Bug fix and test BuildDBOptions (#13038)

Summary:
The following DBOptions were not being propagated through BuildDBOptions, which could at least lead to settings being lost through `GetOptionsFromString()`, possibly elsewhere as well:
* background_close_inactive_wals
* write_dbid_to_manifest
* write_identity_file
* prefix_seek_opt_in_only

Pull Request resolved: https://github.com/facebook/rocksdb/pull/13038

Test Plan:
This problem was not being caught by
OptionsSettableTest.DBOptionsAllFieldsSettable when the option was omitted from both options_helper.cc and options_settable_test.cc. I have added to the test to catch future instances (and the updated test was how I found three of the four missing options).

The same kind of bug seems to be caught by
ColumnFamilyOptionsAllFieldsSettable, and AFAIK analogous code does not exist for BlockBasedTableOptions.

Reviewed By: ltamasi

Differential Revision: D63483779

Pulled By: pdillinger

fbshipit-source-id: a5d5f6e434174bacb8e5d251b767e81e62b7225a

options/options_helper.cc

@@ -55,7 +55,13 @@ Status ValidateOptions(const DBOptions& db_opts,
 DBOptions BuildDBOptions(const ImmutableDBOptions& immutable_db_options,
                          const MutableDBOptions& mutable_db_options) {
   DBOptions options;
+  BuildDBOptions(immutable_db_options, mutable_db_options, options);
+  return options;
+}
 
+void BuildDBOptions(const ImmutableDBOptions& immutable_db_options,
+                    const MutableDBOptions& mutable_db_options,
+                    DBOptions& options) {
   options.create_if_missing = immutable_db_options.create_if_missing;
   options.create_missing_column_families =
       immutable_db_options.create_missing_column_families;
@@ -88,9 +94,6 @@ DBOptions BuildDBOptions(const ImmutableDBOptions& immutable_db_options,
   options.max_background_jobs = mutable_db_options.max_background_jobs;
   options.max_background_compactions =
       mutable_db_options.max_background_compactions;
-  options.bytes_per_sync = mutable_db_options.bytes_per_sync;
-  options.wal_bytes_per_sync = mutable_db_options.wal_bytes_per_sync;
-  options.strict_bytes_per_sync = mutable_db_options.strict_bytes_per_sync;
   options.max_subcompactions = mutable_db_options.max_subcompactions;
   options.max_background_flushes = mutable_db_options.max_background_flushes;
   options.max_log_file_size = immutable_db_options.max_log_file_size;
@@ -127,6 +130,9 @@ DBOptions BuildDBOptions(const ImmutableDBOptions& immutable_db_options,
   options.writable_file_max_buffer_size =
       mutable_db_options.writable_file_max_buffer_size;
   options.use_adaptive_mutex = immutable_db_options.use_adaptive_mutex;
+  options.bytes_per_sync = mutable_db_options.bytes_per_sync;
+  options.wal_bytes_per_sync = mutable_db_options.wal_bytes_per_sync;
+  options.strict_bytes_per_sync = mutable_db_options.strict_bytes_per_sync;
   options.listeners = immutable_db_options.listeners;
   options.enable_thread_tracking = immutable_db_options.enable_thread_tracking;
   options.delayed_write_rate = mutable_db_options.delayed_write_rate;
@@ -161,9 +167,15 @@ DBOptions BuildDBOptions(const ImmutableDBOptions& immutable_db_options,
   options.two_write_queues = immutable_db_options.two_write_queues;
   options.manual_wal_flush = immutable_db_options.manual_wal_flush;
   options.wal_compression = immutable_db_options.wal_compression;
+  options.background_close_inactive_wals =
+      immutable_db_options.background_close_inactive_wals;
   options.atomic_flush = immutable_db_options.atomic_flush;
   options.avoid_unnecessary_blocking_io =
       immutable_db_options.avoid_unnecessary_blocking_io;
+  options.write_dbid_to_manifest = immutable_db_options.write_dbid_to_manifest;
+  options.write_identity_file = immutable_db_options.write_identity_file;
+  options.prefix_seek_opt_in_only =
+      immutable_db_options.prefix_seek_opt_in_only;
   options.log_readahead_size = immutable_db_options.log_readahead_size;
   options.file_checksum_gen_factory =
       immutable_db_options.file_checksum_gen_factory;
@@ -189,7 +201,6 @@ DBOptions BuildDBOptions(const ImmutableDBOptions& immutable_db_options,
   options.metadata_write_temperature =
       immutable_db_options.metadata_write_temperature;
   options.wal_write_temperature = immutable_db_options.wal_write_temperature;
-  return options;
 }
 
 ColumnFamilyOptions BuildColumnFamilyOptions(

options/options_helper.h

@@ -44,6 +44,10 @@ Status ValidateOptions(const DBOptions& db_opts,
 
 DBOptions BuildDBOptions(const ImmutableDBOptions& immutable_db_options,
                          const MutableDBOptions& mutable_db_options);
+// Overwrites `options`
+void BuildDBOptions(const ImmutableDBOptions& immutable_db_options,
+                    const MutableDBOptions& mutable_db_options,
+                    DBOptions& options);
 
 ColumnFamilyOptions BuildColumnFamilyOptions(
     const ColumnFamilyOptions& ioptions,

options/options_settable_test.cc

@@ -271,6 +271,12 @@ TEST_F(OptionsSettableTest, DBOptionsAllFieldsSettable) {
   ASSERT_GT(unset_bytes_base, 0);
   options->~DBOptions();
 
+  // Now also check that BuildDBOptions populates everything
+  FillWithSpecialChar(options_ptr, sizeof(DBOptions), kDBOptionsExcluded);
+  BuildDBOptions({}, {}, *options);
+  ASSERT_EQ(unset_bytes_base,
+            NumUnsetBytes(options_ptr, sizeof(DBOptions), kDBOptionsExcluded));
+
   options = new (options_ptr) DBOptions();
   FillWithSpecialChar(options_ptr, sizeof(DBOptions), kDBOptionsExcluded);
 
@@ -372,7 +378,11 @@ TEST_F(OptionsSettableTest, DBOptionsAllFieldsSettable) {
                              "follower_catchup_retry_count=456;"
                              "follower_catchup_retry_wait_ms=789;"
                              "metadata_write_temperature=kCold;"
-                             "wal_write_temperature=kHot;",
+                             "wal_write_temperature=kHot;"
+                             "background_close_inactive_wals=true;"
+                             "write_dbid_to_manifest=true;"
+                             "write_identity_file=true;"
+                             "prefix_seek_opt_in_only=true;",
                              new_options));
 
   ASSERT_EQ(unset_bytes_base, NumUnsetBytes(new_options_ptr, sizeof(DBOptions),

unreleased_history/bug_fixes/build_db_options.md

@@ -0,0 +1 @@
+* Several DB option settings could be lost through `GetOptionsFromString()`, possibly elsewhere as well. Affected options, now fixed:`background_close_inactive_wals`, `write_dbid_to_manifest`, `write_identity_file`, `prefix_seek_opt_in_only`