From 3a624ead77a34f13d8df09ea268ccad672bdbb14 Mon Sep 17 00:00:00 2001
From: Wido den Hollander <wido@42on.com>
Date: Thu, 11 Oct 2018 01:04:52 +0200
Subject: [PATCH] librados: Copy buffer on AIO read

Fixes: https://tracker.ceph.com/issues/36345

Signed-off-by: Wido den Hollander <wido@42on.com>
---
 src/librados/IoCtxImpl.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/librados/IoCtxImpl.cc b/src/librados/IoCtxImpl.cc
index cd93c44a952..502972ef8cf 100644
--- a/src/librados/IoCtxImpl.cc
+++ b/src/librados/IoCtxImpl.cc
@@ -1994,6 +1994,9 @@ void librados::IoCtxImpl::C_aio_Complete::finish(int r)
     if (c->out_buf && !c->blp->is_contiguous()) {
       c->rval = -ERANGE;
     } else {
+      if (c->out_buf && !c->blp->is_provided_buffer(c->out_buf))
+        c->blp->copy(0, c->blp->length(), c->out_buf);
+
       c->rval = c->blp->length();
     }
   }
-- 
2.47.3