librados: require OSDREPLYMUX feature

We need this since we now rely on the server telling us rvals and
payload_lens for each OSDOp.

Signed-off-by: Sage Weil <sage.weil@dreamhost.com>

diff --git a/src/librados.cc b/src/librados.cc
index 9cd44ddcb2ffcd16a725aadff3eb95e4ea004c2d..e8617844065f06696c57125ab3ef83e596a48dee 100644 (file)
--- a/src/librados.cc
+++ b/src/librados.cc
@@ -929,6 +929,11 @@ int librados::RadosClient::connect()
   if (!messenger)
     goto out;
 
+  // require OSDREPLYMUX feature.  this means we will fail to talk to
+  // old servers.  this is necessary because otherwise we won't know
+  // how to decompose the reply data into its consituent pieces.
+  messenger->set_default_policy(SimpleMessenger::Policy::client(0, CEPH_FEATURE_OSDREPLYMUX));
+
   ldout(cct, 1) << "starting msgr at " << messenger->get_ms_addr() << dendl;
 
   messenger->register_entity(entity_name_t::CLIENT(-1));