Fix FileStorageInfo fields from GetLiveFilesMetaData (#9769)

Summary:
In making `SstFileMetaData` inherit from `FileStorageInfo`, I
overlooked setting some `FileStorageInfo` fields when then default
`SstFileMetaData()` ctor is used. This affected `GetLiveFilesMetaData()`.

Also removed some buggy `static_cast<size_t>`

Pull Request resolved: https://github.com/facebook/rocksdb/pull/9769

Test Plan: Updated tests

Reviewed By: jay-zhuang

Differential Revision: D35220383

Pulled By: pdillinger

fbshipit-source-id: 05b4ee468258dbd3699517e1124838bf405fe7f8

HISTORY.md

@@ -4,6 +4,7 @@
 * Fixed a race condition when 2PC is disabled and WAL tracking in the MANIFEST is enabled. The race condition is between two background flush threads trying to install flush results, causing a WAL deletion not tracked in the MANIFEST. A future DB open may fail.
 * Fixed a heap use-after-free race with DropColumnFamily.
 * Fixed a bug that `rocksdb.read.block.compaction.micros` cannot track compaction stats (#9722).
+* Fixed `file_type`, `relative_filename` and `directory` fields returned by `GetLiveFilesMetaData()`, which were added in inheriting from `FileStorageInfo`.
 
 ## 7.1.1 (04/07/2022)
 ### Bug Fixes

db/db_test.cc

@@ -1078,6 +1078,11 @@ void CheckColumnFamilyMeta(
       ASSERT_LE(file_meta_from_cf.file_creation_time, end_time);
       ASSERT_GE(file_meta_from_cf.oldest_ancester_time, start_time);
       ASSERT_LE(file_meta_from_cf.oldest_ancester_time, end_time);
+      // More from FileStorageInfo
+      ASSERT_EQ(file_meta_from_cf.file_type, kTableFile);
+      ASSERT_EQ(file_meta_from_cf.name,
+                "/" + file_meta_from_cf.relative_filename);
+      ASSERT_EQ(file_meta_from_cf.directory, file_meta_from_cf.db_path);
     }
 
     ASSERT_EQ(level_meta_from_cf.size, level_size);
@@ -1122,6 +1127,11 @@ void CheckLiveFilesMeta(
     ASSERT_EQ(meta.oldest_blob_file_number,
               expected_meta.oldest_blob_file_number);
 
+    // More from FileStorageInfo
+    ASSERT_EQ(meta.file_type, kTableFile);
+    ASSERT_EQ(meta.name, "/" + meta.relative_filename);
+    ASSERT_EQ(meta.directory, meta.db_path);
+
     ++i;
   }
 }

db/version_set.cc

@@ -1475,7 +1475,7 @@ void Version::GetColumnFamilyMetaData(ColumnFamilyMetaData* cf_meta) {
       const uint64_t file_number = file->fd.GetNumber();
       files.emplace_back(
           MakeTableFileName("", file_number), file_number, file_path,
-          static_cast<size_t>(file->fd.GetFileSize()), file->fd.smallest_seqno,
+          file->fd.GetFileSize(), file->fd.smallest_seqno,
           file->fd.largest_seqno, file->smallest.user_key().ToString(),
           file->largest.user_key().ToString(),
           file->stats.num_reads_sampled.load(std::memory_order_relaxed),
@@ -5893,11 +5893,13 @@ void VersionSet::GetLiveFilesMetaData(std::vector<LiveFileMetaData>* metadata) {
           assert(!cfd->ioptions()->cf_paths.empty());
           filemetadata.db_path = cfd->ioptions()->cf_paths.back().path;
         }
+        filemetadata.directory = filemetadata.db_path;
         const uint64_t file_number = file->fd.GetNumber();
         filemetadata.name = MakeTableFileName("", file_number);
+        filemetadata.relative_filename = filemetadata.name.substr(1);
         filemetadata.file_number = file_number;
         filemetadata.level = level;
-        filemetadata.size = static_cast<size_t>(file->fd.GetFileSize());
+        filemetadata.size = file->fd.GetFileSize();
         filemetadata.smallestkey = file->smallest.user_key().ToString();
         filemetadata.largestkey = file->largest.user_key().ToString();
         filemetadata.smallest_seqno = file->fd.smallest_seqno;

include/rocksdb/metadata.h

@@ -72,10 +72,10 @@ struct LiveFileStorageInfo : public FileStorageInfo {
 // The metadata that describes an SST file. (Does not need to extend
 // LiveFileStorageInfo because SST files are always immutable.)
 struct SstFileMetaData : public FileStorageInfo {
-  SstFileMetaData() {}
+  SstFileMetaData() { file_type = kTableFile; }
 
   SstFileMetaData(const std::string& _file_name, uint64_t _file_number,
-                  const std::string& _directory, size_t _size,
+                  const std::string& _directory, uint64_t _size,
                   SequenceNumber _smallest_seqno, SequenceNumber _largest_seqno,
                   const std::string& _smallestkey,
                   const std::string& _largestkey, uint64_t _num_reads_sampled,

utilities/blob_db/blob_db_impl_filesnapshot.cc

@@ -93,7 +93,7 @@ void BlobDBImpl::GetLiveFilesMetaData(std::vector<LiveFileMetaData>* metadata) {
   for (auto bfile_pair : blob_files_) {
     auto blob_file = bfile_pair.second;
     LiveFileMetaData filemetadata;
-    filemetadata.size = static_cast<size_t>(blob_file->GetFileSize());
+    filemetadata.size = blob_file->GetFileSize();
     const uint64_t file_number = blob_file->BlobFileNumber();
     // Path should be relative to db_name, but begin with slash.
     filemetadata.name = BlobFileName("", bdb_options_.blob_dir, file_number);