Expose column family id to `FlushJobInfo`

Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/4772

Differential Revision: D13428923

Pulled By: ajkr

fbshipit-source-id: e351e9c5eea97816db25429e129357a8af90712a

db/db_impl_compaction_flush.cc

@@ -479,6 +479,7 @@ void DBImpl::NotifyOnFlushBegin(ColumnFamilyData* cfd, FileMetaData* file_meta,
   mutex_.Unlock();
   {
     FlushJobInfo info;
+    info.cf_id = cfd->GetID();
     info.cf_name = cfd->GetName();
     // TODO(yhchiang): make db_paths dynamic in case flush does not
     //                 go to L0 in the future.
@@ -530,6 +531,7 @@ void DBImpl::NotifyOnFlushCompleted(ColumnFamilyData* cfd,
   mutex_.Unlock();
   {
     FlushJobInfo info;
+    info.cf_id = cfd->GetID();
     info.cf_name = cfd->GetName();
     // TODO(yhchiang): make db_paths dynamic in case flush does not
     //                 go to L0 in the future.

include/rocksdb/listener.h

@@ -154,6 +154,8 @@ struct FileOperationInfo {
 };
 
 struct FlushJobInfo {
+  // the id of the column family
+  uint32_t cf_id;
   // the name of the column family
   std::string cf_name;
   // the path to the newly created file