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| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
|---|---|
| 2 | /* |
| 3 | * Copyright (C) 2018-2023 Oracle. All Rights Reserved. |
| 4 | * Author: Darrick J. Wong <djwong@kernel.org> |
| 5 | */ |
| 6 | #ifndef __XFS_SCRUB_XFILE_H__ |
| 7 | #define __XFS_SCRUB_XFILE_H__ |
| 8 | |
| 9 | struct xfile { |
| 10 | struct file *file; |
| 11 | }; |
| 12 | |
| 13 | int xfile_create(const char *description, loff_t isize, struct xfile **xfilep); |
| 14 | void xfile_destroy(struct xfile *xf); |
| 15 | |
| 16 | int xfile_load(struct xfile *xf, void *buf, size_t count, loff_t pos); |
| 17 | int xfile_store(struct xfile *xf, const void *buf, size_t count, |
| 18 | loff_t pos); |
| 19 | |
| 20 | void xfile_discard(struct xfile *xf, loff_t pos, u64 count); |
| 21 | loff_t xfile_seek_data(struct xfile *xf, loff_t pos); |
| 22 | |
| 23 | #define XFILE_MAX_FOLIO_SIZE (PAGE_SIZE << MAX_PAGECACHE_ORDER) |
| 24 | |
| 25 | #define XFILE_ALLOC (1 << 0) /* allocate folio if not present */ |
| 26 | struct folio *xfile_get_folio(struct xfile *xf, loff_t offset, size_t len, |
| 27 | unsigned int flags); |
| 28 | void xfile_put_folio(struct xfile *xf, struct folio *folio); |
| 29 | |
| 30 | static inline unsigned long long xfile_bytes(struct xfile *xf) |
| 31 | { |
| 32 | return file_inode(xf->file)->i_blocks << SECTOR_SHIFT; |
| 33 | } |
| 34 | |
| 35 | #endif /* __XFS_SCRUB_XFILE_H__ */ |
| 36 |
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