| Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 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; |
| Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 24 | struct xfs_bmap_free_item; |
| Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 25 | struct xfs_ifork; |
| 26 | struct xfs_inode; |
| 27 | struct xfs_mount; |
| 28 | struct xfs_trans; |
| 29 | |
| 30 | /* |
| 31 | * Argument structure for xfs_bmap_alloc. |
| 32 | */ |
| 33 | struct 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 | |
| 65 | int xfs_bmap_finish(struct xfs_trans **tp, struct xfs_bmap_free *flist, |
| 66 | int *committed); |
| 67 | int xfs_bmap_rtalloc(struct xfs_bmalloca *ap); |
| 68 | int xfs_bmapi_allocate(struct xfs_bmalloca *args); |
| 69 | int __xfs_bmapi_allocate(struct xfs_bmalloca *args); |
| 70 | int xfs_bmap_eof(struct xfs_inode *ip, xfs_fileoff_t endoff, |
| 71 | int whichfork, int *eof); |
| 72 | int xfs_bmap_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip, |
| 73 | int whichfork, int *count); |
| 74 | int 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 */ |
| 78 | typedef int (*xfs_bmap_format_t)(void **, struct getbmapx *, int *); |
| 79 | int 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 */ |
| 83 | void xfs_bmap_del_free(struct xfs_bmap_free *flist, |
| 84 | struct xfs_bmap_free_item *prev, |
| 85 | struct xfs_bmap_free_item *free); |
| 86 | int 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); |
| 90 | void xfs_bmap_adjacent(struct xfs_bmalloca *ap); |
| 91 | int 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 | |
| Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 95 | /* preallocation and hole punch interface */ |
| Christoph Hellwig | 83aee9e | 2013-10-12 00:55:07 -0700 | [diff] [blame] | 96 | int xfs_alloc_file_space(struct xfs_inode *ip, xfs_off_t offset, |
| 97 | xfs_off_t len, int alloc_type); |
| 98 | int xfs_free_file_space(struct xfs_inode *ip, xfs_off_t offset, |
| 99 | xfs_off_t len); |
| Christoph Hellwig | 865e944 | 2013-10-12 00:55:08 -0700 | [diff] [blame] | 100 | int xfs_zero_file_space(struct xfs_inode *ip, xfs_off_t offset, |
| 101 | xfs_off_t len); |
| Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 102 | |
| 103 | /* EOF block manipulation functions */ |
| 104 | bool xfs_can_free_eofblocks(struct xfs_inode *ip, bool force); |
| 105 | int xfs_free_eofblocks(struct xfs_mount *mp, struct xfs_inode *ip, |
| 106 | bool need_iolock); |
| 107 | |
| Dave Chinner | a133d95 | 2013-08-12 20:49:48 +1000 | [diff] [blame] | 108 | int xfs_swap_extents(struct xfs_inode *ip, struct xfs_inode *tip, |
| 109 | struct xfs_swapext *sx); |
| 110 | |
| Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 111 | xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb); |
| 112 | |
| 113 | #endif /* __XFS_BMAP_UTIL_H__ */ |