1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2014
4 * Copyright (c) Linux Test Project, 2013-2023
5 */
6
7 /*\
8 * [Description]
9 *
10 * Testcase copied from sendfile02.c to test the basic functionality of
11 * the sendfile() system call on large file. There is a kernel bug which
12 * introduced by commit 8f9c0119d7ba9 and fixed by commit 5d73320a96fcc.
13 *
14 * Only supports 64bit systems.
15 *
16 * [Algorithm]
17 *
18 * 1. Call sendfile() with offset at 0.
19 * 2. Call sendfile() with offset at 3GB.
20 */
21
22 #include <inttypes.h>
23 #include <sys/sendfile.h>
24 #include "tst_test.h"
25
26 #define ONE_GB (INT64_C(1) << 30)
27 #define IN_FILE "in_file"
28 #define OUT_FILE "out_file"
29
30 static struct test_case_t {
31 char *desc;
32 off_t offset;
33 int64_t count;
34 int64_t exp_retval;
35 int64_t exp_updated_offset;
36 } tc[] = {
37 { "offset at 0", 0, ONE_GB, ONE_GB, ONE_GB },
38 { "offset at 3GB", 3 * ONE_GB, ONE_GB, ONE_GB, 4 * ONE_GB }
39 };
40
setup(void)41 static void setup(void)
42 {
43 int i, fd;
44
45 if (!tst_fs_has_free(".", 5, TST_GB))
46 tst_brk(TCONF, "Test on large file needs 5G free space");
47
48 fd = SAFE_CREAT(IN_FILE, 00700);
49 for (i = 1; i <= (4 * 1024); ++i) {
50 SAFE_LSEEK(fd, 1024 * 1024 - 1, SEEK_CUR);
51 SAFE_WRITE(SAFE_WRITE_ALL, fd, "C", 1);
52 }
53 SAFE_CLOSE(fd);
54
55 fd = SAFE_CREAT(OUT_FILE, 00700);
56 SAFE_CLOSE(fd);
57 }
58
run(unsigned int i)59 static void run(unsigned int i)
60 {
61 int in_fd = SAFE_OPEN(IN_FILE, O_RDONLY);
62 int out_fd = SAFE_OPEN(OUT_FILE, O_WRONLY);
63 off_t offset = tc[i].offset;
64
65 off_t before_pos, after_pos;
66 before_pos = SAFE_LSEEK(in_fd, 0, SEEK_CUR);
67
68 TEST(sendfile(out_fd, in_fd, &offset, tc[i].count));
69 after_pos = SAFE_LSEEK(in_fd, 0, SEEK_CUR);
70
71 if (TST_RET != tc[i].exp_retval)
72 tst_res(TFAIL, "sendfile() failed to return expected value, "
73 "expected: %" PRId64 ", got: %ld",
74 tc[i].exp_retval, TST_RET);
75 else if (offset != tc[i].exp_updated_offset)
76 tst_res(TFAIL, "sendfile() failed to update OFFSET parameter to "
77 "expected value, expected: %" PRId64 ", got: %" PRId64,
78 tc[i].exp_updated_offset, (int64_t)(offset));
79 else if (before_pos != after_pos)
80 tst_res(TFAIL, "sendfile() updated the file position of in_fd "
81 "unexpectedly, expected file position: %" PRId64
82 ", actual file position %" PRId64,
83 (int64_t)(before_pos), (int64_t)(after_pos));
84 else
85 tst_res(TPASS, "sendfile() with %s", tc[i].desc);
86
87 SAFE_CLOSE(in_fd);
88 SAFE_CLOSE(out_fd);
89 }
90
91 static struct tst_test test = {
92 .needs_tmpdir = 1,
93 .setup = setup,
94 .test = run,
95 .tcnt = ARRAY_SIZE(tc),
96 .max_runtime = 120,
97 .skip_in_compat = 1,
98 .tags = (const struct tst_tag[]) {
99 {"linux-git", "5d73320a96fcc"},
100 {}
101 }
102 };
103