588 lines
12 KiB
C
588 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright (c) 2017 Facebook
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*/
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#include "test_progs.h"
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#include "cgroup_helpers.h"
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#include "bpf_rlimit.h"
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#include <argp.h>
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#include <string.h>
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/* defined in test_progs.h */
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struct test_env env;
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struct prog_test_def {
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const char *test_name;
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int test_num;
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void (*run_test)(void);
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bool force_log;
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int error_cnt;
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int skip_cnt;
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bool tested;
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bool need_cgroup_cleanup;
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char *subtest_name;
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int subtest_num;
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/* store counts before subtest started */
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int old_error_cnt;
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};
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static bool should_run(struct test_selector *sel, int num, const char *name)
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{
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if (sel->name && sel->name[0] && !strstr(name, sel->name))
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return false;
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if (!sel->num_set)
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return true;
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return num < sel->num_set_len && sel->num_set[num];
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}
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static void dump_test_log(const struct prog_test_def *test, bool failed)
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{
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if (stdout == env.stdout)
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return;
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fflush(stdout); /* exports env.log_buf & env.log_cnt */
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if (env.verbose || test->force_log || failed) {
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if (env.log_cnt) {
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env.log_buf[env.log_cnt] = '\0';
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fprintf(env.stdout, "%s", env.log_buf);
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if (env.log_buf[env.log_cnt - 1] != '\n')
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fprintf(env.stdout, "\n");
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}
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}
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fseeko(stdout, 0, SEEK_SET); /* rewind */
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}
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static void skip_account(void)
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{
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if (env.test->skip_cnt) {
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env.skip_cnt++;
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env.test->skip_cnt = 0;
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}
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}
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void test__end_subtest()
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{
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struct prog_test_def *test = env.test;
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int sub_error_cnt = test->error_cnt - test->old_error_cnt;
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if (sub_error_cnt)
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env.fail_cnt++;
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else
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env.sub_succ_cnt++;
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skip_account();
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dump_test_log(test, sub_error_cnt);
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fprintf(env.stdout, "#%d/%d %s:%s\n",
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test->test_num, test->subtest_num,
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test->subtest_name, sub_error_cnt ? "FAIL" : "OK");
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free(test->subtest_name);
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test->subtest_name = NULL;
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}
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bool test__start_subtest(const char *name)
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{
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struct prog_test_def *test = env.test;
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if (test->subtest_name)
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test__end_subtest();
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test->subtest_num++;
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if (!name || !name[0]) {
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fprintf(env.stderr,
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"Subtest #%d didn't provide sub-test name!\n",
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test->subtest_num);
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return false;
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}
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if (!should_run(&env.subtest_selector, test->subtest_num, name))
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return false;
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test->subtest_name = strdup(name);
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if (!test->subtest_name) {
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fprintf(env.stderr,
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"Subtest #%d: failed to copy subtest name!\n",
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test->subtest_num);
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return false;
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}
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env.test->old_error_cnt = env.test->error_cnt;
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return true;
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}
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void test__force_log() {
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env.test->force_log = true;
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}
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void test__skip(void)
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{
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env.test->skip_cnt++;
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}
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void test__fail(void)
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{
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env.test->error_cnt++;
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}
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int test__join_cgroup(const char *path)
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{
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int fd;
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if (!env.test->need_cgroup_cleanup) {
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if (setup_cgroup_environment()) {
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fprintf(stderr,
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"#%d %s: Failed to setup cgroup environment\n",
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env.test->test_num, env.test->test_name);
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return -1;
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}
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env.test->need_cgroup_cleanup = true;
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}
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fd = create_and_get_cgroup(path);
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if (fd < 0) {
