summaryrefslogtreecommitdiffstats
path: root/tools/testing/selftests/bpf/test_tcpnotify_user.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/testing/selftests/bpf/test_tcpnotify_user.c')
-rw-r--r--tools/testing/selftests/bpf/test_tcpnotify_user.c168
1 files changed, 168 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/test_tcpnotify_user.c b/tools/testing/selftests/bpf/test_tcpnotify_user.c
new file mode 100644
index 000000000..595194453
--- /dev/null
+++ b/tools/testing/selftests/bpf/test_tcpnotify_user.c
@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: GPL-2.0
+#define _GNU_SOURCE
+#include <pthread.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <asm/types.h>
+#include <sys/syscall.h>
+#include <errno.h>
+#include <string.h>
+#include <linux/bpf.h>
+#include <sys/socket.h>
+#include <bpf/bpf.h>
+#include <bpf/libbpf.h>
+#include <sys/ioctl.h>
+#include <linux/rtnetlink.h>
+#include <signal.h>
+#include <linux/perf_event.h>
+#include <linux/err.h>
+
+#include "bpf_util.h"
+#include "cgroup_helpers.h"
+
+#include "test_tcpnotify.h"
+#include "trace_helpers.h"
+#include "testing_helpers.h"
+
+#define SOCKET_BUFFER_SIZE (getpagesize() < 8192L ? getpagesize() : 8192L)
+
+pthread_t tid;
+int rx_callbacks;
+
+static void dummyfn(void *ctx, int cpu, void *data, __u32 size)
+{
+ struct tcp_notifier *t = data;
+
+ if (t->type != 0xde || t->subtype != 0xad ||
+ t->source != 0xbe || t->hash != 0xef)
+ return;
+ rx_callbacks++;
+}
+
+void tcp_notifier_poller(struct perf_buffer *pb)
+{
+ int err;
+
+ while (1) {
+ err = perf_buffer__poll(pb, 100);
+ if (err < 0 && err != -EINTR) {
+ printf("failed perf_buffer__poll: %d\n", err);
+ return;
+ }
+ }
+}
+
+static void *poller_thread(void *arg)
+{
+ struct perf_buffer *pb = arg;
+
+ tcp_notifier_poller(pb);
+ return arg;
+}
+
+int verify_result(const struct tcpnotify_globals *result)
+{
+ return (result->ncalls > 0 && result->ncalls == rx_callbacks ? 0 : 1);
+}
+
+int main(int argc, char **argv)
+{
+ const char *file = "test_tcpnotify_kern.bpf.o";
+ struct bpf_map *perf_map, *global_map;
+ struct tcpnotify_globals g = {0};
+ struct perf_buffer *pb = NULL;
+ const char *cg_path = "/foo";
+ int prog_fd, rv, cg_fd = -1;
+ int error = EXIT_FAILURE;
+ struct bpf_object *obj;
+ char test_script[80];
+ cpu_set_t cpuset;
+ __u32 key = 0;
+
+ libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
+
+ CPU_ZERO(&cpuset);
+ CPU_SET(0, &cpuset);
+ pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);
+
+ cg_fd = cgroup_setup_and_join(cg_path);
+ if (cg_fd < 0)
+ goto err;
+
+ if (bpf_prog_test_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;
+ }
+
+ perf_map = bpf_object__find_map_by_name(obj, "perf_event_map");
+ if (!perf_map) {
+ printf("FAIL:map '%s' not found\n", "perf_event_map");
+ goto err;
+ }
+
+ global_map = bpf_object__find_map_by_name(obj, "global_map");
+ if (!global_map) {
+ printf("FAIL:map '%s' not found\n", "global_map");
+ return -1;
+ }
+
+ pb = perf_buffer__new(bpf_map__fd(perf_map), 8, dummyfn, NULL, NULL, NULL);
+ if (!pb)
+ goto err;
+
+ pthread_create(&tid, NULL, poller_thread, pb);
+
+ sprintf(test_script,
+ "iptables -A INPUT -p tcp --dport %d -j DROP",
+ TESTPORT);
+ if (system(test_script)) {
+ printf("FAILED: execute command: %s, err %d\n", test_script, -errno);
+ goto err;
+ }
+
+ sprintf(test_script,
+ "nc 127.0.0.1 %d < /etc/passwd > /dev/null 2>&1 ",
+ TESTPORT);
+ if (system(test_script))
+ printf("execute command: %s, err %d\n", test_script, -errno);
+
+ sprintf(test_script,
+ "iptables -D INPUT -p tcp --dport %d -j DROP",
+ TESTPORT);
+ if (system(test_script)) {
+ printf("FAILED: execute command: %s, err %d\n", test_script, -errno);
+ goto err;
+ }
+
+ rv = bpf_map_lookup_elem(bpf_map__fd(global_map), &key, &g);
+ if (rv != 0) {
+ printf("FAILED: bpf_map_lookup_elem returns %d\n", rv);
+ goto err;
+ }
+
+ sleep(10);
+
+ if (verify_result(&g)) {
+ printf("FAILED: Wrong stats Expected %d calls, got %d\n",
+ g.ncalls, rx_callbacks);
+ goto err;
+ }
+
+ printf("PASSED!\n");
+ error = 0;
+err:
+ bpf_prog_detach(cg_fd, BPF_CGROUP_SOCK_OPS);
+ close(cg_fd);
+ cleanup_cgroup_environment();
+ perf_buffer__free(pb);
+ return error;
+}