--- /dev/null
+// 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 "leveldb/db.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include "leveldb/cache.h"
+#include "leveldb/env.h"
+#include "leveldb/table.h"
+#include "leveldb/write_batch.h"
+#include "db/db_impl.h"
+#include "db/filename.h"
+#include "db/log_format.h"
+#include "db/version_set.h"
+#include "util/logging.h"
+#include "util/testharness.h"
+#include "util/testutil.h"
+
+namespace leveldb {
+
+static const int kValueSize = 1000;
+
+class CorruptionTest {
+ public:
+ test::ErrorEnv env_;
+ std::string dbname_;
+ Cache* tiny_cache_;
+ Options options_;
+ DB* db_;
+
+ CorruptionTest() {
+ tiny_cache_ = NewLRUCache(100);
+ options_.env = &env_;
+ dbname_ = test::TmpDir() + "/db_test";
+ DestroyDB(dbname_, options_);
+
+ db_ = NULL;
+ options_.create_if_missing = true;
+ Reopen();
+ options_.create_if_missing = false;
+ }
+
+ ~CorruptionTest() {
+ delete db_;
+ DestroyDB(dbname_, Options());
+ delete tiny_cache_;
+ }
+
+ Status TryReopen(Options* options = NULL) {
+ delete db_;
+ db_ = NULL;
+ Options opt = (options ? *options : options_);
+ opt.env = &env_;
+ opt.block_cache = tiny_cache_;
+ return DB::Open(opt, dbname_, &db_);
+ }
+
+ void Reopen(Options* options = NULL) {
+ ASSERT_OK(TryReopen(options));
+ }
+
+ void RepairDB() {
+ delete db_;
+ db_ = NULL;
+ ASSERT_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) fprintf(stderr, "@ %d of %d\n", i, n);
+ Slice key = Key(i, &key_space);
+ batch.Clear();
+ batch.Put(key, Value(i, &value_space));
+ ASSERT_OK(db_->Write(WriteOptions(), &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 (!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;
+
+ 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_OK(env_.GetChildren(dbname_, &filenames));
+ uint64_t number;
+ FileType type;
+ std::string fname;
+ int picked_number = -1;
+ for (int 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;
+
+ struct stat sbuf;
+ if (stat(fname.c_str(), &sbuf) != 0) {
+ const char* msg = strerror(errno);
+ ASSERT_TRUE(false) << fname << ": " << msg;
+ }
+
+ if (offset < 0) {
+ // Relative to end of file; make it absolute
+ if (-offset > sbuf.st_size) {
+ offset = 0;
+ } else {
+ offset = sbuf.st_size + offset;
+ }
+ }
+ if (offset > sbuf.st_size) {
+ offset = sbuf.st_size;
+ }
+ if (offset + bytes_to_corrupt > sbuf.st_size) {
+ bytes_to_corrupt = sbuf.st_size - offset;
+ }
+
+ // Do it
+ std::string contents;
+ Status s = ReadFileToString(Env::Default(), fname, &contents);
+ ASSERT_TRUE(s.ok()) << s.ToString();
+ for (int i = 0; i < bytes_to_corrupt; i++) {
+ contents[i + offset] ^= 0x80;
+ }
+ s = WriteStringToFile(Env::Default(), 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];
+ 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(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(CorruptionTest, RecoverWriteError) {
+ env_.writable_file_error_ = true;
+ Status s = TryReopen();
+ ASSERT_TRUE(!s.ok());
+}
+
+TEST(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(CorruptionTest, TableFile) {
+ Build(100);
+ DBImpl* dbi = reinterpret_cast<DBImpl*>(db_);
