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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 char eof; /* set if allocating past last extent */
54 char wasdel; /* replacing a delayed allocation */
55 char userdata;/* set if is user data */
56 char aeof; /* allocated space at eof */
57 char conv; /* overwriting unwritten extents */
58 char stack_switch;
59 int flags;
60 struct completion *done;
61 struct work_struct work;
62 int result;
63};
64
65int xfs_bmap_finish(struct xfs_trans **tp, struct xfs_bmap_free *flist,
66 int *committed);
67int xfs_bmap_rtalloc(struct xfs_bmalloca *ap);
68int xfs_bmapi_allocate(struct xfs_bmalloca *args);
69int __xfs_bmapi_allocate(struct xfs_bmalloca *args);
70int xfs_bmap_eof(struct xfs_inode *ip, xfs_fileoff_t endoff,
71 int whichfork, int *eof);
72int xfs_bmap_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
73 int whichfork, int *count);
74int xfs_bmap_punch_delalloc_range(struct xfs_inode *ip,
75 xfs_fileoff_t start_fsb, xfs_fileoff_t length);
76
77/* bmap to userspace formatter - copy to user & advance pointer */
78typedef int (*xfs_bmap_format_t)(void **, struct getbmapx *, int *);
79int xfs_getbmap(struct xfs_inode *ip, struct getbmapx *bmv,
80 xfs_bmap_format_t formatter, void *arg);
81
82/* functions in xfs_bmap.c that are only needed by xfs_bmap_util.c */
83void xfs_bmap_del_free(struct xfs_bmap_free *flist,
84 struct xfs_bmap_free_item *prev,
85 struct xfs_bmap_free_item *free);
86int xfs_bmap_extsize_align(struct xfs_mount *mp, struct xfs_bmbt_irec *gotp,
87 struct xfs_bmbt_irec *prevp, xfs_extlen_t extsz,
88 int rt, int eof, int delay, int convert,
89 xfs_fileoff_t *offp, xfs_extlen_t *lenp);
90void xfs_bmap_adjacent(struct xfs_bmalloca *ap);
91int xfs_bmap_last_extent(struct xfs_trans *tp, struct xfs_inode *ip,
92 int whichfork, struct xfs_bmbt_irec *rec,
93 int *is_empty);
94
95/* preallocation and hole punch interface */
96int xfs_alloc_file_space(struct xfs_inode *ip, xfs_off_t offset,
97 xfs_off_t len, int alloc_type);
98int xfs_free_file_space(struct xfs_inode *ip, xfs_off_t offset,
99 xfs_off_t len);
100int xfs_zero_file_space(struct xfs_inode *ip, xfs_off_t offset,
101 xfs_off_t len);
102int xfs_collapse_file_space(struct xfs_inode *, xfs_off_t offset,
103 xfs_off_t len);
104
105/* EOF block manipulation functions */
106bool xfs_can_free_eofblocks(struct xfs_inode *ip, bool force);
107int xfs_free_eofblocks(struct xfs_mount *mp, struct xfs_inode *ip,
108 bool need_iolock);
109
110int xfs_swap_extents(struct xfs_inode *ip, struct xfs_inode *tip,
111 struct xfs_swapext *sx);
112
113xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb);
114
115#endif /* __XFS_BMAP_UTIL_H__ */
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__ */