1 // Copyright (C) 2019 The Android Open Source Project
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include <sys/mount.h>
16 #include <sys/utsname.h>
17
18 #include <android-base/file.h>
19 #include <android-base/properties.h>
20 #include <android-base/strings.h>
21 #include <fstab/fstab.h>
22 #include <gmock/gmock.h>
23 #include <gtest/gtest.h>
24 #include <libdm/dm.h>
25
26 using testing::Contains;
27 using testing::Not;
28
GetVsrLevel()29 static int GetVsrLevel() {
30 return android::base::GetIntProperty("ro.vendor.api_level", -1);
31 }
32
TEST(fs,ErofsSupported)33 TEST(fs, ErofsSupported) {
34 // T-launch GKI kernels and higher must support EROFS.
35 if (GetVsrLevel() < __ANDROID_API_T__) {
36 GTEST_SKIP();
37 }
38
39 struct utsname uts;
40 ASSERT_EQ(uname(&uts), 0);
41
42 unsigned int major, minor;
43 ASSERT_EQ(sscanf(uts.release, "%u.%u", &major, &minor), 2);
44
45 // EROFS support only required in 5.10+
46 if (major < 5 || (major == 5 && minor < 10)) {
47 GTEST_SKIP();
48 }
49
50 std::string fs;
51 ASSERT_TRUE(android::base::ReadFileToString("/proc/filesystems", &fs));
52 EXPECT_THAT(fs, ::testing::HasSubstr("\terofs\n"));
53
54 ASSERT_EQ(access("/sys/fs/erofs", F_OK), 0);
55 }
56
TEST(fs,PartitionTypes)57 TEST(fs, PartitionTypes) {
58 // Requirements only apply to Android 13+, 5.10+ devices.
59 int vsr_level = GetVsrLevel();
60 if (vsr_level < __ANDROID_API_T__) {
61 GTEST_SKIP();
62 }
63
64 struct utsname uts;
65 ASSERT_EQ(uname(&uts), 0);
66
67 unsigned int major, minor;
68 ASSERT_EQ(sscanf(uts.release, "%u.%u", &major, &minor), 2);
69 if (major < 5 || (major == 5 && minor < 10)) {
70 GTEST_SKIP();
71 }
72
73 android::fs_mgr::Fstab fstab;
74 ASSERT_TRUE(android::fs_mgr::ReadFstabFromFile("/proc/mounts", &fstab));
75
76 auto& dm = android::dm::DeviceMapper::Instance();
77
78 std::string super_bdev, userdata_bdev;
79 ASSERT_TRUE(android::base::Readlink("/dev/block/by-name/super", &super_bdev));
80 ASSERT_TRUE(android::base::Readlink("/dev/block/by-name/userdata", &userdata_bdev));
81
82 std::vector<std::string> must_be_f2fs = {"/data"};
83 if (vsr_level >= __ANDROID_API_U__) {
84 must_be_f2fs.emplace_back("/metadata");
85 }
86
87 for (const auto& entry : fstab) {
88 std::string parent_bdev = entry.blk_device;
89 while (true) {
90 auto basename = android::base::Basename(parent_bdev);
91 if (!android::base::StartsWith(basename, "dm-")) {
92 break;
93 }
94
95 auto parent = dm.GetParentBlockDeviceByPath(parent_bdev);
96 if (!parent || *parent == parent_bdev) {
97 break;
98 }
99 parent_bdev = *parent;
100 }
101
102 if (parent_bdev == userdata_bdev ||
103 android::base::StartsWith(parent_bdev, "/dev/block/loop")) {
104 if (entry.flags & MS_RDONLY) {
105 // APEXes should not be F2FS.
106 EXPECT_NE(entry.fs_type, "f2fs");
107 }
108 continue;
109 }
110
111 if (entry.flags & MS_RDONLY) {
112 if (parent_bdev != super_bdev) {
113 // Ignore non-AOSP partitions (eg anything outside of super).
114 continue;
115 }
116
117 std::vector<std::string> allowed = {"erofs", "ext4", "f2fs"};
118 EXPECT_NE(std::find(allowed.begin(), allowed.end(), entry.fs_type), allowed.end())
119 << entry.mount_point;
120 } else {
121 if (std::find(must_be_f2fs.begin(), must_be_f2fs.end(), entry.mount_point) !=
122 must_be_f2fs.end()) {
123 EXPECT_EQ(entry.fs_type, "f2fs") << entry.mount_point;
124 }
125 }
126 }
127 }
128
TEST(fs,NoDtFstab)129 TEST(fs, NoDtFstab) {
130 if (GetVsrLevel() < __ANDROID_API_Q__) {
131 GTEST_SKIP();
132 }
133
134 android::fs_mgr::Fstab fstab;
135 EXPECT_FALSE(android::fs_mgr::ReadFstabFromDt(&fstab, false));
136 }
137
TEST(fs,NoLegacyVerifiedBoot)138 TEST(fs, NoLegacyVerifiedBoot) {
139 if (GetVsrLevel() < __ANDROID_API_T__) {
140 GTEST_SKIP();
141 }
142
143 const auto& default_fstab_path = android::fs_mgr::GetFstabPath();
144 EXPECT_FALSE(default_fstab_path.empty());
145
146 std::string fstab_str;
147 EXPECT_TRUE(android::base::ReadFileToString(default_fstab_path, &fstab_str,
148 /* follow_symlinks = */ true));
149
150 for (const auto& line : android::base::Split(fstab_str, "\n")) {
151 auto fields = android::base::Tokenize(line, " \t");
152 // Ignores empty lines and comments.
153 if (fields.empty() || android::base::StartsWith(fields.front(), '#')) {
154 continue;
155 }
156 // Each line in a fstab should have at least five entries.
157 // <src> <mnt_point> <type> <mnt_flags and options> <fs_mgr_flags>
158 ASSERT_GE(fields.size(), 5);
159 EXPECT_THAT(android::base::Split(fields[4], ","), Not(Contains("verify")))
160 << "AVB 1.0 isn't supported now, but the 'verify' flag is found:\n"
161 << " " << line;
162 }
163 }
164