1 | /* Common function for preadv2 and pwritev2 tests. |
2 | Copyright (C) 2017-2022 Free Software Foundation, Inc. |
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 |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <limits.h> |
20 | #include <support/check.h> |
21 | |
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 |
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) |
39 | |
40 | /* Generic uio_lim.h does not define IOV_MAX. */ |
41 | #ifndef IOV_MAX |
42 | # define IOV_MAX 1024 |
43 | #endif |
44 | |
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 | { |
106 | /* Set the next bit from the mask of all supported flags. */ |
107 | int invalid_flag = RWF_SUPPORTED != 0 ? __builtin_clz (RWF_SUPPORTED) : 2; |
108 | invalid_flag = 0x1 << ((sizeof (int) * CHAR_BIT) - invalid_flag); |
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 | } |
124 | |