1 /* 2 * Copyright (c) 2000,2002-2005 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_BTREE_H__ 19 #define __XFS_BMAP_BTREE_H__ 20 21 struct xfs_btree_cur; 22 struct xfs_btree_block; 23 struct xfs_mount; 24 struct xfs_inode; 25 struct xfs_trans; 26 27 /* 28 * Extent state and extent format macros. 29 */ 30 #define XFS_EXTFMT_INODE(x) \ 31 (xfs_sb_version_hasextflgbit(&((x)->i_mount->m_sb)) ? \ 32 XFS_EXTFMT_HASSTATE : XFS_EXTFMT_NOSTATE) 33 34 /* 35 * Btree block header size depends on a superblock flag. 36 */ 37 #define XFS_BMBT_BLOCK_LEN(mp) \ 38 (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \ 39 XFS_BTREE_LBLOCK_CRC_LEN : XFS_BTREE_LBLOCK_LEN) 40 41 #define XFS_BMBT_REC_ADDR(mp, block, index) \ 42 ((xfs_bmbt_rec_t *) \ 43 ((char *)(block) + \ 44 XFS_BMBT_BLOCK_LEN(mp) + \ 45 ((index) - 1) * sizeof(xfs_bmbt_rec_t))) 46 47 #define XFS_BMBT_KEY_ADDR(mp, block, index) \ 48 ((xfs_bmbt_key_t *) \ 49 ((char *)(block) + \ 50 XFS_BMBT_BLOCK_LEN(mp) + \ 51 ((index) - 1) * sizeof(xfs_bmbt_key_t))) 52 53 #define XFS_BMBT_PTR_ADDR(mp, block, index, maxrecs) \ 54 ((xfs_bmbt_ptr_t *) \ 55 ((char *)(block) + \ 56 XFS_BMBT_BLOCK_LEN(mp) + \ 57 (maxrecs) * sizeof(xfs_bmbt_key_t) + \ 58 ((index) - 1) * sizeof(xfs_bmbt_ptr_t))) 59 60 #define XFS_BMDR_REC_ADDR(block, index) \ 61 ((xfs_bmdr_rec_t *) \ 62 ((char *)(block) + \ 63 sizeof(struct xfs_bmdr_block) + \ 64 ((index) - 1) * sizeof(xfs_bmdr_rec_t))) 65 66 #define XFS_BMDR_KEY_ADDR(block, index) \ 67 ((xfs_bmdr_key_t *) \ 68 ((char *)(block) + \ 69 sizeof(struct xfs_bmdr_block) + \ 70 ((index) - 1) * sizeof(xfs_bmdr_key_t))) 71 72 #define XFS_BMDR_PTR_ADDR(block, index, maxrecs) \ 73 ((xfs_bmdr_ptr_t *) \ 74 ((char *)(block) + \ 75 sizeof(struct xfs_bmdr_block) + \ 76 (maxrecs) * sizeof(xfs_bmdr_key_t) + \ 77 ((index) - 1) * sizeof(xfs_bmdr_ptr_t))) 78 79 /* 80 * These are to be used when we know the size of the block and 81 * we don't have a cursor. 82 */ 83 #define XFS_BMAP_BROOT_PTR_ADDR(mp, bb, i, sz) \ 84 XFS_BMBT_PTR_ADDR(mp, bb, i, xfs_bmbt_maxrecs(mp, sz, 0)) 85 86 #define XFS_BMAP_BROOT_SPACE_CALC(mp, nrecs) \ 87 (int)(XFS_BMBT_BLOCK_LEN(mp) + \ 88 ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))) 89 90 #define XFS_BMAP_BROOT_SPACE(mp, bb) \ 91 (XFS_BMAP_BROOT_SPACE_CALC(mp, be16_to_cpu((bb)->bb_numrecs))) 92 #define XFS_BMDR_SPACE_CALC(nrecs) \ 93 (int)(sizeof(xfs_bmdr_block_t) + \ 94 ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))) 95 #define XFS_BMAP_BMDR_SPACE(bb) \ 96 (XFS_BMDR_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs))) 97 98 /* 99 * Maximum number of bmap btree levels. 100 */ 101 #define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)]) 102 103 /* 104 * Prototypes for xfs_bmap.c to call. 105 */ 106 extern void xfs_bmdr_to_bmbt(struct xfs_inode *, xfs_bmdr_block_t *, int, 107 struct xfs_btree_block *, int); 108 extern void xfs_bmbt_get_all(xfs_bmbt_rec_host_t *r, xfs_bmbt_irec_t *s); 109 extern xfs_filblks_t xfs_bmbt_get_blockcount(xfs_bmbt_rec_host_t *r); 110 extern xfs_fsblock_t xfs_bmbt_get_startblock(xfs_bmbt_rec_host_t *r); 111 extern xfs_fileoff_t xfs_bmbt_get_startoff(xfs_bmbt_rec_host_t *r); 112 extern xfs_exntst_t xfs_bmbt_get_state(xfs_bmbt_rec_host_t *r); 113 114 extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(xfs_bmbt_rec_t *r); 115 extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(xfs_bmbt_rec_t *r); 116 117 extern void xfs_bmbt_set_all(xfs_bmbt_rec_host_t *r, xfs_bmbt_irec_t *s); 118 extern void xfs_bmbt_set_allf(xfs_bmbt_rec_host_t *r, xfs_fileoff_t o, 119 xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v); 120 extern void xfs_bmbt_set_blockcount(xfs_bmbt_rec_host_t *r, xfs_filblks_t v); 121 extern void xfs_bmbt_set_startblock(xfs_bmbt_rec_host_t *r, xfs_fsblock_t v); 122 extern void xfs_bmbt_set_startoff(xfs_bmbt_rec_host_t *r, xfs_fileoff_t v); 123 extern void xfs_bmbt_set_state(xfs_bmbt_rec_host_t *r, xfs_exntst_t v); 124 125 extern void xfs_bmbt_disk_set_allf(xfs_bmbt_rec_t *r, xfs_fileoff_t o, 126 xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v); 127 128 extern void xfs_bmbt_to_bmdr(struct xfs_mount *, struct xfs_btree_block *, int, 129 xfs_bmdr_block_t *, int); 130 131 extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level); 132 extern int xfs_bmdr_maxrecs(int blocklen, int leaf); 133 extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf); 134 135 extern int xfs_bmbt_change_owner(struct xfs_trans *tp, struct xfs_inode *ip, 136 int whichfork, xfs_ino_t new_owner, 137 struct list_head *buffer_list); 138 139 extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *, 140 struct xfs_trans *, struct xfs_inode *, int); 141 142 #endif /* __XFS_BMAP_BTREE_H__ */ 143