cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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bmap.h (2367B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
      4 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
      5 */
      6
      7#ifndef __BMAP_DOT_H__
      8#define __BMAP_DOT_H__
      9
     10#include <linux/iomap.h>
     11
     12#include "inode.h"
     13
     14struct inode;
     15struct gfs2_inode;
     16struct page;
     17
     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
     28static 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
     46extern const struct iomap_ops gfs2_iomap_ops;
     47extern const struct iomap_writeback_ops gfs2_writeback_ops;
     48
     49extern int gfs2_unstuff_dinode(struct gfs2_inode *ip);
     50extern int gfs2_block_map(struct inode *inode, sector_t lblock,
     51			  struct buffer_head *bh, int create);
     52extern int gfs2_iomap_get(struct inode *inode, loff_t pos, loff_t length,
     53			  struct iomap *iomap);
     54extern int gfs2_iomap_alloc(struct inode *inode, loff_t pos, loff_t length,
     55			    struct iomap *iomap);
     56extern int gfs2_get_extent(struct inode *inode, u64 lblock, u64 *dblock,
     57			   unsigned int *extlen);
     58extern int gfs2_alloc_extent(struct inode *inode, u64 lblock, u64 *dblock,
     59			     unsigned *extlen, bool *new);
     60extern int gfs2_setattr_size(struct inode *inode, u64 size);
     61extern void gfs2_trim_blocks(struct inode *inode);
     62extern int gfs2_truncatei_resume(struct gfs2_inode *ip);
     63extern int gfs2_file_dealloc(struct gfs2_inode *ip);
     64extern int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset,
     65				     unsigned int len);
     66extern int gfs2_map_journal_extents(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd);
     67extern void gfs2_free_journal_extents(struct gfs2_jdesc *jd);
     68extern int __gfs2_punch_hole(struct file *file, loff_t offset, loff_t length);
     69
     70#endif /* __BMAP_DOT_H__ */