1/*
 2 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 3 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 4 *
 5 * This copyrighted material is made available to anyone wishing to use,
 6 * modify, copy, or redistribute it subject to the terms and conditions
 7 * of the GNU General Public License version 2.
 8 */
 9
10#ifndef __BMAP_DOT_H__
11#define __BMAP_DOT_H__
12
13#include <linux/iomap.h>
14
15#include "inode.h"
16
17struct inode;
18struct gfs2_inode;
19struct page;
20
21
22/**
23 * gfs2_write_calc_reserv - calculate number of blocks needed to write to a file
24 * @ip: the file
25 * @len: the number of bytes to be written to the file
26 * @data_blocks: returns the number of data blocks required
27 * @ind_blocks: returns the number of indirect blocks required
28 *
29 */
30
31static inline void gfs2_write_calc_reserv(const struct gfs2_inode *ip,
32					  unsigned int len,
33					  unsigned int *data_blocks,
34					  unsigned int *ind_blocks)
35{
36	const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
37	unsigned int tmp;
38
39	BUG_ON(gfs2_is_dir(ip));
40	*data_blocks = (len >> sdp->sd_sb.sb_bsize_shift) + 3;
41	*ind_blocks = 3 * (sdp->sd_max_height - 1);
42
43	for (tmp = *data_blocks; tmp > sdp->sd_diptrs;) {
44		tmp = DIV_ROUND_UP(tmp, sdp->sd_inptrs);
45		*ind_blocks += tmp;
46	}
47}
48
49extern int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page);
50extern int gfs2_block_map(struct inode *inode, sector_t lblock,
51			  struct buffer_head *bh, int create);
52extern int gfs2_iomap_begin(struct inode *inode, loff_t pos, loff_t length,
53			    unsigned flags, struct iomap *iomap);
54extern int gfs2_extent_map(struct inode *inode, u64 lblock, int *new,
55			   u64 *dblock, unsigned *extlen);
56extern int gfs2_setattr_size(struct inode *inode, u64 size);
57extern void gfs2_trim_blocks(struct inode *inode);
58extern int gfs2_truncatei_resume(struct gfs2_inode *ip);
59extern int gfs2_file_dealloc(struct gfs2_inode *ip);
60extern int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset,
61				     unsigned int len);
62extern int gfs2_map_journal_extents(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd);
63extern void gfs2_free_journal_extents(struct gfs2_jdesc *jd);
64extern int __gfs2_punch_hole(struct file *file, loff_t offset, loff_t length);
 
 
 
 
 
 
65
66#endif /* __BMAP_DOT_H__ */

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 4 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 
 
 
 
 5 */
 6
 7#ifndef __BMAP_DOT_H__
 8#define __BMAP_DOT_H__
 9
10#include <linux/iomap.h>
11
12#include "inode.h"
13
14struct inode;
15struct gfs2_inode;
16struct page;
17
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
28static 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
46extern const struct iomap_ops gfs2_iomap_ops;
47extern const struct iomap_writeback_ops gfs2_writeback_ops;
48
49int gfs2_unstuff_dinode(struct gfs2_inode *ip);
50int gfs2_block_map(struct inode *inode, sector_t lblock,
51		   struct buffer_head *bh, int create);
52int gfs2_iomap_get(struct inode *inode, loff_t pos, loff_t length,
53		   struct iomap *iomap);
54int gfs2_iomap_alloc(struct inode *inode, loff_t pos, loff_t length,
55		     struct iomap *iomap);
56int gfs2_get_extent(struct inode *inode, u64 lblock, u64 *dblock,
57		    unsigned int *extlen);
58int gfs2_alloc_extent(struct inode *inode, u64 lblock, u64 *dblock,
59		      unsigned *extlen, bool *new);
60int gfs2_setattr_size(struct inode *inode, u64 size);
61int gfs2_truncatei_resume(struct gfs2_inode *ip);
62int gfs2_file_dealloc(struct gfs2_inode *ip);
63int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset,
64			      unsigned int len);
65int gfs2_map_journal_extents(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd);
66void gfs2_free_journal_extents(struct gfs2_jdesc *jd);
67int __gfs2_punch_hole(struct file *file, loff_t offset, loff_t length);
68
69#endif /* __BMAP_DOT_H__ */