diff options
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/iters.c')
-rw-r--r-- | tools/testing/selftests/bpf/prog_tests/iters.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/iters.c b/tools/testing/selftests/bpf/prog_tests/iters.c index 10804ae5ae..bf84d4a1d9 100644 --- a/tools/testing/selftests/bpf/prog_tests/iters.c +++ b/tools/testing/selftests/bpf/prog_tests/iters.c @@ -1,13 +1,25 @@ // SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */ +#include <sys/syscall.h> +#include <sys/mman.h> +#include <sys/wait.h> +#include <unistd.h> +#include <malloc.h> +#include <stdlib.h> #include <test_progs.h> +#include "cgroup_helpers.h" #include "iters.skel.h" #include "iters_state_safety.skel.h" #include "iters_looping.skel.h" #include "iters_num.skel.h" #include "iters_testmod_seq.skel.h" +#include "iters_task_vma.skel.h" +#include "iters_task.skel.h" +#include "iters_css_task.skel.h" +#include "iters_css.skel.h" +#include "iters_task_failure.skel.h" static void subtest_num_iters(void) { @@ -90,11 +102,199 @@ cleanup: iters_testmod_seq__destroy(skel); } +static void subtest_task_vma_iters(void) +{ + unsigned long start, end, bpf_iter_start, bpf_iter_end; + struct iters_task_vma *skel; + char rest_of_line[1000]; + unsigned int seen; + FILE *f = NULL; + int err; + + skel = iters_task_vma__open_and_load(); + if (!ASSERT_OK_PTR(skel, "skel_open_and_load")) + return; + + skel->bss->target_pid = getpid(); + + err = iters_task_vma__attach(skel); + if (!ASSERT_OK(err, "skel_attach")) + goto cleanup; + + getpgid(skel->bss->target_pid); + iters_task_vma__detach(skel); + + if (!ASSERT_GT(skel->bss->vmas_seen, 0, "vmas_seen_gt_zero")) + goto cleanup; + + f = fopen("/proc/self/maps", "r"); + if (!ASSERT_OK_PTR(f, "proc_maps_fopen")) + goto cleanup; + + seen = 0; + while (fscanf(f, "%lx-%lx %[^\n]\n", &start, &end, rest_of_line) == 3) { + /* [vsyscall] vma isn't _really_ part of task->mm vmas. + * /proc/PID/maps returns it when out of vmas - see get_gate_vma + * calls in fs/proc/task_mmu.c + */ + if (strstr(rest_of_line, "[vsyscall]")) + continue; + + bpf_iter_start = skel->bss->vm_ranges[seen].vm_start; + bpf_iter_end = skel->bss->vm_ranges[seen].vm_end; + + ASSERT_EQ(bpf_iter_start, start, "vma->vm_start match"); + ASSERT_EQ(bpf_iter_end, end, "vma->vm_end match"); + seen++; + } + + if (!ASSERT_EQ(skel->bss->vmas_seen, seen, "vmas_seen_eq")) + goto cleanup; + +cleanup: + if (f) + fclose(f); + iters_task_vma__destroy(skel); +} + +static pthread_mutex_t do_nothing_mutex; + +static void *do_nothing_wait(void *arg) +{ + pthread_mutex_lock(&do_nothing_mutex); + pthread_mutex_unlock(&do_nothing_mutex); + + pthread_exit(arg); +} + +#define thread_num 2 + +static void subtest_task_iters(void) +{ + struct iters_task *skel = NULL; + pthread_t thread_ids[thread_num]; + void *ret; + int err; + + skel = iters_task__open_and_load(); + if (!ASSERT_OK_PTR(skel, "open_and_load")) + goto cleanup; + skel->bss->target_pid = getpid(); + err = iters_task__attach(skel); + if (!ASSERT_OK(err, "iters_task__attach")) + goto cleanup; + pthread_mutex_lock(&do_nothing_mutex); + for (int i = 0; i < thread_num; i++) + ASSERT_OK(pthread_create(&thread_ids[i], NULL, &do_nothing_wait, NULL), + "pthread_create"); + + syscall(SYS_getpgid); + iters_task__detach(skel); + ASSERT_EQ(skel->bss->procs_cnt, 1, "procs_cnt"); + ASSERT_EQ(skel->bss->threads_cnt, thread_num + 1, "threads_cnt"); + ASSERT_EQ(skel->bss->proc_threads_cnt, thread_num + 1, "proc_threads_cnt"); + pthread_mutex_unlock(&do_nothing_mutex); + for (int i = 0; i < thread_num; i++) + ASSERT_OK(pthread_join(thread_ids[i], &ret), "pthread_join"); +cleanup: + iters_task__destroy(skel); +} + +extern int stack_mprotect(void); + +static void subtest_css_task_iters(void) +{ + struct iters_css_task *skel = NULL; + int err, cg_fd, cg_id; + const char *cgrp_path = "/cg1"; + + err = setup_cgroup_environment(); + if (!ASSERT_OK(err, "setup_cgroup_environment")) + goto cleanup; + cg_fd = create_and_get_cgroup(cgrp_path); + if (!ASSERT_GE(cg_fd, 0, "create_and_get_cgroup")) + goto cleanup; + cg_id = get_cgroup_id(cgrp_path); + err = join_cgroup(cgrp_path); + if (!ASSERT_OK(err, "join_cgroup")) + goto cleanup; + + skel = iters_css_task__open_and_load(); + if (!ASSERT_OK_PTR(skel, "open_and_load")) + goto cleanup; + + skel->bss->target_pid = getpid(); + skel->bss->cg_id = cg_id; + err = iters_css_task__attach(skel); + if (!ASSERT_OK(err, "iters_task__attach")) + goto cleanup; + err = stack_mprotect(); + if (!ASSERT_EQ(err, -1, "stack_mprotect") || + !ASSERT_EQ(errno, EPERM, "stack_mprotect")) + goto cleanup; + iters_css_task__detach(skel); + ASSERT_EQ(skel->bss->css_task_cnt, 1, "css_task_cnt"); + +cleanup: + cleanup_cgroup_environment(); + iters_css_task__destroy(skel); +} + +static void subtest_css_iters(void) +{ + struct iters_css *skel = NULL; + struct { + const char *path; + int fd; + } cgs[] = { + { "/cg1" }, + { "/cg1/cg2" }, + { "/cg1/cg2/cg3" }, + { "/cg1/cg2/cg3/cg4" }, + }; + int err, cg_nr = ARRAY_SIZE(cgs); + int i; + + err = setup_cgroup_environment(); + if (!ASSERT_OK(err, "setup_cgroup_environment")) + goto cleanup; + for (i = 0; i < cg_nr; i++) { + cgs[i].fd = create_and_get_cgroup(cgs[i].path); + if (!ASSERT_GE(cgs[i].fd, 0, "create_and_get_cgroup")) + goto cleanup; + } + + skel = iters_css__open_and_load(); + if (!ASSERT_OK_PTR(skel, "open_and_load")) + goto cleanup; + + skel->bss->target_pid = getpid(); + skel->bss->root_cg_id = get_cgroup_id(cgs[0].path); + skel->bss->leaf_cg_id = get_cgroup_id(cgs[cg_nr - 1].path); + err = iters_css__attach(skel); + + if (!ASSERT_OK(err, "iters_task__attach")) + goto cleanup; + + syscall(SYS_getpgid); + ASSERT_EQ(skel->bss->pre_order_cnt, cg_nr, "pre_order_cnt"); + ASSERT_EQ(skel->bss->first_cg_id, get_cgroup_id(cgs[0].path), "first_cg_id"); + + ASSERT_EQ(skel->bss->post_order_cnt, cg_nr, "post_order_cnt"); + ASSERT_EQ(skel->bss->last_cg_id, get_cgroup_id(cgs[0].path), "last_cg_id"); + ASSERT_EQ(skel->bss->tree_high, cg_nr - 1, "tree_high"); + iters_css__detach(skel); +cleanup: + cleanup_cgroup_environment(); + iters_css__destroy(skel); +} + void test_iters(void) { RUN_TESTS(iters_state_safety); RUN_TESTS(iters_looping); RUN_TESTS(iters); + RUN_TESTS(iters_css_task); if (env.has_testmod) RUN_TESTS(iters_testmod_seq); @@ -103,4 +303,13 @@ void test_iters(void) subtest_num_iters(); if (test__start_subtest("testmod_seq")) subtest_testmod_seq_iters(); + if (test__start_subtest("task_vma")) + subtest_task_vma_iters(); + if (test__start_subtest("task")) + subtest_task_iters(); + if (test__start_subtest("css_task")) + subtest_css_task_iters(); + if (test__start_subtest("css")) + subtest_css_iters(); + RUN_TESTS(iters_task_failure); } |