+ dbi->TEST_CompactMemTable();
+ dbi->TEST_CompactRange(0, NULL, NULL);
+ dbi->TEST_CompactRange(1, NULL, NULL);
+
+ Corrupt(kTableFile, 100, 1);
+ Check(99, 99);
+}
+
+TEST(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(CorruptionTest, MissingDescriptor) {
+ Build(1000);
+ RepairDB();
+ Reopen();
+ Check(1000, 1000);
+}
+
+TEST(CorruptionTest, SequenceNumberRecovery) {
+ ASSERT_OK(db_->Put(WriteOptions(), "foo", "v1"));
+ ASSERT_OK(db_->Put(WriteOptions(), "foo", "v2"));
+ ASSERT_OK(db_->Put(WriteOptions(), "foo", "v3"));
+ ASSERT_OK(db_->Put(WriteOptions(), "foo", "v4"));
+ ASSERT_OK(db_->Put(WriteOptions(), "foo", "v5"));
+ RepairDB();
+ Reopen();
+ std::string v;
+ ASSERT_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_OK(db_->Put(WriteOptions(), "foo", "v6"));
+ ASSERT_OK(db_->Get(ReadOptions(), "foo", &v));
+ ASSERT_EQ("v6", v);
+ Reopen();
+ ASSERT_OK(db_->Get(ReadOptions(), "foo", &v));
+ ASSERT_EQ("v6", v);
+}
+
+TEST(CorruptionTest, CorruptedDescriptor) {
+ ASSERT_OK(db_->Put(WriteOptions(), "foo", "hello"));
+ DBImpl* dbi = reinterpret_cast<DBImpl*>(db_);
+ dbi->TEST_CompactMemTable();
+ dbi->TEST_CompactRange(0, NULL, NULL);
+
+ Corrupt(kDescriptorFile, 0, 1000);
+ Status s = TryReopen();
+ ASSERT_TRUE(!s.ok());
+
+ RepairDB();
+ Reopen();
+ std::string v;
+ ASSERT_OK(db_->Get(ReadOptions(), "foo", &v));
+ ASSERT_EQ("hello", v);
+}
+
+TEST(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(9, 9);
+
+ // Force compactions by writing lots of values
+ Build(10000);
+ Check(10000, 10000);
+}
+
+TEST(CorruptionTest, CompactionInputErrorParanoid) {
+ Options options;
+ options.paranoid_checks = true;
+ options.write_buffer_size = 1048576;
+ Reopen(&options);
+ DBImpl* dbi = reinterpret_cast<DBImpl*>(db_);
+
+ // Fill levels >= 1 so memtable compaction outputs to level 1
+ for (int level = 1; level < config::kNumLevels; level++) {
+ dbi->Put(WriteOptions(), "", "begin");
+ dbi->Put(WriteOptions(), "~", "end");
+ dbi->TEST_CompactMemTable();
+ }
+
+ Build(10);
+ dbi->TEST_CompactMemTable();
+ ASSERT_EQ(1, Property("leveldb.num-files-at-level0"));
+
+ Corrupt(kTableFile, 100, 1);
+ Check(9, 9);
+
+ // Write must eventually fail because of corrupted table
+ Status s;
+ std::string tmp1, tmp2;
+ for (int i = 0; i < 10000 && s.ok(); i++) {
+ s = db_->Put(WriteOptions(), Key(i, &tmp1), Value(i, &tmp2));
+ }
+ ASSERT_TRUE(!s.ok()) << "write did not fail in corrupted paranoid db";
+}
+
+TEST(CorruptionTest, UnrelatedKeys) {
+ Build(10);
+ DBImpl* dbi = reinterpret_cast<DBImpl*>(db_);
+ dbi->TEST_CompactMemTable();
+ Corrupt(kTableFile, 100, 1);
+
+ std::string tmp1, tmp2;
+ ASSERT_OK(db_->Put(WriteOptions(), Key(1000, &tmp1), Value(1000, &tmp2)));
+ std::string v;
+ ASSERT_OK(db_->Get(ReadOptions(), Key(1000, &tmp1), &v));
+ ASSERT_EQ(Value(1000, &tmp2).ToString(), v);
+ dbi->TEST_CompactMemTable();
+ ASSERT_OK(db_->Get(ReadOptions(), Key(1000, &tmp1), &v));
+ ASSERT_EQ(Value(1000, &tmp2).ToString(), v);
+}
+
+} // namespace leveldb
+
+int main(int argc, char** argv) {
+ return leveldb::test::RunAllTests();
+}
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