avoid direct io in rocksdb_lite

Summary:
fix lite bugs
disable direct io in lite mode
Closes https://github.com/facebook/rocksdb/pull/1870

Differential Revision: D4559866

Pulled By: yiwu-arbug

fbshipit-source-id: 3761c51

db/db_flush_test.cc

@@ -74,7 +74,9 @@ TEST_F(DBFlushTest, SyncFail) {
   TEST_SYNC_POINT("DBFlushTest::SyncFail:2");
   fault_injection_env->SetFilesystemActive(true);
   dbfull()->TEST_WaitForFlushMemTable();
+#ifndef ROCKSDB_LITE
   ASSERT_EQ("", FilesPerLevel());  // flush failed.
+#endif                             // ROCKSDB_LITE
   // Flush job should release ref count to current version.
   ASSERT_EQ(refs_before, cfd->current()->TEST_refs());
   Destroy(options);

db/repair_test.cc

@@ -19,6 +19,7 @@
 
 namespace rocksdb {
 
+#ifndef ROCKSDB_LITE
 class RepairTest : public DBTestBase {
  public:
   RepairTest() : DBTestBase("/repair_test") {}
@@ -273,6 +274,8 @@ TEST_F(RepairTest, RepairColumnFamilyOptions) {
     }
   }
 }
+
+#endif  // ROCKSDB_LITE
 }  // namespace rocksdb
 
 int main(int argc, char** argv) {

db/version_set.cc

@@ -2361,8 +2361,7 @@ Status VersionSet::LogAndApply(ColumnFamilyData* column_family_data,
     // If we just created a new descriptor file, install it by writing a
     // new CURRENT file that points to it.
     if (s.ok() && new_descriptor_log) {
-      s = SetCurrentFile(
-          env_, dbname_, pending_manifest_file_number_,
+      s = SetCurrentFile(env_, dbname_, pending_manifest_file_number_,
                          db_directory);
     }
 

include/rocksdb/options.h

@@ -1121,10 +1121,12 @@ struct DBOptions {
 
   // Use O_DIRECT for reading file
   // Default: false
+  // Not supported in ROCKSDB_LITE mode!
   bool use_direct_reads = false;
 
   // Use O_DIRECT for writing file
   // Default: false
+  // Not supported in ROCKSDB_LITE mode!
   bool use_direct_writes = false;
 
   // If false, fallocate() calls are bypassed

util/env_posix.cc

@@ -156,6 +156,9 @@ class PosixEnv : public Env {
     FILE* file = nullptr;
 
     if (options.use_direct_reads && !options.use_mmap_reads) {
+#ifdef ROCKSDB_LITE
+      return Status::IOError(fname, "Direct I/O not supported in RocksDB lite");
+#endif  // !ROCKSDB_LITE
 #ifndef OS_MACOSX
       flags |= O_DIRECT;
 #endif
@@ -200,6 +203,9 @@ class PosixEnv : public Env {
     int fd;
     int flags = O_RDONLY;
     if (options.use_direct_reads && !options.use_mmap_reads) {
+#ifdef ROCKSDB_LITE
+      return Status::IOError(fname, "Direct I/O not supported in RocksDB lite");
+#endif  // !ROCKSDB_LITE
 #ifndef OS_MACOSX
       flags |= O_DIRECT;
       TEST_SYNC_POINT_CALLBACK("NewRandomAccessFile:O_DIRECT", &flags);
@@ -261,6 +267,9 @@ class PosixEnv : public Env {
       // appends data to the end of the file, regardless of the value of
       // offset.
       // More info here: https://linux.die.net/man/2/pwrite
+#ifdef ROCKSDB_LITE
+      return Status::IOError(fname, "Direct I/O not supported in RocksDB lite");
+#endif  // !ROCKSDB_LITE
       flags |= O_WRONLY;
 #ifndef OS_MACOSX
       flags |= O_DIRECT;
@@ -325,6 +334,9 @@ class PosixEnv : public Env {
     int flags = 0;
     // Direct IO mode with O_DIRECT flag or F_NOCAHCE (MAC OSX)
     if (options.use_direct_writes && !options.use_mmap_writes) {
+#ifdef ROCKSDB_LITE
+      return Status::IOError(fname, "Direct I/O not supported in RocksDB lite");
+#endif  // !ROCKSDB_LITE
       flags |= O_WRONLY;
 #ifndef OS_MACOSX
       flags |= O_DIRECT;

util/env_test.cc

@@ -88,13 +88,19 @@ class EnvPosixTest : public testing::Test {
 
  public:
   Env* env_;
-  EnvPosixTest() : env_(Env::Default()) { }
+  bool direct_io_;
+  EnvPosixTest() : env_(Env::Default()), direct_io_(false) {}
 };
 
