103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
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/* FS_IOC_FIEMAP ioctl infrastructure.
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Some portions copyright (C) 2007 Cluster File Systems, Inc
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Authors: Mark Fasheh <mfasheh@suse.com>
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Kalpak Shah <kalpak.shah@sun.com>
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Andreas Dilger <adilger@sun.com>. */
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/* Copy from kernel, modified to respect GNU code style by Jie Liu. */
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#ifndef _LINUX_FIEMAP_H
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# define _LINUX_FIEMAP_H
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# include <stdint.h>
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struct fiemap_extent
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{
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/* Logical offset in bytes for the start of the extent
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from the beginning of the file. */
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uint64_t fe_logical;
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/* Physical offset in bytes for the start of the extent
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from the beginning of the disk. */
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uint64_t fe_physical;
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/* Length in bytes for this extent. */
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uint64_t fe_length;
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uint64_t fe_reserved64[2];
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/* FIEMAP_EXTENT_* flags for this extent. */
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uint32_t fe_flags;
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uint32_t fe_reserved[3];
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};
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struct fiemap
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{
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/* Logical offset(inclusive) at which to start mapping(in). */
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uint64_t fm_start;
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/* Logical length of mapping which userspace wants(in). */
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uint64_t fm_length;
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/* FIEMAP_FLAG_* flags for request(in/out). */
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uint32_t fm_flags;
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/* Number of extents that were mapped(out). */
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uint32_t fm_mapped_extents;
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/* Size of fm_extents array(in). */
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uint32_t fm_extent_count;
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uint32_t fm_reserved;
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/* Array of mapped extents(out). */
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struct fiemap_extent fm_extents[FLEXIBLE_ARRAY_MEMBER];
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};
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/* The maximum offset can be mapped for a file. */
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# define FIEMAP_MAX_OFFSET (~0ULL)
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/* Sync file data before map. */
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# define FIEMAP_FLAG_SYNC 0x00000001
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/* Map extented attribute tree. */
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# define FIEMAP_FLAG_XATTR 0x00000002
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# define FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR)
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/* Last extent in file. */
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# define FIEMAP_EXTENT_LAST 0x00000001
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/* Data location unknown. */
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# define FIEMAP_EXTENT_UNKNOWN 0x00000002
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/* Location still pending, Sets EXTENT_UNKNOWN. */
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# define FIEMAP_EXTENT_DELALLOC 0x00000004
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/* Data cannot be read while fs is unmounted. */
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# define FIEMAP_EXTENT_ENCODED 0x00000008
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/* Data is encrypted by fs. Sets EXTENT_NO_BYPASS. */
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# define FIEMAP_EXTENT_DATA_ENCRYPTED 0x00000080
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/* Extent offsets may not be block aligned. */
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# define FIEMAP_EXTENT_NOT_ALIGNED 0x00000100
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/* Data mixed with metadata. Sets EXTENT_NOT_ALIGNED. */
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# define FIEMAP_EXTENT_DATA_INLINE 0x00000200
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/* Multiple files in block. Set EXTENT_NOT_ALIGNED. */
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# define FIEMAP_EXTENT_DATA_TAIL 0x00000400
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/* Space allocated, but not data (i.e., zero). */
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# define FIEMAP_EXTENT_UNWRITTEN 0x00000800
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/* File does not natively support extents. Result merged for efficiency. */
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# define FIEMAP_EXTENT_MERGED 0x00001000
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/* Space shared with other files. */
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# define FIEMAP_EXTENT_SHARED 0x00002000
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#endif
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