1 files changed, 39 insertions, 0 deletions
diff --git a/src/rocksdb/table/table_reader_caller.h b/src/rocksdb/table/table_reader_caller.h
new file mode 100644
index 000000000..7a57b5e98
--- /dev/null
+++ b/src/rocksdb/table/table_reader_caller.h
@@ -0,0 +1,39 @@
+//  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under both the GPLv2 (found in the
+//  COPYING file in the root directory) and Apache 2.0 License
+//  (found in the LICENSE.Apache file in the root directory).
+
+#pragma once
+
+namespace ROCKSDB_NAMESPACE {
+// A list of callers for a table reader. It is used to trace the caller that
+// accesses on a block. This is only used for block cache tracing and analysis.
+// A user may use kUncategorized if the caller is not interesting for analysis
+// or the table reader is called in the test environment, e.g., unit test, table
+// reader benchmark, etc.
+enum TableReaderCaller : char {
+  kUserGet = 1,
+  kUserMultiGet = 2,
+  kUserIterator = 3,
+  kUserApproximateSize = 4,
+  kUserVerifyChecksum = 5,
+  kSSTDumpTool = 6,
+  kExternalSSTIngestion = 7,
+  kRepair = 8,
+  kPrefetch = 9,
+  kCompaction = 10,
+  // A compaction job may refill the block cache with blocks in the new SST
+  // files if paranoid_file_checks is true.
+  kCompactionRefill = 11,
+  // After building a table, it may load all its blocks into the block cache if
+  // paranoid_file_checks is true.
+  kFlush = 12,
+  // sst_file_reader.
+  kSSTFileReader = 13,
+  // A list of callers that are either not interesting for analysis or are
+  // calling from a test environment, e.g., unit test, benchmark, etc.
+  kUncategorized = 14,
+  // All callers should be added before kMaxBlockCacheLookupCaller.
+  kMaxBlockCacheLookupCaller
+};
+}  // namespace ROCKSDB_NAMESPACE