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_bmap_free_item;
25struct xfs_ifork;
26struct xfs_inode;
27struct xfs_mount;
28struct xfs_trans;
29
30/*
31 * Argument structure for xfs_bmap_alloc.
32 */
33struct xfs_bmalloca {
34	xfs_fsblock_t		*firstblock; /* i/o first block allocated */
35	struct xfs_bmap_free	*flist;	/* bmap freelist */
36	struct xfs_trans	*tp;	/* transaction pointer */
37	struct xfs_inode	*ip;	/* incore inode pointer */
38	struct xfs_bmbt_irec	prev;	/* extent before the new one */
39	struct xfs_bmbt_irec	got;	/* extent after, or delayed */
40
41	xfs_fileoff_t		offset;	/* offset in file filling in */
42	xfs_extlen_t		length;	/* i/o length asked/allocated */
43	xfs_fsblock_t		blkno;	/* starting block of new extent */
44
45	struct xfs_btree_cur	*cur;	/* btree cursor */
46	xfs_extnum_t		idx;	/* current extent index */
47	int			nallocs;/* number of extents alloc'd */
48	int			logflags;/* flags for transaction logging */
49
50	xfs_extlen_t		total;	/* total blocks needed for xaction */
51	xfs_extlen_t		minlen;	/* minimum allocation size (blocks) */
52	xfs_extlen_t		minleft; /* amount must be left after alloc */
53	bool			eof;	/* set if allocating past last extent */
54	bool			wasdel;	/* replacing a delayed allocation */
55	bool			userdata;/* set if is user data */
56	bool			aeof;	/* allocated space at eof */
57	bool			conv;	/* overwriting unwritten extents */
58	int			flags;
59	struct completion	*done;
60	struct work_struct	work;
61	int			result;
62};
63
64int	xfs_bmap_finish(struct xfs_trans **tp, struct xfs_bmap_free *flist,
65			int *committed);
66int	xfs_bmap_rtalloc(struct xfs_bmalloca *ap);
67int	xfs_bmap_eof(struct xfs_inode *ip, xfs_fileoff_t endoff,
68		     int whichfork, int *eof);
69int	xfs_bmap_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
70			      int whichfork, int *count);
71int	xfs_bmap_punch_delalloc_range(struct xfs_inode *ip,
72		xfs_fileoff_t start_fsb, xfs_fileoff_t length);
73
74/* bmap to userspace formatter - copy to user & advance pointer */
75typedef int (*xfs_bmap_format_t)(void **, struct getbmapx *, int *);
76int	xfs_getbmap(struct xfs_inode *ip, struct getbmapx *bmv,
77		xfs_bmap_format_t formatter, void *arg);
78
79/* functions in xfs_bmap.c that are only needed by xfs_bmap_util.c */
80void	xfs_bmap_del_free(struct xfs_bmap_free *flist,
81			  struct xfs_bmap_free_item *prev,
82			  struct xfs_bmap_free_item *free);
83int	xfs_bmap_extsize_align(struct xfs_mount *mp, struct xfs_bmbt_irec *gotp,
84			       struct xfs_bmbt_irec *prevp, xfs_extlen_t extsz,
85			       int rt, int eof, int delay, int convert,
86			       xfs_fileoff_t *offp, xfs_extlen_t *lenp);
87void	xfs_bmap_adjacent(struct xfs_bmalloca *ap);
88int	xfs_bmap_last_extent(struct xfs_trans *tp, struct xfs_inode *ip,
89			     int whichfork, struct xfs_bmbt_irec *rec,
90			     int *is_empty);
91
92/* preallocation and hole punch interface */
93int	xfs_alloc_file_space(struct xfs_inode *ip, xfs_off_t offset,
94			     xfs_off_t len, int alloc_type);
95int	xfs_free_file_space(struct xfs_inode *ip, xfs_off_t offset,
96			    xfs_off_t len);
97int	xfs_zero_file_space(struct xfs_inode *ip, xfs_off_t offset,
98			    xfs_off_t len);
99int	xfs_collapse_file_space(struct xfs_inode *, xfs_off_t offset,
100				xfs_off_t len);
101
102/* EOF block manipulation functions */
103bool	xfs_can_free_eofblocks(struct xfs_inode *ip, bool force);
104int	xfs_free_eofblocks(struct xfs_mount *mp, struct xfs_inode *ip,
105			   bool need_iolock);
106
107int	xfs_swap_extents(struct xfs_inode *ip, struct xfs_inode *tip,
108			 struct xfs_swapext *sx);
109
110xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb);
111
112#endif	/* __XFS_BMAP_UTIL_H__ */
113