1 files changed, 276 insertions, 0 deletions
diff --git a/src/rocksdb/db/import_column_family_job.cc b/src/rocksdb/db/import_column_family_job.cc
new file mode 100644
index 000000000..15af1cf80
--- /dev/null
+++ b/src/rocksdb/db/import_column_family_job.cc
@@ -0,0 +1,276 @@
+#ifndef ROCKSDB_LITE
+
+#include "db/import_column_family_job.h"
+
+#include <algorithm>
+#include <cinttypes>
+#include <string>
+#include <vector>
+
+#include "db/version_edit.h"
+#include "file/file_util.h"
+#include "file/random_access_file_reader.h"
+#include "table/merging_iterator.h"
+#include "table/scoped_arena_iterator.h"
+#include "table/sst_file_writer_collectors.h"
+#include "table/table_builder.h"
+#include "util/stop_watch.h"
+
+namespace ROCKSDB_NAMESPACE {
+
+Status ImportColumnFamilyJob::Prepare(uint64_t next_file_number,
+                                      SuperVersion* sv) {
+  Status status;
+
+  // Read the information of files we are importing
+  for (const auto& file_metadata : metadata_) {
+    const auto file_path = file_metadata.db_path + "/" + file_metadata.name;
+    IngestedFileInfo file_to_import;
+    status = GetIngestedFileInfo(file_path, &file_to_import, sv);
+    if (!status.ok()) {
+      return status;
+    }
+    files_to_import_.push_back(file_to_import);
+  }
+
+  const auto ucmp = cfd_->internal_comparator().user_comparator();
+  auto num_files = files_to_import_.size();
+  if (num_files == 0) {
+    return Status::InvalidArgument("The list of files is empty");
+  } else if (num_files > 1) {
+    // Verify that passed files don't have overlapping ranges in any particular
+    // level.
+    int min_level = 1;  // Check for overlaps in Level 1 and above.
+    int max_level = -1;
+    for (const auto& file_metadata : metadata_) {
+      if (file_metadata.level > max_level) {
+        max_level = file_metadata.level;
+      }
+    }
+    for (int level = min_level; level <= max_level; ++level) {
+      autovector<const IngestedFileInfo*> sorted_files;
+      for (size_t i = 0; i < num_files; i++) {
+        if (metadata_[i].level == level) {
+          sorted_files.push_back(&files_to_import_[i]);
+        }
+      }
+
+      std::sort(sorted_files.begin(), sorted_files.end(),
+                [&ucmp](const IngestedFileInfo* info1,
+                        const IngestedFileInfo* info2) {
+                  return sstableKeyCompare(ucmp, info1->smallest_internal_key,
+                                           info2->smallest_internal_key) < 0;
+                });
+
+      for (size_t i = 0; i < sorted_files.size() - 1; i++) {
+        if (sstableKeyCompare(ucmp, sorted_files[i]->largest_internal_key,
+                              sorted_files[i + 1]->smallest_internal_key) >=
+            0) {
+          return Status::InvalidArgument("Files have overlapping ranges");
+        }
+      }
+    }
+  }
+
+  for (const auto& f : files_to_import_) {
+    if (f.num_entries == 0) {
+      return Status::InvalidArgument("File contain no entries");
+    }
+
+    if (!f.smallest_internal_key.Valid() || !f.largest_internal_key.Valid()) {
+      return Status::Corruption("File has corrupted keys");
+    }
+  }
+
+  // Copy/Move external files into DB
+  auto hardlink_files = import_options_.move_files;
+  for (auto& f : files_to_import_) {
+    f.fd = FileDescriptor(next_file_number++, 0, f.file_size);
+
+    const auto path_outside_db = f.external_file_path;
+    const auto path_inside_db = TableFileName(
+        cfd_->ioptions()->cf_paths, f.fd.GetNumber(), f.fd.GetPathId());
+
+    if (hardlink_files) {
+      status =
+          fs_->LinkFile(path_outside_db, path_inside_db, IOOptions(), nullptr);
+      if (status.IsNotSupported()) {
+        // Original file is on a different FS, use copy instead of hard linking
+        hardlink_files = false;
+      }
+    }
+    if (!hardlink_files) {
+      status = CopyFile(fs_, path_outside_db, path_inside_db, 0,
+                        db_options_.use_fsync);
+    }
+    if (!status.ok()) {
+      break;
+    }
+    f.copy_file = !hardlink_files;
+    f.internal_file_path = path_inside_db;
+  }
+
+  if (!status.ok()) {
+    // We failed, remove all files that we copied into the db
+    for (const auto& f : files_to_import_) {
+      if (f.internal_file_path.empty()) {
+        break;
+      }
+      const auto s =
+          fs_->DeleteFile(f.internal_file_path, IOOptions(), nullptr);
+      if (!s.ok()) {
+        ROCKS_LOG_WARN(db_options_.info_log,
+                       "AddFile() clean up for file %s failed : %s",
+                       f.internal_file_path.c_str(), s.ToString().c_str());
+      }
+    }
+  }
+
+  return status;
+}
+
+// REQUIRES: we have become the only writer by entering both write_thread_ and
+// nonmem_write_thread_
+Status ImportColumnFamilyJob::Run() {
+  Status status;
+  edit_.SetColumnFamily(cfd_->GetID());
+
+  // We use the import time as the ancester time. This is the time the data
+  // is written to the database.
