feat: optimize small GET read paths (#4022)

crates/ecstore/src/object_api/readers.rs

@@ -277,6 +277,7 @@ impl PutObjReader {
 pub struct GetObjectReader {
     pub stream: Box<dyn AsyncRead + Unpin + Send + Sync>,
     pub object_info: ObjectInfo,
+    pub buffered_body: Option<Bytes>,
 }
 
 #[derive(Debug, Clone, Copy)]
@@ -529,6 +530,7 @@ impl ReadPlan {
                 GetObjectReader {
                     stream: reader,
                     object_info: oi.clone(),
+                    buffered_body: None,
                 },
                 self.storage_offset,
                 self.storage_length,
@@ -582,6 +584,7 @@ impl ReadPlan {
                     GetObjectReader {
                         stream: final_reader,
                         object_info,
+                        buffered_body: None,
                     },
                     self.storage_offset,
                     self.storage_length,
@@ -682,6 +685,7 @@ impl ReadPlan {
                     GetObjectReader {
                         stream: final_reader,
                         object_info,
+                        buffered_body: None,
                     },
                     self.storage_offset,
                     self.storage_length,

crates/ecstore/src/object_api/types.rs

@@ -31,6 +31,9 @@ pub struct ObjectOptions {
     pub delete_prefix_object: bool,
     pub version_id: Option<String>,
     pub no_lock: bool,
+    /// True when an upper layer already holds the object read lock before
+    /// forwarding a no_lock read to the set layer.
+    pub metadata_cache_safe: bool,
 
     pub versioned: bool,
     pub version_suspended: bool,