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_bmap_free_item; 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 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 bool stack_switch; 59 bool kswapd; /* allocation in kswapd context */ 60 int flags; 61 struct completion *done; 62 struct work_struct work; 63 int result; 64 }; 65 66 int xfs_bmap_finish(struct xfs_trans **tp, struct xfs_bmap_free *flist, 67 int *committed); 68 int xfs_bmap_rtalloc(struct xfs_bmalloca *ap); 69 int xfs_bmapi_allocate(struct xfs_bmalloca *args); 70 int __xfs_bmapi_allocate(struct xfs_bmalloca *args); 71 int xfs_bmap_eof(struct xfs_inode *ip, xfs_fileoff_t endoff, 72 int whichfork, int *eof); 73 int xfs_bmap_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip, 74 int whichfork, int *count); 75 int xfs_bmap_punch_delalloc_range(struct xfs_inode *ip, 76 xfs_fileoff_t start_fsb, xfs_fileoff_t length); 77 78 /* bmap to userspace formatter - copy to user & advance pointer */ 79 typedef int (*xfs_bmap_format_t)(void **, struct getbmapx *, int *); 80 int xfs_getbmap(struct xfs_inode *ip, struct getbmapx *bmv, 81 xfs_bmap_format_t formatter, void *arg); 82 83 /* functions in xfs_bmap.c that are only needed by xfs_bmap_util.c */ 84 void xfs_bmap_del_free(struct xfs_bmap_free *flist, 85 struct xfs_bmap_free_item *prev, 86 struct xfs_bmap_free_item *free); 87 int xfs_bmap_extsize_align(struct xfs_mount *mp, struct xfs_bmbt_irec *gotp, 88 struct xfs_bmbt_irec *prevp, xfs_extlen_t extsz, 89 int rt, int eof, int delay, int convert, 90 xfs_fileoff_t *offp, xfs_extlen_t *lenp); 91 void xfs_bmap_adjacent(struct xfs_bmalloca *ap); 92 int xfs_bmap_last_extent(struct xfs_trans *tp, struct xfs_inode *ip, 93 int whichfork, struct xfs_bmbt_irec *rec, 94 int *is_empty); 95 96 /* preallocation and hole punch interface */ 97 int xfs_alloc_file_space(struct xfs_inode *ip, xfs_off_t offset, 98 xfs_off_t len, int alloc_type); 99 int xfs_free_file_space(struct xfs_inode *ip, xfs_off_t offset, 100 xfs_off_t len); 101 int xfs_zero_file_space(struct xfs_inode *ip, xfs_off_t offset, 102 xfs_off_t len); 103 int xfs_collapse_file_space(struct xfs_inode *, xfs_off_t offset, 104 xfs_off_t len); 105 106 /* EOF block manipulation functions */ 107 bool xfs_can_free_eofblocks(struct xfs_inode *ip, bool force); 108 int xfs_free_eofblocks(struct xfs_mount *mp, struct xfs_inode *ip, 109 bool need_iolock); 110 111 int xfs_swap_extents(struct xfs_inode *ip, struct xfs_inode *tip, 112 struct xfs_swapext *sx); 113 114 xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb); 115 116 #endif /* __XFS_BMAP_UTIL_H__ */ 117