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
23 struct xfs_bmbt_irec;
24 struct xfs_extent_free_item;
25 struct xfs_ifork;
26 struct xfs_inode;
27 struct xfs_mount;
28 struct xfs_trans;
29 struct xfs_bmalloca;
30
31 #ifdef CONFIG_XFS_RT
32 int 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 */
38 static inline int
xfs_bmap_rtalloc(struct xfs_bmalloca * ap)39 xfs_bmap_rtalloc(struct xfs_bmalloca *ap)
40 {
41 return -EFSCORRUPTED;
42 }
43 #endif /* CONFIG_XFS_RT */
44
45 int xfs_bmap_eof(struct xfs_inode *ip, xfs_fileoff_t endoff,
46 int whichfork, int *eof);
47 int xfs_bmap_punch_delalloc_range(struct xfs_inode *ip,
48 xfs_fileoff_t start_fsb, xfs_fileoff_t length);
49
50 /* bmap to userspace formatter - copy to user & advance pointer */
51 typedef int (*xfs_bmap_format_t)(void **, struct getbmapx *, int *);
52 int xfs_getbmap(struct xfs_inode *ip, struct getbmapx *bmv,
53 xfs_bmap_format_t formatter, void *arg);
54
55 /* functions in xfs_bmap.c that are only needed by xfs_bmap_util.c */
56 int xfs_bmap_extsize_align(struct xfs_mount *mp, struct xfs_bmbt_irec *gotp,
57 struct xfs_bmbt_irec *prevp, xfs_extlen_t extsz,
58 int rt, int eof, int delay, int convert,
59 xfs_fileoff_t *offp, xfs_extlen_t *lenp);
60 void xfs_bmap_adjacent(struct xfs_bmalloca *ap);
61 int xfs_bmap_last_extent(struct xfs_trans *tp, struct xfs_inode *ip,
62 int whichfork, struct xfs_bmbt_irec *rec,
63 int *is_empty);
64
65 /* preallocation and hole punch interface */
66 int xfs_alloc_file_space(struct xfs_inode *ip, xfs_off_t offset,
67 xfs_off_t len, int alloc_type);
68 int xfs_free_file_space(struct xfs_inode *ip, xfs_off_t offset,
69 xfs_off_t len);
70 int xfs_zero_file_space(struct xfs_inode *ip, xfs_off_t offset,
71 xfs_off_t len);
72 int xfs_collapse_file_space(struct xfs_inode *, xfs_off_t offset,
73 xfs_off_t len);
74 int xfs_insert_file_space(struct xfs_inode *, xfs_off_t offset,
75 xfs_off_t len);
76
77 /* EOF block manipulation functions */
78 bool xfs_can_free_eofblocks(struct xfs_inode *ip, bool force);
79 int xfs_free_eofblocks(struct xfs_inode *ip);
80
81 int xfs_swap_extents(struct xfs_inode *ip, struct xfs_inode *tip,
82 struct xfs_swapext *sx);
83
84 xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb);
85
86 #endif /* __XFS_BMAP_UTIL_H__ */
87