From f2dda43c9ed4fda9cfa87362514985ee79e0ae15 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@inktank.com>
Date: Wed, 27 Mar 2013 12:59:41 -0700
Subject: [PATCH] osd: EINVAL when rmw_flags is 0

A broken client (e.g., v0.56) can send a request that ends up with an
rmw_flags of 0.  Treat this as invalid and return EINVAL.

Fixes: #4556
Signed-off-by: Sage Weil <sage@inktank.com>
---
 src/osd/OSD.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/osd/OSD.cc b/src/osd/OSD.cc
index 521237712171..6b9057994961 100644
--- a/src/osd/OSD.cc
+++ b/src/osd/OSD.cc
@@ -6532,5 +6532,8 @@ int OSD::init_op_flags(OpRequestRef op)
     }
   }
 
+  if (op->rmw_flags == 0)
+    return -EINVAL;
+
   return 0;
 }
-- 
2.47.3