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_page { 10 struct page *page; 11 void *fsdata; 12 loff_t pos; 13 }; 14 15 static inline bool xfile_page_cached(const struct xfile_page *xfpage) 16 { 17 return xfpage->page != NULL; 18 } 19 20 static inline pgoff_t xfile_page_index(const struct xfile_page *xfpage) 21 { 22 return xfpage->page->index; 23 } 24 25 struct xfile { 26 struct file *file; 27 }; 28 29 int xfile_create(const char *description, loff_t isize, struct xfile **xfilep); 30 void xfile_destroy(struct xfile *xf); 31 32 int xfile_load(struct xfile *xf, void *buf, size_t count, loff_t pos); 33 int xfile_store(struct xfile *xf, const void *buf, size_t count, 34 loff_t pos); 35 36 loff_t xfile_seek_data(struct xfile *xf, loff_t pos); 37 38 int xfile_get_page(struct xfile *xf, loff_t offset, unsigned int len, 39 struct xfile_page *xbuf); 40 int xfile_put_page(struct xfile *xf, struct xfile_page *xbuf); 41 42 #endif /* __XFS_SCRUB_XFILE_H__ */ 43