#define ldlm_set_cancel_on_block(_l) LDLM_SET_FLAG(( _l), 1ULL << 23)
#define ldlm_clear_cancel_on_block(_l) LDLM_CLEAR_FLAG((_l), 1ULL << 23)
+/** Flag whether a lock is enqueued from a distributed transaction, and the
+ * requesting lock mode is PW/EX, if so, it will check compatibility with COS
+ * locks, and different from original COS semantic, transactions from the same
+ * client is also treated as lock conflict. */
+#define LDLM_FL_COS_INCOMPAT 0x0000000001000000ULL /* bit 24 */
+#define ldlm_is_cos_incompat(_l) LDLM_TEST_FLAG((_l), 1ULL << 24)
+#define ldlm_set_cos_incompat(_l) LDLM_SET_FLAG((_l), 1ULL << 24)
+#define ldlm_clear_cos_incompat(_l) LDLM_CLEAR_FLAG((_l), 1ULL << 24)
+
/**
* measure lock contention and return -EUSERS if locking contention is high */
#define LDLM_FL_DENY_ON_CONTENTION 0x0000000040000000ULL // bit 30
/** Flag whether a lock is found on server for re-sent RPC. */
#define LDLM_FL_RESENT 0x0100000000000000ULL // bit 56
+/** Flag whether Commit-on-Sharing is enabled, if LDLM_FL_COS_INCOMPAT is set
+ * this flag may not be set because once the former is set this flag won't be
+ * checked, and for cross-MDT lock COS_INCOMPAT is always set but ast handle is
+ * in ldlm context which doesn't know whether COS is enabled or not. */
+#define LDLM_FL_COS_ENABLED 0x0200000000000000ULL /* bit 57 */
+#define ldlm_is_cos_enabled(_l) LDLM_TEST_FLAG((_l), 1ULL << 57)
+#define ldlm_set_cos_enabled(_l) LDLM_SET_FLAG((_l), 1ULL << 57)
+
/** l_flags bits marked as "ast" bits */
#define LDLM_FL_AST_MASK (LDLM_FL_FLOCK_DEADLOCK |\
LDLM_FL_AST_DISCARD_DATA)