afef88e655
BPF object files are, in a way, the final artifact produced as part of the ahead-of-time compilation process. That makes them somewhat special compared to "regular" object files, which are a intermediate build artifacts that can typically be removed safely. As such, it can make sense to name them differently to make it easier to spot this difference at a glance. Among others, libbpf-bootstrap [0] has established the extension .bpf.o for BPF object files. It seems reasonable to follow this example and establish the same denomination for selftest build artifacts. To that end, this change adjusts the corresponding part of the build system and the test programs loading BPF object files to work with .bpf.o files. [0] https://github.com/libbpf/libbpf-bootstrap Suggested-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Müller <deso@posteo.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20220901222253.1199242-1-deso@posteo.net
346 lines
11 KiB
C
346 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <test_progs.h>
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#define nr_iters 2
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void serial_test_bpf_obj_id(void)
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{
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const __u64 array_magic_value = 0xfaceb00c;
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const __u32 array_key = 0;
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const char *file = "./test_obj_id.bpf.o";
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const char *expected_prog_name = "test_obj_id";
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const char *expected_map_name = "test_map_id";
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const __u64 nsec_per_sec = 1000000000;
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struct bpf_object *objs[nr_iters] = {};
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struct bpf_link *links[nr_iters] = {};
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struct bpf_program *prog;
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int prog_fds[nr_iters], map_fds[nr_iters];
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/* +1 to test for the info_len returned by kernel */
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struct bpf_prog_info prog_infos[nr_iters + 1];
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struct bpf_map_info map_infos[nr_iters + 1];
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struct bpf_link_info link_infos[nr_iters + 1];
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/* Each prog only uses one map. +1 to test nr_map_ids
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* returned by kernel.
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*/
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__u32 map_ids[nr_iters + 1];
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char jited_insns[128], xlated_insns[128], zeros[128], tp_name[128];
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__u32 i, next_id, info_len, nr_id_found, duration = 0;
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struct timespec real_time_ts, boot_time_ts;
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int err = 0;
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__u64 array_value;
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uid_t my_uid = getuid();
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time_t now, load_time;
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err = bpf_prog_get_fd_by_id(0);
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CHECK(err >= 0 || errno != ENOENT,
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"get-fd-by-notexist-prog-id", "err %d errno %d\n", err, errno);
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err = bpf_map_get_fd_by_id(0);
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CHECK(err >= 0 || errno != ENOENT,
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"get-fd-by-notexist-map-id", "err %d errno %d\n", err, errno);
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err = bpf_link_get_fd_by_id(0);
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CHECK(err >= 0 || errno != ENOENT,
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"get-fd-by-notexist-link-id", "err %d errno %d\n", err, errno);
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/* Check bpf_obj_get_info_by_fd() */
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bzero(zeros, sizeof(zeros));
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for (i = 0; i < nr_iters; i++) {
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now = time(NULL);
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err = bpf_prog_test_load(file, BPF_PROG_TYPE_RAW_TRACEPOINT,
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&objs[i], &prog_fds[i]);
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/* test_obj_id.o is a dumb prog. It should never fail
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* to load.
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*/
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if (CHECK_FAIL(err))
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continue;
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/* Insert a magic value to the map */
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map_fds[i] = bpf_find_map(__func__, objs[i], "test_map_id");
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if (CHECK_FAIL(map_fds[i] < 0))
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goto done;
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err = bpf_map_update_elem(map_fds[i], &array_key,
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&array_magic_value, 0);
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if (CHECK_FAIL(err))
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goto done;
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prog = bpf_object__find_program_by_name(objs[i],
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"test_obj_id");
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if (CHECK_FAIL(!prog))
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goto done;
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links[i] = bpf_program__attach(prog);
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err = libbpf_get_error(links[i]);
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if (CHECK(err, "prog_attach", "prog #%d, err %d\n", i, err)) {
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links[i] = NULL;
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goto done;
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}
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/* Check getting map info */
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info_len = sizeof(struct bpf_map_info) * 2;
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bzero(&map_infos[i], info_len);
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err = bpf_obj_get_info_by_fd(map_fds[i], &map_infos[i],
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&info_len);
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if (CHECK(err ||
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map_infos[i].type != BPF_MAP_TYPE_ARRAY ||
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map_infos[i].key_size != sizeof(__u32) ||
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map_infos[i].value_size != sizeof(__u64) ||
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map_infos[i].max_entries != 1 ||
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map_infos[i].map_flags != 0 ||
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info_len != sizeof(struct bpf_map_info) ||
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strcmp((char *)map_infos[i].name, expected_map_name),
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"get-map-info(fd)",
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"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",
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err, errno,
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map_infos[i].type, BPF_MAP_TYPE_ARRAY,
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info_len, sizeof(struct bpf_map_info),
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map_infos[i].key_size,
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map_infos[i].value_size,
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map_infos[i].max_entries,
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map_infos[i].map_flags,
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map_infos[i].name, expected_map_name))
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goto done;
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/* Check getting prog info */
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info_len = sizeof(struct bpf_prog_info) * 2;
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bzero(&prog_infos[i], info_len);
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bzero(jited_insns, sizeof(jited_insns));
