- // Copyright (c) 2011 The LevelDB Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file. See the AUTHORS file for names of contributors.
-
- #include <sys/types.h>
-
- #include "gtest/gtest.h"
- #include "db/db_impl.h"
- #include "db/filename.h"
- #include "db/log_format.h"
- #include "db/version_set.h"
- #include "leveldb/cache.h"
- #include "leveldb/db.h"
- #include "leveldb/table.h"
- #include "leveldb/write_batch.h"
- #include "util/logging.h"
- #include "util/testutil.h"
-
- namespace leveldb {
-
- static const int kValueSize = 1000;
-
- class CorruptionTest : public testing::Test {
- public:
- CorruptionTest()
- : db_(nullptr),
- dbname_("/memenv/corruption_test"),
- tiny_cache_(NewLRUCache(100)) {
- options_.env = &env_;
- options_.block_cache = tiny_cache_;
- DestroyDB(dbname_, options_);
-
- options_.create_if_missing = true;
- Reopen();
- options_.create_if_missing = false;
- }
-
- ~CorruptionTest() {
- delete db_;
- delete tiny_cache_;
- }
-
- Status TryReopen() {
- delete db_;
- db_ = nullptr;
- return DB::Open(options_, dbname_, &db_);
- }
-
- void Reopen() { ASSERT_LEVELDB_OK(TryReopen()); }
-
- void RepairDB() {
- delete db_;
- db_ = nullptr;
- ASSERT_LEVELDB_OK(::leveldb::RepairDB(dbname_, options_));
- }
-
- void Build(int n) {
- std::string key_space, value_space;
- WriteBatch batch;
- for (int i = 0; i < n; i++) {
- // if ((i % 100) == 0) std::fprintf(stderr, "@ %d of %d\n", i, n);
- Slice key = Key(i, &key_space);
- batch.Clear();
- batch.Put(key, Value(i, &value_space));
- WriteOptions options;
- // Corrupt() doesn't work without this sync on windows; stat reports 0 for
- // the file size.
- if (i == n - 1) {
- options.sync = true;
- }
- ASSERT_LEVELDB_OK(db_->Write(options, &batch));
- }
- }
-
- void Check(int min_expected, int max_expected) {
- int next_expected = 0;
- int missed = 0;
- int bad_keys = 0;
- int bad_values = 0;
- int correct = 0;
- std::string value_space;
- Iterator* iter = db_->NewIterator(ReadOptions());
- for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
- uint64_t key;
- Slice in(iter->key());
- if (in == "" || in == "~") {
- // Ignore boundary keys.
- continue;
- }
- if (!ConsumeDecimalNumber(&in, &key) || !in.empty() ||
- key < next_expected) {
- bad_keys++;
- continue;
- }
- missed += (key - next_expected);
- next_expected = key + 1;
- if (iter->value() != Value(key, &value_space)) {
- bad_values++;
- } else {
- correct++;
- }
- }
- delete iter;
-
- std::fprintf(
- stderr,
- "expected=%d..%d; got=%d; bad_keys=%d; bad_values=%d; missed=%d\n",
- min_expected, max_expected, correct, bad_keys, bad_values, missed);
- ASSERT_LE(min_expected, correct);
- ASSERT_GE(max_expected, correct);
- }
-
- void Corrupt(FileType filetype, int offset, int bytes_to_corrupt) {
- // Pick file to corrupt
- std::vector<std::string> filenames;
- ASSERT_LEVELDB_OK(env_.target()->GetChildren(dbname_, &filenames));
- uint64_t number;
- FileType type;
- std::string fname;
- int picked_number = -1;
- for (size_t i = 0; i < filenames.size(); i++) {
- if (ParseFileName(filenames[i], &number, &type) && type == filetype &&
- int(number) > picked_number) { // Pick latest file
- fname = dbname_ + "/" + filenames[i];
- picked_number = number;
- }
- }
- ASSERT_TRUE(!fname.empty()) << filetype;
-
- uint64_t file_size;
- ASSERT_LEVELDB_OK(env_.target()->GetFileSize(fname, &file_size));
-
- if (offset < 0) {
- // Relative to end of file; make it absolute
- if (-offset > file_size) {
- offset = 0;
- } else {
- offset = file_size + offset;
- }
- }
- if (offset > file_size) {
- offset = file_size;
- }
- if (offset + bytes_to_corrupt > file_size) {
- bytes_to_corrupt = file_size - offset;
- }
-
- // Do it
