linux-stable/tools/testing/selftests/bpf/test_progs.c
Andrii Nakryiko c164b8b404 selftests/bpf: Remove explicit setrlimit(RLIMIT_MEMLOCK) in main selftests
As libbpf now is able to automatically take care of RLIMIT_MEMLOCK
increase (or skip it altogether on recent enough kernels), remove
explicit setrlimit() invocations in bench, test_maps, test_verifier, and
test_progs.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20211214195904.1785155-3-andrii@kernel.org
2021-12-14 22:16:54 +01:00

1505 lines
33 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2017 Facebook
*/
#define _GNU_SOURCE
#include "test_progs.h"
#include "cgroup_helpers.h"
#include <argp.h>
#include <pthread.h>
#include <sched.h>
#include <signal.h>
#include <string.h>
#include <execinfo.h> /* backtrace */
#include <linux/membarrier.h>
#include <sys/sysinfo.h> /* get_nprocs */
#include <netinet/in.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <sys/un.h>
/* Adapted from perf/util/string.c */
static bool glob_match(const char *str, const char *pat)
{
while (*str && *pat && *pat != '*') {
if (*str != *pat)
return false;
str++;
pat++;
}
/* Check wild card */
if (*pat == '*') {
while (*pat == '*')
pat++;
if (!*pat) /* Tail wild card matches all */
return true;
while (*str)
if (glob_match(str++, pat))
return true;
}
return !*str && !*pat;
}
#define EXIT_NO_TEST 2
#define EXIT_ERR_SETUP_INFRA 3
/* defined in test_progs.h */
struct test_env env = {};
struct prog_test_def {
const char *test_name;
int test_num;
void (*run_test)(void);
void (*run_serial_test)(void);
bool force_log;
int error_cnt;
int skip_cnt;
int sub_succ_cnt;
bool should_run;
bool tested;
bool need_cgroup_cleanup;
char *subtest_name;
int subtest_num;
/* store counts before subtest started */
int old_error_cnt;
};
/* Override C runtime library's usleep() implementation to ensure nanosleep()
* is always called. Usleep is frequently used in selftests as a way to
* trigger kprobe and tracepoints.
*/
int usleep(useconds_t usec)
{
struct timespec ts = {
.tv_sec = usec / 1000000,
.tv_nsec = (usec % 1000000) * 1000,
};
return syscall(__NR_nanosleep, &ts, NULL);
}
static bool should_run(struct test_selector *sel, int num, const char *name)
{
int i;
for (i = 0; i < sel->blacklist.cnt; i++) {
if (glob_match(name, sel->blacklist.strs[i]))
return false;
}
for (i = 0; i < sel->whitelist.cnt; i++) {
if (glob_match(name, sel->whitelist.strs[i]))
return true;
}
if (!sel->whitelist.cnt && !sel->num_set)
return true;
return num < sel->num_set_len && sel->num_set[num];
}
static void dump_test_log(const struct prog_test_def *test, bool failed)
{
if (stdout == env.stdout)
return;
/* worker always holds log */
if (env.worker_id != -1)
return;
fflush(stdout); /* exports env.log_buf & env.log_cnt */
if (env.verbosity > VERBOSE_NONE || test->force_log || failed) {
if (env.log_cnt) {
env.log_buf[env.log_cnt] = '\0';
fprintf(env.stdout, "%s", env.log_buf);
if (env.log_buf[env.log_cnt - 1] != '\n')
fprintf(env.stdout, "\n");
}
}
}
static void skip_account(void)
{
if (env.test->skip_cnt) {
env.skip_cnt++;
env.test->skip_cnt = 0;
}
}
static void stdio_restore(void);
/* A bunch of tests set custom affinity per-thread and/or per-process. Reset
* it after each test/sub-test.
