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// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <string.h>
#include <assert.h>
#include <linux/perf_event.h>
#include <linux/ptrace.h>
#include <linux/bpf.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <bpf/bpf.h>
#include <bpf/libbpf.h>
#include "bpf_util.h"
#include <linux/perf_event.h>
#include "test_tcpbpf.h"
static 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) {
printf("%s:FAIL:map '%s' not found\n", test, name);
return -1;
}
return bpf_map__fd(map);
}
#define SYSTEM(CMD) \
do { \
if (system(CMD)) { \
printf("system(%s) FAILS!\n", CMD); \
} \
} while (0)
int main(int argc, char **argv)
{
struct rlimit limit = { RLIM_INFINITY, RLIM_INFINITY };
const char *file = "test_tcpbpf_kern.o";
struct tcpbpf_globals g = {0};
int cg_fd, prog_fd, map_fd;
bool debug_flag = false;
int error = EXIT_FAILURE;
struct bpf_object *obj;
char cmd[100], *dir;
struct stat buffer;
__u32 key = 0;
int pid;
int rv;
if (setrlimit(RLIMIT_MEMLOCK, &limit) < 0)
perror("Unable to lift memlock rlimit");
if (argc > 1 && strcmp(argv[1], "-d") == 0)
debug_flag = true;
dir = "/tmp/cgroupv2/foo";
if (stat(dir, &buffer) != 0) {
SYSTEM("mkdir -p /tmp/cgroupv2");
SYSTEM("mount -t cgroup2 none /tmp/cgroupv2");
SYSTEM("mkdir -p /tmp/cgroupv2/foo");
}
pid = (int) getpid();
sprintf(cmd, "echo %d >> /tmp/cgroupv2/foo/cgroup.procs", pid);
SYSTEM(cmd);
cg_fd = open(dir, O_DIRECTORY, O_RDONLY);
if (bpf_prog_load(file, BPF_PROG_TYPE_SOCK_OPS, &obj, &prog_fd)) {
printf("FAILED: load_bpf_file failed for: %s\n", file);
goto err;
}
rv = bpf_prog_attach(prog_fd, cg_fd, BPF_CGROUP_SOCK_OPS, 0);
if (rv) {
printf("FAILED: bpf_prog_attach: %d (%s)\n",
error, strerror(errno));
goto err;
}
SYSTEM("./tcp_server.py");
map_fd = bpf_find_map(__func__, obj, "global_map");
if (map_fd < 0)
goto err;
rv = bpf_map_lookup_elem(map_fd, &key, &g);
if (rv != 0) {
printf("FAILED: bpf_map_lookup_elem returns %d\n", rv);
goto err;
}
if (g.bytes_received != 501 || g.bytes_acked != 1002 ||
g.data_segs_in != 1 || g.data_segs_out != 1 ||
(g.event_map ^ 0x47e) != 0 || g.bad_cb_test_rv != 0x80 ||
g.good_cb_test_rv != 0) {
printf("FAILED: Wrong stats\n");
if (debug_flag) {
printf("\n");
printf("bytes_received: %d (expecting 501)\n",
(int)g.bytes_received);
printf("bytes_acked: %d (expecting 1002)\n",
(int)g.bytes_acked);
printf("data_segs_in: %d (expecting 1)\n",
g.data_segs_in);
printf("data_segs_out: %d (expecting 1)\n",
g.data_segs_out);
printf("event_map: 0x%x (at least 0x47e)\n",
g.event_map);
printf("bad_cb_test_rv: 0x%x (expecting 0x80)\n",
g.bad_cb_test_rv);
printf("good_cb_test_rv:0x%x (expecting 0)\n",
g.good_cb_test_rv);
}
goto err;
}
printf("PASSED!\n");
error = 0;
err:
bpf_prog_detach(cg_fd, BPF_CGROUP_SOCK_OPS);
return error;
}
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