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bzero(xlated_insns, sizeof(xlated_insns));
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prog_infos[i].jited_prog_insns = ptr_to_u64(jited_insns);
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prog_infos[i].jited_prog_len = sizeof(jited_insns);
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prog_infos[i].xlated_prog_insns = ptr_to_u64(xlated_insns);
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prog_infos[i].xlated_prog_len = sizeof(xlated_insns);
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prog_infos[i].map_ids = ptr_to_u64(map_ids + i);
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prog_infos[i].nr_map_ids = 2;
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err = clock_gettime(CLOCK_REALTIME, &real_time_ts);
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if (CHECK_FAIL(err))
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goto done;
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err = clock_gettime(CLOCK_BOOTTIME, &boot_time_ts);
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if (CHECK_FAIL(err))
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goto done;
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err = bpf_obj_get_info_by_fd(prog_fds[i], &prog_infos[i],
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&info_len);
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load_time = (real_time_ts.tv_sec - boot_time_ts.tv_sec)
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+ (prog_infos[i].load_time / nsec_per_sec);
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if (CHECK(err ||
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prog_infos[i].type != BPF_PROG_TYPE_RAW_TRACEPOINT ||
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info_len != sizeof(struct bpf_prog_info) ||
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(env.jit_enabled && !prog_infos[i].jited_prog_len) ||
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(env.jit_enabled &&
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!memcmp(jited_insns, zeros, sizeof(zeros))) ||
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!prog_infos[i].xlated_prog_len ||
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!memcmp(xlated_insns, zeros, sizeof(zeros)) ||
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load_time < now - 60 || load_time > now + 60 ||
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prog_infos[i].created_by_uid != my_uid ||
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prog_infos[i].nr_map_ids != 1 ||
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*(int *)(long)prog_infos[i].map_ids != map_infos[i].id ||
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strcmp((char *)prog_infos[i].name, expected_prog_name),
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"get-prog-info(fd)",
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"err %d errno %d i %d type %d(%d) info_len %u(%zu) "
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"jit_enabled %d jited_prog_len %u xlated_prog_len %u "
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"jited_prog %d xlated_prog %d load_time %lu(%lu) "
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"uid %u(%u) nr_map_ids %u(%u) map_id %u(%u) "
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"name %s(%s)\n",
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err, errno, i,
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prog_infos[i].type, BPF_PROG_TYPE_SOCKET_FILTER,
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info_len, sizeof(struct bpf_prog_info),
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env.jit_enabled,
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prog_infos[i].jited_prog_len,
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prog_infos[i].xlated_prog_len,
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!!memcmp(jited_insns, zeros, sizeof(zeros)),
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!!memcmp(xlated_insns, zeros, sizeof(zeros)),
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load_time, now,
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prog_infos[i].created_by_uid, my_uid,
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prog_infos[i].nr_map_ids, 1,
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*(int *)(long)prog_infos[i].map_ids, map_infos[i].id,
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prog_infos[i].name, expected_prog_name))
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goto done;
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/* Check getting link info */
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info_len = sizeof(struct bpf_link_info) * 2;
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bzero(&link_infos[i], info_len);
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link_infos[i].raw_tracepoint.tp_name = ptr_to_u64(&tp_name);
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link_infos[i].raw_tracepoint.tp_name_len = sizeof(tp_name);
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err = bpf_obj_get_info_by_fd(bpf_link__fd(links[i]),
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&link_infos[i], &info_len);
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if (CHECK(err ||
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link_infos[i].type != BPF_LINK_TYPE_RAW_TRACEPOINT ||
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link_infos[i].prog_id != prog_infos[i].id ||
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link_infos[i].raw_tracepoint.tp_name != ptr_to_u64(&tp_name) ||
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strcmp(u64_to_ptr(link_infos[i].raw_tracepoint.tp_name),
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"sys_enter") ||
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info_len != sizeof(struct bpf_link_info),
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"get-link-info(fd)",
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"err %d errno %d info_len %u(%zu) type %d(%d) id %d "
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"prog_id %d (%d) tp_name %s(%s)\n",
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err, errno,
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info_len, sizeof(struct bpf_link_info),
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link_infos[i].type, BPF_LINK_TYPE_RAW_TRACEPOINT,
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link_infos[i].id,
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link_infos[i].prog_id, prog_infos[i].id,
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(const char *)u64_to_ptr(link_infos[i].raw_tracepoint.tp_name),
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"sys_enter"))
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goto done;
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}
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/* Check bpf_prog_get_next_id() */
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nr_id_found = 0;
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next_id = 0;
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while (!bpf_prog_get_next_id(next_id, &next_id)) {
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struct bpf_prog_info prog_info = {};
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__u32 saved_map_id;
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int prog_fd;
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info_len = sizeof(prog_info);
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prog_fd = bpf_prog_get_fd_by_id(next_id);
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if (prog_fd < 0 && errno == ENOENT)
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/* The bpf_prog is in the dead row */
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continue;
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if (CHECK(prog_fd < 0, "get-prog-fd(next_id)",
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"prog_fd %d next_id %d errno %d\n",
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prog_fd, next_id, errno))
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break;
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for (i = 0; i < nr_iters; i++)
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if (prog_infos[i].id == next_id)
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break;
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if (i == nr_iters)
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continue;
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nr_id_found++;
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/* Negative test:
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* prog_info.nr_map_ids = 1
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* prog_info.map_ids = NULL
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*/
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prog_info.nr_map_ids = 1;
