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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