1 /*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <gtest/gtest.h>
18
19 #include <sys/statvfs.h>
20
21 #include <sys/types.h>
22 #include <sys/stat.h>
23 #include <fcntl.h>
24
25 #include <string>
26
Check(StatVfsT & sb)27 template <typename StatVfsT> void Check(StatVfsT& sb) {
28 #if defined(__x86_64__)
29 // On x86_64 based 16kb page size targets, the page size in userspace is simulated to 16kb but
30 // the underlying filesystem block size would remain unchanged, i.e., 4kb.
31 // For more info:
32 // https://source.android.com/docs/core/architecture/16kb-page-size/getting-started-cf-x86-64-pgagnostic
33 EXPECT_EQ(4096, static_cast<int>(sb.f_bsize));
34 #else
35 EXPECT_EQ(getpagesize(), static_cast<int>(sb.f_bsize));
36 #endif
37 EXPECT_EQ(0U, sb.f_bfree);
38 EXPECT_EQ(0U, sb.f_ffree);
39 EXPECT_EQ(255U, sb.f_namemax);
40
41 // Linux 6.7 requires that all filesystems have a non-zero fsid.
42 if (sb.f_fsid != 0U) {
43 // fs/libfs.c reuses the filesystem's device number.
44 struct stat proc_sb;
45 ASSERT_EQ(0, stat("/proc", &proc_sb));
46 EXPECT_EQ(proc_sb.st_dev, sb.f_fsid);
47 } else {
48 // Prior to that, the fsid for /proc was just 0.
49 EXPECT_EQ(0U, sb.f_fsid);
50 }
51
52 // The kernel sets a private bit to indicate that f_flags is valid.
53 // This flag is not supposed to be exposed to libc clients.
54 static const uint32_t ST_VALID = 0x0020;
55 EXPECT_TRUE((sb.f_flag & ST_VALID) == 0) << sb.f_flag;
56 }
57
TEST(sys_statvfs,statvfs)58 TEST(sys_statvfs, statvfs) {
59 struct statvfs sb;
60 ASSERT_EQ(0, statvfs("/proc", &sb));
61 Check(sb);
62 }
63
TEST(sys_statvfs,statvfs64_smoke)64 TEST(sys_statvfs, statvfs64_smoke) {
65 struct statvfs64 sb;
66 ASSERT_EQ(0, statvfs64("/proc", &sb));
67 Check(sb);
68 }
69
TEST(sys_statvfs,fstatvfs)70 TEST(sys_statvfs, fstatvfs) {
71 struct statvfs sb;
72 int fd = open("/proc", O_RDONLY);
73 ASSERT_EQ(0, fstatvfs(fd, &sb));
74 close(fd);
75 Check(sb);
76 }
77
TEST(sys_statvfs,fstatvfs64_smoke)78 TEST(sys_statvfs, fstatvfs64_smoke) {
79 struct statvfs64 sb;
80 int fd = open("/proc", O_RDONLY);
81 ASSERT_EQ(0, fstatvfs64(fd, &sb));
82 close(fd);
83 Check(sb);
84 }
85