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
50struct kgetbmap {
51	__s64		bmv_offset;	/* file offset of segment in blocks */
52	__s64		bmv_block;	/* starting block (64-bit daddr_t)  */
53	__s64		bmv_length;	/* length of segment, blocks	    */
54	__s32		bmv_oflags;	/* output flags */
55};
56int	xfs_getbmap(struct xfs_inode *ip, struct getbmapx *bmv,
57		struct kgetbmap *out);
58
59/* functions in xfs_bmap.c that are only needed by xfs_bmap_util.c */
60int	xfs_bmap_extsize_align(struct xfs_mount *mp, struct xfs_bmbt_irec *gotp,
61			       struct xfs_bmbt_irec *prevp, xfs_extlen_t extsz,
62			       int rt, int eof, int delay, int convert,
63			       xfs_fileoff_t *offp, xfs_extlen_t *lenp);
64void	xfs_bmap_adjacent(struct xfs_bmalloca *ap);
65int	xfs_bmap_last_extent(struct xfs_trans *tp, struct xfs_inode *ip,
66			     int whichfork, struct xfs_bmbt_irec *rec,
67			     int *is_empty);
68
69/* preallocation and hole punch interface */
70int	xfs_alloc_file_space(struct xfs_inode *ip, xfs_off_t offset,
71			     xfs_off_t len, int alloc_type);
72int	xfs_free_file_space(struct xfs_inode *ip, xfs_off_t offset,
73			    xfs_off_t len);
74int	xfs_zero_file_space(struct xfs_inode *ip, xfs_off_t offset,
75			    xfs_off_t len);
76int	xfs_collapse_file_space(struct xfs_inode *, xfs_off_t offset,
77				xfs_off_t len);
78int	xfs_insert_file_space(struct xfs_inode *, xfs_off_t offset,
79				xfs_off_t len);
80
81/* EOF block manipulation functions */
82bool	xfs_can_free_eofblocks(struct xfs_inode *ip, bool force);
83int	xfs_free_eofblocks(struct xfs_inode *ip);
84
85int	xfs_swap_extents(struct xfs_inode *ip, struct xfs_inode *tip,
86			 struct xfs_swapext *sx);
87
88xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb);
89
90xfs_extnum_t xfs_bmap_count_leaves(struct xfs_ifork *ifp, xfs_filblks_t *count);
91int xfs_bmap_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
92			  int whichfork, xfs_extnum_t *nextents,
93			  xfs_filblks_t *count);
94
95#endif	/* __XFS_BMAP_UTIL_H__ */