From b305a7670bb88712ae9e0c1d3fe48f49d38b1b76 Mon Sep 17 00:00:00 2001
From: Anatol Belski <anbelski@linux.microsoft.com>
Date: Thu, 12 Mar 2026 20:58:26 +0100
Subject: [PATCH] block: qcow_sync: impl DiskFd for QcowDiskSync

Borrows the raw file descriptor from the underlying QcowRawFile
for fcntl() operations. Uses &self for shared access.

Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
---
 block/src/qcow_sync.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/block/src/qcow_sync.rs b/block/src/qcow_sync.rs
index 3ff5a6472..a2898a49b 100644
--- a/block/src/qcow_sync.rs
+++ b/block/src/qcow_sync.rs
@@ -290,6 +290,12 @@ impl disk_file::PhysicalSize for QcowDiskSync {
     }
 }
 
+impl disk_file::DiskFd for QcowDiskSync {
+    fn fd(&self) -> BorrowedDiskFd<'_> {
+        BorrowedDiskFd::new(self.data_raw_file.as_fd().as_raw_fd())
+    }
+}
+
 pub struct QcowSync {
     metadata: Arc<QcowMetadata>,
     data_file: QcowRawFile,