*/
static void reset_affinity(void)
{
cpu_set_t cpuset;
int i, err;
CPU_ZERO(&cpuset);
for (i = 0; i < env.nr_cpus; i++)
CPU_SET(i, &cpuset);
err = sched_setaffinity(0, sizeof(cpuset), &cpuset);
if (err < 0) {
stdio_restore();
fprintf(stderr, "Failed to reset process affinity: %d!\n", err);
exit(EXIT_ERR_SETUP_INFRA);
}
err = pthread_setaffinity_np(pthread_self(), sizeof(cpuset), &cpuset);
if (err < 0) {
stdio_restore();
fprintf(stderr, "Failed to reset thread affinity: %d!\n", err);
exit(EXIT_ERR_SETUP_INFRA);
}
}
static void save_netns(void)
{
env.saved_netns_fd = open("/proc/self/ns/net", O_RDONLY);
if (env.saved_netns_fd == -1) {
perror("open(/proc/self/ns/net)");
exit(EXIT_ERR_SETUP_INFRA);
}
}
static void restore_netns(void)
{
if (setns(env.saved_netns_fd, CLONE_NEWNET) == -1) {
stdio_restore();
perror("setns(CLONE_NEWNS)");
exit(EXIT_ERR_SETUP_INFRA);
}
}
void test__end_subtest(void)
{
struct prog_test_def *test = env.test;
int sub_error_cnt = test->error_cnt - test->old_error_cnt;
dump_test_log(test, sub_error_cnt);
fprintf(stdout, "#%d/%d %s/%s:%s\n",
test->test_num, test->subtest_num, test->test_name, test->subtest_name,
sub_error_cnt ? "FAIL" : (test->skip_cnt ? "SKIP" : "OK"));
if (sub_error_cnt)
test->error_cnt++;
else if (test->skip_cnt == 0)
test->sub_succ_cnt++;
skip_account();
free(test->subtest_name);
test->subtest_name = NULL;
}
bool test__start_subtest(const char *name)
{
struct prog_test_def *test = env.test;
if (test->subtest_name)
test__end_subtest();
test->subtest_num++;
if (!name || !name[0]) {
fprintf(env.stderr,
"Subtest #%d didn't provide sub-test name!\n",
test->subtest_num);
return false;
}
if (!should_run(&env.subtest_selector, test->subtest_num, name))
return false;
test->subtest_name = strdup(name);
if (!test->subtest_name) {
fprintf(env.stderr,
"Subtest #%d: failed to copy subtest name!\n",
test->subtest_num);
return false;
}
env.test->old_error_cnt = env.test->error_cnt;
return true;
}
void test__force_log(void)
{
env.test->force_log = true;
}
void test__skip(void)
{
env.test->skip_cnt++;
}
void test__fail(void)
{
env.test->error_cnt++;
}
int test__join_cgroup(const char *path)
{
int fd;
if (!env.test->need_cgroup_cleanup) {
if (setup_cgroup_environment()) {
fprintf(stderr,
"#%d %s: Failed to setup cgroup environment\n",
env.test->test_num, env.test->test_name);
return -1;
}
env.test->need_cgroup_cleanup = true;
}
fd = create_and_get_cgroup(path);
if (fd < 0) {
fprintf(stderr,
"#%d %s: Failed to create cgroup '%s' (errno=%d)\n",
env.test->test_num, env.test->test_name, path, errno);
return fd;
}
if (join_cgroup(path)) {
fprintf(stderr,
"#%d %s: Failed to join cgroup '%s' (errno=%d)\n",
env.test->test_num, env.test->test_name, path, errno);
return -1;
}
return fd;
}
int bpf_find_map(const char *test, struct bpf_object *obj, const char *name)
{
struct bpf_map *map;
map = bpf_object__find_map_by_name(obj, name);
if (!map) {
fprintf(stdout, "%s:FAIL:map '%s' not found\n", test, name);
test__fail();
return -1;
}
return bpf_map__fd(map);
}
static bool is_jit_enabled(void)
{
const char *jit_sysctl = "/proc/sys/net/core/bpf_jit_enable";
bool enabled = false;
int sysctl_fd;
sysctl_fd = open(jit_sysctl, 0, O_RDONLY);
if (sysctl_fd != -1) {
char tmpc;
if (read(sysctl_fd, &tmpc, sizeof(tmpc)) == 1)
enabled = (tmpc != '0');
close(sysctl_fd);
}
return enabled;
}
int compare_map_keys(int map1_fd, int map2_fd)
{
__u32 key, next_key;
char val_buf[PERF_MAX_STACK_DEPTH *
sizeof(struct bpf_stack_build_id)];
int err;
err = bpf_map_get_next_key(map1_fd, NULL, &key);
if (err)
return err;
err = bpf_map_lookup_elem(map2_fd, &key, val_buf);
if (err)
return err;
while (bpf_map_get_next_key(map1_fd, &key, &next_key) == 0) {
err = bpf_map_lookup_elem(map2_fd, &next_key, val_buf);
if (err)
return err;
key = next_key;
}
if (errno != ENOENT)
return -1;
return 0;
}
int compare_stack_ips(int smap_fd, int amap_fd, int stack_trace_len)
{
__u32 key, next_key, *cur_key_p, *next_key_p;
char *val_buf1, *val_buf2;
int i, err = 0;
val_buf1 = malloc(stack_trace_len);
val_buf2 = malloc(stack_trace_len);
cur_key_p = NULL;
next_key_p = &key;
while (bpf_map_get_next_key(smap_fd, cur_key_p, next_key_p) == 0) {
err = bpf_map_lookup_elem(smap_fd, next_key_p, val_buf1);
if (err)
goto out;
err = bpf_map_lookup_elem(amap_fd, next_key_p, val_buf2);
if (err)
goto out;
for (i = 0; i < stack_trace_len; i++) {
if (val_buf1[i] != val_buf2[i]) {
err = -1;
goto out;
}
}
key = *next_key_p;
cur_key_p = &key;
next_key_p = &next_key;
}
if (errno != ENOENT)
err = -1;
out:
free(val_buf1);
free(val_buf2);
return err;
}
int extract_build_id(char *build_id, size_t size)
{
FILE *fp;
char *line = NULL;
size_t len = 0;
fp = popen("readelf -n ./urandom_read | grep 'Build ID'", "r");
if (fp == NULL)
return -1;
if (getline(&line, &len, fp) == -1)
goto err;
pclose(fp);
if (len > size)
len = size;
memcpy(build_id, line, len);
build_id[len] = '\0';
free(line);
return 0;
err:
pclose(fp);
return -1;
}
static int finit_module(int fd, const char *param_values, int flags)
{
return syscall(__NR_finit_module, fd, param_values, flags);
}
static int delete_module(const char *name, int flags)
{
return syscall(__NR_delete_module, name, flags);
}
/*
* Trigger synchronize_rcu() in kernel.
