| David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
| Steven Whitehouse | 3a8a9a1 | 2006-05-18 15:09:15 -0400 | [diff] [blame] | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
| David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 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 |
| Steven Whitehouse | e9fc2aa | 2006-09-01 11:05:15 -0400 | [diff] [blame] | 7 | * of the GNU General Public License version 2. |
| David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | #ifndef __BMAP_DOT_H__ |
| 11 | #define __BMAP_DOT_H__ |
| 12 | |
| Steven Whitehouse | 7ed122e | 2008-12-10 10:28:10 +0000 | [diff] [blame] | 13 | #include "inode.h" |
| 14 | |
| Steven Whitehouse | f2f7ba5 | 2006-09-05 10:39:21 -0400 | [diff] [blame] | 15 | struct inode; |
| 16 | struct gfs2_inode; |
| 17 | struct page; |
| 18 | |
| Steven Whitehouse | 7ed122e | 2008-12-10 10:28:10 +0000 | [diff] [blame] | 19 | |
| 20 | /** |
| 21 | * gfs2_write_calc_reserv - calculate number of blocks needed to write to a file |
| 22 | * @ip: the file |
| 23 | * @len: the number of bytes to be written to the file |
| 24 | * @data_blocks: returns the number of data blocks required |
| 25 | * @ind_blocks: returns the number of indirect blocks required |
| 26 | * |
| 27 | */ |
| 28 | |
| 29 | static inline void gfs2_write_calc_reserv(const struct gfs2_inode *ip, |
| 30 | unsigned int len, |
| 31 | unsigned int *data_blocks, |
| 32 | unsigned int *ind_blocks) |
| 33 | { |
| 34 | const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
| 35 | unsigned int tmp; |
| 36 | |
| 37 | BUG_ON(gfs2_is_dir(ip)); |
| 38 | *data_blocks = (len >> sdp->sd_sb.sb_bsize_shift) + 3; |
| 39 | *ind_blocks = 3 * (sdp->sd_max_height - 1); |
| 40 | |
| 41 | for (tmp = *data_blocks; tmp > sdp->sd_diptrs;) { |
| 42 | tmp = DIV_ROUND_UP(tmp, sdp->sd_inptrs); |
| 43 | *ind_blocks += tmp; |
| 44 | } |
| 45 | } |
| 46 | |
| Steven Whitehouse | ff8f33c | 2010-08-11 09:37:53 +0100 | [diff] [blame] | 47 | extern int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page); |
| 48 | extern int gfs2_block_map(struct inode *inode, sector_t lblock, |
| 49 | struct buffer_head *bh, int create); |
| 50 | extern int gfs2_extent_map(struct inode *inode, u64 lblock, int *new, |
| 51 | u64 *dblock, unsigned *extlen); |
| 52 | extern int gfs2_setattr_size(struct inode *inode, u64 size); |
| 53 | extern void gfs2_trim_blocks(struct inode *inode); |
| 54 | extern int gfs2_truncatei_resume(struct gfs2_inode *ip); |
| 55 | extern int gfs2_file_dealloc(struct gfs2_inode *ip); |
| 56 | extern int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset, |
| 57 | unsigned int len); |
| David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 58 | |
| David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 59 | #endif /* __BMAP_DOT_H__ */ |