updated c ingestexternalfileoptions for ingest behind

Summary: Closes https://github.com/facebook/rocksdb/pull/3151

Differential Revision: D6293861

Pulled By: ajkr

fbshipit-source-id: f8db0a71509d1cd8237f2d377bf9e1bb0464bdbf

db/c.cc

@@ -2962,6 +2962,12 @@ void rocksdb_ingestexternalfileoptions_set_allow_blocking_flush(
   opt->rep.allow_blocking_flush = allow_blocking_flush;
 }
 
+void rocksdb_ingestexternalfileoptions_set_ingest_behind(
+    rocksdb_ingestexternalfileoptions_t* opt,
+    unsigned char ingest_behind) {
+  opt->rep.ingest_behind = ingest_behind;
+}
+
 void rocksdb_ingestexternalfileoptions_destroy(
     rocksdb_ingestexternalfileoptions_t* opt) {
   delete opt;

include/rocksdb/c.h

@@ -1169,6 +1169,10 @@ extern ROCKSDB_LIBRARY_API void
 rocksdb_ingestexternalfileoptions_set_allow_blocking_flush(
     rocksdb_ingestexternalfileoptions_t* opt,
     unsigned char allow_blocking_flush);
+extern ROCKSDB_LIBRARY_API void
+rocksdb_ingestexternalfileoptions_set_ingest_behind(
+    rocksdb_ingestexternalfileoptions_t* opt,
+    unsigned char ingest_behind);
 extern ROCKSDB_LIBRARY_API void rocksdb_ingestexternalfileoptions_destroy(
     rocksdb_ingestexternalfileoptions_t* opt);