*/
int kern_sync_rcu(void)
{
return syscall(__NR_membarrier, MEMBARRIER_CMD_SHARED, 0, 0);
}
static void unload_bpf_testmod(void)
{
if (kern_sync_rcu())
fprintf(env.stderr, "Failed to trigger kernel-side RCU sync!\n");
if (delete_module("bpf_testmod", 0)) {
if (errno == ENOENT) {
if (env.verbosity > VERBOSE_NONE)
fprintf(stdout, "bpf_testmod.ko is already unloaded.\n");
return;
}
fprintf(env.stderr, "Failed to unload bpf_testmod.ko from kernel: %d\n", -errno);
return;
}
if (env.verbosity > VERBOSE_NONE)
fprintf(stdout, "Successfully unloaded bpf_testmod.ko.\n");
}
static int load_bpf_testmod(void)
{
int fd;
/* ensure previous instance of the module is unloaded */
unload_bpf_testmod();
if (env.verbosity > VERBOSE_NONE)
fprintf(stdout, "Loading bpf_testmod.ko...\n");
fd = open("bpf_testmod.ko", O_RDONLY);
if (fd < 0) {
fprintf(env.stderr, "Can't find bpf_testmod.ko kernel module: %d\n", -errno);
return -ENOENT;
}
if (finit_module(fd, "", 0)) {
fprintf(env.stderr, "Failed to load bpf_testmod.ko into the kernel: %d\n", -errno);
close(fd);
return -EINVAL;
}
close(fd);
if (env.verbosity > VERBOSE_NONE)
fprintf(stdout, "Successfully loaded bpf_testmod.ko.\n");
return 0;
}
/* extern declarations for test funcs */
#define DEFINE_TEST(name) \
extern void test_##name(void) __weak; \
extern void serial_test_##name(void) __weak;
#include <prog_tests/tests.h>
#undef DEFINE_TEST
static struct prog_test_def prog_test_defs[] = {
#define DEFINE_TEST(name) { \
.test_name = #name, \
.run_test = &test_##name, \
.run_serial_test = &serial_test_##name, \
},
#include <prog_tests/tests.h>
#undef DEFINE_TEST
};
static const int prog_test_cnt = ARRAY_SIZE(prog_test_defs);
const char *argp_program_version = "test_progs 0.1";
const char *argp_program_bug_address = "<bpf@vger.kernel.org>";
static const char argp_program_doc[] = "BPF selftests test runner";
enum ARG_KEYS {
ARG_TEST_NUM = 'n',
ARG_TEST_NAME = 't',
ARG_TEST_NAME_BLACKLIST = 'b',
ARG_VERIFIER_STATS = 's',
ARG_VERBOSE = 'v',
ARG_GET_TEST_CNT = 'c',
ARG_LIST_TEST_NAMES = 'l',
ARG_TEST_NAME_GLOB_ALLOWLIST = 'a',
ARG_TEST_NAME_GLOB_DENYLIST = 'd',
ARG_NUM_WORKERS = 'j',
ARG_DEBUG = -1,
};
static const struct argp_option opts[] = {
{ "num", ARG_TEST_NUM, "NUM", 0,
"Run test number NUM only " },
{ "name", ARG_TEST_NAME, "NAMES", 0,
"Run tests with names containing any string from NAMES list" },
{ "name-blacklist", ARG_TEST_NAME_BLACKLIST, "NAMES", 0,
"Don't run tests with names containing any string from NAMES list" },
{ "verifier-stats", ARG_VERIFIER_STATS, NULL, 0,
"Output verifier statistics", },
{ "verbose", ARG_VERBOSE, "LEVEL", OPTION_ARG_OPTIONAL,
"Verbose output (use -vv or -vvv for progressively verbose output)" },
{ "count", ARG_GET_TEST_CNT, NULL, 0,
"Get number of selected top-level tests " },
{ "list", ARG_LIST_TEST_NAMES, NULL, 0,
"List test names that would run (without running them) " },
{ "allow", ARG_TEST_NAME_GLOB_ALLOWLIST, "NAMES", 0,
"Run tests with name matching the pattern (supports '*' wildcard)." },
{ "deny", ARG_TEST_NAME_GLOB_DENYLIST, "NAMES", 0,
"Don't run tests with name matching the pattern (supports '*' wildcard)." },
{ "workers", ARG_NUM_WORKERS, "WORKERS", OPTION_ARG_OPTIONAL,
"Number of workers to run in parallel, default to number of cpus." },
{ "debug", ARG_DEBUG, NULL, 0,
"print extra debug information for test_progs." },
{},
};
static int libbpf_print_fn(enum libbpf_print_level level,
const char *format, va_list args)
{
if (env.verbosity < VERBOSE_VERY && level == LIBBPF_DEBUG)
return 0;
vfprintf(stdout, format, args);
return 0;
}
static void free_str_set(const struct str_set *set)
{
int i;
if (!set)
return;
for (i = 0; i < set->cnt; i++)
free((void *)set->strs[i]);
free(set->strs);
}
static int parse_str_list(const char *s, struct str_set *set, bool is_glob_pattern)
{
char *input, *state = NULL, *next, **tmp, **strs = NULL;
int i, cnt = 0;
