rgw/storage class. Don't inherit storage class for copy object.

When an object is copied, it should only be depending on data
in the request to determine the storage class, and if it is
not specified, it should default to 'STANDARD'.  In radosgw,
this means that this is another attribute (similar to encryption)
that should not be merged from the source object.

Fixes: https://tracker.ceph.com/issues/67787

Signed-off-by: Marcus Watts <[email protected]>

Author: mdw-at-linuxbox

src/rgw/rgw_op.cc

@@ -5808,6 +5808,7 @@ class RGWCOE_make_filter_pipeline : public rgw::sal::ObjectFilter {
   std::unique_ptr<RGWGetObj_Filter> cb;
   std::map<std::string, ceph::buffer::list> src_attrs;
   std::map<std::string, ceph::buffer::list> enc_attrs;
+  bufferlist requested_sc;
   bool skip_decrypt;
   DoutPrefixProvider *dpp;
   boost::optional<RGWGetObj_Decompress> decompress;
@@ -5972,6 +5973,10 @@ ldpp_dout(dpp, 0) << "TEMP: end_x=" << end_x << " obj_size=" << obj_size << dend
     // we need it to be just the requested settings
     clear_encryption_attrs(attrs);
     merge_attrs(enc_attrs, attrs);	// request & bucket encryption defaults
+    attrs.erase(RGW_ATTR_STORAGE_CLASS);	// do not inherit from source
+    if (requested_sc.length() > 0) {
+      attrs[RGW_ATTR_STORAGE_CLASS] = std::move(requested_sc);
+    }
     attrs.erase(RGW_ATTR_COMPRESSION);	// only true source: zone data
     op_ret = get_encrypt_filter(&encrypt, filter);
     if (op_ret < 0) {
@@ -6005,6 +6010,10 @@ ldpp_dout(dpp, 0) << "TEMP: end_x=" << end_x << " obj_size=" << obj_size << dend
   void set_src_attrs(std::map<std::string, ceph::buffer::list> &_src) override {
     src_attrs = filter_encryption_compression_attrs(_src, true);
     enc_attrs = filter_encryption_compression_attrs(attrs, false);
+    auto iter = attrs.find(RGW_ATTR_STORAGE_CLASS);
+    if (iter != attrs.end()) {
+      requested_sc.append(iter->second);
+    }
   };
   bool need_copy_data() override {
     return rgw_need_copy_data( src_attrs, s );