1 /* 2 * Copyright (c) 2000,2005 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_IALLOC_BTREE_H__ 19 #define __XFS_IALLOC_BTREE_H__ 20 21 /* 22 * Inode map on-disk structures 23 */ 24 25 struct xfs_buf; 26 struct xfs_btree_cur; 27 struct xfs_mount; 28 29 /* 30 * Btree block header size depends on a superblock flag. 31 */ 32 #define XFS_INOBT_BLOCK_LEN(mp) \ 33 (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \ 34 XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN) 35 36 /* 37 * Record, key, and pointer address macros for btree blocks. 38 * 39 * (note that some of these may appear unused, but they are used in userspace) 40 */ 41 #define XFS_INOBT_REC_ADDR(mp, block, index) \ 42 ((xfs_inobt_rec_t *) \ 43 ((char *)(block) + \ 44 XFS_INOBT_BLOCK_LEN(mp) + \ 45 (((index) - 1) * sizeof(xfs_inobt_rec_t)))) 46 47 #define XFS_INOBT_KEY_ADDR(mp, block, index) \ 48 ((xfs_inobt_key_t *) \ 49 ((char *)(block) + \ 50 XFS_INOBT_BLOCK_LEN(mp) + \ 51 ((index) - 1) * sizeof(xfs_inobt_key_t))) 52 53 #define XFS_INOBT_PTR_ADDR(mp, block, index, maxrecs) \ 54 ((xfs_inobt_ptr_t *) \ 55 ((char *)(block) + \ 56 XFS_INOBT_BLOCK_LEN(mp) + \ 57 (maxrecs) * sizeof(xfs_inobt_key_t) + \ 58 ((index) - 1) * sizeof(xfs_inobt_ptr_t))) 59 60 extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *, 61 struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t, 62 xfs_btnum_t); 63 extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int); 64 65 /* ir_holemask to inode allocation bitmap conversion */ 66 uint64_t xfs_inobt_irec_to_allocmask(struct xfs_inobt_rec_incore *); 67 68 #if defined(DEBUG) || defined(XFS_WARN) 69 int xfs_inobt_rec_check_count(struct xfs_mount *, 70 struct xfs_inobt_rec_incore *); 71 #else 72 #define xfs_inobt_rec_check_count(mp, rec) 0 73 #endif /* DEBUG */ 74 75 int xfs_finobt_calc_reserves(struct xfs_mount *mp, xfs_agnumber_t agno, 76 xfs_extlen_t *ask, xfs_extlen_t *used); 77 78 #endif /* __XFS_IALLOC_BTREE_H__ */ 79