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err = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &info_len);
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if (CHECK(!err || errno != EFAULT,
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"get-prog-fd-bad-nr-map-ids", "err %d errno %d(%d)",
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err, errno, EFAULT))
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break;
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bzero(&prog_info, sizeof(prog_info));
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info_len = sizeof(prog_info);
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saved_map_id = *(int *)((long)prog_infos[i].map_ids);
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prog_info.map_ids = prog_infos[i].map_ids;
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prog_info.nr_map_ids = 2;
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err = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &info_len);
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prog_infos[i].jited_prog_insns = 0;
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prog_infos[i].xlated_prog_insns = 0;
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CHECK(err || info_len != sizeof(struct bpf_prog_info) ||
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memcmp(&prog_info, &prog_infos[i], info_len) ||
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*(int *)(long)prog_info.map_ids != saved_map_id,
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"get-prog-info(next_id->fd)",
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"err %d errno %d info_len %u(%zu) memcmp %d map_id %u(%u)\n",
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err, errno, info_len, sizeof(struct bpf_prog_info),
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memcmp(&prog_info, &prog_infos[i], info_len),
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*(int *)(long)prog_info.map_ids, saved_map_id);
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close(prog_fd);
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}
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CHECK(nr_id_found != nr_iters,
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"check total prog id found by get_next_id",
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"nr_id_found %u(%u)\n",
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nr_id_found, nr_iters);
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/* Check bpf_map_get_next_id() */
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nr_id_found = 0;
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next_id = 0;
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while (!bpf_map_get_next_id(next_id, &next_id)) {
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struct bpf_map_info map_info = {};
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int map_fd;
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info_len = sizeof(map_info);
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map_fd = bpf_map_get_fd_by_id(next_id);
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if (map_fd < 0 && errno == ENOENT)
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/* The bpf_map is in the dead row */
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continue;
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if (CHECK(map_fd < 0, "get-map-fd(next_id)",
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"map_fd %d next_id %u errno %d\n",
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map_fd, next_id, errno))
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break;
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for (i = 0; i < nr_iters; i++)
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if (map_infos[i].id == next_id)
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break;
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if (i == nr_iters)
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continue;
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nr_id_found++;
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err = bpf_map_lookup_elem(map_fd, &array_key, &array_value);
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if (CHECK_FAIL(err))
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goto done;
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err = bpf_obj_get_info_by_fd(map_fd, &map_info, &info_len);
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CHECK(err || info_len != sizeof(struct bpf_map_info) ||
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memcmp(&map_info, &map_infos[i], info_len) ||
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array_value != array_magic_value,
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"check get-map-info(next_id->fd)",
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"err %d errno %d info_len %u(%zu) memcmp %d array_value %llu(%llu)\n",
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err, errno, info_len, sizeof(struct bpf_map_info),
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memcmp(&map_info, &map_infos[i], info_len),
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array_value, array_magic_value);
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close(map_fd);
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}
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CHECK(nr_id_found != nr_iters,
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"check total map id found by get_next_id",
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"nr_id_found %u(%u)\n",
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nr_id_found, nr_iters);
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/* Check bpf_link_get_next_id() */
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nr_id_found = 0;
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next_id = 0;
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while (!bpf_link_get_next_id(next_id, &next_id)) {
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struct bpf_link_info link_info;
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int link_fd, cmp_res;
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info_len = sizeof(link_info);
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memset(&link_info, 0, info_len);
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link_fd = bpf_link_get_fd_by_id(next_id);
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if (link_fd < 0 && errno == ENOENT)
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/* The bpf_link is in the dead row */
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continue;
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if (CHECK(link_fd < 0, "get-link-fd(next_id)",
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"link_fd %d next_id %u errno %d\n",
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link_fd, next_id, errno))
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break;
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for (i = 0; i < nr_iters; i++)
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if (link_infos[i].id == next_id)
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break;
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if (i == nr_iters)
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continue;
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nr_id_found++;
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err = bpf_obj_get_info_by_fd(link_fd, &link_info, &info_len);
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cmp_res = memcmp(&link_info, &link_infos[i],
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offsetof(struct bpf_link_info, raw_tracepoint));
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CHECK(err || info_len != sizeof(link_info) || cmp_res,
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"check get-link-info(next_id->fd)",
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"err %d errno %d info_len %u(%zu) memcmp %d\n",
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err, errno, info_len, sizeof(struct bpf_link_info),
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cmp_res);
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close(link_fd);
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}
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CHECK(nr_id_found != nr_iters,
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"check total link id found by get_next_id",
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"nr_id_found %u(%u)\n", nr_id_found, nr_iters);
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done:
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for (i = 0; i < nr_iters; i++) {
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bpf_link__destroy(links[i]);
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bpf_object__close(objs[i]);
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}
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}
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