+  int64_t temp_current_time = 0;
+  uint64_t oldest_ancester_time = kUnknownOldestAncesterTime;
+  uint64_t current_time = kUnknownOldestAncesterTime;
+  if (env_->GetCurrentTime(&temp_current_time).ok()) {
+    current_time = oldest_ancester_time =
+        static_cast<uint64_t>(temp_current_time);
+  }
+
+  for (size_t i = 0; i < files_to_import_.size(); ++i) {
+    const auto& f = files_to_import_[i];
+    const auto& file_metadata = metadata_[i];
+
+    edit_.AddFile(file_metadata.level, f.fd.GetNumber(), f.fd.GetPathId(),
+                  f.fd.GetFileSize(), f.smallest_internal_key,
+                  f.largest_internal_key, file_metadata.smallest_seqno,
+                  file_metadata.largest_seqno, false, kInvalidBlobFileNumber,
+                  oldest_ancester_time, current_time, kUnknownFileChecksum,
+                  kUnknownFileChecksumFuncName);
+
+    // If incoming sequence number is higher, update local sequence number.
+    if (file_metadata.largest_seqno > versions_->LastSequence()) {
+      versions_->SetLastAllocatedSequence(file_metadata.largest_seqno);
+      versions_->SetLastPublishedSequence(file_metadata.largest_seqno);
+      versions_->SetLastSequence(file_metadata.largest_seqno);
+    }
+  }
+
+  return status;
+}
+
+void ImportColumnFamilyJob::Cleanup(const Status& status) {
+  if (!status.ok()) {
+    // We failed to add files to the database remove all the files we copied.
+    for (const auto& f : files_to_import_) {
+      const auto s =
+          fs_->DeleteFile(f.internal_file_path, IOOptions(), nullptr);
+      if (!s.ok()) {
+        ROCKS_LOG_WARN(db_options_.info_log,
+                       "AddFile() clean up for file %s failed : %s",
+                       f.internal_file_path.c_str(), s.ToString().c_str());
+      }
+    }
+  } else if (status.ok() && import_options_.move_files) {
+    // The files were moved and added successfully, remove original file links
+    for (IngestedFileInfo& f : files_to_import_) {
+      const auto s =
+          fs_->DeleteFile(f.external_file_path, IOOptions(), nullptr);
+      if (!s.ok()) {
+        ROCKS_LOG_WARN(
+            db_options_.info_log,
+            "%s was added to DB successfully but failed to remove original "
+            "file link : %s",
+            f.external_file_path.c_str(), s.ToString().c_str());
+      }
+    }
+  }
+}
+
+Status ImportColumnFamilyJob::GetIngestedFileInfo(
+    const std::string& external_file, IngestedFileInfo* file_to_import,
+    SuperVersion* sv) {
+  file_to_import->external_file_path = external_file;
+
+  // Get external file size
+  Status status = fs_->GetFileSize(external_file, IOOptions(),
+                                   &file_to_import->file_size, nullptr);
+  if (!status.ok()) {
+    return status;
+  }
+
+  // Create TableReader for external file
+  std::unique_ptr<TableReader> table_reader;
+  std::unique_ptr<FSRandomAccessFile> sst_file;
+  std::unique_ptr<RandomAccessFileReader> sst_file_reader;
+
+  status = fs_->NewRandomAccessFile(external_file, env_options_,
+                                    &sst_file, nullptr);
+  if (!status.ok()) {
+    return status;
+  }
+  sst_file_reader.reset(
+      new RandomAccessFileReader(std::move(sst_file), external_file));
+
+  status = cfd_->ioptions()->table_factory->NewTableReader(
+      TableReaderOptions(*cfd_->ioptions(),
+                         sv->mutable_cf_options.prefix_extractor.get(),
+                         env_options_, cfd_->internal_comparator()),
+      std::move(sst_file_reader), file_to_import->file_size, &table_reader);
+  if (!status.ok()) {
+    return status;
+  }
+
+  // Get the external file properties
+  auto props = table_reader->GetTableProperties();
+
+  // Set original_seqno to 0.
+  file_to_import->original_seqno = 0;
+
+  // Get number of entries in table
+  file_to_import->num_entries = props->num_entries;
+
+  ParsedInternalKey key;
+  ReadOptions ro;
+  // During reading the external file we can cache blocks that we read into
+  // the block cache, if we later change the global seqno of this file, we will
+  // have block in cache that will include keys with wrong seqno.
+  // We need to disable fill_cache so that we read from the file without
+  // updating the block cache.
+  ro.fill_cache = false;
+  std::unique_ptr<InternalIterator> iter(table_reader->NewIterator(
+      ro, sv->mutable_cf_options.prefix_extractor.get(), /*arena=*/nullptr,
+      /*skip_filters=*/false, TableReaderCaller::kExternalSSTIngestion));
+
+  // Get first (smallest) key from file
+  iter->SeekToFirst();
+  if (!ParseInternalKey(iter->key(), &key)) {
+    return Status::Corruption("external file have corrupted keys");
+  }
+  file_to_import->smallest_internal_key.SetFrom(key);
+
+  // Get last (largest) key from file
+  iter->SeekToLast();
+  if (!ParseInternalKey(iter->key(), &key)) {
+    return Status::Corruption("external file have corrupted keys");
+  }
+  file_to_import->largest_internal_key.SetFrom(key);
+
+  file_to_import->cf_id = static_cast<uint32_t>(props->column_family_id);
+
+  file_to_import->table_properties = *props;
+
+  return status;
+}
+
+}  // namespace ROCKSDB_NAMESPACE
+
+#endif  // !ROCKSDB_LITE