- std::string contents;
- Status s = ReadFileToString(env_.target(), fname, &contents);
- ASSERT_TRUE(s.ok()) << s.ToString();
- for (int i = 0; i < bytes_to_corrupt; i++) {
- contents[i + offset] ^= 0x80;
- }
- s = WriteStringToFile(env_.target(), contents, fname);
- ASSERT_TRUE(s.ok()) << s.ToString();
- }
-
- int Property(const std::string& name) {
- std::string property;
- int result;
- if (db_->GetProperty(name, &property) &&
- sscanf(property.c_str(), "%d", &result) == 1) {
- return result;
- } else {
- return -1;
- }
- }
-
- // Return the ith key
- Slice Key(int i, std::string* storage) {
- char buf[100];
- std::snprintf(buf, sizeof(buf), "%016d", i);
- storage->assign(buf, strlen(buf));
- return Slice(*storage);
- }
-
- // Return the value to associate with the specified key
- Slice Value(int k, std::string* storage) {
- Random r(k);
- return test::RandomString(&r, kValueSize, storage);
- }
-
- test::ErrorEnv env_;
- Options options_;
- DB* db_;
-
- private:
- std::string dbname_;
- Cache* tiny_cache_;
- };
-
- TEST_F(CorruptionTest, Recovery) {
- Build(100);
- Check(100, 100);
- Corrupt(kLogFile, 19, 1); // WriteBatch tag for first record
- Corrupt(kLogFile, log::kBlockSize + 1000, 1); // Somewhere in second block
- Reopen();
-
- // The 64 records in the first two log blocks are completely lost.
- Check(36, 36);
- }
-
- TEST_F(CorruptionTest, RecoverWriteError) {
- env_.writable_file_error_ = true;
- Status s = TryReopen();
- ASSERT_TRUE(!s.ok());
- }
-
- TEST_F(CorruptionTest, NewFileErrorDuringWrite) {
- // Do enough writing to force minor compaction
- env_.writable_file_error_ = true;
- const int num = 3 + (Options().write_buffer_size / kValueSize);
- std::string value_storage;
- Status s;
- for (int i = 0; s.ok() && i < num; i++) {
- WriteBatch batch;
- batch.Put("a", Value(100, &value_storage));
- s = db_->Write(WriteOptions(), &batch);
- }
- ASSERT_TRUE(!s.ok());
- ASSERT_GE(env_.num_writable_file_errors_, 1);
- env_.writable_file_error_ = false;
- Reopen();
- }
-
- TEST_F(CorruptionTest, TableFile) {
- Build(100);
- DBImpl* dbi = reinterpret_cast<DBImpl*>(db_);
- dbi->TEST_CompactMemTable();
- dbi->TEST_CompactRange(0, nullptr, nullptr, false);
- dbi->TEST_CompactRange(1, nullptr, nullptr, false);
-
- Corrupt(kTableFile, 100, 1);
- Check(90, 99);
- }
-
- TEST_F(CorruptionTest, TableFileRepair) {
- options_.block_size = 2 * kValueSize; // Limit scope of corruption
- options_.paranoid_checks = true;
- Reopen();
- Build(100);
- DBImpl* dbi = reinterpret_cast<DBImpl*>(db_);
- dbi->TEST_CompactMemTable();
- dbi->TEST_CompactRange(0, nullptr, nullptr, false);
- dbi->TEST_CompactRange(1, nullptr, nullptr, false);
-
- Corrupt(kTableFile, 100, 1);
- RepairDB();
- Reopen();
- Check(95, 99);
- }
-
- TEST_F(CorruptionTest, TableFileIndexData) {
- Build(10000); // Enough to build multiple Tables
- DBImpl* dbi = reinterpret_cast<DBImpl*>(db_);
- dbi->TEST_CompactMemTable();
-
- Corrupt(kTableFile, -2000, 500);
- Reopen();
- Check(5000, 9999);
- }
-
- TEST_F(CorruptionTest, MissingDescriptor) {
- Build(1000);
- RepairDB();
- Reopen();
- Check(1000, 1000);
- }
-
- TEST_F(CorruptionTest, SequenceNumberRecovery) {
- ASSERT_LEVELDB_OK(db_->Put(WriteOptions(), "foo", "v1"));
- ASSERT_LEVELDB_OK(db_->Put(WriteOptions(), "foo", "v2"));
- ASSERT_LEVELDB_OK(db_->Put(WriteOptions(), "foo", "v3"));
- ASSERT_LEVELDB_OK(db_->Put(WriteOptions(), "foo", "v4"));
- ASSERT_LEVELDB_OK(db_->Put(WriteOptions(), "foo", "v5"));
- RepairDB();
- Reopen();
- std::string v;
- ASSERT_LEVELDB_OK(db_->Get(ReadOptions(), "foo", &v));
- ASSERT_EQ("v5", v);
- // Write something. If sequence number was not recovered properly,
- // it will be hidden by an earlier write.
