LU-5814 llite: add cl_object_maxbytes()

[fs/lustre-release.git] / lustre / obdclass / cl_object.c

diff --git a/lustre/obdclass/cl_object.c b/lustre/obdclass/cl_object.c
index a63b0cf..9b3e71b 100644 (file)
--- a/lustre/obdclass/cl_object.c
+++ b/lustre/obdclass/cl_object.c
@@ -474,6 +474,22 @@ int cl_object_layout_get(const struct lu_env *env, struct cl_object *obj,
 }
 EXPORT_SYMBOL(cl_object_layout_get);
 
+loff_t cl_object_maxbytes(struct cl_object *obj)
+{
+       struct lu_object_header *top = obj->co_lu.lo_header;
+       loff_t maxbytes = LLONG_MAX;
+       ENTRY;
+
+       list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
+               if (obj->co_ops->coo_maxbytes != NULL)
+                       maxbytes = min_t(loff_t, obj->co_ops->coo_maxbytes(obj),
+                                        maxbytes);
+       }
+
+       RETURN(maxbytes);
+}
+EXPORT_SYMBOL(cl_object_maxbytes);
+
 /**
  * Helper function removing all object locks, and marking object for
  * deletion. All object pages must have been deleted at this point.