diff --git a/db/external_sst_file_ingestion_job.cc b/db/external_sst_file_ingestion_job.cc
index 56fd1ffaf..1913a211a 100644
--- a/db/external_sst_file_ingestion_job.cc
+++ b/db/external_sst_file_ingestion_job.cc
@@ -192,10 +192,13 @@ Status ExternalSstFileIngestionJob::Prepare(
     // Step 1: generate the checksum for ingested sst file.
     if (need_generate_file_checksum_) {
       for (size_t i = 0; i < files_to_ingest_.size(); i++) {
-        std::string generated_checksum, generated_checksum_func_name;
+        std::string generated_checksum;
+        std::string generated_checksum_func_name;
+        std::string requested_checksum_func_name;
         IOStatus io_s = GenerateOneFileChecksum(
             fs_.get(), files_to_ingest_[i].internal_file_path,
-            db_options_.file_checksum_gen_factory.get(), &generated_checksum,
+            db_options_.file_checksum_gen_factory.get(),
+            requested_checksum_func_name, &generated_checksum,
             &generated_checksum_func_name,
             ingestion_options_.verify_checksums_readahead_size,
             db_options_.allow_mmap_reads, io_tracer_);
@@ -839,11 +842,13 @@ IOStatus ExternalSstFileIngestionJob::GenerateChecksumForIngestedFile(
     // file checksum generated during Prepare(). This step will be skipped.
     return IOStatus::OK();
   }
-  std::string file_checksum, file_checksum_func_name;
+  std::string file_checksum;
+  std::string file_checksum_func_name;
+  std::string requested_checksum_func_name;
   IOStatus io_s = GenerateOneFileChecksum(
       fs_.get(), file_to_ingest->internal_file_path,
-      db_options_.file_checksum_gen_factory.get(), &file_checksum,
-      &file_checksum_func_name,
+      db_options_.file_checksum_gen_factory.get(), requested_checksum_func_name,
+      &file_checksum, &file_checksum_func_name,
       ingestion_options_.verify_checksums_readahead_size,
       db_options_.allow_mmap_reads, io_tracer_);
   if (!io_s.ok()) {
diff --git a/file/file_util.cc b/file/file_util.cc
index 2d487dcc4..0e6f4a514 100644
--- a/file/file_util.cc
+++ b/file/file_util.cc
@@ -123,13 +123,16 @@ bool IsWalDirSameAsDBPath(const ImmutableDBOptions* db_options) {
   return same;
 }
 
-IOStatus GenerateOneFileChecksum(FileSystem* fs, const std::string& file_path,
-                                 FileChecksumGenFactory* checksum_factory,
-                                 std::string* file_checksum,
-                                 std::string* file_checksum_func_name,
-                                 size_t verify_checksums_readahead_size,
-                                 bool allow_mmap_reads,
-                                 std::shared_ptr<IOTracer>& io_tracer) {
+// requested_checksum_func_name brings the function name of the checksum
+// generator in checksum_factory. Checksum factories may use or ignore
+// requested_checksum_func_name.
+IOStatus GenerateOneFileChecksum(
+    FileSystem* fs, const std::string& file_path,
+    FileChecksumGenFactory* checksum_factory,
+    const std::string& requested_checksum_func_name, std::string* file_checksum,
+    std::string* file_checksum_func_name,
+    size_t verify_checksums_readahead_size, bool allow_mmap_reads,
+    std::shared_ptr<IOTracer>& io_tracer) {
   if (checksum_factory == nullptr) {
     return IOStatus::InvalidArgument("Checksum factory is invalid");
   }
@@ -137,8 +140,25 @@ IOStatus GenerateOneFileChecksum(FileSystem* fs, const std::string& file_path,
   assert(file_checksum_func_name != nullptr);
 
   FileChecksumGenContext gen_context;
+  gen_context.requested_checksum_func_name = requested_checksum_func_name;
+  gen_context.file_name = file_path;
   std::unique_ptr<FileChecksumGenerator> checksum_generator =
       checksum_factory->CreateFileChecksumGenerator(gen_context);
+  if (checksum_generator == nullptr) {
+    std::string msg =
+        "Cannot get the file checksum generator based on the requested "
+        "checksum function name: " +
+        requested_checksum_func_name +
+        " from checksum factory: " + checksum_factory->Name();
+    return IOStatus::InvalidArgument(msg);
+  }
+
+  // For backward compatable, requested_checksum_func_name can be empty.
+  // If we give the requested checksum function name, we expect it is the
+  // same name of the checksum generator.
+  assert(!checksum_generator || requested_checksum_func_name.empty() ||
+         requested_checksum_func_name == checksum_generator->Name());
+
   uint64_t size;
   IOStatus io_s;
   std::unique_ptr<RandomAccessFileReader> reader;
diff --git a/file/file_util.h b/file/file_util.h
index 9aa86ebda..a9b0a9509 100644
--- a/file/file_util.h
+++ b/file/file_util.h
@@ -35,7 +35,8 @@ extern bool IsWalDirSameAsDBPath(const ImmutableDBOptions* db_options);
 
 extern IOStatus GenerateOneFileChecksum(
     FileSystem* fs, const std::string& file_path,
-    FileChecksumGenFactory* checksum_factory, std::string* file_checksum,
+    FileChecksumGenFactory* checksum_factory,
+    const std::string& requested_checksum_func_name, std::string* file_checksum,
     std::string* file_checksum_func_name,
     size_t verify_checksums_readahead_size, bool allow_mmap_reads,
     std::shared_ptr<IOTracer>& io_tracer);