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
xfs_aligned_fsb_count(xfs_fileoff_t offset_fsb,xfs_filblks_t count_fsb,xfs_extlen_t extsz)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