rgw: fix 'bucket rm --bypass-gc' for copied objects

the `--bypass-gc` argument to `radosgw-admin bucket rm` causes us to
call `RadosBucket::remove_bypass_gc()`, which loops over the tail
objects and removes each with `RGWRados::delete_raw_obj_aio()`

however, this was removing the objects with `cls_rgw_remove_obj()`,
which is for head objects, not tails. tail objects must be removed with
`cls_refcount_put()`, which preserves them until the last copy is
removed

rename `delete_raw_obj_aio()` to `delete_tail_obj_aio()` to clarify its
purpose

Fixes: https://tracker.ceph.com/issues/73348

Signed-off-by: Casey Bodley <[email protected]>

Author: cbodley

src/rgw/driver/rados/rgw_rados.cc

@@ -11598,7 +11598,10 @@ librados::Rados* RGWRados::get_rados_handle()
   return &rados;
 }
 
-int RGWRados::delete_raw_obj_aio(const DoutPrefixProvider *dpp, const rgw_raw_obj& obj, list<librados::AioCompletion *>& handles)
+int RGWRados::delete_tail_obj_aio(const DoutPrefixProvider *dpp,
+                                  const rgw_raw_obj& obj,
+                                  const std::string& tag,
+                                  list<librados::AioCompletion *>& handles)
 {
   rgw_rados_ref ref;
   int ret = get_raw_obj_ref(dpp, obj, &ref);
@@ -11608,8 +11611,7 @@ int RGWRados::delete_raw_obj_aio(const DoutPrefixProvider *dpp, const rgw_raw_ob
   }
 
   ObjectWriteOperation op;
-  list<string> prefixes;
-  cls_rgw_remove_obj(op, prefixes);
+  cls_refcount_put(op, tag, true);
 
   AioCompletion *c = librados::Rados::aio_create_completion(nullptr, nullptr);
   ret = ref.ioctx.aio_operate(ref.obj.oid, c, &op);

src/rgw/driver/rados/rgw_rados.h

@@ -1686,7 +1686,8 @@ int restore_obj_from_cloud(RGWLCCloudTierCtx& tier_ctx,
 
   librados::Rados* get_rados_handle();
 
-  int delete_raw_obj_aio(const DoutPrefixProvider *dpp, const rgw_raw_obj& obj, std::list<librados::AioCompletion *>& handles);
+  int delete_tail_obj_aio(const DoutPrefixProvider *dpp, const rgw_raw_obj& obj,
+                          const std::string& tag, std::list<librados::AioCompletion *>& handles);
   int delete_obj_aio(const DoutPrefixProvider *dpp, const rgw_obj& obj, RGWBucketInfo& info, RGWObjState *astate,
                      std::list<librados::AioCompletion *>& handles, bool keep_index_consistent,
                      optional_yield y);

src/rgw/driver/rados/rgw_sal_rados.cc

@@ -555,6 +555,10 @@ int RadosBucket::remove_bypass_gc(int concurrent_max, bool
         rgw_raw_obj raw_head_obj;
         store->get_raw_obj(manifest.get_head_placement_rule(), head_obj, &raw_head_obj);
 
+        // tag for cls_refcount
+        const std::string tag = (astate->tail_tag.length() > 0
+                               ? astate->tail_tag.to_str()
+                               : astate->obj_tag.to_str());
         for (; miter != manifest.obj_end(dpp) && max_aio--; ++miter) {
           if (!max_aio) {
             ret = drain_aio(handles);
@@ -571,7 +575,7 @@ int RadosBucket::remove_bypass_gc(int concurrent_max, bool
             continue;
           }
 
-          ret = store->getRados()->delete_raw_obj_aio(dpp, last_obj, handles);
+          ret = store->getRados()->delete_tail_obj_aio(dpp, last_obj, tag, handles);
           if (ret < 0) {
             ldpp_dout(dpp, -1) << "ERROR: delete obj aio failed with " << ret << dendl;
             return ret;