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/
31 * FIEMAP data structures and flags. This header file will be used until
32 * fiemap.h is available in the upstream kernel.
34 * Author: Kalpak Shah <kalpak.shah@sun.com>
35 * Author: Andreas Dilger <adilger@sun.com>
38 #ifndef _LUSTRE_FIEMAP_H
39 #define _LUSTRE_FIEMAP_H
42 # include <linux/stddef.h>
46 #include <linux/fiemap.h>
47 #include <linux/types.h>
50 * XXX: We use fiemap_extent::fe_reserved[0], notice the high 16bits of it
51 * is used to locate the stripe number starting from the very beginning to
52 * resume the fiemap call.
54 #define fe_device fe_reserved[0]
56 static inline int get_fe_device(struct fiemap_extent *fe)
58 return fe->fe_device & 0xffff;
60 static inline void set_fe_device(struct fiemap_extent *fe, int devno)
62 fe->fe_device = (fe->fe_device & 0xffff0000) | (devno & 0xffff);
64 static inline int get_fe_stripenr(struct fiemap_extent *fe)
66 return fe->fe_device >> 16;
68 static inline void set_fe_stripenr(struct fiemap_extent *fe, int nr)
70 fe->fe_device = (fe->fe_device & 0xffff) | (nr << 16);
72 static inline void set_fe_device_stripenr(struct fiemap_extent *fe, int devno,
75 fe->fe_device = (nr << 16) | (devno & 0xffff);
78 static inline __kernel_size_t fiemap_count_to_size(__kernel_size_t extent_count)
80 return sizeof(struct fiemap) + extent_count *
81 sizeof(struct fiemap_extent);
84 static inline unsigned int fiemap_size_to_count(__kernel_size_t array_size)
86 return (array_size - sizeof(struct fiemap)) /
87 sizeof(struct fiemap_extent);
90 #define FIEMAP_FLAG_DEVICE_ORDER 0x40000000 /* return device ordered mapping */
92 #ifdef FIEMAP_FLAGS_COMPAT
93 #undef FIEMAP_FLAGS_COMPAT
96 #define FIEMAP_EXTENT_NET 0x80000000 /* Data stored remotely.
97 * Sets NO_DIRECT flag */
99 #endif /* _LUSTRE_FIEMAP_H */