LU-5823 clio: add cl_object_fiemap()

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

diff --git a/lustre/obdclass/cl_object.c b/lustre/obdclass/cl_object.c
index ad3f5ea..59ce8de 100644 (file)
--- a/lustre/obdclass/cl_object.c
+++ b/lustre/obdclass/cl_object.c
@@ -386,6 +386,39 @@ int cl_object_find_cbdata(const struct lu_env *env, struct cl_object *obj,
 EXPORT_SYMBOL(cl_object_find_cbdata);
 
 /**
+ * Get fiemap extents from file object.
+ *
+ * \param env [in]     lustre environment
+ * \param obj [in]     file object
+ * \param key [in]     fiemap request argument
+ * \param fiemap [out] fiemap extents mapping retrived
+ * \param buflen [in]  max buffer length of @fiemap
+ *
+ * \retval 0   success
+ * \retval < 0 error
+ */
+int cl_object_fiemap(const struct lu_env *env, struct cl_object *obj,
+                    struct ll_fiemap_info_key *key,
+                    struct fiemap *fiemap, size_t *buflen)
+{
+       struct lu_object_header *top;
+       int                     result = 0;
+       ENTRY;
+
+       top = obj->co_lu.lo_header;
+       list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
+               if (obj->co_ops->coo_fiemap != NULL) {
+                       result = obj->co_ops->coo_fiemap(env, obj, key, fiemap,
+                                                        buflen);
+                       if (result != 0)
+                               break;
+               }
+       }
+       RETURN(result);
+}
+EXPORT_SYMBOL(cl_object_fiemap);
+
+/**
  * Helper function removing all object locks, and marking object for
  * deletion. All object pages must have been deleted at this point.
  *