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 | |
14 | struct inode; |
15 | struct gfs2_inode; |
16 | struct 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 | |
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(inode: &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 | |
46 | extern const struct iomap_ops gfs2_iomap_ops; |
47 | extern const struct iomap_writeback_ops gfs2_writeback_ops; |
48 | |
49 | int gfs2_unstuff_dinode(struct gfs2_inode *ip); |
50 | int gfs2_block_map(struct inode *inode, sector_t lblock, |
51 | struct buffer_head *bh, int create); |
52 | int gfs2_iomap_get(struct inode *inode, loff_t pos, loff_t length, |
53 | struct iomap *iomap); |
54 | int gfs2_iomap_alloc(struct inode *inode, loff_t pos, loff_t length, |
55 | struct iomap *iomap); |
56 | int gfs2_get_extent(struct inode *inode, u64 lblock, u64 *dblock, |
57 | unsigned int *extlen); |
58 | int gfs2_alloc_extent(struct inode *inode, u64 lblock, u64 *dblock, |
59 | unsigned *extlen, bool *new); |
60 | int gfs2_setattr_size(struct inode *inode, u64 size); |
61 | int gfs2_truncatei_resume(struct gfs2_inode *ip); |
62 | int gfs2_file_dealloc(struct gfs2_inode *ip); |
63 | int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset, |
64 | unsigned int len); |
65 | int gfs2_map_journal_extents(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd); |
66 | void gfs2_free_journal_extents(struct gfs2_jdesc *jd); |
67 | int __gfs2_punch_hole(struct file *file, loff_t offset, loff_t length); |
68 | |
69 | #endif /* __BMAP_DOT_H__ */ |
70 | |