LU-13440 lmv: add default LMV inherit depth

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

diff --git a/lustre/include/lu_object.h b/lustre/include/lu_object.h
index 01a3e0d..884d79e 100644 (file)
--- a/lustre/include/lu_object.h
+++ b/lustre/include/lu_object.h
@@ -1677,11 +1677,33 @@ int lu_tgt_descs_init(struct lu_tgt_descs *ltd, bool is_mdt);
 void lu_tgt_descs_fini(struct lu_tgt_descs *ltd);
 int ltd_add_tgt(struct lu_tgt_descs *ltd, struct lu_tgt_desc *tgt);
 void ltd_del_tgt(struct lu_tgt_descs *ltd, struct lu_tgt_desc *tgt);
-bool ltd_qos_is_usable(struct lu_tgt_descs *ltd);
 int ltd_qos_penalties_calc(struct lu_tgt_descs *ltd);
 int ltd_qos_update(struct lu_tgt_descs *ltd, struct lu_tgt_desc *tgt,
                   __u64 *total_wt);
 
+/**
+ * Whether MDT inode and space usages are balanced.
+ */
+static inline bool ltd_qos_is_balanced(struct lu_tgt_descs *ltd)
+{
+       return !test_bit(LQ_DIRTY, &ltd->ltd_qos.lq_flags) &&
+              test_bit(LQ_SAME_SPACE, &ltd->ltd_qos.lq_flags);
+}
+
+/**
+ * Whether QoS data is up-to-date and QoS can be applied.
+ */
+static inline bool ltd_qos_is_usable(struct lu_tgt_descs *ltd)
+{
+       if (ltd_qos_is_balanced(ltd))
+               return false;
+
+       if (ltd->ltd_lov_desc.ld_active_tgt_count < 2)
+               return false;
+
+       return true;
+}
+
 static inline struct lu_tgt_desc *ltd_first_tgt(struct lu_tgt_descs *ltd)
 {
        int index;