rgw: during "bucket check --fix" set index entry pool id correctly

The current code sets the pool id of bucket index entries to the
bucket index pool rather than the data pool. This fixes that.

Signed-off-by: J. Eric Ivancich <ivancich@redhat.com>

src/rgw/rgw_rados.cc

@@ -9005,6 +9005,7 @@ int RGWRados::check_disk_state(const DoutPrefixProvider *dpp,
        * non-bad ways this could happen (there probably are, but annoying
        * to handle!) */
     }
+
     // encode a suggested removal of that key
     list_state.ver.epoch = io_ctx.get_last_version();
     list_state.ver.pool = io_ctx.get_id();
@@ -9060,15 +9061,26 @@ int RGWRados::check_disk_state(const DoutPrefixProvider *dpp,
   object.meta.owner_display_name = owner.get_display_name();
 
   // encode suggested updates
-  list_state.ver.pool = io_ctx.get_id();
-  list_state.ver.epoch = astate->epoch;
+
   list_state.meta.size = object.meta.size;
   list_state.meta.accounted_size = object.meta.accounted_size;
   list_state.meta.mtime = object.meta.mtime;
   list_state.meta.category = main_category;
   list_state.meta.etag = etag;
   list_state.meta.content_type = content_type;
 
+  librados::IoCtx head_obj_ctx; // initialize to data pool so we can get pool id
+  const bool head_pool_found =
+    get_obj_head_ioctx(dpp, bucket_info, obj, &head_obj_ctx);
+  if (head_pool_found) {
+    list_state.ver.pool = head_obj_ctx.get_id();
+    list_state.ver.epoch = astate->epoch;
+  } else {
+    ldpp_dout(dpp, 0) << __PRETTY_FUNCTION__ <<
+      " WARNING: unable to find head object data pool for \"" <<
+      obj << "\", not updating version pool/epoch" << dendl;
+  }
+
   if (astate->obj_tag.length() > 0) {
     list_state.tag = astate->obj_tag.c_str();
   }