From 0e4d1ba1f45a2b8cbca0e4ca5a7a20118ddef9af Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Tue, 17 Mar 2026 21:40:28 -0700
Subject: [PATCH] Sync .ecx file before close matching Go's EcVolume.Close

Go calls ev.ecxFile.Sync() before closing to ensure in-place deletion
marks are flushed to disk. Without this, deletion marks written via
MarkNeedleDeleted could be lost on crash.
---
 seaweed-volume/src/storage/erasure_coding/ec_volume.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/seaweed-volume/src/storage/erasure_coding/ec_volume.rs b/seaweed-volume/src/storage/erasure_coding/ec_volume.rs
index 019f69cef..a746beca3 100644
--- a/seaweed-volume/src/storage/erasure_coding/ec_volume.rs
+++ b/seaweed-volume/src/storage/erasure_coding/ec_volume.rs
@@ -749,6 +749,10 @@ impl EcVolume {
             }
             *shard = None;
         }
+        // Sync .ecx before closing to flush in-place deletion marks (matches Go's ev.ecxFile.Sync())
+        if let Some(ref ecx_file) = self.ecx_file {
+            let _ = ecx_file.sync_all();
+        }
         self.ecx_file = None;
         self.ecj_file = None;
     }