land clio.

[fs/lustre-release.git] / lustre / lov / lovsub_page.c

diff --git a/lustre/lov/lovsub_page.c b/lustre/lov/lovsub_page.c
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+++ b/lustre/lov/lovsub_page.c
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+/* -*- 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.
+ *
+ * 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.
+ *
+ * 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
+ * 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.
+ *
+ * Implementation of cl_page for LOVSUB layer.
+ *
+ *   Author: Nikita Danilov <nikita.danilov@sun.com>
+ */
+
+#define DEBUG_SUBSYSTEM S_LOV
+
+#include "lov_cl_internal.h"
+
+/** \addtogroup lov lov @{ */
+
+/*****************************************************************************
+ *
+ * Lovsub page operations.
+ *
+ */
+
+static void lovsub_page_fini(const struct lu_env *env,
+                             struct cl_page_slice *slice)
+{
+        struct lovsub_page *lsb = cl2lovsub_page(slice);
+        ENTRY;
+        OBD_SLAB_FREE_PTR(lsb, lovsub_page_kmem);
+        EXIT;
+}
+
+static const struct cl_page_operations lovsub_page_ops = {
+        .cpo_fini   = lovsub_page_fini
+};
+
+struct cl_page *lovsub_page_init(const struct lu_env *env,
+                                 struct cl_object *obj,
+                                 struct cl_page *page, cfs_page_t *_)
+{
+        struct lovsub_page *lsb;
+        int result;
+
+        ENTRY;
+        OBD_SLAB_ALLOC_PTR(lsb, lovsub_page_kmem);
+        if (lsb != NULL) {
+                cl_page_slice_add(page, &lsb->lsb_cl, obj, &lovsub_page_ops);
+                result = 0;
+        } else
+                result = -ENOMEM;
+        RETURN(ERR_PTR(result));
+}
+
+/** @} lov */