From 8996907e0a777320b505e74754f48a1a82308166 Mon Sep 17 00:00:00 2001
From: Jianpeng Ma <jianpeng.ma@intel.com>
Date: Fri, 6 Mar 2015 15:54:07 +0800
Subject: [PATCH] osd: refuse to write a new erasure coded object with an
 offset > 0

Even if the offset is properly aligned.

http://tracker.ceph.com/issues/11507 Fixes: #11507

Signed-off-by: Jianpeng Ma <jianpeng.ma@intel.com>
Signed-off-by: Loic Dachary <ldachary@redhat.com>
(cherry picked from commit a4f1256c214ee0e7ebb91ac4ea8655f5d9642dc8)
---
 src/osd/ReplicatedPG.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/osd/ReplicatedPG.cc b/src/osd/ReplicatedPG.cc
index 479664fef5770..37b2f51ad8208 100644
--- a/src/osd/ReplicatedPG.cc
+++ b/src/osd/ReplicatedPG.cc
@@ -4120,6 +4120,10 @@ int ReplicatedPG::do_osd_ops(OpContext *ctx, vector<OSDOp>& ops)
 	}
 
 	if (!obs.exists) {
+	  if (pool.info.require_rollback() && op.extent.offset) {
+	    result = -EOPNOTSUPP;
+	    break;
+	  }
 	  ctx->mod_desc.create();
 	} else if (op.extent.offset == oi.size) {
 	  ctx->mod_desc.append(oi.size);
-- 
2.39.5