4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2014, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/include/lustre/ll_fiemap.h
38 * FIEMAP data structures and flags. This header file will be used until
39 * fiemap.h is available in the upstream kernel.
41 * Author: Kalpak Shah <kalpak.shah@sun.com>
42 * Author: Andreas Dilger <adilger@sun.com>
45 #ifndef _LUSTRE_FIEMAP_H
46 #define _LUSTRE_FIEMAP_H
50 #include <linux/fiemap.h>
53 /* XXX: We use fiemap_extent::fe_reserved[0] */
54 #define fe_device fe_reserved[0]
56 static inline size_t fiemap_count_to_size(size_t extent_count)
58 return sizeof(struct fiemap) + extent_count *
59 sizeof(struct fiemap_extent);
62 static inline unsigned fiemap_size_to_count(size_t array_size)
64 return (array_size - sizeof(struct fiemap)) /
65 sizeof(struct fiemap_extent);
68 #define FIEMAP_FLAG_DEVICE_ORDER 0x40000000 /* return device ordered mapping */
70 #ifdef FIEMAP_FLAGS_COMPAT
71 #undef FIEMAP_FLAGS_COMPAT
74 /* Lustre specific flags - use a high bit, don't conflict with upstream flag */
75 #define FIEMAP_EXTENT_NO_DIRECT 0x40000000 /* Data mapping undefined */
76 #define FIEMAP_EXTENT_NET 0x80000000 /* Data stored remotely.
77 * Sets NO_DIRECT flag */
79 #endif /* _LUSTRE_FIEMAP_H */