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67 lines
2.2 KiB
67 lines
2.2 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
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* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
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*/ |
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#ifndef __BMAP_DOT_H__ |
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#define __BMAP_DOT_H__ |
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#include <linux/iomap.h> |
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#include "inode.h" |
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struct inode; |
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struct gfs2_inode; |
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struct page; |
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/** |
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* gfs2_write_calc_reserv - calculate number of blocks needed to write to a file |
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* @ip: the file |
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* @len: the number of bytes to be written to the file |
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* @data_blocks: returns the number of data blocks required |
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* @ind_blocks: returns the number of indirect blocks required |
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* |
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*/ |
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static inline void gfs2_write_calc_reserv(const struct gfs2_inode *ip, |
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unsigned int len, |
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unsigned int *data_blocks, |
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unsigned int *ind_blocks) |
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{ |
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const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
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unsigned int tmp; |
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BUG_ON(gfs2_is_dir(ip)); |
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*data_blocks = (len >> sdp->sd_sb.sb_bsize_shift) + 3; |
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*ind_blocks = 3 * (sdp->sd_max_height - 1); |
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for (tmp = *data_blocks; tmp > sdp->sd_diptrs;) { |
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tmp = DIV_ROUND_UP(tmp, sdp->sd_inptrs); |
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*ind_blocks += tmp; |
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} |
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} |
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extern const struct iomap_ops gfs2_iomap_ops; |
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extern const struct iomap_writeback_ops gfs2_writeback_ops; |
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extern int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page); |
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extern int gfs2_block_map(struct inode *inode, sector_t lblock, |
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struct buffer_head *bh, int create); |
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extern int gfs2_iomap_get_alloc(struct inode *inode, loff_t pos, loff_t length, |
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struct iomap *iomap); |
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extern int gfs2_extent_map(struct inode *inode, u64 lblock, int *new, |
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u64 *dblock, unsigned *extlen); |
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extern int gfs2_setattr_size(struct inode *inode, u64 size); |
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extern void gfs2_trim_blocks(struct inode *inode); |
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extern int gfs2_truncatei_resume(struct gfs2_inode *ip); |
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extern int gfs2_file_dealloc(struct gfs2_inode *ip); |
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extern int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset, |
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unsigned int len); |
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extern int gfs2_map_journal_extents(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd); |
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extern void gfs2_free_journal_extents(struct gfs2_jdesc *jd); |
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extern int __gfs2_punch_hole(struct file *file, loff_t offset, loff_t length); |
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extern int gfs2_lblk_to_dblk(struct inode *inode, u32 lblock, u64 *dblock); |
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#endif /* __BMAP_DOT_H__ */
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