2019-05-31 08:09:56 +00:00
|
|
|
/* SPDX-License-Identifier: GPL-2.0-only */
|
2006-01-16 16:50:04 +00:00
|
|
|
/*
|
|
|
|
|
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
2006-05-18 19:09:15 +00:00
|
|
|
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
|
2006-01-16 16:50:04 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#ifndef __BMAP_DOT_H__
|
|
|
|
|
#define __BMAP_DOT_H__
|
|
|
|
|
|
2017-02-16 15:27:16 +00:00
|
|
|
#include <linux/iomap.h>
|
|
|
|
|
|
2008-12-10 10:28:10 +00:00
|
|
|
#include "inode.h"
|
|
|
|
|
|
2006-09-05 14:39:21 +00:00
|
|
|
struct inode;
|
|
|
|
|
struct gfs2_inode;
|
|
|
|
|
struct page;
|
|
|
|
|
|
2008-12-10 10:28:10 +00:00
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* gfs2_write_calc_reserv - calculate number of blocks needed to write to a file
|
|
|
|
|
* @ip: the file
|
|
|
|
|
* @len: the number of bytes to be written to the file
|
|
|
|
|
* @data_blocks: returns the number of data blocks required
|
|
|
|
|
* @ind_blocks: returns the number of indirect blocks required
|
|
|
|
|
*
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
static inline void gfs2_write_calc_reserv(const struct gfs2_inode *ip,
|
|
|
|
|
unsigned int len,
|
|
|
|
|
unsigned int *data_blocks,
|
|
|
|
|
unsigned int *ind_blocks)
|
|
|
|
|
{
|
|
|
|
|
const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
|
|
|
unsigned int tmp;
|
|
|
|
|
|
|
|
|
|
BUG_ON(gfs2_is_dir(ip));
|
|
|
|
|
*data_blocks = (len >> sdp->sd_sb.sb_bsize_shift) + 3;
|
|
|
|
|
*ind_blocks = 3 * (sdp->sd_max_height - 1);
|
|
|
|
|
|
|
|
|
|
for (tmp = *data_blocks; tmp > sdp->sd_diptrs;) {
|
|
|
|
|
tmp = DIV_ROUND_UP(tmp, sdp->sd_inptrs);
|
|
|
|
|
*ind_blocks += tmp;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2018-06-04 12:56:51 +00:00
|
|
|
extern const struct iomap_ops gfs2_iomap_ops;
|
2019-07-01 21:54:39 +00:00
|
|
|
extern const struct iomap_writeback_ops gfs2_writeback_ops;
|
2018-06-04 12:56:51 +00:00
|
|
|
|
2021-06-17 19:36:50 +00:00
|
|
|
extern int gfs2_unstuff_dinode(struct gfs2_inode *ip);
|
2010-08-11 08:37:53 +00:00
|
|
|
extern int gfs2_block_map(struct inode *inode, sector_t lblock,
|
|
|
|
|
struct buffer_head *bh, int create);
|
2021-03-27 20:56:40 +00:00
|
|
|
extern int gfs2_iomap_get(struct inode *inode, loff_t pos, loff_t length,
|
|
|
|
|
struct iomap *iomap);
|
|
|
|
|
extern int gfs2_iomap_alloc(struct inode *inode, loff_t pos, loff_t length,
|
|
|
|
|
struct iomap *iomap);
|
2021-03-31 21:17:38 +00:00
|
|
|
extern int gfs2_get_extent(struct inode *inode, u64 lblock, u64 *dblock,
|
|
|
|
|
unsigned int *extlen);
|
|
|
|
|
extern int gfs2_alloc_extent(struct inode *inode, u64 lblock, u64 *dblock,
|
|
|
|
|
unsigned *extlen, bool *new);
|
2010-08-11 08:37:53 +00:00
|
|
|
extern int gfs2_setattr_size(struct inode *inode, u64 size);
|
|
|
|
|
extern void gfs2_trim_blocks(struct inode *inode);
|
|
|
|
|
extern int gfs2_truncatei_resume(struct gfs2_inode *ip);
|
|
|
|
|
extern int gfs2_file_dealloc(struct gfs2_inode *ip);
|
|
|
|
|
extern int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset,
|
|
|
|
|
unsigned int len);
|
2014-03-03 13:35:57 +00:00
|
|
|
extern int gfs2_map_journal_extents(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd);
|
|
|
|
|
extern void gfs2_free_journal_extents(struct gfs2_jdesc *jd);
|
2017-12-14 16:11:03 +00:00
|
|
|
extern int __gfs2_punch_hole(struct file *file, loff_t offset, loff_t length);
|
2006-01-16 16:50:04 +00:00
|
|
|
|
|
|
|
|
#endif /* __BMAP_DOT_H__ */
|