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fprintf(stderr,
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"#%d %s: Failed to create cgroup '%s' (errno=%d)\n",
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env.test->test_num, env.test->test_name, path, errno);
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return fd;
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}
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if (join_cgroup(path)) {
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fprintf(stderr,
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"#%d %s: Failed to join cgroup '%s' (errno=%d)\n",
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env.test->test_num, env.test->test_name, path, errno);
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return -1;
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}
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return fd;
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}
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struct ipv4_packet pkt_v4 = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_IP),
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.iph.ihl = 5,
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.iph.protocol = IPPROTO_TCP,
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.iph.tot_len = __bpf_constant_htons(MAGIC_BYTES),
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.tcp.urg_ptr = 123,
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.tcp.doff = 5,
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};
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struct ipv6_packet pkt_v6 = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_IPV6),
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.iph.nexthdr = IPPROTO_TCP,
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.iph.payload_len = __bpf_constant_htons(MAGIC_BYTES),
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.tcp.urg_ptr = 123,
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.tcp.doff = 5,
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};
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int bpf_find_map(const char *test, struct bpf_object *obj, const char *name)
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{
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struct bpf_map *map;
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map = bpf_object__find_map_by_name(obj, name);
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if (!map) {
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printf("%s:FAIL:map '%s' not found\n", test, name);
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test__fail();
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return -1;
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}
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return bpf_map__fd(map);
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}
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static bool is_jit_enabled(void)
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{
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const char *jit_sysctl = "/proc/sys/net/core/bpf_jit_enable";
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bool enabled = false;
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int sysctl_fd;
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sysctl_fd = open(jit_sysctl, 0, O_RDONLY);
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if (sysctl_fd != -1) {
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char tmpc;
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if (read(sysctl_fd, &tmpc, sizeof(tmpc)) == 1)
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enabled = (tmpc != '0');
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close(sysctl_fd);
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}
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return enabled;
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}
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int compare_map_keys(int map1_fd, int map2_fd)
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{
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__u32 key, next_key;
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char val_buf[PERF_MAX_STACK_DEPTH *
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sizeof(struct bpf_stack_build_id)];
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int err;
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err = bpf_map_get_next_key(map1_fd, NULL, &key);
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if (err)
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return err;
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err = bpf_map_lookup_elem(map2_fd, &key, val_buf);
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if (err)
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return err;
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while (bpf_map_get_next_key(map1_fd, &key, &next_key) == 0) {
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err = bpf_map_lookup_elem(map2_fd, &next_key, val_buf);
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if (err)
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return err;
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key = next_key;
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}
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if (errno != ENOENT)
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return -1;
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return 0;
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}
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int compare_stack_ips(int smap_fd, int amap_fd, int stack_trace_len)
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{
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__u32 key, next_key, *cur_key_p, *next_key_p;
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char *val_buf1, *val_buf2;
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int i, err = 0;
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val_buf1 = malloc(stack_trace_len);
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val_buf2 = malloc(stack_trace_len);
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cur_key_p = NULL;
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next_key_p = &key;
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while (bpf_map_get_next_key(smap_fd, cur_key_p, next_key_p) == 0) {
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err = bpf_map_lookup_elem(smap_fd, next_key_p, val_buf1);
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if (err)
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goto out;
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err = bpf_map_lookup_elem(amap_fd, next_key_p, val_buf2);
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if (err)
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goto out;
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for (i = 0; i < stack_trace_len; i++) {
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if (val_buf1[i] != val_buf2[i]) {
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err = -1;
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goto out;
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}
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}
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key = *next_key_p;
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cur_key_p = &key;
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next_key_p = &next_key;
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}
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if (errno != ENOENT)
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err = -1;
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out:
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free(val_buf1);
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free(val_buf2);
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return err;
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}
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int extract_build_id(char *build_id, size_t size)
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{
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FILE *fp;
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char *line = NULL;
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size_t len = 0;
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fp = popen("readelf -n ./urandom_read | grep 'Build ID'", "r");
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if (fp == NULL)
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return -1;
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if (getline(&line, &len, fp) == -1)
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goto err;
