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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2014, 2015, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * FIEMAP data structures and flags. This header file will be used until
33 * fiemap.h is available in the upstream kernel.
35 * Author: Kalpak Shah <kalpak.shah@sun.com>
36 * Author: Andreas Dilger <adilger@sun.com>
39 #ifndef _LUSTRE_FIEMAP_H
40 #define _LUSTRE_FIEMAP_H
43 #include <linux/fiemap.h>
44 #include <linux/types.h>
47 * XXX: We use fiemap_extent::fe_reserved[0], notice the high 16bits of it
48 * is used to locate the stripe number starting from the very beginning to
49 * resume the fiemap call.
51 #define fe_device fe_reserved[0]
53 static inline int get_fe_device(struct fiemap_extent *fe)
55 return fe->fe_device & 0xffff;
57 static inline void set_fe_device(struct fiemap_extent *fe, int devno)
59 fe->fe_device = (fe->fe_device & 0xffff0000) | (devno & 0xffff);
61 static inline int get_fe_stripenr(struct fiemap_extent *fe)
63 return fe->fe_device >> 16;
65 static inline void set_fe_stripenr(struct fiemap_extent *fe, int nr)
67 fe->fe_device = (fe->fe_device & 0xffff) | (nr << 16);
69 static inline void set_fe_device_stripenr(struct fiemap_extent *fe, int devno,
72 fe->fe_device = (nr << 16) | (devno & 0xffff);
75 static inline __kernel_size_t fiemap_count_to_size(__kernel_size_t extent_count)
77 return sizeof(struct fiemap) + extent_count *
78 sizeof(struct fiemap_extent);
81 static inline unsigned int fiemap_size_to_count(__kernel_size_t array_size)
83 return (array_size - sizeof(struct fiemap)) /
84 sizeof(struct fiemap_extent);
87 #define FIEMAP_FLAG_DEVICE_ORDER 0x40000000 /* return device ordered mapping */
89 #ifdef FIEMAP_FLAGS_COMPAT
90 #undef FIEMAP_FLAGS_COMPAT
93 #define FIEMAP_EXTENT_NET 0x80000000 /* Data stored remotely.
94 * Sets NO_DIRECT flag */
96 #endif /* _LUSTRE_FIEMAP_H */