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7336d0e6 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
b3b94faa DT |
2 | /* |
3 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3a8a9a10 | 4 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
5 | */ |
6 | ||
7 | #ifndef __BMAP_DOT_H__ | |
8 | #define __BMAP_DOT_H__ | |
9 | ||
3974320c BP |
10 | #include <linux/iomap.h> |
11 | ||
7ed122e4 SW |
12 | #include "inode.h" |
13 | ||
f2f7ba52 SW |
14 | struct inode; |
15 | struct gfs2_inode; | |
16 | struct page; | |
17 | ||
7ed122e4 SW |
18 | |
19 | /** | |
20 | * gfs2_write_calc_reserv - calculate number of blocks needed to write to a file | |
21 | * @ip: the file | |
22 | * @len: the number of bytes to be written to the file | |
23 | * @data_blocks: returns the number of data blocks required | |
24 | * @ind_blocks: returns the number of indirect blocks required | |
25 | * | |
26 | */ | |
27 | ||
28 | static inline void gfs2_write_calc_reserv(const struct gfs2_inode *ip, | |
29 | unsigned int len, | |
30 | unsigned int *data_blocks, | |
31 | unsigned int *ind_blocks) | |
32 | { | |
33 | const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
34 | unsigned int tmp; | |
35 | ||
36 | BUG_ON(gfs2_is_dir(ip)); | |
37 | *data_blocks = (len >> sdp->sd_sb.sb_bsize_shift) + 3; | |
38 | *ind_blocks = 3 * (sdp->sd_max_height - 1); | |
39 | ||
40 | for (tmp = *data_blocks; tmp > sdp->sd_diptrs;) { | |
41 | tmp = DIV_ROUND_UP(tmp, sdp->sd_inptrs); | |
42 | *ind_blocks += tmp; | |
43 | } | |
44 | } | |
45 | ||
628e366d AG |
46 | extern const struct iomap_ops gfs2_iomap_ops; |
47 | ||
ff8f33c8 SW |
48 | extern int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page); |
49 | extern int gfs2_block_map(struct inode *inode, sector_t lblock, | |
50 | struct buffer_head *bh, int create); | |
628e366d AG |
51 | extern int gfs2_iomap_get_alloc(struct inode *inode, loff_t pos, loff_t length, |
52 | struct iomap *iomap); | |
ff8f33c8 SW |
53 | extern int gfs2_extent_map(struct inode *inode, u64 lblock, int *new, |
54 | u64 *dblock, unsigned *extlen); | |
55 | extern int gfs2_setattr_size(struct inode *inode, u64 size); | |
56 | extern void gfs2_trim_blocks(struct inode *inode); | |
57 | extern int gfs2_truncatei_resume(struct gfs2_inode *ip); | |
58 | extern int gfs2_file_dealloc(struct gfs2_inode *ip); | |
59 | extern int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset, | |
60 | unsigned int len); | |
b50f227b SW |
61 | extern int gfs2_map_journal_extents(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd); |
62 | extern void gfs2_free_journal_extents(struct gfs2_jdesc *jd); | |
4e56a641 | 63 | extern int __gfs2_punch_hole(struct file *file, loff_t offset, loff_t length); |
7c70b896 | 64 | extern int gfs2_lblk_to_dblk(struct inode *inode, u32 lblock, u64 *dblock); |
b3b94faa | 65 | |
b3b94faa | 66 | #endif /* __BMAP_DOT_H__ */ |