/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) 2018-2023 Oracle. All Rights Reserved. * Author: Darrick J. Wong <djwong@kernel.org> */ #ifndef __XFS_SCRUB_XFILE_H__ #define __XFS_SCRUB_XFILE_H__ struct xfile_page { struct page *page; void *fsdata; loff_t pos; }; static inline bool xfile_page_cached(const struct xfile_page *xfpage) { return xfpage->page != NULL; } static inline pgoff_t xfile_page_index(const struct xfile_page *xfpage) { return xfpage->page->index; } struct xfile { struct file *file; }; int xfile_create(const char *description, loff_t isize, struct xfile **xfilep); void xfile_destroy(struct xfile *xf); ssize_t xfile_pread(struct xfile *xf, void *buf, size_t count, loff_t pos); ssize_t xfile_pwrite(struct xfile *xf, const void *buf, size_t count, loff_t pos); /* * Load an object. Since we're treating this file as "memory", any error or * short IO is treated as a failure to allocate memory. */ static inline int xfile_obj_load(struct xfile *xf, void *buf, size_t count, loff_t pos) { ssize_t ret = xfile_pread(xf, buf, count, pos); if (ret < 0 || ret != count) return -ENOMEM; return 0; } /* * Store an object. Since we're treating this file as "memory", any error or * short IO is treated as a failure to allocate memory. */ static inline int xfile_obj_store(struct xfile *xf, const void *buf, size_t count, loff_t pos) { ssize_t ret = xfile_pwrite(xf, buf, count, pos); if (ret < 0 || ret != count) return -ENOMEM; return 0; } loff_t xfile_seek_data(struct xfile *xf, loff_t pos); struct xfile_stat { loff_t size; unsigned long long bytes; }; int xfile_stat(struct xfile *xf, struct xfile_stat *statbuf); int xfile_get_page(struct xfile *xf, loff_t offset, unsigned int len, struct xfile_page *xbuf); int xfile_put_page(struct xfile *xf, struct xfile_page *xbuf); #endif /* __XFS_SCRUB_XFILE_H__ */