OSDMap: fill in known encode_features where possible

Otherwise, if we get an incremental from hammer (struct_v = 6) we will
encode the full map as if it were before CEPH_FEATURE_PGID64, which
was actually pre-argonaut.  Similarly, if struct_v >= 7, we know it
was encoded with CEPH_FEATURE_OSDMAP_ENC.

Fixes: #13234
Backport: hammer
Signed-off-by: Samuel Just <sjust@redhat.com>
(cherry picked from commit 04679c5451e353c966f6ed00b33fa97be8072a79)

diff --git a/src/osd/OSDMap.cc b/src/osd/OSDMap.cc
index 1700f6b6e6f2f1d10abd499cc9096441b0be77a2..d022848797f24fcf7d8188c2704c3c478651e1d1 100644 (file)
--- a/src/osd/OSDMap.cc
+++ b/src/osd/OSDMap.cc
@@ -590,6 +590,10 @@ void OSDMap::Incremental::decode(bufferlist::iterator& bl)
     bl.advance(-struct_v_size);
     decode_classic(bl);
     encode_features = 0;
+    if (struct_v >= 6)
+      encode_features = CEPH_FEATURE_PGID64;
+    else
+      encode_features = 0;
     return;
   }
   {
@@ -641,7 +645,7 @@ void OSDMap::Incremental::decode(bufferlist::iterator& bl)
     if (struct_v >= 2)
       ::decode(encode_features, bl);
     else
-      encode_features = 0;
+      encode_features = CEPH_FEATURE_PGID64 | CEPH_FEATURE_OSDMAP_ENC;
     DECODE_FINISH(bl); // osd-only data
   }