LU-571 ldlm: add parallel ast flow control

[fs/lustre-release.git] / lustre / ldlm / ldlm_internal.h

diff --git a/lustre/ldlm/ldlm_internal.h b/lustre/ldlm/ldlm_internal.h
index d6ff17f..f6bb70e 100644 (file)
--- a/lustre/ldlm/ldlm_internal.h
+++ b/lustre/ldlm/ldlm_internal.h
@@ -28,6 +28,9 @@
 /*
  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
+ *
+ * Copyright (c) 2011 Whamcloud, Inc.
+ *
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -43,6 +46,12 @@ extern cfs_list_t ldlm_srv_namespace_list;
 extern cfs_semaphore_t ldlm_cli_namespace_lock;
 extern cfs_list_t ldlm_cli_namespace_list;
 
+static inline int ldlm_res_eq(const struct ldlm_res_id *res0,
+                       const struct ldlm_res_id *res1)
+{
+        return !memcmp(res0, res1, sizeof(*res0));
+}
+
 static inline cfs_atomic_t *ldlm_namespace_nr(ldlm_side_t client)
 {
         return client == LDLM_NAMESPACE_SERVER ?
@@ -72,7 +81,9 @@ enum {
         LDLM_CANCEL_AGED   = 1 << 0, /* Cancel aged locks (non lru resize). */
         LDLM_CANCEL_PASSED = 1 << 1, /* Cancel passed number of locks. */
         LDLM_CANCEL_SHRINK = 1 << 2, /* Cancel locks from shrinker. */
-        LDLM_CANCEL_LRUR   = 1 << 3  /* Cancel locks from lru resize. */
+        LDLM_CANCEL_LRUR   = 1 << 3, /* Cancel locks from lru resize. */
+        LDLM_CANCEL_NO_WAIT = 1 << 4 /* Cancel locks w/o blocking (neither
+                                      * sending nor waiting for any rpcs) */
 };
 
 int ldlm_cancel_lru(struct ldlm_namespace *ns, int nr, ldlm_sync_t sync,
@@ -92,14 +103,12 @@ void ldlm_namespace_free_prior(struct ldlm_namespace *ns,
 void ldlm_namespace_free_post(struct ldlm_namespace *ns);
 /* ldlm_lock.c */
 
-/* Number of blocking/completion callbacks that will be sent in
- * parallel (see bug 11301). */
-#define PARALLEL_AST_LIMIT      200
-
 struct ldlm_cb_set_arg {
-        struct ptlrpc_request_set *set;
+        int          type;      /* LDLM_BL_CALLBACK or LDLM_CP_CALLBACK */
+        unsigned int threshold; /* threshold to wake up the waiting proc */
+        cfs_atomic_t rpcs;      /* # of inflight rpcs in set */
         cfs_atomic_t restart;
-        __u32 type; /* LDLM_BL_CALLBACK or LDLM_CP_CALLBACK */
+        cfs_waitq_t  waitq;
 };
 
 typedef enum {
@@ -124,7 +133,8 @@ void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
                             cfs_list_t *work_list);
 int ldlm_reprocess_queue(struct ldlm_resource *res, cfs_list_t *queue,
                          cfs_list_t *work_list);
-int ldlm_run_ast_work(cfs_list_t *rpc_list, ldlm_desc_ast_t ast_type);
+int ldlm_run_ast_work(struct ldlm_namespace *ns, cfs_list_t *rpc_list,
+                      ldlm_desc_ast_t ast_type);
 int ldlm_lock_remove_from_lru(struct ldlm_lock *lock);
 int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock);
 void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock);
@@ -200,7 +210,8 @@ void ldlm_exit(void);
 
 enum ldlm_policy_res {
         LDLM_POLICY_CANCEL_LOCK,
-        LDLM_POLICY_KEEP_LOCK
+        LDLM_POLICY_KEEP_LOCK,
+        LDLM_POLICY_SKIP_LOCK
 };
 
 typedef enum ldlm_policy_res ldlm_policy_res_t;
@@ -249,9 +260,32 @@ static inline int is_granted_or_cancelled(struct ldlm_lock *lock)
         lock_res_and_lock(lock);
         if (((lock->l_req_mode == lock->l_granted_mode) &&
              !(lock->l_flags & LDLM_FL_CP_REQD)) ||
-            (lock->l_flags & LDLM_FL_FAILED))
+            (lock->l_flags & (LDLM_FL_FAILED | LDLM_FL_CANCEL)))
                 ret = 1;
         unlock_res_and_lock(lock);
 
         return ret;
 }
+
+typedef void (*ldlm_policy_wire_to_local_t)(const ldlm_wire_policy_data_t *,
+                                            ldlm_policy_data_t *);
+
+typedef void (*ldlm_policy_local_to_wire_t)(const ldlm_policy_data_t *,
+                                            ldlm_wire_policy_data_t *);
+
+void ldlm_plain_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
+                                     ldlm_policy_data_t *lpolicy);
+void ldlm_plain_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
+                                     ldlm_wire_policy_data_t *wpolicy);
+void ldlm_ibits_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
+                                     ldlm_policy_data_t *lpolicy);
+void ldlm_ibits_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
+                                     ldlm_wire_policy_data_t *wpolicy);
+void ldlm_extent_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
+                                     ldlm_policy_data_t *lpolicy);
+void ldlm_extent_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
+                                     ldlm_wire_policy_data_t *wpolicy);
+void ldlm_flock_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
+                                     ldlm_policy_data_t *lpolicy);
+void ldlm_flock_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
+                                     ldlm_wire_policy_data_t *wpolicy);