Validate option `memtable_protection_bytes_per_key` (#10621)

Summary:
sanity check value for option `memtable_protection_bytes_per_key` in `ColumnFamilyData::ValidateOptions()`.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/10621

Test Plan: `make check`, added unit test in ColumnFamilyTest.

Reviewed By: ajkr

Differential Revision: D39180133

Pulled By: cbi42

fbshipit-source-id: 009e0da3ccb332d1c9e14d20193304610bd4eb8a

db/column_family.cc

@@ -1415,6 +1415,14 @@ Status ColumnFamilyData::ValidateOptions(
         "FIFO compaction only supported with max_open_files = -1.");
   }
 
+  std::vector<uint32_t> supported{0, 1, 2, 4, 8};
+  if (std::find(supported.begin(), supported.end(),
+                cf_options.memtable_protection_bytes_per_key) ==
+      supported.end()) {
+    return Status::NotSupported(
+        "Memtable per key-value checksum protection only supports 0, 1, 2, 4 "
+        "or 8 bytes per key.");
+  }
   return s;
 }
 

db/column_family_test.cc

@@ -3433,6 +3433,27 @@ TEST(ColumnFamilyTest, ValidateBlobGCForceThreshold) {
                   .IsInvalidArgument());
 }
 
+TEST(ColumnFamilyTest, ValidateMemtableKVChecksumOption) {
+  DBOptions db_options;
+
+  ColumnFamilyOptions cf_options;
+  ASSERT_OK(ColumnFamilyData::ValidateOptions(db_options, cf_options));
+
+  cf_options.memtable_protection_bytes_per_key = 5;
+  ASSERT_TRUE(ColumnFamilyData::ValidateOptions(db_options, cf_options)
+                  .IsNotSupported());
+
+  cf_options.memtable_protection_bytes_per_key = 1;
+  ASSERT_OK(ColumnFamilyData::ValidateOptions(db_options, cf_options));
+
+  cf_options.memtable_protection_bytes_per_key = 16;
+  ASSERT_TRUE(ColumnFamilyData::ValidateOptions(db_options, cf_options)
+                  .IsNotSupported());
+
+  cf_options.memtable_protection_bytes_per_key = 0;
+  ASSERT_OK(ColumnFamilyData::ValidateOptions(db_options, cf_options));
+}
+
 }  // namespace ROCKSDB_NAMESPACE
 
 int main(int argc, char** argv) {