input = strdup(s);
if (!input)
return -ENOMEM;
while ((next = strtok_r(state ? NULL : input, ",", &state))) {
tmp = realloc(strs, sizeof(*strs) * (cnt + 1));
if (!tmp)
goto err;
strs = tmp;
if (is_glob_pattern) {
strs[cnt] = strdup(next);
if (!strs[cnt])
goto err;
} else {
strs[cnt] = malloc(strlen(next) + 2 + 1);
if (!strs[cnt])
goto err;
sprintf(strs[cnt], "*%s*", next);
}
cnt++;
}
tmp = realloc(set->strs, sizeof(*strs) * (cnt + set->cnt));
if (!tmp)
goto err;
memcpy(tmp + set->cnt, strs, sizeof(*strs) * cnt);
set->strs = (const char **)tmp;
set->cnt += cnt;
free(input);
free(strs);
return 0;
err:
for (i = 0; i < cnt; i++)
free(strs[i]);
free(strs);
free(input);
return -ENOMEM;
}
extern int extra_prog_load_log_flags;
static error_t parse_arg(int key, char *arg, struct argp_state *state)
{
struct test_env *env = state->input;
switch (key) {
case ARG_TEST_NUM: {
char *subtest_str = strchr(arg, '/');
if (subtest_str) {
*subtest_str = '\0';
if (parse_num_list(subtest_str + 1,
&env->subtest_selector.num_set,
&env->subtest_selector.num_set_len)) {
fprintf(stderr,
"Failed to parse subtest numbers.\n");
return -EINVAL;
}
}
if (parse_num_list(arg, &env->test_selector.num_set,
&env->test_selector.num_set_len)) {
fprintf(stderr, "Failed to parse test numbers.\n");
return -EINVAL;
}
break;
}
case ARG_TEST_NAME_GLOB_ALLOWLIST:
case ARG_TEST_NAME: {
char *subtest_str = strchr(arg, '/');
if (subtest_str) {
*subtest_str = '\0';
if (parse_str_list(subtest_str + 1,
&env->subtest_selector.whitelist,
key == ARG_TEST_NAME_GLOB_ALLOWLIST))
return -ENOMEM;
}
if (parse_str_list(arg, &env->test_selector.whitelist,
key == ARG_TEST_NAME_GLOB_ALLOWLIST))
return -ENOMEM;
break;
}
case ARG_TEST_NAME_GLOB_DENYLIST:
case ARG_TEST_NAME_BLACKLIST: {
char *subtest_str = strchr(arg, '/');
if (subtest_str) {
*subtest_str = '\0';
if (parse_str_list(subtest_str + 1,
&env->subtest_selector.blacklist,
key == ARG_TEST_NAME_GLOB_DENYLIST))
return -ENOMEM;
}
if (parse_str_list(arg, &env->test_selector.blacklist,
key == ARG_TEST_NAME_GLOB_DENYLIST))
return -ENOMEM;
break;
}
case ARG_VERIFIER_STATS:
env->verifier_stats = true;
break;
case ARG_VERBOSE:
env->verbosity = VERBOSE_NORMAL;
if (arg) {
if (strcmp(arg, "v") == 0) {
env->verbosity = VERBOSE_VERY;
extra_prog_load_log_flags = 1;
} else if (strcmp(arg, "vv") == 0) {
env->verbosity = VERBOSE_SUPER;
extra_prog_load_log_flags = 2;
} else {
fprintf(stderr,
"Unrecognized verbosity setting ('%s'), only -v and -vv are supported\n",
arg);
return -EINVAL;
}
}
if (env->verbosity > VERBOSE_NONE) {
if (setenv("SELFTESTS_VERBOSE", "1", 1) == -1) {
fprintf(stderr,
"Unable to setenv SELFTESTS_VERBOSE=1 (errno=%d)",
errno);
return -EINVAL;
}
}
break;
case ARG_GET_TEST_CNT:
env->get_test_cnt = true;
break;
case ARG_LIST_TEST_NAMES:
env->list_test_names = true;
break;
case ARG_NUM_WORKERS:
if (arg) {
env->workers = atoi(arg);
if (!env->workers) {
fprintf(stderr, "Invalid number of worker: %s.", arg);
return -EINVAL;
}
} else {
env->workers = get_nprocs();
}
break;
case ARG_DEBUG:
env->debug = true;
break;
case ARGP_KEY_ARG:
argp_usage(state);
break;
case ARGP_KEY_END:
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static void stdio_hijack(void)
{
#ifdef __GLIBC__
env.stdout = stdout;
env.stderr = stderr;
if (env.verbosity > VERBOSE_NONE && env.worker_id == -1) {
/* nothing to do, output to stdout by default */
return;
}
/* stdout and stderr -> buffer */
fflush(stdout);
stdout = open_memstream(&env.log_buf, &env.log_cnt);
if (!stdout) {
stdout = env.stdout;
perror("open_memstream");
return;
}
stderr = stdout;
#endif
}
static void stdio_restore(void)
{
#ifdef __GLIBC__
if (stdout == env.stdout)
return;
fclose(stdout);
stdout = env.stdout;
stderr = env.stderr;
#endif
}
/*
* Determine if test_progs is running as a "flavored" test runner and switch
* into corresponding sub-directory to load correct BPF objects.
