| /* |
| * 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.gnu.org/licenses/gpl-2.0.html |
| * |
| * GPL HEADER END |
| */ |
| /* |
| * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Use is subject to license terms. |
| * |
| * Copyright (c) 2014, 2015, Intel Corporation. |
| */ |
| /* |
| * This file is part of Lustre, http://www.lustre.org/ |
| * Lustre is a trademark of Sun Microsystems, Inc. |
| * |
| * lustre/include/lustre/ll_fiemap.h |
| * |
| * FIEMAP data structures and flags. This header file will be used until |
| * fiemap.h is available in the upstream kernel. |
| * |
| * Author: Kalpak Shah <kalpak.shah@sun.com> |
| * Author: Andreas Dilger <adilger@sun.com> |
| */ |
| |
| #ifndef _LUSTRE_FIEMAP_H |
| #define _LUSTRE_FIEMAP_H |
| |
| struct ll_fiemap_extent { |
| __u64 fe_logical; /* logical offset in bytes for the start of |
| * the extent from the beginning of the file |
| */ |
| __u64 fe_physical; /* physical offset in bytes for the start |
| * of the extent from the beginning of the disk |
| */ |
| __u64 fe_length; /* length in bytes for this extent */ |
| __u64 fe_reserved64[2]; |
| __u32 fe_flags; /* FIEMAP_EXTENT_* flags for this extent */ |
| __u32 fe_device; /* device number for this extent */ |
| __u32 fe_reserved[2]; |
| }; |
| |
| struct ll_user_fiemap { |
| __u64 fm_start; /* logical offset (inclusive) at |
| * which to start mapping (in) |
| */ |
| __u64 fm_length; /* logical length of mapping which |
| * userspace wants (in) |
| */ |
| __u32 fm_flags; /* FIEMAP_FLAG_* flags for request (in/out) */ |
| __u32 fm_mapped_extents;/* number of extents that were mapped (out) */ |
| __u32 fm_extent_count; /* size of fm_extents array (in) */ |
| __u32 fm_reserved; |
| struct ll_fiemap_extent fm_extents[0]; /* array of mapped extents (out) */ |
| }; |
| |
| #define FIEMAP_MAX_OFFSET (~0ULL) |
| |
| #define FIEMAP_FLAG_SYNC 0x00000001 /* sync file data before |
| * map |
| */ |
| #define FIEMAP_FLAG_XATTR 0x00000002 /* map extended attribute |
| * tree |
| */ |
| #define FIEMAP_EXTENT_LAST 0x00000001 /* Last extent in file. */ |
| #define FIEMAP_EXTENT_UNKNOWN 0x00000002 /* Data location unknown. */ |
| #define FIEMAP_EXTENT_DELALLOC 0x00000004 /* Location still pending. |
| * Sets EXTENT_UNKNOWN. |
| */ |
| #define FIEMAP_EXTENT_ENCODED 0x00000008 /* Data can not be read |
| * while fs is unmounted |
| */ |
| #define FIEMAP_EXTENT_DATA_ENCRYPTED 0x00000080 /* Data is encrypted by fs. |
| * Sets EXTENT_NO_DIRECT. |
| */ |
| #define FIEMAP_EXTENT_NOT_ALIGNED 0x00000100 /* Extent offsets may not be |
| * block aligned. |
| */ |
| #define FIEMAP_EXTENT_DATA_INLINE 0x00000200 /* Data mixed with metadata. |
| * Sets EXTENT_NOT_ALIGNED.*/ |
| #define FIEMAP_EXTENT_DATA_TAIL 0x00000400 /* Multiple files in block. |
| * Sets EXTENT_NOT_ALIGNED. |
| */ |
| #define FIEMAP_EXTENT_UNWRITTEN 0x00000800 /* Space allocated, but |
| * no data (i.e. zero). |
| */ |
| #define FIEMAP_EXTENT_MERGED 0x00001000 /* File does not natively |
| * support extents. Result |
| * merged for efficiency. |
| */ |
| |
| static inline size_t fiemap_count_to_size(size_t extent_count) |
| { |
| return (sizeof(struct ll_user_fiemap) + extent_count * |
| sizeof(struct ll_fiemap_extent)); |
| } |
| |
| static inline unsigned fiemap_size_to_count(size_t array_size) |
| { |
| return ((array_size - sizeof(struct ll_user_fiemap)) / |
| sizeof(struct ll_fiemap_extent)); |
| } |
| |
| #define FIEMAP_FLAG_DEVICE_ORDER 0x40000000 /* return device ordered mapping */ |
| |
| #ifdef FIEMAP_FLAGS_COMPAT |
| #undef FIEMAP_FLAGS_COMPAT |
| #endif |
| |
| /* Lustre specific flags - use a high bit, don't conflict with upstream flag */ |
| #define FIEMAP_EXTENT_NO_DIRECT 0x40000000 /* Data mapping undefined */ |
| #define FIEMAP_EXTENT_NET 0x80000000 /* Data stored remotely. |
| * Sets NO_DIRECT flag |
| */ |
| |
| #endif /* _LUSTRE_FIEMAP_H */ |