1 //
2 // Copyright (C) 2009 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 "update_engine/payload_consumer/bzip_extent_writer.h"
18
19 #include <fcntl.h>
20
21 #include <algorithm>
22 #include <string>
23 #include <vector>
24
25 #include <brillo/make_unique_ptr.h>
26 #include <gtest/gtest.h>
27
28 #include "update_engine/common/test_utils.h"
29 #include "update_engine/common/utils.h"
30
31 using std::min;
32 using std::string;
33 using std::vector;
34
35 namespace chromeos_update_engine {
36
37 namespace {
38 const uint32_t kBlockSize = 4096;
39 }
40
41 class BzipExtentWriterTest : public ::testing::Test {
42 protected:
SetUp()43 void SetUp() override {
44 fd_.reset(new EintrSafeFileDescriptor);
45 ASSERT_TRUE(fd_->Open(temp_file_.path().c_str(), O_RDWR, 0600));
46 }
TearDown()47 void TearDown() override {
48 fd_->Close();
49 }
50 void WriteAlignedExtents(size_t chunk_size, size_t first_chunk_size);
51 void TestZeroPad(bool aligned_size);
52
53 FileDescriptorPtr fd_;
54 test_utils::ScopedTempFile temp_file_{"BzipExtentWriterTest-file.XXXXXX"};
55 };
56
TEST_F(BzipExtentWriterTest,SimpleTest)57 TEST_F(BzipExtentWriterTest, SimpleTest) {
58 vector<Extent> extents;
59 Extent extent;
60 extent.set_start_block(0);
61 extent.set_num_blocks(1);
62 extents.push_back(extent);
63
64 // 'echo test | bzip2 | hexdump' yields:
65 static const char test_uncompressed[] = "test\n";
66 static const uint8_t test[] = {
67 0x42, 0x5a, 0x68, 0x39, 0x31, 0x41, 0x59, 0x26, 0x53, 0x59, 0xcc, 0xc3,
68 0x71, 0xd4, 0x00, 0x00, 0x02, 0x41, 0x80, 0x00, 0x10, 0x02, 0x00, 0x0c,
69 0x00, 0x20, 0x00, 0x21, 0x9a, 0x68, 0x33, 0x4d, 0x19, 0x97, 0x8b, 0xb9,
70 0x22, 0x9c, 0x28, 0x48, 0x66, 0x61, 0xb8, 0xea, 0x00,
71 };
72
73 BzipExtentWriter bzip_writer(
74 brillo::make_unique_ptr(new DirectExtentWriter()));
75 EXPECT_TRUE(bzip_writer.Init(fd_, extents, kBlockSize));
76 EXPECT_TRUE(bzip_writer.Write(test, sizeof(test)));
77 EXPECT_TRUE(bzip_writer.End());
78
79 brillo::Blob buf;
80 EXPECT_TRUE(utils::ReadFile(temp_file_.path(), &buf));
81 EXPECT_EQ(strlen(test_uncompressed), buf.size());
82 EXPECT_EQ(string(buf.begin(), buf.end()), string(test_uncompressed));
83 }
84
TEST_F(BzipExtentWriterTest,ChunkedTest)85 TEST_F(BzipExtentWriterTest, ChunkedTest) {
86 // Generated with:
87 // yes "ABC" | head -c 819200 | bzip2 -9 |
88 // hexdump -v -e '" " 11/1 "0x%02x, " "\n"'
89 static const uint8_t kCompressedData[] = {
90 0x42, 0x5a, 0x68, 0x39, 0x31, 0x41, 0x59, 0x26, 0x53, 0x59, 0xbe,
91 0x1c, 0xda, 0xee, 0x03, 0x1f, 0xff, 0xc4, 0x00, 0x00, 0x10, 0x38,
92 0x00, 0x20, 0x00, 0x50, 0x66, 0x9a, 0x05, 0x28, 0x38, 0x00, 0x11,
93 0x60, 0x00, 0x22, 0xd0, 0x00, 0x45, 0xc0, 0x00, 0x8b, 0xc5, 0xdc,
94 0x91, 0x4e, 0x14, 0x24, 0x2f, 0x87, 0x36, 0xbb, 0x80};
95 brillo::Blob compressed_data(std::begin(kCompressedData),
96 std::end(kCompressedData));
97
98 const brillo::Blob::size_type kDecompressedLength = 800 * 1024; // 800 KiB
99 const size_t kChunkSize = 3;
100
101 brillo::Blob decompressed_data(kDecompressedLength);
102 for (size_t i = 0; i < decompressed_data.size(); ++i)
103 decompressed_data[i] = static_cast<uint8_t>("ABC\n"[i % 4]);
104
105 vector<Extent> extents;
106 Extent extent;
107 extent.set_start_block(0);
108 extent.set_num_blocks((kDecompressedLength + kBlockSize - 1) / kBlockSize);
109 extents.push_back(extent);
110
111 BzipExtentWriter bzip_writer(
112 brillo::make_unique_ptr(new DirectExtentWriter()));
113 EXPECT_TRUE(bzip_writer.Init(fd_, extents, kBlockSize));
114
115 brillo::Blob original_compressed_data = compressed_data;
116 for (brillo::Blob::size_type i = 0; i < compressed_data.size();
117 i += kChunkSize) {
118 size_t this_chunk_size = min(kChunkSize, compressed_data.size() - i);
119 EXPECT_TRUE(bzip_writer.Write(&compressed_data[i], this_chunk_size));
120 }
121 EXPECT_TRUE(bzip_writer.End());
122
123 // Check that the const input has not been clobbered.
124 test_utils::ExpectVectorsEq(original_compressed_data, compressed_data);
125
126 brillo::Blob output;
127 EXPECT_TRUE(utils::ReadFile(temp_file_.path(), &output));
128 EXPECT_EQ(kDecompressedLength, output.size());
129 test_utils::ExpectVectorsEq(decompressed_data, output);
130 }
131
132 } // namespace chromeos_update_engine
133