//
|
// Copyright (C) 2015 The Android Open Source Project
|
//
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
// you may not use this file except in compliance with the License.
|
// You may obtain a copy of the License at
|
//
|
// http://www.apache.org/licenses/LICENSE-2.0
|
//
|
// Unless required by applicable law or agreed to in writing, software
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
// See the License for the specific language governing permissions and
|
// limitations under the License.
|
//
|
|
#include "update_engine/payload_generator/block_mapping.h"
|
|
#include <fcntl.h>
|
#include <sys/stat.h>
|
#include <sys/types.h>
|
|
#include <string>
|
#include <vector>
|
|
#include <gtest/gtest.h>
|
|
#include "update_engine/common/test_utils.h"
|
#include "update_engine/common/utils.h"
|
|
using std::string;
|
using std::vector;
|
|
namespace chromeos_update_engine {
|
|
class BlockMappingTest : public ::testing::Test {
|
protected:
|
// Old new partition files used in testing.
|
test_utils::ScopedTempFile old_part_{"BlockMappingTest_old.XXXXXX"};
|
test_utils::ScopedTempFile new_part_{"BlockMappingTest_new.XXXXXX"};
|
|
size_t block_size_{1024};
|
BlockMapping bm_{block_size_}; // BlockMapping under test.
|
};
|
|
TEST_F(BlockMappingTest, FirstAddedBlockIsZero) {
|
brillo::Blob blob(block_size_);
|
// The BlockMapping just assigns the block ids in order, so it doesn't matter
|
// what are the contents of the first block.
|
blob[0] = 42;
|
EXPECT_EQ(0, bm_.AddBlock(blob));
|
blob[0] = 5;
|
EXPECT_EQ(1, bm_.AddBlock(blob));
|
}
|
|
TEST_F(BlockMappingTest, BlocksAreNotKeptInMemory) {
|
test_utils::WriteFileString(old_part_.path(), string(block_size_, 'a'));
|
int old_fd = HANDLE_EINTR(open(old_part_.path().c_str(), O_RDONLY));
|
ScopedFdCloser old_fd_closer(&old_fd);
|
|
EXPECT_EQ(0, bm_.AddDiskBlock(old_fd, 0));
|
|
// Check that the block_data is not stored on memory if we just used the block
|
// once.
|
for (const auto& it : bm_.mapping_) {
|
for (const BlockMapping::UniqueBlock& ublock : it.second) {
|
EXPECT_TRUE(ublock.block_data.empty());
|
}
|
}
|
|
brillo::Blob block(block_size_, 'a');
|
for (int i = 0; i < 5; ++i) {
|
// Re-add the same block 5 times.
|
EXPECT_EQ(0, bm_.AddBlock(block));
|
}
|
|
for (const auto& it : bm_.mapping_) {
|
for (const BlockMapping::UniqueBlock& ublock : it.second) {
|
EXPECT_FALSE(ublock.block_data.empty());
|
// The block was loaded from disk only 4 times, and after that the counter
|
// is not updated anymore.
|
EXPECT_EQ(4U, ublock.times_read);
|
}
|
}
|
}
|
|
TEST_F(BlockMappingTest, MapPartitionBlocks) {
|
// A string with 10 blocks where all the blocks are different.
|
string old_contents(10 * block_size_, '\0');
|
for (size_t i = 0; i < old_contents.size(); ++i)
|
old_contents[i] = 4 + i / block_size_;
|
test_utils::WriteFileString(old_part_.path(), old_contents);
|
|
// A string including the block with all zeros and overlapping some of the
|
// other blocks in old_contents.
|
string new_contents(6 * block_size_, '\0');
|
for (size_t i = 0; i < new_contents.size(); ++i)
|
new_contents[i] = i / block_size_;
|
test_utils::WriteFileString(new_part_.path(), new_contents);
|
|
vector<BlockMapping::BlockId> old_ids, new_ids;
|
EXPECT_TRUE(MapPartitionBlocks(old_part_.path(),
|
new_part_.path(),
|
old_contents.size(),
|
new_contents.size(),
|
block_size_,
|
&old_ids,
|
&new_ids));
|
|
EXPECT_EQ((vector<BlockMapping::BlockId>{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}),
|
old_ids);
|
EXPECT_EQ((vector<BlockMapping::BlockId>{0, 11, 12, 13, 1, 2}), new_ids);
|
}
|
|
} // namespace chromeos_update_engine
|
