set_autoload(skel->progs.non_sleepable_1, true); bpf_program__set_autoload(skel->progs.non_sleepable_2, true); bpf_program__set_autoload(skel->progs.task_trusted_non_rcuptr, true); bpf_program__set_autoload(skel->progs.rcu_read_lock_subprog, true); bpf_program__set_autoload(skel->progs.rcu_read_lock_global_subprog, true); bpf_program__set_autoload(skel->progs.rcu_read_lock_subprog_lock, true); bpf_program__set_autoload(skel->progs.rcu_read_lock_subprog_unlock, true); err = rcu_read_lock__load(skel); if (!ASSERT_OK(err, "skel_load")) goto out; err = rcu_read_lock__attach(skel); if (!ASSERT_OK(err, "skel_attach")) goto out; syscall(SYS_getpgid); ASSERT_EQ(skel->bss->task_storage_val, 2, "task_storage_val"); ASSERT_EQ(skel->bss->cgroup_id, cgroup_id, "cgroup_id"); out: rcu_read_lock__destroy(skel); } static void test_rcuptr_acquire(void) { struct rcu_read_lock *skel; int err; skel = rcu_read_lock__open(); if (!ASSERT_OK_PTR(skel, "skel_open")) return; skel->bss->target_pid = syscall(SYS_gettid); bpf_program__set_autoload(skel->progs.task_acquire, true); err = rcu_read_lock__load(skel); if (!ASSERT_OK(err, "skel_load")) goto out; err = rcu_read_lock__attach(skel); ASSERT_OK(err, "skel_attach"); out: rcu_read_lock__destroy(skel); } static const char * const inproper_region_tests[] = { "miss_lock", "no_lock", "miss_unlock", "non_sleepable_rcu_mismatch", "inproper_sleepable_helper", "inproper_sleepable_kfunc", "nested_rcu_region", "rcu_read_lock_global_subprog_lock", "rcu_read_lock_global_subprog_unlock", }; static void test_inproper_region(void) { struct rcu_read_lock *skel; struct bpf_program *prog; int i, err; for (i = 0; i < ARRAY_SIZE(inproper_region_tests); i++) { skel = rcu_read_lock__open(); if (!ASSERT_OK_PTR(skel, "skel_open")) return; prog = bpf_object__find_program_by_name(skel->obj, inproper_region_tests[i]); if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name")) goto out; bpf_program__set_autoload(prog, true); err = rcu_read_lock__load(skel); ASSERT_ERR(err, "skel_load"); out: rcu_read_lock__destroy(skel); } } static const char * const rcuptr_misuse_tests[] = { "task_untrusted_rcuptr", "cross_rcu_region", }; static void test_rcuptr_misuse(void) { struct rcu_read_lock *skel; struct bpf_program *prog; int i, err; for (i = 0; i < ARRAY_SIZE(rcuptr_misuse_tests); i++) { skel = rcu_read_lock__open(); if (!ASSERT_OK_PTR(skel, "skel_open")) return; prog = bpf_object__find_program_by_name(skel->obj, rcuptr_misuse_tests[i]); if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name")) goto out; bpf_program__set_autoload(prog, true); err = rcu_read_lock__load(skel); ASSERT_ERR(err, "skel_load"); out: rcu_read_lock__destroy(skel); } } void test_rcu_read_lock(void) { int cgroup_fd; cgroup_fd = test__join_cgroup("/rcu_read_lock"); if (!ASSERT_GE(cgroup_fd, 0, "join_cgroup /rcu_read_lock")) goto out; cgroup_id = get_cgroup_id("/rcu_read_lock"); if (test__start_subtest("success")) test_success(); if (test__start_subtest("rcuptr_acquire")) test_rcuptr_acquire(); if (test__start_subtest("negative_tests_inproper_region")) test_inproper_region(); if (test__start_subtest("negative_tests_rcuptr_misuse")) test_rcuptr_misuse(); close(cgroup_fd); out:; } |