init bucketmeta

ecstore/src/bucket/policy/effect.rs

@@ -0,0 +1,21 @@
+use std::str::FromStr;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
+pub enum Effect {
+    #[default]
+    Allow,
+    Deny,
+}
+
+// 实现从字符串解析Effect的功能
+impl FromStr for Effect {
+    type Err = ();
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            "Allow" => Ok(Effect::Allow),
+            "Deny" => Ok(Effect::Deny),
+            _ => Err(()),
+        }
+    }
+}