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 xfs_aligned_fsb_count(
32 xfs_fileoff_t offset_fsb,
33 xfs_filblks_t count_fsb,
34 xfs_extlen_t extsz)
35 {
36 if (extsz) {
37 xfs_extlen_t align;
38
39 div_u64_rem(offset_fsb, extsz, &align);
40 if (align)
41 count_fsb += align;
42 div_u64_rem(count_fsb, extsz, &align);
43 if (align)
44 count_fsb += extsz - align;
45 }
46
47 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__*/
59
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