From 02a3813a6a4f9c8ce14f64fc7f378030e7ea6f93 Mon Sep 17 00:00:00 2001
From: Jason Dillaman <dillaman@redhat.com>
Date: Mon, 27 Apr 2015 01:03:52 -0400
Subject: [PATCH] librbd: flatten should return -EROFS if image is read-only

Fixes: #11475
Signed-off-by: Jason Dillaman <dillaman@redhat.com>
(cherry picked from commit f141e02ab719df830648318f4c1d9ca286071ed3)
---
 src/librbd/internal.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/librbd/internal.cc b/src/librbd/internal.cc
index ba494f96fbcb7..ba6722dc613f6 100644
--- a/src/librbd/internal.cc
+++ b/src/librbd/internal.cc
@@ -2518,6 +2518,10 @@ reprotect_and_return_err:
       return r;
     }
 
+    if (ictx->read_only) {
+      return -EROFS;
+    }
+
     {
       RWLock::RLocker parent_locker(ictx->parent_lock);
       if (ictx->parent_md.spec.pool_id == -1) {
-- 
2.39.5