LXR linux/fs/xfs/xfs_bmap

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
   4 * All Rights Reserved.
   5 */
   6#ifndef __XFS_BMAP_UTIL_H__
   7#define __XFS_BMAP_UTIL_H__
   8
   9/* Kernel only BMAP related definitions and functions */
  10
  11struct xfs_bmbt_irec;
  12struct xfs_extent_free_item;
  13struct xfs_ifork;
  14struct xfs_inode;
  15struct xfs_mount;
  16struct xfs_trans;
  17struct xfs_bmalloca;
  18
  19#ifdef CONFIG_XFS_RT
  20int     xfs_bmap_rtalloc(struct xfs_bmalloca *ap);
  21#else /* !CONFIG_XFS_RT */
  22/*
  23 * Attempts to allocate RT extents when RT is disable indicates corruption and
  24 * should trigger a shutdown.
  25 */
  26static inline int
  27xfs_bmap_rtalloc(struct xfs_bmalloca *ap)
  28{
  29        return -EFSCORRUPTED;
  30}
  31#endif /* CONFIG_XFS_RT */
  32
  33int     xfs_bmap_eof(struct xfs_inode *ip, xfs_fileoff_t endoff,
  34                     int whichfork, int *eof);
  35int     xfs_bmap_punch_delalloc_range(struct xfs_inode *ip,
  36                xfs_fileoff_t start_fsb, xfs_fileoff_t length);
  37
  38struct kgetbmap {
  39        __s64           bmv_offset;     /* file offset of segment in blocks */
  40        __s64           bmv_block;      /* starting block (64-bit daddr_t)  */
  41        __s64           bmv_length;     /* length of segment, blocks        */
  42        __s32           bmv_oflags;     /* output flags */
  43};
  44int     xfs_getbmap(struct xfs_inode *ip, struct getbmapx *bmv,
  45                struct kgetbmap *out);
  46
  47/* functions in xfs_bmap.c that are only needed by xfs_bmap_util.c */
  48int     xfs_bmap_extsize_align(struct xfs_mount *mp, struct xfs_bmbt_irec *gotp,
  49                               struct xfs_bmbt_irec *prevp, xfs_extlen_t extsz,
  50                               int rt, int eof, int delay, int convert,
  51                               xfs_fileoff_t *offp, xfs_extlen_t *lenp);
  52void    xfs_bmap_adjacent(struct xfs_bmalloca *ap);
  53int     xfs_bmap_last_extent(struct xfs_trans *tp, struct xfs_inode *ip,
  54                             int whichfork, struct xfs_bmbt_irec *rec,
  55                             int *is_empty);
  56
  57/* preallocation and hole punch interface */
  58int     xfs_alloc_file_space(struct xfs_inode *ip, xfs_off_t offset,
  59                             xfs_off_t len, int alloc_type);
  60int     xfs_free_file_space(struct xfs_inode *ip, xfs_off_t offset,
  61                            xfs_off_t len);
  62int     xfs_zero_file_space(struct xfs_inode *ip, xfs_off_t offset,
  63                            xfs_off_t len);
  64int     xfs_collapse_file_space(struct xfs_inode *, xfs_off_t offset,
  65                                xfs_off_t len);
  66int     xfs_insert_file_space(struct xfs_inode *, xfs_off_t offset,
  67                                xfs_off_t len);
  68
  69/* EOF block manipulation functions */
  70bool    xfs_can_free_eofblocks(struct xfs_inode *ip, bool force);
  71int     xfs_free_eofblocks(struct xfs_inode *ip);
  72
  73int     xfs_swap_extents(struct xfs_inode *ip, struct xfs_inode *tip,
  74                         struct xfs_swapext *sx);
  75
  76xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb);
  77
  78xfs_extnum_t xfs_bmap_count_leaves(struct xfs_ifork *ifp, xfs_filblks_t *count);
  79int xfs_bmap_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
  80                          int whichfork, xfs_extnum_t *nextents,
  81                          xfs_filblks_t *count);
  82
  83int     xfs_flush_unmap_range(struct xfs_inode *ip, xfs_off_t offset,
  84                              xfs_off_t len);
  85
  86#endif  /* __XFS_BMAP_UTIL_H__ */
  87