crimson/os/seastore/seastore_types: tolerate fake paddrs as absolute addresses

Signed-off-by: Yingxin Cheng <[email protected]>

Author: cyx1231st

src/crimson/os/seastore/seastore_types.h

@@ -643,8 +643,21 @@ struct paddr_t {
     return get_device_id() == DEVICE_ID_ROOT;
   }
 
+  /**
+   * is_absolute()
+   *
+   * indicates whether addr reflects an absolute location
+   * which can be found on disk.
+   *
+   * Note, fake paddrs should work like the absolute ones.
+   */
   bool is_absolute() const {
+#ifdef UNIT_TESTS_BUILT
+    return get_addr_type() != paddr_types_t::RESERVED ||
+           is_fake();
+#else
     return get_addr_type() != paddr_types_t::RESERVED;
+#endif
   }
 
   bool is_absolute_random_block() const {