Branch HEAD

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

diff --git a/lustre/include/lu_object.h b/lustre/include/lu_object.h
index 698caf1..bbade16 100644 (file)
--- a/lustre/include/lu_object.h
+++ b/lustre/include/lu_object.h
@@ -1,23 +1,37 @@
 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
  * vim:expandtab:shiftwidth=8:tabstop=8:
  *
- *  Copyright (C) 2006 Cluster File Systems, Inc.
+ * GPL HEADER START
  *
- *   This file is part of Lustre, http://www.lustre.org.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
- *   Lustre is free software; you can redistribute it and/or
- *   modify it under the terms of version 2 of the GNU General Public
- *   License as published by the Free Software Foundation.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
  *
- *   Lustre is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *   GNU General Public License for more details.
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Lustre; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright  2008 Sun Microsystems, Inc. All rights reserved
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
  */
 
 #ifndef __LUSTRE_LU_OBJECT_H
@@ -30,8 +44,7 @@
  */
 #include <lustre/lustre_idl.h>
 
-#include <libcfs/list.h>
-#include <libcfs/kp30.h>
+#include <libcfs/libcfs.h>
 
 /*
  * Layered objects support for CMD3/C5.
@@ -297,10 +310,11 @@ struct lu_device_type_operations {
                                                struct lu_device_type *t,
                                                struct lustre_cfg *lcfg);
         /*
-         * Free device. Dual to ->ldto_device_alloc().
+         * Free device. Dual to ->ldto_device_alloc(). Returns pointer to
+         * the next device in the stack.
          */
-        void (*ldto_device_free)(const struct lu_env *,
-                                 struct lu_device *);
+        struct lu_device *(*ldto_device_free)(const struct lu_env *,
+                                              struct lu_device *);
 
         /*
          * Initialize the devices after allocation
@@ -369,13 +383,13 @@ struct lu_attr {
         __u32          la_flags;  /* object flags */
         __u32          la_nlink;  /* number of persistent references to this
                                    * object */
+        __u32          la_blkbits; /* blk bits of the object*/
         __u32          la_blksize; /* blk size of the object*/
 
         __u32          la_rdev;   /* real device */
         __u64          la_valid;  /* valid bits */
 };
 
-
 /*
  * Layer in the layered object.
  */
@@ -798,6 +812,11 @@ void lu_object_print(const struct lu_env *env, void *cookie,
 int lu_object_invariant(const struct lu_object *o);
 
 /*
+ * Finalize and free devices in the device stack.
+ */
+void lu_stack_fini(const struct lu_env *env, struct lu_device *top);
+
+/*
  * Returns 1 iff object @o exists on the stable storage,
  * returns -1 iff object @o is on remote server.
  */
@@ -827,7 +846,7 @@ static inline int lu_object_assert_not_exists(const struct lu_object *o)
 /*
  * Attr of this object.
  */
-static inline const __u32 lu_object_attr(const struct lu_object *o)
+static inline __u32 lu_object_attr(const struct lu_object *o)
 {
         LASSERT(lu_object_exists(o) > 0);
         return o->lo_header->loh_attr;
@@ -835,7 +854,7 @@ static inline const __u32 lu_object_attr(const struct lu_object *o)
 
 struct lu_rdpg {
         /* input params, should be filled out by mdt */
-        __u32                   rp_hash;        /* hash */
+        __u64                   rp_hash;        /* hash */
         int                     rp_count;       /* count in bytes       */
         int                     rp_npages;      /* number of pages      */
         struct page           **rp_pages;       /* pointers to pages    */
@@ -846,6 +865,14 @@ enum lu_xattr_flags {
         LU_XATTR_CREATE  = (1 << 1)
 };
 
+/* For lu_context health-checks */
+enum lu_context_state {
+        LCS_INITIALIZED = 1,
+        LCS_ENTERED,
+        LCS_LEFT,
+        LCS_FINALIZED
+};
+
 /*
  * lu_context. Execution context for lu_object methods. Currently associated
  * with thread.
@@ -886,6 +913,7 @@ struct lu_context {
          * detail.
          */
         void                 **lc_value;
+        enum lu_context_state  lc_state;
 };
 
 /*