fs/xfs/xfs_bmap_util.h

   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
  11 struct xfs_bmbt_irec;
  12 struct xfs_extent_free_item;
  13 struct xfs_ifork;
  14 struct xfs_inode;
  15 struct xfs_mount;
  16 struct xfs_trans;
  17 struct xfs_bmalloca;
  18
  19 #ifdef CONFIG_XFS_RT
  20 int     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  */
  26 static inline int
  27 xfs_bmap_rtalloc(struct xfs_bmalloca *ap)
  28 {
  29         return -EFSCORRUPTED;
  30 }
  31 #endif /* CONFIG_XFS_RT */
  32
  33 int     xfs_bmap_eof(struct xfs_inode *ip, xfs_fileoff_t endoff,
  34                      int whichfork, int *eof);
  35 int     xfs_bmap_punch_delalloc_range(struct xfs_inode *ip,
  36                 xfs_fileoff_t start_fsb, xfs_fileoff_t length);
  37
  38 struct 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 };
  44 int     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 */
  48 int     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);
  52 void    xfs_bmap_adjacent(struct xfs_bmalloca *ap);
  53 int     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 */
  58 int     xfs_alloc_file_space(struct xfs_inode *ip, xfs_off_t offset,
  59                              xfs_off_t len, int alloc_type);
  60 int     xfs_free_file_space(struct xfs_inode *ip, xfs_off_t offset,
  61                             xfs_off_t len);
  62 int     xfs_zero_file_space(struct xfs_inode *ip, xfs_off_t offset,
  63                             xfs_off_t len);
  64 int     xfs_collapse_file_space(struct xfs_inode *, xfs_off_t offset,
  65                                 xfs_off_t len);
  66 int     xfs_insert_file_space(struct xfs_inode *, xfs_off_t offset,
  67                                 xfs_off_t len);
  68
  69 /* EOF block manipulation functions */
  70 bool    xfs_can_free_eofblocks(struct xfs_inode *ip, bool force);
  71 int     xfs_free_eofblocks(struct xfs_inode *ip);
  72
  73 int     xfs_swap_extents(struct xfs_inode *ip, struct xfs_inode *tip,
  74                          struct xfs_swapext *sx);
  75
  76 xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb);
  77
  78 xfs_extnum_t xfs_bmap_count_leaves(struct xfs_ifork *ifp, xfs_filblks_t *count);
  79 int 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
  83 #endif  /* __XFS_BMAP_UTIL_H__ */