add flush_before_backup parameter to c api rocksdb_backup_engine_create_new_backup

Summary:
Add flush_before_backup to rocksdb_backup_engine_create_new_backup. make c api able to control the flush before backup behavior.
Closes https://github.com/facebook/rocksdb/pull/3897

Differential Revision: D8157676

Pulled By: ajkr

fbshipit-source-id: 88998c62f89f087bf8672398fd7ddafabbada505

db/c.cc

@@ -90,6 +90,7 @@ using rocksdb::LiveFileMetaData;
 using rocksdb::BackupEngine;
 using rocksdb::BackupableDBOptions;
 using rocksdb::BackupInfo;
+using rocksdb::BackupID;
 using rocksdb::RestoreOptions;
 using rocksdb::CompactRangeOptions;
 using rocksdb::RateLimiter;
@@ -531,10 +532,18 @@ rocksdb_backup_engine_t* rocksdb_backup_engine_open(
 }
 
 void rocksdb_backup_engine_create_new_backup(rocksdb_backup_engine_t* be,
-                                             rocksdb_t* db, char** errptr) {
+                                             rocksdb_t* db,
+                                             char** errptr) {
   SaveError(errptr, be->rep->CreateNewBackup(db->rep));
 }
 
+void rocksdb_backup_engine_create_new_backup_flush(rocksdb_backup_engine_t* be,
+                                                   rocksdb_t* db,
+                                                   unsigned char flush_before_backup,
+                                                   char** errptr) {
+  SaveError(errptr, be->rep->CreateNewBackup(db->rep, flush_before_backup));
+}
+
 void rocksdb_backup_engine_purge_old_backups(rocksdb_backup_engine_t* be,
                                              uint32_t num_backups_to_keep,
                                              char** errptr) {
@@ -554,6 +563,12 @@ void rocksdb_restore_options_set_keep_log_files(rocksdb_restore_options_t* opt,
   opt->rep.keep_log_files = v;
 }
 
+
+void rocksdb_backup_engine_verify_backup(rocksdb_backup_engine_t* be,
+    uint32_t backup_id, char** errptr) {
+  SaveError(errptr, be->rep->VerifyBackup(static_cast<BackupID>(backup_id)));
+}
+
 void rocksdb_backup_engine_restore_db_from_latest_backup(
     rocksdb_backup_engine_t* be, const char* db_dir, const char* wal_dir,
     const rocksdb_restore_options_t* restore_options, char** errptr) {

include/rocksdb/c.h

@@ -145,6 +145,10 @@ extern ROCKSDB_LIBRARY_API rocksdb_backup_engine_t* rocksdb_backup_engine_open(
 extern ROCKSDB_LIBRARY_API void rocksdb_backup_engine_create_new_backup(
     rocksdb_backup_engine_t* be, rocksdb_t* db, char** errptr);
 
+extern ROCKSDB_LIBRARY_API void rocksdb_backup_engine_create_new_backup_flush(
+    rocksdb_backup_engine_t* be, rocksdb_t* db, unsigned char flush_before_backup,
+    char** errptr);
+
 extern ROCKSDB_LIBRARY_API void rocksdb_backup_engine_purge_old_backups(
     rocksdb_backup_engine_t* be, uint32_t num_backups_to_keep, char** errptr);
 
@@ -155,6 +159,10 @@ extern ROCKSDB_LIBRARY_API void rocksdb_restore_options_destroy(
 extern ROCKSDB_LIBRARY_API void rocksdb_restore_options_set_keep_log_files(
     rocksdb_restore_options_t* opt, int v);
 
+extern ROCKSDB_LIBRARY_API void
+rocksdb_backup_engine_verify_backup(rocksdb_backup_engine_t* be,
+    uint32_t backup_id, char** errptr);
+
 extern ROCKSDB_LIBRARY_API void
 rocksdb_backup_engine_restore_db_from_latest_backup(
     rocksdb_backup_engine_t* be, const char* db_dir, const char* wal_dir,