projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | 46 | extern const struct iomap_ops gfs2_iomap_ops; |
| 2164f9b9 | 47 | extern const struct iomap_writeback_ops gfs2_writeback_ops; |
| 628e366d | 48 | |
| 0b2355fe AG |
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); | |
| b3b94faa | 68 | |
| b3b94faa | 69 | #endif /* __BMAP_DOT_H__ */ |