tools/testing/selftests/bpf/prog_tests/bpf_obj_id.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/prog_tests/bpf_obj_id.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/prog_tests/bpf_obj_id.c
Extension
.c
Size
9508 bytes
Lines
288
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

if (!ASSERT_OK(err, "bpf_program__attach")) {
			links[i] = NULL;
			goto done;
		}

		/* Check getting map info */
		info_len = sizeof(struct bpf_map_info) * 2;
		bzero(&map_infos[i], info_len);
		err = bpf_map_get_info_by_fd(map_fds[i], &map_infos[i],
					     &info_len);
		if (!ASSERT_OK(err, "bpf_map_get_info_by_fd") ||
				!ASSERT_EQ(map_infos[i].type, BPF_MAP_TYPE_ARRAY, "map_type") ||
				!ASSERT_EQ(map_infos[i].key_size, sizeof(__u32), "key_size") ||
				!ASSERT_EQ(map_infos[i].value_size, sizeof(__u64), "value_size") ||
				!ASSERT_EQ(map_infos[i].max_entries, 1, "max_entries") ||
				!ASSERT_EQ(map_infos[i].map_flags, 0, "map_flags") ||
				!ASSERT_EQ(info_len, sizeof(struct bpf_map_info), "map_info_len") ||
				!ASSERT_STREQ((char *)map_infos[i].name, expected_map_name, "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);
		if (!ASSERT_OK(err, "clock_gettime"))
			goto done;

		err = clock_gettime(CLOCK_BOOTTIME, &boot_time_ts);
		if (!ASSERT_OK(err, "clock_gettime"))
			goto done;

		err = bpf_prog_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 (!ASSERT_OK(err, "bpf_prog_get_info_by_fd") ||
				!ASSERT_EQ(prog_infos[i].type, BPF_PROG_TYPE_RAW_TRACEPOINT, "prog_type") ||
				!ASSERT_EQ(info_len, sizeof(struct bpf_prog_info), "prog_info_len") ||
				!ASSERT_FALSE((env.jit_enabled && !prog_infos[i].jited_prog_len), "jited_prog_len") ||
				!ASSERT_FALSE((env.jit_enabled && !memcmp(jited_insns, zeros, sizeof(zeros))),
					"jited_insns") ||
				!ASSERT_NEQ(prog_infos[i].xlated_prog_len, 0, "xlated_prog_len") ||
				!ASSERT_NEQ(memcmp(xlated_insns, zeros, sizeof(zeros)), 0, "xlated_insns") ||
				!ASSERT_GE(load_time, (now - 60), "load_time") ||
				!ASSERT_LE(load_time, (now + 60), "load_time") ||
				!ASSERT_EQ(prog_infos[i].created_by_uid, my_uid, "created_by_uid") ||
				!ASSERT_EQ(prog_infos[i].nr_map_ids, 1, "nr_map_ids") ||
				!ASSERT_EQ(*(int *)(long)prog_infos[i].map_ids, map_infos[i].id, "map_ids") ||
				!ASSERT_STREQ((char *)prog_infos[i].name, expected_prog_name, "prog_name"))
			goto done;

		/* Check getting link info */
		info_len = sizeof(struct bpf_link_info) * 2;
		bzero(&link_infos[i], info_len);
		link_infos[i].raw_tracepoint.tp_name = ptr_to_u64(&tp_name);
		link_infos[i].raw_tracepoint.tp_name_len = sizeof(tp_name);
		err = bpf_link_get_info_by_fd(bpf_link__fd(links[i]),
					      &link_infos[i], &info_len);
		if (!ASSERT_OK(err, "bpf_link_get_info_by_fd") ||
				!ASSERT_EQ(link_infos[i].type, BPF_LINK_TYPE_RAW_TRACEPOINT, "link_type") ||
				!ASSERT_EQ(link_infos[i].prog_id, prog_infos[i].id, "prog_id") ||
				!ASSERT_EQ(link_infos[i].raw_tracepoint.tp_name, ptr_to_u64(&tp_name), "&tp_name") ||
				!ASSERT_STREQ(u64_to_ptr(link_infos[i].raw_tracepoint.tp_name), "sys_enter", "tp_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, cmp_res;

		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;

Annotation

Implementation Notes