https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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- v2.6.20-rc4
- v2.6.20-rc3
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Tip revision: bc33b0ca11e3df467777a4fa7639ba488c9d4911 authored by Linus Torvalds on 05 November 2016, 23:23:36 UTC
Linux 4.9-rc4
Linux 4.9-rc4
Tip revision: bc33b0c
bmap.h
/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License version 2.
*/
#ifndef __BMAP_DOT_H__
#define __BMAP_DOT_H__
#include "inode.h"
struct inode;
struct gfs2_inode;
struct page;
/**
* 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;
}
}
extern int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page);
extern int gfs2_block_map(struct inode *inode, sector_t lblock,
struct buffer_head *bh, int create);
extern int gfs2_extent_map(struct inode *inode, u64 lblock, int *new,
u64 *dblock, unsigned *extlen);
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);
extern int gfs2_map_journal_extents(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd);
extern void gfs2_free_journal_extents(struct gfs2_jdesc *jd);
#endif /* __BMAP_DOT_H__ */