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fclose(fp);
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if (len > size)
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len = size;
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memcpy(build_id, line, len);
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build_id[len] = '\0';
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return 0;
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err:
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fclose(fp);
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return -1;
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}
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void *spin_lock_thread(void *arg)
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{
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__u32 duration, retval;
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int err, prog_fd = *(u32 *) arg;
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err = bpf_prog_test_run(prog_fd, 10000, &pkt_v4, sizeof(pkt_v4),
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NULL, NULL, &retval, &duration);
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CHECK(err || retval, "",
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"err %d errno %d retval %d duration %d\n",
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err, errno, retval, duration);
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pthread_exit(arg);
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}
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/* extern declarations for test funcs */
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#define DEFINE_TEST(name) extern void test_##name();
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#include <prog_tests/tests.h>
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#undef DEFINE_TEST
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static struct prog_test_def prog_test_defs[] = {
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#define DEFINE_TEST(name) { \
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.test_name = #name, \
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.run_test = &test_##name, \
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},
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#include <prog_tests/tests.h>
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#undef DEFINE_TEST
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};
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const int prog_test_cnt = ARRAY_SIZE(prog_test_defs);
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const char *argp_program_version = "test_progs 0.1";
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const char *argp_program_bug_address = "<bpf@vger.kernel.org>";
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const char argp_program_doc[] = "BPF selftests test runner";
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enum ARG_KEYS {
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ARG_TEST_NUM = 'n',
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ARG_TEST_NAME = 't',
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ARG_VERIFIER_STATS = 's',
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ARG_VERBOSE = 'v',
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};
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static const struct argp_option opts[] = {
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{ "num", ARG_TEST_NUM, "NUM", 0,
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"Run test number NUM only " },
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{ "name", ARG_TEST_NAME, "NAME", 0,
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"Run tests with names containing NAME" },
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{ "verifier-stats", ARG_VERIFIER_STATS, NULL, 0,
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"Output verifier statistics", },
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{ "verbose", ARG_VERBOSE, "LEVEL", OPTION_ARG_OPTIONAL,
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"Verbose output (use -vv for extra verbose output)" },
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{},
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};
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static int libbpf_print_fn(enum libbpf_print_level level,
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const char *format, va_list args)
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{
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if (!env.very_verbose && level == LIBBPF_DEBUG)
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return 0;
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vprintf(format, args);
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return 0;
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}
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int parse_num_list(const char *s, struct test_selector *sel)
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{
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int i, set_len = 0, num, start = 0, end = -1;
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bool *set = NULL, *tmp, parsing_end = false;
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char *next;
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while (s[0]) {
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errno = 0;
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num = strtol(s, &next, 10);
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if (errno)
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return -errno;
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if (parsing_end)
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end = num;
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else
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start = num;
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if (!parsing_end && *next == '-') {
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s = next + 1;
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parsing_end = true;
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continue;
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} else if (*next == ',') {
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parsing_end = false;
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s = next + 1;
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end = num;
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} else if (*next == '\0') {
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parsing_end = false;
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s = next;
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end = num;
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} else {
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return -EINVAL;
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}
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if (start > end)
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return -EINVAL;
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if (end + 1 > set_len) {
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set_len = end + 1;
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tmp = realloc(set, set_len);
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if (!tmp) {
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free(set);
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return -ENOMEM;
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}
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set = tmp;
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}
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for (i = start; i <= end; i++) {
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set[i] = true;
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}
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}
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if (!set)
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return -EINVAL;
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sel->num_set = set;
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sel->num_set_len = set_len;
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return 0;
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}
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static error_t parse_arg(int key, char *arg, struct argp_state *state)
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{
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struct test_env *env = state->input;
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switch (key) {
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case ARG_TEST_NUM: {
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char *subtest_str = strchr(arg, '/');
