fs/xfs/xfs_aops.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2005-2006 Silicon Graphics, Inc.
   4  * All Rights Reserved.
   5  */
   6 #ifndef __XFS_AOPS_H__
   7 #define __XFS_AOPS_H__
   8
   9 extern struct bio_set xfs_ioend_bioset;
  10
  11 /*
  12  * Types of I/O for bmap clustering and I/O completion tracking.
  13  */
  14 enum {
  15         XFS_IO_INVALID,         /* initial state */
  16         XFS_IO_DELALLOC,        /* covers delalloc region */
  17         XFS_IO_UNWRITTEN,       /* covers allocated but uninitialized data */
  18         XFS_IO_OVERWRITE,       /* covers already allocated extent */
  19         XFS_IO_COW,             /* covers copy-on-write extent */
  20         XFS_IO_HOLE,            /* covers region without any block allocation */
  21 };
  22
  23 #define XFS_IO_TYPES \
  24         { XFS_IO_INVALID,               "invalid" }, \
  25         { XFS_IO_DELALLOC,              "delalloc" }, \
  26         { XFS_IO_UNWRITTEN,             "unwritten" }, \
  27         { XFS_IO_OVERWRITE,             "overwrite" }, \
  28         { XFS_IO_COW,                   "CoW" }, \
  29         { XFS_IO_HOLE,                  "hole" }
  30
  31 /*
  32  * Structure for buffered I/O completions.
  33  */
  34 struct xfs_ioend {
  35         struct list_head        io_list;        /* next ioend in chain */
  36         unsigned int            io_type;        /* delalloc / unwritten */
  37         struct inode            *io_inode;      /* file being written to */
  38         size_t                  io_size;        /* size of the extent */
  39         xfs_off_t               io_offset;      /* offset in the file */
  40         struct work_struct      io_work;        /* xfsdatad work queue */
  41         struct xfs_trans        *io_append_trans;/* xact. for size update */
  42         struct bio              *io_bio;        /* bio being built */
  43         struct bio              io_inline_bio;  /* MUST BE LAST! */
  44 };
  45
  46 extern const struct address_space_operations xfs_address_space_operations;
  47 extern const struct address_space_operations xfs_dax_aops;
  48
  49 int     xfs_setfilesize(struct xfs_inode *ip, xfs_off_t offset, size_t size);
  50
  51 extern void xfs_count_page_state(struct page *, int *, int *);
  52 extern struct block_device *xfs_find_bdev_for_inode(struct inode *);
  53 extern struct dax_device *xfs_find_daxdev_for_inode(struct inode *);
  54
  55 #endif /* __XFS_AOPS_H__ */