LU-9165 pfl: MDS handling of write intent IT_LAYOUT RPC

[fs/lustre-release.git] / lustre / include / md_object.h

diff --git a/lustre/include/md_object.h b/lustre/include/md_object.h
index cec9c93..41970de 100644 (file)
--- a/lustre/include/md_object.h
+++ b/lustre/include/md_object.h
@@ -217,6 +217,24 @@ struct md_object_operations {
                                 union ldlm_policy_data *policy);
 
        int (*moo_invalidate)(const struct lu_env *env, struct md_object *obj);
+       /**
+        * Trying to write to un-instantiated layout component.
+        *
+        * The caller should have held layout lock.
+        *
+        * \param[in] env       execution environment
+        * \param[in] obj       MD object
+        * \param[in] layout    data structure to describe the changes to
+        *                      the MD object's layout
+        * \param[in] buf       buffer containing the client's lovea
+        *
+        * \retval 0            success
+        * \retval -ne          error code
+        */
+       int (*moo_layout_change)(const struct lu_env *env,
+                                struct md_object *obj,
+                                struct layout_intent *layout,
+                                const struct lu_buf *buf);
 };
 
 /**
@@ -428,6 +446,20 @@ static inline int mo_invalidate(const struct lu_env *env, struct md_object *m)
        return m->mo_ops->moo_invalidate(env, m);
 }
 
+static inline int mo_layout_change(const struct lu_env *env,
+                                  struct md_object *m,
+                                  struct layout_intent *layout,
+                                  const struct lu_buf *buf)
+{
+       CDEBUG(D_INFO, "got layout change request from client: "
+              "opc:%u flags:%#x extent[%#llx,%#llx)\n",
+              layout->li_opc, layout->li_flags,
+              layout->li_start, layout->li_end);
+       /* need instantiate objects which in the access range */
+       LASSERT(m->mo_ops->moo_layout_change);
+       return m->mo_ops->moo_layout_change(env, m, layout, buf);
+}
+
 static inline int mo_swap_layouts(const struct lu_env *env,
                                  struct md_object *o1,
                                  struct md_object *o2, __u64 flags)