diff options
Diffstat (limited to 'tools/testing/selftests/bpf/test_tcpbpf_user.c')
| -rw-r--r-- | tools/testing/selftests/bpf/test_tcpbpf_user.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/test_tcpbpf_user.c b/tools/testing/selftests/bpf/test_tcpbpf_user.c new file mode 100644 index 000000000..74a9e4998 --- /dev/null +++ b/tools/testing/selftests/bpf/test_tcpbpf_user.c @@ -0,0 +1,165 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <inttypes.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <errno.h> +#include <string.h> +#include <linux/bpf.h> +#include <sys/types.h> +#include <bpf/bpf.h> +#include <bpf/libbpf.h> + +#include "bpf_rlimit.h" +#include "bpf_util.h" +#include "cgroup_helpers.h" + +#include "test_tcpbpf.h" + +/* 3 comes from one listening socket + both ends of the connection */ +#define EXPECTED_CLOSE_EVENTS 3 + +#define EXPECT_EQ(expected, actual, fmt) \ + do { \ + if ((expected) != (actual)) { \ + printf(" Value of: " #actual "\n" \ + " Actual: %" fmt "\n" \ + " Expected: %" fmt "\n", \ + (actual), (expected)); \ + ret--; \ + } \ + } while (0) + +int verify_result(const struct tcpbpf_globals *result) +{ + __u32 expected_events; + int ret = 0; + + expected_events = ((1 << BPF_SOCK_OPS_TIMEOUT_INIT) | + (1 << BPF_SOCK_OPS_RWND_INIT) | + (1 << BPF_SOCK_OPS_TCP_CONNECT_CB) | + (1 << BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB) | + (1 << BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB) | + (1 << BPF_SOCK_OPS_NEEDS_ECN) | + (1 << BPF_SOCK_OPS_STATE_CB) | + (1 << BPF_SOCK_OPS_TCP_LISTEN_CB)); + + EXPECT_EQ(expected_events, result->event_map, "#" PRIx32); + EXPECT_EQ(501ULL, result->bytes_received, "llu"); + EXPECT_EQ(1002ULL, result->bytes_acked, "llu"); + EXPECT_EQ(1, result->data_segs_in, PRIu32); + EXPECT_EQ(1, result->data_segs_out, PRIu32); + EXPECT_EQ(0x80, result->bad_cb_test_rv, PRIu32); + EXPECT_EQ(0, result->good_cb_test_rv, PRIu32); + EXPECT_EQ(1, result->num_listen, PRIu32); + EXPECT_EQ(EXPECTED_CLOSE_EVENTS, result->num_close_events, PRIu32); + + return ret; +} + +int verify_sockopt_result(int sock_map_fd) +{ + __u32 key = 0; + int ret = 0; + int res; + int rv; + + /* check setsockopt for SAVE_SYN */ + rv = bpf_map_lookup_elem(sock_map_fd, &key, &res); + EXPECT_EQ(0, rv, "d"); + EXPECT_EQ(0, res, "d"); + key = 1; + /* check getsockopt for SAVED_SYN */ + rv = bpf_map_lookup_elem(sock_map_fd, &key, &res); + EXPECT_EQ(0, rv, "d"); + EXPECT_EQ(1, res, "d"); + return ret; +} + +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); +} + +int main(int argc, char **argv) +{ + const char *file = "test_tcpbpf_kern.o"; + int prog_fd, map_fd, sock_map_fd; + struct tcpbpf_globals g = {0}; + const char *cg_path = "/foo"; + int error = EXIT_FAILURE; + struct bpf_object *obj; + int cg_fd = -1; + int retry = 10; + __u32 key = 0; + int rv; + + cg_fd = cgroup_setup_and_join(cg_path); + if (cg_fd < 0) + goto err; + + 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; + } + + if (system("./tcp_server.py")) { + printf("FAILED: TCP server\n"); + goto err; + } + + map_fd = bpf_find_map(__func__, obj, "global_map"); + if (map_fd < 0) + goto err; + + sock_map_fd = bpf_find_map(__func__, obj, "sockopt_results"); + if (sock_map_fd < 0) + goto err; + +retry_lookup: + 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.num_close_events != EXPECTED_CLOSE_EVENTS && retry--) { + printf("Unexpected number of close events (%d), retrying!\n", + g.num_close_events); + usleep(100); + goto retry_lookup; + } + + if (verify_result(&g)) { + printf("FAILED: Wrong stats\n"); + goto err; + } + + if (verify_sockopt_result(sock_map_fd)) { + printf("FAILED: Wrong sockopt stats\n"); + goto err; + } + + printf("PASSED!\n"); + error = 0; +err: + bpf_prog_detach(cg_fd, BPF_CGROUP_SOCK_OPS); + close(cg_fd); + cleanup_cgroup_environment(); + return error; +} |