*
* This is done by looking at executable name. If it contains "-flavor"
* suffix, then we are running as a flavored test runner.
*/
int cd_flavor_subdir(const char *exec_name)
{
/* General form of argv[0] passed here is:
* some/path/to/test_progs[-flavor], where -flavor part is optional.
* First cut out "test_progs[-flavor]" part, then extract "flavor"
* part, if it's there.
*/
const char *flavor = strrchr(exec_name, '/');
if (!flavor)
return 0;
flavor++;
flavor = strrchr(flavor, '-');
if (!flavor)
return 0;
flavor++;
if (env.verbosity > VERBOSE_NONE)
fprintf(stdout, "Switching to flavor '%s' subdirectory...\n", flavor);
return chdir(flavor);
}
int trigger_module_test_read(int read_sz)
{
int fd, err;
fd = open(BPF_TESTMOD_TEST_FILE, O_RDONLY);
err = -errno;
if (!ASSERT_GE(fd, 0, "testmod_file_open"))
return err;
read(fd, NULL, read_sz);
close(fd);
return 0;
}
int trigger_module_test_write(int write_sz)
{
int fd, err;
char *buf = malloc(write_sz);
if (!buf)
return -ENOMEM;
memset(buf, 'a', write_sz);
buf[write_sz-1] = '\0';
fd = open(BPF_TESTMOD_TEST_FILE, O_WRONLY);
err = -errno;
if (!ASSERT_GE(fd, 0, "testmod_file_open")) {
free(buf);
return err;
}
write(fd, buf, write_sz);
close(fd);
free(buf);
return 0;
}
#define MAX_BACKTRACE_SZ 128
void crash_handler(int signum)
{
void *bt[MAX_BACKTRACE_SZ];
size_t sz;
sz = backtrace(bt, ARRAY_SIZE(bt));
if (env.test)
dump_test_log(env.test, true);
if (env.stdout)
stdio_restore();
if (env.worker_id != -1)
fprintf(stderr, "[%d]: ", env.worker_id);
fprintf(stderr, "Caught signal #%d!\nStack trace:\n", signum);
backtrace_symbols_fd(bt, sz, STDERR_FILENO);
}
static void sigint_handler(int signum)
{
int i;
for (i = 0; i < env.workers; i++)
if (env.worker_socks[i] > 0)
close(env.worker_socks[i]);
}
static int current_test_idx;
static pthread_mutex_t current_test_lock;
static pthread_mutex_t stdout_output_lock;
struct test_result {
int error_cnt;
int skip_cnt;
int sub_succ_cnt;
size_t log_cnt;
char *log_buf;
};
static struct test_result test_results[ARRAY_SIZE(prog_test_defs)];
static inline const char *str_msg(const struct msg *msg, char *buf)
{
switch (msg->type) {
case MSG_DO_TEST:
sprintf(buf, "MSG_DO_TEST %d", msg->do_test.test_num);
break;
case MSG_TEST_DONE:
sprintf(buf, "MSG_TEST_DONE %d (log: %d)",
msg->test_done.test_num,
msg->test_done.have_log);
break;
case MSG_TEST_LOG:
sprintf(buf, "MSG_TEST_LOG (cnt: %ld, last: %d)",
strlen(msg->test_log.log_buf),
msg->test_log.is_last);
break;
case MSG_EXIT:
sprintf(buf, "MSG_EXIT");
break;
default:
sprintf(buf, "UNKNOWN");
break;
}
return buf;
}
static int send_message(int sock, const struct msg *msg)
{
char buf[256];
if (env.debug)
fprintf(stderr, "Sending msg: %s\n", str_msg(msg, buf));
return send(sock, msg, sizeof(*msg), 0);
}
static int recv_message(int sock, struct msg *msg)
{
int ret;
char buf[256];
memset(msg, 0, sizeof(*msg));
ret = recv(sock, msg, sizeof(*msg), 0);
if (ret >= 0) {
if (env.debug)
fprintf(stderr, "Received msg: %s\n", str_msg(msg, buf));
}
return ret;
}
static void run_one_test(int test_num)
{
struct prog_test_def *test = &prog_test_defs[test_num];
env.test = test;
if (test->run_test)
test->run_test();
else if (test->run_serial_test)
test->run_serial_test();
/* ensure last sub-test is finalized properly */
if (test->subtest_name)
test__end_subtest();
test->tested = true;
dump_test_log(test, test->error_cnt);
reset_affinity();
restore_netns();
if (test->need_cgroup_cleanup)
cleanup_cgroup_environment();
}
struct dispatch_data {
int worker_id;
int sock_fd;
};
static void *dispatch_thread(void *ctx)
{
struct dispatch_data *data = ctx;
int sock_fd;
FILE *log_fp = NULL;
sock_fd = data->sock_fd;
while (true) {
int test_to_run = -1;
struct prog_test_def *test;
struct test_result *result;
/* grab a test */
{
pthread_mutex_lock(&current_test_lock);
