LU-17550 lov: check for empty layout on DIO

[fs/lustre-release.git] / lustre / lov / lov_io.c

diff --git a/lustre/lov/lov_io.c b/lustre/lov/lov_io.c
index aa3c71a..bd235b8 100644 (file)
--- a/lustre/lov/lov_io.c
+++ b/lustre/lov/lov_io.c
@@ -1999,6 +1999,19 @@ int lov_io_init_released(const struct lu_env *env, struct cl_object *obj,
        RETURN(result);
 }
 
+/* confirm this offset is in the given layout entry */
+bool lov_io_layout_at_confirm(struct lov_io *lio, int entry, __u64 offset)
+{
+       struct lov_object *lov = lio->lis_object;
+       struct lov_layout_entry *lle = lov_entry(lov, entry);
+
+       if ((offset >= lle->lle_extent->e_start &&
+            offset < lle->lle_extent->e_end) ||
+           (offset == OBD_OBJECT_EOF &&
+            lle->lle_extent->e_end == OBD_OBJECT_EOF))
+               return true;
+       return false;
+}
 /**
  * Return the index in composite:lo_entries by the file offset
  */