-class EnvPosixTestWithParam : public EnvPosixTest,
-                              public ::testing::WithParamInterface<Env*> {
+class EnvPosixTestWithParam
+    : public EnvPosixTest,
+      public ::testing::WithParamInterface<std::pair<Env*, bool>> {
  public:
-  EnvPosixTestWithParam() { env_ = GetParam(); }
+  EnvPosixTestWithParam() {
+    std::pair<Env*, bool> param_pair = GetParam();
+    env_ = param_pair.first;
+    direct_io_ = param_pair.second;
+  }
 
   void WaitThreadPoolsEmpty() {
     // Wait until the thread pools are empty.
@@ -678,14 +684,15 @@ class IoctlFriendlyTmpdir {
   std::string dir_;
 };
 
-TEST_F(EnvPosixTest, PositionedAppend) {
+TEST_P(EnvPosixTestWithParam, PositionedAppend) {
+  if (direct_io_ && env_ == Env::Default()) {
     unique_ptr<WritableFile> writable_file;
-
     EnvOptions options;
-  options.use_direct_writes = true;
+    options.use_direct_writes = direct_io_;
     options.use_mmap_writes = false;
     IoctlFriendlyTmpdir ift;
-  ASSERT_OK(env_->NewWritableFile(ift.name() + "/f", &writable_file, options));
+    ASSERT_OK(
+        env_->NewWritableFile(ift.name() + "/f", &writable_file, options));
 
     const size_t kBlockSize = 512;
     const size_t kPageSize = 4096;
@@ -710,14 +717,15 @@ TEST_F(EnvPosixTest, PositionedAppend) {
     ASSERT_EQ(kPageSize + kBlockSize, result.size());
     ASSERT_EQ('a', result[kBlockSize - 1]);
     ASSERT_EQ('b', result[kBlockSize]);
+  }
 }
 
 // Only works in linux platforms
-TEST_F(EnvPosixTest, RandomAccessUniqueID) {
-  for (bool directio : {true, false}) {
+TEST_P(EnvPosixTestWithParam, RandomAccessUniqueID) {
   // Create file.
+  if (env_ == Env::Default()) {
     EnvOptions soptions;
-    soptions.use_direct_reads = soptions.use_direct_writes = directio;
+    soptions.use_direct_reads = soptions.use_direct_writes = direct_io_;
     IoctlFriendlyTmpdir ift;
     std::string fname = ift.name() + "/testfile";
     unique_ptr<WritableFile> wfile;
@@ -758,8 +766,8 @@ TEST_F(EnvPosixTest, RandomAccessUniqueID) {
 
 // only works in linux platforms
 #ifdef ROCKSDB_FALLOCATE_PRESENT
-TEST_F(EnvPosixTest, AllocateTest) {
-  for (bool directio : {true, false}) {
+TEST_P(EnvPosixTestWithParam, AllocateTest) {
+  if (env_ == Env::Default()) {
     IoctlFriendlyTmpdir ift;
     std::string fname = ift.name() + "/preallocate_testfile";
 
@@ -789,7 +797,7 @@ TEST_F(EnvPosixTest, AllocateTest) {
 
     EnvOptions soptions;
     soptions.use_mmap_writes = false;
-    soptions.use_direct_reads = soptions.use_direct_writes = directio;
+    soptions.use_direct_reads = soptions.use_direct_writes = direct_io_;
     unique_ptr<WritableFile> wfile;
     ASSERT_OK(env_->NewWritableFile(fname, &wfile, soptions));
 
@@ -846,11 +854,11 @@ bool HasPrefix(const std::unordered_set<std::string>& ss) {
 }
 