if (current_test_idx >= prog_test_cnt) {
pthread_mutex_unlock(&current_test_lock);
goto done;
}
test = &prog_test_defs[current_test_idx];
test_to_run = current_test_idx;
current_test_idx++;
pthread_mutex_unlock(&current_test_lock);
}
if (!test->should_run || test->run_serial_test)
continue;
/* run test through worker */
{
struct msg msg_do_test;
msg_do_test.type = MSG_DO_TEST;
msg_do_test.do_test.test_num = test_to_run;
if (send_message(sock_fd, &msg_do_test) < 0) {
perror("Fail to send command");
goto done;
}
env.worker_current_test[data->worker_id] = test_to_run;
}
/* wait for test done */
{
int err;
struct msg msg_test_done;
err = recv_message(sock_fd, &msg_test_done);
if (err < 0)
goto error;
if (msg_test_done.type != MSG_TEST_DONE)
goto error;
if (test_to_run != msg_test_done.test_done.test_num)
goto error;
test->tested = true;
result = &test_results[test_to_run];
result->error_cnt = msg_test_done.test_done.error_cnt;
result->skip_cnt = msg_test_done.test_done.skip_cnt;
result->sub_succ_cnt = msg_test_done.test_done.sub_succ_cnt;
/* collect all logs */
if (msg_test_done.test_done.have_log) {
log_fp = open_memstream(&result->log_buf, &result->log_cnt);
if (!log_fp)
goto error;
while (true) {
struct msg msg_log;
if (recv_message(sock_fd, &msg_log) < 0)
goto error;
if (msg_log.type != MSG_TEST_LOG)
goto error;
fprintf(log_fp, "%s", msg_log.test_log.log_buf);
if (msg_log.test_log.is_last)
break;
}
fclose(log_fp);
log_fp = NULL;
}
/* output log */
{
pthread_mutex_lock(&stdout_output_lock);
if (result->log_cnt) {
result->log_buf[result->log_cnt] = '\0';
fprintf(stdout, "%s", result->log_buf);
if (result->log_buf[result->log_cnt - 1] != '\n')
fprintf(stdout, "\n");
}
fprintf(stdout, "#%d %s:%s\n",
test->test_num, test->test_name,
result->error_cnt ? "FAIL" : (result->skip_cnt ? "SKIP" : "OK"));
pthread_mutex_unlock(&stdout_output_lock);
}
} /* wait for test done */
} /* while (true) */
error:
if (env.debug)
fprintf(stderr, "[%d]: Protocol/IO error: %s.\n", data->worker_id, strerror(errno));
if (log_fp)
fclose(log_fp);
done:
{
struct msg msg_exit;
msg_exit.type = MSG_EXIT;
if (send_message(sock_fd, &msg_exit) < 0) {
if (env.debug)
fprintf(stderr, "[%d]: send_message msg_exit: %s.\n",
data->worker_id, strerror(errno));
}
}
return NULL;
}
static void print_all_error_logs(void)
{
int i;
if (env.fail_cnt)
fprintf(stdout, "\nAll error logs:\n");
/* print error logs again */
for (i = 0; i < prog_test_cnt; i++) {
struct prog_test_def *test;
struct test_result *result;
test = &prog_test_defs[i];
result = &test_results[i];
if (!test->tested || !result->error_cnt)
continue;
fprintf(stdout, "\n#%d %s:%s\n",
test->test_num, test->test_name,
result->error_cnt ? "FAIL" : (result->skip_cnt ? "SKIP" : "OK"));
if (result->log_cnt) {
result->log_buf[result->log_cnt] = '\0';
fprintf(stdout, "%s", result->log_buf);
if (result->log_buf[result->log_cnt - 1] != '\n')
fprintf(stdout, "\n");
}
}
}
static int server_main(void)
{
pthread_t *dispatcher_threads;
struct dispatch_data *data;
struct sigaction sigact_int = {
.sa_handler = sigint_handler,
.sa_flags = SA_RESETHAND,
};
int i;
sigaction(SIGINT, &sigact_int, NULL);
dispatcher_threads = calloc(sizeof(pthread_t), env.workers);
data = calloc(sizeof(struct dispatch_data), env.workers);
env.worker_current_test = calloc(sizeof(int), env.workers);
for (i = 0; i < env.workers; i++) {
int rc;
data[i].worker_id = i;
data[i].sock_fd = env.worker_socks[i];
rc = pthread_create(&dispatcher_threads[i], NULL, dispatch_thread, &data[i]);
if (rc < 0) {
perror("Failed to launch dispatcher thread");
exit(EXIT_ERR_SETUP_INFRA);
}
}
/* wait for all dispatcher to finish */
for (i = 0; i < env.workers; i++) {
while (true) {
int ret = pthread_tryjoin_np(dispatcher_threads[i], NULL);
if (!ret) {
break;
} else if (ret == EBUSY) {
if (env.debug)
fprintf(stderr, "Still waiting for thread %d (test %d).\n",
