1 | /* Basic test of statx system call. |
2 | Copyright (C) 2018-2022 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 <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 (path: "/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 (base: "tst-statx-" , filename: &path); |
123 | TEST_VERIFY_EXIT (fd >= 0); |
124 | support_write_file_string (path, contents: "abc" ); |
125 | |
126 | both_implementations_tests (impl: &statx, path, fd); |
127 | both_implementations_tests (impl: &statx_generic, path, fd); |
128 | |
129 | if (kernel_supports_statx ()) |
130 | { |
131 | puts (s: "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 (s: "info: kernel does not support statx" ); |
147 | non_kernel_tests (impl: &statx, fd); |
148 | } |
149 | non_kernel_tests (impl: &statx_generic, fd); |
150 | |
151 | xclose (fd); |
152 | free (ptr: path); |
153 | |
154 | return 0; |
155 | } |
156 | |
157 | #include <support/test-driver.c> |
158 | |