Make auto_heal real: peer-fetch corrupted_object with verified swap, poison-fallback on no peer

crates/myfsio-common/src/error.rs

@@ -29,6 +29,7 @@ pub enum S3ErrorCode {
     NoSuchUpload,
     NoSuchVersion,
     NoSuchTagSet,
+    ObjectCorrupted,
     PreconditionFailed,
     NotModified,
     QuotaExceeded,
@@ -68,6 +69,7 @@ impl S3ErrorCode {
             Self::NoSuchUpload => 404,
             Self::NoSuchVersion => 404,
             Self::NoSuchTagSet => 404,
+            Self::ObjectCorrupted => 500,
             Self::PreconditionFailed => 412,
             Self::NotModified => 304,
             Self::QuotaExceeded => 403,
@@ -107,6 +109,7 @@ impl S3ErrorCode {
             Self::NoSuchUpload => "NoSuchUpload",
             Self::NoSuchVersion => "NoSuchVersion",
             Self::NoSuchTagSet => "NoSuchTagSet",
+            Self::ObjectCorrupted => "ObjectCorrupted",
             Self::PreconditionFailed => "PreconditionFailed",
             Self::NotModified => "NotModified",
             Self::QuotaExceeded => "QuotaExceeded",
@@ -148,6 +151,7 @@ impl S3ErrorCode {
             Self::NoSuchUpload => "The specified multipart upload does not exist",
             Self::NoSuchVersion => "The specified version does not exist",
             Self::NoSuchTagSet => "The TagSet does not exist",
+            Self::ObjectCorrupted => "The stored object is corrupted and cannot be served",
             Self::PreconditionFailed => "At least one of the preconditions you specified did not hold",
             Self::NotModified => "Not Modified",
             Self::QuotaExceeded => "The bucket quota has been exceeded",