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daa9bdb6 | 1 | /* Common function for preadv2 and pwritev2 tests. |
2b778ceb | 2 | Copyright (C) 2017-2021 Free Software Foundation, Inc. |
daa9bdb6 AZ |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
daa9bdb6 | 18 | |
94070f86 | 19 | #include <limits.h> |
daa9bdb6 AZ |
20 | #include <support/check.h> |
21 | ||
492cbbed ST |
22 | #ifndef RWF_HIPRI |
23 | # define RWF_HIPRI 0 | |
24 | #endif | |
25 | #ifndef RWF_DSYNC | |
26 | # define RWF_DSYNC 0 | |
27 | #endif | |
28 | #ifndef RWF_SYNC | |
29 | # define RWF_SYNC 0 | |
30 | #endif | |
31 | #ifndef RWF_NOWAIT | |
32 | # define RWF_NOWAIT 0 | |
33 | #endif | |
f2652643 L |
34 | #ifndef RWF_APPEND |
35 | # define RWF_APPEND 0 | |
36 | #endif | |
37 | #define RWF_SUPPORTED (RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT \ | |
38 | | RWF_APPEND) | |
7a16bdbb | 39 | |
18ad0de6 AZ |
40 | /* Generic uio_lim.h does not define IOV_MAX. */ |
41 | #ifndef IOV_MAX | |
42 | # define IOV_MAX 1024 | |
43 | #endif | |
44 | ||
7a16bdbb AZ |
45 | static void |
46 | do_test_with_invalid_fd (void) | |
47 | { | |
48 | char buf[256]; | |
49 | struct iovec iov = { buf, sizeof buf }; | |
50 | ||
51 | /* Check with flag being 0 to use the fallback code which calls pwritev | |
52 | or writev. */ | |
53 | TEST_VERIFY (preadv2 (-1, &iov, 1, -1, 0) == -1); | |
54 | TEST_COMPARE (errno, EBADF); | |
55 | TEST_VERIFY (pwritev2 (-1, &iov, 1, -1, 0) == -1); | |
56 | TEST_COMPARE (errno, EBADF); | |
57 | ||
58 | /* Same tests as before but with flags being different than 0. Since | |
59 | there is no emulation for any flag value, fallback code returns | |
60 | ENOTSUP. This is different running on a kernel with preadv2/pwritev2 | |
61 | support, where EBADF is returned). */ | |
62 | TEST_VERIFY (preadv2 (-1, &iov, 1, 0, RWF_HIPRI) == -1); | |
63 | TEST_VERIFY (errno == EBADF || errno == ENOTSUP); | |
64 | TEST_VERIFY (pwritev2 (-1, &iov, 1, 0, RWF_HIPRI) == -1); | |
65 | TEST_VERIFY (errno == EBADF || errno == ENOTSUP); | |
66 | } | |
67 | ||
68 | static void | |
69 | do_test_with_invalid_iov (void) | |
70 | { | |
71 | { | |
72 | char buf[256]; | |
73 | struct iovec iov; | |
74 | ||
75 | iov.iov_base = buf; | |
76 | iov.iov_len = (size_t)SSIZE_MAX + 1; | |
77 | ||
78 | TEST_VERIFY (preadv2 (temp_fd, &iov, 1, 0, 0) == -1); | |
79 | TEST_COMPARE (errno, EINVAL); | |
80 | TEST_VERIFY (pwritev2 (temp_fd, &iov, 1, 0, 0) == -1); | |
81 | TEST_COMPARE (errno, EINVAL); | |
82 | ||
83 | /* Same as for invalid file descriptor tests, emulation fallback | |
84 | first checks for flag value and return ENOTSUP. */ | |
85 | TEST_VERIFY (preadv2 (temp_fd, &iov, 1, 0, RWF_HIPRI) == -1); | |
86 | TEST_VERIFY (errno == EINVAL || errno == ENOTSUP); | |
87 | TEST_VERIFY (pwritev2 (temp_fd, &iov, 1, 0, RWF_HIPRI) == -1); | |
88 | TEST_VERIFY (errno == EINVAL || errno == ENOTSUP); | |
89 | } | |
90 | ||
91 | { | |
92 | /* An invalid iovec buffer should trigger an invalid memory access | |
93 | or an error (Linux for instance returns EFAULT). */ | |
94 | struct iovec iov[IOV_MAX+1] = { 0 }; | |
95 | ||
96 | TEST_VERIFY (preadv2 (temp_fd, iov, IOV_MAX + 1, 0, RWF_HIPRI) == -1); | |
97 | TEST_VERIFY (errno == EINVAL || errno == ENOTSUP); | |
98 | TEST_VERIFY (pwritev2 (temp_fd, iov, IOV_MAX + 1, 0, RWF_HIPRI) == -1); | |
99 | TEST_VERIFY (errno == EINVAL || errno == ENOTSUP); | |
100 | } | |
101 | } | |
102 | ||
103 | static void | |
104 | do_test_with_invalid_flags (void) | |
105 | { | |
94070f86 | 106 | /* Set the next bit from the mask of all supported flags. */ |
492cbbed | 107 | int invalid_flag = RWF_SUPPORTED != 0 ? __builtin_clz (RWF_SUPPORTED) : 2; |
94070f86 | 108 | invalid_flag = 0x1 << ((sizeof (int) * CHAR_BIT) - invalid_flag); |
daa9bdb6 AZ |
109 | |
110 | char buf[32]; | |
111 | const struct iovec vec = { .iov_base = buf, .iov_len = sizeof (buf) }; | |
112 | if (preadv2 (temp_fd, &vec, 1, 0, invalid_flag) != -1) | |
113 | FAIL_EXIT1 ("preadv2 did not fail with an invalid flag"); | |
114 | if (errno != ENOTSUP) | |
115 | FAIL_EXIT1 ("preadv2 failure did not set errno to ENOTSUP (%d)", errno); | |
116 | ||
117 | /* This might fail for compat syscall (32 bits running on 64 bits kernel) | |
118 | due a kernel issue. */ | |
119 | if (pwritev2 (temp_fd, &vec, 1, 0, invalid_flag) != -1) | |
120 | FAIL_EXIT1 ("pwritev2 did not fail with an invalid flag"); | |
121 | if (errno != ENOTSUP) | |
122 | FAIL_EXIT1 ("pwritev2 failure did not set errno to ENOTSUP (%d)", errno); | |
123 | } |