 // Only works in linux and WIN platforms
-TEST_F(EnvPosixTest, RandomAccessUniqueIDConcurrent) {
-  for (bool directio : {true, false}) {
+TEST_P(EnvPosixTestWithParam, RandomAccessUniqueIDConcurrent) {
+  if (env_ == Env::Default()) {
     // Check whether a bunch of concurrently existing files have unique IDs.
     EnvOptions soptions;
-    soptions.use_direct_reads = soptions.use_direct_writes = directio;
+    soptions.use_direct_reads = soptions.use_direct_writes = direct_io_;
 
     // Create the files
     IoctlFriendlyTmpdir ift;
@@ -888,10 +896,10 @@ TEST_F(EnvPosixTest, RandomAccessUniqueIDConcurrent) {
 }
 
 // Only works in linux and WIN platforms
-TEST_F(EnvPosixTest, RandomAccessUniqueIDDeletes) {
-  for (bool directio : {true, false}) {
+TEST_P(EnvPosixTestWithParam, RandomAccessUniqueIDDeletes) {
+  if (env_ == Env::Default()) {
     EnvOptions soptions;
-    soptions.use_direct_reads = soptions.use_direct_writes = directio;
+    soptions.use_direct_reads = soptions.use_direct_writes = direct_io_;
 
     IoctlFriendlyTmpdir ift;
     std::string fname = ift.name() + "/" + "testfile";
@@ -935,9 +943,8 @@ TEST_P(EnvPosixTestWithParam, DISABLED_InvalidateCache) {
 TEST_P(EnvPosixTestWithParam, InvalidateCache) {
 #endif
   rocksdb::SyncPoint::GetInstance()->EnableProcessing();
-  for (bool directio : {true, false}) {
     EnvOptions soptions;
-    soptions.use_direct_reads = soptions.use_direct_writes = directio;
+    soptions.use_direct_reads = soptions.use_direct_writes = direct_io_;
     std::string fname = test::TmpDir(env_) + "/" + "testfile";
 
     const size_t kSectorSize = 512;
@@ -997,7 +1004,6 @@ TEST_P(EnvPosixTestWithParam, InvalidateCache) {
     }
     // Delete the file
     ASSERT_OK(env_->DeleteFile(fname));
-  }
   rocksdb::SyncPoint::GetInstance()->ClearTrace();
 }
 #endif  // not TRAVIS
@@ -1121,12 +1127,10 @@ TEST_P(EnvPosixTestWithParam, LogBufferMaxSizeTest) {
 
 TEST_P(EnvPosixTestWithParam, Preallocation) {
   rocksdb::SyncPoint::GetInstance()->EnableProcessing();
-
-  for (bool directio : {true, false}) {
     const std::string src = test::TmpDir(env_) + "/" + "testfile";
     unique_ptr<WritableFile> srcfile;
     EnvOptions soptions;
-    soptions.use_direct_reads = soptions.use_direct_writes = directio;
+    soptions.use_direct_reads = soptions.use_direct_writes = direct_io_;
 #if !defined(OS_MACOSX) && !defined(OS_WIN)
     if (soptions.use_direct_writes) {
       rocksdb::SyncPoint::GetInstance()->SetCallBack(
@@ -1172,7 +1176,6 @@ TEST_P(EnvPosixTestWithParam, Preallocation) {
       srcfile->GetPreallocationStatus(&block_size, &last_allocated_block);
       ASSERT_EQ(last_allocated_block, 7UL);
     }
-  }
   rocksdb::SyncPoint::GetInstance()->ClearTrace();
 }
 
@@ -1180,9 +1183,8 @@ TEST_P(EnvPosixTestWithParam, Preallocation) {
 // individually) behave consistently.
 TEST_P(EnvPosixTestWithParam, ConsistentChildrenAttributes) {
   rocksdb::SyncPoint::GetInstance()->EnableProcessing();
-  for (bool directio : {true, false}) {
     EnvOptions soptions;
-    soptions.use_direct_reads = soptions.use_direct_writes = directio;
+    soptions.use_direct_reads = soptions.use_direct_writes = direct_io_;
     const int kNumChildren = 10;
 
     std::string data;
@@ -1224,7 +1226,6 @@ TEST_P(EnvPosixTestWithParam, ConsistentChildrenAttributes) {
       ASSERT_EQ(size, 512 * i);
       ASSERT_EQ(size, file_attrs_iter->size_bytes);
     }
-  }
   rocksdb::SyncPoint::GetInstance()->ClearTrace();
 }
 
