Fix NewRandomRWFile and ReuseWritableFile in KeyManagedEncryptedEnv (f…

…acebook#167) (facebook#168) Summary: Fix NewRandomRWFile and ReuseWritableFile misuse of `GetFile()` and `NewFile()`. See inline comments. Test Plan: manual test with tikv Signed-off-by: Yi Wu <[email protected]>
Little-Wallace · Apr 20, 2020 · e61028d · e61028d
1 parent 24bf91d
commit e61028d
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/encryption/encryption.cc b/encryption/encryption.cc
@@ -352,7 +352,10 @@ Status KeyManagedEncryptedEnv::ReuseWritableFile(
     const std::string& fname, const std::string& old_fname,
     std::unique_ptr<WritableFile>* result, const EnvOptions& options) {
   FileEncryptionInfo file_info;
-  Status s = key_manager_->GetFile(fname, &file_info);
+  // ReuseWritableFile is only used in the context of rotating WAL file and
+  // reuse them. Old content is discardable and new WAL records are to
+  // overwrite the file. So NewFile() should be called.
+  Status s = key_manager_->NewFile(fname, &file_info);
   if (!s.ok()) {
     return s;
   }
@@ -379,7 +382,10 @@ Status KeyManagedEncryptedEnv::NewRandomRWFile(
     const std::string& fname, std::unique_ptr<RandomRWFile>* result,
     const EnvOptions& options) {
   FileEncryptionInfo file_info;
-  Status s = key_manager_->NewFile(fname, &file_info);
+  // NewRandomRWFile is only used in the context of external file ingestion,
+  // for rewriting global seqno. So it should call GetFile() instead of
+  // NewFile().
+  Status s = key_manager_->GetFile(fname, &file_info);
   if (!s.ok()) {
     return s;
   }