i, env.worker_current_test[i] + 1);
usleep(1000 * 1000);
continue;
} else {
fprintf(stderr, "Unexpected error joining dispatcher thread: %d", ret);
break;
}
}
}
free(dispatcher_threads);
free(env.worker_current_test);
free(data);
/* run serial tests */
save_netns();
for (int i = 0; i < prog_test_cnt; i++) {
struct prog_test_def *test = &prog_test_defs[i];
struct test_result *result = &test_results[i];
if (!test->should_run || !test->run_serial_test)
continue;
stdio_hijack();
run_one_test(i);
stdio_restore();
if (env.log_buf) {
result->log_cnt = env.log_cnt;
result->log_buf = strdup(env.log_buf);
free(env.log_buf);
env.log_buf = NULL;
env.log_cnt = 0;
}
restore_netns();
fprintf(stdout, "#%d %s:%s\n",
test->test_num, test->test_name,
test->error_cnt ? "FAIL" : (test->skip_cnt ? "SKIP" : "OK"));
result->error_cnt = test->error_cnt;
result->skip_cnt = test->skip_cnt;
result->sub_succ_cnt = test->sub_succ_cnt;
}
/* generate summary */
fflush(stderr);
fflush(stdout);
for (i = 0; i < prog_test_cnt; i++) {
struct prog_test_def *current_test;
struct test_result *result;
current_test = &prog_test_defs[i];
result = &test_results[i];
if (!current_test->tested)
continue;
env.succ_cnt += result->error_cnt ? 0 : 1;
env.skip_cnt += result->skip_cnt;
if (result->error_cnt)
env.fail_cnt++;
env.sub_succ_cnt += result->sub_succ_cnt;
}
print_all_error_logs();
fprintf(stdout, "Summary: %d/%d PASSED, %d SKIPPED, %d FAILED\n",
env.succ_cnt, env.sub_succ_cnt, env.skip_cnt, env.fail_cnt);
/* reap all workers */
for (i = 0; i < env.workers; i++) {
int wstatus, pid;
pid = waitpid(env.worker_pids[i], &wstatus, 0);
if (pid != env.worker_pids[i])
perror("Unable to reap worker");
}
return 0;
}
static int worker_main(int sock)
{
save_netns();
while (true) {
/* receive command */
struct msg msg;
if (recv_message(sock, &msg) < 0)
goto out;
switch (msg.type) {
case MSG_EXIT:
if (env.debug)
fprintf(stderr, "[%d]: worker exit.\n",
env.worker_id);
goto out;
case MSG_DO_TEST: {
int test_to_run;
struct prog_test_def *test;
struct msg msg_done;
test_to_run = msg.do_test.test_num;
test = &prog_test_defs[test_to_run];
if (env.debug)
fprintf(stderr, "[%d]: #%d:%s running.\n",
env.worker_id,
test_to_run + 1,
test->test_name);
stdio_hijack();
run_one_test(test_to_run);
stdio_restore();
memset(&msg_done, 0, sizeof(msg_done));
msg_done.type = MSG_TEST_DONE;
msg_done.test_done.test_num = test_to_run;
msg_done.test_done.error_cnt = test->error_cnt;
msg_done.test_done.skip_cnt = test->skip_cnt;
msg_done.test_done.sub_succ_cnt = test->sub_succ_cnt;
msg_done.test_done.have_log = false;
if (env.verbosity > VERBOSE_NONE || test->force_log || test->error_cnt) {
if (env.log_cnt)
msg_done.test_done.have_log = true;
}
if (send_message(sock, &msg_done) < 0) {
perror("Fail to send message done");
goto out;
}
/* send logs */
if (msg_done.test_done.have_log) {
char *src;
size_t slen;
src = env.log_buf;
slen = env.log_cnt;
while (slen) {
struct msg msg_log;
char *dest;
size_t len;
memset(&msg_log, 0, sizeof(msg_log));
msg_log.type = MSG_TEST_LOG;
dest = msg_log.test_log.log_buf;
len = slen >= MAX_LOG_TRUNK_SIZE ? MAX_LOG_TRUNK_SIZE : slen;
memcpy(dest, src, len);
src += len;
slen -= len;
if (!slen)
msg_log.test_log.is_last = true;
assert(send_message(sock, &msg_log) >= 0);
}
}
if (env.log_buf) {
free(env.log_buf);
env.log_buf = NULL;
env.log_cnt = 0;
}
if (env.debug)
fprintf(stderr, "[%d]: #%d:%s done.\n",
env.worker_id,
test_to_run + 1,
test->test_name);
break;
} /* case MSG_DO_TEST */
default:
if (env.debug)
fprintf(stderr, "[%d]: unknown message.\n", env.worker_id);
return -1;
}
}
out:
return 0;
}
int main(int argc, char **argv)
{
static const struct argp argp = {
.options = opts,
.parser = parse_arg,
.doc = argp_program_doc,
};
struct sigaction sigact = {
.sa_handler = crash_handler,