@@ -1462,13 +1463,24 @@ TEST_P(EnvPosixTestWithParam, PosixRandomRWFileRandomized) {
   env_->DeleteFile(path);
 }
 
-INSTANTIATE_TEST_CASE_P(DefaultEnv, EnvPosixTestWithParam,
-                        ::testing::Values(Env::Default()));
+INSTANTIATE_TEST_CASE_P(DefaultEnvWithoutDirectIO, EnvPosixTestWithParam,
+                        ::testing::Values(std::pair<Env*, bool>(Env::Default(),
+                                                                false)));
+#if !defined(ROCKSDB_LITE)
+INSTANTIATE_TEST_CASE_P(DefaultEnvWithDirectIO, EnvPosixTestWithParam,
+                        ::testing::Values(std::pair<Env*, bool>(Env::Default(),
+                                                                true)));
+#endif  // !defined(ROCKSDB_LITE)
+
 #if !defined(ROCKSDB_LITE) && !defined(OS_WIN)
 static unique_ptr<Env> chroot_env(NewChrootEnv(Env::Default(),
                                                test::TmpDir(Env::Default())));
-INSTANTIATE_TEST_CASE_P(ChrootEnv, EnvPosixTestWithParam,
-                        ::testing::Values(chroot_env.get()));
+INSTANTIATE_TEST_CASE_P(
+    ChrootEnvWithoutDirectIO, EnvPosixTestWithParam,
+    ::testing::Values(std::pair<Env*, bool>(chroot_env.get(), false)));
+INSTANTIATE_TEST_CASE_P(
+    ChrootEnvWithDirectIO, EnvPosixTestWithParam,
+    ::testing::Values(std::pair<Env*, bool>(chroot_env.get(), true)));
 #endif  // !defined(ROCKSDB_LITE) && !defined(OS_WIN)
 
 }  // namespace rocksdb

util/file_reader_writer.cc

@@ -24,6 +24,7 @@ namespace rocksdb {
 Status SequentialFileReader::Read(size_t n, Slice* result, char* scratch) {
   Status s;
   if (use_direct_io()) {
+#ifndef ROCKSDB_LITE
     size_t offset = offset_.fetch_add(n);
     size_t alignment = file_->GetRequiredBufferAlignment();
     size_t aligned_offset = TruncateToPageBoundary(alignment, offset);
@@ -41,6 +42,7 @@ Status SequentialFileReader::Read(size_t n, Slice* result, char* scratch) {
                    std::min(tmp.size() - offset_advance, n));
     }
     *result = Slice(scratch, r);
+#endif  // !ROCKSDB_LITE
   } else {
     s = file_->Read(n, result, scratch);
   }
@@ -48,37 +50,15 @@ Status SequentialFileReader::Read(size_t n, Slice* result, char* scratch) {
   return s;
 }
 
-Status SequentialFileReader::DirectRead(size_t n, Slice* result,
-                                        char* scratch) {
-  size_t offset = offset_.fetch_add(n);
-  size_t alignment = file_->GetRequiredBufferAlignment();
-  size_t aligned_offset = TruncateToPageBoundary(alignment, offset);
-  size_t offset_advance = offset - aligned_offset;
-  size_t size = Roundup(offset + n, alignment) - aligned_offset;
-  AlignedBuffer buf;
-  buf.Alignment(alignment);
-  buf.AllocateNewBuffer(size);
-  Slice tmp;
-  Status s =
-      file_->PositionedRead(aligned_offset, size, &tmp, buf.BufferStart());
-  if (s.ok()) {
-    buf.Size(tmp.size());
-    size_t r = buf.Read(scratch, offset_advance,
-                        tmp.size() <= offset_advance
-                            ? 0
-                            : std::min(tmp.size() - offset_advance, n));
-    *result = Slice(scratch, r);
-  }
-  return s;
-}
 
 Status SequentialFileReader::Skip(uint64_t n) {
+#ifndef ROCKSDB_LITE
   if (use_direct_io()) {
     offset_ += n;
     return Status::OK();
-  } else {
-    return file_->Skip(n);
   }
+#endif  // !ROCKSDB_LITE
+  return file_->Skip(n);
 }
 
