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46 lines
964 B
C
46 lines
964 B
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* linux/fs/apfs/extents.h
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*
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* Copyright (C) 2018 Ernesto A. Fernández <ernesto.mnd.fernandez@gmail.com>
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*/
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#ifndef _EXTENTS_H
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#define _EXTENTS_H
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#include <linux/types.h>
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struct inode;
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struct buffer_head;
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struct apfs_query;
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/* File extent records */
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#define APFS_FILE_EXTENT_LEN_MASK 0x00ffffffffffffffULL
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#define APFS_FILE_EXTENT_FLAG_MASK 0xff00000000000000ULL
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#define APFS_FILE_EXTENT_FLAG_SHIFT 56
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/*
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* Structure of a file extent record
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*/
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struct apfs_file_extent_val {
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__le64 len_and_flags;
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__le64 phys_block_num;
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__le64 crypto_id;
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} __packed;
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/*
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* Extent record data in memory
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*/
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struct apfs_file_extent {
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u64 logical_addr;
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u64 phys_block_num;
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u64 len;
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};
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extern int apfs_extent_from_query(struct apfs_query *query,
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struct apfs_file_extent *extent);
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extern int apfs_get_block(struct inode *inode, sector_t iblock,
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struct buffer_head *bh_result, int create);
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#endif /* _EXTENTS_H */
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