diff options
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/bpf_obj_id.c')
-rw-r--r-- | tools/testing/selftests/bpf/prog_tests/bpf_obj_id.c | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_obj_id.c b/tools/testing/selftests/bpf/prog_tests/bpf_obj_id.c new file mode 100644 index 000000000000..a64f7a02139c --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/bpf_obj_id.c @@ -0,0 +1,249 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <test_progs.h> + +void test_bpf_obj_id(void) +{ + const __u64 array_magic_value = 0xfaceb00c; + const __u32 array_key = 0; + const int nr_iters = 2; + const char *file = "./test_obj_id.o"; + const char *expected_prog_name = "test_obj_id"; + const char *expected_map_name = "test_map_id"; + const __u64 nsec_per_sec = 1000000000; + + struct bpf_object *objs[nr_iters]; + int prog_fds[nr_iters], map_fds[nr_iters]; + /* +1 to test for the info_len returned by kernel */ + struct bpf_prog_info prog_infos[nr_iters + 1]; + struct bpf_map_info map_infos[nr_iters + 1]; + /* Each prog only uses one map. +1 to test nr_map_ids + * returned by kernel. + */ + __u32 map_ids[nr_iters + 1]; + char jited_insns[128], xlated_insns[128], zeros[128]; + __u32 i, next_id, info_len, nr_id_found, duration = 0; + struct timespec real_time_ts, boot_time_ts; + int err = 0; + __u64 array_value; + uid_t my_uid = getuid(); + time_t now, load_time; + + err = bpf_prog_get_fd_by_id(0); + CHECK(err >= 0 || errno != ENOENT, + "get-fd-by-notexist-prog-id", "err %d errno %d\n", err, errno); + + err = bpf_map_get_fd_by_id(0); + CHECK(err >= 0 || errno != ENOENT, + "get-fd-by-notexist-map-id", "err %d errno %d\n", err, errno); + + for (i = 0; i < nr_iters; i++) + objs[i] = NULL; + + /* Check bpf_obj_get_info_by_fd() */ + bzero(zeros, sizeof(zeros)); + for (i = 0; i < nr_iters; i++) { + now = time(NULL); + err = bpf_prog_load(file, BPF_PROG_TYPE_SOCKET_FILTER, + &objs[i], &prog_fds[i]); + /* test_obj_id.o is a dumb prog. It should never fail + * to load. + */ + if (err) + error_cnt++; + assert(!err); + + /* Insert a magic value to the map */ + map_fds[i] = bpf_find_map(__func__, objs[i], "test_map_id"); + assert(map_fds[i] >= 0); + err = bpf_map_update_elem(map_fds[i], &array_key, + &array_magic_value, 0); + assert(!err); + + /* Check getting map info */ + info_len = sizeof(struct bpf_map_info) * 2; + bzero(&map_infos[i], info_len); + err = bpf_obj_get_info_by_fd(map_fds[i], &map_infos[i], + &info_len); + if (CHECK(err || + map_infos[i].type != BPF_MAP_TYPE_ARRAY || + map_infos[i].key_size != sizeof(__u32) || + map_infos[i].value_size != sizeof(__u64) || + map_infos[i].max_entries != 1 || + map_infos[i].map_flags != 0 || + info_len != sizeof(struct bpf_map_info) || + strcmp((char *)map_infos[i].name, expected_map_name), + "get-map-info(fd)", + "err %d errno %d type %d(%d) info_len %u(%Zu) key_size %u value_size %u max_entries %u map_flags %X name %s(%s)\n", + err, errno, + map_infos[i].type, BPF_MAP_TYPE_ARRAY, + info_len, sizeof(struct bpf_map_info), + map_infos[i].key_size, + map_infos[i].value_size, + map_infos[i].max_entries, + map_infos[i].map_flags, + map_infos[i].name, expected_map_name)) + goto done; + + /* Check getting prog info */ + info_len = sizeof(struct bpf_prog_info) * 2; + bzero(&prog_infos[i], info_len); + bzero(jited_insns, sizeof(jited_insns)); + bzero(xlated_insns, sizeof(xlated_insns)); + prog_infos[i].jited_prog_insns = ptr_to_u64(jited_insns); + prog_infos[i].jited_prog_len = sizeof(jited_insns); + prog_infos[i].xlated_prog_insns = ptr_to_u64(xlated_insns); + prog_infos[i].xlated_prog_len = sizeof(xlated_insns); + prog_infos[i].map_ids = ptr_to_u64(map_ids + i); + prog_infos[i].nr_map_ids = 2; + err = clock_gettime(CLOCK_REALTIME, &real_time_ts); + assert(!err); + err = clock_gettime(CLOCK_BOOTTIME, &boot_time_ts); + assert(!err); + err = bpf_obj_get_info_by_fd(prog_fds[i], &prog_infos[i], + &info_len); + load_time = (real_time_ts.tv_sec - boot_time_ts.tv_sec) + + (prog_infos[i].load_time / nsec_per_sec); + if (CHECK(err || + prog_infos[i].type != BPF_PROG_TYPE_SOCKET_FILTER || + info_len != sizeof(struct bpf_prog_info) || + (jit_enabled && !prog_infos[i].jited_prog_len) || + (jit_enabled && + !memcmp(jited_insns, zeros, sizeof(zeros))) || + !prog_infos[i].xlated_prog_len || + !memcmp(xlated_insns, zeros, sizeof(zeros)) || + load_time < now - 60 || load_time > now + 60 || + prog_infos[i].created_by_uid != my_uid || + prog_infos[i].nr_map_ids != 1 || + *(int *)(long)prog_infos[i].map_ids != map_infos[i].id || + strcmp((char *)prog_infos[i].name, expected_prog_name), + "get-prog-info(fd)", + "err %d errno %d i %d type %d(%d) info_len %u(%Zu) jit_enabled %d jited_prog_len %u xlated_prog_len %u jited_prog %d xlated_prog %d load_time %lu(%lu) uid %u(%u) nr_map_ids %u(%u) map_id %u(%u) name %s(%s)\n", + err, errno, i, + prog_infos[i].type, BPF_PROG_TYPE_SOCKET_FILTER, + info_len, sizeof(struct bpf_prog_info), + jit_enabled, + prog_infos[i].jited_prog_len, + prog_infos[i].xlated_prog_len, + !!memcmp(jited_insns, zeros, sizeof(zeros)), + !!memcmp(xlated_insns, zeros, sizeof(zeros)), + load_time, now, + prog_infos[i].created_by_uid, my_uid, + prog_infos[i].nr_map_ids, 1, + *(int *)(long)prog_infos[i].map_ids, map_infos[i].id, + prog_infos[i].name, expected_prog_name)) + goto done; + } + + /* Check bpf_prog_get_next_id() */ + nr_id_found = 0; + next_id = 0; + while (!bpf_prog_get_next_id(next_id, &next_id)) { + struct bpf_prog_info prog_info = {}; + __u32 saved_map_id; + int prog_fd; + + info_len = sizeof(prog_info); + + prog_fd = bpf_prog_get_fd_by_id(next_id); + if (prog_fd < 0 && errno == ENOENT) + /* The bpf_prog is in the dead row */ + continue; + if (CHECK(prog_fd < 0, "get-prog-fd(next_id)", + "prog_fd %d next_id %d errno %d\n", + prog_fd, next_id, errno)) + break; + + for (i = 0; i < nr_iters; i++) + if (prog_infos[i].id == next_id) + break; + + if (i == nr_iters) + continue; + + nr_id_found++; + + /* Negative test: + * prog_info.nr_map_ids = 1 + * prog_info.map_ids = NULL + */ + prog_info.nr_map_ids = 1; + err = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &info_len); + if (CHECK(!err || errno != EFAULT, + "get-prog-fd-bad-nr-map-ids", "err %d errno %d(%d)", + err, errno, EFAULT)) + break; + bzero(&prog_info, sizeof(prog_info)); + info_len = sizeof(prog_info); + + saved_map_id = *(int *)((long)prog_infos[i].map_ids); + prog_info.map_ids = prog_infos[i].map_ids; + prog_info.nr_map_ids = 2; + err = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &info_len); + prog_infos[i].jited_prog_insns = 0; + prog_infos[i].xlated_prog_insns = 0; + CHECK(err || info_len != sizeof(struct bpf_prog_info) || + memcmp(&prog_info, &prog_infos[i], info_len) || + *(int *)(long)prog_info.map_ids != saved_map_id, + "get-prog-info(next_id->fd)", + "err %d errno %d info_len %u(%Zu) memcmp %d map_id %u(%u)\n", + err, errno, info_len, sizeof(struct bpf_prog_info), + memcmp(&prog_info, &prog_infos[i], info_len), + *(int *)(long)prog_info.map_ids, saved_map_id); + close(prog_fd); + } + CHECK(nr_id_found != nr_iters, + "check total prog id found by get_next_id", + "nr_id_found %u(%u)\n", + nr_id_found, nr_iters); + + /* Check bpf_map_get_next_id() */ + nr_id_found = 0; + next_id = 0; + while (!bpf_map_get_next_id(next_id, &next_id)) { + struct bpf_map_info map_info = {}; + int map_fd; + + info_len = sizeof(map_info); + + map_fd = bpf_map_get_fd_by_id(next_id); + if (map_fd < 0 && errno == ENOENT) + /* The bpf_map is in the dead row */ + continue; + if (CHECK(map_fd < 0, "get-map-fd(next_id)", + "map_fd %d next_id %u errno %d\n", + map_fd, next_id, errno)) + break; + + for (i = 0; i < nr_iters; i++) + if (map_infos[i].id == next_id) + break; + + if (i == nr_iters) + continue; + + nr_id_found++; + + err = bpf_map_lookup_elem(map_fd, &array_key, &array_value); + assert(!err); + + err = bpf_obj_get_info_by_fd(map_fd, &map_info, &info_len); + CHECK(err || info_len != sizeof(struct bpf_map_info) || + memcmp(&map_info, &map_infos[i], info_len) || + array_value != array_magic_value, + "check get-map-info(next_id->fd)", + "err %d errno %d info_len %u(%Zu) memcmp %d array_value %llu(%llu)\n", + err, errno, info_len, sizeof(struct bpf_map_info), + memcmp(&map_info, &map_infos[i], info_len), + array_value, array_magic_value); + + close(map_fd); + } + CHECK(nr_id_found != nr_iters, + "check total map id found by get_next_id", + "nr_id_found %u(%u)\n", + nr_id_found, nr_iters); + +done: + for (i = 0; i < nr_iters; i++) + bpf_object__close(objs[i]); +} |