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48 lines
1.8 KiB
48 lines
1.8 KiB
/* SPDX-License-Identifier: BSD-3-Clause */ |
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/* |
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* This is from the Android Project, |
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* Repository: https://android.googlesource.com/platform/system/core |
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* File: libsparse/sparse_format.h |
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* Commit: 28fa5bc347390480fe190294c6c385b6a9f0d68b |
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* Copyright (C) 2010 The Android Open Source Project |
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*/ |
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#ifndef _LIBSPARSE_SPARSE_FORMAT_H_ |
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#define _LIBSPARSE_SPARSE_FORMAT_H_ |
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#include "sparse_defs.h" |
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typedef struct sparse_header { |
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__le32 magic; /* 0xed26ff3a */ |
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__le16 major_version; /* (0x1) - reject images with higher major versions */ |
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__le16 minor_version; /* (0x0) - allow images with higer minor versions */ |
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__le16 file_hdr_sz; /* 28 bytes for first revision of the file format */ |
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__le16 chunk_hdr_sz; /* 12 bytes for first revision of the file format */ |
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__le32 blk_sz; /* block size in bytes, must be a multiple of 4 (4096) */ |
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__le32 total_blks; /* total blocks in the non-sparse output image */ |
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__le32 total_chunks; /* total chunks in the sparse input image */ |
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__le32 image_checksum; /* CRC32 checksum of the original data, counting "don't care" */ |
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/* as 0. Standard 802.3 polynomial, use a Public Domain */ |
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/* table implementation */ |
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} sparse_header_t; |
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#define SPARSE_HEADER_MAGIC 0xed26ff3a |
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#define CHUNK_TYPE_RAW 0xCAC1 |
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#define CHUNK_TYPE_FILL 0xCAC2 |
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#define CHUNK_TYPE_DONT_CARE 0xCAC3 |
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#define CHUNK_TYPE_CRC32 0xCAC4 |
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typedef struct chunk_header { |
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__le16 chunk_type; /* 0xCAC1 -> raw; 0xCAC2 -> fill; 0xCAC3 -> don't care */ |
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__le16 reserved1; |
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__le32 chunk_sz; /* in blocks in output image */ |
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__le32 total_sz; /* in bytes of chunk input file including chunk header and data */ |
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} chunk_header_t; |
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/* Following a Raw or Fill or CRC32 chunk is data. |
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* For a Raw chunk, it's the data in chunk_sz * blk_sz. |
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* For a Fill chunk, it's 4 bytes of the fill data. |
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* For a CRC32 chunk, it's 4 bytes of CRC32 |
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*/ |
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#endif
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