1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4*4882a593Smuzhiyun * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #ifndef __BMAP_DOT_H__
8*4882a593Smuzhiyun #define __BMAP_DOT_H__
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/iomap.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include "inode.h"
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun struct inode;
15*4882a593Smuzhiyun struct gfs2_inode;
16*4882a593Smuzhiyun struct page;
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun /**
20*4882a593Smuzhiyun * gfs2_write_calc_reserv - calculate number of blocks needed to write to a file
21*4882a593Smuzhiyun * @ip: the file
22*4882a593Smuzhiyun * @len: the number of bytes to be written to the file
23*4882a593Smuzhiyun * @data_blocks: returns the number of data blocks required
24*4882a593Smuzhiyun * @ind_blocks: returns the number of indirect blocks required
25*4882a593Smuzhiyun *
26*4882a593Smuzhiyun */
27*4882a593Smuzhiyun
gfs2_write_calc_reserv(const struct gfs2_inode * ip,unsigned int len,unsigned int * data_blocks,unsigned int * ind_blocks)28*4882a593Smuzhiyun static inline void gfs2_write_calc_reserv(const struct gfs2_inode *ip,
29*4882a593Smuzhiyun unsigned int len,
30*4882a593Smuzhiyun unsigned int *data_blocks,
31*4882a593Smuzhiyun unsigned int *ind_blocks)
32*4882a593Smuzhiyun {
33*4882a593Smuzhiyun const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
34*4882a593Smuzhiyun unsigned int tmp;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun BUG_ON(gfs2_is_dir(ip));
37*4882a593Smuzhiyun *data_blocks = (len >> sdp->sd_sb.sb_bsize_shift) + 3;
38*4882a593Smuzhiyun *ind_blocks = 3 * (sdp->sd_max_height - 1);
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun for (tmp = *data_blocks; tmp > sdp->sd_diptrs;) {
41*4882a593Smuzhiyun tmp = DIV_ROUND_UP(tmp, sdp->sd_inptrs);
42*4882a593Smuzhiyun *ind_blocks += tmp;
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun extern const struct iomap_ops gfs2_iomap_ops;
47*4882a593Smuzhiyun extern const struct iomap_writeback_ops gfs2_writeback_ops;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun extern int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page);
50*4882a593Smuzhiyun extern int gfs2_block_map(struct inode *inode, sector_t lblock,
51*4882a593Smuzhiyun struct buffer_head *bh, int create);
52*4882a593Smuzhiyun extern int gfs2_iomap_get_alloc(struct inode *inode, loff_t pos, loff_t length,
53*4882a593Smuzhiyun struct iomap *iomap);
54*4882a593Smuzhiyun extern int gfs2_extent_map(struct inode *inode, u64 lblock, int *new,
55*4882a593Smuzhiyun u64 *dblock, unsigned *extlen);
56*4882a593Smuzhiyun extern int gfs2_setattr_size(struct inode *inode, u64 size);
57*4882a593Smuzhiyun extern void gfs2_trim_blocks(struct inode *inode);
58*4882a593Smuzhiyun extern int gfs2_truncatei_resume(struct gfs2_inode *ip);
59*4882a593Smuzhiyun extern int gfs2_file_dealloc(struct gfs2_inode *ip);
60*4882a593Smuzhiyun extern int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset,
61*4882a593Smuzhiyun unsigned int len);
62*4882a593Smuzhiyun extern int gfs2_map_journal_extents(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd);
63*4882a593Smuzhiyun extern void gfs2_free_journal_extents(struct gfs2_jdesc *jd);
64*4882a593Smuzhiyun extern int __gfs2_punch_hole(struct file *file, loff_t offset, loff_t length);
65*4882a593Smuzhiyun extern int gfs2_lblk_to_dblk(struct inode *inode, u32 lblock, u64 *dblock);
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun #endif /* __BMAP_DOT_H__ */
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