LU-1666 obdclass: reduce lock contention on coh_page_guard

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

diff --git a/lustre/include/lu_target.h b/lustre/include/lu_target.h
index aae74e9..7773160 100644 (file)
--- a/lustre/include/lu_target.h
+++ b/lustre/include/lu_target.h
@@ -1,6 +1,4 @@
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
  * GPL HEADER START
  *
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
@@ -26,8 +24,10 @@
  * GPL HEADER END
  */
 /*
- * Copyright  2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2009, 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/
@@ -52,15 +52,11 @@ struct lu_target {
         /** Server last transaction number */
         __u64                    lut_last_transno;
         /** Lock protecting last transaction number */
-        spinlock_t               lut_translock;
+        cfs_spinlock_t           lut_translock;
         /** Lock protecting client bitmap */
-        spinlock_t               lut_client_bitmap_lock;
+        cfs_spinlock_t           lut_client_bitmap_lock;
         /** Bitmap of known clients */
-        unsigned long            lut_client_bitmap[LR_CLIENT_BITMAP_SIZE];
-        /** Number of mounts */
-        __u64                    lut_mount_count;
-        __u32                    lut_stale_export_age;
-        spinlock_t               lut_trans_table_lock;
+        unsigned long           *lut_client_bitmap;
 };
 
 typedef void (*lut_cb_t)(struct lu_target *lut, __u64 transno,
@@ -70,11 +66,26 @@ struct lut_commit_cb {
         void     *lut_cb_data;
 };
 
-void lut_boot_epoch_update(struct lu_target *);
-void lut_cb_last_committed(struct lu_target *, __u64, void *, int);
-void lut_cb_client(struct lu_target *, __u64, void *, int);
-int lut_init(const struct lu_env *, struct lu_target *,
-             struct obd_device *, struct dt_device *);
-void lut_fini(const struct lu_env *, struct lu_target *);
+void lut_boot_epoch_update(struct lu_target *lut);
+int lut_last_commit_cb_add(struct thandle *th, struct lu_target *lut,
+                          struct obd_export *exp, __u64 transno);
+int lut_new_client_cb_add(struct thandle *th, struct obd_export *exp);
+int lut_init(const struct lu_env *env, struct lu_target *lut,
+            struct obd_device *obd, struct dt_device *dt);
+void lut_fini(const struct lu_env *env, struct lu_target *lut);
+int lut_client_alloc(struct obd_export *exp);
+void lut_client_free(struct obd_export *exp);
+int lut_client_del(const struct lu_env *env, struct obd_export *exp);
+int lut_client_add(const struct lu_env *env, struct obd_export *exp, int);
+int lut_client_new(const struct lu_env *env, struct obd_export *exp);
+int lut_client_data_read(const struct lu_env *env, struct lu_target *tg,
+                        struct lsd_client_data *lcd, loff_t *off, int index);
+int lut_client_data_write(const struct lu_env *env, struct lu_target *tg,
+                         struct lsd_client_data *lcd, loff_t *off, struct thandle *th);
+int lut_server_data_read(const struct lu_env *env, struct lu_target *tg);
+int lut_server_data_write(const struct lu_env *env, struct lu_target *tg,
+                         struct thandle *th);
+int lut_server_data_update(const struct lu_env *env, struct lu_target *tg, int sync);
+int lut_truncate_last_rcvd(const struct lu_env *env, struct lu_target *tg, loff_t off);
 
 #endif /* __LUSTRE_LU_TARGET_H */