add legalhold api

ecstore/src/set_disk.rs

@@ -4320,6 +4320,23 @@ impl StorageAPI for SetDisks {
             fi.metadata = Some(metadata)
         }
 
+        if let Some(mt) = &opts.eval_metadata {
+            if let Some(ref mut metadata) = fi.metadata {
+                for (k, v) in mt {
+                    metadata.insert(k.clone(), v.clone());
+                }
+                fi.metadata = Some(metadata.clone())
+            } else {
+                let mut metadata = HashMap::new();
+
+                for (k, v) in mt {
+                    metadata.insert(k.clone(), v.clone());
+                }
+
+                fi.metadata = Some(metadata)
+            }
+        }
+
         fi.mod_time = opts.mod_time;
         if let Some(ref version_id) = opts.version_id {
             fi.version_id = Uuid::parse_str(version_id).ok();

ecstore/src/store_api.rs

@@ -18,7 +18,7 @@ use uuid::Uuid;
 pub const ERASURE_ALGORITHM: &str = "rs-vandermonde";
 pub const BLOCK_SIZE_V2: usize = 1024 * 1024; // 1M
 pub const RESERVED_METADATA_PREFIX: &str = "X-Rustfs-Internal-";
-pub const RESERVED_METADATA_PREFIX_LOWER: &str = "X-Rustfs-Internal-";
+pub const RESERVED_METADATA_PREFIX_LOWER: &str = "x-rustfs-internal-";
 pub const RUSTFS_HEALING: &str = "X-Rustfs-Internal-healing";
 pub const RUSTFS_DATA_MOVE: &str = "X-Rustfs-Internal-data-mov";
 
@@ -602,6 +602,8 @@ pub struct ObjectOptions {
 
     pub replication_request: bool,
     pub delete_marker: bool,
+
+    pub eval_metadata: Option<HashMap<String, String>>,
 }
 
 // impl Default for ObjectOptions {