 Status RandomAccessFileReader::Read(uint64_t offset, size_t n, Slice* result,
@@ -90,6 +70,7 @@ Status RandomAccessFileReader::Read(uint64_t offset, size_t n, Slice* result,
                  (stats_ != nullptr) ? &elapsed : nullptr);
     IOSTATS_TIMER_GUARD(read_nanos);
     if (use_direct_io()) {
+#ifndef ROCKSDB_LITE
       size_t alignment = file_->GetRequiredBufferAlignment();
       size_t aligned_offset = TruncateToPageBoundary(alignment, offset);
       size_t offset_advance = offset - aligned_offset;
@@ -106,6 +87,7 @@ Status RandomAccessFileReader::Read(uint64_t offset, size_t n, Slice* result,
                             std::min(tmp.size() - offset_advance, n));
       }
       *result = Slice(scratch, r);
+#endif  // !ROCKSDB_LITE
     } else {
       s = file_->Read(offset, n, result, scratch);
     }
@@ -117,28 +99,6 @@ Status RandomAccessFileReader::Read(uint64_t offset, size_t n, Slice* result,
   return s;
 }
 
-Status RandomAccessFileReader::DirectRead(uint64_t offset, size_t n,
-                                          Slice* result, char* scratch) const {
-  size_t alignment = file_->GetRequiredBufferAlignment();
-  size_t aligned_offset = TruncateToPageBoundary(alignment, offset);
-  size_t offset_advance = offset - aligned_offset;
-  size_t size = Roundup(offset + n, alignment) - aligned_offset;
-  AlignedBuffer buf;
-  buf.Alignment(alignment);
-  buf.AllocateNewBuffer(size);
-  Slice tmp;
-  Status s = file_->Read(aligned_offset, size, &tmp, buf.BufferStart());
-  if (s.ok()) {
-    buf.Size(tmp.size());
-    size_t r = buf.Read(scratch, offset_advance,
-                        tmp.size() <= offset_advance
-                            ? 0
-                            : std::min(tmp.size() - offset_advance, n));
-    *result = Slice(scratch, r);
-  }
-  return s;
-}
-
 Status WritableFileWriter::Append(const Slice& data) {
   const char* src = data.data();
   size_t left = data.size();
@@ -252,7 +212,9 @@ Status WritableFileWriter::Flush() {
 
   if (buf_.CurrentSize() > 0) {
     if (direct_io_) {
+#ifndef ROCKSDB_LITE
       s = WriteDirect();
+#endif  // !ROCKSDB_LITE
     } else {
       s = WriteBuffered(buf_.BufferStart(), buf_.CurrentSize());
     }
@@ -401,6 +363,7 @@ Status WritableFileWriter::WriteBuffered(const char* data, size_t size) {
 // whole number of pages to be written again on the next flush because we can
 // only write on aligned
 // offsets.
+#ifndef ROCKSDB_LITE
 Status WritableFileWriter::WriteDirect() {
   Status s;
 
@@ -460,7 +423,7 @@ Status WritableFileWriter::WriteDirect() {
   }
   return s;
 }
-
+#endif  // !ROCKSDB_LITE
 
 namespace {
 class ReadaheadRandomAccessFile : public RandomAccessFile {

util/file_reader_writer.h

@@ -170,7 +170,9 @@ class WritableFileWriter {
  private:
   // Used when os buffering is OFF and we are writing
   // DMA such as in Direct I/O mode
+#ifndef ROCKSDB_LITE
   Status WriteDirect();
+#endif  // !ROCKSDB_LITE
   // Normal write
   Status WriteBuffered(const char* data, size_t size);
   Status RangeSync(uint64_t offset, uint64_t nbytes);

util/file_reader_writer_test.cc

@@ -85,6 +85,7 @@ TEST_F(WritableFileWriterTest, RangeSync) {
   writer->Close();
 }
 
+#ifndef ROCKSDB_LITE
 TEST_F(WritableFileWriterTest, AppendStatusReturn) {
   class FakeWF : public WritableFile {
    public:
@@ -124,6 +125,7 @@ TEST_F(WritableFileWriterTest, AppendStatusReturn) {
   dynamic_cast<FakeWF*>(writer->writable_file())->SetIOError(true);
   ASSERT_NOK(writer->Append(std::string(2 * kMb, 'b')));
 }
+#endif
 
 }  // namespace rocksdb