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 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 *); 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 xfs_extnum_t xfs_bmap_count_leaves(struct xfs_ifork *ifp, xfs_filblks_t *count); 87 int xfs_bmap_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip, 88 int whichfork, xfs_extnum_t *nextents, 89 xfs_filblks_t *count); 90 91 #endif /* __XFS_BMAP_UTIL_H__ */ 92