1 /*
2 * Copyright (c) International Business Machines Corp., 2001
3 * 07/2001 Ported by Wayne Boyer
4 * Copyright (c) 2017 Fujitsu Ltd.
5 * 04/2017 Modified by Jinhui Huang
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21 /*
22 * DESCRIPTION
23 * test 1:
24 * Read with an invalid file descriptor, and expect an EBADF.
25 *
26 * test 2:
27 * The parameter passed to read is a directory, check if the errno is
28 * set to EISDIR.
29 *
30 * test 3:
31 * Buf is outside the accessible address space, expect an EFAULT.
32 *
33 * test 4:
34 * The file was opened with the O_DIRECT flag, and transfer sizes was not
35 * multiples of the logical block size of the file system, expect an
36 * EINVAL.
37 *
38 * test 5:
39 * The file was opened with the O_DIRECT flag, and the alignment of the
40 * user buffer was not multiples of the logical block size of the file
41 * system, expect an EINVAL.
42 */
43
44 #define _GNU_SOURCE
45
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <errno.h>
49 #include "tst_test.h"
50
51 static int badfd = -1;
52 static int fd2, fd3, fd4 = -1;
53 static char buf[BUFSIZ];
54 static void *bufaddr = buf;
55 static void *outside_buf = (void *)-1;
56 static void *addr4;
57 static void *addr5;
58 static long fs_type;
59
60 static struct tcase {
61 int *fd;
62 void **buf;
63 size_t count;
64 int exp_error;
65 } tcases[] = {
66 {&badfd, &bufaddr, 1, EBADF},
67 {&fd2, &bufaddr, 1, EISDIR},
68 #ifndef UCLINUX
69 {&fd3, &outside_buf, 1, EFAULT},
70 #endif
71 {&fd4, &addr4, 1, EINVAL},
72 {&fd4, &addr5, 4096, EINVAL},
73 };
74
verify_read(unsigned int n)75 static void verify_read(unsigned int n)
76 {
77 struct tcase *tc = &tcases[n];
78
79 if (tc->fd == &fd4 && *tc->fd == -1) {
80 tst_res(TCONF, "O_DIRECT not supported on %s filesystem",
81 tst_fs_type_name(fs_type));
82 return;
83 }
84
85 TEST(read(*tc->fd, *tc->buf, tc->count));
86
87 if (*tc->fd == fd4 && TEST_RETURN >= 0) {
88 tst_res(TPASS,
89 "O_DIRECT unaligned reads fallbacks to buffered I/O");
90 return;
91 }
92
93 if (TEST_RETURN != -1) {
94 tst_res(TFAIL, "read() succeeded unexpectedly");
95 return;
96 }
97
98 if (TEST_ERRNO == tc->exp_error) {
99 tst_res(TPASS | TTERRNO, "read() failed as expected");
100 } else {
101 tst_res(TFAIL | TTERRNO, "read() failed unexpectedly, "
102 "expected %s", tst_strerrno(tc->exp_error));
103 }
104 }
105
setup(void)106 static void setup(void)
107 {
108 fd2 = SAFE_OPEN(".", O_DIRECTORY);
109
110 SAFE_FILE_PRINTF("test_file", "A");
111
112 fd3 = SAFE_OPEN("test_file", O_RDWR);
113
114 #if !defined(UCLINUX)
115 outside_buf = SAFE_MMAP(0, 1, PROT_NONE,
116 MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
117 #endif
118
119 addr4 = SAFE_MEMALIGN(getpagesize(), (4096 * 10));
120 addr5 = addr4 + 1;
121
122 fs_type = tst_fs_type(".");
123 if (fs_type != TST_TMPFS_MAGIC)
124 fd4 = SAFE_OPEN("test_file", O_RDWR | O_DIRECT);
125 }
126
cleanup(void)127 static void cleanup(void)
128 {
129 free(addr4);
130
131 if (fd4 > 0)
132 SAFE_CLOSE(fd4);
133
134 if (fd3 > 0)
135 SAFE_CLOSE(fd3);
136
137 if (fd2 > 0)
138 SAFE_CLOSE(fd2);
139 }
140
141 static struct tst_test test = {
142 .tcnt = ARRAY_SIZE(tcases),
143 .test = verify_read,
144 .setup = setup,
145 .cleanup = cleanup,
146 .needs_tmpdir = 1,
147 };
148