- ASSERT_LEVELDB_OK(db_->Put(WriteOptions(), "foo", "v6"));
- ASSERT_LEVELDB_OK(db_->Get(ReadOptions(), "foo", &v));
- ASSERT_EQ("v6", v);
- Reopen();
- ASSERT_LEVELDB_OK(db_->Get(ReadOptions(), "foo", &v));
- ASSERT_EQ("v6", v);
- }
-
- TEST_F(CorruptionTest, CorruptedDescriptor) {
- ASSERT_LEVELDB_OK(db_->Put(WriteOptions(), "foo", "hello"));
- DBImpl* dbi = reinterpret_cast<DBImpl*>(db_);
- dbi->TEST_CompactMemTable();
- dbi->TEST_CompactRange(0, nullptr, nullptr, false);
-
- Corrupt(kDescriptorFile, 0, 1000);
- Status s = TryReopen();
- ASSERT_TRUE(!s.ok());
-
- RepairDB();
- Reopen();
- std::string v;
- ASSERT_LEVELDB_OK(db_->Get(ReadOptions(), "foo", &v));
- ASSERT_EQ("hello", v);
- }
-
- TEST_F(CorruptionTest, CompactionInputError) {
- Build(10);
- DBImpl* dbi = reinterpret_cast<DBImpl*>(db_);
- dbi->TEST_CompactMemTable();
- const int last = config::kMaxMemCompactLevel;
- ASSERT_EQ(1, Property("leveldb.num-files-at-level" + NumberToString(last)));
-
- Corrupt(kTableFile, 100, 1);
- Check(5, 9);
-
- // Force compactions by writing lots of values
- Build(10000);
- Check(10000, 10000);
- }
-
- TEST_F(CorruptionTest, CompactionInputErrorParanoid) {
- options_.paranoid_checks = true;
- options_.write_buffer_size = 512 << 10;
- Reopen();
- DBImpl* dbi = reinterpret_cast<DBImpl*>(db_);
-
- // Make multiple inputs so we need to compact.
- for (int i = 0; i < 2; i++) {
- Build(10);
- dbi->TEST_CompactMemTable();
- Corrupt(kTableFile, 100, 1);
- env_.SleepForMicroseconds(100000);
- }
- dbi->CompactRange(nullptr, nullptr);
-
- // Write must fail because of corrupted table
- std::string tmp1, tmp2;
- Status s = db_->Put(WriteOptions(), Key(5, &tmp1), Value(5, &tmp2));
- ASSERT_TRUE(!s.ok()) << "write did not fail in corrupted paranoid db";
- }
-
- TEST_F(CorruptionTest, UnrelatedKeys) {
- Build(10);
- DBImpl* dbi = reinterpret_cast<DBImpl*>(db_);
- dbi->TEST_CompactMemTable();
- Corrupt(kTableFile, 100, 1);
-
- std::string tmp1, tmp2;
- ASSERT_LEVELDB_OK(
- db_->Put(WriteOptions(), Key(1000, &tmp1), Value(1000, &tmp2)));
- std::string v;
- ASSERT_LEVELDB_OK(db_->Get(ReadOptions(), Key(1000, &tmp1), &v));
- ASSERT_EQ(Value(1000, &tmp2).ToString(), v);
- dbi->TEST_CompactMemTable();
- ASSERT_LEVELDB_OK(db_->Get(ReadOptions(), Key(1000, &tmp1), &v));
- ASSERT_EQ(Value(1000, &tmp2).ToString(), v);
- }
-
- } // namespace leveldb
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