fs/xfs/xfs_bmap_util.h

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * Copyright (c) 2000-2006 Silicon Graphics, Inc.
0004  * All Rights Reserved.
0005  */
0006 #ifndef __XFS_BMAP_UTIL_H__
0007 #define __XFS_BMAP_UTIL_H__
0008
0009 /* Kernel only BMAP related definitions and functions */
0010
0011 struct xfs_bmbt_irec;
0012 struct xfs_extent_free_item;
0013 struct xfs_ifork;
0014 struct xfs_inode;
0015 struct xfs_mount;
0016 struct xfs_trans;
0017 struct xfs_bmalloca;
0018
0019 #ifdef CONFIG_XFS_RT
0020 int xfs_bmap_rtalloc(struct xfs_bmalloca *ap);
0021 #else /* !CONFIG_XFS_RT */
0022 /*
0023  * Attempts to allocate RT extents when RT is disable indicates corruption and
0024  * should trigger a shutdown.
0025  */
0026 static inline int
0027 xfs_bmap_rtalloc(struct xfs_bmalloca *ap)
0028 {
0029     return -EFSCORRUPTED;
0030 }
0031 #endif /* CONFIG_XFS_RT */
0032
0033 int xfs_bmap_punch_delalloc_range(struct xfs_inode *ip,
0034         xfs_fileoff_t start_fsb, xfs_fileoff_t length);
0035
0036 struct kgetbmap {
0037     __s64       bmv_offset; /* file offset of segment in blocks */
0038     __s64       bmv_block;  /* starting block (64-bit daddr_t)  */
0039     __s64       bmv_length; /* length of segment, blocks        */
0040     __s32       bmv_oflags; /* output flags */
0041 };
0042 int xfs_getbmap(struct xfs_inode *ip, struct getbmapx *bmv,
0043         struct kgetbmap *out);
0044
0045 /* functions in xfs_bmap.c that are only needed by xfs_bmap_util.c */
0046 int xfs_bmap_extsize_align(struct xfs_mount *mp, struct xfs_bmbt_irec *gotp,
0047                    struct xfs_bmbt_irec *prevp, xfs_extlen_t extsz,
0048                    int rt, int eof, int delay, int convert,
0049                    xfs_fileoff_t *offp, xfs_extlen_t *lenp);
0050 void    xfs_bmap_adjacent(struct xfs_bmalloca *ap);
0051 int xfs_bmap_last_extent(struct xfs_trans *tp, struct xfs_inode *ip,
0052                  int whichfork, struct xfs_bmbt_irec *rec,
0053                  int *is_empty);
0054
0055 /* preallocation and hole punch interface */
0056 int xfs_alloc_file_space(struct xfs_inode *ip, xfs_off_t offset,
0057                  xfs_off_t len);
0058 int xfs_free_file_space(struct xfs_inode *ip, xfs_off_t offset,
0059                 xfs_off_t len);
0060 int xfs_collapse_file_space(struct xfs_inode *, xfs_off_t offset,
0061                 xfs_off_t len);
0062 int xfs_insert_file_space(struct xfs_inode *, xfs_off_t offset,
0063                 xfs_off_t len);
0064
0065 /* EOF block manipulation functions */
0066 bool    xfs_can_free_eofblocks(struct xfs_inode *ip, bool force);
0067 int xfs_free_eofblocks(struct xfs_inode *ip);
0068
0069 int xfs_swap_extents(struct xfs_inode *ip, struct xfs_inode *tip,
0070              struct xfs_swapext *sx);
0071
0072 xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb);
0073
0074 xfs_extnum_t xfs_bmap_count_leaves(struct xfs_ifork *ifp, xfs_filblks_t *count);
0075 int xfs_bmap_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
0076               int whichfork, xfs_extnum_t *nextents,
0077               xfs_filblks_t *count);
0078
0079 int xfs_flush_unmap_range(struct xfs_inode *ip, xfs_off_t offset,
0080                   xfs_off_t len);
0081
0082 #endif  /* __XFS_BMAP_UTIL_H__ */