.sa_flags = SA_RESETHAND,
};
int err, i;
sigaction(SIGSEGV, &sigact, NULL);
err = argp_parse(&argp, argc, argv, 0, NULL, &env);
if (err)
return err;
err = cd_flavor_subdir(argv[0]);
if (err)
return err;
/* Use libbpf 1.0 API mode */
libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
libbpf_set_print(libbpf_print_fn);
srand(time(NULL));
env.jit_enabled = is_jit_enabled();
env.nr_cpus = libbpf_num_possible_cpus();
if (env.nr_cpus < 0) {
fprintf(stderr, "Failed to get number of CPUs: %d!\n",
env.nr_cpus);
return -1;
}
env.stdout = stdout;
env.stderr = stderr;
env.has_testmod = true;
if (!env.list_test_names && load_bpf_testmod()) {
fprintf(env.stderr, "WARNING! Selftests relying on bpf_testmod.ko will be skipped.\n");
env.has_testmod = false;
}
/* initializing tests */
for (i = 0; i < prog_test_cnt; i++) {
struct prog_test_def *test = &prog_test_defs[i];
test->test_num = i + 1;
if (should_run(&env.test_selector,
test->test_num, test->test_name))
test->should_run = true;
else
test->should_run = false;
if ((test->run_test == NULL && test->run_serial_test == NULL) ||
(test->run_test != NULL && test->run_serial_test != NULL)) {
fprintf(stderr, "Test %d:%s must have either test_%s() or serial_test_%sl() defined.\n",
test->test_num, test->test_name, test->test_name, test->test_name);
exit(EXIT_ERR_SETUP_INFRA);
}
}
/* ignore workers if we are just listing */
if (env.get_test_cnt || env.list_test_names)
env.workers = 0;
/* launch workers if requested */
env.worker_id = -1; /* main process */
if (env.workers) {
env.worker_pids = calloc(sizeof(__pid_t), env.workers);
env.worker_socks = calloc(sizeof(int), env.workers);
if (env.debug)
fprintf(stdout, "Launching %d workers.\n", env.workers);
for (i = 0; i < env.workers; i++) {
int sv[2];
pid_t pid;
if (socketpair(AF_UNIX, SOCK_SEQPACKET | SOCK_CLOEXEC, 0, sv) < 0) {
perror("Fail to create worker socket");
return -1;
}
pid = fork();
if (pid < 0) {
perror("Failed to fork worker");
return -1;
} else if (pid != 0) { /* main process */
close(sv[1]);
env.worker_pids[i] = pid;
env.worker_socks[i] = sv[0];
} else { /* inside each worker process */
close(sv[0]);
env.worker_id = i;
return worker_main(sv[1]);
}
}
if (env.worker_id == -1) {
server_main();
goto out;
}
}
/* The rest of the main process */
/* on single mode */
save_netns();
for (i = 0; i < prog_test_cnt; i++) {
struct prog_test_def *test = &prog_test_defs[i];
struct test_result *result;
if (!test->should_run)
continue;
if (env.get_test_cnt) {
env.succ_cnt++;
continue;
}
if (env.list_test_names) {
fprintf(env.stdout, "%s\n", test->test_name);
env.succ_cnt++;
continue;
}
stdio_hijack();
run_one_test(i);
stdio_restore();
fprintf(env.stdout, "#%d %s:%s\n",
test->test_num, test->test_name,
test->error_cnt ? "FAIL" : (test->skip_cnt ? "SKIP" : "OK"));
result = &test_results[i];
result->error_cnt = test->error_cnt;
if (env.log_buf) {
result->log_buf = strdup(env.log_buf);
result->log_cnt = env.log_cnt;
free(env.log_buf);
env.log_buf = NULL;
env.log_cnt = 0;
}
if (test->error_cnt)
env.fail_cnt++;
else
env.succ_cnt++;
skip_account();
env.sub_succ_cnt += test->sub_succ_cnt;
}
if (env.get_test_cnt) {
printf("%d\n", env.succ_cnt);
goto out;
}
if (env.list_test_names)
goto out;
print_all_error_logs();
fprintf(stdout, "Summary: %d/%d PASSED, %d SKIPPED, %d FAILED\n",
env.succ_cnt, env.sub_succ_cnt, env.skip_cnt, env.fail_cnt);
close(env.saved_netns_fd);
out:
if (!env.list_test_names && env.has_testmod)
unload_bpf_testmod();
free_str_set(&env.test_selector.blacklist);
free_str_set(&env.test_selector.whitelist);
free(env.test_selector.num_set);
free_str_set(&env.subtest_selector.blacklist);
free_str_set(&env.subtest_selector.whitelist);
free(env.subtest_selector.num_set);
if (env.succ_cnt + env.fail_cnt + env.skip_cnt == 0)
return EXIT_NO_TEST;
return env.fail_cnt ? EXIT_FAILURE : EXIT_SUCCESS;
}