1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2001
4 * 07/2001 Ported by Wayne Boyer
5 * 08/2002 Make it use a socket so it works with 2.5 kernel
6 * Copyright (c) 2021 Xie Ziyao <xieziyao@huawei.com>
7 */
8
9 /*\
10 * [Description]
11 *
12 * Test the basic functionality of the sendfile() system call:
13 *
14 * 1. Call sendfile() with offset = 0.
15 * 2. Call sendfile() with offset in the middle of the file.
16 */
17
18 #include <stdio.h>
19 #include <inttypes.h>
20 #include <sys/sendfile.h>
21
22 #include "tst_test.h"
23
24 #define IN_FILE "in_file"
25 #define OUT_FILE "out_file"
26
27 #define OFFSET_DESC(x) .desc = "with offset = "#x, .offset = x
28
29 struct test_case_t {
30 char *desc;
31 off_t offset;
32 int64_t count;
33 int64_t exp_retval;
34 int64_t exp_updated_offset;
35 } tc[] = {
36 { OFFSET_DESC(0), 26, 26, 26 },
37 { OFFSET_DESC(2), 24, 24, 26 },
38 };
39
setup(void)40 static void setup(void)
41 {
42 int fd;
43 char buf[27];
44
45 fd = SAFE_CREAT(IN_FILE, 00700);
46 sprintf(buf, "abcdefghijklmnopqrstuvwxyz");
47 SAFE_WRITE(SAFE_WRITE_ALL, fd, buf, strlen(buf));
48 SAFE_CLOSE(fd);
49
50 fd = SAFE_CREAT(OUT_FILE, 00700);
51 SAFE_CLOSE(fd);
52 }
53
run(unsigned int i)54 static void run(unsigned int i)
55 {
56 int in_fd = SAFE_OPEN(IN_FILE, O_RDONLY);
57 int out_fd = SAFE_OPEN(OUT_FILE, O_WRONLY);
58 off_t offset = tc[i].offset;
59 off_t before_pos, after_pos;
60
61 before_pos = SAFE_LSEEK(in_fd, 0, SEEK_CUR);
62
63 TEST(sendfile(out_fd, in_fd, &offset, tc[i].count));
64 after_pos = SAFE_LSEEK(in_fd, 0, SEEK_CUR);
65
66 if (tc[i].exp_retval != TST_RET)
67 tst_res(TFAIL, "sendfile() failed to return expected value, "
68 "expected: %" PRId64 ", got: %ld",
69 tc[i].exp_retval, TST_RET);
70 else if (offset != tc[i].exp_updated_offset)
71 tst_res(TFAIL, "sendfile() failed to update OFFSET parameter to "
72 "expected value, expected: %" PRId64 ", got: %" PRId64,
73 tc[i].exp_updated_offset, (int64_t)(offset));
74 else if (before_pos != after_pos)
75 tst_res(TFAIL, "sendfile() updated the file position of in_fd "
76 "unexpectedly, expected file position: %" PRId64
77 ", actual file position %" PRId64,
78 (int64_t)(before_pos), (int64_t)(after_pos));
79 else
80 tst_res(TPASS, "sendfile() with %s", tc[i].desc);
81
82 SAFE_CLOSE(in_fd);
83 SAFE_CLOSE(out_fd);
84 }
85
86 static struct tst_test test = {
87 .needs_tmpdir = 1,
88 .setup = setup,
89 .test = run,
90 .tcnt = ARRAY_SIZE(tc),
91 };
92