Line data    Source code

       1             : // SPDX-License-Identifier: GPL-2.0
       2             : /*
       3             :  * Copyright (c) 2003-2005 Silicon Graphics, Inc.
       4             :  * All Rights Reserved.
       5             :  */
       6             : #ifndef __XFS_IOMAP_H__
       7             : #define __XFS_IOMAP_H__
       8             : 
       9             : #include <linux/iomap.h>
      10             : 
      11             : struct xfs_inode;
      12             : struct xfs_bmbt_irec;
      13             : 
      14             : int xfs_iomap_write_direct(struct xfs_inode *ip, xfs_fileoff_t offset_fsb,
      15             :                 xfs_fileoff_t count_fsb, unsigned int flags,
      16             :                 struct xfs_bmbt_irec *imap, u64 *sequence);
      17             : int xfs_iomap_write_unwritten(struct xfs_inode *, xfs_off_t, xfs_off_t, bool);
      18             : xfs_fileoff_t xfs_iomap_eof_align_last_fsb(struct xfs_inode *ip,
      19             :                 xfs_fileoff_t end_fsb);
      20             : 
      21             : u64 xfs_iomap_inode_sequence(struct xfs_inode *ip, u16 iomap_flags);
      22             : int xfs_bmbt_to_iomap(struct xfs_inode *ip, struct iomap *iomap,
      23             :                 struct xfs_bmbt_irec *imap, unsigned int mapping_flags,
      24             :                 u16 iomap_flags, u64 sequence_cookie);
      25             : 
      26             : int xfs_zero_range(struct xfs_inode *ip, loff_t pos, loff_t len,
      27             :                 bool *did_zero);
      28             : int xfs_truncate_page(struct xfs_inode *ip, loff_t pos, bool *did_zero);
      29             : 
      30             : static inline xfs_filblks_t
      31     9961809 : xfs_aligned_fsb_count(
      32             :         xfs_fileoff_t           offset_fsb,
      33             :         xfs_filblks_t           count_fsb,
      34             :         xfs_extlen_t            extsz)
      35             : {
      36     9961809 :         if (extsz) {
      37     8406893 :                 xfs_extlen_t    align;
      38             : 
      39     8406893 :                 div_u64_rem(offset_fsb, extsz, &align);
      40     8406896 :                 if (align)
      41      174511 :                         count_fsb += align;
      42     8406896 :                 div_u64_rem(count_fsb, extsz, &align);
      43     8406892 :                 if (align)
      44      178689 :                         count_fsb += extsz - align;
      45             :         }
      46             : 
      47     9961808 :         return count_fsb;
      48             : }
      49             : 
      50             : extern const struct iomap_ops xfs_buffered_write_iomap_ops;
      51             : extern const struct iomap_ops xfs_page_mkwrite_iomap_ops;
      52             : extern const struct iomap_ops xfs_direct_write_iomap_ops;
      53             : extern const struct iomap_ops xfs_read_iomap_ops;
      54             : extern const struct iomap_ops xfs_seek_iomap_ops;
      55             : extern const struct iomap_ops xfs_xattr_iomap_ops;
      56             : extern const struct iomap_ops xfs_dax_write_iomap_ops;
      57             : 
      58             : #endif /* __XFS_IOMAP_H__*/