fs/xfs/scrub/xfile.h

   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__ */