LXR linux/fs/xfs/xfs_bmap

   1/*
   2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
   3 * All Rights Reserved.
   4 *
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of the GNU General Public License as
   7 * published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it would be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write the Free Software Foundation,
  16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17 */
  18#ifndef __XFS_BMAP_UTIL_H__
  19#define __XFS_BMAP_UTIL_H__
  20
  21/* Kernel only BMAP related definitions and functions */
  22
  23struct xfs_bmbt_irec;
  24struct xfs_extent_free_item;
  25struct xfs_ifork;
  26struct xfs_inode;
  27struct xfs_mount;
  28struct xfs_trans;
  29struct xfs_bmalloca;
  30
  31#ifdef CONFIG_XFS_RT
  32int     xfs_bmap_rtalloc(struct xfs_bmalloca *ap);
  33#else /* !CONFIG_XFS_RT */
  34/*
  35 * Attempts to allocate RT extents when RT is disable indicates corruption and
  36 * should trigger a shutdown.
  37 */
  38static inline int
  39xfs_bmap_rtalloc(struct xfs_bmalloca *ap)
  40{
  41        return -EFSCORRUPTED;
  42}
  43#endif /* CONFIG_XFS_RT */
  44
  45int     xfs_bmap_eof(struct xfs_inode *ip, xfs_fileoff_t endoff,
  46                     int whichfork, int *eof);
  47int     xfs_bmap_punch_delalloc_range(struct xfs_inode *ip,
  48                xfs_fileoff_t start_fsb, xfs_fileoff_t length);
  49
  50/* bmap to userspace formatter - copy to user & advance pointer */
  51typedef int (*xfs_bmap_format_t)(void **, struct getbmapx *);
  52int     xfs_getbmap(struct xfs_inode *ip, struct getbmapx *bmv,
  53                xfs_bmap_format_t formatter, void *arg);
  54
  55/* functions in xfs_bmap.c that are only needed by xfs_bmap_util.c */
  56int     xfs_bmap_extsize_align(struct xfs_mount *mp, struct xfs_bmbt_irec *gotp,
  57                               struct xfs_bmbt_irec *prevp, xfs_extlen_t extsz,
  58                               int rt, int eof, int delay, int convert,
  59                               xfs_fileoff_t *offp, xfs_extlen_t *lenp);
  60void    xfs_bmap_adjacent(struct xfs_bmalloca *ap);
  61int     xfs_bmap_last_extent(struct xfs_trans *tp, struct xfs_inode *ip,
  62                             int whichfork, struct xfs_bmbt_irec *rec,
  63                             int *is_empty);
  64
  65/* preallocation and hole punch interface */
  66int     xfs_alloc_file_space(struct xfs_inode *ip, xfs_off_t offset,
  67                             xfs_off_t len, int alloc_type);
  68int     xfs_free_file_space(struct xfs_inode *ip, xfs_off_t offset,
  69                            xfs_off_t len);
  70int     xfs_zero_file_space(struct xfs_inode *ip, xfs_off_t offset,
  71                            xfs_off_t len);
  72int     xfs_collapse_file_space(struct xfs_inode *, xfs_off_t offset,
  73                                xfs_off_t len);
  74int     xfs_insert_file_space(struct xfs_inode *, xfs_off_t offset,
  75                                xfs_off_t len);
  76
  77/* EOF block manipulation functions */
  78bool    xfs_can_free_eofblocks(struct xfs_inode *ip, bool force);
  79int     xfs_free_eofblocks(struct xfs_inode *ip);
  80
  81int     xfs_swap_extents(struct xfs_inode *ip, struct xfs_inode *tip,
  82                         struct xfs_swapext *sx);
  83
  84xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb);
  85
  86xfs_extnum_t xfs_bmap_count_leaves(struct xfs_ifork *ifp, xfs_filblks_t *count);
  87int xfs_bmap_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
  88                          int whichfork, xfs_extnum_t *nextents,
  89                          xfs_filblks_t *count);
  90
  91#endif  /* __XFS_BMAP_UTIL_H__ */
  92