rgw: fetch_remote_obj filters out olh attrs

each zone manages its own olh log, so we don't want any of the source
zone's olh attributes. in one case (sync of an object overwrite in a
versioning-suspended bucket), these olh attributes were being written
directly to the head object and leading to link_olh errors due to the
olh_tag mismatch

Fixes: http://tracker.ceph.com/issues/37792
Signed-off-by: Casey Bodley <cbodley@redhat.com>

diff --git a/src/rgw/rgw_rados.cc b/src/rgw/rgw_rados.cc
index cb76de7167185012fb5e8deee5e58dc87b253d71..d71dcfb988f98383a09f3cb3ffb274b12b77b146 100644 (file)
--- a/src/rgw/rgw_rados.cc
+++ b/src/rgw/rgw_rados.cc
@@ -3832,6 +3832,15 @@ public:
 
       src_attrs.erase(RGW_ATTR_COMPRESSION);
       src_attrs.erase(RGW_ATTR_MANIFEST); // not interested in original object layout
+
+      // filter out olh attributes
+      auto iter = src_attrs.lower_bound(RGW_ATTR_OLH_PREFIX);
+      while (iter != src_attrs.end()) {
+        if (!boost::algorithm::starts_with(iter->first, RGW_ATTR_OLH_PREFIX)) {
+          break;
+        }
+        iter = src_attrs.erase(iter);
+      }
     }
 
     if (plugin && src_attrs.find(RGW_ATTR_CRYPT_MODE) == src_attrs.end()) {