1 // SPDX-License-Identifier: GPL-2.0
9 #include <sys/syscall.h>
12 #include <linux/bpf.h>
13 #include <sys/socket.h>
15 #include <bpf/libbpf.h>
16 #include <sys/ioctl.h>
17 #include <linux/rtnetlink.h>
19 #include <linux/perf_event.h>
20 #include <linux/err.h>
22 #include "bpf_rlimit.h"
24 #include "cgroup_helpers.h"
26 #include "test_tcpnotify.h"
27 #include "trace_helpers.h"
29 #define SOCKET_BUFFER_SIZE (getpagesize() < 8192L ? getpagesize() : 8192L)
34 static void dummyfn(void *ctx, int cpu, void *data, __u32 size)
36 struct tcp_notifier *t = data;
38 if (t->type != 0xde || t->subtype != 0xad ||
39 t->source != 0xbe || t->hash != 0xef)
44 void tcp_notifier_poller(struct perf_buffer *pb)
49 err = perf_buffer__poll(pb, 100);
50 if (err < 0 && err != -EINTR) {
51 printf("failed perf_buffer__poll: %d\n", err);
57 static void *poller_thread(void *arg)
59 struct perf_buffer *pb = arg;
61 tcp_notifier_poller(pb);
65 int verify_result(const struct tcpnotify_globals *result)
67 return (result->ncalls > 0 && result->ncalls == rx_callbacks ? 0 : 1);
70 int main(int argc, char **argv)
72 const char *file = "test_tcpnotify_kern.o";
73 struct bpf_map *perf_map, *global_map;
74 struct perf_buffer_opts pb_opts = {};
75 struct tcpnotify_globals g = {0};
76 struct perf_buffer *pb = NULL;
77 const char *cg_path = "/foo";
78 int prog_fd, rv, cg_fd = -1;
79 int error = EXIT_FAILURE;
80 struct bpf_object *obj;
87 pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);
89 if (setup_cgroup_environment())
92 cg_fd = create_and_get_cgroup(cg_path);
96 if (join_cgroup(cg_path))
99 if (bpf_prog_load(file, BPF_PROG_TYPE_SOCK_OPS, &obj, &prog_fd)) {
100 printf("FAILED: load_bpf_file failed for: %s\n", file);
104 rv = bpf_prog_attach(prog_fd, cg_fd, BPF_CGROUP_SOCK_OPS, 0);
106 printf("FAILED: bpf_prog_attach: %d (%s)\n",
107 error, strerror(errno));
111 perf_map = bpf_object__find_map_by_name(obj, "perf_event_map");
113 printf("FAIL:map '%s' not found\n", "perf_event_map");
117 global_map = bpf_object__find_map_by_name(obj, "global_map");
119 printf("FAIL:map '%s' not found\n", "global_map");
123 pb_opts.sample_cb = dummyfn;
124 pb = perf_buffer__new(bpf_map__fd(perf_map), 8, &pb_opts);
128 pthread_create(&tid, NULL, poller_thread, pb);
131 "iptables -A INPUT -p tcp --dport %d -j DROP",
136 "nc 127.0.0.1 %d < /etc/passwd > /dev/null 2>&1 ",
141 "iptables -D INPUT -p tcp --dport %d -j DROP",
145 rv = bpf_map_lookup_elem(bpf_map__fd(global_map), &key, &g);
147 printf("FAILED: bpf_map_lookup_elem returns %d\n", rv);
153 if (verify_result(&g)) {
154 printf("FAILED: Wrong stats Expected %d calls, got %d\n",
155 g.ncalls, rx_callbacks);
162 bpf_prog_detach(cg_fd, BPF_CGROUP_SOCK_OPS);
164 cleanup_cgroup_environment();
165 if (!IS_ERR_OR_NULL(pb))
166 perf_buffer__free(pb);