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fd70af45 FW |
1 | /* Basic test of statx system call. |
2 | Copyright (C) 2018 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 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <errno.h> | |
20 | #include <stdbool.h> | |
21 | #include <stdint.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <support/check.h> | |
25 | #include <support/support.h> | |
26 | #include <support/temp_file.h> | |
27 | #include <support/xunistd.h> | |
28 | #include <sys/stat.h> | |
29 | #include <sys/syscall.h> | |
30 | #include <sys/sysmacros.h> | |
31 | #include <unistd.h> | |
32 | ||
33 | /* Ensure that the types have the kernel-expected layout. */ | |
34 | _Static_assert (sizeof (struct statx_timestamp) == 16, "statx_timestamp size"); | |
35 | _Static_assert (sizeof (struct statx) == 256, "statx size"); | |
36 | _Static_assert (offsetof (struct statx, stx_nlink) == 16, "statx nlink"); | |
37 | _Static_assert (offsetof (struct statx, stx_ino) == 32, "statx ino"); | |
38 | _Static_assert (offsetof (struct statx, stx_atime) == 64, "statx atime"); | |
39 | _Static_assert (offsetof (struct statx, stx_rdev_major) == 128, "statx rdev"); | |
40 | _Static_assert (offsetof (struct statx, __statx_pad2) == 144, "statx pad2"); | |
41 | ||
42 | #include "statx_generic.c" | |
43 | ||
44 | typedef int (*statx_function) (int, const char *, int, unsigned int, | |
45 | struct statx *); | |
46 | ||
47 | /* Return true if we have a real implementation of statx. */ | |
48 | static bool | |
49 | kernel_supports_statx (void) | |
50 | { | |
51 | #ifdef __NR_statx | |
52 | struct statx buf; | |
53 | return syscall (__NR_statx, 0, "", AT_EMPTY_PATH, 0, &buf) == 0 | |
54 | || errno != ENOSYS; | |
55 | #else | |
56 | return false; | |
57 | #endif | |
58 | } | |
59 | ||
60 | /* Tests which apply to both implementations. */ | |
61 | static void | |
62 | both_implementations_tests (statx_function impl, const char *path, int fd) | |
63 | { | |
64 | uint64_t ino; | |
65 | { | |
66 | struct statx buf = { 0, }; | |
67 | TEST_COMPARE (statx (fd, "", AT_EMPTY_PATH, STATX_BASIC_STATS, &buf), 0); | |
68 | TEST_COMPARE (buf.stx_size, 3); | |
69 | ino = buf.stx_ino; | |
70 | } | |
71 | { | |
72 | struct statx buf = { 0, }; | |
73 | TEST_COMPARE (statx (AT_FDCWD, path, 0, STATX_BASIC_STATS, &buf), 0); | |
74 | TEST_COMPARE (buf.stx_size, 3); | |
75 | TEST_COMPARE (buf.stx_ino, ino); | |
76 | } | |
77 | { | |
78 | struct statx stx = { 0, }; | |
79 | TEST_COMPARE (statx (fd, "", AT_EMPTY_PATH, STATX_BASIC_STATS, &stx), 0); | |
80 | struct stat64 st; | |
81 | xfstat (fd, &st); | |
82 | TEST_COMPARE (stx.stx_mode, st.st_mode); | |
83 | TEST_COMPARE (stx.stx_dev_major, major (st.st_dev)); | |
84 | TEST_COMPARE (stx.stx_dev_minor, minor (st.st_dev)); | |
85 | } | |
86 | { | |
87 | struct statx stx = { 0, }; | |
88 | TEST_COMPARE (statx (AT_FDCWD, "/dev/null", 0, STATX_BASIC_STATS, &stx), | |
89 | 0); | |
90 | struct stat64 st; | |
91 | xstat ("/dev/null", &st); | |
92 | TEST_COMPARE (stx.stx_mode, st.st_mode); | |
93 | TEST_COMPARE (stx.stx_dev_major, major (st.st_dev)); | |
94 | TEST_COMPARE (stx.stx_dev_minor, minor (st.st_dev)); | |
95 | TEST_COMPARE (stx.stx_rdev_major, major (st.st_rdev)); | |
96 | TEST_COMPARE (stx.stx_rdev_minor, minor (st.st_rdev)); | |
97 | } | |
98 | } | |
99 | ||
100 | /* Tests which apply only to the non-kernel (generic) | |
101 | implementation. */ | |
102 | static void | |
103 | non_kernel_tests (statx_function impl, int fd) | |
104 | { | |
105 | /* The non-kernel implementation must always fail for explicit sync | |
106 | flags. */ | |
107 | struct statx buf; | |
108 | errno = 0; | |
109 | TEST_COMPARE (impl (fd, "", AT_EMPTY_PATH | AT_STATX_FORCE_SYNC, | |
110 | STATX_BASIC_STATS, &buf), -1); | |
111 | TEST_COMPARE (errno, EINVAL); | |
112 | errno = 0; | |
113 | TEST_COMPARE (impl (fd, "", AT_EMPTY_PATH | AT_STATX_DONT_SYNC, | |
114 | STATX_BASIC_STATS, &buf), -1); | |
115 | TEST_COMPARE (errno, EINVAL); | |
116 | } | |
117 | ||
118 | static int | |
119 | do_test (void) | |
120 | { | |
121 | char *path; | |
122 | int fd = create_temp_file ("tst-statx-", &path); | |
123 | TEST_VERIFY_EXIT (fd >= 0); | |
124 | support_write_file_string (path, "abc"); | |
125 | ||
126 | both_implementations_tests (&statx, path, fd); | |
127 | both_implementations_tests (&statx_generic, path, fd); | |
128 | ||
129 | if (kernel_supports_statx ()) | |
130 | { | |
131 | puts ("info: kernel supports statx"); | |
132 | struct statx buf; | |
133 | buf.stx_size = 0; | |
134 | TEST_COMPARE (statx (fd, "", AT_EMPTY_PATH | AT_STATX_FORCE_SYNC, | |
135 | STATX_BASIC_STATS, &buf), | |
136 | 0); | |
137 | TEST_COMPARE (buf.stx_size, 3); | |
138 | buf.stx_size = 0; | |
139 | TEST_COMPARE (statx (fd, "", AT_EMPTY_PATH | AT_STATX_DONT_SYNC, | |
140 | STATX_BASIC_STATS, &buf), | |
141 | 0); | |
142 | TEST_COMPARE (buf.stx_size, 3); | |
143 | } | |
144 | else | |
145 | { | |
146 | puts ("info: kernel does not support statx"); | |
147 | non_kernel_tests (&statx, fd); | |
148 | } | |
149 | non_kernel_tests (&statx_generic, fd); | |
150 | ||
151 | xclose (fd); | |
152 | free (path); | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
157 | #include <support/test-driver.c> |