blob: 2fdb72d2c908fc5f962f5beff4166c1b07c69f08 [file] [log] [blame]
Dave Chinner68988112013-08-12 20:49:42 +10001/*
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;
Dave Chinnerc24b5df2013-08-12 20:49:45 +100024struct xfs_bmap_free_item;
Dave Chinner68988112013-08-12 20:49:42 +100025struct 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 */
Dave Chinnercf11da92014-07-15 07:08:24 +100053 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 */
Dave Chinner68988112013-08-12 20:49:42 +100058 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);
Dave Chinner68988112013-08-12 20:49:42 +100067int 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
Dave Chinnerc24b5df2013-08-12 20:49:45 +100092/* preallocation and hole punch interface */
Christoph Hellwig83aee9e2013-10-12 00:55:07 -070093int 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);
Christoph Hellwig865e9442013-10-12 00:55:08 -070097int xfs_zero_file_space(struct xfs_inode *ip, xfs_off_t offset,
98 xfs_off_t len);
Namjae Jeone1d8fb82014-02-24 10:58:19 +110099int xfs_collapse_file_space(struct xfs_inode *, xfs_off_t offset,
100 xfs_off_t len);
Dave Chinnerc24b5df2013-08-12 20:49:45 +1000101
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
Dave Chinnera133d952013-08-12 20:49:48 +1000107int xfs_swap_extents(struct xfs_inode *ip, struct xfs_inode *tip,
108 struct xfs_swapext *sx);
109
Dave Chinner68988112013-08-12 20:49:42 +1000110xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb);
111
112#endif /* __XFS_BMAP_UTIL_H__ */