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if (subtest_str) {
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*subtest_str = '\0';
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if (parse_num_list(subtest_str + 1,
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&env->subtest_selector)) {
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fprintf(stderr,
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"Failed to parse subtest numbers.\n");
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return -EINVAL;
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}
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}
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if (parse_num_list(arg, &env->test_selector)) {
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fprintf(stderr, "Failed to parse test numbers.\n");
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return -EINVAL;
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}
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break;
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}
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case ARG_TEST_NAME: {
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char *subtest_str = strchr(arg, '/');
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if (subtest_str) {
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*subtest_str = '\0';
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env->subtest_selector.name = strdup(subtest_str + 1);
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if (!env->subtest_selector.name)
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return -ENOMEM;
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}
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env->test_selector.name = strdup(arg);
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if (!env->test_selector.name)
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return -ENOMEM;
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break;
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}
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case ARG_VERIFIER_STATS:
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env->verifier_stats = true;
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break;
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case ARG_VERBOSE:
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if (arg) {
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if (strcmp(arg, "v") == 0) {
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env->very_verbose = true;
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} else {
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fprintf(stderr,
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"Unrecognized verbosity setting ('%s'), only -v and -vv are supported\n",
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arg);
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return -EINVAL;
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}
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}
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env->verbose = true;
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break;
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case ARGP_KEY_ARG:
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argp_usage(state);
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break;
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case ARGP_KEY_END:
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break;
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default:
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return ARGP_ERR_UNKNOWN;
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}
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return 0;
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}
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static void stdio_hijack(void)
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{
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#ifdef __GLIBC__
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env.stdout = stdout;
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env.stderr = stderr;
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if (env.verbose) {
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/* nothing to do, output to stdout by default */
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return;
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}
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/* stdout and stderr -> buffer */
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fflush(stdout);
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stdout = open_memstream(&env.log_buf, &env.log_cnt);
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if (!stdout) {
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stdout = env.stdout;
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perror("open_memstream");
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return;
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}
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stderr = stdout;
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#endif
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}
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static void stdio_restore(void)
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{
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#ifdef __GLIBC__
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if (stdout == env.stdout)
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return;
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fclose(stdout);
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free(env.log_buf);
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env.log_buf = NULL;
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env.log_cnt = 0;
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stdout = env.stdout;
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stderr = env.stderr;
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#endif
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}
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int main(int argc, char **argv)
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{
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static const struct argp argp = {
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.options = opts,
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.parser = parse_arg,
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.doc = argp_program_doc,
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};
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int err, i;
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err = argp_parse(&argp, argc, argv, 0, NULL, &env);
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if (err)
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return err;
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libbpf_set_print(libbpf_print_fn);
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srand(time(NULL));
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env.jit_enabled = is_jit_enabled();
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stdio_hijack();
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for (i = 0; i < prog_test_cnt; i++) {
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struct prog_test_def *test = &prog_test_defs[i];
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env.test = test;
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test->test_num = i + 1;
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if (!should_run(&env.test_selector,
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test->test_num, test->test_name))
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continue;
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test->run_test();
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/* ensure last sub-test is finalized properly */
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if (test->subtest_name)
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test__end_subtest();
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test->tested = true;
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if (test->error_cnt)
|
|
env.fail_cnt++;
|
|
else
|
|
env.succ_cnt++;
|
|
skip_account();
|
|
|
|
dump_test_log(test, test->error_cnt);
|
|
|
|
fprintf(env.stdout, "#%d %s:%s\n",
|
|
test->test_num, test->test_name,
|
|
test->error_cnt ? "FAIL" : "OK");
|
|
|
|
if (test->need_cgroup_cleanup)
|
|
cleanup_cgroup_environment();
|
|
}
|
|
stdio_restore();
|
|
printf("Summary: %d/%d PASSED, %d SKIPPED, %d FAILED\n",
|
|
env.succ_cnt, env.sub_succ_cnt, env.skip_cnt, env.fail_cnt);
|
|
|
|
free(env.test_selector.num_set);
|
|
free(env.subtest_selector.num_set);
|
|
|
|
return env.fail_cnt ? EXIT_FAILURE : EXIT_SUCCESS;
|
|
}
|